KR100838543B1 - Switch device - Google Patents

Abstract

assignment

Provided is a switch device that can accommodate and support a movable contact without using a spacer sheet, and can be thinned and parts can be reduced.

Resolution

A base member 1 having the fixed contact 2 formed thereon, a covering member 4 covering the upper surface side of the wiring pattern 3 of the base substrate 1 while exposing a part of the fixed contact 2; The upper surface of the base substrate 1 so as to cover the upper surface side of the swelling part of the click spring 5 which has the movable contact 5a which consists of the bulging part arrange | positioned so that it could face the fixed contact 2 foldably, and the swelling part of the click spring 5. The uncovered part 4a which consists of the opening part which provided the cover sheet 6 attached to the side, and was exposed to the covering member 4 located in the surface side in which the fixed contact 2 was formed, was exposed. While forming, it is connected to the uncovered portion 4a to form the air flow passage 4b when the click spring 5 is pressed to reverse the swelling portion, and the cover sheet 6 is attached to the covering member 4. It was adhesively supported to seal the upper surface side of the base substrate 1.

Description

Switch device {SWITCH DEVICE}

1 is a cross-sectional view showing a switch device of the present invention.

2 is a plan view showing a state in which a covering member is laminated on a base substrate on which a plurality of sets of fixed contacts of the switch device of the present invention are arranged.

3 is a plan view showing a base substrate on which a plurality of sets of fixed contacts of the switch device of the present invention are arranged.

4 is a plan view showing a sheet-like covering member of the switch device of the present invention.

5 is an exploded perspective view showing a state where a part of the conventional switch device is broken.

6 is a sectional view of principal parts showing a major part of a conventional switch device.

* Description of the symbols for the main parts of the drawings *

1: base substrate

1a: through hole

2: fixed contacts

2a: center contact

2b: peripheral contacts

3: wiring pattern

3a: connection pattern

3b: connection pattern

4: covering member

4a: bare skin

4b: air distribution

5: click spring

5a: movable contact

5b: starring

6: cover sheet

Japanese Laid-Open Patent Publication 2001-14973

TECHNICAL FIELD This invention relates to the structure of the switch apparatus using the film-form sheet key used as a switch for key operation of various electronic devices.

As a structure of the conventional key operation switch, it has the insulating sheet which has a some key operation part, the several movable contact which consists of a thin metal plate arrange | positioned at the back surface side of this insulating sheet, and a storage hole which accommodates this movable contact. The structure which consists of a spacer sheet and the base (circuit) board | substrate which has a fixed contact in the position corresponding to a plurality of movable contacts, respectively is known (for example, refer patent document 1).

The structure of this conventional switch device is shown to FIG. 5, FIG. Fig. 5 is an exploded perspective view of a part showing a conventional switch device, and Fig. 6 is a sectional view of principal parts showing a main part of a conventional switch device.

In the drawing, the first sheet 51 is formed by using an insulating material made of synthetic resin in the form of a film. An adhesive 52 is coated on one surface of the first sheet 51 and an adhesive surface is formed. . The movable contact 53 is formed in the dome shape which has the vertex part 53a by the spring-like metal material, and this vertex part 53a is reversed to the opposite side by the pressurization operation from the exterior.

Similarly to the first sheet 51, the second sheet 54 is formed by using an insulating material made of a synthetic resin in a film form, and an adhesive 55 is applied to one surface of the second sheet 54 and adhered to it. A face is formed. The second sheet 54 is provided with a plurality of circular storage holes 54a in which the movable contact 53 is housed, and the storage holes 54a are adjacent to each other storage holes 54a and 54a. The connection groove 54b which connects mutually is formed.

The circuit board 58 is formed with insulating laminated boards, such as a phenol resin. On this circuit board 58, a plurality of circuit patterns of the outer fixed contact 59 and the center fixed contact 60 are formed by printing carbon or the like or etching the copper foil or the like.

Next, the operation of the sheet switch will be described. When the operation portion of the push button (not shown) is pressed, the movable contact 53 pushed through the first sheet 51 performs the reverse operation, and the vertex portion 53a By contacting the center fixed contact 60, the electrical connection of the center fixed contact 60 and the outer fixed contact 59 of the circuit board 58 is made. Moreover, when the pressing force with respect to a push button is removed, the vertex part 53a of the movable contact 53 will move away from the center fixed contact 60 by the elastic return force of the movable contact 53, and a connection will be in an OFF state.

At this time, the plurality of circular storage holes 54a in which the movable contact 53 is accommodated is formed in the second sheet 54, and the storage holes 54a are adjacent to each other in the storage holes 54a. Since the connection groove 54b which connects between each other is formed, when the movable contact 53 is pressurized through the 1st sheet | seat 51, the air 61 in the dome of the movable contact 53 on a dome, It is led to the adjacent receiving hole 54a through the connecting groove 54b.

Therefore, even when the movable contact 53 attached to the outer peripheral portion of the first sheet 51 is pressurized, the air 61 in the dome of the movable contact 53 on the dome is extruded to the outside, and this air 61 ), No floating occurs at the end of the first sheet 51, and dust can enter from this end to prevent contact failure.

Moreover, when the movable contact 53 is pressurized, the place where the air 61 in the dome of the movable contact 53 on a dome will escape between the accommodating holes 54a which the 2nd sheet 54 adjoins mutually is secured. Since the movable contact 53 can be reversed reliably in the storage hole 54a, favorable operation peeling can be obtained.

However, in the above-described conventional switch device, since the spacer sheet having a storage hole for accommodating the movable contact is formed, the material cost is as high as that of forming the spacer sheet, and the thickness as the spacer sheet is added. There is a problem that the thickness of the entire switch device is inhibited.

Accordingly, an object of the present invention is to provide a switch device that can solve the above problems, can accommodate and support a movable contact without using a spacer sheet, and can be made thinner and reduce parts.

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, in this invention, as a 1st solution means, the base board which consists of a flexible film with a fixed contact, and a part of the said fixed contact are exposed, and the upper surface of the wiring pattern formed in the surface of this base substrate. A click spring having an insulating covering member covering the side, a movable contact formed of a reversible bulging portion arranged so as to be foldable to face the fixed contact, and the swelling of the click spring. A cover sheet made of a flexible film attached to the upper surface side of the base substrate so as to cover the upper surface side of the portion, and having an opening for exposing a part of the fixed contact portion to the covering member positioned on the surface side where the fixed contact is formed. While forming an uncoated portion, the click spring is pressed to form the uncoated portion and the swelling is performed. Is to form the air flow at the time of reversal, by supporting the pressure-sensitive adhesive and the cover sheet on the coating member was configured by sealing the upper surface of the base substrate.

Moreover, as a 2nd solution means, the said coating member consisted of the insulated resin film which punched the shape of the said uncovered part, and set it as the structure formed by adhering this insulated resin film to the said base substrate.

Moreover, as a 3rd solution means, a plurality of sets of said click springs and the said fixed contact which oppose this click spring are arrange | positioned on the said base board, and the said air flow path formed in the said cover member is adjacent between the click springs. It was set as the structure formed by connecting.

Moreover, as a 4th solution means, it was set as the structure which shifted so that the position of the said wiring pattern formed on the said base substrate, and the position of the said air flow path formed in the said cover member may not mutually overlap.

Implement the invention  Best form for

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is shown in FIGS. 1 is a cross-sectional view showing a switch device of the present invention, FIG. 2 is a plan view showing a state in which a covering member is laminated on a base substrate on which a plurality of sets of fixed contacts of the switch device of the present invention are arranged, and FIG. 3 is a switch of the present invention. 4 is a plan view showing a base substrate on which a plurality of sets of fixed contacts are arranged, and FIG. 4 is a plan view showing a covering member on a sheet of the switch device of the present invention.

