RU2802594C1 - Headphones - Google Patents

Abstract

FIELD: sound reproduction devices.

SUBSTANCE: earpiece includes a core module including a core case and a core. The core body has a bottom wall and an annular peripheral wall, and when the user wears an earphone, the bottom wall faces the user's head, one end of the annular peripheral wall is integrally connected to the bottom wall, the other end of the annular peripheral wall, remote from the bottom wall, forms a hole, and the core is inserted into the core body through the hole. The core includes a magnet configured so that the core module can be attached to a magnetic object through one side of the bottom wall, whereas the earphone comprises two core modules, and the magnets of the two core modules have different polarities on the side facing the bottom wall of the core case, so that when the earpiece is not worn, the two core modules are attracted to each other.

EFFECT: providing the possibility of sound reproduction through bone and/or air conductivity.

9 cl, 29 dwg

Description

Field of technology to which the invention relates

The present invention relates to the technical field of acoustics and, in particular, to headphones.

Prior Art

With the development of acoustic output technology, acoustic output device such as earphone is widely used. Compared to traditional in-ear and over-ear headphones, open-back headphones are designed as a portable acoustic output device that provides sound conduction within a certain range without blocking or covering the ear canal. Taking bone conduction headphones as an example, bone conduction is the way sound is conducted. That is, electrical signals are converted into mechanical vibrations. Mechanical vibrations are transmitted through the skull, bone labyrinth, endolymph, spiral organ, cochlear nerve, auditory pathway in the human cerebral cortex, etc. The bone conduction earphone can receive sound using bone conduction. Bone conduction headphones can be placed close to the skull. Sound waves can be transmitted directly to the auditory nerve through the bones, without passing through the external auditory canal and eardrum, allowing both ears to be “freed.”

Disclosure of the invention

In one aspect of the present invention, an earphone is provided. The earphone may include a core module. The core module may include a core body and a core. The core body may include a bottom wall and an annular peripheral wall. When the user wears the earphone, the bottom wall can face the user's head, one end of the annular peripheral wall can be integrally connected to the bottom wall, the other end of the annular peripheral wall distant from the bottom wall can form a hole, and the core can be installed in the core body through the said hole. The core may include a magnet configured such that the core module can be attached to a magnetic object through one side of the bottom wall.

In some embodiments, the magnet may be a cylinder, wherein the diameter of the magnet may be greater than or equal to the first diameter and less than or equal to the second diameter, and the thickness of the magnet may be greater than or equal to the first thickness and less than or equal to the second thickness.

In some embodiments, the magnet diameter may be 10.8 mm and the thickness may be 3.5 mm.

In some embodiments, the core may further include a magnetic shield, a magnetic conductive plate, and a coil. The magnetic shield may include a bottom plate and an annular side plate integrally coupled to the bottom plate, and a magnet may be housed in the annular side plate and secured to the bottom plate. The magnetic conductive plate may be attached to one side of the magnet facing away from the bottom plate. The coil may be located in a magnetic gap between the magnet and the annular side plate.

In some embodiments, the diameter of the magnetic conductive plate may be equal to the diameter of the magnet, and the thickness of the magnetic conductive plate may be equal to the thickness of the magnetic shield.

In some embodiments, the thickness of the magnetically conductive shield may be greater than or equal to the third thickness and less than or equal to the fourth thickness.

In some embodiments of the invention, the thickness of the magnetically conductive shield may be 0.5 mm.

In some embodiments, the height of the annular side plate may be greater than or equal to the first height and less than or equal to the second height.

In some embodiments, the height of the annular side plate may be 3.7 mm.

In some embodiments, the core module may further include a core bracket. The core bracket may be located in the core body, and the coil may be mounted on the core bracket.

In some embodiments, the magnetic gap between the magnet and the annular side plate may be greater than or equal to the first gap and less than or equal to the second gap.

In some embodiments, the earpiece may further include an ear hook assembly, and one end of the ear hook assembly may be coupled to the core module.

In some embodiments, the ear hook assembly may include an ear hook body. The ear hook body may include a housing container, an attachment portion, and a curved transition portion. The housing container may be configured to accommodate a battery or a main control circuit board. The attachment portion may cover the open end of the core body to form a core housing chamber. The curved transition portion may connect the housing container and the attachment portion and may be curved for hanging on the outside of the user's ear.

In some embodiments, the modulus of elasticity of the core body may be greater than the modulus of elasticity of the ear hook body.

In some embodiments, the attachment portion may be provided with a reinforcing structure, wherein the ratio of the difference between the stiffness of the bottom wall and the stiffness of the attachment portion to the stiffness of the bottom wall may be less than or equal to a predetermined ratio threshold.

In some embodiments, the reinforcing structure may be a stiffener located at the attachment site.

In some embodiments, the reinforcing structure material may include a metal piece. The reinforcing structure and the earphone mounting area can be formed as a single element by injection molding a metal insert.

In some embodiments, the core module may further include a cover. The cover may cover an opening of the annular peripheral wall of the core body, and the attachment portion may cover the side of the cover facing away from the core body.

In some embodiments, the modulus of elasticity of the cover may be greater than the modulus of elasticity of the ear hook body.

In some embodiments, the elastic modulus of the cover may be less than or equal to the elastic modulus of the core body.

In some embodiments, the ear hook assembly may further include a decorative bracket. A first groove may be located on the curved transition section. The decorative bracket may be inserted and secured into the first groove to form a wire channel such that a wire extends from the core module into the housing container through said wire channel.

In some embodiments, a button adaptation hole may be located at the earpiece mounting portion, and the button adaptation hole may communicate with one end of the first groove. The ear hook assembly may further include a button, wherein the button may be located on another side of the ear hook body facing away from the decorative bracket and protruding through the button adaptation hole.

In some embodiments, the decorative bracket may extend in a cantilever manner to the top of the button and may actuate the button when external force is applied to it, wherein the button may protrude through the button adaptation hole.

In some embodiments, the earphone may include two core modules. The magnets of the two core modules may have different polarities on the side facing the bottom wall of the core module body, so when the headphones are not put on, the two core modules may be attracted to each other.

In some embodiments, the earpiece may include two ear hook assemblies and a back hook assembly configured to surround the user's head from behind. The two ends of the rear hook assembly may be respectively connected to containers to accommodate two ear hook assemblies.

Additional features will be set forth in part in the description that follows and will become apparent to those skilled in the art upon examination of the following contents and drawings, or may be learned during actual manufacture or use. The features of the present invention can be implemented and obtained by practicing or using various aspects of the methods, tools and combinations set forth in the following detailed embodiments.

Brief description of drawings

The present invention is further described by way of examples of its embodiments. These exemplary embodiments are described in detail with reference to the accompanying drawings. The exemplary embodiments described are non-limiting exemplary embodiments in which like structures are designated by like reference numerals in different drawings and in which:

in Fig. 1 is a schematic structural view of bone conduction headphones in some embodiments of the present invention;

in Fig. 2 is a schematic structural decomposition view of the ear hook assembly of the bone conduction headphones shown in FIG. 1, in some embodiments of the present invention;

in Fig. 3 is a schematic view of the structure of the ear hook body of the ear hook assembly shown in FIG. 2, in some embodiments of the present invention;

in Fig. 4 is a schematic structural decomposition view of the ear hook assembly of the bone conduction headphones shown in FIG. 1, in some embodiments of the present invention;

in Fig. 5 is a schematic view of the structure of the ear hook body of the ear hook assembly shown in FIG. 4, in some embodiments of the present invention;

in Fig. 6 is a schematic view of the structure of the side of the decorative bracket facing the body of the ear hook shown in FIG. 4, in some embodiments of the present invention;

in Fig. 7 is a schematic illustration of the button actuation mechanism of the decorative bracket shown in FIG. 4, in some embodiments of the present invention;

in Fig. 8 is a schematic view of the structural decomposition of the core module shown in FIG. 1, in some embodiments of the present invention;

in Fig. 9 shows the frequency response curve of a bone conduction earphone in some embodiments of the present invention;

in Fig. 10 is a schematic cross-sectional view of the reinforcement structure disposed on the body of the ear hook shown in FIG. 8, in some embodiments of the present invention;

in Fig. 11 is a schematic top view of the reinforcement structure disposed on the body of the ear hook shown in FIG. 8, in some embodiments of the present invention;

in Fig. 12 shows frequency response curves of the plurality of reinforcement structures shown in FIG. 10 and 11, in some embodiments of the present invention;

in Fig. 13 is a schematic cross-sectional view of the assembled core module shown in FIG. 8, along the I-I direction in some embodiments of the present invention;

in Fig. 14 is a schematic view of the structure of the core bracket shown in FIG. 8, in some embodiments of the present invention;

in Fig. 15 is a schematic top view of the structure of the assembled core module shown in FIG. 8, in some embodiments of the present invention;

in Fig. 16 is a schematic view of the structural decomposition of the core module shown in FIG. 1, in some embodiments of the present invention;

in Fig. 17 shows frequency response curves of structures corresponding to a variety of types of adhesives used between the ear hook assembly and the cap shown in FIG. 16, in some embodiments of the present invention;

in Fig. 18 is a schematic cross-sectional view of the assembled core module shown in FIG. 16, along the II-II direction in some embodiments of the present invention;

in Fig. 19 is a schematic view of the structure of the cover side facing the core body shown in FIG. 16, in some embodiments of the present invention;

in Fig. 20 is a schematic top view of the cover shown in FIG. 19, in some embodiments of the present invention;

in Fig. 21 is a schematic view of the structural decomposition of the core module shown in FIG. 16, from a different angle in some embodiments of the present invention;

in Fig. 22 is a schematic top view of the cover shown in FIG. 21, in some embodiments of the present invention;

in Fig. 23 is a schematic view of a core in some embodiments of the present invention;

in Fig. 24 is a graph illustrating the relationship between the force coefficient BL and the magnet shown in FIG. 23, in some embodiments of the present invention;

in Fig. 25 is a graph illustrating the relationship between the thickness of the magnetic conductive screen and the magnetic conductive plate shown in FIG. 23, and the force coefficient BL in some embodiments of the present invention;

in Fig. 26 is a graph illustrating the relationship between the height of the magnetic shield shown in FIG. 23, and the force coefficient BL in some embodiments of the present invention;

in Fig. 27 schematically shows the position of the bone conduction headphones shown in FIG. 1, in the unworn state in some embodiments of the present invention; And

in Fig. 28 is a schematic cross-sectional view of the rear hook assembly shown in FIG. 1, along the III-III direction in some embodiments of the present invention.

in Fig. 29 is a flow diagram illustrating an exemplary method of manufacturing a rear hook assembly in some embodiments of the present invention.

Carrying out the invention

To illustrate the technical solutions related to the embodiments of the present invention, the following is a brief description of the drawings used in describing the embodiments of the invention. It will be appreciated that the drawings described below are only some examples or embodiments of the present invention. Those skilled in the art, without further creative effort, can apply the present invention to other similar scenarios in accordance with these drawings. It should be understood that the example embodiments are provided only to better understand and apply the present invention to those skilled in the art and are not intended to limit the scope of the present invention. Unless the context clearly indicates otherwise or the context illustrates otherwise, the same reference number in different drawings refers to the same structure or operation.

As used in the specification and the accompanying claims, the singular number also includes the plural unless the context clearly indicates otherwise. In general, the terms “comprise,” “consist,” “include,” and/or “including” as used in this disclosure indicate the presence of specified features, integers, steps, operations, elements, and/or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof. The term "based on" means "based at least in part on." The term "one embodiment" means "at least one embodiment". The term “another embodiment” means “at least one other embodiment.” Other terms will be defined as appropriate in the description below. Without loss of generality, the description of an “acoustic output device” or “earphone” will be used later in this disclosure when describing conduction-related technology. This description is a description of only one form of application of conductivity, and for those skilled in the art, "acoustic output device" or "earphone" may also be replaced by other similar words such as "speaker", "sound generating device", "hearing aid" or "acoustic device", etc. In fact, various embodiments of the present invention can be easily applied to other hearing devices that do not use a loudspeaker. For example, those skilled in the art, after understanding the basic operating principle of an earphone, can make various modifications and changes to the shape and details of specific methods and steps of implementing the earphone without departing from that principle. Specifically, ambient sound reception and processing capabilities are added to the earpiece so that the earpiece can function as a hearing aid. For example, a microphone, such as a microphone, can pick up sound from the user/wearer's environment, and the sound is processed using a specific algorithm (or an electrical signal is generated) and transmitted to an acoustic output device. That is, the headphones can be modified to add an ambient sound pickup function, and after certain signal processing, the sound can be transmitted to the user/wearer through an acoustic output module to realize the function of an acoustic output device and a traditional acoustic output device at the same time. By way of example, algorithms mentioned herein may include noise reduction, automatic gain control, acoustic feedback suppression, wide dynamic range compression, active environment recognition, active noise reduction, directional processing, tinnitus processing, multi-channel wide dynamic range compression, active whistling suppression, volume control or the like, or any combination thereof.

The earphone in the present invention may be a separate ready-to-use earphone or an earphone that is connected to or used as part of an electronic device. By way of example only, a bone conduction earphone device will be described below. It should be noted that the following contents also apply to air conduction headphones.

In FIG. 1 shows a schematic structural breakdown of bone conduction headphones 10 in some embodiments of the present invention. In FIG. 2 is a schematic structural decomposition view of the ear hook assembly 30 of the bone conduction headphones 10 shown in FIG. 1, in some embodiments of the present invention. In FIG. 3 is a schematic view of the structure of the ear hook body 31 of the ear hook assembly 30 shown in FIG. 2, in some embodiments of the present invention. In FIG. 4 is a schematic structural decomposition view of the ear hook assembly 30 of the bone conduction headphones 10 shown in FIG. 1, in some embodiments of the present invention. In FIG. 5 is a schematic view of the structure of the ear hook body of the ear hook assembly shown in FIG. 4, in some embodiments of the present invention. As shown in FIG. 1-5, bone conduction headphones 10 may include two core modules 20, two ear hook assemblies 30, a back hook assembly 40, a main control circuit board 50, and a battery 60. In some embodiments, one end of each of two ear hook assemblies 30 hooks can be connected to the corresponding core module 20. Each of the two ends of the rear hook assembly 40 may be connected to the other end of one of the two ear hook assemblies 30 remote from the core module 20. In some embodiments, each of the two ear hook assemblies 30 may be configured to be suspended from the outside of the user's ear. The back hook assembly 40 may be configured to be positioned around the periphery of the rear side of the user's head to meet the requirements for the user to wear the bone conduction headphones 10. Thus, when the user wears the bone conduction headphones 10, the two core modules 20 may be positioned on the left and right sides of the user's head, respectively. Under the influence of the two ear hook units 30 and the back hook unit 40, the two core modules 20 can be in contact with the user's skin, pinching the user's head to transmit sound based on bone conduction.

It should be noted that the present disclosure describes two core modules 20, and both core modules 20 can emit sound such that the bone conduction headphones 10 can provide a stereo effect, thereby improving the user's favorable experience of the bone conduction headphones 10. In some embodiments, the number of core modules 20 may not be limited to two. For example, bone conduction headphones 10 may include three or more core modules 20. As another example, in some application scenarios where stereophonic requirements are not particularly high, such as hearing aids for hearing-impaired patients, a teleprompter for live broadcasters, etc., bone conduction headphones 10 may comprise only one core module 20 . As another example, the headphones may further be an air conduction earphone (for example, a single-ear air conduction earphone) provided with a core module 20, and the air conduction earphone can be suspended from the user's ear pinna by a fixing component (for example, by a node ear hook) and transmit the sound signal to the user through one or more sound conducting holes.

In some embodiments, the main control circuit board 50 and the battery 60 may be located in the same ear hook assembly 30 or may be located separately in each of the two ear hook assemblies 30, respectively, and this design will be described in more detail below. The main control circuit board 50 and the battery 60 can be connected to the two core modules 20 via a conductor (not shown in FIGS. 1-5), and the main control circuit board 50 can be used to control the generation of sound by the core module 20 (for example, to control the conversion of electrical signals mechanical vibrations), and battery 60 may be used to provide power to bone conduction headphones 10 (eg, two core modules 20). In some embodiments, the bone conduction headphones 10 described in the present disclosure may further include components such as a microphone (e.g., microphone, pickup, etc.), a communications unit (e.g., Bluetooth, etc.). ) etc., which may also be connected to the main control circuit board 50 and the battery 60 through a wire to perform the corresponding function.

In some embodiments, the conductor may be an electrically conductive wire to provide an electrical connection between the various electronic components of the bone conduction headphones 10. If electrical connection of several circuits is required, the conductor may be a multi-core structure. For example, the conductor may include a plurality of electrically conductive wires.

As shown in FIG. 2, the ear hook assembly 30 may include an ear hook body 31 and a decorative member 32. The ear hook body 31 and the decorative member 32 may be connected to each other by an adhesive joint, a clamp joint, a threaded joint or the like, or any combination thereof. . When the user wears the bone conduction earphone 10, the decorative element 32 may be located on the side of the ear hook body 31 facing away from the core module 20. For example, the decorative element 32 may be located on the outside of the bone conduction headphones 10 to cause the ear hook body 31 to be decorated with the decorative element 32, thereby enhancing the appearance of the bone conduction headphones 10. In some embodiments, the decorative element 32 may protrude from the ear hook body 31. Alternatively, the decorative element 32 may be built into the ear hook body 31. In some embodiments, decorative element 32 may be a sticker, a plastic piece, a metal piece, or the like, or any combination thereof. The decorative element 32 may be decorated with a printed geometric pattern, a cartoon pattern, a logo pattern, etc. Alternatively, fluorescent material, reflective material, etc. may also be applied to the decorative element 32. to achieve the appropriate decorative effect.

As shown in FIG. 2 and 3, the ear hook body 31 may include an earphone mounting portion 311, a curved transition portion 312, and a housing container 313, which are connected in series. The earphone mounting portion 311 may be configured to attach the core module 20. The interaction between the earphone mounting portion 311 and the core module 20 will be described in detail below. The curved transition portion 312 may be configured to connect the housing container 313 to the earphone mounting portion 311. The curved transition portion 312 may be curved and positioned so that it can be suspended from the outside of a human ear. In some embodiments, one end of the housing container 313, remote from the earphone mounting portion 311, may be connected to a back hook assembly 40 (e.g., an adhesive connection, a clamp connection, a threaded connection or the like, or any combination thereof) to connect the component 30 ear hook and rear hook node 40. One end of the housing container 313 may have an opening for housing the control circuit main board 50 and/or battery 60. In this case, the ear hook body 31 may further include a container cover 314. A container lid 314 may be positioned at the open end of the placement container 313.

In some embodiments, bone conduction headphones 10 may further include a key module, an interface module, and the like. For example, when the housing container 313 is configured to house the main circuit board 50, as shown in FIG. 2, the ear hook assembly 30 may further include a control key 33 and a Type-C (or universal serial bus (USB)) interface 34. The control key 33 and the Type-C (USB) interface 34 may be arranged on the housing container 313, so that the control key 33 and the Type-C (USB) interface 34 can be connected to the control circuit main board 50, thereby shortening the wiring length. For example, the control key 33 and the TYPE-C (USB) interface 34 may be partially protruded from the ear hook body 31 to facilitate the user to perform the corresponding operation. In such cases, the control key 33 may be configured to turn on/off the bone conduction earphone 10, adjust the volume, etc. Interface 34 TYPE-C (USB) can be configured for data transfer, battery charging, etc. In addition, the ear hook assembly 30 may further include an indicator light 35. The indicator light 35 may be disposed on the housing container 313 to connect to the control circuit main board 50, thereby shortening the wiring length. In some embodiments, the indicator light 35 may be partially displayed on the ear hook body 31, as shown in FIG. 2. or may further include a light source hidden in the ear hook body 31 and a light guide partially exposed to the outside of the ear hook body 31 (not shown in FIGS. 2 and 3). In such cases, the indicator light 35 may be configured to prompt the user that the bone conduction earphone 10 is charging, that the bone conduction earphone 10 is insufficiently charged, etc.

In some embodiments, when the user wears the bone conduction headphones 10, the bone conduction headphones 10 may be suspended on the outside of the human ear. For example, the core module 20 may be located in front of a human ear. The main control circuit board 50 or the battery 60 may be located behind the human ear. For example, the human ear may be the fulcrum for supporting bone conduction headphones 10. In such cases, most of the weight of the bone conduction headphones 10 can be perceived by the human ear. This may be uncomfortable for the user when wearing the bone conduction earphone 10 for a long time. For this purpose, a soft material (particularly for the curved transition portion 312) may be selected as the material of the ear hook body 31, so that the wearing comfort of the bone conduction headphones 10 can be improved. In some embodiments, the material of the ear hook body 31 may be polycarbonate (PC), polyamide (PA), acrylonitrile butadiene styrene (ABS), polystyrene (PS), high impact polystyrene (HIPS), polypropylene (PP), polyethylene terephthalate ( PET), polyvinyl chloride (PVC), polyurethanes (PU), polyethylene (PE), phenol formaldehyde (PF), urea formaldehyde (UF), melamine formaldehyde (MF), silica gel or the like, or any combination thereof. In some embodiments, since the material of the ear hook body 31 is soft, the rigidity of the ear hook body 31 may not be sufficient. The structure of the ear hook body 31 may not be maintained under external force. The ear hook body 31 may break due to insufficient strength. To this end, an elastic metal wire (not shown in FIG. 3) may be used in the ear hook body 31 (at least at the bent transition portion 312) to increase the strength of the ear hook body 31, thereby increasing the reliability of the ear hook body 31. The material of the elastic metal wire may be spring steel, titanium alloy, titanium-nickel alloy, chrome-molybdenum steel or the like, or any combination thereof. In some embodiments, the ear hook body 31 may be a structured piece formed as a single piece by injection molding a metal insert.

Based on the above detailed description, since the core module 20 is located at one end of the ear hook assembly 30 (for example, at the end of the earphone mounting portion 311), the control circuit main board 50 or the battery 60 may be located at the other end of the ear hook assembly 30 (for example, at the other end of the placement container 313). In such cases, when the core module 20 is connected to the main control circuit board 50 and the battery 60 via an electrically conductive wire, the electrically conductive wire may extend at least through the area where the curved transition portion 312 is located. In some embodiments, to provide an attractive appearance to the earphone 10 with bone conduction, the electrical conductive wire may not protrude beyond the ear hook body 31 but extend within the ear hook body 31, so that the curved transition portion 312 can at least hide the electrical conductive wire. However, since the material of the electrical conductive wire is soft, it is difficult for the electrical conductive wire to pass through the ear hook body 31. To this end, as shown in FIG. 2-5, in some embodiments, a first groove 315 may be provided in the ear hook body 31 (at least in the curved transition portion 312). The first groove 315 may be configured for wire routing to reduce the difficulty of routing electrically conductive wire through the ear hook body 31. . The first groove 315 may be located on the side of the ear hook body 31 facing the decorative bracket 321. In such a case, the decorative member 32 may be inserted and fixed in the first groove 315 corresponding to the curved transition portion 312 to form a wiring channel (in FIG. 2 and 4 not shown). In such cases, the electrically conductive wire may be pulled into the container 313 for placement through the wiring channel in the ear hook body 31, so that the core module 20 can be connected to the main control circuit board 50 and the battery 60 via the electrically conductive wire. Accordingly, when the electrical conductive wire passes through the ear hook body 31 along the first groove 315, the decorative member 32 may cover the electrical conductive wire so that the electrical conductive wire does not protrude beyond the ear hook body 31. In such a case, the decorative element 32 can be configured to decorate the ear hook body 31 and hide the electrically conductive wire, so that the decorative element 32 can be a "one-piece dual-use piece".

As shown in FIG. 2, the decorative element 32 may include a decorative bracket 321 and a decorative strip 322. The decorative bracket 321 may be curved and positioned in the curved transition portion 312. Accordingly, when the decorative bracket 321 is inserted and secured in the first groove 315 corresponding to the curved transition portion 312, the decorative bracket 321 and the first groove 315 form a wiring channel. The electrically conductive wire may extend from the core module 20 to the housing container 313 through the wiring channel. In addition, a decorative strip 322 may be inserted into the first groove 315 and secured to the decorative bracket 312. In such a case, the decorative bracket 321 may be a plastic piece. The decorative bracket 321 may be connected to the ear hook body 31 using an adhesive connection and/or a clamp connection. The decorative strip 322 may be a sticker. The decorative strip 322 may be attached to the decorative bracket 312 using an adhesive connection. Accordingly, when the user changes the appearance of the decorative element 32, the decorative strip 322 can be removed without removing the entire decorative element 32 from the ear hook body 31. In FIG. 6 is a schematic view of the structure of the side of the decorative bracket facing the body of the ear hook shown in FIG. 4, in some embodiments of the present invention. In some embodiments, as shown in FIG. 6, the second groove 3211 may be located on the side of the decorative bracket 321 facing the ear hook body 31. Accordingly, when the decorative bracket 321 is inserted and locked into the first groove 315 of the decorative bracket 321, the second groove 3211 and the first groove 315 can cooperate with each other to form a wiring channel.

In some embodiments, a recess 316 may be provided at the bottom of the first groove 315 near the end portion of the decorative strip 322 such that the end of the decorative strip 322 can be raised from the first groove 315 when the decorative strip 322 is pressed into the recess 316, thereby facilitating replacement of the decorative strip 322. B In this case, the first groove 315 may further extend to the placement container 313. The recess 316 may be located on the placement container 313. The recess 316 may be positioned outside the area in which the decorative bracket 321 overlaps the first groove 315. The decorative strip 322 may be mounted and secured to the decorative bracket 321 and cover the recess 316. In this case, the total length of the decorative strip 322 may be greater than the total length of the decorative strip 322. bracket 321.

In some embodiments, the decorative bracket 321 and the decorative strip 322 may also be an integrally formed structural element. The material of the decorative bracket 321 may be different from the material of the decorative strip 322. The decorative bracket 321 and the decorative strip 322 can be formed by two-color injection molding so that the decorative bracket 321 can serve as a support function and the decorative strip 322 as a decoration function. For example, the overall length of the decorative strip 322 may be greater than or equal to the overall length of the decorative bracket 321.

As shown in FIG. 3, the first groove 315 may be divided into a first groove section 3151 located on the curved transition portion 312, a second groove section 3152 located on the earphone mounting portion 311, and a third groove section 3153 located on the housing container 313. The depth of the first groove section 3151 may be greater than the depth of both the second groove section 3152 and the third groove section 3153. Accordingly, the first groove section 3151 may be configured to receive the decorative bracket 321 and wiring. The second groove section 3152 and the third groove section 3153 may be configured to receive the decorative strip 322. In other words, the decorative strip 322 may not only be located in the first groove section 3151, but also extend into the second groove section 3152 and the third groove section 3153. In such a case, the recess 316 may be located in the third groove section 3153. In addition, the depth of the second groove section 3152 may be equal to the depth of the third groove section 3153. After inserting and fixing the decorative bracket 321 into the first groove section 3151, the surface of the decorative bracket 321 facing away from the ear hook body 31 may be substantially flat relative to the bottom of the second groove section 3152 and the bottom of the third groove section 3153, so that the decorative strip 322 may be flat. be attached to the earphone mounting portion 311, the decorative bracket 321, and the housing container 313.

In some embodiments, the adhesive strength between the decorative strip 322 and the decorative bracket 321 may be less than the adhesive strength of the decorative bracket 321 to the curved transition portion 312. When the decorative strip 322 is adhered to the decorative bracket 321, the adhesive strength may be related to the adhesive strength of the decorative strip. 322 with decorative bracket 321. In this case, the adhesive strength may depend on the bonding surface roughness of decorative bracket 321, the bonding surface roughness of decorative strip 322, and/or the amount (and/or viscosity) of adhesive between decorative strip 322 and decorative bracket 321. In some embodiments embodiment, when the decorative bracket 321 is clamped by the curved transition portion 312, the fixing strength may be related to the clamping strength of the decorative bracket 321 by the curved transition portion 312. In this case, the fastening strength may depend on the clearance between the decorative bracket 321 and the curved transition portion 312 and/or on the depth clamping the decorative bracket 321 with the curved transition portion 312. Accordingly, when the decorative bracket 321 and the ear hook body 31 are connected by a clamp connection, the two ends of the decorative strip 322 can be further adhered to the housing container 313 and the earphone mounting portion 311, respectively, for additional fixing the decorative bracket 321. When the decorative bracket 321 is replaced to change the appearance of the decorative element 32, the decorative bracket 321 may not be damaged due to excessive bond strength between the decorative bracket 321 and the decorative strip 322.

In some embodiments, if the placement container 313 shown in FIG. 2 is configured to house the main circuit board 50, then the housing container 313 shown in FIG. 4 may be configured to accommodate the battery 60. In this case, if the ear hook assembly 30 shown in FIG. 2 corresponds to the left ear hook of the bone conduction headphones 10, then the ear hook assembly 30 shown in FIG. 4, corresponds to the right ear hook of the bone conduction headphones 10. Alternatively, if the ear hook assembly 30 shown in FIG. 2 corresponds to the right ear hook of the bone conduction headphones 10, then the ear hook assembly 30 shown in FIG. 4, can match the left ear hook of bone conduction headphones 10. In other words, the main control circuit board 50 and the battery 60 may be located in different ear hook assemblies 30, respectively. Accordingly, the capacity of the battery 60 may be increased to increase the battery life of the bone conduction headphones 10. The weight of the bone conduction headphones 10 may be balanced to improve the wearing comfort of the bone conduction headphones 10. In such a case, the main control circuit board 50 and the battery 60 may be connected to the wires of the rear hook assembly 40, and the specific configuration will be described in detail below. In some embodiments, the left ear hook (or right ear hook) and/or the back hook assembly 40 may be omitted, where the bone conduction earphone 10 may have a single ear hook, and the ear hook housing container 313 may simultaneously contain a main board. 50 control circuits and 60 battery.

