CN2418213Y - Locking device for door-lock - Google Patents

Abstract

The utility model discloses a locking device for a door lock, which is composed of a main lock and an auxiliary lock, wherein a positioning groove is arranged in a lock bolt of the main lock, and the auxiliary lock comprises a lock bolt, a lock rod, a restoring spring and a slipway. The restoring spring is sheathed on the lock rod and is arranged in the slipway, and the bottom end of the lock rod and the lock bolt form a sliding connecting pair. The top end of the lock rod can be inserted into the positioning groove of the lock bolt of the main lock, the lock rod is locked in the lock bolt of the main lock through the auxiliary lock, and thus, the lock bolt of the main lock can not move when the auxiliary lock is locked. The locking device adopts the structure of the main lock and the auxiliary lock and further locks the main lock through the auxiliary lock, and thus, the locking device has the three locking functions of the main lock, the auxiliary lock and the auxiliary lock to the main lock for theftproof doors. The utility model increases the safety coefficient of theftproof door and increases pry-proof performance.

Description

A kind of door lock locking device

The utility model discloses a kind of door lock locking device, relates to the machinery tight device technique field of locking a door.

Existing door lock is safe-guard door lock particularly, is by tapered end dead bolt to be shifted onto in the doorframe to fix, and makes door and doorframe spacing to reach the purpose of locking a door mutually, and its deficiency is by prizing other dead bolt, can being easy to security door is opened.

Task of the present utility model is to disclose a kind of door lock locking device, solves the problem that existing Door-lock bolt is pried open easily.

Task of the present utility model is achieved in that by main lock, secondary lock constitutes this device, wherein, have locating slot on the dead bolt of main lock, secondary lock comprises dead bolt, locking bar, back-moving spring, slideway, back-moving spring is enclosed within on the locking bar, device is in slideway, the bottom of locking bar and dead bolt are paid for being slidingly connected, the top can be inserted in the dead bolt locating slot of main lock, the dead bolt displacement of the main lock of control at first will be led during use and lock, and locking bar will be locked in the dead bolt of main lock by the pair lock again, make main being locked in pay lock and that dead bolt can't move under the situation of not opening, further prevented the unlatching of main lock.

Good effect of the present utility model is: adopt main lock, secondary lock construction, to lead further locking of lock by the pair lock, make this device have main lock, secondary lock and secondary lock triple lock functions, increased the safety factor of security door, improved the pick-proof performance main lock to security door.

Fig. 1 is the utility model structure principle chart.

Further describe the utility model below in conjunction with accompanying drawing:

In Fig. 1, master's lock 1 is by lock core, dead bolt 3 is formed, the front end of dead bolt 3 has locating slot, the dead bolt 7 of secondary lock 2 constitutes to slide with the bottom of guide rod 4 to be paid, the top of guide rod 4 can be inserted in the locating slot of main lock tongue 3, back-moving spring 6 is enclosed within on the guide rod 4, be installed in the slideway 5, in the present embodiment, be provided with two cover guide rods 4, back-moving spring 6 and slideway 5 mechanisms, after main lock 1 was locked, the lock core that turns secondary lock 2 drove dead bolt 7 and promotes guide rod 4 and move to two ends, insert in the locating slot of main lock 1 dead bolt 3, make dead bolt 3 location of main lock 1 and can't move, prevented illegal unlatching, when the lock core of pair lock 2 is regained dead bolt 7, guide rod 4 breaks away from the locating slot of main lock tongue 3 under the effect of back-moving spring 6, main lock 1 can freely be opened.

Claims (1)

1, a kind of door lock locking device, comprise main lock (1) and secondary lock (2) composition, it is characterized in that: have locating slot on the dead bolt (3) of main lock (1), the dead bolt (7) of secondary lock (2) constitutes to be slidingly connected with the bottom of locking bar (4) to be paid, the top can be inserted in dead bolt (3) locating slot of main lock (1), back-moving spring (6) is enclosed within on the guide rod (4), and is installed in the slideway (5).

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