WO2021063113A1

WO2021063113A1 - Bone conduction loudspeaker, bone conduction earphone, and bone conduction hearing aid

Info

Publication number: WO2021063113A1
Application number: PCT/CN2020/108417
Authority: WO
Inventors: 朱达云
Original assignee: 朱达云
Priority date: 2019-09-30
Filing date: 2020-08-11
Publication date: 2021-04-08
Also published as: CN110708646A

Abstract

Disclosed in the present invention are a bone conduction loudspeaker, a bone conduction earphone, and a bone conduction hearing aid. The bone conduction loudspeaker comprises: a magnetic assembly; a voice coil; an elastic assembly which comprises a first elastic piece and a second elastic piece, the first elastic piece and the second elastic piece being respectively mounted at two opposite ends of the magnetic assembly, and the voice coil being electrically connected to the first elastic piece or the second elastic piece; a conduction piece which is connected to the second elastic piece; and a supporting part which is separately connected to the first elastic piece and the second elastic piece, wherein a magnetic gap is formed between the magnetic assembly and the supporting part, and the voice coil is mounted in the magnetic gap. During working, the elastic assembly and the magnetic assembly vibrate together; the bone conduction earphone or the bone conduction hearing aid comprises the bone conduction loudspeaker. The bone conduction loudspeaker of the present invention can be made to be small in size, thereby facilitating transmission of a low-frequency sound wave.

Description

Bone conduction speakers, bone conduction headphones and bone conduction hearing aids

Technical field

The invention relates to the technical field of loudspeakers, in particular to bone conduction loudspeakers, bone conduction earphones and bone conduction hearing aids.

Background technique

Bone conduction is a sound conduction method that converts sound into mechanical vibrations of different frequencies, and transmits sound waves through the human skull, bone labyrinth, inner ear lymphatic fluid transmission, spiral organs, auditory nerve, and auditory center. Compared with the classic sound conduction method that generates sound waves through the diaphragm, bone conduction eliminates many steps of sound wave transmission, and can achieve clear sound reproduction in a noisy environment, and sound waves will not affect others due to diffusion in the air. .

Bone conduction speaker technology is used to receive speech. Sound waves (vibration signals) converted from electrical signals are directly transmitted to the auditory nerve through bones. The transmission medium of sound waves (vibration signals) is different.

The current bone conduction speakers are generally worn in front of the ear through ear hoops, and conducted to the human ear through the bone in front of the ear. The inside is after the U iron and the magnet are installed, the shrapnel is installed in the gap between the magnets, and the shrapnel produces vibration. Vibration is not conducive to the transmission of low-frequency sound waves, resulting in poor effect of low-frequency sound waves into the ears. The current wearing method usually has a large speaker volume. If it is made into a miniature size, the volume of the magnet will be reduced and the sound wave transmission effect will be worse.

Summary of the invention

Based on this, it is necessary for the present invention to provide a bone conduction loudspeaker that can be small in size and is beneficial to the transmission of low-frequency sound waves.

The invention also provides a bone conduction earphone.

The invention also provides a bone conduction hearing aid.

In order to achieve the purpose of the present invention, the present invention adopts the following technical solutions:

A bone conduction speaker, including:

Magnetic components

Voice coil

An elastic component, the elastic component includes a first elastic component and a second elastic component, the first elastic component and the second elastic component are respectively installed at opposite ends of the magnetic component, and the voice coil is electrically connected to The first elastic element or the second elastic element;

A conductive element, the conductive element is connected to the second elastic element; and

A support member, the support member respectively connects the first elastic member and the second elastic member, a magnetic gap is formed between the magnetic assembly and the support member, and the voice coil is installed in the magnetic gap;

During operation, the elastic component and the magnetic component vibrate together.

In the above-mentioned bone conduction speaker, since the elastic member is directly installed on both ends of the magnetic component, the magnetic component is not surrounded by the shrapnel. When the volume of the entire speaker is reduced, the volume of the magnetic component is less affected, and the volume of the entire speaker is not reduced. Affect the transmission effect of sound waves; during vibration, because the elastic parts are at both ends, the magnetic circuit in the middle vibrates with the elastic parts, which is beneficial to the response of low-frequency sound waves and improves the sound quality of low-frequency sound waves entering the ear.

In some embodiments, the magnetic component is provided with a through hole.

