JPH0426601Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an automobile theft prevention device that can more reliably prevent theft of automobiles.

(Prior Art) Since automobiles are often parked outdoors when they are not in use, there is a risk that the automobile itself or items left in the cabin may be stolen.

Therefore, it has been proposed to prevent the theft by interlocking with the operation of the starting operation system of the automobile (for example, Japanese Utility Model Application No. 50-48335).

(Problem that the invention aims to solve) Incidentally, it is thought that theft is often carried out by a person attempting to steal a vehicle by forcing open a locked door and entering the vehicle compartment. The conventional configuration described above cannot prevent a person who attempts to steal a vehicle from opening the door or stealing something left in the vehicle compartment.

(Purpose of the invention) This invention was made with attention to the above-mentioned circumstances, and if there is an attempt to steal a car, this attempt should be stopped as early as possible to more reliably prevent theft. However, in this case, the purpose is to more reliably detect the act of attempting to steal.

(Structure of the device) The feature of this device to achieve the above object is that a pressure sensor connected to a warning means is interposed between the lock and the outer panel of the door, and this pressure sensor is connected to the outer surface of the lock. The pressure sensor is provided so as to almost completely surround the pressure sensor.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings.

In FIG. 2, reference numeral 1 denotes an automobile, and a door opening 3 is formed on the side surface of the vehicle body 2. A door 5 that can open and close this door opening 3 is provided,
The door 5 is pivotally supported at the front edge of the door opening 3 via a hinge 6 so as to be rotatable in the vehicle width direction.

Further, a locking mechanism 7 is provided which allows the door 5 to be locked when the door opening 3 is closed. Although not shown, this lock mechanism 7 is composed of a striker provided on the vehicle body side and a latch provided at the pivot end of the door 5 and engaged with the striker.

Further, key means 8 for locking or unlocking the lock mechanism 7 is provided.

1 and 3, the key means 8 includes a key 10, a lock 11 which is operatively connected to the lock mechanism 7 and locks or unlocks the lock mechanism 7 when operated by the key 10, and a key body 11. and a retainer 12 that supports the outer panel 5a of the door 5.

The lock 11 has a disk-shaped head 14 and this head 1.
The main body case 15 is provided to protrude from the door 5, and the protruding end side of the main body case 15 is fitted into a through hole 16 formed in the outer plate 5a of the door 5.

Furthermore, notches 19 are formed on the outer peripheral surface of the main body case 15 at symmetrical positions in the radial direction, and a portion of the retainer 12 is fitted into each of the notches 19 . This retainer 12 is made of an elastic member, and urges the lock 11 toward the inside of the vehicle.

A key hole 20 is formed in the end surface of the head 14, and the key 10 can be inserted into and removed from the key hole 20. Further, a key shaft 21 is protruded from the main body case 15, and although not shown, the key shaft 21 is operatively connected to the latch of the lock mechanism 7. Then, the key 1 for the key hole 20 is
By inserting and rotating the key shaft 21
rotates, and in conjunction with this key shaft 21, the lock mechanism 7 is locked or unlocked.

The head 14 is exposed to the outside of the vehicle body 2, and a pressure sensor 22 is interposed between the head 14 and the opening edge of the through hole 16. This pressure sensor 22 is formed in a ring shape so as to almost entirely surround the outer periphery of the lock 11, and is sandwiched between the head 14 and the opening edge of the through hole 16.

The pressure sensor 22 may be, for example, a piezoelectric ceramic that generates an electromotive force when pressurized and strained, a flexible switch that changes resistance when compressed by mixing metal powder into rubber, or other capacitance-variable touch switches. etc.

In FIG. 4, the pressure sensor 22 is connected in series to an amplifier circuit 24, a comparator circuit 25 and a warning means 26.

For example, if a foreign object such as a screwdriver is forcibly inserted into the key hole 20, or if this is pried, the pressure sensor 22 is pressurized and a signal is output. In this case, the output signal is amplified by the amplifier circuit 24, and if the output of the amplifier circuit 24 is larger than the set value in the comparison circuit 25, a signal is outputted from the comparison circuit 25 to the warning means 26. As a result, the warning means 26 is activated and a warning sound is emitted.

(Effects of the invention) According to this invention, a pressure sensor connected to a warning means is interposed between the lock and the outer panel of the door, so that a person attempting to steal a car can force the lock by a driver or the like. When an attempt is made to operate the key, the pressure sensor is pressed through the lock with a force greater than the pressure applied during normal key operation, and this is detected and a warning is issued by the warning means. Therefore, the attempted theft can be stopped at an early stage before it reaches the passenger compartment.

Furthermore, since the pressure sensor surrounds almost the entire outer periphery of the lock, the pressure sensor can reliably detect pressure applied to the lock in any direction. For example, if you try to insert a screwdriver or the like with a larger cross-sectional shape than the keyhole into the keyhole, or try to break the lock by inserting a wire thinner than the keyhole into the keyhole, However, the above operations are reliably detected as pressure is applied to the lock.
Acts of attempted theft are more reliably prevented.

[Brief explanation of the drawing]

The figures show an embodiment of this invention, in which Figure 1 is a side view of the key means, Figure 2 is an overall side view of the automobile, and Figure 3 is a side view of the key means.
The figure is a partially enlarged view of FIG. 2, and FIG. 4 is an electrical block diagram. DESCRIPTION OF SYMBOLS 1...Automobile, 5...Door, 7...Lock mechanism, 8...Key means, 11...Key body, 22...
...Pressure sensor, 26...warning means.

Claims (1)

[Scope of utility model registration request] A door device for an automobile, comprising a lock mechanism capable of locking a vehicle door in a closed state, and a lock attached to the outer panel of the door, which is interlocked with the lock mechanism and locks or unlocks the lock mechanism by key operation. A pressure sensor connected to a warning means is interposed between the lock and the outer panel of the door, and the pressure sensor is provided so as to almost entirely surround the outer periphery of the lock. Automobile anti-theft device.