CN218038955U

CN218038955U - DOME membrane switch

Info

Publication number: CN218038955U
Application number: CN202222012870.3U
Authority: CN
Inventors: 钟宇通; 朱江; 黄乐; 张兰英
Original assignee: Dongguan Nanhuang Industrial Co ltd
Current assignee: Dongguan Nanhuang Industrial Co ltd
Priority date: 2022-08-02
Filing date: 2022-08-02
Publication date: 2022-12-13
Anticipated expiration: 2032-08-02

Abstract

The application discloses DOME membrane switch belongs to membrane switch. This application includes the supporting seat, and the bottom of supporting seat is provided with the PCB circuit board, and the both ends on PCB circuit board top all are provided with electrically conductive metal pole, and the bottom of PCB circuit board is provided with the gum layer, and the top of insulating layer is provided with the panel layer, and the top of panel layer is provided with presses the panel, and the both ends of pressing the panel bottom all are provided with the depression bar, and the below of depression bar is run through and is provided with metal shrapnel, the mid portion of metal shrapnel bottom is provided with the thickening piece, the both ends of metal shrapnel bottom all are provided with the contact piece. This application is through being provided with metal shrapnel, thickening piece, contact block, because contact block is protruding downwards, therefore the stroke between metal shrapnel and the electrically conductive metal pole reduces to during the switch-on circuit, can make the recessed stroke of metal shrapnel reduce, and then reduce metal shrapnel's elastic deformation, increased metal shrapnel's life effectively.

Description

DOME membrane switch

Technical Field

The application relates to a membrane switch, in particular to a DOME membrane switch.

Background

The DOME membrane switch is a PET thin sheet (including a metal elastic sheet also called a metal DOME) with a contact, is used as a switch on circuit boards such as PCBs and FPCs, plays an important role of a touch switch between a user and an instrument, enables the metal elastic sheet to be elastic and concave through pressing, switches on a PCB circuit, and elastically returns after no longer being pressed, thereby switching off the circuit.

The devices on the market are various and can basically meet the use requirements of people, but certain problems still exist: when a key on the device is pressed, the elastic concave stroke of the arched metal elastic sheet is larger, and after a large number of people press the arched metal elastic sheet, the service life of the arched metal elastic sheet is easily shortened due to overlarge elastic deformation, so that the device with longer service life is needed.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide a DOME membrane switch to solve the problem that the arched metal DOME of the device proposed in the above-mentioned background art is very easy to reduce the service life because of too large elastic deformation.

In order to achieve the above purpose, the present application provides the following technical solutions: a DOME membrane switch comprising. The supporting seat, the bottom of supporting seat is provided with the PCB circuit board, the both ends on PCB circuit board top all are provided with electrically conductive metal pole, the bottom of PCB circuit board is provided with the gum layer, the outside of supporting seat is provided with the wearing layer, the top of supporting seat is provided with the insulating layer, the top of insulating layer is provided with the panel layer, the top on panel layer is provided with presses the panel, the both ends of pressing the panel bottom all are provided with the depression bar, the below of depression bar is run through and is provided with metal shrapnel, the mid portion of metal shrapnel bottom is provided with the thickening piece, the both ends of metal shrapnel bottom all are provided with the contact piece.

By adopting the technical scheme, because the contact block protrudes downwards, the stroke between the metal elastic sheet and the conductive metal rod is reduced, so that the concave stroke of the metal elastic sheet can be reduced when a circuit is switched on, the elastic deformation of the metal elastic sheet is reduced, and the service life of the metal elastic sheet is effectively prolonged.

Preferably, the wear-resistant layer comprises a polyurethane plate layer, a silicon nitride layer and a polymer ceramic material layer, the polyurethane plate layer is arranged on the outer surface of the supporting seat, the silicon nitride layer is arranged on the outer surface of the polyurethane plate layer, and the polymer ceramic material layer is arranged on the outer surface of the silicon nitride layer.

Through adopting above-mentioned technical scheme, through the surface at the supporting seat set gradually polyurethane plate layer, silicon nitride layer and polymer ceramic material layer, can effectually strengthen the wear resistance of supporting seat, prolonged the life of supporting seat.

Preferably, the compression bar and the metal elastic sheet form fixed connection.

By adopting the technical scheme, the stability of the metal elastic sheet during operation can be improved.

Preferably, the compression bars are symmetrically distributed about the inner center point of the metal elastic sheet.

Through adopting above-mentioned technical scheme, the drive metal shrapnel that can be better removes.

Preferably, the insulating layer includes PVC polyethylene layer, ceramic-insulated coating, epoxy coating and trimerization ethylene anticorrosive paint layer, PVC polyethylene layer sets up the top at the supporting seat, ceramic-insulated coating sets up the top on PVC polyethylene layer, epoxy coating sets up the top at ceramic-insulated coating, trimerization ethylene anticorrosive paint layer sets up the top at epoxy coating.

By adopting the technical scheme, the ceramic insulating coating, the PVC polyethylene layer, the epoxy resin coating and the tripolyethylene anticorrosive coating layer are arranged outside the supporting seat, so that the insulating property and the anticorrosive property of the supporting seat can be improved.

Preferably, a thickening agent is added into the epoxy resin coating, and the thickening agent is silicon oxide.

By adopting the technical scheme, the corrosion resistance of the device can be effectively improved.

Preferably, the thickening block is made of an aluminum-copper alloy.

Through adopting above-mentioned technical scheme, can effectual intensity that has strengthened the thickening piece.

Preferably, the contact block is disposed directly above the conductive metal rod.

By adopting the technical scheme, the circuit of the device can be conveniently connected.

In summary, the present application includes at least one of the following advantages;

1. by arranging the metal elastic sheet, the thickening block and the contact block, the stroke between the metal elastic sheet and the conductive metal rod is reduced because the contact block protrudes downwards, so that the downward concave stroke of the metal elastic sheet can be reduced when a circuit is switched on, the elastic deformation of the metal elastic sheet is reduced, and the service life of the metal elastic sheet is effectively prolonged;

2. the wear-resistant layer is formed by the polyurethane plate layer, the silicon nitride layer and the polymeric ceramic material layer, and the polyurethane plate layer, the silicon nitride layer and the polymeric ceramic material layer are sequentially arranged on the outer surface of the supporting seat, so that the wear resistance of the supporting seat can be effectively enhanced, and the service life of the supporting seat is prolonged;

3. through being provided with the insulating layer, the insulating layer comprises PVC polyethylene layer, ceramic insulating coating, epoxy coating, the anticorrosive dope layer of trimerization ethylene, through having set gradually PVC polyethylene layer, ceramic insulating coating, epoxy coating and the anticorrosive dope layer of trimerization ethylene in the outside of supporting seat, can improve the insulating properties and the corrosion resisting property of supporting seat.

Drawings

FIG. 1 is a schematic front view of the present application;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1 of the present application;

FIG. 3 is a schematic view of the internal structure of the wear resistant layer of the present application;

fig. 4 is a schematic view of the internal structure of the insulating layer of the present application.

In the figure: 1. a panel layer; 2. a wear layer; 201. a polyurethane board layer; 202. a silicon nitride layer; 203. a layer of polymeric ceramic material; 3. a pressure lever; 4. a supporting seat; 5. a PCB circuit board; 6. a back adhesive layer; 7. a conductive metal rod; 8. a metal spring sheet; 9. an insulating layer; 901. a PVC polyethylene layer; 902. a ceramic insulating coating; 903. an epoxy resin coating; 904. a polyethylene trimer anticorrosive coating layer; 10. pressing the panel; 11. thickening blocks; 12. and a contact block.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Embodiments of the present application are described in further detail below with reference to figures 1-4.

With reference to fig. 1 and fig. 2, the present application provides an embodiment: the utility model provides a DOME membrane switch, including supporting seat 4, the bottom of supporting seat 4 is provided with PCB circuit board 5, the both ends on 5 tops of PCB circuit board all are provided with conductive metal pole 7, the bottom of PCB circuit board 5 bonds there is gum layer 6, conveniently install the device, the outside of supporting seat 4 bonds and has wearing layer 2, can effectually strengthen the wear resistance of supporting seat 4, the bonding of supporting seat 4 is provided with insulating layer 9, the bottom of insulating layer 9 is provided with insulating lug, can improve the insulating properties and the corrosion resisting property of supporting seat 4.

Insulating layer 9's bonding is provided with panel layer 1, panel layer 1's top bonds and has presses down panel 10, the both ends of pressing panel 10 bottom all are provided with depression bar 3, the below of depression bar 3 is run through and is provided with metal shrapnel 8, depression bar 3 constitutes fixed connection with metal shrapnel 8, can improve the stability of metal shrapnel 8 during operation, depression bar 3 constitutes the symmetric distribution about metal shrapnel 8's inside central point, the mid portion of metal shrapnel 8 bottom is provided with thickening piece 11, thickening piece 11 is made by the aluminium copper alloy, can strengthen thickening piece 11's intensity, the effectual intensity that strengthens metal shrapnel 8, the both ends of metal shrapnel 8 bottom all are provided with contact block 12, contact block 12 sets up directly over conductive metal pole 7, because contact block 12 is protruding downwards, therefore the stroke between metal shrapnel 8 and the conductive metal pole 7 reduces, thereby when the switch-on circuit, can make the recessed stroke of metal shrapnel 8 reduce, and then reduce metal shrapnel 8's elastic deformation, metal shrapnel 8's life has been increased effectively.

Referring to fig. 3, the wear-resistant layer 2 includes a polyurethane board layer 201, a silicon nitride layer 202 and a polymer ceramic material layer 203, the polyurethane board layer 201 is disposed on the outer surface of the supporting seat 4, the silicon nitride layer 202 is disposed on the outer surface of the polyurethane board layer 201, the polymer ceramic material layer 203 is disposed on the outer surface of the silicon nitride layer 202, the polyurethane board layer 201, the silicon nitride layer 202 and the polymer ceramic material layer 203 are sequentially disposed on the outer surface of the supporting seat 4, the wear-resistant performance of the supporting seat 4 can be effectively enhanced, and the service life of the supporting seat 4 is prolonged.

With reference to fig. 4, the insulating layer 9 includes a PVC polyethylene layer 901, a ceramic insulating coating 902, an epoxy resin coating 903 and a tripolymer ethylene anticorrosive coating layer 904, the PVC polyethylene layer 901 is disposed on the top of the supporting seat 4, the ceramic insulating coating 902 is disposed on the top of the PVC polyethylene layer 901, the ceramic insulating coating 902 and the PVC polyethylene layer 901 can improve the insulation property of the supporting seat 4, the epoxy resin coating 903 is disposed on the top of the ceramic insulating coating 902, a thickening agent is added in the epoxy resin coating 903, the thickening agent is silicon oxide, the tripolymer ethylene anticorrosive coating layer 904 is disposed on the top of the epoxy resin coating 903, the epoxy resin coating 903 and the tripolymer ethylene anticorrosive coating layer 904 can improve the anticorrosive performance of the supporting seat 4.

The application principle of the DOME membrane switch is as follows:

firstly, when in use, the contact block 12 is arranged at the bottom end of the metal elastic sheet 8, and the contact block 12 protrudes downwards, so that the stroke between the metal elastic sheet 8 and the conductive metal rod 7 is reduced, and when a circuit is switched on, the downward concave stroke of the metal elastic sheet 8 can be reduced, thereby reducing the elastic deformation of the metal elastic sheet 8 and effectively prolonging the service life of the metal elastic sheet 8;

secondly, the polyurethane plate layer 201, the silicon nitride layer 202 and the polymeric ceramic material layer 203 are sequentially arranged on the outer surface of the supporting seat 4, so that the wear resistance of the supporting seat 4 can be effectively enhanced, and the service life of the supporting seat 4 is prolonged;

finally, at first be provided with ceramic insulating coating 902 and PVC polyethylene layer 901 on the top of supporting seat 4 and can improve supporting seat 4's insulating nature, through being provided with epoxy coating 903 and trimerization ethylene anticorrosive paint layer 904, can improve supporting seat 4's corrosion resisting property, prolonged supporting seat 4's life.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a DOME membrane switch, includes supporting seat (4), its characterized in that: the bottom of supporting seat (4) is provided with PCB circuit board (5), the both ends on PCB circuit board (5) top all are provided with electrically conductive metal pole (7), the bottom of PCB circuit board (5) is provided with gum layer (6), the outside of supporting seat (4) is provided with wearing layer (2), the top of supporting seat (4) is provided with insulating layer (9), the top of insulating layer (9) is provided with panel layer (1), the top of panel layer (1) is provided with presses down panel (10), the both ends of pressing down panel (10) bottom all are provided with depression bar (3), the below of depression bar (3) is run through and is provided with metal shrapnel (8), the mid portion of metal shrapnel (8) bottom is provided with thickening piece (11), the both ends of metal shrapnel (8) bottom all are provided with contact piece (12).

2. A DOME membrane switch as claimed in claim 1, wherein: the wear-resistant layer (2) comprises a polyurethane plate layer (201), a silicon nitride layer (202) and a polymer ceramic material layer (203), the polyurethane plate layer (201) is arranged on the outer surface of the supporting seat (4), the silicon nitride layer (202) is arranged on the outer surface of the polyurethane plate layer (201), and the polymer ceramic material layer (203) is arranged on the outer surface of the silicon nitride layer (202).

3. A DOME membrane switch as claimed in claim 1, wherein: the compression bar (3) is fixedly connected with the metal elastic sheet (8).

4. A DOME membrane switch as claimed in claim 1, wherein: the compression bars (3) are symmetrically distributed about the inner center point of the metal elastic sheet (8).

5. A DOME membrane switch as claimed in claim 1, wherein: insulating layer (9) include PVC polyethylene layer (901), ceramic insulating coating (902), epoxy coating (903) and trimerization ethylene anticorrosive paint layer (904), PVC polyethylene layer (901) set up the top at supporting seat (4), ceramic insulating coating (902) set up the top at PVC polyethylene layer (901), epoxy coating (903) set up the top at ceramic insulating coating (902), trimerization ethylene anticorrosive paint layer (904) set up the top at epoxy coating (903).

6. A DOME membrane switch as claimed in claim 5, wherein: the thickening agent is added into the epoxy resin coating (903), and the thickening agent is silicon oxide.

7. A DOME membrane switch as claimed in claim 1, wherein: the thickening block (11) is made of aluminum-copper alloy.

8. A DOME membrane switch as claimed in claim 1, wherein: the contact block (12) is arranged right above the conductive metal rod (7).