CN215417962U

CN215417962U - Conductive spring sheet structure

Info

Publication number: CN215417962U
Application number: CN202121152749.XU
Authority: CN
Inventors: 林锡埼
Original assignee: ZHUHAI WEIDA ELECTRONICS CO Ltd
Current assignee: ZHUHAI WEIDA ELECTRONICS CO Ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2022-01-04
Anticipated expiration: 2031-05-26

Abstract

The utility model provides a conductive elastic sheet structure, which comprises a conductive elastic sheet, wherein an arched pressing part is formed on the central surface of the conductive elastic sheet, a first bending part which surrounds the outer edge of the pressing part and is bent downwards extends outwards from the periphery of the pressing part, a second bending part which surrounds the first bending part and is bent downwards extends outwards from the periphery of the first bending part, a plurality of abutting parts extend outwards from the periphery of the second bending part, the heights of the first bending part, the second bending part and the plurality of abutting parts are different, the stress amplitude of the conductive elastic sheet is reduced through different height designs so as to prolong the pressing service life, a long-stroke moving space is arranged in the conductive elastic sheet, good pressing hand feeling can be realized after pressing, a more stable pressing environment can be provided, and the sealed space in the conductive elastic sheet can effectively block the sound generated after pressing, the effect of reducing noise is achieved.

Description

Conductive spring sheet structure

Technical Field

The utility model relates to a conductive elastic sheet structure, in particular to a conductive elastic sheet structure which achieves the effects of increasing the pressing hand feeling by long-stroke movement, prolonging the pressing service life, providing a stable pressing environment and reducing noise by means of different heights of a first bending part, a second bending part and a plurality of abutting parts which are bent and extended downwards around a pressing part of the conductive elastic sheet.

Background

Modern science and technology advances, electronic products become indispensable products in people's life, and are seen everywhere in people's life, for example, TV, computer, electric cooker, microwave oven, water heater, etc. countless, and these electronics, electrical apparatus products all have a switch that can control the function of opening or closing, and along with the development of science and technology, modern equipment also do more and make a small difference, control switch is no exception, therefore in order to cooperate with the evolution of miniaturized electrical apparatus, the field of micro-gap switch has also been involved more and more.

Although the microswitch is small, the microswitch plays an irreplaceable role in daily life, and not only can realize automatic control and safety protection in equipment needing frequent circuit switching. At present, the material is widely applied to electronic equipment, instruments, mines, power systems, household electrical appliances, and military fields such as aerospace, aviation, missile, tanks and the like. In addition, they can also be applied to computer mouse, automobile electronic products, communication equipment, military products, and testing instruments, gas water heaters, gas stoves, small household appliances, microwave ovens, electric cookers, floating ball equipment accessories, medical instruments, building automation, electric tools and general electric and radio equipment, 24-hour timers.

The micro switch is provided with a vital part inside, namely a conductive elastic sheet, and the conductive elastic sheet is used for enabling two terminals inside the micro switch to be mutually conducted by pressing the conductive elastic sheet in the micro switch so as to form ON/OFF switching in the micro switch and achieve the purpose of pressing the micro switch.

However, the conductive elastic sheet on the micro switch often neglects the importance of the pressing hand feeling because of the small volume, when pressing the switch, the user often cannot feel whether the switch is switched, and the service life of the miniaturized elastic sheet is not as long as the original one, so that the conductive elastic sheet is frequently damaged.

SUMMERY OF THE UTILITY MODEL

Therefore, in view of the above problems and disadvantages, the present inventors have collected relevant data, evaluated and considered in many ways, and tried and modified continuously with years of experience accumulated in the industry, and developed a new patent for a conductive elastic sheet structure with a long life and a pressing hand feeling.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a conductive elastic sheet structure comprises a conductive elastic sheet, and is characterized in that: the center surface of the conductive elastic sheet is provided with an arched pressing part, the periphery of the pressing part is outwards extended with a first bending part which surrounds the outer edge of the pressing part and is bent downwards, the periphery of the first bending part is outwards extended with a second bending part which surrounds the first bending part and is bent downwards, and the periphery of the second bending part is outwards extended with a plurality of abutting parts;

the first bending part, the second bending part and the plurality of abutting parts have different heights respectively, the height of the pressing part is 0.121mm, the height of the first bending part is 0.107mm, the height of the second bending part is 0.040mm and the height of the plurality of abutting parts is 0.143 mm.

The pressing portion, the first bending portion, the second bending portion and the plurality of abutting portions are integrally formed.

The abutment is a semi-elliptical body.

The conductive elastic sheet is made of metal materials such as copper, aluminum, iron or steel.

Compared with the prior art, the utility model adopting the technical scheme has the advantages that: the first bending part, the second bending part and the plurality of abutting parts respectively have different heights, so that the effect of long stroke and increased pressing hand feeling is achieved, the height of the pressing part is 0.121mm, the height of the first bending part is 0.107mm, the height of the second bending part is 0.040mm, the height of the plurality of abutting parts is 0.143mm, the pressing force of the conductive elastic piece is 153gf, the hand feeling value of the conductive elastic piece is 49.3%, and the stroke distance of the conductive elastic piece is 0.306mm, the conductive elastic piece with the stress amplitude of 486MPa is formed according to the values, and the conductive elastic piece can bear 60 ten thousand times of pressing and increase the pressing hand feeling through long-stroke movement.

Drawings

Fig. 1 is a top view of a conductive elastic sheet structure according to the present invention.

Fig. 2 is a bottom perspective view of the conductive elastic sheet structure of the present invention.

Fig. 3 is a cross-sectional side view of hA of the conductive spring structure of the present invention.

Fig. 4 is a side sectional view of hB in the conductive dome structure of the present invention.

Fig. 5 is a side sectional view of hC of the conductive clip construction of the present invention.

Fig. 6 is a side sectional view of hD of the conductive spring structure of the present invention.

Fig. 7 is a reference top view of the configuration of the conductive spring structure of the present invention.

Fig. 8 is a bottom view of the conductive spring structure in use configuration.

Description of reference numerals: 1-a conductive elastic sheet; 11-a pressing part; 12-a first bend; 13-a second bend; 14-an abutment; 2-a seat body; 20-an accommodating space; 21-first terminal slot; 22-a second terminal slot; 23-a sealing flange; 24-a bump; 240-catching groove; 25-positioning grooves; 3-a terminal group; 31-a first terminal; 311-a first contact; 312 — a first weld; 3121-a first bonding side; 32-a second terminal; 321-a second contact; 322-a second weld; 3221-a second welding surface; 4-pressing a key; 41-a base; 42-an elastic member; 421-a pressing part; 422-pressing part; 5-cover body; 50-punching; 51-a limiting part; 52-a snap-fit portion; 520-a buttonhole; 521-locating block.

Detailed Description

Referring to fig. 1 and 2, a top view and a bottom view of a conductive elastic sheet structure of the present invention are shown, the conductive elastic sheet structure of the present invention mainly includes a conductive elastic sheet 1, and the connection relationship of the components is as follows:

the center surface of the conductive elastic sheet 1 is formed with an arched pressing portion 11, a first bending portion 12 extending outward around the outer edge of the pressing portion 11 and bending downward is formed at the periphery of the pressing portion 11, a second bending portion 13 extending outward around the first bending portion 12 and bending downward is formed at the periphery of the first bending portion 12, and a plurality of abutting portions 14 extend outward at the periphery of the second bending portion 13.

Referring to fig. 3 to 6, which are a side sectional view hA, a side sectional view hB, a side sectional view hC and a side sectional view hD of the conductive spring structure of the present invention, it can be clearly seen from the drawings that hA, hB, hC and hD are height dimensions of each part of the conductive spring 1, θ a, θ B and θ C are pressing angles of each part, h is the sum of the heights hA, hB, hC and hD, and R1 is the length dimension of the spring.

As shown in the following figure, the data of the sampling test of the conductive elastic sheet of the present invention are shown in the following table:

as can be understood from the above table, in the conductive elastic sheet OF the present invention, the sizes OF R1, Φ a, and hA affect the changes OF (pressing force), CK (tactile value), and ST (stroke), and hB, hC, and hD affect the changes OF ST.

It can be understood from the above table that when the OF and CK are required to be adjusted to the target values, wherein R1 and Φ A, hA change, ST will be driven to change in addition to the change OF and CK, and now after the OF and CK are adjusted to the target values, the ST cannot be within the target value due to the change OF R1 and Φ A, hA, so the structure OF hC and hD can effectively adjust ST while maintaining OF and CK.

In addition, the thickness OF the plate used by the conventional spring plate is 0.04mm, if different plate thicknesses are needed, the height OF the spring plate and the ST can be changed due to the plate thickness, in order to maintain the size assembly matching with other components, the structures OF hC and hD can be used as main structures for adjusting the ST and the height OF the spring plate, and the ST does not need to be adjusted by using parameters OF R1 and phi A, hA which influence OF and CK.

The hD structure can be used as a structure with a supporting function in finished product application, is placed in the inner cavity of the base and is in contact conduction with the terminal salient points.

The structure of the hD is applied to finished products, and is used for limiting in the inner cavity of the base because the maximum outer diameter of the structure is larger than the length and the width of the inner cavity of the base and is smaller than the diagonal distance of the inner cavity.

It can be seen from the above table that the formula OF the stress amplitude value is (maximum stress-minimum stress)/2, and according to the results OF the previous tests, if the stress amplitude value exceeds 800, the life OF the product is affected, and the pressing life OF the conductive dome sheet is 60 ten thousand times, and the lower the stress amplitude is, the longer the pressing life is, so that the x07_ a1 sample with the lowest stress amplitude value and the closest measured values OF, CK (hand feeling), and ST (stroke) is selected as the optimum.

Referring to fig. 1 to 6, in combination with the sample x07_ a1 in the above table, the height OF the pressing portion 11 is hA equal to 0.121, the height OF the first bent portion 12 is hB equal to 0.107, the height OF the second bent portion 13 is hC equal to 0.040, the height OF the plurality OF abutting portions 14 is hD equal to 0.143, the OF (pressing force) OF the conductive elastic piece 1 is 153gf, the CK (hand feeling) is 49.3%, the ST (stroke) distance is 0.286mm, and the stress amplitude OF the conductive elastic piece 1 is 486Mpa (pascal), which is the best value.

When the conductive elastic sheet 1 of the present invention is used, reference can be made to fig. 7 and 8, which are a top view for use and a bottom view for use and configuration of the conductive elastic sheet structure of the present invention, and when the conductive elastic sheet structure of the present invention is used for a push switch, the conductive elastic sheet structure mainly comprises a base body 2, a terminal group 3, two conductive elastic sheets 1, a key 4 and a cover body 5, and the connection relationship of the above components is as follows:

the base body 2 has an accommodating space 20 therein, a first terminal groove 21 and a second terminal groove 22 are concavely disposed at the bottom of the accommodating space 20 in the base body 2, the second terminal groove 22 is disposed between the first terminal grooves 21, a convex sealing flange 23 is disposed at the top of the base body 2, and the appearance of the base body 2 is a rectangular structure.

The terminal set 3 is disposed in the first terminal groove 21 and the second terminal groove 22 in the base 2, the terminal set 3 includes a first terminal 31 and a second terminal 32, the first terminal 31 has a plurality of first contact portions 311, one side of the first terminal 31 has a first soldering portion 312 extending and bending toward the bottom, one side of the second terminal 32 has a second contact portion 321, the other side of the second contact portion 321 opposite to the first contact portion 321 has a second soldering portion 322 extending and bending toward the bottom, the second contact portion 321 of the second terminal 32 is located between the plurality of first contact portions 311 on the first terminal 31, the first contact portion 311 and the second contact portion 321 present a raised plane structure, the first contact portion 311 adopts a plurality of designs to increase the contact area and reduce the poor conduction condition.

The center surfaces of the two conductive elastic sheets 1 are respectively formed with the arched pressing portion 11, the periphery of the pressing portion 11 extends outward with the first bending portion 12 surrounding the outer edge of the pressing portion 11 and bending downward, the periphery of the first bending portion 12 extends outward with the second bending portion 13 surrounding the first bending portion 12 and bending downward, and the periphery of the second bending portion 13 extends outward with the plurality of abutting portions 14.

The key 4 has a base 41 with a rectangular shape, the center of the base 41 is provided with an elastic member 42 with an oval shape, the top of the elastic member 42 has a pressing portion 421, and the bottom of the elastic member 42 opposite to the other side of the pressing portion 421 has a pressing portion 422.

The top of the cover 5 has a through hole 50, the through hole 50 is for the elastic element 42 of the key 4 to pass through, and the cover 5 has a plurality of position-limiting portions 51, two sides of the cover 5 have a buckling portion 52 extending to the bottom, the buckling portion 52 is recessed with a buckling hole 520, and the bottom side of the buckling portion 52 has a positioning block 521.

At least one protrusion 24 corresponding to the fastening holes 520 on both sides of the cover 5 is disposed on both sides of the base 2, the fastening groove 240 capable of engaging the positioning block 521 of the cover 5 is recessed at the bottom of the plurality of protrusions 24, and a positioning groove 25 corresponding to the first welding portion 312 and the second welding portion 322 is disposed on both sides of the base 2 not disposed with the plurality of protrusions 24.

The conductive elastic sheet structure of the present invention is located on the first terminal 31, and the plurality of abutting portions 14 will abut against the plurality of first contact portions 311 to form a multi-point contact, and the conductive elastic sheet 1 and the terminal set 3 are located inside the accommodating space 20, and the bottom of the pressing portion 11 of the conductive elastic sheet 1 is aligned with the second contact portion 321 of the second terminal 32.

The upper portion of the pressing portion 11 of the conductive elastic sheet 1 will be pressed against the pressing portion 422 at the bottom of the elastic member 42, and the upper portion of the conductive elastic sheet 1 is sequentially provided with the key 4 and the cover 5, thereby completing the assembly of the push switch.

When the push switch is actually used, the pressing portion 421 of the elastic member 42 is pressed to push the elastic member 42 to move downward, and the pressing portion 422 pushes the pressing portion 11 to push the pressing portion 11 downward and contact the second contact portion 321 to form an electrical connection, and the first welding portion and the second welding portion form a conduction state to drive an electronic device provided with the push switch to operate.

The present invention has the following advantages that as shown in fig. 3 to 6, it can be clearly seen that the conductive elastic sheet structure has the first bending portion 12, the second bending portion 13 and the plurality of abutting portions 14 with different heights, and the stress amplitude of the conductive elastic sheet 1 is reduced by the design of the plurality of different heights, so as to increase the service life of the conductive elastic sheet 1 (pressing for 60 ten thousands of times), and the conductive elastic sheet 1 has a long-stroke moving space therein, so that the pressing portion 11 has a good pressing hand feeling after being pressed, and the plurality of abutting portions 14 can provide a more stable pressing environment, and the sealed space inside the conductive elastic sheet 1 can not only provide a long-stroke moving distance, but also effectively block the sound generated after pressing, thereby achieving the effect of noise reduction.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. A conductive elastic sheet structure comprises a conductive elastic sheet, and is characterized in that: the center surface of the conductive elastic sheet is provided with an arched pressing part, the periphery of the pressing part is outwards extended with a first bending part which surrounds the outer edge of the pressing part and is bent downwards, the periphery of the first bending part is outwards extended with a second bending part which surrounds the first bending part and is bent downwards, and the periphery of the second bending part is outwards extended with a plurality of abutting parts;

2. The conductive clip construction of claim 1, wherein: the pressing portion, the first bending portion, the second bending portion and the plurality of abutting portions are integrally formed.

3. The conductive clip construction of claim 1, wherein: the abutment is a semi-elliptical body.

4. The conductive clip construction of claim 1, wherein: the conductive elastic sheet is made of metal materials such as copper, aluminum, iron or steel.