CN113596655A

CN113596655A - Elastic sheet and bone conduction sound production device

Info

Publication number: CN113596655A
Application number: CN202110802835.9A
Authority: CN
Inventors: 赵玉洗; 曹洪斌
Original assignee: Suzhou Suoye Electronic Technology Co ltd
Current assignee: Suzhou Suoye Electronic Technology Co ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2021-11-02

Abstract

The invention discloses an elastic sheet and a bone conduction sound production device, wherein the elastic sheet comprises an external component, an internal component and a plurality of connecting components connected between the external component and the internal component, the minimum width of the connecting components is not less than the wall thickness of the connecting components, the minimum length of the connecting components is not less than 2 times of the distance between the external component and the internal component, the resonance frequency point F0 of the elastic sheet is effectively reduced, and the optimal low-frequency effect is achieved. The bone conduction sound production device with the elastic sheet is applied, the whole sound frequency section is balanced, a good acoustic effect is achieved, and user experience and product sound quality are remarkably improved.

Description

Elastic sheet and bone conduction sound production device

Technical Field

The invention relates to the technical field of bone conduction sounding, in particular to a spring plate and a bone conduction sounding device.

Background

Bone conduction is a sound conduction mode, that is, sound is converted into mechanical vibration with different frequencies, and sound waves are transmitted through the skull, the bone labyrinth, the lymph fluid of the inner ear, the spiral organ and the auditory center of a human body. Compared with the traditional sound conduction mode of generating sound waves through a sound film, the bone conduction mode omits a plurality of sound wave transmission steps, can realize clear sound restoration in a noisy environment, and does not influence other people due to the fact that the sound waves are diffused in the air.

The earphone manufactured by applying the bone conduction sounding technology is called as follows: bone conduction earphone, the conduction of its sound wave is different with ordinary pleasant formula, does not need the vibration of eardrum, but directly passes to auditory nerve through the bone, has both improved the travelling comfort, has protected user's hearing again, can also make the user directly hear external sound clearly, has its unique superiority, but current bone conduction earphone has following defect:

when the bone conduction sound production device applied to the existing bone conduction earphone conducts low-frequency signals, the resonance frequency point F0 of the existing elastic sheet is higher, so that the low-frequency part heard by the ear during earphone playing sinks insufficiently, the sound reduction degree is poor, large vibration amplitude is generated, and the bone conduction sound production device has strong vibration sense during use and influences customer experience. In order to overcome the defects, in practical application, the earphone directly shields the low-frequency signal, so that although vibration sense is relieved, the sound transmitted to the ear lacks a bass part, the sound quality is not high, and the experience sense of a client is also influenced. Therefore, it is significant to research a spring plate applied to a bone conduction sound production device, which has a lower resonance frequency point F0 and improves the low-frequency effect.

Disclosure of Invention

The invention aims to provide a spring plate and a bone conduction sound production device, which can effectively reduce the resonance frequency point F0 of the spring plate and achieve the optimal low-frequency effect.

In order to solve the above technical problem, in one aspect, the present invention provides a spring plate, including an outer member, an inner member, and a plurality of connecting members connected between the outer member and the inner member, wherein a minimum width of the connecting members is not less than a wall thickness of the connecting members, and a minimum length of the connecting members is not less than 2 times a distance between the outer member and the inner member.

Preferably, one end of the connecting component is connected to the outer component to form a first connecting point, the other end of the connecting component is connected to the inner component to form a second connecting point, a first reference line is formed between the geometric center of the inner component and the first connecting point, a second reference line is formed between the geometric center and the second connecting point, and an included angle between the first reference line and the second reference line is not greater than 60 °.

Preferably, the connection assembly is configured to be of equal or unequal wall thickness.

Preferably, the connecting assembly comprises a first end connected with the outer assembly, a second end connected with the inner assembly, and a connecting arc part connected between the first end and the second end; the wall thickness of the connecting arc part is equal to the wall thickness of the first end part and the second end part; or,

the wall thickness of the connecting arc portion is smaller than the wall thickness of the first end portion and the second end portion.

