To provide an output mechanism which transmits larger power more safely than the other technology by employing a novel system for operating a caliper which utilizes slides of helical gears, through a hydraulic type using a cylinder and a piston, an air-pressure type which uses air pressure in the air chamber and operates on the principle of a fulcrum, or an electric type which uses electricity and operates by a planetary gear and a ball screw by using the rotation of a motor is generally used as a system for operating the caliper of a disc brake.

The mechanism can simultaneously convert slight rotating movement into lateral linear movement. As a means for the mechanism, the helical gears are assembled in multiple stages, and thereby the movement can simultaneously be transmitted to right and left in the linear direction by slight rotation in a constant direction by utilizing the slides of the helical gears. Furthermore, since the helical gears have large rigidity, a large power can be transmitted. This mechanism is most suitable for the caliper of the disc brake which requires a large compression force.

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