JP6084137B2 - Vehicle wiper - Google Patents

Description

  The present invention relates to a vehicle wiper.

  Patent Document 1 below describes a connection structure between a wiper arm and a wiper blade in a vehicle wiper. Briefly, a support shaft having a substantially D-shaped cross section having a small diameter portion is formed integrally with the wiper blade. On the other hand, a connecting hole having a substantially C-shaped cross section is formed in the wiper arm. Then, the support shaft of the wiper blade is inserted from the opening portion of the connection hole of the wiper arm, and the wiper arm is rotated relative to the wiper blade so that the small diameter portion of the support shaft does not correspond to the opening portion of the connection hole. Placed in position. As a result, the wiper blade is rotatably connected to the tip of the wiper arm.

Japanese Patent No. 3445530

  However, in the above-described vehicle wiper, since the wiper blade is rotated from the use position to the second angular position with respect to the wiper arm, the boundary between the small diameter portion and the shaft diameter portion of the support shaft is disposed at the opening of the connection hole. Then, there is a possibility that the wiper blade will rattle against the wiper arm.

  An object of the present invention is to provide a vehicle wiper that can suppress the rattling of the wiper blade with respect to the wiper arm in consideration of the above facts.

  The vehicle wiper according to the present invention is provided on one of the wiper arm and the wiper blade, the wiper arm that is reciprocally rotated, the wiper blade that is connected to the distal end side of the wiper arm and wipes the wiping surface, and the wiper arm and the wiper blade. A support shaft with the width direction of the wiper blade as an axial direction, and a pair of support holes that are provided on the other of the wiper arm and the wiper blade and rotatably support one axial end portion and the other axial end portion of the support shaft. And a pair of openings that are opened in a direction orthogonal to the axial direction of the support shaft on the inner peripheral surface of the support hole and whose width dimension is set smaller than the diameter dimension of the support shaft. The formed connecting portion and a part of the outer peripheral surface of the axial one end portion and the other axial end portion of the support shaft, and the diameter size is the diameter size of the support shaft and the width size of the opening. Remote is set smaller, and a, a pair of small diameter portions arranged in point symmetry with respect to the axis of the support shaft as viewed in the axial direction of the support shaft.

  According to the vehicle wiper configured as described above, the support shaft is provided on one of the wiper arm and the wiper blade, and the support shaft is disposed with the width direction of the wiper arm and the wiper blade as the axial direction. On the other hand, a connecting portion is provided on the other of the wiper arm and the wiper blade, and the connecting portion includes a pair of support holes. And the axial direction one end part and axial direction other end part of a spindle are each arrange | positioned in a pair of support hole, and the spindle is rotatably supported by the support hole. As a result, the wiper blade is rotatably connected to the wiper arm.

  Moreover, the connection part has a pair of opening part, and the width dimension of the opening part is set smaller than the diameter dimension of a spindle. Further, a small diameter portion is formed on each of the outer peripheral surfaces of the one axial end portion and the other axial end portion of the support shaft, and the diameter size of the small diameter portion is the diameter size of the support shaft and the width of the opening. It is set smaller than the dimensions. As a result, when assembling the support shaft into the support hole, the support shaft is supported by inserting the support shaft from the opening into the support hole by placing the small diameter portion in a position corresponding to the opening. Can be placed in the hole. And after arrange | positioning a spindle in a support hole, a small diameter part is arrange | positioned in a position corresponding to an opening part by rotating a spindle relatively with respect to a support hole. Thereby, the supporting shaft is prevented from coming off from the opening, and the supporting shaft is assembled in the support hole.

  Here, the pair of small-diameter portions are arranged point-symmetrically with respect to the axis of the support shaft when viewed from the axial direction of the support shaft. For this reason, even when one small diameter part is arrange | positioned in the use position at the opening part side, the other small diameter part can be arrange | positioned on the opposite side to an opening part. In this case, since the other opening is closed by the portion other than the small-diameter portion of the support shaft, movement of the support shaft toward the opening portion side is suppressed. As a result, play of the wiper blade with respect to the wiper arm can be suppressed.

  In the vehicle wiper of the present invention, the connecting portion has an introduction hole that communicates with the support hole through the opening.

  According to the vehicle wiper configured as described above, the connecting portion has the introduction hole, and the introduction hole communicates with the support hole through the opening. Thereby, the support shaft can be guided to the support hole side by the introduction hole by inserting the support shaft into the introduction hole. Moreover, since the direction of the small diameter part corresponding to an opening part can be match | combined with an introduction hole, the assembly | attachment property at the time of assembling a spindle in a support hole can be improved.

  Further, in the vehicle wiper according to the present invention, the outer peripheral surface of the one end in the axial direction and the other end in the axial direction of the support shaft has a planar shape connecting the arc portion formed in an arc shape and both ends of the arc portion. And a pair of small diameter portions arranged parallel to each other across the axis of the support shaft as viewed from the axial direction of the support shaft.

