CN2224251Y

CN2224251Y - Anti-theft alarming lock

Info

Publication number: CN2224251Y
Application number: CN 95213888
Authority: CN
Inventors: 罗绍勇
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-12
Filing date: 1995-06-12
Publication date: 1996-04-10
Anticipated expiration: 2005-06-12

Abstract

The utility model relates to an anti-theft alarming lock. The utility model is characterized in that a double-tongue lock is additionally provided with a probe, a driving and self-locking rod, an action switch and an alarming device. One end of the driving and self-locking rod is positioned on the probe, and the other end contacts the action switch. The utility model the compressing probe of which can not cut off power supply after giving an alarm has the advantages of simple structure, low cost, loud sound, difficult destruction, etc.

Description

A kind of anti-theft alarm lock

The utility model relates to a kind of anti-theft alarm lock.

Early stage door lock is single tongue structure, just opens easily without key.Developed two tongue locks afterwards: except that oblique tongue, also added safety tongue, the latter locks and unblanks by key.Though two tongue locks when the burglar forces open the door, do not play a part too big than single tongue lock safety yet.

Can report to the police automatically when the purpose of this utility model provides a kind of improper opening the door, and warning device is difficult for ruined anti-theft alarm lock.

The utility model is to lock at two tongues to increase probe, transmission and compositions such as self-lock rod, step switch and warning device.

The utility model will be further described below by drawings and Examples.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the utility model each position component schematic diagram on the alert;

Fig. 3 is each position component schematic diagram of the utility model alarm condition;

Fig. 4 is the utility model warning device circuit diagram.

With reference to Fig. 1～3, the utility model is locked (1), probe (2), transmission and self-lock rod (3), step switch (4) and warning device (5) by two tongues and is formed; Probe (2) is located at safety tongue (6) next door, pushes the doorframe direction to by spring (7); Transmission and self-lock rod (3) middle part is provided with fulcrum (8), and transmission and self-lock rod (3) one ends are positioned at probe (2), and are provided with triangle hypotenuse (3a), and the other end contacts with step switch (4); Transmission and self-lock rod (3) one ends also are provided with tension spring (9); Safety tongue (6) is provided with a card post (10).

With reference to Fig. 4, warning device (5) is made up of alert sound IC (11), amplifying circuit (12), step-up transformer (13) and buzzer (14), the output that the output of alert sound IC (11) is access to amplifying circuit (12), amplifying circuit (12) is access to the primary side of step-up transformer (13), and the secondary end of step-up transformer (13) is access to buzzer (14).

Step switch (4) is used normally closed switch.In the unlocking condition (see figure 1), safety tongue (6) is regained, and the card post (10) on the safety tongue (6) promotes transmission and self-lock rod (3), makes step switch (4) pressurized, step switch (4) open circuit, and warning device (5) is not worked.When (see figure 2) at closing time, probe (2) is contracted by the doorframe compression, and lock with key this moment, and safety tongue (6) stretches out, but block (2) because transmission and self-lock rod (3) quilt are popped one's head in, and step switch (4) is pressurized still, and switch (4) is still opened a way.The utility model stands alert this moment.

When the burglar forces open the door, probe (2) has not been subjected to the doorframe compression and has stretched out (see figure 3) this moment, transmission this moment and self-lock rod (3) are subjected to the pulling force departure motion switch (4) of spring (9), and step switch (4) closure makes warning device (5) connect power supply and sends alert acoustic alarm.

In order to check at ordinary times whether battery lost efficacy and can circuit work, also be provided with self-test switch (15), self-test switch (15) is connected in parallel with step switch (4).

The utlity model has following advantage: (one) is simple in structure, and cost is low; (2) sound is loud and clear, Survivable; Can not cut off the electricity supply when (three) reporting to the police rear recompression probe (2), only have with key and open Lock could powered-down.

Claims

1. an anti-theft alarm lock is characterized in that being made up of two tongue locks (1), probe (2), transmission and self-lock rod (3), step switch (4) and warning device (5); Probe (2) is located at safety tongue (6) next door, pushes the doorframe direction to by spring (7); Transmission and self-lock rod (3) middle part is provided with fulcrum (8), and transmission and self-lock rod (3) one ends are positioned at probe (2), and are provided with triangle hypotenuse (3a), and the other end contacts with step switch (4); Transmission and self-lock rod (3) one ends also are provided with tension spring (9); Safety tongue (6) is provided with a card post (10).

2. according to the described anti-theft alarm lock of claim 1, it is characterized in that warning device (5) is made up of alert sound IC (11), amplifying circuit (12), step-up transformer (13) and buzzer (14), the output that the output of alert sound IC (11) is access to amplifying circuit (12), amplifying circuit (12) is access to the primary side of step-up transformer (13), and the secondary end of step-up transformer (13) is access to buzzer (14).

3. according to the described anti-theft alarm lock of claim 1, it is characterized in that also being provided with self-test switch (15), self-test switch (15) is connected in parallel with step switch (4).