JP4905026B2 - Keyless entry system - Google Patents

Description

  The present invention relates to a keyless entry system, and more particularly to a keyless entry system that controls a plurality of functions.

  In recent years, keyless entry systems used for locking and unlocking vehicle doors and the like are becoming popular. This system is very convenient because it can lock and unlock vehicle doors without using mechanical keys. In order to further improve convenience, multifunctional functions such as opening and closing of sliding doors and opening and closing of power windows are required.

  In such a conventional keyless entry system, an example in which two functions of locking and unlocking a vehicle door and opening and closing of a slide door are controlled will be described.

  The portable device at that time has two operation switches, that is, a first operation switch for door locking / unlocking and a second operation switch for opening / closing the slide door, and further detects which operation switch is turned on. A portable control unit that selects an operation signal and generates a transmission signal by adding an ID to the operation signal, and a transmission antenna that transmits the transmission signal transmitted from the portable control unit by radio waves.

  On the other hand, the main unit mounted on the vehicle is arranged in a door knob or the like to receive a radio transmission signal, and a main body control unit that decodes the transmission signal received by the reception antenna and controls a predetermined drive circuit And.

  The keyless entry system is composed of the portable device and the main body.

  In the above configuration, for example, when the portable control unit detects that the first operation switch is turned on by the operator, the portable control unit selects the first operation signal and transmits a transmission signal in which an ID stored in advance is added to this signal. Transmit via antenna.

  The main unit, on the other hand, deciphers the ID contained in the transmission signal from the portable device received by the main body control unit via the receiving antenna, compares it with the ID stored in advance, and drives the door lock when they match. The circuit is controlled so that the unlocking operation is performed when the door lock actuator connected to the outside is locked, and the locking operation is performed when the door locking actuator is unlocked.

  In addition, when the portable control unit detects that the second operation switch is turned on, the portable control unit operates in the same manner as described above, and the main body unit opens and closes the slide door opening and closing actuator connected to the outside.

  Here, the signal reach distance between the portable device and the main unit of this system is generally set to about 20 m. Furthermore, since radio waves are used for transmission and reception, operation is possible even if there is a shield such as another vehicle between the operator and the vehicle.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP-A-60-92581

  However, in the above conventional keyless entry system, it is necessary to provide an operation switch for each function, and as the number of functions increases, the number of operation switches increases, resulting in an increase in the size and cost of the portable device. It was.

  In addition, when operating the portable device in a pocket or the like, there is a concern that a plurality of operation switches may be mistakenly operated.

  The present invention solves such a conventional problem, and an object of the present invention is to provide a keyless entry system including a portable device that can be miniaturized and inexpensive while realizing multi-function.

  In order to achieve the above object, a keyless entry system of the present invention has the following configuration.

The invention according to claim 1 of the present invention includes an operation switch, a portable control unit that selects an operation signal in accordance with an operation on the operation switch and adds an ID to the operation signal to generate a transmission signal; A main body including a portable device including a transmission unit that outputs the transmission signal, a reception unit that receives the transmission signal, and a main body control unit that decodes the transmission signal received by the reception unit and controls the drive circuit. The transmission / reception means is formed by an antenna and an optical element, and the portable control unit measures the operation time of the operation switch, and determines a threshold for determining the length of the operation time to the operation switch. When a time TS is set and a time TA shorter than the threshold time TS is detected, the first operation signal is transmitted by the antenna, and a time TB longer than the threshold time TS is detected. In is obtained by constituting the keyless entry system for the transmission of only the second operation signal by the optical element, since the multi-functionality can be achieved in a single operation switch, inexpensive downsizing while realizing multifunction The keyless entry system including a portable device can be obtained. In addition, a single operation switch can be provided to prevent erroneous operation.
Further, the antenna has a function that does not need to be visually recognized, and the optical element has a function that needs to be visually recognized.

  As described above, according to the present invention, it is possible to obtain a keyless entry system including a portable device that can be downsized while being multi-functional and includes an inexpensive portable device.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

(Embodiment)
FIG. 1 is a block diagram of a keyless entry system according to an embodiment of the present invention, in which 11 is an operation switch, and one operation switch 11 is turned on when pressed and turned off when released. It is.

  Reference numeral 12 denotes a portable control unit, and the portable control unit 12 selects a desired operation signal from a plurality of operation signals stored in advance according to the length of operation time of the operation switch 11, and after the selection. An ID is added to the operation signal to generate a transmission signal.

  Here, the selection means of the portable control unit 12 is configured to select a desired operation signal from a plurality of operation signals by providing a threshold time TS for determining the length of the operation time to the operation switch 11. .

  Reference numeral 13 denotes a transmission means. The transmission means 13 is formed of a radio transmission antenna 13a and an optical infrared LED 13b and outputs a transmission signal. The signal arrival distance of the transmitting antenna 13a is set to about 20 m, and that of the infrared LED 13b is set to about 5 m.

  The portable device 10 includes the operation switch 11, the portable control unit 12, and the transmission unit 13.

  On the other hand, 23 is a receiving means, and the receiving means 23 for receiving a transmission signal is formed of a radio wave receiving antenna 23a and a photodiode or phototransistor 23b which is an optical infrared sensor.

  Reference numeral 22 denotes a main body control unit. The main body control unit 22 decodes a transmission signal received by any of the receiving means 23 and selects a plurality of drive circuits, and a main body in which an ID is stored in advance. And a storage unit.

  When the transmission signal is decoded by the main body control unit 22 and the ID of the transmission signal coincides with the ID stored in itself, the main body control unit 22 drives one of the plurality of drive circuits 24a and 24b to drive the actuators 25a, The main body 20 is configured to control any one of 25b.

  The portable device 10 and the main device 20 constitute a keyless entry system.

  Next, with respect to the operation of the keyless entry system, an example in which two functions of a first operation signal for locking and unlocking a vehicle door and a second operation signal for opening and closing a slide door will be described.

  As shown in FIG. 2 (a), the portable control unit 12 of the portable device 10 starts measuring time from the time t0 when the operation switch 11 is pressed and turned on by the selection means, and turns off at the time t1 before the threshold time TS. When detected, the first operation signal shown in FIG. 2B is selected, and the transmission signal A obtained by adding ID to the selected first operation signal is output from the transmission antenna 13a.

  In addition, when the portable control unit 12 detects that the time counting from the time t0 is turned off at the time t2 when the time exceeds the threshold time TS, the portable control unit 12 selects the second operation signal shown in FIG. The transmission signal B is output from the infrared LED 13b.

  On the other hand, in the main unit 20, the main body control unit 22 detects the transmission signals A and B received by the receiving unit 23, and selects which of the plurality of drive circuits 24a and 24b is to be controlled.

  That is, when receiving the transmission signal A, the main body control unit 22 controls driving of the door lock driving circuit 24a. When the door lock actuator 25a connected to the outside is locked, the unlocking operation is performed. Works locking.

  When the transmission signal B is received, the sliding door opening / closing driving circuit 24b is driven and controlled, and the sliding door opening / closing actuator 25b connected to the outside is opened, and the sliding door opening / closing actuator 25b is closed.

  Here, for example, the threshold time TS is set to 1 second, and a radio wave is used for the transmission signal A at a time TA such as a short press that is shorter than 1 second, and there is an obstacle such as another vehicle between the operator and the vehicle. In addition, it is used for functions such as locking and unlocking of a vehicle door that can be operated even when the distance is long.

  Further, in the time TB that is pressed longer than the threshold time TS, light is used for the transmission signal B, which is used for functions such as opening and closing of a sliding door that can be operated while being visually recognized by the operator.

  As described above, according to the present embodiment, by selecting a desired operation signal from a plurality of operation signals in accordance with the length of operation time of one operation switch 11, it is possible to realize multi-functionality and a small size. It is possible to obtain a keyless entry system including an inexpensive portable device that can be realized.

  Furthermore, by forming the transmission / reception means by an antenna and an optical element, the transmission / reception means can be properly used according to the function.

  Further, the portable control unit 12 of the portable device 10 can easily determine only the threshold time TS and the length of the operation time by providing the threshold time TS for the determination of the length of the operation time to the operation switch 11. A desired operation signal can be selected from a plurality of operation signals.

  Further, the present invention can be implemented even when a desired operation signal is selected by the number of operations to the operation switch 11 instead of the threshold time TS. For example, the first operation signal may be selected when the number of operations is one during a predetermined time of 3 seconds, and the second operation signal may be selected when the number of operations is two.

  Further, the present invention can be implemented by providing a plurality of operation switches 11 and selecting a plurality of operation signals for each operation switch. Thus, a plurality of operation signals can be selected according to the length of each operation switch, and further multi-function can be realized.

  The keyless entry system according to the present invention has the effect that the miniaturization can be achieved while realizing the multi-function, and the main unit mounted on the vehicle receives a transmission signal of the portable device and controls a plurality of functions. Useful for entry systems.

1 is a block diagram of a keyless entry system according to an embodiment of the present invention. Operation explanation diagram

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Portable machine 11 Operation switch 12 Portable control part 13 Transmission means 13a Transmission antenna (transmission means)
13b Infrared LED (transmission means)
20 Main Unit 22 Main Unit Control Unit 23 Receiving Unit 23a Receiving Antenna (Receiving Unit)
23b Phototransistor (Receiving means)
24a Door lock drive circuit 24b Slide door open / close drive circuit 25a Door lock actuator 25b Slide door open / close actuator A, B Transmission signal

Claims (1)

A portable device comprising: an operation switch; a portable control unit that selects an operation signal in accordance with an operation on the operation switch and generates a transmission signal by adding an ID to the operation signal; and a transmission unit that outputs the transmission signal Machine,
A receiving unit that receives the transmission signal; and a main unit that includes a main body control unit that decodes the transmission signal received by the receiving unit and controls a drive circuit;
The transmission / reception means is formed by an antenna and an optical element, and the portable control unit measures the operation time of the operation switch, and provides a threshold time TS for determining the length of the operation time to the operation switch. A keyless entry system that transmits a first operation signal by an antenna when a time TA shorter than the threshold time TS is detected, and transmits only a second operation signal by an optical element when a time TB longer than the threshold time TS is detected .

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