JP2021079781A - Wiper device - Google Patents

Abstract

To provide a wiper device which can reduce insufficient wiping.SOLUTION: A wiper device 1 includes: a first link 31 which has one end connected to a wiper blade 10; a second link 32 which is arranged side by side with the first link 31 and has one end connected to the wiper blade 10; a pivot 37 which is provided between both ends of the first link 31; a support link 33 which has one end connected to the pivot 37 and the other end connected to the other end of the second link 32; a third link 34 which has one end connected to the pivot 37 and the other end connected to a vehicle body; a fourth link 35 which has one end connected to the other end of the second link 32 and the other end connected to the vehicle body on the other side in a first direction D1 closer than the third link 34; and a fifth link 36 which has one end connected to the other end of the first link 31 and the other end connected to an output shaft of a motor 3.SELECTED DRAWING: Figure 1

Description

The present invention relates to a wiper device.

The wiper device wipes out raindrops adhering to the glass surface such as windshield glass or a mirror in order to secure the driver's field of vision.
In order to expand the wiping area for the glass surface, a crank whose base end side is rotatably supported with respect to the vehicle body, an electric motor that rotationally drives the crank, and a wiper arm that is rotatably connected to the tip side of the crank. An automobile wiper having a wiper blade attached to a wiper arm and a wiper blade has been proposed.

Japanese Unexamined Patent Publication No. 2012-20625

By the way, in recent years, the number of vehicles equipped with sensors and cameras inside the windshield glass is increasing due to the demand for automatic driving. Sensors and the like mounted inside the windshield glass may be hindered by dirt and water droplets adhering to the outside of the windshield glass. Therefore, there is a demand for a wiper device that can satisfactorily remove dirt and water droplets adhering to the windshield glass. In order to wipe off dirt and water droplets well, it is necessary to wipe the surface to be wiped evenly. However, in the above-mentioned conventional technique, since the wiping speed and the sliding resistance are different at each part of the wiper blade, wiping failure occurs in which uneven wiping occurs at each part of the wiped surface.

Therefore, the present invention provides a wiper device capable of reducing wiping defects.

In order to solve the above problems, the wiper device according to the present invention is a wiper device that is driven by a motor and wipes the windshield glass of the vehicle, and is a first wiper device from a stop position along the surface of the windshield glass. A wiper blade that reciprocates in a direction and is formed in a long shape along a second direction orthogonal to the first direction, and one end of the wiper blade in the first direction rather than a central portion in the first direction. A first link rotatably connected to the wiper blade on one side and arranged side by side with the first link, one end of which is rotatable to the wiper blade on the other side of the first direction with respect to the first link. A second link connected to the above, a pivot provided between both ends of the first link, one end rotatably connected to the pivot, and the other end rotatably connected to the other end of the second link. A connected support link, a third link having one end rotatably connected to the pivot and the other end rotatably connected to the vehicle body, and one end rotatably connected to the other end of the second link. The other end is rotatably connected to the vehicle body on the other side of the first direction from the third link, and one end is rotatably connected to the other end of the first link, and the other end is rotatably connected. It is characterized by including a fifth link connected to the output shaft of the motor.

In the above configuration, the first dimension between the pivot, the third link, and the first connecting point of the vehicle body is s1, and the first connecting point, the motor, and the fifth link are the first. The second dimension between the two connecting points is s2, and the third dimension between the second connecting point and the third connecting point between the fifth link and the first link is s3. Assuming that the fourth dimension between the third connection point and the pivot is s4, s1: s2: s3: s4 may satisfy 2.5: 2: 1: 2.5.

In the above configuration, when the fifth dimension between the pivot and the fourth connection point between the wiper blade and the first link is s5, s1: s2: s3: s4: s5 is 2.5. : 2: 1: 2.5: 2.5 may be satisfied.

In the above configuration, the first virtual straight line connecting the first connection point, the fifth connection point between the vehicle body and the fourth link, the pivot, and the fourth link and the second link. Even if the second virtual straight line connecting the six connection points, the fourth connection point, and the third virtual straight line connecting the second link and the seventh connection point of the wiper blade are parallel to each other. Good.

