JP3215662B2 - Vehicle wiper device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A wiper device for a vehicle for wiping windshield glass or the like of an automobile includes a wiper arm and a wiper blade held by the wiper arm.

In the wiper arm, one end of an arm head is fixed to a pivot shaft, and a retainer is connected to the other end of the arm head via a support shaft so as to be rotatable by a predetermined angle. A spring is attached between the arm head and the retainer, and constantly biases the retainer toward a wiping surface such as a windshield glass. An arm piece is fixed to the tip of the retainer. The distal end of the arm piece is bent into a substantially U-shape to form a holding portion, and connects and holds the wiper blade. on the other hand,
The wiper blade includes a blade rubber that contacts and wipes the wiping surface, and a plurality of holding levers that hold the blade rubber.

When the wiper device for a vehicle is operated, the wiper arm and the wiper blade reciprocate, so that the blade rubber moves while being in close contact with the windshield glass surface and wipes raindrops.

By the way, in such a wiper device for a vehicle, a wide-area wiping provided with a telescopic wiper arm is provided so that an unwiped area is not generated as much as possible over the entire surface of the windshield glass (so that the wiping range is enlarged). A wiper device having a wiper arm called a four-link type wiper arm has been known among the wide-range wiping-type wiper devices (for example, Japanese Patent Application Laid-Open No. SHO 61-61). 181745).

A vehicle wiper device having a wiper arm of this type, which is a four-link type, includes a pair of a main lever and a sub lever. The main lever is connected and fixed to a pivot shaft, and the sub-lever is rotatably supported by a support shaft provided at a position separated from the pivot shaft by a predetermined distance. Further, the main lever and the sub-lever are arranged in parallel with each other, and have a configuration in which an arm head is rotatably connected to each end.

When the main lever rotates together with the pivot shaft, the arm head to which the sub-lever is connected rotates while relatively moving toward and away from the pivot shaft, and as a result, the entire length of the wiper arm expands and contracts. Thereby, at the predetermined wiping position, the entire length of the wiper arm is apparently elongated, and the wiping range is expanded. Therefore, for example, when wiping a windshield glass surface having a relatively long vertical dimension, a wiper device having a general wiper arm (the arm head is directly fixed to the pivot shaft, and the wiper arm and the wiper blade are simply In comparison with the case where the reciprocating arc rotates around the pivot axis), the area of the windshield glass that is left unwiped is less likely to occur in the entire area.

By the way, in a vehicle wiper device having a wiper arm of this type, which is a four-bar link type, as described above, a main lever and a sub-lever which are arranged in parallel with each other and rotate, and an arm head in which these are connected. Constitutes a link mechanism as a whole. However, if snow or the like adheres to or stays in the moving range of these link mechanisms, it may hinder the smooth operation of the wiper device. There is a need for measures that can prevent this. Also, in particular,
It is also necessary to prevent foreign matter such as twigs from accidentally entering the moving range of the link mechanism.

In this case, it is conceivable to cover all of the levers and the like with the engine hood of the vehicle so as not to be exposed to the outside. However, the main lever and the sub lever and the arm head to which they are connected are relatively wide. It is difficult to secure or completely cover the moving space in the engine hood because of moving within the range.

[0010] Furthermore, since the connecting portion between the main lever and the sub-lever and the arm head is always exposed to the outside and slidably rotates when the wiper is operated, measures are taken to maintain smooth operation by applying grease or the like. However, the grease spilled out due to rainwater, shortening the life of the connection. In particular, when a so-called tandem-type wiper for wiping with two wiper arms and a wiper blade arranged in the vehicle width direction as shown in FIG. In the case where the link mechanism of the four-bar link is disposed, the direct splash of rainwater wiped by the one wiper blade is remarkable, so that a waterproof measure is indispensable.

[0011]

SUMMARY OF THE INVENTION In view of the above, the present invention considers the fact that snow or the like stays in the link mechanism portion of the wiper arm which is a four-bar linkage type with a main lever, a sub lever and an arm head to which the main lever and the sub lever are connected. An object of the present invention is to provide a wiper device for a vehicle which can prevent dripping and foreign matter from being caught and can waterproof the connecting and rotating portion of each lever and the arm head, and can realize this with a simple structure at low cost. is there.

