WO2021143118A1

WO2021143118A1 - Bone conduction loudspeaker and composite loudspeaker

Info

Publication number: WO2021143118A1
Application number: PCT/CN2020/108412
Authority: WO
Inventors: 朱达云
Original assignee: 朱达云
Priority date: 2020-01-19
Filing date: 2020-08-11
Publication date: 2021-07-22
Also published as: CN111182426A

Abstract

Disclosed is a bone conduction loudspeaker, comprising a bottom plate, a lower magnet, a lower coil, an upper magnet, an upper coil, a vibrating plate, a centering support plate, and a conduction member. The lower magnet is fixedly provided on the bottom plate. The lower coil is annularly provided on the inner side of the lower magnet. The upper magnet is fixedly provided above the lower magnet. The lower magnet is separated from the upper magnet. A first magnetic gap is formed between the lower magnet and the upper magnet. Two magnetic poles on the upper and lower sides of the first magnetic gap are different magnetic poles. The upper coil is annularly provided on the inner side of the upper magnet. A through hole is formed in the upper coil. The vibrating plate is suspended in the first magnetic gap, and the periphery of the vibrating plate is fixed between the upper magnet and the lower magnet. The centering support plate is fixedly provided above the upper magnet. The conduction member is movably provided in the through hole, the root of the conduction member is fixedly connected to the vibrating plate, and the top of the conduction member penetrates through the centering support plate. The present invention further provides a composite loudspeaker, comprising an air conduction loudspeaker and the bone conduction loudspeaker. The bone conduction loudspeaker is fixedly provided on the air conduction loudspeaker.

Description

Bone conduction loudspeaker and compound loudspeaker

Technical field

The invention belongs to the technical field of loudspeakers, and in particular relates to a bone conduction loudspeaker and a composite loudspeaker.

Background technique

The speakers in the prior art are mainly divided into air conduction speakers and bone conduction speakers. The air conduction speaker generates sound through the vibration of the diaphragm, which is transmitted to the human ear through air transmission. Bone conduction speakers conduct sound through the principle of bone conduction. Air conduction speakers have the advantages of high audio separation and reproduction. Bone conduction is the use of human skull, inner ear lymph fluid, auditory nerve and other carriers to transmit sound waves, so that people can hear sounds. Using bone conduction headphones, there is no need to plug the ears, which can open the ears and reduce the damage to the tympanic membrane. Even in noisy situations, the voice of the other party can be heard clearly.

The speaker in the prior art is a single air conduction speaker or a single bone conduction speaker, so the advantages of the two speakers cannot be combined at the same time.

Summary of the invention

The purpose of the present invention is to provide a bone conduction speaker and a composite speaker, which aims to solve the problem that the speaker in the prior art is a single air conduction speaker or a single bone conduction speaker, and cannot be combined with an air conduction speaker and a bone conduction speaker. The technical issue of the advantages of these two speakers.

To achieve the above objective, the present invention provides a bone conduction speaker, which includes a bottom plate; the bone conduction speaker also includes:

A lower magnet, the lower magnet is fixed on the bottom plate;

A lower coil, the lower coil is looped on the inner side of the lower magnet;

The upper magnet, the upper magnet is fixed above the lower magnet; the lower magnet is separated from the upper magnet, a first magnetic gap is formed between the two, and the first magnetic gap is upper and lower The two magnetic poles on the side are different-named magnetic poles;

The upper coil, the upper coil is looped on the inner side of the upper magnet, and a through hole is formed in the upper coil;

A vibrating plate, wherein the vibrating plate is suspended in the first magnetic gap, and its periphery is fixed between the upper magnet and the lower magnet;

A centering support piece, the centering support piece is fixed above the upper magnet; and

The conductive member is movably arranged in the through hole, its root is fixedly connected to the vibrating plate, and the top of the conductive member passes through the centering support plate.

Preferably, the conductive member includes:

A conductive column, the conductive column can be movably arranged in the through hole, its root is fixedly connected to the vibrating plate, and the top of the conductive column passes through the centering support plate; and

The conductive sheet is fixed on the top of the conductive column.

Preferably, the bone conduction speaker further includes a first housing, and the lower magnet and the upper magnet are accommodated in the first housing.

Preferably, the first housing has a top opening and a bottom opening that are opposed to each other, the periphery of the bottom plate is fixedly connected to the periphery of the bottom opening, and the periphery of the centering branch is fixed to the periphery of the top opening. connect.

Preferably, the bone conduction speaker further includes a support member, the centering support piece is fixed on the upper magnet, and the periphery of the centering support piece is fixedly connected to the top of the support member.

