JP3044739U - Vehicle anti-theft device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent theft without stopping the engine every time when leaving the vehicle. SOLUTION: A relay coil 3a of a first relay 3 is connected in series with a handbrake switch 1 which opens and closes by operating a handbrake. A change-over switch 4 for theft prevention is provided, and the coil 5a of the second relay 5 can be energized from one contact 4c via the contact 3b of the first relay 3. Then, the relay contact 5b of the second relay 5
Is connected in series with the ignition coil. If the changeover switch 4 is operated to the contact 4c side during the operation of the engine, the engine stops when the handbrake is released,
It does not restart unless the changeover switch 4 is operated.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a vehicle anti-theft device in which the vehicle engine is stopped by a driving operation to prevent theft.

[0002]

[Prior art]

 Conventionally, as a countermeasure against theft of vehicles such as cars and trucks, it is known to attach a sensor to a door or the like to issue an alarm, or to lock a steering wheel or the like to disable the running of the vehicle. . In motorbikes, these measures are often ineffective, and it is necessary to remove the engine key to prevent theft, which is also effective in automobiles.

[0003]

[Problems to be solved by the invention]

 However, in the conventional vehicle anti-theft system, it is necessary to finally pull out the engine key. Therefore, the engine must be stopped every time the vehicle is separated from the vehicle. It was troublesome, and there were problems such as the battery running out when the engine was restarted frequently.

The present invention has been made in consideration of the conventional problems as described above, and there is no need to stop the engine each time the vehicle is separated from the vehicle, and the simple structure and operation prevent theft. It is an object of the present invention to provide a vehicle anti-theft device capable of performing such operations.

[0005]

[Means for Solving the Problems]

 The vehicle antitheft device of the present invention has a handbrake switch that opens and closes by operating a handbrake lever, a first relay that operates according to the open / close state of the handbrake switch, and a common contact connected to a battery. A changeover switch, and a second relay to which operating power from a battery is supplied directly from a contact on one side of the changeover switch and from a contact on the other side of the changeover switch via a relay contact of the first relay. The relay contact of the second relay is connected in series with an ignition coil, and when the changeover switch is switched to one contact, the relay contact of the second relay is closed, When the switch is switched to the contact on the other side, the relay contact of the second relay is closed only when the handbrake is applied. Those configured such that.

The vehicle antitheft device of the present invention also includes a neutral switch that switches between open and closed states depending on whether the transmission is in a neutral position, and a first relay that operates according to the open and closed states of the neutral switch. A changeover switch having a common contact connected to the battery, and a changeover switch connected directly from one side of the changeover switch or from a contact on the other side of the changeover switch via the relay contact of the first relay. A second relay to which operating power is supplied, wherein a relay contact point of the second relay is connected in series with an ignition coil, and when the changeover switch is switched to a contact on one side, the second relay is connected to the second relay. When the transmission is in the neutral position when the relay contact of the relay is closed and the switch is switched to the contact on the other side Only the relay contact of the second relay is configured to be closed.

In the vehicle anti-theft device of the present invention, when the switching switch is switched by applying the hand brake, when the hand brake is released in this state, the relay contact of the second relay is opened and the engine is started. The engine will not be restarted unless it stops and the changeover switch is switched.

In the vehicle antitheft device of the present invention, when the transmission is set to the neutral position and the changeover switch is switched, the engine is stopped in the same manner as when a gear change is performed in this state, and the changeover switch is changed over. The engine will not be restarted unless it is.

[0009]

FIG. 1 is a circuit diagram showing a configuration of a vehicle anti-theft device according to an embodiment of the present invention. In the figure, a hand brake 1 is a hand brake switch that is opened and closed by operating a lever of a hand brake (side brake) of a vehicle. Lights up and is open (off) when the handbrake is released.

The first relay 3 is a first relay that operates according to the open / close state of the handbrake switch 1. A relay coil 3 a is connected in series with the handbrake switch 1, and the relay coil 3 a is connected to the relay coil 3 a. The protection diode D1 is connected. The changeover switch 4 has a common contact 4a connected to a battery and is provided with two switching contacts 4b and 4c. The contact 4 is connected to the relay contact 3b of the first relay 3. It is connected.

The second relay 5 is connected directly to the contact 4 b on one side of the changeover switch 4 and to the other contact 4 c of the changeover switch 4 via the relay contact 3 b of the first relay 3. A protection diode D2 is connected to the relay coil 5a, and a relay contact 5b is connected in series with an ignition coil (not shown). The LED 6 is a light emitting diode for confirming the open / close state of the relay contact 5b. The LED 6 is turned on when the relay contact 5b is closed. At this time, the ignition coil can be energized.

A power supply voltage is supplied from the battery to the hand brake lamp 2, the first and second relays 3, 5 and the changeover switch 4 through a main key switch.

When the changeover switch 4 is switched to the contact 4b on one side, the relay contact 5b of the second relay 5 is closed, so that the ignition coil can be energized.

That is, during normal use, the contacts of the changeover switch 4 are in a state where 4a and 4b are connected. In this state, when the ignition switch is turned on to operate the starter, the second relay 5 Since the relay coil 5a is energized and the relay contact 5b is closed, the engine can be started and the state can be maintained.

In an emergency such as when leaving the vehicle, the changeover switch 4 is switched with the handbrake applied to keep the contacts 4a and 4c connected. At this time, there is no need to stop the engine. Then, in this state, for example, when another person steals the car and releases the handbrake, the handbrake switch 1 is opened, the relay contact 3b of the first relay 3 is opened, and the relay coil of the second relay 5 is opened. The energization to 5a is stopped. Therefore, the relay contact 5b of the second relay 5 is opened, and the engine stops.

In the state where the engine is stopped, the relay contact 5b of the second relay 5 interposed in series with the ignition coil remains open, so that the engine cannot be restarted in this state. Absent. Therefore, the vehicle is prevented from being stolen. When the person returns and restarts the engine, the changeover switch 4 may be returned to the normal state.

As described above, it is not necessary to stop the engine each time when the user leaves the vehicle, and the vehicle can be prevented from being stolen with a simple configuration and operation. At that time, if someone tries to steal the vehicle, the engine simply stops when the handbrake is released, and there is no abnormality elsewhere, and the reason for stopping the engine is unknown. Therefore, it is possible to prevent vehicle damage, etc., without having to know the anger of taking anti-theft measures.

Next, another embodiment of the present invention will be described. In the above embodiment, the engine is operated when the handbrake is applied, and the engine is stopped when the handbrake is released. In the second embodiment, instead of the handbrake, the transmission is replaced. The neutral position is used.

That is, in the circuit of FIG. 1, instead of the handbrake switch 1, a neutral switch that switches between open and closed states depending on whether the transmission is in a neutral position is connected, and the second switch is provided only when the transmission is in the neutral position. The relay contact 5b of the relay 5 is closed. In this case, the handbrake lamp 2 is a neutral position display lamp. Other configurations are the same as those in FIG.

In such a configuration, if the transmission is set to the neutral position and the changeover switch 4 is switched to the contact 4c side, the engine stops when a gear change is performed to steal the vehicle. Therefore, theft of the vehicle can be prevented, and the same operation and effect as those of the first embodiment can be obtained.

When the neutral position of the transmission is used, the present invention can be applied to a motorcycle without a handbrake, an AT vehicle having an automatic transmission, and an MT vehicle having a manual transmission. By combining the conditions of the handbrake and the neutral position of the transmission, the engine can be stopped by either the handbrake or the gear change operation. In this case, theft can be more reliably prevented.

The above-mentioned handbrake switch, neutral switch, and the like can be those provided in the vehicle, so that the device can be manufactured at lower cost. Further, the changeover switch 4 may be mounted in a place where only the person can understand.

The present invention is not limited to the circuit shown in FIG. 1, and the open / close states of the contacts of each switch and relay can be changed according to the circuit configuration so as to perform the same function.

[0024]

[Effects of the Invention] As described above, according to the present invention, the engine is stopped when the handbrake is released or the gear is changed simply by switching the changeover switch, so that when the vehicle leaves the vehicle, etc. There is an effect that the engine does not have to be stopped each time, and the theft of the vehicle can be prevented with a simple configuration and operation.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a configuration of an embodiment of the anti-theft device of the present invention.

[Explanation of symbols]

1: Hand brake switch, 3: First relay, 3a
... Relay coil, 3b ... Relay contact, 4 ... Switch, 4a ... Common contact, 4b ... One side contact, 4c ...
Switching contact on the other side, 5 ... second relay, 5a ... relay coil, 5b ... relay contact

Claims (2)

[Utility model registration claims] 1. A handbrake switch that opens and closes by operating a lever of a handbrake, a first relay that operates according to the open / close state of the handbrake switch,
A changeover switch having a common contact connected to a battery, and operating power supplied from the battery directly from the contact on one side of the changeover switch and from the contact on the other side of the changeover switch via the relay contact of the first relay And a relay contact of the second relay, wherein a relay contact of the second relay is connected in series with an ignition coil, and a relay contact of the second relay when the changeover switch is switched to one contact. Is closed and the relay contact of the second relay is closed only when the handbrake is applied when the changeover switch is switched to the contact on the other side. Prevention device. 2. A neutral switch that switches between open and closed states depending on whether the transmission is in a neutral position, and a first switch that operates according to the open or closed state of the neutral switch.
Relay, a changeover switch having a common contact connected to the battery, and a direct contact from one side of the changeover switch.
A second relay to which operating power from a battery is supplied from a contact on the other side of the change-over switch via a relay contact of the first relay, wherein the relay contact of the second relay is an ignition coil; Connected in series, the relay contact of the second relay is closed when the changeover switch is switched to one contact, and the transmission is connected when the changeover switch is switched to the other contact. Wherein the relay contact of the second relay is closed only when the vehicle is in the neutral position.