CN2192527Y - Anti-theft siren for bicycle - Google Patents

Abstract

The utility model relates to an anti-theft alarm for a bicycle. Except that the traditional vibration switch is adopted to alarm, two paths are additionally arranged to be connected with the anti-theft alarm for a bicycle, one path is that a power supply lock switch K< 1 > is directly connected with the anti-theft alarm for a bicycle, the other path is that the power supply lock switch K< 1 > is connected with a first warning circuit and a second switch circuit II, and then, the anti-theft alarm for a bicycle is connected. The warning circuit is composed of front wheel warning and rear wheel warning. The front wheel warning and the rear wheel warning are respectively composed of a conducting wire, a plug, and a socket, and are respectively with one self-defence switch. When a bicycle is parked in normal times, a power supply switch is needed to be closed, a foot brace is opened, and the bicycle is well placed by inclining a definite angle. The quiescent current of the anti-theft alarm for a bicycle is minimum.

Description

Anti-theft siren for bicycle

The utility model belongs to the vehicle anti-theft warning device.

Prior art design-calculated bicycle annunciator, the trigger circuit triggers alarm equipment alarm that general using mercury formula vibroswitch constitutes, this annunciator has directivity, and the sensitivity of a certain direction is very low; Another kind is the spring loaded vibroswitch, and this switch shortcoming is easily to get rusty and elastic fatigue, uses can to produce misoperation after a period of time or be failure to actuate.

The utility model purpose provide a kind of warning dependable performance, highly sensitive, can not flase alarm, firm, antirust, easy to install, the compact conformation of annunciator, power consumption is minimum can battery-powered bicycle anti-theft alarm device.

The technical scheme of Cai Yonging for achieving the above object: adopt three tunnel to report to the police.One the tunnel with routine techniques roughly the same, adopt to trigger and report to the police by mercury formula vibroswitch; Architectural feature shows two tunnel warning schemes in addition.1) power supply lock-switch direct connection annunciator; 2) power supply lock-switch warning in parallel circuit and switch circuit, warning circuit, switch circuit and annunciator are connected in series.

The drawing explanation:

Fig. 1 is the scheme functional block diagram;

Fig. 2 is the scheme circuit diagram.

Further specify technical scheme with reference to accompanying drawing:

As shown in Figure 1, power supply V _CcWith power supply lock-switch K ₁Join K ₁Direct connection annunciator III; Power supply lock-switch K ₁Join with warning circuit I and switch circuit II again, and warning circuit, switch circuit and annunciator three are connected in series.

Fig. 2 represents to reach between each electronics package of switch circuit II the annexation of interlock circuit.Resistance R ₁With capacitor C ₁Be connected in series C ₁Other end ground connection, R ₁With C ₁Contact S and aerotron T ₁Connect (warning circuit I 1 termination S point, other end ground connection); T ₁Again respectively with power supply lock-switch K ₁And diode D ₁With resistance R ₂Between contact N connect R ₂Other end ground connection, and the diode other end and one-way SCR T ₂Connect T ₂Again respectively with K ₁With mercury formula vibroswitch K ₂With resistance R ₃Contact M connect vibroswitch K ₂Again respectively with power supply lock-switch K ₁And the annunciator III connects resistance R ₃Other end ground connection.

Working process of the present utility model:

When bicycle is on the alert, answer power turn-on lock-switch K ₁(energized V _Cc), make entire circuit be the state of alert.This moment aerotron T ₁, diode D ₁And one-way SCR T ₂All end, annunciator III and power supply are obstructed, and the alarm free signal output is because of T ₁, T ₂, the equal no current of annunciator passes through, so consumed power not.Quiescent current only passes through resistance R ₁And the warning circuit, because R ₁Resistance is very big, and the internal resistance of warning circuit is very little, so quiescent current is only limit at microampere order (10 ^-6A), so not power consumption substantially.When the car thief opens a trailing wheel warning or when front-wheel warning or the self-defence switch trigger triode T of warning in the circuit ₁Make its saturation conduction, make resistance R ₂Current potential raises, by diode D ₁Trigger one-way SCR T ₂Conducting, resistance R ₃Current potential rises to 3 volts, makes the annunciator action, sends the alerting signal greater than 95 decibels.Even after this warning circuit is reclosed one-way SCR T ₂Still conducting, signal does not stop, up to power supply lock-switch K ₁Till the disconnection.

Capacitor C ₁For preventing misoperation electric capacity,, can pass through C when there is burst radio signal (as thundering etc.) in the external world ₁Ground connection (power supply ground) makes switch circuit interference-free.

Vibroswitch is a mercury switch, and it is vertical parallel with ground with vehicle frame that mercury switch is installed, and is glued on the car body.Open when car body slightly become being tilted park when the car heel brace, mercury switch disconnects, and circuit is obstructed.And when the car thief kicked open heel brace and sets upright car body, mercury switch was conducting, and power line voltage is directly received the report for police service on the device, sent alerting signal.And when car returned to stand, mercury switch disconnected again, and alerting signal promptly stops.

Annunciator is the buzzer of a high loudness, or adopts integrated circuit 9561 and loudspeaker.As long as promptly send the chimes of doom greater than 95 decibels behind the connection dog days power line voltage, personnel note preventing auto theft to be enough to submit to the car owner to reach on every side.

The utlity model has the function of multiple anti-theft bicycle, its advantage is remarkable, shows following several respects:

1. when the burglar kicks open car support and sets upright vehicle frame or back of the body car, make mercoid switch (vibroswitch) action, send chimes of doom;

2. when the burglar prizes lock, must draw back the edge connector of trailing wheel warning, chimes of doom is sent in the switch circuit conducting;

3. work as the burglar and mention trailing wheel, pushing away front-wheel and walking, must draw back the edge connector of front-wheel warning, chimes of doom is sent in the switch circuit conducting;

4. trigger micro-switch in the self-defence circuit when the burglar prizes annunciator, promptly send chimes of doom;

5. guard against circuit when the burglar draws (cutting) to break, trigger the self-defence circuit, send chimes of doom;

6. when the car owner uses car, only need disconnecting power switch K ₁, just can flase alarm;

7. when the car owner parks without car at ordinary times, put heel brace (angle of tilting of car body) well, connect the edge connector of front and rear wheel warning circuit, power turn-on lock-switch K ₁, this annunciator promptly is on the alert, because of quiescent current minimum, not power consumption substantially at ordinary times;

8. this annunciator is suitable for various model bicycles, suitably after the repacking also applicable to the anti-theft alarm of motor bike, mini-motorcycle;

9. highly sensitive, profile is firm, elegant in appearance, easy to install, with low cost.

Claims (5)

1, bicycle anti-theft alarm device includes and annunciator bonded assembly mercury formula vibroswitch, it is characterized in that having in addition two circuit to be connected with annunciator respectively, and its circuit connecting relation is as follows:

(1) power supply lock-switch K ₁Direct connection annunciator III;

(2) power supply lock-switch K ₁Warning circuit I in parallel and switch circuit II, and warning circuit I, switch circuit II and annunciator III are connected in series.

2, bicycle anti-theft alarm device according to claim 1 is characterized in that power supply adopts 4.5 volts of vdcs, power supply lock-switch K ₁Adopt the SD-108 type.

3, bicycle anti-theft alarm device according to claim 1, it is characterized in that guarding against the circuit I is made up of front-wheel warning, trailing wheel warning and self-defence switch, front-wheel warning, trailing wheel warning are made up of a lead and banana type plug, socket respectively, plug is inserted on the socket by front-wheel during the front-wheel warning, plug is inserted on the socket on the lock side by trailing wheel during the trailing wheel warning, and the self-defence switch is a common small-sized micro-switch.

4, bicycle anti-theft alarm device according to claim 1 is characterized in that the annexation of switch circuit II electronic devices and components is as follows: resistance R ₁With capacitor C ₁Be connected in series C ₁Other end ground connection, R ₁With C ₁Between contact S and aerotron T ₁Connect (warning circuit 1 termination S point, other end ground connection), T ₁Again respectively with power supply lock-switch K ₁With diode D ₁With resistance R ₂Between contact N connect R ₂Other end ground connection, the diode other end and one-way SCR T ₂Connect T ₂Again respectively with power supply lock-switch K ₁M is connected with contact, contact M again respectively with resistance R ₃With vibroswitch K ₂Connect R ₃Other end ground connection, vibroswitch one termination power lock-switch K ₁, other end device III taking alarm.

5, bicycle anti-theft alarm device according to claim 1 is characterized in that annunciator adopts high loudness buzzer or with integrated circuit 9561 and loudspeaker.

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