Preferably, the wall thickness of the connecting arc portion is any value between 0.05mm and 0.5 mm.

Preferably, the connecting arc has a wall thickness of 0.05mm, 0.1mm, 0.12mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm or 0.5 mm.

Preferably, the connection assembly is configured in a flat shape or an undulating shape.

Preferably, the first end portion and the second end portion are disposed on the same horizontal plane, and the connecting arc portion is disposed in an undulating shape; or,

the first end portion and the second end portion are arranged at positions shifted from each other in the horizontal direction, and the connecting arc portion is arranged in an undulating shape.

Preferably, the outer component and the inner component are arranged on the same horizontal plane; or,

the outer unit and the inner unit are arranged at positions shifted from each other in the horizontal direction.

Preferably, the inner member is configured to have an undulating shape in a horizontal direction.

Preferably, the young's modulus of the material of which the spring plate is made is any value between 120Gpa and 300 Gpa.

Preferably, the young's modulus of the material of which the spring plate is made is 120Gpa, 140Gpa, 160Gpa, 180Gpa, 190Gpa, 200Gpa, 220Gpa, 240Gpa, 260Gpa, 280Gpa, 300 Gpa.

Preferably, the outer and inner components are configured in a racetrack or quadrilateral or circular shape; or,

the inner component is configured to be in a track shape, the outer component is configured to be in a strip shape, and the outer components are arranged on two sides of the inner component in parallel.

Preferably, the outer component is provided with one or more positioning grooves and/or positioning holes.

On the other hand, the invention also provides a bone conduction sound production device which comprises the elastic sheet.

Compared with the prior art, the invention has the following advantages:

according to the elastic sheet, the wall thickness, the length and the width of the connecting assembly are limited, so that the effective vibration area of the elastic sheet is limited, the minimum width of the connecting assembly is limited to be not smaller than the wall thickness of the connecting assembly, the minimum length of the connecting assembly is limited to be not smaller than 2 times of the distance between the external assembly and the internal assembly, the resonance frequency point F0 of the elastic sheet is effectively reduced, and the optimal low-frequency effect is achieved;

in a preferred embodiment, the Young modulus of the material for making the elastic sheet is limited to be any value between 120Gpa and 300Gpa, so that the resonance frequency point F0 of the elastic sheet is lowered, and the optimal low-frequency effect is further achieved;

in a preferred embodiment, the connecting component is configured with unequal wall thickness, so that the stability of the elastic sheet is considered while the optimal low-frequency effect is pursued.

In a preferred embodiment, the outer assembly and the inner assembly are arranged at the positions staggered with each other in the horizontal direction, so that the framework stack of the elastic sheet and the exciter in the Z-axis direction can be adjusted during subsequent assembly, and a vibration space is provided;

the bone conduction sound production device with the elastic sheet can transmit sound signals with moderate amplitude, simultaneously can synchronously transmit the bass part to the auditory canal, balances the whole sound frequency section, achieves better acoustic effect, and obviously improves user experience and product sound quality.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case. In the drawings:

FIG. 1 is a schematic perspective view of a spring plate according to the present invention;

FIG. 2 is a schematic plan view of a spring plate according to the present invention;

FIG. 3 is a graph showing the variation of the resonant frequency F0 of the connecting member of the present invention at different wall thicknesses;

FIG. 4 is a graph showing the variation of the resonant frequency F0 of the connecting member and the hollow area at different ratios according to the present invention;

FIG. 5 is a variation curve of the resonant frequency F0 of the elastic sheet material under different Young's moduli;

FIG. 6 is a schematic structural view of a spring plate with positioning holes according to the present invention;

FIG. 7 is a schematic perspective view of a spring plate according to a first embodiment of the present invention;

FIG. 8 is an enlarged view of portion A of FIG. 7;

FIG. 9 is a schematic perspective view of a resilient plate according to a second embodiment of the present invention;

FIG. 10 is a schematic perspective view of an elastic sheet according to a second embodiment of the present invention;

