| 摘要 |
A key switch device having an increased strength and a decreased thickness, and produced at a decreased cost yet offering good operation feeling. The key switch device 11 has a key top 13 mounted on a base plate 12 via a rubber spring 16 so as to be freely lifted and lowered, and the switching operation is effected upon depressing the key top 13, wherein a small link member 14 and a large link member 15 are provided between the base plate 12 and the key top 13 so as to turn at right angles without contacting to each other, the lower ends of the small link member 14 are slidably fitted into slide guides 12a and 12b formed in the base plate 12, the upper ends thereof are supported by bearing portions with slit 13a and 13b provided at the lower ends of the key top 13, the lower ends and the upper ends of the large link member 15 are supported by the bearing portions with slit 12c, 12d, 13c and 13d provided on the base plate 12 and at the lower ends of the key top 13, and the key top 13 is supported by the rubber spring 16, by the small link member 14 and by the large link member 15 so as to be freely lifted and lowered.
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