| 摘要 |
Abstract The present invention comprises a hand-cranked window protection chain lock which comprises a lock cavity and a chain disposed inside the lock cavity; the chain is driven by a driving member to extend and retract inside the lock cavity; the 5 lock cavity hinges on a chain hook which is used to restrict the movement of the chain; the chain hook hinges on the lock cavity by means of a chain hook pressing nail; a moving end of the chain hook extends a ramp-like protrusion block in the direction of the chain; at the position where the back of the moving end of the chain hook and the back of the protrusion block face each other, a compressed 10 elastic member is disposed; when the elastic member returns, the protrusion block is pressed into the gap between the neighboring pin shafts of the chain; the protrusion block is pulled out from the gap between the pin shafts during the compression of the elastic member; a lock cylinder with an eccentric shaft is also provided on the lock cavity; the eccentric shaft on the lock cylinder is inclined and 15 in contact with one face of the protrusion block extended from the chain hook; when the lock cylinder drives the eccentric shaft to rotate, the eccentric shaft compresses or releases the chain hook, thereby completing the action, in which the protrusion block is pulled out or pressed in between the pin shafts, together with the elastic member; the advantage of the present invention is that it 20 comprises a simple structure and can lock the window effectively. |
