CN201123174Y

CN201123174Y - Thin film switch circuit and key using same

Info

Publication number: CN201123174Y
Application number: CNU2007201255075U
Authority: CN
Inventors: 叶亮达; 颜志仲
Original assignee: Darfon Electronics Corp
Current assignee: Darfon Electronics Corp
Priority date: 2007-08-17
Filing date: 2007-08-17
Publication date: 2008-09-24
Anticipated expiration: 2017-08-17

Abstract

The utility model provides a membrane switch circuit and applied this membrane switch circuit's a button. The key comprises an elastic component, and the elastic component is arranged on the film switch circuit. The thin film switch circuit of the present invention includes a thin film circuit, an adhesive layer and an insulating layer. The thin film circuit has a switch thereon. The adhesive layer is formed on the thin film circuit and surrounds the switch. The adhesive layer has at least one notch. The insulating layer is formed on the adhesive layer. The insulating layer has a hole, and the switch is exposed in the hole. A bottom portion of the elastic member is adhered to the insulating layer. In particular, the at least one indentation covered by the bottom of the elastic member serves as at least one vent hole.

Description

Film switch circuit and use the button of this film switch circuit

Technical field

The utility model is about a kind of film switch circuit (membrane switch circuit) and use the button (keyswitch) of this film switch circuit.

Background technology

Keyboard is a most general present input unit, and it can be applied in various electronic equipments, as household PC, notebook computer, personal digital assistant or other similar electronic equipments.Because the sound that thin film type keyboard produces when pressing keys is less, so be widely used.

In the manufacture process of the button of thin film type keyboard, a flexible member can be bonded on the insulating barrier of a film switch circuit.This kind flexible member is influenced by the air of flexible member inside deeply in the process of pushing.If button itself has the designing and arranging pore, with make flexible member push and the process of resilience in more smooth, to promote the user at the smooth degree that uses on the keyboard.

Yet the design of the position of steam vent also is an important consideration.For example, United States Patent (USP) 6,191,776B1 promptly provide a kind of press-key structure with steam vent.Though this steam vent reaches the function of exhaust,,, make the interior circuit sustain damage of keyboard so exist liquid (for example water or beverage etc.) to pour into risk the keyboard from steam vent because it is formed at base plate.

Therefore, main purpose of the present utility model is to provide a kind of film switch circuit that is applied to a button, to address the above problem.

The utility model content

A purpose of the present utility model is the button that a kind of film switch circuit is provided and uses this film switch circuit.This button comprises an elastic component (deformable member), and this elastic component is arranged on this film switch circuit.

In order to realize the purpose of this utility model, according to a specific embodiment of the present utility model, this film switch circuit comprises a thin film circuit (membrane circuit), an adhesion coating (adhering layer) and an insulating barrier (insulating layer).

This thin film circuit has a switch (switch) on it.This adhesion coating is formed on this thin film circuit and around this switch.This adhesion coating has at least one breach (gap).This insulating barrier is formed on this adhesion coating.This insulating barrier has a hole (hole), and this switch is exposed in this hole.

One bottom of this elastic component will adhere to this insulating barrier and, especially, this at least one breach that is covered by this bottom of this elastic component is as at least one steam vent (vent).

According to another specific embodiment of the present utility model is a kind of button.This button comprises a keycap (keycap), a substrate (substrate), a thin film circuit, an adhesion coating, an insulating barrier, an elastic component and a bracing or strutting arrangement (supporting device).

This thin film circuit is arranged on this substrate and this thin film circuit has a switch on it.This adhesion coating is formed on this thin film circuit and around this switch, this adhesion coating has at least one breach.This insulating barrier is formed on this adhesion coating.This insulating barrier has a hole, and this switch is exposed in this hole.This elastic component adheres to this insulating barrier with the bottom of itself.Especially, this at least one breach that is covered by this bottom of this elastic component is as at least one steam vent.

This bracing or strutting arrangement is attached to this keycap and this substrate respectively movably.This bracing or strutting arrangement supports this keycap and does vertical moving with respect to this substrate, and this elastic component activated and then open this switch in response to this keycap mobile.When this keycap when this substrate moves, the air in this elastic component is overflowed by this at least one steam vent.

Advantage of the present utility model is, compared to prior art, be applicable to the film switch circuit of button because the designing and arranging pore is arranged itself according to of the present utility model, with make in the button elastic component be pressed and the process of resilience in more smooth, to promote the user at the smooth degree that uses on the keyboard.In addition, because vent design in film switch circuit, therefore can avoid liquid to pour into the keyboard from steam vent, cause the circuit sustain damage in the keyboard.

Can be further understood by following utility model detailed description and accompanying drawing about advantage of the present utility model and spirit.

Description of drawings

Fig. 1 illustrates a kind of film switch circuit that is used for a button according to a specific embodiment of the present utility model.

Fig. 2 illustrates the cross section view according to the film switch circuit of a specific embodiment of the present utility model.

Fig. 3 illustrates a kind of button according to another specific embodiment of the present utility model.

The main element symbol description

1: film switch circuit 2: elastic component

10: thin film circuit 12: adhesion coating

14: insulating barrier 100: switch

140: hole 3: button

30: keycap 32: substrate

34: thin film circuit 36: adhesion coating

38: insulating barrier 40: elastic component

42: bracing or strutting arrangement 340: switch

380: 3400: the first current-carrying parts of hole

3402: the second current-carrying parts

Embodiment

See also Fig. 1.Fig. 1 illustrates a kind of film switch circuit 1 that is used for a button according to a specific embodiment of the present utility model.As shown in Figure 1, the elastic component 2 in this button is arranged on this film switch circuit 1.

As shown in Figure 1, this film switch circuit 1 comprises a thin film circuit 10, an adhesion coating 12 and an insulating barrier 14.

In one embodiment, this thin film circuit 10 substantially can by a PETG (Polyethylene Terephthalate, PET) made.

This thin film circuit 10 has a switch 100 on it.This adhesion coating 12 is formed on this thin film circuit 10 and around this switch 100.This adhesion coating 12 has at least one breach.In this embodiment, this adhesion coating 12 is an example to have a breach, but in actual applications then not as limit.

In one embodiment, this adhesion coating 12 can be made by a marine glue, but not as limit.

See also Fig. 2.Fig. 2 illustrates the cross section view according to the film switch circuit 1 of a specific embodiment of the present utility model.

As shown in Figure 2, this insulating barrier 14 is formed on this adhesion coating 12.This insulating barrier 14 has a hole 140, and this switch 100 is exposed in this hole 140.In actual applications, this insulating barrier 14 can be made by a resin (resin).

One bottom of this elastic component 2 adheres to this insulating barrier 14, and especially, this at least one breach that is covered by this bottom of this elastic component 2 can be used as at least one steam vent.Therefore, when this elastic component 2 was pressed, the air in the cavity of this elastic component 2 can escape in the atmosphere by this at least one steam vent.Whereby, this elastic component 2 be pressed and the process of resilience in will be more smooth, with help the user use on the keyboard more smooth and easy.

See also Fig. 3.Fig. 3 illustrates a kind of button 3 according to another specific embodiment of the present utility model.

As shown in Figure 3, this button 3 comprises a keycap (keycap) 30, a substrate (substrate) 32, a thin film circuit 34, an adhesion coating 36, an insulating barrier 38, an elastic component 40 and a bracing or strutting arrangement (supporting device) 42.

In one embodiment, this thin film circuit 34 substantially can by a PETG (Polyethylene Terephthalate, PET) made.

This thin film circuit 34 is arranged on this substrate 32 and this thin film circuit 34 has a switch 340 on it.

This switch 340 comprises second current-carrying part 3402 that one first current-carrying part (conductive portion) 3400 and separates with this first current-carrying part 3400.In actual applications, this first current-carrying part 3400 and this second current-carrying part 3402 and can be by a carbon paste (carbon paste) coating.

This adhesion coating 36 is formed on this thin film circuit 34 and around this switch 340, this adhesion coating 36 has at least one breach.In this embodiment, this adhesion coating 36 is an example to have a breach, but not as limit.

In one embodiment, this adhesion coating 36 can be made by a marine glue, but not as limit.

This insulating barrier 38 is formed on this adhesion coating 36.This insulating barrier 38 has a hole 380, and this switch 340 is exposed in this hole 380.This elastic component 40 adheres to this insulating barrier 38 with the bottom of itself.Especially, this at least one breach that is covered by this bottom of this elastic component 40 is as at least one steam vent.

This bracing or strutting arrangement 42 is attached to this keycap 30 and this substrate 32 respectively movably.These bracing or strutting arrangement 42 these keycaps 30 of support are done the vertical moving with respect to this substrate 32.This elastic component 40 is not comprising a contact portion (being shown among Fig. 3).Along with this elastic component 40 is depressed in response to the mobile of this keycap 30, this contact portion contacts this first current-carrying part 3400 and this second current-carrying part 3402 simultaneously and then opens this switch 340.In addition, when this keycap 30 when this substrate 32 moves, the air in this elastic component 40 is overflowed by this at least one steam vent.

Compared to prior art, be applicable to the film switch circuit of button because the designing and arranging pore is arranged itself according to of the present utility model, with make in the button elastic component be pressed and the process of resilience in more smooth, to promote the user at the smooth degree that uses on the keyboard.In addition, because vent design in film switch circuit, therefore can avoid liquid to pour into the circuit sustain damage that causes the keyboard in the keyboard from steam vent.

By the detailed description of above preferred specific embodiment, hope can be known description feature of the present utility model and spirit more, and is not to come category of the present utility model is limited with above-mentioned disclosed preferred specific embodiment.On the contrary, its objective is that hope can contain being arranged in the category of the present utility model of various changes and tool equality.Therefore, category of the present utility model should be done the broadest explanation according to above-mentioned explanation, contains the arrangement of all possible change and tool equality to cause it.

Claims

1. A membrane switch circuit for a button, the button includes an elastic member, the elastic member is arranged on the membrane switch circuit, it is characterized in that,

The membrane switch circuit includes:

a thin film circuit having a switch thereon;

an adhesive layer formed on the thin film circuit and surrounding the switch, the adhesive layer having at least one notch; and

an insulating layer, the insulating layer is formed on the adhesive layer, the insulating layer has a hole, and the switch is exposed in the hole;

Wherein a bottom of the elastic member is adhered to the insulating layer, and the at least one notch covered by the bottom of the elastic member serves as at least one vent hole.

2. The membrane switch circuit according to claim 1, wherein the membrane circuit is made of polyethylene terephthalate.

3. The membrane switch circuit according to claim 1, wherein the insulating layer is made of a resin.

4. The membrane switch circuit according to claim 1, wherein the adhesive layer is made of a waterproof glue.

5. The membrane switch circuit according to claim 1, wherein the elastic member is made of rubber.

6. A button, including:

One key cap;

a substrate;

It is characterized in that the key also includes:

A thin film circuit, the thin film circuit is arranged on the substrate and has a switch thereon;

an adhesive layer formed on the film circuit and surrounding the switch, the adhesive layer having at least one notch;

an elastic member adhered to the insulating layer with a bottom of itself, wherein the at least one notch covered by the bottom of the elastic member serves as at least one vent hole; and

a support device, the support device is movably connected to the key cap and the base plate respectively, the support device supports the key cap to move vertically relative to the base plate, wherein the elastic member is actuated in response to the movement of the key cap Then the switch is turned on, and when the keycap moves toward the base plate, the air in the elastic member escapes through the at least one vent hole.

7. The button according to claim 6, wherein the thin film circuit is made of polyethylene terephthalate.

8. The key according to claim 6, wherein the insulating layer is made of a resin.

9. The button according to claim 6, wherein the adhesive layer is made of a waterproof glue.

10. The key according to claim 6, wherein the elastic member is made of rubber.

11. The button according to claim 6, wherein the switch comprises a first conductive part and a second conductive part separated from the first conductive part, the elastic member includes a contact part, and the elastic member responds When the keycap is moved and pressed down, the contact portion simultaneously contacts the first conductive portion and the second conductive portion to turn on the switch.

12. The key according to claim 11, wherein the first conductive part and the second conductive part are coated with a carbon glue.