| 摘要 |
<p>A footrest part (3) comprises a coiled spring for biasing the footrest part (3) to the seat side, a positioning mechanism for positioning the footrest part (3) in such a state that it is not returned from an adjusted position to the seat side, and a release mechanism for releasing the state of the footrest part positioned by the positioning mechanism. The release mechanism is operated by the sole of the foot of a user put on the footrest part (3).</p> |
