JPH06270768A - Wiper for vehicle - Google Patents

Abstract

PURPOSE:To reduce unwiped parts by providing a pivot for oscillating an arm head through a connecting means, and an inclining means for inclining the arm head in the oscillating direction by a pivot rotating means in the upper and lower reversing positions of a wiper arm. CONSTITUTION:The power of a wiper motor 64 is transmitted to second levers 61 from a link rod 62, and an arm head 11b and a wiper arm 12B are oscillated from a pivot 50 through a second connecting member 48 and a first connecting member 47. At the same time, the power is transmitted to first levers 60 through connecting rods 63 so as to rotate rotary shafts 30 and first gears 33. In this case, because of supporting the pivot 50 inclined to the rotational center 40a of a bearing member 40, when the bearing member 40 is rotated through the first gear 33 and the second gear 46, a ring member 43 is rotated around the pivot 5 at a D-point so as to incline the arm head 11B forcibly in the oscillating direction. The wiper arm 12B and the wiper blade 13 are also inclined.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle wiper, and more particularly to a wiper for inclining a wiper blade for improving wiping performance.

[0002]

2. Description of the Related Art Conventionally, in a vehicle wiper, a wiper blade blade driver for wiping a windshield.
However, since the wiper blade does not incline in the swinging direction, the contact state between the windshield and the blade driver deteriorates, and unwiping remains on the windshield, resulting in a problem that the wiping performance cannot be secured. As a countermeasure against this, there has been proposed a wiper (for example, Japanese Utility Model Laid-Open Publication No. 1-98054) having a degree of freedom in a swinging direction when a wiper blade having a blade driver is attached to a wiper arm. As shown in FIG. 10, in this wiper, a clip 103 is attached to the wiper blade 101 by a first shaft 102 provided in a direction perpendicular to the longitudinal direction of a wiper blade 101 having a blade driver 100, The clip 103 is rotatably attached to the tip of the wiper arm 105 by a second shaft 104 provided in a direction orthogonal to the first shaft 102 (a swinging direction). Therefore, the wiper blade 101 has a degree of freedom in the swinging direction with respect to the wiper arm 105.

[0003]

The conventional wiper described above is
Since the wiper blade having the blade driver is attached to the wiper arm with a degree of freedom in the swinging direction, the blade driver tends to incline in the swinging direction. However, if the blade driver is deformed by being left at a high temperature or the blade driver is hardened by being left at a low temperature, the conventional wiper forcibly changes the inclination direction of the wiper blade having the blade driver. However, there is a problem that the blade driver may not be tilted in the swinging direction at the upper and lower inverted positions of the wiper arm.

In view of the above-mentioned problems, the present invention is designed to incline the wiper blade having the blade driver in the swinging direction by the external force at the upper and lower inverted positions of the wiper arm. An object of the present invention is to provide a wiper for a vehicle, which reduces unwiping residue when a driver wipes a windshield and has improved wiping performance.

[0005]

In order to achieve the above object, the present invention provides a wiper blade having a blade driver, a wiper arm holding the wiper blade at one end, and the wiper arm at one end. An arm head having a connecting portion for holding the other end of the arm and a circular hole at the other end, and one end rotatably connected to an intermediate portion between the connecting portion and the hole of the arm head. Connecting means, a pivot shaft fixed to the other end of the connecting means for swinging the arm head through the connecting means, a rotating means for rotating the pivot shaft, and a wiper arm. The technical means is employed, which comprises an inclining means for forcibly inclining the arm head in the swinging direction by the power of the rotating means at the upper reversing position and the lower reversing position.

[0006]

According to the present invention, since the above-mentioned technical means is provided, the pivot shaft is rotated by the rotating means. Since the pivot shaft swings the arm head through the connecting means, the wiper arm held by the arm head also swings. At the upper and lower reversing positions of the wiper arm, the tilting means forcibly tilts the arm head in the swinging direction by the power of the rotating means, so that the wiper arm held at one end of the arm head. The wiper blade held at one end of the wiper arm and the wiper arm also inclines in the swinging direction.

[0007]

As described above, according to the vehicle wiper of the present invention, the tilting means forcibly moves the arm head by the power of the rotating means at the upper reversing position and the lower reversing position of the wiper arm. Since the wiper blade is tilted in the swinging direction and tilted in the swinging direction, the blade driver can be surely tilted in the swinging direction. Therefore, it is possible to reduce the amount of wiping residue when the blade driver wipes the windshield, and it is possible to improve the wiping performance of the vehicle wiper.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 shows an automobile wiper 1 according to an embodiment of the present invention.
A schematic overall configuration diagram of 0 is shown. The wiper 10 is of a so-called parallel interlocking type which is basically composed of a left wiper 10A and a right wiper 10B having the same structure. The left and right wipers are arm heads 11A and 11B, wiper arms 12A and 12B, wiper blades 13A and 13B, respectively.
Is equipped with. By the rocking of the arm heads 11A and 11B, the wiper blades 13A and 13B respectively rock between the lower reversing position C and the upper reversing position D to wipe off raindrops and the like adhering to the window glass 15.

Here, the left wiper 10A and the right wiper 10
Since B has basically the same structure, the right wiper 10B will be described below. As shown in FIG. 6, the wiper blade 13B is provided with a blade driver 14. Further, as shown in FIGS. 1 and 2, a holder 22 formed by die casting of aluminum is fixed to a substrate 20 of the vehicle body with bolts 23.
The holder 22 has a box shape having an opening 22a in a direction opposite to the substrate 20 side, and an outer cylindrical portion 24a protruding toward the substrate 20 side and a direction opposite to the outer cylindrical portion 24a on a surface of the substrate 20 side. First through hole 2 formed of an inner cylindrical portion 24b
4 and an outer cylindrical portion 25 having an outer diameter larger than that of the first through hole 24 and protruding in the same direction as each cylindrical portion of the first through hole 24.
a and the second through hole 25 including the inner cylindrical portion 25b,
It is formed integrally with the holder 22. The opening 22a is
Cover member 26 having first hole 26a and second hole 26b
It is blocked by.

A rotary shaft 30 formed by cutting a steel material is inserted into the first through hole 24 of the holder 22, and the rotary shaft 30 has a C-shaped spring 31 attached to one end thereof.
This prevents the shaft from falling off and is rotatably supported in the first through hole 24. The other end of the rotary shaft 30 penetrates the first hole 26a of the cover member 26,
The outside (lower side in FIG. 1) of the. And
On the outer circumference of the rotary shaft 30, a first gear 33 formed by injection molding of a resin having high mechanical strength (for example, polyacetal) is formed. The first gear 33 is fixed to the rotary shaft 30 by press fitting the rotary shaft 30 and rotates integrally with the rotary shaft 30.

Further, in the second through hole 25 of the holder 22,
Resins with high mechanical strength (for example, polyacetate
The substantially cylindrical bearing member 40 formed by injection molding of (1) is inserted, and the bearing member 40 is prevented from falling off in the axial direction by the C-shaped spring 41 assembled at one end thereof. It is rotatably supported with respect to.
The other end of the bearing member 40 has the second hole 26 of the cover member 26.
It penetrates through b and protrudes to the outer side (lower side in FIG. 1) of the cover member 26.

The rotation center 40a of the bearing member 40
A pivot shaft 50 formed by cutting a steel material is rotatably supported at a position inclined with respect to. The pivot shaft 50 has a threaded portion 51 formed at the end and a threaded portion 5
A cylindrical portion 52 having an outer diameter larger than 1 and an inclined portion 53 connecting the screw portion 51 and the cylindrical portion 52, and a C-shaped spring 54 attached to the end of the cylindrical portion 52 prevents the axial portion from falling off. Has been done. In addition, the substrate 2 of the bearing member 40
The 0-side end portion has an arc-shaped groove portion 4 of an annular member 43 described later.
A cylindrical convex portion 42 that engages with the bearing 4 is formed integrally with the bearing member 40. A second gear 46 meshing with the first gear 33 is provided on the outer periphery of the bearing member 40.
It is formed integrally with.

The arm head 11B has a connecting portion 16 for holding the end of the wiper arm 12B at one end and a circular hole 17 at the other end, which is integrally molded by aluminum die casting. There is. A hole 18 is formed at an intermediate portion between the connecting portion 16 and the hole 17 so as to open toward the longitudinal hole 17 side of the arm head 11B. The first columnar portion 47 a of the first connecting member 47 is inserted into the hole 18, and the first columnar member 4
7a is rotatably supported by the arm head 11B. In addition, the second columnar portion 47b having an outer diameter smaller than that of the first columnar portion 47a is formed in the hole 48 of the columnar portion 48a of the second connecting member 48.
The second columnar portion 47b is rotatably supported by the second connecting member 48. Then, the second connecting member 48
The plate-shaped portion 48c is fixed to the inclined portion 53 of the pivot shaft 50 by a nut 55. As described above, the first connecting member 4 including the first columnar portion 47a and the second columnar portion 47b.
7 is integrally formed by cutting steel, and has a cylindrical portion 48a.
The second connecting member 48 including the plate-shaped portion 48c and the plate-shaped portion 48c is integrally formed by die casting of aluminum. And
The connecting means in this embodiment comprises a first connecting member 47 and a second connecting member 48.

A circular hole 17 of the arm head 11B is also provided.
Is rotatably supported by an annular member 43 formed by injection molding of a resin having high mechanical strength (for example, polyacetal), and the annular member 43 is pivoted at a position inclined with respect to the pivot shaft 50. 50 is rotatably supported. An arcuate groove portion 44 is formed on the bottom surface of the annular member 43 on the bearing member 40 side. Abutting portions 44 with which the convex portions 42 abut, respectively, at both circumferential ends of the groove portion 44.
a and 44b are formed, the contact portion 44a corresponds to the upper reversal position D of the wiper arm 12B and the wiper blade 13B, and the contact portion 44b corresponds to the lower reversal position C.
The rotation angle of the bearing member 40 is a predetermined value (wiper arm 12
B reaches the front position J of the upper reversal position D or the front position K of the lower reversal position C shown in FIG. 5) until the protrusion 42 rotates the bearing member 40 in the groove 44. When the rotation angle of the bearing member 40 reaches a predetermined value and the convex portion 42 abuts the abutting portion 44a or 44b,
The rotational force of the bearing member 40 is transmitted to the annular member 43,
The annular member 43 rotates about the pivot shaft 50.

Further, as shown in FIGS. 1 and 3, the rotating shaft 3
One end of the first lever 60 is fixed to the end portion of the cover member 26 of 0 which protrudes to the outside, and when the first lever 60 swings, the rotation shaft 30 rotates. One end of a second lever 61, which serves as a rotating means, is fixed to an end portion of the pivot shaft 50 projecting to the outside of the cover member 26.
When 1 swings, the pivot shaft 50 rotates. Second lever
A link rod 62, which serves as a rotating means, is rotatably connected to the other end of 61, and the link rod 62 is further connected to the wiper motor 6 via a left wiper 10A as shown in FIG.
4 crank arms 65. For this reason,
The rotational force of the wiper motor 64 is transmitted to the second lever 61 via the link rod 62. On the other hand, the first lever-60
The other end of the connecting rod 63 is rotatably connected to one end of the connecting rod 63, and the other end of the connecting rod 63 is connected to the second lever.
It is rotatably connected to an intermediate portion of 61. For this reason,
When the second lever 61 swings, this swing causes the connecting rod 6 to move.
Is transmitted to the first lever 60 via the third lever 60.
Oscillates in the same direction as the second lever 61.

Next, the operation of this embodiment having the above-mentioned structure will be described. The right wiper 10B (wiper 1 having the above configuration
In 0), when the wiper is operating, the rotational force of the crank arm 65 of the wiper motor 64 is transmitted to the second lever 61 via the link rod 62, and the second lever 61 is swung. The pivot shaft 50 is rotated by the swing of the second lever 61, and the pivot shaft 50 swings the arm head 11B via the second connecting member 48 and the first connecting member 47 by this rotational force. Therefore, the wiper arm 12B held by the arm head 11B also swings. At the same time, the rotational force of the wiper motor transmitted to the second lever 61 is also transmitted to the first lever 60 via the connecting rod 63. Therefore, the first lever 60 swings in the same direction as the second lever 61 swings, and the rotary shaft 30 is rotated.
The first gear 33 is rotated.

Next, the operation of each member when the wiper arm 12B and the wiper blade 13B are swung from the lower reversal position C to the upper reversal position D will be described with reference to FIG. 7A to 7G are views viewed from the same direction as FIG. 5. E1-E
Reference numeral 4 denotes the swing position of the wiper blade 13B, which is F1 to F.
4 is a position of the pivot shaft 50 corresponding to each swing position of the wiper blade 13B, and G1 to G4 are wiper blades 13B.
The positions of the convex portion 42 of the bearing member 40 and the groove portion 44 of the annular member 43 corresponding to the respective rocking positions are shown. Also, H1 to H
4 is a view showing the tilting direction of the arm head 11B at each swing position of the wiper blade 13B (a view from the direction in which the pivot shaft 50 on the wiper arm 12B longitudinal pivot shaft 50 side can be seen vertically). is there. And 50 of F1-F4
Reference character a indicates the position of the end portion of the pivot shaft 50 on the arm head 11B side, reference character 50b indicates the position of the end portion on the second lever 61 side, and reference character 50c indicates the center line of the pivot shaft 50.

When the wiper blade 13B swings from the lower reversing position C to the front position J of the upper reversing position D (E1 to E3) by the rotation of the pivot shaft 50, the first gear 33 also rotates. Therefore, the second gear 46 that meshes with the first gear 33
Is also rotated. Then, along with this rotation, the bearing member 4
0 rotates, but from the lower reversal position C to the front position J of the upper reversal position D, the convex portion 42 of the bearing member 40 has the annular member 4
3 in the groove portion 44 (G1 to G3), and the bearing member 4
The convex portion 42 of 0 is the contact portion 44a of the groove portion 44 of the annular member 43.
The annular member 43 does not rotate because it does not abut. Therefore, the pivot shaft 50 rotatably supported by the bearing member 40 is not affected by the annular member 43 (H1 to H1).
H3), the arm head 11B is swung through the second connecting member 48 and the first connecting member 47 to move the arm head 11B.
Wiper arm 12B and wiper blade 1
3B also swings. At this time, the second connecting member 48, the first connecting member 47, and the annular member 43 do not operate between the respective members and between the arm head 11B, but operate integrally with the arm head 11B. is doing.

Further, in the case of the present embodiment, since the pivot shaft 50 is rotatably supported at a position inclined with respect to the rotation center 40a of the bearing member 40, as described above, the pivot shaft 50 rotates and the first When the gear 33 is rotated and the bearing member 40 is rotated via the second gear 46, the inclination direction of the pivot shaft 50 is changed according to the swing of the wiper arm 12B and the wiper blade 13B (F1). ~ F4), the inclination directions of the wiper arm 12B and the wiper blade 13B are changed. The tilt angle of the wiper blade 13B can be set within a predetermined range by adjusting the tilt of the pivot shaft 50. Therefore, the error angle L of the wiper blade shown in FIG. The inclination angle of the wiper blade with respect to the normal line M of the wind glass surface can be set within a predetermined range.

