| 摘要 |
<p>The locking key (110) is inserted into the end of one extruded section (112) and consists of a "U"-shaped fixed jaw (114) with downward pointing hooks (114c) along with a moving upper jaw (118) pivoted about two spigots, in holes (112d) in the U section of the fixed jaw. The moving jaw has upward facing hooks (118a). The moving jaw is operated against a return spring (126) by a cam (120) so that a 90 degree rotation moves the locking key from one extreme to the other. The key is retained in the section when the operating bolt head (120a) snaps into the hole (112c) under the action of the spring (126).</p> |