  According to the vehicle wiper having the above-described configuration, the outer peripheral surface of the one end portion in the axial direction and the other end portion in the axial direction of the support shaft includes the arc portion and the small diameter portion. The arc portion is formed in an arc surface shape, and the small diameter portion is formed in a planar shape connecting both ends of the arc portion. That is, the one axial end and the other axial end of the support shaft are formed in a substantially D-shaped cross section. And a pair of small diameter part is mutually arrange | positioned in parallel with the axis line of a spindle in between. Thereby, the axial direction one end part and axial direction other end part of a spindle are comprised by simple shape, and a spindle can be inserted in a support hole from an opening part. Further, when the support shaft is inserted into the support hole from the opening, the positions of the small diameter portion and the opening at the one axial end portion and the other axial end portion of the support shaft can be easily aligned.

  In the vehicle wiper of the present invention, the support shaft includes a first support shaft that constitutes one axial end portion of the support shaft, and a second support shaft that constitutes the other axial end portion of the support shaft, The other of the wiper arm and the wiper blade is provided with a connecting wall disposed between the first support shaft and the second support shaft, and a pair of the support holes, It is formed in the said connection wall, and is formed in the concave shape open | released to the axial direction one end side and axial direction other end side of the said spindle, respectively.

  According to the vehicle wiper having the above-described configuration, the support shaft is configured by two shafts, one axial end portion of the support shaft is the first support shaft, and the other axial end portion of the support shaft is the second support shaft. It is said that. Further, a connection wall is provided between the first support shaft and the second support shaft, and a pair of support holes are formed in the connection wall. And the support hole is formed in the concave shape open | released to the axial direction one end side and axial direction other end side of the spindle, respectively. That is, the pair of support holes are formed in a bottomed concave shape. For this reason, since the edge part of the internal peripheral surface of a support hole is connected by the bottom face (bottom wall) of a support hole, a deformation | transformation of a support hole can be prevented. Thereby, even if a part of inner peripheral surface of a support hole is opened by the opening part, it can prevent that the width dimension of an opening part becomes large.

  In the vehicle wiper of the present invention, the pair of openings are opened in a direction inclined with respect to the longitudinal direction of the wiper arm in a side view, and the opening corresponding to one axial end of the support shaft is One end of the opening is projected to the axis side of the support shaft when viewed from the opening direction of the opening, and the one end of the support shaft in the longitudinal direction of the wiper arm is defined by the inner peripheral surface of the support hole. The small-diameter portion at one end in the axial direction of the support shaft is disposed on the side opposite to the opening.

  According to the vehicle wiper configured as described above, the pair of openings are opened in a direction inclined with respect to the longitudinal direction of the wiper arm in a side view. Then, one end of the opening corresponding to one end of the support shaft in the axial direction protrudes toward the axis of the support shaft when viewed from the opening direction of the opening, and one end of the support shaft in the axial direction extends to the opening. Is sandwiched in the longitudinal direction of the wiper arm by one end of the support and the inner peripheral surface of the support hole. Thereby, the play of the wiper blade in the longitudinal direction of the wiper arm can be effectively suppressed.

It is the partially broken side view seen from the width direction one side which expands and shows the principal part of the connection mechanism applied to the wiper for vehicles concerning a 1st embodiment. It is a perspective view showing the whole wiper for vehicles concerning a 1st embodiment. FIG. 3 is a partially cutaway side view of the vehicle wiper coupling mechanism shown in FIG. 2 as viewed from one side in the width direction. FIG. 4 is a cross-sectional view of the vehicle wiper coupling mechanism shown in FIG. 3 as viewed from the front end side of the wiper arm. FIG. 5 is a partially cutaway side view of the vehicle wiper coupling mechanism shown in FIG. 4 as viewed from the other side in the width direction. FIG. 4 is a side view corresponding to FIG. 3 for explaining a procedure for connecting the wiper blade shown in FIG. 3 to a wiper arm. It is a side view corresponding to FIG. 3 which shows the connection mechanism of the wiper for vehicles which concerns on 2nd Embodiment. It is sectional drawing corresponding to FIG. 4 which shows the connection mechanism of the wiper for vehicles shown by FIG.

(First embodiment)

  Hereinafter, the vehicle wiper 10 according to the first embodiment will be described with reference to FIGS. As shown in FIG. 2, the vehicle wiper 10 includes a substantially long wiper arm 12 and a wiper blade 20 that wipes a rear glass RG (see FIG. 4) of a vehicle (automobile). . Hereinafter, each configuration will be described, and then the connecting mechanism 40 that connects the wiper arm 12 and the wiper blade 20 will be described.

  The wiper arm 12 includes an arm head 14 (FIG. 2 is covered with a head cover) that constitutes the base end of the wiper arm 12 (the end on the arrow A direction side in FIG. 2). The arm head 14 is fastened and fixed to the distal end portion of a substantially cylindrical pivot shaft 16. The pivot shaft 16 is an output shaft of a rear wiper motor (not shown) fixed to the vehicle, and is reciprocally rotated by a rotational driving force of a motor portion of the rear wiper motor via a speed reduction mechanism and a link mechanism accommodated in the speed reduction portion. Is done. As described above, the pivot shaft 16 is reciprocally rotated by the driving force of the rear wiper motor, so that the wiper arm 12 is reciprocally rotated in the directions of arrows G and H in FIG.

