JP2765116B2 - Anti-theft device for motorcycles - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a motorcycle anti-theft device, and more particularly to a motorcycle anti-theft device suitable for a battery ignition type motorcycle having a so-called side stand interlock circuit. .

(Background technology)

FIG. 2 shows a conventional example of a starting circuit for a battery ignition type motorcycle having a side stand interlock circuit.

In FIG. 2, the positive side of the battery 50, the negative side of which is grounded, is closed via the fuse 51 when the ignition switch 60 is turned on.
One contact of the position circuit is connected. This ON
One end of a lighting switch 71 is connected to the other contact of the position circuit via a power supply circuit 52. The other end of the lighting switch 71 is connected to one end of a lamp (for example, a headlamp or the like) 70, and the other end is grounded.

The ignition switch 60 is provided with a check position (hereinafter, referred to as a “C position”) between these two positions, in addition to an ON position for supplying power and an OFF (OFF) position for stopping power supply.
A battery 50 is connected to one contact of the C position circuit, and one end of a warning light (for example, an oil level warning light) 53 is connected to the other contact. This warning light
The other end of 53 is grounded. Therefore, when the ignition switch 60 is set to the C position, normally, a closed circuit consisting of the battery 50 (+) → the fuse 51 → the warning light 53 → the ground → the battery 50 (−) is formed, and the warning light
53 lights up. Thus, the C position is for checking the warning light 53. Warning light
On the ignition switch 60 side (high potential side) of 53, a circuit connected to an intermediate point (point A shown in FIG. 2) of the power supply system circuit 52 via a backflow prevention diode 54 and a detection switch 55 is provided. Is provided.

To this point A, one end of a relay coil 57a constituting a side stand relay 57 is connected via a kill switch 56. The other end of the relay coil 57a is closed when a side stand (not shown) of the vehicle is in a retracted state.
One end of the side stand switch 58 is connected. The other end of the side stand switch 58 is grounded. Also, this side stand switch 58
Is connected in parallel with a neutral switch 59 that is closed when a transmission (not shown) is set to a “neutral” position.

On the relay coil 57a side of the kill switch 56, a starter relay circuit 6 via a relay switch 57b constituting a side stand relay 57 together with the relay coil 57a.
1 is connected to one end.

The starter relay circuit 61 includes a starter switch 62 having one end connected to a relay switch 57b, and a starter relay coil 63a connected to the other end of the starter switch 62. The other end of the starter relay coil 63a is grounded. Battery 50
A starter motor 64 is connected to the plus side of the motor through relay contacts 63b and 63c that are mutually conductive by a movable contact 63d, and the other end of the starter motor 64 is grounded. The movable contact 63d and the relay contacts 63b and 63c constitute a starter relay 63 together with the starter relay coil 63a.

A connection point B between the starter relay circuit 61 and the relay switch 57b is connected to a battery type ignition device (hereinafter, referred to as "ignition device") 80.

The ignition device 80 includes an igniter 81 connected to a connection point B by an ignition system circuit 82, and an ignition coil 83 including a primary coil 83a and a secondary coil 83b each having one end connected to the middle of the ignition system circuit 82. A spark plug 84 having one end connected to the secondary coil 83b and the other end grounded, and a pickup coil having an output line connected to the igniter 81.
85, a permanent magnet (not shown) attached to the core of the pickup coil 85, and a timing rotor 86. The operation of the ignition device 80 having such a configuration will be briefly described. Since the air gap between the timing rotor projection 86a and the pickup coil 85 changes due to the rotation of the timing rotor 86, the magnetic flux passing through the pickup coil 85 changes. The amount changes, and a voltage corresponding to the change is generated at both ends of the pickup coil 85. This generated voltage appears as alternating current when the timing rotor projection 86a approaches the center of the pickup 85 and when the timing rotor projection 86a moves away from the center of the pickup 85. The AC output of the pickup coil 85 is guided to the igniter 81, so that the primary current of the ignition coil 83 is interrupted.
That is, when the output of the pickup coil 85 is positive, the potential of the base of the transistor 87 becomes higher than the operating potential, the transistor 87 is turned “ON”, and the power supply current flows through the primary coil 83a. In the case of minus, the potential of the base of the transistor 87 becomes lower than the operating potential,
The transistor 87 is turned “OFF”, the primary coil current is cut off, a high voltage is generated in the secondary coil 83b, and the ignition plug 84 is ignited.

Next, the overall operation of the starting circuit will be briefly described.

When the ignition switch 60 is “ON”, the kill switch 56 is “closed”, and either the side stand switch 58 or the neutral switch 59 is “closed”, the power supply current flows through the relay coil 57a, so that the relay The coil 57a is excited, the relay switch 57b is turned “ON”, and power is supplied to the star relay circuit 61 and the ignition device 80.

At this time, when the starter switch 62 is turned “ON”, the starter relay coil 63a is excited, the movable contact 63d is attracted, and the relay contacts 63b and 63c are turned on. Thereby, the battery 50 (+) → the starter motor 64 → the ground → the battery 50
A closed circuit consisting of (-) is formed, and the starter motor 64 operates. As a result, an engine (not shown) rotates,
Accordingly, the timing rotor 86 rotates. The ignition is performed by the rotation of the timing rotor 68 as described above, and the engine starts.

On the other hand, if the ignition switch 60 is turned “OFF” during operation of the engine, power is not supplied to the ignition mounting 80, and the engine stops.

Even if the kill switch 56 is turned "OFF", the engine stops.

In this case, the ignition switch 60 "OFF"
If you remove the ignition key in the state of, theft can be prevented for the time being.

[Problems to be solved by the invention]

However, in the above-described conventional example, all the functions of the starting system are operable by directly connecting the lead wires of the power supply circuit of the ignition switch 60 (usually, red or black lead wires are used). However, there was an inconvenience of being easily stolen.

[Object of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a motorcycle anti-theft device which solves the disadvantages of the prior art and makes it impossible to start by directly connecting a lead wire of an ignition switch power supply circuit by adding a simple circuit. .

[Means for solving the problem]

According to the present invention, a power supply circuit having a battery and an ignition switch connected to the battery, and a power supply stop control for opening and closing the power supply circuit and controlling a starter relay circuit for controlling an ignition device and a starter motor operation stop. And a side stand interlock circuit. Among these, the ignition switch has an ON position and an OFF position for opening and closing the power supply circuit, and a C position located between these two positions for opening and closing the warning light check circuit and the like. A side stand interlock circuit is provided between the side stand relay and the open / close switch, and one or more circuit open / close switches connected in series to the side stand relay for opening and closing the power supply circuit. And a control circuit for conducting the semiconductor switching element when the ignition switch is operated after passing the C position. It has a configuration. This aims to achieve the above-mentioned object.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIG.

Here, the same reference numerals are used for the same components as those in the conventional example described above.

The embodiment shown in FIG. 1 has a power supply circuit 1 having a battery 50 and an ignition switch 60 connected to the battery 50, and operates the ignition device 80 and the starter motor 64 by opening and closing the power supply circuit 1. And a side stand interlock circuit 2 for performing power supply stop control to a starter relay circuit 61 for stop control.

Among them, the ignition switch 60 has an ON position for power supply and an OFF position for power supply stop as described above.
In addition to the position, a warning light is located between these two positions
There is a C position to perform 53 checks.

The power supply circuit 1 includes a battery 50 having a grounded negative side, a power supply circuit 52 connected to the positive side of the battery 50 via a fuse 51 and an ON position circuit of an ignition switch 60, and a power supply circuit 52. And a relay switch 57b connected to the kill switch 56.

One end of the ignition device 80 is connected to the middle of an igniter 81 connected to a connection point B between a relay switch 57b and a starter relay circuit 61, and an ignition system circuit 82 connecting the two, as in the conventional example described above. An ignition coil 84 having a primary coil 83a and a secondary coil 83b, an ignition plug 84 having one end connected to the secondary coil 83b and the other end grounded, and a pickup coil 85 having an output line connected to the igniter 81. , A permanent magnet (not shown) attached to the core of the pickup coil 85, and a timing rotor 86.

The starter relay circuit 61 includes a starter switch 62 having one end connected to the point B, and a starter switch 62.
And a starter relay coil 63a connected to the other end of the starter relay 62.

The side stand interlock circuit 2 includes: a side stand relay 57; a transistor 3 as a semiconductor switching element having a collector connected to a side opposite to a power supply of a relay coil 57a of the side stand relay 57;
There is provided a side stand switch 58 serving as an open / close switch having one end connected to the emitter side of the transistor 3, and a neutral switch 59 serving as another open / close switch connected in parallel to the side stand switch 58. The other ends of these switches 58 and 59 are grounded.

C position circuit and warning light of ignition switch 60
The other end of the check circuit 10 connected to the circuit 53 is grounded via a connection circuit 11, a voltage dividing resistor 12, and a capacitor 4 connected in series with the resistor. The connection point between the capacitor 4 and the voltage dividing resistor 12 is connected to the base of the transistor 3.
Further, a voltage dividing resistor 13 is connected in parallel to the capacitor 4. As the capacitor 4, a capacitor having a small capacity that is charged in a short time after passing through the C position when the ignition switch 60 is set from the OFF position to the ON position is used. When the capacitor is almost fully charged, the base potential of the transistor 3 is set to the operating potential of the transistor 3.

In the present embodiment, these check circuit 10, connection circuit 11,
The voltage dividing resistors 12 and 13 and the capacitor 4 constitute a control circuit 5 for controlling the transistor 3.

A connection point B between the relay switch 57b and the starter relay circuit 61 is connected to the voltage dividing resistor 12 through the backflow preventing diode 6.
Are connected to the ignition switch side (high-potential side).

Other configurations are the same as those of the above-described conventional example.

 Next, the overall operation of the present embodiment will be described.

When starting the engine, first, an ignition key (not shown) is operated to turn on the ignition switch 60.
When passing through the position, the warning lamp 53 or its check circuit 10 is checked for disconnection depending on whether or not the warning lamp 53 is lit as described above. At this time, the battery 50
(+) → Fuse 51 → Check circuit 10 → Connection circuit 11 → Voltage divider 12 → Voltage divider 13 → Ground → Battery 50 (−) forms a closed circuit. Therefore, the capacitor 4 is charged by the current flowing from the battery 50 through the voltage dividing resistor 12.

After passing through the C position, when the ignition switch 60 is turned to the ON position, the capacitor 4 starts discharging, whereby a base current flows to the transistor 3 and the transistor 3 is turned on. At this time, when the kill switch 56 is “closed” and either the side stand switch 58 or the neutral switch 59 is “closed”, the power supply current flows through the relay coil 57a, so that
7a is excited, the relay switch 57b is turned “ON”, and power is supplied to the starter relay circuit 61 and the ignition device 80. At this time, a power supply current flows to the base of the transistor 3 through the diode 6 and the voltage dividing resistor 12 at the same time.

In this state, when the starter switch 62 is turned “ON”, the starter relay coil 63a is excited, and the movable contact 63d
Is attracted, and the relay contacts 63b and 63c conduct. As a result, a closed circuit including the battery 50 (+) → the starter motor 64 → the ground → the battery 50 (−) is formed, and the starter motor 64 operates. Therefore, the engine (not shown) rotates, and accordingly, the timing rotor 86 rotates. The ignition is performed by the rotation of the timing rotor 86 as described above, and the engine starts. At this time, since the relay switch 57b continues to maintain the “ON” state, the base current of the transistor 3 continues to flow through the diode 6 and the voltage dividing resistor 12, so that the engine keeps rotating. I have.

On the other hand, when the ignition switch 60 is turned “OFF” during operation of the engine, power is not supplied to the ignition device 80, and the engine stops. "OFF" the kill switch 56
Even so, the engine stops.

In this embodiment, when the lead wires [R, B shown in FIG. 1] of the ignition switch 60 are directly connected to directly connect the power supply circuit, the battery 4 and the check circuit 10 are not connected, so that the capacitor 4 is not charged. Since the base current does not flow in the transistor 3 and the transistor 3 does not conduct, the side stand relay 57
The power is not supplied to the starter relay circuit 61 with the state of "F". Because of this, the starter switch 62 is turned “ON”
However, since the starter motor 64 does not operate, the engine cannot be started.

According to the present embodiment described above, when the current does not pass through the C position of the ignition switch 60, the capacitor 4 is not charged, and the base potential of the transistor 3 does not reach the operating potential of the transistor 3. It is impossible to start the engine by directly connecting the 60 leads. Therefore, the theft of the vehicle can be effectively prevented. Further, by simply adding the transistor 3 and a simple circuit constituting the control circuit 5 of the transistor 3, a conventional ignition switch 60 and the like can be used as they are, and in this respect, an increase in cost can be effectively suppressed. .

In the above embodiment, a case where a side stand switch and a neutral switch connected in parallel to the side stand switch are used as the circuit opening / closing switch connected in series to the side relay is illustrated, but the present invention is not limited to this. For example, in the case of a manual transmission vehicle (MT vehicle), a clutch switch that detects whether or not the engine rotation is transmitted to the drive wheels is used instead of the neutral switch, similarly to the neutral switch. Or a configuration in which the neutral switch and the clutch switch are used in combination.

〔The invention's effect〕

Since the present invention is configured and functions as described above, according to this, when the lead wire of the ignition switch is directly connected by the function of the control circuit, the semiconductor switching element interposed between the side stand relay and the circuit open / close switch is used. The power supply circuit can be kept in a non-conductive state, the side stand relay that opens and closes the power supply circuit can be maintained in an “open” state, and power can be prevented from being supplied to the starter relay circuit. As in the embodiment, the control circuit can be configured by a simple circuit including a capacitor, a resistor, and the like.

Therefore, by adding a circuit having a simple configuration, it is possible to make it impossible to start the ignition switch by directly connecting the lead wire of the power supply circuit, thereby effectively preventing theft. An anti-theft device can be provided.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a configuration of one embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional example. DESCRIPTION OF SYMBOLS 1 ... Power supply circuit, 2 ... Side stand interlock circuit, 3 ... Transistor as a semiconductor switching element, 5 ... Control circuit, 10 ... Warning light check circuit, 50 ... Battery, 57 ... Side stand relay, 58
...... side stand switch as a circuit open / close switch, 59 ... neutral switch as another circuit open / close switch, 60 ... ignition switch, 61 ... starter relay circuit, 64 ... starter motor, 80 ... ignition device.

Claims (1)

(57) [Claims] 1. A power supply circuit having a battery and an ignition switch connected to the battery, and stopping power supply to a battery type ignition device and a starter relay circuit for controlling starter motor operation stop by opening and closing the power supply circuit. And a side stand interlock circuit for controlling the ignition switch. The ignition switch has an on position and an off position for opening and closing a power supply circuit, and a check position for opening and closing a warning light check circuit and the like, which is located between these two positions. Having a side stand interlock circuit, a side stand relay that opens and closes the power supply circuit, one or more circuit open / close switches connected in series to the side stand relay, and between the side stand relay and the open / close switch. Interposed And a control circuit for conducting the semiconductor switching element when the ignition switch is operated past a check position. An anti-theft device for a motorcycle.