JP7245147B2 - Wiper device - Google Patents

Description

The present invention relates to wiper devices.

A wiper device wipes off raindrops adhering to a glass surface such as a windshield glass or a mirror in order to secure a driver's field of vision.
In order to expand the wiping area on 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 connected to the tip side of the crank so as to be relatively rotatable; and a wiper blade mounted on a wiper arm.

JP 2012-20625 A

By the way, in recent years, with the demand for automatic driving, etc., the number of vehicles with sensors and cameras attached to the inside of the windshield glass is increasing. Sensors and the like attached to the inside of the windshield glass may be impeded by dirt and water droplets adhering to the outside of the windshield glass. Therefore, there is a demand for a wiper device that can effectively remove dirt and water droplets adhering to the windshield glass. In order to effectively wipe away dirt and water droplets, it is necessary to wipe the surface to be wiped evenly. However, in the conventional technology described above, since the wiping speed and the sliding resistance are different at different locations on the wiper blade, wiping failure occurs in which uneven wiping occurs at different locations on the surface to be wiped.

Accordingly, the present invention provides a wiper device capable of reducing wiping failures.

In order to solve the above-mentioned problems, a wiper device according to the present invention is a wiper device that is driven by a motor and wipes a windshield glass of a vehicle, wherein the wiper device moves along the surface of the windshield glass from a stop position to a first position. a wiper blade that reciprocates in a direction and is formed in an elongated shape along a second direction perpendicular to the first direction; and a first link rotatably connected to the wiper blade on one side; and arranged in parallel with the first link, one end of which is rotatable to the wiper blade on the other side in the first direction than the first link. and a pivot provided between both ends of the first link, one end of which is rotatably connected to the pivot and the other end of which is 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; a fourth link whose other end is rotatably connected to the vehicle body on the other side in the first direction relative to the third link; and a fourth link whose one end is rotatably connected to the other end of the first link and whose other end is and a fifth link connected to the output shaft of the motor.

In the above configuration, the first dimension between the pivot and the first connection point between the third link and the vehicle body is s1, and the first dimension between the first connection point and the motor and the fifth link is the first dimension. Let s2 be the second dimension between the two connecting points, let s3 be the third dimension between the second connecting point and the third connecting point between the fifth link and the first link, and Where s4 is the fourth dimension between the third connection point and the pivot, s1:s2:s3:s4 may satisfy 2.5:2:1:2.5.

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

In the above configuration, a first imaginary straight line connecting the first connection point and a fifth connection point between the vehicle body and the fourth link; A second imaginary straight line connecting the 6 connecting points and a third imaginary straight line connecting the fourth connecting point and the seventh connecting point between the second link and the wiper blade, even if they are parallel. good.

The third link is formed in a substantially L-shape having a bent portion, and when viewed from a third direction orthogonal to the first direction and the second direction, the bent portion of the third link is the pivot. and the first connection point, the fourth link is arranged in a region closer to the third connection point than a fourth imaginary straight line connecting the first connection point and the fourth link, and the fourth link is formed in a substantially L shape having a bent portion, When viewed from the third direction, the bent portion of the fourth link is arranged in a region closer to the third connection point than a fifth imaginary straight line connecting the fifth connection point and the sixth connection point. good too.

ADVANTAGE OF THE INVENTION According to this invention, the wiper apparatus which can reduce a wiping failure can be provided.

FIG. 2 is an external view of the wiper device attached to the windshield of the vehicle body according to the present embodiment at a stop position; It is a perspective view of a wiper device concerning this embodiment. It is an expansion perspective view which shows the III section of FIG. It is a top view of a wiper device concerning this embodiment. FIG. 2 is an enlarged perspective view showing a V portion of FIG. 1; FIG. 3 is an external view of the wiper device attached to the windshield of the vehicle body according to the present embodiment while the motor is being driven; FIG. 2 is an external view of the wiper device attached to the windshield of the vehicle body according to the present embodiment, in a reversed position; FIG. 8 is an enlarged perspective view showing the VIII section of FIG. 7;

(Wiper device)
An embodiment of the present invention will be described based on 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 left and right when the windshield is viewed from the front of the vehicle shall point in the direction.
FIG. 1 is an external view of a wiper device 1 attached to a windshield 2 (an example of a "windshield glass" in the claims) of a vehicle body (not shown) according to this embodiment, at a stop position A. FIG.
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 plan view.
The wiper device 1 is provided on a vehicle body such as an automobile. The wiper device 1 wipes away dirt, water droplets, etc. 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 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 2a of the windshield 2 before being moved by the driving force of the motor 3. As shown in FIG. The wiper blade 10 reciprocates from the right outer edge 2a of the windshield 2 to the left outer edge 2b.
In the following description, a stop position A is defined as a position where the wiper blade 10 is arranged along the right outer edge portion 2a. A reversal position B is defined as a position where the wiper blade 10 is arranged along the left outer edge portion 2b.
A direction in which the wiper blade 10 reciprocates is defined as a first direction D1. A direction along the surface of the windshield 2 and orthogonal to the first direction D1 is defined as a second direction D2. A direction orthogonal to the first direction D1 and the second direction D2 is defined as a third direction D3.

The wiper blade 10 is elongated 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 this 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 part 11 wipes the windshield 2 . The blade portion 11 includes a support plate 11a extending along the first direction D1, and 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-like member. The rubber is in close contact with the windshield 2.
As shown in FIG. 1, the arm portion 12 is provided on the opposite side of the windshield 2 with the blade portion 11 interposed therebetween. The arm portion 12 has a blade connecting portion 13 and an arm body portion 14 .

3 is an enlarged perspective view showing the III section of FIG. 1. 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 in the first direction D1, a pair of connecting shaft support walls 17 erected from the holding portion 15, and an arm body portion connecting shaft 16 provided between the 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 to be a U-shape opening toward the blade portion 11 side.
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 in the width direction of the blade portion 11 so as to be spaced apart from each other.
The arm main body portion connecting shaft 16 is separated from the holding portion 15 . The arm main body portion connecting shaft 16 extends along the width direction of the blade portion 11 . The arm body portion connecting shaft 16 is integrally formed with the holding portion 15 and the connecting shaft support wall 17 .

The arm main body 14 includes a rod-shaped portion 18 extending along the blade portion 11, and a pair of link connecting portions 20a and 20b (first link connecting portions 20a, The second link connecting portion 20b) is formed in a T shape as a whole.
An arm body portion connecting shaft 16 is inserted through a hole provided at the upper end of the rod-shaped portion 18 . Thereby, the blade portion 11 is rotatably supported with respect to the arm 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 bar-shaped portion 18. As shown in FIG. 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 bar-shaped portion 18. As shown in FIG.

(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 side by side with the first link 31 and connected to the wiper blade 10, and the first link 31 and the second link 32; a third link 34 that connects the vehicle body and the first link 31; a fourth link 35 that connects the vehicle body and the second link 32; and a fifth link 36 that connects with the first link 31 .

The first link 31 is formed linearly. The upper end of the first link 31 is rotatably connected to the wiper blade 10 on the right side in the first direction D1 of 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 connection portion 20a of the wiper blade 10 at the fourth connection point 41 .
The second link 32 is formed linearly. 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 connection portion 20b at a seventh connection point 44. As shown in FIG.

The support link 33 is formed linearly. The support link 33 is arranged along the first direction D1. A 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 a sixth connection point 43 .
The third link 34 has 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 at a first connection point 38 to the mounting portion 4 of the vehicle body, which will be described later.

The fourth link 35 has 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 a sixth connection point 43 . The lower end of the fourth link 35 is rotatably connected to the mounting portion 4 of the vehicle body at a fifth connection point 42 on the left side of the third link 34 .
The fourth link 35 is arranged along the third link 34 at the stop position A. As shown in FIG.
The fifth link 36 is formed linearly. One end of the fifth link 36 is rotatably connected to the lower end of the first link 31 at a third connection point 40 . The other end of the fifth link 36 that is not connected to the first link 31 is connected to the output shaft (not shown) of the motor 3 at a second connection point 39 . The fifth link 36 is arranged linearly with the first link 31 at the reversal position B. As shown in FIG. The fifth link 36 is arranged to extend from the third connection point 40 in the opposite direction to the first link 31 at the reversal position B. As shown in FIG.

Next, the dimensional ratio of each link that constitutes 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 connection point 38 and the second connection point 39 . Let s3 be the third dimension between the second connection point 39 and the third connection point 40 . Let the fourth dimension between the third connection point 40 and the pivot 37 be s4. Let s5 be the fifth dimension between the pivot 37 and the fourth connection point 41 . At this time,
s1:s2:s3:s4:s5=2.5:2:1:2.5:2.5 (1)
meets

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

(motor and mounting part)
The motor 3 is fixed to the vehicle body below the windshield 2. - 特許庁A 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 viewed from the windshield 2 side in the third direction D3.
As shown in FIG. 4 , the attachment portion 4 constitutes a vehicle body component, and is attached to the lower end of the third link 34 and the lower end of the fourth link 35 . The mounting portion 4 includes a mounting body portion 4a extending along the first direction D1, and a pair of fastening portions 4b and 4c (a first fastening portion 4b and a second fastening portion 4b) projecting from the mounting body portion 4a on both sides in the second direction D2. 4c) and. The first fastening portion 4b is provided above the attachment body portion 4a. The second fastening portion 4c is provided below the attachment 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 a first connection point 38. As shown in FIG. The left end of the attachment body 4a is rotatably connected to the fourth link 35 at the fifth connection point 42. As shown in FIG.

(Operation of wiper device)
Next, operation of the wiper device 1 will be described with reference to FIGS. 1 and 5 to 8. FIG.
5 is an enlarged perspective view showing a V portion of FIG. 1. 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 reversal position B. As shown in FIG.
8 is an enlarged perspective view showing the VIII section of FIG. 7. FIG.

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. At the stop position A, the wiper blade 10 extends along the second direction D2.
The wiper blade 10 reciprocates from the stop position A in the first direction D<b>1 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 referred to as the clockwise direction W1 (see FIG. 8), and the counterclockwise direction is referred to as the counterclockwise direction W2 (see FIG. 5). Define.

(outward movement)
Outward movement of the reciprocating movement of the wiper blade 10 will be described.
First, the motor 3 is driven. The motor 3 transmits driving force to the fifth link 36 that is connected to the motor 3 at the second connection point 39 . The fifth link 36 rotates about the second connection point 39 in the counterclockwise direction W2 (see FIG. 5). As shown in FIG. 1, the third connection point 40 between the fifth link 36 and the first link 31 is reversed around the second connection point 39 so as to draw an arc-shaped locus C1 with a radius of the third dimension s3. 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 .

A pivot 37, to which the first link 31 and the third link 34 are connected, is restricted in its moving direction by the third link 34, which is connected to the vehicle body. The pivot 37 is rotated in the counterclockwise direction W2 by the third link 34 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 as to draw an arcuate locus C2 centered on the first connection point 38 and having a radius of 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 . A right end of the support link 33 is connected to a pivot 37 provided on the first link 31 . A left end of the support link 33 is connected to a lower end of the second link 32 . Thereby, the wiper blade 10 is supported by the first link 31 and the second link 32 from both sides in the first direction D1. That is, the first link 31 and the second link 32 are arranged side by side to hold the wiper blade 10 along the second direction D2. Therefore, the wiper blade 10 moves in the first direction D1 along the second direction D2.

A first virtual straight line L1 connecting the first connecting point 38 and the fifth connecting point 42, a second virtual straight line L2 connecting the pivot 37 and the sixth connecting point 43, and a fourth connecting point 41 and the seventh connecting point 44. and are parallel to the third imaginary straight line L3 connecting .
As a result, rotation of the seventh connection point 44 around the fourth connection 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 in the first direction D1. The upper end of wiper blade 10 moves along upper outer edge 2 c of windshield 2 . The lower end of wiper blade 10 moves along lower outer edge 2 d of windshield 2 .

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

(Return trip)
Among the reciprocating movements of the wiper blade 10, the backward movement will be described. In the backward movement, the wiper blade 10 moves from the reverse position B to the stop position A.
As shown in FIG. 7, the wiper blade 10 is arranged at the reversal position B along the left outer edge portion 2b of the windshield 2 after the forward movement described above is completed.
When the motor 3 stops driving in the counterclockwise direction W2, it starts driving in the clockwise direction W1 (see FIG. 8). The wiper blade 10 moves from the left outer edge 2b of the windshield 2 toward the right outer edge 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 reverse position B through the intermediate position E.

The wiper blade 10 alternately repeats the forward movement and the backward movement described above. Thereby, the wiper blade 10 can wipe the surface of the windshield 2 along the first direction D1.

Thus, in this embodiment, the wiper device 1 has the fifth link 36 that is connected to the motor 3 . As a result, the fifth link 36 rotates around the second connection point 39 with the motor 3 due to the driving force of the motor 3 .
The wiper device 1 also includes the first link 31 that is connected to the fifth link 36 at the third connection point 40 . Thereby, the first link 31 is moved by the driving force of the motor 3 transmitted from the fifth link 36 .
Also, the upper end of the third link 34 is rotatably connected to the first link 31 with a pivot 37 . A lower end of the third link 34 is rotatably connected to the vehicle body. 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 about 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 in the first direction D1 of 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 blade portion 11 of the wiper blade 10 in the first direction D1. 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 link 31 in the first direction D1. The right end of support link 33 is rotatably connected to pivot 37 between the ends of 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 lower end of the third link 34 in the first direction D1.
Thereby, the wiper blade 10 is supported by the first link 31 and the second link 32 from both sides in the first direction D1. The wiper blade 10 can move in the first direction D1 while maintaining the state along the second direction D2.
Thereby, the wiper blade 10 can keep the wiping speed constant at each location of the blade portion 11 . Therefore, the wiper blade 10 can keep the sliding resistance constant at each location of the blade portion 11 . Therefore, the wiper device 1 can reduce wiping failures.

Further, with the above configuration, the wiper blade 10 can keep the wiping speed constant at each location of the blade portion 11 . Therefore, the optimum wiping speed can be easily set to ensure a good view through the windshield 2. - 特許庁

By the way, conventionally, there are wiper blades that move along slide grooves provided along the lower outer edge and the upper outer edge of the windshield. However, such a wiper blade has a problem that it gets caught in the slide groove during the wiping movement. In contrast, according to the present embodiment, the wiper blade 10 can reciprocate without being caught in the slide grooves. Therefore, the wiper blade 10 can better wipe off dirt and water droplets adhering to the windshield 2 .

Moreover, with the above configuration, the wiper blade 10 reciprocates in the first direction D1. Thereby, the designer can easily select the wiping direction in which the change in the curvature of the windshield 2 is small. Thereby, the designer can design the wiper blade 10 without depending on the hardness of the rubber. A designer can design the wiper blade 10 with a simpler structure. Therefore, the manufacturing cost of the wiper device 1 can be reduced.

The dimension 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. The movement of the third connection point 40 between the first link 31 and the fifth link 36 that draws an arc-shaped locus C1 is accompanied by the movement of the pivot 37 that connects the first link 31 and the third link 34 that draws an arc-shaped locus C2. 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 on the windshield 2 . Therefore, the wiper device 1 can more reliably reduce wiping failures.

The dimension 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 trajectory of the fourth connection 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 on the windshield 2 . Therefore, the wiper device 1 can more reliably reduce wiping failures.

The first imaginary straight line L1, the second imaginary straight line L2, and the third imaginary straight line L3 are parallel. Accordingly, the seventh connection point 44 moves in the first direction D1 as the fourth connection point 41 moves in the first direction D1. Therefore, rotation of the seventh connection point 44 around the fourth connection point 41 is suppressed. The wiper blade 10 moves in the first direction D1 while being held in 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 location of the blade portion 11 . Therefore, the wiper blade 10 can keep the sliding resistance constant at each location of the blade portion 11 . Therefore, the wiper device 1 can more reliably reduce wiping failures.

The third link 34 is formed in a substantially L shape with a bent portion 34a, and the bent portion 34a is arranged in a region closer to the third connecting point 40 than the fourth imaginary straight line L4. The fourth link 35 is formed in a substantially L shape with a bent portion 35a, and the bent portion 35a is arranged in a region closer to the third connecting point 40 than the fifth imaginary straight line L5.
As a result, compared to the case where the third link 34 and the fourth link 35 are formed linearly, they can be arranged closer to the first link 31 . Therefore, it is possible to reduce the size of the wiper device 1 and alleviate the discomfort caused by obstructing the passenger's view during the wiping operation. In addition, 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 connected to the second connection point 39 between the fifth link 36 and the motor 3 at the stop position A. can be held apart from Therefore, the designer can improve the freedom of 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 D<b>2 is slightly shorter than the length of the right outer edge 2 a of the windshield 2 . As a result, substantially the entire surface of the windshield 2 can be wiped by the reciprocating movement of the wiper blade 10 between the stop position A and the reverse position B.

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

At the stop position A, the third link 34 and the fourth link 35 are arranged close to the first link 31 . The first link 31 is arranged linearly with the fifth link 36 at the reversal position B. As shown in FIG. As a result, the driving force of the motor 3 is amplified by the link mechanism 30 near the reversing position B. As shown in FIG. Therefore, the link mechanism 30 can solve the driving force shortage 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. As shown in FIG.

The wiper blade 10 is arranged along the right outer edge 2 a of the windshield 2 . The wiper blade 10 reciprocates in the first direction D1 while maintaining a state of extending along the second direction D2 along which the right outer edge portion 2a extends.
Thereby, the wiper blade 10 can reciprocate while maintaining a state parallel to the direction of the running wind flowing along the windshield 2 when the vehicle is running. Therefore, the influence of the running 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 preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments. Additions, omissions, substitutions, and other changes in configuration are possible without departing from the scope of the present invention. The present invention is not limited by the foregoing description, but only by the appended claims.

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

In addition, it is possible to replace the constituent elements in the above-described embodiments with well-known constituent elements as appropriate without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1... Wiper apparatus 2... Front glass (windshield glass) 3... Motor 10... Wiper blade 11... Blade part 31... First link 32... Second link 33... Support link 34... Third Link 34a...Bent part 35...Fourth link 35a...Bent part 36...Fifth link 37...Pivot 38...First connection point 39...Second connection point 40...Third connection point 41 ... fourth connection point 42 ... fifth connection point 43 ... sixth connection point 44 ... seventh connection point A ... stop position D1 ... first direction D2 ... second direction D3 ... third direction L1... First imaginary straight line, L2... Second imaginary straight line, L3... Third imaginary straight line, L4... Fourth imaginary straight line, L5... Fifth imaginary straight line, s1... First dimension, s2... Second dimension, s3... Third dimension 3 dimensions, s4...fourth dimension, s5...fifth dimension

Claims (5)

A wiper device driven by a motor for wiping a windshield glass of a vehicle,
a wiper blade that reciprocates along the surface of the windshield glass from a stop position in a first direction and is elongated in a second direction orthogonal to the first direction;
a first link having one end rotatably connected to the wiper blade on one side in the first direction relative to the central portion of the wiper blade in the first direction;
a second link arranged in parallel with the first link and having one end rotatably connected to the wiper blade on the other side of the first link in the first direction;
a pivot provided between both ends of the first link;
a support link having one end rotatably connected to the pivot and the other end rotatably connected to the other end of the second link;
a third link having one end rotatably connected to the pivot and the other end rotatably connected to the vehicle body;
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 third link in the first direction;
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. s1 is a first dimension between the pivot and a first connection point between the third link and the vehicle body;
Let s2 be a second dimension between the first connection point and a second connection point between the motor and the fifth link, and
s3 is a third dimension between the second connection point and a third connection point between the fifth link and the first link;
When the fourth dimension between the third connection point and the pivot is s4,
2. A 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 connection point between the wiper blade and the first link is s5,
3. A wiper device according to claim 2, wherein s1:s2:s3:s4:s5 satisfies 2.5:2:1:2.5:2.5. a first imaginary straight line connecting the first connection point and a fifth connection point between the vehicle body and the fourth link;
a second imaginary straight line connecting the pivot and a sixth connection point between the fourth link and the second link;
4. A wiper device according to claim 3, wherein a third imaginary straight line connecting said fourth connection point and a seventh connection point between said second link and said wiper blade is parallel. The third link is formed in a substantially L-shape having a bent portion, and when viewed from a third direction orthogonal to the first direction and the second direction, the bent portion of the third link is the pivot. and the first connection point in a region closer to the third connection point than a fourth imaginary straight line connecting 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 connection point and the sixth connection point when viewed from the third direction. 5. The wiper device according to claim 4, wherein the wiper device is arranged in a region closer to the third connecting point than the connecting fifth imaginary straight line.

Images