A shrapnel, a bone conduction speaker and a bone conduction ear-worn device

Abstract

The present invention discloses a shrapnel, which includes an inner ring body and connecting arms. The connecting arms are fixedly connected to the inner ring body and extend outward. Compared with the shrapnel in the prior art, this shrapnel does not have an outer ring, has a simpler structure, relatively smaller size, larger dynamic range, and longer stroke during vibration. Since the vibration stroke is related to the low-frequency performance, the longer the vibration stroke, the better the low-frequency performance. Therefore, this shrapnel has good bass performance. The invention also discloses a bone conduction loudspeaker, which has the above-mentioned shrapnel. The end of the connecting arm of the shrapnel is fixed on the magnetic unit through a support member or directly fixed to the magnetic unit, and the structure is further simplified. Therefore, this bone conduction loudspeaker has the characteristics of simple structure, easy assembly and repair, miniaturization and light weight. The invention also discloses a bone conduction ear-worn device, which has the above-mentioned bone conduction loudspeaker. This bone conduction ear-worn device has the advantage of miniaturization.

Description

Technical Field

[0001] The present invention belongs to the technical field of loudspeakers, and particularly relates to a shrapnel, a bone conduction loudspeaker and a bone conduction ear-worn device. Background Art

[0002] Bone conduction is a sound conduction method. A bone conduction loudspeaker converts an audio signal into mechanical vibrations of different frequencies, and transmits sound waves through a person's skull, bony labyrinth, inner ear lymph, spiral organ, auditory nerve, and auditory center. Compared with the classical sound conduction method of generating sound waves through a diaphragm, bone conduction omits many steps of sound wave transmission. Headphones using this sound wave transmission method, that is, bone conduction headphones, are very popular at present and have a wide range of applications.

[0003] Existing bone conduction loudspeakers usually have shrapnel. The shrapnel plays an elastic support role. Traditional shrapnel has inner and outer rings. This kind of shrapnel occupies a large space, resulting in a large volume of the bone conduction loudspeaker and cannot meet the requirement of miniaturization. Summary of the Invention

[0004] An object of the present invention is to provide a shrapnel, a bone conduction loudspeaker and a bone conduction ear-worn device, aiming to solve the technical problem that the shrapnel in the prior art occupies a large space, resulting in a large volume of the bone conduction loudspeaker.

[0005] To achieve the above object, a shrapnel provided by the present invention includes:

[0006] An inner ring body; and

[0007] A connecting arm, the connecting arm is fixedly connected to the inner ring body and extends outward.

[0008] Optionally, the number of the connecting arms is at least two, and at least two of the connecting arms are fixedly connected to the outer peripheral edge of the inner ring body.

[0009] Optionally, the connecting arm includes a connecting portion and a rotating arm portion; the connecting portion is fixedly arranged on the outer peripheral edge of the inner ring body and extends radially outward along the inner ring body; the rotating arm portion extends along the circumferential direction of the inner ring body, and one end of the rotating arm portion is fixedly connected to the end of the connecting portion.

[0010] Optionally, the connecting portion is in an arched or arc shape, and the arc-shaped connecting portion extends along the axial direction of the inner ring body;

[0011] Or the end of the rotating arm portion connected to the connecting portion is in an arc shape and extends along the axial direction of the inner ring body.

[0012] Optionally, the connecting arms are fixedly connected to the outer peripheral edge of the inner ring body in a radial or spiral shape.

[0013] The present invention also provides a bone conduction speaker, comprising:

[0014] A magnetic unit in which a magnetic gap is formed;

[0015] The bone conduction speaker further comprises:

[0016] The above-mentioned elastic sheet, the elastic sheet is suspended on the magnetic unit, and the connecting arm is fixed on the magnetic unit through a support member or directly fixed on the magnetic unit;

[0017] A voice coil, the voice coil is arranged on the lower surface of the elastic sheet and extends into the magnetic gap; and

[0018] [[ID=1,5]]A conduction member, the conduction member is arranged on the upper surface of the elastic sheet.

