JPH0511183B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a keyless opening/closing device for a vehicle door, and particularly to a keyless opening/closing device for a vehicle door that automatically locks and unlocks the door using weak radio waves. .

[Prior Art] A keyless opening/closing device has been proposed that automatically locks and unlocks vehicle doors using weak radio waves, thereby eliminating the hassle of opening and closing doors by key operation (Japanese Patent Application Laid-Open No. 1989-1999). No. 33987).

That is, the device includes a portable transmitter and a receiver installed on the vehicle side, and when a door unlock switch on the transmitter side is pressed, the receiver catches the radio wave and the vehicle door is unlocked. Also, the door is locked by pressing the door lock switch on the transmitter side.

The previous state will be maintained unless the switch on the transmitter side is pressed again.

[Problems to be solved by the invention] Conventional problems The above operation is not limited to when the switch is pressed by the owner of the transmitter, but the door is also locked when the switch is pressed unconsciously. or unlocked. Therefore, if the switch is pressed inadvertently, for example when the driver has the transmitter in his pocket, or if the switch comes into contact with another object and is pressed unconsciously, the door may become unlocked. It may become.

In this case, the driver does not notice this and assumes that the door is still locked, and if he leaves the vehicle, the door will be left unlocked, creating a risk of vehicle theft. . Then, the door locks are controlled against the will of the return machine owner, and the driver only notices that the vehicle is unlocked when he returns to the vehicle.

Purpose of the Invention This invention was made to solve the above problem, and if the door is not opened within a predetermined time after the vehicle door unlock signal is sent from the transmitter, all doors are automatically unlocked. The purpose of the present invention is to provide a keyless opening/closing device for a vehicle door, which is capable of locking the door of the vehicle to prevent vehicle theft, and which is capable of controlling the door lock according to the intention of the owner of the transmitter to lock or unlock the door. do.

[Means and effects for solving the problem] In order to solve the above problem, the present invention provides a portable transmitter that returns a signal with a specific code specified by the vehicle, and a portable transmitter that returns a signal with a specific code specified from the received signals. a receiver equipped with a control unit that outputs a control signal that uniformly inverts the lock/unlock state of each door lock each time the specific code is received, and each door lock that receives the control signal; In the keyless opening/closing device for a vehicle door, the keyless opening/closing device for a vehicle door includes a door opening/closing detection switch for detecting opening/closing of the door, and the door opening/closing mechanism locks and unlocks the door. When the door opening/closing detection switch detects that any door has been opened within a predetermined time after the lock unlocking signal is sent, the control section controls to maintain the unlocked state of each door lock. When the door opening/closing detection switch detects that none of the doors are opened within a predetermined time after the door lock unlocking signal is sent from the transmitter, the door lock opening/closing mechanism is operated. The device is characterized in that it outputs a control signal that automatically locks all door locks.

Therefore, if the door lock is unlocked by the intention of the owner of the transmitter, the unlocked state will be maintained, and if the door lock is unlocked by a reason other than the intention of the owner of the transmitter, it will be automatically unlocked after a predetermined period of time. All doors will be locked.

[Examples] Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a block diagram of a keyless opening/closing device for a vehicle door according to the present invention. In the figure, a portable transmitter 10 includes a code setting circuit (not shown) that sets a code for transmission radio waves, and when a transmitting switch 12 is pressed, weak radio waves of the code set by the code setting circuit are transmitted from a transmitting antenna 14. Sent. The receiver 16 also includes a CPU 20 as a control unit, a door lock control relay 22, and a door unlock control relay 24. Determines lock/unlock, and when locking the door, door lock control relay 22
Furthermore, when the door is to be unlocked, a control signal is sent to the door unlock control relay 24. In this case, each time the transmitter switch 12 of the transmitter 10 is pressed once, the CPU 20 of the receiver 16 receives the radio waves and performs control to reverse the locked and unlocked states. In this embodiment, the receiver 16 includes four solenoids 26, 28, 30, and 32 that constitute the door lock opening/closing mechanism, and a door opening/closing detection switch 34-- which detects the actual opening/closing of the door.
1, 34-2, 34-3, and 34-4 are connected to each other, and these solenoids 26 to 32 and a door opening/closing detection switch 34 are provided for each door.

When the solenoids 26 to 32 are energized in a certain direction, a locking mechanism (not shown) is activated to lock all the doors, and when the solenoids 26 to 32 are energized in the opposite direction, they are unlocked. The detection switch 24 for detecting door opening/closing detects the actual opening/closing of each door.
When the door opens, the switch turns on. That is, when a control signal is sent from the CPU 20 to the door lock control relay 22, the relay coil 2
2a is energized and the terminals of relay contact 22b are 1 and 3.
are connected. At this time, terminals 1 and 2 of the relay contact 24b of the door unlock control relay 24 are
Since the terminals are connected, the control current flows from the power supply 36 to the CPU 20 to terminal 3 of the relay contact 22b,
1 → Each coil 26a, 28a, 30a, 32a of each solenoid 26, 28, 30, 32 → Terminals 1, 2 of relay contact 24b → GND flow through the path, and at the same time lock detection that interlocks with each coil of each solenoid 26 to 32 Switches 26b, 28b, 30b, 3
2b is turned on, all doors are locked, and the detection signal is sent to the CPU 20.

