JP2020019370A - Cover member for wiper blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cover member for a wiper blade capable of facilitating an assembly work and improving the efficiency of a manufacturing process. SOLUTION: In a hood 10 provided in a wiper blade 1, protrusions 13 and 14 are provided on an inner peripheral surface of a recess 12 arranged between a head 21 of a blade rubber portion 2 and a vertibra 34 of a support portion 3. rice field. The protrusion 13 is provided on the ceiling 12A of the recess 12 facing the upper surface 21A of the head 21, and the protrusion 14 is provided on the side 12B of the recess 12 facing the side surfaces 21B on both sides of the head 21. The protrusions 13 and 14 extend over the entire length in the longitudinal direction of the recess 12 which is the assembly direction of the head 21 and the vertical bra 34, and have a curved shape facing the head 21 side. [Selection diagram] Fig. 2

Description

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

  Some wiper blades used in cold regions (snowfall regions) include a cover member (for example, a rubber hood) that covers a wiper blade main body (a support portion that supports a wiping member). In such a hooded wiper blade (so-called winter blade), the hood prevents snow or water from entering the inside of the wiper blade body, so that snow or frozen water can function as a wiper blade (for example, a support portion). Is prevented from being hindered.

JP 2014-4846 A JP 2012-224126 A

  FIG. 7 is a sectional view of such a conventional wiper blade. As shown in the figure, the wiper blade 101 has 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. Hood 110 is provided. The support portion 103 is provided with a vertical bar 103A, and the head rubber 102A of the blade rubber portion 102 is assembled to the vertical bar 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 portion 103 is in a state of being sandwiched between the vertebra 103A and the head 102A. For this reason, when assembling the head 102A to the vertebra 103A, the efficiency of the assembling work may be reduced due to frictional resistance generated between the hood 110 and the head 102A, both of which are made of rubber.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a cover member for a wiper blade that can facilitate an assembling operation and can increase the efficiency of a manufacturing process.

  The present invention is provided in a wiper blade provided with a wiping member for wiping a surface to be wiped and a support portion for supporting the wiping member, and a cover member for a wiper blade for covering the support portion, wherein the support portion is The wiper blade cover member includes a holding portion that accommodates and holds the held portion provided on the wiping member, and the wiper blade cover member includes a concave portion disposed between the held portion and the holding portion. At least one projection is provided for contacting the outer peripheral surface of the held portion.

  The held portion and the holding portion are assembled to each other from the longitudinal direction, the recessed portion extends over the entire length of the held portion and the holding portion in the longitudinal direction, and the protrusion is the recessed portion. May extend over the entire length in the longitudinal direction.

  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 is provided at least on the ceiling portion. It may be.

  A plurality of the protrusions may be provided at intervals on the ceiling.

  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 projecting portion includes the ceiling portion and the side. 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 a vertex facing the held portion side.

  According to the present invention, in a wiper blade cover member (for example, hood 10, 40, 50) provided on a wiper blade (for example, wiper blade 1), a held portion (for example, head) of a wiping member (for example, blade rubber portion 2) 21) and a concave portion (for example, the concave portion 12) arranged between the held portion (for example, the vertical bur 34) of the support portion (for example, the support portion 3), a protrusion (for example, the protrusion portion 13) which comes into contact with the outer peripheral surface of the held portion. , 13A, 13B, 14, 14A, and 14B), the entire outer peripheral surface of the held portion is in contact with the entire inner peripheral surface of the concave portion (the surface facing the held portion side). The contact area between the holding portion and the concave portion can be significantly reduced. Therefore, in the operation of assembling the wiping member to the supporting portion (that is, the operation of attaching the held portion to the holding portion), the frictional resistance generated between the held portion and the concave portion can be significantly reduced, thereby facilitating the assembling operation. Thus, the manufacturing process of the wiper blade can be made more efficient.

