JP2000052938A - Wiper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper device which does not move easily, even if an outer force is applied at the stop time of a device, without hurting the merrit of the wiper device of both swing type constituted in a small and light shape. SOLUTION: A wiper device 10 is formed in both swing type connected a crank arm 72 to pivot levers 24, 26 respectively by a pair of link rods 76, 78. Respective link rods 76, 78 and crank arm 72 are set in an arrangement relation positioning on nearly one straight line at the stop time of the wiper device. Therefore, even if an outer force is transmitted to the crank arm 72 through the pivot levers 24, 26 and link rods 76, 78, this outer force does not act to a right angle direction for the crank arm 72. Accordingly, the wiper device 10 is not moved easily by the outer force, without the rotation of the crank arm 72 by the outer force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper device for wiping windshield glass of an automobile.

[0002]

2. Description of the Related Art A wiper device for wiping a windshield glass of an automobile includes a wiper arm attached to a pivot shaft which reciprocates within a predetermined range by rotation of the pivot shaft, thereby wiping raindrops or the like on a windshield glass surface. I do.

[0003] In such a wiper device, the pivot shaft is rotatably supported by a wiper bracket having a pivot holder. The wiper bracket is fixed to a vehicle body (for example, a cowl panel or a suspension tower arranged below the windshield glass) by mounting bolts. In a vehicle having a pair of wiper arms and blades, pivot shafts are provided on both sides in the vehicle width direction, respectively.
The wiper brackets supporting these are also fixed to both sides of the vehicle body in the vehicle width direction. Further, there is a so-called frame-integrated wiper device in which these pair of wiper brackets are integrated with a frame as a support base for a wiper motor or the like (for example, Japanese Patent Application Laid-Open No. 9-175336).
No.).

In the wiper device disclosed in the above publication, a bracket is welded and fixed to a support pipe (straight pipe frame) connecting a pair of pivot holders to each other.
The wiper motor is attached and fixed to the bracket, thereby constituting a motor and link assembly as a whole. However, in the wiper device, the crank arm of the wiper motor is connected to one pivot lever by a link rod, and the other pivot lever is configured to be connected by another link rod from one pivot lever. There is a disadvantage that the link rod becomes long. In addition, if the wiper motor and the link rod are not arranged on both sides of the support pipe, the link rod may interfere during operation. On the other hand, when arranging the wiper motor and the link rod on one side of the support pipe, it is necessary to set a large dynamic space for the link rod in order to prevent interference of the link rod, and there is a drawback that the apparatus becomes large. .

In view of the above, instead of such a wiper device, as a wiper device that can be configured to be relatively small and light, a crank arm of a wiper motor is directly connected to each of a pair of pivot levers by separate link rods. A so-called double swing type wiper device is known. In this type of wiper device, the link rod can be configured to be short. In addition, since each link rod is connected to each pivot lever in the opposite direction from the crank arm, the link rods do not cross each other and the dynamic space (movement trajectory) does not overlap. Even if the (crank arm) and each link rod are arranged on one side of the frame, they do not interfere with each other. Therefore, the apparatus can be configured to be relatively small and lightweight as a whole.

By the way, in such a swing type wiper device, even when an external force acts on the wiper arm due to, for example, a snow puddle when the device is stopped, the device is not easily moved by the external force. It is desirable. In this case, if a special component or mechanism such as a lock mechanism is added, the device becomes large and heavy, and the cost increases, which is not a preferable measure.

[0007]

SUMMARY OF THE INVENTION In consideration of the above-mentioned facts, the present invention does not impair the advantage of the swing type wiper device that it can be configured to be small and light, and even if an external force acts when the device is stopped. It is an object to provide a wiper device that does not move easily.

