JPS61211468A - Automatic locking apparatus of car door - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic vehicle door unlocking device that automatically unlocks the vehicle door when a portable transmitter approaches the vehicle door.

[Prior Art] This type of device, as seen in Japanese Patent Application Laid-Open No. 57-108373, sends a control signal that turns the locking/unlocking mechanism of a vehicle door into an unlocked state when a portable transmitter approaches a receiving device. What happens is known.

[Problems to be Solved by the Invention] In the known device, even if a person mistakenly carries a transmitter in an activated state and approaches a vehicle and then simply passes by, the receiver device receives the control signal. Since this occurs and the lock/unlock mechanism is placed in the unlocked state, there is a risk that the lock/unlock mechanism may be left in the unlocked state even if the person leaves the vehicle.

An object of the present invention is to provide an automatic vehicle door unlocking device that eliminates such problems.

[Means for Solving the Problems] Therefore, the present invention provides a portable device comprising a signal generating means for repeatedly generating an unlocking request signal in a predetermined code format, and a transmitting means for transmitting this signal as a wireless signal. In response to the transmitting device, the in-vehicle control device includes receiving means for receiving the wireless signal and periodically and repeatedly converting it into an electrical signal, and repeatedly extracting the unlocking request signal from the received electrical signal and transmitting the extracted unlocking request signal. A determining means for repeatedly determining whether or not the code format of the request signal matches a preset one, and generating a first signal when the determination result indicates a match, and generating a second signal when indicating a mismatch. a control signal generating means for setting a vehicle door locking/unlocking mechanism to an unlocked state in response to generation of the first signal, and locking the vehicle door locking/unlocking mechanism in response to generation of the second signal; The device is characterized in that it is configured to include a locking/unlocking means for setting the state.

[Operation and Effect] In this configuration, when the receiving means, the discriminating means, and the control signal generating means are in the operating state, the discriminating means repeatedly extracts the unlocking request signal from the received electric signal, and also outputs the control signal. Generating means are in a state capable of generating the first signal or the second signal. In such a state, when the portable transmitting device approaches the receivable area of the receiving means and the determining means determines that the unlocking request signals match, the control signal generating means applies a first signal to the locking/unlocking mechanism. to set the vehicle door to the unlocked state. If the portable transmitting device is in the receivable area and the determining means repeatedly determines that the unlocking request signals match, the vehicle door continues to be set to the unlocked state. However, if the portable transmitting device moves away from the receivable area while remaining in the activated state, the determining means determines that the unlocking request signals do not match, and the control signal generating means
A signal is given to the lock/unlock mechanism to lock the vehicle door again.

As described above, according to the device of the present invention, after normal usage, the locking/unlocking mechanism of the vehicle door can be set to the unlocked state as the portable transmitting device approaches, and if for some reason When the portable transmitting device approaches the vehicle and then moves away from the vehicle, the locking/unlocking mechanism is set to the locked state again due to the discriminating means determining a discrepancy. This prevents the device from being left in the same state.

Furthermore, since the device of the present invention is configured to determine whether or not the unlocking request signals in the determining means match, and to repeatedly perform the determination, similar unlocking request signals from different portable transmitting devices can be discriminated. Even if it is mistakenly determined that they match temporarily, the locking/unlocking mechanism will not remain in the unlocked state unless the error continues.

[Embodiment] In FIG. 1 showing the overall configuration of an embodiment of the present invention, a portable transmitting device 1 is made in a size that can be placed in a passenger's pocket. On the other hand, the on-vehicle control device includes a receiving antenna 2, a control circuit box 3, and a lock/unlock mechanism 4.

FIG. 2 shows the electric circuit of the portable transmitter. The portable transmitter 1 includes a code signal generation circuit 13 that generates a preset serial code signal. When the manual switch 12 is turned on, the signal generating circuit 13 is supplied with power from the dry cell battery 11, repeatedly generates the code signal, and applies it to the transmitting coil 14.

In the code signal generation circuit 13, the reference signal generation circuit 1
31 is a frequency dividing circuit 131B which divides the oscillation signal of the oscillation circuit 131A.
The reference signal frequency-divided by is applied to the serial code generation circuit 132. In addition, in the drawings, it is represented by a block “TC
Integrated circuits labeled ○○OO'' are sold by Toshiba Corporation under the same label.

The serial code generation circuit 132 is the reference signal generation circuit 13
The frequency dividing signal obtained by further dividing the reference signal received from 1 by the frequency dividing circuit 132A is sent to the decade counter divider 13.
2B, and its parallel output signal is taken out via the code setting switch 132C. The code setting switch 132C includes eight switches SWI so that each of the portable transmitting devices can be set independently and in advance.
~The open/close state of SW8 is fixed in advance. The output signal of the code setting switch 132C is again combined into a serial signal by the logic circuit 132D, and then the modulation circuit 133
is output to.

The modulation circuit 133 configured with a NOR gate modulates the serial signal from the serial code generation circuit 132 with a modulation signal of a sufficiently high frequency and applies it to the drive circuit 134, and the drive circuit 134 drives the transmitting coil according to the modulation signal. do.

