| 摘要 |
A backset of a door locker is provided to reduce the manufacturing cost by reducing the number of component and to make the configuration of inside simple. A backset of a door locker comprises a dead bolt(21), a latch holder, a motor unit(10), and a gear pressure spring(13). The latch holder slides between a dead cam and a latch cam and is connected with the dead cam and the latch cam. The motor unit rotates a worm gear(11) using the power source. The gear pressure spring surrounds a gear pressure pin(12a). The one end of the gear pressure spring is connected to the thread of the worm gear around the gear pressure pin. The one end of the gear pressure spring is moved to top and bottom in the worm gear rotation along the thread. The dead cam and the latch cam are connected and operated by sliding the latch hole by pressing the other end of the gear pressure spring with a gear pressure roller(12b).
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