CN2194398Y

CN2194398Y - Theft-proof lock for bicycle

Info

Publication number: CN2194398Y
Application number: CN 94202357
Authority: CN
Inventors: 罗宗彦
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-01-22
Filing date: 1994-01-22
Publication date: 1995-04-12
Anticipated expiration: 2004-01-22

Abstract

The utility model relates to an anti-theft alarm lock for a bicycle. The anti-theft alarm lock for a bicycle is fixed on the upper part of the inclined beam of a bicycle. A locking hole steel plate which is corresponding to a locking rod is fixed on a front fork pipe. After the lock rod is pressed into a lock plate hole, the front wheel of the bicycle and a bicycle body form fixation with a definite angle, the bicycle only can be rotated on the original place, and the bicycle can not be pushed. When a thief tries to prize a locking hole plate, disassemble the lock body, or open a battery case cover to damage the lock body, alarm sound can be sent out. After a key is used for unlocking, the anti-theft alarm lock for a bicycle also has the function of an electric whistle. The electronic circuit of the anti-theft alarm lock for a bicycle belongs to low power consumption, and a static power source only has 2 mu A. The anti-theft alarm lock for a bicycle can be installed on various new and old bicycles. When the anti-theft alarm lock for a bicycle is installed, the bicycle body is not needed to be disassembled and modified. The anti-theft alarm lock for a bicycle is easy to be maintained, and is suitable for being volume-produced.

Description

Theft-proof lock for bicycle

The utility model relates to a kind of theft-proof device for bicycle, particularly a kind of anti-theft lock for bicycle that can pin bicycle head.

Prior art of the present utility model is that a kind of its lock body of front fork pre-buried type bicycle lock and lock core are installed in the bicycle front fork axis hole, and on tripod and front fork axial wall each keyhole and lockpin hole.Lockpin hole under the lock core effect.When locking, lock pin inserts the front fork axis hole, lock pin is stuck under the lock core effect, lock pin stops handle-bar to rotate.Though this kind scheme has disguised stronger benefit, can't install thereby limit the scope of application for used car.

The purpose of this utility model is a kind of theftproof lock that can stop turning of bicycle of design, can be widely applicable for new old bike.

Design scheme of the present utility model is that lock body is fixed in bicycle cant beam top, and selvage is fixed on the bicycle front fork, inserts the purpose that selvage reaches the control turning of bicycle by locking bar.

The utility model lock body is selected the common spring lock core for use, and locking bar is a straight-bar.Return spring is arranged at top, and the locking bar lower end can be inserted in the jam plate hole.

The utility model also further is designed to have the newspaper of warning function and steals lock, and for this reason, there is a vertical core at the locking bar center, the hole is built-in with drive link, and drive link top has drive link spring, drive link upper end that the transmission lever pin is arranged, and there is K switch transmission lever pin upper end ₂, K ₂Can control a warning circuit.It moves up downwards because of locking bar when drive link, and makes K by the transmission lever pin ₂Disconnect, warning circuit promptly enters state on duty, and when attempting to prize the hole of uncaging, dismounting lock body or levering up locking bar as if row robber person, drive link is subjected to spring action and moves down, and makes K by the transmission lever pin ₂Spare time closes, and triggers warning circuit and sends chimes of doom.

The utility model also can be divided into a K switch at battery case lid ₃, K ₃Also can with K ₂In parallel, after battery case lid compresses, K ₃Disconnect, warning circuit is in state on duty, when battery case lid is opened in row robber person attempt, and K ₃Spare time closes, and triggers warning circuit and sends chimes of doom.

The utility model makes full use of warning circuit in order to make lock when opening state, also is provided with a K switch on the lock core limit ₁, K ₁Directly stir locking back K by lock core ₁Be the warning circuit power supply, the back of unblanking is the electric whistle circuit supply.K _1-1Be to report to the police and the electric whistle changeover switch K _1-2Be to select acoustic(al) switch, AN is the electric whistle button, presses AN when advancing, will send electric whistle sound.

The utility model has the advantages that applied widelyly, easy for installation, also have warning function, and also can be used as electric whistle when carrying out and use.

Fig. 1 is the utility model structural representation.

Fig. 2 is provided with figure for the utility model alarm actuating contact.

Fig. 3 is the utility model warning circuit figure.

Fig. 4 is the utility model scheme of installation.

Embodiment 1: bicycle theft-prevention lock body 1 is fixed in cant beam 9 tops, and the top of cant beam is that car puts the beams in place 12, and selvage 2 is fixed on the front fork, and lock body is return spring to be arranged on common spring lock core, the locking bar 4 and be straight-bar.Need only during use by key and will can prevent that handle-bar from turning in the locking bar 4 bottoms insertion selvage 2.

Embodiment 2: on the basis of example 1, at locking bar 4 center systems one vertical core, its built-in drive link 6, drive link 6 tops have driving spring 8, drive link 6 upper ends to be equipped with transmission lever pin 7, transmission lever pin 7 upper end contact switch K ₂, K ₂Be communicated with warning circuit.This scheme can protect lock body and selvage to be prized.

Embodiment 3: on example 2 bases, at lock core a K switch is set ₁, K ₁Directly stir locking back K by lock core ₁Be the warning circuit power supply, the back of unblanking is the electric whistle circuit supply.By changeover switch K _1-1With select acoustic(al) switch K _1-2, can report to the police, also can be used as electric whistle.

Embodiment 4: for preventing the destroyed warning function that loses of battery case lid, with K ₂And connect a K switch ₃Be connected on the battery case lid.When battery case lid is opened in attempt, just can report to the police, warning circuit is as shown in Figure 3.

Claims

1, a kind of anti-theft lock for bicycle is characterized in that being made of lock body that is fixed in bicycle cant beam top (1) and the selvage (2) that is fixed in bicycle front fork.

2, anti-theft lock for bicycle according to claim 1 is characterized in that lock body (1) is made up of lock cylinder (3), locking bar (4), locking bar return spring (5), and lock body return spring (5) is positioned at locking bar (4) upper end.

3, anti-theft lock for bicycle according to claim 2, the hole that it is characterized in that locking bar (4) center is built-in with drive link (6), drive link spring (8) is arranged at drive link (6) top, there is transmission lever pin (7) drive link (6) upper end, and there is the contact switch K that can trigger warning circuit transmission lever pin (7) upper end ₂

4,, it is characterized in that lock core (3) connects double-point double-throw switch K according to claim 2 or 3 described anti-theft lock for bicycle ₁, K ₁Can connect warning circuit and or electric whistle circuit.

5,, it is characterized in that directly gauge tap K of battery case lid (10) according to claim 2 or 3 described anti-theft lock for bicycle ₃, K ₃Can connect warning circuit.

6, anti-theft lock for bicycle according to claim 4 is characterized in that also being provided with one in the warning circuit selects acoustic(al) switch K _1-2With changeover switch K _1-1