CN107700951B

CN107700951B - Anti-theft cylinder lock

Info

Publication number: CN107700951B
Application number: CN201711104123.XA
Authority: CN
Inventors: 景峰; 董佳; 曹正; 孙梓傲; 柯燕钰; 柯树青; 柯惠芬; 陆文正
Original assignee: Pujiang Sina Lock Co ltd
Current assignee: Pujiang Sina Lock Co ltd
Priority date: 2017-11-10
Filing date: 2017-11-10
Publication date: 2023-03-31
Anticipated expiration: 2037-11-10
Also published as: CN107700951A

Abstract

The invention relates to an anti-theft spring lock, which comprises a shell, a spring lock and a crank arm, wherein the tail end of a lock core of the spring lock is provided with a connected first polygonal shaft, and the crank arm is provided with a second polygonal shaft; the lock cylinder is characterized by further comprising a sliding sleeve, one end of the sliding sleeve is provided with a polygonal sleeve hole matched with the first polygonal shaft and the second polygonal shaft, a spring for resetting is arranged between the end of the sliding sleeve and the shell, the other end of the sliding sleeve is slidably sleeved with the lock cylinder, the side wall of the lock cylinder is provided with a sliding slot hole for communicating the key hole with the outside, sliding limiting is formed between the sliding sleeve and the sliding slot hole through a pin, and the pin extends into the key hole; when a correct key is inserted into a key hole of the lock cylinder, the key pushes the pin to drive the sliding sleeve to axially slide to be simultaneously in transmission connection with the first polygonal shaft and the second polygonal shaft, so that normal unlocking is realized; when a correct key is not inserted into the key hole of the lock cylinder, the sliding sleeve is separated from one of the first polygonal shaft and the second polygonal shaft in a transmission connection mode and cannot be unlocked, and therefore the anti-theft purpose is achieved.

Description

Anti-theft cylinder lock

Technical Field

The invention relates to a lockset, in particular to an anti-theft spring lock.

Background

The anti-theft lock is divided into a spring lock, a blade lock, a magnetic lock, a smart card door lock, a fingerprint lock and the like according to different principles of a lock core, wherein the most common spring locks in the market, such as a straight-line lock, a cross lock, a computer lock and the like, belong to the spring locks. The principle of the spring lock is that a plurality of cylindrical parts (called lock springs, balls or balls) with different heights are used for locking a lock cylinder, and when a correct key is put in, all the cylindrical parts are pushed to the same height, the lock cylinder can rotate, and unlocking is achieved. However, the existing spring lock has a simple working principle, so that the anti-theft performance is not high, and the lock is easy to be unlocked by a tool. In order to solve the technical problem, the prior art has disclosed more schemes, for example, a multi-row pin tumbler structure or a vertical-horizontal bidirectional pin tumbler structure is adopted, although the unlocking difficulty can be increased by the structures, the unlocking principle is still not changed, and the unlocking is still easy to crack. For this reason, improvements to the existing anti-theft locks are to be made.

Disclosure of Invention

In order to solve the problem that an anti-theft lock in the prior art is easy to crack and open, the invention designs an anti-theft spring lock which is realized by adopting the following technical scheme.

An anti-theft pin tumbler lock comprises a shell, a pin tumbler lock and a crank arm which is linked with a lock tongue to act, wherein the pin tumbler lock comprises a lock core and a lock sleeve, the lock core is provided with a key hole, the tail end of the lock core is linked with the crank arm, the lock sleeve is fixed on the shell, and the crank arm is rotationally positioned on the shell; the tail end of the lock cylinder is provided with a connected first polygonal shaft, and the crank arm is provided with a second polygonal shaft with the same section as the first polygonal shaft; the anti-theft door lock comprises a clutch mechanism, wherein the clutch mechanism comprises a sliding sleeve and a spring, one end of the sliding sleeve is provided with a polygonal trepan boring matched with the first polygonal shaft and the second polygonal shaft, the spring for resetting is arranged between the end of the sliding sleeve and a shell, the other end of the sliding sleeve is slidably sleeved with the lock cylinder, the side wall of the lock cylinder is provided with a sliding slot hole for communicating a key hole and the outside, a sliding limit is formed between the sliding sleeve and the sliding slot hole through a pin, and the pin extends into the key hole; when a correct key is inserted into the key hole of the lock cylinder, the key pushes the pin to drive the sliding sleeve to axially slide to be simultaneously in transmission connection with the first polygonal shaft and the second polygonal shaft; when a correct key is not inserted into the key hole of the lock cylinder, the sliding sleeve is separated from transmission connection with one of the first polygonal shaft and the second polygonal shaft. Through the structure, the first polygonal shaft and the second polygonal shaft are disconnected and connected by sliding of the sliding sleeve, only when a key is inserted, the sliding sleeve can reliably connect the first polygonal shaft and the second polygonal shaft to realize unlocking, otherwise, the spring lock can only idle even if unlocked, and in the idling process of the spring lock, even if the sliding sleeve is in transmission connection with the first polygonal shaft and the second polygonal shaft, the spring lock can not be unlocked due to limitation of the rotation angle, the angle stroke specified for unlocking can not be completed, and the spring lock can not be unlocked, so that the unlocking difficulty is greatly improved, and the spring lock is not easy to unlock.

In the anti-theft pin tumbler lock, the aperture of the polygonal trepanning of the sliding sleeve is smaller than the inner aperture of the sliding sleeve, the length of the polygonal trepanning is larger than that of the second polygonal shaft, and a shaft section with one end having a shaft diameter smaller than that of the second polygonal shaft is arranged between the second polygonal shaft and the crank arm. Through this structure, the condition that makes sliding sleeve and the transmission of second polygon axle be connected is more strict, and the sliding sleeve slides the excessive position or does not slide to target in place all unable with the transmission of second polygon axle realization.

In the anti-theft pin tumbler lock, the inner wall of the polygonal sleeve hole of the sliding sleeve forms an inwards concave annular groove, and the width of the annular groove is greater than the length of the second polygonal shaft. Through this structure, further increase the degree of difficulty that sliding sleeve and second polygon shaft drive are connected, increase the degree of difficulty of cracking the unblanking promptly.

In the anti-theft pin tumbler lock, the lock cylinder is provided with the sliding slot holes which are symmetrically arranged, the sliding sleeve is correspondingly connected with a pair of pins, and one pin is only used for sliding and limiting. Through this structure, improve the gliding stability of sliding sleeve.

In the anti-theft pin tumbler lock, the other pin is abutted against the tooth part of the key. Through this structure, can be according to the key tooth part structure difference, the pin of different length is designed.

The invention has the advantages of greatly improving the unlocking difficulty of the lockset and improving the safety of the lockset, and is particularly suitable for the lockset which is unlocked at a corner of 90 degrees.

Drawings

FIG. 1 is a schematic diagram of the initial state structure of the present invention.

Fig. 2 is a structural schematic diagram of the unlocking state of the present invention.

The sequence numbers and names in the figure are: 1. the lock cylinder 101, the first polygonal shaft 2, the lock sleeve 3, the sliding sleeve 301, the annular groove 4, the spring 5, the crank arm 501, the second polygonal shaft 6 and the shell.

Detailed Description

The invention will now be described with reference to the accompanying drawings.

As shown in fig. 1 and 2, the anti-theft pin tumbler lock comprises a shell 6, a pin tumbler lock and a crank arm 5 for linking the action of a lock tongue, wherein the pin tumbler lock comprises a lock cylinder 1 and a lock sleeve 2, the lock cylinder 1 is provided with a key hole, the tail end of the lock cylinder 1 is linked with the crank arm 5, the lock sleeve 2 is fixed on the shell 6, and the crank arm 5 is rotationally positioned on the shell 6. The tail end of the lock core 1 is provided with a first polygonal shaft 101 connected with the lock core, and the crank arm 5 is provided with a second polygonal shaft 501 with the same section as that of the first polygonal shaft 101. The anti-theft pin tumbler lock comprises a clutch mechanism, wherein the clutch mechanism comprises a sliding sleeve 3 and a spring 4, one end of the sliding sleeve 3 is provided with a polygonal trepanning matched with a first polygonal shaft 101 and a second polygonal shaft 501, the spring 4 used for resetting is arranged between the end of the sliding sleeve 3 and a shell 6, the aperture of the polygonal trepanning is smaller than the inner aperture of the sliding sleeve 3, the length of the polygonal trepanning is larger than that of the second polygonal shaft 501, a shaft section with one end smaller than that of the second polygonal shaft 501 is arranged between the second polygonal shaft 501 and a crank arm 5, the inner wall of the polygonal trepanning of the sliding sleeve 3 forms a concave annular groove 301, and the groove width of the annular groove 301 is larger than that of the second polygonal shaft 501. The other end of the sliding sleeve 3 is slidably sleeved with the lock cylinder 1, the side wall of the lock cylinder 1 is provided with a pair of symmetrically arranged sliding groove holes which are communicated with the key hole and the outside, sliding limit is formed between the sliding sleeve 3 and the sliding groove holes through a pair of pins, one pin extends into the key hole, and the other pin is only used for sliding limit. When a correct key is inserted into a key hole of the lock cylinder 1, the tooth part of the key pushes the pin to drive the sliding sleeve 3 to axially slide to be simultaneously in transmission connection with the first polygonal shaft 101 and the second polygonal shaft 501; when the correct key is not inserted into the keyhole of the key cylinder 1, the sliding sleeve 3 is disengaged from the driving connection with one of the first polygonal shaft 101 and the second polygonal shaft 501.

The working principle of the invention is as follows: in the initial state, the sliding sleeve 3 is in transmission connection with only the first polygonal shaft 101 of the lock cylinder 1, is not in transmission connection with the second polygonal shaft 501, and transmission cannot be performed between the first polygonal shaft 101 and the second polygonal shaft 501. When a correct key is inserted into the keyhole of the lock cylinder 1, the tooth part of the key pushes the pin and drives the sliding sleeve 3 to slide to be in transmission connection with the first polygonal shaft 101 and the second polygonal shaft 501, and at the moment, the key is rotated, so that unlocking operation can be realized. When a correct key is not inserted into the keyhole of the lock cylinder 1, the tooth part of the key is difficult to push the pin to drive the sliding sleeve 3 to slide, or even if the sliding sleeve 3 is pushed to slide, the sliding sleeve 3 slides over the position or slides not in place, the second polygonal shaft 501 connected with the crank arm 5 cannot be driven, namely, the unlocking cannot be completed, and the anti-theft purpose is realized.

Claims

1. An anti-theft spring lock comprises a shell (6), a spring lock and a crank arm (5) which is linked with a lock tongue to act, wherein the spring lock comprises a lock cylinder (1) and a lock sleeve (2), the lock cylinder (1) is provided with a key hole, the tail end of the lock cylinder (1) is linked with the crank arm (5), the lock sleeve (2) is fixed on the shell (6), and the crank arm (5) is rotationally positioned on the shell (6); the lock is characterized in that a first polygonal shaft (101) connected with the tail end of the lock core (1) is arranged, and a second polygonal shaft (501) with the same section as the first polygonal shaft (101) is arranged on the crank arm (5); the anti-theft spring lock comprises a clutch mechanism, wherein the clutch mechanism comprises a sliding sleeve (3) and a spring (4), one end of the sliding sleeve (3) is provided with a polygonal sleeve hole matched with a first polygonal shaft (101) and a second polygonal shaft (501), the spring (4) for resetting is arranged between the end of the sliding sleeve (3) and a shell (6), the other end of the sliding sleeve (3) is in sliding sleeve connection with a lock cylinder (1), the side wall of the lock cylinder (1) is provided with a key hole and an external sliding groove hole, a sliding limit is formed between the sliding sleeve (3) and the sliding groove hole through a pin, and the pin extends into the key hole; when a correct key is inserted into a key hole of the lock cylinder (1), the key pushes a pin to drive a sliding sleeve (3) to axially slide to be simultaneously in transmission connection with the first polygonal shaft (101) and the second polygonal shaft (501); when a correct key is not inserted into a key hole of the lock cylinder (1), the sliding sleeve (3) is separated from transmission connection with one of the first polygonal shaft (101) and the second polygonal shaft (501); the aperture of a polygonal sleeve hole of the sliding sleeve (3) is smaller than the inner aperture of the sliding sleeve (3), the length of the polygonal sleeve hole is larger than that of the second polygonal shaft (501), and a shaft section with one end having a shaft diameter smaller than that of the second polygonal shaft (501) is arranged between the second polygonal shaft (501) and the crank arm (5); an inwards concave annular groove (301) is formed in the inner wall of a polygonal trepan boring of the sliding sleeve (3), and the groove width of the annular groove (301) is larger than the length of the second polygonal shaft (501); the lock cylinder (1) is provided with symmetrically arranged sliding slot holes, the sliding sleeve (3) is correspondingly connected with a pair of pins, and one pin is only used for sliding limiting.

2. An antitheft night lock according to claim 1 wherein the other pin is against the teeth of the key.