JP3228713B2 - 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 the levers and the like with the engine hood of the vehicle body so as not to be exposed to the outside, but 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]

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. It is an object of the present invention to provide a vehicle wiper device which can prevent dripping or foreign matter from being caught and can maintain its function even under severe snowfall conditions, and can realize this at a low cost with a simple structure. It is.

[0011]

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 always rotating together with the rotating shaft; A sub-lever rotatably supported by a support shaft provided on the vehicle body at a predetermined distance from the armature; and an arm head to which the tip of the main lever and the tip of the sub-lever are rotatably connected. And a wiper device provided with a wiper arm to which a wiper blade is connected at a tip thereof , a mounting portion mounted on the arm head, and a mounting portion from the mounting portion to a position directly above the main lever and the sub lever. And a cover portion extending to cover the main lever and the sub-lever, and the mounting portion elastically engages with the arm head. Width The number of engaging pieces of the arm head
It is characterized by being provided in a staggered manner without facing each other in the direction .

In the vehicle wiper device according to the first aspect, the main lever is connected and fixed to the rotation shaft, and the sub lever is rotatable about a support shaft provided at a predetermined distance from the rotation shaft. It is supported by. 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 rotating shaft,
The arm head to which the sub-lever is connected rotates while relatively approaching and separating from the rotation 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, 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 vehicle wiper device according to the first aspect, a link cover is provided integrally with the arm head. The link cover has a mounting portion attached to the arm head, and a covering portion extending from the mounting portion directly above the main lever and the sub lever covers the main lever and the sub lever.

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 does not cause a hindrance to the smooth operation of the link mechanism, that is, the wiper device. Also, it is possible to prevent foreign matter such as twigs from accidentally entering the moving range of the link mechanism.

In the link cover, a plurality of locking pieces are provided on the mounting portion in a staggered manner without being opposed to each other in the width direction of the arm head, and the locking pieces are elastically connected to the arm head. Since it is configured to be attached by joining, a stable mounting state can be obtained with a small number of locking pieces along the longitudinal direction of the arm head.

Further, since the link cover has a simple structure provided on the arm head as described above, the cost is low, and the link cover is not a fixed cover like an engine hood, but is fixed to the arm head and moves together with the wiping operation. So
The moving range of the link mechanism can be covered with a small cover.

As described above, in the vehicle wiper device according to the first aspect, snow or the like stays in the link mechanism portion of the wiper arm which is a four-joint link type with the main lever and the sub-lever and the arm head to which they are connected. It is possible to prevent dripping or foreign substances from being caught, and to achieve this with a simple structure at low cost.

According to a second aspect of the present invention, in the wiper device for a vehicle according to the first aspect, the arm head is provided with a locking recess in which a locking piece provided on the mounting portion is engaged. Are formed, and the locking pieces engage with the locking recesses to fix the link cover to the arm head.

In the wiper device for a vehicle according to the second aspect, the locking piece provided on the mounting portion is engaged with the locking concave portion formed on the arm head to thereby link the link cover in the longitudinal direction and the width direction of the arm head. Can be mounted in a state in which the movement is prevented, so that the structure is simple and reliable assembling is possible, and the assembling workability is excellent.

According to a third aspect of the present invention, in the vehicle wiper device according to the first or second aspect, the locking piece is located at a position inwardly separated from a general peripheral wall surface of the mounting portion. It is characterized in that it is erected independently of the general peripheral wall.

In the wiper device for a vehicle according to the third aspect, the locking piece is erected independently of the general peripheral wall of the mounting portion at a position spaced inward from the general peripheral wall surface of the mounting portion. Therefore, when attaching the link cover (mounting part),
The locking piece is easily bent to engage with the locking recess of the arm head. Therefore, the assemblability of the link cover (mounting portion) is improved.

On the other hand, even if the covering portion is pushed up by ice or the like and a couple (force for detaching the mounting portion from the arm head) acts on the general peripheral wall of the mounting portion, it is independently erected. It is difficult for this couple to be transmitted to the locking piece. Therefore, it is difficult for the locking pieces to be detached from the locking recesses, and for the mounting portion, that is, the link cover, to be hard to come off the arm head.

According to a fourth aspect of the present invention, in the wiper device for a vehicle according to the second or third aspect, the locking recesses do not face each other in the width direction of the arm head and are staggered. A plurality of the locking pieces,
It is characterized in that it is provided on the mounting portion corresponding to the locking concave portion.

