CN214336608U

CN214336608U - Insulating type membrane switch

Info

Publication number: CN214336608U
Application number: CN202120765877.5U
Authority: CN
Inventors: 杨小林; 吴小青; 胡寅旺; 张剑英; 刘芳芳
Original assignee: Guangzhou Kay-Ee Membrane Keyboard Switch Corp
Current assignee: Guangzhou Kay-Ee Membrane Keyboard Switch Corp
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-10-01
Anticipated expiration: 2031-04-14

Abstract

The utility model belongs to the technical field of membrane switches, in particular to an insulation type membrane switch, which comprises a panel layer, an isolation layer, a circuit layer, a bottom layer and metal elastic sheets, wherein the front side and the back side of the circuit layer are provided with limit through grooves which are penetrated up and down, the left side and the right side of the isolation layer are provided with slots which are matched with electrodes, the middle part of the isolation layer is provided with assembly grooves which are matched with the two limit through grooves, the metal elastic sheets comprise basin-mounted elastic sheets, the left side and the right side of the basin-mounted elastic sheets are provided with L-shaped insertion sheets which are matched with the slots, the front side and the back side of the basin-mounted elastic sheets are provided with arc-shaped elastic sheets which penetrate through the assembly grooves and are assembled in the two limit through grooves respectively, can store two L shape inserted sheets and use produced metal debris for a long time through setting up two slots, avoid two mainlines to switch on because of metal debris nature, just so can promote the insulating effect of membrane switch.

Description

Insulating type membrane switch

Technical Field

The utility model belongs to the technical field of the membrane switch, concretely relates to insulating type membrane switch.

Background

The membrane switch is an operation system integrating a key function, an indicating element and an instrument panel. Compared with the traditional silica gel switch, the membrane switch has the characteristics of attractive appearance, good touch and the like, and is widely applied to the fields of electronic communication, electronic measuring instruments, industrial control, medical equipment, automobile industry, intelligent toys, household appliances and the like.

The membrane switch comprises panel layer, circuit layer and metal shrapnel usually, and the metal shrapnel setting just enables the circuit on the circuit layer to switch on between circuit layer and the panel layer through pressing metal shrapnel, and such membrane switch is after long-term the use, because the metal piece that metal shrapnel friction produced can lead to the circuit nature on circuit layer to switch on, and insulating effect is relatively poor, to above-mentioned problem, we have proposed an insulation type membrane switch.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the insulating type membrane switch is used for solving the problems in the background technology.

In order to realize the technical purpose, the utility model discloses a technical scheme as follows:

an insulation type membrane switch comprises a panel layer, an isolation layer, a circuit layer, a bottom layer and a metal elastic sheet;

the panel layer, the isolation layer, the circuit layer and the bottom layer are sequentially bonded and connected from top to bottom, electrodes are arranged on the left side and the right side of the upper end of the circuit layer, the two electrodes are respectively and electrically connected with a main line, limiting through grooves which penetrate through the circuit layer from top to bottom are formed in the front side and the rear side of the circuit layer, slots matched with the electrodes are formed in the left side and the right side of the isolation layer, and assembling grooves matched with the two limiting through grooves are formed in the middle of the isolation layer;

the metal shrapnel includes the basin dress shell fragment, the basin dress shell fragment is installed between isolation layer and panel layer, the basin dress shell fragment left and right sides all is equipped with the L shape inserted sheet with slot assorted, both sides all are equipped with arc shell fragment, two around the basin dress shell fragment the arc shell fragment all runs through the assembly groove and assembles respectively in two spacing logical inslots. The two slots can store metal debris generated by long-term use of the two L-shaped inserting pieces, natural conduction of the two main lines due to the metal debris is avoided, and therefore the insulation effect of the membrane switch can be improved; because the middle part of the isolation layer is provided with the assembly groove, metal debris can fall into the assembly groove even if overflowing the slot, and therefore the two main lines can still not be naturally conducted due to the metal debris.

The middle part of the isolation layer is also provided with a spring groove, a spring is assembled in the spring groove, and the upper end and the lower end of the spring are respectively abutted against the basin-mounted elastic sheet and the circuit layer. Therefore, the spring can assist the arc-shaped elastic sheet to return when the elasticity of the arc-shaped elastic sheet is weakened, and the problem that the arc-shaped elastic sheet cannot return to cause the two electrodes to be naturally connected is avoided.

And a rubber pad is assembled between the panel layer and the metal elastic sheet. The rubber pad can play a role in buffering when a user presses the metal elastic sheet so as to improve the pressing hand feeling of the metal elastic sheet.

The buffer slots are formed in the left side and the right side of the middle of the slot. Like this the dashpot can be spacing logical inslot store the metal piece, avoid the metal piece to pile up too high in spacing logical inslot.

The lower end of the arc-shaped elastic sheet is provided with a supporting sheet. The support sheet can increase the contact area between the arc-shaped elastic sheet and the bottom layer, so that the metal elastic sheet can be stably supported.

The lower end of the L-shaped inserting piece is bent in a U shape. Therefore, the lower end of the L-shaped inserting piece is bent in a U shape, the lowest end of the L-shaped inserting piece can form an arc surface, the lower end of the L-shaped inserting piece can be contacted with an electrode in a line mode, and therefore the contact area of the L-shaped inserting piece and the electrode can be reduced, and abrasion is further reduced.

The utility model discloses simple structure, reasonable in design can store two L shape inserted sheets through setting up two slots and use produced metal debris for a long time, avoids two mainlines to switch on because of metal debris nature, just so can promote the insulating effect of membrane switch.

Drawings

The invention can be further illustrated by means of non-limiting examples given in the figures.

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

fig. 2 is a schematic diagram of a distributed structure of an embodiment of an insulated thin-film switch according to the present invention;

fig. 3 is a schematic structural diagram of an isolation layer according to an embodiment of the insulated membrane switch of the present invention;

fig. 4 is a schematic structural diagram of a metal dome of an embodiment of the insulated membrane switch of the present invention.

The panel comprises a panel layer 1, an isolation layer 11, a circuit layer 12, a bottom layer 13, a metal elastic sheet 14, an electrode 2, a main line 21, a limiting through groove 22, a slot 23, an assembly groove 24, a basin-mounted elastic sheet 3, an L-shaped insertion sheet 31, an arc-shaped elastic sheet 32, a spring groove 25, a spring 15, a rubber mat 4, a buffer groove 41 and a support sheet 42.

Detailed Description

In order to make the present invention better understood by those skilled in the art, the technical solutions of the present invention are further described below with reference to the accompanying drawings and examples.

As shown in fig. 1-4, the insulated membrane switch of the present invention includes a panel layer 1, an isolation layer 11, a circuit layer 12, a bottom layer 13 and a metal dome 14;

the panel layer 1, the isolation layer 11, the circuit layer 12 and the bottom layer 13 are sequentially bonded and connected from top to bottom, the left side and the right side of the upper end of the circuit layer 12 are respectively provided with an electrode 2, the two electrodes 2 are respectively and electrically connected with a main line 21, the front side and the rear side of the circuit layer 12 are respectively provided with a limiting through groove 22 which penetrates up and down, the left side and the right side of the isolation layer 11 are respectively provided with an inserting groove 23 matched with the electrodes 2, and the middle part of the isolation layer 11 is provided with an assembling groove 24 matched with the two limiting through grooves 22;

metal shrapnel 14 includes potted shell fragment 3, and potted shell fragment 3 is installed between isolation layer 11 and panel layer 1, and the 3 left and right sides of potted shell fragment all are equipped with slot 23 assorted L shape inserted sheet 31, and both sides all are equipped with arc shell fragment 32 around the potted shell fragment 3, and two arc shell fragments 32 all run through assembly groove 24 and assemble respectively in two spacing logical grooves 22.

The two arc-shaped elastic sheets 32 are used for supporting the basin-mounted elastic sheet 3, and the two limiting through grooves 22 can limit the two arc-shaped elastic sheets 32, so that the metal elastic sheet 14 is prevented from moving forwards and backwards when being pressed; two slots 23 can carry out spacingly to two L shape inserted sheets 31, avoid metal shrapnel 14 to be moved about when being pressed.

When a user presses the metal elastic sheet 14 on the lower side of the panel layer 1, the basin-mounted elastic sheet 3 presses down the two arc-shaped elastic sheets 32, and meanwhile, the basin-mounted elastic sheet 3 drives the two L-shaped inserting sheets 31 to move downwards, so that the two L-shaped inserting sheets 31 respectively penetrate through the two slots 23 and are in contact with the two electrodes 2, and at the moment, the two main lines 21 are switched on by the metal elastic sheet 14.

The two slots 23 can store metal debris generated by long-term use of the two L-shaped inserting pieces 31, so that natural conduction of the two main lines 21 due to the metal debris is avoided, and the insulation effect of the membrane switch can be improved; since the fitting groove 24 is formed in the middle of the isolation layer 11, metal debris may fall into the fitting groove 24 even if it overflows the insertion groove 23, so that the two main lines 21 may not be naturally conducted by the metal debris.

The middle part of the isolating layer 11 is also provided with a spring groove 25, a spring 15 is arranged in the spring groove 25, and the upper end and the lower end of the spring 15 are respectively abutted against the basin-shaped elastic sheet 3 and the circuit layer 12. With the structure, the spring 15 can assist the arc-shaped elastic sheet 32 to return when the elasticity of the arc-shaped elastic sheet 32 is weakened, so that the two electrodes 2 are prevented from being naturally connected due to the fact that the arc-shaped elastic sheet 32 cannot return.

And a rubber cushion 4 is assembled between the panel layer 1 and the metal elastic sheet 14. With the structure, the rubber pad 4 can play a role in buffering when a user presses the metal elastic sheet 14, so that the pressing hand feeling of the metal elastic sheet 14 is improved.

The buffer grooves 41 are formed in the left side and the right side of the middle of the slot 23. Therefore, the buffer groove 41 can limit the storage of metal scraps in the through groove 22, and the metal scraps are prevented from being stacked too high in the through groove 22.

The lower end of the arc-shaped elastic sheet 32 is provided with a support sheet 42. The support sheet 42 can increase the contact area between the arc-shaped elastic sheet 32 and the bottom layer 13, so that the metal elastic sheet 14 can be stably supported.

The lower end of the L-shaped inserting piece 31 is bent in a U shape. Therefore, the lower end of the L-shaped inserting piece 31 is bent in a U shape, the lowest end of the L-shaped inserting piece 31 can form an arc surface, the lower end of the L-shaped inserting piece 31 can be contacted with the electrode 2 in a line mode, and therefore the contact area of the L-shaped inserting piece 31 and the electrode 2 can be reduced, and abrasion is further reduced.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. An insulated membrane switch, characterized in that: the metal elastic sheet comprises a panel layer, an isolation layer, a circuit layer, a bottom layer and a metal elastic sheet;

the metal shrapnel includes the basin dress shell fragment, the basin dress shell fragment is installed between isolation layer and panel layer, the basin dress shell fragment left and right sides all is equipped with the L shape inserted sheet with slot assorted, both sides all are equipped with arc shell fragment, two around the basin dress shell fragment the arc shell fragment all runs through the assembly groove and assembles respectively in two spacing logical inslots.

2. The insulated membrane switch according to claim 1, wherein: the middle part of the isolation layer is also provided with a spring groove, a spring is assembled in the spring groove, and the upper end and the lower end of the spring are respectively abutted against the basin-mounted elastic sheet and the circuit layer.

3. The insulated membrane switch according to claim 1, wherein: and a rubber pad is assembled between the panel layer and the metal elastic sheet.

4. The insulated membrane switch according to claim 1, wherein: the buffer slots are formed in the left side and the right side of the middle of the slot.

5. The insulated membrane switch according to claim 1, wherein: the lower end of the arc-shaped elastic sheet is provided with a supporting sheet.

6. The insulated membrane switch according to claim 1, wherein: the lower end of the L-shaped inserting piece is bent in a U shape.