  Further, the wiper arm 12 includes a retainer 18. The retainer 18 is formed in a substantially long shape, extends from the arm head 14 to the distal end side (the arrow B direction side in FIG. 2) of the wiper arm 12, and is viewed from the longitudinal direction of the vehicle in the rear glass RG side. It is substantially U-shaped open to the direction of arrow F in FIG. The base end portion of the retainer 18 is rotatably supported by the arm head 14 with the width direction of the retainer 18 (arrow C direction and arrow D direction in FIG. 2) as an axial direction. The retainer 18 is supported from the arm head 14. The wiper arm 12 extends to the tip side. Further, an urging member (not shown) such as a tension coil spring is spanned between the retainer 18 and the arm head 14, and the retainer 18 is urged toward the rear glass RG by the urging member.

  The wiper blade 20 is formed in a substantially long shape, and the central portion in the longitudinal direction of the wiper blade 20 is connected to the distal end portion of the wiper arm 12 by a connecting mechanism 40 described later. As shown in FIG. 4, the wiper blade 20 has a blade rubber 22 for wiping the wiping surface S of the rear glass RG, a backing 30 for dispersing the pressing force from the wiper arm 12, and a holding for holding the blade rubber 22 and the backing 30. And a case 32.

  The blade rubber 22 is formed in a substantially long shape. Further, the upper portion (the portion on the side opposite to the rear glass RG (the direction of the arrow E in FIG. 4)) of the blade rubber 22 is a base portion 24, and the base portion 24 has an outer side in the width direction of the blade rubber 22 (FIG. 4). A pair of grooves 24A opened in the direction of arrow C and arrow D) is formed. Thereby, the base 24 is formed in a substantially H-shaped cross section that is open to the outside in the width direction of the blade rubber 22.

  Further, the blade rubber 22 includes a wiping portion 26, and the wiping portion 26 is provided on the lower side (the arrow F direction side in FIG. 4) with respect to the base 24. The wiping portion 26 is formed in a substantially triangular cross section, and is set so that the width dimension of the wiping portion 26 becomes smaller toward the rear glass RG side. And the width direction center part in the upper part of the wiping part 26 is couple | bonded with the width direction center part of the base 24 by the connection part 28 of substantially rectangular plate shape. Further, a lip 26A for wiping the wiping surface S of the rear glass RG is formed at the front end portion (lower end portion) of the wiping portion 26, and the lip 26A has a constant width dimension from the central portion in the width direction of the wiping portion 26. It protrudes to the rear glass RG side.

  The backing 30 is made of a metal spring plate and is formed in a substantially long plate shape. The backing 30 is disposed on the upper surface of the base portion 24 with the plate thickness direction being the vertical direction (the direction perpendicular to the wiping surface S). In its natural state, the backing 30 is slightly curved so that the central portion in the longitudinal direction is convex upward (the side opposite to the rear glass RG). The blade rubber 22 follows the wiping surface S of the rear glass RG by the spring force of the backing 30, and the pressing force from the wiper arm 12 is dispersed in the longitudinal direction of the blade rubber 22.

  The holding case 32 is made of resin and is formed in an elongated shape, and is formed so as to be able to be bent by the spring force of the backing 30. Further, the longitudinal cross-sectional shape of the holding case 32 is substantially uniform, and the holding case 32 has a flat and substantially C-shape opened to the rear glass RG side in a cross-sectional view seen from the longitudinal direction. In addition, the holding case 32 is disposed so that the opened end portions abut each other, and holds the base 24 and the backing 30 of the blade rubber 22. Specifically, the upper portion of the base portion 24 and the backing 30 are disposed in the holding case 32 in a cross-sectional view, and the open end portion of the holding case 32 is engaged in the groove portion 24 </ b> A of the base portion 24. Accordingly, the upper portion of the backing 30 and the base portion 24 is held by the holding case 32 in a state covered with the holding case 32.

  Next, the connection mechanism 40 which is a main part of the present invention will be described. As shown in FIG. 2, the coupling mechanism 40 is a mechanism for coupling the distal end portion of the wiper arm 12 and the longitudinal center portion of the wiper blade 20. As shown in FIGS. 3 to 5, the connecting mechanism 40 includes a blade side connecting portion 42 provided on the wiper blade 20 and an arm side connecting portion 70 provided on the tip of the retainer 18 of the wiper arm 12. It is configured to include.

(About the blade side connecting portion 42)

  The blade side connection portion 42 includes a connection main body portion 44 and a connection wall 46. As shown in FIG. 2, the connection main body 44 is disposed adjacent to the distal end side of the wiper arm 12 (retainer 18) in the assembled state of the wiper arm 12 and the wiper blade 20. The surface is arranged so as to be flush with the outer peripheral surface of the retainer 18. The outer shape of the connection main body 44 is set so as to converge on the upper surface of the holding case 32 as it goes away from the retainer 18.

  As shown in FIGS. 3 and 4, the connecting wall 46 is integrally provided on the retainer 18 side of the connecting main body 44. The connecting wall 46 protrudes upward from the holding case 32 (in the direction of arrow E in FIG. 4) with the plate thickness direction being the width direction of the wiper blade 20, and is disposed at the center in the width direction of the holding case 32. Has been.