[0019] Optionally, the support member includes a plurality of support columns; the support columns are fixed on the magnetic unit;

[0020] Or the support member further includes a support ring, the support columns are fixed on the support ring, and the support ring is arranged on the magnetic unit.

[0021] Optionally, the support column includes a lower part of the support column and an upper part of the support column arranged on the top surface of the lower part of the support column; a through hole is provided at the end of the connecting arm, the upper part of the support column passes through the through hole, and the end of the connecting arm is limited on the top surface of the lower part of the support column.

[0022] Optionally, one end of the connecting arm is fixedly connected to the magnetic unit, and the other end extends upward and is fixedly connected to the inner ring body, and the inner ring body is suspended.

[0023] Optionally, the bone conduction speaker further comprises:

[0024] A housing, the magnetic unit and the elastic sheet are accommodated in the housing, and the conduction member extends out of the housing.

[0025] Optionally, the support member is accommodated in the housing, and the number thereof is two, one of the support members is arranged between the magnetic unit and the lower surface of the elastic sheet; the other support member is arranged between the housing and the upper surface of the elastic sheet.

[0026] The present invention also provides a bone conduction ear-worn device having the above-mentioned elastic sheet.

[0027] One or more of the above technical solutions in the elastic sheet, the bone conduction speaker and the bone conduction ear-worn device provided by the embodiments of the present invention at least have the following technical effects:

[0028] 1. The shrapnel includes an inner ring body and several connecting arms. Compared with the shrapnel in the prior art, this shrapnel does not have an outer ring, has a simpler structure, relatively smaller size, larger dynamic range, and longer stroke during vibration. Since the vibration stroke is related to the low-frequency performance, the longer the vibration stroke, the better the low-frequency performance. Therefore, this shrapnel has good bass performance.

[0029] 2. The bone conduction speaker has the above-mentioned shrapnel. Therefore, the bone conduction speaker has the characteristics of simple structure, easy disassembly and assembly, miniaturization, and light weight, and while achieving miniaturization, it broadens the low-frequency performance.

[0030] 3. The bone conduction ear-worn device includes a bone conduction headphone and a bone conduction hearing aid; the bone conduction ear-worn device with this shrapnel correspondingly has the advantages of miniaturization, portability, and comfortable wearing. In addition, new wearing methods can be realized, such as being placed in narrow spaces such as the ear canal and auricle. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1 It is a schematic structural diagram of the shrapnel provided in Embodiment 1 of the present invention.

[0033] Figure 2 It is a schematic structural diagram of the shrapnel provided in Embodiment 2 of the present invention.

[0034] Figure 3 It is a schematic structural diagram of the shrapnel provided in Embodiment 3 of the present invention.

[0035] Figure 4 It is a schematic structural diagram of the shrapnel provided in Embodiment 4 of the present invention.

[0036] Figure 5 It is a schematic structural diagram of the shrapnel provided in Embodiment 5 of the present invention.

[0037] Figure 6 It is a schematic structural diagram of the shrapnel provided in Embodiment 6 of the present invention.

[0038] Figure 7 It is a schematic structural diagram of the shrapnel provided in Embodiment 7 of the present invention.

[0039] Figure 8 It is a schematic structural diagram of the shrapnel provided in Embodiment 8 of the present invention.

[0040] Figure 9Schematic diagram of the elastic sheet provided in Embodiment 9 of the present invention.

[0041] Figure 10 Schematic diagram of the elastic sheet provided in Embodiment 10 of the present invention.

[0042] Figure 11 Schematic diagram of the elastic sheet provided in Embodiment 11 of the present invention.

[0043] Figure 12 Schematic diagram of the bone conduction speaker provided in Embodiment 12 of the present invention.

[0044] Figure 13 Schematic diagram of the bone conduction speaker provided in Embodiment 14 of the present invention.

[0045] Figure 14 Schematic diagram of the support member provided in Embodiment 14 of the present invention.

[0046] Figure 15 Is Figure 14 Cross-sectional view taken along line A-A shown in

[0047] Figure 16 Schematic diagram of the bone conduction speaker provided in Embodiment 16 of the present invention.

[0048] Figure 17 Schematic diagram of the bone conduction speaker provided in Embodiment 17 of the present invention.

[0049] Figure 18 Schematic diagram of the bone conduction speaker provided in Embodiment 18 of the present invention.

[0050] Figure 19 Schematic diagram of the bone conduction speaker provided in Embodiment 19 of the present invention. Detailed implementation manners

[0051] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the embodiments of the present invention and should not be construed as limiting the present invention.

[0052] Embodiment 1

[0053] As Figure 1As shown in the figure, a shrapnel 20a provided in this embodiment includes an inner ring body 21a and connecting arms 22a. The connecting arms 22a are fixedly connected to the inner ring body 21a and extend outward. Compared with the shrapnel in the prior art, the shrapnel 20a does not have an outer ring, has a simpler structure, relatively smaller size, larger dynamic range, and longer stroke during vibration. Since the vibration stroke is related to the low-frequency performance, the longer the vibration stroke, the better the low-frequency performance. Therefore, this shrapnel has good bass performance.

[0054] The number of the connecting arms 22a is three, and the three connecting arms 22a are fixedly connected to the outer peripheral edge of the inner ring body 21a.

[0055] The connecting arm 22a includes a connecting portion 221a and a rotating arm portion 222a. The connecting portion 221a is fixedly arranged on the outer peripheral edge of the inner ring body 21a and extends radially outward along the inner ring body 21a. The shape of the inner ring body 21a is circular, and the rotating arm portion 222a extends along the circumferential direction of the inner ring body 21a, and one end of it is fixedly connected to the end of the connecting portion 221a. The connecting arm 22a has the advantages of good support performance and good fixing effect.

[0056] Embodiment 2

[0057] The difference between this embodiment and Embodiment 1 is as follows: Please refer to Figure 2 , the shrapnel 20b provided in this embodiment includes an inner ring body 21b and a plurality of straight connecting arms 22b. The connecting arms 22b are fixedly connected to the outer peripheral edge of the inner ring body 21b in a radial manner. This shrapnel 20b has the characteristics of simple shape and easy processing.

[0058] The rest of this embodiment is the same as that of Embodiment 1. For the features not explained in this embodiment, the explanations of Embodiment 1 are adopted and will not be elaborated here.

[0059] Embodiment 3

[0060] The difference between this embodiment and Embodiment 1 is as follows: Please refer to Figure 3 , the shrapnel 20c provided in this embodiment includes an inner ring body 21c and a plurality of arc-shaped connecting arms 22c. The connecting arms 22c are fixedly connected to the outer peripheral edge of the inner ring body 21c in a rotating arm shape.

[0061] The rest of this embodiment is the same as that of Embodiment 1. For the features not explained in this embodiment, the explanations of Embodiment 1 are adopted and will not be elaborated here.

[0062] Embodiment 4

[0063] The difference between this embodiment and Embodiment 1 is as follows: Please refer to Figure 4, the shrapnel 20d provided in this embodiment includes a triangular inner ring body 21d and a plurality of arc-shaped connecting arms 22d. The connecting arms 22d are fixedly connected to the outer peripheral edge of the inner ring body 21d in a spiral arm shape.

[0064] The rest of this embodiment is the same as that of Embodiment 1. For the features not explained in this embodiment, the explanations of Embodiment 1 are adopted and will not be elaborated here.

[0065] Embodiment 5

[0066] The difference between this embodiment and Embodiment 1 is as follows: Please refer to Figure 5 , the shrapnel 20e provided in this embodiment includes a triangular inner ring body 21e and a plurality of straight strip-shaped connecting arms 22e. The connecting arms 22e are fixedly connected to the outer peripheral edge of the inner ring body 21e in a radial shape.

[0067] The rest of this embodiment is the same as that of Embodiment 1. For the features not explained in this embodiment, the explanations of Embodiment 1 are adopted and will not be elaborated here.

[0068] Embodiment 6

[0069] The difference between this embodiment and Embodiment 1 is as follows: Please refer to Figure 6 , the shrapnel 20f provided in this embodiment includes a square inner ring body 21f and a plurality of arc-shaped connecting arms 22f. The connecting arms 22f are fixedly connected to the outer peripheral edge of the inner ring body 21f in a spiral arm shape.

[0070] Embodiment 7

[0071] The difference between this embodiment and Embodiment 1 is as follows: Please refer to Figure 7 , for the shrapnel 20h provided in this embodiment, its connecting part 221h is in an arch shape. The connecting part in an arch shape has better stress performance and is not easily deformed.

[0072] Embodiment 8

[0073] The difference between this embodiment and Embodiment 1 is as follows: Please refer to Figure 8 , for the shrapnel 20i provided in this embodiment, its connecting part 221i is in an arc shape, and the arc-shaped connecting part 221i extends along the axial direction of the inner ring body 21i. The arc-shaped connecting part 221i can not only save lateral space and make the lateral dimension of the shrapnel 20i smaller, but also provide stress performance.

[0074] Embodiment 9

[0075] The difference between this embodiment and Embodiment 1 is as follows: Please refer to Figure 9, the elastic piece 20j provided in this embodiment has an arc-shaped end where the rotating arm portion 222j is connected to the connecting portion 221j, and the arc-shaped end extends along the axial direction of the inner ring body 21j. This rotating arm portion 222j can not only save lateral space, making the lateral dimension of the elastic piece 20j smaller, but also provide force-bearing performance.

[0076] Embodiment 10

[0077] The difference between this embodiment and Embodiment 1 is: Please refer to Figure 10 , the elastic piece 20k provided in this embodiment has a square outer periphery of its four connecting arms 22k.

[0078] Embodiment 11

[0079] The difference between this embodiment and Embodiment 1 is: Please refer to Figure 11 , the elastic piece 20l provided in this embodiment has a racetrack-shaped outer periphery of its four connecting arms 22l.

[0080] Embodiment 12

[0081] As Figure 12 shown, a bone conduction speaker provided in this embodiment includes a magnetic unit 10a, the elastic piece 20a provided in Embodiment 1, a support member 30, a voice coil 40, and a conduction member 50. A magnetic gap 13 is formed in the magnetic unit 10a. The elastic piece 20a is suspended above the magnetic unit 10a. The end of the connecting arm 22a is fixed to the magnetic unit 10a through the support member 30. The elastic piece 20a functions to support the voice coil 40 and the conduction member 50. The elastic piece 20a is a conductive elastic piece, which is made of a composite conductive material and has a circuit formed thereon, and positive and negative pads are also provided on its surface. The voice coil 40 is electrically connected to the conductive elastic piece, and the conductive elastic piece is then connected to an external circuit, eliminating the need to additionally design an electrical structure for supplying power to the voice coil 40, thus simplifying the structure.

[0082] The voice coil 40 is disposed on the lower surface of the elastic piece 20a and extends into the magnetic gap 13. The connection relationship between the voice coil 40 and the elastic piece 20a is a fixed connection. When the voice coil 40 is energized, it interacts with the magnetic field in the magnetic gap 13 to generate vibration.

[0083] The conduction member 50 is disposed on the upper surface of the elastic piece 20a. The connection relationship between the conduction member 50 and the elastic piece 20a is a fixed connection. The vibration generated by the voice coil 40 is conducted to the conduction member 50 through the elastic piece 20a. The conduction member 50 contacts the contact part of the human body and transmits audio through the principle of bone conduction.

[0084] The shrapnel 20a of the bone conduction speaker includes an inner ring body 21a and a plurality of connecting arms 22a. The ends of the connecting arms 22a of the shrapnel 20a are fixed on the magnetic unit 10a through a support member 30, and the fixing structure is more simplified. The bone conduction speaker has the above-mentioned shrapnel 20a, so the bone conduction speaker has the characteristics of simple structure, easy disassembly and assembly, miniaturization, small size and light weight. While realizing miniaturization, the low-frequency performance is broadened.

[0085] Please refer to Figure 1 and Figure 12 , the support member 30 includes a support column, and the support column is fixedly arranged on the magnetic unit 10a. Specifically, a hole is provided on the magnetic unit 10a, and the support column is fixedly installed in the hole by welding. The support member 30 has the advantage of simple structure, which is beneficial to reducing the product volume. A through hole 2221 is provided at the end of the connecting arm 22a, the support column 32 passes through the through hole 2221, and the connecting arm 22a is limited and fixed on the support member 30.

[0086] Please refer to Figure 12 , the magnetic unit 10a includes a U-shaped iron 11 and a first magnet 12. The function of the first magnet 12 is to generate a magnetic field. The function of the U-shaped iron 11 is to conduct magnetism and prevent magnetic leakage, and it can also be used as a supporting housing to further simplify the structure. The U-shaped iron 11 has a U-shaped iron bottom wall 111, and the peripheral edge of the U-shaped iron bottom wall 111 extends upward to form a U-shaped iron side wall 112. The first magnet 12 is a columnar magnet, one of its magnetic poles is fixed in the middle of the U-shaped iron bottom wall 111, and the other magnetic pole is provided with a first washer 121a. The function of the first washer 121a is to conduct magnetism. The magnetic gap 13 is an annular gap formed by the side surface of the first magnet 12 and the U-shaped iron side wall 112.

[0087] Please refer to Figure 12 , an installation groove 1123 is formed in the upper part of the U-shaped iron side wall 112, and the support member 30 is fixedly arranged in the installation groove 1123, which has the advantage of compact structure.

[0088] Embodiment 13

[0089] This embodiment provides a bone conduction ear-worn device, which has the bone conduction speaker provided in Embodiment 12. The bone conduction ear-worn device is a bone conduction headphone.

[0090] Embodiment 14

[0091] The difference between this embodiment and Embodiment 12 is:

[0092] Please refer to Figures 13 - 15, the bone conduction speaker provided in this embodiment further includes a housing 60. The magnetic unit 10b, the support member 30, and the elastic sheet 20 are accommodated in the housing 60, and the conduction sheet 50 extends out of the housing 60. The housing 60 serves to support and prevent magnetic leakage.

[0093] The support members 30, 30' are accommodated in the housing. The number of them is two. One of the support members 30 is disposed between the lower surface of the magnetic unit 10b and the elastic sheet 20. The other support member 30' is disposed between the upper surface of the housing 60 and the elastic sheet 20. The support member 30 includes a support ring 31 and three support columns 32. The support ring 31 is disposed on the magnetic unit 10a, and the support columns 32 are fixedly disposed on the support ring 31. Specifically, the connection relationship between the support column 32 and the support ring 31 is integrally formed. The two support members 30, 30' cooperate to suspend the elastic sheet 20.

[0094] The support column 32 includes a lower part 321 of the support column and an upper part 322 of the support column disposed on the top surface of the lower part 321 of the support column. The diameter of the upper part 322 of the support column is smaller than the diameter of the lower part 321 of the support column. Therefore, when the upper part 322 of the support column passes through the through hole 2221 at the end of the connecting arm 22a, the end of the connecting arm 22a is limited on the top surface of the lower part 321 of the support column and is suspended.

[0095] The magnetic unit 10b of the bone conduction speaker provided in this embodiment includes a first T-iron 14 and a second magnet 15. The first T-iron 14 includes a T-iron base 141 and a magnetic conduction column 142 fixedly disposed in the middle of the T-iron base 141. The first T-iron 14 serves to conduct magnetism and prevent magnetic leakage. The second magnet 15 is an annular magnet. One magnetic pole of it is fixedly disposed on the T-iron base 141, and a second washer 151 is disposed on the other magnetic pole of it. The second washer 151 serves to conduct magnetism. The magnetic gap 13 is an annular gap formed by the inner peripheral surface of the second magnet 15 and the side surface of the magnetic conduction column 142.

[0096] The rest of this embodiment is the same as that of Embodiment 12. For the features not explained in this embodiment, the explanations of Embodiment 12 are adopted and will not be elaborated here.

[0097] Embodiment 15

[0098] This embodiment provides a bone conduction ear-worn device having the bone conduction speaker provided in Embodiment 14. This bone conduction ear-worn device is a bone conduction hearing aid.

[0099] Embodiment 16

[0100] The difference between this embodiment and Embodiment 14 is as follows:

[0101] Please refer to Figure 16 , the magnetic unit 10c of the bone conduction speaker provided in this embodiment includes a third magnet 16, a fourth magnet 17, and a lower pole plate 18. Specifically, the magnetic unit 10c adopts a double-magnet structure and has the advantage of strong magnetic field intensity. The third magnet 16 is a cylindrical magnet, one of its magnetic poles is fixed on the lower pole plate 18, and a third washer 161 is provided on the other magnetic pole. The lower pole plate 18 plays a role in preventing magnetic leakage, and the third washer 161 plays a role in guiding magnetic flux. The fourth magnet 17 is an annular magnet, one of its magnetic poles is fixed on the lower pole plate 18, and a fourth washer 171 is provided on the other magnetic pole. The fourth washer 171 plays a role in guiding magnetic flux. The magnetic gap 13 is an annular gap formed by enclosing the side surface of the third magnet 16 and the inner peripheral surface of the fourth magnet 17.

[0102] The rest of this embodiment is the same as that of Embodiment 14. For the features not explained in this embodiment, the explanations of Embodiment 14 are adopted and will not be elaborated here.

[0103] Embodiment 17

[0104] The difference between this embodiment and Embodiment 14 is that:

[0105] Please refer to Figure 17 , the bone conduction speaker provided in this embodiment includes a magnetic unit 10b, a diaphragm 20g, a voice coil 40, a conduction member 50, and a housing 60. The diaphragm 20g is suspended on the magnetic unit 10b and includes an inner ring body 21g and a plurality of connecting arms 22g. The connecting arms 22g are fixedly connected to the inner ring body 21g and extend outward, and the ends of the connecting arms 22g are directly fixed on the magnetic unit 10b. Since the connecting arms 22g are directly fixed on the magnetic unit 10b, this bone conduction speaker does not require a support member, has a simpler structure, a smaller volume, a lighter weight, and a lower material cost.

[0106] One end of the connecting arm 22g is fixedly connected to the magnetic unit 10b, and the other end extends upward and is fixedly connected to the periphery of the inner ring body 21g, and the inner ring body 21g is suspended. Specifically, the ends of the connecting arms 22g are fixed between the housing 60 and the second washer 151 by welding.

[0107] The rest of this embodiment is the same as that of Embodiment 14. For the features not explained in this embodiment, the explanations of Embodiment 14 are adopted and will not be elaborated here.

[0108] Embodiment 18

[0109] Refer to Figure 18, the difference between this embodiment and Embodiment 12 is that: the bone conduction speaker provided in this embodiment includes a magnetic unit 10d, a lower elastic sheet 20h, an upper elastic sheet 20i, a voice coil 40, a conduction member 50 and a housing 60. The magnetic unit 10d includes a second T-iron and a second magnet disposed on the second T-iron. The bottom of the T-iron is connected to the lower elastic sheet 20h, and the periphery of the lower elastic sheet 20h is fixedly connected to the edge of the bottom opening of the housing 60. The voice coil 40 is disposed around the periphery of the second magnet, and its top is fixedly connected to the bottom surface of the upper elastic sheet 20i. The periphery of the upper elastic sheet 20i is fixedly connected to the edge of the top opening of the housing 60 through a support column 70. The conduction member 50 is disposed on the top surface of the upper elastic sheet 20i. This bone conduction speaker is of the internal magnetic moving iron type.

[0110] Embodiment 19

[0111] Refer to Figure 19 , the difference between this embodiment and Embodiment 18 is that: the voice coil 40 provided in this embodiment is fixedly connected to the upper elastic sheet 20i through a connecting column 41. The connecting column 41 passes through the upper elastic sheet 20i, and the conduction member 50 is fixedly disposed on the connecting column 41. The connecting column 41 functions to connect various components and conduct electricity, simplifying the circuit structure. A through hole 19 is provided in the middle of the magnetic unit 10e.

[0112] The remaining parts of this embodiment are the same as those of Embodiment 18. For the features not explained in this embodiment, the explanations of Embodiment 18 are adopted and will not be elaborated here.

[0113] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A shrapnel, characterized in that, It includes an inner ring body; and a connecting arm fixedly connected to the inner ring body and extending outward. The connecting arm includes a connecting portion and a rotating arm portion. The connecting portion is fixedly provided on the outer peripheral edge of the inner ring body and extends radially outward along the inner ring body. The rotating arm portion extends circumferentially along the inner ring body, and one end thereof is fixedly connected to the end of the connecting portion. The connecting portion is in an arch shape or an arc shape, and the arc-shaped connecting portion extends along the axial direction of the inner ring body; or the end of the rotating arm portion connected to the connecting portion is in an arc shape and extends along the axial direction of the inner ring body. The connecting arm is fixedly connected to the outer peripheral edge of the inner ring body in a radial or rotating arm shape.

2. The shrapnel according to claim 1, wherein The number of the connecting arms is at least two, and at least two connecting arms are fixedly connected to the outer peripheral edge of the inner ring body.

3. A bone conduction loudspeaker, comprising: A magnetic unit in which a magnetic gap is formed; Characterized in that it further includes: The shrapnel as claimed in claim 1 or 2, the shrapnel is suspended on the magnetic unit, and the connecting arm is fixed on the magnetic unit through a support member or directly fixedly provided on the magnetic unit; A voice coil disposed on the lower surface of the shrapnel and extending into the magnetic gap; and a conduction member disposed on the upper surface of the shrapnel.

4. The bone conduction speaker according to claim 3, characterized in that, The support member includes a plurality of support columns; the support columns are fixedly provided on the magnetic unit; Or the support member further includes a support ring, the support columns are fixedly provided on the support ring, and the support ring is disposed on the magnetic unit.

5. The bone conduction speaker according to claim 4, wherein The support column includes a lower part of the support column and an upper part of the support column provided on the top surface of the lower part of the support column. A through hole is provided at the end of the connecting arm, the upper part of the support column passes through the through hole, and the end of the connecting arm is limited on the top surface of the lower part of the support column.

6. The bone conduction speaker according to claim 3, wherein One end of the connecting arm is fixedly connected to the magnetic unit, and the other end extends upward and is fixedly connected to the inner ring body, and the inner ring body is suspended.

7. The bone conduction speaker according to claim 3, wherein It further includes: A housing, the magnetic unit and the shrapnel are accommodated in the housing, and the conduction member extends out of the housing.

8. The bone conduction speaker according to claim 7, wherein The support member is accommodated in the housing, and the number thereof is two. One of the support members is disposed between the magnetic unit and the lower surface of the shrapnel; the other support member is disposed between the housing and the upper surface of the shrapnel.

9. Bone conduction ear-worn device, characterized in that, Having the shrapnel as claimed in claim 1 or 2.

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