JPS6144913Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a wiper control device, and particularly to an intermittent wiper operating device for a front wiper and a rear wiper. The current intermittent operating device for the rear wiper is the same as the one for the front wiper, and no consideration has been given to practical aspects, so of course it is inconvenient to have to operate the intermittent operating device for the front and rear separately. However, since these separate circuits and switches are provided together, there is a drawback that the cost is high. The present invention aims to simplify operation and reduce costs by integrating these into one system and making them interrelated. The operating conditions of the front wiper (intermittent, Lo, Hi) are determined by the driver. Since it is selected at the appropriate time, the rear wiper is operated in conjunction with this, for example, as shown in the table below.

【table】

[Table] An example of implementing the present invention will be explained below with reference to the drawings. FIG. 1 is an explanatory diagram showing an outline of the device of the present invention.
is the front motor that drives the front wiper, 2 is the rear motor that drives the rear wiper, and 3 is the front switch that selects the front wiper operating mode (Hi operation, Lo operation, intermittent operation, OFF) (the horizontal axis is The vertical axis indicates the terminals in the selection mode, and the vertically connected lines in each mode indicate the connection state between the terminals.) 4 is a control device that is the main body of the present invention, and 5 is a control device that is linked to the shift lever of the automobile. 6 is the backlight of the car; 7 is the power supply; 8 is the front auto-stop switch that is linked to the front motor 1 (when the movable terminal is in the wiper stop position) 9 is a rear auto-stop switch that is linked to the rear motor 2, and 11 is a front motor 1. 12 is a rear relay that controls the rear motor 2; 13, 1 is a rear relay that controls the rear motor 2;
4 is a transistor that controls the rear relay 12; 15 is a front intermittent device that controls the front relay 11 and outputs a signal of a duration shorter than one wipe of the front wiper intermittently to operate the front wiper intermittently; 16 is a front intermittent device A counting circuit that counts the input signals and outputs one signal for a time shorter than one wipe of the rear wiper when a predetermined number of signals are counted. 17 inputs a rectangular wave signal of the front auto-stop switch 8 and operates the auto-stop switch 8. This is a waveform shaping circuit that outputs a very short signal indicating that the terminal is in contact with the ground terminal. The front motor 1 has one end connected to the power supply 7 and the other end connected to the Hi or Lo terminal of the front switch 3, and the front relay 11 has its movable contact connected to the iNT (COM) terminal of the front switch and its NO contact connected to ground. An NC contact is connected to a movable contact of a front auto-stop switch 8, and a coil is connected to an intermittent device 15, respectively. Therefore, when the front switch 3 is in the Hi or Lo position, the front motor 1 is supplied with power through the respective terminals and operates continuously. Furthermore, when the front switch 3 is in the iNT position, the front motor 1 is powered by the output of the intermittent device 15 through the Lo terminal of the front switch 3, iNT terminal → the movable contact of the front relay 11, and the NO contact. When it starts and the output of the intermittent device disappears, the front switch 3 goes to Lo.
Power is supplied through the terminal, iNT → terminal → movable contact of front relay 11, NC contact → movable terminal of front auto stop switch 8, and ground side terminal, and operation continues. When the front wiper comes to the stop position, the front auto stop switch is activated. Since it comes into contact with the motor side terminal of No. 8, the brake is stopped and the operation is stopped until the intermittent device 15 outputs the next signal. On the other hand, one end of the rear motor 2 is connected to a power source 7, and the other end is connected to a movable contact of a rear relay 12, whose NO contact is connected to ground and whose NC contact is connected to a movable terminal of a rear auto-stop switch 9. ing. Further, the movable terminal of the front auto-stop switch 8 is connected to the waveform shaping circuit 17.
The circuit 17 is connected to the counting circuit 16 and the circuit 1
6 is connected to the base of a transistor 13, and the collector of the transistor 13 is connected to the coil of the rear relay 12. Furthermore, the back gear switch 5, which has one end connected to the power supply 7, is connected to the back light whose one end is grounded, the connection point between the two is connected to the base of the transistor 14, and the emitter of the transistor 14 is connected to the base of the transistor 13. , the base of the transistor 13 is connected to the OFF (-) terminal of the front switch 3. Therefore, when the front wiper operates, the movable terminal of the front auto stop switch 8 is repeatedly switched between the ground side terminal and the motor side terminal, and this rectangular wave signal is inputted to the waveform shaping circuit 17, and the movable terminal of the front auto stop switch 8 is switched repeatedly. Each time the movable terminal touches the ground terminal side, it outputs a very short signal. Then, upon receiving this signal, in other words, a signal indicating the number of times the front wiper is operated, the counting circuit 16 counts this signal, and when a predetermined number of units has been counted, outputs one signal, and connects the transistor 13 and the rear relay 12. to strengthen Rear relay 1
