JPH07112811B2 - Vehicle anti-theft device - Google Patents

Description

The present invention relates to a vehicle antitheft device, and more particularly to a duplicate key,
The present invention relates to a vehicle antitheft device that prevents a vehicle from being stolen by starting an engine by an illegal means such as a direct connection of an electric wire.

"Prior Art" This type of device is an embodiment disclosed in, for example, JP-A-64-5621. This embodiment is basically a key switch unit having a key switch provided in a steering column on the vehicle side, a control device for controlling the engine start, and a key device for inserting the key switch to start the engine. Consists of.

However, this example has the following drawbacks.

The key device and the control device each have a complicated structure, such as a built-in transmitter having a CPU that stores a unique code set for each vehicle.

The key device has a CPU inside, a light emitting element, a plurality of contacts, and the like, and a complicated combination of electronic elements, so that the probability of failure is high.

However, if the key device itself fails, the key operation cannot start the engine at all.

“Problems to be Solved by the Invention” In view of the above-mentioned conventional drawbacks, the present invention has a small number of components as a whole, and also changes the number or arrangement of the magnet pin tumblers incorporated in the key cylinder lock. , Can easily cause the key difference of the key itself,
In addition, it is possible to eliminate the inconvenience that the engine cannot be started due to a failure of the key itself, and it is not necessary to take various steps before starting the engine.
In addition, there is a need for a vehicle antitheft device that can be easily installed, has excellent durability, and is inexpensive.

"Means for Solving Problems" An anti-theft device for a vehicle according to the present invention includes an outer cylinder member 2 having a plurality of through holes (3, 4) in a radial direction and a rotatable member inside the outer cylinder member. A key cylinder lock 1 for a vehicle, which comprises an inner cylinder member 5 which is received and has a plurality of grooves 6 in a portion corresponding to the through hole, and a plurality of key cylinder locks which are inserted into the key holes 8 of the key cylinder lock and are provided in the key body 7a. The magnet key 7 in which individual magnets are embedded, and the magnet key 7 provided in the through hole so as to be opened and closed through movement of the magnet pin tumbler housed in the through hole and the groove by inserting and removing the magnet key. Equipped with magnetic sensitive switch (11A, 11B),
Further, it is installed in an electric circuit between these magnetically sensitive switches and the control device 14 of the engine, and is equipped with an on-vehicle battery.
An input signal discriminating means 12 that uses the power supply signal supplied from 20 as information, and cuts the output signal to the supply element indispensable for the operation of the vehicle engine in the case other than the regular magnet key 7.
It is characterized by having.

Thus, a regular magnet key has a plurality of magnets embedded in the key body corresponding to the number or arrangement of magnet pin tumblers incorporated in the key cylinder lock. As the switch member, a magnetic sensitive switch for detecting the approach of a plurality of magnet movable obstacles is used.

Further, the supply element indispensable to the operation of the engine means a device or a member that causes the engine to not operate normally if any one of the ignition device, the fuel injection device, the fuel pump, the starter motor, etc. of the engine is missing.

[Examples] Examples of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a schematic view showing an embodiment of the present invention.

In the figure, reference numeral 1 is a key cylinder lock forming a part of a key switch 1A for an ignition coil or a switch provided on a steering wheel column of an automobile.
This key cylinder lock 1 is, for example, shown in FIGS.
It is configured as shown in the figure.

That is, 2 is an outer cylinder member having a predetermined length. The outer cylinder member 2 has an outer hole 3 and an inner hole 4 which communicate with each other in a radial direction from an appropriate portion of an outer peripheral portion and intersect each other. It is provided in. In this embodiment, two through-holes including the outer hole 3 and the inner hole 4 are formed at a required interval.

Reference numeral 5 denotes an inner cylinder member that is rotatably received in the outer cylinder member 2 within a predetermined angle range. The inner cylinder member 5 has an appropriate size in the outer peripheral portion corresponding to the through hole. Groove 6
Is formed, and a key hole 8 corresponding to the key body 7a of the magnet-key 7 shown in FIG. 4 is formed at the center thereof.

Reference numeral 9 denotes a movable obstacle housed in both the inner hole 4 of the outer cylinder member 2 and the groove 6 of the inner cylinder member 5. In this embodiment, a plurality of magnet pin tumblers 9a and 9b are used. This movable obstacle 9 is urged toward the groove 6 of the inner cylinder member when locking or before inserting the magnet key 7 by the spring member 10 having a comparatively weak spring force installed in the inner hole 4 of the outer cylinder member. Has been done. The magnet key 7 is composed of a key body 7a to be inserted into the key hole and a grip portion 7b connected to the key body 7a. As shown in FIG. 4, a plurality of magnets g are provided on the upper side of the key body 7a.
1 and g2 are buried with a required space. The polarities of the plurality of magnets g1 and g2 can be arbitrarily combined.

Reference numeral 11 denotes a switch member which is provided on the key cylinder lock 1 of the key switch 1A for the ignition switch and which is opened / closed by inserting / removing the magnet key 7 into / from the key hole 8. In this embodiment, as shown in FIG. When the movable obstacle 9 is jumped up from the groove 6 of the inner cylinder member by the insertion of 7 against the spring force of the spring member 10 and comes close to the movable obstacle 9, a magnetic sensitive switch is provided which detects it and is in a closed state. . As the magnetic sensitive switch 11, for example, a switch member 11A using a fixed contact piece 11a as a fixed contact and a movable contact piece 11b as a movable contact in FIG. 6 and a magnetic sensitive reed switch shown in FIG. 11B is used.

Therefore, in this embodiment, the switch member 11 using the magnetically sensitive switch is properly incorporated into the plurality of outer holes 3 of the outer cylinder member 2 as shown in FIGS. , 11 are connected in series and are protected by a cover body (not shown).

Reference numeral 12 is a power source via the switch member 11. In this embodiment, an electric power supply signal supplied from an in-vehicle battery 20 described later is used as information, and an output signal to a supply element indispensable to the operation of the engine of the vehicle in the case other than the regular magnet key 7. It is an input signal discriminating means for cutting off. As the input signal discriminating means 12, for example, an AND circuit can be used.

Therefore, in this embodiment, as shown in FIG.
Is interposed in the electric circuit between the switch member 11 of the key cylinder lock 1 and the control device 14 having the main CPU 13 for controlling the drive of the engine, and one input terminal of the AND circuit 12 is connected to the switch member 11 side. , The other input terminal is connected to the terminal side of the ignition coil or the ignition switch, and the output terminal of the AND circuit 12 is connected to the main C
It is connected to the input terminal of PU13.

Next, 15 is a fuel injection device, 16 is an engine ignition device, 17 is each essential element such as a condenser, and these are respectively connected to the main CPU 13 of the control device, and unless the relevant element is supplied to the engine, the operation of the engine is performed. It does not let you. Further, 18 is an essential element such as a fuel injection pump which is connected between the AND circuit and the control device 14 of the engine, especially in the case of a diesel engine, and the engine does not operate normally unless the element operates.

19 is connected to the key switch 1A via a magnet switch, and the on-vehicle battery 20 is used as a power source for the magnet key 7
It is a starter motor that is activated by the rotating operation of.

"Operation" In the above structure, as shown in FIGS. 2 and 3, before inserting the magnet key 7 into the key hole 8 of the key linder lock 1, a plurality of magnetic pin tumblers 9a as movable obstacles, 9b is pressed by the spring member 10 to be positioned in the groove 6 of the inner cylinder member, and the plurality of magnetic sensitive switches 11 as switch members are in the open state.

Then, as shown in FIGS. 4 and 5, first, the regular magnet key 7 is attached to the key hole 8 of the key cylinder lock 1.
, The magnetic forces of the magnets g1 and g2 embedded in the magnet key 7 act on the corresponding magnet pin tumblers 9a and 9b of the same poles, and the magnet pin tumblers.
9a and 9b jump up from the groove 6 of the inner cylinder member 5 against the spring force of the spring member 10 and approach each magnetic sensitive switch 11. Then, each magnetic sensitive switch 11 detects it,
Each of them is in a closed state, and a power feeding signal is sent from the vehicle-mounted battery 20 as a power source to the AND circuit 12 via the magnetic sensitive switches 11.

As long as the magnet key 7 is inserted into the key hole, this state continues even if the magnet key 7 is rotated because the magnet pin tumblers 9a and 9b are supported by the outer peripheral surface of the inner cylinder member 5.

Then, rotate the magnet key 7 to move the key switch 1A.
The output signal is ANDed by passing the "ON" position.
The AND circuit 12 enters the circuit 12 and determines that both signals are input at the same time and sends an output signal to the control device 14 of the engine. Then, the control device 4 causes the engine ignition device.
16. By controlling the drive of the fuel injection device 15 and the like, and further setting it to the "ST" position, the starter motor 19 rotates and the engine starts.

On the other hand, when a key other than the regular magnet key 7 is inserted into the key hole 8 of the key cylinder lock 1, the movable obstacle 9
Does not move at all, or all magnet pin tumblers 9a,
9b does not jump up, the magnetic sensitive switch 11 is not closed at all, or all the magnetic sensitive switches 11 are not closed, and therefore, the AND circuit from the power source 20 via the switch member 11 No power signal is sent to 12. Therefore, even if the magnet key 7 is rotated and the starter motor 19 is started, an output signal is not sent from the AND circuit to the control device 14, so that the engine does not start.

"Different Embodiments" Next, different embodiments of the present invention will be described. The same parts as those of the embodiment of the present invention are designated by the same and similar reference numerals, and duplicated description will be omitted.

In the embodiment shown in FIGS. 9 to 14, the main difference from the embodiment of the present invention is the key cylinder lock.

That is, 1B is a key switch for a ignition switch, and 1a is a key cylinder lock. The key cylinder lock 1a is basically an outer cylinder member 2a, an inner cylinder member 5a rotatably provided on the outer cylinder member 2a, and an inner cylinder member 2a which is internally provided by a spring member 10a. It is composed of a driver pin 26 that constantly presses the movable pin 25 installed in the tubular member 5a in the radial direction of the key hole 8a for the magnet key 7A, and serves as a switch member at an appropriate location of the thin portion of the outer tubular member 2a. A plurality of through holes 27 through which a plurality of magnetic sensitive switches 11C can be mounted are formed.

The next different point is that the signal holding means 28 for temporarily holding the output signal to be sent to the AND circuit as the input signal discriminating means 12a as shown in FIGS. 13 and 14 is provided with the key switch 1B and the AND circuit. This is the point provided between the point 12a and 12a.

Then, in the above configuration, first insert the regular magnet key 7A into the key hole 8a of the key cylinder lock 1a,
Each magnetic sensitive switch of key switch 1B 11C (S1), 11C
(S2) is turned on, and the relay of signal holding means 28 is turned on.
It becomes the state of.

Next, when the magnet key 7A is turned, the magnets g1 and g2 of the magnet key 7A will move to the magnetic sensitive switches 11C (S1), 1
The relay of the signal holding means 28 holds the output signal from the magnetic sensitive switch 11C side as it is, although it is turned off because it is separated from 1C (S2). Then, as described above, when the key switch 1B passes the position of "ON", the switch S3 is turned on, and the AND circuit 12a operates with the current of the signal holding means 28 side and the current of the switch S3 on the key switch 1B side, The output signal is sent to the engine controller 14a.

On the other hand, when pulling out the magnet key 7 from the key cylinder lock 1a, if the push button 29 for key removal provided on the handle column shown in FIG. 13 and FIG. Then, the relay of the signal holding means 28 is turned off. Then, next time the magnet key 7A is inserted into the key cylinder lock 1a and the relay of the signal holding means 28 remains OFF until the magnetic sensitive switches S1 and S2 become NO again.

Therefore, also in this embodiment, if the regular magnet key 7A is used, an output signal is sent from the AND circuit to the engine control unit 14a, and the engine is started when the starter motor is activated, while the regular magnet key is activated. If it is other than 7A, the engine will not start even if the starter motor starts.

In the different embodiment, the magnetic sensitive switch 11C is used.
Although it has been described that the signal holding means 28 for holding the signal on the side is provided, for example, the key body 7a of the magnet key 7A is formed in a cylindrical shape, and a plurality of magnets are provided in the key body.
By embedding in the circumferential direction of 7a, the magnetic sensitive switch 11C is in the closed state even if the magnetic key 7A is rotated to a predetermined angle, so in such an embodiment, the holding means 28 is unnecessary. .

In the embodiment of the present invention described above, the AND circuit 12 is connected to the control device 1
Although it is provided between the key cylinder lock 1 and the control device 14 focusing on whether or not an output signal can be sent to the magnetic key 4 (4), for example, as shown in FIG.
Even if the output signal is sent to the control device 14 (14a) by rotating A), the AND circuit 12 is connected to the switch member 11 of the key cylinder lock 1 (1a) and the starter motor 19 so that the starter motor 19 does not start. You may intervene in the electric circuit between them.

Therefore, the design of the position where the AND circuit 12 is provided can be variously changed.

"Effects of the Invention" As is apparent from the above description, the present invention has the effects listed below.

(1) Since there are few components as a whole, it can be installed at low cost.

(2) By changing the number or arrangement of the magnet pin tumblers incorporated in the key cylinder lock, it is possible to easily cause the key difference of the key itself.

(3) Since a regular magnet key to be inserted into the key cylinder lock of the vehicle and a switch member provided to the key cylinder lock that is opened / closed by inserting / removing the magnet key are used, there is a concern that the magnet key will break down. Not,
Moreover, since mechanical key cylinder locks are extremely rare, there is almost no fear that the engine cannot be started due to damage of the magnet key or failure of the key cylinder lock.

(4) Input signal discriminating means that uses the power supply signal supplied from the power source through the switch member of the key cylinder lock as information, and cuts the output signal to the supply element indispensable to the operation of the engine of the vehicle in the case other than the regular magnet key. It is very easy to install because it only needs to be installed at a suitable place in the electric circuit.

(5) A magnetic sensitive switch is used as a switch member,
In addition, since the key cylinder lock 1 is used which closes the magnetic sensitive switch through the spring up of the magnet pin tumbler by inserting the magnet key into the key hole, in this closed state, the magnet key 7 is inserted into the key hole. As long as the magnet key 7 is inserted, the magnet pin tumblers 9a and 9b are supported by the outer peripheral surface of the inner tubular member 5 even if the magnet key 7 is rotated.

Therefore, it is not necessary to provide signal holding means unlike the other different embodiments.

[Brief description of drawings]

1 to 15 show an embodiment of the present invention. Specifically, FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention,
2 to 5 are schematic explanatory views showing the main part of the present invention, FIGS. 6 and 7 are explanatory views showing the switch member of the present invention, and FIG. 8 is an embodiment shown in FIG. FIG. 9 is an electric block diagram of each of FIGS. 9 to 14 showing respective different embodiments of the present invention, and FIG. 15 is a view similar to FIG. 1 showing another different embodiment of the present invention. 1A, 1B ... key switch, 1, 1a ... key cylinder lock, 2, 2a ... outer cylinder member 5, 5a ... inner cylinder member, 7, 7A ... magnet key, g1, g2 ... magnet, 9 ... Movable obstacle, 11, 11A, 11B, 11C ... Switch member, 12, 12a ... Input signal discrimination means, 14, 14a ... Control device, 19 ... Starter motor, 20 ... In-vehicle battery, 28 ...... Signal holding means.

Claims (3)

[Claims] 1. An outer cylinder member 2 having a plurality of through holes (3, 4) in the radial direction, and a plurality of grooves rotatably received in the outer cylinder member and corresponding to the through holes. A vehicle key cylinder lock 1 comprising an inner cylinder member 5 having 6;
A magnet key 7 inserted into the key hole 8 of the key cylinder lock and having a plurality of magnets embedded in the key body 7a, and a plurality of magnets housed in the through hole and groove by inserting and removing the magnet key. A magnetic sensitive switch (11A, 11B) provided in the through hole so as to be opened and closed through movement of a pin tumbler, and an electric circuit between the magnetic sensitive switch and the control device 14 of the engine. An input signal discriminating means that cuts an output signal to a supply element indispensable for the operation of an engine of the vehicle when the power supply signal which is interposed and is supplied from the vehicle-mounted battery 20 is used as information and the magnetic key 7 is other than the regular magnetic key 7. Vehicle anti-theft device with 12. 2. A key cylinder lock for a vehicle comprising an outer cylinder member 2a having a plurality of through holes 27 in the radial direction and an inner cylinder member 5a rotatably received in the outer cylinder member and having a key hole 8a. 1a, a magnet key 7A inserted into the key hole of the key cylinder lock and having a plurality of magnets embedded in the key body 7a, and provided in the through hole so as to be opened and closed by inserting and removing the magnet key. A plurality of magnetic sensitive switches 11C are provided, and further, a power supply signal provided from the in-vehicle battery 20 is provided as information, which is interposed in an electric circuit between the magnetic sensitive switches 11C and the engine control device 14a. In the case of a magnet key other than the regular magnet key, the input signal discrimination means 12a for cutting the output signal to the supply element essential for the operation of the vehicle engine and the input signal discrimination provided in the steering wheel column of the vehicle are provided. Signal holding means 2 for temporarily holding the output signal from the magnetically sensitive switch 11C sent to the means.
Anti-theft device for vehicles with 8 and. 3. An outer cylinder member 2 having a plurality of through holes (3, 4) in the radial direction and a plurality of grooves rotatably received in the outer cylinder member and corresponding to the through holes. A vehicle key cylinder lock 1 comprising an inner cylinder member 5 having 6;
A magnet key 7 inserted into the key hole 8 of the key cylinder lock and having a plurality of magnets embedded in the key body 7a, and a magnet pin tumbler housed in the through hole and groove by inserting and removing the magnet key. A plurality of magnetic sensitive switches (11A, 11B) provided in the through hole so as to be opened and closed by movement, and further provided in an electric circuit between these magnetic sensitive switches and the starter motor 19. In addition, the power supply signal supplied from the vehicle-mounted battery 20 is used as information.
An antitheft device for a vehicle, comprising an input signal discrimination means 12 for cutting an output signal to a supply element which is essential for the operation of a vehicle engine.