JPH0368991B2 - - 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 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.

BACKGROUND TECHNOLOGY Traditionally, vehicle doors have been opened and closed, that is, locked and unlocked, by operating the lock button on the inside of the door or directly using the door key. The number of times you have to insert the door key into the door key cylinder to lock and unlock the door is limited.
This process can be repeated up to 200 times, which is extremely troublesome for the driver. For this reason, some people left their doors unlocked even when they left the vehicle, creating a risk of theft.

In order to simplify such work, various keyless opening/closing devices have been devised that transmit weak radio waves and open/close door locks based on the weak radio waves. For example, such a device is disclosed in Japanese Patent Application Laid-Open No. 54-72199. This device is provided with a control device that alternately sends out a door lock opening signal and a door lock closing signal each time it receives a radio wave signal from a transmitter. Therefore, if the door lock is currently in the closed state and the next signal sent is a close signal, the control device will only send the close signal even if it receives radio waves from the transmitter, and the door lock will be closed. The lock remains closed and the transmitter must be operated again to unlock the door.

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, and to solve the problem of opening and closing door locks by key operation. To provide a keyless opening/closing device for a vehicle door lock, which eliminates the troubles of the above and further allows the door lock to be reliably opened/closed with a single transmitter operation.

Configuration of the Present Invention In order to achieve the above object, the present invention includes: a portable transmitter that transmits a radio wave with an identification code specified for a vehicle; a receiving means that discriminates the radio wave with the identification code from among the received radio waves; An opening/closing determination means for determining whether the door lock is open or closed, and a code determination signal from the receiving means.If the opening/closing determination means determines that the door lock is open, the door lock is closed. It is characterized by comprising an opening/closing control means that outputs a control signal to open the door when it is determined that the door lock is open, and an opening/closing mechanism that opens and closes the door lock in response to the control means.

Embodiments Hereinafter, preferred embodiments of the present invention will be described based on the drawings. FIG. 1 is a plan view of a vehicle 16 showing an identification area 14 of a receiver 12 installed near the driver's door so that it can receive radio waves from a portable transmitter 10.

FIG. 2 is a block diagram showing one embodiment of the apparatus of the present invention. In FIG. 2, the transmitter 10 has an identification code setting circuit 18 for setting an identification code of the transmitted radio waves, and is connected to a transmitting antenna 20 so as to transmit radio waves with the identification code set by the identification code setting circuit 18. It consists of a transmitting circuit 22 and a transmitting switch 24 that operates this transmitting circuit 22.
Further, the receiver 12 is connected to a receiving antenna 26, and includes a receiving circuit 28 and an identification code discriminating circuit 30, which are receiving means for discriminating an identification code from received radio waves, and a lock/unlock discriminating circuit for discriminating whether a door lock is opened or closed. 32, and a door lock/unlock control circuit 34 which receives discrimination signals from both discrimination circuits 30 and 32 and controls a door lock system 36. The door lock system 36 opens and closes the door lock using an electromagnetic mechanism that responds to a control signal output from the receiver 12, and the receiver 12 separately outputs a door lock open signal 100 and a door lock close signal 102. Ru. In the case of the illustrated example, the door lock opening/closing member is operated by an electromagnetic mechanism responsive to each output to open/close the door lock. Further, when either the door lock opening signal 100 or the closing signal 102, for example, the closing signal 102, is output from the receiver 12, an electromagnetic mechanism responsive to the output causes the door lock opening/closing member to resist the biasing spring. Any configuration is possible, such as configuring the door lock opening/closing member to be operated by the spring force of the biasing spring to open the door when there is no output, that is, to open the door lock.

The embodiment of the present invention has the above configuration, and its operation will be explained below. When the transmitter 10 closes the transmission switch 24, the transmitter 10 transmits a radio wave having a dedicated identification code specified for the vehicle 16 from the transmission antenna 20. The receiver 12 uses an identification code discriminating circuit 30 to discriminate a dedicated identification code specified for the vehicle in which the receiver 12 is mounted from among the received radio waves received by the receiving antenna 26, and when the identified identification code is received. supplies a code discrimination signal to the door lock/unlock control circuit 34. door lock
When the unlock control circuit 34 receives the code discrimination signal and receives the door lock close signal from the lock/unlock discrimination circuit 32, it sends an open signal to the door lock system 36, which is a control signal to open the door lock. 100 and, on the other hand, when receiving a door lock open signal, it supplies the door lock system 36 with a close signal 102, which is a control signal for unlocking the door.

Therefore, if the receiver 12 operates the transmit switch 24 of the transmitter 10 within the identification area 14 where the receiver 12 has a reception function,
By turning ON and OFF, the door lock system 36 can be activated by the control signal from the receiver 12 to automatically open and close the door lock.

Moreover, at this time, the lock/unlock discrimination circuit 3
2, the current state of the door lock is determined and the door lock is controlled to change this current state, so that the door lock can be reliably opened and closed with one operation of the transmitter 10.

In other words, when the operator operates the transmitter 10, he is trying to change the current state of the door lock, and by performing the control described above, the door lock can be adjusted to reflect the operator's intention. It can be manipulated.

Effects of the Present Invention As described above in detail, according to the present invention, when a receiver mounted on a vehicle receives a radio wave with an identification code specified for the vehicle, a control signal outputted is used to control the door opening. Since the system activates the lock system to open and close the door, there is no need for the troublesome work of opening and closing the door when using a key. It has extremely high practical effects. Furthermore, since the door lock can be reliably opened and closed with one operation of the transmitter, the door lock can be controlled according to the operator's will.

[Brief explanation of drawings]

FIG. 1 is a plan view of a vehicle showing the identification area of the receiver, and FIG. 2 is a block diagram showing an embodiment of the apparatus of the present invention. DESCRIPTION OF SYMBOLS 10... Transmitter, 12... Receiver, 14... Identification area, 16... Vehicle, 28... Receiving circuit (receiving means), 30... Identification code discrimination circuit (receiving means), 32... Lock... Unlock discrimination circuit (open/close discrimination means), 34...door lock/unlock control circuit (open/close control means), 36...door lock system (open/close mechanism).

Claims (1)

[Claims] 1. A portable transmitter that transmits a radio wave with an identification code specified for a vehicle, a receiving device that determines the radio wave of the identification code from among the received radio waves, an open/close determination device that determines whether the door lock is open or closed, and the Based on the code discrimination signal from the receiving means, if the opening/closing discrimination means determines that the door lock is open, the door is closed; if the door lock is determined to be closed, the door is opened;
1. A keyless opening/closing device for a vehicle door lock, comprising: an opening/closing control means for outputting a control signal; and an opening/closing mechanism for opening/closing the door lock in response to the control signal.