JP2002367478A - Sheet with contact plate, switch device using the same and manufacturing method of the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet with a contact plate, capable of easily forming a projection on the upper part of the sheet and of stabilizing an operation feeling in pressing operation, to provide a switch device using it and manufacturing method of the device. SOLUTION: This sheet with the contact plate is provided with a first sheet 1 with the upper surface side used for an abutting surface on a key top 20, the contact plate 5 having a swelled part and disposed on the undersurface side of the first sheet 1, and a second sheet 3 formed of a base material smaller than contact plate 5 and having an adhesive layer 4 on one surface. The top part of the swelled part of the contact plate 5 is stuck to the adhesive layer 4 of the second sheet 3, and the other surface of the second sheet 3 is held, by sticking it to the undersurface side of the first sheet 1 via an adhesive 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet with a contact plate used as a key switch for operating a digital communication device such as a portable telephone, a switch device using the same, and a method of manufacturing the same.

[0002]

2. Description of the Related Art A conventional sheet with a contact plate and a structure of a switch device using the same include a lower substrate on which fixed contacts are formed, a lower substrate laminated on the lower substrate, and a predetermined interval from the fixed contacts. A dome-shaped contact plate disposed oppositely is provided on a sheet with a contact plate integrally provided on the lower surface and on an upper surface of the sheet with the contact plate, and brings the contact plate into and out of contact with the fixed contact. It is generally composed of a key top for pressing operation.

The sheet with a contact plate is used by disposing a keytop for pressing operation on the upper surface side. When the keytop is pressed, the upper surface of the sheet with a contact plate is pressed. Is pressed, and the contact plate integrally provided on the lower surface is inverted downward and comes into contact with the fixed contact, thereby switching the contact.

Further, a projection for pressing the top of the dome-shaped contact plate is integrally formed at the center of the lower surface of the key top for pressing operation, and when the key top is pressed, the pressing force is reduced. Since the light is transmitted to the top of the contact plate via the protrusion on the lower surface, the contact plate is inverted with a click feeling and comes into contact with the fixed contact.

In this case, if there is a variation in the relative position between the projection on the lower surface of the key top at the time of the pressing operation and the dome top of the contact plate provided on the lower surface of the upper sheet, the operation feeling is affected. Therefore, in order to solve this, in the conventional configuration, instead of the protrusion on the lower surface of the keytop, a protrusion is formed on the lower surface of the upper sheet with a resin or an adhesive, and the protrusion is used to form the contact plate. A structure has been proposed in which the pressing force of the keytop is reliably transmitted to the top of the contact plate by pressing or bonding the top.

[0006]

However, in the above-described conventional sheet with a contact plate and the structure of the switch device using the same, the protrusions are formed by printing a resin or an adhesive on the lower surface of the upper sheet. Therefore, it is difficult to control the thickness of the projection, and in order to form the projection with the adhesive and hold the contact plate, the upper sheet and the contact plate are separated by a predetermined distance (the projection) until the adhesive is cured. (For the thickness), there is a problem that the work becomes complicated.

Accordingly, the present invention solves the above-mentioned problems, and can easily form projections on the upper sheet, and can stabilize the operation feeling at the time of pressing operation. It is an object of the present invention to provide a switch device using the same and a method for manufacturing the same.

[0008]

According to the present invention, as a first means for solving the above-mentioned problems, a first sheet having an upper surface serving as a contact surface of a key top and a bulging portion are provided. 1
A contact plate disposed on the lower surface side of the sheet, and a second sheet formed of a base material smaller than the contact plate and having an adhesive layer on one side, wherein the top of the bulging portion of the contact plate is The second sheet is adhered to the adhesive layer of the second sheet, and the other surface of the second sheet is adhered to and held on the lower surface side of the first sheet via an adhesive.

As a second means, the pressure-sensitive adhesive is
It is characterized in that it is applied to the lower surface side of the first sheet.

As a third means, there is provided a first sheet having an upper surface serving as a contact surface of a key top, and a contact plate having a bulging portion and provided on a lower surface of the first sheet. A second sheet formed of a base material smaller than the contact plate and having an adhesive layer on both sides thereof, wherein the top of the bulging portion of the contact plate is attached to one adhesive layer of the second sheet. The other adhesive layer of the second sheet is stuck and held on the lower surface side of the first sheet.

