WO2023039907A1 - Bone conduction earphone and method for assembling bone conduction earphone - Google Patents

Abstract

Disclosed are a bone conduction earphone and a method for assembling a bone conduction earphone. The bone conduction earphone comprises: a first bone conduction sound generating apparatus (60); a second bone conduction sound generating apparatus (61); a control compartment (71), which comprises a main control board (712) that controls the first bone conduction sound generating apparatus (60) and the second bone conduction sound generating apparatus (61); and a battery compartment (70), which comprises a power supply (702) for supplying power to the first bone conduction sound generating apparatus (60), the second bone conduction sound generating apparatus (61), and the main control board (712). The bone conduction earphone of the present invention has a more compact structure and is more convenient and efficient to assemble.

Description

Bone conduction earphone and bone conduction earphone assembly method technical field

The invention relates to the technical field of loudspeakers, in particular to a bone conduction earphone and a method for assembling the bone conduction earphone.

Background technique

Bone conduction earphones are earphones manufactured using bone conduction sound transmission, which includes a bone conduction sounding device for sound generation. Compared with the traditional way of conducting sound through sound waves, bone conduction sound transmission directly passes through bones. The vibration is transmitted to the auditory nerve, eliminating many steps of sound wave transmission, so the ears can be opened without damaging the eardrum, and clear sound reproduction can be achieved in a noisy environment, and the sound wave will not be affected by the diffusion in the air. Others are therefore loved by consumers.

Existing bone conduction earphones often have complex structures and large volumes. For example, there are many parts in the bone conduction sounding device, and the assembly process of the bone conduction sounding device and the bone conduction earphone is complicated. The miniaturization of the bone conduction sound-generating device will lead to restrictions on the installation of its internal components, making the installation of its internal components more inconvenient. In addition, the sound quality of the existing bone conduction earphones is not ideal, especially the low frequency performance is poor.

Therefore, it is necessary to improve the prior art to overcome the defects in the prior art.

Contents of the invention

The object of the present invention is to provide a bone conduction earphone and a method for assembling the bone conduction earphone. The structure of the bone conduction earphone is more compact and the installation is more convenient.

In order to achieve the purpose of the above invention, in the first aspect, the present invention proposes a bone conduction earphone, including:

The first bone conduction sound device;

A second bone conduction sound generating device;

A control compartment, including a main control board for controlling the first bone conduction sounding device and the second bone conduction sounding device; and

A battery compartment, including a power supply for supplying power to the first bone conduction sounding device, the second bone conduction sounding device and the main control board;

Wherein, the first bone conduction sounding device and the second bone conduction sounding device both include:

The housing includes a cavity and a wiring hole communicating with the cavity, and one end of the cavity is open;

a cover connected to the housing and sealing the opening;

a magnetic circuit assembly connected to the cover and located in the cavity;

a voice coil assembly disposed in the cavity, the voice coil assembly is disposed opposite to the magnetic circuit assembly, and is used to drive the magnetic circuit assembly to vibrate; and

The circuit board is arranged in the cavity, is electrically connected to the voice coil assembly, and is electrically connected to the main control board and the power supply through the wiring hole.

Further, the bone conduction earphone also includes:

A neckband connected between the control compartment and the battery compartment;

a first earhook connected between the battery compartment and the first bone conduction sound-generating device; and

The second ear hook is connected between the control compartment and the second bone conduction sounding device.

Further, the battery compartment further includes a battery box, a circuit board electrically connected to the power supply, and a battery box cover sealing the battery box, and the power supply and the circuit board are both arranged in the battery box.

Further, the neckband includes a first cable electrically connected between the circuit board and the main control board;

The first earhook includes a second cable, the second cable is electrically connected between the circuit board of the first bone conduction sound generating device and the circuit board;

The second ear hook includes a third cable electrically connected between the circuit board of the second bone conduction sound generating device and the main control board.

Further, the main control board is provided with tact switches, and the control compartment is provided with keys corresponding to the tact switches.

Further, the control compartment includes a control box, a control box cover that seals the control box, and a light-emitting element arranged on the main control board, the main control board is arranged in the control box, and the The light from the light emitting element can be observed from the outside of the control cabin.

Further, the voice coil assembly includes a coil, a first magnetic conductor and a first magnetic member, and both the coil and the first magnetic member are connected to a side of the first magnetic conductor close to the magnetic circuit assembly. side;

The magnetic circuit assembly includes a shrapnel connected to the cover, a second magnetic member connected to the shrapnel, and a second magnetic member connected to the second magnetic member near the voice coil assembly;

After the coil is energized, an electromagnetic field with a changing polarity is generated, and the electromagnetic field produces a changing attractive force and a repulsive force on the second magnetic part, and the second magnetic part is under the action of the attractive force and the repulsive force Drive the shrapnel to reciprocate and vibrate.

Further, the first magnetic part and the second magnetic part are arranged opposite to each other in the same pole, there is a first attraction force between the first magnetic part and the second magnetically permeable part, and the second magnetic part and the second magnetic part There is a second attraction force between the first magnetic member; when the coil is not energized, the resultant force of the first attraction force and the second attraction force and the force between the first magnetic member and the second magnetic member The repelling force is equal.

Further, the elastic piece includes a body, an outer ring body surrounding the body, and several connecting arms connected between the body and the outer ring body, the outer ring body is connected to the cover, The body is connected with the second magnetic conducting member.

Further, the connecting arm is suspended and not in contact with the second magnetically conductive member.

Further, the magnetic circuit assembly further includes a low-frequency adjusting plate connected between the body and the second magnetically conductive member, and the low-frequency adjusting plate is not in contact with the connecting arm.

Further, the cover is provided with an avoidance hole for avoiding the movement of the main body and the connecting arm.

Further, the housing includes a base shell part opposite to the cover body and a side shell part connected to the base shell part, and the cover body is connected to the side shell part.

Further, the housing further includes a support seat connected to the side shell portion, the support seat defines a limiting groove, and the outer ring body is at least partially fitted in the limiting groove.

Further, the housing further includes reinforcing ribs connected between the support seat, the base shell part and the side shell part;

The number of the reinforcing rib is one; or.

The number of the reinforcing ribs is multiple, and the multiple reinforcing ribs are arranged at intervals.

Further, the housing further includes a supporting boss located in the cavity, the first magnetic guide member is installed on the supporting boss, and forms a space between the base shell part and the base shell part for accommodating the The mounting space of the circuit board.

Further, the contact surface between the cover body and the user's body has a normal line A, and the included angle between the vibration axis B of the magnetic circuit assembly and the normal line A is any value between 0° and 35° .

Further, the included angle is any value between 0° and 10°.

Further, the cover body includes a flexible layer for contacting with the user's skin, and the thickness of the flexible layer is 0.2-1 mm.

Further, the thickness of the flexible layer is 0.4-0.5mm.

Further, the Young's modulus of the shell and the cover is ≥2GPa.

Further, the Young's modulus of the shell and the cover is any value between 8GPa and 25GPa.

Further, the circuit board of the first bone conduction sound generating device includes a first microphone for receiving the voice of the user and a second microphone for receiving ambient sound; The first microphone hole and the second microphone hole corresponding to the second microphone.

Further, the distance between the center of the first microphone hole and the center of the second microphone hole is not less than 15mm.

Further, the included angle between the positive directions of the axes of the first microphone hole and the second microphone hole is not less than 70°.

Further, the included angle between the positive directions of the axes of the first microphone hole and the second microphone hole is 90°.

Further, neither the positive direction of the axes of the first microphone hole nor the second microphone hole is blocked by the auricle.

Further, the bone conduction earphone also includes a first waterproof and breathable membrane and a second waterproof and breathable membrane, the first waterproof and breathable membrane seals the first microphone hole, and the second waterproof and breathable membrane Seal the second microphone hole.

Further, the second bone conduction sound generating device includes a button assembly, and the button assembly includes a switch disposed on the circuit board and a pressing panel connected to the outer surface of the housing for pressing to trigger the switch .

Further, the button assembly includes a base connected to the housing and a pressing part connected to the base, one end of the pressing part is connected to the base, and the other end is suspended in the air, the pressing part includes a The position of the switch corresponds to a protrusion protruding toward the switch, and the housing is provided with a through hole corresponding to the position of the switch.

Further, the button assembly further includes a flexible pad that seals the avoidance through hole, and a pressing piece located between the flexible pad and the switch.

In a second aspect, the present invention proposes a bone conduction earphone assembly method for assembling the bone conduction earphone as described above. The bone conduction earphone assembly method includes the steps of: assembling a bone conduction sounding device and an earhook, the The steps for assembling the bone conduction sounding device and the earhook include the following steps:

installing the circuit board in the housing;

installing ear hooks on the housing and electrically connecting them to the circuit board;

installing a voice coil assembly in the casing, and electrically connecting the coil of the voice coil assembly to the circuit board;

The magnetic circuit assembly is installed on the cover, and the cover with the magnetic circuit assembly is installed on the housing.

Further, through the steps of assembling the bone conduction sounding device and the earhook, a first bone conduction sounding device connected to the first earhook and a second bone conduction sounding device connected to the second earhook are obtained, the bone conduction earphone The assembly method also includes the following steps:

Connect the battery box and the control box to the two ends of the neckband respectively;

connecting the first ear hook to the battery box, and connecting the second ear hook to the control box;

The battery box and the control box are assembled into a battery compartment and a control compartment respectively.

Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the magnetic circuit assembly is set to be connected with the cover body, and the voice coil assembly is set to be connected to the casing, therefore, when assembling, the casing can be installed first Install the circuit board in the body, then install the earhook and voice coil assembly, and connect the lead wire of the coil to the circuit board; finally install the cover connected with the magnetic circuit assembly to the shell to realize the installation of the bone conduction sound device and its connection with the The connection of the earhook has a simpler and more compact overall structure and more convenient assembly; furthermore, the bone conduction earphone of the present invention is provided with a neck-wearing wire, a first earhook and a second earhook, which is more convenient to wear, and the structure Smaller and more compact.

Description of drawings

Fig. 1 is a schematic structural diagram of a bone conduction earphone according to an embodiment of the present invention.

Fig. 2 is an exploded schematic diagram of a bone conduction sound generating device according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of a bone conduction sound generating device according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of a housing in an embodiment of the present invention.

Fig. 5 is a schematic structural view of a cover body in an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a voice coil assembly according to an embodiment of the present invention.

Fig. 7 is a schematic cross-sectional view of a magnetic circuit assembly according to an embodiment of the present invention.

Fig. 8 is a schematic structural view of a shrapnel according to an embodiment of the present invention.

Fig. 9 is a schematic diagram of the connection between the elastic piece and the cover in an embodiment of the present invention.

Fig. 10 is a schematic structural view of the upper support seat part of the housing in an embodiment of the present invention.

Fig. 11 is a top view of a casing in an embodiment of the present invention.

Fig. 12 is a schematic structural diagram of a circuit board according to an embodiment of the present invention.

Fig. 13 is a structural schematic diagram of a circuit board installed in a casing according to an embodiment of the present invention.

Fig. 14 is a structural schematic diagram of another viewing direction of the voice coil assembly in Fig. 6 .

Fig. 15 is a structural schematic diagram of another embodiment of the housing in the present invention.

Fig. 16 is a schematic cross-sectional view of the button assembly connected to the housing in an embodiment of the present invention.

Fig. 17 is a schematic structural view of a pressing panel according to an embodiment of the present invention.

Fig. 18 is a schematic diagram of a shell connected with a flexible pad and a pressing member according to an embodiment of the present invention.

Fig. 19 is a schematic structural view of a bone conduction sound generating device provided with a first microphone hole and a second microphone hole according to an embodiment of the present invention.

Fig. 20 is an exploded view of a casing, a circuit board, a first waterproof and breathable membrane and a second waterproof and breathable membrane according to an embodiment of the present invention.

Fig. 21 is a schematic diagram of a bone conduction sound generating device in an embodiment of the present invention when it touches a human body part.

Fig. 22 is a graph showing the frequency response curve of a bone conduction earphone according to an embodiment of the present invention as a function of the thickness of the flexible layer.

FIG. 23 is a graph showing the relationship between the high frequency resonant peak cutoff frequency and the thickness of the flexible layer in FIG. 22 .

Fig. 24 is a graph showing the variation of the frequency response curve of the bone conduction earphone according to the Young's modulus of the shell part according to an embodiment of the present invention.

Fig. 25 is a frequency response curve diagram of a bone conduction earphone according to an embodiment of the present invention.

Fig. 26 is an exploded view of the battery compartment in the present invention.

Fig. 27 is an exploded view of the control chamber in the present invention.

Fig. 28 is an exploded view of the neck-worn wire, the battery box and the control box in the present invention.

Fig. 29 is a schematic diagram of the connection between the first earhook and the housing in the present invention.

Fig. 30 is a schematic diagram of the connection between the second earhook and the housing in the present invention.

Detailed ways

In order to make the above purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only some structures related to the present application are shown in the drawings but not all structures. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

The terms "comprising" and "having" and any variations thereof in this application are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or apparatuses.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

As shown in Figure 1, a bone conduction earphone corresponding to a preferred embodiment of the present invention includes a sounding component 6 and a neck wearing component 7 connected to the sounding component 6, wherein the sounding component 6 is used to vibrate and sound, and the neck The wearing component 7 is mainly used to relatively fix the bone conduction earphone and the human head to prevent the bone conduction earphone from falling off. Meanwhile, the neck wearing component 7 is also integrated with energy supply and control functions.

Specifically, the sound generating assembly 6 includes at least one bone conduction sound generating device. In this embodiment, there are two bone conduction sound generating devices, which are the first bone conduction sound generating device 60 and the second bone conduction sound generating device 61 . When worn, the first bone conduction sound generating device 60 and the second bone conduction sound generating device 61 are respectively attached to the vicinity of the left ear and the right ear (usually in contact with the temporal bone). It can be understood that the positions of the first bone conduction sounding device 60 and the second bone conduction sounding device 61 can also be interchanged, that is, it can also be designed so that when worn, the first bone conduction sounding device 60 is located near the right ear , while the second bone conduction sound generating device 61 is located near the left ear.

The specific structure of the bone conduction sound generating device is as follows, referring to Fig. 2 to Fig. 21, it includes a housing 1, a cover 2 connected to the housing 1, and a magnetic circuit assembly 3 arranged between the housing 1 and the cover 2, Voice coil assembly 4 and circuit board 5.

Wherein, as shown in FIG. 3 , the housing 1 includes a base shell portion 14 and an annular side shell portion 15 protruding outward from the outer edge of the base shell portion 14, and the base shell portion 14 and the side shell portion 15 are formed between the base shell portion 14 and the side shell portion 15. In the cavity 10 for accommodating the magnetic circuit assembly 3, the voice coil assembly 4 and the circuit board 5, the end of the cavity 10 away from the base shell portion 14 has an opening, so as to facilitate the insertion of the magnetic circuit assembly 3, the voice coil assembly 4 and the circuit board 5 .

The cover 2 is connected to the side shell portion 15 of the housing 1 and is located at the opening end of the cavity 10 , and after the cover 2 is connected to the housing 1 , it seals the opening.

The connection method between the cover body 2 and the housing 1 is not limited. In this embodiment, the cover body 2 and the side shell part 15 are fixed by gluing. Specifically, referring to FIG. 4 and FIG. 5 , the cover body 2 is set There is an outwardly protruding annular boss 22, and an indented annular groove 150 is provided at the end of the side shell portion 15. The annular boss 22 is matched with the annular groove 150 and can be inserted into the annular groove 150, and the annular groove 150 is provided with glue , so that the cover body 2 can be reliably connected with the side shell portion 15 . Preferably, there is a gap between the annular groove 150 and the annular boss 22, so that there is a sufficient amount of glue between the two, and the connection is stronger. The housing 1 is also provided with a first positioning hole 151, and the cover body 2 is provided with a first positioning post 26 corresponding to the first positioning hole 151. The first positioning post 26 is matched with the first positioning hole 151. During installation, the first positioning hole 151 and the first positioning column 26 can cooperate with the guide cover body 2 to be installed on the housing 1, and the first positioning hole 151 and the first positioning column 26 can also improve the assembly of the housing body 1 and the cover body 2 Accuracy, improve the connection strength after the installation is completed. The number of the first positioning posts 26 is not limited, and in this embodiment, the number is four, and correspondingly, the number of the first positioning holes 151 is also four.

The magnetic circuit assembly 3 and the voice coil assembly 4 are arranged oppositely in the cavity 10, wherein the magnetic circuit assembly 3 is connected to the cover body 2, and the voice coil assembly 4 is connected to the housing 1, which is closer to the base than the magnetic circuit assembly 3. Shell part 14. The connections between the magnetic circuit assembly 3 and the cover body 2 and between the voice coil assembly 4 and the casing 1 can be connected by, for example, adhesive connection. As shown in Figure 3, the voice coil assembly 4 is used to drive the magnetic circuit assembly 3 to vibrate, it is electrically connected with the circuit board 5, and is powered by the circuit board 5, and the circuit board 5 controls the magnitude and direction of the current input into the voice coil assembly 4 and other parameters can control the magnetic circuit assembly 3 to generate vibrations of different amplitudes and frequencies, and when the cover 1 contacts the face of the human body, the human can receive different sounds through solid-state acoustic transmission.

Obviously, in order not to affect the vibration of the magnetic circuit assembly 3 , there is a space 33 between the magnetic circuit assembly 3 and the voice coil assembly 4 .

The circuit board 5 is preferably arranged at the bottom of the cavity 10 (the bottom of the cavity 10 refers to the end close to the base shell part 14), and is located between the base shell part 14 and the voice coil assembly 4, so that the shell can be fully utilized The inner space of the body 1, and the circuit board 5 and the voice coil assembly 4 can be installed in sequence, making the installation more convenient. In this embodiment, a wiring hole 11 communicating with the cavity 10 is also provided on the housing 1, and wiring can be routed through the wiring hole 11 to electrically connect the circuit board 5 to an external circuit, for example, it can be connected to the neck wearing assembly 7. The internal power supply is electrically connected to the control board, so that the voice coil assembly 4 can be powered, and parameters such as current and voltage input to the voice coil assembly 4 can be changed according to the control signal. Since the control board, power supply and other components do not need to be arranged in the cavity 10, the volume of the bone conduction sound generating device can be greatly reduced, and the installation of internal components is facilitated.

It can be understood that in the bone conduction sounding device of the present invention, the magnetic circuit assembly 3 is connected to the cover body 2 as a whole, and the voice coil assembly 4 is connected to the housing 1 as a whole. Install the circuit board 5 and the voice coil assembly 4 in the housing 1, and then install the cover 2 with the magnetic circuit assembly 3 on the housing 1 to complete the installation of the bone conduction sound generating device, which is very convenient to install. In addition, since both the magnetic circuit assembly 3 and the voice coil assembly 4 can be assembled outside the casing 1, and then connected to the cover 2 or the casing 1 after assembly, both are assembled in an open environment, so their respective Installation is also very easy.

As a preferred embodiment, in this embodiment, as shown in Figure 3 and Figure 6, the voice coil assembly 4 includes a coil 40, a first magnetic member 41 and a first magnetic member 42, the first magnetic member 42 and the coil 40 are all connected to the first magnetic conductor 41, and are connected to the side of the first magnetic conductor 41 close to the magnetic circuit assembly 3, the connection mode between the first magnetic member 42 and the coil 40 and the first magnetic conductor 41 It is not limited, for example, it may be an adhesive connection. As shown in FIG. 7 , the magnetic circuit assembly 3 includes an elastic piece 30 connected to the cover body 2 , a second magnetic conductor 31 connected to the elastic piece 30 , and a second magnetic conductor 31 connected to the side of the second magnetic conductor 31 close to the voice coil assembly 4 . The magnetic part 32 , between the elastic piece 30 and the second magnetic conducting part 31 and between the second magnetic part 32 and the second magnetic conducting part 31 can also be connected by glue. Since the elastic piece 30 is elastic, it can elastically deform after being stressed, thereby enabling the magnetic circuit assembly 3 to vibrate.

The coil 40 has lead wires, which are connected to the circuit board 5 through the lead wires to realize the electrical connection between the circuit board 5 and the coil 40 . After the coil 40 is energized, an electromagnetic field will be generated. By controlling the magnitude and direction of the current in the coil 40 and other related parameters, the direction and strength of the electromagnetic field can be changed, thereby generating an electromagnetic field with periodic or non-periodic changes in polarity. The magnetic part 32 generates a periodic or non-periodic attractive or repulsive force, thereby driving the second magnetic part 32 to drive the elastic piece 30 to reciprocate periodic or non-periodic vibration. By controlling parameters such as the vibration amplitude and frequency of the magnetic circuit assembly 3 through the coil 40 , the person wearing the bone conduction sound generating device can hear the corresponding sound.

The first magnetic piece 42 and the second magnetic piece 32 are magnets, which can attract ferromagnetic substances, while the first magnetically conductive piece 41 and the second magnetically conductive piece 31 do not have magnetism, but can be attracted by magnets. The first magnetically conductive piece 41 and the second magnetically conductive member 31 may be, for example, ferromagnetic metals such as iron, nickel, and cobalt. The first magnetic piece 42 and the second magnetic piece 32 are oppositely arranged with the same pole, that is, the polarities of the two magnetic poles where the first magnetic piece 42 and the second magnetic piece 32 are close to each other are the same, which makes the first magnetic piece 42 and the second magnetic piece 42 The members 32 have mutual repulsive forces. Since the first magnetic member 41 and the second magnetic member 31 can be attracted by magnets, a first attraction force will be generated between the first magnetic member 42 and the second magnetic member 31, and the second magnetic member 32 and the second magnetic member 31 will generate a first attraction force. A second attraction force will be generated between a magnetic conducting member 41 . Preferably, the resultant force of the first suction force and the second suction force is equal to the repulsion force, which makes the shrapnel 30 in a force-balanced state, does not generate internal stress, and can better respond to changes in magnetic force caused by changes in the magnetic field to vibrate , to achieve a better fidelity effect. The magnetic energy levels of the first magnetic part 42 and the second magnetic part 32 can be the same, for example, both magnetic energy levels are N48; The grade is N35, and vice versa. In specific applications, the magnetic energy levels of the first magnetic member 42 and the second magnetic member 32 can be dynamically adjusted according to the required attractive and repulsive forces.

The coil 40 is annular and has a central hole 400 . As a preferred embodiment, the first magnetic member 42 is disposed in the central hole 400 of the coil 40 . As a preferred embodiment, the shape of the outer peripheral surface of the first magnetic member 42 is consistent with the shape of the central hole 400. It can be understood that, when the size of the central hole 400 is constant, the size of the gap between the outer peripheral surface of the first magnetic member 42 and the inner wall of the central hole 400 determines the volume of the first magnetic member 42, and then determines the first magnetic member 42. The magnitude of the magnetic force between the component 42 and the second magnetic component 32 , generally, the smaller the gap, the larger the volume of the first magnetic component 42 and the greater the magnetic force, and vice versa. The smaller the gap, the greater the difficulty of assembly. As a preferred embodiment, the gap between the outer peripheral surface of the first magnetic member 42 and the inner wall of the central hole 400 is more than 0.05mm, so that the first magnetic member 42 is more convenient. Install. Further, the height of the first magnetic part 42 is set to be not higher than the height of the coil 40, so that the distance between the coil 40 and the second magnetic part 32 is closer, so that the magnetic circuit assembly 3 can respond more sensitively to the coil 40 Vibrates due to changes in the magnetic field.

The shapes of the first magnetic conductor 41 and the second magnetic conductor 31 are not limited. In a preferred embodiment, the first magnetic conductor 41 and the second magnetic conductor 31 are both plate-shaped, as shown in FIG. 6 The state when the first magnetic conductor 41 is plate-shaped; The protruding ring portion 311, a housing cavity 313 is formed between the ring portion 311 and the plate portion 310, the second magnetic member 32 of the magnetic circuit assembly 3 is accommodated in the housing cavity 313 of the second magnetic conducting member 31, and the voice coil assembly 4 The coil 40 and the first magnetic member 42 are accommodated in the accommodation chamber 313 of the first magnetically conductive member 41. Referring to FIG. 7, FIG. . In other embodiments, one of the first magnetically conductive member 41 and the second magnetically conductive member 31 is plate-shaped, and the other includes a plate portion 310 and a ring portion 311 protruding from the plate portion 310 . In this embodiment, the first magnetically conductive member 41 is plate-shaped, and the second magnetically conductive member 31 includes a plate portion 310 and a ring portion 311 protruding from the plate portion 310 .

As a preferred embodiment, as shown in FIG. 8 , the elastic piece 30 is in the shape of a sheet as a whole, which includes a main body 300 , an outer ring body 301 surrounding the outside of the main body 300 , and a ring connected between the main body 300 and the outer ring body 301 . Several connecting arms 302 (in this embodiment, the number of connecting arms 302 is 4), wherein the outer ring body 301 is used to connect with the cover body 2 and the housing 1, and the body 300 is connected with the second magnetically conductive member 31 . When the magnetic circuit assembly 3 vibrates, the outer ring body 301 is fixed, and the elastic deformation of the connecting arm 302 realizes the displacement of the main body 300 , the second magnetic conducting member 31 , and the second magnetic member 32 during vibration.

As shown in Fig. 5, Fig. 8 and Fig. 9, the cover body 2 has a connection surface 20 for bonding with the outer ring body 301, and the first surface of the outer ring body 301 and the connection surface 20 are preferably connected by gluing, The connecting surface 20 is provided with an outwardly protruding positioning shaft 21, and the outer ring body 301 is provided with a first positioning through hole 3010 adapted to the positioning shaft 21, which is realized by matching the positioning shaft 21 and the first positioning through hole 3010. The positioning of the shrapnel 30 makes the position accuracy of the shrapnel 30 better, and it will not be shifted or shifted during the movement. The number of positioning shafts 21 is not limited. In this embodiment, the number of positioning shafts 21 is four, and correspondingly, the number of positioning through holes 3010 is also four.

It can be understood that, in order to enable the elastic piece 30 to deform toward the side where the cover body 2 is located, an avoidance hole 23 is opened on the surface of the cover body 2 opposite to the elastic piece 30 to provide the space required by the main body 300 and the connecting arm 302 when vibrating .

In order to make the fixing of the elastic piece 30 more reliable, except that the first surface of the outer ring body 301 of the elastic piece 30 is connected to the cover body 2, the second surface of the outer ring body 301 facing away from the first surface is supported by the housing 1 And connected to the housing 1, so that the two sides of the elastic piece 30 are respectively fixed by the cover 2 and the housing 1, and the fixing of its position is more reliable.

Specifically, referring to FIG. 4 and FIG. 10 , the casing 1 is provided with a support seat 152 for supporting the elastic piece 30 , and the support seat 152 is located in the cavity 10 and connected to the side shell portion 15 . The support seat 152 is at least supported on the part where the outer ring body 301 is connected to the connecting arm 302, and its number is not limited. In this embodiment, there are two support seats 152, which are symmetrically supported on both sides of the shrapnel 30. In other embodiments Among them, the number of supporting seats 152 can be more, and then more parts of the elastic piece 30 can be supported. The support base 152 is provided with a limiting groove 1520, the outer ring body 31 is fitted in the limiting groove 1520, and a second positioning through hole corresponding to the position of the above-mentioned first positioning through hole 3010 is provided on the bottom surface of the limiting groove 1520 1521 , after the installation is completed, the positioning shaft 21 of the cover body 2 passes through the first positioning through hole 3010 and is fitted into the second positioning through hole 1521 at the same time, thereby further improving the firmness of the installation of the elastic piece 30 .

In order to enhance the firmness of the connection, the elastic piece 30 is bonded to the cover body 2 by double-sided tape, and glued to the support seat 152 by glue. Further, a recessed glue overflow groove is provided on the bottom surface of the limiting groove 1520 1522 , the glue overflow groove 1522 communicates with the second positioning through hole 1521 to accommodate more glue and enhance the firmness of bonding.

