JPH0826072A - Key device for vehicle - Google Patents

Abstract

PURPOSE:To provide a key device for vehicle which is advantageous in the installation workability and cost of a key coil and can reduce the intensity of the magnetic field of an antenna cpil. CONSTITUTION:The key coil 25 of an engine start preventing means is installed on the operating button 24 of the key 16 of a remote lock/release means. Since the key coil 25 is instlalled in the operating button 24 which is previously installed on the key 16, workability and cost advantageousness are secuered, The operation button 24 having the key coil 25 is installed at the surface part of the key 16, and the magnetic field of an antenna coil easily scts on the key coil 26, and the intensity (range) of the magnetic field of the antenna coil can ne reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle key provided with both a remote unlocking means for remotely controlling the unlocking of an opening / closing door and an engine start preventing means for starting an engine unless a specific key is used. It relates to the device.

[0002]

2. Description of the Related Art As a conventional vehicle key device, for example, those shown in FIGS. 6 to 9 are known (as a similar technique, Japanese Utility Model Laid-Open No. 61-115466 and Japanese Patent Laid-Open No. 63-115466).
-93649).

Reference numeral 1 is a door handle provided on a door of an automobile. The door handle 1 is provided with a key cylinder 2 for opening and closing the door (see FIG. 6). Further, a key cylinder 3 for ignition is provided at a handle root portion H in the vehicle compartment (see FIG. 9). A ring-shaped antenna coil 4 is provided around the key cylinder 3 for ignition. On the other hand, the key 5 includes a key body 6 and a key plate 7, and the key body 6 has a key coil 8, a substrate 9 and operation buttons 10 built therein. The key coil 8 is for generating a key signal S ₂ containing specific information in the magnetic field G ₁ of the antenna coil 4, and is inserted into the cavity 6 a of the key body 6 while being wrapped in the soft resin 11. ing. The board 9 has a transmitter 12 so that an unlocking signal S ₁ is transmitted when the operation button 10 is pressed.

This key device has two functions.
That is, the door can be unlocked and locked remotely by the key 5, and even if the key cylinder 2 of the door is illegally unlocked, the engine cannot be started unless the specific key 5 is used. This is the engine start prevention function.

The remote unlocking function (see FIG. 6) means that the operator pushes the operation button 10 of the key body 6 at a position away from the door (door handle 1) to unlock from the transmitter 12 of the board 9. lock signal S ₁ is issued,該解lock signals S ₁
Is received by the receiving unit 13 of the door to unlock or lock the door lock device (not shown).

As for the engine start prevention function (see FIG. 9), first, the key plate 7 of the key 5 is inserted into the key cylinder 3 for ignition, and the key coil 8 built in the key body 6 is inserted into the antenna coil 4. Magnetic field G
Located within ₁ . Then, since the key signal S ₂ containing the specific information from Kikoiru 8 is issued, to detect the key signal S ₂ by the engine control unit (not shown) provided on the vehicle body side. Then, the information of the detected key signal S _{2 and} the information for judgment are compared with each other, and the engine start permission signal is outputted to the engine control unit only when the contents of the both match. Therefore, since the engine cannot be started unless the specific key 5 is used, the vehicle may be stolen even if the key cylinder 2 of the door is unlocked or the duplicate key is created without using the key 5. There is no.

[0007]

However, in such a conventional technique, the key coil 8 is made of the soft resin 1.
Since a mounting structure is adopted in which the key body 6 is wrapped and inserted into the hollow portion 6a of the key body 6, when the temperature rises, the soft resin 11
There is a risk that the repulsive force of the soft resin 11 will fall and the soft resin 11 together with the key coil 8 will fall out from the hollow portion 6a of the key body 6. Therefore, the soft resin 11 must be fixed in the cavity 6a of the key body 6 by using an adhesive or the like, which is very disadvantageous in terms of workability and cost.

Further, the key coil 8 as described above is attached.
On the other hand, the key coil 8 is located in the center of the inside of the key body 6.
Therefore, from the antenna coil 4 (see FIG. 8)
Magnetic field G₁Is weak, the magnetic field G₁For the key coil 8
It becomes less effective. Therefore, the output of the antenna coil 4
The magnetic field G₁Need to increase the range of
But too much magnetic field G₁Too strong, for example, the key
If you are using 5 in a bundle with other keys 14,
(See FIG. 9), the magnetic field G is also applied to the other keys 14.₁And
The key coil 15 of the other key 14 is used to
-5 key signal S₂Another signal that causes interference with
The magnetic field G ₁Strength of
It is desirable that the enclosure should be as small as possible.

The present invention has been made by paying attention to such a conventional technique, and is advantageous for the workability of attaching the key coil and the cost, and for the vehicle in which the strength of the magnetic field of the antenna coil can be reduced. A key device is provided.

[0010]

In order to achieve the above-mentioned object, a vehicle key device according to the present invention is provided with a key coil of an engine start prevention means on an operation button of a key of a remote unlocking means. is there.

[0011]

According to the vehicle key device of the present invention, since the key coil is provided in the operation button originally attached to the key, the work for attaching only the key coil to the key is unnecessary, and in terms of workability and cost. Be advantageous. Further, since the operation button having the key coil is provided on the surface of the key, the magnetic field of the antenna coil is easily applied to the key coil as compared with the conventional case where the key coil is provided in the center of the inside of the key. . Therefore, the strength (range) of the magnetic field of the antenna coil can be reduced, and malfunctions when a plurality of keys are bundled and used can be prevented in advance.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described with reference to FIGS.
It will be described based on. The same parts as those in the prior art are designated by the same reference numerals, and a duplicate description will be omitted.

First, the structure of the key 16 of this embodiment will be described with reference to FIGS. A back side portion of the key body 17 is a detachable cover 18 by an engagement structure (not shown), and the inside of the key body 17 has a hollow structure. Inside the key body 17, the transmitter 1
Board 21 having 9 and switch section 20, and battery 2
2 are provided. Opening 2 on the surface of the key body 17
3 is formed, and an operation button 24 made of resin is provided in the opening 23. A key coil 25 is previously provided inside the operation button 24 by insert molding. The remote unlocking function and the engine start preventing function of this embodiment will be described below.

Remote unlocking function (see FIG. 3)

When the operation button 24 of the key body 17 is pressed,
When the switch section 20 is pushed, the unlocking signal S ₁ by "electromagnetic wave" is emitted from the transmitting section 19 of the substrate 21. Solution lock signals S ₁ are received by the receiving circuit 27 of the solution locking portion 26 provided on the door side, the solution to the control circuit 28 lock signals S ₁
To convey. If the current state is the locked state, the control circuit 28 recognizes the unlocked signal S ₁ as the “unlocked signal”,
If the current state is the unlocked state, it is recognized as a "locking signal" and the door lock device 29 is operated.

Engine start prevention function (see FIG. 4)

The key plate 7 of the key 16 is inserted into the key cylinder 3 for ignition, and the key coil 25 built in the key body 17 is positioned in the magnetic field G ₂ of the antenna coil 4. Then, since the key signal S ₂ including specific information is issued from the key coil 25, this key signal S ₂ is amplified by the amplifier circuit 30, and the engine control unit 3
The detection circuit 32 of No. 1 detects. And the control circuit 3
3, the information of the detected key signal S ₂ is compared with the determination information, and the engine start permission signal is output to the engine control unit 34 only when the contents of the two match. Therefore, if the key 16 is not used, the engine will not start, and the vehicle may be stolen even if the key cylinder for the door is unlocked or the duplicate key is made without using the key 16. There is no.

Since the key coil 25 is built in the removable operation button 24, the key coil 2
Even when changing the number 5, only the operation button 24 needs to be replaced, and the maintainability is good.

Further, since the operation button 24 is provided on the surface of the key body 17, the magnetic field G ₂ of the antenna coil 4 easily reaches the key coil 25 provided in the operation button 24. Therefore, the strength (range) of the magnetic field G ₂ of the antenna coil 4 in this embodiment is smaller than the strength (range) of the conventional magnetic field G ₁ , and a plurality of keys 14 and 16 are used in a bundle. However, the magnetic field G ₂ does not reach the key coil 15 of the other key 14.

In the above description, the unlocking signal S ₁ by "electromagnetic wave" is taken as an example, but it may be a signal by "infrared ray" or "ultrasonic wave".

Further, the door to which the key device of the present invention is applied is not limited to the front door or the rear door on the side of the automobile, but may be a back door or a trunk lid on the rear of the automobile.

[0022]

The vehicle key device according to the present invention has the contents as described above, and since the key coil is provided in the operation button originally attached to the key, only the key coil is attached to the key. Is unnecessary, which is advantageous in terms of workability and cost.

Further, since the operation button having the key coil is provided on the surface of the key, compared to the conventional case where the key coil is provided in the center of the inside of the key,
The magnetic field of the antenna coil is easily applied to the key coil.
Therefore, the strength (range) of the magnetic field of the antenna coil can be reduced, and malfunctions when a plurality of keys are bundled and used can be prevented in advance.

[Brief description of drawings]

FIG. 1 is a plan view showing a key according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line SA-SA shown in FIG.

FIG. 3 is a diagram showing a remote unlocking function.

FIG. 4 is a diagram showing an engine start prevention function.

FIG. 5 is a view showing a state in which a key is inserted in an ignition key cylinder.

FIG. 6 is a perspective view of a door handle showing a conventional vehicle key device.

FIG. 7 is a plan view showing a conventional key.

8 is a cross-sectional view taken along the line SB-SB shown in FIG.

FIG. 9 is a view showing a state in which a conventional key is inserted in an ignition key cylinder.

[Explanation of symbols]

 16 keys 24 operation buttons 25 key coils

Claims (4)

[Claims] 1. A key device for a vehicle, comprising: an engine start preventing means for starting an engine unless a specific key is used; and a remote unlocking means for remotely controlling unlocking of a door. A key device for a vehicle, wherein a key coil of a start preventing means is provided on an operation button of a key of a remote unlocking means. 2. A door lock device is provided with a transmitting portion for transmitting an unlocking signal on a key, and an operation button for transmitting an unlocking signal from the transmitting portion is provided on a surface portion of the key, and the unlocking signal from the transmitting portion is provided. Remote unlocking means provided with an unlocking unit for unlocking or locking the door lock device on the vehicle body by receiving a locking signal, and an antenna coil is provided around the ignition key cylinder, and specific information is provided in the magnetic field of the antenna coil. Is provided with a key coil for generating a key signal including a key signal, the key signal is detected, the information of the key signal is compared with the determination information, and the engine control unit is permitted to start the engine only when the contents of the two match. A vehicle key device, comprising: an engine start prevention means provided on a vehicle body with an engine control unit that outputs a signal; and a key coil of the engine start prevention means, Vehicle key device, characterized in that provided in the operation button 隔解 locking means. 3. The vehicle key device according to claim 2, wherein the antenna coil of the engine start prevention means has a ring shape surrounding the periphery of the ignition key cylinder. 4. The vehicle key device according to claim 2, wherein the unlocking signal emitted from the transmitter of the remote unlocking means is any one selected from electromagnetic waves, infrared rays and ultrasonic waves.