As a fourth means, a spacer sheet having a through hole for accommodating the second sheet is provided on the lower surface side of the first sheet, and the contact plate is inserted through the through hole. The second sheet is stuck and held on the adhesive layer of the second sheet.

As a fifth means, an adhesive layer is formed on the spacer sheet, and the spacer sheet is adhered to the lower surface of the first sheet by the adhesive layer.

As a sixth means, the contact plate is formed in a reversible dome shape, and the outer shape of the second sheet is 以下 or less of the outer shape of the contact plate, and the thickness of the contact plate is less than 1/2. Is formed so as to be 80% or more of the reversing movement amount.

According to a seventh aspect of the present invention, there is provided a sheet with a contact plate according to any one of the first to sixth means, and a contact substrate on which fixed contacts are provided. On the upper surface of the contact substrate on which the contacts are arranged, the contact plate is attached by an adhesive so as to face the fixed contact, and a key top for pressing is arranged on the upper surface side of the first sheet. Features.

As an eighth means, a second sheet body having an adhesive layer formed on one surface of a base material and a release sheet provided so as to cover the adhesive layer is removed by a predetermined method while leaving the release sheet. Half-cut into a shape, peel off the remaining base material other than the predetermined shape, and leave a small second sheet on the release sheet. This second sheet is a first sheet coated with an adhesive. Affixed to the pressure-sensitive adhesive forming surface of the body, peeled the release sheet from the second sheet to expose the adhesive layer, and affixed the bulge top of the dome-shaped contact plate to this adhesive layer to integrate It is characterized by having done.

As a ninth means, as a ninth means, a second sheet body having an adhesive layer formed on both surfaces of a substrate and a release sheet provided so as to cover one of the adhesive layers is removed by a predetermined method while leaving the release sheet. Half-cut into a shape, peeling off the remaining base material other than the predetermined shape and leaving a small second sheet on the release sheet, and passing the second sheet through the other adhesive layer through the second adhesive layer. Affixed to one sheet body, peeled the release sheet from the second sheet to expose one adhesive layer, and affixed the bulge top of the dome-shaped contact plate to this adhesive layer to integrate It is characterized by having done.

[0017]

FIG. 1 is a block diagram showing an embodiment of the present invention.
11 to FIG. FIG. 1 is a plan view showing a sheet with a contact plate of the present invention, FIG. 2 is a plan view showing a swelling state when the sheet with a contact plate is mounted on a contact board, and FIG. 3 is a sheet with a contact plate for a plurality of keys and contacts. Exploded perspective view of the substrate, FIG.
Fig. 5 is an exploded perspective view of a sheet with a contact plate for a single key and a contact substrate, Fig. 5 is an explanatory view showing a manufacturing process of the sheet with a contact plate,
FIG. 6 is a plan view showing another embodiment of the sheet with contact plates, FIG. 7 is an explanatory view showing a manufacturing process thereof, FIG. 8 is a plan view of a contact plate sheet provided with a spacer sheet, and FIG. FIG. 10 is a plan view showing another embodiment of a contact plate sheet provided with a spacer sheet, and FIG. 11 is an explanatory view showing a manufacturing process thereof.

FIGS. 1 and 2 show a sheet with a contact plate according to the present invention. A first sheet 1 as an upper sheet is formed in a square shape from one thin flexible resin sheet. .
The upper surface side of the first sheet 1 is a key top contact surface with which the flat lower surface of the key top 20 to be pressed is in contact, and the lower surface side is coated with an adhesive 2 on one surface. It has become.

The second sheet 3 is also formed of a thin, flexible resin sheet in a circular shape, and the second sheet 3 is formed of a small piece of a base material having a predetermined thickness. An adhesive layer 4 is formed on one surface of the substrate. The other surface of the second sheet 3 on which the adhesive layer 4 is not formed is attached to the lower surface of the first sheet 1 by the adhesive 2.

The second sheet 3 formed into small pieces has an outer shape that is １ ／ of the outer shape of a contact plate 5 described later.
The thickness is set so as to be 80% or more with respect to the amount of reversal movement of the contact plate 5 (stroke from pressing the top to buckling reversal). Set and formed. In this embodiment, the outer shape of the second sheet 3 is the outer diameter φ4 mm of the contact plate 5.
The outer diameter is 1.5 mm and the thickness is
Are formed to a thickness of 0.17 mm with respect to a reversal movement amount of 0.15 mm.

By forming the structure of the second sheet 3 so as to have the above-described outer shape and thickness, a good operation feeling can be obtained even for a small contact plate having a narrow pressing range. It is possible.

The contact plate 5 is formed so as to be capable of buckling inversion by expanding a conductive thin metal plate into a dome shape. The contact plate 5 has a dome-shaped top surface,
The lower surface of the first sheet 1 is adhered and held by the adhesive layer 4 via the second sheet, and the lower surface of the first sheet 1 is provided with the contact plate 5.
Is held, and the sheet with the contact plate is configured.

FIG. 2 shows a state where the first sheet 1 is pushed up by the second sheet 3 and the contact plate 5 when the sheet with the contact plate is mounted on the contact substrate 6 described later. I have. In this state, the adhesive 2 applied to the lower surface of the first sheet 1 is adhered to the outer peripheral edge of the contact plate 5.

FIGS. 3 and 4 show a case in which the above-mentioned sheet with a contact plate is mounted on a contact board on which fixed contacts are provided, by sticking through the adhesive 2 of the first sheet 1. 2 shows a configuration of a switch device.

FIG. 3 shows the configuration of a switch device for a plurality of keys. The contact board 6 is formed of a laminated board made of an insulating resin or the like. , A plurality of sets of fixed contacts 7 are formed. The fixed contact 7 is formed of an annular peripheral fixed contact 7a and a central fixed contact 7b arranged at the center of the peripheral fixed contact 7a. While being placed on the contact 7a and making contact therewith,
The central portion of the dome is disposed so as to face the central fixed contact 7b.

FIG. 4 shows the configuration of a switch device for a single key. The contact board 8 is formed by molding an insulating resin material into a box shape. A fixed contact 9 made of a conductive metal plate is integrally provided on the bottom surface by insert molding or the like. The fixed contact 9 includes a pair of peripheral fixed contacts 9a and a central fixed contact 9b arranged at the center of the peripheral fixed contacts 9a. The dome is placed on and in contact with the contact 9a, and the center of the dome is disposed so as to face the center fixed contact 9b.

When operating the above-mentioned switch device, the key top 20 for pressing operation is placed on the upper surface of the first sheet 1 above the dome-shaped contact plate 5.
Is selectively pressed, the top of the dome-shaped contact plate 5 is pushed downward via the second sheet 3. When a predetermined stroke is reached, the contact plate 5 is buckled and inverted, and the dome-shaped central portion comes in contact with the central fixed contacts 7b and 9b arranged opposite to each other, thereby transmitting a signal. The switching of the switch is performed.

According to the above configuration, even when a position shift occurs between the key top 20 and the sheet with the contact plate when the switch device is incorporated in the device, the key is moved to the top of the dome-shaped contact plate 5. Since the pressing force of the top 20 can be reliably transmitted, a good operation feeling can be obtained. In addition, the second
Since the sheet 3 is a flexible resin sheet, it does not hinder the buckling reversal operation of the contact plate 5.

Next, a method of manufacturing the above-mentioned sheet with a contact plate will be described with reference to FIG. First, a thin flexible resin sheet is formed from a base material having a predetermined thickness,
The second sheet body 13 provided with the adhesive layer 4 on one side and the release sheet 10 covering the same is half-cut into a predetermined shape while leaving the release sheet 10. (FIG. 5A) Next, the half-cut portion having the predetermined shape is the release sheet 1.
And peeling off the remaining substrate so as to remain on the release sheet 1
The second sheet 3 which has become a small piece on the left side is left. (FIG. 5B) Next, the second sheet 3 as a small piece is attached to the adhesive forming surface of the first sheet 11 to which the adhesive 2 has been applied.
(FIG. 5C) Next, after the peeling sheet 10 is peeled off from the second sheet 3 of the small pieces to expose the adhesive layer 4, the top of the bulging portion of the dome-shaped contact plate 5 is attached to the adhesive layer 4. By integrating them, a sheet with a contact plate is formed. (FIG. 5D)

According to the above configuration, the projection for pressing the top of the dome-shaped contact plate 5 is formed of a sheet-like base material smaller than the contact plate, and the second sheet 3 is Due to the adhesive layer 4 provided on one side, the contact plate 5
To the top of the contact plate 5,
The pressing force of the key top can be transmitted reliably.

On the lower surface of the first sheet 1, an adhesive 2 for attaching the second sheet 3 is applied to the first sheet 1.
It is not necessary to provide an adhesive on the surface to be adhered of the second sheet 3 because the adhesive is formed on the sheet 1 side of the second sheet 3. The processing can be easily performed without any trouble, and the handling of the remaining portion of the blanking becomes easy. In addition, since the small sheet of the second sheet 3 is attached to the adhesive 2 applied to the lower surface of the first sheet 1 so as to transfer the small sheet, the second sheet 3 of the small piece is placed at a predetermined position. It can be easily and securely attached.

In the above configuration, the first sheet 11 having the first sheet 1 and the second sheet 11 having the second sheet 3 are provided.
The sheet body 13 may be a roll-shaped continuous body or an individual sheet body as long as it is a thin sheet-shaped flexible resin sheet. Is obtained.

FIGS. 6 and 7 show another embodiment of the switch-equipped sheet. The same components as those described with reference to FIGS. 1 to 5 are denoted by the same reference numerals, and description thereof will be omitted.

In this case, the difference from the structure of the above-described embodiment is that the structures of the adhesive 2 and the adhesive layer 4 provided on the first sheet 1 and the second sheet 3 are different. That is, in this embodiment, the adhesive 2 is not applied to the lower surface side of the first sheet 1, and the adhesive layers 4, 4 are formed on both surfaces of the second sheet 3 instead.
Then, the dome-shaped top surface of the contact plate 5 is adhered to one of the adhesive layers 4, 4, and is adhered and held on the lower surface side of the first sheet 1 by the other adhesive layer 4. It has become.

Next, a method for manufacturing the above-mentioned sheet with a contact plate will be described with reference to FIG. First, a second sheet body 23 formed from a base material having a predetermined thickness and provided on both surfaces with the adhesive layers 4 and 4 and a release sheet 10 covering one adhesive layer 4 is removed by a predetermined method while leaving the release sheet 10. Half cut to the shape of. (FIG. 7A) Next, the half-cut portion having the predetermined shape is the release sheet 1.
And peeling off the remaining substrate so as to remain on the release sheet 1
The second sheet 3 which has become a small piece on the left side is left. (FIG. 7B) Next, the small sheet 2 is adhered to the first sheet body 21 via the other adhesive layer 4 of the second sheet 3. (FIG. 7C) Next, after exfoliating the release sheet 10 from the second sheet 3 of small pieces to expose one adhesive layer 4, the top of the bulging portion of the dome-shaped contact plate 5 is attached to the adhesive layer 4. By sticking and integrating, a sheet with a contact plate is formed. (FIG. 7D)

According to the above configuration, the adhesive layers 4 are provided on both surfaces of the second sheet 3, and the other of the adhesive layers 4 is used for attaching to the first sheet 1. The range of the contact plate 5 outside the outer shape of the second sheet 3 is not adhered to the first sheet, and the reversing operation is performed even for a small contact plate having a narrow pressing operation range. A good operation feeling without hindrance is obtained. Further, since the small piece of the second sheet 3 is attached to the first sheet 1 via the adhesive layer 4 so as to be transferred, the small piece of the second sheet 3 can be easily placed at a predetermined position. , Which can be securely attached.

FIGS. 8 to 11 show a structure in which a spacer sheet is formed on the lower surface side of the first sheet 1 so as to surround the contact plate 5.

FIGS. 8 and 9 show a structure in which a spacer sheet and a second sheet, which is a small piece sheet for pressing the contact plate, are formed simultaneously from the same sheet body. First, on a second sheet body 33 in which the adhesive layers 4, 4 and the release sheet 10 covering one adhesive layer 4 are provided on both surfaces of the second sheet 3, the release sheet 10 is left in a predetermined shape in half. At the time of cutting, the spacer sheet 50 is simultaneously formed on the peripheral surface of the second sheet 3 of the small pieces by half cutting.
(FIG. 9A)

When the remaining base material is peeled off so that the half-cut portion of the predetermined shape remains on the release sheet 10, and the small sheet 2 remains on the release sheet 10, The spacer sheet 50 is also left. (FIG. 9B)

Then, the second sheet 3 as a small piece and the other adhesive layer 4 of the spacer sheet 50 are adhered to the first sheet body 31 to form the second sheet 3 as a small piece.
And peeling off the release sheet 10 from the spacer sheet 50 to expose one adhesive layer 4, and then the second sheet 3 of small pieces
A sheet with a contact plate with spacers is formed by attaching and integrating the top of the bulged portion of the dome-shaped contact plate 5 to the adhesive layer 4. (FIG. 9C)

