JPH0629290U - In-vehicle equipment control signal transmission circuit - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an on-vehicle device control signal transmission circuit that does not require a new vehicle harness to be passed through even when an on-vehicle device such as an air purifier is installed later. [Structure] Control means 2 for controlling the operation of the in-vehicle device 20 from a switch input means 11 for selecting the operation of the in-vehicle device 20
An in-vehicle device control signal transmission circuit for transmitting a control signal to the control signal 5, and control signal generation means 12 and 13 for generating a control signal corresponding to the input from the switch input means 11.
The signal transmitting means 14 for placing the control signal from the control signal generating means on the in-vehicle power supply line L, the signal receiving means 21 for receiving the signal sent to the in-vehicle power supply line L, and the signal received by the signal receiving means 21. It further includes a signal conversion unit 22 that converts the control signal to control the operation of the vehicle-mounted device 20 and outputs the control signal to the control unit 25.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an in-vehicle device control signal transmission circuit for transmitting a control signal from a switch input means for selecting the operation of the in-vehicle device to a control means for controlling the operation of the in-vehicle device.

[0002]

[Prior art]

 Conventionally, an air purifier mounted on a vehicle has been known. As shown in FIG. 4, such an air purifier includes a motor M that rotates a fan (not shown) to suck air in the vehicle interior, and a deodorizing unit that deodorizes or cleans the sucked air and discharges the air into the vehicle interior. 1, a motor drive unit 2 for driving the motor M, and a switch unit 3 for selecting the operation of the motor drive unit 2.

The switch section 3 includes two switches 3a and 3b, and is provided on an instrument panel in a vehicle compartment. On the other hand, the purifier body 4 incorporating the deodorizing unit 1 and the motor drive unit 2 is installed in a rear parcel or the like, and the motor drive unit 2 and the switch unit 3 are electrically connected by a vehicle harness 5.

When the switch 3a is turned on, the motor drive unit 2 rotates the motor M at high speed, when the switch 3b is turned on, the motor M is rotated at low speed, and when both switches 3a and 3b are turned off, the motor M rotates. To stop.

[0005]

[Problems to be solved by the device]

 However, in such an air purifier, since the motor drive unit 2 and the switch unit 3 are electrically connected by the vehicle harness 5, when the air purifier is later attached to the vehicle body, Since a new dexterous vehicle harness has to be passed through the vehicle body, seat sheets have to be removed and carpets on the floor have to be stripped in order to pass through this vehicle harness, there is a problem that it takes time and effort.

The present invention has been made in view of the above problems, and its purpose is not to pass a new vehicle harness even when an in-vehicle device such as an air cleaner is installed later. It is to provide an on-vehicle device control signal transmission circuit.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is an in-vehicle device control signal transmission circuit for transmitting a control signal from a switch input means for selecting an operation of an in-vehicle device to a control means for controlling the operation of the in-vehicle device.

The control signal generating means for generating a control signal corresponding to the input from the switch input means, the signal transmitting means for putting the control signal from the control signal generating means on the in-vehicle power source line, and the in-vehicle power source line It is provided with signal receiving means for receiving the signal sent thereto, and signal converting means for converting the signal received by the signal receiving means into a control signal for controlling the operation of the vehicle-mounted device and outputting the control signal to the control means. It is characterized by

[Action]

 With this configuration, the control signal generating means generates a control signal corresponding to the input from the switch input means, and the signal transmitting means puts the control signal on the in-vehicle power supply line and sends it to the in-vehicle power supply line. The signal receiving means receives the incoming signal, and the signal converting means converts the signal received by the signal receiving means into a control signal for controlling the operation of the vehicle-mounted device and outputs the control signal to the control means.

[0009]

【Example】

 An embodiment of an in-vehicle device control signal transmission circuit according to the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 10 denotes a switch transmission unit provided on an instrument panel or the like of a vehicle body. The switch transmission unit 10 includes a switch input unit (switch input means) 11, a signal generation unit 12, and a signal selection unit. It includes a unit 13, a signal transmission unit (signal transmission unit) 14, and a power supply unit 19 that supplies electric power to each of these units.

The switch input unit 11 includes switches 11a and 11b for setting the operation of the motor, which will be described later. The switch 11a is turned on to rotate the motor at a high speed, and the switch 11b is turned on to rotate the motor. Is set to low speed rotation, and the motor is stopped by turning off the switches 11a and 11b.

The signal generator 12 always outputs three signals (control signals) S1, S2, S3 as shown in A, B, C of FIG. Signal S1 is a pulse signal with a voltage of 5V, pulse width W1 and cycle T, signal S2 is a pulse signal with a voltage of 5V, pulse width W2 (W2> W1) and cycle T, and signal S3 is a voltage of 5V. Is a DC voltage signal.

The signal selection unit 13 selects the signals S 1, S 2 and S 3 output from the signal generation unit 12 according to the on / off state of the switches 11 a and 11 b of the switch input unit 11 and sends them to the signal transmission unit 14. It is a thing. That is, the signal selecting unit 13 causes the signal transmitting unit 15 to output the signal S1 when the switch 11a is turned on, and causes the signal transmitting unit 15 to output the signal S2 when the switch 11b is turned on. When both are turned off, the signal S3 is output to the signal transmitter 14. The signal generating unit 12 and the signal selecting unit 13 constitute control signal generating means. The signal generation unit 12 and the signal selection unit 13 are configured by one IC circuit 15 or the like, and the signals S1, S2, S3 are output from the output terminal 16 of the IC circuit 15.