  If the held portion and the holding portion are assembled to each other from the longitudinal direction, the recess extends over the entire length of the held portion and the holding portion in the longitudinal direction, and the projection extends over the entire length of the recess in the longitudinal direction. At the time of assembling the holding portion, the entire portion of the held portion in the holding portion can be kept in contact with the protruding portion, and the concave portion can have appropriate rigidity in the longitudinal direction (assembly direction). Therefore, it is difficult for the concave portion to be twisted, and the assembling work can be stably performed. In addition, the held portion accommodated in the holding portion comes into contact with the protruding portion over the entire length in the longitudinal direction, so that the held portion is stably held.

  The recess includes a ceiling (eg, ceiling 12A) facing the upper surface (eg, upper surface 21A) of the held portion, and a side (eg, side 12B) facing the side surface (eg, side 21B) of the held portion, If the protrusions (for example, protrusions 13, 13A, 13B) are provided at least on the ceiling, the protrusions are provided between the upper surface of the held portion and the ceiling, which have a relatively large contact area. Thus, the reduction of the contact area and the frictional resistance between the held portion and the concave portion can be effectively achieved.

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

  If the projections are provided on both the ceiling portion and the side portions of the concave portion, the contact state between the concave portion and the held portion is stabilized, and a stable assembling operation can be performed.

If the projection has a curved shape (for example, a semicircular cross-sectional shape) facing the held portion side, the contact area between the projection and the held portion 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 compared to the case where the protrusion has a corner.

  If the protrusion has a triangular cross-sectional shape whose vertex is directed to the held portion side, the protrusion and the held portion contact at the vertex of the triangular cross section, so that the contact area between the protrusion and the held portion is very large. The frictional resistance during assembly can be extremely reduced.

It is a side view showing the whole composition of the wiper blade provided with the hood which is a cover member of a 1st embodiment of the present invention. It is AA sectional drawing of FIG. It is a sectional view showing the hood of a 1st embodiment of the present invention. It is a perspective view showing a part of food 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 having a hood 10 as a cover member according to a first embodiment of the present invention. In FIG. 1, only the hood 10 is shown in a cross section, and each configuration accommodated 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 which is a wiping member for wiping a surface to be wiped (for example, a glass surface of an automobile), a support portion 3 supporting the blade rubber portion 2, and a support portion 3. A hood 10 is a cover member that covers the outside, and an end cap 4 that is provided on both side ends of the support portion 3 and closes the ends of the hood 10 is provided.

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

  The head 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 sides 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 vertical bra. The primary lever 32 is disposed at the center in the longitudinal direction of the support portion 3, and a clip holder 35 is provided on an upper portion of the primary lever 32, and a wiper is provided via a coupling member (not shown) mounted on the clip holder 35. The blade 1 is connected to a wiper arm (not shown).

  The secondary lever 32 is rotatably connected to both ends of the primary lever 31. The yoke lever 33 is rotatably connected to one end of the secondary lever 32 (an 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 side ends of the yoke lever 33 are claw portions 32A and 33A for gripping the vertebra 34 and the blade rubber portion 2, respectively. I have.

  The vertical bra 34 is a long member having substantially the same length as the blade rubber portion 2 and is formed of, for example, metal. The force exerted on the blade rubber portion 2 from the support portion 3 by the vertebra 34 is evenly distributed over the entire length of the blade rubber portion 2 in the longitudinal direction.

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

  The head 21 of the blade rubber portion 2 is assembled into the housing portion 34A of the vertical bra 34 from the longitudinal direction of the wiper blade 1. By such assembling, the head 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 and is made of, for example, rubber, and is formed by, for example, compression molding or transfer molding. The support portion 3 is entirely covered with the hood 10 by being accommodated in the hollow portion 11 (inside of the cylindrical shape) of the hood 10.

  The lower end of the hood 10 is provided with a recess 12 formed by depressing a part of the outer surface of the hood 10 inward. The recess 12 extends over the entire length of the hood 10 in the longitudinal direction. When the head 21 of the blade rubber portion 2 is assembled in the housing portion 34A of the vertical rubber 34, the concave portion 12 is disposed in a state of being sandwiched between the head 21 and the vertical rubber 34, and The head 21 is housed in the recess 12.

  The concave portion 12 has a shape corresponding to the head portion 21 of the blade rubber portion 2, and has a ceiling portion 12 </ b> A arranged opposite to the upper surface 21 </ b> A of the head portion 21 and opposite side surfaces 21 </ b> B of the head portion 21. Side portions 12B arranged on both sides. The lower side of the recess 12 facing the ceiling 12A is an opening 21C, from which the leg 22 of the blade rubber portion 2 extends outside the recess 12. .

  Protrusions 13 and 14 are provided on the inner peripheral surface of the concave portion 12 (inwardly facing surfaces of the ceiling portion 12A and the side portion 12B). In the present embodiment, one projection 13 is provided near the center of the left and right sides of the ceiling 12A, and one projection 14 is provided on each of the side surfaces 12B on both sides.

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

  With such a configuration, when the head 21 of the blade rubber portion 2 is accommodated in the recess 12, the upper surface 21 </ b> A of the head 21 is on the top of the protrusion 13, and the side surface 21 </ b> B of the head 21 is on the protrusion 14. It comes into contact with the top portions, and does not directly contact the inner peripheral surfaces of the ceiling portion 12A and the side portions 12B of the concave portion 12. Therefore, in an assembling operation in which the head 21 of the blade rubber portion 2 is inserted along the longitudinal direction of the hood 10 into the inside of the concave portion 12 arranged in the vertebra 34, a contact portion between the head 21 and the concave portion 12 is formed. Since only the projections 13 and 14 can be used, 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 more 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, the portion of the head 21 that is inserted into the recess 12 is formed. The entire length in the longitudinal direction can be kept in contact with the protruding portions 13 and 14, and the concave portion 12 can have an appropriate rigidity in the longitudinal direction (assembly direction). Therefore, the hood 10 (recess 12) is unlikely to be twisted, and the assembling work can be stably performed. In addition, the head 21 assembled in the recess 12 is stably held because the entire length in the longitudinal direction is in contact with the projections 13 and 14.

  Further, since the projections 13 and 14 have a curved shape, the contact area with the upper surface 21A and the side surface 21B of the head 21 can be minimized, and the frictional resistance during assembly can be extremely reduced. In addition, the contact state with the head 21 is more stable than when the projections 13 and 14 have corners.

  FIG. 5 shows a hood 40 according to a 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 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 concave portion 12, and two projections 14A and 14B are also provided on both side surfaces 12B. I have. The protrusions 13A and 13B are arranged at a predetermined interval from each other on the ceiling 12A, and extend parallel to the longitudinal direction of the hood 40. Similarly, the protrusions 14A and 14B are arranged at a predetermined interval from each other on the side surface 12B, and extend in parallel with the longitudinal direction of the hood 40. With such a configuration, the head 21 comes into contact with the plurality of protrusions 13A and 13B and the protrusions 14A and 14B on each of the upper surface 21A and the side surface 21B. But more stable. As a result, the operation of assembling the hood 40 into the recess 12 can be performed smoothly.

  FIG. 6 shows a hood 50 according to a third embodiment of the present invention. The hood 50 of the present embodiment is different from the hood 40 of the second embodiment in that the projections 13A and 13B are provided only on the ceiling 12A of the recess 12 and the projections are provided on the side 12B. The only difference is that they are not provided. As described above, according to the present embodiment, the protrusions 13A and 13B are provided only on the ceiling 12A, which has a relatively large area and can generate a large frictional resistance with the upper surface 21A of the head 21, thereby further improving the structure. With a simple configuration, it is possible to effectively reduce frictional resistance during assembly.

  Note that each of the above embodiments shows an example of the protrusion provided in the concave portion 12, and the scope of application of the present invention is not limited to these embodiments. For example, the number of projections provided on the ceiling 12A and the side 12B of the recess 12 is not particularly limited, and three or more projections may be used. Further, a configuration in which a protrusion is provided only on the side portion 12B of the concave portion 12 is also conceivable. Further, it is also possible to adopt a configuration in which a projection is provided at a lower end portion of the side portion 12B of the concave portion 12 (a portion disposed above the holding piece 34A of the vertical bar 34).

  In each of the above embodiments, the protruding portion has a curved shape (a shape in which a cross section orthogonal to the longitudinal direction is substantially semicircular). However, the present invention is not limited to such a shape. Various forms can be adopted as a form for reducing the contact area between the part and the held part. For example, as the protruding portion, a protruding portion having a triangular cross-sectional shape (a shape in which a cross section orthogonal to the longitudinal direction becomes a triangle) whose vertex is directed toward the held portion (head 21) is employed. The part and the held part may be in contact with each other. Even in such a configuration, the contact area between the projection and the held portion is very small, and the frictional resistance during assembly can be extremely small.

REFERENCE SIGNS LIST 1 wiper blade 2 blade rubber portion 3 support portion 4 end cap 10 hood 11 hollow portion of hood 12 recess portion of hood recess portion 12A recess portion ceiling portion 12B recess portion side portion 12C recess portion opening portion 13 projection portions 13A, 13B projection portion 14 projection portion 14A, 14B Projecting portion 21 Blade rubber head 21A Head upper surface 21B Head side surface 22 Blade rubber leg 23 Blade rubber neck 31 Primary lever 32 Secondary lever 32A Secondary lever claw 33 Yoke lever 33A Claw portion 34 of yoke lever 34 Vertical bra 34A Storage portion 34B of vertical bra Holding piece 35 of vertical bra Clip holder

The present invention is provided for a wiper blade including a wiping member for wiping a surface to be wiped and a support portion for supporting the wiping member, and a cover member for a wiper blade for covering the support portion. The wiper blade cover member includes a holding portion that accommodates and holds the held portion provided on the wiping member, and the wiper blade cover member includes a concave portion disposed between the held portion and the holding portion. The apparatus further comprises at least one protrusion contacting an outer peripheral surface of the held part, wherein the held part and the holding part are assembled to each other from a longitudinal direction, and the cover member for the wiper blade includes the support member. A flexible tubular member that covers the entirety of the portion, wherein the recess is formed by bending a part of the wiper blade cover member inward, and the held portion and the holding portion are formed. It extends over the entire length,
The protrusion extends over the entire length of the recess in the longitudinal direction.

Claims (7)

A wiper blade provided with a wiping member for wiping the surface to be wiped and a support portion for supporting the wiping member, a wiper blade cover member for covering the support portion,
The support unit includes a holding unit that stores and holds the held unit provided on the wiping member,
The wiper blade cover member includes a concave portion disposed between the held portion and the holding portion,
A cover member for a wiper blade, wherein the concave portion has at least one protrusion contacting an outer peripheral surface of the held portion. The held portion and the holding portion are configured to be assembled to each other from the longitudinal direction,
The concave portion extends over the entire length of the held portion and the holding portion in the longitudinal direction,
The wiper blade cover member according to claim 1, wherein the protrusion extends over the entire length of the recess in the longitudinal direction. 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 projection is provided at least on the ceiling.   4. The wiper blade cover member according to claim 3, wherein a plurality of the protrusions are provided on the ceiling at intervals. 5. 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 on both the ceiling and the side.   The cover member for a wiper blade according to any one of claims 1 to 5, wherein the protrusion has a curved shape facing the held portion side.   The wiper blade cover member according to any one of claims 1 to 5, wherein the protrusion has a triangular cross-sectional shape whose apex faces the held portion side.

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