FIGS. 10 and 11 show a spacer sheet,
The configuration in the case where the second sheet which is a small piece sheet for pressing the contact plate is formed by separate sheet members having different thicknesses is shown. First, a release sheet 1 formed from a base material having a predetermined thickness and covering both sides of the adhesive layer 4 and one adhesive layer 4
0 is provided on the release sheet 10.
Is cut in half to a predetermined shape while leaving. (FIG. 11A) Then, the remaining base material is peeled off such that the half-cut predetermined shape portion remains on the release sheet 10, and the second sheet 3 which has become a small piece remains on the release sheet 10, The small sheet is adhered to the first sheet body 41 via the other adhesive layer 4 of the second sheet 3. (FIG. 11B)

Next, a spacer sheet body 61 formed of base materials having different thicknesses and provided on both sides with adhesive layers 44 and 44 and a release sheet 60 covering one adhesive layer 44 is fixed to a predetermined position while leaving the release sheet 60. Half cut to the shape of. (FIG. 11C) Then, the remaining base material was peeled off such that the half-cut predetermined-shaped portion remained on the release sheet 60, and the spacer sheet 51 was left on the release sheet 60 to form the second small pieces. First sheet body 41 to which the sheet 3 is attached
Is attached via the other adhesive layer 44 of the spacer sheet 51. (FIG. 11D)

After the peeling sheet 60 is peeled from the spacer sheet 51, the top of the bulging portion of the dome-shaped contact plate 5 is adhered to the adhesive layer 4 of the second sheet 3 to be integrated, thereby providing a spacer. A sheet with a contact plate is formed. (FIG. 11E)

According to the above configuration, the first sheet 3
Spacer sheets 50, 5 having through holes 50 a, 51 a on the lower surface side of the first and 41 for accommodating the second sheet 3.
1 is provided, and the top of the bulged portion of the dome-shaped contact plate 5 is stuck to the adhesive layer 4 of the second sheet 3 and held through the through holes 50a and 51a, Since the peripheral surface of the contact plate 5 is covered with the spacer sheets 50 and 51, invasion of foreign matter such as dust from around the contact plate 5 can be reduced, and contact reliability of the contact portion can be improved. You can do it.

An adhesive layer 44 is formed on the spacer sheets 50 and 51, and the adhesive sheet 44 is provided on the lower surface side of the first sheet bodies 31 and 41.
Since 0 and 51 are attached, assembling workability becomes easy and cost reduction can be achieved.

In the configuration with a spacer sheet, the space sheet 50 and the second sheet 3 are formed simultaneously on the same second sheet body 33 by half-cutting.
There is no need to separately prepare a sheet body for the spacer sheet, the number of components can be reduced, and processing and assembly can be facilitated.

The sheet with the contact plate includes the contact plate 5
May be covered with a slightly adhesive protective sheet or interlayer paper. In this case, the sheet with the contact plate is fixed to the fixed contacts 7 and 9.
Since dust can be prevented from entering the contact plate 5 until it is mounted on the contact boards 6 and 8 on which the contact portions are formed, the contact reliability of the contact portions is further improved.

[0048]

As described above, in the sheet with the contact plate of the present invention, the first surface having the upper surface serving as the contact surface of the key top.
And a contact plate having a swelling portion and disposed on the lower surface side of the first sheet, and a second sheet formed of a base material smaller than the contact plate and having an adhesive layer on one surface. The top of the bulging portion of the contact plate was stuck to the adhesive layer of the second sheet, and the other surface of the second sheet was stuck to the lower surface of the first sheet via an adhesive and held. Therefore, the protrusion for pressing the top of the dome-shaped contact plate is formed of a sheet-shaped base material smaller than the contact plate, and the bulging portion top of the contact plate is also held by the sheet-shaped base material. The pressing force of the key top can be reliably transmitted to the top of the contact plate.

Since the adhesive is applied to the lower surface of the first sheet, it is not necessary to provide the adhesive on the surface to be adhered of the second sheet. In addition, the processing can be easily performed without the adhesion of the adhesive to the tool and the like, and the handling of the remaining portion of the blanking can be easily performed.

A first sheet having an upper surface serving as a contact surface of a key top, a contact plate having a bulging portion and disposed on a lower surface of the first sheet, and a contact plate smaller than the contact plate. A second sheet formed of a base material and having an adhesive layer on both sides,
Since the top of the bulging portion of the contact plate was attached to one adhesive layer of the second sheet, and the other adhesive layer of the second sheet was attached and held on the lower surface side of the first sheet, An area outside the outer shape of the second sheet of the contact plate is not adhered to the first sheet, and the reversing operation is not hindered even for a small contact plate having a narrow pressing operation range. Operation feeling is obtained.

A spacer sheet having a through hole for accommodating the second sheet is provided on the lower surface side of the first sheet, and the contact plate is attached to the adhesive layer of the second sheet through the through hole. Since the peripheral surface of the contact plate is covered with the spacer sheet, the intrusion of foreign matter such as dust from the periphery of the contact plate can be reduced, and the contact reliability of the contact portion can be improved. it can.

Also, an adhesive layer is formed on the spacer sheet,
Since the spacer sheet is adhered to the lower surface side of the first sheet by this adhesive layer, the assembling workability is facilitated and the cost can be reduced.

Further, the contact plate is formed in a reversible dome shape, and the outer shape of the second sheet is 以下 or less of the outer shape of the contact plate, and the thickness is 80% or more of the reversing movement amount of the contact plate. With such a configuration, a good operation feeling can be obtained even for a small contact plate having a narrow pressing range.

Further, a sheet with a contact plate comprising any one of the first to sixth means, and a contact board on which the fixed contacts are provided, wherein the sheet with the contact plate is provided on the contact board on which the fixed contacts are provided The contact plate is adhered to the upper surface of the first sheet with an adhesive so as to face the fixed contact, and the key top for pressing is arranged on the upper surface side of the first sheet. Even if there is a displacement between the contact plate and the sheet with the contact plate, a good operation feeling can be obtained because the pressing force of the key top can be reliably transmitted to the top of the dome-shaped contact plate. Can be.

Further, the second sheet body having an adhesive layer formed on one side of the base material and provided with a release sheet so as to cover the adhesive layer is half-cut into a predetermined shape while leaving the release sheet. The remaining substrate having a shape other than the above shape is peeled off to leave a small second sheet on the release sheet, and this second sheet is attached to the pressure-sensitive adhesive forming surface of the first sheet body coated with the pressure-sensitive adhesive. And the peeling sheet was peeled off from the second sheet to expose the adhesive layer, and the top of the bulging portion of the dome-shaped contact plate was adhered to and integrated with this adhesive layer. Since the second sheet of small pieces is attached to the adhesive applied to the lower surface so as to transfer the small sheet, the second sheet of small pieces can be easily and reliably attached to a predetermined position. Further, since an adhesive for attaching the second sheet is formed on the lower surface side of the first sheet on the first sheet side, it is necessary to provide an adhesive on the surface to be adhered of the second sheet. Therefore, at the time of punching for half-cutting into a predetermined shape, the adhesive can be easily adhered to a tool or the like without adhering to the tool, and the remaining punching can be easily handled.

Further, a second sheet body having an adhesive layer formed on both sides of the base material and a release sheet provided so as to cover one adhesive layer is half-cut into a predetermined shape while leaving the release sheet. Peeling off the remaining base material other than the predetermined shape, leaving a small second sheet on the release sheet, attaching the second sheet to the first sheet body via the other adhesive layer,
Since the release sheet was peeled off from the second sheet to expose one of the adhesive layers, and the top of the bulging portion of the dome-shaped contact plate was attached to and integrated with this adhesive layer, the first sheet was Since the second sheet of small pieces is pasted and formed via the adhesive layer so as to be transferred, the second sheet of small pieces can be easily and reliably attached to a predetermined position. Further, the area outside the outer shape of the second sheet of the contact plate is not attached to the first sheet, and the reversing operation is not hindered even for a small contact plate having a narrow pressing operation range. , Good operation feeling is obtained.

[Brief description of the drawings]

FIG. 1 is a plan view showing a sheet with a contact plate according to an embodiment of the present invention.

FIG. 2 is a plan view showing a swelled state when the sheet with a contact plate according to the present invention is mounted on a contact substrate.

FIG. 3 is an exploded perspective view showing a sheet with a contact plate for a plurality of keys and a contact board according to the present invention.

FIG. 4 is an exploded perspective view showing a sheet with a contact plate for a single key and a contact substrate according to the present invention.

FIG. 5 is an explanatory view showing a manufacturing process of the sheet with a contact plate of the present invention.

FIG. 6 is a plan view showing a sheet with a contact plate according to another embodiment of the present invention.

FIG. 7 is an explanatory view showing a manufacturing process of a sheet with a contact plate according to another embodiment of the present invention.

FIG. 8 is a plan view showing a contact plate sheet provided with a spacer sheet of the present invention.

FIG. 9 is an explanatory view showing a manufacturing process of a contact plate sheet provided with a spacer sheet of the present invention.

FIG. 10 is a plan view showing another embodiment of the contact plate sheet provided with the spacer sheet of the present invention.

FIG. 11 is an explanatory view showing a manufacturing process of another embodiment of the contact plate sheet provided with the spacer sheet of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st sheet 2 Adhesive 3 2nd sheet 4,44 Adhesive layer 5 Contact plate 6,8 Contact board 7,9 Fixed contact 7a, 9a Peripheral fixed contact 7b, 9b Central fixed contact 10,60 Peeling sheet 11, 21, 31, 41 First sheet body 13, 23, 33, 43 Second sheet body 20 Key top 50, 51 Spacer sheet 50a, 51a Through hole 61 Spacer sheet body

Claims (9)

[Claims] 1. A first sheet having an upper surface serving as a contact surface of a key top, a contact plate having a bulging portion and disposed on a lower surface of the first sheet, A second sheet formed of a small substrate and having an adhesive layer on one side,
The top of the bulging portion of the contact plate is attached to the adhesive layer of the second sheet, and the other surface of the second sheet is attached to the lower surface of the first sheet via an adhesive. A sheet with a contact plate, characterized in that it is held by holding. 2. The sheet with a contact plate according to claim 1, wherein the adhesive is applied to a lower surface of the first sheet. 3. A first sheet having an upper surface serving as a contact surface of a key top, a contact plate having a bulging portion and disposed on a lower surface of the first sheet, A second sheet formed of a small base material and having an adhesive layer on both sides,
The top of the bulging portion of the contact plate is attached to one adhesive layer of the second sheet, and the other adhesive layer of the second sheet is attached to the lower surface of the first sheet and held. A sheet with a contact plate, characterized in that: 4. The method according to claim 1, wherein the second sheet is provided on a lower surface side of the first sheet.
A spacer sheet having a through-hole for accommodating the sheet is provided, and the contact plate is attached to the adhesive layer of the second sheet through the through-hole and held. 4. The sheet with a contact plate according to any one of 3. 5. An adhesive layer is formed on the spacer sheet,
The sheet with a contact plate according to claim 4, wherein the spacer sheet is attached to a lower surface side of the first sheet by the adhesive layer. 6. The contact sheet is formed in a reversible dome shape, and the outer shape of the second sheet is 以下 or less of the outer shape of the contact plate, and the thickness of the second sheet is 80 times the reversing movement amount of the contact plate. %
The sheet with a contact plate according to any one of claims 1 to 5, wherein the sheet is formed as described above. 7. A contact provided with the sheet with a contact plate according to claim 1 and a contact substrate on which a fixed contact is provided, wherein the sheet with a contact plate is provided with a contact on which the fixed contact is provided. A switch device wherein an adhesive is attached to an upper surface of a substrate so that the contact plate faces the fixed contact, and a key top for pressing is arranged on an upper surface side of the first sheet. 8. A second sheet body having an adhesive layer formed on one surface of a base material and provided with a release sheet so as to cover the adhesive layer, is half-cut into a predetermined shape while leaving the release sheet, The pressure-sensitive adhesive forming surface of the first sheet body on which the pressure-sensitive adhesive is applied is peeled off by removing the remaining base material other than the predetermined shape to leave a small second sheet on the release sheet. And peeling off the release sheet from the second sheet to expose the adhesive layer, and affixing the top of the bulging portion of the dome-shaped contact plate to the adhesive layer to be integrated. Manufacturing method of sheet with contact plate. 9. A second sheet body in which an adhesive layer is formed on both surfaces of a base material and a release sheet is provided so as to cover one of the adhesive layers is half-cut into a predetermined shape while leaving the release sheet. Removing the remaining base material other than the predetermined shape to leave a small second sheet on the release sheet;
Is adhered to the first sheet via the other adhesive layer, the release sheet is peeled off from the second sheet to expose one adhesive layer, and a dome-shaped contact plate is formed on the adhesive layer. A method for manufacturing a sheet with a contact plate, wherein the top of the bulging portion is adhered and integrated.