In the wiper device for a vehicle according to the fourth aspect, a plurality of locking recesses of the arm head are provided in a zigzag manner without being opposed to each other in the width direction of the arm head, and the locking pieces of the link cover are also staggered correspondingly. Since the locking recesses and the locking pieces are required to have the required thickness, they are easily provided in the mounting portion, and the degree of freedom in design is improved.

According to a fifth aspect of the present invention, in the vehicle wiper device according to the second, third or fourth aspect, the locking piece is disengaged from the locking recess. It is characterized in that a stopper member is provided to prevent the member from bending toward the surface.

[0027] In the wiper device for a vehicle according to the fifth aspect, a stopper member is provided on the mounting portion of the link cover, and the locking piece is bent in a direction to be separated from the locking recess of the arm head. Has been blocked. Therefore, the engagement between the locking piece and the locking recess is not released, and the mounting portion, that is, the link cover is not unnecessarily detached from the arm head.

According to a sixth aspect of the present invention, in the wiper device for a vehicle according to the fifth aspect, the stopper member is mounted between the locking piece and a general peripheral wall of the mounting portion. And a spacer stopper.

In the wiper device for a vehicle according to the sixth aspect, the spacer stopper as the stopper member is mounted between the locking piece and the general peripheral wall of the mounting portion. Therefore, the space between the general peripheral wall of the mounting portion and the locking piece independently erected at a position separated from the general peripheral wall is eliminated (the general peripheral wall and the locking piece form a spacer stopper. Through the integration). As a result, the locking piece is prevented from flexing in a direction in which the locking piece is detached from the locking recess of the arm head,
The engagement between the locking piece and the locking recess is not released, and the mounting portion, that is, the link cover is not unnecessarily detached from the arm head.

According to a seventh aspect of the present invention, in the vehicle wiper device according to the sixth aspect, the spacer stopper has a claw portion that engages with a general peripheral wall of the mounting portion. The claw portion is fixed to the mounting portion by engaging with a general peripheral wall of the mounting portion.

In the wiper device for a vehicle according to the present invention, the claw portion formed on the spacer stopper is engaged with the general peripheral wall of the mounting portion, and the spacer stopper is fixed to the mounting portion.
Therefore, the spacer stopper can be easily attached after attaching the link cover (mounting portion) to the arm head, and the spacer stopper is not unnecessarily detached after attaching the spacer stopper. Therefore, the fixed state of the link cover can be reliably maintained.

According to an eighth aspect of the present invention, in the wiper device for a vehicle according to the fifth aspect, the stopper member includes a locking piece located on the side of the covering portion of the locking piece. A pair of fitting portions respectively fitted in a close contact state between the general peripheral wall of the mounting portion, and the locking piece located on the side opposite to the covering portion and the general peripheral wall of the mounting portion. And a connecting portion for connecting the pair of fitting portions, and is formed in a substantially U-shaped cross section as a whole, and serves as a holding stopper for holding the locking piece integrally with the arm head. .

In the wiper device for a vehicle according to the eighth aspect, the sandwiching stopper as the stopper member comprises a pair of fitting portions and a connecting portion for connecting the fitting portions, and is formed to have a substantially U-shaped cross section as a whole. ing. The pair of fitting portions are fitted between the locking pieces and the general peripheral wall of the mounting portion, respectively, and integrally hold the locking pieces together with the arm head.

Therefore, the locking piece is forcibly held in the locking recess of the arm head in the engaged state, and the engagement between the locking piece and the locking recess is not released. The link cover is not unnecessarily detached from the arm head.

According to a ninth aspect of the present invention, in the wiper device for a vehicle according to the eighth aspect, the holding stopper has a claw projection formed on the connecting portion for engaging with the arm head. The claw projection is fixed to the arm head by engaging with the arm head.

In the wiper device for a vehicle according to the ninth aspect, the claw projection formed on the holding stopper is engaged with the arm head, and the holding stopper is fixed. Therefore, after the link cover (mounting portion) is attached to the arm head, the clamping stopper can be easily attached, and the clamping stopper does not needlessly come off after the clamping stopper is attached. Therefore, the fixed state of the link cover can be reliably maintained.