[0012]

According to a first aspect of the present invention, there is provided a wiper device for a vehicle, comprising: a main lever connected to a rotating shaft provided on a vehicle body and rotating together with the rotating shaft; A sub-lever rotatably supported on a support shaft provided on the vehicle body at a distance, and an arm rotatably connected via a connection shaft above a leading end of the main lever and a leading end of the sub-lever. And a wiper arm having a four-joint link having a head, and a wiper blade connected to a tip thereof, and a rotating shaft provided separately from the rotating shaft.
A second rotating shaft that rotates in synchronization with the rotating shaft,
A second arm head that rotates together with the second rotation shaft;
Connected to the second arm head and a second
The vehicle wiper apparatus having a second wiper arm Paburedo is connected, wherein the main lever and the
At least one of the sub levers is
A stepped portion that protrudes toward the
Serial and the connecting shaft is coupled to the stepped portion, with a link cover covering a moving range of the main lever and the sub lever is mounted above the arm head, prior to
Serial link cover, the main lever and before the side wall
A lower inversion position of the second wiper blade , the extension portion extending to at least one side of the sub- lever;
At the side of the second wiper blade in the closing direction.
The main lever and the sub lever by the connection shaft
The connection with at least one of the
The extension of the link cover is the second wiper brake.
On the side of the door .

In the wiper device for a vehicle according to the first aspect, the main lever is connected and fixed to the rotation shaft, and the sub lever is rotatably supported by a support shaft provided at a distance from the rotation shaft. Have been. Further, these main lever and sub lever are arranged in parallel with each other,
Each tip is rotatably connected to an arm head via a connection shaft. Moreover,
Separately from the wiper arm, the second arm head and the second wiper
The power arm and the second wiper blade are provided.
And two wiper arms arranged in the vehicle width direction.
So-called tandem in which the wiper blades are synchronized and wiped
It is configured as a formula wiper.

When the main lever rotates together with the rotation shaft,
By the sub-lever that regulates the operation of the arm head following the rotation operation of the main lever, the arm head rotates while relatively moving away from the rotation axis, and as a result, the entire length of the wiper arm expands and contracts. Thereby, at the predetermined wiping position, the entire length of the wiper arm is apparently elongated, and the wiping range is expanded. Therefore, compared to a wiper device having a general wiper arm, an unwiped area is less likely to occur in the entire area of the windshield glass surface. Also,
The second wiper blade is synchronized with the operation of the wiper arm of
Performs the wiping operation.

Here, in the vehicle wiper device according to the first aspect, a link cover is provided integrally with the arm head. The link cover covers at least an uncovered area of the movement range of the main lever and the sub-lever which is not covered by the hood of the vehicle.

Therefore, even if snow or the like adheres or stays in the moving range of the link mechanism constituted by the main lever, the sub lever, and the arm head, this is prevented by the link cover. Therefore, it is possible to prevent the smooth operation of the link mechanism, that is, the wiper device from being hindered. In particular, it is possible to prevent foreign matter such as twigs from accidentally entering the moving range of the link mechanism.

Further, in the vehicle wiper device according to the first aspect, at least one of the main lever and the sub lever is provided.
Has a stepped part protruding toward the arm head on either side
Because the connecting shaft is connected to this stepped part,
Link connecting parts of the levers
Can be placed inside the
You. Therefore, the connecting part due to water splash to the link mechanism part
Prevents grease spillage and muddy water from entering, resulting in a long service life at the connection
And maintain smooth operation of the link mechanism.
it can.

A vehicle wiper according to claim 1.
The device consists of two wiper arms arranged in the width direction of the vehicle.
So-called tandem in which the wiper blades are synchronized and wiped
It is configured as a formula wiper. Moreover, the second wiper brake
At the lower turning position on the closing direction side of the
When the link mechanism is arranged, the second wiper blade
Rainwater that has been swept away from the side of the side of the link machine
However, the extension of the link cover is on the second wiper blade side.
Formed on the link cover.
Water directly to the connection between each lever and arm head
Can be prevented. Therefore, it is possible to further prevent the grease from flowing out of the connecting portion and the muddy water from entering the connecting portion, thereby contributing to prolonging the life of the connecting portion, and reliably maintaining the smooth operation of the link mechanism.

As described above, the vehicle wiper device according to the first aspect includes the wiper arm of a four-joint type with the main lever and the sub-lever and the arm head to which the main lever and the sub-lever are connected , and the second wiper arm and the second wiper.
A so-called tandem wiper with blades
In the link mechanism portion, it is possible to prevent snow or the like from staying or foreign matter being caught in the link mechanism portion, and to waterproof the connecting and rotating portion between each lever and the arm head. It can be realized at low cost with a simple structure.

According to a second aspect of the present invention, there is provided a wiper device for a vehicle, wherein the wiper device is connected to a rotating shaft provided on a vehicle body and cooperates with the rotating shaft.
And the main lever that rotates
A sub-rotatably supported by a support shaft provided on the vehicle body.
A bar, a tip of the main lever, and the sub-lever
Rotate via the connecting shaft above each of the tips
Arm bar that is operatively connected with the four-bar link
Is formed and the wiper blade is connected to the tip.
In a vehicle wiper device provided with an arm,
At least one of a lever and the sub-lever
Has a stepped portion protruding toward the arm head side.
And the connecting shaft is connected to the stepped portion.
And mounted above the arm head to
Link cover that covers the moving range of lever and sub-lever
A bar, and the side wall of the link cover is
At least one of the lever and the sub-lever.
Having an extending portion extending on one side, and the connecting shaft
At least one of the main lever and the sub lever
The stepped portion in the connection portion with one of the
The side of the arm head from the tip of the extension of the cover
, Are characterized in that Therefore,
In the vehicle wiper device according to the second aspect, the stepped portion is formed of a phosphorus.
Arm head side (top direction) from the end of the cover cover extension
, Each lever configured in the stepped part
The connection part of the
Rainwater and muddy water
It is hard to penetrate the junction and can exert a large waterproof effect
Wear.

According to a third aspect of the present invention, in the wiper device for a vehicle according to the first or second aspect, the arm head surrounds at least one of the main lever and the sub lever around the connection shaft. Any
It is projected portion which projects to one side is formed, and between the protruding portion and the stepped portion of the arm head, wearing the cup washer surrounding said protruding peripheral edge portion is bent in a ring shape A grease reservoir is provided.

In the wiper device for a vehicle according to the third aspect, since the cup washer is mounted on the connecting and rotating portion of each lever to provide a grease reservoir, grease for lubricating the connecting and rotating portion flows out. Nothing. For this reason, in addition to the fact that the connecting and rotating portion between each lever and the arm head can be waterproofed by the side wall of the link cover as described above, the smooth operation of the link mechanism can be maintained more reliably.

[0023]

FIG. 4 is a plan view showing the overall structure of a vehicle wiper device 10 according to a first embodiment of the present invention, and FIG. Is shown in a front view of the vehicle.

The wiper device 10 includes a wiper arm 12
And the wiper blade 3 held by the wiper arm 12
6.

The wiper arm 12 has a main lever 14 and a sub lever 16. The main lever 14
One end thereof is fixed to a pivot shaft 18 provided as a rotation shaft provided on the vehicle, and always rotates together with the pivot shaft 18. The sub-lever 16 is rotatably supported by a support shaft 20 provided at a predetermined distance from the pivot shaft 18, and the vehicle body or the frame between the pivot shaft 18 and the support shaft 20 forms an immovable link. are doing. Furthermore, these main lever 14 and sub lever 16 are
The main levers 14 are arranged side by side with each other.
An arm head 24 is rotatably connected to a leading end of the sub-lever 16 by a connecting shaft 22 which will be described in detail later.
Thus, the arm head 24 is rotatably connected.

A retainer 28 constituting the wiper arm 12 is connected to the other end of the arm head 24 via a support shaft 30 so as to be rotatable by a predetermined angle in a direction approaching and separating from the windshield glass G. Further, the retainer 28
A spring (not shown) is stretched between the arm head 24 and the arm head 24, and always urges the retainer 28 toward the wiping surface of the windshield glass G. Further, an arm piece 32 that constitutes the wiper arm 12 together with the retainer 28 is fixed to a distal end portion of the retainer 28. The distal end of the arm piece 32 is bent into a substantially U-shape to form a holding portion 34, and the wiper blade 36 is connected and held via a clip member (not shown).

As described above, the wiper device 10 includes the wiper arm 12 of a four-link type. When the main lever 14 rotates together with the pivot shaft 18, the arm is driven by the rotation of the main lever 14. The arm lever 24 is controlled by the sub-lever 16 that regulates the operation of the head 24.
Rotate relative to the pivot shaft 18 while relatively moving away from it, and as a result, the entire length of the wiper arm 12 expands and contracts (the supporting position of the arm head 24 is displaced and the overall length apparently expands and contracts).

Further, a link cover 40, which will be described in detail later, is attached to the arm head 24.

On the other hand, a second pivot shaft 100 as a second rotation shaft is provided on the lateral side of the pivot shaft 18 supporting the main lever 14 in the vehicle width direction. The second pivot shaft 100 rotates in synchronization with the pivot shaft 18. Further, the second pivot shaft 100 has the second arm head 10
2 is fixed, and the second arm head 102 has the second
The wiper arm 104 is connected, and a second wiper blade 106 is connected to the tip of the second wiper arm 104.

That is, the wiper device 10 is of a so-called tandem type in which the wiper is wiped by two wiper arms 12 and the second wiper arm 104 (the wiper blade 36 and the second wiper blade 106) arranged in the vehicle width direction. .

In this case, the second wiper blade 10
6 at the lower turning position X, the second wiper blade 106
4 in the closing direction (the direction of the arrow A in FIG. 5).
The link mechanism of the joint link (particularly, the connecting portion of the main lever 14 and the sub-lever 16 by the connecting shafts 22 and 26) is located.

FIG. 2 is a perspective view showing the structure of the arm head 24 and the link cover 40 attached to the arm head 24, and FIG.
4 and the structure of the link cover 40 are shown in a sectional view. In each of the drawings, the upper and lower sides (top and bottom) are shown upside down.

The link cover 40 is made of resin, is formed in a substantially sector shape as a whole, and includes a mounting portion 42 and a covering portion 44. The mounting section 42 is provided for the arm head 2.
4, a pair of peripheral walls 46 and 48 facing each other and an upper wall 50 continuous between upper ends of the peripheral walls 46 and the peripheral wall 48 have a U-shaped cross section open on one side. It is formed in a shape. Further, a plurality of locking pieces 52 are formed in the mounting portion 42. These locking pieces 52
Are erected independently of the peripheral walls 46 and 48 at positions spaced inward from the peripheral wall 46 and the peripheral wall 48 by a predetermined distance, and are provided with locking recesses 54 formed in the arm head 24.
It is a configuration to engage with. Also, here, the arm head 24
A plurality of locking recesses 54 are provided in a staggered manner without opposing each other in the width direction of the arm head 24, and the locking pieces 52 of the link cover 40 are also provided in the mounting portion 42 in a staggered manner correspondingly.

When the locking pieces 52 are engaged with the locking recesses 54, the link cover 40 (the mounting portion 42) is fixed to the arm head 24 in a state where movement in the longitudinal direction and the width direction is prevented. Configuration.

On the other hand, the covering portion 44 continuously extends in a fan shape from the mounting portion 42 (peripheral wall 48).
And an upper wall 58 continuous with the upper wall 50.
And is constituted by.

In the link cover 40 having the above-described structure, the mounting portion 42 is attached to the arm head 24 from above, and the cover portion 44 extends directly above the main lever 14 and the sub-lever 16 described above. It is in an arrangement state (a state in which the main lever 14 and the sub-lever 16 are located outside the vehicle (on the front side in FIG. 4)), and covers a link mechanism portion including the main lever 14 and the sub-lever 16.

Here, the link cover 40 (covering portion 44) covers at least a non-covering range of the moving range of the main lever 14 and the sub-lever 16 which is not covered by the vehicle engine hood F (see FIG. 5). The size and the shape are set in the table. Therefore,
When the link cover 40 is attached to the arm head 24, the link mechanism portion including the main lever 14 and the sub-lever 16 is configured not to be exposed to the outside.

The link cover 40 (arm head 2)
4), a spacer stopper 60 is mounted. The spacer stopper 60 is formed in a thin plate shape as a whole, and is disposed between the locking piece 52 located on the side of the peripheral wall 48 (the covering portion 44) and the peripheral wall 48 among the plurality of locking pieces 52 described above. It is mounted in close contact.

Further, a claw portion 62 is formed on one side of the spacer stopper 60 (on the side of the peripheral wall 48) so as to protrude therefrom, and can be fitted into a locking hole 64 formed in the peripheral wall 48. That is, the spacer stopper 60 is integrally fixed to the mounting portion 42 of the link cover 40 by fitting the claw portion 62 into the locking hole 64.

The pivotal connection between the arm head 24 with the above-structured link cover 40 and the main lever 14 and the sub-lever 16 (ie, the connection shaft 2)
2 or a connection part by the connection shaft 26) will be described.

FIG. 1 is a cross-sectional view showing details of a connection pivoting portion between the arm head 24 and the main lever 14 by the connection shaft 22.

The connecting shaft 22 has an umbrella-shaped head 22A, and the tip is fixed to the main lever 14 by caulking. The main lever 14 around the connecting shaft 22 is provided with a stepped portion 66 in which the connecting portion is formed in a stepped state protruding upward (toward the arm head 24). On the other hand, a bearing 70 is provided in the connecting hole 68 of the arm head 24, and the connecting shaft 22 is supported via the bearing 70. A washer 72 is disposed between the head 22A of the connecting shaft 22 and the arm head 24, and a washer 7 is disposed between the main lever 14 and the arm head 24.
4 are arranged. Further, a seal ring 76 is provided between the connection shaft 22 near the washer 74 and the arm head 24.
Is provided.

Here, the peripheral wall 46 (the peripheral wall on the second wiper arm 104 side) of the link cover 40 attached to the arm head 24 has an extending portion extending downward so as to cover the connecting portion. 46A is formed, and its tip reaches a part very close to the surface of the main lever 14 on the arm head 24 side. Further, a stepped portion 66 formed by projecting a connecting portion of the main lever 14 toward the arm head 24 side is provided with an extending portion 46 of the link cover 40.
Since the connecting portion is inserted into the link cover 40 by being arranged in the ceiling direction (the arm head 24 side) from the tip A, it is difficult for rainwater or muddy water to directly enter the connecting portion, and exhibits a waterproof effect. I have.

Note that the connection rotation portion between the sub lever 16 and the arm head 24 by the other connection shaft 26 is described below.
Since the configuration is similar to that described above, the description is omitted.

Next, the operation of the first embodiment will be described. In the vehicle wiper device 10 having the above-described configuration, the wiper arm 12 and the wiper blade 36 reciprocally rotate with the rotation of the pivot shaft 18 and the second wiper arm 104 with the rotation of the second pivot shaft 100. And, the second wiper blade 106 reciprocates to wipe raindrops and the like on the windshield glass surface.

In this case, when the main lever 14 rotates together with the pivot shaft 18, the arm head 24 is moved relative to the pivot shaft 18 by the sub-lever 16 that follows the rotation of the main lever 14 and regulates the operation of the arm head 24. The wiper arm 1
The entire length of 2 expands and contracts (the supporting position of the arm head 24 is displaced and the overall length apparently expands and contracts). Thus, at the predetermined wiping position, the entire length of the wiper arm 12 is apparently elongated, and the wiping range is expanded. Therefore, compared to a wiper device having a general wiper arm, an unwiped area is less likely to occur in the entire area of the windshield glass surface.

Here, in the wiper device 10, a link cover 40 is provided integrally with the arm head 24. The cover portion 44 of the link cover 40 is located outside the vehicle with respect to the main lever 14 and the sub-lever 16, and is provided by the engine hood F of the vehicle within the moving range of the link mechanism portion including the main lever 14 and the sub-lever 16. At least the uncoated areas that are not covered are covered.

Therefore, even if snow or the like adheres or stays in the moving range of the link mechanism portion constituted by the main lever 14, the sub-lever 16 and the arm head 24, this is prevented by the link cover 40. Therefore, it is possible to prevent the smooth operation of the link mechanism, that is, the wiper device 10 from being hindered. In particular, it is possible to prevent foreign matter such as twigs from accidentally entering the moving range of the link mechanism.

Further, the link cover 40 is formed such that the locking pieces 52 formed on the mounting portion 42 are engaged with the locking recesses 54 formed on the arm head 24 so that the arm head 2
4 is fixed to the arm head 24 in a state in which movement in the longitudinal direction and the width direction is prevented, so that the link cover 40 can be attached by a simple operation, and assembling workability is improved. Further, in this case, the locking piece 52 is erected independently from the peripheral walls 46 and 20 at a position spaced inward from the peripheral wall 46 and the peripheral wall 48 of the mounting portion 42 by a predetermined distance. When the link cover 40 (mounting portion 42) is attached, the locking piece 52 is easily bent and engages with the locking recess 54 of the arm head 24. Accordingly, this also further improves the assemblability of the link cover 40 (the mounting portion 42).

The locking piece 52 formed on the link cover 40 (mounting portion 42) and the locking recess 54 formed on the arm head 24 are formed by the arm head 24 and the mounting portion 42.
Are not staggered in the width direction but are staggered along the longitudinal direction.
Required wall thickness can be easily secured, and the degree of freedom in design is improved.

A spacer stopper 60 is mounted on the mounting portion 42 of the link cover 40 mounted on the arm head 24.
Is prevented from being deflected in the direction in which it is detached from the locking recess 54.

That is, the mounting portion 42 of the link cover 40
In the above, a spacer stopper 60 is provided between the locking piece 52 located on the side of the peripheral wall 48 (the covering portion 44) and the peripheral wall 48.
Are mounted in close contact. Therefore, the surrounding wall 48
The space between the peripheral wall 48 and the locking piece 52 which is independently provided at a position separated from the peripheral wall 48 is removed (the peripheral wall 48 and the locking piece 52 are integrated via a spacer stopper 60). Has been). As a result, the locking piece 52 is prevented from bending in the direction in which the locking piece 52 is detached from the locking recess 54 of the arm head 24, and the engagement between the locking piece 52 and the locking recess 54 is not released. Also, the mounting portion 42, that is, the link cover 40, does not unnecessarily come off the arm head 24.

Further, the spacer stopper 60 is formed such that the claw 62 formed on the side surface is fitted into the locking hole 64 formed on the peripheral wall 48, so that the mounting portion 4 of the link cover 40 is formed.
The spacer stopper 60 itself is not unnecessarily detached since the spacer stopper 60 is integrally fixed (prevented from coming off). Therefore, the fixed state of the link cover 40 can be reliably maintained.

In the wiper device 10, the link cover 4 attached to the arm head 24 is used.
0 peripheral wall 46 (peripheral wall on the second wiper arm 104 side)
Has an extending portion 46A extending downward so as to cover the connecting portion, and the tip of the extending portion 46A reaches a portion extremely close to the surface of the main lever 14 on the arm head 24 side. Further, a stepped portion 66 formed by projecting a connecting portion of the main lever 14 toward the arm head 24 is disposed in a ceiling direction (the arm head 24 side) from a tip end of the extending portion 46A of the link cover 40 to form a link cover. Since the connecting portion is inserted into the inside of the forty, it is difficult for rainwater or muddy water to directly enter the connecting portion.
Has a waterproof effect.

Therefore, the connecting and rotating portions are not unnecessarily wetted, and the connecting and rotating portions are waterproofed, so that the smooth operation of the link mechanism can be maintained.

As described above, in the wiper device 10 according to the first embodiment, the link mechanism portion of the wiper arm 12 which is of a four-bar type with the main lever 14 and the sub-lever 16 and the arm head 24 to which they are connected. In addition, it is possible to prevent snow or the like from staying or foreign matter from being caught, and to waterproof the connecting and rotating portion between each lever and the arm head 24, and to realize this with a simple structure at low cost.

Next, another embodiment of the present invention will be described. Note that components that are basically the same as those in the first embodiment are given the same reference numerals as in the first embodiment, and descriptions thereof are omitted.

FIG. 6 is a sectional view showing the structure of a connecting and rotating portion between the arm head 24 and the main lever 14 of a vehicle wiper device 80 according to a second embodiment of the present invention.

In the wiper device 80, the arm head 2
4 and the link cover 40 are the same as those in the first embodiment, but a concave groove 82 is formed in a side wall portion of the stepped portion 66 provided on the main lever 14. .

Further, the peripheral wall 46 of the link cover 40 attached to the arm head 24 extends downward so as to face the connecting rotation portion between the main lever 14 and the arm head 24 by the connecting shaft 22. And the distal end thereof is bent toward the connecting shaft 22 to form a distal bent portion 46.
B is provided. The bent end portion 46B is provided with the groove 8
2 is inside. As a result, the extended peripheral wall 46 (tip bent portion 46B) covers a connecting rotation portion between the main lever 14 and the arm head 24 by the connecting shaft 22.

Incidentally, the connection rotation portion between the sub-lever 16 and the arm head 24 by the other connection shaft 26 is described below.
Since the configuration is similar to that described above, the description is omitted.

In the wiper device 80 having the above structure, the main lever 14, the sub lever 16, and the arm head 24
If snow or the like adheres or stays in the movement range of the link mechanism portion constituted by the
0 prevents it. Therefore, it is possible to prevent the smooth operation of the link mechanism, that is, the wiper device 10 from being hindered. In particular, it is possible to prevent foreign matter such as twigs from accidentally entering the moving range of the link mechanism.

In this wiper device 80, the connecting shaft 2
The peripheral wall 46 of the link cover 40 is directed downward so as to face the connecting and rotating portion of the main lever 14 and the arm head 24 by the connecting lever 2 and the connecting and rotating portion of the sub lever 16 and the arm head 24 by the connecting shaft 26. (Stepped part 66
), And the bent end portion 46B of the connecting shaft extends into the concave groove 82 to cover the connecting rotation portion of the connecting shaft 22 and the connecting shaft 26.

Accordingly, the connecting and rotating portions are not unnecessarily wetted, and the connecting and rotating portions are waterproofed, so that the smooth operation of the link mechanism can be maintained.

As described above, in the wiper device 80 according to the second embodiment, the link mechanism portion of the wiper arm 12 which is of a four-bar type with the main lever 14 and the sub-lever 16 and the arm head 24 to which they are connected. In addition, it is possible to prevent snow or the like from staying or foreign matter from being caught, and to waterproof the connecting and rotating portion between each lever and the arm head 24, and to realize this with a simple structure at low cost.

FIG. 7 is a cross-sectional view showing the configuration of a connecting and rotating portion between the arm head 24 and the main lever 14 of the vehicle wiper device 90 according to the third embodiment of the present invention.

In this wiper device 90, the arm head 2
The basic configuration of the fourth embodiment, the link cover 40 and the like is the same as that of the first embodiment, but a cup washer 92 is disposed between the main lever 14 and the washer 74 and the seal ring 76. The cup washer 92 is formed in a ring shape, and the peripheral edge thereof is bent substantially perpendicularly upward. This cup washer 92 has its central portion sandwiched between the tip of the connecting shaft 22 fixedly caulked to the main lever 14 and the main lever 14,
The connecting shaft 22 and the main lever 14 are integrally fixed. A grease reservoir 94 is provided by the cup washer 92.

Note that the connection rotation portion between the sub lever 16 and the arm head 24 by the other connection shaft 26 is described below.
Since the configuration is similar to that described above, the description is omitted.

In the wiper device 90 having the above structure, the main lever 14, the sub-lever 16 and the arm head 24
If snow or the like adheres or stays in the movement range of the link mechanism portion constituted by the
0 prevents it. Therefore, it is possible to prevent the smooth operation of the link mechanism, that is, the wiper device 10 from being hindered. In particular, it is possible to prevent foreign matter such as twigs from accidentally entering the moving range of the link mechanism.

In the wiper device 90, the connecting shaft 2
The peripheral wall 46 of the link cover 40 is directed downward so as to face the connecting and rotating portion of the main lever 14 and the arm head 24 by the connecting lever 2 and the connecting and rotating portion of the sub lever 16 and the arm head 24 by the connecting shaft 26. (Stepped part 66
And the connection pivoting portion of the connection shaft 22 and the connection shaft 26 is covered. Therefore, the connecting and rotating portions are not unnecessarily wetted, and the connecting and rotating portions are waterproofed, so that the smooth operation of the link mechanism can be maintained.