FIG. 11 is a schematic perspective view of a resilient plate according to a third embodiment of the present invention;

fig. 12 is a schematic perspective view of a resilient plate according to a fourth embodiment of the present invention;

FIG. 13 is a schematic view of another structure of a resilient piece according to a fourth embodiment of the present invention;

FIG. 14 is a schematic perspective view of a spring plate according to a fifth embodiment of the present invention;

fig. 15 is a schematic perspective view of a resilient plate according to a sixth embodiment of the present invention;

fig. 16 is a schematic perspective view of an elastic sheet according to a sixth embodiment of the invention;

fig. 17 is a schematic perspective view of a spring plate according to a seventh embodiment of the invention.

Shown in the figure:

1. an external component; 11. positioning a groove; 2. an internal component; 21. an upper convex portion; 22. a lower recess; 3. a connecting assembly; 31. a first end portion; 32. a second end portion; 33. a connecting arc part; a. a first connection point; b. a second connection point; o, geometric center; l1, first reference line; l2, second reference line.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, the elastic sheet of the present invention, applied to a bone conduction sound-generating device, includes an outer member 1, an inner member 2, and a plurality of connecting members 3 connected between the outer member 1 and the inner member 2. The number of the connecting assemblies 3 is preferably 4, and the connecting assemblies are uniformly or symmetrically distributed between the outer assembly 1 and the inner assembly 2, so that the connection of the inner assembly and the outer assembly is more stable on one hand; on the other hand, the inner and outer components are not easy to generate abnormal deflection during vibration, the elastic sheet has stronger reliability, and the normal work of the bone conduction sounding device is ensured.

Preferably, the outer member 1 and the inner member 2 are disposed on the same horizontal plane, and the distance between the hollowed regions formed between the outer member 1 and the inner member 2 is set to be equal, but the distance between the hollowed regions is not limited thereto, and may also be set to be unequal, after the size of the inner member 2 and the outer member 1 is determined, the size of the distance between the hollowed regions is also determined, and the effective vibration area of the elastic piece is changed by controlling the wall thickness, the length and the width of the connecting member 3, so as to change the resonance frequency point F0 of the elastic piece, thereby achieving the optimal low-frequency effect.

In the preferred embodiment, the minimum width of the connecting member 3 is not less than the wall thickness of the connecting member, and the minimum length of the connecting member 3 is not less than 2 times the spacing between the outer member 1 and the inner member 2, it being understood that the connecting member 3 is always disposed within the hollowed area formed between the outer member 1 and the inner member 2, and therefore the maximum width of the connecting member 3 is not greater than the spacing of the hollowed area.

The resonant frequency point F0 of the spring plate is related to the wall thickness, length and width of the connecting member 3. The connecting assembly 3 is configured to have a uniform wall thickness, the connecting assembly 3 includes a first end portion 31 connected to the outer assembly 1, a second end portion 32 connected to the inner assembly 2, and a connecting arc portion 33 connected between the first end portion 31 and the second end portion 32, the wall thickness of the first end portion 31, the second end portion 32, and the connecting arc portion 33 is uniform, and the wall thickness of the connecting assembly 3 is preferably any value between 0.05mm and 0.5 mm. In particular, the wall thickness may be 0.05mm, 0.1mm, 0.12mm, 0.15mm, 0.2mm, 0.25mm or 0.3mm, 0.35mm, 0.4mm or 0.5 mm. The minimum width of the connecting assembly 3, which is defined by the wall thickness of the connecting assembly 3, is not less than the wall thickness of the connecting assembly, preferably the minimum width may be 2, 3 or 4 times the wall thickness. As shown in fig. 3, the wall thickness of the connecting member and the resonant frequency point F0 of the spring plate are substantially linear, and when the wall thickness of the connecting member is gradually reduced between 0.05mm and 0.5mm, especially between 0.05mm and 0.3mm, the corresponding resonant frequency point F0 of the spring plate is also gradually reduced. Further, the minimum length of the connecting assembly 3 is defined by the distance between the hollowed areas formed between the outer assembly 1 and the inner assembly 2, and the minimum length is not less than 2 times of the distance, and preferably can be 2 times, 4 times, 5 times, 6 times, 8 times … … times of the distance (within a reasonable range, the larger the multiple, the better). As shown in fig. 4, when the ratio multiple of the length of the connection component to the distance of the hollow area is gradually increased, the resonance frequency point F0 of the corresponding elastic piece is gradually decreased. When the wall thickness, the length and the width of the connecting component 3 are controlled in the relation, the resonance frequency point F0 of the elastic sheet is effectively reduced, and the optimal low-frequency effect is achieved.

