JPH07277243A - Alarm to protect bike against tampering and theft - Google Patents

Abstract

PURPOSE:To immediately emit an alarm to warn of tampering or theft. CONSTITUTION:An alarm comprises a key-shaped metal for insertion into a keyhole 4, a magnetic sensor 3, and an alarm actuator circuit, the magnetic sensor being mounted on the side of a key main body and at least part of the key-shaped metal being made of a magnet so that if someone pulls out the key-shaped metal that is inserted into the keyhole when the bike is not in use, the alarm is actuated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tampering or burglarproof alarm device which utilizes an engine starting keyhole provided in a motorcycle.

[0002]

2. Description of the Related Art Although an alarm device is known that operates an alarm device by detecting sound, vibration, inclination, etc., it has many problems such as malfunction and difficult mounting.

[0003]

SUMMARY OF THE INVENTION The present invention focuses on the fact that many thefts damage the engine starting key part, and promptly informs the surroundings by an alarm device before the key part is damaged. A prank or anti-theft alarm device is provided.

[0004]

A tamperproof alarm device for a motorcycle according to the present invention comprises a key-like metal fitting which can be inserted into a keyhole for starting an engine of a motorcycle, and an alarm device provided on the motorcycle body side. At least a part of the key-like metal member is made of a magnet, and the alarm device has a magnetic sensor and an alarm activating circuit provided near the keyhole.

[0005]

[Function] When the user leaves the motorcycle, the key-like metal fitting is inserted into the keyhole instead of the engine starting key. If someone pulls out the key-shaped metal fitting from the keyhole, the magnetic sensor and the key-shaped metal fitting are separated from each other, so that the alarm actuation circuit operates and the alarm device operates, and an alarm is issued to the surroundings.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

In the figure, reference numeral 1 indicates a key-like metal fitting, which has a tip portion that can be inserted into a key hole for starting an engine of a motorcycle.

The shape of this tip portion is for insertion only, and is different from the shape of the insertion portion of the engine starting key.

A part of the key-like metal fitting 1 is composed of a magnet 2.

Although the magnet 2 is attached to the main body of the key-shaped metal fitting 1 by screws in FIG. 1, it may be integrally formed with the main body of the key-shaped metal fitting.

FIG. 2 is a schematic view showing a part of the motorcycle side, in which a magnetic sensor 3 is provided at a portion close to the key body 4 for starting the engine.
Is provided.

A keyhole 4 is provided in the center of the engine starting key body 4.
When the key-shaped metal fitting 1 is inserted instead of the engine starting key as shown in FIG. 3, the magnet 2 is positioned so as to be close to the magnetic sensor 3 in a non-contact manner.

An alarm activation circuit is shown in FIG.
The terminals 5 and 7 are connected to the + and-sides of the motorcycle battery, respectively, and are configured to operate the buzzer 9 via the switch 12.

The switch 12 is switched by a relay 10, and the relay 10 is electrically connected to a cylinder where electricity is supplied when the engine start key of the motorcycle is on. As a result, when the engine starting key is on, the switch 1
2 is turned off, and the switch 12 is turned on when the engine starting key is off.

A switch 13 operated by the magnetic sensor 3 is interposed in the alarm device operating circuit, and timer circuits 8 and 8'are provided so that any one of them can be selected by the switch 11.

The operation of the circuit of this embodiment will be described. It does not operate as long as the engine start switch of the motorcycle is in the ON state. When the switch is turned off, the switch 12 is turned on, and the buzzer 9 is activated when the time determined by the timer circuits 8 and 8'has elapsed. However, when the magnet 2 is close to the magnetic sensor 3, that is, the keyhole 4
If the key fitting 1 is inserted in the switch 13
Turns off and the alarm circuit does not operate.

Next, a method of using the alarm device of the present invention will be described.

When leaving the motorcycle, the engine starting key is removed and the key-like metal fitting 1 is inserted. This process must be performed within the time (for example, 10 seconds) set by the timer setting circuit.

When the motorcycle is used, the key-like metal fitting 1 is removed, the key is inserted, and the engine start switch is turned on within the set time.

If a person pulls out the key-like fitting when the key-like fitting is inserted into the key hole of the motorcycle, an alarm device (buzzer) is activated after a set time.

To turn off the alarm device, a key may be inserted and the switch for starting ethidine may be turned on.

Since the present invention has the above-mentioned structure,
When someone tries to break the key body in an attempt to steal or misuse the motorcycle, the alarm activates reliably, preventing criminal activity, getting witnesses, and the owner of the motorcycle. It has an effect that it can be easily noticed when it is nearby.

[Brief description of drawings]

[Fig. 1] Schematic diagram of key-like metal fittings

FIG. 2 is a schematic diagram showing a relationship between a key body and a magnetic sensor.

FIG. 3 is a schematic view of a state in which an alarm device is set.

[Fig. 4] Alarm device operation circuit diagram

[Explanation of symbols]

1. ． Key fitting 2. ． magnet. 3. ． Magnetic sensor. 4. ． The key body. 4`. ． Keyhole 5. ． Wire to the motorcycle battery (+ side). 6. ． Wiring to the place where electricity enters when the main switch of the bike is ON. 7. ． Wire to the battery (-side) of the bike. 8. ． Timer circuit. 8 '. ． Timer circuit 9. ． buzzer. 10. ． relay. 11. ． Alarm operation time selection switch. 12. ． Relay internal switch 13. ． Magnetic sensor internal switch

Claims (1)

[Claims] 1. A key-shaped metal fitting which can be inserted into a key hole for starting an engine of a motorcycle, and an alarm provided on the motorcycle main body side, at least a part of the key-shaped metal fitting being composed of a magnet, and the alarm. A tamper-proof alarm device for a motorcycle, wherein the container has a magnetic sensor provided near the keyhole and an alarm activation circuit.