As a preferred embodiment, the upper end of the support seat 152 exceeds the upper end of the side shell part 15, so that when the cover body 2 is installed, the alignment installation of the elastic piece 30 and the support seat 152 is more convenient, and the installation magnetic circuit can also be increased. Space for component 3.

As shown in FIG. 10 , the housing 1 also includes a reinforcing rib 153 connected to the support seat 152. The reinforcing rib 153 is supported on the bottom of the support seat 152 and connected to the side shell part 15 and the base shell part 14, so as to strengthen the support seat 152. Rigidity provides reliable support for the shrapnel 30. The number of reinforcing ribs 153 may be one or more. In the case of multiple reinforcing ribs 153 , multiple reinforcing ribs 153 are arranged at intervals, and there is a space between two adjacent reinforcing ribs 153 . The structure of a plurality of reinforcing ribs 153 arranged at intervals can prevent the appearance of the housing 1 from shrinking due to local over-thickness of the plastic, and is convenient for controlling the molding quality.

In order to allow the connecting arm 302 to be fully elastically deformed, so that the main body 300 has a greater amplitude, the connecting arm 302 is suspended in the air, and it does not contact the second magnetic conducting member 31, thereby avoiding the second magnetic conducting member 31 from hindering the connection. Deformation of the arm 302. In a preferred embodiment, as shown in FIG. 7 , a low-frequency adjustment plate 312 is provided between the second magnetically conductive member 31 and the body 300 , and the low-frequency adjustment plate 312 is in contact with the body 300 but not with the connecting arm 302 , Thereby separating the second magnetic conducting part 31 and the connecting arm 302, preventing the two from contacting; the low-frequency adjustment plate 312 can be an independent component, or can be integrally formed with the second magnetic conducting part 31 or the body 300, at this time , the low-frequency adjusting plate 312 is the second magnetically conductive member 31 or the protruding part of the main body 300 . The setting of the low-frequency adjusting plate 312 can make the vibration amplitude of the magnetic circuit assembly 3 larger, thereby improving the low-frequency sound effect and sound quality of the bone conduction sound generating device.

Similarly, the cover body 2 is also set not to be in contact with the connecting arm 302. At this time, the connecting surface 20 is set not to exceed the inner peripheral surface of the outer ring body 301. Preferably, the outline of the connecting surface 20 and the outer ring body 301 same.

In order to facilitate the installation of the circuit board 5, as shown in FIGS. The positioning post 16 fits into the circuit board positioning hole 56 , so as to position the circuit board 5 through the matching of the third positioning post 16 and the circuit board positioning hole 56 . The connection mode between the circuit board 5 and the base shell portion 14 is not limited. For example, when the circuit board 5 is installed, the surface of the circuit board 5 can be coated with glue or the double-sided adhesive can be pasted on the circuit board 5 first, and then through the second The three positioning posts 16 are installed on the base shell part 14 to ensure the accuracy of the position of the circuit board 5; The deformation causes the circuit board 5 to be fixed on the base shell part 14; for another example, the circuit board 5 can be fixed on the base shell part 14 by fasteners such as screws.

Further, as shown in FIG. 10 and FIG. 11 , in order to facilitate the installation of the first magnetic conductor 41 , the base shell part 14 is also provided with a support boss 17 protruding toward the cavity 10 , and the support boss 17 includes a support for the first A support surface 170 of the magnetic guide 41 . Since the supporting boss 17 forms an installation space for accommodating the circuit board 5 between the first magnetic conducting member 41 and the base shell portion 14, the first magnetic conducting member 41 will not press the circuit board 5, and the circuit board 5 can be used more easily. In order to be reliable, at the same time, the internal structure design of the bone conduction sound generating device is more reasonable and compact. Several fourth positioning columns 173 are also arranged on the support boss 17. As shown in FIG. The hole 412, through the fitting of the fourth positioning post 173 and the mounting hole 412, can make the first magnetic guide 41 be positioned on the support boss 17, preferably, one or more of the fourth positioning posts 173 are heat-fused The column can fix the first magnetic conductor 41 on the support boss 17 by thermal melting.

It should be pointed out that the supporting boss 17 can be a closed ring or a discontinuous ring, as shown in FIG. , so as to eliminate the internal stress of the support boss 17 during molding, so as to make it more accurate, and at the same time, it can also facilitate the layout of the circuit board 5, for example, the circuit board 5 can be made as close as possible to the wiring hole 11.

The circuit board 5 is electrically connected with the lead wire of the coil 40 and the external circuit. In order to facilitate the lead wire of the coil 40, as shown in FIG. (In other embodiments, it may also be an avoidance hole). In this way, the lead wire is arranged in the avoidance groove 410, no bending or less bending is required, and wiring is more convenient. As a preferred embodiment, avoidance grooves 410 are provided symmetrically at both ends of the first magnetic conducting member 41 , so that the first magnetic conducting member 41 can be easily routed even if the first magnetic conducting member 41 is installed in an exchanged position, which is more fault-tolerant and easier to install. As shown in Figures 11 and 12, the circuit board 5 is provided with a terminal post 5a protruding toward the side where the coil 40 is located, the terminal post 5a is a copper column, and one end of the terminal post 54 is connected and conducted with the lead wire drawn from the coil 40, and in addition One end is connected and conducted with the circuit of the circuit board 5 . The binding post 54 can be SMT on the circuit board 5, or can be welded on the circuit board 5, or riveted on the circuit board 5. Of course, the above three connection methods are not limited to one, and two of them can be implemented at the same time. or three.

Since the terminal 5a is closer to the coil 40, the connection between the coil 40 and the terminal 5a is more convenient; preferably, the terminal 5a extends to the outside of the outer peripheral surface of the first magnetic conductive member 41, so as to further facilitate the connection between the lead wire of the coil 40 and the terminal 5a. Welding work.

Referring to Fig. 13, the terminal post 5a is arranged on the end of the circuit board 5 away from the wiring hole 11, on the one hand, it can prevent the terminal post 5a from covering the wiring hole 11, and it is more convenient for the cables of the external circuit to pass through the wiring hole 11; On the one hand, the welding area between the circuit board 5 and the cables of the external circuit can be increased, so that the welding operation is more convenient and the welding quality is better.

As shown in Figures 15 to 18, the second bone conduction sound generating device 61 also includes a button assembly connected to the circuit board 5, so that the user can perform certain control functions by manipulating the button assembly, such as switching on and off and switching audio etc. Preferably, the button assembly includes a switch 55 arranged on the circuit board 5 and a pressing panel 57 connected to the outer surface of the base shell part 14, the pressing panel 57 can be driven to trigger the switch 55 to act, thereby turning on or off The circuit sends corresponding signals. The switch 55 is preferably a tact switch, a micro switch, etc. In this embodiment, the switch 55 is a tact switch. As shown in Figures 16 and 17, the pressing panel 57 includes a base 570 and a pressing part 571 connected to the base 570. The thickness of the pressing part 571 is smaller than the thickness of the base 570. When the base 570 is connected to the base shell part 14, the pressing part 571 One end is fixedly connected to the base part 570, and the other end is suspended in the air. There is a space 572 between it and the base shell part 570, so that when the pressing part 571 is pressed, the pressing part 571 can be easily deformed, so that the pressing part 571 can trigger the switch 55 to realize corresponding functions. The base part 570 and the base shell part 14 can be connected by glue or by a heat-melt column 576 , for example.

Obviously, the thinner the pressing part 571 is, the easier it is to deform, and the smaller the pressure required to drive its deformation is, but too thin thickness will also make the pressing part 571 easy to break. Preferably, the thickness of the pressing part 571 is 0.3 More than mm, more preferably, the thickness of the pressing portion 571 is more than 0.4mm, more preferably, the thickness of the pressing portion 571 is more than 0.6mm, so that the pressing portion 571 is easy to deform, not easy to break, and more reliable good.

The base shell part 14 is provided with an avoidance through hole 140 corresponding to the switch 55 so that the pressing panel 57 can contact the switch 55 , and the pressing part 571 is provided with a protrusion 573 corresponding to the switch 55 . In a preferred embodiment, when the button assembly is pressed, the projection 573 directly contacts and presses the switch 55; The pad 574 and the pressing piece 575 connected with the flexible pad 574, the pressing piece 575 is located between the flexible pad 574 and the switch 55, the projection 573 corresponds to the position of the pressing piece 575, when the pressing part 571 is pressed, the projection 573 drives the flexible The pad 574 is deformed so that the pressing piece 575 depresses the switch 55 . Since the flexible pad 574 seals the avoidance through hole 140, foreign matter from the outside will not enter the cavity 10, and its waterproof and dustproof effect is better, which is beneficial to the long-term and reliable operation of the bone conduction earphone. Preferably, the material of the flexible pad 574 is silica gel or rubber, which can be connected to the base shell 14 by pasting, etc., and the material of the pressing member 575 is plastic, which can be connected to the flexible pad 574 by bonding.

Since the pressing panel 57 is disposed outside the base shell portion 14, its area can be enlarged conveniently, so that human hands can easily touch and operate the pressing panel 57, improving the convenience of use. As a preferred implementation manner, the pressing panel 57 is consistent with the outer contour shape of the base shell part 14, so as to improve the overall aesthetics. More preferably, the pressing portion 571 accounts for more than 50% of the surface area of the pressing panel 57; more preferably, the pressing portion 571 accounts for more than 70% of the surface area of the pressing panel 57, and even more preferably, the pressing portion 571 accounts for 90% of the surface area of the pressing panel 57. %above.