Preferably, the connecting member 3 has various designs, and may be configured in a flat shape or an undulating shape. Relief shapes include, but are not limited to: the first end 31 and the second end 32 are arranged on the same horizontal plane, and the connecting arc 33 is arranged in an undulating shape; alternatively, the first end portion 31 and the second end portion 32 are arranged at positions shifted from each other in the horizontal direction, and the connecting arc portion 33 is arranged in an undulating shape.

In order to further lower the resonant frequency point F0 of the elastic sheet, the material of the elastic sheet may be a metal material, or may be other single or composite materials that can achieve the same performance, as long as the young modulus of the material is any value between 120Gpa and 300 Gpa. Specifically, the young's modulus is 120Gpa, 140Gpa, 160Gpa, 180Gpa, 190Gpa, 200Gpa, 220Gpa, 240Gpa, 260Gpa, 280Gpa, or 300 Gpa. As shown in fig. 5, when the young's modulus of the material of the elastic sheet is gradually decreased between 120Gpa and 300Gpa, the resonant frequency point F0 of the corresponding elastic sheet is also gradually decreased. Therefore, the material for making the elastic sheet can also affect the resonant frequency point F0 of the elastic sheet, and when the Young modulus of the material is between 120Gpa and 300Gpa, the resonant frequency point F0 of the elastic sheet is effectively reduced, and the optimal low-frequency effect is achieved.

As shown in fig. 2, as a more preferred embodiment, the connection member 3 is connected to the outer member 1 at one end to form a first connection point a, the connection member 3 is connected to the inner member 2 at the other end to form a second connection point b, a first reference line L1 is formed between the geometric center o of the inner member 2 and the first connection point a, a second reference line L2 is formed between the geometric center o and the second connection point b, and an included angle θ between the first reference line L1 and the second reference line L2 is less than 60 °. So set up coupling assembling 3 that arranges that can be more reasonable, optimize shell fragment structural strength and length, improve the shell fragment reliability.

The outer member 1 and the inner member 2 are each configured in a racetrack shape or a quadrilateral shape or a circular shape. The outer assembly 1 is in a track-shaped ring shape or a quadrilateral ring shape or a circle shape, and the inner assembly 2 is positioned in the center of the outer assembly 1, and can be in a track shape or a quadrilateral shape or a circle shape with a hole at the center, or in a track shape or a quadrilateral shape or a circle shape without a hole at the center. In order to enable the elastic sheet to be convenient for accurate positioning during subsequent assembly with the bone conduction sound generating device, one or more positioning grooves 11 (shown in figure 1) can be formed in the outer assembly 1 along the circumferential direction of the inner ring, one or more positioning holes 12 (shown in figure 6) can be formed in the body of the outer assembly 1 while the positioning grooves 11 are formed, multi-directional positioning is achieved, and accuracy is improved.

The first embodiment is as follows:

as shown in fig. 7 and 8, the connecting assembly 3 in this embodiment is configured with different wall thicknesses, and the structure of the rest parts is unchanged, corresponding to the spring plate of the first preferred embodiment of the present invention.

Specifically, the wall thickness of the connecting arc 33 is smaller than the wall thickness of the first end portion 31 and the second end portion 32. The wall thickness of the connecting arc 33 is preferably any value between 0.05mm and 0.5 mm. In particular, the wall thickness may be 0.05mm, 0.1mm, 0.12mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm or 0.5 mm. Since the first end 31 and the second end 32 need to be connected to the outer member 1 and the inner member 2, respectively, a certain wall thickness support is required to improve the stability of the connection. The connecting arc portion 33 is an effective vibration portion of the whole spring plate, and the wall thickness of the connecting arc portion can be flexibly changed to adjust the resonance frequency point F0 of the whole spring plate.