2 is energized, the rear motor 2 is powered through the movable contact and the NO contact of the rear relay 12 and starts. Even if the rear relay 12 is de-energized, the rear motor is connected to the movable contact of the rear relay, the NC contact → the movable terminal of the rear auto stop switch,
Power is supplied through the ground terminal and it continues to operate. When the rear wiper reaches the stop position, the movable terminal of the rear auto stop switch 9 comes into contact with the motor side terminal, the rear motor 2 is braked to a stop, and this state is maintained until the counting circuit 16 issues a signal again.
Also, when the back gear switch 5 is turned on when the front switch 3 is in a position other than the OFF position, the base potential of the transistor 14 is pulled up and turned on, and the transistor 13 is also turned on, causing the rear relay 12 to turn on.
is energized, the rear motor 2 is supplied with power through the movable terminal of the rear relay and the NO contact, and continues to operate until the back gear switch 5 is turned off. Next, the operation of the above device will be explained in relation to the states of the front wiper switch and the back gear switch. (1) Front wiper switch 3 is in the OFF position. When front motor 1 is OFF and back gear switch 5 is ON, transistor 14 is in the OFF position.
is positively biased, but front switch 3
Since the transistor 13 is turned off by connecting OFF (-) and (-), both the front and rear motors 1 and 2 do not operate. (2) The front wiper switch 3 is in the Int (intermittent) position. By connecting the (+) and Int (+) of the front wiper switch 3 to the front intermittent device 15,
(+) Power supply is connected, front relay 11
By turning ON and OFF at regular intervals, the front motor 1 is operated intermittently. Due to the intermittent operation of the front motor 1, the front auto stop switch 8 generates one waveform wave a ((-) signal of the operating position, etc.) per one rotation (output shaft) of the motor 1, and the rectangular wave a
is led to the waveform shaping circuit 17 and waveform shaped b, then the counting circuit 16 counts the number of rotations of the motor 1, outputs one pulse for every several operations of the motor 1, and turns on the transistor 13. , turns on the rear relay 12 and operates the rear motor 2. Figure 2 shows, as an example, a time chart when motor 1 operates 5 times and motor 2 operates once. B indicates the operation of the rear motor 2. (3) The front wiper switch 3 is in the Lo (low speed) or Hi (high speed) position. In this case, the front motor 1 operates continuously, and the rear motor 2 operates automatically as explained in (2) above. By counting the signals of the switch 8, the motor 1 is activated once after being activated several times. Figure 3 shows, as an example, a time chart when motor 1 operates 5 times and motor 2 operates once. B shows the operation of the rear motor 2). In addition, in the case of Lo or Hi, the motor rotation time is different, so the rear motor 2
The one cycle time of is also different. (4) When the back gear switch 5 is ON and the front switch 3 is Hi, Lo, or Int When the back gear switch 5 is turned ON, a positive bias is applied to the base of the transistor 14.
Transistor 14, transistor 13, rear relay 1
2 is turned ON and rear motor 2 operates continuously. Note that when the front switch 3 is OFF, the rear motor 2 is inactive as described in (1) above. In Fig. 4, as an example, the front switch 3 is set to Int, and the back switch 5 is turned on halfway.
This shows the time chart in case of
A indicates the operation of the front auto stop 8 (contact status of the movable terminal with the motor side terminal or the ground side terminal), B indicates the operation of the rear motor 2, and C indicates the operation of the back gear switch 5. It is. According to the present invention, the rear wiper automatically operates in accordance with the operating conditions of the front wiper, simplifying the operation, and eliminating the need to switch the rear wiper, resulting in a reduction in cost. In addition, when the back gear switch is not ON, the rear wiper operates once for each wipe operation of the front wiper several times, so the rear windshield receives less scratches under normal driving conditions. It also has the effect of preventing sticking.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention, and FIG. 1 is an explanatory diagram showing an outline of the apparatus, and FIGS. 2 to 4 are time charts showing an example of each state. The symbols in the drawings indicate the following members, respectively. 1: Front motor, 2: Rear motor, 3: Front switch, 4: Control device, 5: Back gear switch, 6: Back light, 7: Power supply,
8: Auto stop switch for front, 9: Auto stop switch for rear, 11: Relay for front, 12: Relay for rear, 13: Transistor, 14: Transistor, 15: Intermittent device for front, 16: Counting circuit, 17: Waveform shaping circuit.

Claims (1)

[Scope of utility model registration request] A front motor 1 that drives a front wiper, a front auto stop switch 8 that is linked to the front motor 1, a rear motor 2 that drives a rear wiper, and a series that selects the operating mode of the front wiper. operating position,
a front wiper switch 3 having an intermittent operating position and an OFF position; an intermittent device 15 for intermittently operating the front motor 1 in the intermittent operating position of the front wiper switch 3; a waveform shaping circuit 17 that shapes the rectangular wave obtained from the auto-stop switch 8; a counting circuit 16 that counts the waveform-shaped signals and outputs one signal for a predetermined number of signals; With the output signal of the counting circuit
The transistor 13 that turns on and the transistor 1
a rear relay 12 which is energized by the switch 3 and controls power supply to the rear motor 2; a transistor 14 which detects the backward movement of the vehicle and turns on the transistor 13;
The transistor 13 is turned off in the OFF position.
A wiper control device comprising a control device 4 comprising means for.