JPH02208152A - Theft prevention device for vehicle - Google Patents

Abstract

PURPOSE:To find a stolen vehicle easily and prevent an error action by making an engine stop device or an alarm device act in linkage with a receiving device which can be called up by telephone, and at the same time, making these actions delayed, and making these actions stop during the delayed time by means of a reset switch. CONSTITUTION:In the case of a vehicle having been stolen, a receiving device 12 is called up by telephone, and then, a call up signal is detected by means of a detection circuit 13. The detection circuit 13 outputs a detection signal through a delay circuit 17, and because of this, a transistor 16 becomes ON, and a relay coil 10 is excited after the lapse of a predetermined time. As a result, a relay contact point 11 is closed, and electricity feed is done to an engine stop device 2, a horn 3, a switching on/off circuit 4 and a hazard lamp 6 through an electricity feed wire 8. When the calling up signal of the vehicle is dialed wrongly, the detection signal is outputted with the delay of a predetermined time by means of the delay circuit 17, and so, during this time, a driver pushes a reset switch 18 and the calling signal is released.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a vehicle theft prevention device. 《Prior Art》 Vehicles are generally equipped with door locks and handle locks, and these locks are used to prevent the vehicle from being stolen. The device may be unlocked or stolen. For this reason, for example,
As disclosed in Publication No. 46, a device has been developed that prevents theft by sounding a horn and notifying people outside unless the key switch is turned on within a specified time after the door is opened. ing. However, although this conventional device is designed to prevent vehicle theft, it is not effective if the driver leaves the vehicle with the keys in the vehicle, and when the driver returns later, the vehicle is stolen. In the worst case scenario, the stolen vehicle may be used in an incident. On the other hand, in order to recover a stolen vehicle, for example, in the case of a cash transport vehicle, the driver or guard has a wireless switch, and in the event that the cash transport vehicle is robbed, the driver or guard can press this switch. , the vehicle's engine stop device is turned on to prevent the cash transport vehicle from escaping. (Problem to be solved by the invention) When using such radio, the distance that radio waves can reach is very narrow, about 100 meters at most due to the Radio Law, etc. If you are nearby, it will be stolen right in front of your eyes, so it is possible to deal with it by pressing the switch immediately.
As with any regular vehicle, if you return to the location where you left the vehicle and the vehicle is lost and stolen, the radio waves will not reach you even if you press a switch using such a radio, and you will not be able to stop the vehicle. There wasn't. In order to solve such problems, the applicant has developed a so-called pager, a receiving device that operates by receiving a call signal issued when a vehicle is stolen using a telephone line, and a pager that operates in conjunction with the operation of this receiving device. The company has previously filed an application for a vehicle anti-theft device equipped with an activated alarm device. However, such a pager can sometimes be called by incorrect dialing, and even if the pager has not been stolen, the alarm system may be activated or the W4 operation may occur, which causes the engine to stop. SUMMARY OF THE INVENTION The present invention has been made based on the above problem, and it is an object of the present invention to provide a vehicle theft prevention device that can easily find a stolen vehicle even if it is stolen, and can prevent malfunctions. This is the purpose. [Structure of the Invention] (Means for Solving the Problems) The present invention provides a receiving device that is installed in a vehicle and operates by receiving a call signal issued when a vehicle is stolen using a telephone line, and a receiving device that operates by receiving a call signal issued when a vehicle is stolen. An engine stop V device or alarm device that operates in conjunction with the engine stop device or alarm device, and is provided between this receiving device and the engine stop device or alarm device, and is configured to activate the engine stop device or alarm device after a predetermined time delay from the operation of the receiving device. The engine stop device or alarm device is configured to include a delay means for operating the engine, and a switch means for disabling the operation of the engine stop device or the alarm device by operating the delay device during the delay operation of the delay device. (Function) If the receiving device is activated by mistake, if the switch means is operated within a predetermined delay time, the operation of the engine stop device or alarm device will be disabled, and these will not operate, thereby preventing malfunction. (Example) Hereinafter, an example of the present invention will be described in detail based on the drawings. In FIG. 1, 1 is a battery installed in a vehicle. Reference numeral 2 denotes a vehicle engine stop device, which stops, for example, fuel injection when power is supplied. 3 is a horn equipped on the vehicle, 4 is a blinking circuit for blinking headlights 5, and 6 is a hazard lamp. these horns 3
, the blinking circuit 4 and the hazard lamp 6 are connected to the battery 1 by the engine key through an alarm unit 7 which operates or blinks them for a predetermined time to indicate an abnormality as a warning. It is connected to the battery 1 by a separate power supply line 8. A warning device with these horn 3, headlights 5, hazard lamps 6, etc.! 3A is configured. Further, the engine stop device 2 is also connected to the battery 1 via a power supply line 8 . Reference numeral 9 denotes a relay consisting of a relay coil 10 and a normally open relay contact 11 inserted and connected to the power supply line 8. Reference numeral 12 denotes a receiving device that is hidden in the vehicle and can be called by a calling signal using a telephone line, and is called a "pager." This receiver [12
When called, it outputs a ringing signal, causes the speaker to ring, outputs a continuous ring tone of "pippipip...", and flashes a display lamp. Reference numeral 13 denotes a detection circuit for a ringing signal, which includes a sound pressure sensor 14 such as a microphone when detecting a ringing tone, and the frequency or continuous sound of the sound detected by the sound pressure sensor 14 is analyzed by an arithmetic circuit 15. When the sound detected by the sound pressure sensor 14 matches the frequency of the ringing tone, or when a continuous tone due to the ringing tone is output at a predetermined time, a detection signal is output, for example, to drive the relay coil 10. The transistor 1G is turned on, the relay contact 11 is closed, and the power supply line 8 is supplied with power. A delay circuit 11 is provided between the detection circuit 13 and the transistor 16, and delays the output of the detection signal to the transistor 1B for a predetermined time (for example, 30 seconds). 18 is a reset switch that is hidden in the vehicle so that only some people such as the driver can see it, and the delay circuit 17
The output of the detection signal to the transistor 16 is stopped by pressing and operating it within the predetermined time during which the output of the detection signal is delayed. 19 is a return circuit that automatically returns the reset switch 18;
When a predetermined time (for example, 2 minutes) has elapsed after pressing the button, the reset switch 18 is automatically reset to return to the standby state for the next detection signal. In the anti-theft device of the present invention configured as described above, since the relay contact 11 is normally open, power is not supplied to the engine stop device F2 or the alarm device 13A via the power supply I18. If the vehicle is stolen, when the receiving device w! 12 is called by dialing the calling number of the receiving device 12 using a nearby telephone, the calling signal is detected by the detection circuit 13, and the detection circuit 13 is the delay circuit 17
After a predetermined period of time has elapsed, the transistor 16 is turned on and the relay coil 1 is turned on.
0 is energized by current flowing through it, thereby relay contact 1
1 is closed, and power is supplied to the engine stop device W12, the horn 3, the blinking circuit 4, and the hazard lamp 6 via the power supply line 8. Therefore, the stolen vehicle will stop and be unable to escape any further, and the alarm system [3A will be activated, so the stolen vehicle will be conspicuous and easily discovered. On the other hand, if the authorized driver is driving the vehicle and the vehicle's calling number is dialed by mistake, the delay circuit 17 will delay opening for a predetermined time and output the detection signal, so the driver will be hidden during that time. By pressing the reset switch 18, the calling signal is canceled, the output of the detection signal is stopped, and the operation of the engine stop device [2 and alarm device 13A is disabled and does not operate. Therefore, even if the call number is dialed inadvertently, the driver can stop the output of the flashlight signal, which prevents malfunctions, and prevents the vehicle from stopping or the alarm device 3A from operating even though the vehicle has not been stolen. can. Incidentally, since the reset switch 18 may be forgotten to be released after being operated, the reset switch 18 is automatically reset by the reset circuit 19. In this way, the receiving device W11 that can be called by telephone
By interlocking with 2 and causing the vehicle to stop, or by generating an alarm and causing it to take abnormal actions, it is possible to easily locate the stolen vehicle. By stopping the output of the detection signal, it is possible to prevent malfunctions due to incorrect dialing, etc. Although one embodiment of the present invention has been described in detail above, it can be modified as appropriate within the scope of the gist of the present invention. For example, the detection circuit 13 detects a call based on the sound of the receiving device 12, but it is also possible to install a phototransistor at a location where the light of the indicator lamp of the receiving device 12 can be detected, and detect a call by the blinking of this indicator lamp. good. Also,
The delay circuit 17 may be provided anywhere as long as it can open the relay contact 11 after a predetermined time delay after the calling signal is output. Furthermore, a switch other than the relay 9 may be used to open and open the power supply line 8. Moreover, if the inside of the receiving device 12 can be modified, as shown in FIG.
The line leading to 213 may be used to detect the calling signal. [Effects of the Invention] As described in detail above, according to the present invention, the engine stop device or alarm device is operated in conjunction with a receiving device that can be called using l1g, and the operation/operation of the engine stop device or alarm device is controlled. By delaying the operation and stopping the operation with a reset switch during that time, even if the vehicle is stolen, the stolen vehicle can be easily found, and the vehicle anti-theft device can prevent malfunction due to a wrong dial. can be provided.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing one embodiment of the present invention, and FIG. 2 is a circuit diagram showing another embodiment. 2...Engine stop device 3A...Alarm device 12...Receiving device 11...Delay circuit (delay means) 18...Reset switch (switch means)
Patent attorney Mamoru Ushiki

Claims (2)

[Claims] (1) A receiving device installed in a vehicle and activated by receiving a call signal issued when a vehicle is stolen using a telephone line;
an engine stop device for the vehicle that is stopped in conjunction with the operation of the receiver; and an engine stop device provided between the receiver and the engine stop device that stops the engine after a predetermined time delay from the operation of the receiver. A vehicle anti-theft device comprising: a delay means for stopping the engine; and a switch means for disabling the stopping operation of the engine stop device by operating the delay means during the delayed operation. (2) a receiving device installed in the vehicle and activated by receiving a call signal issued when the vehicle is stolen using a telephone line;
an alarm device that is operated in conjunction with the operation of the receiving device;
a delay means provided between the receiving device and the alarm device, which operates the alarm device after a predetermined time delay from the activation of the receiving device; and by operating the delay means during the delayed operation, the alarm device operates. An anti-theft device for a vehicle, comprising: a switch means for disabling the anti-theft device.