As can be understood from the configuration described above, in the portable transmitting device 1, when the manual switch 12 is turned on, the reference signal generation/main circuit 131 starts generating the reference signal, and the code signal generation circuit 132 starts generating the code setting switch 132C. A serial signal, for example, the signal shown in FIG. 3(a), is repeatedly generated according to the open/closed state of the switch.

This serial signal is transmitted to the modulation circuit 133 as shown in FIG.
The signal is modulated into the signal shown in FIG. 2 and continues to be repeatedly transmitted from the transmitting coil 14.

FIG. 4 shows the electrical circuit of the on-vehicle control device. The in-vehicle control device has a detection circuit 31 connected to the receiving antenna 2.
has. The detection circuit 31 is composed of an operational amplifier, a resistor, and a capacitor, and produces a demodulated signal reproducing the serial signal at its output terminal 31A. When the transmission signal of the portable transmitter 1 is received in a normal state, the output terminal 3
The serial signal generated at 1A has the same form fi as that generated by the code signal generation circuit 132 of the portable transmitter 1 (Fig.
8).

A serial signal generated by the detection circuit 31 is applied to a code determination circuit 32. The code determination circuit 32 includes the oscillation circuit 3
A decade counter receives a reference signal oscillated at 2A and divided by a frequency dividing circuit 32B via a tuning circuit 32G.
It has a divider 32D. The serial signal is passed through the latch circuit 32F via the gate 32E controlled by the output signal of the decade counter divider 32D.
is repeatedly latched as a parallel signal. Latch circuit 3
The output terminal of 2F is connected to the matching logic circuit 32G,
The verification logic circuit 32G further includes a code setting switch 33.
is connected to.

The code setting switch 33 is made up of eight switches 5WII to 5W18 that are fixed in a preset open/closed state similarly to the code setting switch 132C of the morphological transmitter 1. The matching logic circuit 32G compares the parallel output signal of the latch circuit 32F and the setting signal generated by the code setting switch 32, and produces a low level output signal when the two match.

Therefore, if the repeatedly received serial signal matches the setting signal, the verification logic circuit 32G repeatedly generates a low level signal on line m.

Line m is connected to one input end of control logic circuit 34, and the other input end of control logic circuit 34 is connected to locking/unlocking mechanism 4 via line p. The output terminal of the control logic circuit 34 is connected to a drive circuit 35, and the lock/unlock mechanism 4 is set to a locked state or an unlocked state via the drive circuit 35.

In the locking/unlocking mechanism 4, the unlocking relay 41 is connected to the drive circuit 35.
When the unlocking transistor 35U is conductive, the driving solenoid 43 is energized in one direction so as to bring the locking/unlocking member 4A into the unlocked state. Further, the locking relay 42 is energized when the locking transistor 35L of the drive circuit 35 is conductive.

To lock the locking/unlocking member 4A, the driving solenoid 43 is urged in the other direction. 7 is also configured so that the locking and unlocking states can be reversed.

The position of the locking/unlocking member 4, that is, whether it is in a locked state or an unlocked state, is detected by a detection switch 43a that responds to the open/closed state. The line p connecting the detection switch 43a and the control logic circuit 34 detects a low level when the locking/unlocking member 4A is in an unlocked state, and a high level when the locking/unlocking member 4A is in a locked state.

The power supply circuit 36 supplies constant voltage power to each circuit of the on-vehicle control device when the main switch 6 is turned on.

The control logic circuit 34 includes four monostable multivibrators 3
41-344 and orgate 345, Antogame-1-34
6,347 and other logic elements. In explaining the operation of the control logic circuit 34, reference will be made to FIGS. 5 and 6, ie, time charts showing changes in voltage levels at each point (each line).

This in-vehicle control device is in an operating state, and the portable transmitter 1
The serial signal from the device is repeatedly received, and if at some point it is determined that the configuration code signals of both devices match, the line m
voltage level becomes low level. In response, the first monostable multi-bi break 341 is activated, for example in FIG.
), a high-level time signal t1 with a constant time width is generated. When the lock/unlock member 4A is in the locked state and a high level signal is generated on the line p, the AND gate 346 applies a high level signal to the unlocking transistor 35U via the line q.

In response, the unlocking transistor 35U becomes conductive and energizes the unlocking relay 41, which energizes the solenoid 43 and operates the locking/unlocking member 4A to the unlocked state. Since the detection switch 43a responds to this by generating a low level signal on the line p, the AND gate 346 stops generating the high level signal to the unlocking transistor 35U.

The second monostable multi-bi break 342 generates a time signal t2 having a predetermined time width as shown in FIG. 5(5) in response to the generation of the low level signal on the line p. The third monostable multi-by-break 343 responds to the longer of the time signal t2 and the low level signal of the line m via the OR gate 345 to generate a time signal with a constant time width as shown in FIG. 5(7). t3
occurs.