As shown in FIG. 4, the ear hook assembly 30 may further include a button 36. A button adaptation hole 317 may be located on the ear hook body 31. The decorative bracket 321 may be attached to one side of the ear hook body 31. The button 36 may be located on the other side of the ear hook body 31 facing away from the decorative bracket 321 and protruding outward through the button adaptation hole 317. The decorative bracket 321 may further extend to the top of the button 36 in a cantilever manner and may cause the button 36 to operate when an external force is applied to it. The button 36 may protrude through the hole 317 to accommodate the button. In such cases, the button 36 can be used to replace the above-mentioned control key 33 to simplify the structure of the bone conduction earphone 10. Alternatively, the button 36 may coexist with the above-mentioned control key 33. The button 36 may be configured to turn on/pause the bone conduction earphone 10, wake up with artificial intelligence (AI), etc. to enhance the user's interaction with the bone conduction earphone 10.

In some embodiments, the button adaptation hole 317 may be located at the earphone mounting portion 311. The button 36 can be pressed by the user on the earphone mounting portion 311. In this case, the ear hook assembly 30 may further include a sealing component 37. The sealing component 37 may be disposed between the button 36 and the earphone mounting portion 311. The material of the sealing component 37 may be silica gel, rubber or the like, or any combination thereof. Accordingly, the waterproofness of the earphone mounting portion 311 in the area where the button 36 is located can be improved. The pressing of the button 36 could also be improved.

Similarly, when the core module 20 is located at one end of the ear hook assembly 30 (for example, at the end where the earphone mounting portion 311 is located), and the battery 60 is located at the other end of the ear hook assembly 30 (for example, at the end where the storage container 313 is located). placement), the electrically conductive wire may extend at least through the region where the curved transition portion 312 is located, so that the core module 20 can be connected to the battery 60 via the electrically conductive wire. To this end, as shown in FIG. 4, the first groove 315 may be located on at least one side of the earphone mounting portion 311 and the curved transition portion 312 facing the decorative bracket 321. The first groove 315 may be configured for wiring to reduce the difficulty of routing an electrically conductive wire in the ear hook body 31. In addition, one end of the first groove 315 may communicate with the button adaptation hole 317. When the decorative bracket 321 is inserted and secured in the first groove 315, the decorative bracket 321 may also cover the button adaptation hole 317 for operating the button 36.

Thus, the decorative element 32 can be configured to decorate the ear hook body 31, shield the electrical conductive wire, shield the button 36, and operate the button 36, so that the decorative element 32 can be “one piece with four functions”.

As shown in FIG. 5, the first groove 315 may be divided into a first groove section 3151 located on the curved transition portion 312 and a second groove section 3152 located on the earphone mounting portion 311. The depth of the first groove section 3151 may be greater than the depth of the second groove section 3152 such that the first groove section 3151 may be configured to route wires, and the second groove section 3152 and the first groove section 3151 may be configured to receive a decorative bracket 321. For example, hole 317 to adapt the button may be located in the second groove section 3152. That is, the projections of the button adaptation hole 317 and the second groove portion 3152 onto the earphone mounting portion 311 may at least partially overlap. In addition, the first groove 315 may also have a third groove section 3153 located on the placement container 313. The third groove section 3153 may also have a recess 316. The depth of the second groove section 3152 may be greater than the depth of the third groove section 3153 such that the third groove section 3153 may be configured to receive the decorative strip 322. In other words, the decorative strip 322 may not only be located in the first groove section 3151 and the second groove section 3152, but also continue into the third groove section 3153. For example, after inserting and locking the decorative bracket 321 into the first groove section 3151, the surface of the decorative bracket 321 facing away from the ear hook body 31 may be substantially flat with respect to the bottom of the third groove section 3153. In such cases, the decorative strip 322 may be flatly attached to the earphone mounting portion 311, the decorative bracket 321, and the housing container 313. A decorative bracket 321 may be cantilevered over a second groove section 3152 in which a button adaptation hole 317 is located.

As shown in FIG. 6, the decorative bracket 321 may include a locking portion 3212 corresponding to the first groove section 3151 and a pressing portion 3213 corresponding to the second groove section 3152. The thickness of the fixing portion 3212 may be greater than the thickness of the pressing portion 3213, so that the fixing portion 3212 may be configured to assemble the decorative bracket 321 with the ear hook body 31. The pressing portion 3213 may be configured to operate the button 36. In addition, when the second groove 3211 is located on the side of the decorative bracket 321 facing the ear hook body 31, the second groove 3211 may be located on the locking portion 3212.

In FIG. 7 is a schematic illustration of the button actuation mechanism of the decorative bracket shown in FIG. 4, in some embodiments of the present invention. As shown in FIG. 6 and 7, the decorative bracket 321 may include a connecting portion 3214 located between the fixing portion 3212 and the pressing portion 3213. The connecting portion 3214 may be curved and extend from the ear hook body 31 relative to the fastening portion 3212. The pressing portion 3213 may be curved and extending toward the ear hook body 31 relative to the fixing portion 3212. In this case, the connecting portion 3214 may cause the pressing portion 3213 to be suspended relative to the fixing portion 3212. There may be some distance between the pressing portion 3213 and the fixing portion 3212. This distance may be greater than or equal to the operating stroke of the button 36. Accordingly, the problem that when a user presses one end of the decorative bracket 321 (for example, one end of the pressing portion 3213), the other end of the decorative bracket 321 can be effectively eliminated rises.

In some embodiments, one side of the pressure portion 3213 near the ear hook body 31 may also be provided with a button projection 3215. In such cases, when an external force is applied to the pressure portion 3213, the button protrusion 3215 may actuate the button 36. The projections of the button protrusion 3215 and the button 36 may at least partially overlap at the earphone mounting portion 311. The effective area of the button protrusion 3215 in contact with the button 36 may be less than the effective area of the pressure portion 3213 in contact with the button 36. In such cases, the difficulty of operating the button 36 can be reduced. For example, when a sealing component 37 is installed between the earphone mounting portion 311 and the button 36, the sealing component 37 may first be deformed before the button 36 is actuated. Based on the relationship equation in the case where the user applies the same external force F, if the effective area S of the deformable area of the sealing component 37 is smaller, the deformation generated by the sealing component 37 may be greater, which may facilitate the operation of the button 36. In some embodiments, the button protrusion 3215 may reduce the effective area compared to the area of the pressure section 3213.

In some embodiments, a blocking portion 3216 may be located at an end portion of the decorative bracket 321 adjacent to the earphone mounting portion 311. The blocking portion 3216 may be configured to form a block on the inner surface of the earphone mounting portion 311 facing away from the decorative bracket 321 to prevent the end portion from lifting up. decorative bracket 321 from the first groove 315, for example, under the influence of an external force. As shown in FIG. 7, the locking portion 3216 may be located at an end of the pressing portion 3213 remote from the locking portion 3212. In this case, due to the locking effect between the locking portion 3216 and the earphone mounting portion 311, after the decorative bracket 321 is deformed under the external force to When the button 36 is activated, the decorative bracket 321 cannot be raised due to excessive elastic recovery.

Referring to FIG. 2 or 6, a clamping portion 3217 may be located at the end of the decorative bracket 321 adjacent the placement container 313 (for example, at the end of the decorative bracket 321 away from the clamping portion 3213). The thickness of the clamping portion 3217 may be less than the thickness of the locking portion 3212. In such In cases, the clamp portion 3217 may be configured to avoid structural interference with the reinforcement structure of the ear hook body 31 (eg, located between the curved transition portion 312 and the accommodation container 313).

In FIG. 8 is a schematic view of the structural decomposition of the core module shown in FIG. 1, in some embodiments of the present invention. As shown in FIG. 8, the core module 20 may include a core body 21 and a core 22. One end of the core body 21 may have an opening. The ear hook body 31 (e.g., earphone mounting portion 311) may be located at the open end of the core body 21 (e.g., the opening end of the core body 21) to form a chamber structure for housing the core 22. In some embodiments, the ear hook body 31 may be equivalent to the core housing cover 21. In such cases, compared with the insertion assembly of the ear hook structure and the core structure, the cover assembly of the ear hook body 31 and the core body 21 in some embodiments of the present invention can improve the stress problem at the insertion site of the ear hook structure and the core structure, thereby increasing the reliability earphone 10 with bone conduction.

It should be noted that the ear hook body schematically shown in FIG. 8 is only intended to illustrate the relationship of the relative positional relationship between the ear hook body and the core body, which may further indirectly indicate the possible assembly of the ear hook body and the core body.

In some embodiments, core 22 may be directly or indirectly attached to core body 21 such that core 22 can generate vibrations when excited by an electrical signal. The core body 21 may vibrate in accordance with said vibrations. When the user wears the bone conduction earphone 10, the skin contact area of the core body 21 (for example, the bottom wall 211 described later) may be in contact with the user's skin so that vibrations can be transmitted to the cochlear nerve through the human skull. In addition, the user can hear the sound produced by the bone conduction earphone 10. In some embodiments, when the user wears the earphone, one side of the core body 21 (eg, the bottom wall 211 described below) may face the user's head. For example, the earphone may also include an air conduction earpiece. One or more sound conduction holes may be provided on one side of the air conduction earphone, and when the air conduction earphone is worn by a user, the side with the one or more sound conduction holes may face the ear canal of the user. The sound signal generated by the earphone can be transmitted to the user through air conduction. Alternatively or additionally, one or more sound conduction holes may be located on different side walls of the earphone to provide different sound transmission effects. For example, the first sound conducting hole may be located on a bottom wall of the earphone facing the user's head, and the first sound conducting hole may be used to transmit a first sound signal to the user's ear canal. The second sound conducting hole may be provided on side walls other than the bottom wall, and the second sound conducting hole may be used to transmit the second sound signal. The second sound signal may be superimposed on the leaked sound wave generated by the vibration of the core body 21 to achieve the effect of reducing sound leakage from the core body 21. In some embodiments, core module 20 may further include core bracket 23. The bracket 23 may be configured to secure the core 22 to the core housing 21.

Low frequency can refer to sound with a frequency of less than 500 Hz. Mid frequency can refer to sound with frequencies ranging from 500 to 4000 Hz. High frequency can refer to sound with a frequency greater than 4000 Hz. In FIG. 9 illustrates the frequency response curve of a bone conduction earphone in some embodiments of the present invention. As shown in FIG. 9, the horizontal axis may represent the vibration frequency. The horizontal axis unit can be Hertz (Hz). The vertical axis can represent the intensity of the vibrations. The unit of measurement along the vertical axis can be decibel (dB). The high frequency region (eg, the range above 4000 Hz) may include a first high frequency trough V, a first high frequency peak P1, and a second high frequency peak P2. The first high-frequency valley V and the first high-frequency peak P1 may occur due to deformation of the non-skin contact region of the core body 21 (eg, the annular peripheral wall 212 described below) under the influence of high frequency. The second high frequency peak P2 may be generated by deformation of the skin contact area of the core body 21. The frequency response curve in the frequency range from 500 to 6000 Hz can be critical for a bone conduction earphone. It is not desirable to have sharp peaks in the mentioned frequency range. The flatter the frequency response curve, the better the sound quality of the bone conduction earphone. The greater the rigidity of the structure (eg, the core body 21), the less the deformation of the structure that occurs under force, and resonance at a higher frequency may occur. Accordingly, the first high-frequency valley V, the first high-frequency peak P1, and the second high-frequency peak P2 can be moved to a higher frequency region by increasing the rigidity of the core body 21. In other words, to obtain better sound quality, the rigidity of the core body 21 should be as high as possible. To this end, in some embodiments, the material of the core body 21 may be a mixture of at least one of polycarbonate, polyamide, acrylonitrile butadiene styrene copolymer, etc., and fiberglass and/or carbon fibers. In some embodiments, the material of the core body 21 may be a mixture of carbon fibers and polycarbonate in a certain proportion, a mixture of fiberglass and polycarbonate in another proportion, or a mixture of fiberglass and polyamide in yet another proportion. In some embodiments, the material of the core body 21 may be a mixture of carbon fibers, fiberglass and polycarbonate in a certain proportion. In some embodiments, after adding carbon fibers and/or glass fibers in varying proportions, the elastic moduli of the materials may be different, which may also result in different stiffness of the core body 21. For example, 20% to 50% fiberglass can be added to polycarbonate. The elastic modulus of the material can be from 6 to 8 GPa.

Based on the detailed description, on the one hand, the ear hook body 31 (for example, the earphone mounting portion 311) may be part of the core module 20 to form a chamber structure for housing the core 22. On the other hand, in some embodiments, to improve the wearing comfort of the earphone with bone conduction, the ear hook body 31 can be made of a soft material so that the rigidity of the ear hook body 31 can be reduced. In such cases, if the ear hook body 31 is covered by the core body 21 to form a chamber structure for housing the core 22, then since the rigidity of the ear hook body 31 (for example, the earphone mounting portion 311) is less than the rigidity of the core body 21, the bone conduction earphone can easily leak sound, which can further influence the user's favor.

In some embodiments, the resonant frequency of the structure may be related to the stiffness of the structure. With the same mass, the greater the rigidity of the structure, the higher the resonant frequency. In some embodiments, the stiffness K of a structure may be related to the material (eg, its modulus of elasticity), the shape of the structure, etc. In some embodiments, the greater the modulus E of the material, the greater the stiffness K of the structure. The greater the thickness t of the structure, the greater the rigidity K of the structure. The smaller the area S of the structure, the greater the rigidity K of the structure. In this case, the above relationship can be simply described using the relationship equation In such cases, increasing the elastic modulus E of the material, increasing the thickness t of the material, reducing the area S of the structure or the like, or any combination thereof, allows the stiffness K of the structure to be increased, which can further increase the resonant frequency of the structure.

In some embodiments, the ear hook body 31 may be made of a soft material (eg, a material having a low modulus of elasticity such as polycarbonate, polyamide, etc., where the modulus of elasticity may be in the range of 2 to 3 GPa). The core body 21 may be made of a hard material (for example, a material having a high elastic modulus, such as polycarbonate containing 20% to 50% glass fiber, etc., and the elastic modulus of the material may be in the range of 6 to 8 GPa ). Due to the difference in elastic modulus, the rigidity of the ear hook body 31 and the rigidity of the core body 21 may not be the same, which may easily cause sound leakage. In addition, after connecting the ear hook body 31 to the core body 21, since the rigidity of the ear hook body 31 is different from that of the core body 21, the structure can easily resonate at a relatively low frequency. To overcome this, in some embodiments, when the elastic modulus of the core body 21 is greater than the elastic modulus of the ear hook body 31, the earphone attachment portion 311 may be provided with a reinforcement structure 318 so that the ratio of the difference in stiffness K1 of the skin contact area of the core body 21 and the stiffness K2 of the earphone attachment portion 311 to the rigidity K1 of the skin contact region of the core body 21 may be less than or equal to the first predetermined ratio threshold. In some embodiments, the first predetermined threshold may be 10%. That is, (K1-K2)/K1≤10% or K2/K1≥90%. In such cases, the core body 21 may have a rigidity large enough so that the resonant frequency of the core body 21 is located in the region of as high a frequency as possible, and the difference between the stiffness of the earphone mounting portion 311 and the rigidity of the core body 21 can be reduced, so that the resonant frequency of the structure can be increased and the above-mentioned sound leakage can be reduced.

In FIG. 10 is a schematic cross-sectional view of the reinforcement structure disposed on the body of the ear hook shown in FIG. 8, in some embodiments of the present invention. In some embodiments, as shown in FIG. 10, the core body 21 may include a bottom wall 211 and an annular peripheral wall 212. In some embodiments, the bottom wall 211 may be a skin contact area of the core body 21. One end of the annular peripheral wall 212 may be integrally coupled to the bottom wall 211. In other words, the bottom wall 211 may be in contact with the user's skin (eg, facing the user's ear canal). In some embodiments, the earphone mounting portion 311 may include a fastening member 3111 coupled to a curved transition portion 312 and an annular flange 3112 integral with the fastening member 3111 and extending toward the core body 21. The annular flange 3112 and the other end of the annular peripheral wall 212, distant from the bottom wall 211, can be connected to each other. The annular flange 3112 and the other end of the annular peripheral wall 212 may be connected by an adhesive connection or a combination of an adhesive connection and a clamp connection.

It should be noted that the shape of the bottom wall 211 may be a triangle, trapezoid, rectangle, square, circle, ellipse, oval (similar to the shape of the earphone mounting portion 311 shown in FIG. 11), or the like, or any combination thereof. In some embodiments, the annular peripheral wall 212 may be positioned perpendicular to the bottom wall 211. That is, the area of the open end of the core housing 21 may be equal to the area of the bottom wall 211. In some embodiments, the annular peripheral wall 212 may be inclined outward relative to the bottom wall 211 (for example, the inclination angle may be less than or equal to 30 degrees). That is, the area of the open end of the core body 21 may be larger than the area of the bottom wall 211. In this embodiment, the bottom wall 211 may be oval-shaped, and the annular peripheral wall 212 may be inclined 10 degrees outward relative to the bottom wall 211. Accordingly, provided to ensure a certain wearing comfort (since the bottom wall 211 as the skin contact area of the core body 21 is in contact with the user's skin, the area may not be too small), the area of the bottom wall 211 can be reduced. The resonant frequency of the core body 21 can be increased.

As shown in FIG. 10(a), the reinforcement structure 318 may be an arcuate structure located between the fastening member 3111 and the annular flange 3112. That is, the reinforcement structure 318 may be realized by a rounding process. In some embodiments, since the size of the annular flange 3112 in the thickness direction of the earphone mounting portion 311 is small, the annular flange 3112 can be integrated with the above-mentioned arcuate structure. In this case, the structure of the earphone mounting portion 311 may include a fastening member 3111 and a reinforcing structure 318 in the form of an arcuate structure. In such cases, the above-mentioned arcuate structure can be configured to reduce the effective area of the earphone mounting portion 311 and increase the rigidity of the earphone mounting portion 311, thereby reducing the difference between the rigidity of the earphone mounting portion 311 and the rigidity of the core body 21. It should be noted that the size of the arcuate structure can be reasonably designed in accordance with the rigidity requirements of the earphone mounting portion 311, which may not be limited herein.

As shown in FIG. 10(b), the reinforcing structure 318 may be a thickened layer integrally formed with the fastening member 3111. That is, the reinforcing structure 318 may be formed by a thickening. The material of the thickened layer may be the same as the material of the ear hook body 31. For example, the thickened layer material may further include polycarbonate, polyamide, acrylonitrile-butadiene-styrene copolymer or the like, or any combination thereof. It should be noted that the reinforcing structure 318 may be located on the side of the fastening element 3111 facing the core body 21. Alternatively, the reinforcement structure 318 may be located on the other side of the core body 21, that is, on the side facing away from the fastener 3111. In some embodiments, the reinforcement structure 318 may also be located on both sides of the fastener 3111. In some embodiments, because The size of the annular flange 3112 in the thickness direction of the earphone mounting portion 311 is small, the annular flange 3112 can be integrated with the above-mentioned thickened structure. In this case, the earphone mounting portion 311 may include a main fastening member 3111 and a reinforcement structure 318 in the form of a thickened layer. Accordingly, the above-mentioned thickened structure can be configured to reduce the effective area of the earphone attachment portion 311 and increase the rigidity of the earphone attachment portion 311, thereby reducing the difference between the rigidity of the earphone attachment portion 311 and the rigidity of the core body 21. It should be noted that the size of the thickened layer can be reasonably designed in accordance with the rigidity requirements of the earphone mounting portion 311, which may not be limited herein.

In some embodiments, the reinforcing structure 318 may include a metal element. In some embodiments, the metal element material may be aluminum alloys, magnesium alloys, titanium alloys, nickel alloys, chromium-molybdenum steel, stainless steel or the like, or any combination thereof. In this case, the reinforcement structure 318 and the earphone mounting portion 311 may be a structural member formed by injection molding of a metal insert. Accordingly, the metal member can effectively increase the rigidity of the earphone mounting portion 311, thereby reducing the difference between the rigidity of the earphone mounting portion 311 and the rigidity of the core body 21. It should be noted that the parameters (eg, material, dimensions, etc.) of the metal member can be reasonably designed in accordance with the rigidity requirements of the earphone mounting portion 311, which may not be limited herein.

In FIG. 11 is a schematic top view of the reinforcement structure 318 located on the body of the ear hook shown in FIG. 8, in some embodiments of the present invention. In some embodiments, as shown in FIG. 11, the reinforcing structure 318 may be a stiffener located at the earphone mounting portion 311. In some embodiments, a stiffener may be located on one side of the earphone mounting portion 311 adjacent to the core body 21. In some embodiments, the reinforcing structure 318 may include a plurality of stiffeners. A plurality of stiffeners may be arranged in parallel, as shown in FIG. 11(a) and FIG. 11(b), or in grid form as shown in FIG. 11(c). A plurality of stiffeners may also be arranged radially with respect to a predetermined reference point at the earphone mounting portion 311 as a center, as shown in FIG. 11(d). In some embodiments, the material of the stiffener may be the same as the material of the ear hook body 31. For example, the stiffener material may be polycarbonate, polyamide, acrylonitrile-butadiene-styrene copolymer or the like, or any combination thereof. In such cases, compared with injection molding of a metal member on the earphone mounting portion 311 or directly thickening the earphone mounting portion 311, stiffeners located on the earphone mounting portion 311 can increase the rigidity of the earphone mounting portion 311 and balance the weight of the earphone mounting portion 311.

In some embodiments, as shown in FIG. 11, the earphone mounting portion 311 may have a long axis direction (for example, a direction indicated by a dotted line X in FIG. 11) and a short axis direction (for example, a direction indicated by a dotted line Y in FIG. 11). The size of the earphone mounting portion 311 along the long axis direction may be larger than the size of the earphone mounting portion 311 along the short axis direction. Below is an approximate description of the distribution of stiffeners.

As shown in FIG. 11(a), a plurality of stiffeners may be strip-shaped and extend along the long axis direction to be arranged side by side along the short axis direction. In this case, the reinforcing structure 318 can be simplified as adding stiffeners along the long side of the earphone mounting portion 311.

As shown in FIG. 11(b), the plurality of stiffeners may be strip-shaped and extend along the short axis direction to be arranged side by side along the long axis direction. In this case, the reinforcing structure 318 can be simplified by adding stiffeners along the short side of the earphone mounting portion 311.

As shown in FIG. 11(c), a plurality of stiffeners may be arranged along the long axis direction and the short axis direction, respectively, to form a mesh pattern. In this case, the reinforcing structure 318 can be simplified as adding intersecting stiffeners at the earphone mounting portion 311.

As shown in FIG. 11(d), the ends of a plurality of stiffeners located close to each other may be spaced. The extension lines of the plurality of stiffeners may intersect at a given reference point (as shown by the solid point O in FIG. 11). In this case, the reinforcing structure 318 can be simplified by adding stiffeners in the radial direction of the earphone mounting portion 311.

In some embodiments, when a predetermined aspect ratio between the stiffener and the earphone mounting portion 311 is satisfied, the rigidity of the earphone mounting portion 311 can be effectively increased, and the weight of the earphone mounting portion 311 can be balanced. In some embodiments, the ratio of the thickness of the stiffener to the thickness of the earphone mounting portion 311 may be in a first ratio range. For example, the first ratio range could be from 0.8 to 1.2. In some embodiments, the ratio of the rib width to the thickness of the earphone mounting portion 311 may be in a second ratio range. For example, the second ratio range could be from 0.4 to 0.6. In some embodiments, the ratio of the spacing between two adjacent stiffeners to the thickness of the earphone mounting portion 311 may be in a third ratio range. For example, the third ratio range could be from 1.6 to 2.4. In some embodiments, the thickness of the stiffener may be the same as the thickness of the earphone mounting portion 311, the width of the stiffener may be half the thickness of the earphone mounting portion 311, and the spacing between two adjacent stiffeners may be twice the thickness of the earphone mounting portion 311. Just as an example, in this embodiment, the thickness of the earphone mounting portion 311 may be 0.8 mm, and the thickness, rib width, and spacing between two adjacent stiffeners may be 0.8 mm, 0.4 mm, and 1.6 mm. respectively.

It should be noted that the various reinforcing structures shown in FIG. 10 and 11 may be reasonably combined based on the rigidity requirements of the earphone mounting portion 311, which may not be limited herein.

In FIG. 12 shows the frequency response curves of the plurality of reinforcement structures shown in FIG. 10 and 11, in some embodiments of the present invention. As shown in FIG. 12, the curve (A+B) may represent the frequency response curve of the earphone when the material of the earphone mounting portion 311 is different from the material of the core body 21 (for example, the elastic modulus of the earphone mounting portion 311 is less than the elastic modulus of the core housing 21) and there is no improvement in the design of the core portion 311 earphone mounts. The (B+B) curve may represent the frequency response curve of the earphone when the material of the earphone mounting portion 311 is the same as that of the core body 21 (for example, the elastic modulus of the earphone mounting portion 311 is the same as the elastic modulus of the core housing 21), and the structure of the earphone mounting portion 311 is similar to that of the core body 21 (for example, the thickness of the earphone mounting portion 311 is equal to the thickness of the core housing 21, and the area of the earphone mounting portion 311 is equal to the area of the bottom wall 211). Or it may correspond to the earphone mounting area 311. B may correspond to the bottom wall 211 (eg, the skin contact area of the core body 21). (A+B) and (B+B) may correspond to the ear hook body 31 (eg, the earphone mounting portion 311) located on the core body 21.

As shown in FIG. 12, for the (A+B) structure, the resonant trough (corresponding to the first high-frequency trough V) of the (A+B) structure appears at a frequency of about 5500 Hz. For the (B+B) structure, the resonant trough (corresponding to the first high-frequency trough V) of the (B+B) structure appears at a frequency of about 8400 Hz. If the structure (A+B) is improved to the structure (B+B), then the resonant frequency of the structure can be significantly increased.

Next, for the structure (A+B), after the earphone mounting portion 311 has been provided with a fillet as shown in FIG. 10(a), thickened as shown in FIG. 10(b), with stiffeners along the long side, as shown in FIG. 11(a), with stiffeners along the short side, as shown in FIG. 11(b), with cross ribs as shown in FIG. 11(c), and the radial shape of the stiffeners as shown in FIG. 11(d), a resonant cavity (A+B+ reinforcement structure) may appear in the frequency range from 5500 to 8400 Hz. In other words, the reinforcement structure 318 located at the earphone mounting portion 311 allows the resonant frequency of the structure to be increased. That is, the reinforcement structure 318 can reduce the difference between the rigidity of the earphone mounting portion 311 and the rigidity of the core body 21, thereby reducing the aforementioned sound leakage. It should be noted that if the designs of the reinforcing structure 318 are different, the increases in resonant frequency may be different. That is, the degrees of sound leakage elimination corresponding to different designs of the reinforcement structure 318 may be different. In some embodiments, if the effect of the reinforcement structure 318 on the resonant frequency is ranked from excellent to relatively optimal, the decreasing order of influence may be cross-ribs, short-side ribs, radial, thickening, long-side ribs, and rounding. .

Based on the above detailed description, the core 22 can generate oscillations when driven by an electrical signal. The core body 21 may vibrate due to vibrations of the core. When the user wears the bone conduction earphone 10, the bottom wall 211 of the core body 21 (for example, the skin contact area) may be in contact with the user's skin, so that the aforementioned vibrations may be transmitted to the cochlear nerve through the human skull, which may cause the user to hears the sound produced by the bone conduction earphone 10. In this case, in order to ensure reliable vibration transmission, the core body 21 may at least vibrate together with the core 22. Accordingly, the core 22 may be fixed in the core body 21.

In FIG. 13 is a schematic diagram showing the cross-sectional structure of the assembled core module shown in FIG. 8 along the I-I direction in some embodiments of the present invention. As shown in FIG. 13 and Fig. 8, one end of the core body 21 may have a hole. The core housing 21 may accommodate the core bracket 23 and the core 22. The core bracket 23 may be configured to secure the core 22 to the core housing 21. In FIG. 14 is a schematic diagram of the structure of the core bracket shown in FIG. 8, in some embodiments of the present invention. In some embodiments, as shown in FIG. 14, the core bracket 23 may include an annular body 231 and a limiting structure located on the bracket body 231. The core 22 may be suspended from the bracket body 231 for fixed connection with the core body 21. As shown in FIG. 13, the bounding structure and the core body 21 can be installed with interference so that the core bracket 23 can be fixed in the core body 21 along the circumferential direction of the bracket body 231 (for example, the direction indicated by arrow C in FIG. 14). The plane in which the bracket body 231 is located may be parallel to the plane of the bottom wall 211 to increase the fit between the bracket body 231 and the bottom wall 211, thereby increasing the vibration transmission effect. In this case, an adhesive (not shown in FIG. 13) such as structural adhesive, hot melt adhesive, flash adhesive, etc. may be present between the bracket body 231 and the bottom wall 211. Accordingly, the core bracket 23 and the core body 21 can be assembled by an adhesive connection and a clamp connection, which can effectively limit the degree of freedom of the core bracket 23 in the core body 21. In some embodiments, the core bracket 23 and the core body 21 may be directly bonded together. For example, an adhesive (not shown in FIG. 13), such as structural adhesive, hot melt adhesive, flash adhesive, etc., may be positioned between the bracket body 231 and the bottom wall 211, which can effectively limit the degree of freedom of the core bracket 23 there are 21 cores in the housing. The structure of the core body 21 can also be simplified.

As shown in FIG. 13, the core body 21 may further include a positioning post 213 connected to the bottom wall 211 or the annular peripheral wall 212. As shown in FIG. 14, the constraint structure may include a first constraint structure 232. The first constraint structure 232 may have an insertion hole 233. The positioning post 213 may be inserted into the insertion hole 233. Accordingly, the assembly accuracy of the core bracket 23 and the core body 21 can be greatly improved. For example, the aforementioned adhesive may be provided between the bracket body 231 and the bottom wall 211.

In some embodiments, as shown in FIG. 14, the constraint structure may further include a second constraint structure 234. The second constraint structure 234 may be disposed away from the first constraint structure 232 along a circumferential direction of the bracket body 231 (eg, in the direction indicated by arrow C in FIG. 14). The second boundary structure 234 may be adjacent to the annular peripheral wall 212, described in detail below. Accordingly, the second constraint structure 234 and the first constraint structure 232 may be mounted on respective structures on the core body 21, respectively, so that the core bracket 23 can be fixed relative to the core body 21. That is, the degree of freedom of the core bracket 23 relative to the core body 21 can be effectively limited.

As shown in FIG. 8, the open end of the annular peripheral wall 212 may have a long axis direction (for example, the direction indicated by the dotted line X in FIG. 8) and a short axis direction (for example, the direction indicated by the dotted line Y in FIG. 8). The size of the open end of the annular peripheral wall 212 in the long axis direction may be larger than the size of the open end of the annular peripheral wall 212 in the short axis direction. In FIG. 15 is a schematic top view of the assembled structure of the core module shown in FIG. 8, in some embodiments of the present invention. As shown in FIG. 15, the first constraint structure 232 and the second constraint structure 234 may be located on opposite sides of the bracket body 231 at intervals along the long axis direction. The projections of the first constraint structure 232 and the second constraint structure 234 onto the reference plane where the open end of the annular peripheral wall 212 is located (for example, the plane indicated by the dashed rectangular frame in FIG. 15) may be at least partially located outside the projection of the bracket body 231 to the reference plane. Accordingly, the first constraint structure 232 may interact with the positioning post 213. The second constraint structure 234 may interact with the annular peripheral wall 212.

As shown in FIG. 14, the first limiting structure 232 may include a first axial extension portion 2321 and a first radial extension portion 2322. The first axial extension portion 2321 may be coupled to the bracket body 231 and extend toward the side where the core 22 is located along an axial direction of the bracket body 231 ( for example, along the direction indicated in Fig. 14 by the dotted line Z). The first radial extension portion 2322 may be coupled to the first axial extension portion 2321 and extend to the outside of the bracket body 231 along a radial direction of the bracket body 231 (eg, along the diameter direction of the bracket body 231). For example, the insertion hole 233 may be located on the first radial extension portion 2322, as shown in FIG. 13-15 so that the first constraint structure 232 can cooperate with the positioning post 213. Next, as shown in FIG. 14, the second limiting structure 234 may include a second axial extension portion 2341 and a second radial extension portion 2342. The second axial extension portion 2341 may be coupled to the bracket body 231 and extend toward the side where the core 22 is located along an axial direction of the bracket body 231. The second radial extension portion 2342 may be connected to the second axial extension portion 2341 and extend to the outer side of the bracket body 231 along the radial direction of the bracket body 231. In some embodiments, the second radial extension portion 2342 may be adjacent to the annular peripheral wall 212. For example, as shown in FIG. 13 and Fig. 15, the second radial extension portion 2342 may be adjacent to the annular peripheral wall 212 by a clamp connection, so that the second limiting structure 234 may be adjacent to the annular peripheral wall 212. Accordingly, as shown in FIG. 13, the core 22 may be located between the first axial extension portion 2321 and the second axial extension portion 2341.

It should be noted that as shown in FIG. 13-15, taking the core 22 as a reference point, if the area between the first axial extension portion 2321 and the second axial extension portion 2341 is the inner side of the bracket body 231, then the area other than the inner side may be the outer side of the bracket body 231.

Referring to FIG. 13, the annular peripheral wall 212 may further include an inclined region 214 that corresponds to the first bounding structure 232 and is inclined relative to the lower wall 211. The positioning post 213 may be located on the inclined region 214. Accordingly, the effective distance between the first radial extension portion 2322 and the lower wall 211 can be reduced. That is, the height of the positioning post 213 can be reduced. The structural strength of the positioning post 213 (for example, the root portion of the positioning post 213 connected to the inclined region 214) on the core body 21 can be increased to prevent the positioning post 213 from breaking or falling off when the bone conduction headphones 10 are dropped or collided.

Referring to FIG. 15, two second bounding structures 234 may be spaced along the short axis direction. The projection of the first constraint structure 232 onto the reference plane and the projections of the two second constraint structures 234 onto the reference plane may be connected in series to form an acute triangle (eg, the triangle shown in dashed line in FIG. 15). In this case, the acute triangle may be an isosceles triangle, an equilateral triangle, etc. Accordingly, the interaction points between the core bracket 23 and the core body 21 can be arranged as symmetrically as possible, thereby increasing the reliability of the assembly of the core bracket 23 and the core body 21.

In some embodiments, the outer profile of the bracket body 231 may be in the shape of a circle. The annular peripheral wall 212 may have two arcuate recesses 2121 opposite each other along the short axis direction. The outer profile of the bracket body 231 may be fitted into two arcuate recesses 2121, respectively. In such cases, the degree of freedom of the core bracket 23 in the core body 21 may be further limited.

Based on the above detailed description, when the elastic modulus of the core body 21 is greater than the elastic modulus of the ear hook body 31, the ear hook body 31 can be connected to the core body 21 to form the above-mentioned structure (A+B). Due to the difference in stiffness, the resonant frequency of the structure (A+B) may be lower (curve (A+B) shown in Fig. 12). Sound leakage may easily occur. After the (A+B) structure is improved to the (B+B) structure, the resonant frequency of the structure ((B+B) curve shown in FIG. 12) can be effectively increased. Based on the improvement, the correlation structure of the core module 20 can be improved in some embodiments of the present invention.

In FIG. 16 is a schematic view of the structural decomposition of the core module shown in FIG. 1, in some embodiments of the present invention. As shown in FIG. 16, core module 20 may further include a cover 24. In some embodiments, one end of core housing 21 may have an opening. The cover 24 may be located at the open end of the core body 21 (for example, at the hole end of the core body 21) to form a chamber structure for housing the core 22. In other words, the cover 24 may be located at the other end of the annular peripheral wall 212, remote from the bottom wall 211 , and located opposite the bottom wall 211. In some embodiments, the cover 24 and the core body 21 may be connected by an adhesive connection or a combination of a clamp connection and an adhesive connection. Further, the ear hook body 31 may be coupled to the cover 24. For example, the earphone mounting portion 311 may completely or partially cover one side of the cover 24 facing away from the core body 21. In this embodiment, complete closure of the cover 24 by the earphone mounting portion 311 can be taken as an example for exemplary description. In this case, the ear hook body 31 and the core body 21 may be connected by an adhesive joint or a combination of a clamp joint and an adhesive joint.

It should be noted that the ear hook body in FIG. 16 is shown primarily for convenience of describing the relative position of the ear hook body and the cover, which may further indirectly indicate a possible assembly method of the ear hook body and the cover.

In some embodiments, the elastic modulus of the core body 21 may be greater than the elastic modulus of the ear hook body 31. The elastic modulus of the cover 24 may be greater than the elastic modulus of the ear hook body 31. In this case, in this embodiment, the cover 24 can be connected to the core body 21, which can increase the structural rigidity of the open end of the core body 21 (for example, the cover 24 and the earphone mounting portion 311). In such cases, the difference between the rigidity of the bottom wall 211 of the core body 21 and the structural rigidity of the open end of the core body 21 can be further reduced. The core body 21 may have a sufficiently high rigidity so that the resonant frequency of the core body 21 is located in the region of the highest possible frequency. The resonant frequency of the structure (core body 21, cover 24, and earphone mounting portion 311) can be increased, thereby reducing sound leakage.

In some embodiments, the modulus of elasticity of the cover 24 may be less than or equal to the modulus of elasticity of the core body 21. For example, the modulus of elasticity of the cover 24 may be equal to the modulus of elasticity of the core body 21. In this case, the cover 24 can be connected to the core body 21 to form a structure (B-B). In such cases, the ratio of the difference between the stiffness K1 of the bottom wall 211 and the stiffness K3 of the cover 24 to the stiffness K1 of the bottom wall 211 may be less than or equal to a second predetermined ratio threshold. In some embodiments, the second predetermined ratio threshold may be 10%. That is, (K1-K3)/K1≤10% or K3/K1≥90%.

In some embodiments, the area of the bottom wall 211 may be less than or equal to the area of the cover 24. The thickness of the bottom wall 211 may be less than or equal to the thickness of the cover 24. Based on the above detailed description, as long as a certain wearing comfort is achieved, the area of the bottom wall 211 may be reduced. The resonant frequency of the core body 21 can be increased. Accordingly, in this embodiment, in order to ensure that the core body can have a stiffness large enough to position the resonant frequency of the core body in the high-frequency region with the frequency as high as possible, the area of the bottom wall 211 can be less than or equal to the area of the cover 24. For example, the area the open end of the core body 21 may be larger than the area of the bottom wall 211. In some embodiments, according to the above ratio equation When the elastic modulus of the cover 24 is less than or equal to the elastic modulus of the core body 21, and the area of the bottom wall 211 is less than or equal to the area of the cover 24, in order to satisfy the above ratio equation (K1-K3)/K1≤10%, the thickness of the bottom wall 211 may be less than or equal to equal to the thickness of the cover 24.

In some embodiments, the material of the cover 24 may be the same as the material of the core body 21. For example, the material of the core cover 24 and core body 21 may be a mixture of polycarbonate and fiberglass and/or carbon fibers. In some embodiments, according to the above relation equation In order to satisfy the above equation of the ratio K3/K1≥90%, the ratio of the thickness-to-area ratio of the cover 24 and the thickness-to-area ratio of the bottom wall 211 may be greater than or equal to 90%. By way of example only, the thickness-to-area ratio of the cover 24 may be equal to the thickness-to-area ratio of the bottom wall 211.

It should be noted that according to the above relation equation In order to satisfy the above equation of the ratio (K1-K3)/K1≤10%, the design parameters (such as thickness, area and the ratio thereof) of the cover 24 and the core body 21 can be determined based on the material of the cover 24 and the core body 21. Alternatively, the material of the cover 24 and the core body 21 may be determined based on the design parameters (eg, thickness, area, and ratio) of the cover 24 and the core body 21. Accordingly, the above embodiments represent only two possible designs as examples.

Based on the above detailed description, after the cover 24 is connected to the core body 21 instead of the earphone fastening portion 311, the earphone fastening portion 311 may still be connected to one side of the core body 21 facing away from the cover 24. For example, , the cover 24 may be completely covered by the earphone mounting portion 311.

In some embodiments, if the ear hook body 31 and cover 24 are plastic members, and the modulus of elasticity of the ear hook body 31 is less than the modulus of elasticity of the cover 24, then the ear hook body 31 and cover 24 can be made as a single structural member using a two-color injection molding process. If the ear hook body 31 is a plastic part, the cover 24 is a metal part, and the modulus of elasticity of the ear hook body 31 is less than the elastic modulus of the cover 24, then the ear hook body 31 and the cover 24 can be made as a single structural element by injection molding of metal inserts. In this case, the ear hook body 31 and the cover 24 can be connected to the core body 21 into a single unit. Accordingly, the vibration consistency of the ear hook body 31 and the cover 24 can be ensured. However, it can be difficult to place the buttons mentioned above, the second microphone mentioned below, etc. between the ear hook body 31 and the cover 24.

In some embodiments, the earphone attachment portion 311 and the cover 24 may be connected by an adhesive connection or a combination of a clamp connection and an adhesive connection. In this case, the buttons mentioned above, the second microphone mentioned below, etc. may be located between the ear hook body 31 and the cover 24. A more detailed description of the design can be found below. In some embodiments, the degree of adhesive filling (not shown in FIG. 16) of the space between the earphone mounting portion 311 and the cover 24 may be as large as possible. For example, the fill rate may be greater than or equal to 90%. When the degree of filling of the space between the earphone mounting portion 311 and the cover 24 with adhesive is small, the bonding strength of the earphone mounting portion 311 and the cover 24 may be small. A large vibration hysteresis may be observed between the earphone mounting portion 311 and the cover 24. In addition, air may be present between the earphone mounting portion 311 and the cover 24, resulting in an adverse effect on the resonant frequency of the structure. That is, the above-mentioned beneficial effects of the above-mentioned improvement from structure (A+B) to structure (B+B) may be difficult to achieve. When the structure vibrates, noise can also occur.

In FIG. 17 shows frequency response curves of structures corresponding to a variety of types of adhesives used between the ear hook assembly 30 and the cover 24 shown in FIG. 14, in some embodiments of the present invention. As shown in FIG. 17, different types of adhesives can affect the resonant frequency of the structure. If adhesives are sorted by the degree of their beneficial effect on the resonant frequency, the order might be: structural adhesive, hot melt adhesive, flash adhesive and silica gel. It should be noted that since silica gel is soft, the beneficial effect on the resonant frequency of the structure may be weakest. Accordingly, considering the resonant frequency of the structure, an adhesive with high hardness should be used between the earphone mounting portion 311 and the cover 24.

Based on the above detailed description, the core bracket 23 may be configured to secure the core 22 to the core body 21 to improve the reliability of vibrations of the core body 21 caused by the core 22. The cover 24 may be configured to increase the structural rigidity of the open end of the core body 21 (e.g., the cover 24 and the earphone mounting portion 311) to reduce the difference between the rigidity of the bottom wall 211 of the core housing 21 and the structural rigidity of the open end of the core housing 21. The interaction between the core bracket 23 and the core housing 21 (for example, in the Z direction) can be realized by adhesively bonding the housing 231 bracket and bottom wall 211 and/or a clamp connection between the bounding structure and the annular peripheral wall 212. In addition, in this embodiment, based on the cover 24, other interaction between the core bracket 23 and the core body 21 (for example, in the Z direction) can be provided.

