CN115209283A - Earphone set - Google Patents

Abstract

The application mainly relates to an earphone, a movement shell is used for contacting with the skin of a user, an energy conversion device enables the skin contact area of the movement shell to generate bone conduction sound under the action of the energy conversion device, a vibration film divides an accommodating cavity into a front cavity and a rear cavity, the movement shell is provided with a sound outlet communicated with the rear cavity, and the vibration film generates air conduction sound transmitted to human ears through the sound outlet in the relative movement process of the energy conversion device and the movement shell, so that the earphone can output the bone conduction sound and the air conduction sound, and the acoustic expressive force of the earphone is improved; the core module includes baffle and auxiliary device, and the baffle sets up in the back intracavity, and transducer is located the baffle towards one side of front chamber, and the baffle becomes to be close to the first sub-back chamber that the front chamber set up and keeps away from the sub-back chamber of second that the front chamber set up with the back chamber, goes out the phonate hole and communicates with the first sub-back chamber, and the auxiliary device setting is intracavity behind the second, both can expand the function of earphone through the auxiliary device, can avoid the air conduction sound of auxiliary device influence earphone again.

Description

a headphone

technical field

The present application relates to the technical field of electronic devices, and in particular, to an earphone.

Background technique

With the continuous popularization of electronic equipment, electronic equipment has become an indispensable social and entertainment tool in people's daily life, and people's requirements for electronic equipment are getting higher and higher. Taking electronic devices such as headphones as an example, it is not only urgently required to have excellent wearing comfort, but also to have the sound quality of bass dive, treble penetration, and good battery life.

SUMMARY OF THE INVENTION

The embodiment of the present application provides an earphone, the earphone includes a core module, the core module includes a core casing, a transducer device and a diaphragm, and the core casing is used for contacting the user's skin and forming a container A cavity, the transducer device is arranged in the accommodating cavity, and is connected with the core casing, so that the skin contact area of the core casing can generate bone conduction sound under the action of the transducer device, and the diaphragm is connected to the transducer device. Between the casing and the casing to separate the accommodating cavity into a front cavity close to the skin contact area and a rear cavity far away from the skin contact area, the core casing is provided with a sound outlet that communicates with the rear cavity, and the diaphragm is replaced In the process of relative movement between the energy device and the core casing, the air conduction sound transmitted to the human ear through the sound outlet is generated; the core module also includes a baffle and an auxiliary device, the baffle is arranged in the back cavity, and the transducer device is located in the The baffle faces the side of the front cavity, and the baffle divides the rear cavity into a first sub-rear cavity set close to the front cavity and a second sub-rear cavity set away from the front cavity, and the sound outlet is communicated with the first sub-rear cavity to assist The device is disposed in the second sub-back cavity.

The beneficial effect of the present application is that the earphone provided by the present application can output bone conduction sound and air conduction sound by arranging a diaphragm between the transducer device and the core casing, thereby improving the acoustic performance of the earphone. Further, the function of the earphone is expanded by the auxiliary device, and the auxiliary device in the rear cavity is separated by the partition plate, so as to prevent the auxiliary device from affecting the air conduction sound of the earphone, thereby improving the acoustic performance of the earphone.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic structural diagram of an embodiment of an earphone provided by the present application;

2 is a schematic cross-sectional structure diagram of an embodiment of a core module provided by the present application;

3 is a schematic diagram of the comparison of frequency response curves before and after the earphone provided by the present application is provided with a diaphragm;

4 is a schematic cross-sectional structure diagram of an embodiment of a core casing provided by the present application;

5 is a schematic cross-sectional structure diagram of an embodiment of the transducer device provided by the present application;

6 is a partial cross-sectional structural schematic diagram of various embodiments of the diaphragm provided by the present application;

7 is a schematic diagram of a partial cross-sectional structure of a diaphragm provided by the present application;

8 is a schematic diagram of the principle structure of various embodiments of the sound guiding component provided by the present application;

FIG. 9 is a top-view structural schematic diagram of an embodiment of an acoustic resistance net provided by the present application;

10 is a schematic diagram of a frequency response curve of the air-conducted sound at the sound-guiding component of an embodiment of the earphone provided by the present application;

11 is a schematic diagram of a frequency response curve of air-conducted sound at the sound-guiding component of an embodiment of the earphone provided by the present application;

12 is a schematic diagram of the frequency response curve of the air-conducted sound at the pressure relief hole of an embodiment of the earphone provided by the present application;

13 is a schematic diagram illustrating the comparison of sound pressure distribution in the back cavity before and after the core module provided by the application with the sound adjustment hole;

14 is a schematic diagram of a frequency response curve of air-conducted sound at the sound-guiding component of an embodiment of the earphone provided by the present application;

15 is a schematic diagram of a frequency response curve of the air-conducted sound at the sound-guiding component of an embodiment of the earphone provided by the present application;

16 is a schematic diagram of the frequency response curve of the sound leakage of the core module provided by the application;

17 is a schematic diagram of the principle structure of an embodiment of the movement module provided by the present application;

18 is a schematic diagram of an exploded structure of an embodiment of the movement module provided by the present application;

19 is a schematic diagram of an exploded structure of an embodiment of a core module provided by the present application;

20 is a schematic cross-sectional structure diagram of an embodiment of a core module provided by the present application;

21 is a schematic cross-sectional structure diagram of an embodiment of a core module provided by the present application;

22 is a schematic diagram of an exploded structure of an embodiment of the ear hook assembly provided by the present application;

Figure 23 is a partial cross-sectional schematic view of the ear hook assembly in Figure 22;

Fig. 24 is a partial enlarged structural schematic diagram of region A in Fig. 23;

25 is a schematic diagram of an exploded structure of an embodiment of a rear hanging assembly provided by the present application;

Fig. 26 is a partial enlarged structural schematic diagram of region B in Fig. 25;

FIG. 27 is a schematic structural diagram of the metal connector in FIG. 25 on one side in contact with the wire;

Figure 28 is a partial cross-sectional schematic view of the rear hanger assembly in Figure 25;

FIG. 29 is a schematic structural diagram of an embodiment of a coil support provided by the present application.

Detailed ways

The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is particularly pointed out that the following examples are only used to illustrate the present application, but do not limit the scope of the present application. Likewise, the following embodiments are only some of the embodiments of the present application but not all of the embodiments, and all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

Reference in this application to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in an embodiment of the present application. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

Referring to FIG. 1 , the earphone 100 may include two core modules 10 , two ear hook assemblies 20 and a rear hook assembly 30 . The two ends of the rear hanging assembly 30 are respectively connected with one end of a corresponding ear hanging assembly 20 , and the other end of each ear hanging assembly 20 away from the rear hanging assembly 30 is respectively connected with a corresponding core module 10 . Further, the rear hanging assembly 30 can be configured in a curved shape for being mounted on the back side of the user's head, and the ear hanging assembly 20 can also be configured in a curved shape for hanging on the user's ear and head In between, it is convenient to meet the wearing requirement of the earphone 100 ; and the core module 10 is used to convert the electrical signal into mechanical vibration, so that the user can hear the sound through the earphone 100 . In this way, when the earphone 100 is in the wearing state, the two core modules 10 are located on the left and right sides of the user's head, respectively, and the two core modules 10 are also located in the two ear hanging assemblies 20 and the rear hanging assembly. With the cooperation of 30 , the user's head is held down, and the user can also hear the sound output by the earphone 100 .

It should be noted that the earphone 100 can also be worn in other ways, for example, the ear-hook assembly 20 covers or wraps the user's ear, and the rear-hook assembly 30 straddles the top of the user's head, which are not listed here.

With reference to FIG. 1 , the earphone 100 may further include a main control circuit board 40 and a battery 50 . Wherein, the main control circuit board 40 and the battery 50 may be arranged in the same accommodating compartment of the earhook assembly 20 , or may be disposed in the respective accommodating compartments of the two earhook assemblies 20 respectively. Further, both the main control circuit board 40 and the battery 50 can be electrically connected to the two core modules 10 through corresponding wires. The former can be used to control the core modules 10 to convert electrical signals into mechanical vibrations, and the latter can be used to control the core modules 10 to convert electrical signals into mechanical vibrations. It is used to provide power to the earphone 100 . Of course, the headset 100 described in the present application may also include microphones such as microphones and pickups, and communication elements such as Bluetooth and NFC, which may also be connected to the main control circuit board 40 and the battery 50 through corresponding wires to achieve corresponding functions. .

It should be noted that there are two movement modules 10 described in this application, and both movement modules 10 can convert electrical signals into movement vibrations, mainly to facilitate the earphone 100 to achieve stereo sound effects. Therefore, in some other application scenarios that do not have particularly high requirements on stereo, such as hearing aids for hearing patients, live teleprompter for hosts, etc., the headset 100 may also be provided with only one core module 10 .

Based on the above related descriptions, the movement module 10 is used to convert electrical signals into mechanical vibrations in a powered state, so that the user can hear the sound through the earphone 100 . Generally speaking, the aforementioned mechanical vibration can directly act on the user's auditory nerve based on the principle of bone conduction and mainly through the user's bones and tissues as a medium, or can also act on the user's tympanic membrane based on the principle of air conduction and mainly through the medium of air, and then Acts on the auditory nerve. For the sound heard by the user, the former may be referred to as "bone conduction sound" for short, and the latter may be referred to as "air conduction sound". Based on this, the core module 10 can form both bone conduction sound and air conduction sound, and can also form bone conduction sound and air conduction sound at the same time.

Referring to FIG. 2 and FIG. 1 , the core module 10 may include a core casing 11 and a transducer device 12 . Wherein, the movement case 11 is connected with one end of the ear hook assembly 20 and is used for contacting with the user's skin. Further, the core housing 11 also forms an accommodating cavity (not marked in the figure), and the transducer device 12 is disposed in the aforementioned accommodating cavity and connected to the core housing 11 . Wherein, the transducer device 12 is used to convert electrical signals into mechanical vibrations in an energized state, so that the skin contact area of the movement case 11 (for example, the front bottom plate 1161 shown in FIG. 4 ) acts on the transducer device 12 It can produce bone conduction sound. In this way, when the user wears the earphone 100, the transducer device 12 converts the electrical signal into vibration of the movement to drive the aforementioned skin contact area to generate mechanical vibration together, and the mechanical vibration is then directly transmitted through the user's bones and tissues as a medium. It acts on the auditory nerve of the user, so that the user can hear the bone conduction sound through the core module 10 .

Further, the core module 10 may further include a diaphragm 13 connected between the transducer device 12 and the core casing 11 , and the diaphragm 13 is used to separate the inner space of the core casing 11 (that is, the above-mentioned volume). The placement cavity) is divided into a front cavity 111 close to the aforementioned skin contact area and a rear cavity 112 away from the aforementioned skin contact area. In other words, when the user wears the earphone 100 , the front cavity 111 may be closer to the user than the rear cavity 112 . The core casing 11 is provided with a sound outlet 113 that communicates with the rear cavity 112 , and the diaphragm 13 can generate transmission to the human ear through the sound outlet 113 during the relative movement of the transducer device 12 and the core casing 11 . air conduction sound. In this way, the sound generated in the rear cavity 112 can be transmitted through the sound outlet 113 , and then act on the user's tympanic membrane through the air as a medium, so that the user can also hear the air conduction sound through the movement module 10 .

It should be noted that: with reference to FIG. 2 , when the transducer device 12 moves the above-mentioned skin contact area toward the direction close to the user's face, it can be simply regarded as the enhancement of bone conduction sound. At the same time, the part of the movement casing 11 opposite to the aforementioned skin contact area moves in a direction close to the user's face, and the transducer device 12 and the diaphragm 13 connected to it move due to the relationship between the acting force and the reaction force. The movement in the direction away from the user's face causes the air in the rear cavity 112 to be squeezed, which corresponds to the increase in air pressure. As a result, the sound transmitted through the sound outlet 113 is enhanced, which can be simply regarded as air conduction. Sound enhancement. Correspondingly, when the bone conduction sound is weakened, the air conduction sound is also weakened. Based on this, the bone conduction sound and the air conduction sound generated by the movement module 10 in the present application have the characteristic of having the same phase. Further, since the front cavity 111 and the rear cavity 112 are generally separated by structural components such as the diaphragm 13 and the transducer device 12 , the variation law of the air pressure in the front cavity 111 is just opposite to the variation law of the air pressure in the rear cavity 112 . . Based on this, the movement casing 11 may also be provided with a pressure relief hole 114 communicating with the front chamber 111 , and the pressure relief hole 114 enables the front chamber 111 to communicate with the external environment, that is, air can freely enter and exit the front chamber 111 . In this way, the change of the air pressure in the rear cavity 112 can not be blocked by the front cavity 111 as much as possible, which can effectively improve the acoustic performance of the air conduction sound generated by the movement module 10 . Wherein, the pressure relief hole 114 and the sound outlet hole 113 are staggered from each other, that is, the two are not adjacent to each other, so as to avoid the phenomenon of noise reduction due to the opposite phase between the two.

As an example, the actual area of the outlet end of the sound outlet hole 113 may be greater than or equal to 8 mm ² , so that the user can hear more air conduction sound. Wherein, the actual area of the inlet end of the sound outlet 113 may also be greater than or equal to the actual area of the outlet end thereof.

It should be noted that since the structural components such as the core casing 11 have a certain thickness, the through-holes such as the sound outlet hole 113 and the pressure relief hole 114 opened on the core casing 11 have a certain depth, which is relative to the above-mentioned capacity. In terms of accommodating cavity, the through hole has an inlet end close to the accommodating cavity and an outlet end far away from the accommodating cavity. Further, the actual area of the outlet end described in this application can be defined as the area of the end face where the outlet end is located.

In the above manner, since the air conduction sound and bone conduction sound generated by the movement module 10 originate from the same vibration source (ie, the transducer device 12 ), and the phases of the two are also the same, the user can hear the sound through the earphone 100 . The sound can be stronger, and the earphone 100 can also save more power, thereby extending the battery life of the earphone 100 . In addition, by rationally designing the structure of the movement module 10, the air conduction sound and the bone conduction sound can also cooperate with each other in the frequency range of the frequency response curve, so that the earphone 100 can have excellent acoustic performance in a specific frequency band force. For example, air conduction sound is used to compensate the low frequency band of bone conduction sound, and for example, air conduction sound is used to strengthen the middle frequency band and middle and high frequency band of bone conduction sound.

It should be noted that: in this application, the frequency range corresponding to the low frequency band may be 20-150Hz, the frequency range corresponding to the middle frequency band may be 150-5kHz, and the frequency range corresponding to the high frequency band may be 5k-20kHz. The frequency range corresponding to the middle and low frequency bands may be 150-500 Hz, and the frequency range corresponding to the middle and high frequency bands may be 500-5 kHz.

Based on the above detailed description and with reference to FIG. 3 , the above-mentioned skin contact area can generate bone-conducted sound under the action of the transducer device 12 , and the aforementioned bone-conducted sound has a corresponding frequency response curve. Wherein, the aforementioned frequency response curve may have at least one resonance peak. Further, the peak resonance frequency of the aforementioned resonance peak may satisfy the relational expression: |f1-f2|/f1≤50%. In addition, the difference between the peak resonance strength corresponding to f1 and the peak resonance strength corresponding to f2 may be less than or equal to 5db. Wherein, f1 is the peak resonance frequency of the aforementioned resonance peak when the diaphragm 13 is connected to the transducer device 12 and the core casing 11 , and f2 is the disconnection of the diaphragm 13 from any one of the transducer device 12 and the core casing 11 The peak resonant frequency of the aforementioned resonant peak when connected. In other words, |f1-f2|/f1 can be used to measure the influence of the diaphragm 13 on the transducer device 12 driving the aforementioned skin contact area; wherein, the smaller the ratio, the smaller the influence. In this way, on the basis of not affecting the original resonance system of the movement module 10 as much as possible, by introducing the diaphragm 13, the movement module 10 can synchronously output bone conduction sound and air conduction sound with the same phase, thereby improving the movement of the movement module. Group 10's acoustic expressiveness and make it more power efficient.

As an example, with reference to FIG. 3 , in this embodiment, the offset of the low frequency band or the mid-low frequency band in the frequency response curve may be mainly investigated, that is, f1≤500Hz, so that the low frequency, medium and low frequency of the bone conduction sound are as low as possible. Affected. The aforementioned offset may be less than or equal to 50 Hz, that is, |f1-f2|≤50 Hz, so that the diaphragm 13 does not affect the transducer device 12 to drive the above-mentioned skin contact area as much as possible. Further, the aforementioned offset can be greater than or equal to 5 Hz, that is, |f1-f2|≥5Hz, so that the diaphragm 13 has a certain structural strength and elasticity, reduces fatigue deformation during use, and further prolongs the vibration. The service life of the membrane 13.

It should be noted that: in conjunction with FIG. 3 , in this embodiment, it can be defined that the above-mentioned skin contact area has a first frequency response curve when the diaphragm 13 is connected to the transducer device 12 and the core housing 11 (for example, k1+k2 in FIG. 3 ) shown), the aforementioned skin contact area has a second frequency response curve when the diaphragm 13 is disconnected from any one of the transducer device 12 and the movement housing 11 (for example, as shown by k1 in FIG. 3 ). Further, for the frequency response curve described in this application, the horizontal axis may represent the frequency, and the unit is Hz; the vertical axis may represent the intensity, and the unit is dB.

4 and 2 , the core casing 11 may include a rear casing 115 and a front casing 116 connected with the rear casing 115 . Wherein, the rear casing 115 and the front casing 116 can be fastened and spliced together to form a accommodating cavity for accommodating structural components such as the transducer device 12 and the diaphragm 13 . Further, the front case 116 is used for contacting the user's skin to form a skin contact area of the movement case 11 , that is, when the movement case 11 is in contact with the user's skin, the front case 116 is relatively The rear case 115 is closer to the user. Based on this, the transducer device 12 can be connected to the front case 116 , so that the transducer device 12 drives the skin contact area of the movement case 11 to generate mechanical vibration accordingly. Further, the sound outlet hole 113 may be provided in the rear case 115 , and the pressure relief hole 114 may be provided in the front case 116 . The diaphragm 13 can be connected to the rear casing 115 , can also be connected to the front casing 116 , and can also be connected to the joint between the rear casing 115 and the front casing 116 .

As an example, the rear casing 115 may include a rear bottom plate 1151 and a rear cylindrical side plate 1152 that are integrally connected, and an end of the rear cylindrical side plate 1152 facing away from the rear bottom plate 1151 is connected to the front casing 116 . Wherein, the sound outlet hole 113 may be provided on the rear cylindrical side plate 1152 .

Further, an annular bearing platform 1153 may also be provided on the inner side surface of the movement casing 11 , for example, the annular bearing platform 1153 is arranged on the end of the rear cylindrical side plate 1152 away from the rear bottom plate 1151 . 4 , the rear bottom plate 1151 is used as a reference, and the annular bearing platform 1153 may be slightly lower than the end surface of the rear cylindrical side plate 1152 away from the rear bottom plate 1151 . Referring to FIG. 2 , in the vibration direction of the transducer device 12 , the sound outlet hole 113 may be located between the annular support platform 1153 and the rear bottom plate 1151 . Based on this, the cross-sectional area of the sound outlet 113 may gradually change in the direction from the inlet end of the sound outlet 113 to its outlet end (that is, the direction of the sound outlet 113 toward the sound outlet channel 141 mentioned later) Small, so that the annular bearing platform 1153 has a sufficient thickness in the vibration direction of the transducer device 12, thereby increasing the structural strength of the annular bearing platform 1153. In this way, when the rear casing 115 and the front casing 116 are fastened together, the front casing 116 can press and fix the coil support 121 mentioned later on the annular bearing platform 1153 . Further, the diaphragm 13 may be fixed on the annular support platform 1153 , or may be pressed and held on the annular support platform 1153 by the coil support 121 , and then connected to the core casing 11 .

As an example, the front casing 116 may include a front bottom plate 1161 and a front cylindrical side plate 1162 that are integrally connected, and an end of the front cylindrical side plate 1162 facing away from the front bottom plate 1161 is connected to the rear casing 115 . The area where the front bottom plate 1161 is located can be simply regarded as the skin contact area described in this application. Correspondingly, the pressure relief hole 114 may be provided in the front cylindrical side plate 1162 .

5 and 2 , the transducer device 12 may include a coil support 121 , a magnetic circuit system 122 , a coil 123 and a spring sheet 124 . The coil support 121 and the spring sheet 124 are arranged in the front cavity 111 . The central area of the spring piece 124 can be connected with the magnetic circuit system 122 , and the peripheral area of the spring piece 124 can be connected with the core casing 11 through the coil bracket 121 to suspend the magnetic circuit system 122 in the core casing 11 . Further, the coil 123 may be connected with the coil support 121 and extend into the magnetic gap of the magnetic circuit system 122 .

As an example, the coil support 121 may include an annular main body part 1211 and a first cylindrical support part 1212 , and one end of the first cylindrical support part 1212 is connected with the annular main body part 1211 . Wherein, the annular body portion 1211 can be connected with the peripheral region of the spring sheet 124, and the two can be formed into an integral structural member by means of a metal insert injection molding process. At this time, the annular main body portion 1211 may be connected to the front bottom plate 1161 by one or a combination of connection methods such as gluing, clipping, and the like. Further, the coil 123 is connected to the other end of the first cylindrical support portion 1222 away from the annular main body portion 1211 , so that the coil extends into the magnetic circuit system 122 . At this time, a part of the diaphragm 13 may be connected with the magnetic circuit system 122 , and the other part may be connected with at least one of the rear case 115 and the front case 116 .

Further, the coil support 121 may further include a second cylindrical support portion 1213 connected to the annular main body portion 1211 . The second cylindrical support portion 1213 surrounds the first cylindrical support portion 1212 and is connected to the first cylindrical support portion 1212 It extends laterally to the annular main body portion 1211 in the same direction. Wherein, the second cylindrical support part 1213 and the annular main body part 1211 can be connected with the front case 116 together to increase the connection strength between the coil support 121 and the movement case 11 . For example, the annular main body portion 1211 is connected to the front bottom plate 1161 , and at the same time, the second cylindrical bracket portion 1213 is connected to the second annular side plate 1152 . Correspondingly, the second cylindrical support portion 1213 may be provided with an escape hole 1214 communicating with the pressure relief hole 114 to prevent the second cylindrical support portion 1213 from blocking the communication between the pressure relief hole 114 and the front cavity 111 . At this time, a part of the diaphragm 13 can be connected to the magnetic circuit system 122 , and the other part can be connected to the other end of the second cylindrical support part 1213 away from the annular main body part 1211 , and then connected to the movement casing 11 . Based on this, after the movement module 10 is assembled, the other end of the second cylindrical support part 1213 away from the annular main body part 1211 can press the other part of the diaphragm 13 on the annular bearing platform 1153 .

It should be noted that: the first cylindrical support portion 1212 and/or the second cylindrical support portion 1213 may be a continuous and complete structure in the circumferential direction of the coil support 121 to increase the structural strength of the coil support 121, or may be Partially discontinuous structure to avoid other structural members.

As an example, the magnetic circuit system 122 may include a magnetic conductive cover 1221 and a magnet 1222, which cooperate to form a magnetic field. The magnetic conductive cover 1221 may include a bottom plate 1223 and a cylindrical side plate 1224 that are integrally connected. Further, the magnet 1222 is disposed in the cylindrical side plate 1224 and fixed on the bottom plate 1223. The side of the magnet 1222 facing away from the bottom plate 1223 can be connected to the middle area of the spring plate 124 through a connecting piece 1225, so that the coil 123 can extend into the magnet 1222 and the magnetic gap between the magnetic shield 1221. At this time, a part of the diaphragm 13 may be connected to the magnetic conductive cover 1221 .

It should be noted that the magnet 1222 may be a magnet group formed by a plurality of sub-magnets. In addition, a magnetic conducting plate (not marked in the figure) may also be provided on the side of the magnet 1222 away from the bottom plate 1223 .

6 , 5 and 2 , the diaphragm 13 may include a diaphragm body 131 , and the diaphragm body 131 may include a first connection portion 132 , a corrugated portion 133 and a second connection portion 134 that are integrally connected. The first connecting portion 132 surrounds the transducer device 12 and is connected to the transducer device 12 ; the second connecting portion 134 is arranged around the periphery of the first connecting portion 132 and is perpendicular to the vibration direction of the transducer device 12 The corrugated portion 133 is located in the spaced area between the first connecting portion 132 and the second connecting portion 134 and connects the first connecting portion 132 and the second connecting portion 134 .

As an example, the first connecting portion 132 can be configured in a cylindrical shape and can be connected with the magnetic conductive cover 1221 ; the second connecting portion 134 can be configured in a ring shape, and can be away from the annular main body from the second cylindrical support portion 1213 The other end of the part 1211 is connected to the movement case 11 . Wherein, referring to FIG. 5 , the connection point between the corrugated portion 133 and the first connection portion 132 may be lower than the end face of the cylindrical side plate 1224 away from the bottom plate 1223 .

Further, the corrugated portion 133 forms a concave area 135 between the first connection portion 132 and the second connection portion 134 , so that the first connection portion 132 and the second connection portion 134 can more easily vibrate the transducer device 12 . Relative movement occurs in the direction, thereby reducing the influence of the diaphragm 13 on the transducer device 12 . Wherein, with reference to FIG. 2 , the recessed area 135 may be recessed toward the rear cavity 112 . Of course, the concave area 135 may also be concave toward the front cavity 111 , that is, the concave direction of the concave area 135 shown in FIG. 2 is opposite.

It should be noted that the number of recessed areas 135 can be multiple, such as two or three, and are distributed at intervals in the vertical direction of the vibration direction of the transducer device 12; The depth in the directions can also vary. In this embodiment, the number of the recessed regions 135 is taken as an example for illustrative description.

As an example, the material of the diaphragm body 131 may be polycarbonate (Polycarbonate, PC), polyamide (Polyamides, PA), acrylonitrile-butadiene-styrene copolymer (Acrylonitrile Butadiene Styrene, ABS), polyamide Styrene (PS), High Impact Polystyrene (HIPS), Polypropylene (PP), Polyethylene Terephthalate (PET), Polyvinyl Chloride , PVC), Polyurethanes (PU), Polyethylene (Polyethylene, PE), Phenol Formaldehyde (PF), Urea-Formaldehyde (UF), Melamine-Formaldehyde (MF) ), Polyarylate (PAR), Polyetherimide (PEI), Polyimide (PI), PolyethyleneNaphthalate two formic acid glycol ester (PEN) , polyetheretherketone (Polyetheretherketone, PEEK), silica gel, etc. any one or a combination thereof. Among them, PET is a thermoplastic polyester, which is well formed, and the diaphragm made of it is often called Mylar film; PC has strong impact resistance and is dimensionally stable after molding; PAR is the input of PC. The graded version is mainly for environmental protection reasons; PEI is softer than PET, and has higher internal damping; PI has high temperature resistance, higher molding temperature, and long processing time; Coating; PU is often used in the damping layer or ring of composite materials, with high elasticity and high internal damping; PEEK is a newer material, resistant to friction and fatigue. It is worth noting that composite materials can generally take into account the characteristics of a variety of materials, such as double-layer structure (generally hot-pressed PU, increase internal resistance), three-layer structure (sandwich structure, intermediate damping layer PU, acrylic glue, UV adhesive, pressure-sensitive adhesive), five-layer structure (two layers of film are bonded by double-sided tape, and the double-sided tape has a base layer, usually PET).

Further, the diaphragm 13 may further include a reinforcement ring 136 , and the hardness of the reinforcement ring 136 may be greater than that of the diaphragm body 131 . Wherein, the reinforcing ring 136 may be arranged in a ring shape, the ring width may be greater than or equal to 0.4 mm, and the thickness may be less than or equal to 0.4 mm. Further, the reinforcing ring 136 is connected with the second connecting portion 134 , so that the second connecting portion 134 is connected with the movement case 11 through the reinforcing ring 136 . In this way, the structural strength of the edge of the diaphragm 13 is increased, thereby increasing the connection strength between the diaphragm 13 and the movement case 11 .

It should be noted that: the reinforcing ring 136 is arranged in a ring shape, mainly for the convenience of adapting to the annular structure of the second connecting portion 134; however, the reinforcing ring 136 may be a continuous complete ring or a discontinuous ring in structure. segmented ring. Further, after the movement module 10 is assembled, the other end of the second cylindrical support portion 1213 away from the annular main body portion 1211 can press and hold the reinforcing ring 136 on the annular bearing platform 1153 .

As an example, the first connecting portion 132 can be injection-molded on the outer peripheral surface of the magnetic guide cover 1221, and the reinforcing ring 136 can also be injection-molded on the second connecting portion 134 to simplify the connection between the two, and Increase the strength of the connection between the two. Wherein, the first connecting portion 132 can cover the cylindrical side plate 1224, and can also cover the bottom plate 1223, so as to increase the contact area between the first connecting portion 132 and the magnetic circuit system 122, thereby increasing the combination between the two. strength. Similarly, the second connecting portion 134 can be connected to the inner ring surface and one end surface of the reinforcing ring 136 to increase the contact area between the second connecting portion 134 and the reinforcing ring 136 , thereby increasing the bonding strength between the two. .

