| 摘要 |
A fuel cap has a cap main body, a cover with a handle, and a torque mechanism. The torque mechanism includes a torque transmission unit and click units. In response to a rotation of the handle in a closing direction, a rotational torque is transmitted from a torque transmission rib to a cantilever spring in the torque transmission unit of the torque mechanism. The cantilever spring is elastically deformed by rotation of the cover in the closing direction to transmit the rotational torque, while accumulating a spring force. After accumulation of the spring force to or over a predetermined level, in response to a relative rotation of the cover to the cap main body by at least a preset angle, the click units give a click sound. When the user releases the hold of the handle, the accumulated spring force of the cantilever spring works to restore the click units to their initial positions. The cap device of the invention has the torque mechanism that has the simple structure and consists of a less number of parts to give a click.
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