Preferably, the bottom surface of the upper magnet is fixedly provided with an upper gasket, the top surface of the lower magnet is fixedly provided with a lower gasket, and the periphery of the vibrating plate is clamped between the upper gasket and the lower gasket. Between the spacers.

Preferably, the vibration plate is a metal vibration plate or a metal composite material vibration plate; the centering support plate is an elastic plate or an elastic support member; the bottom plate is a lower pole plate or a first PCB board; The top surface is fixedly provided with a top plate; the top plate is an upper pole plate or a shell extension part, and the shell extension part is fixedly connected with the inner wall of the first shell.

Preferably, the upper magnet has a ring shape or a strip shape; the number of the upper magnets in a strip shape is at least two and is arranged symmetrically; the lower magnet has a ring shape or a strip shape; The number of lower magnets is at least two and is arranged symmetrically.

The present invention also provides a composite speaker, including:

Air conduction speakers, and

In the above-mentioned bone conduction speaker, the bone conduction speaker is fixed on the air conduction speaker.

Preferably, the air conduction speaker has a second housing, and a partition is provided in the second housing, and the partition separates the internal cavity of the second housing into a first cavity and a second cavity The bone conduction speaker is accommodated on the partition plate and is accommodated in the first cavity; the conductive member extends from the top wall of the first cavity, and the first cavity A sound guide hole is provided on the top wall.

The above-mentioned one or more technical solutions in the bone conduction speaker and the composite speaker provided by the embodiments of the present invention have at least one of the following technical effects:

1. When the bone conduction speaker works, the upper coil and the lower coil generate a magnetic field after being energized, the vibrating plate vibrates and drives the conductive part, thereby converting the electrical signal into an audio signal; compared to the moving coil type bone conduction speaker, the bone conduction speaker In the signal conversion process, the loss is smaller, especially the high-frequency audio signal, so the bone conduction speaker has the characteristics of good high-frequency performance;

2. Since the moving coil type bone conduction speaker in the prior art requires more space in the process of sounding, and the air is involved in the vibration process, the sound leakage phenomenon cannot be effectively controlled; it is different from the moving coil type bone conduction of the prior art. Compared with the speaker, the bone conduction speaker also has a small volume, which effectively reduces the area of the ear part, and reduces the sound waves radiated to the air, thereby reducing sound leakage;

3. The composite speaker combines an air conduction speaker and a bone conduction speaker. When in use, the two can be switched with each other, and it has the advantages of both air conduction speaker and bone conduction speaker; and the air conduction speaker is a moving coil speaker , With excellent bass performance, combined with the bone conduction speaker, it can output full-range high-resolution audio.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are merely of the present invention. For some embodiments, for those of ordinary skill in the art, other drawings may be obtained based on these drawings without creative labor.

FIG. 1 is a schematic structural diagram of a bone conduction speaker provided by Embodiment 1 of the present invention.

FIG. 2 is a schematic structural diagram of a bone conduction speaker provided by Embodiment 2 of the present invention.

Fig. 3 is a schematic structural diagram of a composite speaker provided by Embodiment 3 of the present invention.

Fig. 4 is a schematic structural diagram of a composite speaker provided by Embodiment 4 of the present invention.

FIG. 5 is a schematic structural diagram of a composite speaker provided by Embodiment 5 of the present invention.

Fig. 6 is a schematic structural diagram of a composite speaker provided by Embodiment 6 of the present invention.

Detailed ways

The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the embodiments of the present invention, but should not be construed as limiting the present invention.

Example 1

A bone conduction speaker 100 of this embodiment includes a bottom plate 1112, a lower magnet 120, a lower coil 130, an upper magnet 140, an upper coil 150, a vibrating plate 160, a centering support piece 190, and a conductive member 170. The lower magnet 120 is fixed on the bottom plate 1112. The lower coil 130 is looped around the inner side of the lower magnet 120. The upper magnet 140 is fixed above the lower magnet 120. The lower magnet 120 is separated from the upper magnet 140, and a first magnetic gap 180 is formed therebetween. The two magnetic poles on the upper and lower sides of the first magnetic gap 180 have different names. In this embodiment, the two magnetic poles are the S magnetic pole 141 of the upper magnet 140 and the N magnetic pole 121 of the lower magnet 120 respectively. The upper coil 150 is looped around the inner side of the upper magnet 140, and a through hole is formed in the upper coil 150. The vibrating plate 160 is suspended in the first magnetic gap 180, and its periphery is fixed between the upper magnet 140 and the lower magnet 120. The centering support piece 190 is fixed above the upper magnet 140. The conductive member 170 can be movably arranged in the through hole, its root is fixedly connected to the vibrating plate 160, and its top passes through the centering support plate 190.

When the bone conduction speaker 100 is in operation, the upper coil 150 and the lower coil 130 are energized to generate a magnetic field, and the vibrating plate 160 vibrates and drives the conductive member 170, thereby converting electrical signals into audio signals. Compared with a moving coil type bone conduction speaker, the bone conduction speaker 100 loses less in the signal conversion process, especially high-frequency audio signals. Therefore, the bone conduction speaker has the characteristics of good high-frequency performance.

Since the moving coil type bone conduction speaker requires more space during the sound production process, and the air participates in the vibration process, the sound leakage phenomenon cannot be effectively controlled. Therefore, compared with the moving coil type bone conduction speaker in the prior art, the bone conduction speaker 100 also has a small volume, effectively reduces the area of the ear part, and reduces the sound waves radiated to the air and reduces the sound leakage.

The conductive member 170 includes a conductive pillar 171 and a conductive sheet 172. The conductive column 171 is movably arranged in the through hole, its root is fixedly connected to the vibrating plate 160, and its top passes through the centering support plate 190. The conductive sheet 172 is fixed on the top of the conductive pillar 171. During operation, the vibration generated by the vibrating plate 160 is transmitted to the conductive plate 172 through the conductive column 171, and the conductive plate 172 conducts sound through the principle of bone conduction. In this conduction process, the signal loss is small.

The first housing 110 has a top opening and a bottom opening that are oppositely arranged, the periphery of the bottom plate 1112 is fixedly connected to the periphery of the bottom opening, and the periphery of the centering support piece 190 is fixedly connected to the periphery of the top opening. .

The bone conduction speaker 100 further includes a support 143, the centering support piece 190 is fixed on the upper magnet 140, and the periphery of the centering support piece 190 is fixedly connected to the top of the support 143.

The bottom surface of the upper magnet 140 is fixed with an upper gasket 161, the top surface of the lower magnet 120 is fixed with a lower gasket 162, and the periphery of the vibrating plate 160 is clamped between the upper gasket 161 and the upper gasket 161. Describe between the spacers 162. The upper spacer 161 and the lower spacer 162 function to fix the vibrating plate 160 and suspend the vibrating plate 160 in the air.

The vibration plate 160 is a metal vibration plate and a metal composite material vibration plate. The centering support piece 190 is an elastic piece, and the elastic piece is a conductive elastic piece. The centering support piece 190 also functions as an electrical connection. It is made of a composite conductive material and has a circuit formed thereon, and its surface is also provided with multiple sets of positive and negative electrode pads. The power lines of the lower coil 130 and the upper coil 150 are connected to the conductive elastic sheet, and the conductive elastic sheet is connected to an external circuit, which has the advantage of simplifying the circuit structure.

The bottom plate 1112 is the bottom plate. The top surface of the upper magnet 140 is fixedly provided with a top plate 142. The top plate 142 is an upper electrode plate. The upper magnet 140 has a ring shape. The lower magnet 120 has a ring shape.

Example 2

Referring to FIG. 2, the difference between this embodiment and Embodiment 1 is that the bone conduction speaker 100 further includes a first housing 110, and the lower magnet 120 and the upper magnet 140 are accommodated in the first housing 110 Inside. The first housing 110 plays a supporting role. The centering support piece 190 is an elastic support member. The vibrating plate 160 is a metal composite material vibrating plate, and the metal composite material vibrating plate is a plastic material vibrating plate with a metal plating layer on its surface, which has the characteristics of light weight. The bottom plate 1112 is a first PCB board. The power lines of the lower coil 130 and the upper coil 150 are connected to the first PCB board, and the first PCB board is connected to an external circuit.

The top plate 142 is an extension of the housing. The housing extension is fixedly connected to the inner wall of the first housing 110.

The upper magnets 140, 140' are strip-shaped. The number of the upper magnets 140, 140' in a strip shape is two, and the two upper magnets 140, 140' are arranged symmetrically. The lower magnets 120, 120' are strip-shaped. The number of the strip-shaped lower magnets 120, 120' is two, and the two lower magnets 120, 120' are arranged symmetrically.

The rest of this embodiment is the same as that of Embodiment 1. For the features that are not explained in this embodiment, the explanation of Embodiment 1 is adopted, and will not be repeated here.

Example 3

2 and 3, this embodiment provides a composite speaker, including an air conduction speaker 200 and the bone conduction speaker 100 provided in the second embodiment. The bone conduction speaker 100 is fixed on the air conduction speaker 200.

