Keyboard |
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| 申请号 | JP18520184 | 申请日 | 1984-09-03 | 公开(公告)号 | JPS6162117A | 公开(公告)日 | 1986-03-31 |
| 申请人 | Brother Ind Ltd; | 发明人 | SUZUKI MAKOTO; TAKAGI TAKEYUKI; | ||||
| 摘要 | PURPOSE: To facilitate the operation and to realize the reduction of weights and assembly processes by molding the cover of key top surface in curvature shape by molding the upper cover as monobloc so that the stem guides pitch to radial direction. CONSTITUTION: In the molding of case, a fixed metal pattern 82 is molded so that it accords with the upper surface of an upper case 12, while a movable metal pattern 84 is molded so that it accords with the rear surface of the case 12. Also a sliding metal pattern 86 is placed on the metal pattern 84 so that it can move towards radial direction to mold supporting holes on a stem guide 30. In the situation that this metal pattern 86 is advanced towards the radial direction, the metal patterns 82 and 84 are matched together, and melted resin is injected inside the patterns 82 and 84 through a spool 88 of the pattern 82. By this process, a key disposition board 26 is molded with curve so that an envelope 50 can maintain specified curvature rate, and at the same time the guide 30 is molded with a pitch towards the radial direction. By these process, the covering surface 50 of each top surface of a key operational part material 42 is easily molded in curved shape, facilitating the operation and reducing volume and assembly process. COPYRIGHT: (C)1986,JPO&Japio |
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