CN2217073Y

CN2217073Y - Multi-function theft-proof lock

Info

Publication number: CN2217073Y
Application number: CN 95203998
Authority: CN
Inventors: 曹建强
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-03
Filing date: 1995-03-03
Publication date: 1996-01-10
Anticipated expiration: 2005-03-03

Abstract

The utility model relates to a multifunctional theft-proof lock, comprising a theft-proof lock body. The utility model is characterized in that the inner part of an electric appliance box at the back part of the theft-proof lock body is provided with a doorbell circuit, a whistle circuit, a signal amplification circuit and a buzzer, the normally closed contact K 2 of a double-contact micro-switch is arranged at the back side of a safe tongue 6 in the lock body, and the normally open contact K 1 of the double-contact micro-switch is arranged at the lower side of a turn knob shifting fork 9 in the lock body. The utility model has the advantage that the multifunctional theft-proof lock collects an electronic doorbell, an electronic warning and a mechanical safety mechanism into one body.

Description

Multifunction anti-theft lock

The utility model relates to a kind of multifunction anti-theft lock, and this lock current collection cervical orifice of uterus bell, electronic warning and machine insurance mechanism are in one.

Three commonly used insurance mechanical door locks mainly constitute antitheft lock by shell, dead bolt, safety tongue, knob shift fork, and this lock only can be used for general antitheft, can not report to the police, and function singleness.

The purpose of this utility model is to propose a kind of multifunction anti-theft lock, and this lock had both had machine insurance mechanism, has electronic alarm device again, and has both the function of doorbell.

The purpose of this utility model is achieved in that a kind of multifunction anti-theft lock, and doorbell circuit and siren circuit are housed in the electrical equipment box at antitheft lock rear portion, and the input E of doorbell circuit is electrically connected with often opening touching button, and through resistance R ₁Connect power cathode, the output F of doorbell circuit is through crystal diode D and transistor BG ₁Base stage be electrically connected triode BG ₁Emitter stage and transistor BG ₂Base stage be electrically connected transistor BG ₂Colelctor electrode be electrically connected with output transformer B primary coil, the secondary coil of output transformer meets buzzer A, the control end H of siren circuit and transistor BG ₃Base stage and BG ₁Base stage be electrically connected transistor BG ₃Emitter-base bandgap grading be connected in series the normally closed interlock of double-contact microswitch with inter-collector, collector terminal is electrically connected with positive source through double-contact microswitch normally open contact, transistor BG ₃Base stage through resistance R ₂Connect power cathode, between the both positive and negative polarity of power supply and connect filter capacitor, the normally closed interlock of double-contact microswitch is loaded on the safety tongue rear in the lock body, and the normally open contact of double-contact microswitch is loaded on the knob shift fork below in the lock body.Machine insurance of the present utility model mechanism has three insurance functions, when this lock is in safety position, safety tongue disconnects the normally closed interlock of double-contact microswitch, and the normally open contact of the closed double-contact microswitch of knob shift fork is when lock body is subjected to than big bang, the normally closed interlock that disconnects can produce the closure of moment, connect the siren circuit, send alarm sound equipment, when offender's tool using is pried open door greater than 85 decibels, as long as this lock is not destroyed, sound equipment still can give the alarm.

Compared with the prior art the utility model has current collection cervical orifice of uterus bell, electronic warning and machine insurance mechanism in the advantage of one.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1, structural representation of the present utility model

Fig. 2, scheme of installation of the present utility model

The scheme of installation of Fig. 3, double-contact microswitch (Fig. 1 is local to be amplified)

Fig. 4, electrical schematic diagram of the present utility model

Referring to accompanying drawing, multifunction anti-theft lock of the present utility model constitutes antitheft lock by shell 2, dead bolt 8, safety tongue 6, knob shift fork 9, a common doorbell circuit TM802C and a common siren circuit TM806A are housed in the electrical equipment box 3 at this lock body rear portion, the defeated eight end E of doorbell circuit with often open touching button K ₃Be electrically connected, and through resistance R ₁Connect power cathode, the output F of doorbell circuit is through crystal diode D and transistor BG ₁Base stage be electrically connected triode BG ₁Emitter stage and transistor BG ₂Base stage be electrically connected, constitute signal amplification circuit, transistor BG ₂Colelctor electrode be electrically connected with output transformer B primary coil, the secondary coil of output transformer meets buzzer A, the control end H of siren circuit and transistor BG ₃Base stage and BG ₁Base stage be electrically connected transistor BG ₃Emitter-base bandgap grading be connected in series the normally closed interlock K of double-contact microswitch SK with inter-collector ₂, collector terminal is through double-contact microswitch normally open contact K ₁Be electrically connected transistor BG with positive source ₃Base stage through resistance R ₂Connect power cathode, between the both positive and negative polarity of power supply and meet filter capacitor C, the normally closed interlock K of double-contact microswitch ₂, be loaded on safety tongue 6 rears in the lock body, the normally open contact K of double-contact microswitch ₁, be loaded on knob shift fork 9 belows in the lock body.The cover plate 1 of this lock is fixing with door-plate 4, and the door-plate outside is installed doorbell panel 5 and often opened touching button, and is connected with doorbell circuit with lead 7.Use No. 5 batteries of three joints to make power supply, can use about half a year.

Claims

1, a kind of multifunction anti-theft lock has antitheft lock, it is characterized in that, doorbell circuit and siren circuit are housed in the electrical equipment box at antitheft lock rear portion, the input E of doorbell circuit with often open touching button K ₃Be electrically connected, and through resistance R ₁Connect power cathode, the output F of doorbell circuit is through crystal diode D and transistor BG ₁Base stage be electrically connected triode BG ₁Emitter stage and transistor BG ₂Base stage be electrically connected transistor BG ₂Colelctor electrode be electrically connected with output transformer B primary coil, the secondary coil of output transformer meets buzzer A, the control end H of siren circuit and transistor BG ₃Base stage and BG ₁Base stage be electrically connected transistor BG ₃Emitter-base bandgap grading be connected in series the normally closed interlock K of double-contact microswitch SK with inter-collector ₂, collector terminal rises through the double-contact fine motion and closes normally open contact K ₁Be electrically connected transistor BG with positive source ₃Base stage through resistance R ₂Connect power cathode, between the both positive and negative polarity of power supply and meet filter capacitor C, the normally closed interlock K of double-contact microswitch ₂, be loaded on safety tongue (6) rear in the lock body, the normally open contact K of double-contact microswitch ₁, be loaded on knob shift fork (9) below in the lock body.