  On one side surface (side surface on one side in the width direction of the wiper blade 20 (arrow C direction side in FIG. 4)) 46A of the connection wall 46, a first connection portion 50 as a “connection portion” is formed. The connecting portion 50 includes a first support hole 52 as a “support hole” and a first groove portion 54 as an “introduction hole”. The first support hole 52 has a concave shape opened to one side in the width direction of the wiper blade 20 and has a circular cross section. In the first support hole 52, a first support shaft 76, which will be described later, is arranged.

  As shown in FIG. 1, the first groove portion 54 is disposed on the base end side (the arrow A direction side in FIG. 1) of the wiper arm 12 with respect to the first support hole 52, and one side in the width direction of the wiper blade 20. It is formed in a groove shape opened to the side, and one end of the first groove portion 54 communicates with the first support hole 52. Further, the first groove portion 54 extends from the first support hole 52 in a direction orthogonal to the axis CL1 of the first support hole 52, and as viewed from the side, moves upward (as viewed from the base end side of the wiper arm 12). It is inclined in the direction of arrow E in FIG. And the upper end of the 1st groove part 54 is open | released upwards. As a result, a first opening 56 is formed on the inner peripheral surface 52A of the first support hole 52, and the first opening 56 opens to the proximal end side and the upper side of the wiper arm 12 in a side view. .

  The bottom surface of the first support hole 52 and the bottom surface of the first groove portion 54 are flush with each other, and the first connecting portion 50 has a bottomed concave shape opened to one side in the width direction of the wiper blade 20. Is formed. That is, one side surface 54A of the first groove portion 54, the inner peripheral surface 52A of the first support hole 52, and the other side surface 54B of the first groove portion 54 are the bottom surfaces (connections) of the first connection portion 50 at the respective edge portions. Connected by a wall 46). As a result, the deformation of the first connecting portion 50 such that the width dimension W of the first opening 56 (that is, the width dimension of the first groove portion 54) becomes large (the first opening 56 opens) is suppressed. It has come to be.

  Further, the width dimension W in the first opening 56 is set smaller than the diameter dimension of the first support hole 52. Then, the side surface 54A of the first groove portion 54 (disposed on the distal end side of the wiper arm 12 with respect to a reference line CL2 passing through the axis CL1 of the first support hole 52 and extending in the extending direction of the first groove portion 54 in a side view). The side surface is in contact with the inner peripheral surface 52A of the first support hole 52 (the side surface 54A of the first groove portion 54 extends from the inner peripheral surface 52A in the tangential direction of the first support hole 52). On the other hand, the side surface 54B of the first groove portion 54 (the side surface disposed on the proximal end side of the wiper arm 12 with respect to the reference line CL2) intersects the inner peripheral surface 52A of the first support hole 52. Thereby, in the 1st opening part 56, it arrange | positions so that 56 A of one ends of the 1st opening part 56 may protrude to the axis line CL1 side of the 1st support hole 52 seeing from the opening direction of the 1st opening part 56, and the said one end 56A. And the inner peripheral surface 52 </ b> A of the first support hole 52, a first support shaft 76 to be described later is sandwiched in the longitudinal direction of the wiper arm 12. In other words, the inner peripheral surface 52 </ b> A adjacent to the one end 56 </ b> A is disposed so as to wrap around the base end side of the wiper arm 12 with respect to a first support shaft 76 described later.

  On the other hand, as shown in FIG. 5, a second connection portion 60 as a “connection portion” is formed on the other side surface (side surface on the other side in the width direction of the wiper blade 20) 46 </ b> B of the connection wall 46. The two connecting portions 60 include a second support hole 62 as a “support hole” and a second groove portion 64 as an “introduction hole”. The second support hole 62 has a concave shape opened to the other side in the width direction of the wiper blade 20, is formed in a circular cross section, and is disposed coaxially with the first support hole 52 described above. In the second support hole 62, a second support shaft 78 described later is arranged.

  And the 2nd groove part 64 is comprised symmetrically with the 1st groove part 54 mentioned above with respect to the reference line CL2 by side view. That is, the second groove portion 64 is disposed on the base end side (the arrow A direction side in FIG. 5) of the wiper arm 12 with respect to the second support hole 62 and is open to the other width direction side of the wiper blade 20. The second support hole 62 communicates with the second support hole 62. The second groove portion 64 extends from the second support hole 62 in a direction orthogonal to the axis CL1 of the second support hole 62, and is upward (as viewed from the side) toward the proximal end side of the wiper arm 12. It is inclined in the direction of arrow E in FIG. And the upper end of the 2nd groove part 64 is open | released upwards. Thereby, the 2nd opening part 66 is formed in the internal peripheral surface of the 2nd support hole 62, and the 2nd opening part 66 is opened to the base end side and the upper side of the wiper arm 12 by side view.

