CN2182853Y - Theft-proof and alarming lock for bicycle - Google Patents

Abstract

Disclosed is a theft-proof alarm lock for bicycles, comprising a lock head, a lock bolt, a battery, a horn, an alarm circuit, a leading conductive loop, a plurality of pressure closing switches, a plurality of pressure breaking switches and a plurality of contact points. When the lock is prized by someone, especially when the leading conductive loop is sawn off or sheared or when the lock bolt is poked, the utility model can send out alarm.

Description

Theft-proof and alarming lock for bicycle

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

At present, existing plurality of bicycles anti-theft alarm lock is applied for a patent, as CN88212087U and 89221267.5.These locks all utilize electronic circuit to realize anti-theft alarm function preferably.But comprehensive these locks, the pick-proof ability of the lock housing that has own is relatively poor, the battery altering that has difficulty or can take out easily and lose alert capability.Especially, disclose the bolt or then be difficult to report to the police during with the disconnected locking bolt of the mean tricks of frequent use saws (cutting) of unblanking with specific process as the thief.

The purpose of this utility model, be to provide a kind of pick-proof ability own better, battery can change in the back of unblanking, particularly sawed that (cutting) disconnected or lock core is not opened and locking bolt is dialled the bicycle anti-theft alarm lock that Hui Houneng gives the alarm along the loop of locking bolt.

The utility model is achieved in that draws a loop along the locking bolt direction with reference to figure one, two, three by warning circuit, power switch closure when locking, and make this moment the loop of power amplifier input signal short circuit also closed, so can not report to the police; But when this loop disconnects, then report to the police.

With reference to accompanying drawing one, this lock comprise shell 1., tapered end 2., dead bolt 3., battery 4., wiring board 5., loudspeaker 6., reinforce angle bar 7., locking bolt 8., lead 9., contact 10. (11) and plastic cement sleeve (12).

Shell is made up of last lower casing, at the suitable position of last lower casing folded edge is arranged respectively, and lower casing inserts along the DR direction and fastens the back mutually with upper casing and fixed by screw F1, F2, F3, F4, and wherein, F1 is used for lock is fixed to car body.Like this, do not opening lock and under the situation of taking off on the car body, be difficult to pry open.

Among the figure one, S1, S2, S4, S5 be electronic circuit commonly used press off switch (pressurized closure, decompression disconnect), S3 is for breaking switch (with to press off switch opposite).With reference to figure two, S1 is a power switch.S2, S4, S5 are the pick-proof switch.S3 is a whether operate as normal switch of checkout gear.

With reference to accompanying drawing two, when lock was locked, dead bolt simultaneously a) fastened locking bolt; B) connect power supply.With reference to accompanying drawing three, when lock is locked, O, the G two ends of drawing by the power amplifier signal input part, by the O-S2-S3-contact 10.-lead 9.-contact (11)-S5-lead 9.-S4-G loop and closure, signal is by short circuit, and inactivity output has only very little current drain.

When lock is locked, as long as lock core is not opened, then anywhere disconnect on the loop, even cut, cut off or disclose and hold all and can send into alarm signal, thereby reported to the police to power amplifier.Open with key and to lock then power switch and disconnect, sound all clear or cancel warning function.

The effect that breaks switch S 3 is whether checkout gear is working properly.

Leave in following drain pan in loudspeaker opening and detection hole etc., and put plastics and turn in one's mind pad in case the rain erosion warning circuit in lock body.

Claims (3)

1, a kind of bicycle anti-theft alarm lock comprises lock housing, tapered end, locking bolt, battery, loudspeaker, warning circuit.It is characterized in that drawing along the conductive loop of locking bolt direction by the power amplifier signal input part, this loop along the locking bolt direction by some press off switch, break switch, contact and lead form;

2,, it is characterized in that drawing conductive loop by the power amplifier signal input part according to the described device of claim 1;

3,, it is characterized in that drawing loop around the locking bolt direction according to the described device of claim 1.

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