When the time signal t3 disappears, the fourth monostable multi-bi break 344 generates a time signal t4 having a constant time width and applies it to the AND gate 347. When the AND gate 347 receives the time signal t4 when the line p is at a low level indicating the unlocked state, it applies a high level signal to the locking transistor 35L via the line r. The locking transistor 35L receives this high level signal and becomes conductive, energizing the locking relay 42 of the locking/unlocking mechanism 4, thereby energizing the solenoid 43 in the locking direction and operating the locking/unlocking mechanism 4A in the locked state. When locking is completed and the line p changes to high level, the AND gate 347 changes the line r to low level and shuts off the locking transistor 35L.

The above operation means the following. If the verification match continues, the low level of the line m also continues, so the time until the third monostable multi-bi break 343 generates the time signal t3 is reserved, and the locking transistor 35L
The time required for the system to operate is also reserved. Therefore, while the portable transmitting device 1 is continuously in the vicinity of the vehicle, once the locking/unlocking member 4A is once unlocked by the unlocking operation of the solenoid 43, it may be returned to the locked state. Also, it will not be unlocked again.

FIG. 6 shows a case where this in-vehicle control device is in an operating state, and when the manual operating mechanism 7 applies an operating force in the unlocking direction to the locking/unlocking mechanism 4A while the locking/unlocking mechanism 4 is in the locked state. It shows the operation. In such a case, since the setting code signals of both devices do not match, the line m is in a high level state and a high level signal for unlocking is not generated from the AND gate 346 to the line q.

In this state, a low level signal indicating unlocking is generated on the line p, so the second monostable multi-by-break 3
45 generates a time signal t2.

When the time signal t2 disappears, the output signal n of the OR gate 345 is also inverted to low level, and based on this, the third monostable multi-by break 343 emits the time signal t3, and when it disappears, the fourth monostable multi-by break 343 starts generating the time signal t3. 344 generates a time signal t4. and gate 347
When receiving this time signal t4, it applies a high level signal to the locking transistor 35L via the line r.

Locking transistor 35L receives this high level signal and energizes locking relay 42, and based on this, solenoid 4
3 operates the lock/unlock mechanism 4A to the locked state. Thus, as long as this in-vehicle control device is in the operating state and the portable transmitting device 1 is in the stopped state, the locking/unlocking member 4 can be manually operated.
Even if A is in the unlocked state, the time signal t2 and the time signal t
After the predetermined time width of 3 has elapsed, the locking/unlocking member 4
A is set to a locked state.

In carrying out the present invention, the portable transmitting device 1 described above is configured to transmit a magnetic signal, and the vehicle-mounted control device is configured to receive the magnetic signal. Ultrasonic waves, radio waves, light (laser light may also be used), and heat may be used.

Further, the control circuit 3 constituting the in-vehicle control device may be configured using a microcomputer that realizes necessary functions by executing a software control program.

In the in-vehicle control device, the main switch 6 is in the car.

It may also be provided at a predetermined position in the interior of the vehicle and thrown in when the portable transmitter 1 is taken out of the vehicle.

[Brief explanation of the drawing]

In the accompanying drawings showing one embodiment of the present invention, FIG. 1 is a schematic diagram showing the arrangement of a portable transmitter and an on-vehicle control device, and FIG.
The figure is an electric circuit diagram of the portable transmitter, Figure 3 is an explanation diagram of the operation of the portable transmitter, Figure 4 is an electric circuit diagram of the on-vehicle control device, and Figures 5 and 6 are explanations of the operation of the on-vehicle control device. It is a diagram. DESCRIPTION OF SYMBOLS 1... Portable transmitting device, 13... Code signal generation circuit forming a signal generating means, 132... Code setting switch, 14... Transmitting coil forming a transmitting means, 2.31.
...Receiving antenna and detection circuit forming the receiving means, 3...
Control circuit (box), 32. 34... Code determination circuit and control logic circuit forming control signal generating means, 33... Code setting switch, 35... Drive circuit, 4... Locking/unlocking mechanism, 4A ... Locking/unlocking mechanism, 7... Manual operation mechanism.

Claims (2)

[Claims] (1) A portable transmitting device comprising a signal generating means that repeatedly generates an unlock request signal in a predetermined code format, and a transmitting means that transmits this signal as a wireless signal; a receiving means that repeatedly converts the unlocking request signal into an electrical signal; and repeatedly extracting the unlocking request signal from the received electrical signal, and repeatedly determining whether the code format of the extracted unlocking request signal matches a preset one. control signal generating means for generating a first signal when the determination result indicates a match and generating a second signal when the result of the discrimination indicates a mismatch; and a locking/unlocking means for setting the locking/unlocking mechanism of the vehicle door to the unlocked state and setting the locking/unlocking mechanism of the vehicle door to the locked state in response to generation of the second signal. Automatic door unlocking device. (2) The control signal generating means includes means for responding to the locked and unlocked states of the locking/unlocking mechanism of the vehicle door, and generates the second signal in the locked state and in the unlocked state. 2. The automatic vehicle door unlocking device according to claim 1, further comprising a delay circuit for limiting generation of said first signal.