When the wiper blade 13B reaches the front position J of the upper inverted position D (E3), the bearing member 4 is inserted.
The convex portion 42 of 0 abuts on the abutting portion 44a of the groove portion 44 (G
3), the rotational force of the bearing member 40 is transmitted to the annular member 43 (G3 to G4), and the annular member 43 rotates about the pivot shaft 50. Then, due to this rotation, the annular member 43
Because the tilt direction of the
3 to H4), the annular member 43 is at the upper reversal position D.
The arm head 11B that supports No. 3 is forcibly tilted in the swinging direction (downward reversing position C direction) (H
4). The operation of the arm head 11B will be described with reference to FIG. In the figure, N1 to N3 are perspective views showing the operation of the peripheral members of the arm head 11B, P1 to P3 are N-N3 arrow views in the R direction, and Q1 to Q3 are N-N3 SS cross-sectional views. is there. N1 is when the wiper blade 13B reaches the position J before the upper reversal position D, N3 is when the upper reversal position D is reached,
N2 indicates the state of each member at the intermediate position between the front position J and the upper inverted position D. The wiper blade 13B is in the upper inverted position D.
When swinging from the front position J to the upper inverted position D, the annular member 4
3 rotates about the pivot shaft 50 as indicated by P1 to P3, and forcibly changes the inclination direction of the arm head 11b with respect to the pivot shaft 50, so that the second connecting member 48 fixed to the pivot shaft 50 is rotated. Although the position with respect to the arm head 11B also changes, since the first connecting member 47 rotates about the axis T (Q1 to Q3), the connection state between the pivot shaft 50 and the arm head 11B is the first connecting member 48 and the first connecting member 48. It is maintained by the connecting member 47. Therefore, the connection between the pivot shaft 50 and the arm head 11B is maintained and the arm head 1 is maintained.
1B can be forcibly tilted in the swinging direction,
Wiper arm 12B held at one end of the head 11B
The wiper blade 13B held at one end of the wiper arm 12B is also inclined in the swinging direction.

The above description is centered on the operation of each member when the wiper blade 13B swings from the lower reversal position C to the upper reversal position D, but when it swings from the upper reversal position D to the lower reversal position C. Each member operates in the same manner, and at the lower reversal position C, the annular member 43 forcibly tilts the arm head 11B supporting the annular member 43 in the swinging direction (upward reversal position D direction). Therefore, the wiper arm 12B held at one end of the arm head 11B and the wiper blade 13B held at one end of the wiper arm 12B also incline in the swinging direction. As described above, the inclining means in this embodiment includes the annular member 43, the bearing member 40, the second gear 46, the first gear 33, the rotary shaft 30, the first lever 60, and the connecting rod 63.

Now, referring to FIG. 9, the wiper position between the lower reversal position C and the upper reversal position D of the wiper 10 in this embodiment.
The change characteristic of the error angle corresponding to the swing angle of the frame 12B is shown. In the figure, the curve U1 is the wiper arm 12
B is an error angle curve when swinging from the lower reversal position C to the upper reversal position D, and a curve U2 is an error angle curve when the wiper arm 12B swings from the upper reversal position D to the lower reversal position C. The curve W1 is shown in FIG.
The error angle curve W2 when the cam 105 swings from the lower reversal position C to the upper reversal position D, the curve W2 is a conventional wiper arm.
An error angle curve when the frame 105 swings from the upper inverted position D to the lower inverted position C is shown. Further, in the error angle in the figure, the inclination angle of the wiper blade in the upward reversal position direction is positive, and the inclination angle in the downward reversal position direction is negative. As is clear from this figure, the wiper blade 13B of this embodiment is inclined in the swinging direction in both the upper reversing position direction and the lower reversing position direction, and the fluctuation of the error angle is also compared with the conventional wiper. It is small and the error angle is set within a predetermined range (for example, within ± 6 degrees).

