| 摘要 |
PROBLEM TO BE SOLVED: To arbitrarily, inexpensively design good crick feeling without a complex energizing mechanism or a rubber spring, by providing first and second cam portions formed in first and second movable link members for guiding a key top upward or downward under the key top, and an elastic member formed in these for energizing both cam portions in the contact direction. SOLUTION: First and second cam portions 24, 35 integrally formed with plate springs 20, 31 placed at respective connecting portions of respective pairs of gear-engaged plate-shaped bodies 18, 29 in first and second link members 3, 4 locked on the rear surface of a key top 2 have first and second cam surfaces 25, 26 on the lower side and the upper side. When the key top 2 is not pressed down, first cam surfaces 25 abut to each other, backlash does not occur thanks to an energizing force applied by the plate springs 20, 31. When the key top 2 is pressed down, a projecting strip part and a recessed groove of both cam tops 27 inter-engage, second cam surfaces 26 finally abut to each other, resin elastic pieces 24A, 35A at the lower ends simultaneously abut to the upside film sheet to prevent chattering. When the pressing is cancelled, they are returned with the energizing force by the plate springs 20, 31.
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