CN211265315U - Composite high-elasticity metal elastic sheet - Google Patents
Composite high-elasticity metal elastic sheet Download PDFInfo
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- CN211265315U CN211265315U CN201922360873.4U CN201922360873U CN211265315U CN 211265315 U CN211265315 U CN 211265315U CN 201922360873 U CN201922360873 U CN 201922360873U CN 211265315 U CN211265315 U CN 211265315U
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Abstract
The utility model discloses a composite high-elasticity metal elastic sheet, which comprises an elastic sheet body, a conductive rubber layer and conductive foam; the elastic sheet body comprises a pressing part and a supporting part, the pressing part is formed by an arc with stable elasticity, four supporting arms are arranged at the edge of the pressing part, and the supporting arms and the pressing part are combined to form a contact surface; the elastic piece body is covered by the lower surface paste of the elastic piece body, when the elastic piece body is pressed downwards to deform, the conductive rubber layer positioned on the lower surface of the elastic piece body can also deform along with the elastic piece body, the conductive rubber layer has elastic force for restoring after deformation, the elastic force is the same as the elastic force direction for restoring the elastic piece body, thereby the elastic performance of the elastic piece body can be enhanced, meanwhile, conductive foam is arranged under the supporting leg, the conductive foam can be compressed when a user presses the metal elastic piece, and the elastic performance of the metal elastic piece can be further improved through the elastic force of the conductive foam.
Description
Technical Field
The utility model relates to a metal shrapnel field technique especially indicates a metal shrapnel of compound high elasticity.
Background
The metal dome (also called metal dome, snap dome) is made of ultrathin (0.05 mm-0.1mm thickness) and ultrathin (generally higher hardness) stainless steel 301 or 304 materials. The metal elastic sheet is an important component of the switch. The metal elastic sheet is mainly applied to products such as membrane switches, contact switches, PCB boards, FPC boards, medical instruments and the like.
However, with the development and progress of technology, the volume of electronic devices is getting smaller and smaller, and the integration level of electronic components is getting higher, so that beryllium copper spring plate as the metal stamping type electromagnetic shielding material needs to be processed into a smaller size spring plate, which usually has poor elasticity, and a new technology is needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to a composite high-elasticity metal dome, which can effectively solve the problem of poor elasticity of the conventional metal dome.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a composite high-elasticity metal elastic sheet comprises an elastic sheet body, a conductive rubber layer and conductive foam; the elastic sheet body comprises a pressing part and a supporting part, the pressing part is formed by an arc with stable elasticity, four supporting arms are arranged at the edge of the pressing part, the supporting arms and the pressing part are combined to form a contact surface, the supporting part is formed by four supporting legs with the same structure, the supporting part, the pressing part and the supporting arms are integrally formed, and the supporting part extends outwards along the supporting arms; the conductive rubber layer is attached to the lower surface of the elastic sheet body, and the conductive foam is arranged on the lower surface of the conductive rubber and located right below the supporting legs.
As a preferred embodiment: the conductive rubber layer is formed by mixing, extruding and vulcanizing silicone rubber filled with conductive metal powder.
As a preferred embodiment: the lower surface of the pressing part is convexly provided with a pressing salient point.
As a preferred embodiment: the supporting arm is connected with the supporting legs through the folded surface, the folded surface is arranged in a downward inclined mode, the top end of the folded surface is connected with the tail ends of the supporting arms, and the bottom end of the folded surface is connected with the supporting legs.
As a preferred embodiment: an arc-shaped joint surface is arranged between the adjacent supporting arms.
As a preferred embodiment: the cross section of the conductive foam is rectangular.
Compared with the prior art, the utility model obvious advantage and beneficial effect have, particularly, can know by above-mentioned technical scheme:
the lower surface subsides through at the shell fragment body cover has the shell fragment body, press down at the shell fragment body and take place deformation, the electrically conductive rubber layer that is located shell fragment body lower surface also can take place deformation along with the shell fragment body, electrically conductive rubber layer has an elasticity that restores after deformation, this elasticity is the same with the elasticity direction that the shell fragment body restores, thereby can strengthen the elasticity performance of shell fragment body, and simultaneously, be equipped with electrically conductive bubble cotton at the lower surface of supporting legs, this electrically conductive bubble cotton also can compress when the user presses metal shrapnel, thereby can further improve the elasticity performance of metal shrapnel through the cotton elasticity of electrically conductive bubble.
To illustrate the structural features and functions of the present invention more clearly, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a top view of a preferred embodiment of the present invention;
FIG. 2 is a cross-sectional view of a preferred embodiment of the present invention;
fig. 3 is an enlarged view of the preferred embodiment of the present invention.
The attached drawings indicate the following:
10. spring plate body 11 and pressing part
12. Support part 121 and support leg
13. Pressing convex point 14, arc joint surface
15. Folded surface 20, conductive rubber layer
30. Conductive foam 40 and a support arm.
Detailed Description
Referring to fig. 1 to 3, a specific structure of a preferred embodiment of the present invention is shown, which includes a spring plate body 10, a conductive rubber layer 20 and a conductive foam 30.
The elastic sheet body 10 comprises a pressing part 11 and a supporting part 12, the pressing part 11 is formed by an arc shape with stable elasticity, the pressing part 11 protrudes upwards, the pressing stroke of the elastic sheet body 10 can be increased by designing the pressing part 11 in such a way, four supporting arms 40 are arranged at the edge of the pressing part 11, the supporting arms 40 and the pressing part 11 are combined to form a contact surface, the supporting part 12 is formed by four supporting legs 121 with the same structure, the supporting arms 40 can play a joint function for the pressing part 11 and the supporting legs 121, the supporting part 12, the pressing part 11 and the supporting arms 40 are integrally formed, and the supporting part 12 extends outwards along the supporting arms 40; the conductive rubber layer 20 is attached to the lower surface of the elastic sheet body 10, the conductive rubber layer 20 has a conductive function, meanwhile, the conductive rubber layer 20 also has high flexibility and high elasticity, and low stress compression sensitivity is high, so that the metal elastic sheet has high elastic performance and high sensitivity, and the conductive foam 30 is arranged on the lower surface of the conductive rubber layer 20 and located under the supporting legs 121, so that a buffering function can be achieved. The conductive foam 30 is disposed between the circuit board and the metal spring, and an adhesive is disposed between the conductive foam 30 and the circuit board (not shown).
In this embodiment, the conductive rubber layer 20 is formed by mixing, extruding and vulcanizing silicone rubber filled with conductive metal powder, the conductive metal powder can enable the conductive rubber layer 20 to have conductive performance, the pressing convex points 13 are convexly arranged on the lower surface of the pressing part 11, and when the pressing part is pressed in use, the pressing convex points 13 of the pressing part 11 are stressed to move downwards to contact with a circuit on a PCB, so that a loop is formed, current passes through, and the whole product can normally work.
Further, the supporting arm 40 is connected with the supporting leg 121 through a folding surface 15, the folding surface 15 is arranged in a downward inclined manner, the top end of the folding surface 15 is connected with the tail end of the supporting arm 40, and the bottom end of the folding surface 15 is connected with the supporting leg 121. Adjacent support arms 40 have arcuate engagement surfaces 14 therebetween. The cross section of the conductive foam 30 is rectangular.
Detailed description the working principle of the present embodiment is as follows:
the lower surface of the elastic sheet body 10 is provided with the conductive rubber layer 20 in an attaching manner, when the elastic sheet body 10 is pressed down to deform, the conductive rubber layer 20 positioned on the lower surface of the elastic sheet body 10 can also deform along with the elastic sheet body 10, when the conductive rubber layer 20 firstly contacts a circuit board (not shown), the conductive rubber layer 20 can restore the elastic sheet body 10 due to the elastic deformation, and thus the elasticity of the metal elastic sheet can be enhanced.
The utility model discloses a design focus lies in:
the elastic piece body is covered by the lower surface paste of the elastic piece body, when the elastic piece body is pressed downwards to deform, the conductive rubber layer positioned on the lower surface of the elastic piece body can also deform along with the elastic piece body, the conductive rubber layer has elastic force for restoring after deformation, the elastic force is the same as the elastic force direction for restoring the elastic piece body, thereby the elastic performance of the elastic piece body can be enhanced, meanwhile, conductive foam is arranged under the supporting leg, the conductive foam can be compressed when a user presses the metal elastic piece, and the elastic performance of the metal elastic piece can be further improved through the elastic force of the conductive foam.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a metal shell fragment of compound high elasticity which characterized in that: comprises a spring plate body, a conductive rubber layer and conductive foam; the elastic sheet body comprises a pressing part and a supporting part, the pressing part is formed by an arc with stable elasticity, four supporting arms are arranged at the edge of the pressing part, the supporting arms and the pressing part are combined to form a contact surface, the supporting part is formed by four supporting legs with the same structure, the supporting part, the pressing part and the supporting arms are integrally formed, and the supporting part extends outwards along the supporting arms; the conductive rubber layer is attached to the lower surface of the elastic sheet body, and the conductive foam is arranged on the lower surface of the conductive rubber and located right below the supporting legs.
2. The composite high elasticity metal dome of claim 1, wherein: the conductive rubber layer is formed by mixing, extruding and vulcanizing silicone rubber filled with conductive metal powder.
3. The composite high elasticity metal dome of claim 1, wherein: the lower surface of the pressing part is convexly provided with a pressing salient point.
4. The composite high elasticity metal dome of claim 1, wherein: the supporting arm is connected with the supporting legs through the folded surface, the folded surface is arranged in a downward inclined mode, the top end of the folded surface is connected with the tail ends of the supporting arms, and the bottom end of the folded surface is connected with the supporting legs.
5. The composite high elasticity metal dome of claim 1, wherein: an arc-shaped joint surface is arranged between the adjacent supporting arms.
6. The composite high elasticity metal dome of claim 1, wherein: the cross section of the conductive foam is rectangular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922360873.4U CN211265315U (en) | 2019-12-25 | 2019-12-25 | Composite high-elasticity metal elastic sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922360873.4U CN211265315U (en) | 2019-12-25 | 2019-12-25 | Composite high-elasticity metal elastic sheet |
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| Publication Number | Publication Date |
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| CN211265315U true CN211265315U (en) | 2020-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922360873.4U Active CN211265315U (en) | 2019-12-25 | 2019-12-25 | Composite high-elasticity metal elastic sheet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113808863A (en) * | 2021-09-17 | 2021-12-17 | 福立旺精密机电（中国）股份有限公司 | Snap dome elastic sheet and processing method thereof |
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2019
- 2019-12-25 CN CN201922360873.4U patent/CN211265315U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113808863A (en) * | 2021-09-17 | 2021-12-17 | 福立旺精密机电（中国）股份有限公司 | Snap dome elastic sheet and processing method thereof |
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