CN206820949U - Planar diaphragm speaker and earphone - Google Patents
Planar diaphragm speaker and earphone Download PDFInfo
- Publication number
- CN206820949U CN206820949U CN201720466423.1U CN201720466423U CN206820949U CN 206820949 U CN206820949 U CN 206820949U CN 201720466423 U CN201720466423 U CN 201720466423U CN 206820949 U CN206820949 U CN 206820949U
- Authority
- CN
- China
- Prior art keywords
- magnetic
- group
- magnetic group
- diaphragm
- planar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000003491 array Methods 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims 1
- 230000004907 flux Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000005389 magnetism Effects 0.000 description 15
- 239000011888 foil Substances 0.000 description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 11
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000010408 film Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 230000004044 response Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000010409 thin film Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- DWDGSKGGUZPXMQ-UHFFFAOYSA-N OPPO Chemical compound OPPO DWDGSKGGUZPXMQ-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 230000005686 electrostatic field Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000739 chaotic effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The utility model belongs to speaker technology field, discloses a kind of planar diaphragm speaker and earphone, and the planar diaphragm speaker includes magnetic circuit system and vibrational system；Wherein, vibrational system includes the plane diaphragm and planar voice-coil being bonded to each other；The preceding magnetic group and rear magnetic group, preceding magnetic group and rear magnetic group that magnetic circuit system includes positioned at vibrational system both sides form two-sided unsymmetrical magnetic circuit system；Magnetic circuit system also includes preceding magnetic conduction group and rear magnetic conduction group, and preceding magnetic conduction group is located at preceding magnetic group reverse side；Magnetic conduction group is located at rear magnetic group reverse side afterwards.The utility model uses two-sided magnetic circuit, makes driving force suffered by vibrational system uniform, caused sound is more natural；The magnetic group of vibrational system both sides has corresponding magnetic conduction group to carry out antimagnetic conducting, ensures that the magnetic flux of magnet in the magnetic group of vibrational system both sides maximizes and applies in magnetic field, prevents that magnetic is exposed.
Description
Technical Field
The utility model belongs to the technical field of the speaker, a plane vibrating diaphragm speaker and earphone is related to.
Background
The current earphones are mainly classified into moving coil type earphones, moving iron type earphones and electrostatic (capacitive) type earphones according to different sound production principles.
The moving-coil earphone is the most common earphone type at present, and is characterized in that a coil is fixed on a vibrating diaphragm and is arranged in a fixed magnetic field generated by a permanent magnet, and a signal passes through the coil to cut magnetic lines of force, so that the vibrating diaphragm is driven to vibrate and sound together. The advantages are that: the manufacture is relatively easy, the linearity is good, the distortion is small, and the frequency response is wide; the disadvantages are that: because the area of the moving coil unit in the earphone is large, and more space and air are needed to participate in vibration in the sounding process, the sound leakage phenomenon cannot be effectively controlled.
The moving-iron earphone utilizes the electromagnet to generate an alternating magnetic field, the vibration part is suspended in front of the electromagnet by an iron sheet, and the signal changes the magnetic field of the electromagnet when passing through the electromagnet, so that the iron sheet vibrates to produce sound. The advantages are that: the service life is long, and the efficiency is high; the disadvantages are that: the distortion is large, the frequency response is narrow, and the method is commonly used for early telephone handsets.
The principle of the electrostatic (capacitance) earphone is that the diaphragm is in a changing electric field, the diaphragm is extremely thin and can be accurate to micron level, the diaphragm is polarized by high direct current voltage, and the electric energy required by polarization is converted by alternating current or supplied by a battery. The vibrating diaphragm hangs in the electrostatic field that is formed by two fixed metal sheets (stators), and when audio signal loaded to the stator, the electrostatic field changed, and drive vibrating diaphragm vibration drives the vibrating diaphragm sound production under the drive of electric field force. A single stator may also drive the diaphragm, but in contrast the push-pull form of a double stator is less distorted. Because the vibrating diaphragm is light and thin, the tone quality of the electrostatic earphone is naturally biased to be light and transparent, and the appearance of low frequency and sound is slightly inferior to the sense of density.
In order to obtain better sound quality, a planar diaphragm technology has appeared in the prior art. For example, the popular OPPO PM series magnetic flat-diaphragm earphone in the market, taking the earphone as an example, adopts a flat-diaphragm driving unit, which is superior to the earphone adopting other driving units in most markets. Its sound is produced by balanced vibration through a very thin and light diaphragm, its magnetic field system and wire are symmetrically distributed, and the diaphragm is uniformly driven, so that the earphone can obtain maximum sensitivity and consistency. Due to the stability of the diaphragm and the linear piston vibration, the minimum distortion, the higher consistency and the extremely high analysis force can be ensured. The OPPO PM series earphone has the most unique characteristic that the design of a double-sided spiral pressurization voice coil is applied, and the influence of the vibrating diaphragm caused by physical properties is fully solved. Therefore, the conductor can be utilized by 100%, higher utilization efficiency is achieved, and the coil plane distribution does not generate intermodulation distortion due to the action of the inductance like a moving coil earphone.
However, the inventor finds that the magnetic vibration flat film earphone in the prior art also has certain defects in the process of implementing the invention: typically, the same external volume, the comparison of the actual plane voice coil area between the circle and the square, the square sounding area is 0.5-2 times larger than the actual area of the circle; a hemispherical sound guide device is needed in the center of the circular shell to solve the problem of sound pressure turbulence distortion in the center; the double-sided aluminum foils are required to be connected with the aluminum foils on the two sides of the film in a conduction mode, the aluminum foils on the two sides are made of nanoscale materials and are very thin, the manufacturing process is complex, the reject ratio is high during production, and the single cost is increased.
SUMMERY OF THE UTILITY MODEL
Objects of the invention
To the above-mentioned defect of prior art, the utility model aims to solve the technical problem that: the method can improve the tone quality of the planar diaphragm loudspeaker and the earphone with low cost, and realize low distortion, comprehensive high-frequency response, high resolution and low cost.
(II) technical scheme
In order to solve the above technical problem, the present invention provides a planar diaphragm loudspeaker, which includes a vibration system and a magnetic circuit system; wherein,
the vibration system comprises a plane diaphragm 23 and a plane voice coil 24 which are attached to each other;
the magnetic circuit system comprises a front magnetic group 4 and a rear magnetic group 5 which are positioned at two sides of the vibration system, and the front magnetic group 4 and the rear magnetic group 5 form a double-sided asymmetric magnetic circuit system;
the magnetic circuit system also comprises a front magnetic group 6 and/or a rear magnetic group 7, wherein the front magnetic group 6 is positioned on one side of the back surface of the front magnetic group 4; and/or the rear magnetic conduction group 7 is positioned on one side of the back surface of the rear magnetic group 5.
Preferably, the front magnetic group 6 and/or the rear magnetic group 7 are strip-shaped arrays formed by strip-shaped discrete arrangement, sheet-shaped arrays formed by sheet-shaped discrete arrangement, or complete magnetic conductive sheets, or magnetic conductive sheets formed by splicing a plurality of pieces.
Preferably, the front magnetic group 6 and the front magnetic group 4 are correspondingly arranged, and the widths and the positions of the two groups respectively correspond; and/or the rear magnetic group 7 and the rear magnetic group 5 are correspondingly arranged, and the widths and the positions of the two groups are respectively corresponding.
Preferably, in the flat diaphragm speaker: the whole edge of the front magnetic group 6 is larger than the whole edge of the front magnetic group 4; and/or the whole edge of the rear magnetic conduction group 7 is larger than the whole edge of the rear magnetic group 5.
Preferably, the front magnetic group 4 and the rear magnetic group 5 are strip-shaped array magnetic groups formed by arranging discrete magnetic strips.
Preferably, the sparsity of the front magnetic group 4 strip array is smaller than that of the rear magnetic group 5 strip array.
Preferably, the back magnetic group 4 is a magnetic group proximate to the sound receiver.
Preferably, the strip array magnetic group of the front magnetic group 4 and/or the back magnetic group 5 comprises 3-15 magnetic strips.
Preferably, the strip array magnetic group of the front magnetic group 4 and/or the back magnetic group 5 comprises 6-9 magnetic strips.
Preferably, the strip array magnetic group of the front magnetic group 4 and/or the back magnetic group 5 comprises 7 or 8 magnetic strips.
Preferably, the planar voice coil 24 is a thin film with a circuit layout.
Preferably, the film is a thin film circuit made of a conductive film.
Preferably, the circuit layout is adapted to the shape of the double-sided asymmetric magnetic circuit system.
Preferably, the magnetic circuit system further comprises a front magnetic group support plate 1 and/or a rear magnetic group support plate 3, the front magnetic group 4 and the front magnetic group 6 are mounted in a mounting groove of the front magnetic group support plate 1, and/or the rear magnetic group 5 and the rear magnetic group 7 are mounted in a mounting groove of the rear magnetic group support plate 3, and the front magnetic group support plate 1 and/or the rear magnetic group support plate 3 fix the vibration system.
Preferably, the front magnetic group 6, the front magnetic group support plate 1, the rear magnetic group 7 and the rear magnetic group support plate 3 are all one-time die-cast molded objects.
Preferably, the vibration system further comprises a diaphragm support plate 22 and a conductive rivet 8; wherein,
one side of the diaphragm support plate 22 is attached to the planar diaphragm 23; the conductive rivet 8 penetrates through the diaphragm support plate 22, the planar diaphragm 23 and the planar voice coil 24, so that the planar voice coil 24 is electrically connected through the conductive rivet 8.
The utility model also provides an earphone, it includes above-mentioned arbitrary plane vibrating diaphragm speaker.
(III) advantageous effects
The planar vibrating diaphragm loudspeaker and the earphone adopt a double-sided magnetic circuit, so that the driving force borne by a vibrating system is uniform, and the generated sound is more natural; the magnetic groups on the two sides of the vibration system are provided with corresponding magnetic conduction groups for antimagnetic conduction, so that the magnetic flux of the magnets in the magnetic groups on the two sides of the vibration system is maximally applied to a magnetic field, and the magnets are prevented from being exposed. Furthermore, the magnetic conduction group is formed by one-time die-casting of plastic, so that the structure is simplified in a hidden mode, and meanwhile, the whole loudspeaker structure is reinforced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a cross-sectional structure of a planar diaphragm loudspeaker according to embodiment 1 of the present invention;
FIG. 2 is a front view of FIG. 1;
fig. 3A is an enlarged schematic view of a local structure at a rivet of a sounding diaphragm group in a planar diaphragm loudspeaker according to embodiment 1 of the present invention;
fig. 3B is a top view of a vibration system for showing a circuit structure according to an embodiment of the present invention.
In the figure, 1-front magnetic group support plate; 2-a vibration system; 21-a conductive foil; 22-a diaphragm support plate; 23-a vibrating diaphragm; 24-a planar voice coil; 3-back magnetic group support plate; 4-front magnetic group; 5-rear magnetic group; 6-leading magnetic group; 7-back magnetic conductive group; 8-conductive rivet.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings and examples.
Plane vibrating diaphragm speaker among the prior art, for example OPPO PM series earphone has adopted two-sided spiral pressure boost voice coil loudspeaker voice coil, has realized the planarization of vibrating diaphragm to a certain extent, has reached comparatively reasonable tone quality, but its manufacturing process is complicated, and the yields is low, and actual sound producing effect is also not ideal, and the product has received a great deal of restriction. In order to obtain a distortion factor low, the high frequency response is comprehensive, the analytic dynamic height, with low costs earphone, the utility model discloses embodiment 1 at first provides a plane vibrating diaphragm speaker, and embodiment 2 further provides an earphone, through two-sided magnetic circuit and magnetic conduction subassembly, has obtained the magnetic circuit of saturation in limited space to can promote the tone quality of plane vibrating diaphragm by a wide margin. Specifically, the embodiment of the present invention is as follows.
