JPH0476174A - Keyless entry system - Google Patents

Abstract

PURPOSE:To enable it to improve the extent of operability for a portable transmitter by continuously transmitting an unlocking signal for the specified time longer than the pressing time of a door unlocking switch when this pressing time is longer than the specified one. CONSTITUTION:There is provided a keyless entry system which operates a door unlocking switch 2 installed in a portable transmitter 1, transmitting an unlocking signal, and it is received by a receiving means 10 of a keyless entry device 9 installed in a vehicle and release a door lock. A comparison means, comparing the pressing time of the door unlocking switch 2 with a first specified time, is installed in this system. When the pressing time is longer than the first specified time, the unlocking signal is continuously transmitted as long as a second specified time longer than the first specified time by a continuous transmitting means. With this constitution, suchlike complexity that it must be operated after coming nearer to the range where the transmitting signal is reached to the vehicle is thus eliminable.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a keyless entry system that unlocks a door by remote control from a portable transmitter.

(Prior Art) As a conventional keyless entry system of the above-mentioned example, there is one described in, for example, Japanese Patent Application Laid-Open No. 63-31847.

In other words, when the door unlock switch provided on the portable transmitter (remote control key) is operated, the light emitting element emits an optical signal, which is received by the light receiving element of the vehicle's keyless entry device, and the key code ( This is a keyless entry system configured to unlock the door when the identification code (identification code) matches.

Although this conventional device has the advantage of being able to remotely unlock the door, since the light signal is emitted from the portable transmitter for a certain period of time, for example, 1 to 2 seconds, the light signal The operator had to get close enough to the vehicle to operate the door unlock switch, which was cumbersome.

(Purpose of the Invention) This invention aims to improve the operability of a portable transmitter by continuously transmitting a door unlock signal for a long period of time by a predetermined operation, and to improve the operability of a portable transmitter by continuously transmitting a door unlock signal for a long period of time by a predetermined operation. The purpose is to provide a keyless entry system that can eliminate the complexity of operation.

(Structure of the Invention) This invention unlocks the door by receiving an unlock signal transmitted by operating a door unlock switch provided in a portable transmitter with a receiving means of a keyless entry device provided in a vehicle. A keyless entry system comprising: comparing means for comparing the pressing time of the door unlock switch with a first predetermined time; and based on an output of the comparing means, when the pressing time is equal to or longer than the first predetermined time, a first The present invention is characterized in that the keyless entry system includes continuous transmission means that continuously transmits the unlock signal for a second predetermined time period that is longer than the predetermined time period.

(Effects of the Invention) According to the present invention, when the driver presses the door unlock switch of the portable transmitter, the above-mentioned comparing means compares the pressing time of the switch with the first predetermined time; When the pressing time is longer than the first predetermined time based on the output of , the above-mentioned continuous transmitting means continuously transmits the above-mentioned unlock signal for a second predetermined time set as a long time with respect to the first predetermined time.

As a result, the door unlock signal is continuously transmitted from the above-mentioned portable transmitter for a long period of time (for example, 60 seconds), which eliminates the conventional method of operating the door unlock signal by approaching the vehicle within the reach of the transmitter. This has the effect of improving the operability of the portable transmitter.

(Example) An embodiment of the present invention will be described in detail below based on the drawings.

The drawing shows a keyless entry system, and in FIG. 1, a portable transmitter 1 is connected to a door unlock switch 2 and a
The CPU 3 drives and controls the timer circuit 4 and the transmitter circuit 5 according to the program stored in the ROM 7 based on the signal from the door unlock switch 2. , and the RAM 8 stores necessary data such as the identification code of the vehicle, first predetermined time tl data, and second predetermined time t2 data.

Here, the above-mentioned CPU 3 sets the pressing time t of the door unlock switch 2 to the above-mentioned first predetermined time t, for example, from 2 to 3.
sec (second step 32 in FIG. 2)
), and based on the output of this comparison means, the above-mentioned pressing time t is the first
When the predetermined time t1 or more, the second predetermined time t set as a long time with respect to the first predetermined time t1 is, for example, 60 seconds.
During ec, the above-mentioned transmitting circuit 5 is continuously driven to send an unlock signal (radio wave a from the transmitting antenna 6 in this embodiment).
Continuous transmission means (3rd step 3 in Figure 2) that continuously transmits
(see 3).

Further, the above-mentioned timer circuit 4 is connected to the door unlock switch 2.
The pressing time t is measured.

On the other hand, the keyless entry device 9 provided on the vehicle side includes a receiving antenna 10 and a receiving circuit 11 that receive the above-mentioned radio wave a.

Based on the input from the receiving circuit 11, the CPU 2
The door lock driver (door lock drive circuit) 14, the first actuator 15, the second actuator 16, the third actuator 17, and the fourth actuator 18 are driven and controlled according to the program stored in the OM 13, and the RA
The MI 9 stores necessary data such as the identification code of the vehicle in question.

