CN216313412U

CN216313412U - Osteoacusis sound generating mechanism and osteoacusis earphone

Info

Publication number: CN216313412U
Application number: CN202122296504.0U
Authority: CN
Inventors: 陈娟; 曹洪斌; 赵玉洗
Original assignee: Suzhou Suoye Electronic Technology Co ltd
Current assignee: Suzhou Suoye Electronic Technology Co ltd
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2022-04-15
Anticipated expiration: 2031-09-18

Abstract

The utility model discloses a bone conduction sound production device and a bone conduction earphone, wherein the bone conduction sound production device comprises: a housing; the magnetic circuit assembly is arranged in the shell; the voice coil assembly is arranged in the shell and comprises a first magnetic conduction piece and a coil for driving the magnetic circuit assembly to vibrate, the coil is arranged on the surface, facing the magnetic circuit assembly, of the first magnetic conduction piece, and an annular cavity is formed between the periphery of the voice coil assembly and the side shell part; and the circuit board comprises a main board and a wiring part correspondingly arranged with the annular cavity, the distance between the wiring part and the coil is smaller than that between the main board and the coil, and the outgoing line of the coil is connected with the wiring part. In the utility model, the wiring of the circuit board and the coil is more convenient.

Description

Osteoacusis sound generating mechanism and osteoacusis earphone

Technical Field

The utility model relates to the technical field of speakers, in particular to a bone conduction sound production device and a bone conduction earphone.

Background

Bone conduction sound generating mechanism can turn into the mechanical oscillation of different frequencies with sound, when it contacts with people's skull, can make the people hear the sound through the mode of bone conduction, owing to need not to pass through media such as air and pass through the sound, consequently, can realize clear sound reduction in noisy environment, the sound wave can not influence other people because of diffusion in the air yet moreover, has wide application prospect.

Bone conduction sound generating mechanism includes the casing and all locates magnetic circuit component, voice coil loudspeaker voice coil subassembly and the circuit board in the casing, and magnetic circuit component includes magnet, and the voice coil loudspeaker voice coil subassembly then includes the coil, and the circuit board is connected with external circuit electricity, and it is used for driving the magnetic circuit component vibration for the coil power supply, through the change magnetic field that produces after the coil circular telegram.

In order to make the circuit board can be for the coil power supply, need to weld the lead-out wire of coil to the circuit board on, because casing inner space is narrow and small, consequently the circuit board is sheltered from by other subassemblies easily, leads to operating space little, and the lead-out wire and the circuit board welding of coil are difficult, in addition, and the same inconvenient problem of welding also exists in the wire of external circuit and the welding of circuit board.

Accordingly, there is a need for improvements in the art that overcome the deficiencies in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a bone conduction sound production device and a bone conduction earphone.

To achieve the above object, in one aspect, the present invention provides a bone conduction sound generating device, including:

a housing;

the magnetic circuit assembly is arranged in the shell;

the voice coil assembly is arranged in the shell and comprises a first magnetic conduction piece and a coil for driving the magnetic circuit assembly to vibrate, the coil is arranged on the surface, facing the magnetic circuit assembly, of the first magnetic conduction piece, and an annular cavity is formed between the periphery of the voice coil assembly and the side shell part; and

the circuit board comprises a main board and a wiring portion, wherein the wiring portion corresponds to the annular cavity, the distance between the wiring portion and the coils is smaller than the distance between the main board and the coils, and the outgoing lines of the coils are connected with the wiring portion.

Further, the wire connecting portion is located in the annular cavity and outside the outer peripheral surface of the coil.

Furthermore, the first magnetic conduction piece is provided with an avoiding groove for the outgoing line of the coil to pass through.

Further, the casing comprises a base casing part and a side casing part connected with the base casing part, the base casing part is provided with a supporting boss protruding into the casing, the main board is connected with the base casing part, and the first magnetic conduction part is connected with the supporting boss.

Further, the base housing portion is provided with a projection projecting toward the annular cavity, and the wiring portion is located on the projection.

Furthermore, the circuit board is a flexible circuit board, and further comprises an extension board connected with the main board, the extension board is connected with the bump, and the wiring portion is arranged on the extension board.

Furthermore, the circuit board is a hard circuit board and further comprises an adapter plate connected to the bump, and the wiring portion is arranged on the adapter plate.

Furthermore, the side shell part is provided with a wiring hole, the convex block is arranged on one side of the wiring hole or covers part of the wiring hole, and an external circuit passes through the wiring hole through a cable and is connected with the wiring part.

Further, the wire connection portion includes a solder post extending toward the annular cavity, and an outgoing line of the coil is soldered to the solder post.

In another aspect, the present invention further provides a bone conduction headset, including the bone conduction sound generating apparatus as described in any one of the above.

Compared with the prior art, the utility model has the following beneficial effects:

1. in the utility model, the wiring part is arranged corresponding to the annular cavity, and the wiring part is closer to the voice coil assembly than the circuit board, so that after the circuit board and the voice coil assembly are sequentially installed, the operation space for connecting the coil outgoing wire to the wiring part is larger, and meanwhile, the distance between the wiring part and the coil is closer, therefore, the outgoing wire of the coil can be more conveniently connected with the wiring part.

2. According to the utility model, the first magnetic conduction piece is provided with the avoiding groove, and the outgoing line of the coil can penetrate out of the avoiding groove, so that the outgoing line can be prevented from being bent in a transition manner, the outgoing line can be more conveniently wired and welded, and the service performance of a product is ensured.

Drawings

Fig. 1 is an exploded view of a bone conduction sound generator according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a bone conduction sound generator according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a housing according to an embodiment of the present invention.

Fig. 4 is a schematic view of the case shown in fig. 3 with a circuit board mounted therein.

FIG. 5 is a schematic view of a voice coil assembly according to one embodiment of the present invention.

Fig. 6 is a top view of the housing shown in fig. 3.

Fig. 7 is a schematic structural diagram of a spring plate according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a circuit board according to an embodiment of the present invention.

Fig. 9 is a schematic structural view of a housing in embodiment 1 of the present invention.

Fig. 10 is a schematic view of the case in which the circuit board is mounted in embodiment 1 of the present invention.

Fig. 11 is a schematic structural diagram of a circuit board in embodiment 1 of the present invention.

Fig. 12 is a schematic structural view of a housing in embodiment 2 of the present invention.

Fig. 13 is a schematic view of the case in which the circuit board is mounted in embodiment 2 of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "comprising" and "having," as well as any variations thereof, in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

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 application. The appearances of the 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 explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

As shown in fig. 1 to 13, the bone conduction sound generating apparatus according to a preferred embodiment of the present invention includes a housing 1, a cover 2, a magnetic circuit assembly 3, a voice coil assembly 4, and a circuit board 5.

As shown in fig. 2, the casing 1 includes a base casing 14 and an annular side casing 15 protruding outward from an outer edge of the base casing 14, a cavity 10 for accommodating the magnetic circuit assembly 3, the voice coil assembly 4 and the circuit board 5 is formed between the base casing 14 and the side casing 15, an opening is formed at an end of the cavity 10 away from the base casing 14, and the circuit board 5, the voice coil assembly 4 and the magnetic circuit assembly 3 are sequentially installed into the casing 1 through the openings when the magnetic circuit assembly is installed.

The cover 2 is connected to the side casing 15 of the housing 1 and located at the opening end of the cavity 10, and after the cover 2 is connected to the housing 1, the cover 2 seals the opening, and when the bone conduction sound-generating device is in use, the cover 2 contacts with human skin, so as to transmit sound through vibration.

The magnetic circuit assembly 3 and the voice coil assembly 4 are disposed opposite to each other in the cavity 10, wherein the magnetic circuit assembly 3 is connected between the cover 2 and the casing 1 through the elastic sheet 30, for example, the upper and lower surfaces of the elastic sheet 30 can be respectively connected to the cover 2 and the casing 1 by gluing, the voice coil assembly 4 is connected to the casing 1, and the magnetic circuit assembly 3 is closer to the base portion 14. Voice coil unit 4 is used for driving magnetic circuit unit 3 vibration, and it is connected with circuit board 5 electricity, is supplied power by circuit board 5, and circuit board 5 can control magnetic circuit unit 3 through the size and the direction isoparametric of the electric current of control input voice coil unit 4, can produce the vibration of different range, frequency, when lid 1 and human face contact, can make the people hear different sounds.

As shown in fig. 2 and 3, a support boss 17 protruding toward the opening end of the internal cavity 10 is provided on the base casing portion 14, the support boss 17 is used for mounting the voice coil assembly 4, a mounting space 100 for mounting the circuit board 5 is formed between the voice coil assembly 4 and the base casing portion 14, and the circuit board 5 is accommodated in the mounting space 100 and connected to the base casing portion 14. Therefore, the space in the shell 1 can be reasonably and fully utilized, the circuit board 5 and the voice coil assembly 4 are conveniently installed in the inner cavity 10, and the circuit board 5 is prevented from being pressed.

Obviously, since the voice coil assembly 4 is disposed between the magnetic circuit assembly 3 and the circuit board 5, and separates the magnetic circuit assembly 3 from the circuit board 5, the vibration of the magnetic circuit assembly 3 will not affect the circuit board 5, and the bone conduction sound generating device is more reliable in operation.

As shown in fig. 4, the circuit board 5 is disposed at the bottom of the cavity 10 (the bottom of the cavity 10 refers to an end thereof close to the base portion 14) and connected to the base portion 14. The side casing 15 of the casing 1 is further provided with a wire hole 11 communicated with the cavity 10, and the circuit board 5 can be electrically connected with an external circuit, for example, a power supply, a control board and the like, by routing through the wire hole 11, 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 a control signal. Because the control panel, the power supply and other components do not need to be arranged in the cavity 10, the size of the bone conduction sound production device can be greatly reduced, and the installation of internal components is facilitated.

The connection manner of the circuit board 5 and the base portion 14 is not limited, for example, the circuit board 5 may be adhered to the base portion 14 by gluing; for another example, the circuit board 5 may be fastened to the base portion 14 by screws; for another example, the circuit board 5 may be fixed to the base portion 14 by heat-fusing the heat-fusing posts. Of course, the three connection methods are not limited to one connection method, and two or three connection methods may be simultaneously implemented.

As shown in fig. 2, the voice coil assembly 4 includes a coil 40, a first magnetic member 41, and a first magnetic member 42. In this embodiment, the first magnetic conducting member 41 is plate-shaped, the first magnetic member 42 and the coil 40 are both connected to the first magnetic conducting member 41 and are both connected to one side of the first magnetic conducting member 41 close to the magnetic circuit assembly 3, and the connection manner between the first magnetic member 42, the coil 40 and the first magnetic conducting member 41 is not limited, and may be an adhesive connection, for example. The voice coil assembly 4 is connected to the support surface 170 of the support boss 17 through the first magnetic conductive member 41 thereof (see fig. 4 for reference).

The coil 40 is ring-shaped and has a central hole 400, and the first magnetic element 42 is disposed in the central hole 400 of the coil 40. The first magnetic conductive member 41 and the support boss 17 are not limited in connection manner, for example, they may be connected by gluing or by hot melting through a hot melting column.

In order to facilitate the leading-out of the leading-out wire of the coil 40, as shown in fig. 5, an avoiding groove 410 through which the leading-out wire passes is formed on the first magnetic conductive member 41, and the avoiding groove 410 is communicated with the outer circumferential surface of the first magnetic conductive member 41, so that the leading-out wire is disposed in the avoiding groove 410, and thus, bending is not required, and wiring is more convenient. As a preferred embodiment, avoidance slots 410 are symmetrically formed at two ends of the first magnetic conductive member 41, so that the first magnetic conductive member 41 can be conveniently wired even if the positions of the two ends are changed, and the fault tolerance is stronger and the installation is more convenient.

It should be noted that the supporting boss 17 may be in a closed ring shape or an interrupted ring shape, as shown in fig. 6, preferably, the supporting boss 17 is in an interrupted ring shape, and is provided with a plurality of notches 172, so as to eliminate the internal stress of the supporting boss 17 during the molding process, so that the accuracy of the supporting boss is higher, and at the same time, the arrangement of the circuit board 5 is facilitated, for example, the circuit board 5 may be partially located in the notches 172, so as to be close to the wire feeding hole 11 as much as possible, so as to facilitate the wiring.

As shown in fig. 2, the magnetic circuit assembly 3 includes a spring plate 30 connected between the cover 2 and the casing 1, a second magnetic conducting member 31 connected to the spring plate 30, and a second magnetic member 32 connected to the second magnetic conducting member 31 near the voice coil assembly 4, and the spring plate 30 and the second magnetic conducting member 31, and the second magnetic member 32 and the second magnetic conducting member 31 may also be connected by gluing. Because the elastic sheet 30 has elasticity, it can elastically deform after being stressed, so that the magnetic circuit assembly 3 can vibrate.

The first magnetic member 42 and the second magnetic member 32 are magnets, such as neodymium iron boron magnets, which can attract ferromagnetic substances, while the first magnetic member 41 and the second magnetic member 31 have no magnetism but can be attracted by magnets, and the first magnetic member 41 and the second magnetic member 31 can be ferromagnetic metals such as iron, nickel, cobalt, and the like, for example. The first magnetic member 42 and the second magnetic member 32 are arranged opposite to each other in the same polarity, that is, the two magnetic poles of the first magnetic member 42 and the second magnetic member 32 close to each other have the same polarity, so that the first magnetic member 42 and the second magnetic member 32 have a repulsive force repelling each other. Since the first magnetic conductive member 41 and the second magnetic conductive member 31 can be attracted by magnets, a first attractive force is generated between the first magnetic member 42 and the second magnetic conductive member 31, and a second attractive force is generated between the second magnetic member 32 and the first magnetic conductive member 41. Preferably, the resultant force of the first attraction force and the second attraction force is equal to the repulsion force, so that the elastic sheet 30 is in a stress balance state, no internal stress is generated, the vibration can be performed in a better response to the change of the magnetic force caused by the change of the magnetic field, and a better fidelity effect is achieved.

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

As shown in fig. 7, the elastic sheet 30 is a sheet shape, and includes a main body 300, an outer ring body 301 surrounding the main body 300, and a plurality of connecting arms 302 (in this embodiment, the number of the connecting arms 302 is 4) connected between the main body 300 and the outer ring body 301, wherein the outer ring body 301 is fixedly connected to the cover 2 and the casing 1 by gluing, for example, and the main body 300 is connected to the second magnetic conductive member 31. When the magnetic circuit assembly 3 vibrates, the outer ring body 301 is fixed between the lid 2 and the case 1, and displacement of the main body 300, the second magnetic material 31, and the second magnetic material 32 during vibration is achieved by elastic deformation of the connecting arm 302.

Because the voice coil assembly 4 is mounted on the supporting boss 17, a certain space is formed between the voice coil assembly 4 and the circuit board 5, the circuit board 5 comprises a wiring portion for connecting with the leading-out wire of the coil 40, in order to facilitate wiring, an annular cavity 12 is formed between the outer periphery of the voice coil assembly 4 and the side shell portion 15, the wiring portion is arranged corresponding to the annular cavity 12, so that the wiring portion is not blocked by the voice coil assembly 4, a larger operation space is provided, and the leading-out wire of the coil 40 can be conveniently connected with the wiring portion. The wiring portion may be, for example, a pad or a solder post. Further, the wiring portion is located closer to the coil 40 than the main board 50 of the circuit board 5, and further, the wiring portion is located inside the annular cavity 12 outside the outer peripheral surface of the coil 40 so as to be closer to the coil 40 for easier wiring.

In the first embodiment, as shown in fig. 9 to 11, a projection 18 projecting toward the side where the voice coil assembly 4 is located is provided on the base portion 14, and the projection 18 is provided in correspondence with the annular cavity 12, i.e., an upper surface thereof (a surface facing away from the base portion 14) is provided toward the annular cavity 12.

In the present embodiment, the circuit board 5 is a flexible circuit board, and referring to fig. 11, it includes a main board 50 connected to the base portion 14 and an extension board 51 connected to the bump 18, the extension board 51 is provided with the wiring portion, obviously, since the circuit board 5 is a flexible circuit board, the extension board 51 can be conveniently bent and extended onto the bump 18, and is supported by the boss 18, so that the distance between the wiring portion and the coil 40 is closer, and the lead-out wire of the coil 40 is conveniently soldered to the wiring portion. The extension plate 51 and the projection 18 may be connected by gluing.

Preferably, the tab 18 projects into the annular cavity 12 so that the extension plate 51 thereon can also be located within the annular cavity 12 to further facilitate wiring.

In this embodiment, wiring portion still is used for the wiring with external circuit, and for the convenience external circuit is connected with wiring portion, lug 18 and walking hole 11 correspond the setting, and it is located walking hole 11 place side in casing 1, is close mutually with walking hole 11 to when making external circuit's cable penetrate inner chamber 10 from walking hole 11, the wiring portion that is close that can be convenient, and then the wiring. In a preferred embodiment, the projection 18 is provided on the side of the wiring hole 11 so as not to hinder the cable from passing through; in another preferred embodiment, the protrusion 18 shields part of the wire feeding hole 11, and in order to prevent the wire feeding hole from obstructing the penetration of the wire, the area of the wire feeding hole 11 shielded by the protrusion is not more than half of the total area of the wire feeding hole 11, further, not more than one fourth of the total area of the wire feeding hole 11, and further, more than one tenth of the total area of the wire feeding hole 11, so that the wire can be directly penetrated to the wire connection portion while the threading is facilitated, the bending of the wire is reduced, and the welding is more convenient.

In the second embodiment, as shown in fig. 12 and 13, a projection 18 projecting toward the side where the voice coil assembly 4 is located is also provided on the base case portion 14, and the projection 18 is provided in correspondence with the annular cavity 12, i.e., its upper surface (surface facing away from the base case portion 14) is provided toward the annular cavity 12.

In the present embodiment, the circuit board 5 is a rigid circuit board (e.g., PCB board) and includes a main board 50 connected to the base portion 14 and an interposer 53 connected to the bumps 18, and the wiring portions are also disposed on the interposer 53. The number of the bumps 18 is two, and the bumps are respectively located on two sides of the wiring hole 11, and the adapter plate 53 is simultaneously supposed to be on the two bumps 18, and similarly, the distance between the wiring part and the coil 40 is closer, so that the lead-out wires of the coil 40 can be conveniently welded on the wiring part. The adapter plate 53 and the projection 18 can be connected by adhesive or by heat fusion.

Obviously, the bumps 18 may or may not block part of the wiring holes 11, and the number of the bumps 18 is not limited to two.

In the third embodiment, as shown in fig. 4 and 8, the wiring portion of the circuit board 5 includes the soldering posts 54 for connecting with the lead-out wires of the coil 40, the number of the soldering posts 54 is not limited to one, and the number of the soldering posts 54 shown in the drawing is two, and the soldering is performed with the two lead-out wires of the coil 40, respectively. One end of the solder post 54 is connected to and electrically connected to a lead wire drawn out from the coil 40, and the other end is connected to and electrically connected to a circuit of the circuit board 5. The solder posts 54 may be SMT on the circuit board 5, may be soldered on the circuit board 5, or may be riveted on the circuit board 5, although the three connection methods are not limited to one connection method, and two or three connection methods may be implemented simultaneously.

The weld stud 54 is positioned in correspondence with the annular cavity 12 and extends towards the side of the coil 40, so as to be positioned closer to the coil 40, facilitating the welding operation. Preferably, the upper end of the weld stud 54 extends into the annular cavity 12, which is located outside the outer circumference of the coil 40 to facilitate welding.

In the present embodiment, the wiring portion is connected only to the lead-out wire of the coil 40, and the cable of the external circuit is connected to the rest of the circuit board 5. Preferably, the soldering stud 54 is disposed at the end of the circuit board 5 away from the wiring hole 11, and the cable of the external circuit is connected to the end of the circuit board 5 close to the wiring hole 11, so that the soldering stud 54 does not interfere with the soldering of the cable of the external circuit to the circuit board 5, and the soldering is more convenient.

The utility model also provides a bone conduction earphone which comprises the bone conduction sounding device.

The utility model has the following advantages:

2. According to the utility model, the first magnetic conduction piece is provided with the avoiding groove, and the outgoing line of the coil can penetrate out of the avoiding groove, so that the outgoing line can be prevented from being bent excessively, the outgoing line can be more conveniently wired and welded, and the service performance of a product is ensured.

The above is only one embodiment of the present invention, and any other modifications based on the concept of the present invention are considered as the protection scope of the present invention.

Claims

1. A bone conduction sound generating device, comprising:

a housing (1);

the magnetic circuit assembly (3) is arranged in the shell (1);

the voice coil assembly (4) is arranged in the shell (1) and comprises a first magnetic conduction piece (41) and a coil (40) used for driving the magnetic circuit assembly (3) to vibrate, the coil (40) is arranged on the surface, facing the magnetic circuit assembly (3), of the first magnetic conduction piece (41), and an annular cavity (12) is formed between the periphery of the voice coil assembly (4) and the side shell portion (15); and

the circuit board (5) comprises a main board (50) and wiring portions correspondingly arranged with the annular cavity (12), the distance between the wiring portions and the coils (40) is smaller than the distance between the main board (50) and the coils (40), and outgoing lines of the coils (40) are connected with the wiring portions.

2. The bone conduction sound emitting device according to claim 1, wherein the wire connecting portion is located inside the annular cavity (12) and outside an outer peripheral surface of the coil (40).

3. The bone conduction sound-generating device as claimed in claim 1, wherein the first magnetic conductive member (41) is provided with an avoiding groove (410) for leading-out wires of the coil (40) to pass through.

4. The bone conduction sound emitting device according to any one of claims 1 to 3, wherein the housing (1) comprises a base shell portion (14) and a side shell portion (15) connected to the base shell portion (14), the base shell portion (14) is provided with a support boss (17) protruding into the housing (1), the main board (50) is connected to the base shell portion (14), and the first magnetic conductive member (41) is connected to the support boss (17).

5. The bone conduction sound emitting apparatus according to claim 4, wherein the base portion (14) is provided with a projection (18) projecting toward the annular cavity (12), and the wire connecting portion is located on the projection (18).

6. The bone conduction sound-emitting device according to claim 5, wherein the circuit board (5) is a flexible circuit board, and further comprises an extension board (51) connected to the main board (50), the extension board (51) being connected to the projection (18), and the wiring portion being provided on the extension board (51).

7. The bone conduction sound-producing device according to claim 5, wherein the circuit board (5) is a rigid circuit board, and further comprising an adapter plate (53) attached to the projection (18), the wiring portion being provided on the adapter plate (53).

8. The bone conduction sound generating apparatus according to claim 5, wherein the side casing portion (15) is provided with a wiring hole (11), the projection (18) is provided at a side of the wiring hole (11) or the projection (18) covers a portion of the wiring hole (11), and an external circuit is connected to the wiring portion through the wiring hole (11) by a cable.

9. A bone conduction sound emitting device according to any one of claims 1 to 3, wherein the wire connection portion includes a welding post (54) extending toward the annular cavity (12), and a lead-out wire of the coil (40) is welded to the welding post (54).

10. A bone conduction headset comprising the bone conduction sound emitting apparatus as claimed in any one of claims 1 to 9.