CN210866002U

CN210866002U - Spring sheet type membrane switch

Info

Publication number: CN210866002U
Application number: CN202020027175.2U
Authority: CN
Inventors: 陆志雄; 马喻瀚
Original assignee: Dongguan Yuanjiaxin Film Switch Co ltd
Current assignee: Dongguan Yuanjiaxin Film Switch Co ltd
Priority date: 2020-01-07
Filing date: 2020-01-07
Publication date: 2020-06-26
Anticipated expiration: 2030-01-07

Abstract

The utility model discloses a shell fragment type membrane switch through setting up current conducting plate, heat-conducting piece and connecting band. In the practical application process, the heat conducting piece is arranged to play a role in heat dissipation, the heat of the heat conducting layer is transmitted to the U-shaped heat conducting ring through the heat conducting connecting sheet, the U-shaped heat conducting ring dissipates the heat into the outside air, and the heat can be well prevented from flowing back into the base material layer due to the heat conducting connecting sheet arranged in the middle, so that the heat dissipation performance is good; in addition, due to the arrangement of the insulating elastic sheet, after a user presses the elastic round convex part and outputs a relevant signal, the elastic round convex part can reset by depending on the elastic resetting force of the insulating elastic sheet, so that the situation that the elastic round convex part cannot reset due to overlarge pressing force of the user is prevented; moreover, the through holes are formed, when a user needs to carry the elastic sheet type membrane switch when going out, the user can grab the elastic sheet type membrane switch by correspondingly penetrating the through holes with fingers, and convenience in carrying the elastic sheet type membrane switch is greatly improved.

Description

Spring sheet type membrane switch

Technical Field

The utility model relates to a membrane switch technical field especially relates to a shell fragment type membrane switch.

Background

At present, a membrane switch is an operating system integrating a key function, an indicating element and an instrument panel. The circuit board consists of four parts, including a panel, an upper circuit, an isolating layer and a lower circuit. When the membrane switch is pressed down, the contact of the upper circuit deforms downwards to be in contact with the polar plate of the lower circuit for conduction, after the finger is loosened, the contact of the upper circuit rebounds, the circuit is disconnected, and the loop triggers a signal. The membrane switch has the advantages of rigorous structure, attractive appearance and good sealing property. Has the characteristics of moisture resistance, long service life and the like. The method is widely applied to the fields of electronic communication and electronic measurement instruments, industrial control, medical equipment, automobile industry, intelligent toys, household appliances and the like. The membrane switch is also called as a touch keyboard, adopts an integral sealing structure formed by combining a plurality of layers of planes, is a novel integrated light-collecting, mechanical and electrical electronic component which seals a key switch, a panel, a mark, a symbol display and a lining plate together, is a fundamental change of the appearance structure of an electronic product, can replace the keys of conventional discrete components, and can more reliably execute the task of an operating system.

With the existing membrane switch, the membrane switch has the function that when a user operates the membrane switch, the membrane switch can output a signal to the relevant external equipment, and the external equipment receives the relevant signal and then executes the relevant operation. The film switch is an electronic device, a circuit is arranged in the film switch, and therefore, the film switch can generate certain heat during working, the self heat dissipation capacity of the film switch is limited due to the small volume of the film switch, and the conventional research and development personnel consider the problem, the adopted scheme is that the heat conduction layer is arranged in the film switch, and the heat accumulated in the film switch is quickly dissipated by means of the quick heat conduction capacity of the heat conduction layer, so that the switch cooling treatment of a film is realized, but the mode has a defect, because the heat conduction layer is arranged in the film switch, the heat easily flows back to the film switch in the heat dissipation process, namely, the heat cannot be quickly dissipated to the film switch due to the backflow of the heat, and the heat dissipation effect is poor; in addition, the existing membrane switch is provided with keys with limited elastic resetting capability, so that when a user presses the keys with large force, the keys cannot be reset, namely the keys are damaged; moreover, the existing membrane switch is very inconvenient to carry, and a user cannot well carry the membrane switch to go out.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the weak point among the prior art, providing a heat dispersion preferred, can prevent that the heat dissipation came out from flowing back, the button is difficult to because pressing force is too big and damaged unable reset and the shell fragment type membrane switch that the user of being convenient for went out to carry.

The purpose of the utility model is realized through the following technical scheme:

a dome-type membrane switch comprising:

the conductive plate comprises a conductive layer, a substrate layer, a trigger plate group and a key group, wherein the conductive layer is provided with an accommodating groove, the substrate layer is arranged in the accommodating groove, a conductive circuit is etched in the substrate layer, the trigger plate group comprises a plurality of trigger plate groups, one of the trigger plate groups comprises a positive outer ring and a negative plate, the positive outer ring and the negative plate are both arranged on the substrate layer, the negative plate is positioned in the positive outer ring, the positive outer ring and the negative plate are both connected with the conductive circuit, the key group comprises a plurality of key bodies, one of the key bodies comprises an elastic circular convex part and an insulating elastic sheet, the elastic circular convex part is arranged on the positive outer ring, the elastic circular convex part is provided with a trigger layer at the top position, and the trigger layer is used for contacting with the negative plate, one end of the insulating elastic sheet is connected with the elastic round convex part, and the other end of the insulating elastic sheet is propped against the base material layer;

the heat conduction piece comprises a U-shaped heat conduction ring and a plurality of heat conduction connecting sheets, one end of each heat conduction connecting sheet is connected with the heat conduction layer, the other end of each heat conduction connecting sheet is connected with the U-shaped heat conduction ring, and the U-shaped heat conduction ring is provided with a plurality of through holes; and

the connecting band, the one end of connecting band with the substrate layer is connected, the other end of connecting band is used for being connected with external equipment.

In one embodiment, the conductive plate further includes an isolation layer, the isolation layer is provided with a plurality of avoiding holes, the isolation layer is disposed on the substrate layer, and the elastic round protrusions are exposed outside the avoiding holes in a one-to-one correspondence manner.

In one embodiment, the conductive plate further includes a plurality of magnetic attraction pieces, a plurality of avoiding grooves are formed in a side surface of the heat conductive layer away from the accommodating groove, and the magnetic attraction pieces are correspondingly arranged in the avoiding grooves.

In one embodiment, a plurality of anti-slip lines are arranged on one side surface, away from the accommodating groove, of the heat conduction layer, and intervals are arranged between every two adjacent anti-slip lines.

In one embodiment, the heat conducting member further includes a plurality of reinforcing ribs, one end of each of the reinforcing ribs is connected to the heat conducting layer, and the other end of each of the reinforcing ribs is connected to the U-shaped heat conducting ring.

In one embodiment, the heat conducting member includes 4 to 6 reinforcing rib pieces.

In one embodiment, the connecting band includes the output area body, golden finger and reinforcement piece, the one end of the output area body with the substrate layer is connected, the golden finger set up in the output area body on the other end, the reinforcement piece set up in the output area body is kept away from on a side of golden finger.

In one embodiment, the output belt body is provided with a positioning hole.

In one embodiment, the positioning hole is a circular hole.

The utility model discloses compare in prior art's advantage and beneficial effect as follows:

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a dome-type membrane switch according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a dome-type membrane switch at another viewing angle according to an embodiment of the present invention;

fig. 3 is a schematic view of the fitting state of the key body, the positive outer ring and the negative plate according to an embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" 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 represent the only embodiments.

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 herein in the description of the invention 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.

Referring to fig. 1, a dome-type membrane switch 10 includes a conductive plate 100, a heat conductive member 200, and a connection strap 300.

In this way, it should be noted that the conductive plate 100 functions as an output signal, and the signal is input into the connection band 300, and then the connection band 300 outputs the signal to the relevant external device; the heat conduction member 200 plays a role of heat conduction and heat dissipation, and prevents the dome-type membrane switch 10 from being damaged due to excessive heat accumulated therein.

Referring to fig. 1 and 3 together, the conductive plate 100 includes a heat conductive layer 110, a substrate layer 120, a trigger disk set 130 and a key set 140, the heat conductive layer 110 has a receiving slot 111, the substrate layer 120 is disposed in the receiving slot 111, conductive traces are etched in the substrate layer 120, the trigger disk set 130 includes a plurality of trigger disks 131, in one trigger disk 131, the trigger disk 131 includes a positive outer ring 1311 and a negative disk 1312, the positive outer ring 1311 and the negative disk 1312 are both disposed on the substrate layer 120, the negative disk 1312 is disposed in the positive outer ring 1311, the positive outer ring 1311 and the negative disk 1312 are both connected to the conductive traces, the key set 140 includes a plurality of keys 141, in one key 141, the key 141 includes an elastic circular convex portion 1411 and an insulating elastic sheet 1412, the elastic circular convex portion 1411 is disposed on the positive outer ring 1311, the elastic round convex portion 1411 is provided with a trigger layer 1411a at the top position, the trigger layer 1411a is used for contacting with the negative electrode plate 1312, one end of the insulating elastic sheet 1412 is connected with the elastic round convex portion 1411, and the other end of the insulating elastic sheet 1412 is abutted against the substrate layer 120.

In this way, when the user needs the dome-type membrane switch 10 to output a relevant signal, the elastic dome 1411 is pressed, the elastic dome 1411 moves toward the negative electrode plate 1312, and when the trigger layer 1411a contacts the negative electrode plate 1312, the conductive plate 100 outputs a signal to the connection strap 300.

It should be noted that, due to the arrangement of the insulating elastic sheet 1412, after the user presses the elastic round convex portion 1411 and outputs a relevant signal, the elastic round convex portion 1411 can be reset by the elastic resetting force of the insulating elastic sheet 1412, so as to prevent the situation that the user cannot reset due to an excessive pressing force.

Referring to fig. 1 and 2, the heat conducting member 200 includes a U-shaped heat conducting ring 210 and a plurality of heat conducting connecting pieces 220, one end of each heat conducting connecting piece 220 is connected to the heat conducting layer 110, the other end of each heat conducting connecting piece 220 is connected to the U-shaped heat conducting ring 210, and the U-shaped heat conducting ring 210 is provided with a plurality of through holes 211.

Therefore, it should be noted that the heat-conducting member 200 plays a role in heat dissipation, the heat of the heat-conducting layer 210 is transmitted to the U-shaped heat-conducting ring 220 through the heat-conducting connecting sheet 220, the U-shaped heat-conducting ring 220 dissipates the heat to the outside air, and the heat can be well prevented from flowing back to the substrate layer due to the heat-conducting connecting sheet 220 in the middle, so that the heat dissipation performance is good; moreover, the through holes 211 are formed, so that when a user needs to carry the elastic sheet type membrane switch out, the user can correspondingly pass a finger through the through holes to grab the elastic sheet type membrane switch 10, and convenience in carrying the elastic sheet type membrane switch is greatly improved.

Referring to fig. 1, one end of the connection tape 300 is connected to the substrate layer 120, and the other end of the connection tape 300 is used for connecting to an external device.

In this manner, it should be noted that the connection strap 300 outputs the signal generated by the conductive plate 100 to the relevant external device.

Further, referring to fig. 1 again, in an embodiment, the conductive plate 100 further includes an isolation layer 150, the isolation layer 150 is provided with a plurality of avoiding holes 151, the isolation layer 150 is disposed on the substrate layer 120, and the elastic round protrusions 1411 are exposed outside the avoiding holes 151 in a one-to-one correspondence manner.

In this way, the isolation layer 150 has the functions of isolation and protection, so as to prevent an electric shock accident caused by the fact that a human hand touches the substrate layer 120 unintentionally.

Further, referring to fig. 2 again, in an embodiment, the conductive plate 100 further includes a plurality of magnetic attraction members 160, a plurality of avoiding grooves are formed on a side surface of the heat conductive layer 110 away from the receiving groove 111, and the magnetic attraction members 160 are disposed in the avoiding grooves in a one-to-one correspondence manner.

Therefore, it should be noted that the magnetic attraction member 160 plays an attraction role, and when the elastic sheet type membrane switch 10 is prevented from being placed on a tabletop made of a ferrous material, the magnetic attraction member 160 can be relied on to stably prevent the magnetic attraction member from being placed on the tabletop made of the ferrous material.

Further, referring to fig. 2 again, in an embodiment, a plurality of anti-slip patterns 112 are disposed on a side surface of the heat conducting layer 110 away from the receiving groove 111, and a space is disposed between each two adjacent anti-slip patterns 112.

Thus, it should be noted that the plurality of anti-slip threads 112 all function to increase friction.

Further, referring to fig. 2 again, in one embodiment, the heat conducting member 200 further includes a plurality of reinforcing ribs 230, one end of each reinforcing rib 230 is connected to the heat conducting layer 110, and the other end of each reinforcing rib 230 is connected to the U-shaped heat conducting ring 210.

In this way, the arrangement of the plurality of reinforcing ribs 230 can improve the overall mechanical strength of the heat conducting member 200, and prolong the service life of the heat conducting member 200. Specifically, the heat-conducting member 200 includes 4 to 6 reinforcing rib pieces 230. As described above, the heat conducting member includes 4 to 6 reinforcing rib pieces 230. As such, it should be noted that the number of the reinforcing ribs 230 is not set too much, otherwise the overall weight of the dome-type membrane switch 10 is affected.

Further, referring to fig. 1 and fig. 2 together, in one embodiment, the connection band 300 includes an output band 310, a gold finger 320 and a reinforcing sheet 330, one end of the output band 310 is connected to the substrate layer 120, the gold finger 320 is disposed on the other end of the output band 310, and the reinforcing sheet 330 is disposed on a side of the output band 310 away from the gold finger 320.

As such, it should be noted that the output tape 310 is used to output signals to external devices; the gold finger 320 is used for electrically connecting with an external device; the reinforcing sheet 330 serves to reinforce the overall strength of the output belt 310. Specifically, the output belt body 310 is provided with a positioning hole 311, and the positioning hole 311 is a circular hole.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A dome-type membrane switch, comprising:

2. The dome-type membrane switch of claim 1, wherein the conductive plate further comprises an isolation layer, the isolation layer is provided with a plurality of avoiding holes, the isolation layer is disposed on the substrate layer, and the elastic round protrusions are exposed out of the avoiding holes in a one-to-one correspondence manner.

3. The dome-type membrane switch of claim 1, wherein the conductive plate further comprises a plurality of magnetic attraction members, a plurality of avoiding grooves are formed in a side surface of the heat conductive layer away from the accommodating groove, and the magnetic attraction members are correspondingly arranged in the avoiding grooves.

4. The dome-type membrane switch of claim 2, wherein a plurality of anti-slip stripes are disposed on a side surface of the heat conducting layer away from the receiving groove, and a space is disposed between each two adjacent anti-slip stripes.

5. The dome-shaped membrane switch of claim 1, wherein the heat conducting member further comprises a plurality of reinforcing ribs, one end of each reinforcing rib is connected to the heat conducting layer, and the other end of each reinforcing rib is connected to the U-shaped heat conducting ring.

6. A dome-shaped membrane switch according to claim 5, characterized in that said heat conducting member comprises 4-6 of said reinforcing ribs.

7. The dome-type membrane switch of claim 1, wherein the connection band comprises an output band, a gold finger and a reinforcement plate, one end of the output band is connected to the base layer, the gold finger is disposed on the other end of the output band, and the reinforcement plate is disposed on a side surface of the output band away from the gold finger.

8. The dome-shaped membrane switch of claim 7, wherein the output belt has positioning holes.

9. The dome-shaped membrane switch of claim 8, wherein said positioning hole is a circular hole.