The third link is formed in a substantially L shape having a bent portion, and the bent portion of the third link is the pivot when viewed from the first direction and the third direction orthogonal to the second direction. It is arranged in a region on the side of the third connection point with respect to the fourth virtual straight line connecting the first connection point and the first connection point, and the fourth link is formed in a substantially L shape having a bent portion and is formed in a substantially L shape. When viewed from the third direction, the bent portion of the fourth link is arranged in a region closer to the third connecting point than the fifth virtual straight line connecting the fifth connecting point and the sixth connecting point. May be good.

According to the present invention, it is possible to provide a wiper device capable of reducing wiping defects.

It is external view at the stop position of the wiper device attached to the windshield of the vehicle body which concerns on this embodiment. It is a perspective view of the wiper device which concerns on this embodiment. It is an enlarged perspective view which shows the part III of FIG. It is a top view of the wiper device which concerns on this embodiment. It is an enlarged perspective view which shows the V part of FIG. It is an external view of the wiper device attached to the windshield of the vehicle body which concerns on this embodiment while driving a motor. It is an external view in the inverted position of the wiper device attached to the windshield of the vehicle body which concerns on this embodiment. It is an enlarged perspective view which shows the VIII part of FIG.

(Wiper device)
Embodiments of the present invention will be described with reference to the drawings.
In the following description, unless otherwise specified, the front-rear direction is the front-rear direction along the traveling direction of the vehicle, the up-down direction is the up-down direction of the vehicle, and the left-right direction is the left-right when the front glass is viewed from the front of the vehicle. It shall point in the direction.
FIG. 1 is an external view of a wiper device 1 attached to a windshield 2 (an example of the “windshield glass” of the claim) of a vehicle body (not shown) according to the present embodiment at a stop position A.
As shown in FIG. 1, the windshield 2 is provided in front of the vehicle body of the automobile. The windshield 2 is formed in a rectangular plate shape in a plan view.
The wiper device 1 is provided on a vehicle body of an automobile or the like. The wiper device 1 wipes off dirt, water droplets, and the like adhering to the windshield 2 to secure the visibility of the occupant.

The wiper device 1 includes a wiper blade 10 for wiping the windshield 2, a link mechanism 30 connected to the wiper blade 10, and a motor 3 for transmitting a driving force to the link mechanism 30 to move the wiper blade 10. There is.

The wiper blade 10 is arranged along the right outer edge portion 2a of the windshield 2 before being moved by the driving force of the motor 3. The wiper blade 10 reciprocates from the right outer edge portion 2a of the windshield 2 to the left outer edge portion 2b.
In the following description, the position where the wiper blade 10 is arranged along the right outer edge portion 2a is defined as the stop position A. The position where the wiper blade 10 is arranged along the left outer edge portion 2b is defined as the inverted position B.
The direction in which the wiper blade 10 reciprocates is defined as the first direction D1. The direction along the surface of the windshield 2 and orthogonal to the first direction D1 is defined as the second direction D2. The direction orthogonal to the first direction D1 and the second direction D2 is defined as the third direction D3.

The wiper blade 10 is formed in an elongated shape along the surface of the windshield 2 and along the second direction D2. The length of the wiper blade 10 in the second direction D2 is slightly shorter than the length of the windshield 2 in the second direction D2.
FIG. 2 is a perspective view of the wiper device 1 according to the present embodiment.
As shown in FIG. 2, the wiper blade 10 includes a blade portion 11 extending along the second direction D2 and wiping the windshield 2, and an arm portion 12 connected to an intermediate portion of the blade portion 11 in the second direction D2. ,have.

The blade portion 11 wipes the windshield 2. The blade portion 11 includes a support plate 11a extending along the first direction D1 and a rubber (not shown) provided on the surface of the support plate 11a on the windshield 2 side. The support plate 11a is a long plate-shaped member. The rubber is in close contact with the windshield 2.
As shown in FIG. 1, the arm portion 12 is provided on the side opposite to the windshield 2 with the blade portion 11 interposed therebetween. The arm portion 12 has a blade connecting portion 13 and an arm main body portion 14.

