JP2950120B2 - 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 wiper device,
In particular, the present invention relates to a wiper device that can smoothly follow a wiping surface that is a cubic curved surface that is complicated and has a small radius of curvature and that can reliably wipe the wiping surface.

[0002]

2. Description of the Related Art A conventional wiper device will be described below with reference to FIGS. This example describes a wiper device for a windshield of an automobile.

In FIG. 1, reference numeral 1 denotes a front windshield (hereinafter simply referred to as a glass surface) of an automobile as a wiping surface. This glass surface 1 forms a cubic curved surface.

In FIG. 1, reference numeral 2 denotes a blade rubber for wiping the glass surface 1. The blade rubber 2 is made of rubber, for example, and has a substantially inverted triangular wiping portion 20 at one end (lower end) for wiping the glass surface 1 and a substantially trapezoidal holding at the other end (upper end). It comprises a portion 21 and an intermediate neck portion 22 provided integrally between the lower surface of the holding portion 21 and the upper surface of the wiping portion 20.

In FIG. 1, reference numeral 3 denotes a vertical rubber 3 for holding the blade rubber 2. This vertical bra 3
Has a notch 30 whose inner shape is slightly larger than the outer shape of the holding portion 21 of the blade rubber 2 and whose lower surface is provided with a notch 30 having a width slightly larger than the width of the neck 22 of the blade rubber 2. The vertebra 3 is loosely fitted to the holding portion 21 of the blade rubber 2, and the notch 30 of the vertebra 3 is fitted into the neck 22 of the blade rubber 2.
Is loosely inserted. Thus, the blade rubber 2 is held by the vertical rubber 3. It is not always necessary to use this vertebra 3.

In FIG. 1, reference numeral 4 denotes a primary lever. The primary lever 4 is formed, for example, by bending a thin steel plate, and includes an upper plate portion and left and right side plate portions.
An opening 40 is provided substantially at the center of the upper plate portion of the primary lever 4 and the primary lever 4
The clip body 44 is set in the opening of the primary lever 4, and the clip body 44 is rotatably attached to the left and right side plate portions corresponding to the opening 40 of the primary lever 4 by rivets 43 substantially parallel to the glass surface 1. . Also, a plurality of, for example, seven, substantially rectangular through holes 47 are provided at both ends of the upper plate portion of the primary lever 4. It is not always necessary to provide this through hole 47.

In FIG. 1, reference numeral 5 denotes a secondary lever. The secondary lever 5 is formed, for example, by bending a thin steel plate, and includes an upper plate portion and left and right side plate portions.
An engaging claw 5 is attached to one end of the secondary lever 5 (the end that is outside when attached to the primary lever 4).
0 is provided. Substantially the center of the two secondary levers 5 is placed at both ends of the primary lever 4 on the glass surface 1.
Each of them is rotatably mounted by a rivet 51 substantially parallel to.

In FIG. 1, reference numeral 6 denotes a yoke. The yoke 6 is formed, for example, by bending a thin steel plate, and includes a top plate portion and left and right side plate portions. Engaging claws 60 are provided at both ends of the yoke 6, respectively. Almost the center of the two yokes 6 is connected to the other ends of the two secondary levers 5 (ends that become inside when attached to the primary lever 4) by rivets 61 substantially parallel to the glass surface 1. Attach it rotatably.

The engaging claw 50 of the secondary lever 5 and the engaging claw 60 of the yoke 6 are formed so that the lower ends of the left and right side plate portions of the secondary lever 5 and the left and right side plate portions of the yoke 6 are substantially inward at right angles. Bend it.
The gaps 52 and 62 between the engaging claws 50 and 60 on the left and right sides.
Is slightly larger than the width of the neck 22 of the blade rubber 2. The engaging claw 50 of the secondary lever 5 and the engaging claw 60 of the yoke 6 are loosely fitted to the vertebra 3,
And a gap 52 between the engaging claws 50 of the secondary lever 5.
The neck 22 of the blade rubber 2 is loosely inserted into the gap 62 between the engaging claws 60 of the yoke 6. In this manner, the engaging claws 50 at the outer end of the secondary lever 5 and the engaging claws 60 at both ends of the yoke 6 are engaged with the blade rubber 2 and the vertical rubber 3, respectively.
Thus, the two engaging claws 50 of the secondary lever 5
The wiper device that supports the blade rubber 2 with the four engagement claws 60 of the yoke 6, that is, the six engagement claws 50 and 60 in total, is referred to as a six-point support type.

The secondary lever 5 and the yoke 6
Are the primary lever 4 and the blade rubber 2
And a connecting member for connecting the vertebra 3. The connecting member in the illustrated example has one secondary rail.
One set of connecting members is constituted by the bar 5 and one yoke 6
Then, it is attached to both ends of the primary lever 4 respectively.
Attached. That is, the primary lever 4 and
Between the blade rubber 2 and the vertebra 3
Are connected by two sets of connecting members. The blade rubber 2, the vertebra 3, the primary lever 4, the secondary lever 5, and the yoke 6 constitute a wiper blade.

In FIG. 1, reference numeral 8 denotes a drive unit of the wiper device. The drive unit 8 is connected to a drive shaft of a wiper motor (not shown), and extends in a direction substantially perpendicular to the glass surface 1, and a wiper shaft 80.
Arm head 81 attached to the
1, a wiper arm 83 rotatably attached to the wiper shaft 80 by a hinge pin 82 substantially orthogonal to the wiper shaft 80, the wiper arm 83 and the arm head 8
1 and an elastic member (not shown) that constantly presses the wiper arm 83 toward the glass surface 1 side. The distal end of the wiper arm 83 on the driving side is connected to the clip body 44 of the primary lever 4 of the wiper blade.
Removably attached to.

Thus, by driving the wiper motor of the drive unit 8, the wiper blade moves in the directions of arrow A (open direction) and arrow B (close direction) in FIG. By performing intermittent reciprocating motion, the wiping unit 20 of the blade rubber 2 wipes the glass surface 1. In the above-described wiper device, when the wiper blade is stored (when the drive of the wiper device is stopped), the wiper blade is positioned with the direction of arrow B facing downward.

[0013]

However, in the above-mentioned conventional wiper device, the center of the secondary lever 5 is rotatably attached to both ends of the primary lever 4 by rivets 51 substantially parallel to the glass surface 1. Therefore, the connecting member composed of the secondary lever 5 and the yoke 6 is rotatable around the axis of the rivet 51, that is, in a direction substantially perpendicular to the glass surface 1; It cannot rotate in the horizontal direction (parallel direction). Therefore, in the above-mentioned conventional wiper device, the primary lever 4 and the connecting member (the secondary lever 5 and the yoke 6) are connected as shown in FIG.
It has a linear shape with respect to the horizontal direction of the glass surface 1 (or viewed from the direction perpendicular to the glass surface 1). As a result,
The blade rubber 2 supported by the connecting members (the secondary lever 5 and the yoke 6) also has a linear shape with respect to the horizontal direction of the glass surface 1. For this reason, the blade rubber 2 in the conventional wiper device is hard to fall with respect to the glass surface 1, and smoothly follows the glass surface 1 having a cubic curved surface, particularly, a glass surface 1 which is a complicated cubic curved surface having a small radius of curvature. Can not. As described above, the conventional wiper device has a problem that it is difficult to securely wipe the glass surface 1 having a cubic curved surface.

An object of the present invention is to provide a wiper device capable of smoothly following a wiping surface which is a cubic curved surface having a complicated and small radius of curvature and reliably wiping the wiping surface.

[0015]

SUMMARY OF THE INVENTION The present invention provides two sets of connecting parts.
Material is placed on both ends of the primary lever, almost against the wiping surface.
With the hinge mechanism consisting of a vertical shaft member, the hinge machine
It is characterized in that it is mounted so as to be rotatable around the axis of a shaft member .

[0016]

[0017]

[0018]

[0019]

[0020]

According to the present invention, when the wiper is driven by driving the drive unit of the wiper device, the two sets of connecting members are plied by the frictional force between the wiping surface and the blade rubber.
At both ends of the Mary lever, almost perpendicular to the wiping surface
Around the axis of the shaft member of the
The blade rubber is rotated in a flat direction, and accordingly, the blade rubber has a curved shape in which both ends precede and a center portion precedes the wiping movement direction. For this reason, the blade rubber in the present invention can easily fall down on the wiping surface, and can smoothly follow the wiping surface forming a cubic curved surface having a complicated and small curvature radius. As a result, the wiper device of the present invention can reliably wipe the wiping surface forming the cubic curved surface.

[0021]

[0022]

[0023]

[0024]

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Two embodiments of a wiper device according to the present invention will be described below with reference to FIGS. Note that hatching is omitted in the drawing. 1 to 7 show a first embodiment of a wiper device according to the present invention. This embodiment describes a wiper device for a windshield of an automobile. In the drawings, the same reference numerals as those in FIGS. 13 to 16 denote the same components. The connecting member in this embodiment is a single connecting member.
One set of the secondary lever 5 and the two yokes 6
A connecting member is configured.

In the figure, reference numeral 92 denotes a pop rivet. The pop rivet 92 is used to fix a plurality of components to each other or to be rotatable relative to each other about the axis of the pop rivet 92 by an insertion operation, a caulking operation, or the like on one side of the assembled component. . The pop rivet 92 in the present invention is a mounting mechanism,
This is a hinge mechanism for mounting a plurality of components so as to be rotatable about the axis 96 of the pop rivet 92 (shaft member).

In the figure, 9 is a holder. The holder 9 includes an upper surface plate portion and left and right side surface plate portions. Through holes 90 and 91 are provided in the upper plate portion and the left and right side plate portions of the holder 9 respectively.

On the other hand, through holes 45 are provided in the upper surface plate portions at both ends of the primary lever 4. Further, through holes 53 are provided in the left and right side plates at the center of the secondary lever 5.

In FIG. 1, reference numeral 7 denotes a cover made of an elastic member such as rubber or elastomer. The cover 7 has an outer fitting portion 70 having a substantially rectangular shape externally fitted to the holding portion 21 of the blade rubber 2 and having a cutout at the center of the lower surface portion, and the blade rubber extending from the outer fitting portion 70. 2, a narrow portion 71 interposed between the notch 30 of the vertebra 3 and the gap 52 between the secondary lever 5 and the gap 62 of the yoke 6, and from the narrow portion 71, the secondary lever 5 and The yoke 6
And a through-hole 73 formed in the upper surface of the cover 72.

Thus, the holder 9 is externally fitted to the central portion of the secondary lever 5 and the through holes 91 in the left and right side plate portions of the holder 9 are aligned with the through holes 53 in the left and right side plate portions of the secondary lever 5. A rivet 51 substantially parallel to the glass surface 1 is inserted into the through holes 53 and 91, and the rivet 51 is crimped, so that the holder 9 and the secondary lever 5 are rotatably attached to each other by the rivet 51. Next, the assembly of the holder 9, the secondary lever 5, the yoke 6, the vertebra 3 and the blade rubber 2 is inserted and set in the cover 7, and the primary lever 4 is set on the cover 7, and the primary lever 4 is set. The through-hole 45 of the cover 4, the through-hole 73 of the cover 7, and the through-hole 90 of the upper plate portion of the holder 9 are aligned.
Then, a pop rivet 92 is inserted into the through holes 45, 73 and 90 in the direction of the arrow in FIG. 2, that is, from the upper plate portion of the primary lever 4 to the upper plate portion of the holder 9, and the pop rivet is inserted. 92 is crimped by a crimping operation on the upper plate portion side of the primary lever 4.
Then, the center portion of the secondary lever 5 is connected to the both ends of the primary lever 4 via the cover 7 and the holder 9 by the pop rivet 92 as a hinge mechanism composed of a shaft member substantially perpendicular to the glass surface 1. Is mounted so as to be rotatable around the axis of a shaft member substantially perpendicular to the glass surface 1 of the pop rivet 92.

The rotation axis of the primary lever 4 and the secondary lever 5, that is, the distance C from the pop rivet 92 to the end of the blade rubber 2, is determined by the rotation axis of the primary lever 4 and the secondary lever 5,
That is, from the pop rivet 92 to the primary lever 4
Is smaller than the mounting position of the rivet 43 for mounting the lock body 44, that is, the mounting position between the rivet 43 and the lock unit 44.

On the other hand, in the wiper device of the present invention in this embodiment, the cover 7 is interposed between the primary lever 4, the secondary lever 5, and the yoke 6, and the secondary lever 5, the yoke 6, the vertebra 3, and the blade rubber 2 are provided. (The holding portion 21 and the neck portion 22) are covered with the cover 7, and the primary lever 4 is exposed.

The wiper device according to the present invention in this embodiment has the above-described configuration, and its operation will be described below. First, by driving the wiper motor of the drive unit 8, the wiper blade is moved by the arrow A in FIG.
Direction (open direction) and arrow B direction (close direction)
Then, a high-speed reciprocating motion, a low-speed reciprocating motion, and an intermittent reciprocating motion are performed to wipe the glass surface 1 with the wiping unit 20 of the blade rubber 2. Then, the frictional force between the glass surface 1 and the wiping portion 20 of the blade rubber 2, that is, the frictional force between the glass surface 1 and the central portion of the blade rubber 2 is large, and the frictional force between the glass surface 1 and both ends of the blade rubber 2 is large. Since the friction force is small,
The secondary levers 5 at both ends of the primary lever 4 rotate in the horizontal direction of the glass surface 1 around the axis of the pop rivet 92 substantially perpendicular to the glass surface 1. That is, as shown in FIGS. 6A and 7A, the end side of the secondary lever 5 is in the moving direction of the wiper blade (FIG. 6 is the opening direction, and FIG. 7 is the closing direction) in the same direction E as A and B. , F respectively. As a result, as shown in FIGS. 6 (B) and 7 (B), when viewed from the direction perpendicular to the glass surface 1, both ends of the blade rubber 2 precede the wiping movement directions A and B, and Is followed by a curved shape. To this end, the blade rubber 2 according to the present invention is, as shown in FIGS. 6 (C) and 7 (C),
Since the glass surface 1 can easily follow the glass surface 1 forming a cubic curved surface having a complicated and small radius of curvature, the glass surface 1 forming the cubic curved surface can be reliably wiped. be able to.

In particular, in the wiper device according to the present invention in this embodiment, the secondary lever 5 is attached to both ends of the primary lever 4 by the pop rivet 92 as a hinge mechanism comprising a shaft member substantially perpendicular to the glass surface 1. 1 are attached so as to be rotatable around an axis substantially perpendicular to the axis. Therefore, when the wiper is activated,
The frictional force between the glass surface 1 and the blade rubber 2 causes the secondary lever 5
However, in the horizontal direction of the glass surface 1, it is possible to smoothly rotate around the axis of the pop rivet 92 that is substantially perpendicular to the glass surface 1. As a result, the blade rubber 2 can be more smoothly curved with the smooth rotation of the secondary lever 5. The means for attaching the secondary lever 5 to the primary lever 4 may be other than the pop rivet 92 serving as the hinge mechanism.

The wiper device according to the present invention in this embodiment is configured such that the distance C from the pivot axis (pop rivet 92) between the primary lever 4 and the secondary lever 5 to the end of the blade rubber 2 is determined by the primary lever 4 and the secondary lever 4. 5 is smaller than the distance D from the axis of rotation (pop rivet 92) to the mounting position of the primary lever 4 and the drive unit 8 (the mounting rivet 43 of the lock body 44), so that the glass surface 1 and the blade rubber 2, the frictional force between the glass surface 1 and both ends of the blade rubber 2 is further reduced, and the secondary levers 5 at both ends thereof rotate more smoothly with respect to the primary lever 4. Thus, the blade rubber 2 bends more smoothly. It should be noted that the present invention is not limited to the above dimensional relationship. That is, the distance C and the distance D may be equalized by the pressing force of the blade rubber 2 against the glass surface 1 (the frictional force between the glass surface 1 and the blade rubber 2), or the distance C may be changed to the distance D. It may be larger.

Further, in the wiper device according to the present invention in this embodiment, since the connecting member (the secondary lever 5 and the yoke 6) and a part of the vertebra 3 and the blade rubber 2 are covered with the cover 7, the water is rotated by the wiper blade. It is possible to prevent intrusion into the moving shaft portion. Further, it is possible to cut off a sound emitted from the connecting member when the wiper is operated. Further, it is possible to prevent snow and ice from adhering to the connecting member, the blade rubber 2 and the like. Note that the cover 7 does not necessarily have to be used.

FIGS. 8 to 12 show a second embodiment of the wiper device according to the present invention. This embodiment describes a wiper device for a windshield of an automobile. In the drawings, the same reference numerals as those in FIGS. 1 to 7 and FIGS. 13 to 16 denote the same components.

In the drawing, reference numeral 46 denotes an engaging projection. The engagement projections 46 are upper plate portions at both ends of the primary lever 4 and are integrally protruded from the lower surface near the through hole 45. The engaging projection 46 has a cylindrical trapezoidal shape. In the figure, 93 is an engagement hole. The engaging hole 93 is provided on the upper surface plate portion of the holder 9 and is provided near the through hole 90 in an arc shape centered on the center of the through hole 90. The engaging projection 46 is engaged with the engaging hole 93 via the cover 7. The engaging projection 46 and the engaging hole 93 constitute a mechanism for regulating the rotation angle (for example, 2θ) of the connecting member (the secondary lever 5 and the yoke 6) with respect to the primary lever 4. In this embodiment, the engaging projection 46 is engaged with the engaging hole 93 via the cover 7. However, a through hole is formed in the cover 7 to engage the engaging projection 46. It may be directly engaged with the hole 93.

In the drawing, reference numeral 94 denotes a blade spoiler. The blade spoiler 94 includes a main body 97 having a blade shape, and a mounting portion 95 integrally projecting from the main body 97. The mounting portion 95 of the blade spoiler 94 is fitted and fixed in the through hole 47 of the primary lever 4, and the blade spoiler 94 is mounted on the primary lever 4. The blade spoiler 94 receives the wind pressure during traveling by the main body 97 and moves the wiper blade to the glass surface 1.
It acts to press against

The wiper device according to the present invention in this embodiment has the above-described configuration, so that the same operation and effect as those in the first embodiment can be achieved. In particular, the wiper device of the present invention in this embodiment can regulate the rotation angle of the connecting member (secondary lever 5 and yoke 6) with respect to primary lever 4. That is, as shown in FIG. 11 (A) or FIG. 12 (A), at the time of the wiper operation, the secondary lever 5 is moved by θ in the E direction or the F direction with respect to the primary lever 4 moving in the A direction or the B direction. Fig. 1
As shown in FIG. 1 (C) or FIG. 12 (C), the engaging protrusion 46 of the primary lever 4 comes into contact with one edge or the other edge of the engaging hole 93 of the holder 9 integrated with the secondary lever 5, and The rotation of the secondary lever 5 is restricted.
As a result, the degree of curvature of the blade rubber 2 can be adjusted under various conditions, for example, the vertical and horizontal curvatures of the cubic curved glass surface 1, the rotation axis (pop) of the secondary lever 5 at both ends of the primary lever 4. Adjustment can be made to suit conditions such as the distance (2D) between the rivets 92) and wind pressure. As a result, when the curved blade rubber 2 is inverted, that is, when the bending direction of the blade rubber 2 changes, there is no fear that the central portion of the blade rubber 2 jumps up and the wiping remains. Further, in the wiper device of the present invention in this embodiment, since the degree of curvature of the blade rubber 2 can be regulated, the blade spoiler 9 is attached to the wiper arm 83, the wiper blade, and the like.
Even in the case of the wiper device equipped with the above-mentioned blade spoiler 9,
4 can be prevented.

In the wiper device of the present invention in the above-described embodiment, the center of the yoke 6 is rotatable at both ends of the two secondary levers 5 by rivets 61 substantially parallel to the glass surface 1. This is a so-called eight-point support type wiper device in which the blade rubber 2 is supported by the attachment claws 60 at both ends of the four yokes 6, that is, a total of eight engagement claws 60. Like 6
A point support type wiper device may be used.

[0042]

As is apparent from the above description, the wiper device of the present invention can smoothly follow the wiping surface forming a cubic curved surface having a complicated and small radius of curvature and wipe the wiping surface reliably. it can.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a wiper device of the present invention,
It is a perspective view of a wiper blade.

FIG. 2 is an exploded perspective view of a primary lever, a cover, a holder, a secondary lever, a yoke, and a pop rivet.

FIG. 3 is an enlarged exploded perspective view of the main part.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 1;

FIG. 5 is a plan view of the wiper blade.

6A is a plan view of the wiper blade showing a state where the wiper blade is moving in the open direction, FIG. 6B is an explanatory view showing a state where the blade rubber is curved, and FIG. 6C is a view showing FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG.

7A is a plan view of the wiper blade showing a state where the wiper blade is moving in the closing direction, FIG. 7B is an explanatory view showing a state in which the blade rubber is curved, and FIG. FIG. 7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 shows a first embodiment of the wiper device of the present invention,
FIG. 3 is an exploded perspective view of a primary lever, a cover, a holder, a secondary lever, a yoke, and a pop rivet.

FIG. 9 is an enlarged exploded perspective view of the main part.

FIG. 10 is a plan view of a wiper blade.

11A is a plan view of the wiper blade showing a state where the wiper blade is moving in the open direction, FIG. 11B is an explanatory view showing a state where the blade rubber is curved, and FIG.
FIG. 10 is a view as viewed from the direction of the arrow IX in FIG.

12A is a plan view of the wiper blade showing a state where the wiper blade is moving in the closing direction, FIG. 12B is an explanatory view showing a state where the blade rubber is curved, and FIG.
FIG. 10 is a view along arrow IX in FIG. 9 in a state where the wiping movement is performed in the closing direction.

FIG. 13 is a side view of a conventional wiper device.

FIG. 14 is a perspective view of a conventional wiper device.

15 is a sectional view taken along line XV-XV in FIG.

FIG. 16 is a plan view of a conventional wiper device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Glass surface (wiping surface), 2 ... Blade rubber, 3 ... Vertebra, 4 ... Primary lever, 45 ... Engagement convex part, 5 ... Secondary lever, 6 ... Yoke, 7 ... Cover, 8 ... Wiper drive part, 9 ... Holder, 92 ... Pop rivet, 93 engagement hole, 94 ... Blade spoiler.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B60S 1/38

Claims (2)

(57) [Claims] 1. A primary lever attached to a drive unit of a wiper device, a blade rubber for wiping a wiping surface, and both a blade rubber and the primary lever.
And a second set of coupling member connected respectively between the end
In the wiper device, the two sets of connecting members are provided at both ends of the primary lever.
To, as its rubber blade in frictional force between the rubber blade and the wiping surface when the wiper operation forms a curved shape having both ends ahead and central with respect to the wiping direction of movement is followed, substantially against the wiping surface Hinge machine consisting of vertical shaft members
By the structure, it is possible to rotate around the axis of the shaft member of the hinge mechanism
A wiper device , each of which is attached to a wiper device. 2. The rotation between the primary lever and the connecting member.
The distance from the shaft to the end of the blade rubber is
Primary lever from the rotation axis of the lever and the connecting member
The wiper device according to claim 1, wherein the distance is smaller than a distance between the printer and the drive unit .