In FIG. 1, the switch apparatus of this invention exposes the base substrate 1 which consists of a flexible film in which the fixed contact 2 was formed, and a part of the fixed contact 2, and this base substrate 1 A click having an insulating covering member 4 covering the upper surface side of the wiring pattern 3 formed on the surface of the wiring pattern 3 and a movable contact 5a made of an inverted swellable portion arranged to be foldable to face the fixed contact 2. It is mainly comprised from the cover sheet 6 which consists of the spring 5 and the flexible film attached to the upper surface side of the base substrate 1 so that the upper surface side of the bulging part of this click spring 5 may be covered.

The base board | substrate 1 is formed in the sheet form from the film which has a flexibility which consists of PET (polyethylene terephthalate) etc., for example. On the surface of the base substrate 1, a fixed contact 2 made of a conductive material such as silver or carbon is formed by a method such as printing. The fixed contact 2 is formed of a central contact 2a formed in a circular shape at the center, and a peripheral contact 2b formed in an arc shape or an annular shape with a constant gap around the center contact 2a, The fixed contact 2 is arrange | positioned in the base substrate 1 in multiple numbers. Moreover, between each adjacent peripheral contact 2b, the connection pattern 3b which consists of electrically conductive materials, such as silver and carbon, and electrically connects the peripheral contacts 2b is formed similarly.

3 illustrates a state where a plurality of sets of fixed contacts 2 are disposed on the base substrate 1 of the present invention. In this case, as shown in FIG. 3, the fixed contact 2 which consists of the center contact 2a and the peripheral contact 2b is arrange | positioned in plural sets on the surface of the base board | substrate 1. As shown in FIG. Moreover, the linear connection pattern 3b is formed in the peripheral part of the adjacent peripheral contact 2b, and each peripheral contact 2b, 2b is electrically connected by the connection pattern 3b. Moreover, each circular center contact 2a, 2a is connected with the connection pattern 3a of the back surface side by the center through-hole 1a.

In this embodiment, a wiring pattern 3 made of a conductive material such as silver or carbon is formed on the back surface of the base substrate 1, and the back surface of the back surface facing the center contact 2a formed on the surface is filled with a conductive material. The connection pattern 3a electrically connected with the center contact 2a through the through hole 1a is formed (see FIG. 1). In addition, although not shown, the connection pattern 3a electrically connects between each center contact 2a through the through-hole 1a. The wiring pattern 3 of the front and back surface of the base board | substrate 1 is comprised by these connection patterns 3a and 3b. Moreover, the insulating coating member 4 which consists of insulating resin films, such as an epoxy resin, is adhere | attached and formed on the surface of the base substrate 1, The upper surface side of the wiring pattern 3 is formed with this coating member 4; Covering.

As shown in FIG. 2, the surface of the base substrate 1 is almost covered by the covering member 4 in a state where all of the center contact 2a of the fixed contact 2 and a part of the peripheral contact 2b are exposed. It is completely covered. Moreover, the click spring 5 is arrange | positioned at the upper surface of the fixed contact 2 at the surface side of the base substrate 1, and the upper surface side of the base substrate 1 so that the upper surface side of this click spring 5 may be covered. The cover sheet 6 formed in the sheet form is laminated | stacked on it.

In the coating member 4 laminated | stacked on the surface side of the base substrate 1, as shown in FIG. 4, the some uncovered part 4a which consists of substantially circular opening part is formed, and these uncovered part 4a ), The covering member 4 is laminated on the surface of the base substrate 1 in a state where all of the center contact 2a of the fixed contact 2 and a part of the peripheral contact 2b are exposed (see FIG. 2).

Moreover, as shown in FIG. 4, the covering member 4 is provided with the air flow path 4b which consists of a linear opening part which connects between adjacent uncoated parts 4a located to the left and right. By forming this air flow path 4b, it is possible to let the air in the bulging part when the click spring 5 is pressurized and the movable contact 5a reverses | escapes to the adjacent uncovered part 4a.

Moreover, the connection pattern 3a electrically connected by the through-hole 1a is formed in the back side of the base substrate 1 in which the center contact 2a was formed, and the upper surface of this connection pattern 3a is formed. It is entirely covered by the covering member 4 so that it may cover, and is laminated | stacked and formed. Moreover, the non-coated part 4a and the air flow path 4b formed in these covering member 4 and the covering member 4 make the covering member 4 which consists of sheet-like insulated resin films by methods, such as a press. It is formed by punching, and is integrally laminated and formed by adhering this insulated resin film to the base substrate 1.

Moreover, the click spring 5 is arrange | positioned at the upper surface of the fixed contact 2 at the surface side of the base substrate 1, and the upper surface side of the base substrate 1 so that the upper surface side of this click spring 5 may be covered. It is supported by the cover sheet 6 formed in the sheet form with the flexible film which consists of PET (polyethylene terephthalate) etc. which were attached to it. The click spring 5 is made of a conductive thin metal sheet having a spring property, is formed in a circular shape having a domed swellable portion in the center, and a fixed contact 2 having a lower surface side of the swelled portion formed on the base substrate 1. ) Is movable contact 5a.

As for the click spring 5, the circular periphery 5b is always in contact with the peripheral contact 2b of the fixed contact 2, and it contacts, and the movable contact 5a of the lower surface side of a swelling part is fixed, and the fixed contact 2 Is mounted in a state opposite to the center contact 2a of the, and when the click spring 5 is inverted, the movable contact 5a and the center contact 2a come into contact with each other to turn on the switch.

In addition, the click spring 5 and the cover sheet 6 are integrated on the base substrate 1 by an adhesive material (not shown) applied to the lower surface of the cover sheet 6 and are integrated. And the cover sheet 6 is sealed by the coating member 4 so that the upper surface side of the base substrate 1 may be sealed.

In addition, in the present Example, the covering member 4 is formed from the insulating resin film which punched out the shape of the uncovered part 4a and the air flow path 4b, and this insulating resin film is adhere | attached on the base substrate 1 To form. And by doing in this way, the coating | coated part 4, the uncovered part 4a, and the air flow path 4b of the base substrate 1 can be formed easily, and the thickness of the insulating resin film which is the coating member 4 is made. Since the height of the air flow path 4b can be formed, the air flow path 4b which escapes the air in the bulging part when the click spring 5 reverses can be formed with high precision and can be supported. It is.

Moreover, on the base substrate 1, a plurality of sets of click springs 5 and the fixed contact 2 which opposes these click springs 5 are arrange | positioned, and the air flow path 4b formed in the coating member 4 is provided. Is formed by connecting between adjacent click springs 5 and 5. And by doing in this way, when the movable contact 5a of the click spring 5 reverses, the air which stayed in the bulging part will escape in the direction of the adjacent click spring 5 via the air flow path 4b. Therefore, the click feeling at the time of inversion of the click spring 5 becomes favorable, and it is possible to obtain the composite switch which was thin and integrated several switches in the sheet form easily.

In addition, in this embodiment, as shown in FIG. 2, the connection pattern which connects between the adjacent peripheral contacts 2b of each fixed contact 2 of the wiring pattern 3 formed on the base substrate 1 The position of the air flow path 4b which connects the position of 3b and the uncovered part 4a formed in the coating member 4 laminated | stacked on the base substrate 1 is formed so that it may not mutually overlap. . In this way, the positions of the wiring patterns 3 formed on the base substrate 1 and the positions of the air flow passages 4b formed on the covering member 4 are formed to be shifted so as not to overlap each other. Since the air flow path 4b can be lowered and formed only by the thickness, thickness reduction can be attained further.

