CN87203696U

CN87203696U - Bicycle theft-proof alarm

Info

Publication number: CN87203696U
Application number: CN 87203696
Authority: CN
Inventors: 王志木
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-03-12
Filing date: 1987-03-12
Publication date: 1987-12-31

Abstract

The utility model relates to an anti-theft alarm device for a bicycle. The device is composed of a lock switch, a touching switch, an audio frequency oscillator, a relay, a loudspeaker, a power source and a housing. The lock switch is placed on an opened position, the alarm device can give an alarm continuously when the bicycle is stolen; consequently, the anti-theft alarm device prevents the bicycle from being stolen, and has low cost.

Description

Bicycle theft-proof alarm

The utility model relates to the warning device of bicycle theft-prevention.Can be installed in and play the anti-theft alarm effect on the various bicycles.

Bicycle in the city does not all have antitheft alarm system now, only uses lock antitheft.Stealing the car people only needs lock to be pried open or bicycle is moved away from the scene can steal car.

The purpose of this utility model is that car people warning device when stealing car continues to report to the police steathily, and is difficult to remove, and arrives in key until the car owner lock-switch is closed, thereby prevented that bicycle is stolen.

Task of the present utility model is that following mode is finished: a leak free housing exposes key hole, and enclosure interior is equipped with lock-switch, touch switch, relay, audio frequency oscillator, loud speaker and a power supply.Lock-switch control power supply, circuit is not worked when lock-switch is put off-position, does not promptly report to the police.When lock-switch is opened (closure state), annunciator is in running order, but does not also report to the police.Have only this moment touch switch once shake-up, each electric loop gets electric, audio frequency oscillator work, and loud speaker sends the sound, promptly reports to the police.Meanwhile, the actuating of relay makes the touch switch self-locking keep warning, turn-offs until lock-switch.

The utility model is with low cost, and applicability is strong, and is easy to implement.

Below in conjunction with accompanying drawing the utility model is further described:

Fig. 1 is the utility model basic circuit.

Fig. 2 is the utility model lock-switch structural representation.

Fig. 3 is the utility model touch switch scheme drawing.

With reference to Fig. 1, when being in scram position, so entire circuit must not reported to the police by electricity as the lock-switch K of source switch.Lock-switch K is in when opening (closure) position, and circuit is in running order, if when touch switch S is not touched, circuit is access failure still, also do not report to the police, but after touch switch S was touched contact, each ring current of circuit is connected, by BG ₁, BG ₁, R ₂, the audio frequency oscillator formed of C starts working, loud speaker Y reports to the police, simultaneously relay J also electronic work, make touch switch K self-locking, keep audio frequency oscillator work, loud speaker Y continues to report to the police, have only lock-switch K to be turned off after, warning is just removed.

With reference to Fig. 2, lock-switch is made up of lock core base 1, lock core 2, group door bolt 4, a pair of electric contact point 3.The Cylinder of the prolongation of lock core 2 cuts away a part, left part Cylinder dial door bolt 4.When lock-switch was in scram position, two electric contact points are contact not, the circuit access failure.Open lock core when lock-switch and revolve and turn to another direction, drive and dial door bolt and also revolve and turns to another direction, the jack-up electric contact point is connected a pair of electric contact point, and circuit gets.

With reference to Fig. 3, touch switch is made up of the touch hammer 8 and the messenger wire 7 etc. that touch circle 6 and garden cylindricality of garden tubular.Touch hammer face center, one garden and connect messenger wire one end, the messenger wire other end encloses the end face garden heart and is connected with touching.Touch the circle end face garden heart and touch circle insulator 5 isolation.Touch circle, messenger wire, touch hammer and all need to make, and messenger wire also need be a flexible material with conducting material.Touch to hammer into shape to be hung in and touch the circle the inside and certain interval is arranged, touch the hammer swing under external force and touch circle collision, each ring current of switch on.

This device is installed in the hidden position of bicycle during use, below seat board, will adjust the installation site during installation this device is not reported to the police in normal operation. The burglar alarm that this device can also be used as other valuables.

Claims

1, a kind of antitheft alarm system that is used for bicycle, be to combine by housing, lock-switch, touch switch, audio frequency oscillator, relay, loud speaker, power supply, it is characterized in that all parts are all in housing, and housing only leaves the key hole of lock-switch, its lock core 2 of lock-switch has a prolongation lock core to dial door bolt 4, touch switch is by touching circle 6 and touch hammer and 8 form, lock-switch K, touch switch S, power series, and the open contact of relay J and touch switch also connect.

2, antitheft alarm system according to claim 1 is characterized in that lock core dials the side of door bolt pair of electrodes contact 3 is arranged.

3, antitheft alarm system according to claim 1 is characterized in that the hammer that touches of touch switch is touching circle the inside, and between certain interval is arranged.