Example 1
In one embodiment of the present invention, a planar diaphragm speaker includes a vibration system and a magnetic circuit system. Referring to fig. 1 and 2, the vibration system includes a planar diaphragm 23 and a planar voice coil 24 attached to each other; the magnetic circuit system adopts a double-sided magnetic circuit and comprises a front magnetic group 4 and a rear magnetic group 5 which are positioned on two sides of the vibration system, the front magnetic group 4 and the rear magnetic group 5 form a double-sided asymmetric magnetic circuit system, and the front magnetic group 4 and the rear magnetic group 5 are asymmetric with respect to the vibration system. The magnetic circuit system also comprises a front magnetic group 6 and/or a rear magnetic group 7, wherein the front magnetic group 6 is positioned on one side of the back surface of the front magnetic group 4 and is used for antimagnetic conduction; and/or the rear magnetic conduction group 7 is positioned on one side of the back surface of the rear magnetic group 5 and performs antimagnetic conduction. The embodiment of the utility model provides an in plane vibrating diaphragm speaker, through the vibration system input audio current that changes produces the electromagnetic field, is in afterwards up-and-down motion in the effect of magnetic force of magnetic circuit produces sound signal.
In the embodiment of the present invention, the front magnetic assembly 4 and the rear magnetic assembly 5 are strip-shaped array magnetic assemblies formed by discrete magnetic strips. Compared with the whole magnetic plate, the volume of the magnetic strip is smaller, the manufacturing process is simple, the magnetizing difficulty is low, the magnetized magnetism is more uniform and controllable, the yield is high, secondary processing of an opening is not needed, the production difficulty and the cost of the product can be greatly reduced, large-scale batch production is realized, and the popularization of the plane diaphragm equipment is promoted.
Optionally, the double-sided strip array magnetic groups are set to be asymmetric magnetic circuits through magnetic strips with different widths. Specifically, the sparsity of the strip array of the front magnetic group 4 is smaller than that of the strip array of the rear magnetic group 5, that is, the gap between the magnetic strips in the front magnetic group is smaller than that of the magnetic strips in the rear magnetic group, and it is shown in fig. 1 that the width of the magnetic strips in the front magnetic group 4 is larger than that of the magnetic strips in the rear magnetic group 5. Preferably, the back magnetic group is a magnetic group proximate to a sound receiver, typically such as a human ear. By adopting the mode of the asymmetric magnetic circuit, on one hand, ideal magnetic line distribution can be obtained, and the voice coil diaphragm can be better driven to sound; on the other hand, the sound emitting side is shielded less, so that the influence of a magnetic circuit on sound wave propagation is reduced, and the sound emitting effect can be further improved.
Optionally, the front magnetic group 4 and the rear magnetic group 5 can be formed by arranging 3-15 magnetic strips, and the magnetic strips can be rectangular strip-shaped magnetic strips; preferably 6-9, and 7 or 8 are the best, and the win-win effect of low cost and saturated double-sided magnetic circuit is obtained under the environment of the loudspeaker used by the earphone with the conventional size.
In this embodiment, the front magnetic group 6 and/or the rear magnetic group 7 may be a strip array formed by separately arranging strips, or a sheet array formed by separately arranging sheets, or a complete magnetic conductive sheet, or a plurality of magnetic conductive sheets formed by splicing; the front magnetic group 6 and/or the rear magnetic group 7 are/is made of one or more of metal, alloy, silicon, carbon, graphite, graphene, ceramic and composite materials, so that the front magnetic group 4 and/or the rear magnetic group 5 are/is prevented from being magnetically conducted, the magnetic flux of the magnets in the front magnetic group 4 and/or the rear magnetic group 5 is maximally applied to a magnetic field, and the magnets are prevented from being exposed. Preferably, the material of the front magnetic group 6 and/or the rear magnetic group 7 is iron.
On this basis, in order to further reduce the cost, preferably, the front magnetic group 6 and/or the rear magnetic group 7 are strip-shaped arrays formed by separately arranging strips, and the front magnetic group 6 and the front magnetic group 4 are arranged correspondingly, that is, the widths and the positions of the magnetic strips of the front magnetic group 6 and the front magnetic group 4 correspond; and correspondingly arranging the rear magnetic conduction group 7 and the rear magnetic group 5, namely, the widths and the positions of the magnetic conduction strips of the rear magnetic conduction group 7 and the magnetic strips of the rear magnetic group 5 correspond. Generally, in the magnetic conductive set made of iron, the magnetic conductive strip of the front magnetic set 6 and the magnetic strip of the front magnetic set 4, and the magnetic conductive strip of the rear magnetic set 7 and the magnetic strip of the rear magnetic set 5 adhere to each other by the action of magnetic force.
Furthermore, optionally, in the planar diaphragm loudspeaker, the edge of the front magnetic group 6 is larger than the edge of the front magnetic group 4; and/or the whole edge of the rear magnetic conduction group 7 is larger than the whole edge of the rear magnetic group 5. Through the front/rear magnetic conduction groups with slightly larger edges, the front/rear magnetic conduction groups can be wrapped to a certain degree, so that the magnetic flux is further locked, the magnetic flux leakage is prevented, and a saturated magnetic circuit is ensured to be obtained.
Magnetic circuit still includes preceding magnetism group backup pad 1 and/or back magnetism group backup pad 3, mounting groove is seted up respectively to preceding magnetism group backup pad 1 and back magnetism group backup pad 3, preceding magnetism group 4 and preceding magnetism group 6 are installed in the mounting groove of preceding magnetism group backup pad 1, back magnetism group 5 and back magnetism group 7 are installed in the mounting groove of back magnetism group backup pad 3, preceding magnetism group backup pad 1 and/or back magnetism group backup pad 3 are used for fixed vibration system (for example fixed through the centre gripping), realize magnetic circuit and vibration system's structure equipment.
In order to realize the light weight of the whole loudspeaker, the front magnetic group supporting plate 1 and the rear magnetic group supporting plate 3 are made of plastic or aluminum, and array holes are formed in the front magnetic group supporting plate 1 and the rear magnetic group supporting plate 3 and used for transmitting sound and reducing weight.
Preceding magnetic unit 6 and preceding magnetic unit backup pad 1, back magnetic conduction group 7 and back magnetic unit backup pad 3 are respectively through plastic one-time die-casting shaping, and the hidden structure of having retrencied plays reinforced structure's effect simultaneously again.
Referring to fig. 3A, the vibration system includes a flat diaphragm 23 and a flat voice coil 24 uniformly arranged on one side surface of the diaphragm 23. Among them, the planar voice coil 24 is preferably a thin film with a certain circuit layout, such as a thin film circuit made of a conductive thin film; furthermore, optionally, the circuit layout (width, gap, winding and winding pattern of the circuit, etc.) in the planar voice coil is adapted to the strip-like array of double-sided magnetic circuits. In the embodiment of the present invention, when the voice frequency current varying to the planar voice coil 24 is inputted, the circuit thereof will generate a varying electromagnetic field, thereby moving up and down in the magnetic force of the magnetic circuit system to drive the vibrating diaphragm 23 to vibrate to generate the sound signal.
Further, the vibration system further includes: vibrating diaphragm backup pad 22, vibrating diaphragm 23 opposite side surface are attached in vibrating diaphragm backup pad 22 one side to realize the support to vibrating diaphragm 23 through vibrating diaphragm backup pad 22, ensure vibrating diaphragm 23's roughness.
The vibration system further includes: the conductive rivet 8, wherein, the vibrating diaphragm support plate 22, the vibrating diaphragm 23, the plane voice coil 24 are arranged in a stacked manner to form a plane vibrating diaphragm group, through holes are opened on the plane vibrating diaphragm group, the conductive rivet 8 passes through the through holes on the plane vibrating diaphragm group to realize the power connection of the plane voice coil 24, and the compact layout of the internal structure is realized. Preferably, the vibration system further comprises a conductive foil 21 arranged on the other side of the diaphragm support plate 22 to ensure a good electrical connection of the conductive rivet 8 and/or a good input of electrical power.
The diaphragm support plate 22 and the conductive foil 21 together form a structure similar to a Printed Circuit Board (PCB), that is, the conductive foil 21 is a Circuit layer Printed on the diaphragm support plate 22, and an external power source is connected to the Circuit layer, so that power is supplied to the planar voice coil 24 from the outside. Specifically, referring to fig. 3B, at the through hole of the conductive rivet 8, a circuit line formed by the conductive foil 21 is printed on the diaphragm support plate 22, so that the conductive foil 21 is electrically connected to the planar voice coil 24 through the conductive rivet 8.
Optionally, the conductive film, the conductive rivet 8 and the conductive foil 21 in the planar voice coil 24 are made of one or more of metal, alloy and composite conductive material. As a preferred example, the conductive film is an aluminum foil, the conductive rivet is a copper rivet 8, and the conductive foil 21 is a copper foil. Of course, those skilled in the art will appreciate that the foregoing preferred examples are not to be considered as limiting the invention to the specific embodiments described.
In this embodiment, the planar voice coils 24 are uniformly arranged on the surface of one side of the diaphragm 23, and compared with the mode that two sides of the diaphragm are provided with the double-sided aluminum foils in the prior art, the driving force is uniformly stressed, the generated sound is more natural, the manufacturing process is simplified, the yield is improved, and the cost is reduced.
According to the technical scheme, the planar diaphragm and the double-sided asymmetric strip array magnetic group are adopted, so that the sound production efficiency and the sound quality of the planar diaphragm are improved; by arranging the compact vibration system and the magnetic circuit system, the complex mounting structure is effectively integrated, and the assembly procedures are reduced by 30-50%; by adopting the improved arrangement mode of the planar voice coil, the sensitivity and the sound pressure level of sound production are greatly improved.
The loudspeaker of the embodiment can achieve the sound quality of a real fever level and can easily surpass the existing moving coil loudspeaker, for example: the distortion factor of the moving coil loudspeaker is high, and is 2% -3%, and the distortion factor of the plane vibrating diaphragm loudspeaker in the embodiment is reduced to 0.1% -1%; the high-frequency response of the moving coil loudspeaker is incomplete, 15-35K, and the generation bandwidth of the planar diaphragm loudspeaker is improved to 5-50K; when the working power of the resolution power of the moving coil loudspeaker exceeds more than 60%, the resolution power begins to be reduced, the sound is chaotic, the load is larger and more serious, the planar diaphragm loudspeaker can stably work in the whole full-load range, and the resolution power is higher than that of the moving coil loudspeaker by more than 50%.
Example 2
Based on the planar diaphragm loudspeaker with the equal-magnetic-field asymmetric magnetic circuit provided in embodiment 1, the present embodiment provides an earphone, which includes the planar diaphragm loudspeaker and the related shell structure described in embodiment 1, and achieves an earphone with low distortion, comprehensive high-frequency response, high resolution, and low cost, and meets the requirement of a "fever earphone" in the true sense. Optionally, the embodiment of the present invention provides an earphone that can be any one of a head-mount type, an ear-mount type, a rear-mount type, an ear-plug type, or an in-ear type, and the speaker unit can be designed to have a corresponding size as required. Certainly, because of the existence of two-sided magnetism group and two-sided magnetism group of leading, magnetic circuit's actual weight can receive certain influence, for travelling comfort and the fastness that promotes to wear, preferably adopts headphone to set up the utility model discloses the speaker subassembly of embodiment.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (10)
1. A plane diaphragm loudspeaker is characterized by comprising a vibration system and a magnetic circuit system; wherein,
the vibration system comprises a plane diaphragm (23) and a plane voice coil (24) which are attached to each other;
the magnetic circuit system comprises a front magnetic group (4) and a rear magnetic group (5) which are positioned on two sides of the vibration system, and the front magnetic group (4) and the rear magnetic group (5) form a double-sided asymmetric magnetic circuit system;
the magnetic circuit system further comprises a front magnetic group (6) and/or a rear magnetic group (7), and the front magnetic group (6) is positioned on one side of the back surface of the front magnetic group (4); and/or the back magnetic group (7) is positioned on one side of the back surface of the back magnetic group (5).
2. The planar diaphragm loudspeaker according to claim 1, wherein the front magnetic group (6) and/or the rear magnetic group (7) are strip-shaped arrays formed by strip-shaped discrete arrangement, sheet-shaped arrays formed by sheet-shaped discrete arrangement, complete magnetic conductive sheets, or magnetic conductive sheets formed by splicing a plurality of pieces.
3. The flat diaphragm loudspeaker of claim 1, wherein the front magnetic group (6) and the front magnetic group (4) are arranged correspondingly, and the widths and the positions of the two groups respectively correspond; and/or the back magnetic group (7) and the back magnetic group (5) are correspondingly arranged, and the widths and the positions of the two groups respectively correspond.
4. The flat diaphragm loudspeaker of claim 1, wherein:
the whole edge of the front magnetic group (6) is larger than the whole edge of the front magnetic group (4); and/or
The edge of the whole rear magnetic group (7) is larger than the edge of the whole rear magnetic group (5).
5. The planar diaphragm loudspeaker of claim 1, wherein the front magnetic group (4) and the rear magnetic group (5) are strip array magnetic groups formed by a discrete arrangement of magnetic strips.
6. The planar diaphragm loudspeaker of claim 5 wherein the sparsity of the strip array of the front magnetic group (4) is less than the sparsity of the strip array of the back magnetic group (5).
7. The flat diaphragm loudspeaker of claim 6, in which the back magnet set (4) is the magnet set proximate to the sound receiver.
8. The flat-diaphragm loudspeaker of claim 1, wherein the planar voice coil (24) is a membrane with a circuit layout.
9. The flat-diaphragm loudspeaker of claim 8, wherein said circuit layout conforms to the shape of said double-sided asymmetric magnetic circuit system.
10. An earphone, characterized by comprising the flat diaphragm speaker of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720466423.1U CN206820949U (en) | 2017-04-28 | 2017-04-28 | Planar diaphragm speaker and earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720466423.1U CN206820949U (en) | 2017-04-28 | 2017-04-28 | Planar diaphragm speaker and earphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206820949U true CN206820949U (en) | 2017-12-29 |
Family
ID=60754605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720466423.1U Active CN206820949U (en) | 2017-04-28 | 2017-04-28 | Planar diaphragm speaker and earphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206820949U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040837A (en) * | 2017-04-28 | 2017-08-11 | 北京欧意智能科技有限公司 | Planar diaphragm speaker and earphone |
-
2017
- 2017-04-28 CN CN201720466423.1U patent/CN206820949U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040837A (en) * | 2017-04-28 | 2017-08-11 | 北京欧意智能科技有限公司 | Planar diaphragm speaker and earphone |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203942644U (en) | Acoustic transducer | |
| CN107426652A (en) | Planar diaphragm speaker and earphone | |
| JP7240688B2 (en) | Multiple engine array system and speakers | |
| KR20080112166A (en) | High efficiency compact electro-acoustic transducer with reduced size | |
| CN209572154U (en) | Small Planar Diaphragm Speakers and Headphones | |
| CN109451403B (en) | Vibration diaphragm structure of transducer of miniature flat-panel loudspeaker and loudspeaker with vibration diaphragm of transducer | |
| CN214381372U (en) | Speaker and electronic apparatus | |
| CN214381371U (en) | Speaker and electronic apparatus | |
| WO2022068081A1 (en) | Sound generator, and electronic product comprising same | |
| WO2020038228A1 (en) | Multipole engine array system and loudspeaker | |
| CN111385721A (en) | Planar coil diaphragm loudspeaker and application thereof | |
| CN206820948U (en) | Planar diaphragm speaker and earphone | |
| CN107172543A (en) | Planar diaphragm speaker and earphone | |
| CN206963023U (en) | Planar diaphragm speaker and earphone | |
| CN206413176U (en) | Dual Driver Raceway Speakers | |
| CN101365255A (en) | Loudspeaker | |
| CN107040837A (en) | Planar diaphragm speaker and earphone | |
| CN206820949U (en) | Planar diaphragm speaker and earphone | |
| CN111065022A (en) | Plane diaphragm loudspeaker of asynchronous magnetic reflux structure | |
| CN214256597U (en) | Planar coil vibrating diaphragm, loudspeaker and electronic equipment | |
| CN1111896A (en) | Method for improving property of loudspeaker and double magnetic field double push-pull loudspeaker | |
| WO2022068082A1 (en) | Sound-emitting device and electronic product comprising sound-emitting device | |
| CN116349247A (en) | Flat speaker driven by a single permanent magnet and one or more voice coils | |
| CN211089955U (en) | Sound production device | |
| CN209748803U (en) | Equal magnetic loudspeaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |