JP2917793B2 - Wiper device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper device.

[0002]

2. Description of the Related Art As shown in FIGS. 1 and 2, rain and snow adhering to a windshield glass of a vehicle are disposed at a predetermined position below a front side of a windshield glass (hereinafter simply referred to as "glass") 2 of a vehicle body 1. The wiper device 3 wipes it off. The wiper device 3 includes a pivot 4 rotatably disposed on the vehicle body 1, an arm head 5 having a base end fixed to a tip of the pivot 4, and a pivot having a base end capable of being raised and lowered at the tip of the arm head 5. A wiper arm 8 including a supported retainer 6 and an arm piece 7 whose base end is fixed to the distal end of the retainer 6, and a pin that has a central portion at the distal end of the arm piece 7 and is swingable in the axial direction of the arm piece 7. 9 is supported by a wiper blade 10 supported by the wiper blade 10 and a spring (not shown) provided between the distal end of the arm head 5 and the base end of the arm piece 7. A blade rubber 11 pressed against the surface of the glass 2 and a pivot 4 disposed on the vehicle body 1 side;
And a driving device (not shown) for rotating the motor over a predetermined range. Then, the wiper arm 8 is rotated by the pivot 4 so that the blade rubber 11 wipes rain, snow, and the like attached to the surface of the glass 2 (FIG. 3).

[0003] In the wiper device 3, the axial direction of the pivot 4 is constant over the entire rotation range of the wiper arm 8. Therefore, the angle θ between the wiper blade 10 and the surface of the glass 2
(Hereinafter, referred to as “error angle”) greatly changes in accordance with a change in curvature in a range where the glass 2 is wiped. Generally, the value of the error angle θ is approximately ± 4 ° <θ, where the direction in which the wiper blade 10 wipes up from the stop position (counterclockwise) is positive, and the direction in which the wiper blade 10 wipes down (clockwise) is negative.
The tilt of the pivot 4 is set so as to be in a range of <± 8 °.

[0004]

However, when the vehicle speed is medium,
In the case of low speed, the wiper arm 8 and the wiper blade 10
The wind pressure (air resistance) received is small, and the error angle is not affected so much that there is no particular problem. However,
At high speeds or strong winds, the wiper arm 8 and the wiper blade 10 are pressed by the wind pressure, so that the rotation of the wiper arm 8 in the twisting direction around the joint 12 between the wiper arm 8 and the wiper blade 10 as shown in FIG. It will create power. Therefore, the error angle changes. In particular, when rotating in the wiping (clockwise) direction, the wind pressure is strongly affected. On the other hand, when rotating in the wiping (counterclockwise) direction, it is only pushed in the direction of travel and is not significantly affected.

When the error angle θ greatly changes, a very thin film of water is formed due to water droplets attached to the glass surface, or when the wiper blade 10 is turned over, the blade rubber 11 cannot be turned over and the Of the wiping, such as a phenomenon of so-called chatter. The present invention has been made in view of the above points, and has as its object to provide a wiper device that swings a wiper arm to an optimum value in accordance with wind pressure to maintain an error angle in an ideal range. .

[0006]

According to the present invention, a wiper arm having a base end mounted on an upper end of a pivot and a wiper blade provided at a distal end is rotated by the pivot to form a glass surface. A wiper device that is interposed between an upper end of the pivot and a base end of the wiper arm, and that supports the wiper arm so as to be relatively non-rotatable with the pivot and swingably in a wiping direction; A drive mechanism interposed between a pivot and a base end of the wiper arm, for swinging the wiper arm, and a drive mechanism for wiping down the wiper arm ;
Control the drive mechanism to reverse the direction of travel of the wiper arm.
Swings the wiper arm in the direction
Control means for increasing the swing angle of the wiper arm in accordance with the increase .

[0007]

The support mechanism rotates the base end of the wiper arm at the upper end of the pivot together with the pivot and supports the wiper arm so as to be swingable in the wiping direction of the wiper arm. The control means operates in synchronization with the rotation of the pivot and moves the wiper arm in the wiping direction.
When, the drive mechanism is controlled to move the wiper arm
Swings the wiper arm in the opposite direction to the
The swing angle of the wiper arm is increased in accordance with the increase of. Obedience
Therefore, the wind pressure acting on the wiper arm increases with the vehicle speed.
Then, the swing angle of the wiper arm is correspondingly increased.
Therefore, the inclination angle of the blade rubber is maintained at the optimum value.
You .

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 5 and 6, the pivot 21 of the wiper device 20 is configured such that the upper end 21b of the shaft portion 21a is formed in a spherical shape having a larger diameter than the shaft portion 21a (hereinafter, referred to as “spherical portion 21b”). A continuous portion 21c with the portion 21a is formed in a tapered shape (hereinafter, referred to as a "tapered portion 21c"). That is, the upper end of the pivot 21 has a ball joint structure. Then, the tapered portion 2 of the pivot 21
1c, a long slot 21d flat along the axial direction
Are penetrated perpendicularly (X-axis direction) in the axial direction (Z-axis direction) and the axial direction (Y-axis direction) of the wiper arm. A flat shaft (hereinafter referred to as a “flat shaft”) 22 is provided in the elongated hole 21d.
Are press-fitted, and both ends 22a and 22b
1 protrudes the same length on both sides.

On the other hand, the base end 23a of the arm head 23 constituting the wiper arm has a cylindrical shape and has a lower portion 23a.
b has a slightly larger diameter, and holes 23c to 23e are provided in the axial direction. The hole 23d has an upper portion that is recessed into a hemisphere and opens toward the upper hole 23c, and a lower portion is tapered and has a larger diameter. And is open to the lower hole 23e. Holes 23c, 23e
Has a larger diameter than the spherical portion 21b of the pivot 21, the hole 23d has a concave portion slightly larger than the spherical portion 21b, and a tapered portion formed larger than the taper angle of the tapered portion 21c of the pivot 21. Further, the shaft portion 21a can be penetrated with a slight gap. The lower portion of the hole 23e is enlarged in accordance with the outer diameter.

Further, slits 23f and 23g, which are flat in the axial direction along the axial direction, are provided at both ends in the diameter near the center of the side wall of the hole 23e at the base end 23a. The direction of the diameter at which these slits 23f and 23g are arranged is:
The direction matches the direction perpendicular to the axial direction of the wiper arm, that is, the wiping direction of the wiper arm. And the slit 23
f and 23g are set slightly wider than the flat shaft 22 provided on the pivot 21.

The arm head 23 is mounted on the upper end of the pivot 21, the lower half of the spherical portion 21b is slidably fitted in the recess of the hole 23d, and both ends 22a, 22a of the flat shaft 22 are provided.
b is in the longitudinal direction (axial direction) in slits 23f and 23g, respectively.
To be slidably inserted into. Then, cap 2 is inserted into hole 23c.
4 is fitted and fixed to the partition wall with the hole 23d by the screw 25. The cap 24 has a hemispherical recess corresponding to the recess of the hole 23d in the center of the lower surface, and is slidably fitted to the upper half of the spherical portion 21b of the pivot 21. That is, the base end 23 a of the arm head 23 is supported on the upper end of the pivot 21 by the ball joint structure.

The arm head 23 has two ends 22.
The flat shafts 22 a and 22 b are supported by the flat shafts 22 fitted in the slits 23 f and 23 g so as to be unable to rotate relative to the pivot 21. The flat shaft 22 has flat sides at both ends 22a and 22b in sliding contact with both sides of the slits 23f and 23g, respectively, and a mounting position with the pivot 21 is the arm head 23.
Of the pivot 21, that is, below the center of the spherical portion 21 b of the pivot 21 (displaced), the arm head 23 moves the axis of the pivot 21 with respect to the axial direction (Y-axis direction) of the wiper arm. Swinging (undulating) in the direction (Z-axis direction) is prevented. Note that the shaft 22 does not necessarily need to be a flat shaft, and may be a round bar.

Further, the arm head 23 can swing in the wiping direction of the wiper arm about the spherical portion 21b by moving the opposite ends 22a, 22b of the flat shaft 22 in the slits 23f, 23g in opposite directions. Is done. That is, the arm head 23 rotates in the directions of arrows A and A 'together with the pivot 21 and can swing in the wiping direction of the wiper blade indicated by arrows B and B'. The swing range of the arm head 23 is determined by the slits 23f and 2f.
A desired range can be determined by adjusting the distance between each upper end surface of 3 g and each upper end surface of both ends 22 a and 22 b of the flat shaft 22 opposed to each other. Thus, the support mechanism 26 that supports the arm head 23 on the pivot 21 is configured. Note that a wiper arm and a wiper blade (both not shown) are attached to a tip 23h of the arm head 23.

A drive mechanism 30 for swinging the arm head 23 is interposed between the lower part of the pivot 21 and the lower end of the base end 23a of the arm head 23, as shown in FIG. The drive mechanism 30 uses a hydraulic actuator, and includes a support base 31, a hydraulic cylinder 3
2, 33 and rods 34, 35, links 36, 37,
It comprises a hydraulic cylinder 40, a linear solenoid 50, and the like. Then, the linear solenoid 50 is controlled by the control circuit 60. The support base 31 is formed in a disk shape, and the pivot 21 is vertically penetrated through a hole formed in the center, and is fixed to a lower portion of the pivot 21. Pivot 2
1 is connected to the pivot 2 via a link 27.
1 is connected to a drive device (not shown) for controlling the rotation of the motor 1.

The cylinders 32 and 33 are placed on the support table 31.
The arm head 23 is vertically provided below the lower portion 23b of the base end 23a and below the slits 23f and 23g. On the other hand, a slit 23 is provided at the lower end of the arm head 23.
The upper ends of the links 36 and 37 are rotatably connected to positions below f and 23g, respectively.
Is rotatably connected to the rods 34, 35 of the cylinders 32, 33. In the cylinders 32 and 33, springs 38 and 39 are contracted on the opposite sides of the oil chambers 32a and 33a, respectively.

The support base 31 is provided with small holes 31a, 31b communicating with the oil chambers 32a, 33a of the cylinders 32, 33, and these small holes 31a, 31b are connected via flexible hoses 43, 44. Port 4 of cylinder 40
0a, 40b. A linear solenoid 50 is connected to the tip of the rod 41 of the cylinder 40.

The linear solenoid 50 includes a casing 51
The core 52 is housed in the inside so as to be slidable in the axial direction.
Solenoids 53 and 54 and return spring 5 at both ends
5 and 56 are housed, and both ends 52 a, 5
2b can enter and exit the corresponding solenoids 53 and 54. The tip of the rod 41 of the cylinder 4 is fixed to one end 52 a of the core 52 of the linear solenoid 50.

When the solenoids 53 and 54 are deenergized, the core 52 is held at the center by the spring force of the return springs 55 and 56. When the solenoid 53 is energized, the core 52 moves to the left in FIG. When it is energized, it moves to the right. The amount of movement is determined by the solenoid 5
3, and 54 (in proportion to) the drive current. That is, the core 52 moves to a position where the suction force of the solenoid 53 and the spring force of the spring 55 or the suction force of the solenoid 54 and the spring force of the spring 56 are balanced. These solenoids 53 and 54 are connected to a control circuit 60.

The control circuit 60 includes a computer, and includes a rotation direction sensor 61 for detecting the rotation direction of the wiper arm, a rotation angle sensor 62 for detecting the rotation angle of the wiper arm, glass shape data 63, and a vehicle speed sensor 64. The information is taken in and the linear solenoid 50 is controlled. The rotation direction sensor 61 and the rotation angle sensor 62 are, for example,
It is interposed between a link 27 of a driving device for rotating the pivot 21 of the wiper device 20 and the vehicle body, and detects a moving direction and a moving amount of the link 27. The vehicle speed sensor 64 detects the vehicle speed of the vehicle. The vehicle speed signal is used as a signal indicating the wind pressure received by the wiper blade during traveling. The glass shape data 63 is stored in the memory of the computer.

The operation will be described below. In FIG. 7, when the piston 42 of the cylinder 40 is at the center position shown by the dotted line, the same amount of oil is supplied to the oil chambers 32a and 33a of the cylinders 32 and 33, and the protruding lengths of the pistons 34 and 35 are the same. , The arm head 23 becomes horizontal. At this time, the wiper blade is perpendicular to the glass surface, and the error angle becomes zero. When the piston 42 of the cylinder 40 moves rightward (in the direction of arrow C) as shown by the solid line by the linear solenoid 50, the oil in the oil chamber 40c of the cylinder 40 moves to the oil chamber 32a of the cylinder 32 and the oil of the cylinder 33 The oil in the chamber 33a moves to the oil chamber 40d of the cylinder 40.

As a result, the piston 34 of the cylinder 32 moves upward against the spring force of the spring 38, and pushes up the right side of the arm head 23 via the link 36. On the other hand, the piston 35 of the cylinder 33 is pushed down by the spring force of the link 37 and the spring 39 to pull down the left side of the arm head 23. Thereby, the arm head 23 swings in the direction of arrow B.

When the piston 42 of the cylinder 40 moves to the left (in the direction of arrow C ') in the figure, the rod 35 of the cylinder 33 moves upward,
Descends. As a result, the arm head 23 swings in the direction of arrow B '. That is, the arm head 23 is
It swings with the reciprocation of 0. As a result, the error angle changes. On the other hand, the pivot 21 rotates according to the reciprocating motion of the link 27, and rotates the arm blade along the glass surface. Therefore, the pivot 21 is controlled by the control circuit 60.
The error angle can be maintained within a predetermined range by swinging the arm head 23 in synchronization with the rotation of.

When the wiper motor is driven to start the wiper operation, the control circuit 60 controls the rotation direction sensor 6.
The rotation direction of the pivot 21 is detected based on the signal input from 1 to determine whether the rotation is counterclockwise (wiping up) or clockwise (wiping down) (step S1 in FIG. 8). In the direction indicated by arrow A, the rotation angle of the wiper arm is detected based on a signal input from the rotation angle sensor 62 (step S).
2).

Next, the control circuit 60 sequentially reads data of the glass surface shape corresponding to the turning angle (wiping position) of the wiper arm from the memory (step S3), and calculates an error angle corresponding to the turning angle. Then, the calculated error angle is corrected by the glass surface shape data (step S4). When the vehicle speed is high, the wiper arm and the wiper blade are pushed by the wind pressure, and as described above, a rotational force in the twisting direction of the wiper arm is generated around the joint between the wiper arm and the wiper blade.
However, when the wiper is rotated in the wiping (counterclockwise) direction, the wiper is only pushed in the traveling direction and is not significantly affected. Therefore, at the time of the wiping (at the time of counterclockwise rotation), the correction by the wind pressure is not performed.

The control circuit 60 calculates the amount of displacement of the swing angle of the wiper arm based on the error angle calculated and corrected in step S4, outputs a drive current corresponding to the amount of displacement (step S5), and outputs a linear solenoid. Energize 50 solenoids 53 (FIG. 7). The linear solenoid 50 is
When the solenoid 53 is urged, the core 52 pushes the rod 41 in the direction of arrow C, and swings the arm head 23 in the direction of arrow B. Thereby, the error angle at the time of wiping the wiper is maintained in the ideal range.

The control circuit 60 determines whether or not the wind pressure received by the wiper arm is high when the wiper arm is clockwise in step S1, that is, when the wiper arm is wiped down (in the direction of arrow A 'in FIG. 5) (step S6). The wind pressure is low when the vehicle speed is medium or low, and high when the vehicle speed is high. Therefore, the control circuit 60 determines the level of the wind pressure received by the wiper arm based on the signal from the vehicle speed sensor 64. When the wind pressure is low, the rotation angle of the wiper arm is detected (step S7).
Proceeding to step S3, no correction based on the wind pressure is performed as in the case of wiping.

When the wind pressure is high, the control circuit 60 sequentially reads the glass surface shape data corresponding to the rotation angle (wiping position) of the wiper arm from the memory (step S).
8) An error angle corresponding to the rotation angle is calculated, and the calculated error angle is corrected by the glass surface shape data (step S9). Next, the control circuit 60 reads a correction value for the wind pressure based on the vehicle speed signal input from the vehicle speed sensor 64, and corrects the error angle calculated in step S9 (step S10). The vehicle speed and the wind pressure correspond, and the arm swing angle increases as the vehicle speed increases, and the direction always corresponds. Therefore, as shown in FIG. 9, a correction value of the arm swing angle with respect to the vehicle speed is set in a map, and a correction value corresponding to the vehicle speed is extracted.

The control circuit 60 calculates the amount of displacement of the swing angle of the wiper blade according to the error angle corrected in step S10, outputs a drive current corresponding to the amount of displacement (step S5), and outputs a linear solenoid. Energize 50 solenoids 54 (FIG. 7). When the solenoid 54 is urged, the core 52 pushes the rod 41 in the direction of the arrow C ′, and swings the arm head 23 in the direction of the arrow B ′. Thereby, the swing angle of the arm head 23 when the wiper is wiped down is controlled according to the wind pressure, and the error angle θ is kept in the ideal range as shown in FIG.

FIG. 11 shows a second embodiment of the drive mechanism 30 for swinging the arm head 23. The hydraulic actuator 70 includes a support base 71, hydraulic cylinders 72 and 73, a linear solenoid valve 80, and a hydraulic pump 87. And the like. The support base 71 has a disc-like shape similar to the support base 31 (FIG. 7), and is provided with a pivot 21 in a hole formed in the center.
Are vertically penetrated and fixed to the lower part of the pivot 21.

The cylinders 72 and 73 are placed on the support base 71,
In addition, the support base 71 is provided with a small hole 71 communicating with the oil chambers 72a, 73a of the cylinders 72, 73.
a, 71b are provided. Also, cylinders 72 and 7
The third oil chambers 72b and 73b have ports 72c and 73c, respectively.
Is provided. On the other hand, at the lower end of the arm head 23, links 76 and 77 are located below the slits 23e and 23f.
Are rotatably connected to the respective upper ends of the rods 74 and 75 of the cylinders 72 and 73, respectively.

The linear solenoid valve 80 has a casing 81 in which a spool 82 is slidably housed, and solenoids 83 and 84 are housed and fixed at both ends.
The two ends can enter and exit these solenoids 83 and 84 with a slight gap. Also, the spool 82
The return springs 85 and 86 are contracted between both end surfaces of the casing 81 and the opposing end surfaces of the casing 81.
The casing 81 is provided with oil chambers 81A to 81C, and the oil chambers 81A to 81C have ports 81a to 81c, respectively.
However, a port 81d is provided between the oil chambers 81A and 81C, and a port 81e is provided between the oil chambers 81C and 81B.

Port 81 of linear solenoid valve 80
c is connected to the discharge side of a hydraulic pump 87 via an oil passage 90, and the ports 81a and 81b are connected to an oil tank 88 via an oil passage 91. The suction side of the hydraulic pump 87 is connected to the oil tank 88. It is connected. Also, port 81d
Are connected to oil chambers 72b and 73a of the cylinders 72 and 73 via oil paths 92 and 93, and the port 81e is connected to oil chambers 72a and 73b of the cylinders 72 and 73 via oil paths 94 and 95. Incidentally, the oil passages 90 to 95 are constituted by flexible hoses. And the solenoids 83, 8
4 is connected to the control circuit 60.

When the solenoids 83 and 84 are both deenergized, the spool 82 returns to the return spring 85,
86 is held in the neutral position by the spring force of
When the solenoid 3 is energized, it moves to the right in the figure, and when the solenoid 84 is energized, it moves to the left in the figure. Then, the movement amount changes according to the drive current of the solenoids 83 and 84. When the spool 82 is at the neutral position, the oil chamber 81
A, 81B are shut off from oil chamber 81C, and port 81d,
81e is communicated with oil chamber 81C. When the spool 82 moves to the right, the oil chamber 81A is shut off from the oil chamber 81C,
Oil chamber 81B is communicated with oil chamber 81C. When the spool 82 moves to the left, the oil chamber 81B is shut off from the oil chamber 81C as shown, and the oil chamber 81A is communicated with the oil chamber 81C.

When the solenoid 84 of the linear solenoid valve 80 is energized by the control circuit 60 when wiping the wiper blade, the spool 82 moves to the left as shown in the figure. The pressure oil discharged from the hydraulic pump 87 is supplied from the oil passage 90 to the oil chamber 81C, and is passed through the port 81e and the oil passages 94 and 95, so that the oil chambers 72a and
73b. At the same time, the hydraulic oil in the oil chambers 72b and 73a of the cylinders 72 and 73 flows into the oil chamber 81A through the oil passages 92 and 93 and the port 81d, and further the port 81
a, It flows to the oil tank 88 through the oil passage 91. As a result, the rod 74 of the cylinder 72 is pushed up, pushing up the right side of the arm head 23 via the link 76,
The rod 75 of the cylinder 73 is pushed down to pull down the left side of the arm head 23 via the link 77, and the arm head 2 is inclined at a predetermined inclination angle in the direction of arrow B.

The control circuit 60 deenergizes the solenoid 84 after the arm head 23 has obtained a predetermined inclination. When the solenoid 84 is deenergized, the linear solenoid valve 80 returns the spool 82 to the neutral position by the spring force of the return springs 85 and 86, shuts off the oil chambers 81A and 81B from the oil chamber 81C, and sets the ports 81d and 81e communicates with the oil chamber 81C. As a result, the hydraulic pump 8
The oil pressure generated in the oil chamber 72 is supplied from the oil chamber 81C to the oil chamber
b and 73a are dispersedly added to the oil chambers 72a and 73b through the ports 81e and oil paths 94 and 95, and the same oil pressure is applied to these oil chambers 72a, 72b, 73a and 73b, and the rods 74 and 75 are moved. It is stopped and held at this position. As a result, the arm head 23 is held at the inclination angle.

When the solenoid 83 is energized, the spool 82 moves to the right in the drawing, and the arm head 23 swings in the direction of the arrow B ', contrary to the above, to be controlled at a predetermined inclination angle. . Then, when the solenoid 83 is deenergized after the arm head 23 obtains a predetermined inclination, the spool 82 returns to the neutral position, and the rods 74 and 75 are stopped and held at the positions as described above. As a result, the arm head 23 is held at the inclination angle. In this way, the arm head 23 is swung to a predetermined inclination angle in accordance with the rotation of the pivot 21 by the movement of the spool 82 in the left-right direction.

In the above embodiment, the case where the wind pressure applied to the wiper is detected based on the vehicle speed has been described.
However, the present invention is not limited to this, and a wind pressure sensor may be provided to directly detect the wind pressure. However, in the case of control based on the vehicle speed, peripheral devices such as a wind pressure sensor are not required, and there are effects such as simplification of the system and reduction of cost.

Although the hydraulic actuator is used as a drive mechanism for controlling the swing angle of the arm head 23, the present invention is not limited to this, and the drive mechanism may be directly controlled by another, for example, a linear solenoid.

[0039]

According to the present invention as described above, according to the present invention, word
When the wiper arm is in the wiping down direction,
Swing in the direction opposite to the traveling direction, and change the swing angle
Since control is performed so as to increase as the speed signal increases, the inclination angle of the blade rubber can be maintained at an optimum value, and there is an effect that occurrence of wiping failure or the like due to the influence of wind pressure can be prevented. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing a wiper device and a glass surface of a vehicle.

FIG. 2 is a front view of a wiper arm of the wiper device of FIG.

FIG. 3 is a diagram showing a relationship between a wiper blade of the wiper device of FIG. 1 and a glass surface when the wiper blade is wiped.

FIG. 4 is a diagram showing the influence of wind pressure on the wiper blade of FIG. 3;

FIG. 5 is a perspective view of an essential part showing a state in which an arm head of a wiper arm is supported on an upper end of a pivot in the wiper device according to the present invention.

6 is a cross-sectional view taken along a line VI-VI in FIG.

FIG. 7 is a sectional view including a driving mechanism of the arm head of FIG. 6;

FIG. 8 is a flowchart showing a control procedure of the drive mechanism of FIG.

FIG. 9 is a graph showing a relationship between a vehicle speed and a wiper arm swing angle.

FIG. 10 is a diagram showing a state in which the swing angle of the wiper arm is controlled in accordance with the wind pressure by the drive mechanism of FIG. 6, and the error angle is maintained in an ideal range.

FIG. 11 is a configuration diagram showing a second embodiment of the drive mechanism 30 of FIG. 7;

[Explanation of symbols]

 Reference Signs List 20 wiper device 21 pivot 22 flat shaft 23 arm head 26 support mechanism 30, 70 drive mechanism 32, 33, 40, 72, 73 hydraulic cylinder 43, 44, 90-95 oil passage 50 linear solenoid 60 control circuit 61 rotation direction sensor 62 Rotation angle sensor 64 Vehicle speed sensor 80 Linear solenoid valve 81 Casing 82 Spool 87 Hydraulic pump

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yasushi Saeki 5-33-8 Shiba, Minato-ku, Tokyo Inside Mitsubishi Motors Corporation (56) References JP-A-57-209444 (JP, A) JP-A Hei 5-50896 (JP, A) Japanese Utility Model 57-81952 (JP, U) Japanese Utility Model 51-119236 (JP, U) Japanese Utility Model 2-133963 (JP, U) (58) Fields surveyed (Int) .Cl. ⁶ , DB name) B60S 1/08 B60S 1/34

Claims (1)

(57) [Claims] 1. A wiper device for wiping a glass surface by rotating a wiper arm having a base end attached to an upper end of a pivot and having a wiper blade at a distal end by the pivot, the upper end of the pivot and the base end of the wiper arm. And a support mechanism for supporting the wiper arm so as to be relatively non-rotatable with the pivot and swingably in the wiping direction, and between the pivot and a base end of the wiper arm,
A drive mechanism for swinging the wiper arm; and a drive mechanism for wiping the wiper arm in a wiping-down direction.
Control the mechanism to move in the direction opposite to the
Swing the wiper arm and increasing the vehicle speed signal
Control means for increasing the swing angle of the wiper arm in accordance with the condition.