CN202055637U

CN202055637U - Master key-resistant lock

Info

Publication number: CN202055637U
Application number: CN2011200288650U
Authority: CN
Inventors: 吴宝富
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-01-27
Filing date: 2011-01-27
Publication date: 2011-11-30
Anticipated expiration: 2021-01-27

Abstract

Provided is a master key-resistant lock. One of upper billiards of a conventional pin tumbler lock is changed into an inverted T-shaped upper billiard (or an I-shaped upper billiard). The upper end portion of the inverted T-shaped upper billiard (or the central small-diameter portion of the I-shaped upper billiard) is located at the juncture between a lock core and a lock body. Since the gap between a pair of billiards including the inverted T-shaped upper billiard is significantly larger than the gap between any other pair of billiards, when a master key is used to unlock the lock, the pair of billiards including the inverted T-shaped upper billiard must be located as the last pair of billiards. As the gap between the pair of billiards including the inverted T-shaped upper billiard is quite large, the rotatable deflection angle of the last but one pair of billiards is relatively large. At this time, the lower shoulder portion of the inverted T-shaped upper billiard (or the lower shoulder portion of the I-shaped upper billiard) is clamped at the closed angle portion of the lower end of a billiard hole of the lock body. Meanwhile, upward movement of the master key can not lead to movement of lower billiards in billiard holes of the lock core. As the last billiard is clamped, the lock, with simple and reliable structure, cannot be unlocked via the master key, thereby achieving good anti-theft performance.

Description

The preventing universal key lock

Technical field

The utility model relates to a kind of cylinder lock, especially a kind ofly can prevent that experienced robber from utilizing master key to unblank, and is the splendid preventing universal key lock of theftproof performance.

Background technology

At present, in the known cylinder lock, the last pellet shot from a slingshot in the lock body in every row pellet shot from a slingshot hole is identical, but because foozle causes pellet shot from a slingshot and lock spring interporal lacuna to have trace different.Experienced robber's method for unlocking is: will dial hook earlier and insert lock core neutral gear place to torque of lock core generation, bump down pellet shot from a slingshot with the master key top then, a pair of pellet shot from a slingshot up and down with the gap minimum pushes up to lock core and lock body intersection earlier, and lock core this moment trace under torque turns over an angle.One by one paired pellet shot from a slingshot is up and down pushed up to lock core and lock body intersection from childhood and greatly by the pellet shot from a slingshot gap then, lock core this moment micro-one by one again increasing under torque turns over an angle.Until last pellet shot from a slingshot is up and down pushed up lock core and lock body intersection, this moment, lock core can rotate under torque significantly, locked and had also just opened, so be absolutely unsafe.

Summary of the invention

Can use the deficiency of unlocked by universal key in order to overcome existing cylinder lock.The utility model provides a kind of preventing universal key lock, and it can thoroughly stop uses unlocked by universal key, thereby greatly improves degree of safety.

The technical scheme that its technical problem that solves the utility model adopts is: the last pellet shot from a slingshot in one of them or several lock marble holes of existing cylinder lock is changed system into down (or the pellet shot from a slingshot on " worker " font of pellet shot from a slingshot on " T " font, lock marble hole is except that a bit of diameter in bottom is identical with other common lock marble hole simultaneously, the bigger formation lock marble hole of remainder diameter stub end), add a spring cup between pellet shot from a slingshot on " T " font (or on " worker " font pellet shot from a slingshot) and the spring falling.Falling pellet shot from a slingshot upper part on " T " font middle small diameter portion of pellet shot from a slingshot (or on " worker " font) is in lock core and lock body intersection, because its gap is obviously greater than other each gap to pellet shot from a slingshot, it is right to be in last when using master key to unblank, because its gap is big especially, cause the second last also relatively large to the rotary deflection angle of pellet shot from a slingshot, the shoulder portion under the pellet shot from a slingshot (or on " worker " font under the pellet shot from a slingshot shoulder portion) that falls this moment on " T " font just is stuck in lock marble hole lower end wedge angle part, this moment, master key upwards just pushed up the following pellet shot from a slingshot in the motionless lock core marble hole, because this pellet shot from a slingshot is stuck at last, this lock can't be opened with master key.

The beneficial effects of the utility model are: thoroughly stopped to utilize master key to open this lock, theftproof performance is good, and simple and reliable for structure.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the structure cross-sectional schematic of first embodiment of the utility model.

Fig. 2 is the axial cross-sectional schematic of first embodiment of the utility model.

Fig. 3 is pellet shot from a slingshot and a periphery place enlarged drawing (angle of the micro-deflection of lock core) on first embodiment of the utility model " T " font.

Fig. 4 is the structure cross-sectional schematic of second embodiment of the utility model.

Fig. 5 is the axial cross-sectional schematic of second embodiment of the utility model.

Fig. 6 is pellet shot from a slingshot and a periphery place enlarged drawing (angle of the micro-deflection of lock core) on second embodiment of the utility model " worker " font.

Do not belong to omit among the other parts figure in the lock of the present utility model and do not draw or do not annotate.

Among the figure on 1. lock body 1a. lock marble hole lower end wedge angle part 1b. lock marble hole stub end 2. 3. times pellets shot from a slingshot 4. of lock core 2a.. lock core marble hole " worker " fonts on pellet shot from a slingshot 4a. " worker " font under the pellet shot from a slingshot on shoulder portion 4b. " Z " font pellet shot from a slingshot upper part 5. fall on " T " font pellet shot from a slingshot 5a. and fall on " T " font under the pellet shot from a slingshot shoulder portion 5b. and fall pellet shot from a slingshot upper part 6. spring cups 7 on " T " font, spring

The specific embodiment

In Fig. 1, Fig. 2 and first embodiment shown in Figure 3, make down one of them pellet shot from a slingshot of existing cylinder lock on " T " font pellet shot from a slingshot 5, add a spring cup 6 between the pellet shot from a slingshot 5 and spring 7 on " T " font falling, its diameter is identical with billiards diameter on other is common.Common to go up billiards diameter identical with other to fall on " T " font under the pellet shot from a slingshot shoulder portion 5a (major diameter part), and pellet shot from a slingshot upper part 5b (small diameter portion) is significantly less than down on " T " font the diameter of shoulder portion 5a under the pellet shot from a slingshot on " T " font.

In Fig. 3, pellet shot from a slingshot upper part 5b (small diameter portion) is in lock core 2 and lock body 1 intersection on " T " font, because its gap is obviously greater than the gap of pellet shot from a slingshot on other each, it is right to be in last when using master key to unblank, because its gap is big especially, cause the second last also relatively large to the rotary deflection angle of pellet shot from a slingshot, fall on " T " font that shoulder portion 5a (major diameter part) just is stuck in lock marble hole lower end wedge angle part 1a under the pellet shot from a slingshot this moment, this moment, master key upwards just pushed up the following pellet shot from a slingshot 3 in the motionless lock core marble hole 2a, because this pellet shot from a slingshot is stuck at last, this lock can't be opened with master key.

In Fig. 4, Fig. 5 and second embodiment shown in Figure 6, make pellet shot from a slingshot on one of them of existing cylinder lock on " worker " font pellet shot from a slingshot 4, adding a spring cup 6 on " worker " font between pellet shot from a slingshot 4 and the spring 7.Outside the bottom a bit of diameter of lock spring hole was identical with other common lock marble hole, the other parts diameter changed greatly (being used for guaranteeing that pellet shot from a slingshot upper part 4b has big deflection gap on " worker " font) formation lock marble hole stub end 1b.Spring cup 6 diameters and lock marble hole stub end 1b are complementary.

In Fig. 6, the middle small diameter portion of pellet shot from a slingshot 4 is in lock core 2 and lock body 1 intersection on " worker " font, because its gap is obviously greater than the gap of pellet shot from a slingshot on other each, it is right to be in last when using master key to unblank, because its gap is big especially, cause the second last also relatively large to the rotary deflection angle of pellet shot from a slingshot, at this moment on " worker " font under the pellet shot from a slingshot shoulder 4a just be stuck in lock marble hole lower end wedge angle part 1a, this moment, master key upwards just pushed up the following pellet shot from a slingshot 3 in the motionless lock core marble hole 2a, because this pellet shot from a slingshot is blocked and removes at last, this lock can't be opened with master key.

Claims

1. preventing universal key lock is characterized in that the last pellet shot from a slingshot in one of them or several lock marble holes of cylinder lock is made down pellet shot from a slingshot (5) on " T " font; Or make pellet shot from a slingshot (4) on " worker " font, simultaneously lock marble hole except that a bit of diameter in bottom is identical with other common lock marble hole, the bigger formation lock marble hole of remainder diameter stub end (1b).