Further, when a control signal is sent from the CPU 20 to the door unlock control relay 24, the relay coil 24a is excited and terminals 1 and 3 of the relay contact 24b are connected. At this time, the terminals of the relay contact 22b of the door lock control relay 22 are 1,
2 are connected, the current flows from power source 3
6 → CPU 20 → terminals 3 and 1 of relay contact 24b
→Each coil 26a, 28 of solenoids 26 to 32
a, 30a, 32a → terminals 1, 2 of relay contact 22b → GND flows through solenoids 26 to 3
The current flows through each coil of No. 2 in the opposite direction to that when the door is locked. Therefore, an unlocking mechanism (not shown) is activated to unlock all the doors, and at the same time the lock detection switches 26b, 28b, 30b, 32 are activated.
b is also turned off, and its detection signal is sent to the CPU 20.
sent to.

By the way, in general, the transmitter switch 1 of the transmitter 10
When you press 2 to unlock the door, the next action is to open the door and enter the vehicle. However, for example, the transmission switch 12
If is pressed, the door will not open because no action is taken to enter the vehicle interior.

Here, as a feature of the present invention, when a door is unlocked by remote control operation, if any of the door open/close detection switches 34 is not opened within a certain period of time after the unlock signal is sent,
The CPU 20 sends a door lock signal to the door lock control relay 22 to automatically lock all doors.

A control flowchart by the CPU 20 at this time is shown in FIG.

First, in step 100, it is determined whether or not the door is currently unlocked based on the signals from the lock detection switches 26b to 32b.If NO, this operation is repeated at regular intervals; if YES, in step 101, It is determined whether the unlock command is generated by receiving radio waves from the transmitter 10 or not. If NO, that is, manual door unlocking, return to step 100 and YES.
In this case, in step 102, after the unlock signal is received, a preset period of time (for example,
It is determined whether any door has been opened within 30 seconds based on the signal from the door opening/closing detection switch 34. If yes, in step 103,
It is determined that the door was unlocked by the owner of the transmitter 10, and the process returns to step 100. If NO, in step 104, it is determined that the unlock signal was sent out (for example, by mistake) without the owner's intention. to decide. In this case, step 105
The CPU 20 is the door lock control relay 2.
A control signal is sent to 2 to automatically lock all doors.

Note that the transmitter and receiver are not limited to those in this embodiment, and may be of a type that transmits and receives infrared ultrasound, for example.

As explained above, according to this embodiment, if the owner of the transmitter inadvertently presses the transmitter switch,
Or, if the transmitter switch is unintentionally pressed by hitting another object and you leave the vehicle with the door unlocked, the door will automatically have a timer lock that will keep the vehicle safe. There is no fear of theft. Further, when the door is unlocked by the transmitter according to the intention of the owner of the transmitter, the door maintains the unlocked state and realizes the door lock/unlock state according to the intention of the owner of the transmitter.

[Effects of the Invention] As explained above, the present invention includes a portable transmitter that transmits radio waves with a specific code specified to a vehicle;
a receiver comprising a control unit that outputs a control signal for discriminating radio waves with the specific code from received radio waves and reversing the lock/unlock state of the door lock each time the specific code is received; and a receiver that receives the control signal. a door opening/closing mechanism that locks and unlocks the door;
By including a detection switch that detects the open/closed state of the door, even if the door is unlocked against the owner's will due to incorrect operation of the transmitter, the timer lock is automatically applied to the door, making it effective to prevent vehicle theft. can be prevented. Also,
If the door is unlocked by the transmitter at the will of the owner of the transmitter, the door can remain unlocked, which prevents the transmitter from being trapped inside the vehicle, which can easily occur when locking the door using a portable transmitter. Problems can also be resolved.

[Brief explanation of the drawing]

FIG. 1a is an explanatory diagram of a transmitter in a keyless opening/closing device for a vehicle door according to the present invention, FIG. 1b is a block diagram of its overall configuration, and FIG. 2 is an explanatory diagram of a control flowchart used in this embodiment. be. 10...Transmitter, 12...Transmission switch, 16
... Receiver, 20 ... CPU, 22 ... Door lock control relay, 24 ... Door unlock control relay, 26, 28, 30, 32 ... Solenoid, 34 ... Door opening/closing detection switch.

Claims (1)

[Scope of Claims] 1. A portable transmitter that transmits a signal of a specific code specified to the vehicle, and a portable transmitter that discriminates the signal of the specific code from among the received signals and locks each door lock each time the specific code is received. A vehicle door keyless system comprising a receiver equipped with a control unit that outputs a control signal that uniformly reverses the lock/unlock state, and a door lock opening/closing mechanism that locks and unlocks each door lock in response to the control signal. In the opening/closing device, the keyless opening/closing device for vehicle doors includes a door opening/closing detection switch that detects opening/closing of a door, and after a door lock unlocking signal is sent from the transmitter, any door is locked within a predetermined time. When the door opening/closing detection switch detects that the door lock is opened, the control section outputs a control signal to maintain the unlocked state of each door lock, and the transmitter sends a door lock unlock signal. After that, when the door opening/closing detection switch detects that none of the doors are opened within a predetermined time, it outputs a control signal to control the door lock opening/closing mechanism and automatically lock all the doors. A keyless opening/closing device for vehicle doors featuring: