CN2074347U

CN2074347U - Burglar alarm for bicycle

Info

Publication number: CN2074347U
Application number: CN 90218264
Authority: CN
Inventors: 于怀海
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-08-19
Filing date: 1990-08-19
Publication date: 1991-04-03

Abstract

The utility model discloses an anti-theft alarm for a bicycle, which is formed by adopting an effective measure that a spring type probe, an alarm circuit, a lock switch, and special alarm wire are used to make a bicycle lock skillfully combine with a break type anti-theft alarm skillfully. The utility model has the advantages that the structure is simple; the size is small; the fabrication is easy; the anti-theft alarm for a bicycle is easy to be refit on the bicycle lock; the operation is convenient; the performance is reliable; the anti-theft alarm for a bicycle is safe and can prevent from theft; the anti-theft alarm for a bicycle alarms in time; the anti-theft alarm for a bicycle is advanced and applicable. The utility model is an ideal anti-theft alarm for a bicycle at present.

Description

Burglar alarm for bicycle

The utility model discloses a kind of burglar alarm of for bicycle.

At present, the safe antitheft measure of bicycle is still the employing bicycle lock.Though various forms of bicycle locks are successively asked the city in succession, lock is pried open, and the phenomenon that bicycle is lost still occurs repeatedly.Trace it to its cause, consider from the safe antitheft angle, it is that it is pried open the one of the main reasons of losing easily that bicycle lock lacks burglar alarm.

The purpose of this utility model is exactly in order to overcome the defective of existing apparatus, to compensate its defect, and propose a kind ofly to be skillfully constructed, the burglar alarm of simple in structure, easy to manufacture, with low cost, reliable in function, the convenient for bicycle that is suitable for.

The utility model is adopted an effective measure and is made bicycle lock realize safety alarm with ingenious combination of breakaway-element burglar alarm.Mainly be at bicycle lock lockhole end mounting spring formula probe, and be connected and installed in warning circuit in the alarm box of the back fork of bicycle lock back side by alarming line, the warning circuit switch adopts lock-switch.The spring probe is that outer spring is higher than inner spring by the cluster spring that is fixed on the shape rigid insulation base plate of garden, and the outer spring welded top has the garden copper sheet, and outer cover is formed with elastic insulated overcoat.Two the end of a thread that the outer spring of probe and inner spring are connected to alarming line one end.Alarming line then is to adopt enamel-cover copper wire line, in wrap up in harder rubber layer or plastic layer, wrap up in outward that the braided glass filament layer makes, can prevent from like this to lancinate or burn and damage, or adopt common plastics copper wire line.The alarm lock-switch adopts an end to have the lock core of projection, and contact or disengaging are fixed on the weld tabs contact on the alarm box plate when utilizing the cylinder cam rotation, realize the closed or disconnection of circuit.The alarm box of this device can adopt materials such as plastic plate, bakelite plate or sheet iron plate to make.The insulating base of spring probe can adopt plastic plate, bakelite plate or other material to make.The overcoat of probe then can adopt the elastic caoutchouc cover to make.

Its operating principle is: when the car owner uses this device, and first locking bicycle lock, locking bar end compressed spring type probe, outer spring contacts with inner spring, and probe is connected warning circuit, and alert circuit theory diagrams appear in the newspapers.With the lock-switch on the key rotation alarm box, cylinder cam is contacted with the weld tabs contact again, connect the alarm power supply, extract key out, alarm promptly is in alert status.When the thief pries open lock, which kind of mode that don't work, locking bar must withdraw from lockhole, cluster spring restores to the original state, and has disconnected the alarming line circuit, and electric current then excites controllable silicon SCR to be switched on through resistance R 1, diode IN4148, loudspeaker sends chimes of doom, and reminds people is noted, the frightened courage of robber's heart is quivered.Have only the key of using rotary locking cylinder, its projection and weld tabs contact are broken away from, promptly disconnect the alarm power supply, could remove warning.When using bicycle, the car owner, drives again to lock earlier with key opening alarm device Circuit lock switch.

The utility model is simple in structure, and volume is little, and is easy to manufacture, and be suitable on bicycle lock and reequip, safe antitheft, dependable performance is reported to the police in time, and is advanced and applicable, is present comparatively desirable bicycle safe anti-theft device.If suitably reequip, also be applicable to the safe antitheft of other occasion.

The drawing of accompanying drawing is described as follows:

Fig. 1, be bicycle anti-theft alarm device bicycle lock spring sonde configuration sketch.

Fig. 2, be bicycle anti-theft alarm device alarm box structure diagram.

Fig. 3, be bicycle anti-theft alarm device warning circuit schematic diagram.

The utility model is described in further detail below in conjunction with accompanying drawing embodiment:

This device comprises bicycle lock (1) and alarm box (11) two large divisions.Bicycle lock (1) part; Rivet (8) is gone up and is adopted Spring Card (9) (or alternate manner) mounting spring formula probe (2) in lock lockhole one stomidium.This probe (2) is by plastic bottom board (3) and fix cluster spring on it, outer spring (4) high level cadre's inner spring (5), and outer spring (4) top is welded with thin garden copper sheet (6), and outer cover is formed with elastic caoutchouc overcoat (7).Outer spring (4) and inner spring (5) end are connected two the end of a thread of alarming line (10) one ends respectively, and alarming line (10) other end inserts the warning circuit in the alarm box (11).Alarming line (10) adopts enamel-cover copper wire line, in wrap up in harder rubber layer, wrap up in the braided glass filament layer outward and make, penetrate from the punching of lock base plate, line is not exposed.Alarm box (11) is installed on back fork of bicycle bicycle lock (1) back side and just locates on the upper side.Alarm box (11) adopts hard plastic board to make.Mainly be fixed with loudspeaker (12), alarm circuit plate (13), lock-switch (14) and fixedly weld tabs contact (15), battery spring card (16) etc. on the box inner bottom plating.Lock-switch (14) adopts general lock core, and the lock core other end projection of burn-oning forms, and when inserting key and making the lock core rotation, projection contact with weld tabs contact (15) or breaks away from, and makes warning power circuit closure or disconnection.Alarm circuit adopts the breakaway-element burglar alarm, and circuit is referring to Fig. 3.The warning power supply adopts No. 5 dry cells of 4 joints to be composed in series, and its supply voltage is 6V.

Claims

1, a kind of bicycle anti-theft alarm device comprises bicycle lock (1), breakaway-element burglar alarm (12), it is characterized in that:

At bicycle lock (1) lockhole end mounting spring formula probe (2), this probe (2) is by the cluster spring that is fixed on the garden shape rigid insulation base plate (3), and outer spring (4) is higher than inner spring (5), and outer spring (4) top is welded with garden copper sheet (6), outer cover is formed with elastic insulated overcoat (7)

Probe (2) is joined by the interior warning circuit of alarming line (10) that connects outer spring (4) and inner spring (5) and the alarm box (11) that is installed on bicycle lock (1) back side, alarming line (10) adopts enamel-cover copper wire line, in wrap up in harder rubber layer or plastic layer, wrapping up in the braided glass filament layer outward makes, or employing plastics copper wire line

The warning circuit switch is lock-switch (14), is to adopt an end to have the lock core of projection contact or break away from the weld tabs contact (15) that is fixed on alarm box (11) base plate when utilizing the cylinder cam rotation, the closed of power circuit or disconnect of realizing reporting to the police.

2, bicycle anti-theft alarm device according to claim 1 is characterized in that the garden shape rigid insulation base plate (3) of fixed combination spring in the probe (2) can adopt plastic plate or bakelite plate.

3, bicycle anti-theft alarm device according to claim 1 is characterized in that probe (2) outside elastic insulated covers (7) can adopt rubber sleeve.

4, bicycle anti-theft alarm device according to claim 1 is characterized in that warning circuit lock-switch (14) can adopt the general lock core end projection of burn-oning to make.

5, bicycle anti-theft alarm device according to claim 1 is characterized in that alarm box (11) can adopt plastic plate, bakelite plate or sheet iron plate material to make.