JPS6249228B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention makes it easier to see the rear view by pressing the stop position of the wiper blade that wipes the mirror surface of the fender mirror against one corner of the mirror surface when the vehicle is in use, and prevents the wiper blade from bending when the vehicle is not in use. The present invention relates to a wiper device for a fender mirror in which the durability of the wiper blade is improved by stopping the wiper blade at a release position. As a wiper device for a fender mirror of this type, the inventors of the present invention built a wiper motor into the fender mirror, and detected each time a wiper blade driven by this motor reaches a predetermined wiping limit position. A device has been proposed in which a motor is driven in reverse by a drive control circuit (Japanese Patent Application No. 54-85091 (see Japanese Patent Publication No. 60-48370)). According to this device, when the fender mirror becomes difficult to see due to water droplets when driving in the rain, the wiper blade is driven while the wiper operation switch is turned on, removing the water droplets from the fender mirror and providing good rear visibility. be able to. By the way, in the above device, the blade stopping position when the wiper blade is not in use is
As shown in Fig. 1, in order to prevent the mirror surface 1 of the fender mirror from being obstructed by the wiper blade 2, the wiper blade 2 is bent and pressed against the corner of the mirror surface 1 at the position 2' indicated by the broken line. It is desirable to stop the vehicle at a low angle so that sufficient rearward visibility can be obtained through the fender mirror. However, when the blade 2' is in a stopped state as shown in FIG. 1, the wiper blade 2 is always pressed and bent. Since 2 is made of rubber, there is a risk that it may become bent and not return to its original shape, or the bent portion may deteriorate and crack, reducing its durability. Therefore, conventionally, the wiper blade is stopped at a position where the bending does not become too large, but the wiper blade partially blocks the mirror surface of the fender mirror, and although the rear visibility is sufficiently secured, the wiper blade does not bend too much. It was easy to see, and there was a risk that it would be difficult to see backwards. The present invention was made by focusing on such conventional problems, and in order to make it easier to see the rear view without impairing the durability of the wiper blade, the wiper blade is bent to one corner of the mirror surface when the vehicle is used. The purpose of the present invention is to solve the above-mentioned problems by pressing the wiper blade in the bent state and stopping the wiper blade, and when the vehicle is not in use, driving the wiper blade to a position where the wiper blade is released from the bent state and stopping. Hereinafter, the present invention will be explained based on the drawings. FIG. 2 is a circuit diagram showing an embodiment of the present invention. First, to explain the configuration, reference numeral 10 includes a slider 14 connected to the wiper drive shaft 12, and a wiper drive shaft 1.
This is a position detector that outputs a forward or reverse rotation command to the wiper motor 20 by contact with a pair of contact plates 16 and 18 arranged concentrically on the slider 14, and a power supply voltage +Vc is applied to the slider 14. At the point of contact between the slider 14 and the contact plate 16, a voltage +Vc that gives a forward rotation command is applied to the input terminal 22, and as the wiper drive shaft 12 rotates clockwise (normal rotation), it comes off the contact plate 16 and slides onto the contact plate 18. When the mover 14 comes into contact with the right side, a voltage +Vc for giving a reverse rotation command is applied to the input terminal 24. Next, as a drive control circuit unit that performs forward/reverse control of the wiper motor 20 according to the signal from the position detector 10, 26 and 28 are transistors that are turned on and off according to the signal from the position detector 10, and 30 is the activation of the wiper device. Switch, 32, 34, 3
6, 38, 40, 42, 44, 46 are motors 20
transistors 48, 50, and 5 that rotate the motor 20 in the forward or reverse direction by switching the direction of the current flowing through the motor;
2 and 54 are resistors that bias the transistors 32 and 40 to the on state. The above circuit section drives the wiper blade when the start switch 30 is turned on, and when the start switch 30 is turned on, the signal voltage +Vc from the position detector 10 is applied to the transistor The voltage is applied to the base of transistor 26 and turns on, and each of transistors 34, 36, and 38 is also turned on, and the power supply +Vc→transistor 34→
Current flows through the motor 20 through a path from the motor 20 to the transistor 38, and the motor 20 rotates in the forward direction. When the slider 14 of the position detector 10 rotates clockwise due to the forward rotation of the motor 20 and comes into contact with the contact plate 18, the transistor 28 is also turned on.
Since the emitter of transistor 4 is grounded when transistor 38 is turned on, it does not turn on, keeping transistor 46 off. When the slider 14 rotates further and the contact with the contact plate 16 is broken, the transistor 26 is turned off, and each of the transistors 34, 36, and 38 that had been turned on is also turned off. 42, 44, and 46 are turned on. For this reason, power supply +Vc → transistor 42 →
A current flows in the opposite direction to the motor 20 through the path from the motor 20 to the transistor 46, and the motor 20 begins to rotate in reverse. Thereafter, forward rotation and reverse rotation are repeated in the same manner, and when the start switch 30 is turned off, the movement stops when the slider 14 of the position detector 10 returns to the initial position shown. Next, the configuration of the stop position control means used in the present invention will be explained with reference to FIG. First, as a means of detecting the usage status of a vehicle,
The switch contact that closes when the ignition switch is in the on position is used as a usage state detection switch 56, and the means for detecting the non-use state of the vehicle is as follows:
A switch contact that closes at the ACC position (accessory position) of the ignition switch is used as the non-use state detection switch 58. On the other hand, the wiper drive shaft 1 of the position detector 10 is used as means for detecting the operating state stop position A and the non-use state stopping position B of the wiper blade 2 shown in FIG.
Another slider 60 is provided which is connected to the stop position A in the in-use state, and has a contact 64 in correspondence to the stop position A in the non-use state. A contact 66 is interposed between them. The usage state detection switch 56 is connected to the interlocking contact 5.
6a, 56b, and the non-use state detection switch 58 also includes interlocking contacts 58a, 58b. The usage state detection switch 56 connects the power supply +Vc to the slider 60, connects the contact 66 of the slider 60 to one side of the motor 20, and connects the other side of the motor 20 to the interlocking contact 56b and wiper drive. axis 1
It is connected to ground via a slider 68 connected to 2. Further, the contact 62 in the use state stop position is connected to the power supply +Vc via the interlocking contact 56a and the non-use state detection switch 58. Further, the contact 64 in the non-use stop position is connected to the interlocking contact 58.
a to the power supply +Vc and one end of the motor 20, and the slider 60 is grounded via a resistor 70, a slider 72, and an interlocking contact 58b. A series circuit of a relay coil 74, a relay contact 74r, and a timer 76 connected in parallel to the non-use state detection switch 58 is connected to the non-use state detection switch 5.
8, that is, the wiper blade is provided so that the wiper blade can be rotated to the non-use state stop position B (see FIG. 3) even when the accessory switch is momentarily turned off. Next, the operation of controlling the stop position of the wiper blade will be explained. First, if the usage state detection switch 56 and its interlocking contacts 56a and 56b are closed by turning on the ignition switch, the usage state detection switch 56 → slider 60 (contact 66)
→ Motor 20 → Interlocking contact 56b → Slider 68 → Ground A circuit is formed, and the motor 20 rotates toward the operating state stop position A. When the slider 60 comes into contact with the contact 62, the contact of the slider 68 is opened, and the motor 20 stops when the operating state stop position determined by the contact 62 is reached, as shown in FIG. , the wiper blade is stopped at the operating state stop position A. At this time, the slider 72 is in the closed position. Next, when the vehicle is stopped, the engine is turned off, and the ignition switch is returned to the accessory position, the non-use state detection switch 58 and its interlocking contacts 58a and 58b are closed, while the use state detection switch 56 and its interlocking contacts are closed. Since the contacts 56a and 56b open, a circuit is formed in which the power supply +Vc → non-use state detection switch 58 → motor 20 → slider 60 (contact 66) → resistor 70 → slider 72 → vehicle contact 58b → ground. Therefore, a current flows through the motor 20 in the opposite direction to that during use, rotating the wiper blade toward the non-use state stop position B shown in FIG. When the slider 60 reaches the position where it contacts the contact 64, the slider 72 opens as shown, the above circuit is cut off, the motor 20 stops, and the wiper blade is stopped at the non-use state stop position. . Note that the non-use state detection switch 58 is
If the wiper blade is turned off momentarily during operation, the relay coil 74 is energized and closes the relay contact 74r, and the motor 20 is supplied with power until the timer 76 is started and the wiper blade reaches the non-use state stop position.
Vc will now be applied. By controlling the stop position of the wiper blade in such a manner that it is divided into the used state and the non-used state, as shown in FIG.
The wiper blade is pressed in a bent state to the use state stop position A at one corner of the mirror surface 1 shown by .
The view of the mirror surface 1 is hardly obstructed by the wiper blade, and on the other hand, when the wiper blade is not in use, the wiper blade 2 is placed in the non-use state stop position B, so that the bending of the wiper blade is released and the durability due to the bending of the wiper blade is reduced. Reliably prevent sexual decline. FIG. 4 shows another embodiment of the present invention,
This embodiment is characterized in that the operating state and non-using state of the vehicle are detected based on whether or not the engine is rotating. That is, the rotation of the engine is detected by the rotation sensor 78 and amplified by the amplifier 80, and the output of the amplifier 80 energizes the relay coil 82 to connect the normally open contact 82.
a, the normally closed contact 82b is switched, and the normally open contact 82a corresponds to the usage state detection switch 56 in the embodiment shown in FIG.
b corresponds to the non-use state detection switch 58, and the interlocking contacts 82a ₁ , 82a ₂ and 82 respectively
b ₁ and 82b ₂ . The other circuit configuration is exactly the same as the embodiment shown in FIG. 2 (excluding the relay coil 74, relay contact 74r, and timer 76).
When the engine starts, the wiper blade moves to the stopped position when the engine is stopped, and when the engine is stopped, the wiper blade returns to the stopped position when the engine is stopped. In addition, the above embodiment is an ignition switch,
Although the operating state and non-using state are detected based on the presence or absence of engine rotation, other detection means as shown in the following table may be used.

[Table] As explained above, according to the present invention, when the vehicle is in use, the wiper blade is pressed against one corner of the mirror surface in a bent state and stopped, and when the vehicle is not in use, the wiper blade is The wiper blade is driven to the position where the wiper blade is unbent and then stopped, making it easier to see the rear view of the fender mirror when the vehicle is in use, and the wiper blade is in the unbent and free state when the vehicle is not in use. Since the blade is placed in place, the durability of the rubber forming the blade can be improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional wiper for a fender mirror, and FIG. 2 is a circuit diagram showing an embodiment of the present invention.
FIG. 3 is an explanatory diagram showing the stop position of the wiper blade according to the present invention, and FIG. 4 is a circuit diagram showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Mirror surface, 2... Wiper blade, 10... Position detector, 12... Wiper drive shaft, 14, 60, 68,
72... Slider, 16, 18... Contact plate, 22, 24
...Input terminal, 20...Motor, 30...Start switch, 62, 64, 66...Contact, 56...Usage state detection switch, 58...Non-use state detection switch, 5
6a, 56b, 58a, 58b... interlocking contact, 78
...Rotation sensor, 80...Amplifier, 76...Timer, 7
4,82...Relay coil.

Claims (1)

[Claims] 1 A wiper for a fender mirror, comprising a wiper blade for wiping a fender mirror, a motor for driving the wiper blade, and a drive control circuit for driving the motor in reverse every time the wiper blade reaches a predetermined wiping limit position. The device includes a usage state detection means for detecting and outputting the usage state of the vehicle, a non-use state detection means for detecting and outputting the non-use state of the vehicle, and a non-use state detection means for detecting and outputting the non-use state of the vehicle; When the detection means outputs an output, the wiper blade is driven to one corner of the mirror surface and stopped in a bent state, and when the non-use state detection means outputs an output, the wiper blade is driven to a predetermined position where the wiper blade is released from the bent state. A wiper device for a fender mirror, comprising a stop position control means for stopping the wiper device.