JP6950402B2 - Vehicle wiper device - Google Patents

Description

The present invention relates to a vehicle wiper device.

As a vehicle wiper device installed in a vehicle such as an automobile, a device in which a base end side lever is rotatably connected to the base end side of the arm head and a tip side lever is rotatably connected to the tip end side of the arm head is used. (See, for example, Patent Document 1 and Patent Document 2). In such a vehicle wiper device, by rotating the base end side lever and the tip end side lever, the wiping range can be substantially expanded as compared with the one in which the arm head is simply fixed to the rotating pivot shaft. Can be done.

JP-A-2017-7547 Japanese Unexamined Patent Publication No. 11-227572

By the way, the arm head of such a vehicle wiper device may be arranged between a curved front window (wiping surface) and an opposing curved bonnet at a stop position (storage position), for example. In such a case, it is desired to prevent an excessive gap from the front window or the bonnet.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a vehicle wiper device having good mountability.

The vehicle wiper device that solves the above problems includes an arm head that forms a part of the wiper arm, a base end side lever that is rotatably connected to the base end side of the arm head about the base end side axis, and the arm. A vehicle wiper device provided with a tip side lever rotatably connected to the tip end side of the head about a tip end side shaft , wherein the base end side lever and the tip end side lever are connected below the arm head. The base end side lever and the tip end side lever are each provided with a cover member that extends to the side surrounded by the arm head, the base end side lever, and the tip end side lever and covers the enclosed side. The two cover members are a first cover member extending toward the enclosed side while covering the upper surface of the base end side lever and the upper end of the base end side shaft, and the upper surface of the tip end side lever and the tip end side shaft. It is a second cover member that extends toward the enclosed side while covering the upper end, and at least a part of the second cover member overlaps at least a part of the first cover member, and the overlapping area is the arm head. It has an overlapping portion that changes according to the rotational state, and the lower surface of the arm head is provided with a lower surface side step at an intermediate position between the base end side shaft and the tip end side shaft, and the lower surface side step is provided. The lower surface on the proximal end side is formed lower than the lower surface on the distal end side than the step on the lower surface side, and the lower surface on the proximal end side including the arm head and the proximal end side lever is the arm head and the distal end side. It is formed lower than the lower surface on the tip side including the lever, and the upper surface of the arm head has a step on the upper surface side on the side of the tip side shaft and on the base end side of the tip end side shaft with respect to the step on the lower surface side. The upper surface on the base end side of the step on the upper surface side is formed lower than the upper surface on the tip side than the step on the upper surface side, and the upper surface of the first cover member is formed lower than the upper surface of the second cover member. Was done .

In this structure, the lower surface of the proximal end side including the A Muheddo a proximal end side lever, because it is formed lower than the lower surface of the tip side including the same arm head and the distal end side lever, for example, the stop position ( In the storage position), it is possible to reduce an excessive gap with the curved wiping surface, and the mountability is improved.

According to the same configuration, the upper surface of the first cover member is formed lower than the upper surface of the second cover member, so that, for example, at the stop position (storage position), there is an excessive gap between the curved wiping surface and the bonnet facing the curved wiping surface. Can be reduced and the mountability is improved. Further, this configuration can be easily obtained because the upper surface of the arm head on the base end side is formed lower than the upper surface of the arm head on the tip end side.

According to the same configuration, since the base end side lever and the tip end side lever are connected below the arm head, the appearance from above (outside the vehicle) is better than when they are connected above the arm head. can do.
A the vehicle wiper apparatus, the upper surface side step the upper surface of the base end side than the previous SL arm head is more than the thickness of the cover member than the upper surface of the front end side than the side step the upper surface of the arm head It has been low formation.