Referring to FIG. 6 , (a) to (d) in FIG. 6 mainly illustrate various structural deformations of the diaphragm main body 131 , and the main difference between them is the specific structure of the corrugated portion 133 . For (a) in FIG. 6 , the corrugated portion 133 can be arranged in a symmetrical structure, and the connection points formed by the two ends of the corrugated portion 133 and the first connecting portion 132 and the second connecting portion 134 respectively can also be coplanar, for example, two connections The projections of the points in the direction of vibration of the transducer device 12 coincide. For (b) in FIG. 6 , most of the corrugated portion 133 can be arranged in a symmetrical structure, but the two ends of the corrugated portion 133 and the connection points formed by the first connecting portion 132 and the second connecting portion 134 are not coplanar, for example, two The projections of the connection points in the vibration direction of the transducer device 12 are offset from each other. For (c) in FIG. 6 , the corrugated portion 133 may be arranged in an asymmetric structure, but its two ends are coplanar with the connection points formed by the first connection portion 132 and the second connection portion 134 respectively. For (d) in FIG. 6 , the corrugated portion 133 can be arranged in an asymmetric structure, and the two ends thereof are not coplanar with the connection points formed by the first connection portion 132 and the second connection portion 134 respectively.

Based on the above related descriptions, for the diaphragm 13, the diaphragm main body 131 has a certain structural strength to ensure its basic structure, fatigue resistance and other properties in advance, the softer the diaphragm main body 131, the easier it is to elastically deform , the influence on the transducer device 12 is smaller. Based on this, the thickness of the diaphragm body 131 may be less than or equal to 0.2 mm; preferably, the thickness of the diaphragm body 131 may be less than or equal to 0.1 mm. The elastic deformation of the diaphragm main body 131 may mainly occur in the corrugated portion 133 . Therefore, the thickness of the corrugated portion 133 may be smaller than that of other parts of the diaphragm main body 131 . Based on this, the thickness of the corrugated portion 133 may be less than or equal to 0.2 mm; preferably, the thickness of the corrugated portion 133 may be less than or equal to 0.1 mm. In this embodiment, an example is given by taking the diaphragm main body 131 as an example of a structure of equal thickness.

7, in the vibration direction of the transducer device 12, the recessed area 135 may have a depth H; in the vertical direction of the vibration direction of the transducer device 12, the recessed area 135 may have a half depth width W1, the first connection part There may be a separation distance W2 between the 132 and the second connecting portion 134 . Wherein, 0.2≤W1/W2≤0.6, which can not only ensure the size of the deformable area on the corrugated portion 133, but also avoid the occurrence of structural damage between the corrugated portion 133 and the first connecting portion 132 and/or the movement case 11. put one's oar in. Similarly, 0.2≤H/W2≤1.4, which can not only ensure the size of the deformable area on the corrugated portion 133, and make it sufficiently soft, but also avoid the corrugated portion 133 and the first connecting portion 132 and/or the movement case. Structural interference occurs between 11 and the corrugated portion 133 is prevented from being difficult to vibrate due to its excessive self-weight.

It should be noted that: the half-depth width W1 refers to the width of the recessed region 135 at a depth of 1/2H.

Further, the corrugated portion 133 may include a first transition section 1331 , a second transition section 1332 , a third transition section 1333 , a fourth transition section 1334 and a fifth transition section 1335 that are integrally connected. Wherein, one end of the first transition section 1331 and the second transition section 1332 can be connected with the first connecting portion 132 and the second connecting portion 134 respectively, and extend toward each other; one end of the third transition section 1333 and the fourth transition section 1334 are respectively Connected to the other ends of the first transition section 1331 and the second transition section 1332 , two ends of the fifth transition section 1335 are respectively connected to the other ends of the third transition section 1333 and the fourth transition section 1334 . At this time, each of the aforementioned transition sections together forms a concave area 135 . Wherein, in the direction from the connection point (eg point 7A) between the first transition section 1331 and the first connection part 132 to the reference position point of the corrugated part 133 farthest from the first connection part 132 (eg point 7C), The angle between the tangent line of the first transition section 1331 toward the side of the recessed area 135 (eg, the dotted line TL1 ) and the vibration direction of the transducer device 12 may gradually decrease; In the direction from the connection point (eg, point 7B) between the parts 134 to the aforementioned reference position point, the tangent line (eg, dotted line TL2 ) of the second transition section 1332 toward the side of the recessed area 135 and the vibration direction of the transducer device 12 The included angle may be gradually reduced so that the recessed area 135 can be recessed toward the rear cavity 112 . Further, the angle between the tangent line of the third transition section 1333 toward the side of the recessed area 135 (eg, the dotted line TL3 ) and the vibration direction of the transducer device 12 may remain unchanged or gradually increase; similarly, the fourth transition section The included angle between the tangent line of 1334 toward the side of the recessed area 135 (eg, the dotted line TL4 ) and the vibration direction of the transducer device 12 may remain constant or gradually increase. At this time, the fifth transition section 1335 may be set in an arc shape.

As an example, the fifth transition section 1335 may be arranged in a circular arc shape, and the radius of the circular arc may be greater than or equal to 0.2 mm. 6 (a) or (b), the angle between the tangent of the third transition section 1333 toward the side of the recessed area 135 and the vibration direction of the transducer device 12 may be zero; similarly, the fourth transition The angle between the tangent to the side of the segment 1334 facing the recessed area 135 and the vibration direction of the transducer device 12 may be zero. At this time, the arc radius of the fifth transition section 1335 may be equal to half of the half-depth width W1 of the recessed region 135 . Of course, with reference to (c) or (d) in FIG. 6 , the angle between the tangent of the third transition section 1333 toward the side of the recessed area 135 and the vibration direction of the transducer device 12 may be zero; and the fourth transition section 1334 The angle between the tangent line toward the side of the recessed area 135 and the vibration direction of the transducer device 12 may be a constant value greater than zero. At this time, the fourth transition section 1334 may be tangent to the fifth transition section 1335 .

Further, the projected length of the first transition segment 1331 in the vertical direction of the vibration direction of the transducer device 12 can be defined as W3, the projected length of the second transition segment 1332 in the aforementioned vertical direction can be defined as W4, and the fifth transition segment can be defined as W4. The projected length of 1335 in the aforementioned vertical direction can be defined as W5, where 0.4≤(W3+W4)/W5≤2.5.

As an example, the first transition section 1331 and the second transition section 1332 may be respectively arranged in a circular arc shape. Wherein, the arc radius R1 of the first transition section 1331 may be greater than or equal to 0.2 mm, and the arc radius R2 of the second transition section 1332 may be greater than or equal to 0.3 mm, so as to avoid the local bending degree of the corrugated portion 133 being too large, thereby increasing the The reliability of the diaphragm 13. Of course, in some other embodiments, the first transition segment 1331 may include a circular arc segment and a flat segment connected to each other, the foregoing circular arc segment is connected to the third transition segment 1333, and the foregoing flat segment is connected to the first connecting portion 132; The second transition section 1332 may also be similar to the first transition section 1331 .

Based on the above detailed description and with reference to FIG. 7 , the thickness of the diaphragm body 131 may be 0.1 mm. Wherein, optionally W1≥0.9mm, optionally 0.3mm≤H≤1.0mm; optionally W3+W4≥0.3mm. Further, when 0.3mm≤W3+W4≤1.0mm, optionally W2 or W5≥0.4mm; when 0.4mm≤W3+W4≤0.7mm, optionally W2 or W5≥0.5mm. In a specific embodiment, W2 or W5=0.4mm, W3=0.42mm, W4=0.45mm; H=0.55mm.

7 and 5 , in the vibration direction of the transducer device 12 , the distance from the connection point (eg, point 7A) between the corrugated portion 133 and the first connection portion 132 to the outer end surface of the magnetic circuit system 122 away from the front cavity 111 It can be defined as d1, and the distance from the central area of the spring piece 124 to the outer end surface of the magnetic circuit system 122 away from the front cavity 111 can be defined as d2, where 0.3≤d1/d2≤0.8. At this time, since the size of the distance d2 can be relatively determined, the size of the distance d1 can be adjusted based on the distance d2, so as to adjust the specific position where the corrugated portion 133 is connected to the first connection portion 132 . Further, the distance from the geometric center of the magnet 1222 (eg point G) to the outer end surface of the magnetic circuit system 122 away from the front cavity 111 may be defined as d3, where 0.7≤d1/d3≤2. At this time, since the size of the distance d3 can be relatively determined, the size of the distance d1 can also be adjusted based on the distance d3, so as to adjust the specific position where the pleated portion 133 is connected to the first connecting portion 132 . In this way, one end of the magnetic circuit system 122 can be connected to the core casing 11 through the spring plate 124 and the coil support 121, and the other end can be connected to the core casing 11 through the diaphragm 13, that is, the spring plate 124 and the diaphragm Both ends of the magnetic circuit system 122 can be respectively fixed on the core casing 11 in the vibration direction of the transducer device 12, so that the stability of the magnetic circuit system 122 can be greatly improved.

As an example, d1≧d3, so that in the vibration direction of the transducer device 12, with reference to FIG. 2, the sound outlet 113 may be at least partially located between the above-mentioned connection point and the above-mentioned outer end surface. In this way, while increasing the stability of the magnetic circuit system 122 as much as possible, the volume of the rear cavity 112 can be reserved as much as possible to increase the acoustic performance of the movement module 10, and the volume of the rear cavity 112 can be increased as much as possible. The position and size of the sound hole 113 on the core casing 11 may be given enough design space to facilitate the flexible arrangement of the sound hole 113 .

Based on the above-mentioned related descriptions and in conjunction with FIG. 5 , taking the side of the bottom plate 1223 away from the cylindrical side plate 1224 as a reference, the distance d1 can also be regarded as the distance between the second connecting portion 134 and the bottom plate 1223 , and the distance d2 can also be regarded as the distance between the second connecting portion 134 and the bottom plate 1223 . As the distance between the spring piece 124 and the bottom plate 1223 , the distance d3 can also be regarded as the distance between the geometric center of the magnet 1222 and the bottom plate 1223 . In a specific embodiment, optionally d1=2.85mm, d2=4.63mm, d3=1.78mm.

Further, the connection point (eg point 7A) between the first connection part 132 and the corrugated part 133 and the connection point (eg point 7B) between the second connection part 134 and the corrugated part 133 are respectively in the vibration direction of the transducer device 12 The distance between projections on can be defined as d4, where 0≤d4/W2≤1.8. At this time, the specific position where the corrugated portion 133 is connected to the first connecting portion 132 can also be adjusted. Wherein, with reference to (a) or (c) in FIG. 6 , the connection point between the first connection portion 132 and the corrugated portion 133 and the connection point between the second connection portion 134 and the corrugated portion 133 may be located in the transducer device 12 , respectively. The projections in the vibration direction coincide, that is, d4=0. Of course, with reference to (b) or (d) in FIG. 6 , the connection point between the first connection portion 132 and the pleated portion 133 (eg, point 7A) and the connection point between the second connection portion 134 and the pleated portion 133 (eg, point 7A) The projections of point 7B) in the vibration direction of the transducer device 12 can be offset from each other, that is, d4>0.

Referring to FIG. 8 and FIG. 2 , the core module 10 may further include a sound guide member 14 connected to the core casing 11 . The sound guide member 14 is provided with a sound guide channel 141, and the sound guide channel 141 communicates with the sound outlet hole 113 and is used to guide the above-mentioned air-guided sound to the human ear. In other words, the sound guide member 14 can be used to change the propagation path/direction of the aforementioned air-guided sound, thereby changing the directivity of the aforementioned air-guided sound; and can be used to shorten the distance between the sound outlet 113 and the human ear, thereby increasing the aforementioned Intensity of air conduction sound. In addition, the sound guide member 14 can also make the actual output position of the air-guided sound from the earphone 100 further away from the rear end surface of the movement case 11 opposite to its skin contact area (for example, the area where the rear bottom plate 1151 is located), so as to improve the The possible sound leakage at the rear bottom plate 1151 cancels the inversion of the sound at the sound outlet 113 . In this way, when the user wears the earphone 100, the user can better hear the aforementioned air conduction sound.

Generally, in order to ensure the sound quality, the frequency response curve should be relatively flat in a wider frequency band, that is, the resonant peak should be located at a higher frequency position as much as possible. The frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 has a resonance peak, and the peak resonance frequency of the resonance peak may be greater than or equal to 1 kHz; preferably, the peak resonance frequency may be greater than or equal to 2 kHz, The earphone 100 has a better voice output effect; more preferably, the peak resonance frequency can be greater than or equal to 3.5kHz, so that the earphone 100 has a better music output effect; the peak resonance frequency can be further greater than or equal to 4.5kHz.

Based on the above related descriptions, the sound guiding channel 141 communicates with the rear cavity 112 through the sound outlet hole 113, which can constitute a typical Helmholtz resonance cavity structure. Among them, based on the Helmholtz resonant cavity model, the relationship between its resonant frequency f and the volume V of the back cavity 112, the cross-sectional area S of the acoustic channel 141, the equivalent radius R and its length L can satisfy the relationship: f∝[ S/(VL+1.7VR)] ^1/2 . Obviously, under the condition that the volume of the back cavity 112 is constant, increasing the cross-sectional area of the sound guiding channel 141 and/or reducing the length of the sound guiding channel 141 is beneficial to increase the resonant frequency, thereby making the above-mentioned air-conducting sound as high as possible. move frequently.

As an example, the length of the sound guide channel 141 may be less than or equal to 7 mm. Preferably, the length of the sound guide channel 141 may be between 2mm and 5mm. Wherein, in the vibration direction of the transducer device 12, the distance between the outlet end of the sound guiding channel 141 and the rear end surface of the core casing 11 away from the above-mentioned skin contact area may be greater than or equal to 3 mm, thereby avoiding the movement of the core casing. The sound leakage generated by the rear end surface of the body 11 cancels the inversion of the air conduction sound at the outlet end of the sound conduction channel 141 .

As an example, the cross-sectional area of the sound guide channel 141 may be greater than or equal to 4.8 mm ² . Preferably, the cross-sectional area of the sound guide channel 141 may be greater than or equal to 8 mm ² . Further, with reference to FIG. 2 , the cross-sectional area of the sound guiding channel 141 can be gradually increased along the transmission direction of the above-mentioned air-conducting sound (that is, in the direction away from the sound outlet 113 ), so that the sound guiding channel 141 can be arranged in a and can extend toward the front housing 116, so as to guide the above-mentioned air conduction sound. The cross-sectional area of the inlet end of the sound guide channel 141 may be greater than or equal to 10 mm ² ; or the cross-sectional area of the outlet end of the sound guide channel 141 may be greater than or equal to 15 mm ² .

As an example, the ratio between the volume of the acoustic channel 141 and the volume of the back cavity 112 may be between 0.05 and 0.9. The volume of the back cavity 112 may be less than or equal to 400 mm ³ . Preferably, the volume of the rear cavity 112 may be between 200 mm ³ and 400 mm ³ .

In a specific embodiment, the sound guide channel 141 may be configured in a horn shape. The length of the sound guiding channel 141 may be 2.5 mm, and the cross-sectional areas of the inlet end and the outlet end of the sound guiding channel 141 may be 15 mm ² and 25.3 mm ² , respectively. Further, the volume of the rear cavity 112 may be 350 mm ³ .

Referring to FIG. 8 , (a) to (e) of FIG. 8 mainly illustrate various structural deformations of the sound guide member 14 , and the main difference between them is the specific structure of the sound guide channel 141 . Among them, for (a) to (c) in FIG. 8 , the sound guiding channel 141 can be simply regarded as a bent arrangement; and for (d) to (e) in FIG. 8 , the sound guiding channel 141 can be Simply thought of as a pass-through setup. Obviously, the above-mentioned air-conducting sound will have certain differences with the structural difference of the sound-guiding channel 141, specifically:

For (a) in FIG. 8 , the sound direction of the sound guide channel 141 points to the face of the user, and the distance from the outlet end of the sound guide channel 141 to the rear end surface can be increased, thereby optimizing the direction of the air guide sound. sex and strength.

For (b) in FIG. 8 , the sound output direction of the sound guide channel 141 points to the auricle of the user, so that the above-mentioned air-guided sound is more easily collected by the auricle and enters the ear canal, thereby optimizing the intensity of the aforementioned air-guided sound.

For (c) in FIG. 8 , the sound output direction of the sound guiding channel 141 also points to the ear canal of the user, which can also optimize the intensity of the aforementioned air conduction sound. At the same time, the outlet end of the sound guiding channel 141 adopts the oblique outlet mode, and the inclined outlet makes the actual area of the outlet end of the sound guiding channel 141 not limited by the cross-sectional area of the sound guiding channel 141, which is equivalent to increasing the transverse direction of the sound guiding channel 141. The cross-sectional area is further beneficial to the output of the above-mentioned air conduction sound.

For (d) in FIG. 8 , the wall surface of the sound guide channel 141 is flat, which is convenient for ejection during the manufacturing process.

For (e) in FIG. 8 , the wall surface of the sound guide channel 141 is a curved surface, which is conducive to the realization of the acoustic impedance matching between the sound guide channel 141 and the atmosphere, which is further conducive to the output of the above-mentioned air-guided sound.

It should be noted that the cross-sectional area of a certain point of the sound guiding channel 141 refers to the minimum area that can be intercepted when the sound guiding channel 141 is intercepted through this point. Further, the straight-through sound guiding channel means that the entirety of the inlet end and the outlet end of the sound guiding channel 141 can be observed from any one of the other. At this time, for the straight-through sound guide channel shown in (d) to (e) of FIG. 8 , the length of the sound guide channel 141 can be calculated in the following way: first determine the geometric center of the inlet end of the sound guide channel 141 ( For example, point 8A) and the geometric center of its outlet end (for example, point 8B); the aforementioned geometric centers are connected to form line segments 8A-8B, and the length of the line segment can simply be regarded as the length of the acoustic channel 141 . Correspondingly, the bent sound guide channel means that from either the inlet end and the outlet end of the sound guide channel 141 , the other cannot be observed or only a part of the other can be observed. At this time, for example, for the bent sound guide channel shown in (a) to (c) in FIG. 8 , the bent sound guide channel can be divided into two or more straight-through sub-guide channels, The sum of the lengths of the straight-through sub-guiding channels is taken as the length of the bending sound-guiding channels. For example: in (a) to (c) of Fig. 8, further determine the geometric center of the surface where the intermediate bend is located (for example, points 8C1, 8C2), and then connect the aforementioned geometric centers to form line segments 8A-8C1-8B (or 8A-8C1-8C2-8B), the length of the line segment can simply be regarded as the length of the sound guiding channel 141 .

2, the outlet end of the sound guide channel 141 is generally covered with a sound resistance net 140, which can be used to adjust the sound resistance of the air conduction sound output to the outside of the earphone 100 through the sound outlet 113, so as to weaken the aforementioned air conduction sound in the The peak resonant frequency of the resonance peak in the middle and high frequency bands or the high frequency band makes the frequency response curve smoother and the sound listening effect is better; it can also separate the rear cavity 112 from the outside to a certain extent, so as to increase the movement module 10 waterproof and dustproof performance. The acoustic resistance of the acoustic resistance net 140 may be less than or equal to 260 MKSrayls. Specifically, the porosity of the acoustic resistance mesh 140 may be greater than or equal to 13%; and/or, the pore size may be greater than or equal to 18 μm.

As an example, referring to FIG. 9 , the acoustic resistance net 140 may be woven from gauze wires, and factors such as the wire diameter and density of the gauze wires will affect the acoustic resistance of the acoustic impedance net 140 . Based on this, every four gauze wires intersecting with each other among the plurality of gauze wires arranged at intervals in the longitudinal direction and the interval in the lateral direction can be enclosed to form a void. Among them, the area of the area enclosed by the center line of the gauze wire can be defined as S1, and the area of the area (that is, the pore) actually enclosed by the edge of the gauze wire can be defined as S2; then the porosity can be defined as S2/ S1. Further, the pore size can be expressed as the distance between any two adjacent yarn threads, such as the side length of the pore.

Further, the effective area of a certain through hole or opening introduced in the following application can be defined as the product of its actual area and the porosity of the covered acoustic resistance net. For example: when the outlet end cover of the sound guiding channel 141 is provided with the acoustic resistance net 140, the effective area of the outlet end of the sound guiding channel 141 is the product of the actual area of the outlet end of the sound guiding channel 141 and the porosity of the sound resistance net 140; and When the outlet end of the sound guiding channel 141 is not covered with the acoustic resistance net 140 , the effective area of the outlet end of the sound guiding channel 141 is the actual area of the outlet end of the sound guiding channel 141 . Similarly, the effective area of the outlet end of the through holes such as the pressure relief hole and the sound adjustment hole mentioned later can also be respectively defined as the product of the actual area and the corresponding porosity, which will not be repeated here.

Based on the above related descriptions, in addition to the bone conduction sound, the user mainly hears the air conduction sound output to the outside of the earphone 100 through the sound outlet 113 and the sound guide channel 141 , rather than the pressure relief hole 114 output to the outside of the earphone 100 . Air-conducted sound outside the earphone 100 . Therefore, the effective area of the outlet end of the sound guide channel 141 can be designed to be larger than that of the pressure relief hole 114 .

Further, the size of the pressure relief hole 114 will affect the smoothness of the exhaust of the front cavity 111 , the difficulty of the vibration of the diaphragm 13 , and then affect the acoustic performance of the air conduction sound output to the outside of the earphone 100 through the sound outlet 113 . . Therefore, under the condition that the effective area of the outlet end of the sound guiding channel 141 is constant, for example, the actual area of the outlet end of the sound guiding channel 141 and/or the porosity of the acoustic resistance net 140 is constant, the outlet of the pressure relief hole 114 is adjusted in combination with the following table. The effective area of the end, such as the actual area of the outlet end of the pressure relief hole 114 and/or the acoustic resistance of the acoustic resistance net 1140 covered thereon, can change the air conduction sound output to the outside of the earphone 100 through the sound outlet 113 . Wherein, in the present application, the acoustic resistance is 0, which can simply be regarded as not being covered with an acoustic resistance net.

Frequency response curve Actual area/mm² Acoustic Resistance/MKSrayls Porosity 10-1 31.57 0 100% 10-2 2.76 0 100% 10-3 2.76 1000 3%

Referring to FIG. 10 , as the actual area of the outlet end of the pressure relief hole 114 increases, the exhaust of the front cavity 111 becomes smoother, and the peak resonance intensity of the low frequency or middle and low frequency bands increases significantly; as the outlet end of the pressure relief hole 114 increases With the addition of the acoustic resistance net 1140, the exhaust of the front cavity 111 is affected to a certain extent, so that the medium and low frequencies of the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 are reduced, and the frequency response curve is relatively flat.

Combined with the following table, adjusting the actual area of the outlet end of the pressure relief hole 114 and the acoustic resistance of the acoustic resistance net 1140 covered on it, the combination of the pressure relief holes 114 of different sizes and the acoustic resistance net 1140 of different acoustic resistance can be realized, thereby making The frequency response curves of the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 are generally consistent. Among them, if the acoustic resistance mesh 1140 with a porosity of 14% can be simply regarded as a single-layer mesh, then the acoustic resistance mesh 1140 with a porosity of 7% can be simply regarded as a double-layer mesh.

Referring to FIG. 11 , the larger the actual area of the outlet end of the pressure relief hole 114 is, the larger the acoustic resistance of the corresponding acoustic resistance net should be, so that the effective area of the outlet end of the pressure relief hole 114 can be kept roughly the same, so that the front cavity The degree of smoothness of the exhaust of 111 is substantially the same, so that the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 is substantially the same. However, referring to FIG. 12 , although the frequency response curves of the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 are generally the same, the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 is different. The same, that is, the sound leakage at the pressure relief hole 114 is different. Among them, with the increase of the actual area of the outlet end of the pressure relief hole 114 and the increase of the acoustic resistance of the acoustic resistance net 1140, the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 moves downward as a whole, that is, It is the sound leakage at the pressure relief hole 114 that is subsequently reduced. In other words, under the condition that the frequency response curve of the air-conducting sound at the sound-guiding component 14 remains substantially unchanged, the size of the pressure relief hole 114 can be increased as much as possible, and the acoustic resistance of the acoustic resistance net 1140 on the pressure relief hole 114 can be increased at the same time, so as to increase the sound resistance of the pressure relief hole 114. The sound leakage at the pressure relief hole 114 is made as small as possible. It can be seen that, on the premise that the effective area of the outlet end of the pressure relief hole 114 is less than or equal to 2.76 mm ² , the pressure relief can be reduced by increasing the actual area of the outlet end of the pressure relief hole 114 and the porosity of the acoustic resistance net 1140 Sound leakage at hole 114.

It should be noted that: due to the limited size of the movement casing 11, the single pressure relief hole 114 cannot be too large. Based on this, the pressure relief hole 114 may be set to at least one or at least two, such as three described below.

Based on the above detailed description, the effective area of the outlet end of the sound guide channel 141 may be larger than the effective area of the outlet end of each pressure relief hole 114 , so that the user can hear the air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113 . Wherein, based on the definition of the effective area, the actual area of the outlet end of the sound guide channel 141 may be greater than the actual area of the outlet end of each pressure relief hole 114 . Further, the effective area of the outlet end of the sound guide channel 141 may be greater than or equal to the sum of the effective areas of the outlet ends of all the pressure relief holes 114 . Wherein, the ratio between the sum of the effective areas of the outlet ends of all the pressure relief holes 114 and the effective area of the outlet ends of the sound guide channel 141 may be greater than or equal to 0.15. As an example, the effective area of the outlet end of the general relief hole 114 may be greater than or equal to 2.5 mm ² . In this way, the front cavity 111 can be exhausted smoothly, thereby improving the acoustic performance of the air-conducted sound output to the outside of the earphone 100 through the sound outlet hole 113 , and reducing the sound leakage at the pressure relief hole 114 .

As an example, the actual area of the outlet end of the sound guide channel 141 may be greater than or equal to 4.8 mm ² . Preferably, the actual area of the outlet end of the sound guide channel 141 may be greater than or equal to 8 mm ² . Accordingly, the sum of the actual areas of the outlet ends of all the pressure relief holes 114 may be greater than or equal to 2.6 mm ² . Preferably, the actual area of the outlet ends of all the pressure relief holes 114 may be greater than or equal to 10 mm ² . Wherein, when the number of pressure relief holes 114 is one, the sum of the actual areas of the outlet ends of all pressure relief holes 114 is the actual area of the outlet end of one pressure relief hole 114 ; the sound adjustment hole 117 is similar. In a specific embodiment, the actual area of the outlet end of the sound guide channel 141 may be 25.3 mm ² ; three pressure relief holes 114 may be provided, such as the first pressure relief hole 1141 and the second pressure relief hole 1142 mentioned later. , The actual area of the outlet end of the third pressure relief hole 1143 can be 11.4mm ² , 8.4mm ² and 5.8mm ² respectively.

Further, the outlet end of the sound guiding channel 141 may be covered with an acoustic resistance net 140 , and at least part of the outlet end of the pressure relief hole 114 may be covered with an acoustic resistance net 1140 . The porosity of the acoustic resistance net 1140 may be less than or equal to the porosity of the acoustic resistance net 140 . In a specific embodiment, the porosity of the acoustic resistance mesh 140 may be greater than or equal to 13%, and the porosity of the acoustic resistance mesh 1140 may be greater than or equal to 7%.

Based on the above related description, the sound guide channel 141 communicates with the rear cavity 112 through the sound outlet hole 113, which can constitute a typical Helmholtz resonant cavity structure and has a resonance peak. We can study the distribution of sound pressure in the rear cavity 112 when the Helmholtz resonant cavity structure resonates. Wherein, referring to FIG. 13( a ), a high pressure region away from the sound outlet 113 and a low pressure region close to the sound outlet 113 are formed in the rear cavity 112 . Further, when the Helmholtz resonant cavity structure resonates, it can be considered that a standing wave occurs in the rear cavity 112 . The wavelength of the standing wave corresponds to the size of the back cavity 112 . For example, the deeper the back cavity 112 is, that is, the longer the distance between the low pressure region and the high pressure region, the longer the wavelength of the standing wave, which leads to Helmholtz The resonant frequency of the resonant cavity structure is lower. Based on this, with reference to FIG. 13(b), by destroying the high-voltage region, for example, a through hole communicating with the rear cavity 112 is provided in the high-voltage region, so that the sound originally reflected in the high-voltage region cannot be reflected, and the aforementioned standing wave cannot be formed. . At this time, when the Helmholtz resonant cavity structure resonates, the high-voltage region in the back cavity 112 will move inward toward the low-voltage region, so that the wavelength of the standing wave is shortened, thereby making the Helmholtz resonant cavity The resonant frequency of the structure is increased.

Referring to FIG. 2 , the core housing 11 may also be provided with a sound adjustment hole 117 that communicates with the rear cavity 112 . Among them, under the same conditions, the high-pressure area in the rear cavity 112 with the sound-adjusting hole 117 can be most effectively destroyed. Of course, the sound adjustment hole 117 may also be located in any region between the high pressure region and the low pressure region in the rear cavity 112 . As an example, the sound adjustment holes 117 may be provided on the rear case 115 , and may be provided on both sides of the transducer device 12 opposite to the sound outlet holes 113 and the sound guide members 14 .

Further, referring to FIG. 14 , the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 has a resonance peak. In combination with the table below, in the case of not covering the acoustic resistance net, adjusting the actual area of the outlet end of the sound adjusting hole 117 can control the damage degree of the sound adjusting hole to the above-mentioned high-voltage area, and then adjust the peak resonance frequency of the resonance peak. Wherein, if the actual area of the outlet end of the sound adjustment hole 117 is 0, it can be regarded that the sound adjustment hole 117 is in a closed state.

Frequency response curve Actual area/mm² 14-1 0 14-2 1.7 14-3 2.8 14-4 28.44

Referring to FIG. 14 , the larger the actual area of the outlet end of the sound adjusting hole 117 is, the more obvious the damage effect on the above-mentioned high-voltage region is, and the peak resonance frequency of the resonance peak is relatively higher. Wherein, the peak resonant frequency of the resonance peak when the sound tuning hole 117 is in the open state is shifted to a high frequency compared with the peak resonance frequency of the resonance peak when the sound tuning hole 117 is in the closed state, and the offset may be greater than or equal to 500 Hz . Preferably, the aforementioned offset is greater than or equal to 1 kHz. Further, the peak resonance frequency of the resonance peak when the sound adjustment hole 117 is in the open state may be greater than or equal to 2 kHz, so that the earphone 100 has a better voice output effect. Preferably, the peak resonance frequency may be greater than or equal to 3.5 kHz, so that the earphone 100 has a better music output effect; the peak resonance frequency may be further greater than or equal to 4.5 kHz.

It should be noted that: due to the limited size of the movement casing 11, the single sound adjustment hole 117 cannot be too large. Based on this, at least one sound-tuning hole 117 may be provided, such as two described below.

Similarly, in addition to the bone conduction sound, the user mainly hears the air conduction sound output to the outside of the earphone 100 through the sound outlet 113 , rather than the air conduction sound output to the outside of the earphone 100 through the sound adjustment hole 117 . Therefore, the effective area of the outlet end of the sound guide channel 141 can be designed to be larger than that of the sound adjustment hole 117 .

14 and 13 , due to the addition of a sound adjustment hole 117 in the rear cavity 112 , a part of the sound leaks out from the sound adjustment hole 117 , that is, sound leakage is formed at the sound adjustment hole 117 , resulting in the output to the earphone through the sound outlet hole 113 The frequency response curve of the air conduction sound outside the 100 moves down as a whole. To this end, referring to FIG. 2 , at least part of the outlet end of the sound adjustment hole 117 may be covered with a sound resistance net 1170 to prevent the sound from leaking out of the sound adjustment hole 117 as much as possible while destroying the high pressure area in the rear cavity 112 . Wherein, with reference to the following table, adjusting the effective area of the outlet end of the sound adjustment hole 117, for example, the actual area of the outlet end of the sound adjustment hole 117 and/or the acoustic resistance of the sound resistance net 1170 covered on it, can make the sound hole 113 The air conduction sound output to the outside of the earphone 100 changes.

Frequency response curve Acoustic Resistance/MKSrayls 15-1 No tuning hole 15-2 0 15-3 145

Referring to FIG. 15 , a sound resistance net 1170 is added at the outlet end of the sound adjustment hole 117, which can ensure that there is no significant reflected sound at the sound adjustment hole 117 in the rear cavity 112 (that is, no standing wave, non-hard sound field boundary), so that the rear cavity 112 has no significant reflected sound at the sound adjustment hole 117. The high pressure in the cavity 112 is shifted; it can also prevent the sound from leaking out of the sound adjustment hole 117 to a certain extent, so that more sound can be output to the outside of the earphone 100 through the sound outlet 113 . Further, the peak resonance intensity of the mid-low frequency band increases significantly, and the volume of the air-conducted sound increases; the peak resonance intensity of the high frequency band also decreases to a certain extent, making the frequency response curve flatter in the high frequency band, and the sound quality of the high frequency is more balanced.

Based on the above detailed description, the effective area of the outlet end of the sound guide channel 141 may be larger than the effective area of the outlet end of each sound adjustment hole 117 , so that the user can hear the air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113 . Wherein, based on the definition of the effective area, the actual area of the outlet end of the sound guide channel 141 may be greater than the actual area of the outlet end of each sound adjustment hole 117 . Further, the effective area of the outlet end of the sound guide channel 141 may be greater than the sum of the effective areas of the outlet ends of all the sound adjustment holes 117 . Wherein, the ratio between the sum of the effective areas of the outlet ends of all the sound adjustment holes 117 and the effective area of the outlet ends of the sound guide channel 141 may be greater than or equal to 0.08. As an example, the sum of the effective areas of the outlet ends of all the sound adjustment holes 117 may be greater than or equal to 1.5 mm ² . Wherein, when the number of sound adjustment holes 117 is one, the sum of the effective areas of the outlet ends of all sound adjustment holes 117 is the effective area of the outlet end of one sound adjustment hole 117 ; the pressure relief hole 114 is similar. In this way, the peak resonance frequency of the resonant peak of the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 can be shifted to a high frequency as much as possible, and the sound leakage at the sound adjustment hole 117 can be reduced.

As an example, the sum of the actual areas of the outlet ends of all the sound adjustment holes 117 may be greater than or equal to 5.6 mm ² . In a specific embodiment, two sound adjustment holes 117 may be provided, such as the first sound adjustment hole 1171 and the second sound adjustment hole 1172 mentioned later, and the actual areas of the outlet ends thereof may be 7.6mm ² and 5.6mm respectively. ² .

Further, the outlet end of the sound guiding channel 141 may be covered with a sound resistance net 140 , and at least part of the outlet end of the sound adjustment hole 117 may be covered with a sound resistance net 1170 . The porosity of the acoustic resistance net 1170 may be less than or equal to the porosity of the acoustic resistance net 140 . In a specific embodiment, the porosity of the acoustic resistance mesh 140 may be greater than or equal to 13%, and the porosity of the acoustic resistance mesh 1170 may be less than or equal to 16%.

Based on the above related descriptions, for the pressure relief hole 114 and the sound outlet hole 113, the phases of the air conduction sound output to the outside of the earphone 100 through the two are opposite, so that the pressure relief hole 114 and the sound outlet hole 113 are in a three-dimensional space. It should be staggered as much as possible to avoid coherent cancellation of the air-conducted sound output to the outside of the earphone 100 through the two. To this end, the pressure relief hole 114 is as far away from the sound outlet hole 113 as possible. For the sound-tuning hole 117 and the sound-outlet hole 113, if the area where the sound-outlet hole 113 is located can simply be regarded as the low-pressure area in the rear cavity 112, then the area in the rear cavity 112 that is farthest from the area where the sound-outlet hole 113 is located is the It can be simply regarded as the high pressure area in the rear cavity 112; and the sound adjusting hole 117 can preferably be arranged in the high pressure area in the rear cavity 112 to destroy the original high pressure area and move it to the low pressure area. To this end, the sound-tuning hole 117 is as far away from the sound-out hole 113 as possible.

Further, since the pressure relief hole 114 is communicated with the front cavity 111, and the sound adjustment hole 117 is communicated with the rear cavity 112, the phases of the air conduction sound output to the outside of the earphone 100 through the pressure relief hole 114 and the sound adjustment hole 117 respectively are opposite. Therefore, the sound leakage from the pressure relief hole 114 and the sound adjustment hole 117 can be reduced by means of coherent cancellation. Based on this, at least some of the pressure relief holes 114 and at least some of the sound adjustment holes 117 may be disposed adjacent to each other, so as to create conditions for coherent cancellation. Wherein, in order to better coherently cancel the sound leakage of the pressure relief hole 114 and the sound adjustment hole 117, the distance between the two should be as small as possible, for example, the outlines of the outlet ends of the pressure relief hole 114 and the sound adjustment hole 117 The minimum distance between them is less than or equal to 2mm. Besides, the peak resonant frequency and/or the peak resonant intensity of the resonant peaks of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 and the sound adjustment hole 117 should also be matched as much as possible. However, in actual product design, due to the influence of specific structure and process tolerance, it is generally difficult to control the peak resonant frequency and/or peak resonant intensity of the resonant peaks of the aforementioned two air-conducting acoustics to be exactly the same, so the design should try to ensure that The peak resonance frequency and/or the peak resonance intensity of the resonant peaks of the aforementioned two air-conducting acoustics should not be too different.

16 , the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 has a first resonance peak f1, and the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the sound adjustment hole 117 has a second frequency response curve. Resonant peak f2. Wherein, with reference to the following table, the peak resonance frequency of the first resonance peak and the peak resonance frequency of the second resonance peak may be respectively greater than or equal to 2 kHz, and |f1-f2|/f1≤60%. As the difference between the peak resonant frequency of the first resonant peak and the peak resonant frequency of the second resonant peak gradually decreases, the wider the frequency bandwidth that can reduce sound leakage, that is, the frequency response curve becomes relatively flat, and the performance This means that the sound leakage of the earphone 100 is reduced, that is, the coherent cancellation effect of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 and the sound adjustment hole 117 is better. Preferably, the peak resonance frequency of the first resonance peak and the peak resonance frequency of the second resonance peak may be greater than or equal to 3.5k, respectively, and |f1-f2|≤2kHz. In this way, the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 and the sound adjustment hole 117 respectively is coherently canceled in the high frequency band as much as possible.

Frequency response curve Peak resonance frequency of f1/Hz Peak resonance frequency of f2/Hz 16-1 3500 5600 16-2 4500 5600 16-3 5000 5600

Further, since the front cavity 111 is provided with structural components such as the coil support 121 and the spring sheet 124, the wavelength of the standing wave in the front cavity 111 is relatively long; The wavelength of the standing wave in the back cavity 112 is relatively short. As such, the peak resonant frequency of the first resonant peak is generally lower than the peak resonant frequency of the second resonant peak. In order to better coherently cancel the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 and the sound adjustment hole 117, respectively, the peak resonance frequency of the first resonance peak should be shifted to the high frequency as much as possible, so that the as close as possible to the peak resonant frequency of the second resonant peak. Therefore, based on the Helmholtz resonant cavity model, the effective area of the outlet end of the pressure relief hole 114 of the adjacently arranged pressure relief holes 114 and the sound adjustment holes 117 may be larger than the effective area of the outlet end of the sound adjustment hole 117 . The ratio between the effective area of the outlet end of the pressure relief hole 114 and the effective area of the outlet end of the sound adjustment hole 117 in the adjacently arranged pressure relief holes 114 and the sound adjustment holes 117 may be less than or equal to 2. As an example, the actual area of the outlet end of the pressure relief hole 114 in the adjacently disposed pressure relief hole 114 and the sound adjustment hole 117 may be larger than the actual area of the outlet end of the sound adjustment hole 117 . Further, the outlet ends of the adjacent pressure relief holes 114 and sound adjustment holes 117 may also be covered with a sound resistance net 1140 and a sound resistance net 1170, respectively, and the porosity of the sound resistance net 1140 may be greater than that of the sound resistance net 1170. .

Referring to FIG. 17( a ), the pressure relief hole 114 may include a first pressure relief hole 1141 and a second pressure relief hole 1142 . Wherein, the first pressure relief hole 1141 may be disposed farther from the sound outlet hole 113 than the second pressure relief hole 1142 . At this time, the effective area of the outlet end of the first pressure relief hole 1141 may be larger than the effective area of the outlet end of the second pressure relief hole 1142 . In this way, both the size of the core casing 11 and the exhaust requirements of the front cavity 111 can be taken into account, and the first pressure relief hole 1141 with a relatively large amount of exhaust gas can be kept as far away from the sound outlet hole 113 as possible, thereby reducing the pressure relief The influence of the sound leakage at the hole 114 on the air conduction sound at the sound outlet hole 113 . Further, the pressure relief hole 114 may further include a third pressure relief hole 1143 , and the first pressure relief hole 1141 may also be disposed farther from the sound outlet hole 113 than the third pressure relief hole 1143 . Wherein, the effective area of the outlet end of the second pressure relief hole 1142 may be larger than the effective area of the outlet end of the third pressure relief hole 1143 .

As an example, referring to FIG. 17( a ) and FIG. 2 , the sound outlet hole 113 and the first pressure relief hole 1141 may be located on opposite sides of the transducer device 12 ; and the second pressure relief hole 1142 and the third pressure relief hole 1142 The holes 1143 may be disposed opposite to each other, and may be located between the sound outlet hole 113 and the first pressure relief hole 1141 .

Further, at least part of the outlet end of the pressure relief hole 114 may be covered with an acoustic resistance net 1140 so as to adjust the effective area of the outlet end of the pressure relief hole 114 . In this embodiment, the outlet ends of the pressure relief holes 114 are respectively covered with acoustic resistance nets 1140 with the same acoustic resistance as an example for illustrative description. In this way, not only the acoustic performance and the waterproof and dustproof performance of the earphone 100 can be improved, but also the mixing of materials of the acoustic resistance mesh 1140 due to too many types of specifications can be avoided. Based on this, the corresponding effective area can be obtained by adjusting the actual area of the outlet end of the pressure relief hole 114 . For example, the actual area of the outlet end of the first pressure relief hole 1141 may be larger than the actual area of the outlet end of the second pressure relief hole 1142 , and the actual area of the outlet end of the second pressure relief hole 1142 may also be larger than the outlet end of the third pressure relief hole 1143 . actual area.

With reference to (b) of FIG. 17 , the sound adjustment hole 117 may include a first sound adjustment hole 1171 and a second sound adjustment hole 1172 . Wherein, the first sound adjustment hole 1171 may be disposed farther from the sound outlet hole 113 than the second sound adjustment hole 1172 . At this time, the effective area of the outlet end of the first sound adjustment hole 1171 may be larger than the effective area of the outlet end of the second sound adjustment hole 1172 , so as to destroy the high pressure area in the rear cavity 112 . In this way, both the size of the core casing 11 and the requirement of the sound adjustment hole 117 to destroy the high pressure region of the rear cavity 112 can be taken into account, and the resonant frequency of the air conduction sound at the sound hole 113 can be obtained as high as possible, and the degree of damage can be made as high as possible. The relatively large first sound adjustment hole 1171 is as far away as possible from the sound outlet hole 113 .

As an example, referring to FIG. 17( b ) and FIG. 2 , the sound-out hole 113 and the first sound-adjustment hole 1171 may be located on opposite sides of the transducer device 12 ; and the second sound-adjustment hole 1172 may be located in the sound-out hole 113 and the first sound hole 1171.

Further, at least a part of the outlet end cover of the sound adjustment hole 117 may be provided with a sound resistance net 1170 so as to adjust the effective area of the outlet end of the sound adjustment hole 117 . In this embodiment, the outlet ends of the sound adjustment holes 117 are respectively covered with acoustic resistance nets 1170 with the same acoustic resistance as an example for illustrative description. In this way, not only the acoustic performance and the waterproof and dustproof performance of the earphone 100 can be improved, but also the mixing of materials of the acoustic resistance mesh 1170 due to too many types of specifications can be avoided. Based on this, the corresponding effective area can be obtained by adjusting the actual area of the outlet end of the sound adjusting hole 117 . For example, the actual area of the outlet end of the first sound adjustment hole 1171 may be larger than the actual area of the outlet end of the second sound adjustment hole 1172 . Specifically, the actual area of the outlet end of the first sound adjustment hole 1171 may be greater than or equal to 3.8 mm ² ; and/or the actual area of the outlet end of the second sound adjustment hole 1172 may be greater than or equal to 2.8 mm ² .

As an example, in conjunction with (c) and (d) of FIG. 17 , the first pressure relief hole 1141 and the first sound adjustment hole 1171 may be disposed adjacent to each other, and the second pressure relief hole 1142 and the second sound adjustment hole 1172 may also be arranged Adjacent settings. In this way, the air-conducted sound output to the outside of the earphone 100 through the first pressure relief hole 1141 and the first sound adjustment hole 1171 respectively can be coherently canceled, and output to the outside of the earphone 100 through the second pressure relief hole 1142 and the second sound adjustment hole 1172 Air-conducted sound outside the earphone 100 can also be coherently canceled.

Further, the effective area of the outlet end of the first pressure relief hole 1141 may be larger than the effective area of the outlet end of the first sound adjustment hole 1171, so that the peak resonance frequency of the air conduction sound output to the outside of the earphone 100 through the first pressure relief hole 1141 Shift to the high frequency as much as possible, so as to be as close as possible to the peak resonance frequency of the air-conducted sound output to the outside of the earphone 100 through the first sound adjustment hole 1171, so that the first pressure relief hole 1141 and the first sound adjustment respectively The air-conducted sound output from the hole 1171 to the outside of the earphone 100 can be better coherently canceled. Similarly, the effective area of the outlet end of the second pressure relief hole 1142 may be larger than the effective area of the outlet end of the second sound adjustment hole 1172 , which will not be repeated here.

Similar to the sound adjustment hole 117 destroying the high pressure region in the rear cavity 112, the second pressure relief hole 1142 and the third pressure relief hole 1143 will destroy the high pressure region in the front cavity 111, so that the wavelength of the standing wave in the front cavity 111 is reduced, Further, the peak resonance frequency of the air-conducted sound output to the outside of the earphone 100 through the first pressure relief hole 1141 can be shifted to a high frequency, so as to better match the air-conducted sound output to the outside of the earphone 100 through the first sound adjustment hole 1171. Coherent cancellation. Wherein, the offset may be greater than or equal to 500 Hz, and the peak resonance frequency of the resonance peak may be greater than or equal to 2 kHz. Preferably, the offset is greater than or equal to 1 kHz. Similarly, the peak resonance frequency of the air-conducted sound output to the outside of the earphone 100 through the second pressure relief hole 1142 can also be shifted to high frequencies. In short, the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 disposed adjacent to the sound adjustment hole 117 has a resonance peak, and the pressure relief hole 114 disposed adjacent to the sound adjustment hole 117 The peak resonance frequencies of the resonance peaks when the other pressure relief holes 114 are in the open state are shifted to high frequencies compared to the peak resonance frequencies of the resonance peaks when the other pressure relief holes 114 are in the closed state. Wherein, the peak resonance frequency of the resonance peak when the other pressure relief holes 114 are in the open state may be greater than or equal to 2 kHz.

17 and FIG. 2 , the core housing 11 may include a first side wall 17A and a second side wall 17B located on opposite sides of the transducer device 12 and connecting the first side wall 17A and the second side wall 17B and each other Spaced third sidewall 17C and fourth sidewall 17D. In short, the movement case 11 can be simplified as a rectangular frame. Of course, the third side wall 17C and the fourth side wall 17D may also be arranged in an arc shape, so that the movement casing 11 is arranged in a racetrack shape as a whole. The first side wall 17A is closer to the human ear than the second side wall 17B, and the third side wall 17C is closer to the ear hook assembly 20 than the fourth side wall 17D. Further, the sound outlet hole 113 can be provided on the first side wall 17A, so that the user can hear the air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113 and the sound guiding channel 141; the first pressure relief hole 1141 and the first pressure relief hole 1141 and the first The sound-adjusting holes 1171 may be respectively disposed on the second side walls 17B so as to be further away from the sound-out holes 113 . Correspondingly, the second pressure relief hole 1142 and the second sound adjustment hole 1172 may be respectively provided in one of the third side wall 17C and the fourth side wall 17D, and the third pressure relief hole 1143 may be provided in the third side wall 17C and the other of the fourth side walls 17D.

Based on the above related descriptions and in conjunction with FIG. 2 and FIG. 17 , the pressure relief hole 114 can make the front cavity 111 communicate with the outside of the earphone 100 , and the sound adjustment hole 117 can make the rear cavity 112 communicate with the outside of the earphone 100 ; and at least part of the pressure relief hole 114 and at least part of the sound adjustment holes 117 can also be arranged adjacent to each other, and the distance between the two can be less than or equal to 2 mm. For example, the first pressure relief hole 1141 is arranged adjacent to the first sound adjustment hole 1171, and the second pressure relief hole 1142 The second sound tuning holes 1172 are arranged adjacently. Based on this, the movement module 10 may further include a protective cover 15 , and the protective cover 15 may be covered on the periphery of the pressure relief hole 114 and the sound adjustment hole 117 . Among them, the protective cover 15 can be woven from metal wires, the wire diameter of the metal wire can be 0.1mm, and the mesh number of the protective cover 15 can be 90-100, so that it has a certain structural strength and good air permeability, so that both Intrusion of foreign objects into the core module 10 can be avoided, and the acoustic performance of the earphone 100 is not affected. In this way, the protective cover 15 can simultaneously cover the adjacent pressure relief holes 114 and sound adjustment holes 117 , that is, "one cover with two holes", thereby greatly reducing materials and improving the appearance quality of the earphone 100 .

As an example, referring to FIG. 18 , an accommodating area 118 may be provided on the outer surface of the core casing 11 , and the accommodating area 118 may be communicated with the outlet ends of the adjacently disposed pressure relief holes 114 and sound adjustment holes 117 . At this time, the protective cover 15 can be set in a plate shape, and can be fixed in the accommodating area 118 by one or a combination of connection methods such as clamping, gluing, welding, etc., for example, glued to the bottom of the accommodating area 118 Or welding connection to cover the pressure relief hole 114 and the sound adjustment hole 117 . Wherein, the outer surface of the protective cover 15 may be flush with the outer surface of the movement case 11 or have a circular arc transition, so as to improve the appearance quality of the earphone 100 .

Further, bosses 1181 may be formed in the accommodating area 118 , and the bosses 1181 are spaced apart from the sidewalls of the accommodating area 118 to form accommodating grooves 1182 surrounding the bosses 1181 . Wherein, the groove width of the accommodating groove 1182 may be less than or equal to 0.3 mm. At this time, the outlet ends of the pressure relief hole 114 and the sound adjustment hole 117 are located at the top of the boss 1181 , that is, the accommodating groove 1182 can surround the pressure relief hole 114 and the sound adjustment hole 117 . Correspondingly, the protective cover 15 may include a main cover plate 151 and an annular side plate 152 , and the annular side plate 152 is connected with the edge of the main cover plate 151 by bending so as to extend laterally of the main cover plate 151 . Wherein, the height of the annular side plate 152 relative to the main cover plate 151 may be between 0.5 mm and 1.0 mm. In this way, when the protective cover 15 is fixed in the accommodating area 118 , the annular side plate 152 can also be inserted into and fixed in the accommodating groove 1182 to improve the connection strength between the protective cover 15 and the movement case 11 . For example, the annular side plate 152 is fixedly connected to the movement case 11 through the glue (not shown in the figure) in the accommodating groove 1182 . Further, the main cover 151 can also be connected to the top of the boss 1181 by welding. The top of the boss 1181 may be slightly lower than the outer surface of the movement case 11 , for example, the level difference between the two is approximately equal to the thickness of the main cover 151 .

Based on the above related descriptions and in conjunction with FIG. 18 and FIG. 2 , the outlet ends of the pressure relief hole 114 and the sound adjustment hole 117 can also be covered with a sound resistance net 1140 and a sound resistance net 1170 respectively, so as to adjust the pressure relief hole 114 and the sound adjustment hole respectively. The effective area of the outlet end of the sound hole 117 further improves the acoustic performance of the earphone 100 . At this time, the acoustic resistance net 1140 and the acoustic resistance net 1170 can be fixed on the top of the boss 1181 through the first annular film 1183 first, and the protective cover 15 can be fixed in the accommodating area 118 subsequently. The first annular film 1183 surrounds the pressure relief hole 114 and the sound adjustment hole 117 to expose the outlet ends of the two. Further, the main cover 151 can also be fixed on the acoustic resistance net 1140 and the acoustic resistance net 1170 through the second annular film 1184 . Wherein, the ring width of the first annular film 1183 and the second annular film 1184 may be between 0.4 mm and 0.5 mm, respectively, and the thickness may be less than or equal to 0.1 mm, respectively. Of course, in some other embodiments, the acoustic resistance net 1140 and the acoustic resistance net 1170 can also be fixed on the protective cover 15 in advance to form a structural assembly, and then the structural assembly is fixed in the accommodating area 118 . For example, the acoustic resistance net 1140 and the acoustic resistance net 1170 are fixed on the same side of the main cover plate 151 by the second annular film 1184, and are surrounded by the annular side plate 152, thereby forming a structural assembly with the protective cover 15. The acoustic resistance net 1140 and the acoustic resistance net 1170 may be at least partially staggered from each other, so as to cover the outlet ends of the adjacent pressure relief holes 114 and sound adjustment holes 117 respectively, and to adapt to the distance between them.

It should be noted that: with reference to FIG. 2 , the end of the sound guide member 14 away from the core housing 11 can also be fixedly provided with a sound resistance net 140 and its corresponding protective cover 15 in the same or similar manner as any of the above-mentioned methods, so as to facilitate The sound resistance net 140 is covered on the outlet end of the sound guide channel 141 and covered by the corresponding protective cover 15 .

Referring to FIGS. 19 and 2 , the coil support 121 may be exposed from the side of the front case 116 in a direction perpendicular to the fastening direction of the rear case 115 and the front case 116 . In other words, with reference to FIG. 4 , for the front housing 116 , the side of the front cylindrical side plate 1162 adjacent to the sound outlet 113 or the sound guide member 14 can be at least partially cut off to form an exposed coil bracket. 121's avoidance area. Further, the sound guide member 14 can be fastened to the exposed part of the coil support 121 and the outer side of the rear housing 115 , so that the sound extraction channel 141 communicates with the sound outlet hole 113 . In this way, the side of the front casing 116 adjacent to the sound guide member 14 does not need to completely wrap the coil bracket 121 , which can not only prevent the core module 10 from being too thick locally, but also does not hinder the sound guide member 14 and the core casing 11 . fixed between.

As an example, the exposed portion of the coil support 121 and the outer side surface of the rear housing 115 may cooperate to form a boss 119 . Wherein, the boss 119 may include a first sub boss portion 1191 located on the rear housing 115 and a second sub boss portion 1192 located on the coil support 121 . At this time, all the sound outlet holes 113 may be provided in the rear housing 115 , and the outlet end of the sound outlet holes 113 may be located on the top of the first sub-boss portion 1191 . Correspondingly, a concave area 142 may be provided on the side of the sound guide member 14 facing the coil support 121 and the rear housing 115 . At this time, the inlet end of the sound guide channel 141 may communicate with the bottom of the recessed area 142 . In this way, when the sound guide member 14 is assembled with the core housing 11 , the boss 119 can be embedded in the recessed area 142 , and the sound outlet channel 141 is communicated with the sound outlet hole 113 . 2, the height of the boss 119 and the depth of the recessed area 142 can satisfy the following relationship: when the top of the boss 119 is in contact with the bottom of the recessed area 142, the end face of the sound guide member 14 and the core shell The body 11 is just in contact, or there is a gap between them, so as to improve the air tightness between the sound guide channel 141 and the sound outlet hole 113 . Based on this, an annular sealing member (not shown in the figure) or the like may also be provided between the top of the boss 119 and the bottom of the recessed area 142 .

Further, one of the rear housing 115 and the sound guide member 14 may be provided with a socket 1154 ; correspondingly, the other may be provided with a socket 143 . Wherein, the socket 143 can be inserted and fixed in the socket 1154 to improve the precision and reliability of the assembly of the sound guide component 14 and the core housing 11 . As an example, the socket 1154 is provided in the rear housing 115 , and can be located in the first sub-boss portion 1191 ; the socket 143 is provided in the sound guide assembly 14 , and can be located in the recessed area 142 .

It should be noted that: with reference to FIG. 19 , the sound guiding component 14 and the core housing 11 can be assembled along the direction shown by the dotted line in FIG. 19 .

In some embodiments, for example, the movement module 10 is not provided with the diaphragm 13 , and the front case 116 can press the coil support 121 on the annular platform 1153 to improve the reliability of the movement module 10 assembly. Specifically, the front housing 116 can press and hold the other end of the second cylindrical support portion 1213 away from the annular main body portion 1211 on the annular platform 1153 .

In some other embodiments, for example, the movement module 10 is provided with the diaphragm 13, and the front case 116 can hold the coil support 121 and the diaphragm 13 connected therewith on the annular platform 1153 together, so as to improve the movement of the movement. Reliability of module 10 assembly. Wherein, the diaphragm 13 may be connected to the other end of the second cylindrical support portion 1213 away from the annular main body portion 1211 through the reinforcing ring 136 thereof. Specifically, the front housing 116 can press and hold the reinforcing ring 136 on the annular bearing platform 1153 through the second cylindrical support portion 1213 .

As an example, referring to FIG. 19 and FIG. 4 , the sound adjustment hole 117 may be provided in the rear case 115 in the form of a complete through hole; and the pressure relief hole 114 may be provided in the front case 116 in the form of an incomplete notch, A complete through hole is formed by splicing and fitting the rear casing 115 and the front casing 116 . In this way, it is convenient to reduce the distance between the adjacent pressure relief holes 114 and the sound adjustment holes 117 , and to make the actual area of the outlet end of the pressure relief holes 114 larger than the actual area of the outlet end of the sound adjustment hole 117 .

Further, with reference to FIGS. 29 and 2 , a communication hole 1215 may be provided at the connection between the annular main body portion 1211 and the first cylindrical support portion 1212 , so that the air in the front cavity 111 does not need to bypass the coil during the discharge process The bracket 121 and the coil 123, etc., but directly pass through the coil bracket 121, which can not only increase the exhaust efficiency of the front cavity 111, but also reduce the wavelength of the standing wave in the front cavity 111, so that the output through the pressure relief hole 114 to the The peak resonance frequency of the air-conducted sound outside the earphone 100 is shifted to high frequencies. Of course, all the communication holes 1215 may be located in the annular main body part 1211 or the first cylindrical bracket part 1212 . Further, the number of the communication holes 1215 may be multiple, and they are arranged at intervals along the circumferential direction of the coil assembly. Wherein, the cross-sectional area of each communication hole 1215 may be greater than or equal to 2 mm ² . As an example, the cross-sectional area of the communication hole 1215 disposed adjacent to the first pressure relief hole 1141 may be greater than or equal to 3 mm ² , and the communication holes disposed adjacent to the second pressure relief hole 1142 and the third pressure relief hole 1143 respectively The cross-sectional area of the hole 1215 may be greater than or equal to 2.5 mm ² .

With reference to FIG. 1 , the earphone 100 may include two core modules 10 , and the two core modules 10 may be located on the left and right sides of the user's head respectively when the headset 100 is in a wearing state. Based on this, and in conjunction with FIG. 20 and FIG. 21 , this embodiment can define: when the earphone 100 is in the wearing state, the left earphone core module is the left earphone core module among the two core modules 10 , which is located on the left side of the user's head. For example, as shown in Figure 20; the right earphone core module is located on the right side of the user's head, for example, as shown in Figure 21. Further, the core module 10 can be provided with other auxiliary components such as function buttons and microphones in addition to the sound-producing-related structural components such as the transducer device 12 to enrich and expand the functions of the earphone 100 . Based on the general usage habits of users, the function buttons can be placed in the left earphone core module, and the microphone can be placed in the right earphone core module. The volume of the function keys and the microphone may be different. Of course, the auxiliary devices may also have other arrangement distributions, for example, a microphone is placed in each of the left ear and right earphone core modules, which will not be listed here.

As an example, with reference to FIG. 20 , the movement module 10 may include function keys 16 disposed in the accommodating cavity of the movement case 11 , and the function keys 16 can be exposed from the rear case 115 so as to receive the user's pressing operate. Wherein, the triggering direction of the function button 16 may be substantially consistent with the vibration direction of the transducer device 12 .

As an example, referring to FIG. 21 , the movement module 10 may include a first microphone 171 disposed in the accommodating cavity of the movement casing 11 , and the first microphone 171 can collect the sound outside the movement module 10 . The included angle between the vibration direction of the first microphone 171 and the vibration direction of the transducer device 12 may be between 65 degrees and 115 degrees. In this way, mechanical resonance of the first microphone 171 with the vibration of the transducer device 12 is avoided, thereby improving the sound pickup effect of the movement module 10 .

Further, the core module 10 may further include a second microphone 172 disposed in the accommodating cavity of the core casing 11 , and the second microphone 172 can collect sounds outside the core module 10 . The included angle between the vibration direction of the second microphone 172 and the vibration direction of the first microphone 171 may be between 65 degrees and 115 degrees. In this way, the second microphone 172 and the first microphone 171 can not only receive two different sounds, but also receive the same sound from two different directions, thereby improving the functions of the headset 100 such as noise reduction and voice calls. Based on this, the headset 100 may further include a processing circuit (not shown in the figure) integrated on the main control circuit board 40, and the processing circuit may use the first microphone 171 as the main microphone, for example, for collecting the user's voice, and the second microphone 171 as the main microphone for the processing circuit. The microphone 172 is an auxiliary microphone, for example, used to collect ambient sound of the environment where the user is located, and perform noise reduction processing on the sound signal collected by the first microphone 171 through the sound signal collected by the second microphone 172 . Wherein, the first microphone 171 and the second microphone 172 can be welded on the same flexible circuit board to simplify the wiring structure of the core module 10 . Preferably, the vibration direction of the first microphone 171 and the vibration direction of the transducer device 12 are perpendicular to each other, and the vibration direction of the second microphone 172 and the vibration direction of the first microphone 171 are perpendicular to each other.

Based on the above related descriptions, the core module 10 may further include a diaphragm 13 connected between the transducer device 12 and the core housing 11 , so that the core module 10 can generate air while generating bone conduction sound. guide sound. Based on this, and in conjunction with FIG. 20 (or FIG. 21 ) and FIG. 2 , the movement module 10 may further include a partition 18 , and the partition 18 is arranged in the rear cavity 112 so as to separate the auxiliary device from the rear cavity 112 , The space where the rear cavity 112 is located is protected from the influence of auxiliary devices as much as possible, so that the wall surrounding the rear cavity 112 can be as smooth and round as possible, thereby improving the acoustic performance of the air conduction sound of the earphone 100 . At this time, the transducer device 12 is located on the side of the partition 18 facing the front cavity 111 .

As an example, the partition 18 may partition the rear cavity 112 into a first sub-rear cavity 1121 disposed close to the front cavity 111 and a second sub-rear cavity 1122 disposed away from the front cavity 111 . The sound-out hole 113 and the sound-adjusting hole 117 can be communicated with the first sub-rear cavity 1121 respectively, and auxiliary devices such as the function button 16 and the second microphone 172 can be arranged in the second sub-rear cavity 1122; and the first microphone 171 can be It is arranged in the first sub-rear cavity 1121 . Based on this, the function button 16 and the second microphone 171 can be respectively fixed between the rear bottom plate 1151 and the corresponding partition plate 18 of the left ear and right earphone core modules. Correspondingly, the first microphone 171 can be fixed in the groove (not marked in the figure) of the rear cylindrical side plate 1152 of the right earphone core module, so as to prevent the transducer device 12 from interacting with the first microphone 171 during the working vibration. A collision occurs, thereby increasing the reliability of the movement module 10 . Wherein, for the left earphone core module, the partition plate 18 can be used to withstand the pressing force exerted by the user on the function keys 16 .

Further, the partition 18 can also be used to adjust the size of the first sub-rear cavity 1121, so that the volume of the first sub-rear cavity 1121 of the left earphone core module and the volume of the first sub-rear cavity 1121 of the right earphone core module same. In this way, the air conduction sound output by the left ear and right earphone core modules respectively tends to be consistent in the frequency response curve, thereby improving the acoustic performance of the earphone 100 .

It should be noted that: subject to force majeure factors such as machining accuracy and assembly accuracy, the volume of the first sub-rear cavity of the left ear and right earphone core modules is the same, which also means that a certain difference between the volumes of the two can be allowed. , such as less than or equal to 10%.

Further, the second sub-rear cavity 1122 may be filled with colloid (not shown in the figure). The filling rate of the colloid in the second sub-rear cavity 1122 may be greater than or equal to 90%, so that the second sub-rear cavity 1122 is as solid as possible. In this way, the second sub-rear cavity 1122 is prevented from being a hollow structure, and acoustic resonance occurs with the first sub-rear cavity 1121 , thereby improving the acoustic performance of the earphone 100 .

As an example, the separator 18 can be made of a light-transmitting material; correspondingly, the colloid to be filled can be a light-curing glue, which can be cured under the action of light. The partition plate 18 can be pre-fixed with the rear case 115 by means of a thermal fusion column. Further, the gap between the side surface of the partition plate 18 and the rear casing 115 can also be filled together with light-curing glue. Similarly, after accommodating the second microphone 172, the groove of the rear cylindrical side plate 1152 can also be filled with light-curing glue or other glues.

Further, with reference to FIG. 20 (or FIG. 21 ) and FIG. 2 , in the vibration direction of the transducer device 12 , the outer end face of the magnetic conductive cover 1221 away from the front cavity 111 and the partition 18 are spaced apart to avoid the two in the transduction The device 12 collided during operation. Not only that, the distance between the central area of the outer end surface of the magnetic conductive cover 1221 and the partition 18 may be greater than the distance between the edge area of the outer end surface of the magnetic conductive cover 1221 and the partition 18, that is, the distance between the first sub-rear cavity 1121 The middle area is more open than its edge area, so as to facilitate the flow of air in the first sub-rear cavity 1121 . Wherein, for the magnetic conductive cover 1221, the central area of the side of the bottom plate 1223 facing the partition plate 18 may be recessed in the direction away from the partition plate 18 to make it an arc surface; and/or, for the partition plate 18, the partition plate The central area of the side of the plate 18 facing the magnetic guide cover 1221 may be recessed toward the direction away from the magnetic guide cover 1221 to make it an arc surface.

Referring to FIG. 22 and FIG. 1 , the ear hook assembly 20 may include a accommodating bin 21 , a bending transition portion 22 and a movement fixing portion 23 . The accommodating bin 21 can be used to accommodate the main control circuit board 40 or the battery 50 , the core fixing portion 23 is used to fix the core module 10 , and the bending transition portion 22 connects the accommodating bin 21 and the core fixing portion 23 . Further, the bending transition portion 22 can be arranged in a bent shape, so that the ear hook assembly 20 can be hung between the user's ear and the head.

As an example, the accommodating bin 21 and the movement fixing portion 23 may be plastic parts respectively, and the bending transition portion 22 may have a built-in elastic metal wire, and the elastic metal wire and the plastic may be integrally connected by a metal insert molding process. Wherein, the surface of the ear-hook assembly 20 may be an elastic covering body, so as to improve the wearing comfort of the earphone 100 .

As an example, the accommodating bin 21 may include a main bin body 211 and a cover plate 212 . 23 , the main compartment body 211 is used to form an accommodating space with one end open (not marked in the figure), and the cover plate 212 can be covered on the open end of the main compartment body 211 . Further, referring to FIG. 24 , the open end of the main cartridge body 211 may be provided with an outer end surface 2111 , an inner side surface 2112 , and a transition surface 2113 connecting the outer end surface 2111 and the inner side surface 2112 obliquely. Wherein, when the cover plate 212 is covered on the open end of the main compartment body 211, the cover plate 212 and at least a part of the transition surface 2113 are spaced apart to form a space between the cover plate 212 and the transition surface 2113 for accommodating the colloid. A glue-containing space 213 . At this time, the cover plate 212 and the main box body 211 can be connected through the glue (not shown in the figure) in the glue holding space 213 . In this way, compared to the related art in which an annular dispensing table substantially perpendicular to the inner side 2112 is disposed between the outer end surface 2111 and the inner side 2112, the present embodiment can satisfy the dispensing requirements while ensuring the main chamber body 211 to the greatest extent. The structural strength of the open end of the main box body 211 is further beneficial to the lightening and thinning of the overall structure of the main box body 211 . Wherein, the wall thickness of the open end of the main bin body 211 may be between 0.6 mm and 1.0 mm. Certainly, in some other embodiments, when the cover plate 212 is covered on the open end of the main compartment body 211, the connection between the cover plate 212 and the outer end surface 2111 can also be achieved by welding. At this time, the open end of the main box body 211 may not need to be provided with the transition surface 2113 .

Further, the transition surface 2113 may be a plane, and may be connected with the outer end surface 2111 and the inner side surface 2112 at an obtuse angle, respectively. Wherein, the obtuse angle (eg θ1 ) between the transition surface 2113 and the outer end surface 2111 may be smaller than the obtuse angle (eg θ2 ) between the transition surface 2113 and the inner side surface 2112 . In this way, while ensuring that the volume of the glue holding space 213 can meet the glue dispensing requirements, the local wall thickness of the open end of the main container body 211 is ensured to the greatest extent, thereby increasing the structural strength of the open end of the main container body 211 . As an example, the obtuse angle between the transition surface 2113 and the outer end surface 2111 may be between 110 degrees and 135 degrees; or, the obtuse angle between the transition surface 2113 and the inner side surface 2112 may be between 135 degrees and 160 degrees. .

It should be noted that the transition surface 2113 may also be provided with a knurled structure to increase the contact area between the transition surface 2113 and the colloid, thereby improving the bonding strength between the cover plate 212 and the main bin body 211 .

As an example, referring to FIGS. 23 and 24 , the cover plate 212 may include a main cover body 2121 and an annular flange 2122 connected with the main cover body 2121 . The main cover body 2121 can be covered on the outer end surface 2111 and contact with the outer end surface 2111 to limit the position; the annular flange 2122 extends into the main compartment body 211 . At this time, the glue containing space 213 may be formed between the transition surface 2113 , the lower surface of the main cover 2121 and the outer surface of the annular flange 2122 . Based on this, the main box body 211 and the cover plate 212 can be assembled in a flip-chip manner. For example, an appropriate amount of glue is dispensed on the lower surface of the main cover body 2121 and the annular convex surface along the circumferential direction of the cover plate 212 through a glue dispenser. Between the outer sides of the edge 2122 , the ear hook assembly 20 is buckled upside down on the cover plate 212 through the main compartment body 211 , so as to prevent the gel from overflowing toward the interior of the main compartment body 211 .

As an example, referring to FIG. 23 , a main control circuit board 40 may be provided in the accommodating compartment 21 , and a switch assembly 41 may be provided on the main control circuit board 40 . The switch assembly 41 may include a first fixing portion 411 , a second fixing portion 412 and a switch body 413 , the second fixing portion 412 may be bent and connected to the first fixing portion 411 , and the switch body 413 may be disposed on the second fixing portion 412 superior. At this time, the first fixing part 411 can be attached to the main surface of the main control circuit board 40, and the two can be welded together; the second fixing part 412 can be attached to the side surface of the main control circuit board 40, and the switch body 413 is located on the side of the second fixing portion 412 away from the main control circuit board 40 .

Further, the main cover body 2121 may be provided with a key hole 2123 , and the key hole 2123 may be surrounded by an annular flange 2122 . Correspondingly, the ear hook assembly 20 may further include a button assembly 24 fixed on the side of the main cover 2121 away from the annular flange 2122 , the button assembly 24 is configured to receive the pressing force applied by the user, and trigger the switch assembly through the button hole 2123 41. At this time, the pressing direction of the button assembly 24 to the switch assembly 41 may be parallel to the main surface of the main control circuit board 40 to avoid deformation of the main control circuit board 40 in a direction perpendicular to its main surface.

As an example, referring to FIG. 22 and FIG. 23 , the side of the main cover 2121 facing away from the annular flange 2122 may be partially recessed toward the annular flange 2122 to form a placement area 2124 , and the button holes 2123 may be disposed in the placement area 2124 Inside. Correspondingly, the key assembly 24 may include soft keys 241 and hard keys 242 connected with the soft keys 241 . The soft keys 241 are arranged in the placement area 2124 and cover the key holes 2123 . At this time, the user presses the hard button 242 to deform the soft button 241 , and generates a stroke inside the accommodating bin 21 under the avoidance of the button hole 2123 , and then acts on the switch body 413 to trigger the switch assembly 41 .

Further, the soft key 241 may include an integrally connected middle raised portion 2411 and an edge connection portion 2412 . The depth of the placement area 2124 is greater than the thickness of the edge connecting portion 2412 and less than the thickness of the middle convex portion 2411 . At this time, the soft key 241 and the cover plate 212 can be integrally connected by a two-color injection molding process. Since the depth of the placement area 2124 is greater than the thickness of the edge connecting portion 2412, glue overflow during the molding process can be avoided. Of course, in some other embodiments, the side of the main cover body 2121 away from the annular flange 2122 may also be provided with an annular bone position surrounding the placement area 2124, and the height of the annular bone position protruding from the main cover body 2121 may be approximately 0.05mm, its ring width can be about 0.2mm, so that it can be used as a retaining wall during the molding process, and can also avoid glue overflow.

As an example, referring to FIG. 23 , the number of the switch assembly 41 , the key hole 2123 and the soft key 241 may be two respectively, and they are respectively arranged in a one-to-one correspondence. Wherein, a blind hole (not marked in the figure) may be provided in the middle convex portion 2411 of each soft key 241 . Correspondingly, the hard key 242 may include a pressing portion 2421 and a post 2422 that are integrally connected. The number of the plugs 2422 can also be two, and each plug 2422 is respectively embedded in a blind hole, and the two can be an interference fit. Based on this, the two switch assemblies 41 can respectively correspond to the volume up button and the volume down button of the earphone 100 , and any one of them can also be extended as the power button of the earphone 100 .

Referring to FIGS. 25 and 26 , the rear hanging assembly 30 may include an elastic wire 31 and a metal connector 32 , and the metal connector 32 can be respectively sleeved and fixed on both ends of the elastic wire 31 . At this time, both ends of the rear hanging assembly 30 can be connected to one end of the ear hanging assembly 20 (eg, the accommodating compartment 21 ) through respective metal connectors 32 . The deformation of the first portion 311 of the elastic wire 31 inside the metal connector 32 may be less than or equal to 10% compared to the second portion 312 of the elastic wire 31 outside the metal connector 32 . In this way, compared with the related art, the two ends of the elastic metal wire are first flattened, and then the plastic connectors are formed by injection molding on the two ends of the elastic metal wire. In this embodiment, the metal connector 32 is used instead of the plastic connector, so that the elastic metal The two ends of the wire 31 do not need to be deformed (or are relatively small), so that the two ends of the elastic metal wire 31 can be prevented from being brittle due to deformation, so as to increase the reliability of the rear hanging assembly 30 . In addition, compared with the plastic connector, the metal connector 32 itself has better structural strength.

It should be noted that: the deformation amount described in this embodiment can be calculated by the following method: |φ1-φ2|/φ2. Wherein, φ1 is the cross-sectional dimension along any direction passing through the geometric center of the cross-section of the first portion 311 , and φ2 is the cross-sectional dimension along the geometric center of the cross-section of the second portion 312 and the same direction as φ1 . For example, if the elastic metal wire 31 is a wire and has not been deformed, φ1 and φ2 correspond to the wire diameters of the first portion 311 and the second portion 312 respectively.

As an example, for the elastic wire 31 , the second part 312 can be arranged in a curved shape compared with the first part 311 , so that the rear hanging assembly 30 can be wound around the back side of the user's head. Further, the material of the elastic metal wire 31 can be spring steel, titanium alloy, titanium-nickel alloy, chromium-molybdenum steel, etc., and the material of the metal connector 32 can be titanium alloy (for example, nickel-titanium alloy, titanium alloy, beta titanium, etc.), Steel alloys (such as stainless steel, carbon steel, iron, etc.), copper alloys (such as red copper, brass, bronze and cupronickel), aluminum alloys, and the like.

In some embodiments, the metal connector 32 may be provided with a mounting hole (not marked in the figure). At this time, the elastic wire 31 can be inserted into the installation hole, and can be connected to the metal connector 32 by welding. 26, the end of the elastic wire 31 can be further exposed from the outer end surface of the metal connector 32, and the welding point between the elastic wire 31 and the metal connector 32 can be formed on the exposed part of the elastic wire 31 and the outer end face of the metal connector 32 . In short, the metal connector 32 is sleeved on the elastic metal wire 31, and the ends of the elastic metal wire 31 can be exposed, and then the ends of the two are welded.

In some other embodiments, the metal connector 32 is connected with the metal connector 32 by means of die casting. Compared with the above-mentioned welding connection, the die-casting connection enables the metal connector 32 to be directly wrapped on the elastic wire 31 , similar to plastic injection molding.

Further, whether it is a welding connection or a die-casting connection, in order to increase the bonding strength between the elastic wire 31 and the metal connector 32, the outer surface of the first part 311 may be provided with a knurled structure (not shown in the figure) to increase the The contact area between the elastic wire 31 and the metal connector 32 . Wherein, the ratio between the depth of the knurled structure and the cross-sectional dimension of the first portion 311 may be less than or equal to 15%. Preferably, the ratio between the depth of the knurled structure and the cross-sectional dimension of the first portion 311 may be less than or equal to 5%. For example: the depth of the knurled structure is between 0.2mm and 0.3mm.

As an example, referring to FIGS. 26 and 27 , the metal connector 32 may be arranged in a column shape, and may have a mounting surface 321 parallel to the axial direction of the metal connector 32 . Wherein, the mounting surface 321 may be arranged in a plane shape and penetrate both ends of the metal connector 32 along the aforementioned axis direction. In this way, since the wire 33 mentioned later is generally a wire, its cross section is generally circular, so that the metal connector 32 can be assembled with the wire 33 through the flat mounting surface 321, which is convenient for setting the wiring of the rear hanging assembly 30. .

Further, the metal connector 32 may also have an anti-rotation surface 322 parallel to the mounting surface 321 . In this way, after the rear hanging assembly 30 is plugged and connected to the ear hanging assembly 20 (eg, the accommodating compartment 21 ) through the metal connector 32 , the two are not easy to rotate relative to each other. The anti-rotation surface 322 only penetrates one end of the metal connector 32 close to the end of the elastic wire 31 along the aforementioned axial direction, so that one end of the metal connector 32 can form a stop flange 323 connected to the anti-rotation surface 322 . In this way, in the process that the rear hanger assembly 30 is connected to the earhook assembly 20 (eg, its accommodating compartment 21 ) through the metal connector 32 , the metal connector 32 can be connected to the earhook assembly 20 through the stop flange 323 . The end face is abutted to limit the position.

Further, the other end of the metal connector 32 away from the stop flange 323 may be provided with a stop slot 324 . Wherein, the stop slots 324 may penetrate through the mounting surface 321 and the anti-rotation surface 322 along one radial direction of the metal connector 32 , and two oppositely disposed along another radial direction of the metal connector 32 . In this way, the metal connector 32 and the earhook assembly 20 (eg, the accommodating compartment 21 ) can form a snap fit, thereby preventing the rear hook assembly 30 from being separated from the earhook assembly 20 after being assembled.

As an example, with reference to FIGS. 28 and 25 , the rear hanging assembly 30 may further include a wire 33 and an elastic covering body 34 . The length of the wire 33 is greater than the length of the elastic metal wire 31 and extends from one end of the elastic metal wire 31 to the other end thereof. Further, the elastic covering body 34 may be made of a softer material (eg, silicone), and may cover the wire 33 , the elastic metal wire 31 and the metal connectors 32 at both ends thereof, so as to improve the wearing comfort of the earphone 100 Spend.

In some embodiments, the elastic covering body 34 may be provided with a threading channel (not marked in the figure), and the elastic metal wire 31 and the wire 33 are passed through the threading channel. In order to facilitate threading, the size of the threading channel is set to allow the elastic wire 31 and the wire 33 to move in the threading channel, for example, the cross-sectional area of the threading channel is greater than the sum of the cross-sectional areas of the elastic wire 31 and the wire 33 .

In some other embodiments, the elastic covering body 34 can cover the wire 33 by injection molding and is provided with a threading channel, and the elastic metal wire 31 is threading in the threading channel. Similarly, to facilitate threading, the threading channel is sized to allow the elastic wire 31 to move within the threading channel, eg, the threading channel has a larger cross-sectional area than the elastic wire 31 .

As an example, referring to FIG. 25 and FIG. 1 , the elastic covering body 34 may include a rear hanging covering part 341 and a cartridge body covering part 342 which are integrally connected. Wherein, the rear hanging covering portion 341 is used for covering the elastic metal wire 31 and the conducting wire 33 , and the housing covering portion 342 is used for at least partially covering the accommodating chamber 21 after the metal connector 32 is plugged and connected to the accommodating chamber 21 . .

Further, the cartridge body cladding portion 342 may at least partially envelop the accommodating compartment 21 , and may include a first cladding portion 3421 close to the metal connector 32 and a second cladding portion 3422 away from the metal connector 32 . The first cladding portion 3421 and the second cladding portion 3422 can be bonded and fixed to the accommodating chamber 21 respectively, and the bonding strength of the second cladding portion 3422 and the accommodating chamber 21 is greater than that of the first cladding portion 3421 and the accommodating chamber 21 . Adhesive strength of the accommodating bin 21 . In this way, using the difference in bonding strength, the relative positions of the covering portion 342 of the box body and the accommodating box 21 can be adjusted during the process of gluing the two, so as to eliminate the assembly error between the two, thereby improving the appearance of the earphone 100 quality. Based on this, the first covering part 3421 can be fixedly connected to the accommodating bin 21 through a first colloid (not shown in the figure), and the second covering part 3422 can be connected to the accommodating chamber 21 through a second colloid (not shown in the figure). The bins 21 are fixedly connected, and the curing speed of the second colloid is higher than that of the first colloid. For example, the first colloid can be silicone glue or other soft glue, and the second colloid can be glue such as instant glue, structural glue, and PUR glue. Wherein, the second colloid may be mainly applied on the end of the second coating portion 3422 away from the first coating portion 3421 to play a pre-fixing role.

Based on the above related descriptions, the accommodating bin 21 can be a plastic part, and the elastic covering body 34 can be a silicone part. Due to the large difference in the materials of the two, it is easy to cause defects such as opening after the two are directly glued. Phenomenon. To this end, referring to FIG. 25 , a transition connecting piece 3423 may be injected inside the second covering part 3422 , and the bonding strength between the transition connecting piece 3423 and the accommodating bin 21 is greater than that between the second covering part 3422 and the accommodating bin 21 . In order to replace the second cladding portion 3422 with the accommodating chamber 21 by adhesive bonding. Wherein, the transition connecting piece 3423 can be a metal part or a plastic part; and when the transition connecting piece 3423 is a plastic part, its material can be the same as that of the accommodating bin 21 .

As an example, referring to FIG. 25 and FIG. 22 , for the cartridge body covering part 342 , the first covering part 3421 may be provided in a sleeve shape, and the second covering part 3422 may be provided in a strip shape. In this way, after the metal connector 32 is connected to the accommodating compartment 21, when the cladding part 342 of the silo body covers the accommodating compartment 21, the first cladding part 3421 can be sleeved on the main compartment body 211 and the cover plate 212. At the periphery, the second covering portion 3422 covers the cover plate 212 and can further cover the matching gap between the cover plate 212 and the main compartment body 211 , so as to increase the waterproof performance of the earphone 100 .

Further, referring to FIG. 25 and FIG. 23 , the second covering portion 3422 may be provided with avoidance holes 3424 corresponding to the button holes 2123 respectively, so that the middle convex portion 2411 of each soft key 241 can pass through the avoidance holes 3424 exposed, and then connected with the hard keys 242 . The edge connecting portion 2412 of each soft key 241 is located between the main cover 212 and the second covering portion 3422 , and the pressing portion 2421 is located on the side of the second covering portion 3422 away from the main cover 212 . In this way, the waterproof performance of the earphone 100 can be increased.

The above descriptions are only part of the embodiments of the present application, and are not intended to limit the protection scope of the present application. Any equivalent device or equivalent process transformation made by using the contents of the description and drawings of the present application, or directly or indirectly applied to other related The technical field is similarly included in the scope of patent protection of this application.

Claims (10)

1. The earphone is characterized by comprising a core module, wherein the core module comprises a core shell, a transduction device and a vibrating diaphragm, the core shell is used for contacting with the skin of a user and forming an accommodating cavity, the transduction device is arranged in the accommodating cavity and connected with the core shell, so that a skin contact area of the core shell generates bone conduction sound under the action of the transduction device, the vibrating diaphragm is connected between the transduction device and the core shell to divide the accommodating cavity into a front cavity close to the skin contact area and a rear cavity far away from the skin contact area, the core shell is provided with a sound outlet communicated with the rear cavity, and the vibrating diaphragm generates air conduction sound transmitted to human ears through the sound outlet in the relative movement process of the transduction device and the core shell;

the core module still includes baffle and auxiliary device, the baffle sets up the back intracavity, transducer is located the baffle orientation one side of antechamber, the baffle will the back chamber is separated into and is close to the first sub-back chamber that the antechamber set up with keep away from the sub-back chamber of second that the antechamber set up, the phonate hole with first sub-back chamber intercommunication, the auxiliary device sets up the sub-back intracavity of second.

2. The earphone according to claim 1, wherein the core module comprises a left earphone core module and a right earphone core module, and the volumes of the first sub-rear cavities of the left earphone core module and the right earphone core module are the same.

3. The earphone according to claim 1, wherein the second sub rear cavity is filled with gel.

4. The earphone according to claim 3, wherein the partition is made of a light-transmitting material, and the glue is a photo-curing glue.

5. The earphone according to claim 2, wherein the transducer comprises a magnetic circuit system including a magnetic conductive cover and a magnet disposed in the magnetic conductive cover, the magnetic conductive cover is spaced apart from the partition plate away from the outer end surface of the front cavity in a vibration direction of the transducer, and a distance between a center region of the outer end surface of the magnetic conductive cover and the partition plate is greater than a distance between an edge region of the outer end surface of the magnetic conductive cover and the partition plate.

6. The earphone according to claim 1, wherein the movement housing is further provided with a pressure relief hole communicated with the front cavity, the pressure relief hole is staggered with the sound outlet hole, an outlet end cover of the pressure relief hole is provided with a first acoustic resistance net, and the porosity of the first acoustic resistance net is greater than or equal to 7%.

7. The earphone according to claim 6, wherein the movement housing is further provided with a tuning hole communicated with the first sub-rear cavity, an outlet end cover of the tuning hole is provided with a second sound blocking net, and the porosity of the second sound blocking net is less than or equal to 16%.

8. The earphone of claim 7, wherein the tuning hole is adjacent to the pressure relief hole and spaced apart by a distance less than or equal to 2mm.

9. The earphone according to claim 8, wherein the movement module further comprises a protective cover, and the protective cover covers the pressure relief hole and the sound adjusting hole and covers the first sound resistance net and the second sound resistance net.

10. The earphone according to claim 1, wherein the core module further comprises a sound guide member connected to the core housing, the sound guide member being provided with a sound guide channel, the sound guide channel communicating with the sound outlet hole and being configured to guide the air-guided sound to the human ear, the sound guide channel having a length of less than or equal to 7mm.

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