Bone conduction speaker and composite speaker

Abstract

The application discloses a bone conduction loudspeaker, which comprises 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 element. The lower magnet is fixed on the bottom plate. The lower coil is annularly arranged on the inner side of the lower magnet. The upper magnet is fixed above the lower magnet. The lower magnet and the upper magnet are separated from each other, and a first magnetic gap is formed between the lower magnet and the upper magnet. The magnetic poles on the upper and lower sides of the first magnetic gap are opposite poles. The upper coil is annularly arranged on the inner side of the upper magnet, and 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 fixed above the upper magnet. The conduction element is movably arranged in the through hole, the root of the conduction element is fixedly connected to the vibrating plate, and the top of the conduction element penetrates through the centering support plate. The application further provides a composite loudspeaker, which comprises an air conduction loudspeaker and the bone conduction loudspeaker. The bone conduction loudspeaker is fixed on the air conduction loudspeaker.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of loudspeakers, and particularly relates to a bone conduction loudspeaker and a composite loudspeaker. BACKGROUND

[0002] The loudspeakers in the prior art are mainly divided into air conduction loudspeakers and bone conduction loudspeakers. The air conduction loudspeaker produces sound through the vibration of a diaphragm and conducts the sound to the human ear through air propagation. The bone conduction loudspeaker conducts sound through the principle of bone conduction. The air conduction loudspeaker has the advantages of high separation degree and high restoration degree of audio. Bone conduction is to use the carrier of the human skull, inner ear lymph, auditory nerve, etc. to transmit sound waves, so that the human ear can hear the sound. Using a bone conduction earphone, the ear can be opened and the damage to the eardrum can be reduced without plugging the ear, and the sound of the other party can be clearly heard even in a noisy situation.

[0003] The loudspeakers in the prior art are single air conduction loudspeakers or single bone conduction loudspeakers, and therefore cannot simultaneously have the advantages of both air conduction loudspeakers and bone conduction loudspeakers. SUMMARY

[0004] The present application belongs to the technical field of loudspeakers, and particularly relates to a bone conduction loudspeaker and a composite loudspeaker.

[0005] To achieve the above-mentioned purpose, the present application provides a bone conduction loudspeaker, which comprises a bottom plate; the bone conduction loudspeaker further comprises:

[0006] A lower magnet is fixedly arranged on the bottom plate;

[0007] A lower coil is annularly arranged on the inner side of the lower magnet;

[0008] An upper magnet is fixedly arranged above the lower magnet; the lower magnet and the upper magnet are spaced apart, and a first magnetic gap is formed between the lower magnet and the upper magnet, the two magnetic poles on the upper and lower sides of the first magnetic gap are opposite poles;

[0009] An upper coil is annularly arranged on the inner side of the upper magnet, and a through hole is formed in the upper coil;

[0010] A 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;

[0011] A centering support plate is fixedly arranged above the upper magnet; and

[0012] A conducting piece movably arranged in the through hole, a root of the conducting piece fixedly connected to the vibrating piece, and a top of the conducting piece passing through the centering support piece.

[0013] Preferably, the conducting piece comprises:

[0014] A conducting column movably arranged in the through hole, a root of the conducting column fixedly connected to the vibrating piece, and a top of the conducting column passing through the centering support piece; and

[0015] A conducting piece fixedly arranged at the top of the conducting column.

[0016] Preferably, the bone conduction speaker further comprises a first housing, and the lower magnet and the upper magnet are arranged in the first housing.

[0017] Preferably, the first housing has a top opening and a bottom opening arranged oppositely, a periphery of the bottom plate is fixedly connected to a periphery of the bottom opening, and a periphery of the centering support piece is fixedly connected to a periphery of the top opening.

[0018] Preferably, the bone conduction speaker further comprises a support piece, the centering support piece is fixedly arranged on the upper magnet, and a periphery of the centering support piece is fixedly connected to a top of the support piece.

[0019] Preferably, a bottom surface of the upper magnet is fixedly arranged with an upper gasket, a top surface of the lower magnet is fixedly arranged with a lower gasket, and a periphery of the vibrating piece is clamped between the upper gasket and the lower gasket.

[0020] Preferably, the vibrating piece is a metal vibrating piece or a metal composite vibrating piece, the centering support piece is a spring piece or an elastic support component, the bottom plate is a lower pole plate or a first PCB plate, a top surface of the upper magnet is fixedly arranged with a top plate, the top plate is an upper pole plate or a housing extension, and the housing extension is fixedly connected to an inner wall of the first housing.

[0021] Preferably, the upper magnet is annular or strip-shaped, the number of the strip-shaped upper magnets is at least two and the strip-shaped upper magnets are symmetrically arranged, the lower magnet is annular or strip-shaped, and the number of the strip-shaped lower magnets is at least two and the strip-shaped lower magnets are symmetrically arranged.

[0022] The application further provides a composite speaker, comprising:

[0023] An air conduction speaker, and

[0024] The bone conduction speaker is fixedly arranged on the air conduction speaker.

[0025] Preferably, the air conduction speaker has a second shell, a partition is arranged in the second shell, the partition divides an internal cavity of the second shell into a first cavity and a second cavity; the bone conduction speaker is arranged on the partition and in the first cavity; the conducting member extends from a top wall of the first cavity, and the top wall of the first cavity is provided with a sound guide hole.

[0026] The bone conduction speaker and the composite speaker provided by the embodiments of the present application have at least one of the following technical effects:

[0027] 1. When the bone conduction speaker works, the upper coil and the lower coil generate a magnetic field after being electrified, the vibration plate vibrates and drives the conducting member, so as to convert the electrical signal into an audio signal; compared with the moving coil type bone conduction speaker, the bone conduction speaker has smaller loss in the signal conversion process, especially for high-frequency audio signals, so the bone conduction speaker has the characteristics of good high-frequency performance;

[0028] 2. Since the moving coil type bone conduction speaker in the prior art needs more space in the sound generation process, and air participates in the vibration process, the bone conduction speaker cannot effectively control the sound leakage phenomenon; compared with the moving coil type bone conduction speaker in the prior art, the bone conduction speaker also has the advantages of small size, effectively reducing the area of the ear entry part and reducing the radiation of sound waves to air, thereby reducing sound leakage;

[0029] 3. The composite speaker combines the air conduction speaker and the bone conduction speaker, and when used, the two can be switched with each other, and the composite speaker has the advantages of both the air conduction speaker and the bone conduction speaker; and the air conduction speaker is a moving coil type speaker, which has excellent bass performance, and after being combined with the bone conduction speaker, the composite speaker can output full-band high-resolution audio. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0031] Figure 1 The structure schematic diagram of the bone conduction speaker provided by the embodiment 1 of the present application.

[0032] Figure 2 The structure schematic diagram of the bone conduction speaker provided by the embodiment 2 of the present application.

[0033] Figure 3 The structure schematic diagram of the composite speaker provided by the embodiment 3 of the present application.

[0034] Figure 4 A structure diagram of a composite loudspeaker provided for Embodiment 4 of the present application.

[0035] Figure 5 A structure diagram of a composite loudspeaker provided for Embodiment 5 of the present application.

[0036] Figure 6 A structure diagram of a composite loudspeaker provided for Embodiment 6 of the present application. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described in detail below with reference to the attached drawings, which show by way of example, embodiments in which the same or similar elements or elements having the same or similar functions are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the embodiments of the present application, and cannot be understood as limiting the present application.

[0038] Embodiment 1

[0039] A bone conduction loudspeaker 100 of the present embodiment includes a bottom plate 1112, a lower magnet 120, a lower coil 130, an upper magnet 140, an upper coil 150, a diaphragm 160, a centering support 190, and a conduction member 170. The lower magnet 120 is fixed to the bottom plate 1112. The lower coil 130 is annularly arranged on the inner side of the lower magnet 120. The upper magnet 140 is fixed above the lower magnet 120. The lower magnet 120 and the upper magnet 140 are spaced apart from each other to form a first magnetic gap 180 therebetween, and the two magnetic poles on the upper and lower sides of the first magnetic gap 180 are opposite poles. In the present embodiment, the two magnetic poles are an S-pole 141 of the upper magnet 140 and an N-pole 121 of the lower magnet 120, respectively. The upper coil 150 is annularly arranged on the inner side of the upper magnet 140, and a through hole is formed in the upper coil 150. The diaphragm 160 is suspended in the first magnetic gap 180, and the periphery thereof is fixed between the upper magnet 140 and the lower magnet 120. The centering support 190 is fixed above the upper magnet 140. The conduction member 170 is movably arranged in the through hole, and the root thereof is fixedly connected to the diaphragm 160, and the top thereof passes through the centering support 190.

[0040] When the bone conduction loudspeaker 100 is in operation, the upper coil 150 and the lower coil 130 generate a magnetic field after being energized, the diaphragm 160 vibrates and drives the conduction member 170, thereby converting an electrical signal into an audio signal. Compared with a dynamic bone conduction loudspeaker, the bone conduction loudspeaker 100 has less loss in the signal conversion process, especially for high-frequency audio signals, and thus has the characteristic of good high-frequency performance.

