JPH0553667B2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a vehicle anti-theft device.

[Technical background of the invention and its problems] The conventional anti-theft device for a vehicle shown in FIG. 1 is controlled by a controller 5 operated by a battery 1. This controller 5 is composed of transistors, logic ICs, microcomputers, etc., and specifically, for example, "THEF DETERRENT CONTOROLLER,
10BTDC1” (AUTO RADIO SERVICE
BULLETIN, April, 1980). As an example, FIG. 1 shows a microcomputer consisting of a CPU 5a, a ROM 5b, a RAM 5c, and an input/output interface 5d. The input/output interface 5d of the controller 5 is connected to the ignition switch 3, door switch 7, hood switch 9, trunk switch 11, door lock detection switch 13, and key cylinder unlock switch 15.
are connected, and the operating status of each of these switches is monitored by the controller 5. The door switch 7 is attached to each door and is turned on when the door is opened and turned off when the door is closed. Food switch 9 is
This is a switch installed in the engine compartment that turns on when the hood is opened and turns off when it is closed. The trunk switch 11 monitors the opening/closing state of the trunk, and
This is a switch that turns on when the trunk is opened and turns off when it is closed. The door lock detection switch 13 is a switch that is linked to the lock knob of the door, and is turned off when the door is locked and turned on when the door is unlocked. The key cylinder unlock switch 15 is a switch that is attached to a key cylinder of a door or a trunk, and is turned on only when the key cylinder is turned to the unlocking side by a key and the lock is unlocked. The controller 5 also includes the input/output interface 5d.
An indicator lamp 17 and a relay 19 are connected which are controlled via. The indicator lamp 17 is installed in the meter or on the instrument panel, and is controlled by the controller 5 to display various conditions.The relay 19 is driven by an alarm signal from the controller 5. This activates the light 21 and horn 23 to generate an alarm.

The conventional vehicle anti-theft device configured as described above operates as shown in the flowchart shown in FIG. That is, the ignition switch 3 is in the off state, the doors, the hood, and the trunk are closed, and the corresponding door switch 7, hood switch 9, and trunk switch 11 are in the off state,
When the door lock is in the unlocked state and the door lock detection switch 13 is in the on state, these states are detected by the controller 5 and the vehicle anti-theft device is in the released state (step 1).
00), the indicator lamp 17 is off (step 110). When the door is opened in this state, the door switch 7 is turned on and the indicator lamp 17 blinks (step 120,
130). Then, when you operate the door lock knob to lock the door, the door lock detection switch 1
3 is turned off, the indicator lamp 17 changes from a blinking state to a continuous lighting state (step 14).
0,160), thereby indicating that the vehicle anti-theft device is now in a state where the alert state can be set.
In step 140, if the door is closed without being locked, the door lock detection switch 13 is on and the door switch 7 is off, so the indicator lamp 17 goes out and remains in the unlocked state. (Step 140, 1
50). In addition, after the indicator lamp 17 lights up continuously, indicating that the warning state can be set, the ignition switch 3 is turned on.
Alternatively, when the key cylinder unlock switch 15 is turned on, the indicator lamp 17 goes out and returns to the unlocked state (step 170). however,
When all the doors are closed and the door switch 7 is turned off without turning on the ignition switch 3 or the key cylinder unlocking switch 15, the vehicle anti-theft device becomes alert and at the same time the timer starts operating. (Step 180,
190). At this time, the indicator lamp 17
The indicator lamp 17 remains lit, but when the timer finishes driving after a certain period of time, the indicator lamp 17 automatically turns off (steps 210 and 22).
0) indicates that the vehicle anti-theft device has entered the alert state. In this manner, it is possible to confirm that the vehicle anti-theft device is in a completely alert state by the display operation in which the indicator lamp 17 turns off after a certain period of time after the door is closed. When the ignition switch 3 or the key cylinder unlock switch 15 is turned on while the timer is operating, the indicator lamp 17 goes out and the vehicle anti-theft device returns to the unlocked state (steps 200 and 100). Next, when the ignition switch 3 or key cylinder unlock switch 15 is turned on while the vehicle anti-theft device is in the alert state, the alert condition is unlocked and the vehicle anti-theft device returns to the unlocked state. (Step 23)
0,100), neither the ignition switch 3 nor the key cylinder unlock switch 5 is turned on, and either the door, hood, or trunk is opened, and the door switch 7, hood switch 9, or trunk switch 11 is turned on. When the vehicle anti-theft device is in the on state, the vehicle anti-theft device is in the alarm state (steps 240, 250), and the controller 5 generates a warning signal, which causes the relay 1 to be activated.
9 to activate the light 21 and horn 23 to generate an alarm. Here, at the same time as the alarm state is entered, the timer starts operating and stops the alarm state after a certain period of time (steps 250, 270, 280), and the battery is consumed by the light 21 and horn 23 that display the alarm state. It prevents being However, even when the alarm is stopped, if the ignition switch 3 or key cylinder unlock switch 15 is not turned on, the system returns to the alert state and monitors the door switch 7, hood switch 9, and trunk switch 11. However, if any of these switches is again on, the alarm is again activated (steps 280, 230, 240, 250). This loop operation is repeated until the key cylinder unlock switch 15 is turned on in the alarm state, and only when the door is unlocked by the key and the key cylinder unlock switch 15 is turned on, the vehicle The alarm state of the anti-theft device is released and returns to the released state. (Step 2
60).

However, in conventional vehicle theft prevention devices that operate in this manner, the procedure for setting the controller 5 to the alert state as described above is to open the door, lock the door by operating the lock knob, and then close the door. It is only effective when you perform the so-called keyless lock operation, which is called tightening.
There was a problem with the device's setup that the alert state could not be set when the door was locked with the key to prevent the key from being locked in.

Furthermore, in such a conventional vehicle anti-theft device, the key cylinder unlocking switch 1
5 and other switches, uniquely determining the input timing of the signals from each switch in accordance with the flowchart shown in Fig. 2 takes into consideration the backlash of the door key cylinder lock itself and the rod connecting the lock and knob. Strict precision was required in the installation of each of the switches, as the movement of the locks could deteriorate due to play in the joints or freezing at low temperatures due to weather conditions.

[Purpose and Summary of the Invention] This invention has been made in view of the above, and its purpose is to detect when one of the opening/closing bodies provided on the vehicle body is in an open state without performing a predetermined opening operation. For vehicles, the alert state for detecting and warning vehicle theft prevention can be set reliably even when the opening/closing body is locked with a key, and furthermore, strict precision is not required for mounting component parts, etc. An object of the present invention is to provide an anti-theft device.

In order to achieve the above object, this invention provides the third
As shown in the figure, an engine stop detection means 51 detects whether the engine has stopped operating based on the state of the ignition switch 3, etc., an open/close state detecting means 53 which detects the open/close state of an opening/closing body provided on the vehicle body, and lock detection means 63 for detecting that the body is locked without using a key, the engine stop detection means 51, the open/close state detection means 53, and the lock detection means 6.
When the signal from 3 is input and it is detected that the door is locked without using the key when the engine is stopped,
In a vehicle anti-theft device having a theft alarm determination means 61 that detects and issues an alarm when any of the opening/closing bodies is opened without a predetermined opening operation being performed, detecting that the vehicle is locked with a key. key lock detection means 57 for outputting a locking signal, timer means 59 for starting driving upon input of the locking signal and outputting a timer signal for a certain period of time, and locking state detection means for detecting that all of the opening/closing bodies are locked. means 55, and the theft alarm determination means 61
The key lock detection means 57 is detected when the fully opening/closing body is in the closed state.
Even when it is detected that the lock is locked with the key and the locked state is detected after a certain period of time determined by the timer means 59, it is determined that one of the opening/closing bodies has been opened without a predetermined opening operation being performed. The purpose is to detect and issue an alarm.

[Embodiments of the Invention] Examples of the invention will be described below with reference to the drawings.

This embodiment shows one embodiment of the present invention, and has the same configuration as the one in FIG. 1 except that the function realizing means inside the controller 5 is different in the configuration shown in FIG. 1. The illustration will be used and its explanation will be omitted. Therefore, only the operation of this embodiment will be explained with reference to the flowchart shown in FIG. In addition, in the flowchart of FIG. 4, the steps that are the same as those in the flowchart of FIG.
The same step numbers are assigned and the explanation thereof will be omitted.

In the flowchart of FIG. 4, first, in step 121 provided in place of step 120 of FIG. 2, after the door switch 7, hood switch 9, and trunk switch 11 are all turned off, When all opening/closing bodies such as the trunk are locked with keys and a key cylinder lock switch (not shown) is thereby turned on, the timer, which is the timing means of the present invention, starts operating as shown in FIG. (Steps 400, 401). If the door lock detection switch 13 is turned on when the timer has run for a certain period of time and ends, the vehicle anti-theft device enters a semi-alert state and the indicator lamp 17 lights up. In this way, the timer is activated after the key cylinder lock switch is turned on, and then the OFF state of the door lock detection switch 13 is checked. Even if the operation of the door lock detection switch 13 becomes poor due to looseness in the connecting part of the connecting rod, or the movement of the lock becomes poor due to freezing at low temperatures due to weather conditions, the vehicle anti-theft device will not work properly. It is possible to operate reliably and enter a semi-alert state, and then further into an alert state.

Furthermore, in the flowchart of FIG. 4, even after the door lock detection switch 13 is turned off during the keyless lock operation of the switches 121 to 170, the indicator lamp 17 remains blinking, indicating that the door is completely closed. The indicator lamp 17 is then turned on (steps 181 and 190) to clearly notify the driver that the door is ajar or that he or she has forgotten to close it. Also,
The indicator lamp 17 lights up, the timer operates, and when the door is opened and the door switch 7 is turned on when the vehicle is in a semi-alert state, the vehicle anti-theft device goes into the deactivated state and the indicator lamp 17 changes from the lit state to the off state. Then, it immediately returns to a blinking state (step 205). This is done in case someone is inside the car when the door is locked and closed, so even if the door is opened while the indicator lamp 17 is on, the alarm is not set and the alarm is released. .

Note that in the embodiment described above, the switches 121, 1
51,181, in addition to the door switch 7,
Since the states of the hood switch 9 and trunk switch 11 are also monitored, a warning state can be set when all the doors are closed and locked when the trunk and hood are closed.

[Effects of the Invention] As explained above, according to the present invention, the anti-theft device for a vehicle is provided with a timer means for detecting a locking operation by a key and outputting a timer signal for a certain period of time, and when outputting the timer signal, the timer means is provided. When it is detected that all the opening/closing bodies provided on the vehicle body are closed and locked, it is detected that one of the opening/closing bodies has become open without a predetermined opening operation being performed. Since a warning state is set to issue an alarm, the warning state for vehicle theft prevention can be set even when the key is used to lock the vehicle. The alert state can be reliably set without requiring great precision.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing a conventional vehicle anti-theft device and an embodiment of the present invention, FIG. 2 is a flowchart illustrating the operation of the conventional vehicle anti-theft device, and FIG. 3 is a diagram corresponding to complaints. FIG. 4 is a flowchart showing the operation of an embodiment of the present invention, and FIG. 5 is a signal waveform diagram showing the operational relationship in FIG. 4. (Explanation of the symbols representing the main parts of the drawing) 5
1... Engine stop detection means, 53... Open/close state detection means, 55... Locked state detection means, 57...
Key lock detection means, 59...Timer means, 61
...Theft alarm determination means, 63... Lock detection means.

Claims (1)

[Scope of Claims] 1. Engine stop detection means for detecting engine stoppage based on the state of an ignition switch, etc.; Opening/closing state detecting means for detecting the open/closed state of an opening/closing body provided on a vehicle body; and the opening/closing body. locking detection means for detecting that the engine is locked without using a key; signals from the engine stop detection means, open/closed state detection means and lock detection means are inputted to detect whether the engine is locked without using a key when the engine is stopped; a theft alarm determination means for detecting that one of the opening/closing bodies is in an open state without performing a predetermined opening operation and giving an alarm when detecting that a predetermined opening operation is not performed; Key lock detection means detects that the lock is locked and outputs a lock signal; timer means starts driving upon input of the lock signal and outputs a timer signal for a certain period of time; and detects that all of the opening/closing bodies are locked. and a locked state detecting means, the theft alarm determining means detects that the fully opening/closing body is in the closed state and is locked with a key by the key lock detecting means, and is in the locked state after a certain period of time determined by the timer means. A vehicle anti-theft device that detects and issues an alarm when any of the opening/closing bodies is opened without a predetermined opening operation being performed.