In FIG. 18 is a schematic diagram of the cross-sectional structure of the assembled core module shown in FIG. 16 along the II-II direction in some embodiments of the present invention. In FIG. 19 is a schematic view of the structure of the side of the cover 24 facing the core body 21 shown in FIG. 16, in some embodiments of the present invention. As shown in FIG. 18 and 19, the cover 24 may cover the open end of the core housing 21. A pressing structure may be provided on the side of the cover 24 facing the core body 21. The clamping structure may be configured to press and secure the core bracket 23 into the core body 21. In such cases, the cover 24 may increase the structural rigidity of the open end of the core body 21 (eg, the cover 24 and the earphone mounting portion 311). In addition, the cover 24 may press the core bracket 23 into the core body 21. In this case, the cover 24 may be "one piece with two functions."

As shown in FIG. 19, lid 24 may include a lid body 241 and a pressure surface integrally coupled to the lid body 241. In some embodiments, the pressing structure may include a first pressing post 242 and a second pressing post 243. The first pressing post 242 and the second pressing post 243 may be spaced along the circumferential direction of the lid body 241 and abut the core bracket 23. In some embodiments, the plane in which the lid body 214 is located may be parallel to the plane in which the bottom wall 211 is located, such that the plane in which the lid body 214 is located may be parallel to the plane in which the bracket body 231 is located, such that may further cause the extension directions of the first clamp post 242 and the second clamp post 243 to be perpendicular to the plane in which the bracket body 231 is located. That is, the extension directions of the first pressing post 242 and the second pressing post 243 may be parallel to the Z direction. In such cases, the degree of freedom of the core bracket 23 in the core body 21 (for example, in the Z direction) can be effectively limited.

In FIG. 20 is a schematic top view of the cover 24 shown in FIG. 19, in some embodiments of the present invention. As shown in FIG. 20, the cover 24 may have a long axis direction (eg, the direction indicated by the dotted line X in FIG. 20) and a short axis direction (eg, the direction indicated by the dotted line Y in FIG. 20). The size of the cover 24 in the long axis direction may be larger than the size of the cover 24 in the short axis direction. In this case, the first pressing post 242 and the second pressing post 243 may be positioned at intervals along the long axis direction. In such cases, the reliability of pressing the core bracket 23 to the core body 21 by the cover 24 can be increased.

In some embodiments, two second pressure posts 243 may be spaced along the short axis direction. In some embodiments, the projection of the first pressure post 242 onto the lid body 241 and the projections of the two second pressure posts 243 onto the lid body 241 may be connected in series to form an acute triangle (eg, the triangle shown in dotted line in FIG. 20). In this case, the acute triangle may be an isosceles triangle, an equilateral triangle, etc. In such cases, the interaction points of the core bracket 23 and the core body 21 can be arranged as symmetrically as possible, thereby increasing the reliability of the assembly of the core bracket 23 and the core body 21.

Referring to FIG. 18, the first pressure post 242 may be in contact with the first constraint structure 232 to form an abutment. The second pressure post 243 may be in contact with the second limiting structure 234 to form an abutment. In this case, the second limiting structure 232 and the annular peripheral wall 212 may not form the stop shown in FIG. 13. The processing precision of the second limiting structure 232 can be reduced, which can further reduce the manufacturing cost of the core bracket 23.

Likewise, as shown in FIG. 14, the first bounding structure 232 may include a first axial extension portion 2321 and a first radial extension portion 2322. The first axial extension portion 2321 may be coupled to the bracket body 231 and extend along an axial direction of the bracket body 231 (e.g., the direction indicated in FIG. 14 dotted line Z). The first radial extension portion 2322 may be coupled to the first axial extension portion 2321 and extend to the outside of the bracket body 231 along a radial direction of the bracket body 231 (eg, along the diameter direction of the bracket body 231). In this case, the insertion hole 233 may be located on the first radial extension portion 2322. The first pressing post 242 may abut the first radial extension portion 2322. That is, the first pressing post 242 may be pressed against the first radial extension portion 2322. Next, as shown in Fig. 14, the second limiting structure 234 may include a second axial extension portion 2341 and a second radial extension portion 2342. The second axial extension portion 2341 may be coupled to the bracket body 231 and extend toward the core 22 along an axial direction of the bracket body 231. The second radial extension portion 2342 may be connected to the second axial extension portion 2341 and extend to the outer side of the bracket body 231 along the radial direction of the bracket body 231. In this case, the second pressing post 243 may abut the second radial extension portion 2342. That is, the second pressing post 243 may abut the second radial extension portion 2342.

It should be noted that the two second pressing posts 243 may be located along the short axis direction. When the projection of the first pressing post 242 on the lid body 241 and the projections of the two second pressing posts 243 on the lid body 241 are connected in series to form an acute triangle, the two second limiting structures 234 may be spaced along the short axis direction and in accordance with the two second pressing posts 243. In such cases, when the first pressure post 242 abuts the first constraint structure 232 (e.g., the first radial extension portion 2322), two second pressure posts 243 may abut the second constraint structures 234 (e.g., the second radial extension portion 2342). , thereby increasing the reliability of pressing the core bracket 23 into the core body 21 using the cover 24.

It should be noted that, as shown in FIG. 18, since the first axial extension portion 2321 and the second axial extension portion 2341 extend in a direction close to the cover 24, the first press post 242 and the second press post 243 may extend in a direction close to the core body 21. Accordingly, the heights of the first constraint structure 232 and the second constraint structure 234 relative to the bracket body 231 and the heights of the first pressure post 242 and the second pressure post 243 relative to the lid body 241 may be half the distance between the lid body 241 and the bracket body 231. In such cases, the first limiting structure 232 and the second limiting structure 234 due to their excessive height relative to the bracket body 231 can be prevented from collapsing or falling off when the bone conduction earphone 10 falls or collides. Alternatively, the first pressing post 242 and the second pressing post 243 due to their excessive height relative to the cover body 241 can be prevented from collapsing or falling off when the bone conduction earphone 10 falls or collides. In addition, the structural strength of the first constraint structure 232 and the second constraint structure 234 on the bracket body 231 and the structural strength of the first pressure post 242 and the second pressure post 243 on the lid body 241 may be considered.

Referring to FIG. 19, the first pressure post 242 may be tubular in shape. As shown in FIG. 18, the positioning post 213 can be inserted into the insertion hole 233 to improve the assembly accuracy of the core bracket 23 and the core body 21. The positioning post 213 may be further inserted into the first pressing post 242 to improve the assembly accuracy of the cover 24 and the core body 21.

In FIG. 21 is a schematic view of the structural decomposition of the core module shown in FIG. 16 from a different angle in some embodiments of the present invention. As shown in FIG. 21, the core module 20 may further include a first microphone 25 and a second microphone 26. After the cover 24 is installed on the open end of the core body 21, the cover 24 and the core body 21 may form a chamber structure for housing the core 22. In this case, the first microphone 25 may be housed in the core housing 21. The second microphone 26 may be located outside the core housing 21. In such cases, the cover 24 may separate the first microphone 25 and the second microphone 26, thereby preventing interference between the first microphone 25 and the second microphone 26 (eg, separating the sound monitoring cameras of the first microphone 25 and the second microphone 26). In such cases, the cover 24 may increase the structural rigidity of the open end of the core body 21 (eg, the cover 24 and the earphone mounting portion 311). In addition, the cover 24 may press the core bracket 23 into the core body 21. The first microphone 25 and the second microphone 26 can be separated. In addition, the cover 24 can become "one piece with three functions." In addition, when the ear hook body 31 is closed by the cover 24, that is, when the earphone mounting portion 311 is closed on one side by the cover 24 from the core body 21, the second microphone 26 may be positioned between the cover 24 and the earphone mounting portion 311.

In some embodiments, the first microphone 25 and the second microphone 26 may be coupled to the main circuit board 50 to transmit audio to the main control circuit board 50. One of the first microphone 25 and the second microphone 26 may be an electric microphone, a capacitive microphone, a piezoelectric microphone, a carbon particle microphone, a semiconductor microphone or the like, or any combination thereof. For example, one of the first microphone 25 and the second microphone 26 may be an electret pickup, a silicon pickup, etc. The first microphone 25 and the second microphone 26 may be configured to pick up the sound of the environment in which the user (eg, a headphone wearer) is located, so that the bone conduction headphones 10 can perform noise reduction, thereby improving the usability of the bone conduction headphones 10. In addition, the first microphone 25 and the second microphone 26 may also be configured to pick up the user's voice, so that the bone conduction headphones 10 can function as a microphone while simultaneously serving as a loudspeaker, thereby expanding the application range of the bone conduction headphones 10. The first microphone 25 and the second microphone 26 may also pick up the user's voice and environmental sound. In such cases, the bone conduction headphones 10 can function as a microphone while performing noise cancellation, thereby improving the usability of the bone conduction headphones 10.

As shown in FIG. 21, an annular flange 215 may be located on the inside of the annular peripheral wall 212. The first microphone 25 may be inserted and secured into the annular flange 215. One side of the cover 24 (e.g., cover body 241) facing away from the core body 21 may include a socket 244 for microphone placement. The second microphone 26 may be located in the microphone housing 244 and covered by the earpiece mounting portion 311. Although the second microphone 26 is placed between the cover 24 and the earphone mounting portion 311, the overall thickness of the bone conduction earphone 10 can be reduced, thereby increasing the feasibility and reliability of the second microphone 26, the cover 24, and the earphone mounting portion 311. In other words, the first microphone 25 may be mounted on the annular peripheral wall 212. The second microphone 26 may be mounted on the cover 24. In this case, to facilitate the first microphone 25 and the second microphone 26 to pick up the user's voice and/or environmental sounds in the annular peripheral wall 212, a hole may be provided at the location of the first microphone 25 to pick up sounds (not shown in FIG. 21). An opening for collecting sounds (not shown in FIG. 21) may also be present in the earphone mounting portion 311 at the location of the second microphone 26. The acoustic direction of the first microphone 25 may be parallel to the cover 24 or at an angle to the cover 24. The acoustic direction of the second microphone 26 may be extend perpendicular to the cover 24. Accordingly, the first microphone 25 and the second microphone 26 may pick up sounds from different directions to increase the noise reduction and/or microphone effect of the bone conduction earphone 10, thereby improving the usability of the bone conduction earphone 10.

It should be noted that the acoustic direction of the first microphone 25 may be perpendicular to the annular peripheral wall 212. Based on the above detailed description, the plane in which the cover 24 is located (for example, the cover body 241) may be parallel to the plane in which the bottom wall 211 is located. The annular peripheral wall 212 may extend perpendicular to the lower wall 211. Alternatively, the annular peripheral wall 212 may be inclined outwardly relative to the lower wall 211. For example, the angle of inclination may be less than or equal to 30 degrees. In such cases, if the annular peripheral wall 212 is perpendicular to the bottom wall 211, the acoustic direction of the first microphone 25 may be parallel to the cover 24. When the annular peripheral wall 212 is tilted outward relative to the bottom wall 211, the acoustic direction of the first microphone 25 may be tilted relative to the cover 24. Angle the inclination of the annular peripheral wall 212 and the inclination angle of the acoustic direction may be substantially equal.

In some embodiments, the projection of the second microphone 26 on the cover 24 and the projection of the first microphone 25 on the cover 24 may be staggered from each other. In such cases, the first microphone 25 and the second microphone 26 may pick up sounds from different directions to increase the noise reduction and/or microphone effect of the bone conduction earphone 10, thereby improving the usability of the bone conduction earphone 10. The projection of the second microphone 26 onto the cover 24 may be closer to the curved transition portion 312 than the projection of the first microphone 25 onto the cover 24. Accordingly, the relative distance between the first microphone 25 and the second microphone 26 may be increased. The first microphone 25 and the second microphone 26 can furthermore pick up sounds from different directions. In some embodiments, the relative distance may be the maximum possible.

It should be noted that in the perspective view shown in FIG. 21, the first microphone 25 and the second microphone 26 may be located on opposite sides of the cover 24, respectively. The first microphone 25 may be located on the rear surface of the cover 24 such that the projection of the first microphone 25 onto the cover 24 may be virtually invisible. Accordingly, for ease of description, the first microphone 25 and the second microphone 26 may simply be considered to be located on the same side of the cover 24. The projection of the first microphone 25 onto the cover 24 may be replaced by a dotted frame.

In FIG. 22 is a schematic top view of the cover shown in FIG. 21, in some embodiments of the present invention. As shown in FIG. 22, the cover 24 may have a long axis direction (eg, the direction indicated by the dash-dotted line X in FIG. 22) and a short axis direction (eg, the direction indicated by the dash-dotted line Y in FIG. 22). The size of the cover 24 in the long axis direction may be larger than the size of the cover 24 in the short axis direction. In some embodiments, the angle between the line (eg, the dotted line shown in FIG. 22) connecting the projection of the second microphone 26 on the cover 24 and the projection of the first microphone 25 on the cover 24 and the long axis direction may be less than 45 degrees. For example, the angle may be less than or equal to 10 degrees. As another example, a line connecting the projection of the second microphone 26 on the cover 24 and the projection of the first microphone 25 on the cover 24 may overlap the long axis direction. In such cases, the projection of the second microphone 26 on the cover 24 and the projection of the first microphone 25 on the cover 24 may be staggered. The relative distance between the first microphone 25 and the second microphone 26 may be increased, causing the first microphone 25 and the second microphone 26 to pick up sound from different directions. The projection of the second microphone 26 onto the cover 24 may be closer to the curved transition portion 312 than the projection of the first microphone 25 onto the cover 24.

Based on the above detailed description, the core 22 and the first microphone 25 may be located in the core body 21. The cover 24 may also cover the open end of the core housing 21. For ease of wire routing, corresponding through holes and grooves can be made on the cover 24. As shown in FIG. 21 and Fig. 16, a threaded hole 245 may also be provided on the cover 24. Since the projection of the second microphone 26 on the cover 24 is located closer to the curved transition portion 312 than the projection of the first microphone 25 on the cover 24, the threaded hole 245 may be located proximal to the first microphone 25. In such cases , an electrically conductive wire (not shown in FIG. 21 and FIG. 16) connecting the first microphone 25 and the main control circuit board 50 may extend from the core body 21 to the side of the cover 24 facing away from the core body 21 through a threaded hole 245, and further to the container 313 for placement through the wiring channel in the curved transition portion 312. In this case, after the earphone mounting portion 311 closes the cover 24, a portion of the electrically conductive wire (the length of which is equal to or greater than the linear distance between the threaded hole 245 and the second microphone 26 ) may be located between the cover 24 and the earphone mounting portion 311.

In some embodiments, as shown in FIG. 21 and Fig. 16, the side of the cover 24 facing away from the core body 21 may further include a recess in the form of a wiring groove 246. One end of the wiring groove 246 may communicate with the threaded hole 245. The electrically conductive wire may further pass through the wiring groove 246. In such cases, the overall thickness is such that a portion of the electrically conductive wire is located between the cover 24 and the earphone mounting portion 311, thereby improving the feasibility and reliability of the lead wire, the cover 24, and the earphone mounting portion 311.

It should be noted that after the electrically conductive wire is routed from the threaded hole 245 through the wiring groove 246 into the core body 21, adhesive may be spot applied to the two ends of the wiring groove 246 so that the electrically conductive wire can be fixed to the cover 24. In addition, the compactness of the cover 24, the earphone mounting portion 311 and the electrical conductive wire can be increased. Precision application of adhesive into the threaded hole 245 may also improve the sealing of the core module 20.

In some embodiments, as shown in FIG. 21, two wire guiding grooves 216 may be located parallel on the inner side of the annular peripheral wall 212. Two wire guiding grooves 216 may be located adjacent the annular flange 215. Two welded joints are made between the positive and negative outer wires (not shown in FIG. 21). ) and the positive and negative terminals of the core 22 (not shown in Fig. 21), can be placed in two grooves 216 for guiding the wire, respectively. In such cases, a short circuit can be eliminated when the positive and negative terminals of the core 22 are welded to the positive and negative electrical conductive wires, thereby increasing the reliability of the wiring of the core 22.

In some embodiments, when the bone conduction earphone 10 is also provided with the button 36 shown in FIG. 4, on the side of the cover 24 facing away from the core body 21, a recess for receiving a button (shown in FIG. 1 without markings) may be provided. The button 36 may be located in the button receiving recess and covered by the earphone mounting portion 311. In such cases, although the button 36 is located between the cover 24 and the earphone mounting portion 311, the overall thickness of the bone conduction earphone 10 can be reduced, thereby improving the feasibility and reliability of the button 36, the cover 24, and the earphone mounting portion 311. . In this embodiment, the button housing recess may be similar to the aforementioned microphone housing 244.

It should be noted that the placement container 313 shown in FIG. 2 may be configured to house the main circuit board 50. The housing container 313 shown in FIG. 4 may be configured to accommodate battery 60. Accordingly, each of the first microphone 25 and the second microphone 26 may be located in the ear hook assembly 30 shown in FIG. 2, so that the first microphone 25 and the second microphone 26 can be connected to the main control circuit board 50, thereby shortening the wiring length. In addition, since the volumes of the core module 20 and the ear hook assembly 30 are limited, if the button 36 is located adjacent to the first microphone 25 and the second microphone 26, the button 36, the first microphone 25 and the second microphone 26 may interfere with each other. Therefore, the button 36 may be located in the ear hook assembly 30 shown in FIG. 4. In other words, if the button 36 is located in the left ear hook of the bone conduction earphone 10, then the first microphone 25 and the second microphone 26 may be located in the right ear hook of the bone conduction earphone 10. Conversely, if the button 36 is located in the right ear hook of the bone conduction headphone 10, then the first microphone 25 and the second microphone 26 may be located in the left ear hook of the bone conduction headphone 10. In some embodiments, for the core module 20 shown in FIG. 8, since the core module 20 does not include the cover 24 shown in FIG. 16, the corresponding structures of the first microphone 25, the second microphone 26, the buttons 36, etc. may be modified accordingly. For example, bone conduction headphones 10 may include either a first microphone 25 or a second microphone 26. Alternatively, bone conduction headphones 10 may include a first microphone 25 and a second microphone 26. When one of the first microphone 25 and the second microphone 26 is located in the left ear hook of the bone conduction earphone 10, another of the first microphone 25 and the second microphone 26 may be located in the right ear hook of the bone conduction earphone 10. As another example, the button 36 may be attached to the side of the earphone mounting portion 311 located adjacent to the core body 21.

In FIG. 23 schematically shows a core in some embodiments of the present invention. As shown in FIG. 23, the core 22 may include a magnetic shield 221, a magnet 222, a magnetic conductive plate 223, and a coil 224. The magnetic shield 221 may include a bottom plate 2211 and an annular side plate 2212 integrally connected to the bottom plate 2211. Further, the magnet 222 may located within the annular side plate 2212 and attached to the bottom plate 2211. The magnetic conductive plate 223 may be attached to the side of the magnet 2211 facing away from the bottom plate 2211. The coil 224 may be located in the magnetic gap 225 between the magnet 222 and the annular side plate 2212 and attached to the bracket 23 core. In some embodiments, the magnetic gap 225 between the magnet 222 and the annular side plate 2212 may be m, where m may be greater than or equal to the first gap or less than or equal to the second gap to balance the movement requirements of the coil 224 and the compactness of the core 22. For example, , m can be from 1.0 mm to 1.5 mm.

It should be noted that the core shown in FIG. 23 may correspond to the core module shown in FIG. 8 or the core module shown in FIG. 16. The core bracket shown in FIG. 23 is primarily intended to conveniently describe the relationship of the relative positional position of the core bracket and the core, which may further implicitly indicate a possible assembly method of the core bracket and the core.

In some embodiments, magnet 222 may be made of a metal alloy, ferrite, or the like. For example, the metal alloy magnet may be made of neodymium-iron-boron (NdFeB), samarium-cobalt, aluminum-nickel-cobalt, iron-chromium-cobalt, aluminum-iron-boron, iron-carbon-aluminum, or the like , or any combination thereof. The ferrite may be barium ferrite, steel ferrite, magnesium manganese ferrite, lithium manganese ferrite or the like, or any combination thereof. In some embodiments, magnet 222 may have a magnetization direction to produce a relatively stable magnetic field.

The magnetic conductive valve 221 and the magnetic conductive plate 223 can cooperate with each other to adjust the magnetic field generated by the magnet 222 to increase the utilization of the magnetic field. In some embodiments, the magnetic conductive shield 221 and the magnetic conductive plate 223 may be treated with a paramagnetic material such as metal materials, metal alloys, metal oxide materials, amorphous metal materials, etc. For example, the above-mentioned paramagnetic material may be iron, iron-silicon alloy, iron-aluminum alloy, iron-nickel alloy, iron-cobalt alloy, low-carbon steel, silicon steel sheet, rolled silicon steel sheet, ferrite, etc.

In such cases, coil 224 may be located in the magnetic field created by magnet 222, magnetic shield 221, and magnetic conductive plate 223. When driven by electrical signals, coil 224 may be subject to a current in Amperes. Coil 224 may cause mechanical vibration of core 22 when subjected to amperes of current. The core 22 may be secured to the core body 21 by the core bracket 23 such that the core body 21 can vibrate with the core 22. In this embodiment, the electrical resistance of the coil 224 may be constant (e.g., 8 ohms) to balance the force generation requirements current in Amperes and to the core circuit structure 22.

Based on the above detailed description, the volume of the core body 21 may be limited. The core body 21 may accommodate at least such structural elements as the core 22, the core bracket 23, the first microphone 25, etc. Although greater amperage can be obtained by increasing the size of the core 22 (e.g., increasing the volume of the magnet 222 and/or increasing the number of turns of the coil 224) to better drive the core body 21, the weight and volume of the core module 20 will increase, which is not conducive to reducing the weight of the core module 20. To this end, the core 22 can be improved and designed based on the formula based on the current in Amps F=BILsinθ, in some embodiments of the present invention. For example, parameter B may represent the strength of the magnetic field produced by magnet 222, magnetic shield 221, and magnetic conductive plate 223. Parameter L may represent the effective length of coil 224 in the magnetic field. The parameter θ can represent the angle between the direction of the current and the magnetic field lines. For example, the angle θ could be 90 degrees. The parameter I may represent the current in coil 224 at some point in time. For the designed, manufactured and assembled core 22, parameters B and L may be specified values. The parameter I may change depending on a change in the input electrical signal to the core 22. Accordingly, the optimized design of the core 22 can simply be considered as a force factor BL optimized design. The parameters B and L may depend on the design parameters (e.g., shape, size, etc.) of the magnet 222, the magnetic conductive body 221, and the magnetic conductive plate 223.

The influence of the design parameters (eg, shape, size, etc.) of the magnet 222, the magnetic conductive body 221 and the magnetic conductive plate 223 on the force coefficient BL can be discussed in detail. In some embodiments, magnet 222 may be cylindrical. In FIG. 24 is a graph illustrating the relationship between the force coefficient BL and the magnet shown in FIG. 23, in some embodiments of the present invention. As shown in FIG. 24, the abscissa represents the diameter φ of the magnet 222. The ordinate represents the thickness t1 of the magnet 222. It is certain that the larger the diameter φ of the magnet 222, the larger the value of the force coefficient BL. The greater the thickness t1 of the magnet 222, the greater the value of the force coefficient BL. In some embodiments, in order to cause the bone conduction earphone 10 to generate sufficient volume and high enough amperes to cause the coil 224 to vibrate, the force factor value BL may be greater than a predetermined force factor threshold. As an example only, the force factor could be 1.3. In some embodiments, based on a comprehensive consideration of the weight and volume of the core module 20 (eg, core 22), the diameter φ of the magnet 222 may be in the range of 10.5 mm to 11.5 mm. As another example, the diameter of the magnet 22 may be 10.8 mm. The thickness t1 of the magnet 222 may be greater than or equal to the first thickness and less than or equal to the second thickness. For example, the thickness t1 of the magnet 222 may range from 3.0 mm to 4.0 mm. In another example, the thickness t1 of the magnet 222 may be 3.5 mm.

In some embodiments, the diameter of the magnetic conductive plate 223 may be equal to the diameter of the magnet 222. The thickness of the magnetic conductive plate 223 may be equal to the thickness of the magnetic conductive shield 221. The material of the magnetic conductive plate 223 may be the same as the material of the magnetic conductive shield 221. In FIG. 25 is a graph illustrating the relationship between the thickness of the magnetic conductive screen and the magnetic conductive plate shown in FIG. 23, and the force coefficient BL in some embodiments of the present invention. As shown in FIG. 25, the abscissa represents the thickness t2 of the magnetic conductive screen 221. The ordinate represents the force coefficient BL. It is safe to say that within a certain range, the value of the force coefficient BL can increase as the thickness t2 increases. When t2 exceeds 0.8 mm, the change in the value of force coefficient BL may not be obvious. That is, after t2 exceeds 0.8 mm and continues to increase, the effect may be small, but the weight of the core 22 may increase. Accordingly, based on comprehensive consideration of the force coefficient BL (for example, greater than 1.3) and the weight and volume of the core module 20 (for example, the core 22), the thickness t2 of the magnetic conductive plate 223 and the magnetic conductive screen 221 may be greater than or equal to the third thickness and less than or equal to fourth thickness. For example, the thickness t2 may range from 0.4 mm to 0.8 mm. As another example, the thickness t2 may be 0.5 mm.

In some embodiments, the annular side plate 2212 may also be cylindrical. The diameter D of the annular side plate 2212 may be the sum of the diameter φ of the magnet 222 and twice the magnetic gap m. That is, the diameter D of the annular side plate 2212 can be determined in accordance with the equation D=φ+2m. In FIG. 26 is a graph illustrating the relationship between the height of the magnetic shield shown in FIG. 23, and the force coefficient BL in some embodiments of the present invention. As shown in FIG. 26, the abscissa represents the height h of the magnetic conductive shield 221 (eg, the annular side plate 2212). The ordinate represents the force coefficient BL. It is safe to say that in a certain range, the value of the force coefficient BL can increase as the height h of the magnetic conductive screen 221 increases. However, after the height h exceeds 4.2 mm, the value of the force coefficient BL can decrease as the height h of the magnetic conductive screen 221 increases. Therefore, , based on comprehensive consideration of the force coefficient BL (for example, greater than 1.3) and the weight and volume of the core module 20 (for example, the core 22), the height h of the magnetic conductive screen 221 may be greater than or equal to the first height and less than or equal to the second height. For example, the height h of the magnetic conductive shield 221 may be in the range of 3.4 mm to 4.0 mm. As another example, the height h of the magnetic conductive screen 221 may be 3.7 mm.

Referring to FIG. 1, bone conduction headphones 10 may include two core modules 20. One of the two core modules 20 may correspond to the core module shown in FIG. 8, and the other may correspond to the core module shown in FIG. 16. It should be noted that the specific structure of each core module 20 may be the same or similar to one of the above-mentioned embodiments, and its description may be referred to as the detailed description of any of the above-mentioned embodiments and will not be repeated here. In some embodiments, the number of core modules 20 may not be limited to two modules. For example, bone conduction headphones 10 may be provided with three or more core modules 20. As another example, in some application scenarios in which stereophonic requirements are not particularly high, such as hearing aids for hearing-impaired patients, a teleprompter for presenters, etc., bone conduction earphone 10 may also be provided with only one core module 20 . As yet another example, the earphone may further include an air conduction earphone (e.g., a single ear air conduction earphone) provided with a core module 20, and the air conduction earphone may be suspended from the user's auricle using a fastening component (e.g., ear hook assembly) and transmit the audio signal to the user through one or more sound conducting holes.

In some embodiments of the invention, magnet 222 may also be configured such that core module 20 can be attached to a magnetic object. For example, magnet 222 may be positioned adjacent the bottom wall 211 of the core housing 21 such that the core module 20 may have magnetization on a side close to the bottom wall 211. In such cases, the core module 20 may be attached to a magnetic object through the side of the bottom wall 211. The magnetic object is a metal element (for example, a bracket), a mobile device (for example, a mobile phone), a charger (for example, a magnetic charger), another core module (for example, two core modules 20 bonded to each other, as shown in 27), etc., which may be attracted by magnet 222, or the like, or any combination thereof.

Taking the magnetic object of a charger as an example, a magnetic suction connector may be provided on the bottom wall 211 of the main body 21. When the earphone is charging, the magnetic suction connector and the corresponding charger power interface can form a system. The magnetic suction connector and the corresponding charger power interface may be matched in structure to be attracted to each other, so that an electrical connection can be established to charge the earphone. For example, magnet 222 may be located on the inner side of the bottom wall 211 (i.e., on the side of the bottom wall 211 that faces away from the user's head) as part of a magnetic suction connector such that the magnetic suction connector can be attracted to the power interface of the charger. A charging terminal may be located on the outer side of the bottom wall 211 (ie, on the side of the bottom wall 211 facing the user's head). One side of the charging terminal may be electrically coupled to the power interface of the charger, and the other side may be coupled to the headphone battery 60 (eg, via an electrically conductive wire), so that the charging terminal can communicate with the power interface to charge the headphone. In some embodiments, a charging terminal may not be present. The earphone can be directly connected to the charger using the magnet 222 for wireless charging. Exemplary wireless charging methods may include electromagnetic induction wireless charging, magnetic field resonance wireless charging, radio wave wireless charging, solar charging or the like, or any combination thereof. In some embodiments, the charger may be a stationary charger, a mobile charger, or the like.