[0041] Because the moving coil type bone conduction speaker needs more space in the process of making sound, and air participates in the vibration process, it is unable to effectively control the leakage phenomenon. Therefore, compared with the moving coil type bone conduction speaker of the prior art, the bone conduction speaker 100 also has the advantages of small volume, effectively reducing the area of the ear-entering part, and reducing the leakage of air radiation sound waves.

[0042] The conduction piece 170 includes a conduction column 171 and a conduction sheet 172. The conduction column 171 is movably arranged in the through hole, the root of the conduction column 171 is fixedly connected to the vibration sheet 160, and the top of the conduction column 171 penetrates through the centering support sheet 190. The conduction sheet 172 is fixedly arranged at the top of the conduction column 171. In operation, the vibration generated by the vibration sheet 160 is conducted to the conduction sheet 172 through the conduction column 171, and the conduction sheet 172 conducts sound through the principle of bone conduction. In this conduction process, the signal loss is small.

[0043] The first shell 110 has a top opening and a bottom opening arranged oppositely, the periphery of the bottom plate 1112 is fixedly connected to the periphery of the bottom opening, and the periphery of the centering support sheet 190 is fixedly connected to the periphery of the top opening.

[0044] The bone conduction speaker 100 further includes a support piece 143, the centering support sheet 190 is fixedly arranged on the upper magnet 140, and the periphery of the centering support sheet 190 is fixedly connected to the top of the support piece 143.

[0045] The bottom surface of the upper magnet 140 is fixedly arranged with an upper gasket 161, the top surface of the lower magnet 120 is fixedly arranged with a lower gasket 162, and the periphery of the vibration sheet 160 is clamped between the upper gasket 161 and the lower gasket 162. The upper gasket 161 and the lower gasket 162 function to fix the vibration sheet 160 and make the vibration sheet 160 suspended.

[0046] The vibration sheet 160 is a metal vibration sheet or a metal composite vibration sheet. The centering support sheet 190 is a spring sheet, and the spring sheet is an electrically conductive spring sheet. The centering support sheet 190 also functions as an electrical connection, is made of a composite conductive material and has an electric circuit formed thereon, and a plurality of positive and negative electrode pads are arranged on the surface of the centering support sheet 190. The power supply lines of the lower coil 130 and the upper coil 150 are connected to the electrically conductive spring sheet, the electrically conductive spring sheet is connected to an external circuit, and the bone conduction speaker 100 has the advantage of simplified circuit structure.

[0047] The bottom plate 1112 is a lower pole plate. The top surface of the upper magnet 140 is fixedly arranged with a top plate 142. The top plate 142 is an upper pole plate. The upper magnet 140 is annular. The lower magnet 120 is annular.

[0048] Embodiment 2

[0049] Please refer toFigure 2 The difference between the embodiment and embodiment 1 is that the bone conduction speaker 100 further comprises a first housing 110, and the lower magnet 120 and the upper magnet 140 are accommodated in the first housing 110. The first housing 110 plays a supporting role. The centering support piece 190 is an elastic supporting component. The diaphragm 160 is a metal composite diaphragm, which is a plastic diaphragm with a metal plating layer on the surface and has the characteristics of light weight. The bottom plate 1112 is a first PCB plate. The power supply lines of the lower coil 130 and the upper coil 150 are connected to the first PCB plate, and the first PCB plate is connected with external circuits.

[0050] The top plate 142 is a housing extension. The housing extension is fixedly connected with the inner wall of the first housing 110.

[0051] The upper magnet 140, 140' is in the form of a strip. The number of the upper magnet 140, 140' in the form of a strip is two, and the two upper magnets 140, 140' are symmetrically arranged. The lower magnet 120, 120' is in the form of a strip. The number of the lower magnet 120, 120' in the form of a strip is two, and the two lower magnets 120, 120' are symmetrically arranged.

[0052] The rest of the embodiment is the same as embodiment 1. The features not explained in the embodiment are explained in embodiment 1, which will not be described here.

[0053] Embodiment 3

[0054] Please refer to Figure 2 and Figure 3 The embodiment provides a composite speaker, which comprises an air conduction speaker 200 and the bone conduction speaker 100 provided in embodiment 2. The bone conduction speaker 100 is fixedly arranged on the air conduction speaker 200.