[0008]

According to a first aspect of the present invention, there is provided a wiper device comprising: a pair of pivot shafts rotatably supported by a pivot holder fixed to a vehicle body side and having a wiper arm fixed to a tip thereof; A pair of pivot levers respectively fixed to the pivot shafts, a drive source disposed between the pair of pivot shafts, a crank arm fixed to a rotation shaft of the drive source, the crank arm and the pair of pivots A pair of link rods respectively connecting a lever and a driving force of the drive source to the pivot shaft,
The stop position of the drive source includes a connection point between the one link rod and the one pivot lever, a connection point between the other link rod and the other pivot lever, the crank arm and the pair of links. It is characterized in that the positional relationship between the connection point with the rod and the rotation axis of the crank arm is set to a position that is substantially on a straight line.

In the wiper device according to the first aspect, the crank arms are respectively connected to the pair of pivot levers by separate link rods. Further, a connection point between one link rod and one pivot lever,
The drive source is stopped so that the positional relationship between the connection point between the other link rod and the other pivot lever, the connection point between the crank arm and the pair of link rods, and the rotation axis of the crank arm is substantially on a straight line. The position has been set. That is, the stop position of the drive source is set at a position where each of the pair of link rods and the crank arm are substantially on a straight line, and the pair of link rods are on a substantially straight line with each other.

Here, in order for the wiper device to move by the action of the external force (because the external force acts and is transmitted to the crank arm via the link rod to rotate the crank arm), the external force is applied to the crank arm. Need to act at right angles to the In this regard, in the wiper device according to the first aspect, since the driving source is located at the stop position as described above, that is, the positional relationship between the connection points, an external force is applied to the wiper arm, and the external force is applied to the wiper arm via the pivot lever and each link rod. Even if transmitted to the arm, the external force does not act in a direction perpendicular to the crank arm. Therefore, the crank arm is not rotated by the external force, and the wiper device is not easily moved by the external force.

Further, since a special component or mechanism such as a lock mechanism is not added, the apparatus does not become large and heavy and the cost is not increased.

As described above, the wiper device according to the first aspect of the present invention can be made compact and lightweight without impairing the advantage of the swing type wiper device even if an external force is applied to the wiper arm or the like when the device is stopped. It does not move easily.

According to a second aspect of the present invention, in the wiper apparatus according to the first aspect, the pair of pivot holders are connected by a frame, and the driving source is disposed on one side of the frame. The pivot lever is arranged on one side of the frame while being fixed to the frame, and the offset amount of the frame from the straight line connecting the two pivot shafts to the one side is determined by the positional relationship between the connection points. Are set so as to be set on the substantially straight line.

In the wiper device according to the second aspect, since the frame is provided to be offset to one side from a straight line connecting the two pivot shafts, the substantial position of the drive source (that is, the crank arm and the rotating shaft) is also reduced. Offset from the straight line connecting the pivot shafts to one side. Therefore, a heavy object such as a drive source can be arranged closer to the frame side, and the moment of the heavy object to the frame can be reduced. Further, the offset amount of the frame is adjusted and set so that the positional relationship between the connection points is set substantially on a straight line. That is, by adjusting (changing) the offset amount of the frame, the connection points are positioned substantially in a straight line while a heavy object such as a drive source is arranged closer to the frame side.

Therefore, it is possible to obtain the positional relationship between the connection points without changing the configuration of the drive source at all, and to realize a wiper device that does not easily move by an external force with a simple configuration.

The wiper device according to a third aspect of the present invention is the wiper device according to the second aspect, wherein the frame is a straight pipe member, and the connecting portion fitted and connected to the frame is a pair of pivots. It is characterized in that it is provided on each of the holders, and the connecting portion is formed to extend toward the one side and bend in accordance with the offset amount of the frame.

In the wiper device according to the third aspect, the connecting portions provided on the pair of pivot holders are connected to the frame by being fitted inside the frame. The connecting portion is bent and formed to extend toward the one side according to the offset amount of the frame. That is, the above-described offset amount of the frame is ensured by the connecting portion that is bent to extend to the one side.

Therefore, it is possible to offset this frame to the one side without performing any bending process on the frame formed of the straight pipe material (in other words, the straight pipe shape is directly used as the frame. Can be adopted), and the offset amount can be set with high accuracy, and the frame can be set with high strength.

[0019]

FIG. 1 is a plan view showing the overall configuration of a wiper device 10 according to an embodiment of the present invention, and FIG. 2 is a front view showing the overall configuration of the wiper device 10. It is shown. FIG. 3 is an exploded perspective view showing a configuration of a main part of the wiper device 10.

The wiper device 10 includes a pair of pivot holders 12 and 14. The pivot holder 12 and the pivot holder 14 are formed symmetrically to the left and right, and have the same basic configuration. The pivot holder 12 is provided with a tubular portion 16, and the pivot holder 14 is provided with a tubular portion 18. These cylindrical portions 16 and 18 are formed in a cylindrical shape, and a pivot shaft 20 and a pivot shaft 22 are inserted therethrough and rotatably support them. Pivot levers 24 and 26 are fixed to the lower ends of the pivot shafts 20 and 22, respectively.
The pivot shafts 20 and 22 are rotated by swinging of the pivot levers 24 and 26. Also,
At the corners of the member of the pivot holders 12 and 14, mounting holes 2 are provided.
8, 30 are formed respectively. These mounting holes 2
The wiper device 10 is configured to be fixed to a vehicle body by mounting bolts inserted through the wipers 8 and 30.

The pivot shafts 12 and 14 have connecting shafts 3 on their side walls opposite to the mounting holes 28 and 30.
2, 34 are provided. Connection shaft 32, 34
Is a solid shaft (solid shaft) with a circular cross section,
The distal ends thereof are a connecting portion 36 and a connecting portion 38 which are fitted and connected to a hollow frame 42 described later. These connecting portions 36 and 38 are extended toward a side where the pivot levers 24 and 26 extend with respect to a straight line connecting the pivot shafts 20 and 22, and are formed to bend toward the respective pivot holders. The offset amount of the hollow frame 42 described later is secured. That is, both pivot shafts 2
The connecting portions 36 and 38 are extended toward the one side and bent to correspond to the offset amount of the frame 42 with respect to the straight line connecting 0 and 22.

The connecting shafts 32 and 34 are not limited to solid shafts having a circular cross section, but may be formed as hollow shafts having a circular cross section.

As shown in FIG. 3, the connecting portions 36 and 38
Each of the recesses 40 is formed. The connecting portion 36 of the pivot holder 12 and the connecting portion 38 of the pivot holder 14
Are connected to each other by a hollow frame 42.

The hollow frame 42 is formed of a straight pipe material, and both ends in the longitudinal direction are
The connecting portions 44 and 46 correspond to the connecting portions 36 and 38 of the connecting shafts 32 and 34, respectively. These connecting portions 44 and 46 are formed in an annular cross section. The connecting portion 44 is fitted to the connecting portion 36 of the pivot holder 12, the connecting portion 46 is fitted to the connecting portion 38 of the pivot holder 14, and In this state, each connecting portion 4
4 and 46 are caulked, respectively, and the connecting portions 36,
38 and is connected and fixed. in this way,
By connecting the connecting portion 36 and the connecting portion 38 formed as described above with the hollow frame 42 on the straight, the hollow frame 42 is offset to one side from the straight line connecting the pivot shafts 20 and 22. The hollow frame 42
The pivot levers 24 and 26 described above are located (extend) on one side of the robot.

An attachment portion 48 is formed at a longitudinally intermediate portion of the hollow frame 42. As shown in FIG.
The mounting portion 48 is formed in a non-hollow U-shaped cross section, and the upper surface thereof is a mounting flat seat surface 50. further,
The mounting portion 48 has a pair of mounting holes 52 for fixing a drive source described later. The mounting hole 52 penetrates the front and back sides of the mounting portion 48 (the mounting flat seat surface 50).

A gradually changing portion 54 and a gradually changing portion 56 are provided on both sides in the longitudinal direction of the mounting portion 48 of the hollow frame 42.
Here, FIGS. 5A to 5D show the gradually changing portion 5.
Details of 4 and 56 are shown in cross-sectional views along the lines AA to DD in FIG. As shown in the figures, the gradually changing portions 54 and 56 are connected to the connecting portions 44 and 4 from the mounting portion 48, respectively.
6, the hollow portion is gradually changed from the non-hollow U-shaped cross section to an annular cross section.

