| 摘要 |
<p>A multipoint locking unit comprising drive means and a pair of pivotal locking bolts/hooks 20a, 20b, which rotate between a retracted position and an extended position. Preferably the locking unit has a primary set of locking bolts and a first and second secondary set of locking bolts (4, 6, 8, fig.2) each consisting of a pair of locking bolts/hooks. The locking unit may be of the espagnolette type having a first and second drive bars driven in opposite. The locking elements may have an engagement portion for cooperating with a keeper and have a toothed body portion driven by drive arms/bar 42, 44 driven in opposite directions via rack and pinions, ultimately driven via toothed cam 36 connected to a handle. The locking bolts in each pair may rotate in opposite directions such that one locking bolt rotates clockwise and the other rotates anti-clockwise. The locking elements may be flush with a surface of a lock casing in the retracted position. Additional locking bolts may be provided as shootbolts (212) and sliding locking pins (208) as corner locking units on a second and third edge of the window (figs. 17-22).</p> |