[0037]

FIG. 3 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 rotating shaft provided on the vehicle body, 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.
The arm head 24 is rotatably connected to the distal end of the sub-lever 16 by a connecting shaft 22, and the arm head 24 is rotatably connected to the distal end of the sub-lever 16 by a connecting shaft 26. I have.

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 at 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 is attached to the arm head 24.

FIG. 1 is a perspective view showing the structure of the link cover 40 and the arm head 24.
FIG. 2 is a sectional view showing the configuration of the link cover 40 and the arm head 24. Note that in FIGS. 1 and 2, when the state of FIG. 3 is set to “top”, 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
The locking recesses 54 are provided in a staggered manner without facing 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.

The engagement of the locking pieces 52 with the locking recesses 54 allows the link cover 40 (mounting portion 42) to be prevented from moving in the longitudinal direction and the width direction of the arm head 24. It is a structure fixed to.

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 so as to cover the arm head 24 from above, and the coating 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 positioned outside the vehicle body), and covers a link mechanism portion including the main lever 14 and the sub-lever 16 and the like.

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 engine hood F (see FIG. 4) of the vehicle body. 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.

A spacer stopper 60 as a stopper member is mounted on the link cover 40 (arm head 24) having the above configuration. Spacer stopper 60
Is formed in a thin plate shape as a whole. Of the plurality of locking pieces 52 described above, the locking piece 52 located on the side of the peripheral wall 48 (the covering portion 44) and the peripheral wall 48 are in close contact with each other. It is installed.

Further, a claw portion 62 is formed on one side surface 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.

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

In the vehicle wiper device 10 using the wiper arm 12 having the above-described configuration, the wiper arm 12 and the wiper blade 36 reciprocate with the pivot shaft 18 to remove raindrops and the like on the windshield glass surface. Dispel.

In this case, when the main lever 14 rotates together with the pivot shaft 18, the arm head 24 to which the sub-lever 16 is connected rotates while relatively moving toward and away from the pivot shaft 18. As a result, the overall length of the wiper arm 12 decreases. It expands and contracts (the support position of the arm head 24 is displaced, and its entire 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 body with respect to the main lever 14 and the sub-lever 16, and is provided by the engine hood F of the vehicle body 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, the smooth operation of the link mechanism, that is, the wiper device 10 is not hindered. Particularly, 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 pieces 52 are erected independently from the peripheral walls 46 and 48 of the mounting portion 42 at positions separated from the peripheral walls 46 and 48 by a predetermined distance inward. 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).

Further, a plurality of locking recesses 54 formed in the arm head 24 are provided in a zigzag manner without being opposed to each other in the width direction of the arm head 24.
0 (mounting part 42) are also provided in a staggered manner, so that the locking recesses 54 and the locking pieces 5
2, it is easy to secure the required thickness dimension, and the degree of freedom in design is improved. Furthermore, a stable mounting state of the link cover 40 can be obtained by a small number of the locking pieces 52 along the longitudinal direction of the arm head 24.

In this wiper device 10, the spacer cover 60 is mounted on the mounting portion 42 of the link cover 40 mounted on the arm head 24, and the locking piece 52 is used to lock the arm head 24. Deflection toward the direction of detaching from the recess 54 is prevented.

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 provided in the mounting portion 4 of the link cover 40 by inserting a claw 62 formed on the side surface into a locking hole 64 formed on the peripheral wall 48.
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.

As described above, in the wiper device 10 according to the first embodiment, the link mechanism portion of the wiper arm 12 which is formed into a four-bar linkage by 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 stagnation of snow and the like and foreign substances from being caught, and to maintain its function even under severe snowfall conditions. Furthermore, since the structure is simple, the cost is low, and since it is not necessary to cover the entire link mechanism with the engine hood F of the vehicle body, the invention can be applied to a small vehicle, for example.

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. 5 is a perspective view showing the configuration of the vicinity of the arm head 24 and the link cover 40 of the vehicle wiper device 70 according to the second embodiment of the present invention, and FIG. The configuration of the part is shown in a sectional view.

In the wiper device 70, the arm head 2
The configuration of the link cover 4 and the link cover 40 is the same as that of the first embodiment.
0 (arm head 24).

