CN2095252U - Three safety anti-theft lock for bicycle - Google Patents

Abstract

The utility model relates to a three safety anti-theft lock for a bicycle, comprising a lock chamber, a lock handhold, and a lock frame. The utility model is characterized in that the travel direction of a lock handhold on the lock frame is from left to right which is opposite to the original bicycle lock; an alarming device is arranged in the lock chamber; a chain inserting opening is arranged on the lock chamber; the chain having length of 2 meters is inserted in the chain inserting opening and is electrically connected with the alarming device of the lock chamber; when the lock is destroyed by a thief, the alarm sound can be sent. The utility model has the advantages of sensitive control, simple structure, low cost, and anti-prizing and anti-theft performances.

Description

Three safety anti-theft lock for bicycle

The utility model relates to anti-theft lock for bicycle, particularly three insurance anti-theft lock for bicycle.

Anti-theft lock for bicycle in the past has induction type, vibrating type or the like, but has ignored of most important most critical, is exactly the improvement to the original lock of bicycle.A common fault of original bicycle lock, exactly when locking, the moving direction of lock handle on the lock frame is from right to left, last lock handle is near the lock chamber, at this moment, the lock pipe that is connected with lock handle moves through bicycle rear simultaneously in the pipe of lock frame, locks then.But it is the fulcrum of pry with the edge of locking the chamber that the thief is easy to lock handle, one puts forth one's strength slightly, lock handle just separates with the lock chamber, and can not report to the police, even the thief utilizes the bicycle bell lid pull down to make pry, also is easy to lock handle separated with the lock chamber reach the purpose of stealing bicycle.At this situation, need improve original bicycle lock.

The purpose of this utility model provides a kind of three insurance anti-theft lock for bicycle, improves anti-theft feature.

The utility model is finished as follows: the moving direction of lock handle on the lock frame of original bicycle lock changed into from left to right, and lock handle allows the robber can't make the fulcrum of pry with lock edge, chamber away from the lock chamber during locking.Again at the indoor installation warning device of lock, promptly at the indoor fitting printed circuit board of lock, electronic switching circuit and power amplifier warning circuit are installed on it, electrical schematic diagram by warning device is electrically connected, and circuit power switch is communicated with lock chamber mechanical switch, just key is opened lock handle, and electronic switch is cut off the electricity supply; Key locking lock handle is then connected the warning device circuit automatically, and warning device and lock chamber electric insulation larceny are taken place, the warning of promptly sounding.

For the ease of park bicycle one or several the time burglar alarm, 1.5～2 meters long metal bracelet in addition and the chain socket that are electrically connected with warning circuit are then arranged on the lock chamber.

The utility model has following advantage than conventional art: lock fulcrum when removing picking lock, increase anti-theft capability from left to right because lock is improved to lock handle 1.; 2. the very high warning device of sensitivity is arranged in the lock chamber, make the thief be difficult for setting about; 3. simple in structure, control is sensitive, and cheap cost is low.

Further describe below in conjunction with accompanying drawing.

Fig. 1 is a structure chart of the present utility model.

Fig. 2 is electronic switch and warning circuit electrical schematic diagram.

Fig. 3 is the another kind of structure chart of the utility model.

With reference to Fig. 1, three insurance anti-theft lock for bicycle, basic profile is with original the same, lock chamber (1) is arranged, locks frame (2), lock handle (3) composition, but it is carried out significant improvement.The moving direction of lock handle (3) on lock frame (2) from left to right, and the lock handle (3) in the lock frame (2) is locked from top to bottom, with original opposite, so just in time make lock handle (3) away from lock chamber (1), making the robber can't be fulcrum with lock edge, chamber (1) with pry, increases anti-theft capability greatly.Simultaneously, fitting printed circuit board in lock chamber (1) above the electronic component of the electronic switching circuit of warning device and power amplifier warning circuit is welded on, is electrically connected by Fig. 2 circuit.Warning device and lock chamber (1) electric insulation are preferably made the plastic casing sealing.The power switch of warning device and lock chamber mechanical switch K ₁Be communicated with, just after key injects lock chamber (1), when rotation makes lock handle (3) locking, start the power supply of warning device circuit simultaneously, make warning device in working order; When unblanking, cut off its power supply automatically.Also be provided with metal bracelet socket (4) in the lock chamber (1), in order to pin one or several bicycle and alarming anti-theft.

With reference to Fig. 2, triode T ₁And T ₂And resistance R ₁, R ₂Form power switch circuit, pass through K switch ₂, K ₃Mechanism is connected with lock chamber (1), at ordinary times T ₁Base stage pass through K switch ₁Link to each other with emitter stage, therefore two pipes all are in cut-off state, when having destroyed K artificially ₂, K ₃Present condition, on-off circuit will be connected power supply, impel power amplifier work to send alarm sound.Warning circuit is formed power amplifier by the TC integrated package, by being electrically connected with loudspeaker y, sends alarm sound.Component: T ₁-9013, T ₂-9012, R ₁180K～560K, R ₂3K～10K, y-100mW, TC-9561, power supply are battery 3-6V.

With reference to Fig. 3, be antitheft in order to be applied on automobile, the motorcycle, another kind of structure of the present utility model as a big sections lock, but is installed warning device and chain socket in the lock chamber (1).Electronic circuit in this warning device can also be used in strongbox, home-use door lock, cabinet lock or the like place.Chain is about 1.5-2 rice, and metal is made, and goes up warning circuit with lock chamber (1) and is electrically connected, and inserts the chain socket (4) on the lock chamber (1) during use, and chain wants bolt on pillar certainly, prevents that the robber from destroying, with audible alarm.

Claims (3)

1, three insurance anti-theft lock for bicycle are made up of lock chamber (1), lock frame (2), lock handle (3), it is characterized in that:

A, lock handle (3) moving direction on lock frame (2) from left to right, during locking, lock handle (3) is away from lock chamber (1);

B, in lock chamber (1) fitting printed circuit board, warning device electronic switching circuit and power amplifier warning circuit are installed it on, be electrically connected by illustrating circuit, and circuit power switch and lock chamber mechanical switch K; Be communicated with warning device and lock chamber (1) electric insulation.

2,, it is characterized in that electronic switching circuit in the said warning device is by triode T according to the said theftproof lock of claim 1 ₁, T ₂And resistance R ₁, R ₂Form, on printed circuit board (PCB), be electrically connected according to the diagram circuit; The power amplifier warning circuit is made of TC integrated package and loudspeaker, is electrically connected by the diagram mode of connection.

3,, it is characterized in that locking chamber (1) and go up the metal bracelet and the chain socket (4) that also have a long 1.5-2 rice that is electrically connected with warning circuit according to claim 1 or 2 said theftproof locks.

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