JP2002083527A - Ignition switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ignition switch narrowing an occupying space on a key insertion port side, assembling a receiving means for receiving an ID code generated from a key side and a signal processing means for processing the ID code, and having structure preventing cut out of a conductive wire electrically connecting the receiving means and the signal processing means. SOLUTION: The receiving means 3 for receiving the ID code from a transponder 10 is fixed to the tip of a key cylinder 2, a control board 4 for verifying whether the ID code is matched with a formal one or not is fixed to the base end of the key cylinder 2, and they are electrically connected with the conductive wire 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition switch for preventing theft by starting an engine of a vehicle after collating an ID code transmitted from a key side.

[0002]

2. Description of the Related Art Generally, starting an engine of an automobile, a motorcycle, a snowmobile, an outboard motor, or the like is performed by rotating a key in a state where the key is inserted into a key cylinder. In addition, there is a conventional anti-theft ignition switch having a function of transmitting an electric signal to a vehicle. This ignition switch is disclosed in, for example, Japanese Patent Application Laid-Open No. H11-131881,
The unique ID code transmitted from the transmitter built in the key is compared with the ID code stored in advance in the vehicle anti-theft device or the like, and a signal for permitting the engine to start is transmitted only when the IDs match. Side.

The above-mentioned means for preventing the ignition switch from being stolen includes a coil for receiving the ID code fixed to the vehicle at the key insertion port side (fixed to the top bridge with screws). A control board for signal processing is disposed on the base end side of the key cylinder (on the side opposite to the key insertion port side), and these are electrically connected by conductive wires. With such a configuration, it is possible to efficiently receive the ID code transmitted from the transmitter built in the key and reduce the space on the key insertion port side.

[0004]

However, in the above-mentioned conventional ignition switch, since the coil for receiving the ID code is fixed to the vehicle side, the coil and the control board are connected by a conductive wire when the vehicle is assembled. Therefore, there is a problem in that the number of test steps such as a continuity test increases in the vehicle assembly process. That is, the above-mentioned conventional ignition switch does not meet the demand for assembling various assembly parts in a vehicle.

Further, in the above-mentioned conventional ignition switch, there is a possibility that a conductive line connecting the coil and the control board may be cut off. If the conductive wire is cut off, a circuit on the control board may be broken and the vehicle may be broken. There was also a problem that running of the car became impossible. In particular, the wiring on the key slot side is likely to be cut intentionally,
It is not preferable from the viewpoint of crime prevention.

The present invention has been made in view of such circumstances, and a first object of the present invention is to reduce the occupied space on the key insertion port side and to receive an ID code issued from the key side. It is an object of the present invention to provide an ignition switch which can be assembled and includes a signal processing means for performing signal processing of the ID code, and a second object is to electrically connect the receiving means and the signal processing means. An object of the present invention is to provide an ignition switch having a structure in which a conductive wire is hardly cut.

[0007]

According to the first aspect of the present invention,
A cylinder body having a transmitting means capable of transmitting a unique ID code in the grip portion and capable of inserting a key, a key cylinder having a cylinder cap for housing the cylinder body, and supplying power to the transmitting means At the same time, the receiving means for receiving the ID code transmitted by the transmitting means activated by the electric power is compared with the ID code received by the receiving means and the regular ID code stored in advance. Signal processing means for transmitting a signal permitting the start of the engine of the vehicle to the vehicle side, and the reception means is fixed to the tip of the key cylinder, and the signal processing means The key cylinder is fixed to the base end side, and these are electrically connected by a conductive wire.

[0008] According to this configuration, the receiving means fixed to the tip of the key cylinder supplies power to the transmitting means in the key, and the power from the transmitting means activated by this power is supplied.
When the D code is received, the ID code is transmitted as an electric signal to signal processing means fixed to the base end side of the key cylinder via a conductive wire. Here, the front end side of the key cylinder is the insertion port side of the key in the ignition switch, and the opposite side is the base end side of the key cylinder.

The invention according to claim 2 is characterized in that the transmitting means comprises a transponder, and the receiving means comprises a coil for transmitting and receiving radio waves and a magnetic material excitable to the coil.

According to this configuration, when the coil is excited by the magnetic material, a radio wave (charge wave) is transmitted, and when the transponder in the key receives the radio wave, the transponder responds by the principle of electromagnetic induction. Power (electric energy) required for The coil enters a reception waiting state after transmitting the radio wave, receives the ID code transmitted from the transponder that has obtained the electric power, and transmits the ID code to the signal processing unit via the conductive wire.

The invention according to claim 3 is characterized in that the conductive wire is wired inside the key cylinder.

According to this configuration, the ID code received by the receiving means is transmitted to the signal processing means via the conductive wire in the key cylinder.

According to a fourth aspect of the present invention, the conductive wire is disposed between the cylinder body and the cylinder cap constituting the key cylinder.

According to such a configuration, the ID code received by the receiving means is transmitted to the signal processing means via the conductive wire between the cylinder body and the cylinder cap in the key cylinder.

