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77. 发明专利

JPS57181883A COMPACT PRINTER 失效
公开(公告)号：JPS57181883A
公开(公告)日：1982-11-09
申请号：JP6705781
申请日：1981-05-06
申请人： CANON DENSHI KK
发明人： WATANABE SATOSHI , HIRANO HIROFUMI , SASAKI SETSUO , KIMURA TAKESHI
IPC分类号： B41J3/36 , B41J1/32 , B41J7/48
摘要： PURPOSE:To obtain the compact printer wherein the contact points of lead switches are opened and closed by permanent magnets which are fixed to a gear that is associatively moved with a type wheel, the timing signal generating mechanism constituted by the lead switches is provided, and eroneous operation is not caused by paper powder, oily dirt, and the like. CONSTITUTION:A rotary plate 156 is rotated by gears 156a and 156b which are engaged with a gear 52 provided on the side face of the type wheel. The timing signal generating mechanism is constituted by permanent magnets 157a and 157b, which are provided on the side surface of the rotary plate 156 and lead switches L1 and L2. The lead switches L1 and L2 are fixed on the same circumference in a lead switch attaching box 54 attached to a side plate 3 in the vicinity of the gear 52 under the state they are separated by 90 degrees in the circumferential direction. The switches generate the timing signal corresponding to the odd number digits and the even number digits of the type belt.

78. 发明专利

JPS57176190A SMALL-SIZED PRINTER 失效
公开(公告)号：JPS57176190A
公开(公告)日：1982-10-29
申请号：JP6127681
申请日：1981-04-24
申请人： CANON DENSHI KK
发明人： NISHIKAWA TATSUO , YOSHIDA SHIGERU , KIMURA TAKESHI , TAKAHASHI TERUAKI
IPC分类号： B41J3/36 , B41J7/48 , B41J23/04 , B41J27/14 , B41J29/38
摘要： PURPOSE:To attain a cheaper printer capable of performing precise printing with simplified structure by a construction wherein rotation of a motor is transmitted to a font drum via a spring clutch. CONSTITUTION:A pinion gear 25 is fixed to the distal end of an output shaft of a motor 13 and a gear 26 is in mesh with the pinion gear 25. One end of a coil spring 29 is fixed to the side of the gear 26, while a hook portion 29a at the other end thereof is engaged with a tubular member 28. Thus, when rotating force is transmitted in such a direction that the spring 29 is wound round a shaft portion of the gear 26, the gear 26 transmits the rotating force of the motor 13 to the font drum via the pinion gear 25 and the tubular member 28. By so doing, the motor 13 is continuously rotated even when the drum is stopped, thus eliminating a need of rotating the motor itermittently each when the drum is subject to intermittent rotation. As a result, it becomes possible to adopt brush type micromotors of cheaper cost.

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