CN2588003Y

CN2588003Y - Theft-proof door lock

Info

Publication number: CN2588003Y
Application number: CN 02200712
Authority: CN
Inventors: 张念兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-01-14
Filing date: 2002-01-14
Publication date: 2003-11-26
Anticipated expiration: 2012-01-14

Abstract

The utility model designs a theft-proof door lock which comprises a handle picking piece of a casing, a connecting rod, a main lock bolt, upper and lower lock bolts, a wind tongue, a hook plate and a locking slide block. The utility model is characterized in that the force produced by turning the handle moves the lower lock bolt by the handle picking piece and the connecting rod, a slot and a gear rack of the lower lock bolt respectively moves the main lock bolt and a gear, and the main lock bolt and the upper lock bolt which is meshed with the gear are moved accordingly. When a door is locked, the handle picking piece is turned anticlockwise to an apex in order to make the main lock bolt, the upper lock bolt, the lower lock bolt and the wind tongue extend out of the lock body; at the same time, the hook plate is poked by the handle picking piece and the locking slide block is pushed by a spring into a gap at the tail part of the main lock bolt, and the main lock bolt is locked up. When the door is unlocked, a driving wheel is turned and the locking slide block is pushed off to hook the hook plate, the handle picking piece is turned clockwise by a handle in order to make the main lock bolt, the upper auxiliary lock bolt, the lower auxiliary lock bolt and the wind tongue retract in the lock body, and then the lock is unlocked.

Description

A kind of safe-guard door lock

The utility model discloses a kind of safe-guard door lock, belong to the technical field of theftproof lock.

General safe-guard door lock has 4 locking bolts, comprises master latch, upper and lower locking bolt and wind tongue, and its type of drive is to stretch out or the lock body of withdrawing with key rotary locking cylinder shooting the lock-bolt, the moment of torsion that this mechanism bears key is big, fractures easily.

The purpose of this utility model is a kind of safe-guard door lock that drives locking bolt with handle of design, realizing rotating handle just can make above-mentioned 4 locking bolts stretch out or the lock body of withdrawing, make key only with stirring the locking slide block, can reach and lock a door without key, key only bears very little moment of torsion when unblanking, not the purpose of frangibility.

A kind of safe-guard door lock that the utility model is designed, comprise housing handle plectrum, the connecting rod master latch, on, following locking bolt, the wind tongue, collude plate, with the locking slide block, it is characterized in that making the power of rotating handle to promote locking bolt down through handle plectrum and connecting rod, by the skewed slot and the tooth bar of locking bolt promote master latch and gear respectively down, make master latch and with the last locking bolt movement therewith of gears engaged, when locking a door, rotate counterclockwise the handle plectrum and make master latch to the limit, on, following locking bolt and wind tongue stretch out lock body, simultaneously the handle plectrum is stirred and is colluded plate and make spring promote the space that the locking slide block enters the master latch afterbody, and master latch is pinned.When unblanking, rotate thumb wheel, push the locking slide block open, make it catch on plate, just can make master latch, upper and lower secondary latch bolt and wind tongue indentation lock body and realize unblanking with the handle handle plectrum that turns clockwise again with key.

Fig. 1 is the A-A sectional view of Fig. 2, also is structural front view of the present utility model.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the lateral view of Fig. 1.

Fig. 4 is the B-B profile of Fig. 1.

Fig. 5 is the C-C profile of Fig. 1.

Below in conjunction with accompanying drawing and example the utility model is described in detail.

Example 1: the structure of the described a kind of safe-guard door lock of this example is seen Fig. 1～Fig. 5.

This example is by housing, locking bolt, lock core, driving mechanism, parts such as retaining mechanism are formed, all part is manufactured with steel, locking slide block 8 is riveted on the slide plate 7, the semiaxis 18 and the axis of guide 20 are riveted on the bottom surface of housing 2 respectively, bearing pin 17 is riveted on the other end of connecting rod 13 and can slides in the arc shaped groove of handle plectrum 5, the other end of connecting rod 13 serves as that axle rotates with the bearing pin 21 that is riveted on down on the locking bolt 11, axle 19 is riveted on the bottom surface of master latch 14 and can slides in the skewed slot of following locking bolt 11, gear 15 serves as that axle rotates with the section of rack engagement of last locking bolt 1 and following locking bolt 11 and with semiaxis 18 simultaneously, spring 6 is a torsion spring, one end of its active force makes and colludes plate 4 to rotation counterclockwise, the other end moves downward locking slide block 7, and handle plectrum 5 rotates synchronously with handle thumb wheel 16.Colluding plate 4 serves as that axle freely rotates with handle thumb wheel 16.Figure 1 shows that locking states, when needs are unblanked, key is inserted in the keyhole of lock core 9 and be rotated counterclockwise, lock core thumb wheel 10 is stirred slide plate 7 and slide plate 7 is hung on the eave tile that colludes plate 4, make handle plectrum 5 upwards spur connecting rod 13 with the handle handle thumb wheel 16 that turns clockwise again by bearing pin 17, connecting rod 13 when being pulled, by the axle 19 in the skewed slot with drive master latch 14 respectively with tooth bar meshed gears 15 and contact with the afterbody of wind tongue guide rod 13 in rotary course with last locking bolt 1 withdrawal lock body handle plectrum 5 and when rotating to terminal point, make wind tongue 12 also return lock body.When the needs locking, with the handle handle plectrum 5 that turns clockwise, when sliding into end points in arc shaped groove, bearing pin 17 promotes connecting rod 13, make master latch and upper and lower locking bolt stretch out lock body, handle plectrum 5 is stirred to clockwise direction and is colluded plate 4 simultaneously, make and collude plate 4 and take off with slide plate 7 and collude, slide plate 7 is glided by the active force of spring 6 and is bumped into the space of master latch 14 afterbodys and it is pinned.Arc shaped groove on the handle plectrum can make handle at any time can both be reset to level.

Claims

1, a kind of safe-guard door lock, comprise housing, handle plectrum, connecting rod, master latch, up and down locking bolt, wind tongue, collude plate and locking slide block, it is characterized in that: the power of rotating handle promotes locking bolt down through handle plectrum and connecting rod, promote master latch and gear respectively by skewed slot and tooth bar on the following locking bolt, make the last locking bolt movement therewith of master latch and gears engaged; When master latch stretches out lock body, the locking slide block break away from collude plate be bumped into the master latch afterbody the space and with its pinning.

2, according to claim 1 described a kind of safe-guard door lock, it is characterized in that: on the handle plectrum, arc shaped groove is arranged, handle all can be resetted in horizontal level when opening with locking states.