To achieved a structure wherein there is adopted a link type force multiplication device that causes only a small transmission loss, wherein, as a result, miniaturization and weight saving can be brought about by using an electric motor with a relatively small output, and wherein, in addition, reaction force accompanying braking is offset in the force multiplication device, with the result that no large force is applied to the connection between the force multiplication device and a back plate 1.
A connection link 25, a strut 11c, and both first and second extension levers 26, 27 constitute an extension and retraction device 23. During braking, the base ends of both these levers 26, 27 are pressed in opposite directions to each other by both first and second pressing members 34, 33 which are constituted of a driving device 24. Reaction force accompanying braking is offset in the connection link 25 section, with the result that no large force is applied to the back plate 1 or the like.
IKEGAMI HIROSHI
KAKIZAKI HIDENORI
TSUJIKU HARUO
MAEHARA TOSHIFUMI
| JPS5824625A | 1983-02-14 | |||
| JPS3929510Y1 | ||||
| JPS5199276U | 1976-08-09 | |||
| JPH09177841A | 1997-07-11 | |||
| JPH08244596A | 1996-09-24 | |||
| JP2003028215A | 2003-01-29 |
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