JPH056588U - Keep-up - Google Patents

Abstract

(57) [Summary] [Object] To provide a key top for pressing and driving a tact switch, which has a switching stroke larger than the switching stroke of the tact switch. [Structure] The key top 4'is integrally provided with a J-shaped elastic leg piece 43 'whose tip abuts on a substrate 2 on which the tact switch 1 is mounted and fixed and which provides a gap S between the key top 4'and the tact switch 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a key top used for an operation panel switch of FA equipment and OA equipment.

[0002]

[Prior Art]

 5 to 8 show an operation panel switch constructed by using a conventional key top. In the figure, 1 is a tact switch fixed on the substrate 2 by soldering, and 3 is a panel case arranged above the substrate 2 in parallel therewith. A square hole 31 is provided at a position of the panel case 3 facing the tact switch 1, and a rectangular key top 4 is fitted in the square hole 31 so as to be vertically movable. In the key top 4, the protrusion 41 at the center of the lower surface abuts on the operating portion 11 of the tact switch 1, and the flanges 42 on both lower side surfaces engage with the both side edges of the lower surface of the square hole 31 of the panel case 3 so that the square hole 31 comes out. It is locked out. On the upper surface of the key top 4, a normal switch function is displayed by means such as printing.

The panel switch thus configured is normally in the state shown in FIG. 7, and from this state, when the key top 4 is pressed and the operating portion 11 of the tact switch 1 is pushed down as shown in FIG. , The switch is turned on. When the pressing of the key top 4 is released, the operation portion 11 and the key top 4 are pushed up by the action of the spring inside the tact switch 1, and the state returns to the state of FIG. 7 and the switch is turned off.

[0004]

[Problems to be solved by the device]

 As described above, the conventional key top 4 used for the panel switch using the tact switch has a structure in which it is always in contact with the operating portion 11 of the tact switch 1 and operates together, and the stroke of the key top 4 is the operating portion 11 of the tact switch 1. It depends on the switching stroke of. Generally, the switching stroke of the operation unit 11 of the tact switch 1 is extremely short. Therefore, the conventional panel switch using the key top 4 has a problem that the stroke of the key top 4 is the same as the switching stroke of the key top 4 and is extremely short, and the feeling of the switching operation is not very good.

Therefore, an object of the present invention is to eliminate the above-mentioned conventional drawbacks and to provide a key top that can obtain a large switching stroke regardless of the stroke of the operating portion of the tact switch.

[0006]

[Means for Solving the Problems]

 According to the present invention, in a key top for driving a tact switch fixed on a substrate from above, a J-shape that abuts the key top on the substrate to provide a gap between the key top and the tact switch. The key top is obtained by integrally providing the elastic leg pieces of.

[0007]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a key top 4'according to the present invention. The key top 4'is a rectangular block body made of a synthetic resin material, and a projection 41 'similar to the conventional one is provided on the lower surface central portion thereof. Also, two prismatic flanges 42 ', 42' are provided in parallel on both sides of the lower surface thereof, and both ends thereof project outwardly on both side surfaces of the key top 4 '. J-shaped leg pieces 43 'and 43' extending downward are integrally provided at both ends of one flange 42 '. The leg pieces 43 ', 43' are provided so as to be elastically deformable.

2 to 4 show a panel switch into which the keytop 4'of the present invention constructed as described above is incorporated. In the figure, 1 is a tact switch fixed on the substrate 2 by soldering, and 3 is a panel case arranged above the substrate 2 and in parallel therewith. The panel case 3 has a square hole 31 at a position facing the tact switch 1, and a rectangular key top 4'is fitted in the square hole 31 so as to be vertically movable as in the conventional case. Here, in the key top 4 ', the lower ends of the leg pieces 43', 43 'are elastically brought into contact with the substrate 2, and the flanges 42', 42 'are engaged with both side edges of the lower surface of the square hole 31 of the panel case 3. It is supported by the stopper 41, and a gap S (see FIG. 3 (a)) is provided between the protrusion 41 'and the operating portion 11 of the tact switch 1.

The panel switch thus constructed is normally in the state shown in FIG. 3, and when the key top 4'is pressed from this state, the key top 4'is lowered while bending the leg pieces 43 ', 43'. Then, when the distance S is pushed down, the protrusion 41 ′ comes into contact with the operating portion 11 of the tact switch 1. When the state of FIG. 4 is depressed by depressing the key tops 4'for the switching stroke of the operation unit 11, the switch is turned on. Excluding the pressing on the key top 4 ′, the operating portion 11 and the key top 4 ′ are pushed up by the spring inside the tact switch and the elastic restoring force of the leg pieces 43 ′ and 43 ′, respectively, and the state returns to the state of FIG. 3 and the switch is turned off. Becomes

[0010]

[Effect of the device]

 As described above, the key top of the present invention has the J-shaped elastic leg pieces that are elastically contacted with the substrate and provide the gap S between the key switch and the operation portion of the tact switch. Therefore, in addition to the stroke of the operation portion of the tact switch, Further, a stroke corresponding to the gap S can be given, and a panel switch with a large switching stroke can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a key top of the present invention.

FIG. 2 is a perspective view of a panel switch configured by using the key top of FIG.

3A and 3B are a side view and a front view of FIG.

FIG. 4 is a side view showing a state where the key top is pushed down from the state of FIG. 3 (a).

FIG. 5 is a perspective view of a panel switch configured using a conventional key top.

6 is an exploded perspective view of FIG.

FIG. 7 is a side view of FIG.

8 is a side view showing a state where the key top is pushed down from the state of FIG. 7.

[Explanation of symbols]

 1 Tact switch 2 Board 3 Panel case 4, 4'Key top 43 'Leg piece

Claims (1)

[Claims for utility model registration] 1. In a key top for driving a tact switch fixed on a substrate from above, a gap is provided between the key top and the substrate by contacting the substrate. The key top is characterized in that it is integrally provided with J-shaped elastic leg pieces that give the.