JPH08298045A - Panel switch - Google Patents

Abstract

PURPOSE: To provide a thin panel switch with satisfactory click touch using a button sheet of flat structure having no projection. CONSTITUTION: A film button sheet 15 having a strip pressing part 17 orthogonal to a center tape 13 put between an adhesive tape 12 and the center of a metal diaphragm 11 is arranged on the metal diaphragm 11, so that the part of the center tape 13 crossing the strip pressing part 17 pushes down the center part of the metal diaphragm 11 without interrupting the displacement accompanied by the repulsion of the metal diaphragm 11. Thus, a thin panel switch which ensures the continuity of a contact and has a satisfactory click touch can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel switch in which a film-shaped button sheet having a strip-shaped pressing portion is arranged on a metal diaphragm.

[0002]

2. Description of the Related Art In recent years, operating panels of products such as portable wireless communication devices, which are becoming thinner and thinner, use a metal diaphragm as a movable contact, and a button sheet is provided so as not to prevent displacement caused by the repulsive force of the metal diaphragm. In addition, thin panel switches with a good click feel are widely used.

A conventional panel switch will be described below. FIG. 5 shows the structure of a conventional panel switch. In FIG. 5, reference numeral 51 denotes a metal diaphragm, which is fixed to the fixed side contact pattern 55a on the insulating substrate 54 by an adhesive tape 52 so as to face the fixed side contact 55b. The center tape 53 is for preventing the adhesive of the adhesive tape 52 from entering the inside of the metal diaphragm 51 through the hole 59 which is opened in the center of the metal diaphragm 51 for improving the contact stability. When the button sheet 56 is pushed, the protrusion 57 pushes down the center of the metal diaphragm 51, and the metal diaphragm 51 is displaced due to the repulsive force.
The center portion of the contact point contacts the fixed side contact pattern 55b, so that the fixed side contacts 55a and 55b are electrically connected and a good click feeling is obtained. At this time, the protrusion 57 is formed on the metal diaphragm 51.
This does not hinder the displacement of the button sheet 56, and has the effect of allowing the button sheet 56 to be pressed even if it has a planar shape.

[0004]

However, in the above-mentioned conventional configuration, the button sheet 56 has a three-dimensional structure with the protrusions 57, and it is difficult to reduce the thickness, and a complicated die for molding is required. I had a problem.

An object of the present invention is to solve the above-mentioned conventional problems, and an object thereof is to provide a thin panel switch using a button sheet having a flat structure without protrusions and having a good click feeling.

[0006]

In order to achieve this object, the panel switch of the present invention is a film-shaped button sheet having a strip-shaped pressing portion orthogonal to the center tape sandwiched between the adhesive tape and the center of the metal diaphragm. Is arranged on the metal diaphragm.

[0007]

With this structure, since the button sheet having the strip-shaped pressing portion orthogonal to the center tape is arranged on the metal diaphragm, the intersection of the center tape and the strip-shaped pressing portion has the same function as the protrusion, that is, the metal. It is possible to provide a thin panel switch having a function of pushing down the central portion of the metal diaphragm without hindering the displacement of the diaphragm accompanied by the repulsive force and providing a reliable contact conduction and a good click feeling.

[0008]

【Example】

(First Embodiment) A first embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the metal diaphragm 11 is fixed to the fixed side contact 15a on the insulating substrate 14 by the adhesive tape 12 having the center tape 13 on the fixed side contact 15a.
It is fixed so as to face b. The film-shaped button sheet 16 is arranged on the insulating substrate 14, and is formed in accordance with the characteristics of the metal diaphragm 11 at the center position of the strip-shaped pressing portion 17 orthogonal to the center tape 13 and the intersection of the metal diaphragm 11. It has a bulge 18 whose height is adjusted. The button sheet 16 can be colored.

In this example, the dimensions of each part are as follows. Button sheet thickness 0.2mm Band-shaped pressing portion width 1mm Center position bulge diameter 1.5mm Center tape thickness 0.025mm Center tape width 2mm Panel switch configured as above
The operation will be described with reference to (b) and (c). First, when the bulge 18 of the band-shaped pressing portion 17 is pressed, the metal diaphragm 1
The center of the metal diaphragm 11 comes into contact with the fixed side contact 15b due to the displacement caused by the repulsive force by pressing the center of No. 1 and reliable contact between the fixed side contacts 15a and 15b and a good click feeling can be obtained.

As described above, according to the present embodiment, since the button sheet 16 can be manufactured by punching a single film, it is possible to press the button sheet 16 even if it is thin and has a planar shape.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, the metal diaphragm 21 is fixed to the fixed contact 25a on the insulating substrate 24 by the adhesive tape 22 having the center tape 23.
It is fixed so as to face b. The film-shaped button sheet 26 is arranged on the insulating substrate 24, and is provided with a strip-shaped pressing portion 27 which is orthogonal to the center tape 23 and whose intersection is the center of the metal diaphragm 21. The button sheet 26 may be colored.