In some of these embodiments, the bone conduction speaker further includes a circuit board connected to the voice coil, the circuit board is electrically connected to the first elastic member through a conductive member, and the conductive member is accommodated in the through hole .

In some of the embodiments, the magnetic assembly includes at least a first magnetic member and a second magnetic member connected to one end of the first magnetic member, and one of the first magnetic member, the second magnetic member, and the supporting member The magnetic gap is formed between the magnetic gap; the first elastic member is installed at an end of the second magnetic member away from the first magnetic member, and the second elastic member is installed near the first magnetic member away from the first magnetic member. The position of the end of the two magnetic parts.

In some of the embodiments, the magnetic assembly further includes a magnetic conductive member connected to an end of the first magnetic member away from the second magnetic member, the first magnetic member, the second magnetic member, the magnetic conductive member, and The magnetic gap is formed between the supporting members, and the second elastic member is installed at a position close to the magnetic conductive member.

In some of the embodiments, the bone conduction speaker further includes a circuit board electrically connected to the voice coil, and the circuit board is electrically connected to the second elastic member.

In some embodiments, the bone conduction speaker further includes a conductive block with a gap between the second elastic part and the circuit board, and the conductive block connects the conductive part, the second elastic part and the circuit Board, the second elastic member is electrically connected to the circuit board through the conductive block.

In some embodiments, the conductive block includes a positioning block and a conductive element installed in the positioning block, and the positioning block is connected to the second elastic element, the circuit board, and the conductive element, respectively. The conductive member is electrically connected to the second elastic member and the circuit board respectively; or, the conductive block is made of conductive material.

In some embodiments, the second elastic member is attached to and electrically connected to the circuit board, and the outer edge of the second elastic member is provided with a protrusion protruding away from the circuit board to A vibration space is formed between the protrusion and the voice coil.

In some embodiments, the shape of the protrusions is arc or square, the number of protrusions is one, two or more, and a plurality of protrusions are arranged continuously or at intervals.

In some embodiments, the outer edge of the second elastic member is provided with a fixing member for fixing the second elastic member on a side away from the supporting member.

In some embodiments, the second elastic member is made of a hard material and has a built-in circuit element, and the voice coil is connected to the second elastic member and electrically connected to the circuit element.

The present invention also provides a bone conduction earphone, including the bone conduction speaker.

The present invention also provides a bone conduction hearing aid, including the bone conduction speaker.

Description of the drawings

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

2 is a schematic structural diagram of a bone conduction speaker according to another embodiment of the present invention;

Fig. 3 is a schematic structural diagram of the bone conduction speaker according to the third embodiment of the present invention.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention.

Example one

1, the present invention provides a bone conduction speaker 100, including a magnetic component 10, a voice coil 20, an elastic component 30, a conductive member 40 and a supporting member 50. The magnetic component 10 is used to provide a magnetic field, and the voice coil 20 is used to energize To generate vibration in a magnetic field, the elastic assembly 30 includes a first elastic member 31 and a second elastic member 32. The first elastic member 31 and the second elastic member 32 are respectively installed at opposite ends of the magnetic assembly 10, and the voice coil 20 is electrically connected. On the first elastic member 31 or the second elastic member 32, the supporting member 50 connects the first elastic member 31 and the second elastic member 32, respectively, a magnetic gap 11 is formed between the magnetic assembly 10 and the supporting member 50, and the voice coil 20 is installed thereon Within the magnetic gap 11. During operation, the elastic component 30 and the magnetic component 10 vibrate together.

During operation, the voice coil 20 is energized and vibrates in the magnetic field. The frequency response range and sound quality of the bone conduction speaker will be affected by the vibration system. Since the magnetic component 10 is between the elastic components 30, the elastic component 30 and the magnetic component 10 vibrate together. This vibration mode is conducive to the response of low-frequency sound waves and improves The sound quality of low-frequency sound waves.

In addition, since the elastic members are directly installed on the two ends of the magnetic assembly 10, the magnetic assembly 10 is not surrounded by the elastic members. When the volume of the entire speaker is reduced, the volume of the magnetic assembly 10 can be larger or unchanged, and the volume of the magnetic assembly 10 is affected by If the impact is small, the sound wave transmission effect will not be affected when the volume of the entire speaker is reduced.

Wherein, the magnetic component 10 is provided with a through hole 120. The provision of the through hole 120 is beneficial to dissipate the heat generated in the vibration process. Moreover, when the voice coil 20 is electrically connected to the first elastic member 31, the voice coil 20 is connected to the first elastic member 31 through a conductive member, and the conductive member can be pulled to the first elastic member 31 by the through hole 120. In this way, the voice coil 20 can be connected to the first elastic member 31 or the second elastic member 32. When the voice coil 20 is electrically connected to the first elastic member 31, it is convenient to weld an external circuit to energize the voice coil 20. Such a welding structure can reduce distortion, enhance air compliance, and improve the overall speaker effect.

Wherein, the magnetic assembly 10 includes at least a first magnetic member 12 and a second magnetic member 13 connected to one end of the first magnetic member 12, and the above-mentioned magnetic member is formed between the first magnetic member 12, the second magnetic member 13 and the supporting member 50. Gap 11. The connection of the first magnetic member 12 and the second magnetic member 13 allows the elastic member to be conveniently installed on both ends of the magnetic assembly 10 without affecting the cooperation between the magnetic circuit and the voice coil.

Wherein, the first magnetic member 12 has a ring shape. The second magnetic member 13 is in a T shape. The two opposite sides of the second magnetic member 13 are connected to the first magnetic member 12, and the middle is connected to the first elastic member 31.

Of course, the first magnetic member 12 and the second magnetic member 13 may also adopt other shapes.

One of the first magnetic member 12 and the second magnetic member 13 is a magnet, and the other is a magnet or a metal that can be magnetically attracted to the magnet. For example, the first magnetic member 12 is a magnet, the second magnetic member 13 is metallic iron, or the first magnetic member 12 is metallic iron, and the second magnetic member 13 is a magnet, or the first magnetic member 12 and the second magnetic member 13 are both As a magnet, both can achieve the purpose of generating a magnetic circuit.

Of course, the magnetic component 10 may also include three or more magnetic components, as long as the first elastic component 31 and the second elastic component 32 are located at the two ends of the magnetic component 10. Of course, there is a tendency to choose fewer magnetic components to form the magnetic assembly 10, so that the overall connection structure is more stable.

Further, the above-mentioned magnetic assembly 10 further includes a magnetic conductive member 14 connected to an end of the first magnetic member 12 away from the second magnetic member 13, and the magnetic conductive member 14 is connected to an end of the first magnetic member 12 away from the second magnetic member 13 , Used for magnetic permeability. The second elastic member 32 is installed at a position close to the magnetic conductive member 14. For example, the magnetic conductive member 14 is a washer.

The above-mentioned first magnetic member 12 is provided with a first through hole, the second magnetic member 13 is provided with a second through hole, and the magnetic conductive member 14 is provided with a third through hole. The three through holes collectively form the aforementioned through hole 120.

The function of the voice coil 20 is to cut the lines of magnetic force and generate electromotive force. As long as this function can be completed, the shape, structure, and material of the voice coil 20 are not limited.

The voice coil 20 is located in the space enclosed by the first magnetic member 12, the second magnetic member 13 and the supporting member 50, that is, the magnetic gap 11. In this way, the entire loudspeaker forms a whole, which is conducive to installing the shell later.

The aforementioned bone conduction speaker 100 further includes a circuit board 21, and the voice coil 20 is electrically connected to the first elastic member 31 or the second elastic member 32 through the circuit board 21. This enhances the stability of the electrical connection. The circuit board 21 may be a PCB board, or a rubber sheet or metal plate with built-in circuits, which can function as an electrical connection to the voice coil 20, the first elastic member 31 or the second elastic member 32.

When the voice coil 20 is electrically connected to the first elastic member 31 through the circuit board 21, the circuit board 21 is connected to the first elastic member 31 through a conductive member, and the conductive member can be pulled to the first elastic member 31 by the through hole 120.

Both the first elastic element 31 and the second elastic element 32 are steel sheets or plastics with built-in circuits. Alternatively, the first elastic member 31 and the second elastic member 32 may also be conductive metal sheets, both of which can transmit vibration.

The first elastic member 31 is installed at an end of the second magnetic member 13 away from the first magnetic member 12, and the second elastic member 32 is installed at a position close to the end of the first magnetic member 12 away from the second magnetic member 13, or the magnetic conductive member 14 is far away The position of one end of the second magnetic member 13. Such a structure makes the voice coil 20 have a large vibration space, and can ensure the stability of the overall vibration of the magnetic circuit.

In this embodiment, there is a gap between the second elastic member 32 and the circuit board 21. This leaves room for the vibration of the second elastic member 32, improves the sound quality of the speaker, and reduces distortion.

When the voice coil 20 is electrically connected to any one of the first elastic member 31 or the second elastic member 32, the electrically connected first elastic member 31 or the second elastic member 32 is provided with a pad to facilitate electrical connection with an external circuit, so that The entire speaker is electrically conductive.

In one embodiment, in order to facilitate the connection of the external circuit, when the second elastic member 32 is electrically connected to the voice coil 20, the circuit of the second elastic member 32 can also be led to the first elastic member 31, and the first elastic member 31 is set Pads or circuit boards to connect external circuits. For example, the circuit of the second elastic member 32 is wound to the first elastic member 31 through the supporting member 50.

The conductive member 40 is an element used for vibration and sound transmission, and is connected to the second elastic member 32. When the second elastic member 32 vibrates, the vibration is transmitted to the conductive member 40. The conductive member 40 can generally be a piezoelectric ceramic sheet, a PC conductive sheet, or other conductive elements.

The function of the supporting member 50 is to support the first elastic member 31 and the second elastic member 32, and provide support so that it will not be greatly deformed, so that the magnetic circuit system can jointly generate vibration and ensure the stability of the structure. The supporting member 50 may be made of materials such as plastic, iron, low carbon steel, etc., for example. The connection between the supporting member 50 and the first elastic member 31 and the second elastic member 32 may adopt a method such as gluing, connecting member connection, or the like.

The shape of the supporting member 50 is a ring as a whole, which is convenient to cooperate with the above-mentioned structure.

Furthermore, the aforementioned bone conduction speaker 100 further includes a conductive block 60 connected to the conductive member 40, the second elastic member 32 and the circuit board 21, and the second elastic member 32 is electrically connected to the circuit board 21 through the conductive block 60. The conductive block 60 can make the second elastic member 32 and the circuit board 21 not contact but electrically conduct.

Wherein, the conductive mode of the conductive block 60 can be set as required, and it can conduct electricity by itself, or it can be conductive by providing a conductive member. For example, the conductive block 60 includes a positioning block and a conductive element installed in the positioning block, and the positioning block is connected to the second elastic element 32, the circuit board 21, and the conductive element 40, respectively. Alternatively, the conductive block 60 is made of a conductive material, and the conductive block 60 directly contacts and electrically connects to the second elastic member 32 and the circuit board 21.

In one embodiment, the aforementioned conductive element is a conductive spring.

The above-mentioned bone conduction speaker 100 may further include a housing, which covers the various components mentioned above, so that the whole speaker can directly contact the human body. The above-mentioned housing can be provided with a loudspeaker hole.

Example two

Please refer to FIG. 2, the bone conduction speaker 200 of this embodiment has basically the same structure as the first embodiment, except that it does not contain the conductive block 60, and the second elastic member 32 is directly attached to the circuit board and electrically connected. 21. A protrusion 33 protruding away from the circuit board 21 is provided on the outer edge of the second elastic member 32, so that a vibration space is formed between the protrusion 33 and the voice coil 20. This leaves enough space for the magnetic circuit system to vibrate.

The shape of the protrusion 33 is arc or square, the number of the protrusion 33 is one, two or more, and the plurality of protrusions 33 can be arranged continuously or at intervals. The size of the protrusion 33 can also be set as required.

For example, a plurality of arc-shaped protrusions 33 are arranged at intervals, and one or more protrusions 33 correspond to the positions of the voice coil 20.

The outer edge of the second elastic member 32 is connected to the supporting member 50.

A fixing member 70 for fixing the outer edge of the second elastic member 32 is provided on a side of the outer edge of the second elastic member 32 away from the supporting member 50. The fixing member 70 can further fix the outer edge of the second elastic member 32 to ensure that the second elastic member 32 will not be separated from the fixing member 70 during the vibration process.

For example, the fixing member 70 is a pressure ring. The material of the pressing ring may be the same as the material of the supporting member 50, for example, the pressing ring is a copper ring.

Example three

3, the bone conduction speaker 300 in this embodiment has basically the same structure as the first embodiment, except that it does not contain the conductive block 60 and the circuit board 21, and the second elastic member 32 is made of hard material. The voice coil 20 is connected to the second elastic element 32 and electrically connected to the circuit element, so that the voice coil 20 can be directly electrically connected to the second elastic element 32. At this time, there is no need to provide the conductive block 60 and the circuit board 21, and the structure of the entire speaker is simpler and can realize the magnetic circuit vibration.

