| 摘要 |
<p>A conical surface (72), provided at one end of a cone body (70), is slidably received in the through hole of a sliding board (50). The conical surface corresponds to the inclines (621) of sliding blocks. A door-opening spring (80) is tensioned between a housing (20) and the sliding board. The cone body is arranged at one end of a sliding body (30).</p> |
