CN2057442U

CN2057442U - Anti-theft alarm lock

Info

Publication number: CN2057442U
Application number: CN 89201402
Authority: CN
Inventors: 马光伦
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-01-28
Filing date: 1989-01-28
Publication date: 1990-05-23

Abstract

The utility model discloses an anti-theft alarm lock, which adopts a padlock with the advantages prying resistance, poking resistance, etc. Magnetic steel and a magnetic-control switch are arranged on a lock button and a lock shell, which triggers the alarm to send out strong alarm sound when the door is knocked violently. The utility model can effectively prevent various methods of theft, which is suitable for production by small companies.

Description

Anti-theft alarm lock

The utility model relates to alarming lock.

In order to tackle stealer, domestic many experts are at the development alarming lock.Usually alarming lock is made up of door lock, sensor, control device and warning device.

Existing alarming lock defective is more, can not satisfy antitheft requirement.

Two functions as domestic utility model application CN86208174 all have obvious defects.The one, its anti-violent lock breaking contact K2 is that little shell also is to be fixed on the doorframe on the doorframe that is fixed in the little shell, has only when little shell to be knocked and K2 still just might trigger warning on doorframe.This situation has only when running into violence and hit, and the screw loosening of fixing little shell withdraws from just possible.But the general user is fixed on little shell on the doorframe firmly with long screw, is torn together with the wood at fixing little shell place often so the result of door is hit in violence, and like this, anti-violent lock breaking contact K2 is just inoperative.The 2nd, its anti-lock contact K1 that dials unites use with power switch K and delay switch K4, very easily produces maloperation for most of common people: as forgotten to shut K when going out and the police just may occur failing to report; Forget to open K after entering and false alarm to have occurred.

And for example domestic utility model application CN87208892 very easily causes false alarm, as long as push rod is pressed into lock body will false alarm.

The purpose of this utility model provides a kind ofly can prevent reliably that violence hits door, can not produce and fail to report alert and false alarm, meets the anti-theft alarm lock of resident's use habit.

The utility model adopts padlock, installs anti-violence additional and hits the door alarm device.Padlock is the compression casting moulding, has firm solid, pick-proof, anti-ly dials, outstanding advantage such as anti-saw.

Go up installation magnet steel (3) and (5) at snap close (2) and lock housing (1), magnetic switch (4) and (6) is installed, near magnet steel (3) and (5) hereinafter to be referred as switch.The switch in parallel or the resistance R 1 of having connected are drawn by two leads (9) and (10), and switch (6) is drawn by lead (7) and (8), and it is all very thin that all draw lead, and mechanical strength is very low.Switch (4) and (6) series connection back connect with alarm (13).The signal input line of alarm (11) and (12) are polarity not, and are interchangeable.

Operating principle of the present utility model is: switch (4) and (6) are normally closed under magneticaction, disconnect when distance enlarges between switch and the magnet steel.Because snap close and lock housing all are to be fixed on doorframe and the door with wood screw, snap close may fall down because of wood screw is loosening when violence is hit, or is torn together with snap close place wood; In like manner, kindred circumstances also may take place in lock housing.To conclude and get up to have 4 kinds of possibilities: one. distance enlarges between magnet steel (3) and the switch (4); Two. the distance between magnet steel (5) and the switch (6) enlarges; Three. under magnet steel (3) was torn on same wood chip with switch (4), fine lead was broken; Four. under magnet steel (5) was torn on same wood chip with switch (6), fine lead was broken.More than any phenomenon all can send break signal, make triode BG1 conducting shown in Figure 2, thus the relay J adhesive, it has two pairs of contacts, and wherein the J2 conducting makes warning IC(CW9561) work, the output frequency variation signal, the input loudspeaker sends alarm signal after triode BG2 amplifies.Relay contact J1 plays self-locking action.

Advantage of the present utility model is: lock body is solid, pick-proof, anti-dial, proximity-warning device accurately and reliably, can take precautions against various pilferage modes effectively.False alarm can not take place in all use key normal door persons, allly must report to the police without the improper door opener of key, can not fail to report, and meets resident's use habit.

Line has only two between sensor of the present utility model and the alarm, and polarity not, but both single household uses, and as vast family, also can insert warning net easily.

Fig. 1 is a scheme of installation of the present utility model.

Fig. 2 is alarm circuit figure.

Claims

1, a kind of anti-theft alarm lock is characterized in that going up installation magnet steel (3) and (5) at snap close (2) and lock housing (1), and magnetic switch (4) and (6) are installed respectively near magnet steel (3) and (5).

2, alarming lock according to claim 1 is characterized in that: the lead-out wire of magnetic switch (4) and (6) is very thin, and mechanical strength is very low.

3, alarming lock according to claim 1 is characterized in that: the in parallel or resistance R 1 of having connected of magnetic switch (4) connects alarm (13) after (4) and (6) series connection.