For example, the first elastic element 31 and the second elastic element 32 are both steel sheets or plastics with built-in circuits.

Wherein, a through hole 120 may or may not be provided in the middle of the magnetic component 10, and FIG. 3 shows a case where the through hole 120 is not provided.

Example four

This embodiment provides a bone conduction earphone, which includes the bone conduction speaker of any one of the first to the third embodiment. After the bone conduction speaker is installed in the bone conduction earphone, the bone conduction earphone can be made smaller and the sound quality is better.

Example five

This embodiment provides a bone conduction hearing aid, which includes the bone conduction speaker of any one of the first to the third embodiment. After the bone conduction speaker is installed in the bone conduction hearing aid, the bone conduction hearing aid can be made smaller and the sound quality is better.

The above-mentioned embodiments only express several implementation modes of the present invention, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

A bone conduction speaker, characterized in that it comprises:

Magnetic components

Voice coil

An elastic component, the elastic component includes a first elastic component and a second elastic component, the first elastic component and the second elastic component are respectively installed at opposite ends of the magnetic component, and the voice coil is electrically connected to The first elastic element or the second elastic element;

A conductive element, the conductive element is connected to the second elastic element; and

A support member, the support member respectively connects the first elastic member and the second elastic member, a magnetic gap is formed between the magnetic assembly and the support member, and the voice coil is installed in the magnetic gap;

During operation, the elastic component and the magnetic component vibrate together.
The bone conduction speaker according to claim 1, wherein the magnetic component is provided with a through hole.
The bone conduction speaker according to claim 2, wherein the bone conduction speaker further comprises a circuit board connected to the voice coil, and the circuit board is electrically connected to the first elastic member through a conductive member, and the conductive The component is accommodated in the through hole.
The bone conduction speaker according to claim 1 or 2, wherein the magnetic component at least comprises a first magnetic member and a second magnetic member connected to one end of the first magnetic member, and the first magnetic member 2. The magnetic gap is formed between the second magnetic member and the supporting member; the first elastic member is mounted on an end of the second magnetic member away from the first magnetic member, and the second elastic member is mounted on It is close to the position of the end of the first magnetic member away from the second magnetic member.
The bone conduction speaker according to claim 4, wherein the magnetic assembly further comprises a magnetic conductive member connected to an end of the first magnetic member away from the second magnetic member, the first magnetic member, The magnetic gap is formed between the second magnetic member, the magnetic conductive member and the supporting member, and the second elastic member is installed at a position close to the magnetic conductive member.
The bone conduction speaker according to claim 1, wherein the bone conduction speaker further comprises a circuit board electrically connected to the voice coil, and the circuit board is electrically connected to the second elastic member.
The bone conduction speaker according to claim 6, wherein the bone conduction speaker further comprises a conductive block, a gap is provided between the second elastic member and the circuit board, and the conductive block is connected to the conductive member , A second elastic member and the circuit board, the second elastic member is electrically connected to the circuit board through the conductive block.
The bone conduction speaker according to claim 7, wherein the conductive block comprises a positioning block and a conductive element installed in the positioning block, and the positioning block is respectively connected to the second elastic element and the circuit The board and the conductive member, the conductive member is electrically connected to the second elastic member and the circuit board, respectively; or, the conductive block is made of conductive material.
The bone conduction speaker according to claim 6, wherein the second elastic member is attached to and electrically connected to the circuit board, and an outer edge of the second elastic member is provided with a direction away from the circuit board. A convex part protruding in the direction, so that a vibration space is formed between the convex part and the voice coil.
The bone conduction speaker according to claim 9, wherein the shape of the protrusion is arc or square, the number of the protrusion is one, two, or more, and there are a plurality of protrusions. The starting part is set continuously or at intervals.
The bone conduction speaker according to claim 9 or 10, wherein the outer edge of the second elastic member is provided with a fixing member for fixing the second elastic member on a side away from the supporting member.
The bone conduction speaker according to claim 1 or 2, wherein the second elastic member is made of a hard material and has a built-in circuit element, and the voice coil is connected to the second elastic member and electrically connected to the述circuit element.
A bone conduction earphone, characterized by comprising the bone conduction speaker according to any one of claims 1-12.
A bone conduction hearing aid, characterized by comprising the bone conduction speaker according to any one of claims 1-12.