WO2020237711A1

WO2020237711A1 - Vibration transmission plate

Info

Publication number: WO2020237711A1
Application number: PCT/CN2019/090401
Authority: WO
Inventors: 许炜东; 金承喆
Original assignee: 东莞市富新电子有限公司; 汉尔科技有限公司
Priority date: 2019-05-31
Filing date: 2019-06-06
Publication date: 2020-12-03
Also published as: CN209659613U

Abstract

The present utility model provides a vibration transmission plate comprising a plate body. The plate body comprises an outer ring plate, n wave-shaped plates connected to an inner side of the outer ring plate, a middle ring plate connected to an inner side of the n wave-shaped plates, and an inner ring plate connected to an inner side of the middle ring plate, where n is an integer greater than or equal to 3. A first connection plate is connected between each wave-shaped plate and the middle ring plate. Two second connection plates and a third connection plate are connected between the middle ring plate and the inner ring plate, and the width of the second connection plate is greater than that of the third connection plate. The vibration transmission plate of the utility model can be applied to a bone conduction speaker to improve the sound quality thereof.

Description

A kind of vibration plate

Technical field

The utility model relates to the field of loudspeakers, in particular to a vibration transmission sheet.

Background technique

The reason why people can hear sound is because the vibration in the air transmits the vibration to the eardrum through the external ear canal, and the vibration formed by the eardrum drives the human auditory nerve. Using this principle, a bone conduction speaker appeared. When the bone conduction speaker was working, it was transmitted to the human auditory nerve through the human skin, subcutaneous tissue and bone, so that the human could hear the sound. Under normal circumstances, the human ear, as long as the middle and outer ears are not damaged or the ear canal is plugged by hand, the direct conduction of sound through the bones is much weaker than the output power of the sound through the air to the eardrum, which limits the performance of bone conduction speakers. application.

The vibration transmission sheet is a relatively important part of the bone conduction speaker, and its vibration transmission effect affects the quality of the bone conduction speaker. The vibration transmission sheet in the prior art is mostly a solid sheet structure, and its hardness is large, resulting in a small longitudinal displacement, thereby limiting the stroke of the bone conduction speaker and restricting its output power.

Utility model content

In view of the above problems, the present invention provides a vibration transmission sheet, which can be used in a bone conduction speaker to improve the sound quality of the bone conduction speaker.

In order to achieve the above purpose, the present invention solves the problem through the following technical solutions:

A vibration transmission sheet includes a sheet-shaped body including an outer ring sheet, n wave sheets connected to the inner side of the outer ring sheet, a middle ring sheet connected to the inner side of the n wave sheets, and a connection In the inner ring piece inside the middle ring piece, n is an integer greater than or equal to 3, a first connecting piece is connected between each of the wave pieces and the middle ring piece, and the middle ring piece and the inner ring piece Two second connecting pieces and a third connecting piece are connected between them, and the width of the second connecting piece is larger than the width of the third connecting piece.

Specifically, n is 4, the number of the wave sheets is 4, the wave sheets are of m-shaped structure, both ends of which are connected to the inner side of the outer ring sheet, and the middle part is connected to the first connecting sheet.

Specifically, the outer ring sheet, the wave sheet, the middle ring sheet, the inner ring sheet, the first connecting sheet, the second connecting sheet, and the third connecting sheet cooperate to form a plurality of hollow areas in the sheet-like body, all The ratio of the total area of the hollow area to the area of the sheet-shaped body is greater than 20%.

Specifically, the outer edge of the outer ring piece is provided with a relief gap, and the relief gap is located directly above the third connecting piece.

Specifically, two mounting holes are also provided on the outer ring sheet.

Specifically, the thickness of the sheet-shaped body is 0.1 mm.

The beneficial effects of the utility model are:

The vibration transmission plate of the utility model can be used in a bone conduction speaker. The three-layer structure of the outer ring plate, the middle ring plate and the inner ring plate is arranged to enable it to be capable of grading and coordinate vibration transmission, and at the same time, the elasticity of the vibration transmission plate is improved. Improve the resonance frequency of the vibration transmission plate to ensure the reliability of the sound quality.

Description of the drawings

Figure 1 is a schematic diagram of the structure of a vibration transmission sheet of the present invention.

The reference signs are: outer ring piece 1, relief gap 11, mounting hole 12, wave piece 2, middle ring piece 3, inner ring piece 4, first connecting piece 5, second connecting piece 6, third connecting piece 7, Hollowed area 8.

Detailed ways

Hereinafter, the present utility model will be further described in detail with reference to the embodiments and drawings, but the implementation of the present utility model is not limited to this.

As shown in Figure 1:

A vibration transmission sheet, including a sheet-shaped body, including an outer ring sheet 1, n wave sheets connected to the inner side of the outer ring sheet 1, a middle ring sheet 3 connected to the inner side of the four wave sheets 2, and The inner ring piece 4 inside the middle ring piece 3, each wave piece 2 and the middle ring piece 3 are connected with a first connecting piece 5, and the middle ring piece 3 and the inner ring piece 4 are connected with two second connecting pieces 6 and A third connecting piece 7 is provided with a three-layer structure of the outer ring piece 1, the middle ring piece 3, and the inner ring piece 4, so that it can be graded and coordinated with vibration transmission, and at the same time, the elasticity of the vibration transmission plate can be improved, and the performance of the vibration transmission plate can be improved. The resonance frequency ensures the reliability of sound quality;

The width of the second connecting piece 6 is greater than the width of the third connecting piece 7. When the vibration transmission plate is working, since the vibration is concentrated in the middle of the polarizing plate, the width of the two second connecting pieces 6 is increased, which can ensure the inner ring piece 4 At the same time, in order to ensure that the area of the hollow area 8 is as large as possible, and on the premise of this stability, to reduce the cost of metal materials required for molding, the width of the third connecting piece 7 does not need to be increased.

Preferably, the corrugated sheet 2 has an m-shaped structure, the two ends of which are connected to the inner side of the outer ring sheet 1, and the middle part is connected to the first connecting sheet 5. The m-shaped structure of the corrugated sheet 2 extends the length of the sheet and increases the vibration transmission The elasticity of the film also enables the sound source to produce greater displacement on the vibration transmission film, thereby enabling the bone conduction speaker to achieve higher sensitivity.

Preferably, the outer ring sheet 1, the wave sheet 2, the middle ring sheet 3, the inner ring sheet 4, the first connecting sheet 5, the second connecting sheet 6, and the third connecting sheet 7 cooperate to form a plurality of hollow areas in the sheet body 8. The hollow area 8 can connect the air above and below the vibration plate, thereby reducing the sound leakage of the bone conduction speaker. At the same time, in order to ensure the sensitivity of sound quality, the total area of all the hollow areas 8 and the area of the sheet body account for more than 20 %.

Preferably, the outer edge of the outer ring sheet 1 is provided with a relief gap 11, the relief gap 11 is located directly above the third connecting piece 7, and the relief gap 11 is used to restrict the vibration-transmitting sheet in the longitudinal direction after being installed in the conductive speaker. The outer ring sheet 1 is also provided with two mounting holes 12, and the gap 11 and the two mounting holes 12 are distributed in an isosceles triangle, which makes the vibration transmission sheet more stable after installation.

Preferably, the thickness of the sheet-shaped body is 0.1 mm.

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

Claims

A vibration transmission sheet comprising a sheet-shaped body, characterized in that the sheet-shaped body includes an outer ring sheet (1), n wave sheets (2) connected to the inner side of the outer ring sheet (1), and n middle ring pieces (3) inside the wave pieces (2) and inner ring pieces (4) connected to the inside of the middle ring pieces (3), n is an integer greater than or equal to 3, and each wave piece (2) A first connecting piece (5) is connected to the middle ring piece (3), and two second connecting pieces are connected between the middle ring piece (3) and the inner ring piece (4) (6) and a third connecting piece (7), the width of the second connecting piece (6) is greater than the width of the third connecting piece (7).
The vibration transmission plate according to claim 1, wherein n is 4, the number of wave plates (2) is 4, and the wave plates (2) are of m-shaped structure, and the two ends are connected Inside the outer ring piece (1), the middle part is connected with the first connecting piece (5).
The vibration transmission sheet according to claim 1, wherein the outer ring sheet (1), wave sheet (2), middle ring sheet (3), inner ring sheet (4), first connecting sheet ( 5). The second connecting piece (6) and the third connecting piece (7) cooperate to form a plurality of hollow areas (8) in the sheet-shaped body, and the sum of the areas of all the hollow areas (8) is The area of the sheet-shaped body accounts for more than 20%.
The vibration transmission sheet according to claim 1, wherein the outer edge of the outer ring sheet (1) is provided with a relief gap (11), and the relief gap (11) is located in the third The connecting piece (7) is directly above.
A vibration transmission sheet according to claim 4, wherein the outer ring sheet (1) is also provided with two mounting holes (12).
The vibration transmission sheet according to claim 1, wherein the thickness of the sheet-shaped body is 0.1 mm.