According to the switch device of the present invention, in the covering member 4 located on the surface side where the fixed contact 2 is formed, an uncoated portion 4a made of an opening in which a part of the fixed contact 2 is exposed is formed. And an air flow path 4b when the click spring 5 is pressed to reverse the swelling portion, and the cover sheet 6 is adhesively supported on the covering member 4 by being formed in connection with the uncovered portion 4a. By sealing the upper surface side of the base substrate 1, the air flow path at the time of pressurization of the click spring 5 by using the covering member 4 covering the upper surface of the wiring pattern 3 formed on the base substrate 1 ( Since 4b) is formed, the spacer sheet becomes unnecessary, and the switch device can be provided at a low cost and thickness can be reduced.

As mentioned above, the switch apparatus of this invention exposes the base board which consists of a flexible film with a fixed contact, and a part of the fixed contact, and coat | covers the upper surface side of the wiring pattern formed in the front and back of the base substrate. A flexible spring attached to the upper surface side of the base substrate so as to cover the upper surface side of the swelling portion of the click spring, the click spring having an insulating covering member, a movable contact made up of a reversible swelling portion which is foldably opposed to the fixed contact. A cover sheet made of film and formed on the cover member positioned on the side of the surface where the fixed contact is formed, an uncovered portion formed of an opening for exposing a part of the fixed contact, connected to the uncovered portion, and the click spring is pressed The air flow path at the time of reversal of the bulge is formed, and the cover sheet is adhesively supported on the covering member. Since the upper surface side of the base substrate was sealed, a covering member covering the upper surface of the wiring pattern formed on the base substrate was used to form an air flow path when the click spring was pressed, so that a spacer sheet was unnecessary, and the thickness and parts were reduced. It is possible to reduce the cost and to provide a switch device at low cost.

The covering member is made of an insulated resin film formed by punching out the shape of the uncovered portion, and is formed by bonding the insulating resin film to the base substrate to form the height of the air flow path in accordance with the thickness of the insulating resin film which is the covering member. Since it can be formed, it can form and support with high precision.

Further, on the base substrate, a plurality of sets of the click springs and the fixed contact facing the click springs are disposed, and an air flow path formed in the covering member is formed between the adjacent click springs to form a thin and good click feel. The composite switch which integrated the several switch in the sheet form can be obtained easily.

Moreover, since the position of the wiring pattern formed on the base substrate and the position of the air channel formed in the covering member are shifted so as not to overlap each other, the air channel can be lowered and formed as much as the thickness of the wiring pattern. Can be planned.

Claims (4)

A base substrate made of a flexible film having peripheral and central fixed contacts formed thereon, an insulating coating member exposing a portion of the fixed contact and covering an upper surface side of a wiring pattern formed on the surface of the base substrate, and the fixed A click spring having a movable contact made of a reversible bulge that is arranged so as to be opposed to a contact so as to be foldable, and an upper surface side of the base substrate so as to cover an upper surface of the bulge of the click spring. A cover sheet having a cover sheet made of a flexible film attached to the cover member, and having an opening for exposing all of the central fixed contact portion and a part of the peripheral fixed contact portion to the covering member positioned on the side of the surface where the peripheral and central fixed contacts are formed. The abdomen is formed and connected to the uncovered part so that the click spring is pressed to reverse the bulge. Forming the air communication passage of time, and by supporting the adhesion of the cover sheet to the cover member and closing the upper surface side of the base substrate, And the position of the wiring pattern formed on the base substrate and the position of the air flow path formed in the covering member are shifted so as not to overlap each other. The method of claim 1, The said cover member consists of an insulated resin film which punched-out the shape of the said uncovered part, The said switch member was formed by adhering the said insulated resin film to the said base substrate. The method according to claim 1 or 2, A plurality of sets of the click springs and the central fixed contact facing the click springs are disposed on the base substrate, and the air flow path formed in the covering member is connected between adjacent click springs. Switch device. delete

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