| 摘要 |
PROBLEM TO BE SOLVED: To provide a push-button switch member, in which the bottom surface portion of each key top is flat, at the same time, the thickness of a base is thin and which has an excellent outer appearance. SOLUTION: Between a pair of molds consisting of a cavity side mold having recessed parts for a key top 3 and a core side mold, a resin sheet 5 having projected parts for the key top 3 disposed in upright from a base part 2 is arranged. When key tops 3 are formed by injecting molten resin between the resin sheet 5 and the core side mold, small projected parts 12 adjacent to respective projected parts for the key top 3 are disposed in upright in the base part while recessed parts for the small projected part 12 are provided in the cavity side mold. On the core side mold, flat bottom surface 3a forming surfaces are provided and, at the same time, the outlets of gate parts opening from the bottom surface 3a forming surface opposite to the interior of the recessed parts for the small projected part 12 are provided so as to charge molten resin injected from the outlets of the gate parts in the small projected parts 12 through resin passages into the projected parts for the key top 3. COPYRIGHT: (C)2004,JPO
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