  In addition, one side surface 64A of the second groove portion 64 (the side surface disposed on the distal end side of the wiper arm 12 with respect to the reference line CL2) intersects the inner peripheral surface 62A of the second support hole 62, and the second groove portion 64. The other side surface 64B (the side surface disposed on the base end side of the wiper arm 12 with respect to the reference line CL2) is in contact with the inner peripheral surface 62A of the second support hole 62 (in the tangential direction of the second support hole 62). A side surface 64B of the second groove portion 64 extends from the inner peripheral surface 62A). Thereby, in the second opening 66, one end 66A of the second opening 66 is disposed so as to protrude toward the axis CL1 of the second support hole 62 when viewed from the opening direction of the second opening 66, and The second support hole 62 (described later) is sandwiched between the one end 66A and the inner peripheral surface 62A of the second support hole 62 in a substantially vertical direction.

(About the arm side connecting portion 70)

  As shown in FIG. 4, the arm-side connecting portion 70 includes a pair of retainer side walls 72 and a support shaft 74. The retainer side wall 72 is disposed on the outer side in the width direction of the retainer 18 with respect to the connecting wall 46 so as to sandwich the connecting wall 46 described above.

  The support shaft 74 is disposed so that the axial direction is the width direction of the retainer 18. The support shaft 74 includes two shafts that are divided at the central portion in the axial direction and arranged coaxially. One end of the support shaft 74 in the axial direction (one side in the width direction of the retainer 18) is a first support shaft 76, and the other end in the axial direction of the support shaft 74 (the other side in the width direction of the retainer 18) is the first support shaft 76. Two support shafts 78 are provided.

  The first support shaft 76 is integrally formed with a retainer side wall 72 disposed on one side in the width direction of the retainer 18 with respect to the connecting wall 46. The first support shaft 76 protrudes from the retainer side wall 72 toward the connecting wall 46 and is disposed in the first support hole 52 coaxially with the first support hole 52. Thus, the wiper blade 20 is connected to the retainer 18 by the first support shaft 76 so as to be rotatable relative to the retainer 18.

  As shown in FIG. 1, the outer peripheral surface of the first support shaft 76 is formed in a substantially D-shaped cross section. That is, the outer peripheral surface of the first support shaft 76 includes a first arc portion 76A formed in a circular arc shape and a first small diameter portion 76B as a so-called D-cut planar “small diameter portion”. It is configured. The diameter dimension d1 at the first small diameter portion 76B of the first support shaft 76 is made smaller than the diameter dimension D1 at the first arc portion 76A of the first support shaft 76. Further, the width dimension W of the first opening 56 described above is set to be larger than the diameter dimension d1 of the first small-diameter portion 76B of the first support shaft 76, and the first arc portion 76A of the first support shaft 76 has a width. It is set smaller than the diameter dimension D1 at the site.

  Furthermore, in the state of the use position shown in FIGS. 1 and 3, the first small diameter portion 76 </ b> B is set to be disposed on the opposite side to the first opening 56. Specifically, the first arc portion 76A of the first support shaft 76 is disposed so as to close the first opening portion 56, and the first small diameter portion 76B is disposed on the side opposite to the first opening portion 56. The first support hole 52 is disposed to face the inner peripheral surface 52A.

  As shown in FIG. 4, the second support shaft 78 is formed integrally with a retainer side wall 72 disposed on the other side in the width direction of the retainer 18 with respect to the connecting wall 46. The second support shaft 78 protrudes from the retainer side wall 72 toward the connecting wall 46, and is disposed coaxially with the second support hole 62 in the second support hole 62. Accordingly, the wiper blade 20 is connected to the retainer 18 by the second support shaft 78 so as to be rotatable relative to the retainer 18.

  Further, as shown in FIG. 5, the outer peripheral surface of the second support shaft 78 is formed in a substantially D-shaped cross section, and the outer peripheral surface of the second support shaft 78 is viewed from the axial direction with respect to the axis CL1. The first support shaft 76 is point-symmetric. That is, the outer peripheral surface of the second support shaft 78 includes a second arc portion 78A formed in an arc surface shape and a second small diameter portion 78B as a so-called D-cut planar “small diameter portion”. It is configured. The first arc portion 76A and the second arc portion 78A are arranged concentrically as viewed from the axial direction of the support shaft 74, and the first small diameter portion 76B and the second small diameter portion 78B sandwich the axis CL1. Are arranged in parallel. Further, the diameter dimension of the second arcuate portion 78A of the second support shaft 78 is set to be the same as the diameter dimension D1 of the first arcuate portion 76A of the first support shaft 76. Further, the diameter dimension of the second small-diameter portion 78B of the second support shaft 78 is set to be the same as the diameter dimension d1 of the first small-diameter portion 76B of the first support shaft 76.

  Further, in the use position state shown in FIG. 5, the second small diameter portion 78B is arranged on the second opening 66 side. Specifically, in the second support shaft 78, a boundary portion between the second small diameter portion 78B and the second arc portion 78A is disposed in the second opening 66, and the second arc portion 78A and the second support hole are arranged. The inner peripheral surface 62 </ b> A of 62 is disposed to face the inner peripheral surface 62 </ b> A.

  Next, the operation and effect of the first embodiment will be described while explaining the procedure for connecting the wiper blade 20 to the retainer 18 (wiper arm 12).

