JPS6140577B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for more effectively preventing theft of a motor vehicle equipped with a steering lock device.

It has a cylinder lock and an ignition switch, and by turning the key inserted into the cylinder lock, the ignition switch can be set to the required circuit switching device, and when the key is turned to the lock position, When the engine stops and the key is pulled out of the cylinder lock at that point, the lock bar protrudes and engages with the steering shaft, preventing rotation of the steering shaft and making it impossible to steer the vehicle. It is widely used as an anti-theft device for cars, but in recent years, the steering lock device or its parts have been destroyed or removed to unlock the steering shaft, and the ignition switch has also been removed and operated by disconnecting the ignition switch cord and causing a short circuit. However, thefts are occurring due to abnormal operations such as starting the engine, and simply installing a steering lock device as in the past has become less effective in preventing theft. Anti-theft devices have come to be required.

The present invention has been made in view of the above points, and when the steering lock device attached to the automobile or a part thereof is destroyed or removed, the power to the ignition device is cut off and the ignition switch is removed to operate the device. Or, even if you take measures such as disconnecting the ignition switch cord and shorting it,
making it impossible to start the engine,
The purpose is to more reliably prevent theft compared to conventional cars with only a steering lock device.

Furthermore, it is an object of the present invention to more effectively prevent theft by activating an alarm device at the same time as cutting off the power to the ignition device.

Examples of the present invention will be described below.
The figure shows a cylinder lock and an ignition switch. Turning the key inserted into the cylinder lock to the lock position stops the engine, and when the key is pulled out of the cylinder lock, the lock bar protrudes and connects the steering shaft, etc. A steering lock device that is constructed so as to be engaged with the vehicle and impede the normal operation of the vehicle, and that is constructed so as to close when a steering lock device or a portion of the steering lock device attached to the vehicle is destroyed or removed. and a switch element arranged at a key point of its attachment partner...1.
Ignition system...2, Ignition switch...3,
Since the power supply...4 and the fuse...5 are connected as shown in the diagram, if the steering lock device or its parts are destroyed or removed in order to drive the vehicle without relying on normal means, key points may be damaged. One or more of the switch elements 1 disposed in the switch element 1 are closed, and the load side terminal 6 of the fuse 5 is short-circuited to ground, so the fuse 5 instantly melts and the ignition device 2 For example, even if the steering shaft is unlocked and the car can be steered, the engine will no longer be able to drive the car, making it impossible for cars equipped with only a steering lock device. It is possible to prevent theft more reliably than with .

Although the switch element 1 is not specifically shown in the drawings, for example, conductive wires forming a current-carrying circuit are placed at appropriate positions on the steering lock device and key points on the other side, and the steering lock device is removed. Alternatively, the structure may be such that the conductive wire is cut due to breakage, thereby cutting off the current-carrying circuit, and this is detected to turn on the transistor.

Next, in Fig. 2, the arrangement of the fuse 5 is changed from Fig. 1, and the switch element 1 is closed when the ignition circuit is closed, or the ignition is turned on after the switch element 1 is closed. When the ignition circuit was closed by operating switch 3 or by disconnecting the ignition switch cord and shorting it, fuse 5 was blown and the engine could not be started.
The same effect as the device shown in the figure can be obtained.

Next, Figure 3 shows both terminals 6 of the fuse 5 in Figure 1,
A warning device 8 such as a horn, a warning light, or both is connected between 7 and 7, and as explained in Fig. 1, the warning device 8 is activated at the same time as the fuse 5 blows, so that the vehicle cannot be driven by the engine. Not only does this prevent the vehicle from being stolen, but the alarm device 8 notifies people around the vehicle that the vehicle is about to be stolen, so it is possible to prevent theft more effectively than the device shown in FIG.

Note that it is also possible to additionally connect an alarm device to the device shown in FIG. 2, and in this case, it is natural that the same effect as that of the device shown in FIG. 3 will be obtained.

As explained above, according to the present invention, even if the steering shaft is unlocked and the vehicle can be steered, the engine will not be able to drive the vehicle, compared to a vehicle equipped with only a steering lock device. , theft can be more reliably prevented.

In addition, in the case of the fuses described in Japanese Utility Model Publication No. 40-284, in which the fuses blow out when each door, bonnet, trunk, etc. are opened, measures are taken to prevent the fuses from blowing out during normal use. (changeover switch, dial, etc.) is required, and its operation (operation of changeover switch and dial)
If you make a mistake, if you try to drive with the door open, the fuse may blow and you will not be able to drive, or even if the door is opened illegally, it may not work.However, in the present invention, the steering Switch elements that close when the lock device is destroyed or removed are placed at key points on the steering lock device and its attachment partner, so there is no need to install a changeover switch or dial, so there are few parts and it is simple. In addition, the fuse cannot be blown by erroneous operation, but the fuse can be reliably blown if the steering lock device is destroyed or removed. Therefore, in addition to the above-mentioned effects, there is no need for any operation or adjustment after installation.

There is no possibility of erroneous operation or malfunction.

This does not cause any inconvenience to regular drivers.

Anyone who destroys or removes the equipment can be reliably warned.

There are effects such as

[Brief explanation of the drawing]

1 to 3 are connection diagrams showing embodiments of the present invention. 1... Switch element, 2... Ignition device, 3...
Ignition switch, 4...power supply, 5...fuse, 8...alarm device.

Claims (1)

[Claims] 1. The engine has a cylinder lock and an ignition switch, and by turning a key inserted into the cylinder lock to the lock position, the engine is stopped, and by removing the key, the lock bar protrudes and connects to the steering shaft. A steering lock device that is manufactured and installed in a vehicle so as to interfere with the normal operation of the vehicle, and a steering lock device that is installed at key points of the steering lock device and its attachment partner, and that the steering lock device is destroyed or removed. A vehicle theft vehicle comprising: a switch element that closes when the vehicle is turned off; and a fuse connected between a power source and an ignition device; one end of the switch element is grounded and the other end is connected between the fuse and the ignition device. Prevention device. 2. The anti-theft device for an automobile according to claim 1, characterized in that an alarm device is connected between both terminals of a fuse placed between the ignition device and the power source.