CN216197246U

CN216197246U - Lock tongue pick-proof structure of door lock

Info

Publication number: CN216197246U
Application number: CN202122517837.1U
Authority: CN
Inventors: 沈达顺
Original assignee: Zhejiang Tianyu Smart Home Co ltd
Current assignee: Zhejiang Tianyu Smart Home Co ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2022-04-05
Anticipated expiration: 2031-10-19

Abstract

The utility model discloses a lock tongue anti-prying structure of a door lock, which comprises an oblique bolt arranged on a lock shell and an oblique bolt shifting piece for pushing the oblique bolt to retract inwards, wherein a blocking safety component for preventing the oblique bolt from retracting inwards is arranged in the lock shell and comprises a blocking piece, a safety piece and a safety spring; the blocking piece is rotatably arranged on the lock shell through a pin shaft, one end of the blocking piece is provided with a blocking part which is abutted against the inclined tongue, and the other end of the blocking piece is provided with a linkage part which is abutted against the linkage cam; the safety spring is arranged on the pin shaft, one end of the safety spring is abutted against the linkage part, and the other end of the safety spring is connected with the safety disc; when the latch bolt extends out of the lock shell to close the door, the blocking piece abuts against the latch bolt through the blocking part to prevent the latch bolt from retracting inwards, and the latch bolt is prevented from being pulled out by the clamping piece or other sheets through the door slot, so that the anti-prying purpose is achieved.

Description

Lock tongue pick-proof structure of door lock

Technical Field

The utility model relates to a door lock, in particular to a spring bolt anti-prying structure of the door lock.

Background

Along with the development of the technology, lock products are changed continuously, and particularly along with the application of microelectronic technology, a plurality of intelligent locks of various types and the like appear, but basically lock bodies used by the existing door locks are all provided with oblique tongues, and the oblique tongues are provided with oblique surface areas and plane areas; when the door is closed, the oblique tongue strikes a lock hole of the buckle box, the oblique tongue is temporarily pressed back into the lock shell under the action of the door closing force, the oblique tongue is automatically ejected into an oblique tongue hole of the buckle box by the acting force of a spring in the lock shell after the door is closed, the closing state of the door is kept, and at the moment, a plane area of the oblique tongue is in contact with the buckle box. However, the inclined plane area of the latch bolt is pulled out by a card or other sheets through the door slot, so that the latch bolt retracts into the lock shell to cause the possibility of illegal entering a room, and potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a spring bolt anti-prying structure of a door lock.

In order to achieve the purpose, the utility model provides the following technical scheme:

a lock tongue pick-proof structure of a door lock comprises a latch bolt arranged on a lock shell and a latch bolt shifting piece for pushing the latch bolt to retract inwards, wherein a blocking safety component for preventing the latch bolt from retracting inwards is arranged in the lock shell and comprises a blocking piece, a safety piece and a safety spring; the blocking piece is rotatably arranged on the lock shell through a pin shaft, one end of the blocking piece is provided with a blocking part which is abutted against the inclined tongue, and the other end of the blocking piece is provided with a linkage part which is abutted against the linkage cam; the safety spring is arranged on the pin shaft, one end of the safety spring is abutted against the linkage part, and the other end of the safety spring is connected with the safety disc; the linkage cam is rotatably arranged on one side of the latch bolt shifting piece, and the latch bolt shifting piece can drive the blocking piece to rotate through the linkage cam to compress the safety spring, so that the blocking part is separated from the latch bolt.

The utility model further provides that: the linkage cam is provided with a first matching surface matched with the linkage part and a second matching surface matched with the latch pull sheet.

The utility model further provides that: the linkage cam is provided with a reset torsion spring for driving the linkage cam to reset.

The utility model further provides that: the safety piece is arranged below the blocking piece, one end of the safety piece is provided with a safety post, and the other end of the safety piece is provided with a sliding chute matched with the pin shaft; the safety piece is provided with a pressing part matched with the blocking piece, when the safety post is compressed back into the lock shell, the safety piece compresses the safety spring and drives the pressing part to move backwards to remove the pressing of the blocking piece, so that the blocking part is abutted against the latch bolt.

The utility model has the beneficial effects that: when the latch bolt stretches out the lock shell and closes the door, block the piece and lean on at the latch bolt through the stop part, prevent that the latch bolt inwards withdraws, prevent that the latch bolt is pulled out through the crack by card or other thin slices, reach the pick-proof purpose, and when needing to open the door, the latch bolt plectrum can drive through the linkage cam and block the piece rotation compression safety spring for stop part and latch bolt phase separation, thereby make the latch bolt plectrum can promote smoothly in the latch bolt withdrawal lock shell, simple structure and practicality.

Drawings

FIG. 1 is a schematic view of a lock with a anti-picking mechanism mounted on a lock housing;

FIG. 2 is a schematic view of a lock case of the anti-picking structure of the bolt of the door lock according to the present invention;

FIG. 3 is a schematic structural view of a barrier sheet;

FIG. 4 is a schematic structural view of the rupture disc and the safety post;

FIG. 5 is a schematic view of the anti-picking structure of the lock bolt of the door lock in the state of opening the door, in which the safety post is not compressed;

FIG. 6 is a schematic view of a door lock with a compressed safety post in a closed state according to the present invention;

fig. 7 is a schematic view of the anti-picking structure of the bolt of the door lock in the state of preparing to unlock the door.

Description of reference numerals: 1. a lock case; 2. a latch bolt; 3. a latch-tongue poking piece; 4. a barrier fuse assembly; 41. a blocking sheet; 411. a blocking portion; 412. a linkage section; 42. a safety disc; 421. a chute; 422. a pressing part; 43. a safety spring; 44. a pin shaft; 45. a linkage cam; 451. a first mating surface; 452. a second mating surface; 46. and a safety post.

Detailed Description

The anti-picking structure of the lock tongue of the door lock of the present invention will be described in further detail with reference to fig. 1 to 7.

As can be seen from fig. 1 and 2, the deadbolt anti-prying structure of a door lock comprises a latch bolt 2 arranged on a lock shell 1 and a latch bolt shifting piece 3 for pushing the latch bolt 2 to retract inwards, wherein a blocking safety component 4 for preventing the latch bolt from retracting inwards is arranged in the lock shell 1, and the blocking safety component 4 comprises a blocking piece 41, a safety piece 42 and a safety spring 43; the blocking piece 41 is rotatably arranged on the lock shell 1 through a pin shaft 44, one end part of the blocking piece is provided with a blocking part 411 abutting against the latch bolt 2, and the other end part of the blocking piece is provided with a linkage part 412 abutting against the linkage cam 45, as shown in fig. 3; the safety spring 43 is arranged on the pin shaft 44, one end part of the safety spring 43 is abutted against the linkage part 412, and the other end part is connected with the safety disc 42; when oblique tongue 2 stretches out the lock shell 1 and closes the door, block piece 41 and lean on at the oblique tongue through the barrier part 411, prevent that the oblique tongue inwards withdraws, prevent that oblique tongue 2 is pulled out through the crack by card or other thin slices, reach the pick-proof purpose, and when needing to open the door, oblique tongue plectrum 3 can drive block piece 41 rotation compression safety spring 43 through linkage cam 45 for barrier part 411 and oblique tongue phase separation, thereby make oblique tongue plectrum 3 can promote smoothly that oblique tongue 2 withdraws in the lock shell 1, simple structure and practicality.

In order to avoid that the latch tongue is stopped by the blocking piece 41 when the door is opened, a safety piece 42 is arranged below the blocking piece 41, the safety piece 42 is arranged below the blocking piece 41, one end part of the safety piece 42 is provided with a safety post 46, and the other end part is provided with a sliding groove 421 matched with a pin shaft 44, as shown in fig. 4; the safety plate 42 is provided with the pressing portion 422 matched with the blocking plate 41, so that when the door is opened, as shown in fig. 5, the safety plate 42 presses the blocking plate 41 through the pressing portion 422, so that the blocking portion 411 of the blocking plate 41 cannot abut against the latch tongue, and when the safety post 46 is compressed back into the lock shell 1 to close the door, the safety plate 42 compresses the safety spring 43 and drives the pressing portion 422 to move backwards to release the pressing on the blocking plate 41, so that the blocking portion 411 abuts against the latch tongue as shown in fig. 6, the anti-prying purpose is ensured, and the safety plate 42 and the blocking plate 41 are linked through the safety spring 43, and the structure is simple.

The linkage cam 45 is provided with a reset torsion spring for driving the linkage cam to reset, the linkage cam 45 is further provided with a first matching surface 451 matched with the linkage part 412 and a second matching surface 452 matched with the latch lifting tab 3, when the latch lifting tab 3 rotates and presses the second matching surface 452 to drive the linkage cam 45 to rotate, at the moment, the linkage cam 45 presses the linkage part 412 of the blocking tab 41 through the first matching surface 451, so that the blocking tab 41 rotates and compresses the safety spring 43, and the blocking part 411 is separated from the latch, as shown in fig. 7.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. The utility model provides a spring bolt pick-proof structure of lock, is including setting up the latch bolt on the lock shell and promoting the latch bolt plectrum that the latch bolt inwards withdraws, characterized by: a blocking safety component for preventing the latch bolt from retracting inwards is arranged in the lock shell and comprises a blocking piece, a safety piece and a safety spring;

the blocking piece is rotatably arranged on the lock shell through a pin shaft, one end of the blocking piece is provided with a blocking part which is abutted against the inclined tongue, and the other end of the blocking piece is provided with a linkage part which is abutted against the linkage cam;

the safety spring is arranged on the pin shaft, one end of the safety spring is abutted against the linkage part, and the other end of the safety spring is connected with the safety disc;

the linkage cam is rotatably arranged on one side of the latch bolt shifting piece, and the latch bolt shifting piece can drive the blocking piece to rotate through the linkage cam to compress the safety spring, so that the blocking part is separated from the latch bolt.

2. The anti-picking structure of the lock tongue of the door lock as claimed in claim 1, wherein: the linkage cam is provided with a first matching surface matched with the linkage part and a second matching surface matched with the latch pull sheet.

3. The anti-picking structure of the lock tongue of the door lock as claimed in claim 1 or 2, wherein: the linkage cam is provided with a reset torsion spring for driving the linkage cam to reset.

4. The anti-picking structure of the lock tongue of the door lock as claimed in claim 1, wherein:

the safety piece is arranged below the blocking piece, one end of the safety piece is provided with a safety post, and the other end of the safety piece is provided with a sliding chute matched with the pin shaft;

the safety piece is provided with a pressing part matched with the blocking piece, when the safety post is compressed back into the lock shell, the safety piece compresses the safety spring and drives the pressing part to move backwards to remove the pressing of the blocking piece, so that the blocking part is abutted against the latch bolt.