JP6684322B2 - Cover member for wiper blade - Google Patents

Description

  The present invention relates to a wiper blade cover member provided for a wiper blade used for waterproofing in a cold region or the like.

  Some wiper blades used in cold regions (snow areas) are provided with a cover member (for example, a rubber hood) that covers the wiper blade body (support portion that supports the wiping member). In such a wiper blade with a hood (so-called winter blade), the hood prevents snow and water from entering the inside of the wiper blade body, so that snow, frozen water, etc. function as a wiper blade (for example, a supporting portion). The rotation of the plurality of levers constituting the above) is prevented from being hindered.

JP, 2014-4846, A JP, 2012-224126, A

  FIG. 7 is a sectional view showing such a conventional wiper blade. As illustrated, the wiper blade 101 includes a blade rubber portion 102 that is a rubber wiping member, a support portion 103 that supports the blade rubber portion 102, and a rubber member that is a cover member that covers the outside of the support portion 103. The hood 110 of The support portion 103 is provided with a vertibra 103A, and the head portion 102A of the blade rubber portion 102 is assembled to the vertibra 103A of the support portion 103 so that the blade rubber portion 102 is supported by the support portion 103. ing.

  In such a configuration, a part of the hood 110 that covers the outside of the support 103 is sandwiched between the vertibra 103A and the head 102A. Therefore, when the head 102A is assembled to the vertibra 103A, the frictional resistance generated between the hood 110 and the head 102A, both of which are made of rubber, may reduce the efficiency of the assembly work.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a cover member for a wiper blade, which can facilitate the assembling work and make the manufacturing process efficient.

The present invention is provided in a wiper blade including a wiping member for wiping a surface to be wiped and a supporting portion for supporting the wiping member, and in a wiper blade cover member for covering the supporting portion, the supporting portion is the The wiper blade includes a holding portion for accommodating and holding the held portion provided in the wiping member, and the wiper blade cover member includes a concave portion arranged between the held portion and the holding portion, and the inside of the concave portion is provided. On the peripheral surface, at least one protrusion that protrudes from the inner peripheral surface and contacts the outer peripheral surface of the held portion is provided, and the held portion and the holding portion are assembled in the longitudinal direction. The cover member for the wiper blade is a flexible tubular member that covers the entire supporting portion, and the recess is formed by bending a part of the cover member for the wiper blade inward. Is, the extending over the entire longitudinal length of the holding portion and the held portion, the protrusion extends across the entire length of the recess.

  The concave portion includes a ceiling portion arranged to face an upper surface of the held portion and a side portion arranged to face a side surface of the held portion, and the protrusion portion is provided at least on the ceiling portion. It may be.

  A plurality of the protrusions may be provided on the ceiling with a gap.

  The concave portion includes a ceiling portion arranged to face an upper surface of the held portion and a side portion arranged to face a side surface of the held portion, and the protrusion portion includes the ceiling portion and the side portion. It may be provided in both parts.

  The protrusion may have a curved shape facing the held portion side.

  The protrusion may have a triangular cross-sectional shape with an apex facing the held portion side.

  According to the present invention, in the wiper blade cover member (for example, the hoods 10, 40, 50) included in the wiper blade (for example, the wiper blade 1), the held portion (for example, the head) of the wiping member (for example, the blade rubber portion 2) is provided. 21) and the held portion (for example, the vertibra 34) of the supporting portion (for example, the supporting portion 3) disposed in the concave portion (for example, the concave portion 12) that is in contact with the outer peripheral surface of the held portion. , 13A, 13B, 14, 14A, 14B) are provided, compared to the case where the entire outer peripheral surface of the held portion contacts the entire inner peripheral surface of the recess (the surface facing the held portion). The contact area between the holding portion and the recess can be significantly reduced. Therefore, in the assembling work of the wiping member to the supporting portion (that is, the attaching work of the held portion to the holding portion), the frictional resistance generated between the held portion and the concave portion can be significantly reduced, which facilitates the assembling work. Therefore, the manufacturing process of the wiper blade can be made efficient.

  If the held portion and the holding portion are assembled from each other in the longitudinal direction, the recess extends over the entire length of the held portion and the holding portion in the longitudinal direction, and the protrusion extends over the entire length of the recess in the longitudinal direction, During the work of assembling the holding portion, the entire portion of the held portion that is assembled in the holding portion can be kept in contact with the protrusions, and the recesses can have appropriate rigidity in the longitudinal direction (assembly direction). Therefore, the concave portion is less likely to be twisted, and the assembling work can be stably performed. Further, since the held portion housed in the holding portion is in contact with the protrusion over the entire length in the longitudinal direction, it is stably held.

  The concave portion is provided with a ceiling portion (for example, a ceiling portion 12A) facing the upper surface (for example, the upper surface 21A) of the held portion and a side portion (for example, a side portion 12B) facing the side surface (for example, the side surface 21B) of the held portion, If the projections (for example, the projections 13, 13A, 13B) are provided at least on the ceiling, the projections are provided between the upper surface of the held portion and the ceiling where the contact area is relatively large. Therefore, the contact area between the held portion and the recess and the frictional resistance can be effectively reduced.

  If a plurality of protrusions (for example, protrusions 13A and 13B) arranged at intervals are provided on the ceiling of the recess, even if the protrusion is provided only on the ceiling, the recess and the held portion are not separated. Since the contact state is stable, assembly work can be performed smoothly.

  If the projections are provided on both the ceiling and the side of the recess, the contact between the recess and the held portion is stable, and stable assembly work can be performed.

If the protrusion has a curved shape (for example, a semi-circular cross-section) that faces the held part, the contact area between the protrusion and the held part can be minimized, and the frictional resistance during assembly is extremely small. it can. Further, the contact state with the held portion is more stable than in the case where the protrusion has a corner.

  If the protrusion has a triangular cross-sectional shape with the apex facing the held portion side, the protrusion and the held portion make contact at the apex of the triangular cross section, so the contact area between the protruding portion and the held portion is extremely small. The friction resistance during assembly can be made extremely small.

It is a side view showing the whole wiper blade composition provided with the hood which is a cover member of a 1st embodiment of the present invention. It is an AA sectional view of FIG. It is sectional drawing which shows the hood of 1st Embodiment of this invention. It is a perspective view showing a part of hood of a 1st embodiment of the present invention. It is sectional drawing which shows the hood of 2nd Embodiment of this invention. It is sectional drawing which shows the hood of 3rd Embodiment of this invention. It is sectional drawing which shows the conventional wiper blade.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
1 and 2 show the overall configuration of a wiper blade 1 including a hood 10 that is a cover member according to the first embodiment of the present invention. Note that, in FIG. 1, only the hood 10 is shown in cross section, and each configuration housed in the hood 10 is shown in a side view.

  As shown in the figure, the wiper blade 1 includes a blade rubber portion 2 that is a wiping member that wipes a surface to be wiped (for example, a glass surface of an automobile), a support portion 3 that supports the blade rubber portion 2, and a support portion 3. The hood 10 is a cover member that covers the outside, and the end caps 4 that are provided at both end portions of the support portion 3 and close the end portions of the hood 10.

  The blade rubber portion 2 is a long member that extends over the entire length of the wiper blade 1, and is made of rubber, for example. The blade rubber portion 2 includes a head portion 21 on the upper side (support portion 3 side), a leg portion 22 on the lower side (wiping surface side), and a neck portion 23 having a narrow width between the head portion 21 and the leg portion 22. It has and. When the wiper blade 1 is used, the lower end of the leg portion 22 is arranged in contact with the surface to be wiped, and the wiper surface is wiped by being moved along the surface to be wiped.

  The head portion 21 of the blade rubber portion 2 is a portion having a rectangular cross-sectional shape, and has a flat upper surface 21A and side surfaces 21B on both sides extending vertically downward from both side edges of the upper end surface 21A.

  The support portion 3 includes a primary lever 31, a secondary lever 32, a yoke lever 33, and a vertibra 34. The primary lever 32 is arranged at the center of the support portion 3 in the longitudinal direction, a clip holder 35 is provided on the upper portion thereof, and a wiper is provided via a coupling member (not shown) attached to the clip holder 35. The blade 1 is connected to a wiper arm (not shown).

  The secondary lever 32 is rotatably connected to both end portions of the primary lever 31. Further, the yoke lever 33 is rotatably connected to one end of the secondary lever 32 (the outer end in the longitudinal direction of the wiper blade 1). The other end of the secondary lever 32 (the inner end in the longitudinal direction of the wiper blade 1) and both end portions of the yoke lever 33 become claw portions 32A and 33A for gripping the vertibra 34 and the blade rubber portion 2, respectively. There is.

  The vertibra 34 is a long member having substantially the same length as the blade rubber portion 2, and is made of, for example, metal. The vertibra 34 is configured to evenly distribute the force exerted from the support portion 3 to the blade rubber portion 2 over the entire length of the blade rubber portion 2 in the longitudinal direction.

  The birdie bra 34 includes an accommodating portion 34A having a substantially U-shaped cross section in which the head portion 21 of the blade rubber portion 2 is just accommodated. At the lower end of the housing portion 34A, holding pieces 34B on both sides that extend inward are provided.

  The head portion 21 of the blade rubber portion 2 is adapted to be assembled in the accommodating portion 34A of the vertibra 34 from the longitudinal direction of the wiper blade 1. With such an assembly, the head portion 21 housed in the housing portion 34A is held from below by the holding piece 34B and held in the housing portion 34A.

  As shown in FIGS. 3 and 4, the hood 10 is a flexible tubular member made of, for example, rubber, and is formed by, for example, compression molding or transfer molding. The supporting portion 3 is housed in the hollow portion 11 (inside the tubular shape) of the hood 10 so that the entire supporting portion 3 is covered by the hood 10.

  At the lower end of the hood 10, there is provided a recess 12 formed by denting a part of the outer surface of the hood 10 toward the inside. The recess 12 extends over the entire length of the hood 10 in the longitudinal direction. When the head portion 21 of the blade rubber portion 2 is assembled in the accommodating portion 34A of the vertibra 34, the concave portion 12 is arranged in a state of being sandwiched between the head portion 21 and the vertibra 34, and The head 21 is stored in the recess 12.

  The concave portion 12 has a shape corresponding to the head portion 21 of the blade rubber portion 2, and faces the ceiling portion 12A arranged to face the upper surface 21A of the head portion 21 and the both side surfaces 21B of the head portion 21. It is provided with both side portions 12B arranged on both sides. The lower side of the recess 12 facing the ceiling 12A is an opening 21C, and the leg 22 of the blade rubber part 2 extends outside the recess 12 from the opening 21C. .

  Protrusions 13 and 14 are provided on the inner peripheral surface of the recess 12 (the inward surfaces of the ceiling portion 12A and the side portion 12B). In the present embodiment, one protrusion 13 is provided near the center of the ceiling 12A in the left-right direction, and one protrusion 14 is provided on each of the side faces 12B on both sides.

  Each of the protrusions 13 and 14 extends over the entire length of the hood 10 in the longitudinal direction. Moreover, the protrusions 13 and 14 are formed to have a curved shape (a shape in which a cross section orthogonal to the longitudinal direction is a substantially semicircular shape) facing the head 21 side.

  With such a configuration, when the head 21 of the blade rubber portion 2 is housed in the recess 12, the upper surface 21A of the head 21 is on the top of the projection 13, and the side surface 21B of the head 21 is on the side of the projection 14. The top portions are in contact with each other, and the ceiling portions 12A and the side portions 12B of the recess 12 are not in direct contact with the inner peripheral surfaces. Therefore, in the assembling work in which the head portion 21 of the blade rubber portion 2 is inserted along the longitudinal direction of the hood 10 inside the recess portion 12 arranged in the vertibra 34, the contact portion between the head portion 21 and the recess portion 12 is Since only the protrusions 13 and 14 can be formed, the contact area can be reduced, and as a result, the frictional resistance generated between the head 21 and the recess 12 can be reduced. Therefore, the assembling work of the wiper blade 1 can be performed smoothly, and the manufacturing process can be made efficient.

  Further, since the protrusions 13 and 14 extend over the entire length of the hood 10 in the longitudinal direction, when the head 21 is inserted into the recess 12, when the head 21 is inserted into the recess 12 of the head 21, The entire length in the longitudinal direction can be kept in contact with the protrusions 13 and 14, and the recess 12 can also have an appropriate rigidity in the longitudinal direction (assembly direction). Therefore, the hood 10 (recess 12) is less likely to be twisted, and the assembling work can be stably performed. Further, the head 21 assembled in the recess 12 is in a state in which the entire length in the longitudinal direction is in contact with the protrusions 13 and 14, so that the head 21 is stably held.

  Further, since the protrusions 13 and 14 have a curved shape, the contact area with the upper surface 21A and the side surface 21B of the head portion 21 can be minimized, and the frictional resistance during assembly can be made extremely small. In addition, the contact state with the head 21 is more stable than in the case where the protrusions 13 and 14 have corners.

  FIG. 5 shows a hood 40 according to the second embodiment of the present invention. The hood 40 of the present embodiment is different from the hood 10 of the first embodiment only in the number of protrusions provided on the inner peripheral surface of the recess 12. Therefore, in the following description, the same components as those of the hood 10 will be denoted by the same reference numerals, and the description thereof will be omitted.

  In the hood 40 of the present embodiment, two projections 13A and 13B are provided on the ceiling 12A of the recess 12, and two projections 14A and 14B are provided on both side surfaces 12B. There is. The protrusions 13A and 13B are arranged on the ceiling 12A at a predetermined distance from each other and extend parallel to the longitudinal direction of the hood 40. Similarly, the protrusions 14A and 14B are arranged on the side surface 12B at a predetermined distance from each other and extend parallel to the longitudinal direction of the hood 40. With such a configuration, the head 21 comes into contact with the plurality of protrusions 13A, 13B and the protrusions 14A, 14B on each of the upper surface 21A and the side surface 21B, so that the contact state between the head 21 and the protrusions. But more stable. As a result, the work of assembling the hood 40 into the recess 12 can be smoothly performed.

  FIG. 6 shows a hood 50 according to the third embodiment of the present invention. Compared to the hood 40 of the second embodiment, the hood 50 of the present embodiment is provided with the protrusions 13A and 13B only on the ceiling 12A of the recess 12, and the side 12B has the protrusion. The only difference is that it is not provided. As described above, according to the present embodiment, by providing the protrusions 13A and 13B only on the ceiling portion 12A having a relatively large area and capable of generating a large frictional resistance with the upper surface 21A of the head portion 21, With a simple structure, it is possible to effectively reduce the frictional resistance during assembly.

  It should be noted that each of the above-described embodiments shows an example of the protrusion provided in the recess 12, and the scope of application of the present invention is not limited to these embodiments. For example, the number of protrusions provided on the ceiling 12A and the side 12B of the recess 12 is not particularly limited, and three or more protrusions may be used. Further, a configuration in which the protrusion is provided only on the side portion 12B of the recess 12 is also conceivable. Further, it is also possible to adopt a configuration in which a protrusion is provided at the lower end portion of the side portion 12B of the recess 12 (the portion arranged above the holding piece 34A of the vertibra 34).

  In each of the above-described embodiments, the projection has a curved shape (a shape in which a cross section orthogonal to the longitudinal direction is a substantially semicircular shape), but the present invention is not limited to such a shape, and the projection is not limited to this. Various forms can be adopted as a form for reducing the contact area between the portion and the held portion. For example, as the protrusion, a protrusion having a triangular cross-sectional shape (a shape in which a cross section orthogonal to the longitudinal direction is a triangle) having an apex facing the held portion (head 21) is adopted, and the protrusion is formed at the apex of the triangular cross section. The portion and the held portion may be in contact with each other. With such a configuration as well, the contact area between the protrusion and the held portion is very small, and the frictional resistance during assembly can be made extremely small.

DESCRIPTION OF SYMBOLS 1 Wiper blade 2 Blade rubber part 3 Support part 4 End cap 10 Hood 11 Hollow part of hood 12 Hood recess 12A recess ceiling 12B recess side 12C recess opening 13 protrusion 13A, 13B protrusion 14 protrusion 14A, 14B Projection 21 Head portion 21A of blade rubber portion Top surface 21B of head portion Side surface 22 of head portion 22 Leg portion of blade rubber portion Neck portion of blade rubber portion 31 Primary lever 32 Secondary lever 32A Secondary lever claw portion 33 Yoke lever 33A Yoke lever claw portion 34 Vertibra 34A Vertibra housing 34B Vertibra holding piece 35 Clip holder

Claims (6)

A wiper blade provided with a wiping member for wiping the surface to be wiped and a supporting portion for supporting the wiping member, and a wiper blade cover member for covering the supporting portion,
The support portion includes a holding portion that accommodates and holds a held portion provided in the wiping member,
The wiper blade cover member includes a concave portion arranged between the held portion and the holding portion,
On the inner peripheral surface of the concave portion , at least one protruding portion that protrudes from the inner peripheral surface and contacts the outer peripheral surface of the held portion,
The held portion and the holding portion are adapted to be assembled from each other in the longitudinal direction,
The wiper blade cover member is a flexible tubular member that covers the entire support portion,
The recessed portion is formed by bending a part of the wiper blade cover member inward, and extends over the entire length in the longitudinal direction of the held portion and the holding portion,
The said protrusion part is the cover member for wiper blades extended over the longitudinal total length of the said recessed part. The concave portion includes a ceiling portion arranged to face an upper surface of the held portion, and a side portion arranged to face a side surface of the held portion,
The wiper blade cover member according to claim 1, wherein the protrusion is provided at least on the ceiling.   The cover member for a wiper blade according to claim 2, wherein a plurality of the protrusions are provided on the ceiling with a space therebetween. The concave portion includes a ceiling portion arranged to face an upper surface of the held portion, and a side portion arranged to face a side surface of the held portion,
The cover member for a wiper blade according to claim 1, wherein the protruding portion is provided on both the ceiling portion and the side portion.   The wiper blade cover member according to any one of claims 1 to 4, wherein the protruding portion has a curved shape facing the held portion side.   The cover member for a wiper blade according to any one of claims 1 to 4, wherein the protrusion has a triangular cross-sectional shape whose apex faces toward the held portion side.

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