According to a fifth aspect of the present invention, the signal processing means is housed in an aluminum stay housing provided on a base end side of the key cylinder, and the stay which houses the signal processing means is provided. The housing is characterized by being molded with resin.

[0016]

Embodiments of the present invention will be specifically described below with reference to the drawings. The ignition switch according to the present embodiment is a switch for controlling starting and stopping of an engine in a motorcycle. As shown in FIG. 1, the ignition switch includes a key cylinder 2, a receiving unit 3, a control board 4 as a signal processing unit. The receiving means 3 and the control board 4 are connected by a conductive wire 11.

The key cylinder 2 includes a cylinder body 5 in which a rotor 12 into which a key 9 can be inserted and rotatable is provided, and a cylinder cap 6 made of aluminum die-cast which accommodates the vicinity of a right end opening of the cylinder body 5. It was done. The rotor 12 has a plurality of tumblers arranged at regular intervals in its axial direction,
Is rotatable in the cylinder body 5 only when is inserted.

A transponder 10 as a transmitting means is provided in a resin holding portion 9a of the key 9, and constitutes an immobilizer together with a receiving means 3 and a control board 4 which will be described later. Here, the immobilizer refers to a key number (unique ID code) stored in a transponder with a built-in key and a key number stored in the control board 4, which are compared based on a data communication result of an encrypted code. Controls the start of the vehicle's engine based on pass / fail.

At the right end of the rotor 12 in FIG.
An operator 13 that is rotatable together with the actuator 2 is provided, and a movable contact plate 14 having a plurality of contacts 14a is provided on the right end side of the operator 13 in the drawing. The contact 14a is a spring 1
The fixed contact plate 15 is urged toward the fixed contact plate 15 by 4b. The fixed contact plate 15 has a contact 15a wired to the vehicle corresponding to the contact 14a. The actuator 13 is provided with a spring 13a, which constantly urges the rotor 12 toward the insertion opening of the key 9 (to the left in the drawing).

A cam 17 that rotates in conjunction with the actuator 13 extends in the axial direction of the rotor 12, and a lock near the right end thereof is movable in the vertical direction in the figure when the cam 17 rotates. A bar 16 is provided. The lock bar 16 has a tip engaged with a steering shaft (not shown) to enable locking.

The receiving means 3 is fixed to the tip (the left end in FIG. 1) of the key cylinder 2, and includes a coil 7 and a magnetic body 8 in a cap portion 3a which closes the left end opening of the key cylinder 2 in the figure. Housed (see FIG. 3). The coil 7 and the magnetic body 8 are separated by a spacer 3c, and a key hole 3b is formed on the left end surface of the cap portion 3a as shown in FIG. OFF ”,“ P
USH, “LOCK”, arrows, and the like are displayed.

As shown in FIG. 3, the cap portion 3a
An insertion hole 3d is formed in the vicinity of the right-side opening of the connector. When the engagement pin 21 is inserted into the insertion hole 3d,
The cap portion 3a and the cylinder cap 6 are engaged. With such a configuration, it is possible to make it difficult to remove the cap portion 3a, so that security can be improved.

The receiving means 3 supplies power to the transponder 10 in the key 9 and receives an ID code transmitted by the transponder 10 activated by this power. That is, when the coil 7 is excited by the magnetic material 8, a radio wave (charge wave) is transmitted,
When the transponder 10 in the key 9 receives this radio wave, the transponder 10 obtains the electric power (electric energy) required for the transponder 10 to respond according to the principle of electromagnetic induction. , And is configured to receive an ID code unique to the key 9 transmitted from the transponder 10 that has obtained power.

The control board 4 includes a storage circuit for storing a proper ID code, a circuit for comparing the ID code transmitted from the key 9 with the proper ID code, and a circuit for issuing a signal for permitting the start of the engine of the vehicle. (Both are not shown), and are housed by resin molding in an aluminum stay housing 18 provided at the base end (right end in FIG. 1) of the key cylinder 2. As a result, the ID code received by the coil 7 is compared with the regular ID code stored in advance, and only when the ID codes match, a signal permitting the engine start of the vehicle is transmitted to the vehicle side. it can.

The control board 4 is connected to the conductive wire 11 extending from the coil 7 and the immobilizer circuit cord 20 extending to the ECU of the vehicle.
8 is fixed by a pin 18b in the concave portion 18a,
The resin in a flowing state is poured into the shield plate 8 and the shield plate 1
8c, it is disposed by closing the concave portion 18 (see FIG. 5). The resin poured into the concave portion 18 is solidified in a use state and exerts a shock absorbing effect and a shielding effect on the control board 4.

In this embodiment, the receiving means 3
Is fixed to the tip of the key cylinder 2 and the control board 4 is fixed to the base end of the key cylinder 2, so that the occupied space on the key insertion port side is reduced, and the receiving means 3 and the control board 4 are connected to each other. The entire ignition switch including the ignition switch can be assembled. Therefore, compared to the receiving means fixed to the vehicle side,
The continuity test step and the like at the time of vehicle assembly can be reduced, and workability can be improved.

The conductive wire 11 extends from the coil 7 to the inside of the key cylinder 2, specifically, as shown in FIG.
And between the cylinder cap 6 and the cylinder body 5
The coil 7 and the control board 4 are electrically connected by being connected to the control board 4 through the right end opening in FIG. With such a conductive wire 11, the ID code received by the coil 7 can be transmitted to the control board 4 as an electric signal.

Then, the transmitted ID code is collated with the regular ID code on the control board 4, and it is determined whether or not they match. As a result of the determination, if they match, a signal for permitting the start of the engine is transmitted to the ECU or the like of the vehicle via the immobilizer circuit code 20, while if they do not match, a signal for permitting the start of the engine is transmitted. , The starting of the engine is prevented.

As described above, the ignition switch according to the present embodiment is configured such that the conductive wire 11 connecting the coil 7 and the control board 4 is provided between the cylinder body 5 and the cylinder cap 6 and is integrated. Because
The structure is hard to be cut, and it is possible to prevent the immobilizer from being broken due to the cut and prevent the vehicle from being unable to travel. Further, since the length of the conductive wire 11 can be reduced as compared with the case where the conductive wire 11 is wired outside the key cylinder 2, it is possible to reduce adverse effects due to energy loss and noise during ID code transmission. .

Although the present embodiment has been described above, the present invention is not limited to this. For example, a groove extending in the axial direction is formed on the outer peripheral surface of the cylinder body or the inner peripheral surface of the cylinder cap. You may comprise so that a conductive line may be wired in this groove | channel. Further, the present invention is not limited to the motorcycle, and may be applied to a main switch unit for performing key operations of an automobile, a snowmobile, an outboard motor, and the like.

[0031]

According to the first aspect of the present invention, the space occupied by the key insertion port side of the ignition switch can be reduced, and the entire ignition switch including the receiving means and the signal processing means can be assembled.

According to the second aspect of the present invention, it is not necessary to dispose the power source of the transmitting means on the key side, so that the size of the key grip can be reduced and the entire ignition switch can be assembled. .

According to the third or fourth aspect of the present invention, since the conductive wire is provided in the key cylinder, it is possible to prevent the conductive wire from being cut, thereby improving security and reliability of the device. be able to.

According to the fifth aspect of the invention, since the signal processing means is resin-molded in the stay housing made of aluminum, the shielding effect is high and the influence of external noise can be reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an ignition switch according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an enlarged cross-sectional view showing a receiving unit in the ignition switch according to the embodiment of the present invention.

FIG. 4 is a front view showing an ignition switch according to the embodiment of the present invention.

FIG. 5 is a rear view showing an ignition switch according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ignition switch 2 ... Key cylinder 3 ... Receiving means 3a ... Cap part 3b ... Key hole 3c ... Spacer 3d ... Insertion hole 4 ... Control board (signal processing means) 5 ... Cylinder body 6 ... Cylinder cap 7 ... Coil 8 ... Magnetic Body 9 Key 9a Gripping part 10 Transponder (transmitting means) 11 Conductive wire 12 Rotor 13 Actuator 13a Spring 14 Movable contact plate 15 Fixed contact plate 14a, 15a Contact 14b Spring 16 Lock Bar 17 ... Cam 18 ... Stay housing 18a ... Recess 18b ... Pin 18c ... Shield plate 19 ... Resin 20 ... Imobi circuit code 21 ... Engagement pin

Claims (5)

[Claims] 1. A key body including a cylinder body having a transmitting means capable of transmitting a unique ID code in a grip portion and capable of inserting a key, and a key cylinder including a cylinder cap for accommodating the cylinder body. Receiving means for receiving the ID code transmitted by the transmitting means activated by the power, and collating the ID code received by the receiving means with a regular ID code stored in advance. And a signal processing means for transmitting a signal permitting the start of the engine of the vehicle to the vehicle side only when these coincide with each other.In the ignition switch, the reception means is fixed to a tip of the key cylinder, and The signal processing means is fixed to the base end side of the key cylinder, and these are electrically connected by a conductive wire. Ignition switch. 2. The transmitting means comprises a transponder,
2. The apparatus according to claim 1, wherein the receiving unit includes a coil for transmitting and receiving radio waves and a magnetic material capable of exciting the coil.
Ignition switch as described. 3. The ignition switch according to claim 1, wherein the conductive wire is wired inside the key cylinder. 4. An ignition switch according to claim 3, wherein said conductive wire is disposed between said cylinder body and said cylinder cap which constitute said key cylinder. 5. The signal processing means is accommodated in an aluminum stay housing disposed on the base end side of the key cylinder, and the inside of the stay housing accommodating the signal processing means is resin-molded. The ignition switch according to any one of claims 1 to 4, characterized in that: