JPH04104792U - Anti-theft device for motorcycles - Google Patents

Abstract

(57) [Summary] [Purpose] To generate an alarm sound when the wire or the like is cut in a device for preventing theft of a motorcycle by connecting the tire and the vehicle body with a wire or the like. [Structure] When the conducting wire 1 made of wire etc. is cut,
The voltage of the main circuit _R1 changes, and in response to this voltage change, the switch 5 consisting of a MOS FET is turned on and the alarm sound generating means 6 is operated.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea connects the tires and the vehicle body using wires, etc. to prevent theft. The present invention relates to an anti-theft device.

0002

[Conventional technology]

Wire locks have long been known to prevent bicycle theft; - A lock connects the tire and the vehicle body with a wire to prevent the tire from rotating and prevent the bicycle from rotating. It was made so that it could not be driven.

0003

[Problem that the idea aims to solve]

In the conventional anti-theft device as described above, if the wire is cut, There was a problem that the theft function could not be fulfilled. The purpose of this invention is to generate an alarm sound when the wire is cut to prevent theft. To provide an anti-theft device for a two-wheeled vehicle that exhibits its functions.

0004

[Means to solve the problem]

This idea connects the tires and the vehicle body with wires to prevent theft. This is based on an anti-theft device for two-wheeled vehicles. While assuming the above device, this invention consists of a conductor made of wire etc. and a conductor such as a wire. a power supply that applies voltage to the wire, and a mains circuit whose voltage fluctuates when this conductor is disconnected. and an alarm circuit connected to the main circuit, and the alarm circuit includes: A switch that turns on in response to fluctuations in the voltage of the main circuit, and It is characterized in that it is provided with an alarm signal generating means that generates an alarm sound in accordance with the operation.

[0005]

[Effect]

This invention is configured as described above, so that the conducting wire made of wire etc. is not cut. As a result, the voltage in the main circuit increases. As this voltage rises, the alarm circuit switches off. Since the switch is turned on, the alarm signal generating means generates an alarm sound.

[0006]

[Effect of the idea]

According to the anti-theft device for motorcycles of this invention, conductors made of wires etc. are cut. Even if the device is stolen, an alarm will sound, alerting those around you of the theft. This helps prevent theft.

[0007]

【Example】

The main circuit R ₁ in the illustrated embodiment has a conducting wire 1 made of wire or the like as a main element. A resistor 2 and a capacitor 3 are connected in series to this main circuit _R1 , and a power source 4 is connected to the resistor 2. The main circuit R ₁ thus configured maintains a state in which the current is grounded unless the conductor 1 is disconnected. Then, when the conducting wire 1 is cut, the capacitor 3 is charged and its voltage fluctuates.

An alarm circuit R ₂ is connected to the main circuit R 1 as described above, and this alarm circuit _{R 2 includes} a switch 5 consisting of a MOS FET, and an alarm is generated by turning on the switch 5. It is connected to an alarm signal generating means 6 that generates a sound. The switch 5 is turned on in response to voltage fluctuations in the main circuit _R1 . Note that the reference numeral 7 in the figure is a protective Zener.

Next, the operation of this embodiment will be explained. A main circuit R1 is formed by connecting the tires of a two-wheeled vehicle and the vehicle body using a conductive wire ₁ . When the conductor 1 is cut in this state, the capacitor 3 is charged and the voltage of the main circuit _R1 fluctuates. When the voltage of the main circuit _R1 fluctuates as described above, the switch 5 consisting of a MOS FET is turned on and the alarm signal generating means 6 is operated. The alarm signal generating means 6 may be a buzzer or may be one that generates a sound such as "thieves", for example.

0010 As described above, according to the anti-theft device of this embodiment, the tires of the motorcycle and the vehicle body are Even if the connecting conductor is cut, an alarm will sound, alerting others to theft. can be done. If the alarm sound spreads to the surrounding area, theft can be deterred.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an embodiment.

[Explanation of symbols]

R ₁ Main circuit 1 Conductor 4 Power supply 5 Switch 6 Alarm generating means

Claims (1)

[Scope of utility model registration request] Claim 1. An anti-theft device for a two-wheeled vehicle configured to prevent theft by connecting a tire and a vehicle body with a wire or the like, comprising a conductor made of the wire or the like, a power source that applies voltage to the conductor, and a power supply that applies a voltage to the conductor. The alarm circuit includes a main circuit whose voltage fluctuates when the conductor is cut, and an alarm circuit connected to this main circuit. 1. An anti-theft device for a two-wheeled vehicle, comprising: an alarm signal generating means for generating an alarm sound in response to an on operation of the anti-theft device for a two-wheeled vehicle.