The hollow frame 42 (the mounting portion 4) having the above structure
8, the gradually changing portions 54, 56, etc.) are formed by pressing a hollow base material (straight pipe material) having an annular cross section. In particular, the aforementioned gradually changing portions 54, 56
It is formed at the same time as the press working for forming the mounting portion 48. Further, the pair of mounting holes 52 of the mounting portion 48 described above are formed in the same step as the pressing process for forming the mounting portion 48.

A mounting portion 48 of the hollow frame 42 has a flat mounting surface 50 on which a wiper motor 58 as a drive source is mounted.
Is attached. The wiper motor 58 has a configuration in which a motor portion 58A and a gear portion 58B are integrally provided, and a pair of mounting feet 62 is formed to project from one side of a housing 60 of the gear portion 58B. This mounting foot 62
Is mounted on the mounting flat seating surface 50 of the mounting portion 48 of the hollow frame 42, and the wiper motor 58 is connected to one side of the hollow frame 42 (the side on which the above-described pivot levers 24 and 26 extend).
And is fastened and fixed by bolts 64 and nuts 66.

The housing 60 of the wiper motor 58
Has a positioning pin 68 protruding toward its front side (the lower side in the drawing in FIG. 1 and the front side in the drawing in FIG. 2). And support is made.

As described above, the wiper device 10 has a so-called frame integrated structure in which the pair of pivot holders 12 and 14 are integrally formed with the hollow frame 42 as a support base for the wiper motor 58.

The output shaft 70 of the wiper motor 58 protrudes toward the back side of the housing 60 (the back side of the paper in FIG. 1, and the lower side of the paper in FIG. 2), and a crank arm 72 is attached to the tip thereof. . A link rod 76 and a link rod 78 are connected to a distal end of the crank arm 72 via a ball joint 74. One link rod 76 is connected to the pivot lever 24 of the pivot shaft 20 supported by the pivot holder 12.
Is connected via a ball joint 80, and the other link rod 78 is connected to the pivot lever 26 of the pivot shaft 22 supported by the pivot holder 14.
Via a ball joint 82.

As described above, in the wiper device 10, the crank arm 72 of the wiper motor 58 has separate link rods 76, 78 for each of the pair of pivot levers 24, 26.
The wiper motor 58 is operated and the crank arm 72 is rotated, so that the driving force is transmitted through the link rods 76 and 78 and the pivot levers 24 and 26, and the pivot The shafts 20 and 22 are configured to rotate respectively.

Here, in the wiper device 10, as shown in FIG. 6, the stop position of the wiper motor 58 is determined by the connection point A between the one link rod 76 and one pivot lever 24 and the other link rod 78. And a pivot point 26 between the crank arm 72 and each of the link rods 76 and 78, and a rotation axis O of the crank arm 72 (the output shaft 70 of the wiper motor 58). The position is set to be substantially on a straight line. In the present embodiment, for example, the wiper motor 5
8, the one link rod 76 and the crank arm 72 are positioned on the same straight line, and the one link rod 76 and the other link rod 78 are set on a substantially straight line. (Note that FIG. 6 is exaggerated for ease of understanding.)

Here, the wiper motor 5
8 so that the positional relationship between the connection points is substantially in a straight line (corresponding to the positional relationship) in the stopped state of the hollow frame 42 from the straight line connecting the two pivot shafts 20 and 22 to one side. The offset amount is set.

The ends of the pivot shafts 20 and 22 of the wiper device 10 having the above configuration are respectively attached to the wiper arms &
Blades X and Y (shown schematically in FIG. 7) are attached, and the wiper arms & blades X and Y reciprocate within a predetermined range by rotation of the pivot shafts 20 and 22.

Next, the operation of the present embodiment will be described.

In the wiper device 10 having the above-described configuration, the pivot holders 12 and 14 that rotatably support the pivot shafts 20 and 22 are connected to each other by the hollow frame 42, and the mounting portion 48 (the mounting flat seating surface) of the hollow frame 42. A wiper motor 58 is directly fixed to 50), and a crank arm 72 is provided with separate link rods 76, 78 respectively.
As a result, it is a so-called double swing type directly connected to each of the pivot levers 24 and 26, and is in an assembled state as a whole. In this state, the positioning pins 68 provided on the housing 60 of the wiper motor 58 are positioned by fitting into the positioning holes on the vehicle body side, and the window is fixed by the mounting bolts inserted into the mounting holes 28 and 30 of the pivot holders 12 and 14. It is fixed to the vehicle body structural member below the shield glass.

Further, when the wiper motor 58 operates and the crank arm 72 rotates, the link rod 7
6, 78 and the driving force is transmitted via the pivot levers 24 and 26, the pivot shafts 20 and 22 respectively rotate, and the wiper arms & blades X and Y reciprocate within a predetermined range to rotate the windshield glass. Wipe off raindrops, etc.

Here, in this wiper device 10, the crank arm 72 is provided with separate link rods 76, 7 respectively.
The wiper device 10 of this type is directly connected to each of the pivot levers 24 and 26 by the push lever 8. In such a wiper device 10, when an external force acts on the wiper arm due to, for example, a snow pool or the like when the device is stopped. However, it is desirable that the wiper device 10 is not easily moved by the external force.

In this case, in order for the wiper device 10 to move by the action of an external force (because the external force acts and is transmitted to the crank arm 72 via the link rods 76 and 78 to rotate the crank arm 72). This external force needs to act in a direction perpendicular to the crank arm 72.

In this regard, the wiper device 1 according to the present embodiment
0, the stop position of the wiper motor 58 is determined by the connection point A between one link rod 76 and one pivot lever 24, the connection point C between the other link rod 78 and the other pivot lever 26, and the crank arm 72. And a link point B between the link arm 76 and each link rod 76, 78, and the crank arm 72.
Is set at a position where the positional relationship with the rotation axis O (the output shaft 70 of the wiper motor 58) is substantially on a straight line (note that
FIG. 6 is exaggerated for ease of understanding). More specifically, when the wiper motor 58 is stopped, one link rod 76 and the crank arm 72 are positioned on the same straight line, and one link rod 76 and the other link rod 78 are substantially aligned. Is set to

Accordingly, in the wiper device 10, since the stop position of the wiper motor 58 is set as described above, that is, the positional relationship between the connection points, an external force is applied to the wiper arm, which applies the pivot levers 24, 26 and the link rods 76, 78. , The external force hardly acts on the crank arm 72 in the direction perpendicular thereto. Therefore, the crank arm 72 is not rotated by the external force, and the wiper device 10 does not easily move by the external force.

The operation as described above will be further described with reference to FIGS.

The state shown in FIG. 6 is the lower reversal position state of the wiper device 10. At this time, if the connection point A, the connection point B, and the connection point C are on the same straight line L (the rotation axis O of the crank arm 72 is at the O 'position on the straight line connecting the connection point A and the connection point C, B ′ on the straight line connecting point B to connection point A and connection point C
Position), even when an external force is applied to the wiper arm & blades X, Y, etc., the external force does not act in a direction perpendicular to the crank arm 72 (the direction in which the external force acts becomes a direction in which the crank arm 72 cannot rotate), and the wiper It can be seen that the device 10 does not move easily (this is the ideal configuration).

However, if the connection points A, B and C are to be arranged on the same straight line L as described above, the wiper motor 58 is moved from the straight line (virtual frame K) connecting the two pivot shafts 20 and 22. Pivot lever 24, 2
6 must be arranged at positions far apart in the direction of extension. Therefore, the wiper motor 58 is directly connected to the virtual frame K.
In the case of mounting a heavy object as described above, the distance from the mounting portion to the virtual frame K to the center of gravity of the wiper motor 58 becomes long, a moment acts on the mounting portion, and the strength of the virtual frame K needs to be increased. In addition, it is necessary to further firmly fix the virtual frame K. Therefore, in order to reduce the moment, it is desirable that the virtual frame K and the wiper motor 58 are arranged as close as possible.

Therefore, the wiper device 1 according to the present embodiment
As shown at 0, the hollow frame 42 is offset toward the straight line L, and the wiper motor 58 is arranged slightly closer to the virtual frame K.

Here, if the wiper motor 58 is arranged to be closer to the virtual frame K, the link rod 76 (driver's seat side), the crank arm 72, and the link rod 78 ( (Passenger seat side). In order to prevent the wiping operation of the wiper arms & blades X and Y from giving the driver a sense of incompatibility more than the passenger in the passenger seat,
As shown by the solid line in FIG. 6, the link rod 76 and the crank arm 72 are arranged so as to be in a straight line at the lower inverted position of the wiper arm & blade X on the driver's seat side when the wiper device 10 is stopped.

By doing so, the wiper arm and blade X on the driver's seat starts the wiper wiping operation from the lowest point B of the driver's seat wiping range as shown in FIG.
A normal wiper wiping operation is performed such that the crank arm 72 is inverted at the upper inversion position D where the crank arm 72 is rotated by 180 degrees, and returns to the lowermost point B (lower inversion position) again. Note that reference numerals B, D, E, and F in FIG. 7 correspond to the rotational positions of the crank arm 72 in FIG.

On the other hand, when the crank arm 72 starts from the lowermost point B, the wiper arm & blade Y on the passenger side initially moves the pivot lever 26 to the point B and E.
The wiper arm and the blade Y are pulled back by the amount corresponding to the displacement amount H between the points and once returned to the point E (substantially the lowest point of the wiping range of the wiper arm and the blade Y on the passenger seat side), and further, the lowest point E on the passenger seat side.
Reverse with. Thereafter, both the driver side wiper arm & blade X and the passenger side wiper arm & blade Y move forward until the crank arm 72 reaches the point D (moves from the lower inversion position to the upper inversion position).

After that, when the crank arm 72 reaches the upper reversing position D, the wiper arm & blade X on the driver's seat side is reversed, but the wiper arm & blade Y on the passenger side continues until the crank arm 72 reaches the point F. Continue forward. Then, when the crank arm 72 exceeds the point F, the wiper arm & blade Y on the passenger seat side reverses and moves to the lowermost point B.

As described above, the passenger side wiper arm & blade Y moves in the direction opposite to the wiping direction of the driver side wiper arm & blade X near the upside down position. However, with a normal wiper device,
Near the upper reversing position and the lower reversing position of the wiper arms & blades X and Y, the wiper arms & blades X and Y (the pivot lever 24,
Since the rotation angle of 26) is the smallest, even if the crank arm 72 moves within the range of 0 to 5 degrees at that position, it is absorbed by mechanical backlash or the like, and the wiper arms & blades X and Y hardly move.

Therefore, the wiper arm &
The reverse operation of the blade Y is performed by setting ∠BOE (= α + β) to 0.
By setting the angle to be within the range of about 5 degrees, the slight inversion is actually slightly reversed, and the passenger in the passenger seat does not feel uncomfortable.

As described above, in the wiper device 10 according to the present embodiment, since the stop position of the wiper motor 58 is set as described above, that is, the positional relationship is such that the connecting points are substantially on a straight line, an external force is applied to the wiper arm. Even if this is transmitted to the crank arm 72 via the pivot levers 24, 26 and the link rods 76, 78, this external force hardly acts on the crank arm 72 in a direction perpendicular thereto. Therefore, the crank arm 72 is not rotated by the external force, and the wiper device 10 is not easily moved by the external force.

In this case, the wiper device 10
Since the configuration does not include a special component or a mechanism such as a lock mechanism for preventing the device from being easily moved by an external force, the device does not become large, heavy, or costly.

Further, in the wiper device 10, the hollow frame 42 is provided so as to be offset to one side from a straight line connecting the pivot shafts 20 and 22, and the wiper motor 58 fixed to the hollow frame 42 is also provided in the hollow frame 42. (The side where the pivot levers 24, 26 extend). Therefore, the crank arm 7
2 and the substantial position of the output shaft 70 are also offset to one side from the straight line connecting the two pivot shafts 20,22. The offset amount of the hollow frame 42 is set so that the positional relationship between the connection points is set substantially on a straight line. That is, by adjusting (changing) the offset amount of the hollow frame 42, the connection points are positioned substantially on a straight line.

Therefore, it is possible to obtain the positional relationship between the connection points without changing the structure of the wiper motor 58 at all, and to operate the wiper device 10 which is not easily moved by an external force.
Can be established with a simple configuration.

Further, in this wiper device 10, the connecting portions 36, 38 of the connecting shafts 32, 34 provided on the pair of pivot holders 12, 14 respectively correspond to the one side corresponding to the offset amount of the hollow frame 42. It is formed by extending toward. That is, the offset amount of the hollow frame 42 is ensured by the connecting portions 36 and 38 that are bent and formed to extend to the one side.

Therefore, the hollow frame 42, which is a straight pipe material, is not bent at all,
Since the hollow frame 42 can be substantially offset to the one side (in other words, a straight pipe shape can be adopted as the hollow frame 42 as it is), a heavy object such as a driving source is moved to the frame side. And the above moment can be reduced to achieve high precision and high strength.

As described above, in the wiper device 10 according to the present embodiment, an external force is applied to the wiper arm and the like when the device is stopped without impairing the advantage of the swing type wiper device that can be configured to be small and lightweight. It does not move easily when you join.

[Brief description of the drawings]

FIG. 1 is a plan view showing an overall configuration of a wiper device according to an embodiment of the present invention.

FIG. 2 is a front view showing the overall configuration of the wiper device according to the embodiment of the present invention.

FIG. 3 is an exploded perspective view showing a configuration of a main part of the wiper device according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view showing details of a mounting portion of a hollow frame included in the wiper device according to the embodiment of the present invention.

FIG. 5 is a sectional view showing details of a gradually changing portion of the hollow frame included in the wiper device according to the embodiment of the present invention.

FIG. 6 is a schematic configuration diagram illustrating a positional relationship between connection points of a link mechanism included in the wiper device according to the embodiment of the present invention.

FIG. 7 is a schematic front view showing a moving state of a wiper arm and blade of the wiper device according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Wiper device 12 Pivot holder 14 Pivot holder 20 Pivot shaft 22 Pivot shaft 24 Pivot lever 26 Pivot lever 32 Connection shaft 34 Connection shaft 36 Connection part 38 Connection part 42 Hollow frame 58 Wiper motor (drive source) 72 Crank arm 76 Link rod 78 Link rod

Claims (3)

[Claims] A pair of pivot shafts rotatably supported by a pivot holder fixed to a vehicle body side and having a wiper arm fixed at the distal end; a pair of pivot levers respectively fixed to the pair of pivot shafts; A driving source disposed between the pair of pivot shafts, a crank arm fixed to a rotation shaft of the driving source, and the crank arm and the pair of pivot levers connected to each other to drive the driving force of the driving source to the pivot; A wiper device having a pair of link rods transmitting to a shaft, wherein the stop position of the drive source is a connection point between the one link rod and the one pivot lever, and the other link rod and the other A connecting point with the pivot lever, a connecting point between the crank arm and the pair of link rods, Wiper device, wherein the positional relationship between the rotation axis of the arm is set to a position where the on substantially straight line. 2. A pair of pivot holders are connected by a frame, the drive source is arranged on one side of the frame and fixed to the frame, and the pivot lever is arranged on one side of the frame. And an offset amount of the frame from a straight line connecting the two pivot shafts to the one side is adjusted and set so that a positional relationship between the connection points is set on the substantially straight line. The wiper device according to claim 1, wherein 3. The frame is made of a straight pipe material, and connection portions that are fitted and connected to the frame are provided on the pair of pivot holders, respectively, and the connection portions are provided in accordance with an offset amount of the frame. The wiper device according to claim 2, wherein the wiper device is formed by being extended toward the one side.