[0055] The air conduction speaker 200 comprises a second housing 210, a magnetic unit 220a, a diaphragm 230 and a voice coil 240. The bone conduction speaker 100 is fixedly arranged 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 suspendedly arranged in the second housing 210, and the periphery of the diaphragm 230 is fixedly connected with the second housing 210. The voice coil 240 is fixedly connected with the diaphragm 230 and extends into the second magnetic gap 221.

[0056] When the air conduction speaker 200 works, the voice coil 240 is electrified to generate electromotive force and drive the diaphragm 230 to vibrate, thereby generating sound. The air conduction speaker 200 is a moving coil speaker, and has the characteristics of good low-frequency performance.

[0057] The magnetic unit 220a includes a first U-shaped iron 222a, a first magnet 223a, and a first amorphous metal core 224a. The side wall of the first U-shaped iron 222a is annularly provided with an extension 2221a extending outward, and the side wall of the first U-shaped iron 222a is fixedly connected with the second housing 210 through the extension 2221a. The periphery of the diaphragm 230 is fixedly connected with the first U-shaped iron 222a. The first magnet 223a is fixedly arranged on the first U-shaped iron 222a, and the second magnetic gap 221 is an annular gap formed by the side surface of the first magnet 223a and the side wall of the first U-shaped iron 222a. The first magnet 223a forms a magnetic field in the second magnetic gap 221.

[0058] The first amorphous metal core 224a is arranged on the top surface of the first magnet 223a. The first amorphous metal core 224a plays a role of magnetic conduction.

[0059] The top wall of the second housing 210 is provided with a fourth sound guide hole 211. The fourth sound guide hole 211 plays a role of guiding sound outward.

[0060] The composite speaker combines the air conduction speaker 200 and the bone conduction speaker 100, and when used, the two can be switched with each other, and simultaneously has the advantages of the air conduction speaker 200 and the bone conduction speaker 100. The air conduction speaker 200 is a moving coil speaker, has excellent bass performance, and after being combined with the bone conduction speaker 100, can output full-band high-resolution audio.

[0061] Embodiment 4

[0062] Please refer to Figure 4 The difference between the embodiment and embodiment 3 is that the magnetic unit 220b provided in the embodiment is provided with a first sound guide hole 22211 on the extension 2221b of the first U-shaped iron 222b, and a first sound adjusting net 22212 is arranged on the first sound guide hole 22211. The first sound adjusting net 22212 plays a role of sound adjusting. A diaphragm support 22213 is further fixedly arranged on the first sound guide hole 22211, and the periphery of the diaphragm 230 is further fixedly connected with the diaphragm support 22213. The diaphragm support 22213 plays a role of fixing and supporting the diaphragm 230.

[0063] A second sound guide hole 225 penetrates the bottom wall of the first U-shaped iron 222b, the first magnet 223b and the first pot core 224b in sequence, and specifically, the second sound guide hole 225 is also located below the middle part of the diaphragm 230, which can further enhance the low frequency effect. The second sound guide hole 225 is provided with a second sound tuning net 2251. The second sound tuning net 2251 plays a role of sound tuning.

[0064] The bottom surface of the first U-shaped iron 222b is provided with a second PCB board 2222, and the second sound guide hole 225 also penetrates the second PCB board 2222. The second PCB board 2222 plays a role of power supply. The power supply line of the bone conduction loudspeaker 100 and the voice coil 240 are both connected to the second PCB board 2222, and then electrically connected with external circuit.

[0065] The remaining part of the embodiment is the same as that of embodiment 3, and the features not explained in the embodiment are explained in embodiment 3, which will not be repeated here.

[0066] Embodiment 5

[0067] Please refer to Figure 5 The difference between the embodiment and embodiment 3 is that the magnetic unit 220c provided in the embodiment includes a second U-shaped iron 222c, a second magnet 223c, a second pot core 224c, a third magnet 226, a third pot core 227 and a third PCB board 228. The side wall of the second U-shaped iron 222c is fixedly connected with the second housing 210, and the periphery of the diaphragm 230 is fixedly connected with the second U-shaped iron 222c. The second magnet 223c is fixedly arranged on the second U-shaped iron 222c. The second pot core 224c is arranged on the top surface of the second magnet 223c. The third magnet 226 is annular, which is fixedly arranged on the second U-shaped iron 222c and outside the second magnet 223c, the second magnetic gap 221 is an annular gap formed by the outer side surface of the second magnet 223c and the inner annular 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 double-magnetic magnetic unit, which achieves the purpose of enhancing the magnetic field. The third pot core 227 is arranged on the top surface of the third magnet 226, and the third pot core 227 plays a role of magnetic conduction. The third PCB board 228 is fixedly arranged on the bottom surface of the second U-shaped iron 222c. The third PCB board 228 plays a role of power supply.

[0068] A third sound guide hole 229 penetrates the third PCB plate 228, the bottom wall of the second U-shaped iron 222c, the second magnet 223c and the second pot core 224c in sequence, and is located below the middle of the diaphragm 230, which can further reduce the frequency effect. The third sound guide hole 229 is provided with a third tuning net 2291. The third tuning net 2291 plays a role of tuning.

[0069] The remaining parts of the embodiment are the same as those of embodiment 3, and the features not explained in the embodiment are explained in embodiment 3, which will not be repeated here.

[0070] Embodiment 6

[0071] Please refer to Figure 6 The difference between the embodiment and embodiment 5 is that the second housing 210 is provided with a partition plate 212, the partition plate 212 divides the internal cavity of the second housing 210 into a first cavity 213 and a second cavity 214, the bone conduction loudspeaker 100 is accommodated on the partition plate 212 and in the first cavity 213, and the conduction piece 170 extends from the top wall of the first cavity 213, and the top wall of the first cavity 213 is provided with a fifth sound guide hole 2131.

[0072] The remaining parts of the embodiment are the same as those of embodiment 5, and the features not explained in the embodiment are explained in embodiment 5, which will not be repeated here.

[0073] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A composite loudspeaker, characterized in that: include: an air conduction speaker and a bone conduction speaker, wherein the bone conduction speaker is fixed on the air conduction speaker; The bone conduction speaker comprises a bottom plate; and A lower magnet, which is annular and fixed on the bottom plate; A lower coil, the lower coil being arranged on the inner side of the lower magnet; The upper magnet is annular and fixedly mounted above the lower magnet; an upper gasket is fixedly mounted on the bottom surface of the upper magnet, and a lower gasket is fixedly mounted on the top surface of the lower magnet, so that the lower magnet is separated from the upper magnet, and a first magnetic gap is formed therebetween, wherein the two magnetic poles on the upper and lower sides of the first magnetic gap are opposite poles; an upper coil, the upper coil being disposed on the inner side of the upper magnet and having a through hole formed therein; a vibrating plate, wherein a periphery of the vibrating plate is clamped between the upper gasket and the lower gasket so that the vibrating plate is suspended in the first magnetic gap; A centering support plate, the centering support plate is fixed above the upper magnet; as well as The conductive member includes a conductive post, the conductive post being movably disposed in the through hole, the base of the conductive post being fixedly connected to the vibration plate, the top of the conductive post passing through the centering support plate, and a conductive plate, the conductive plate being fixedly disposed on the top of the conductive post; The air conduction speaker includes a second shell, a magnetic unit, a diaphragm and a voice coil; the bone conduction speaker is fixed on the outer end surface of the top wall of the second shell, and a fourth sound guide hole is provided on the top wall of the second shell. The magnetic unit is accommodated in the second shell, and a second magnetic gap is formed in the magnetic unit; the diaphragm is suspended in the second shell, and its periphery is fixedly connected to the second shell; the voice coil is fixedly connected to the diaphragm and extends into the second magnetic gap.

2. The composite loudspeaker according to claim 1, wherein: The device further comprises a first housing, wherein the lower magnet and the upper magnet are accommodated in the first housing.

3. The composite loudspeaker according to claim 2, wherein: The first shell has a top opening and a bottom opening that are arranged opposite 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 support piece is fixedly connected to the periphery of the top opening.

4. The composite loudspeaker according to claim 1, wherein: It also includes a support member, which is fixed on the upper magnet, and the periphery of the centering support piece is fixedly connected to the top of the support member.

5. The composite loudspeaker according to any one of claims 2 to 3, characterized in that: The vibration plate is a metal vibration plate or a metal composite material vibration plate; the centering support plate is a spring or an elastic support component; the bottom plate is a lower pole plate or a first PCB board; a top plate is fixedly provided on the top surface of the upper magnet; the top plate is an upper pole plate or an outer shell extension, and the outer shell extension is fixedly connected to the inner wall of the first outer shell.

6. The composite loudspeaker according to claim 5, characterized in that The air conduction speaker has a second shell, and a partition is provided in the second shell, which divides the internal cavity of the second shell into a first cavity and a second cavity; the bone conduction speaker is accommodated on the partition and in the first cavity; the conductive member extends from the top wall of the first cavity, and a sound guide hole is provided on the top wall of the first cavity.

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