According to the same configuration, since at least a part of the two cover members overlap each other vertically and the overlapping area has an overlapping portion that changes according to the rotational state of the arm head, the arm head The shape (area) of the side surrounded by the base end side lever and the tip end side lever can be formed to cover the enclosed side. For example, when the area of the enclosed side is large, the combined area of the two cover members is also large, and when the area of the enclosed side is small, the combined area of the two cover members is also small. It can be made to look good. Further, this configuration can be easily obtained because the upper surface of the arm head on the base end side is formed to be lower than the upper surface of the arm head on the tip end side by a plate thickness of the cover member or more.

According to the vehicle wiper device of the present invention, the mountability can be improved.

The partial schematic diagram of the vehicle provided with the vehicle wiper device in one embodiment. The plan view of the vehicle wiper device in one Embodiment. FIG. 3 is a cross-sectional view around the pivot axis on the first passenger seat side in one embodiment. The plan view for demonstrating the operation of the vehicle wiper device in one Embodiment. The plan view for demonstrating the operation of the vehicle wiper device in one Embodiment. The plan view for demonstrating the operation of the vehicle wiper device in one Embodiment. The plan view for demonstrating the operation of the vehicle wiper device in one Embodiment. Top view of a part of the vehicle wiper device in one embodiment. FIG. 8 is a cross-sectional view taken along the line AA in FIG. A schematic view of a part of the vehicle in one embodiment as viewed from above. The plan view for demonstrating the operation of the vehicle wiper device in one Embodiment. The plan view for demonstrating the operation of the vehicle wiper device in one Embodiment. The plan view for demonstrating the operation of the vehicle wiper device in one Embodiment.

Hereinafter, an embodiment of a vehicle provided with a vehicle wiper device will be described with reference to FIGS. 1 to 13.
As shown in FIG. 1, a vehicle wiper device 2 is arranged below the front window 1 (toward the ground) as a wiping surface of the vehicle. The front window 1 has a black ceramic area 1a (shaded portion in FIG. 1) colored black on its edge.

As shown in FIGS. 2 and 4 to 7, the vehicle wiper device 2 includes a substantially plate-shaped frame 3 and a first holder portion 4 provided on one side (left side in the drawing) of the frame 3 in the vehicle width direction. A pipe frame 5 having one end fixed to the frame 3 so as to extend in the opposite direction to the other side in the vehicle width direction (right side in the figure), and a second holder fixed to the other end of the pipe frame 5. It includes a member 6. Then, the vehicle wiper device 2 is formed so that the support portion 3a provided at the center of the frame 3 in the vehicle width direction is supported by the vehicle and one end portion of the frame 3 in the vehicle width direction (the tip of the first holder portion 4). The fixing portion 6a formed on the fixing portion 3b and the second holder member 6 is fastened to the vehicle to be fixed to the vehicle (the vehicle body thereof).

Further, the vehicle wiper device 2 includes a first motor 11 as a first drive source fixed to the back surface of the frame 3 (a surface on the inner side of the vehicle) and a second motor 12 as a second drive source.
The rotating shaft 11a of the first motor 11 penetrates the frame 3 and protrudes from the surface of the frame 3 (the surface on the outer side of the vehicle), and the tip end portion of the rotating shaft 11a is the base end portion of the first drive crank arm 13. Is fixed. Further, the rotating shaft 12a of the second motor 12 penetrates the frame 3 and protrudes from the surface of the frame 3 (the surface on the outer side of the vehicle), and the tip of the rotating shaft 12a is the base of the second drive crank arm 14. The ends are fixed.

The first motor 11 and the second motor 12 are motors in which the rotation shafts 11a and 12a are controlled so as to be able to rotate (rotate) in the forward and reverse directions in an angle range of less than one rotation, and the rotation speed thereof can also be controlled. Brushed DC motor or brushless motor). Further, the first motor 11 and the second motor 12 each have a magnetic sensor (magnetic resistance element or the like) inside, and the magnetic sensor is fixed to, for example, a worm wheel that rotates integrally with the rotating shafts 11a and 12a. By sensing the magnetism of the sensor magnet, it is possible to output a rotation position signal corresponding to the rotation position (rotation angle) of the rotation shafts 11a and 12a.

The driver's seat side pivot shaft 15 is rotatably supported by the first holder portion 4, and the driver's seat is rotatably supported at the base end of the driver's seat side pivot shaft 15 (in FIG. 2, the end on the back side of the paper). The side swing lever 16 is fixed, and the second wiper arm 17 (its arm head) on the driver's side is fixed to the tip of the pivot shaft 15 on the driver's side (the end on the front side of the paper in FIG. 2). There is. As shown in FIG. 1, a second wiper blade 18 for wiping the driver's seat side of the front window 1 is connected to the tip end portion of the second wiper arm 17.

The tip of the first drive crank arm 13 and the driver's seat side swing lever 16 are connected by a first connecting rod 19. As a result, when the first motor 11 is driven, the first drive crank arm 13 rotates, and the power thereof is transmitted to the driver's seat side swing lever 16 via the first connecting rod 19, and the driver's seat side. The swing lever 16 swings, and the second wiper arm 17 swings (rotates and drives on a constant axis with respect to the vehicle) together with the driver's seat side swing lever 16. Then, the range between the upside-down position and the downside-up position on the driver's side of the front window 1 is wiped back and forth by the second wiper blade 18. In addition, in FIG. 1, the normal wiping range H1 by the second wiper blade 18 is illustrated by a alternate long and short dash line.

Further, as shown in FIG. 3, the first passenger seat side pivot shaft 21 is rotatably supported by the second holder member 6 about the first axis L1 and the second passenger seat side pivot shaft 22. Is rotatably supported around the second axis L2. In the present embodiment, the first axis L1 and the second axis L2 are arranged on the same straight line L (concentrically).

Specifically, the second holder member 6 is formed with a cylindrical portion 6b, and the first passenger seat side pivot shaft 21 is rotatably supported on the inner peripheral side thereof via a bearing 23. The first passenger seat side pivot shaft 21 is formed in a cylindrical shape, and the second passenger seat side pivot shaft 22 is rotatably supported on the inner peripheral side thereof via a bearing 24. As a result, the first axis L1 of the first passenger seat side pivot shaft 21 and the second axis L2 of the second passenger seat side pivot shaft 22 are at constant positions (immovable positions) with respect to the vehicle body, and are the same. It is arranged on a straight line L. The outer bearing 23 of the present embodiment is a ball bearing, and the inner bearing 24 is a sintered metal oil-impregnated bearing.

The first passenger seat side swing lever 25 is fixed to the base end portion of the first passenger seat side pivot shaft 21, and the first drive lever 26 is fixed to the tip end portion of the first passenger seat side pivot shaft 21. Has been done. Then, as shown in FIG. 2, the tip end portion of the first drive crank arm 13 and the first passenger seat side swing lever 25 are driven and connected by a second connecting rod 27. As a result, when the first motor 11 is driven, the first drive crank arm 13 rotates, and the power thereof is transmitted to the first passenger seat side swing lever 25 via the second connecting rod 27. The first passenger seat side swing lever 25 swings, and the first drive lever 26 swings (rotates) around the first axis L1 together with the first passenger seat side swing lever 25.

Further, as shown in FIG. 3, the second passenger seat side pivot shaft 22 is formed longer than the first passenger seat side pivot shaft 21, and the base end portion and the tip end portion thereof are formed to be longer than the first passenger seat side pivot shaft 21. A second passenger seat side swing lever 28 is fixed to the base end portion thereof, and a second drive lever 29 as a tip end side lever is fixed to the tip end portion of the second passenger seat side pivot shaft 22. Is fixed.

The tip of the second drive crank arm 14 and the second passenger seat side swing lever 28 are connected by a third connecting rod 31. As a result, when the second motor 12 is driven, the second drive crank arm 14 rotates, and the power thereof is transmitted to the second passenger seat side swing lever 28 via the third connecting rod 31 to the second. 2 The passenger seat side swing lever 28 swings, and the second drive lever 29 swings (rotates) together with the second passenger seat side swing lever 28. The first passenger seat side pivot shaft 21 and the second passenger seat side pivot shaft 22 are not interlocked with each other. In other words, the first passenger-side pivot shaft 21 and the second passenger-side pivot shaft 22 are arranged on the same straight line L, but their rotational movements are independent of each other.

Further, as shown in FIGS. 2 and 4 to 7, the vehicle wiper device 2 is a group in which the base end side is rotatably connected about the third axis L3 on the tip end side of the first drive lever 26. A first driven lever 32 as an end side lever is provided.

Further, the vehicle wiper device 2 is rotatably connected to the base end side about the fourth axis L4 on the tip end side of the first driven lever 32, and is connected to the tip end side of the second drive lever 29. An arm head 33 whose tip side is rotatably connected with the 5-axis line L5 as the center (swing center axis) is provided. As shown in FIG. 1, the arm head 33 constitutes a first wiper arm 35 together with a retainer 34 and the like connected to the tip portion thereof, and the passenger seat side of the front window 1 is wiped off from the tip portion of the first wiper arm 35. The first wiper blade 36 for the window is connected.

The first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33 have a length from the first axis L1 (the second axis L2) to the third axis L3 and the above. The lengths from the 4th axis L4 to the 5th axis L5 are set to be the same and connected. Further, the first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33 have a length from the third axis L3 to the fourth axis L4 and the first axis L1 ( The lengths from the second axis L2) to the fifth axis L5 are set to be the same and connected. That is, they are parallelogram-shaped link mechanisms in which the first drive lever 26 and the arm head 33 are kept parallel, and the second drive lever 29 and the first driven lever 32 are kept parallel. In this embodiment, the first drive lever 26, the first driven lever 32, and the arm head 33 are driven by the driving force of the first motor 11 to reciprocate and swing the first wiper arm 35. doing. Further, in the present embodiment, the second drive lever 29 is a telescopic mechanism that is driven by the driving force of the second motor 12 to expand and contract the first wiper arm 35 in the longitudinal direction thereof, and is a swing center of the first wiper arm 35. It constitutes an axis moving mechanism for moving the axis (fifth axis L5) in the vertical direction of the front window 1.

From the above configuration, when the first drive lever 26 is rotated by the driving force of the first motor 11 and the wiping operation is performed by the first wiper blade 36, the vehicle wiper device 2 sets the second drive lever 29. By rotating with the driving force of the two motors 12 and moving the fifth axis L5 on the tip side of the second drive lever 29 to the upper side of the front window 1, the wiping range by the first wiper blade 36 is substantially expanded. It is possible to expand (variable).

Then, as shown in FIG. 1, the vehicle wiper device 2 of the present embodiment has the fifth axis L5 as a reference position when the first wiper blade 36 is in the downward inverted position on the front window 1. Reference drive with the wiping range by the first wiper blade 36 in the state where the axis L5 is in the reference position as the reference range Z1, and the first wiper by moving the fifth axis L5 to the upper side of the front window 1 from the reference position. A control unit 41 that drives and controls the first motor 11 and the second motor 12 is provided so as to be able to switch between an expansion drive in which the wiping range by the blade 36 is an expansion range Z2 that is expanded from the reference range Z1. I have. The control unit 41 is electrically connected to the first motor 11 and the second motor 12, respectively, and has a rotation position signal (drive) corresponding to the rotation positions (rotation angles) of the rotation shafts 11a and 12a input from them. The first motor 11 and the second motor 12 are driven and controlled based on the state signal). Specifically, when the position of the fifth axis L5 when the first wiper blade is in the downward inverted position is set as the reference position, the control unit 41 drives and controls the first motor 11 in the reference drive (at this time, the first). The reference range Z1 is wiped by the first wiper blade 36 in a state where the fifth axis L5 is in the reference position (positions of FIGS. 2 and 7). In other words, in the reference drive, the control unit 41 does not swing (rotate) the second drive lever 29 around the second axis L2 (does not drive the expansion / contraction mechanism (axis movement mechanism)), and the fifth axis line. While keeping L5 in the reference position (only the swing mechanism is driven), the reference range Z1 is wiped by the first wiper blade 36. On the other hand, in the expansion drive, the control unit 41 drives and controls the first motor 11 and the second motor 12 (driving the expansion / contraction mechanism (axis movement mechanism) and the swing mechanism) to drive the second drive lever 29. The fifth axis L5 on the tip side is moved (or moved) above the front window 1 from the reference position (see FIGS. 1, 4 to 6), and the reference is provided by the first wiper blade 36. The expansion range Z2, which is expanded beyond the range Z1, is wiped out.

Further, the control unit 41 of the present embodiment normally moves when the first wiper blade 36 moves forward (when it moves from a stop position or a lower reverse position to an upper reverse position along the lower end of the front window 1) and returns. The second motor 12 is driven and controlled so that the expansion drive is performed at the time (when moving from the upper reverse position to the stop position or the lower reverse position). In the expansion drive, the control unit 41 rotates the first drive lever 26 by the driving force of the first motor 11 to move (rotate) the first wiper blade 36, and at the same time, the first wiper blade 36 is moved (rotated). The two motors 12 are driven and controlled so that the first wiper blade 36 wipes the front window 1 to a position close to the upper corner. That is, when the control unit 41 moves the first wiper blade 36 to a position corresponding to the upper corner of the front window 1 based on the rotation position signals from the first motor 11 and the second motor 12, the second wiper blade 36 is second. The second motor 12 is driven and controlled so that the fifth axis L5, which is located on the tip end side of the drive lever 29 and is the center of rotation of the first wiper blade 36, approaches the corner side.

Here, as shown in FIGS. 8 and 9, in the present embodiment, the upper surface 33a on the proximal end side of the arm head 33 is formed lower than the upper surface 33b on the distal end side of the arm head 33. Further, the lower surface 33c on the base end side of the arm head 33 is formed lower than the lower surface 33d on the tip end side of the arm head 33.

Specifically, as shown in FIG. 9, the arm head 33 first has a proximal end side hole 33e penetrating vertically on the proximal end side thereof, and the proximal end side shaft 51 inserted through the proximal end side hole 33e. The first driven lever 32 is connected to the lower end side of the above. Further, the arm head 33 has a tip side hole 33f penetrating up and down at an intermediate position in the longitudinal direction on the tip side of the base end side hole 33e, and the tip side shaft inserted into the tip end side hole 33f. The second drive lever 29 is connected to the lower end side of the 52. In the arm head 33, a step 33g is provided on the upper surface of the tip side hole 33f on the immediate base end side, and the upper surface 33a on the base end side of the step 33g is formed lower than the upper surface 33b on the tip end side. There is. Further, in the arm head 33, a step 33h is provided on the lower surface at an intermediate position between the proximal end side hole 33e and the distal end side hole 33f, and the lower surface 33c on the proximal end side of the step 33h is from the lower surface 33d on the distal end side. Is also formed low. In the present embodiment, the lower surface 33c on the proximal end side of the arm head 33 is formed lower than the lower surface 33d on the distal end side of the arm head 33, so that the first driven lever 32 on the proximal end side of the arm head 33 is formed. The lower surface of the arm head 33 is formed lower than the lower surface of the second drive lever 29 on the tip end side of the arm head 33.

Further, as shown in FIGS. 11 to 13, the first driven lever 32 and the second drive lever 29 are on the side surrounded by the arm head 33, the first driven lever 32, and the second drive lever 29. First and second cover members 53, 54 that extend and cover the enclosed side are provided. The first cover member 53 is fixed to the fixing hole 32a (see FIG. 8) formed in the first driven lever 32, and the second cover member 54 is fixed to the fixing hole 29a formed in the second drive lever 29. It is fixed.

The first cover member 53 extends to the enclosed side while covering the entire upper surface of the first driven lever 32 and a part of the upper surface 33a on the proximal end side of the arm head 33 (including the proximal end side hole 33e). It has a part 53a. Further, the second cover member 54 extends to the enclosed side while covering the entire upper surface of the second drive lever 29 and a part of the upper surface 33b on the tip end side of the arm head 33 (including the tip end side hole 33f). It has a part 54a. The upper surface of the first cover member 53 is formed lower than the upper surface of the second cover member 54. Further, as shown in FIG. 9, the upper surface 33a on the base end side of the arm head 33 is formed to be lower than the upper surface 33b on the tip end side of the arm head 33 to be lower than the plate thickness of the first cover member 53. Further, in the present embodiment, the extending portions 53a and 54a overlap each other vertically and form a part of the overlapping portion whose overlapping area changes according to the rotational state of the arm head 33. Further, in the present embodiment, the first and second cover members 53 and 54 are always (in all states where the arm head 33 moves from the lower inverted position to the upper inverted position (see FIGS. 11 to 13)). It is formed so as to cover the entire range surrounded by the 33, the first driven lever 32, the second drive lever 29, and the first drive lever 26 (so that there is no gap between the upper and lower parts). This prevents any foreign matter from being caught in the enclosed area.

Next, the operation of the vehicle wiper device 2 configured as described above will be described.
Since the second wiper arm 17 and the second wiper blade 18 simply rotate (swing) around the driver's seat side pivot shaft 15 when the first motor 11 is driven, here. , The movement of the first wiper arm 35 and the first wiper blade 36 side will be described in detail.

For example, as shown in FIG. 2, when the washer switch provided in the driver's seat is operated while the first wiper arm 35 (and the first wiper blade 36) is in the stop position (lower inverted position), the said The first motor 11 is driven by the control unit 41, and the first drive lever 26 is rotated by the driving force. Then, at this time, the second motor 12 is also driven by the control unit 41, and the expansion operation is performed.

At this time, as shown in FIG. 4, the first drive lever 26 is rotated until the first wiper arm 35 (and the first wiper blade 36) is moved about 1/4 between the upside down positions. The second drive lever 29 is also rotated so that the fifth axis L5 is moved to the upper side of the front window 1. As a result, the tip of the first wiper blade 36 (see FIG. 1) is moved upward along the widthwise end of the front window 1 to wipe the front window 1.

Then, as shown in FIG. 5, the first wiper arm 35 (and the first wiper blade 36) is moved forward by about half between the upside down positions by further rotation of the first drive lever 26. The second drive lever 29 is also rotated so that the 5-axis line L5 is further moved upward. As a result, as shown in FIG. 1, the tip end portion of the first wiper blade 36 is moved to a position close to the upper corner of the front window 1 to wipe the front window 1.

Then, as shown in FIG. 6, until the first drive lever 26 is further rotated and the first wiper arm 35 (and the first wiper blade 36) is moved back and forth between the upside down positions by about 3/4. The second drive lever 29 is also rotated (in the opposite direction) so that the fifth axis L5 is moved to the lower side of the front window 1. As a result, the tip of the first wiper blade 36 (see FIG. 1) is moved in the width direction (leftward in FIG. 1) substantially along the upper end of the front window 1 to wipe the front window 1.

Then, as shown in FIG. 7, the fifth axis L5 is further lowered until the first drive lever 26 is further rotated and the first wiper arm 35 (and the first wiper blade 36) finishes moving forward. The second drive lever 29 is also rotated (in the opposite direction) so as to be moved to the reference position. As a result, the front window 1 is wiped out of the enlarged range Z2 by the first wiper blade 36 (see FIG. 1).

Then, at the time of recovery, the expansion range Z2 is wiped off by the first wiper blade 36 (see FIG. 1) due to the movement opposite to the above-mentioned forward movement.
Next, the effects of the above embodiment will be described below.

(1) As schematically shown in FIG. 10, the upper surface 33a on the base end side of the arm head 33 is formed lower than the upper surface 33b on the tip end side of the arm head 33, so that, for example, the stop position (storage position). ), The excessive gap between the curved front window 1 and the curved bonnet B facing the curved front window 1 can be reduced, and the mountability is improved. Further, since the lower surface 33c on the base end side of the arm head 33 is formed lower than the lower surface 33d on the tip end side of the arm head 33 (specifically, the lower surface of the first driven lever 32 is the lower surface of the second drive lever 29). Therefore, for example, at the stop position (storage position), an excessive gap with the curved front window 1 can be reduced, and the mountability is improved. In other words, since a step 33g is provided between the upper surface 33a on the base end side and the upper surface 33b on the tip end side of the arm head 33, for example, it is arranged along the curvature of the bonnet B at the stop position (storage position). And the mountability is good. Further, since the step 33h is provided between the lower surface 33c on the base end side of the arm head 33 and the lower surface 33d on the tip end side, for example, it is arranged along the curvature of the front window 1 at the stop position (storage position). And the mountability is good.

(2) Since the upper surface of the first cover member 53 that covers the upper surface 33a on the base end side of the arm head 33 is formed lower than the upper surface of the second cover member 54 that covers the upper surface 33b on the tip end side of the arm head 33. For example, at the stop position (storage position), an excessive gap with the curved bonnet B can be reduced, and the mountability is improved. Further, this configuration can be easily obtained because the upper surface 33a on the proximal end side of the arm head 33 is formed lower than the upper surface 33b on the distal end side of the arm head 33.

(3) The first and second cover members 53 and 54 have overlapping portions (extended portions 53a and 54a) in which a part of the first and second cover members 53 and 54 overlap each other vertically and the overlapping area changes according to the rotational state of the arm head 33. Since the arm head 33, the first driven lever 32, and the second drive lever 29 have a shape (area) suitable for the shape (area) of the side surrounded by the arm head 33, the enclosed side can be covered. For example, in a state where the area of the enclosed side is large (see FIG. 13), the combined area of the first and second cover members 53 and 54 is also large, and the area of the enclosed side is small (FIG. 13). In (see 11), the combined area of the first and second cover members 53 and 54 can also be reduced, and the appearance can be improved. Further, this configuration can be easily obtained because the upper surface 33a on the base end side of the arm head 33 is formed to be lower than the upper surface 33b on the tip end side of the arm head 33 to be equal to or larger than the plate thickness of the first cover member 53. Can be done.

The above embodiment may be modified as follows.
In the above embodiment, the upper surface 33a on the proximal end side of the arm head 33 is formed lower than the upper surface 33b on the distal end side, and the lower surface 33c on the proximal end side of the arm head 33 is lower than the lower surface 33d on the distal end side. Although it is formed low, only one of them may be configured. For example, the lower surface of the arm head 33 may have a shape that does not have a step 33h. Further, for example, the upper surface of the arm head 33 may have a shape that does not have a step 33g.

-In the above embodiment, the first driven lever 32 and the second drive lever 29 are connected below the arm head 33, but the present invention is not limited to this, and the first driven lever 32 and the second drive lever 29 may be connected above the arm head 33. good.

In the above embodiment, the lower surface 33c on the base end side of the arm head 33 is formed lower than the lower surface 33d on the tip end side so that the lower surface of the first driven lever 32 connected downward is lower than the lower surface of the second drive lever 29. However, the lower surface of the arm head 33 does not have a step 33h, and the lower surface of the arm head 33 may be made lower than the lower surface of the second drive lever 29 by making the first driven lever 32 thicker. Of course, even when the first driven lever 32 and the second drive lever 29 are connected above the arm head 33, the upper surface of the arm head 33 does not have a step 33 g, and the first driven lever 32 is thinned. Therefore, the upper surface thereof may be lower than the upper surface of the second drive lever 29. That is, the upper surface on the proximal end side (of the arm head 33 of the member in which they are combined) including the arm head 33 and the first driven lever 32 includes the arm head 33 and the second drive lever 29 (combining them). It suffices if it is formed lower than the upper surface on the tip side (of the arm head 33 of the member). Further, the lower surface of the base end side including the arm head 33 and the first driven lever 32 (of the arm head 33 of the member in which they are combined) includes the arm head 33 and the second drive lever 29 (combined them). It suffices if it is formed lower than the lower surface on the tip side (of the arm head 33 of the member).

-In the above embodiment, the configuration includes the first and second cover members 53 and 54, but the present invention is not limited to this, and the configuration may not include the first and second cover members 53 and 54. In this case, since the first driven lever 32 (base end side lever) and the second drive lever 29 (tip side lever) are connected below the arm head 33, compared with the case where they are connected above the arm head 33. Therefore, the appearance from above (outside the vehicle) can be improved.

-In the above embodiment, the control unit 41 drives and controls the first motor 11 and the second motor 12 so that the same expansion drive is performed during the forward movement and the reverse movement in the normal state, but the present invention is limited to this. However, for example, different controls may be performed during the forward movement and the reverse movement. Further, the drive control different from the above-described embodiment (enlarged drive) may be performed at times other than the normal time such as when snow is accumulated.

In the above embodiment, the first axis L1 of the first drive lever 26 and the second axis L2 of the second drive lever 29 are arranged on the same straight line L, but the present invention is not limited to this, and for example, the first 1 The first axis L1 of the drive lever and the second axis L2 of the second drive lever may be arranged at positions where they are displaced from each other.

The control unit 41 that drives and controls the first motor 11 and the second motor 12 of the above embodiment may be mounted as an ECU on the vehicle side, or at least one of the first motor 11 and the second motor 12, for example. It may be a control unit mounted on the second motor 12.

2 ... Vehicle wiper device, 29 ... Second drive lever (tip side lever), 32 ... First driven lever (base end side lever), 33 ... Arm head, 33a ... Base end side upper surface, 33b ... Tip side upper surface , 33c ... Lower surface on the proximal end side, 33d ... Lower surface on the distal end side, 35 ... First wiper arm (wiper arm), 53, 54 ... First and second cover members (cover member), 53a, 54a ... Part of the overlapping portion Extension part that composes.

Claims (2)

The arm head that forms part of the wiper arm and
A base end side lever rotatably connected to the base end side of the arm head about the base end side axis,
A vehicle wiper device provided with a tip-side lever rotatably connected to the tip-end side of the arm head about a tip-side shaft.
The base end side lever and the tip end side lever are connected below the arm head.
The base end side lever and the tip end side lever are each provided with a cover member that extends to the side surrounded by the arm head, the base end side lever, and the tip end side lever and covers the enclosed side.
The two cover members include a first cover member extending toward the enclosed side while covering the upper surface of the proximal end side lever and the upper end of the proximal end side shaft, and the upper surface of the distal end side lever and the upper end of the distal end side shaft. It is a second cover member extending to the enclosed side while covering the arm head, and at least a part of the second cover member overlaps at least a part of the first cover member, and the overlapping area is the rotation of the arm head. It has an overlapping part that changes according to the moving state, and has an overlapping part.
The lower surface of the arm head is provided with a lower surface side step at an intermediate position between the base end side shaft and the tip end side shaft, and the lower surface on the base end side of the lower surface side step is on the tip side of the lower surface side step. The lower surface of the proximal end side including the arm head and the proximal end side lever is formed lower than the lower surface of the distal end side including the arm head and the distal end side lever .
The upper surface of the arm head is provided with an upper surface side step on the distal end side shaft side of the lower surface side step and on the proximal end side of the distal end side shaft, and the upper surface on the proximal end side of the upper surface side step. Is a vehicle wiper device, characterized in that is formed lower than the upper surface on the tip side of the step on the upper surface side, and the upper surface of the first cover member is formed lower than the upper surface of the second cover member. The vehicle wiper device according to claim 1.
The upper surface side step the upper surface of the base end side than the previous SL arm head and characterized in that than the upper surface of the front end side than the side step the upper surface of the arm head is formed lower than the thickness of the cover member Vehicle wiper device.

Images