In some embodiments, bone conduction headphones 10 may include two core modules 20. Magnet 222 may be configured to allow two core modules 20 to be attracted to each other. In FIG. 27 schematically shows the state of the bone conduction headphones shown in FIG. 1 when not worn in some embodiments of the present invention. As shown in FIG. 27, the magnets 222 of the two core modules 20 may have different polarities on the side facing the bottom wall 211 of the core housing 21 in which the magnets 222 are located. When the bone conduction headphones 10 are not worn, the two core modules 20 may be attracted to each other. to a friend. Therefore, the user can store the bone conduction headphones 10. It should be noted that magnet 222 may also be configured to generate a magnetic field such that coil 224 may oscillate when driven by electrical signals. Vibrations from coil 224 may be transmitted to the auditory nerve through bone conduction and/or air conduction so that a person can hear sound. In this case, magnet 222 may become "one piece with two functions."

In some embodiments, prior to assembling the core modules 20, the magnets 222 may not be pre-magnetized. However, after the core modules 20 are assembled, the core modules 20 may be placed in a magnetizing device such that the magnets 222 become magnetic. After magnetization, the magnetic pole directions of the magnets 222 of the two core modules 20 may be as shown in FIG. 27. In such cases, since the magnets 222 are not magnetic prior to assembly, the magnetic force does not interfere with the assembly of the core modules 20. Accordingly, the efficiency and assembly speed of the core module 20 can be increased, which improves the performance and benefits of the bone conduction headphones 10.

In FIG. 28 is a schematic cross-sectional view of the rear hook assembly shown in FIG. 1, along the III-III direction in some embodiments of the present invention. As shown in FIG. 28, the rear hook assembly 40 may include a resilient metal wire 41, an electrically conductive wire 42, and an elastic sheath 43 that covers the resilient metal wire 41 and the electrically conductive wire 42. The elastic sheath 43 and the electrically conductive wire 42 may be a one-piece extruded structural member. . The elastic shell 43 may additionally contain a threaded channel (not indicated in Fig. 28). An elastic metal wire 41 can be inserted into the threaded channel. For example, a threaded channel may be formed during extrusion molding. In some embodiments, the material of the elastic metal wire 41 may be spring steel, titanium alloy, titanium-nickel alloy, chromium-molybdenum steel or the like, or any combination thereof. The material of the elastic shell 43 may be polycarbonate, polyamide, silica gel, rubber or the like, or any combination thereof, to balance the wearing comfort and the structural rigidity of the rear hook assembly 40.

It should be noted that since the elastic metal wire 41 is inserted into the elastic shell 43 through the threaded channel, the area where in FIG. 28 there is an elastic metal wire 41, which can be considered simply as a threaded channel in the elastic shell 43.

In some embodiments, the diameter of the threaded channel in the natural state may be less than the diameter of the elastic metal wire 41, so that after insertion, the elastic metal wire 41 can remain fixed in the elastic sheath 43. In such cases, it is possible to avoid "sagging" of the rear hook assembly 40 from - because there is too much gap between the elastic shell 43 and the elastic metal wire 41 (for example, when the rear hook assembly 40 is compressed by the user). The compactness of the rear hook assembly 40 can be improved.

In some embodiments, the number of electrically conductive wires 42 may be at least two strands. Each strand of electrically conductive wire 42 may include a metal wire and an insulating layer (not shown in FIG. 28) covering the metal wire. The insulating layer is designed to provide electrical insulation for metal wires.

In some embodiments, as shown in FIG. 1, 2, 4, 8 and 16, since the main control circuit board 50 and the battery 60 can be located in two ear hook assemblies 30, and the ear hook assemblies 30 shown in FIG. 2 and Fig. 4 may correspond to the left ear hook and right ear hook of the bone conduction earphone 10 respectively, the main control circuit board 50 and the battery 60 may be connected to each other through an electrical conductive wire 42 built into the back hook assembly 40, and the core module 20 (for example, core 22) corresponding to the ear hook assembly 30 located in FIG. 1 on the left, and the button 36 may be connected to the main control circuit board 50 located in the ear hook assembly 30 shown in FIG. 1 on the right, by means of an electrically conductive wire 42 built into the rear hook assembly 40. A core module 20 (eg, a core 22), a first microphone 25, and a second microphone 26 located in the ear hook assembly 30 shown in FIG. 1 on the right may further be connected to a battery 60 located in the ear hook assembly 30 shown in FIG. 1 on the left, by means of an electrically conductive wire 42 built into the rear hook assembly 40. Accordingly, the electrically conductive wires 42 may be configured to connect three circuits.

In FIG. 29 shows an exemplary flow diagram of a method for manufacturing a rear ear hook assembly in some embodiments. Based on the above detailed description, the rear hook assembly 40 of the present invention can be manufactured in accordance with the following process 2900.

In step S2910, an extrusion molding device and an electrically conductive wire are provided. The raw material for molding the elastic casing 43 is loaded into the extrusion molding device. During extrusion molding, operations with the raw material for molding the elastic casing 43 may include melt plasticization, die (or tip) extrusion, molding, cooling, drawing, etc. The number of electrically conductive wires 42 may be at least two strands to provide connections between the various electronic components of the bone conduction headphones 10. In some embodiments, each core 42 may include a metal wire and an insulation layer covering the metal wire to electrically insulate the metal wires.

In step S2920, the electrically conductive wire is placed into the extrusion molding device, so that the corresponding first semi-finished product is obtained from the elastic shell raw material and the electrically conductive wire during extrusion molding. The extrusion molding apparatus may be configured to supply the electrically conductive wire 42 to cause the elastic sheath 43 to cover the electrically conductive wire 42 during extrusion molding. In some embodiments, a mold core may be located at the tip of the extrusion molding apparatus to simultaneously form the aforementioned threaded channel within the resilient sheath 43 during the extrusion molding process. Accordingly, the first semi-finished product may be a one-piece structural part consisting of the elastic sheath 43 and an electrically conductive wire 42, and the interior of the resilient shell 43 may have a threaded channel extending along the axial direction of the resilient shell 43.

At step S2930, in accordance with the requirements for using the rear hook assembly, the first semi-finished product can be further cut into a second semi-finished product having a corresponding length. The actual length of the second semi may be slightly longer than the back hook knot length used. That is, the second semi-finished product may include some extra length to facilitate one or more subsequent processes.

In step S2940, an elastic metal wire may be placed in the threaded channel of the second semi-finished product to form a rear hook assembly. In some embodiments, after step S2940, the rear hook assembly may be formed into a curved structure shaped to adapt to the user's head. The two ends of the back hook assembly can be suitably processed to be rigidly connected to the ear hook assembly while providing circuit connections between the main circuit board, the battery, the button, the core, the first microphone and the second microphone. Therefore, the rear hook assembly manufactured in step S2940 may be essentially a semi-finished product.

With the above-described method, a semi-finished product (for example, a single piece composed of an elastic shell 43 and an electrically conductive wire 42) of large length can be manufactured at one time using an extrusion molding process. The interior of the elastic shell 43 may simultaneously include a threaded channel extending along the axial direction of the elastic shell 43. The semi-finished product can be cut into a plurality of small sections of appropriate lengths for subsequent processes, which can greatly improve the assembly efficiency of the rear hook assembly.

Possible beneficial effects of embodiments of the present invention include, but are not limited to: (1) the decorative element is designed to decorate the ear hook body, lead wire shielding, button shielding, and button actuation, thereby providing "one piece with four functions" ; (2) The magnet is designed so that when the headphones are not worn, the core modules can be attracted to each other, which is convenient for storage; (3) Parameters such as the shape and size of the magnet and related components are reasonably set, which can balance the vibration and light weight of the main module. It should be noted that different embodiments may provide different beneficial effects. In various embodiments of the invention, the possible beneficial effects may be any one beneficial effect or a combination of the above beneficial effects, or any other possible beneficial effects.

Having thus described the basic ideas of the invention, it will likely be apparent to those skilled in the art upon reading the present detailed description that the present detailed description is merely exemplary and is not intended to be limiting. Various changes, improvements and modifications will be apparent to those skilled in the art, although not expressly stated herein. Such changes, improvements, and modifications are contemplated by the present disclosure, and are within the spirit and scope of the exemplary embodiments of the present invention.

Moreover, certain terminology has been used to describe embodiments of the present invention. For example, the terms “one embodiment,” “an embodiment,” and/or “certain embodiments” mean that a particular feature, structure, or characteristic described in connection with an embodiment relates to at least one embodiment of the present invention. Accordingly, it is emphasized and should be taken into account that two or more references to "embodiment", "one embodiment" or "alternative embodiment" in different parts of the present description do not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics may be combined, as appropriate, in one or more embodiments of the present invention.

In addition, one skilled in the art will understand that aspects of the present invention may be illustrated and described herein in any of a number of patentable classes or contexts, including any new and useful process, machine, manufacture or composition of matter, or any new and useful improvement thereof. Accordingly, aspects of the present invention may be implemented entirely in hardware, entirely in software (including firmware, resident software, firmware, etc.), or a combination of software and hardware implementations, which may be generally referred to herein as a “block,” module", "device", "product", "component" or "system". In addition, aspects of the present invention may take the form of a computer program product embodied in one or more computer-readable media containing computer-readable program code embodied thereon.

In addition, the given order of elements or processing sequences or the use of numbers, letters or other designations, respectively, do not imply a limitation of the claimed processes and methods in any order, except as specifically stated in the claims. Although the foregoing description sets forth by various examples what are now considered to be many useful embodiments of the invention, it is to be understood that such detail is intended for illustration purposes only and that the appended claims are not limited to the embodiments described, but rather are intended to to cover modifications and equivalent devices that fall within the spirit and scope of the disclosed embodiments. For example, although the implementation of the various components described above may be embodied in a hardware device, it may also be implemented as a software-only solution—for example, installation on an existing server or mobile device.

Likewise, it should be understood that in the above description of embodiments of the present invention, various features are sometimes grouped together in one embodiment, drawing, or description thereof for the purpose of simplifying the disclosure to facilitate understanding of one or more different embodiments of the invention. This manner of disclosure, however, should not be interpreted as reflecting the opinion that the claimed subject matter requires more characteristics than are expressly stated in each claim. Rather, the claimed subject matter may not include all features of one of the embodiments disclosed above.

In some embodiments, numbers expressing quantities of ingredients, properties, etc., used to describe and claim certain embodiments of the invention should be understood as modified in some cases by the terms "within", "approximately" or "substantially" and etc. Unless otherwise indicated, "within", "approximately" or "substantially" may indicate a deviation of ±20% from the described value. Accordingly, in some embodiments, the numerical parameters set forth in the description and appended claims are approximate and may vary depending on the desired properties to be obtained in a particular embodiment of the invention. In some embodiments, the numeric data must respect specified significant digits and use an algorithm reserved for common digits. Although the numerical ranges and parameters intended to illustrate the broad scope of some embodiments of the present invention are approximate, the numerical values in specific examples may be as precise as reasonably practicable.

Claims (25)

1. An earphone comprising a core module including a core body and a core, wherein: the core body has a bottom wall and an annular peripheral wall, wherein when the user wears the earphone, the bottom wall faces the user's head, one end of the annular peripheral wall is integrally connected to the bottom wall, the other end of the annular peripheral wall, remote from the bottom wall, forms an opening , and the core is inserted into the core body through the hole; And the core includes a magnet configured such that the core module can be attached to a magnetic object through one side of the bottom wall, wherein the earphone comprises two core modules, the magnets of the two core modules having different polarities on the side facing the bottom wall of the core housing, and when the earphone is not put on, the two core modules are attracted to each other. 2. The earphone according to claim 1, in which the magnet has the shape of a cylinder, the diameter of the magnet is in the range from 10.5 mm to 11.5 mm, and the thickness of the magnet is in the range from 3.0 mm to 4.0 mm. 3. An earphone according to claim 1 or 2, in which the core additionally contains: a magnetic conductive screen including a bottom plate and an annular side plate integrally connected to the bottom plate, wherein a magnet is located in the annular side plate and attached to the bottom plate; a magnetic conductive plate attached to a side of the magnet facing away from the bottom plate, wherein the diameter of the magnetic conductive plate is equal to the diameter of the magnet, and the thickness of the magnetic conductive plate is equal to the thickness of the magnetic conductive shield, wherein the thickness of the magnetic conductive shield is in the range of 0.4 to 0.8 mm; And a coil located in the magnetic gap between the magnet and the annular side plate. 4. The earphone according to claim 3, in which the height of the annular side plate ranges from 3.4 mm to 4.0 mm; And The magnetic gap between the magnet and the annular side plate is in the range of 1.0 mm to 1.5 mm. 5. Earphone according to any one of paragraphs. 1-4, further comprising an ear hook assembly, wherein one end of the ear hook assembly is connected to a core module, wherein the ear hook assembly includes an ear hook body, wherein the ear hook body comprises: a housing container configured to accommodate a battery or a main control board; a fastening portion covering an open end of the core body to form a chamber for housing the core; And a curved transition portion connecting the housing container and the attachment portion and having a curved shape for hanging on the outside of the user's ear, in this case, the modulus of elasticity of the core body is greater than the modulus of elasticity of the ear hook body. 6. The earphone according to claim 5, wherein the attachment portion is provided with a reinforcing structure, wherein the ratio of the difference between the rigidity of the bottom wall and the rigidity of the attachment portion to the rigidity of the bottom wall is less than or equal to a predetermined ratio threshold. 7. The earphone according to claim 6, wherein the reinforcing structure includes a stiffener located at the attachment portion, and the material of the reinforcing structure includes a metal part, wherein the reinforcing structure and the earphone attachment portion are integrally formed by injection molding of the metal insert. 8. Earphone according to any one of paragraphs. 5-7, in which the core module further comprises a cover, wherein the cover covers the hole of the annular peripheral wall of the core body, and the fastening portion covers the side of the cover facing away from the core body, the elastic modulus of the cover is greater than the elastic modulus of the ear hook body and less than or equal to the elastic modulus of the body core. 9. Earphone according to any one of paragraphs. 5-8, in which the ear hook assembly further includes a decorative bracket, wherein: a first groove is disposed on the curved transition portion, wherein a decorative bracket is inserted and fixed in the first groove to form a wire channel so that a wire passes from the core module into the housing container through the wire channel, in the earphone mounting area, a hole for adapting a button is located, wherein the hole for adapting the button communicates with one end of the first groove; And the ear hook assembly further includes a button, wherein the button is located on another side of the ear hook body that faces away from the decorative bracket and protrudes outward through said button adaptation hole, wherein the decorative bracket extends to the top of the button in a cantilever manner and is configured with the ability to actuate the button when an external force is applied to it, while the button protrudes outward through the hole for adapting the button.