  When connecting the wiper blade 20 to the retainer 18 (wiper arm 12), the first support shaft 76 (second support shaft 78) of the retainer 18 is connected to the upper end of the first groove portion 54 (second groove portion 64) of the wiper blade 20. Arrange on the upper side. At this time, the first small diameter portion 76B (second small diameter portion 78B) of the first support shaft 76 (second support shaft 78) is set to the side surface 54B (side surface 64A) of the first groove portion 54 (second groove portion 64). Place them in parallel.

  The diameter dimension d1 of the first small-diameter portion 76B (second small-diameter portion 78B) of the first support shaft 76 (second support shaft 78) is larger than the width dimension W of the first groove portion 54 (second groove portion 64). Since it is set to be small, the first support shaft 76 (second support shaft 78) is inserted into the first groove portion 54 (second groove portion 64) from the above state. Further, the first support shaft 76 (second support shaft 78) is moved toward the first support hole 52 (second support hole 62) along the first groove portion 54 (second groove portion 64). At this time, the movement of the first support shaft 76 (second support shaft 78) is guided by the side surfaces 54A and 54B (side surfaces 64A and 64B) of the first groove portion 54 (second groove portion 64).

  As shown in FIG. 6, when the first support shaft 76 (second support shaft 78) is disposed in the first support hole 52 (second support hole 62), the retainer 18 is removed from the wiper blade. 20 is rotated relative to the use position side. Accordingly, the first small diameter portion 76B (second small diameter portion 78B) is rotated (arranged) to a position that does not correspond to the first opening portion 56 (second opening portion 66). And the diameter dimension D1 in the site | part of the 1st circular arc part 76A (2nd circular arc part 78A) of the 1st spindle 76 (2nd spindle 78) is the width dimension of the 1st opening part 56 (2nd opening part 66). Since it is set larger than W, the first support shaft 76 (second support shaft 78) is prevented from coming off from the first opening 56 (second opening 66).

  Here, the first small-diameter portion 76B of the first support shaft 76 and the second small-diameter portion 78B of the second support shaft 78 are disposed at point-symmetrical positions with respect to the axis line CL1. In a state where the retainer 18 and the wiper blade 20 are disposed at the use position, the first small diameter portion 76B of the first support shaft 76 is disposed on the side opposite to the first opening 56, and the second support shaft 78 Two small diameter portions 78B are disposed on the second opening 66 side. Specifically, in the first support shaft 76, the first arc portion 76A is disposed so as to close the first opening 56, and in the second support shaft 78, the second small diameter portion 78B and the second arc portion 78A are arranged. The boundary portion is disposed in the second opening 66. As a result, at the support shaft 74, at least the back support of the first support shaft 76 toward the first opening 56 (the base end side of the wiper arm 12) is suppressed.

  Thus, since the first small-diameter portion 76B of the first support shaft 76 and the second small-diameter portion 78B of the second support shaft 78 are arranged in a point-symmetrical position with respect to the axis CL1, the second small-diameter portion Even when 78B is disposed on the second opening 66 side, the first small diameter portion 76B can be disposed on the side opposite to the first opening 56. In this case, since the first arc portion 76A closes the first opening 56, the support shaft 74 has at least the first opening 56 side of the first support shaft 76 (the base end side of the retainer 18). ) Is suppressed. Thereby, the play of the wiper blade 20 with respect to the wiper arm 12 (retainer 18) can be suppressed.

  In the first opening 56, one end 56A of the first opening 56 is disposed so as to protrude toward the axis CL1 side of the first support hole 52 as viewed from the opening direction of the first opening 56 (in other words, the first opening 56 The side surface 54B of the first groove portion 54 is formed outward from the tangential direction at the one end 56A of the one opening 56), and the one end 56A of the first opening 56 and the inner peripheral surface 52A of the first support hole 52 are formed. Thus, the first support shaft 76 is sandwiched in the longitudinal direction of the wiper arm 12. Thereby, since the 1st spindle 76 is inserted | pinched by 52 A of internal peripheral surfaces of the 1st support hole 52 in the longitudinal direction of the wiper arm 12, the play of the wiper blade 20 in the longitudinal direction of the wiper arm 12 can be suppressed effectively.

    Further, a first groove portion 54 (second groove portion 64) is formed in the first connection portion 50 (second connection portion 60), and the first groove portion 54 (second groove portion 64) is formed in the first opening 56. The first support hole 52 (second support hole 62) communicates with the second opening 66. As a result, the first support shaft 76 (second support shaft 78) is inserted into the first groove portion 54 (second groove portion 64), and the first support shaft 76 (second groove portion 64) is inserted into the first support shaft 76 (second groove portion 64). The second support shaft 78) can be guided toward the first support hole 52 (second support hole 62). In addition, the orientation of the first small diameter portion 76B (second small diameter portion 78B) corresponding to the first opening portion 56 (second opening portion 66) can be adjusted by the first groove portion 54 (second groove portion 64). As described above, it is possible to improve the assembling property when the first support shaft 76 (second support shaft 78) is assembled to the first support hole 52 (second support hole 62).

  In addition, the outer peripheral surface of the first support shaft 76 (second support shaft 78) has a first arc portion 76A (second arc portion 78A) formed in an arc surface shape and a first arc portion 76A (second arc portion). 78A) including a first small diameter portion 76B (second small diameter portion 78B) that forms a planar shape connecting both ends in the circumferential direction. That is, the outer peripheral surface of the first support shaft 76 (second support shaft 78) is formed in a substantially D-shaped cross section. The first small-diameter portion 76B and the second small-diameter portion 78B are arranged in parallel to each other with the axis line CL1 interposed therebetween in a side view. Accordingly, the first support shaft 76 (second support shaft 78) is configured in a simple shape, and the first support shaft 76 and the second support shaft 78 are moved from the first opening 56 and the second opening 66 to the first. It can be inserted into the support hole 52 and the second support hole 62. Further, when the first support shaft 76 and the second support shaft 78 are assembled into the first support hole 52 and the second support hole 62, the first opening 56 of the first support shaft 76 and the second support shaft 78. And alignment with respect to the 2nd opening part 66 can be made easy. Therefore, it is possible to improve the assembling property when the first support shaft 76 and the second support shaft 78 are assembled in the first support hole 52 and the second support hole 62.

  Further, a first support hole 52 and a second support hole 62 are respectively formed in the connecting wall 46, and the first support hole 52 and the second support hole 62 are open to the outside in the width direction of the wiper blade 20. It is formed in a concave shape. For this reason, the inner peripheral surface 52A of the first support hole 52 and the inner peripheral surface 62A of the second support hole 62 are the bottom surfaces (connection walls 46) of the first support hole 52 and the second support hole 62 at the respective edge portions. Connected by Thereby, the deformation | transformation of the 1st support hole 52 and the 2nd support hole 62 that the width dimension W of the 1st opening part 56 and the 2nd opening part 66 becomes large can be suppressed.

(Second Embodiment)

  A vehicle wiper 100 according to the second embodiment will be described with reference to FIGS. 7 and 8. The vehicle wiper 100 according to the second embodiment is configured in the same manner as the vehicle wiper 10 according to the first embodiment except for a connecting mechanism 102 described below. That is, in the connection mechanism 102 of the second embodiment, the first connection part 50 and the second connection part 60 are provided in the arm side connection part 70, and the support shaft 74 is provided in the blade side connection part 42. Yes. This will be specifically described below.

  The arm side connecting portion 70 includes a connecting wall 46, a first connecting portion 50, and a second connecting portion 60. The connecting wall 46 is formed integrally with the distal end portion of the retainer 18, and is formed at the center in the width direction of the retainer 18 with the plate thickness direction being the width direction of the retainer 18.

  The first connecting portion 50 is formed on one side surface 46 </ b> A of the connecting wall 46 and includes a first support hole 52 and a first groove portion 54. The first groove portion 54 is disposed on the distal end side of the retainer 18 with respect to the first support hole 52 and is inclined downward toward the distal end side of the wiper arm 12 in a side view. The side surface 54 </ b> A of the first groove portion 54 intersects the inner peripheral surface 52 </ b> A of the first support hole 52, and the side surface 54 </ b> B of the first groove portion 54 is in contact with the inner peripheral surface 52 </ b> A of the first support hole 52.

  Thereby, one end 56 </ b> A of the first opening 56 is disposed so as to protrude toward the axis CL <b> 1 side of the first support hole 52 when viewed from the opening direction of the first opening 56, and one end 56 </ b> A of the first opening 56. And the inner peripheral surface 52 </ b> A of the first support hole 52, the first support shaft 76 is sandwiched in the longitudinal direction of the wiper arm 12.

  And although illustration is abbreviate | omitted, the 2nd connection part 60 is formed in the other side 46B of the connection wall 46, and is comprised including the 2nd support hole 62 and the 2nd groove part 64. As shown in FIG. And the 2nd connection part 60 is comprised so that it may become line symmetrical with respect to the reference line CL2 by side view similarly to 1st Embodiment.

  On the other hand, the blade side coupling portion 42 includes a pair of blade side walls 104 and a support shaft 74. The blade side wall 104 is arranged on the outer side in the width direction of the wiper blade 20 so as to sandwich the connecting wall 46. The first support shaft 76 and the second support shaft 78 of the support shaft 74 are respectively formed on the blade side wall 104 and are coaxially disposed in the first support hole 52 and the second support hole 62. Thereby, the wiper blade 20 is rotatably connected to the wiper arm 12.

  Further, the first small-diameter portion 76B of the first support shaft 76 is disposed to face the inner peripheral surface 52A of the first support hole 52, and the first opening portion is formed by the first arc portion 76A of the first support shaft 76. 56 is blocked. On the other hand, although not shown, the second small-diameter portion 78B of the second support shaft 78 is disposed on the second opening 66 side of the second support hole 62, and the second arc portion 78A of the second support shaft 78. And the inner peripheral surface 62A of the second support hole 62 are arranged to face each other. Accordingly, also in the second embodiment, since the back of the wiper blade 20 with respect to the wiper arm 12 is suppressed by the first support shaft 76, the same operations and effects as in the first embodiment are exhibited.

