JPS6033988A - Keyless opening and closing apparatus of car door lock - 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 a keyless opening/closing device for a vehicle door lock, particularly a keyless opening/closing device for a vehicle door lock that automatically opens/closes (unlocks or locks) a door lock using weak radio waves. It is related to the device.

BACKGROUND TECHNOLOGY Traditionally, vehicle doors have been opened and closed, that is, locked and unlocked, either by operating the lock button on the inside of the door or directly using the door key. The driver must insert the door key into the door key cylinder to lock and unlock the door 200 times each time, which is a very troublesome task for the driver. For this reason, some people leave their doors unlocked even when they leave the vehicle, leading to the risk of theft.

Purpose of the present invention The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to enable door locks to be opened and closed automatically using weak radio waves, so that door locks can be opened and closed by key operation. To provide a keyless opening/closing device for a vehicle door lock that eliminates the troubles of.

Structure of the Present Invention In order to achieve the above object, the present invention includes a portable transmitter that transmits a radio wave of a specific code P specified to a vehicle, and a portable transmitter that discriminates the radio wave of the specific code from among the received radio waves and transmits the received radio wave. a receiver that outputs a control signal to open the door lock when the electric field strength is greater than a preset level and close the door lock when it is smaller; and a door that opens and closes the door lock in response to the control signal. It is characterized by consisting of a lock opening/closing mechanism.

Embodiments Hereinafter, preferred embodiments of the present invention will be described based on the drawings. FIG. 1 shows the identification area 14 of the receiver 12 installed near the driver's door so that it can receive radio waves from the transmitter 10.
FIG. 2 is a plan view of the vehicle 16 showing the distance from the transmitter 10 to the receiver 12 (hereinafter referred to as the transmitter-receiver distance).
It is a 4G characteristic diagram in which the horizontal axis is the field strength of received radio waves and the vertical axis is the electric field strength of the received radio wave.

FIG. 3 is a block diagram showing the configuration of the transmitter 10 and receiver 12 described above. In FIG. 3, the transmitter 10 includes a code setting circuit 18 for setting the code of the radio wave to be transmitted, and a transmitting circuit 22 connected to the transmitting antenna 20 so as to transmit the radio wave of code P set by the code setting circuit 18. Consisting of The receiver 12 also includes a receiving circuit 26 connected to a receiving antenna 24, a discriminating circuit 28 for discriminating the electric field strength level and code of radio waves received from the receiving circuit 26, and a discriminating circuit 2.
8, and a control circuit 30 that controls the door lock opening/closing mechanism 32 based on the output signal from 8. Above door lock opening/closing mechanism 3
2 opens and closes the door lock using an electromagnetic mechanism (not shown) that responds to a control signal output from the receiver 12, and receives the door lock opening signal ioo and the closing signal 102 from the receiver 12.
In the illustrated example in which each output is separately output, an electromagnetic mechanism responsive to each output is configured to operate a door lock opening/closing member (not shown) to open and close the door lock. Further, the door lock open signal 100 or door lock signal 102 is sent from the receiver 12.
For example, when the closing signal 102 is output, the door lock opening/closing member is operated against the biasing spring by the electromagnetic mechanism responsive to the output to close the door lock. When opening the door, the structure may be arbitrary, such as configuring the door lock opening/closing member to be operated by the spring force of the biasing spring to open the door.

The embodiment of the present invention has the above configuration, and its operation will be explained below. The transmitter 10 transmits radio waves with a dedicated identification code specified for the vehicle 16 from the transmitting antenna 20. The receiver 12 uses a discriminating circuit 28 to determine from the received radio waves received by the receiving antenna 24 the dedicated identification code specified for the vehicle 16 in which the receiver is installed and the electric field strength of the received radio waves. When the electric field strength of the separate code is equal to or greater than a preset value of 4L, a door lock opening signal 100 is supplied from the control circuit 30 to the door lock opening/closing mechanism 32 to open or unlock the door. On the other hand, when the level is below the set level L, the door lock closing signal 102 is supplied to the door lock opening/closing mechanism 32 to close the door lock.

Therefore, when a person in possession of the transmitter 10, for example a driver, moves away from the vehicle 16 and the transmitter/receiver distance R exceeds the identification area d, the field strength of the received radio waves becomes less than the set level L and the door locks as described above. will be closed automatically. Moreover, contrary to the above, when the person in possession of the transmitter 10 approaches the vehicle 16 and enters the occupational area d, the field strength of the received radio waves exceeds the set level L and the door lock is automatically opened. It will be done.

Effects of the Present Invention As detailed above, according to the present invention, when the person carrying the transmitter moves away from the vehicle, the door locks will automatically close, and when the person approaches the vehicle, the 27 door locks will automatically open. This eliminates the troublesome work of opening and closing door locks, as would be the case when using a key, and is highly practical when applied to delivery vehicles and the like where doors are frequently opened and closed.

[Brief explanation of drawings]

Figure 1 is a plan view of the vehicle showing the identification area of the receiver; Figure 2 is a characteristic diagram showing the relationship between transmitter-receiver distance and electric field strength. FIG. 3 is a block diagram showing an embodiment of the device of the present invention. 10... transmitter, 12--Receiver, 14... Seibetsu area, 16...Vehicle. Agent: Patent Attorney Yoshi 1) Kenji (1 other person) Figure 2 d 11 -) Distance R

Claims (1)

[Claims] (1) A portable transmitter that transmits radio waves with a specific code specified by the vehicle, and a setting transmitter that distinguishes radio waves with the specific code from among the received radio waves and has a preset field strength of the received radio waves. A vehicle characterized by comprising: a receiver that outputs a control signal to open the door lock when the value is greater than 1, and close the door lock when the value is smaller; and a door lock opening/closing mechanism that opens and closes the door lock in response to the control signal. Keyless door lock opening/closing device.