FIG. 3 is an enlarged perspective view showing a part III of FIG.
As shown in FIG. 3, the blade connecting portion 13 includes a holding portion 15 that sandwiches and holds the blade portion 11 from both sides of the first direction D1, a pair of connecting shaft support walls 17 that are erected from the holding portion 15. It has an arm main body connecting shaft 16 provided between a pair of connecting shaft support walls 17.

The holding portion 15 extends along the blade portion 11. The cross-sectional shape of the holding portion 15 is formed so as to have a U shape that opens toward the blade portion 11.
The connecting shaft support wall 17 is erected from the holding portion 15 toward the side opposite to the blade portion 11. A pair of connecting shaft support walls 17 are provided on both sides of the blade portion 11 in the width direction so as to be separated from each other.
The arm main body connecting shaft 16 is separated from the holding portion 15. The arm main body connecting shaft 16 extends along the width direction of the blade 11. The arm main body connecting shaft 16 is integrally formed with the holding portion 15 and the connecting shaft support wall 17.

The arm body portion 14 includes a rod-shaped portion 18 extending along the blade portion 11 and a pair of link connecting portions 20a, 20b (first link connecting portion 20a, 20b) protruding from the lower end of the rod-shaped portion 18 to both sides in the width direction of the blade portion 11. It is formed in a T shape as a whole by the second link connecting portion 20b).
An arm body connecting shaft 16 is inserted into a hole provided at the upper end of the rod-shaped portion 18. As a result, the blade portion 11 is rotatably supported with respect to the arm main body portion 14.
Of the pair of link connecting portions 20a and 20b, the first link connecting portion 20a is provided on the right side (left side in FIG. 3) of the rod-shaped portion 18. Of the pair of link connecting portions 20a and 20b, the second link connecting portion 20b is provided on the left side (right side in FIG. 3) of the rod-shaped portion 18.

(Link mechanism)
As shown in FIG. 1, the link mechanism 30 includes a first link 31 connected to the wiper blade 10, a second link 32 arranged alongside the first link 31 and connected to the wiper blade 10, and a first link. The support link 33 that connects 31 and the second link 32, the third link 34 that connects the vehicle body and the first link 31, the fourth link 35 that connects the vehicle body and the second link 32, and the motor 3. It has a fifth link 36 that connects the first link 31 and the like.

The first link 31 is formed in a straight line. The upper end of the first link 31 is rotatably connected to the wiper blade 10 on the right side of the first direction D1 with respect to the central portion of the wiper blade 10 in the first direction D1. Specifically, the upper end of the first link 31 is rotatably connected to the link connecting portion 20a of the wiper blade 10 at the fourth connecting point 41.
The second link 32 is formed in a straight line. The second link 32 is arranged parallel to the first link 31. The upper end of the second link 32 is rotatably connected to the second link connecting portion 20b at the seventh connecting point 44.

The support link 33 is formed in a straight line. The support link 33 is arranged along the first direction D1. The right end of the support link 33 is rotatably connected to a pivot 37 provided between both ends of the first link 31. The left end of the support link 33 is rotatably connected to the lower end of the second link 32 at the sixth connection point 43.
The third link 34 includes a bent portion 34a and is formed in a substantially L shape when viewed from the third direction D3. The upper end of the third link 34 is rotatably connected to the pivot 37. The lower end of the third link 34 is rotatably connected to a mounting portion 4 of the vehicle body, which will be described later, at a first connecting point 38.

The fourth link 35 includes a bent portion 35a and is formed in a substantially L shape when viewed from the third direction D3. The fourth link 35 is arranged along the third link 34. The upper end of the fourth link 35 is rotatably connected to the lower end of the second link 32 and the left end of the support link 33 at the sixth connection point 43. The lower end of the fourth link 35 is rotatably connected to the mounting portion 4 of the vehicle body on the left side of the third link 34 at the fifth connecting point 42.
The fourth link 35 is arranged along the third link 34 at the stop position A.
The fifth link 36 is formed in a straight line. One end of the fifth link 36 is rotatably connected to the lower end of the first link 31 at a third connecting point 40. The other end of the fifth link 36, which is not connected to the first link 31, is connected to the output shaft (not shown) of the motor 3 at the second connection point 39. The fifth link 36 is arranged linearly with the first link 31 at the inverted position B. The fifth link 36 is arranged so as to extend from the third connecting point 40 in the direction opposite to that of the first link 31 at the reversing position B.

Subsequently, the dimensional ratio of each link constituting the link mechanism 30 will be described.
Let s1 be the first dimension between the pivot 37 and the first connection point 38. Let s2 be the second dimension between the first connecting point 38 and the second connecting point 39. Let s3 be the third dimension between the second connecting point 39 and the third connecting point 40. Let s4 be the fourth dimension between the third connection point 40 and the pivot 37. Let s5 be the fifth dimension between the pivot 37 and the fourth connecting point 41. At this time,
s1: s2: s3: s4: s5 = 2.5: 2: 1: 2.5: 2.5 ... (1)
Meet.

Next, the arrangement relationship of each connection point will be described.
Let L1 be the first virtual straight line connecting the first connection point 38 and the fifth connection point 42. Further, the second virtual straight line connecting the pivot 37 and the sixth connection point 43 is defined as L2. Further, the third virtual straight line connecting the fourth connection point 41 and the seventh connection point 44 is defined as L3.
At this time, the first virtual straight line L1, the second virtual straight line L2, and the third virtual straight line L3 are parallel to each other.
Here, let L4 be the fourth virtual straight line connecting the pivot 37 and the first connection point 38. Further, the fifth virtual straight line connecting the fifth connection point 42 and the sixth connection point 43 is referred to as L5. At this time, the bent portion 34a of the third link 34 is arranged in the region on the third connecting point 40 side of the fourth virtual straight line L4 when viewed from the third direction D3. The bent portion 35a of the fourth link 35 is arranged in the region on the third connecting point 40 side when viewed from the third direction D3.

(Motor and mounting part)
The motor 3 is fixed to the vehicle body below the windshield 2. The motor 3 drives the wiper device 1. The output shaft that outputs the driving force of the motor 3 is connected to the fifth link 36 at the second connection point 39. The motor 3 rotates the fifth link 36 around the second connection point 39. The fifth link 36 transmits the driving force of the motor 3 to the first link 31 to move one end of the first link 31 in the first direction D1.

FIG. 4 is a plan view of the wiper device 1 according to the present embodiment, and is a plan view of the wiper device 1 as viewed from the windshield 2 side in the third direction D3.
As shown in FIG. 4, the mounting portion 4 constitutes a vehicle body component, and the lower end of the third link 34 and the lower end of the fourth link 35 are mounted. The mounting portion 4 includes a mounting main body portion 4a extending along the first direction D1 and a pair of fastening portions 4b and 4c (first fastening portion 4b, second fastening portion) protruding from the mounting main body portion 4a on both sides of the second direction D2. 4c) and. The first fastening portion 4b is provided above the mounting main body portion 4a. The second fastening portion 4c is provided below the mounting main body portion 4a. The mounting portion 4 is fixed to the vehicle body by bolts inserted into the fastening portions 4b and 4c. As shown in FIG. 1, the right end of the mounting body 4a is rotatably connected to the third link 34 at the first connecting point 38. The left end of the mounting body 4a is rotatably connected to the fourth link 35 at the fifth connecting point 42.

(Operation of wiper device)
Subsequently, the operation of the wiper device 1 will be described with reference to FIGS. 1, 5 to 8.
FIG. 5 is an enlarged perspective view showing the V portion of FIG.
FIG. 6 is an external view of the wiper device 1 attached to the windshield 2 of the vehicle body according to the present embodiment while the motor 3 is being driven.
FIG. 7 is an external view of the wiper device 1 attached to the windshield 2 of the vehicle body according to the present embodiment at the inverted position B.
FIG. 8 is an enlarged perspective view showing a part VIII of FIG. 7.

As shown in FIG. 1, the wiper blade 10 is arranged at the stop position A before the motor 3 fixed to the vehicle body is driven. The wiper blade 10 extends along the second direction D2 at the stop position A.
The wiper blade 10 reciprocates from the stop position A to the first direction D1 by the driving force of the motor 3 transmitted from the link mechanism 30.

The reciprocating movement of the wiper blade 10 will be specifically described below.
In the following description, when viewed from the wiper blade 10 toward the windshield 2, the clockwise direction is the clockwise direction W1 (see FIG. 8), and the counterclockwise direction is the counterclockwise direction W2 (see FIG. 5). Define.

(Outward movement)
Of the reciprocating movements of the wiper blade 10, the outward movement will be described.
First, the motor 3 is driven. The motor 3 transmits a driving force to the fifth link 36 which is connected to the motor 3 at the second connection point 39. The fifth link 36 is rotated in the counterclockwise direction W2 (see FIG. 5) about the second connecting point 39. As shown in FIG. 1, the third connection point 40 between the fifth link 36 and the first link 31 is counterclockwise so as to draw an arcuate locus C1 having a radius of the third dimension s3 with the second connection point 39 as the center. It is rotated in the clockwise direction W2 (see FIG. 5). The fifth link 36 transmits the driving force of the motor 3 to the first link 31 connected to the fifth link 36. The first link 31 is rotationally moved by the driving force of the motor 3.

The pivot 37 to which the first link 31 and the third link 34 are connected is restricted in the moving direction by the third link 34 connected to the vehicle body. The pivot 37 is rotated by the third link 34 in the counterclockwise direction W2 about the first connection point 38 between the third link 34 and the vehicle body. The pivot 37 is rotated in the counterclockwise direction W2 (see FIG. 5) so that the radius centered on the first connecting point 38 draws an arcuate locus C2 having the first dimension s1.

The upper end of the first link 31 is connected to the right side of the wiper blade 10. The second link 32 is arranged side by side with the first link 31. The upper end of the second link 32 is connected to the left side of the wiper blade 10. The right end of the support link 33 is connected to a pivot 37 provided on the first link 31. The left end of the support link 33 is connected to the lower end of the second link 32. As a result, the wiper blade 10 is supported by the first link 31 and the second link 32 from both sides of the first direction D1. That is, the first link 31 and the second link 32 hold the wiper blade 10 in a state along the second direction D2 in a side-by-side state. Therefore, the wiper blade 10 moves in the first direction D1 along the second direction D2.

The first virtual straight line L1 connecting the first connecting point 38 and the fifth connecting point 42, the second virtual straight line L2 connecting the pivot 37 and the sixth connecting point 43, the fourth connecting point 41 and the seventh connecting point 44. Is parallel to the third virtual straight line L3 connecting the above.
As a result, the rotation of the seventh connecting point 44 around the fourth connecting point 41 is suppressed. Therefore, the wiper blade 10 moves in the first direction D1 along the second direction D2.

The wiper blade 10 starts moving from the stop position A to the first direction D1. The upper end of the wiper blade 10 moves along the upper outer edge portion 2c of the windshield 2. The lower end of the wiper blade 10 moves along the lower outer edge portion 2d of the windshield 2.

The fifth link 36 is rotated by the driving force of the motor 3 in the counterclockwise direction W2 (see FIG. 5) with reference to the position of the fifth link 36 at the stop position A, for example, from 0 degrees to 245 degrees.
As shown in FIG. 6, the wiper blade 10 is arranged at an intermediate position E between the right outer edge portion 2a and the left outer edge portion 2b on the surface of the windshield 2. The wiper blade 10 extends along the second direction D2 at the intermediate position E.
As shown in FIG. 7, the fifth link 36 rotates in the counterclockwise direction W2 (see FIG. 5) up to, for example, 245 degrees. The motor 3 stops driving in the counterclockwise direction W2 (see FIG. 5). As a result, the wiper blade 10 is stopped. The wiper blade 10 is arranged at the reversing position B.
This completes the outbound movement of the reciprocating movement of the wiper blade 10.

(Return trip)
Of the reciprocating movements of the wiper blade 10, the return movement will be described. In the return trip, the wiper blade 10 moves from the reversing position B to the stop position A.
As shown in FIG. 7, the wiper blade 10 is arranged at the inverted position B along the left outer edge portion 2b of the windshield 2 when the above-mentioned outward movement is completed.
When the motor 3 stops driving in the counterclockwise direction W2, the motor 3 starts driving in the clockwise direction W1 (see FIG. 8). The wiper blade 10 moves from the left outer edge portion 2b of the windshield 2 toward the right outer edge portion 2a along the first direction D1. The wiper blade 10 moves in the first direction D1 while maintaining the state along the second direction D2. The wiper blade 10 is arranged at the stop position A from the reversing position B via the intermediate position E.

The wiper blade 10 alternately repeats the above-mentioned outward movement and return movement. As a result, the wiper blade 10 can wipe the surface of the windshield 2 along the first direction D1.

As described above, in the present embodiment, the wiper device 1 includes a fifth link 36 connected to the motor 3. As a result, the fifth link 36 rotates about the second connection point 39 with the motor 3 by the driving force of the motor 3.
Further, the wiper device 1 includes a first link 31 connected to the fifth link 36 at a third connection point 40. As a result, the first link 31 moves by the driving force of the motor 3 transmitted from the fifth link 36.
Further, the upper end of the third link 34 is rotatably connected to the first link 31 by a pivot 37. The lower end of the third link 34 is rotatably connected to the vehicle body. Further, one end of the fifth link 36 is rotatably connected to the first link 31. As a result, the pivot 37 on the first link 31 rotates around the first connection point 38 between the third link 34 and the vehicle body. Therefore, the fourth connection point 41 between the first link 31 and the wiper blade 10 moves in the first direction D1. Therefore, the wiper blade 10 can move in the first direction D1.

Further, the upper end of the first link 31 is rotatably connected to the wiper blade 10 on the right side of the first direction D1 with respect to the central portion of the wiper blade 10 in the first direction D1. Specifically, the upper end of the first link 31 is arranged on the right side of the first direction D1 with respect to the blade portion 11 of the wiper blade 10. The second link 32 is arranged side by side on the left side of the first link 31. The upper end of the second link 32 is connected to the wiper blade 10 on the left side of the first direction D1 with respect to the first link 31. The right end of the support link 33 is rotatably connected to the pivot 37 between both ends of the first link 31. The left end of the support link 33 is rotatably connected to the lower end of the second link 32. The upper end of the fourth link 35 is rotatably connected to the lower end of the second link 32. The lower end of the fourth link 35 is rotatably connected to the vehicle body on the left side of the first direction D1 with respect to the lower end of the third link 34.
As a result, the wiper blade 10 is supported by the first link 31 and the second link 32 from both sides of the first direction D1. The wiper blade 10 can move in the first direction D1 while maintaining the state along the second direction D2.
As a result, the wiper blade 10 can keep the wiping speed constant at each position of the blade portion 11. Therefore, the wiper blade 10 can make the sliding resistance constant at each position of the blade portion 11. Therefore, the wiper device 1 can reduce wiping defects.

Further, according to the above configuration, the wiper blade 10 can keep the wiping speed constant at each position of the blade portion 11. Therefore, the optimum wiping speed can be easily set in order to secure a good field of view through the windshield 2.

By the way, conventionally, there is a wiper blade that moves along a slide groove provided along the lower outer edge portion and the upper outer edge portion of the windshield. However, such a wiper blade has a problem that it bites into the slide groove during the wiping movement. On the other hand, according to the present embodiment, the wiper blade 10 can reciprocate without being bitten into the slide groove. Therefore, the wiper blade 10 can better wipe off dirt and water droplets adhering to the windshield 2.

Further, according to the above configuration, the wiper blade 10 reciprocates in the first direction D1. As a result, the designer can easily select the wiping direction in which the change in the bending ratio of the windshield 2 is small. This allows the designer to design the wiper blade 10 independently of the hardness of the rubber. The designer can design the wiper blade 10 with a simpler structure. Therefore, the manufacturing cost of the wiper device 1 can be reduced.

The dimensional ratio of the first dimension s1, the second dimension s2, the third dimension s3, and the fourth dimension s4 satisfies 2.5: 2: 1: 2.5. In the movement of drawing the arcuate locus C1 of the third connection point 40 between the first link 31 and the fifth link 36, the movement of drawing the arcuate locus C2 of the pivot 37 connecting the first link 31 and the third link 34 is Join. As a result, the fourth connection point 41 between the first link 31 and the wiper blade 10 moves along the first direction D1.
Therefore, the wiper blade 10 can more reliably make the sliding resistance constant at each wiped position of the windshield 2. Therefore, the wiper device 1 can more reliably reduce wiping defects.

The dimensional ratio of the first dimension s1, the second dimension s2, the third dimension s3, the fourth dimension s4, and the fifth dimension s5 satisfies 2.5: 2: 1: 2.5: 2.5. As a result, the locus of the fourth connecting point 41 between the wiper blade 10 and the first link 31 becomes a straight line along the first direction D1.
Therefore, the wiper blade 10 can more reliably make the sliding resistance constant at each wiped position of the windshield 2. Therefore, the wiper device 1 can more reliably reduce wiping defects.

The first virtual straight line L1, the second virtual straight line L2, and the third virtual straight line L3 are parallel to each other. As a result, the seventh connecting point 44 moves in the first direction D1 as the fourth connecting point 41 moves in the first direction D1. Therefore, the rotation of the 7th connection point 44 around the 4th connection point 41 is suppressed. The wiper blade 10 moves in the first direction D1 while being held in a state along the second direction D2 by the first link 31 and the second link 32.
As a result, the wiper blade 10 moves in the first direction D1 along the second direction D2. Therefore, the wiper blade 10 can keep the wiping speed constant at each position of the blade portion 11. Therefore, the wiper blade 10 can make the sliding resistance constant at each position of the blade portion 11. Therefore, the wiper device 1 can more reliably reduce wiping defects.

The third link 34 is formed in a substantially L shape having a bent portion 34a, and the bent portion 34a is arranged in a region on the third connecting point 40 side of the fourth virtual straight line L4. The fourth link 35 is formed in a substantially L shape having a bent portion 35a, and the bent portion 35a is arranged in a region on the third connecting point 40 side of the fifth virtual straight line L5.
As a result, the third link 34 and the fourth link 35 can be arranged closer to the first link 31 as compared with the case where the third link 34 and the fourth link 35 are formed in a straight line. Therefore, the wiper device 1 can be miniaturized, and the discomfort caused by blocking the view of the occupant during the wiping operation can be alleviated. Further, the first connection point 38 between the third link 34 and the vehicle body and the fifth connection point 42 between the fourth link 35 and the vehicle body are the second connection points 39 between the fifth link 36 and the motor 3 at the stop position A. Can be held away from. Therefore, the designer can improve the degree of freedom in the layout of the wiper device 1.

The windshield 2 is formed in a rectangular plate shape. The length of the wiper blade 10 in the second direction D2 is slightly shorter than the length of the right outer edge portion 2a of the windshield 2. As a result, almost the entire surface of the windshield 2 can be wiped by the reciprocating movement between the stop position A and the reversal position B of the wiper blade 10.

The blade connecting portion 13 holds the blade portion 11 sandwiched from both sides of the first direction D1 by the holding portion 15. The arm main body connecting shaft 16 of the blade connecting portion 13 is inserted into a hole provided at the upper end of the rod-shaped portion 18 of the arm main body 14. As a result, the blade portion 11 is rotatably supported with respect to the arm main body portion 14. As a result, the blade portion 11 can wipe the windshield 2 following the surface shape of the windshield 2. Therefore, the wiper blade 10 can better wipe the windshield 2.

The third link 34 and the fourth link 35 are arranged close to the first link 31 at the stop position A. The first link 31 is arranged linearly with the fifth link 36 at the inverted position B. As a result, the driving force of the motor 3 is amplified by the link mechanism 30 in the vicinity of the reversing position B. Therefore, the link mechanism 30 can solve the shortage of the driving force of the motor 3. As a result, the wiper device 1 can easily wipe off, for example, snow accumulated on the windshield 2 at the reversing position B.

The wiper blade 10 is arranged along the right outer edge portion 2a of the windshield 2. The wiper blade 10 reciprocates in the first direction D1 while maintaining the state in which the right outer edge portion 2a extends along the second direction D2.
As a result, the wiper blade 10 can reciprocate while maintaining a state parallel to the direction of the traveling wind flowing along the windshield 2 when the vehicle is traveling. Therefore, the influence of the traveling wind on the wiper blade 10 is reduced. Therefore, it is possible to prevent the design from being restricted by the running wind received by the wiper blade 10.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to this embodiment. The configuration may be added, omitted, replaced, and other changes may be freely made without departing from the spirit of the present invention. The present invention is not limited by the above description, but only by the appended claims.

In the present embodiment, the wiper device 1 is attached to the windshield 2 of the vehicle body of an automobile or the like. However, the wiper device 1 can be applied to other than the windshield 2 of the vehicle body of an automobile or the like. The wiper device 1 can be applied to, for example, a side glass of a vehicle body of an automobile or the like, a rear windshield glass, or the like.

In addition, the components in the above-described embodiments may be replaced with well-known components as appropriate without departing from the spirit of the present invention.

1 ... Wiper device, 2 ... Front glass (windshield glass), 3 ... Motor, 10 ... Wiper blade, 11 ... Blade part, 31 ... 1st link, 32 ... 2nd link, 33 ... Support link, 34 ... 3rd Link, 34a ... Bending part, 35 ... 4th link, 35a ... Bending part, 36 ... 5th link, 37 ... Pivot, 38 ... 1st connecting point, 39 ... 2nd connecting point, 40 ... 3rd connecting point, 41 ... 4th connection point, 42 ... 5th connection point, 43 ... 6th connection point, 44 ... 7th connection point, A ... stop position, D1 ... 1st direction, D2 ... 2nd direction, D3 ... 3rd direction, L1 ... 1st virtual straight line, L2 ... 2nd virtual straight line, L3 ... 3rd virtual straight line, L4 ... 4th virtual straight line, L5 ... 5th virtual straight line, s1 ... 1st dimension, s2 ... 2nd dimension, s3 ... 3 dimensions, s4 ... 4th dimension, s5 ... 5th dimension

Claims (5)

A wiper device that is driven by a motor and wipes the windshield glass of the vehicle.
A wiper blade that reciprocates in the first direction from the stop position along the surface of the windshield glass and is formed in a long shape along the second direction orthogonal to the first direction.
A first link having one end rotatably connected to the wiper blade on one side of the first direction with respect to the central portion of the wiper blade in the first direction.
A second link that is arranged side by side with the first link and has one end rotatably connected to the wiper blade on the other side of the first direction with respect to the first link.
Pivots provided between both ends of the first link and
A support link rotatably connected to the pivot at one end and rotatably connected to the other end of the second link.
A third link rotatably connected to the pivot at one end and rotatably connected to the vehicle body at the other end.
A fourth link having one end rotatably connected to the other end of the second link and the other end rotatably connected to the vehicle body on the other side of the first direction from the third link.
A wiper device including a fifth link having one end rotatably connected to the other end of the first link and the other end connected to the output shaft of the motor. Let s1 be the first dimension between the pivot, the third link, and the first connection point between the vehicle body.
Let s2 be the second dimension between the first connection point and the second connection point between the motor and the fifth link.
Let s3 be the third dimension between the second connecting point and the third connecting point between the fifth link and the first link.
When the fourth dimension between the third connection point and the pivot is s4,
The wiper device according to claim 1, wherein s1: s2: s3: s4 satisfies 2.5: 2: 1: 2.5. When the fifth dimension between the pivot and the fourth connecting point between the wiper blade and the first link is s5,
The wiper device according to claim 2, wherein s1: s2: s3: s4: s5 satisfies 2.5: 2: 1: 2.5: 2.5. A first virtual straight line connecting the first connection point and the fifth connection point between the vehicle body and the fourth link.
A second virtual straight line connecting the pivot and the sixth connection point between the fourth link and the second link.
The wiper device according to claim 3, wherein the fourth connection point and the third virtual straight line connecting the second link and the seventh connection point of the wiper blade are parallel to each other. The third link is formed in a substantially L shape having a bent portion, and the bent portion of the third link is the pivot when viewed from the first direction and the third direction orthogonal to the second direction. It is arranged in the area on the side of the third connection point with respect to the fourth virtual straight line connecting the first connection point and the first connection point.
The fourth link is formed in a substantially L shape having a bent portion, and the bent portion of the fourth link connects the fifth connecting point and the sixth connecting point when viewed from the third direction. The wiper device according to claim 4, wherein the wiper device is arranged in a region closer to the third connection point than the connected fifth virtual straight line.

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