Further, in the wiper device 90, since the cup washer 92 is mounted on the connecting and rotating portion of each lever and the grease reservoir 94 is provided, grease for lubricating the connecting and rotating portion may flow out. Absent. Therefore, in addition to the fact that the connecting and rotating portion between each lever and the arm head 24 can be waterproofed by the peripheral wall 46 of the link cover 40 as described above, the smooth operation of the link mechanism can be maintained more reliably.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of a connecting rotation portion between an arm head and a main lever of a wiper device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of an arm head, a link cover, and peripheral components of the wiper device according to the first embodiment of the present invention.

FIG. 3 is a sectional view showing a configuration of an arm head, a link cover, and peripheral components of the wiper device according to the first embodiment of the present invention.

FIG. 4 is a plan view showing the overall configuration of the wiper device according to the first embodiment of the present invention.

FIG. 5 is a front view showing a state in which the wiper device according to the first embodiment of the present invention is applied to a vehicle.

FIG. 6 is a cross-sectional view illustrating a configuration of a connecting rotation part of an arm head and a main lever of a wiper device according to a second embodiment of the present invention.

FIG. 7 is a cross-sectional view illustrating a configuration of a connecting rotation portion between an arm head and a main lever of a wiper device according to a third embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 wiper device 12 wiper arm 14 main lever 16 sub lever 18 pivot shaft (rotating shaft) 20 support shaft 22 connecting shaft 24 arm head 26 connecting shaft 36 wiper blade 40 link cover 42 mounting portion 44 covering portion 46 peripheral wall (side wall) 46A Protruding portion 46B Tip bent portion 66 Stepped portion 68 Connecting hole 80 Wiper device 82 Concave groove 90 Wiper device 92 Cup washer 94 Grease pool

Claims (3)

(57) [Claims] 1. A main lever which is connected to a rotating shaft provided on a vehicle body and rotates together with the rotating shaft, and is rotatably supported by a supporting shaft provided on the vehicle body at a distance from the rotating shaft. a sub-lever that is, the main lever of the tip and each arm head and, quadric link has a rotatably connected via a connecting shaft above the tip of the sub-lever is formed, wiper tip The wiper arm to which the blade is connected and the rotating shaft are separately provided on the vehicle body and synchronized with the rotating shaft
And connected to a second rotating shaft that rotates.
A second arm head together rotated, the second word on the tip while being connected to the second arm head
A second wiper arm to which the wiper blade is connected , wherein at least one of the main lever and the sub lever is provided.
Either one has a step that protrudes toward the arm head
And the connecting shaft is connected to the stepped portion.
Are sintered, with a link cover covering a moving range of the main lever and the sub lever is mounted above the arm head, the link cover the sidewalls said main lever and
An extension portion extending to at least one side of the sub- lever;
2 By the connecting shaft on the closing direction side of the wiper blade
At least one of the main lever and the sub lever
A connection part with either one of the link covers
Is formed on the second wiper blade side.
A wiper device for a vehicle. 2. The vehicle according to claim 1, wherein said shaft is connected to a rotating shaft provided on a vehicle body.
A main lever that rotates together with the rotation shaft, and the rotation shaft
A pivotally supported pivot is provided on the vehicle body at a distance.
Sub lever, the tip of the main lever and the
Turn each of the sub levers above the tip of
An arm head rotatably connected to
Is formed and the wiper blade is connected to the tip.
The vehicle wiper apparatus having a Paa arm, at least one of the main lever and the sub-lever
Either one has a step that protrudes toward the arm head
And the connecting shaft is connected to the stepped portion.
And attached above the arm head to
Link cover covering the moving range of the bar and sub-lever
The link cover has a side wall formed by the main lever and
Extends to at least one side of the sub-lever
The main lever and the sub lever by the connecting shaft
The step in the connection with at least one of
The attached portion is more than the tip of the extending portion of the link cover.
A wiper device for a vehicle, wherein the wiper device is disposed on a side of the arm head . 3. The arm head around at least one of the main lever and the sub lever around the connection shaft.
Any protruding portion which projects to one side is formed, between the projecting portion and the stepped portion of the arm head, mounted cup washer periphery a ring shape surrounding the being bent the projecting portion 3. The vehicle wiper device according to claim 1, wherein a grease reservoir is provided.