The air conduction speaker 200 includes a second housing 210, a magnetic unit 220 a, a diaphragm 230 and a voice coil 240. The bone conduction speaker 100 is fixed on the second housing 210. The magnetic unit 220 is accommodated in the second housing 210, and a second magnetic gap 221 is formed in the magnetic unit 220. The diaphragm 230 is suspended in the second housing 210, and its periphery is fixedly connected to the second housing 210. The voice coil 240 is fixedly connected to the diaphragm 230 and extends into the second magnetic gap 221.

When the air conduction speaker 200 is working, the voice coil 240 is energized to generate an electromotive force and drive the diaphragm 230 to vibrate to generate sound. The air conduction speaker 200 is a moving coil speaker with good low frequency performance.

The magnetic unit 220a includes a first U iron 222a, a first magnet 223a, and a first washer 224a. The side wall of the first U-iron 222a is provided with an outwardly extending extension 2221a, and the side wall of the first U-iron 222a is fixedly connected to the second housing 210 through the extension 2221a. The periphery of the diaphragm 230 is fixedly connected to the first U iron 222a. The first magnet 223a is fixed on the first U iron 222a, and the second magnetic gap 221 is enclosed by the side surface of the first magnet 223a and the side wall of the first U iron 222a Annular gap. The first magnet 223a forms a magnetic field in the second magnetic gap 221.

The first washer 224a is provided on the top surface of the first magnet 223a. The first washer 224a plays a role of magnetic permeability.

The top wall of the second housing 210 is provided with a fourth sound guide hole 211. The fourth sound guide hole 211 functions to conduct sound outward.

The composite speaker combines the air conduction speaker 200 and the bone conduction speaker 100. When in use, the two can be switched with each other. At the same time, it has the advantages of both the air conduction speaker 200 and the bone conduction speaker 100; and the air conduction speaker 200 is mobile. The coil speaker has excellent bass performance. When combined with the bone conduction speaker 100, it can output high-resolution audio in the full frequency range.

Example 4

Please refer to FIG. 4, the difference between this embodiment and Embodiment 3 is that the magnetic unit 220b provided in this embodiment has a first sound guide hole 22211 provided on the extension 2221b of the first U iron 222b. A first tuning net 22212 is provided on the first sound guide hole 22211, and the first tuning net 22212 plays a role of tuning. A diaphragm support 22213 is fixed on the first sound guide hole 22211, and the periphery of the diaphragm 230 is also fixedly connected to the diaphragm support 22213. The diaphragm support 22213 functions to fix and support the diaphragm 230.

A second sound guide hole 225 sequentially penetrates the bottom wall of the first U iron 222b, the first magnet 223b and the first washer 224b. Specifically, the second sound guide hole 225 is also located in the Below the middle of the diaphragm 230, the low frequency effect can be further enhanced. A second tuning net 2251 is provided on the second sound guide hole 225. The second tuning net 2251 plays a role of tuning.

A second PCB board 2222 is provided on the bottom surface of the first U iron 222b, and the second sound guide hole 225 also penetrates the second PCB board 2222. The second PCB board 2222 functions as a power supply. The power cord of the bone conduction speaker 100 and the voice coil 240 are both connected to the second PCB board 2222, and then electrically connected to an external circuit.

The rest of this embodiment is the same as that of Embodiment 3. For the features that are not explained in this embodiment, the explanation of Embodiment 3 is adopted, and will not be repeated here.

Example 5

Referring to FIG. 5, the difference between this embodiment and Embodiment 3 is that the magnetic unit 220c provided in this embodiment includes a second U iron 222c, a second magnet 223c, a second washer 224c, a third magnet 226, and a second U iron 222c. Three Huasi 227 and the third PCB board 228. The side wall of the second U iron 222c is fixedly connected to the second housing 210, and the periphery of the diaphragm 230 is fixedly connected to the second U iron 222c. The second magnet 223c is fixed on the second U iron 222c. The second washer 224c is arranged on the top surface of the second magnet 223c. The third magnet 226 has a ring shape, which is fixed on the second U iron 222c and sleeved on the outside of the second magnet 223c, and the second magnetic gap 221 is outside the second magnet 223c. An annular gap formed by the side surface and the inner ring surface of the third magnet 226, and the third magnet 226 and the second magnet 223c form a magnetic field in the second magnetic gap 221. The magnetic unit 220c is a dual-magnetic magnetic unit, which achieves the purpose of enhancing the magnetic field. The third washer 227 is disposed on the top surface of the third magnet 226, and the third washer 227 functions as a magnetic conductor. The third PCB board 228 is fixed on the bottom surface of the second U iron 222c. The third PCB board 228 functions as a power supply.

A third sound guide hole 229 sequentially penetrates the third PCB board 228, the bottom wall of the second U iron 222c, the second magnet 223c and the second washer 224c, and the third sound guide hole 229 is located Below the middle of the diaphragm 230, the low frequency effect can be further enhanced. A third tuning net 2291 is provided on the third sound guide hole 229. The third tuning net 2291 plays the role of tuning.

Example 6

Referring to FIG. 6, the difference between this embodiment and the fifth embodiment is that the second housing 210 is provided with a partition 212, and the partition 212 separates the internal cavity of the second housing 210 into a first A cavity 213 and a second cavity 214; the bone conduction speaker 100 is accommodated on the partition 212 and is accommodated in the first cavity 213; the conductive member 170 is removed from the first cavity The top wall of the cavity 213 extends, and the top wall of the first cavity 213 is provided with a fifth sound guide hole 2131.

The rest of this embodiment is the same as that of Embodiment 5. For the features that are not explained in this embodiment, the explanation of Embodiment 5 is adopted, and will not be repeated here.

The above descriptions are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included in the protection of the present invention. Within range.

Claims

A bone conduction loudspeaker, including a bottom plate; and is characterized in that it also includes:

A lower magnet, the lower magnet is fixed on the bottom plate;

A lower coil, the lower coil is looped on the inner side of the lower magnet;

The upper magnet, the upper magnet is fixed above the lower magnet; the lower magnet is separated from the upper magnet, a first magnetic gap is formed between the two, and the first magnetic gap is upper and lower The two magnetic poles on the side are different-named magnetic poles;

The upper coil, the upper coil is looped on the inner side of the upper magnet, and a through hole is formed in the upper coil;

A vibrating plate, wherein the vibrating plate is suspended in the first magnetic gap, and its periphery is fixed between the upper magnet and the lower magnet;

A centering support piece, the centering support piece is fixed above the upper magnet; and

The conductive member is movably arranged in the through hole, its root is fixedly connected to the vibrating plate, and the top of the conductive member passes through the centering support plate.
The bone conduction speaker according to claim 1, wherein the conductive member comprises:

A conductive column, the conductive column can be movably arranged in the through hole, its root is fixedly connected to the vibrating plate, and the top of the conductive column passes through the centering support plate; and

The conductive sheet is fixed on the top of the conductive column.
The bone conduction speaker according to claim 1, further comprising a first housing, and the lower magnet and the upper magnet are accommodated in the first housing.
The bone conduction loudspeaker according to claim 3, wherein the first housing has a top opening and a bottom opening oppositely arranged, the periphery of the bottom plate is fixedly connected to the periphery of the bottom opening, and the centering support The periphery of the sheet is fixedly connected with the periphery of the top opening.
The bone conduction speaker according to claim 1, further comprising a support member, the centering support piece is fixed on the upper magnet, and the periphery of the centering support piece is connected to the top of the support member. Fixed connection.
The bone conduction speaker according to claim 1, wherein the bottom surface of the upper magnet is fixedly provided with an upper gasket, the top surface of the lower magnet is fixedly provided with a lower gasket, and the periphery of the vibrating plate is clamped It is fixed between the upper gasket and the lower gasket.
The bone conduction speaker according to any one of claims 1 to 6, wherein the vibration plate is a metal vibration plate or a metal composite material vibration plate; the centering support plate is an elastic plate or an elastic support member; The bottom plate is a lower pole plate or a first PCB board; the top surface of the upper magnet is fixedly provided with a top plate; the top plate is an upper pole plate or a housing extension, and the housing extension is fixedly connected to the inner wall of the first housing .
The bone conduction speaker according to any one of claims 1 to 6, wherein the upper magnet is ring-shaped or strip-shaped; the number of the strip-shaped upper magnets is at least two and is arranged symmetrically; The lower magnet is ring-shaped or strip-shaped; the number of the strip-shaped lower magnets is at least two and is arranged symmetrically.
The composite speaker is characterized in that it includes:

Air conduction speakers, and

The bone conduction speaker according to any one of claims 1 to 8, wherein the bone conduction speaker is fixed on the air conduction speaker.
The composite speaker according to claim 9, wherein the air conduction speaker has a second housing, and a partition is provided in the second housing, and the partition divides the internal cavity of the second housing. It is divided into a first cavity and a second cavity; the bone conduction speaker is accommodated on the partition board and is accommodated in the first cavity; the conductive member extends from the top of the first cavity The wall extends, and a sound guide hole is provided on the top wall of the first cavity.