The operation of the panel switch configured as described above will be described with reference to FIGS. 2 (b) and 2 (c). When the band-shaped pressing portion 27 of the button sheet 26 is pressed, the same operation as in the first embodiment is performed.

As described above, according to this embodiment, since the strip-shaped pressing portion 27 is connected to the whole at both ends thereof, it can be manufactured and manufactured.
The button sheet can be easily deformed during handling in the assembly process.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to the drawings.

In FIG. 3, the metal diaphragm 31 is fixed to the fixed contact 35a on the insulating substrate 34 by the adhesive tape 32 having the center tape 33.
It is fixed so as to face b. The film-shaped button sheet 36 is arranged on the insulating substrate 34 with the spacer 38 interposed therebetween, and is provided with a strip-shaped pressing portion 37 which is orthogonal to the center tape 33 and whose intersection is the center of the metal diaphragm 31. The button sheet 36 can be colored.

The operation of the panel switch configured as described above will be described with reference to FIG. When the strip-shaped pressing portion 37 of the button sheet 36 is pressed, the same operation as in the first embodiment is performed.

As described above, according to this embodiment, the spacer 38 absorbs the height of the metal diaphragm 31 so that the upper surface of the button sheet 36 becomes substantially flat, and the operation key sheet disposed on the button sheet 36. Can be smoothly combined with.

(Embodiment 4) A fourth embodiment of the present invention will be described below with reference to the drawings.

In FIG. 4, a film 4 having a hole 49 larger than the metal diaphragm 41 facing the fixed contact 45b is provided at the position of the fixed contact 45a by the adhesive tape 42 having the center tape 43.
It is fixed to 8. The film-shaped button sheet 46 has an adhesive treatment on the back surface, is provided with a band-shaped pressing portion 47 that is the center of the metal diaphragm 41, and is fixed on the film 48. Reference numeral 44 is an insulating substrate having fixed contacts 45a and 45b. The button sheet 46 can be colored.

The operation of the panel switch configured as described above will be described with reference to FIG. When the strip-shaped pressing portion 47 of the button sheet 46 is pressed, the same operation as in the first embodiment is performed.

As described above, according to this embodiment, the metal diaphragm 41 and the strip-shaped pressing portion 47 are integrally formed in the component manufacturing process, so that the mutual positional relationship can be fixed in a state in which the displacement is small. A good click feeling is stably obtained, and further, the film 48 has the same function as the spacer 38 of the third embodiment, and the flattening can be achieved at the same time.

[0024]

As described above, according to the present invention, by disposing the button sheet having the strip-shaped pressing portion orthogonal to the center tape on the metal diaphragm, the button sheet has a flat structure without protrusions, is thin, Moreover, it is possible to provide an excellent panel switch that can be easily deformed without being easily deformed, can be easily handled in the manufacturing / assembling process, and can be easily flattened, and that has a good click feeling.

[Brief description of drawings]

1A is an exploded perspective view of a panel switch according to a first embodiment of the present invention, FIG. 1B is a sectional view of the same, and FIG. 1C is a sectional view of the same when the switch is pressed.

2A is an exploded perspective view of a panel switch according to a second embodiment of the present invention, FIG. 2B is the same sectional view, and FIG. 2C is a sectional view when the switch is pressed.

FIG. 3A is an exploded perspective view of a panel switch according to a third embodiment of the present invention, and FIG. 3B is a sectional view of the same.

FIG. 4A is an exploded perspective view of a panel switch according to a fourth embodiment of the present invention, and FIG. 4B is a sectional view of the same.

FIG. 5A is a cross-sectional view of a conventional panel switch, and FIG. 5B is a cross-sectional view when the switch is pressed.

[Explanation of symbols]

11, 21, 31, 41 Metal diaphragm 12, 22, 32, 42 Adhesive tape 13, 23, 33, 43 Center tape 14, 24, 34, 44 Insulating substrate 15a, 15b, 25a, 25b, 35a, 35b, 4
5a, 45b Fixed side contact 16, 26, 36, 46 Button sheet 17, 27, 37, 47 Band-shaped pressing portion

Claims (3)

[Claims] 1. An insulating substrate having a fixed side contact, a metal diaphragm serving as a movable contact facing the fixed side contact, an adhesive tape for fixing the metal diaphragm to the insulating substrate, the adhesive tape and the metal. A panel switch comprising: a center tape sandwiched between the centers of diaphragms; and a button sheet provided on the adhesive tape, the button sheet having a strip-shaped pressing portion orthogonal to the center tape. 2. The panel switch according to claim 1, wherein a bulge is provided at a central position of the metal diaphragm of the strip-shaped pressing portion orthogonal to the center tape, and the size of the strip-shaped pressing portion is adjusted according to the characteristics of the metal diaphragm. 3. The panel switch according to claim 1, wherein the button sheet is colored.