CN101818597A

CN101818597A - Safety door lock

Info

Publication number: CN101818597A
Application number: CN200910126140A
Authority: CN
Inventors: 陈万儒
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-02-26
Filing date: 2009-02-26
Publication date: 2010-09-01

Abstract

The invention relates to a safety door lock with the function of tamper resistance. One end of a shift piece is fixed on the head of a lock, while the other end is arranged in a shift hole; a sleeve is sleeved on the lock head, and a rivet passes through the sleeve and is riveted into the lock head with a depth of 0.5-1.0 millimeter; a spring clamps the lock head; a slide clamp piece is arranged on a cover plate slide rail, and the shift piece passes through a round hole and is arranged in the shift hole; the tail end of the slide clamp piece is provided with a pressure spring; and a washer controls the slide clamp piece to forwards move. When the lock is unlocked by using a key, the lock can normally work; and when the lock is unlocked by violence, the lock head shoves off the rivet and rotates, the washer deviates the slide clamp piece at the same time, and a self-locking device is started to clamp the shift piece so as to ensure that various parts cannot be shifted to work by the shift piece.

Description

Safety door latch

Affiliated technical field

The present invention relates to a kind of safety door latch, especially have the safety door latch of pick-proof self-locking device.

Background technology

Present known safety door latch is that plectrum one end is fixed on the tapered end, and the other end is inserted in the lock body dial hole.When opening with key, lock core rotates together with plectrum, drives inner each the parts work of lock body by plectrum, thereby makes the dead bolt advance and retreat.But picking lock also is to utilize tapered end or lock core to rotate to drive the plectrum work principle.General lock does not have tamper-resistant function, and pries open easily.

Summary of the invention

Be the deficiency of avoiding safety door latch to pry open easily, the invention provides a kind of safety door latch, this lock is not only the same easy to use with other lock, and the pick-proof auto-lock function is arranged.

The technical scheme that the present invention solves the employing of its technical problem is:

Plectrum one end is fixed on the tapered end, the other end is contained in the lock body dial hole, establish a catch on the tapered end, tapered end is enclosed within the sleeve pipe and is blocked by jump ring, and passes the sleeve pipe riveting with two rivets and go into 0.5-1.0 millimeters deep in the tapered end, on the cover board establishes a sliding rail, refill the slip card, the circular hole that plectrum passes on the slip card is contained in the dial hole, and slip card end is adorned a compression spring, catch control slip card.Each parts work when starting lock core with key when violence is unblanked, struts rivet at the effect lower lock head of power, and drive the catch rotation and depart from steel nail, the slip card under unresisted situation, be subjected to spring pressure forward card master plectrum plectrum can't be rotated, be able to the purpose of pick-proof.

Beneficial effect is to prevent picking lock.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is one embodiment of the present of invention.

1. lock cores among the figure, 2. tapered end, 3. sleeve pipe, 4. rivet, 5. jump ring, 6. cover plate, 7. washer, 8. steel nail, 9. sliding rail, 10. rivet, 11. screws, 12. screws, 13. fixed iron pieces, 14. plectrum, 15. dial holes, 16. slip cards, 17. springs, 18. circular holes, 19. protection iron plates.

The specific embodiment

Tapered end in Fig. 1 (2) fixedly plectrum (14) one ends, plectrum (14) other end passes that circular hole (18) is installed in the dial hole (15), sleeve pipe (3) is enclosed within on the tapered end (2), pass sleeve pipe (3) and riveting with rivet (4) and rivet (10) and go into 0.5-1.0 millimeters deep in the tapered end, block main tapered end (2) with jump ring (5), washer (7) is fixed on the tapered end (2); The slip card (16) that end is equipped with spring (17) is installed on the sliding rail (9), and the shelves of the steel nail (8) on the slip card (16) at washer (7) afterwards, protection iron plate (19) is installed on the slip card (16), fixed iron piece (13) fixed sleeving (3), and the breach direction of fixed iron piece (13) is identical with the moving direction of slip card (16).The slip card thickness can not be lower than 1.5 millimeters, and hardness is preferably more than the twice of plectrum hardness.

Claims

1. safety door latch, plectrum one end is fixed on the tapered end, and the other end is installed in the lock body dial hole, it is characterized in that: adorn a sleeve pipe on the tapered end, pass the sleeve pipe riveting by two rivet symmetries and go into 0.5-1.0 millimeters deep in the tapered end, block tapered end with jump ring again; The tapered end end is adorned a washer, and the slip card is installed on the sliding rail, and a washer resistance shelves slip card moves forward, and slip card the place ahead is fixed a steel nail back compression spring is housed.

2. safety door latch according to claim 1 is characterized in that: tapered end and washer are one, and the circular hole that fixed iron piece fixed sleeving, plectrum pass on the slip card is contained in the dial hole.

3. safety door latch according to claim 1 is characterized in that: tapered end is enclosed within the sleeve pipe, is fixed by rivet and jump ring, the fixed iron piece fixed sleeving, and its breach direction is identical with slip card moving direction.