| 摘要 |
<p>A fuel cap (10) has a cap main body (20), a cover (40) with a handle (42), and a torque mechanism (80). The torque mechanism (80) includes a torque transmission unit (82) and click units (84). In response to a rotation of the handle (42) in a closing direction, a rotational torque is transmitted from a torque transmission rib (44) to a cantilever spring (93) in the torque transmission unit (82) of the torque mechanism (80). The cantilever spring (93) is elastically deformed by rotation of the cover (40) 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 (40) to the cap main body (20) by at least a preset angle, the click units (84) give a click sound. When the user releases the hold of the handle (42), the accumulated spring force of the cantilever spring (93) works to restore the click units (84) to their initial positions. The cap device (10) of the invention has the torque mechanism (80) that has the simple structure and consists of a less number of parts to give a click. <IMAGE></p> |