Further, the above-mentioned keyless entry device 9 includes a manual operation switch 20, and in addition to the unlock signal from the above-mentioned portable transmitter 1, this manual operation switch 20
The system is configured to unlock the door even when the button is turned on.

Here, the above-mentioned CPU 12 is a verification means (see second step 42 in FIG. 3) that determines and verifies whether the identification code transmitted from the transmitting antenna 6 matches the identification code of the vehicle stored in the RAM 19. Also serves as

Further, the first actuator 15 described above drives the door lock mechanism on the front right side of the vehicle, and the second actuator 1
6 drives the front left door lock mechanism, the third actuator 17 drives the rear right door lock mechanism,
The fourth actuator 18 drives the rear left door lock mechanism.

In addition, in this example, it is applied to a 4-door type, but
Of course, it may be applied to a two-door type.

The operation of the keyless entry system configured as described above will be explained with reference to the flowcharts shown in FIGS. 2 and 3.

First, transmission control will be described with reference to the flowchart in FIG.

In the first step 31, the CPU 3 on the side of the portable transmitter 1 determines whether or not the door unlock switch 2 has been turned on, and only when it is turned on, proceeds to the next second step 32.

In the second step 32 described above, the CPU 3 calculates the pressing time of the door unlock switch 2 (and the RA
Compare the first predetermined time t1 read from M8 and find that t≧t
1, the process moves to the next third step 33, while t<
At the time of tl, the process moves to another fourth step 34.

In the third step 33 described above, the CPU 3 executes the second predetermined time t.
2 and the identification code are read from RAM 8, and the above-mentioned second
The transmission circuit 5 is continuously driven and controlled for a predetermined time t, for example, 606 ec, and the door unlock signal and identification code are continuously transmitted from the transmission antenna 6 to the reception antenna 10 of the keyless entry device 9 as radio waves a.

On the other hand, in the fourth step 34 described above, the CPU 3
The transmission circuit 5 is driven and controlled for the pressing time t of the door unlock switch 2 described above, and the door unlock signal and the identification code are sent to the reception antenna 1 of the keyless entry device 9 as radio waves a from the transmission antenna 6.
Send to 0.

Next, unlock control will be described with reference to the flowchart in FIG.

In the first step 41, the CP on the keyless entry device 9 side
U12 determines whether or not an unlock signal has been received based on the output of the receiving circuit 11, and moves to the next second step 42 only when the unlock signal is received.

In this second step 42, the CPU 12 controls the receiving circuit 11.
Checks and compares whether or not the identification code received by the RAM 19 matches the identification code successively received from the RAM 19, and only when they match,
The process moves to the next third step 43.

In this third step 43, the CPU 12 drives and controls each of the actuators 15 to 18 in the unlocking direction via the door lock driver 14 to release the door lock via the door lock mechanism.

When the occupant presses the door unlock switch 2 of the portable transmitter 1 in this way, the above-mentioned comparison means (see second step 32 in FIG. 2) compares the pressing time t of the switch 2 and the first predetermined time t1. and based on the output of this comparison means, when the pressing time t is longer than the first predetermined time t1, that is, t
When ≧tl, the above-mentioned continuous transmission means (see third step 33 in FIG.
sec), the above-mentioned unlock signal is continuously transmitted as radio wave a for a second predetermined time t2 (for example, 60 sec), which is set as a long time.

As a result, the above-mentioned portable transmitter 1 continuously transmits the door unlock signal for a long period of time, which eliminates the complication of operating the vehicle by approaching the vehicle within the range where the transmitter signal can reach. This has the effect of improving the operability of the portable transmitter 1.

In the correspondence between the configuration of the present invention and the above-described embodiments, the receiving means of the present invention corresponds to the receiving antenna 10 and the receiving circuit 11 of the embodiment, and similarly, the comparing means corresponds to the second step controlled by the CPU 3. Corresponding to 32, the continuous transmission means is a third step 33 controlled by the CPU 3.
However, the present invention is not limited to the configuration of the above-described embodiment.

For example, the signal transmission medium from the above-described portable transmitter 1 to the keyless entry device 9 may be an infrared ray, optical transmission, or laser communication medium instead of the radio wave a of the embodiment.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a block diagram showing a keyless entry system, FIG. 2 is a flow chart showing transmission control, and FIG. 3 is a flow chart showing unlock control. 1... Portable transmitter 2... Door unlock switch 9... Keyless entry device 10... Receiving antenna (receiving means) 11... Receiving circuit (receiving means) 32... Second step (Comparison means) 33...Third step (continuous transmission means) t...Press time tl...First predetermined time

Claims (1)

[Claims] (1) A keyless entry system that unlocks the door by receiving an unlock signal sent by operating a door unlock switch installed on a portable transmitter using a receiving means of a keyless entry device installed in the vehicle. a comparison means for comparing the pressing time of the door unlock switch with a first predetermined time; and based on the output of the comparing means, when the pressing time is longer than the first predetermined time, a second predetermined time longer than the first predetermined time; A keyless entry system comprising continuous transmission means for continuously transmitting an unlock signal for a predetermined period of time.