CN2236530Y

CN2236530Y - Alarming door lock against cutting and prying

Info

Publication number: CN2236530Y
Application number: CN 95244032
Authority: CN
Inventors: 洪金宝
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-05-23
Filing date: 1995-05-23
Publication date: 1996-10-02
Anticipated expiration: 2005-05-23

Abstract

The utility model relates to an alarming door lock against cutting and prying used for iron doors and safes, comprising a lock shell, a lock head, a lock core, a shifting sheet, a latch bolt, a small bolt, a limit switch controlled by the latch bolt and an electronic alarm device controlled by the small bolt. The electronic alarm device is also provided with a temperature sensing probe arranged in the latch bolt. A crystal diode is sealed in the small tube of the probe via epoxy resin, and two poles of the crystal diode are led out of the small tube via conducting wires. When a robber prizes a door or cuts the latch bolt by a flame cutter, the utility model can alarm, and antitheft and alarm functions are complete.

Description

Anti-cutting Pickproof alarm iron gate lock

The utility model relates to a kind of door lock that is used for iron gate or safe, particularly a kind of iron gate lock of anti-cutting pick-proof.

The door lock that multiple pick-proof is arranged in the prior art.They are by lock housing, tapered end, lock core, plectrum, dead bolt, uvula and have the limit switch of dead bolt control and the electronic alarm device of the limit switch of uvula control etc. constitutes.When locking a door, the robber forces open the door and crack between a door and its frame is strengthened, and uvula stretches out, and the limit switch of dead bolt control this moment and the limit switch of uvula control are all connected circuit, and then electronic alarm device sends chimes of doom; And turn the key in the lock, dead bolt indentation and the limit switch of dead bolt control is opened circuit, though uvula stretches out the limit switch that makes uvula control and connects circuit, electronic alarm device does not send chimes of doom.But, the function that the not anti-robber of this alarm door lock reports to the police with flame cutter cutting dead bolt.

The purpose of this utility model is to provide a kind of door lock with anti-cutting and Pickproof alarm, increases its anti-theft feature.

For achieving the above object, the utility model adopts following technical proposals: this warning iron gate lock is the same with prior art to be included lock housing, tapered end, lock core, plectrum, dead bolt, uvula and has the limit switch of dead bolt control and the electronic alarm device of the limit switch that uvula is controlled.It is characterized in that electronic alarm device also has the temperature-sensing probe that is placed in the dead bolt.When the robber cut dead bolt with flame cutter, the dead bolt temperature raise rapidly, and temperature-sensing probe is promptly solely sent out its warning to the electronic alarm device input signal.

Described temperature-sensing probe can be designed as uses crystal diode of epoxy encapsulation in a tubule, the two poles of the earth of crystal diode are drawn outside the tubule by lead.The specified alarm temperature of electronic alarm device can be designed to a certain temperature range between 60 ℃-135 ℃.For this reason, can in the circuit design of electronic alarm device, be set, set in the type selecting of crystal diode that also can be in temperature-sensing probe, crystal diode resistance in parallel that can also be in temperature-sensing probe is by selecting for use different resistance values to set specified alarm temperature.

The circuit structure of the electronic alarm device of band temperature-sensing probe can be designed as: provide 4.5 volts DC power supply by three joint dry cells, constitute alarm control circuit by the diode of temperature-sensing probe, an electric capacity, four resistance, two triodes and two limit switches, constitute the alarm sound circuit by an electronic warning integrated package, two resistance, two triodes, an electric capacity, a transformer and a piezoelectric ceramics.

The utility model has conspicuous following advantage compared with prior art: this warning iron gate lock not only has the Pickproof alarm function, and has anti-high-temperature machining warning function, and anti-theft alarm function is comparatively complete.

Fig. 1 is the structural representation of an embodiment of the utility model.

Fig. 2 is the right view of Fig. 1.

Fig. 3 is the structural representation of temperature-sensing probe.

Fig. 4 is circuit theory diagrams of the present utility model.

An optimum implementation of the present utility model is: referring to Fig. 1 and Fig. 2, this warning iron gate is locked limit switch of being controlled by lock housing 18, tapered end 19, lock core 10, plectrum 5, dead bolt 3, uvula 6, the limit switch 12 that has dead bolt 3 controls and uvula 69 and the electronic alarm device that is placed in the temperature-sensing probe 4 in the dead bolt 3 etc. and is constituted.A limit switch 12 is a normally closed switch, is placed in the rear of dead bolt 3, and another limit switch 9 is a normally closed switch also, is placed in the rear of uvula 6; Piezoelectric ceramics is placed in the sound equipment chamber 11 in the lock housing 18, and three batteries are placed in the battery case 1 in the lock housing 18, the bonnet 16 under the dismounting backing out screw 15, and battery can change the outfit; All the other electronic components are placed in the electronic unit box 17 in the lock housing 18.Tapered end 19 has an internal cylinder and lock core 10 outdoors, all can turn the key in the lock inside and outside door.This iron gate lock also has an oblique tongue 2, revolves hand 20 and Men Nei draw ring 21 is handled by handle rotating shaft 14 by sphere outdoors, and is resetted by the elastic force of extension spring 13.Referring to Fig. 3, temperature-sensing probe 4 is to encapsulate a crystal diode 24 with epoxy resin 25 in a tubule 23, and the two poles of the earth of crystal diode 24 are drawn outside the tubule 23 by lead 26.Tubule is a copper pipe.Referring to Fig. 4, the circuit structure of the electronic alarm device of this iron gate lock is: provide 4,5 volts dc source E power supply by three joint dry cells, by the diode D of temperature-sensing probe 4, a capacitor C ₂, four resistance R ₁, R ₂, R ₃, R ₄With two limit switch K ₁, K ₂(being the part 12,9 among Fig. 1) constitutes alarm control circuit, by an electronic warning ic chip, two resistance R ₅, R ₆, two triode B ₁, B ₂, a capacitor C ₁, a transformer T and a piezoelectric ceramics TD constitute the alarm sound circuit.Its operating principle is: when the ruffian cut dead bolt 3 with flame cutter, reverse leakage current increased the diode D in the temperature-sensing probe 4 thereupon heating up, and when its temperature-sensitive reached rated value, electric leakage reached B ₄Conducting, B thereupon ₃Conducting, IC gets operating current, and its output makes B ₁, B ₂Work triggers piezoelectric ceramics YD and sends chimes of doom.Limit switch K ₁Be the state of alert after the closure, and limit switch K ₂For the switch of machinery triggering, at K ₁Closure and K ₂Also send warning when also closed.So when locking a door, limit switch 12 (is K ₁) closure, and limit switch 9 (is K ₂) open circuit.If the robber cuts dead bolt 3 with flame cutter, the diode D temperature-sensitive of temperature-sensing probe 4 reaches rated value, also sends warning.When owner turns the key in the lock, dead bolt 3 indentations, then limit switch 12 (is K ₁) open circuit, then can not send warning.

Claims

1, a kind of anti-cutting Pickproof alarm iron gate lock that is used for iron gate or safe, comprise lock housing (18), tapered end (19), lock core (10), pull out sheet (5), dead bolt (3), uvula (6) and have the limit switch (12) of dead bolt (3) control and the electronic alarm device of the limit switch (9) that uvula (6) is controlled, it is characterized in that electronic alarm device also has the temperature-sensing probe (4) that is placed in the dead bolt (3).

2, alarm iron door lock according to claim 1 is characterized in that temperature-sensing probe is to encapsulate a crystal diode (24) with epoxy resin (25) in a tubule (23), and the two poles of the earth of crystal diode (24) are drawn outside the tubule (23) by lead (26).

3, alarm iron door lock according to claim 2 is characterized in that crystal diode (24) resistance in parallel in the temperature-sensing probe (4).

4, alarm iron door lock according to claim 1 and 2 is characterized in that the circuit structure of electronic alarm device is: provide 4.5 volts dc source (E) power supply by three joint dry cells, by the diode (D) of temperature-sensing probe (4), an electric capacity (C ₂), four resistance (R ₁, R ₂, R ₃, R ₄), two triode (B ₃, B ₄) and two limit switch (K ₁, K ₂) constitute alarm control circuit, by an electronic warning integrated package (IC), two resistance (R ₅, R ₆), two triode (B ₁, B ₂), an electric capacity (C ₁), a transformer (T) and a piezoelectric ceramics (YD) constitute the alarm sound circuit.

5, alarm iron door according to claim 4 lock, it is characterized in that a limit switch (12, K ₁) be normally closed switch, be placed in the rear of dead bolt (3); Another limit switch (9, K ₂) be normally closed switch also, be placed in the rear of uvula (6); Piezoelectric ceramics (YD) is placed in the interior sound equipment chamber (11) of lock housing (18); Three batteries (E) are placed in the interior battery case (1) of lock housing (18); All the other electronic components are placed in the interior electronic unit box (17) of lock housing (18).

6, alarm iron door according to claim 5 lock is characterized in that tapered end (19) has an internal cylinder and lock core (10) outdoors; Also have an oblique tongue (2) to revolve a draw ring (21) manipulation in hand (20) and the door by sphere outdoors.