| 摘要 |
<p>The cage has a body (10) comprising two basic faces (11, 12). A cavity (15) is formed in the body. A mounting unit (30) mounts a leg (21) in the cavity around a rotation axis (16) parallel with a plane of the basic faces between a position, in which the leg is entirely contained in the cavity, and another position, in which a part of the leg is emerged from the cavity. The mounting unit comprises a cylindrical crossing opening (34) in a shaft (31) such that an axis of the shaft is arranged with the rotation axis, where a cross section (35) of the opening is in polygonal shape.</p> |
