| 摘要 |
This invention relates to a slip clutch mechanism for a door. More specifically, the invention relates to a security device in the form of a slip clutch mechanism for coupling and decoupling an exterior door handle to or from a lock mechanism under different loading conditions. The slip clutch mechanism includes a first engaging member for connecting a control handle and a lock mechanism and a second engaging member for connecting to a slave handle. The first and/or second engaging members are at least partially resiliently deformable such that the first and second engaging members are resiliently deformable with respect to one another between a coupled condition and a decoupled condition, dependent on the force difference applied on the slave and control handles. In the coupled condition, the first and second engaging members are correspondingly engageable to move in unison so as to transfer rotational movement of the slave handle to the look mechanism. In the decoupled condition, the first and second engaging members, through relative deformation, slip with respect to one another thereby preventing transfer of rotational movement of the slave handle to the lock mechanism. In this way, the locking mechanism is capable of being actuated by the control handle at all times, while the slave handle only in the event giving rise to the coupled condition. |
