| 摘要 |
A ball ramp mechanism constituting a force transmission converting mechanism is inserted into a cylinder of a caliper body and a relative rotation angle thereof is restricted to a predetermined range. Further, by successively assembling a piston head, a ramp plate and a ball and a screw shaft member constituting the ball ramp mechanism, a coil spring and an end plate in this order and by catching the end plate by a slit of a piston case in a state of flexing the coil spring, respective parts are elastically connected and assembled by the spring.
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