CN2175441Y

CN2175441Y - Theft-proof alarming device for bicycle

Info

Publication number: CN2175441Y
Application number: CN 93220461
Authority: CN
Inventors: 张强
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-07-28
Filing date: 1993-07-28
Publication date: 1994-08-24
Anticipated expiration: 2003-07-28

Abstract

The utility model relates to a theft-proof alarming device for a bicycle. In order to improve the theft-proof correctness and reliability of the bicycle, a combined switch is adopted and is composed of a mechanical code dialing switch and an electronic switch, the code control is used, and an alarm triggering device adopts two triggering modes of the short circuit alarm and the broken circuit alarm; thereby, the alarm is difficult to be turned off after the alarm is generated. When the utility model is used, the stealing behavior and the bicycle which is inadvertently touched can be distinguished; so the false alarm is prevented. A lock body adopts a chain lock, and a casing is the double-layer sealing structure. The utility model has the advantage of wide application range. The utility model can be used for the theft-proof alarm of bicycles and motorbikes, and the utility model can also be used for the theft-proof alarm of egression and other articles.

Description

Theft-proof alarming device for bicycle

The utility model is a kind of burglar alarm, is applicable to the antitheft of bicycle and other article.

The bicycle anti-theft alarm device of Xiao Shouing mainly is old-fashioned slotting lock in the market, and the warning volume is little, also can report to the police after touching bicycle unintentionally, causes wrong report.This warning device adopts tumbler switch, closes after touching warning easily.

The purpose of this utility model provides a kind of accuracy height, effective of reporting to the police, and is the main multi-usage alarm that also can take into account other warning with the bicycle theft-prevention.

The purpose of this utility model is to realize like this.Burglar alarm is made up of switch, alarm triggering device, latching circuit, articulatory system and housing.Switch makes code switch by mechanical type and electronic switch is formed.Each of making code switch is relatively independent, can be respectively applied for control electronic switch, power supply and warning and trigger one of three kinds of control modes or its arbitrary combination, thereby make switch can use cipher control.One latching circuit is arranged in lock body, and after triggering warning device, latching circuit is self-locking at once, is difficult for being turned off, and has improved the reliability of reporting to the police.Alarm triggering device is short-circuit alarming and two kinds of triggering modes of breaking alarming.Simultaneously, the utility model has also been done bigger improvement to articulatory system:, and boost through step-up transformer the multipole amplification of sound by transistor, the piezoelectric ceramic piece that promotes to have sound-aid cavity sends chimes of doom.The housing of alarm is by inside and outside two-layer the composition.The device that has lock body to be connected with bicycle under the shell body, there is fixed orifice the back.

The utility model is because the packet type switch that has adopted electronic switch to combine with mechanical switch.Make alarm have the password characteristics, anti-theft alarm result is reliable, reports to the police and easily opens difficulty.Lock body uses chain lock, and bicycle lock on fixture, can be triggered alarm and shoulders away bicycle, and the chain lock applied range.

In conjunction with the accompanying drawings this reality is done novel being described in detail:

Accompanying drawing 1 is the circuit theory diagrams of bicycle anti-theft alarm device

Accompanying drawing 2 is the structural representation of bicycle anti-theft alarm device.

In the enforcement, the bicycle alarm is by switch ^{［ 1 ］}, alarm triggering device ^{［ 2 ］}, articulatory system ^{［ 3 ］}, lock body ^{［ 4 ］}And housing ^{［ 5 ］}Form.The utility model switch uses a mechanical type by six (or eight) to make code switch and electronic switch makes up the packet type switch that forms.Each of making code switch is relatively independent, can be used for controlling the break-make of electronic switch respectively, or be directly used in the control power supply and the triggering of reporting to the police, make code switch everybody can be respectively applied for one of three kinds of control modes or its array configuration, make this switch have the password characteristics, when the air exercise code switch is selected different positions and different figure place for use, can obtain corresponding password combination, alarm triggering device ^{［ 2 ］}Be divided into two parts.A part is being made code switch, and that makes code switch connects short-circuit alarming or breaking alarming respectively, when a few are stirred by mistake, will trigger warning; Another part is two strands that pass lock body, chain, and wherein one is path (breaking alarming), and another strand will cause warning when the burglar attempts to stir to beat when code switch turn-offs alarm or picking lock originally as open circuit (short-circuit alarming).Articulatory system ^{［ 3 ］}Source of sound uses 9561 musical films, by sound collecting end pronunciation is selected for use and to be police whistle sound, adopt the multistage amplification of transistor, step-up transformer boosts, the piezoelectric ceramic piece that promotion has sound-aid cavity sends police whistle sound, the concrete course of work is: when the musical film energized, the sound signal of police whistle sound is delivered to the input end of transistor multistage amplifier, amplify through two-stage, the signal amplitude value is sent into the step-up transformer primary side near supply voltage, anti-through boosting of step-up transformer with the impedance change, deliver to the sheet that boosts, promote the piezoelectric ceramic piece sounding, and the effect of sound-aid cavity is acoustic energy is concentrated.Lock body of the present utility model ^{［ 4 ］}Adopt chain lock, tapered end is fixed on housing ^{［ 5 ］}In, dead bolt inserts from housing one side, and housing adopts double-decker, and internal layer is a plastic casing, and circuit part, pronunciation part, electronic switch partly are sealed in wherein.The outer steel plate that adopts, board plug type is installed, and fixes with screw and tapered end.The device that is connected with bicycle is arranged below the shell body, and there is fixing screw hole screw hole at the back side.

Claims

1, a kind of bicycle anti-theft alarm device is made up of switch, alarm triggering device, articulatory system, lock body and housing, it is characterized in that:

A. establish an electronic switch and make code switch with mechanical type respectively each be connected the typing cipher control;

B. in articulatory system, connect multistage multiplying arrangement of transistor and step-up transformer;

C. alarm triggering device is made up of short circuit and tripper, and beats code switch, chain lock and articulatory system and is connected;

D. housing is by inside and outside two-layer the composition.

2, according to the described bicycle anti-theft alarm device of claim 1, each that it is characterized in that beating code switch is relatively independent, is connected with switch, power supply and alarm triggering device respectively.

3, according to the described bicycle anti-theft alarm device of claim 1, it is characterized in that the lock body chain lock.

4,, it is characterized in that report to the police triggering circuit beating being equipped with on code switch and the chain lock according to claim 2 and 3 described bicycle anti-theft alarm devices.