The sandwiching stopper 72 is constituted by a pair of fitting portions 74 and 76 and a connecting portion 78 for connecting the fitting portions 74 and 76 by bending a thin plate material. Is formed. One of the fitting portions 76 is mounted in close contact with the locking piece 52 located on the side of the surrounding wall 48 (the covering portion 44) and the surrounding wall 48 among the plurality of locking pieces 52 described above, and The other fitting portion 74 is attached between the locking piece 52 located on the side of the peripheral wall 46 (the side opposite to the covering portion 44) and the peripheral wall 46 in close contact with each other. Therefore, the holding stopper 72 is configured to integrally hold the locking pieces 52 located on both sides of the arm head 24 together with the arm head 24.

Further, a claw projection 80 is formed so as to protrude from the connecting portion 78 of the holding stopper 72, and
4 can be fitted into a locking hole 82 formed in the same. That is, the nipping stopper 72 is integrally fixed to the arm head 24 by fitting the claw projection 80 into the locking hole 82.

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

In the vehicle wiper device 70 having the above structure, when the main lever 14 rotates together with the pivot shaft 18, the arm head 24 to which the sub-lever 16 is connected also rotates while relatively moving toward and away from the pivot shaft 18. As a result, the entire length of the wiper arm 12 expands and contracts (the arm head 2).
The support position of No. 4 is displaced, and the entire length apparently expands and contracts). As a result, at the predetermined wiping position, the wiper arm 1
The total length of 2 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 70, the 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 body with respect to the main lever 14 and the sub-lever 16, and is provided by the engine hood F of the vehicle body 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, the link mechanism, that is, the smooth operation of the wiper device 70 is not hindered. Particularly, 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 while being prevented from moving in the longitudinal direction and the width direction. Further, the locking pieces 52 are moved inward from the peripheral wall 46 and the peripheral wall 48 of the mounting portion 42 by a predetermined distance. These peripheral walls 46, 48 are spaced apart from each other.
When the link cover 40 (mounting portion 42) is attached, the locking piece 52 is easily bent and engages with the locking concave portion 54 of the arm head 24. Therefore, the assemblability of the link cover 40 (the mounting portion 42) is improved.

Further, a plurality of locking recesses 54 formed in the arm head 24 are provided in a zigzag pattern without facing each other in the width direction of the arm head 24.
0 (mounting part 42) are also provided in a staggered manner, so that the locking recesses 54 and the locking pieces 5
2, it is easy to secure the required thickness dimension, and the degree of freedom in design is improved. Furthermore, a stable mounting state of the link cover 40 can be obtained by a small number of the locking pieces 52 along the longitudinal direction of the arm head 24.

Here, in the wiper device 70, a pinching stopper 72 is mounted on the mounting portion 42 on the link cover 40 mounted on the arm head 24.
The locking piece 52 is prevented from flexing in a direction in which the locking piece 52 is separated from the locking recess 54 of the arm head 24.

That is, the mounting portion 42 of the link cover 40
In, the holding stoppers 72 are integrally fixed together with the locking pieces 52 located on both sides of the arm head 24 together with the arm head 24 and fixed. Therefore, each locking piece 52 located on both sides of the arm head 24 is forcibly held in the engaged state with the locking recess 54 of the arm head 24, and the locking piece 52 is 54
From being deflected in the direction away from the main body. Therefore, the engagement between the locking pieces 52 and the locking recesses 54 is not released, and the mounting portion 42, that is, the link cover 40, does not needlessly come off the arm head 24.

Further, the holding stoppers 72 are formed by fitting the claw projections 80 formed on the connecting portions 78 into the locking holes 82 formed on the arm head 24, so that the fitting portions 74, 76 are provided.
Is fixed (prevented) integrally to the arm head 24 in a state of being mounted between the locking piece 52 and the peripheral walls 46, 48, so that the holding stopper 72 itself does not come off unnecessarily. Therefore, the fixed state of the link cover 40 can be reliably maintained.

As described above, in the wiper device 70 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 and the like from staying and foreign substances from being trapped, to maintain its function even under severe conditions such as snowfall, and to reduce the cost because the structure is simple.

In each of the above embodiments, the locking piece 52 formed on the mounting portion 42 of the link cover 40 is
The link cover 40 (the mounting portion 42) is fixed to the arm head 24 by engaging with the locking concave portion 54 formed in the arm head 24, but is not limited thereto.
Other fixing means can be used in combination.