In order to save more effort when operating the button structure, the base 570 is arranged on the side of the pressing part 571, so that the suspended length of the pressing part 571 can be made longer, and it can be driven to deform with less force, so that the pressing part 571 can be pressed. It saves effort.

As shown in Figure 12 and Figure 13, the first microphone 50 and the second microphone 51 are arranged on the circuit board 5 of the first bone conduction sound generating device 60, wherein the first microphone 50 is mainly used to receive the user's voice ( voice), and the second microphone 51 is mainly used to receive ambient sound (background noise) for active noise reduction. Compared with the second microphone 51, the first microphone 50 is arranged on the casing 1 closer to the user's mouth position to receive louder, clearer speech.

Further, as shown in FIG. 11 and FIG. 19 , a first microphone hole 12 corresponding to the first microphone 50 and a second microphone hole 12 corresponding to the second microphone 51 are opened on the shell 1 of the first bone conduction sound generating device 60 . Microphone hole 13, so that the external sound can be better transmitted to the microphone and captured by it.

As a preferred embodiment, the distance between the center of the first microphone hole 12 and the center of the second microphone hole 13 is not less than 15mm (the center of the microphone hole refers to the contour shape of the microphone hole at the outer surface of the housing 1 center) to reduce the correlation of the sounds received by the first microphone 12 and the second microphone 13, so that the directivity of the microphone array formed by the two microphones is stronger, and it is easier to perform noise reduction processing. Those on the call will hear higher quality voices with less background and wind noise and clearer voices.

As a preferred embodiment, as shown in Figure 19, the positive direction of the axes of the first microphone hole 12 and the second microphone hole 13 are not blocked by the auricle. In this article, the positive direction of the microphone hole refers to the For the direction from the inside of the cavity 10 to the outside, refer to the direction of the arrow in FIG. 19 . The shape of the auricle tends to cause the sound to converge here. Therefore, if the positive direction of the axis of the microphone hole is blocked by the auricle, it is easy to receive the concentrated sound at the auricle and cause the volume to be unbalanced, which will affect the bone conduction sound generating device. sound quality.

As a preferred embodiment, the angle between the positive direction of the axis of the first microphone hole 12 and the second microphone hole 13 is not less than 70°, so that the sound collected by the first microphone 50 and the second microphone 51 The correlation is low, and the noise reduction effect is improved. Further preferably, the angle between the positive direction of the axis of the first microphone hole 12 and the second microphone hole 13 is 90°. At this time, the first microphone 50 and the second microphone 51 The collected sound has the least correlation and the best noise reduction effect.

It can be understood that, in the present invention, the first microphone 50 and the second microphone 51 form a microphone array, and the microphone array can form a directivity when receiving sound, and the microphone array can be directed to the direction of the person's mouth through the above-mentioned reasonable design, so that when receiving sound, What is received is mainly the sound from the human mouth, while the environmental noise is filtered out due to the directivity of the microphone array without radio processing. The two microphones input different signals, and the background noise and wind noise are denoised by an algorithm. Finally, the person talking to the user can hear the clear voice after filtering out the environmental noise and wind noise, and finally achieves noise reduction during the call. The purpose of improving the sound quality and call quality of the bone conduction sound generating device and the bone conduction earphone having the bone conduction sound generating device.

Since the first bone conduction sound generating device 60 has a microphone hole, in order to make it have better waterproof performance, as shown in Figure 11 and Figure 20, it also includes a first waterproof and breathable membrane 52 and a second waterproof and breathable membrane sheet 53, the first waterproof and breathable membrane 52 and the second waterproof and breathable membrane 53 are all attached on the inner wall of the housing 1, wherein the first waterproof and breathable membrane 52 is used to seal the first microphone hole 12, and the second waterproof and breathable The diaphragm 53 is used to seal the second microphone hole 13 . Since the waterproof and breathable membrane has the characteristics of allowing gas to pass through and preventing liquid from passing through, it can prevent external liquid from entering the housing 1 through the microphone hole without affecting sound transmission, and can play a role in the internal parts of the housing 1. The protective function improves the service life and reliability of the bone conduction sound generating device.

It can be understood that since the bone conduction earphone of the present invention can collect sound and reduce noise through the first bone conduction sounding device 60, and control it through the second bone conduction sounding device 61, the functions are more comprehensive and the functions are set separately , so that the internal components of the left bone conduction sounding device 60 and the right bone conduction sounding device 61 can be reduced, so that the respective volumes are smaller.

When the bone conduction sounding device in the present invention is in use, its cover body 2 faces the user's head skin, and generally abuts against the skin near the temporal bone of the user's ear, in order to make it more comfortable to use, as shown in Figure 21 As shown, the cover body 2 also includes a flexible layer 24 on the outside thereof, and the flexible layer 24 can be made of flexible materials such as silicone, so as to make it more comfortable to touch. As a preferred embodiment, the thickness of the flexible layer 24 ranges from 0.2 to 1mm, especially the best thickness close to 0.4 to 0.5mm. If the flexible layer 24 is too thin, for example, its thickness is 0.2mm. The vibration of the part in contact with the flexible layer 24 will be very strong, which will affect the user experience; and if the flexible layer 24 is too thick, for example, its thickness is 1mm, the vibration energy absorbed by the flexible layer 24 is too much, and the vibration energy transmitted to the contact part of the human face Vibration is greatly reduced, and the sound quality heard by the user is reduced, and the sound volume is also reduced.

Referring to FIG. 22 and FIG. 23, FIG. 22 is a frequency response curve diagram obtained by simulation when the thickness of the flexible layer 24 of the bone conduction earphone in an embodiment is changed. FIG. 23 shows the height of multiple frequency response curves in FIG. The corresponding relationship between the frequency resonance peak and the thickness of the flexible layer. Usually, the frequency response curve has high-frequency resonance peaks and low-frequency resonance peaks. Generally, low frequency refers to sounds less than 500Hz, intermediate frequency refers to sounds in the range of 500Hz to 4000Hz, and high frequency refers to sounds greater than 4000Hz. The frequency difference between the low-frequency formant and the high-frequency formant is the bandwidth. When the low-frequency formant is fixed, the cut-off frequency of the high-frequency formant reflects the bandwidth. Generally speaking, the wider the bandwidth, the better the dynamic response, the larger the audible sound range, the richer the high-frequency details, the stronger the texture of some instruments in music, the more realistic the human voice, and the clearer the sound level. The more accurate the positioning, the better the sound quality you will hear. According to Fig. 22 and Fig. 23, the flexible layer 24 has the widest bandwidth when the thickness is 0.2 mm, but at this time, the vibration sense transmitted from the earphone to the contact position of the face is the strongest (the equivalent sensitivity exceeds 120 dB), which is unacceptable to human senses. The bandwidth of the flexible layer 24 is the narrowest when the thickness is 1 mm. At this time, the vibration sense transmitted from the earphone to the contact position on the face is the slightest (the equivalent sensitivity is lower than 115dB). When the thickness of the flexible layer 24 is 0.4 mm to 0.5 mm, the bandwidth is moderate, the sound quality is good, and the vibration is also moderate. Therefore, this thickness is the best choice for the thickness of the flexible layer 24 in bone conduction earphone design.

As shown in FIG. 21 , the cover 2 has a contact surface 25 for contacting the skin 7 of the user's head. When the cover 2 is provided with a flexible layer 24 , the contact surface 25 is the surface of the flexible layer 24 . The contact surface 25 has a normal A, and the magnetic circuit assembly 3 has a vibration axis B along which it reciprocates when it vibrates. As a preferred embodiment, the vibration axis B is perpendicular to the contact surface 25. At this time, the angle between the vibration axis B and the normal A is 0°, the magnetic circuit assembly 3 exerts the largest vibration force on the human body, and its volume It is also the largest, and the human body feels the strongest low-frequency vibration at this time. As another preferred embodiment, the vibration axis B is set obliquely to the normal line A, and the angle between them is any value between 0° and 35° excluding 0°. It can be understood that the greater the angle When the vibration force is large, the component force parallel to the skin 7 generated by the vibration force is larger, and the component force perpendicular to the skin 7 is smaller. At this time, the vibration feeling is weakened, and the volume felt by the human body is smaller; and the smaller the included angle, the situation is just the opposite. . Therefore, it is further preferred that the included angle is set to any value between 0° and 10° that does not include 0°. At this time, it has a larger volume, and can reduce a certain low-frequency vibration, and can obtain the better of the two. The balance is more comfortable to use.

The implementation of the included angle is not limited. For example, the cover body 2 can be set in a shape with one end thicker and the other end thinner, so that an included angle greater than 0° is formed between its normal line A and the vibration axis B.

As a preferred embodiment, the Young's modulus of the shell 1 and the cover 2 (not including the flexible layer 24) of the bone conduction sound generating device is ≥ 2GPa, for example, it can be 2GPa, 4GPa, 8GPa, 12GPa, 20GPa, 25GPa, 35GPa or 76GPa, it can be understood that the Young's modulus of the housing 1 and the cover 2 may be the same or different.

Further preferably, the Young's modulus of the shell 1 and the cover 2 is any value between 8GPa and 25GPa. Referring to FIG. 24, FIG. 24 shows that the shell 1 and the cover 2 are made of materials with different Young's moduli. In the case of , the corresponding frequency response curve of the bone conduction earphone obtained by simulation can be seen from Figure 24 that the material of the shell part (shell 1 and cover 2 (except the soft layer part)) of the bone conduction sound generating device is between 8GPa and The sound quality is the best when it is 25GPa, because the bandwidth is too narrow when it is lower than 8GPa, the sound quality is degraded, the sound is not transparent enough and feels dry, and it loses a lot of sound details, the texture of the instrument is not good, the human voice is hollow, and the voice is lacking Friction, the sound is too fake, and the sound quality is obviously deteriorated. Materials higher than 25GPa tend to use denser materials such as high-density plastics or metal materials. Although the bandwidth is sufficient at this time, the use of high-density materials will This will increase the overall weight of the bone conduction headset, which will also affect the wearing experience of the end user. Therefore, the shell part (shell 1 and cover 2 (except the soft layer part)) of the bone conduction sound generating device is selected to be made of a material with a Young's modulus of 8GPa to 25GPa. The best combination of wideband, low-frequency and mid-high frequency sensitivity, and headphone quality.

As shown in Fig. 25, Fig. 25 shows a frequency response curve of a bone conduction earphone provided by the present invention, wherein the horizontal axis is the vibration frequency, and the vertical axis is the vibration intensity of the bone conduction earphone. The vibration intensity mentioned here can be expressed as the vibration acceleration of the bone conduction earphone. Generally, in the frequency response range from 1000 Hz to 10000 Hz, the flatter the frequency response curve, the better the sound quality of the bone conduction earphone. The structure of bone conduction earphones, the design of components, material properties, etc. may have an impact on the frequency response curve. Generally, low frequency refers to sounds less than 500Hz, intermediate frequency refers to sounds in the range of 500Hz to 4000Hz, and high frequency refers to sounds greater than 4000Hz. As shown in Figure 25, the frequency response curve of the bone conduction earphone has a resonant peak in both the low-frequency region and the high-frequency region, and the resonant peak in the low-frequency region can be generated by the joint action of the shrapnel 30 and the fixed vibration component of the earphone (namely, the magnetic circuit component 3). ; while the resonant peak in the high-frequency region can be generated under the drive of the vibration component and the resonance of the entire earphone system.

Obviously, the bone conduction earphone of the present invention makes the resonant peak appear in the low frequency region by setting the shrapnel 30, so that the frequency response curve in the frequency response range of 1000 Hz to 10000 Hz is flatter, and the sound quality of the bone conduction earphone is effectively improved. In addition, There is only one formant in the low frequency area, and the sound quality of the low frequency is better.

In order to further make the frequency response curve in the frequency response range of 1000Hz-10000Hz more flat, the Young's modulus of the casing 1 and the cover 2 can be adjusted. Generally, under the condition of constant size, the greater the Young's modulus of the material of the shell 1 and the cover 2, the greater the stiffness. The frequency response curve of the bone conduction earphone has a crest in the high frequency region towards the high frequency The direction change is beneficial to adjust the peak of the high-frequency region to a higher frequency, so as to obtain a flatter frequency response curve in the frequency response range of 1000Hz to 10000Hz, and improve the sound quality of bone conduction headphones. Further, by adjusting the Young's modulus of the housing 1 and the cover 2, the peak of the high-frequency region can be adjusted beyond the hearing range of the human ear.

Referring to Fig. 1, the neck wearing assembly 7 is connected between the first bone conduction sounding device 60 and the second bone conduction sounding device 61, which includes a battery compartment 70, a control compartment 71, and a battery compartment connected between the battery compartment 70 and the control compartment 71. The neckband 72 , the first earhook 73 connected between the battery compartment 70 and the first bone conduction sounding device 60 , and the second earhook 74 connected between the control compartment 71 and the second bone conduction sounding device 61 .

The first earhook 73 and the second earhook 74 are arc-shaped, and their shapes can be adjustable or fixed. When wearing bone conduction earphones, they are respectively hooked above the left and right ears, and the neck-wearing wire 72 is wrapped around the human body. behind the head to prevent bone conduction earphones from falling.

As shown in FIG. 26 , the battery compartment 70 includes a battery box 700 , a battery box cover 701 , and a power supply 702 and a circuit board 703 that are both disposed in the battery box 700 . The battery box 700 has a space for accommodating the power supply 702 and the circuit board 703, the power supply 702 and the circuit board 703 are fixedly installed in the battery box 700, and the two are electrically connected, and the battery box 700 is provided with a first interface 704 communicating with its interior and the second interface 705, so as to pass through the cable and connect with the external circuit. The battery box cover 701 is connected to the battery box 700 for sealing the battery box 700 to protect the internal power supply 702 and circuit board 703 and other components. The power supply 702 is used to supply power to the two bone conduction sound generating devices and the main control board 712 in the control compartment 71 , and the power supply 702 may be, for example, a lithium battery.

As shown in Figure 27, the control compartment 71 includes a control box 710, a control box cover 711, and a main control board 712 and a light guide column 713 that are all arranged in the control box 710. The control box 710 has a storage space for accommodating components such as the main control board 712. Meanwhile, a third interface 717 and a fourth interface 718 communicating with the inside of the control box 710 are provided to pass cables and connect with external circuits. The main control board 712 is electrically connected to the bone conduction sound generating device, and is used for data processing and issuing control commands, such as controlling the volume of the bone conduction sound generating device, controlling the vibration of the bone conduction sound generating device, and connecting with terminals such as smart phones through Bluetooth. As a preferred embodiment, a tact switch can be set on the main control board 712, and buttons 716 are arranged on the surface of the control box 710 or the surface of the control box cover 711, and the relevant functions of the bone conduction sound generating device can be controlled through the buttons 716, for example To control the volume of the bone conduction sound generating device, long press and short press can also be configured to have different control effects, such as long press to realize the switch function, and short press to realize the volume adjustment function. One end of the light guide column 713 corresponds to the light-emitting element (such as an LED lamp bead) arranged on the main control board 712, and the other end extends to the control box 710 or the control box cover 711, and its light can be observed by personnel outside the control compartment 71. Therefore, the part of the control box 710 or the control box cover 711 corresponding to the light guide column 713 can be set to be transparent, or the light guide column 713 can also be extended to the outside of the control compartment 71 . By observing the color emitted by the light guide bar 713 and/or the flickering frequency, etc., various information can be displayed, such as information such as charging, normal operation, or insufficient power.

An electrode set 714 electrically connected to the main control board 712 is arranged inside the control compartment 71 . The electrode set 714 includes two charging electrodes protruding outside the control compartment 71 for charging the power supply 702 . As a preferred embodiment, the bone conduction earphone adopts magnetic charging, and can absorb the charging head during magnetic charging.

The neck wear line 72 is preferably made of a flexible material such as silica gel, etc. wrapped with a titanium intermediate support structure, which can deform according to the shape of the head and maintain a certain clamping force for the wearing part, making it easier to wear. Both ends of the neckband 72 are respectively connected to the first interface 704 of the battery box 700 and the third interface 717 of the control box 710, and the connection method is not limited, such as bonding, ultrasonic welding or snap connection. In order to realize the electrical connection between the circuit board 703 and the main control board 712, referring to FIG. The main control board 712 is connected. In a preferred embodiment, the connection between the first cable 720 and the circuit board 703 and between the first cable 720 and the main control board 712 is directly connected, that is, the two ends of the first cable 720 are directly connected to each other. Through the first interface 704 and the third interface 717, it is connected with the circuit board 703 and the main control board 712 by means of welding (not necessarily directly welded on the circuit board 703 and the main control board 712, but also with the slave circuit board 703 and the main control board 712) The wires drawn out on the control board 712 are welded); in another preferred embodiment, between the first cable 720 and the circuit board 703, and between the first cable 720 and the main control board 712, plug-in Connected in the same way, that is, a first connector is arranged in the first interface 704 and the third interface 717, the first connector in the first interface 704 is electrically connected with the circuit board 703, and the first connector in the third interface 717 It is electrically connected to the main control board 712, and a second connector electrically connected to the internal first cable 720 is provided at both ends of the neckband 72. One of the first connector and the second connector is provided with pins, and the other One is provided with pin holes corresponding to the pins, so that the electrical connection is realized through the plug-in fit of the first connector and the second connector.

The housing 1 of the bone conduction sound generating device is provided with a connecting pipe 1a (see FIG. 4 for the reference number) extending outward, and the connecting pipe 1a corresponds to the position of the wiring hole 11 . The two ends of the first earhook 73 are respectively connected to the connecting pipe 1a of the first bone conduction sounding device 60 and the second interface 705 of the battery compartment 70, while the two ends of the second earhook 74 are respectively connected to the connecting tube 1a of the second bone conduction sounding device 61. The connection pipe 1a is connected to the fourth interface 718 of the control chamber 71, and the connection method is not limited, for example, it may be adhesive, ultrasonic welding or snap connection.

In order to realize the connection between the circuit board 5 and the power supply 702 in the first bone conduction sounding device 60, as shown in FIG. The other end is electrically connected to the circuit board 703. The specific connection method can be the above-mentioned direct connection method or plug-in connection method. In the direct connection method, the second cable 730 can be directly connected to the circuit board 703. The board 5 and the circuit board 703 may also be connected with the wires drawn from the circuit board 5 and the circuit board 703 .

Similarly, in order to realize the connection between the circuit board 5 in the second bone conduction sounding device 61 and the main control board 712, as shown in FIG. One end is electrically connected to the circuit board 5, and the other end is electrically connected to the main control board 712. The specific connection method can also refer to the above-mentioned direct connection method and plug-in connection method. In the direct connection method, the third line The cable 740 can be directly connected to the circuit board 5 and the main control board 712 , and can also be connected to a wire drawn from the circuit board 5 and the main control board 712 .

The present invention also provides an assembly method of the bone conduction earphone, which includes the following steps: assembling the bone conduction sound generating device and the ear hook, and assembling the neck wearing component.

Specifically, the step of assembling the bone conduction sounding device and the earhook includes the following steps:

S1. Install the circuit board 5 in the casing 1;

S2. Install the ear hooks on the housing 1 and electrically connect with the circuit board 5;

S3. Install the voice coil assembly 4 in the housing 1, and electrically connect the coil 40 of the voice coil assembly 4 to the circuit board 5;

S4. Install the magnetic circuit assembly 3 on the cover body 2 , and install the cover body 2 with the magnetic circuit assembly 3 on the housing 1 .

Through the above steps S1 to S4, the first bone conduction sound generating device 60 connected with the first earhook 73 and the second bone conduction sound generating device 61 connected with the second earhook 74 are obtained.

The step of assembling the neck wearing assembly includes the following steps:

S5. Connect the battery box 700 and the control box 710 to both ends of the neckband 72 respectively;

S6. Connect the first ear hook 73 to the battery box 700, and connect the second ear hook 74 to the control box 710;

S7. Assemble the battery box 700 and the control box 710 into the battery box 70 and the control box 71 respectively.

In step S1, the step of installing the circuit board 5 in the housing 1 includes the following steps: S10. Install the circuit board 5 to the bottom of the housing 1 (specifically on the base housing part 14) along the third positioning column 16; S11. The circuit board 5 is fixed in the casing 1 by heat-melting the third positioning post 16 with a heat-melting device.

In step S2, the earhook needs to be connected to the housing 1 of the corresponding bone conduction sounding device, for example, the first earhook 73 needs to be connected to the housing 1 of the first bone conduction sounding device 60, and the second earhook 74 It needs to be connected to the casing 1 of the second bone conduction sound generating device 61 . When connecting the first earhook 73 to the housing 1 of the first bone conduction sounding device 60, the second cable 730 of the first earhook 73 and the circuit board 5 can be electrically connected by soldering or the like. connected, or electrically connected by plugging, and then glued and packaged between the first earhook 73 and the interface position of the first bone conduction sound generating device 60, so as to improve the sealing and the firmness of the connection. Similarly, in step S2, when the second earhook 74 is connected to the second bone conduction sounding device 61, the third cable 740 of the second earhook 74 can be directly connected to the circuit board 5 by welding or the like. electrical connection, or electrical connection through a plug-in connection, and then seal between the second earhook 74 and the interface position of the second bone conduction sounding device 61 .

In step S3, the step of installing the voice coil assembly 4 in the housing 1 includes the following steps: S30. Install the first magnetic guide 41 on the housing 1 along the fourth positioning post 173 (specifically, the on the supporting boss 17); step S31. heat-melt the fourth positioning column 173 by the hot-melt equipment, and fix the first magnetic-conducting member 41 on the supporting boss 17.

In step S4, the step of installing the magnetic circuit assembly 3 on the cover body 2 includes the following steps: S40. Attach double-sided adhesive on the connection surface 20 of the cover body 2 or on the outer ring body 301 of the shrapnel 30; S41. The elastic sheet 30 is attached to the connection surface 20 .

In step S4, the step of installing the cover body 2 with the magnetic circuit assembly 3 on the housing 1 includes the following steps: S42. Applying Glue, apply glue in the support seat 152; S43. Insert the annular boss 22 into the annular groove 150, and insert the outer ring body 301 of the shrapnel 30 into the limit groove 1520 of the support seat 152, so that the cover body 2 and the housing 1 adhesion, and at the same time, the shrapnel 30 is adhered to the support seat 152.

For the first bone conduction sound generating device 60, since it includes the first microphone 50 and the second microphone 51, it also includes the following steps before installing the circuit board 5 in step S1: the first waterproof and breathable membrane 52 and The second waterproof and gas-permeable membrane 53 is correspondingly attached to the position corresponding to the first microphone hole 12 and the second microphone hole 13 in the housing 1 . In addition, it is easy to understand that when installing the circuit board 5 in step S1, the first microphone 50 and the second microphone 51 need to be aligned with the first microphone hole 12 and the second microphone hole 13 respectively; It is connected to the terminal 5a of the circuit board 5 .

As for the second bone conduction sound generating device 61, since it includes a button assembly, it also includes the following steps before installing the circuit board 5 in step S1: installing the flexible pad 574 connected with the pressing member 575 to the base shell part 14 on the outer surface, and then the pressing panel 57 is connected to the outer surface of the base shell part 14.

In step S5, when the battery box 700 and the control box 710 are respectively connected to the two ends of the neck-worn wire 72, the first cable 720 of the neck-worn wire 72 is led out into the battery box 700 and the control box 710, or the neck The wearing wire 72 is plugged with the battery box 700 and the control box 710, and then glued and packaged at the interface position of the neck wearing wire 72, the battery box 700 and the control box 710.

In step S6, when connecting the first earhook 73 to the battery box 700, the second cable 730 can be led out into the battery box 700 first, or the first earhook 73 and the battery box 700 can be plugged in, and then The interface position of the first earhook 73 and the battery box 700 is glued and sealed; similarly, when the second earhook 74 is connected to the control box 710, the third cable 740 can be led out into the control box 710 first, or The second ear hook 74 is plugged into the control box 710 , and then the interface between the second ear hook 74 and the control box 710 is sealed with glue.

In step S7, when assembling the battery compartment 70, the components inside the battery compartment 70, such as the power supply 702 and the circuit board 703, are installed in the battery compartment 700, and then the battery compartment cover 701 is covered, and the battery compartment 700 and the Glue is applied between the interface positions of the battery case cover 701 for encapsulation. Similarly, when assembling the control compartment 71, the components inside the control compartment 71, such as the main control board 712, the light guide column 713 and the electrode group 714, are installed in the control box 710, and then the control box cover 711 is covered, and Glue sealing between the control box 710 and the interface position of the control box cover 711 .

Obviously, for the situation where the cables are led out to the battery box 700 and the control box 710, when installing the circuit board 703 and the main control board 712, it is necessary to electrically connect the circuit board 703 and the main control board 712 to the corresponding cables; and For the case of connecting by plugging, when installing the circuit board 703 and the main control board 712 , they need to be electrically connected to their respective connectors through signal wires and/or wires.

It can be understood that in the assembly method of the bone conduction earphone, the battery compartment 70 and the control compartment 71 are assembled last, which is more convenient for wiring in the battery compartment 70 and the control compartment 71, and can be tested after the electrical connection is completed. After passing the test, the battery compartment 70 and the control compartment 71 are sealed to prevent repeated opening of the battery compartment 70 and the control compartment 71. The assembly is more convenient and the sequence is more reasonable.

The present invention at least possesses the following advantages:

1. In the present invention, the magnetic circuit assembly is set to be connected to the cover body, and the voice coil assembly is set to be connected to the casing, so when assembling, the circuit board can be installed in the casing first, and then the earhook and the voice coil assembly can be installed , and connect the lead wire of the coil to the circuit board; finally, install the cover connected with the magnetic circuit assembly on the housing to realize the installation of the bone conduction sounding device and its connection with the earhook, and its overall structure is simpler and more compact , the assembly is more convenient; further, the bone conduction earphone of the present invention is provided with a neckband, a first earhook and a second earhook, which is more convenient to wear and has a smaller and more compact structure.

2. In the present invention, the connecting arm of the shrapnel is suspended in the air and does not contact the second magnetically conductive part and the cover plate, so that its vibration is not disturbed, the amplitude is larger, and the sound quality, especially the low-frequency sound quality, is better.

3. By setting the first microphone for receiving the voice of the user and the second microphone for receiving the ambient sound, noise can be effectively reduced according to the ambient sound, and the sound quality and user experience of the earphone can be improved; There is a waterproof and breathable diaphragm that seals the first microphone hole and the second microphone hole, which is beneficial to prevent liquid from entering the shell and damaging the internal electrical components, and improves the service life and reliability of the bone conduction sound generating device.

The above is only a specific embodiment of the present invention, and any other improvements made on the premise of the concept of the present invention are regarded as the protection scope of the present invention.

Claims (33)

1. A bone conduction earphone, characterized in that it comprises:

   A first bone conduction sounding device (60);

   The second bone conduction sounding device (61);

   a control compartment (71), including a main control board (712) for controlling the first bone conduction sound generating device (60) and the second bone conduction sound generating device (61); and

   A battery compartment (70), including a power supply (702) for supplying power to the first bone conduction sound generating device (60), the second bone conduction sound generating device (61) and the main control board (712);

   Wherein, the first bone conduction sounding device (60) and the second bone conduction sounding device (61) both include:

   The housing (1) includes a cavity (10) and a wiring hole (11) communicating with the cavity (10), and one end of the cavity (10) is open;

   a cover (2), connected to the housing (1), and sealing the opening;

   a magnetic circuit assembly (3), connected to the cover (2), and located in the cavity (10);

   A voice coil assembly (4), arranged in the cavity (10), the voice coil assembly (4) is arranged opposite to the magnetic circuit assembly (3), and is used to drive the magnetic circuit assembly (3) to vibrate ;as well as

   A circuit board (5), which is arranged in the cavity (10), is electrically connected to the voice coil assembly (4), and is routed to the main control board (712) through the wiring hole (11). ) and the power supply (702) are electrically connected.
2. The bone conduction earphone according to claim 1, further comprising:

   A neckband (72), connected between the control compartment (71) and the battery compartment (70);

   A first ear hook (73), connected between the battery compartment (70) and the first bone conduction sounding device (60); and

   The second ear hook (74) is connected between the control compartment (71) and the second bone conduction sound generating device (61).
3. The bone conduction earphone according to claim 2, characterized in that, the battery compartment (70) further comprises a battery box (700), a circuit board (703) electrically connected to the power supply (702) and sealing the The battery case cover (701) of the battery case (700), the power supply (702) and the circuit board (703) are all arranged in the battery case (700).
4. The bone conduction earphone according to claim 3, characterized in that, the neck-worn wire (72) comprises a first cable electrically connected between the circuit board (703) and the main control board (712) (720);

   The first earhook (73) includes a second cable (730), and the second cable (730) is electrically connected to the circuit board (5) of the first bone conduction sounding device (60) and the Between circuit boards (703);

   The second ear hook (74) includes a third cable (740) electrically connected between the circuit board (5) of the second bone conduction sound generating device (61) and the main control board (712).
5. The bone conduction earphone according to claim 1, wherein the main control board (712) is provided with a tact switch, and the control compartment (71) is provided with a button (716) corresponding to the tact switch .
6. The bone conduction earphone according to claim 1, characterized in that, the control compartment (71) comprises a control box (710), a control box cover (711) sealing the control box (710), and a control box cover (711) arranged on the The light-emitting element on the main control board (712), the main control board (712) is arranged in the control box (710), and the light of the light-emitting element can be observed from the outside of the control box (71).
7. The bone conduction earphone according to claim 1, characterized in that, the voice coil assembly (4) comprises a coil (40), a first magnetic conductor (41) and a first magnetic member (42), and the coil ( 40) and the first magnetic part (42) are both connected to the side of the first magnetic conducting part (41) close to the magnetic circuit assembly (3);

   The magnetic circuit assembly (3) includes an elastic piece (30) connected to the cover (2), a second magnetic conductor (31) connected to the elastic piece (30), and a second magnetic conductor connected to the second magnetic conductor. The part (31) is close to the second magnetic part (32) on the side of the voice coil assembly (4);

   After the coil (40) is energized, an electromagnetic field with changing polarity is generated, and the electromagnetic field produces changing attractive and repulsive forces to the second magnetic part (32), and the second magnetic part (32) Under the action of force and the repulsive force, the shrapnel (30) is driven to reciprocate and vibrate.
8. The bone conduction earphone according to claim 7, characterized in that, the first magnetic part (42) and the second magnetic part (32) are arranged opposite to each other, and the first magnetic part (42) and the There is a first attraction between the second magnetic member (31), and there is a second attraction between the second magnetic member (32) and the first magnetic member (41); in the coil (40) When no power is supplied, the resultant force of the first attraction force and the second attraction force is equal to the repulsion force between the first magnetic part (42) and the second magnetic part (32).
9. The bone conduction earphone according to claim 7, characterized in that, the elastic piece (30) comprises a body (300), an outer ring body (301) surrounding the outside of the body (300) and connected to the body ( 300) and several connecting arms (302) between the outer ring body (301), the outer ring body (301) is connected to the cover body (2), the body (300) is connected to the second The magnetic guide (31) is connected.
10. The bone conduction earphone according to claim 9, characterized in that, the connecting arm (302) is suspended and not in contact with the second magnetically conductive member (31).
11. The bone conduction earphone according to claim 10, characterized in that, the magnetic circuit assembly (3) further comprises a low-frequency adjustment plate connected between the body (300) and the second magnetically conductive member (31) (312), the low-frequency adjusting plate (312) is not in contact with the connecting arm (302).
12. The bone conduction earphone according to claim 10, characterized in that, the cover (2) is provided with an avoidance hole (23) for avoiding movement of the main body (300) and the connecting arm (302).
13. The bone conduction earphone according to claim 9, characterized in that, the housing (1) comprises a base shell part (14) opposite to the cover (2) and a base shell part (14) A connected side shell part (15), the cover (2) is connected with the side shell part (15).
14. The bone conduction earphone according to claim 13, characterized in that, the housing (1) further comprises a support seat (152) connected to the side shell part (15), and the support seat (152) has a limited opening. The positioning groove (1520), the outer ring body (301) is at least partially fitted in the limiting groove (1520).
15. The bone conduction earphone according to claim 14, characterized in that, the housing (1) further comprises ) between ribs (153);

    The number of the reinforcing rib (153) is one; or.

    The number of the reinforcing ribs (153) is multiple, and the multiple reinforcing ribs (153) are arranged at intervals.
16. The bone conduction earphone according to claim 13, characterized in that, the housing (1) further comprises a support boss (17) located in the cavity (10), and the first magnetically conductive member (41 ) is installed on the support boss (17), and an installation space for accommodating the circuit board (5) is formed between the base shell part (14).
17. The bone conduction earphone according to claim 1, characterized in that, the contact surface (25) of the cover (2) in contact with the user's body has a normal line A, and the vibration axis B of the magnetic circuit assembly (3) The included angle with the normal A is any value between 0° and 35°.
18. The bone conduction earphone according to claim 17, wherein the included angle is any value between 0° and 10°.
19. The bone conduction earphone according to claim 1, characterized in that the cover (2) includes a flexible layer (24) for contacting with the user's skin, and the thickness of the flexible layer (24) is 0.2-1mm .
20. The bone conduction earphone according to claim 19, characterized in that the thickness of the flexible layer (24) is 0.4-0.5 mm.
21. The bone conduction earphone according to claim 1, characterized in that, the Young's modulus of the shell (1) and the cover (2) is ≥ 2GPa.
22. The bone conduction earphone according to claim 21, characterized in that, the Young's modulus of the shell (1) and the cover (2) is any value between 8GPa and 25GPa.
23. The bone conduction earphone according to any one of claims 1 to 22, wherein the circuit board (5) of the first bone conduction sound generating device (60) includes a first microphone ( 50) and a second microphone (51) for receiving ambient sound; the housing (1) is provided with a first microphone hole (12) corresponding to the first microphone (50) and a first microphone hole (12) corresponding to the second microphone (51) corresponds to the second microphone hole (13).
24. The bone conduction earphone according to claim 23, characterized in that, the distance between the centers of the first microphone hole (12) and the second microphone hole (13) is not less than 15mm.
25. The bone conduction earphone according to claim 24, characterized in that, the angle between the positive directions of the axes of the first microphone hole (12) and the second microphone hole (13) is not less than 70°.
26. The bone conduction earphone according to claim 25, characterized in that, the angle between the positive directions of the axes of the first microphone hole (12) and the second microphone hole (13) is 90°.
27. The bone conduction earphone according to claim 23, characterized in that neither the positive direction of the axis of the first microphone hole (12) nor the axis of the second microphone hole (13) is blocked by the auricle.
28. The bone conduction earphone according to claim 23, characterized in that it also comprises a first waterproof and breathable membrane (52) and a second waterproof and breathable membrane (53), the first waterproof and breathable membrane (52) seals The first microphone hole (12) is sealed, and the second waterproof and breathable membrane (53) is sealed to the second microphone hole (13).
29. The bone conduction earphone according to any one of claims 1 to 22, characterized in that, the second bone conduction sound generating device (61) includes a button assembly, and the button assembly includes a A switch (55) and a pressing panel (571) connected to the outer surface of the housing (1) for pressing to trigger the switch (55).
30. The bone conduction earphone according to claim 29, wherein the button assembly comprises a base (570) connected to the housing (1) and a pressing portion (571) connected to the base (570), One end of the pressing part (571) is connected to the base part (570), and the other end is suspended. The housing (1) is provided with an avoidance through hole (140) corresponding to the position of the switch (55).
31. The bone conduction earphone according to claim 30, characterized in that, the button assembly further comprises a flexible pad (574) sealing the avoidance through hole (140) and a pad (574) between the flexible pad (574) and the switch Pressing piece (575) between (55).
32. An assembly method of a bone conduction earphone, used for assembling the bone conduction earphone according to any one of claims 2 to 31, characterized in that the assembly method of the bone conduction earphone comprises the steps of: assembling a bone conduction sounding device and an earphone Hanging, the steps of assembling the bone conduction sounding device and the earhook include the following steps:

    A circuit board (5) is installed in the housing (1);

    Install the ear hooks on the housing (1), and electrically connect with the circuit board (5);

    installing a voice coil assembly (4) in the housing (1), and electrically connecting the coil (40) of the voice coil assembly (4) to the circuit board (5);

    The magnetic circuit assembly (3) is installed on the cover body (2), and the cover body (2) with the magnetic circuit assembly (3) is installed on the casing (1).
33. The assembly method of bone conduction earphone according to claim 32, characterized in that, the first bone conduction sound generating device (60) connected with the first ear hook (73) is obtained through the step of assembling the bone conduction sound generating device and the ear hook ) and the second bone conduction sounding device (61) connected with the second earhook (74), the assembly method of the bone conduction earphone also includes the following steps:

    Connect the battery box (700) and the control box (710) to both ends of the neckband (72);

    connecting the first ear hook (73) to the battery box (700), and connecting the second ear hook (74) to the control box (710);

    The battery box (700) and the control box (710) are assembled into a battery box (70) and a control box (71) respectively.

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