The signal transmitter 14 includes a voltage converter 14a for converting the voltage of the signals S1, S2, S3 output from the signal selector 13 from 5V to 2V, and a signal obtained by adding 10V to this voltage (2V). (Control signals) G1, G2, G3 (see D to F in FIG. 3) and a power supply unit 14b to be placed on the line (in-vehicle power supply line) L.

A lamp 17 arranged in a trunk room (not shown) is connected to one end of the line L via a switch 18, and the other end of the line L is connected to a battery (not shown). The switch 18 is turned on when the luggage compartment is opened, and when the switch 18 is turned on, the lamp 17 is always turned on regardless of whether the switches 11a and 11b are turned on or off.

Reference numeral 20 denotes an air purifier main body portion provided on a rear parcel (not shown) of the vehicle. The air purifier main body portion 20 has a signal receiving portion (for receiving a signal put on the line L). Signal receiving means) 21, a signal converting section (signal converting means) 22 for converting the signal received by the signal receiving section 21 into signals S1, S2, S3 which are control signals, and a signal S1 converted by the signal converting section 22. , S2, S3, a signal latch unit 23, a motor drive unit (control means) 25 for driving and controlling the motor 24 based on the signal latched by the signal latch unit 23, and a fan rotated by the motor 24 (see FIG. A deodorizing unit 26 that deodorizes and cleans the air sucked by (not shown), a power supply unit 27 that supplies electric power to the motor 24 and each of the units 21 to 25, and the like are provided.

The signal receiving section 21 is provided with a pulse detecting section 21a for detecting a pulse, and the signal converting section 22 and the signal latching section 23 are composed of an FF circuit and the like. The motor drive unit 25 is composed of transistors and the like.

Next, the operation of the above embodiment will be described.

Now, for example, when the switch 11b is turned on and the motor 24 is set to a high speed rotation, the signal S2 is output from the signal selection unit 13, and the signal transmission unit 14 converts the signal G2 shown in E of FIG. Put on. Then, the signal receiving section 21 receives the signal G2, converts it into the signal S2 shown by B in FIG. 3, and outputs it to the signal converting section 22. Then, the signal converter 22 detects the pulse width W2 of the signal S2 and recognizes that the switch 11b is turned on. As a result, the signal converter 22 outputs a signal for rotating the motor 24 at high speed to the signal latch 23. In the signal latch unit 23, the motor 24 is energized to drive the motor 24 to rotate at high speed.

Next, when the switch 11a is turned on, the signal G1 is similarly placed on the line L, the signal receiving unit 21 receives the signal G1, converts it into the signal S2, and outputs it to the signal converting unit 22. Force Then, in the same manner as described above, the motor drive unit 25 energizes the motor 24 to rotate the motor 24 at a low speed.

When the switches 11a and 11b are off, the signal G3 is on the line L, but since the signal G3 is not a pulse signal, the signal receiving unit 21 does not detect a pulse. Therefore, the pulse signal is not output from the signal latch unit 23, and the motor 24 is not driven.

The signal latch unit 23 is reset after a lapse of a predetermined time when there is no new input within a predetermined time after being latched.

As described above, the signals G1 to G3 corresponding to the on / off states of the switches 11a and 11b are placed on the line L from the switch transmitter 10 and the signals G1 to G3 placed on the line L by the signal receiver 21. Since the motor 24 can be driven based on the received signals G1 to G3, it is not necessary to pass a new vehicle harness even when the air purifier is installed later. That is, since it is only necessary to use the power line L that has already been wired, it is not necessary to remove the seat and the carpet on the floor as in the conventional case, so that the air purifier can be easily installed later. .

In the above embodiment, the in-vehicle device control signal transmission circuit used for the air purifier has been described, but the present invention is not limited to this and can be applied to other in-vehicle devices.

[0025]

【effect】

 According to this invention, even when an on-vehicle device such as an air purifier is installed later, it is not necessary to pass a new vehicle harness, and the already wired power line L can be used. As described above, it is not necessary to remove the seats and the carpet on the floor, and the in-vehicle device can be easily installed later.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an in-vehicle device control signal transmission circuit according to the present invention,

FIG. 2 is a circuit diagram specifically showing the configuration of FIG.

FIG. 3 is a time chart showing signals of main parts of FIG.

FIG. 4 is a wiring diagram showing wiring of a conventional air purifier.

[Explanation of symbols]

 11 Switch Input Section 12 Signal Generation Section 13 Signal Selection Section 14 Signal Transmission Section 20 Air Purifier Main Body 21 Signal Reception Section 22 Signal Conversion Section 25 Motor Drive Section

Claims (1)

[Scope of utility model registration request] 1. An in-vehicle device control signal transmission circuit for transmitting a control signal from a switch input means for selecting an operation of an in-vehicle device to a control means for controlling an operation of the in-vehicle device, wherein an input from the switch input means is provided. Control signal generating means for generating a corresponding control signal, signal transmitting means for placing the control signal from the control signal generating means on the in-vehicle power source line, and signal receiving means for receiving the signal sent to the in-vehicle power source line An in-vehicle device control signal transmission circuit comprising: a signal converting unit that converts the signal received by the signal receiving unit into a control signal for controlling the operation of the in-vehicle device and outputs the control signal to the control unit.