As described above, the right wiper 10B (wiper 1
0) is the wiper blade 11B and the wiper blade 12B, and the wiper blade 13B at the upper inverted position D and the lower inverted position C.
Is forcibly tilted in the swinging direction, the blade driver 14 can be surely tilted in the swinging direction. Therefore, it is possible to reduce the wiping residue when the blade driver 14 wipes the wind glass 15, and it is possible to improve the wiping performance of the wiper. Further, in the case of this embodiment, since the pivot shaft 50 is rotatably supported at a position inclined with respect to the rotation center 40a of the bearing member 40, the tilt of the pivot shaft 50 is adjusted to adjust the wiper blade error. -Because the angle can be set within a predetermined range, it is possible to further reduce the wiping residue when the blade driver 14 wipes the wind glass 15, and to improve the wiping performance of the wiper more reliably. You can

In the above embodiment, the right wiper 10B of the parallel interlocking type wiper 10 has been mainly described, but it goes without saying that the left wiper 10A can be applied in the same configuration. Further, the present invention relates to a parallel interlocking type wiper 1
Not limited to 0, it may be applied to a so-called one-arm wiper. In the above embodiment, the second lever having the link rod connected to the pivot shaft is fixed, and the second lever and the first lever of the rotary shaft are connected by the connecting rod. Is not limited to, for example, by fixing the second lever in which the link rod is connected to the rotating shaft,
The first lever may be fixed to the pivot shaft, and the second lever and the first lever may be connected by a connecting rod.
Further, as an example of the mechanism for transmitting the rotational force of the bearing member to the annular member, the example in which the convex portion of the bearing member and the groove portion of the annular member are engaged has been used, but the invention is not limited to this.
For example, the transmission portion including the convex portion and the groove portion may be formed as a separate member from the bearing member and the annular member, or the bearing member may be provided with the groove portion and the annular member may be provided with the convex portion, and the arrangement thereof Also, various modifications can be considered for the shape.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the vicinity of a pivot shaft of a vehicle wiper according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the vicinity of the pivot shaft of the vehicle wiper according to the first embodiment of the present invention.

FIG. 3 is a bottom view showing the vicinity of the pivot shaft of the vehicle wiper in the first embodiment.

FIG. 4 is a sectional view of an annular member according to the first embodiment. (Fig. 1
XX sectional view).

FIG. 5 is a schematic overall configuration diagram of a vehicle wiper in the first embodiment.

FIG. 6 is a sectional view of the wiper blade in the first embodiment (Y-Y sectional view in FIG. 5).

FIG. 7 is a diagram for explaining the operation of the vehicle wiper in the first embodiment (lower inverted position to upper inverted position).

FIG. 8 is an operation explanatory view of the arm head in the first embodiment.

FIG. 9 is a diagram showing a change characteristic of an error angle of the wiper in the first embodiment.

FIG. 10 is a sectional view showing a conventional vehicle wiper.

[Explanation of symbols]

 10 wiper 10A left wiper 10B right wiper 11A arm head 11B arm head 12A wiper arm 12B wiper arm 13A wiper blade 13B wiper blade 14 blade driver 16 coupling part 17 hole 30 rotating shaft (tilting means) 33 First gear (tilting means) 40 Bearing member (tilting means) 43 Annular member (tilting means) 46 Second gear (tilting means) 47 First connecting member (connecting means) 48 Second connecting member (connecting means) 50 Pivot shaft 60 first lever (tilting means) 61 second lever (rotating means) 62 link rod (rotating means) 63 connecting rod (tilting means)

Claims (1)

[Claims] 1. A wiper blade having a blade driver, a wiper arm for holding the wiper blade at one end, a coupling portion for holding the other end of the wiper arm at one end, and the other end. An arm head having a circular hole, a connecting means having one end rotatably connected to an intermediate portion between the connecting portion of the arm head and the hole, and fixed to the other end of the connecting means, A pivot shaft for swinging the arm head through a connecting means, a turning means for turning the pivot shaft, and a power of the turning means at an upper reversing position and a lower reversing position of the wiper arm. A wiper for a vehicle, comprising: an inclining means for forcibly inclining the arm head in a swinging direction.