The connecting component 3 with the structure is configured to have different wall thicknesses, so that the stability of the elastic sheet is considered while the optimal low-frequency effect is pursued.

Example two:

as shown in fig. 9, in the elastic sheet corresponding to the second preferred embodiment of the present invention, in the present embodiment, the external component 1 and the internal component 2 are arranged at positions staggered from each other in the horizontal direction, and the structure of the rest components is not changed.

Specifically, in the present embodiment, the connecting member 3 is configured in an undulating shape. The first end portion 31 and the second end portion 32 may be disposed at positions shifted from each other in the horizontal direction, and connected by the undulation of the connecting arc portion 33, and the undulation shape may be, as shown in fig. 9, realized by directly bending a partial region of the connecting arc portion 33; as shown in fig. 10, the connection arc portion 33 may be gradually curved as a whole. The connecting component 3 can also be directly arranged in an inclined way, and two ends of the connecting component are respectively connected with the outer component 1 and the inner component 2 which are mutually staggered in the horizontal direction.

When the elastic sheet of the structure is assembled subsequently, the outer assembly 1 is connected to the packaging structure, the inner assembly 2 is connected to the exciter, the elastic sheet and the exciter can be adjusted through the connecting assembly 3 to be stacked on the framework of the Z-axis direction, and the vibration space is provided without the assistance of other assemblies.

Example three:

as shown in fig. 11, in the present embodiment, the outer unit 1 and the inner unit 2 are still arranged at positions shifted from each other in the horizontal direction, but unlike the second embodiment, the connection unit 3 is not arranged in the undulating shape in the present embodiment, but the inner unit 2 is arranged in the undulating shape in the horizontal direction, and the remaining component structures are not changed.

Specifically, the inner assembly 2 is "concave", the outer assembly 1, the connecting assembly 3 and two upper protrusions 21 of the inner assembly 2 are disposed on the same horizontal plane, the connecting assembly 3 is connected to the upper protrusions 21 of the inner assembly 2, and the lower concave portion 22 of the inner assembly 2 is disposed lower than the upper protrusions 21.

The elastic sheet of the structure is connected to the packaging structure during subsequent assembly, the lower concave part 22 of the inner component 2 is connected to the exciter, and the elastic sheet and the framework of the exciter in the Z-axis direction can be adjusted to be stacked through partial concave of the inner component 2, so that the vibration space is provided without the assistance of other components.

Example four:

as shown in fig. 12, the spring plate corresponding to the fourth preferred embodiment of the present invention, in this embodiment, the inner member 2 is configured in a racetrack shape or a quadrilateral shape or a circular shape, which may be a track-shaped or quadrangular or circular shape with a central opening, or a track-shaped or quadrangular or circular shape without a central opening, the outer member 1 is no longer track-shaped or quadrangular or circular but is configured in a strip shape, the outer member 1 is disposed in parallel on both sides of the inner member 2, the function of the spring plate is ensured, the quality and the cost of the spring plate are reduced, one side of the external component 1 close to the internal component 2 is provided with one or more positioning grooves 11 (as shown in figure 12), and at the same time of the positioning grooves 11, one or more positioning holes 12 (as shown in fig. 13) are formed in the body of the external component 1, so that multi-directional positioning is realized, and the accuracy is improved. The rest parts have unchanged structure.

Example five:

as shown in fig. 14, unlike the fourth embodiment, the connecting assembly 3 is configured to have different wall thicknesses in the present embodiment, and the structure of the remaining components is not changed.

Example six:

as shown in fig. 15, unlike the fourth embodiment, in the present embodiment, the external module 1 and the internal module 2 are arranged at positions shifted from each other in the horizontal direction, and the remaining component structures are not changed.

Specifically, in the present embodiment, the connecting member 3 is configured in an undulating shape. The first end portion 31 and the second end portion 32 may be disposed at positions shifted from each other in the horizontal direction, and connected by the undulation of the connecting arc portion 33, and the undulation shape may be, as shown in fig. 15, realized by directly bending a partial region of the connecting arc portion 33; as shown in fig. 16, the connection arc portion 33 may be gradually curved as a whole. The connecting component 3 can also be directly arranged in an inclined way, and two ends of the connecting component are respectively connected with the outer component 1 and the inner component 2 which are mutually staggered in the horizontal direction.

Example seven:

as shown in fig. 17, in the present embodiment, the outer unit 1 and the inner unit 2 are still arranged at positions shifted from each other in the horizontal direction, and unlike the sixth embodiment, the connection unit 3 is not arranged in the undulating shape in the present embodiment, but the inner unit 2 is arranged in the undulating shape in the horizontal direction, and the remaining component structures are not changed.

Example eight:

the embodiment provides a bone conduction sound generating mechanism, and it includes foretell shell fragment to the sound signal amplitude that makes sound generating mechanism transmit is moderate, and the bass part can be transferred to the duct in step simultaneously, and balanced whole sound audio frequency section reaches better acoustic effect, shows to promote user experience and product tone quality.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided would be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego such subject matter, nor should the applicant consider that such subject matter is not considered part of the disclosed subject matter.

Claims

1. A shrapnel which is characterized by comprising an outer component, an inner component and a plurality of connecting components connected between the outer component and the inner component, wherein the minimum width of the connecting components is not less than the wall thickness of the connecting components, and the minimum length of the connecting components is not less than 2 times of the space between the outer component and the inner component.

2. An elastic piece according to claim 1, wherein one end of the connecting component is connected to the outer component to form a first connecting point, the other end of the connecting component is connected to the inner component to form a second connecting point, a first reference line is formed between the geometric center of the inner component and the first connecting point, a second reference line is formed between the geometric center of the inner component and the second connecting point, and an included angle between the first reference line and the second reference line is not more than 60 °.

3. A shrapnel according to claim 1, wherein the connection assembly is configured to be of uniform or non-uniform wall thickness.

4. A shrapnel according to claim 3, wherein the connecting assembly comprises a first end connected with the outer assembly, a second end connected with the inner assembly and a connecting arc connected between the first end and the second end; the wall thickness of the connecting arc part is equal to the wall thickness of the first end part and the second end part; or,

5. A clip according to claim 4, wherein the wall thickness of the connecting arc is anywhere between 0.05mm and 0.5 mm.

6. A clip according to claim 5, wherein the wall thickness of the connecting arc is 0.05mm, 0.1mm, 0.12mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm or 0.5 mm.

7. A shrapnel according to claim 4, wherein said connection assembly is configured in a flat shape or an undulating shape.

8. The shrapnel of claim 7, wherein the first end portion and the second end portion are arranged on the same horizontal plane, and the connecting arc portion is arranged in an undulating shape; or,

9. A shrapnel according to any of claims 1 to 8, characterized in that the outer component and the inner component are arranged on the same horizontal plane; or,

10. A shrapnel according to claim 9, wherein the inner component is configured to have an undulating shape in a horizontal direction.

11. An elastic sheet according to claim 9, wherein the young's modulus of the material from which the sheet is made is any value between 120 and 300 Gpa.

12. A spring plate according to claim 11, characterized in that the young's modulus of the material of which the spring plate is made is 120Gpa, 140Gpa, 160Gpa, 180Gpa, 190Gpa, 200Gpa, 220Gpa, 240Gpa, 260Gpa, 280Gpa, 300 Gpa.

13. A shrapnel according to claim 9, characterized in that said outer and inner components are configured in a racetrack shape or in a quadrilateral shape or in a circular shape; or,

14. The clip of claim 9, wherein the outer member defines one or more alignment slots and/or alignment holes.

15. A bone conduction sound emitting device comprising the elastic sheet according to any one of claims 1 to 14.