JP2001199310A - Movement detecting device for tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent a theft of a vehicle or a tire. SOLUTION: This movement detecting device is provided with a box body 2 having a contact surface 5 contacting with a tire 10, a contact sensor 6 being arranged on the contact surface and detecting contact with the tire, projections 7 arranged around the contact sensor and inserted into a groove 10a of the tire and a movement sensor 9 being arranged inside of the box body and detecting a movement of the box body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire movement detecting device for preventing a vehicle or a tire from being stolen.

[0002]

2. Description of the Related Art Conventionally, in order to prevent theft of a vehicle or a tire, a sensor base is inserted between the tire of a parked automobile and the ground, and a piezoelectric vibration sensor is mounted on the upper surface of the sensor base to vibrate the tire. Is known and an alarm is issued (for example, Utility Model Registration No. 301238).
No. 2).

[0003]

However, in the above-mentioned conventional method, a thin plate is inserted between the tire and the piezoelectric vibration sensor, and the sensor base is removed while the piezoelectric vibration sensor is held down by the plate, and the vehicle is mounted on the vehicle. There is a problem that it becomes possible to move or remove the tire.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a tire movement detecting device capable of reliably preventing a vehicle or a tire from being stolen.

[0005]

In order to achieve the above object, a tire movement detecting device is provided on a box body 2 having a contact surface 5 for contacting a tire 10 and a box body 2 provided on the contact surface for contact with the tire. Sensor, a protrusion 7 provided around the contact sensor and inserted into the groove 10a of the tire, and a movement sensor 9 provided inside the box body and detecting movement of the box body. It is characterized by. The numbers added to the above configuration are for comparison with the drawings to facilitate understanding of the present invention,
This does not limit the configuration of the present invention at all.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows one embodiment of a tire movement detecting device according to the present invention. FIG. 1 (A) is a perspective view of the movement detecting device, FIG. 1 (B) is a side view thereof, and FIG. It is a side view showing the state set to the tire.

As shown in FIGS. 1 (A) and 1 (B), a movement detecting device 1 has a box main body 2 having a wheel stopper shape that is inconspicuous when viewed from the outside, that is, a substantially triangular shape when viewed from the side. 3, a non-slip portion 4 is formed, and a contact sensor 6 comprising a switch or a piezoelectric sensor for detecting contact with the tire is provided on a contact surface 5 which is in contact with the tire. A projection 7 is provided. Further, a movement sensor 9 for detecting the movement of the box body 2 is provided inside the box body 2.

The movement sensor 9 is a sensor that detects at least vibration. Therefore, it is natural that a vibration sensor can be used as the movement sensor 9, but a sensor capable of detecting vibration and inclination as disclosed in JP-A-9-161633 may be used. The description of the vibration sensor is omitted because it is well known.

The movement detecting device 1 having the above-described configuration is similar to the one shown in FIG.
As shown in (C), the contact sensor 6 is brought into contact with the tire 10, and at this time, the projection 7 is installed so as to be inserted into the groove 10 a of the tire 10. Therefore, even if an attempt is made to insert a thin plate between the tire 10 and the contact sensor 6, the movement of the plate is prevented by the projection 7, and the pressing of the contact sensor 6 can be prevented.

FIG. 2 shows an electric circuit of the contact sensor 6 and the movement sensor 9 of FIG. The contact sensor 6 is urged in the opening direction by the contact piece 6a by a spring 6b. When the contact sensor 6 is pressed against the tire, the contact piece 6a is closed. Flows to the CPU 12, and the CPU 12 outputs an alarm signal. When the movement sensor 9 detects vibration or tilt of the box body 2, the CPU 12 similarly outputs an alarm signal. The alarm signal is transmitted to the receiver wirelessly or by wire, and an alarm is issued by a buzzer, sound, or the like. Further, an alarm device that emits a threatening sound may be built in the box body 2.

According to the movement detecting device having the above configuration,
When the tire 10 and the movement detection device 1 are separated, the movement of the tire can be detected by the contact sensor 6, and when the tire 10 and the movement detection device 1 are tied with a tape or the like and the tire is removed, The movement of the tire can be detected by the movement sensor 9.

FIG. 3 is a side view showing another embodiment of the present invention, in which the device is set on a tire. The same components as those in the embodiment of FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In the present embodiment, the contact surface 5 of the box body 2 which is in contact with the tire is an arc-shaped curved surface having the same shape as the tire, and the movement detecting device 1 is used for the tire 1.
This is an example in which it can be installed on the upper surface of a disc 0 so as to be inconspicuous from the outside. In the embodiment shown in FIG.
May be an arcuate curved surface.

[0013]

As is clear from the above description, according to the present invention, it is possible to reliably prevent the vehicle or tire from being stolen by combining a movement sensor with a contact sensor having a projection.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a tire movement detecting device according to the present invention, FIG. 1 (A) is a perspective view of the movement detecting device, and FIG. 1 (B).
Is a side view, and FIG. 1C is a side view showing a state where the device is set on a tire.

FIG. 2 is a diagram showing an electric circuit of the contact sensor and the movement sensor of FIG.

FIG. 3 is a side view showing another embodiment of the present invention and showing a state where the device is set on a tire.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Movement detection apparatus 2 ... Box body 5 ... Contact surface 6 ... Contact sensor 7 ... Projection 9 ... Movement sensor 10 ... Tire 10a ... Groove

Claims (2)

[Claims] 1. A box body having a contact surface that comes into contact with a tire, a contact sensor provided on the contact surface and detecting contact with the tire, and provided around the contact sensor and inserted into a groove of the tire. A tire movement detection device comprising: a projection; and a movement sensor provided inside the box body and detecting movement of the box body. 2. The tire movement detecting device according to claim 1, wherein said contact surface is an arc-shaped curved surface.