| 摘要 |
<p>PROBLEM TO BE SOLVED: To lower the component cost and assembly cost by forming a key top and an upper cover in one body. SOLUTION: Two-three depression levers 62 used as key tops are molded integrally with the upper cover 61, the root parts are connected to the cover 61, and the depression covers 62 have depression ribs 63 on their reverse surfaces. Those ribs 63 are arranged right above push-button switches 51 mounted on a printed board 53 respectively and when the free end side of a lever 62 is pressed, the intermediate part of the lever 62 bends to press the push-button switch 51 through the depressed rib 63. Thus, the depression lever 62 whose root part molded integrally with the upper cover 61 is coupled with the upper cover 61 is used as the key top to eliminate the need for the cost for forming the key top separately and the cost for combining the key top and cover 61 together after the molding.</p> |
