JPS6327394Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a key switch installed in, for example, an electronic desktop calculator, and particularly relates to a mounting structure for a double key.

Conventionally, in electronic desktop calculators, etc., the so-called double key mounting structure, in which two keys are combined into one key, has a switch mounted in one of two adjacent mounting holes provided on the key plate. A key guide supporting one side of the key top was separately attached to the main body, and the key guide was attached to the tip of the key guide to form a double key. but,
The key mounting hole of the key plate is set to have a hole dimension slightly larger than the mounting dimension of the component due to processing accuracy and component dimensional accuracy. On the other hand, since the key top that connects the key switch body and the key guide is made by molding or the like, the intervals between the mounting holes for mounting the key switch and the key guide have a predetermined dimensional accuracy. Therefore, when installing the switch body and key guide, simply installing them in the mounting holes will result in poor dimensional accuracy in the installation distance between the two.
It is difficult to attach the key top as it is, and it is troublesome to adjust the installation distance between the switch body and the key guide each time to attach the key top, and such adjustments have the disadvantage of increasing costs. Ta.

The present invention eliminates the above-mentioned drawbacks and will be explained below with reference to an embodiment shown in the drawings. Reference numeral 1 denotes a key plate, and this key plate 1 is made of an iron plate with mounting holes for a required number of key switches formed by pressing or the like. 3 is a switch body, and 4 is a key guide, which supports one side of the key top, and is attached to the key plate 1, respectively.
Reference numeral 5 designates a key top, and in this embodiment, the key switch 3 and key guide 4 are mounted on the same key top, forming a so-called double key. 6 is a printed wiring board to which the key switch terminals are soldered. Reference numeral 7 denotes a seat plate, and the key switch main body 3 and the key guide 4 are integrally molded in order to set the mutual positions of the key switch main body 3 and the key guide 4, that is, the mounting pitch. When assembling these parts, the key switch body 3 and the key guide 4 are connected to the seat plate 7 and are integrally formed, so they are inserted into the predetermined mounting hole 2 of the key plate 1 from above, and the hook claws 8 and 9 are inserted. Attach against elastic force. When installation is complete, the key switch body 3 and key guide 4 are attached to the seat plate 7.
It is clamped and attached between the hook and hook. At this time, since the mounting hole 2 is set slightly larger than the mounting dimensions of the key switch body 3, etc., the key switch body 3 and key guide 4 can be installed at the mounting positions (distance between the two points) without any problem. I can do it,
Moreover, since the two are integrally formed,
The key top 5 can be easily mounted because the mounting pitch between the mounting shaft of the key switch body 3 and the mounting shaft of the key guide 4 maintains a predetermined pitch.

Therefore, since the switch body 3 and the key guide 4 are integrally molded with the seat plate 7 in between,
They used to be treated as individual parts and assembled individually, but using them as one part improves work efficiency, and since they are integrally molded, the key switch body 3's mounting shaft and key guide Since the pitch of the mounting shaft is maintained at the required dimensions (corresponding to the key top mounting hole pitch), the key top can be easily mounted, and there is an advantage that there is no need to adjust the mounting accuracy as in the conventional case. In particular, 2
When a double key consists of a key switch body on one side and a key guide that supports one side of the key top on the other side, if the installation pitch is not accurate, the key may not operate smoothly. are doing. In other words, the key presses do not move in parallel between the two, requiring strong pressure, which may result in failure to repeat the key. Therefore, if the mounting pitch is accurately maintained as in the present invention, all of the above-mentioned disadvantages can be overcome.

[Brief explanation of the drawing]

FIG. 1 is a side view of essential parts of a key switch showing an embodiment of the present invention, and FIG. 2 is a plan view of a key plate. In the figure, 1 is the key plate, 2 and 2' are the mounting holes,
3 is a switch body, 4 is a key guide, 5 is a key top, and 7 is a seat plate.

Claims (1)

[Scope of utility model registration request] A washer having two mounting holes arranged at a predetermined interval, a switch body that is mounted in one of the mounting holes of the washer with the mounting shaft facing upward, and a switch body that is mounted with the mounting shaft facing upward in the other of the mounting holes of the washer. A key guide to be mounted, a key plate to which the washer is integrally mounted to two required mounting holes of a plurality of mounting holes via the switch main body and the key guide, and a mounting shaft of the switch main body and the key. A key switch consisting of a key top that is integrally inserted into the guide mounting shaft and fixed.