  In the first embodiment and the second embodiment, the support shaft 74 is configured by the first support shaft 76 and the second support shaft 78, and is configured by two shafts. Instead of this, the support shaft 74 may be composed of one axis. That is, the first small diameter portion 76B is formed at one axial end portion of the support shaft 74, and the second small diameter portion 78B is formed at the other axial end portion of the support shaft 74, so that the first small diameter portion 76B and the second small diameter portion are formed. The portion 78B may be configured to be point symmetric with respect to the axis line CL1. In this case, the first connecting portion 50 and the second connecting portion 60 in the connecting wall 46 are configured to penetrate in the plate thickness direction of the connecting wall 46. Even when the support shaft 74 is configured by two shafts, the first connecting portion 50 and the second connecting portion 60 in the connecting wall 46 may be penetrated in the thickness direction of the connecting wall 46.

  Further, in the first embodiment and the second embodiment, the first small diameter portion 76B and the second small diameter portion 78B are formed in a planar shape, but the first small diameter portion 76B and the second small diameter portion 78B are replaced with each other. It may be slightly curved.

  Furthermore, in the first embodiment and the second embodiment, the first groove portion 54 and the second groove portion 64 are inclined with respect to the longitudinal direction of the wiper arm 12, but the first groove portion with respect to the longitudinal direction of the wiper arm 12 is used. The inclination angles of 54 and the second groove 64 can be arbitrarily set.

  In the first embodiment and the second embodiment, the first connecting part 50 (second connecting part 60) has the first groove part 54 (first groove part 64). In the connecting part 50 (second connecting part 60), the first groove part 54 (first groove part 64) may be omitted.

  Furthermore, in the first embodiment and the second embodiment, the vehicle wipers 10 and 100 are applied as vehicle wipers for wiping the rear glass RG of the vehicle, but the vehicle wipers 10 and 100 are used as the vehicle wipers. You may apply as a vehicle wiper which wipes a windshield.

DESCRIPTION OF SYMBOLS 10 ... Wiper for vehicles, 12 ... Wiper arm, 20 ... Wiper blade, 46 ... Connection wall, 50 ... 1st connection part (connection part), 52 ... 1st support hole ( Support hole), 54 ... 1st groove (introduction hole), 56 ... 1st opening (opening), 56A ... 1 end, 60 ... 2nd connection part (connection part), 62. ..Second support hole (support hole), 64 ... second groove (introduction hole), 66 ... second opening (opening), 74 ... support shaft, 76B ... first small diameter Part (small diameter part), 78B ... second small diameter part (small diameter part), 100 ... wiper for vehicle, d1 ... diameter dimension, D1 ... diameter dimension, S ... wiping surface, W · ..Width dimensions

Claims (5)

A wiper arm reciprocally rotated;
A wiper blade connected to the tip side of the wiper arm and wiping the wiping surface;
A support shaft provided on one of the wiper arm and the wiper blade, and having a width direction of the wiper arm and the wiper blade as an axial direction;
A pair of support holes provided on the other side of the wiper arm and the wiper blade, and rotatably supporting one axial end portion and the other axial end portion of the support shaft; and an inner peripheral surface of the support hole of the support shaft. A pair of openings that are opened in a direction orthogonal to the axial direction and whose width dimension is set smaller than the diameter dimension of the support shaft;
Formed on a part of the outer peripheral surface of one end in the axial direction and the other end in the axial direction of the support shaft, the diameter dimension is set smaller than the diameter dimension of the support shaft and the width dimension of the opening, A pair of small diameter portions arranged point-symmetrically with respect to the axis of the support shaft as viewed from the axial direction;
Wiper for vehicles equipped with.   2. The vehicle wiper according to claim 1, wherein the connecting portion includes an introduction hole that communicates with the support hole through the opening. An outer peripheral surface of one end portion in the axial direction and the other end portion in the axial direction of the support shaft includes an arc portion formed in an arcuate shape and the planar small diameter portion connecting both ends of the arc portion. ,
3. The vehicle wiper according to claim 1, wherein the pair of small diameter portions are arranged in parallel with each other with the axis of the support shaft interposed therebetween when viewed from the axial direction of the support shaft. The support shaft is composed of two shafts including a first support shaft that constitutes one axial end portion of the support shaft and a second support shaft that constitutes the other axial end portion of the support shaft,
The other of the wiper arm and the wiper blade is provided with a connecting wall disposed between the first support shaft and the second support shaft,
A pair of said support holes are formed in the said connection wall, and are formed in the concave shape each open | released to the axial direction one end side and the axial direction other end side of the said spindle. The vehicle wiper according to claim 1. The pair of openings are opened in a direction inclined with respect to the longitudinal direction of the wiper arm in a side view,
In the opening corresponding to the one axial end portion of the support shaft, one end of the opening portion protrudes toward the axial line side of the support shaft when viewed from the opening direction of the opening portion, and the inner periphery of the support hole. Is disposed at a position sandwiching one axial end of the support shaft in the longitudinal direction of the wiper arm by a surface,
The vehicle wiper according to any one of claims 1 to 4, wherein a small-diameter portion at one end portion in the axial direction of the support shaft is disposed on a side opposite to the opening.

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