For example, as shown in FIG.
The claw protrusion 84 is formed on the mounting portion 42 (upper wall 50) of the arm head 24, and the claw protrusion 84 is formed in the locking hole 8 formed in the arm head 24.
6 so as to be integrally fixed to the arm head 24 (prevented from falling off). In this case, the attached and fixed state of the link cover 40 can be maintained more reliably.

In each of the above embodiments, the locking piece 52 (the locking recess 54 formed on the arm head 24) formed on the mounting portion 42 of the link cover 40 extends in the width direction of the arm head 24. The arrangement is such that the locking pieces 52 and the locking recesses 54 are not staggered, but are not limited to each other. May be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of an arm head, a link cover, and peripheral components of a wiper device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating 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 plan view showing the overall configuration of the wiper device according to the first embodiment of the present invention.

FIG. 4 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. 5 is a perspective view illustrating a configuration of an arm head, a link cover, and peripheral components of a wiper device according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view illustrating a configuration of an arm head, a link cover, and peripheral components of a wiper device according to a second embodiment of the present invention.

FIG. 7 is a sectional view showing another fixing means of the arm head and the link cover of the wiper device according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Wiper device 12 Wiper arm 14 Main lever 16 Sublever 18 Pivot shaft (rotation axis) 20 Support shaft 24 Arm head 36 Wiper blade 40 Link cover 42 Mounting part 44 Covering part 52 Locking piece 54 Locking concave part 60 Spacer stopper (stopper member) ) 62 claw portion 64 locking hole 70 wiper device 72 clamping stopper (stopper member) 74 fitting portion 76 fitting portion 78 connecting portion 80 claw projection 82 locking hole

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60S 1/04-1/44

Claims (9)

(57) [Claims] 1. A main lever which is connected to a rotating shaft provided on a vehicle body and always rotates together with the rotating shaft, and is rotatable about a supporting shaft provided on the vehicle body at a predetermined distance from the rotating shaft. , A four-bar link is formed , and a wiper blade is connected to the distal end of the main lever and an arm head to which the distal end of the sub lever is rotatably connected. In a vehicle wiper device provided with a wiper arm, a mounting portion attached to the arm head, and a covering portion extending from the mounting portion to directly above the main lever and the sub lever, and covering the main lever and the sub lever, A plurality of locking pieces elastically engaged with the arm head do not face each other in the width direction of the arm head.
A vehicle wiper device provided in a staggered manner . 2. The arm head is provided with a locking recess in which a locking piece provided in the mounting portion is engaged, and the locking piece engages with the locking recess to form the link cover. The vehicle wiper device according to claim 1, wherein the wiper device is fixed to the arm head. 3. The device according to claim 1, wherein the locking piece is erected independently of the general peripheral wall at a position spaced inward from a general peripheral wall of the mounting portion. Item 4. A vehicle wiper device according to item 2. 4. A plurality of locking recesses are provided in a zigzag pattern without facing each other in the width direction of the arm head, and the locking pieces are provided in the mounting portion corresponding to the locking recesses. The vehicle wiper device according to claim 2 or 3, wherein: 5. A stopper member for preventing the locking piece from bending in a direction in which the locking piece is separated from the locking recess.
The wiper device for a vehicle according to the above. 6. The wiper device for a vehicle according to claim 5, wherein the stopper member is a spacer stopper mounted between the locking piece and a general peripheral wall of the mounting portion. 7. The spacer stopper is formed with a claw portion that engages with a general peripheral wall of the mounting portion, and is fixed to the mounting portion by engaging the claw portion with a general peripheral wall of the mounting portion. The wiper device for a vehicle according to claim 6, wherein: 8. The stopper member is located between the locking piece located on the side of the covering portion of the locking piece and a general peripheral wall of the mounting portion, and on the opposite side to the covering portion. Between the locking piece and the general peripheral wall of the mounting portion, a pair of fitting portions respectively fitted in close contact with each other, and a connecting portion for connecting the pair of fitting portions, and have a substantially U-shaped cross section as a whole. The wiper device for a vehicle according to claim 5, wherein the wiper device is formed as a holding stopper that integrally holds the locking piece together with the arm head. 9. The nipping stopper, wherein a claw projection for engaging with the arm head is formed on the connecting portion, and the claw projection is fixed to the arm head by engaging with the arm head. The vehicle wiper device according to claim 8, wherein: