JP2008254625A - Wiper blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper device adopting a pivot structure for a mounting means provided between a mounting means wiper arm and a wiper blade for connection to the wiper arm. <P>SOLUTION: The wiper blade 10 has: a clip base 17 mounted to a distal end of the wiper arm 20; a retaining member 39 arranged so as to be opposed to a base plate part 17f of the clip base 17 and mounted to the clip base 17; a leaf spring member 12 having an approximately central part 12a retained to the retaining member 39; and a lengthy blade rubber 11 retained to the leaf spring member 12. The retaining member 39 is mounted turnably around an axis in a longitudinal direction of the blade rubber 11, and an elastic member 99 is provided between the base plate part 17f of the clip base 17 and the retaining member 39. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wiper blade having a clip base rotatably attached to the tip of a wiper arm, a holding member rotatably attached to the clip base, a leaf spring member held by the holding member, and a blade rubber. About.

  Conventionally, for example, a flat blade wiper that wipes a surface to be wiped such as a windshield of a vehicle is known. (Patent Document 1)

  In such a flat blade wiper, a long leaf spring member is directly attached to a clip base attached to the tip of the wiper arm, and a blade rubber is attached to the leaf spring member.

  In other words, the leaf spring member is directly attached to the clip base, and the leaf spring member is not swingable about its longitudinal axis with respect to the clip base. At this time, as shown in FIG. 12, the lip portion 101 of the blade rubber 100 does not have a sufficient inclination angle with respect to the surface to be wiped S, and an optimum wiping angle has not been obtained. For this reason, defective wiping occurred.

Further, since there is no swing structure, when the wiper arm direction is reversed from the G direction to the B direction in the state shown in FIG. 12, a so-called judder phenomenon occurs in which the wiper blade 100 moves in the B direction in this state. There was also a problem to do.
JP 2006-290219 A

  An object of the present invention is to provide a wiper blade in which the lip portion of the wiper blade can obtain an optimum wiping angle with respect to the surface to be wiped and no judder phenomenon occurs.

  A clip base attached to the tip of the wiper arm; a holding member disposed opposite to the base portion of the clip base and attached to the clip base; a leaf spring member having a substantially central portion held by the holding member; and the plate A wiper blade having a long blade rubber held by a spring member, wherein the holding member is rotatably mounted about a longitudinal axis of the blade rubber, and the base portion of the clip base and the holding An elastic member is provided between the members.

  According to the present invention, the lip portion of the blade rubber can be set to an optimum wiping angle with respect to the surface to be wiped, and a judder phenomenon or the like can be prevented.

  Examples of the embodiment of the wiper blade according to the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram illustrating a state in which a wiper blade 10 according to an embodiment is applied to a vehicle C.
FIG. 2 is a diagram illustrating a state in which the wiper blade 10 is attached to the tip of the wiper arm 20.
FIG. 3 is a perspective view showing the appearance of the wiper blade 10.
FIG. 4 is a perspective view in which the wiper blade 10 is disassembled into each component.

  As shown in FIGS. 1 and 2, the wiper blade 10 is attached to the tip of a wiper arm 20 provided on the vehicle C in order to wipe the surface to be wiped S such as the windshield or rear glass of the vehicle C. Yes.

  The wiper arm 20 is connected to a wiper motor (not shown) via a wiper link, and can be reciprocated along the wiped surface S by driving the wiper motor (see arrows G and B).

  As shown in FIGS. 3 and 4, the wiper blade 10 includes an attaching means 16 attached to the distal end portion of a wiper arm 20 (see FIG. 2), a vertebra (plate spring member) 12 attached to the attaching means 16, A spoiler 14 attached to cover the vertebra 12 and a blade rubber 11 attached to the vertebra 12 are provided.

  As shown in FIGS. 8A and 8B, the attachment means 16 includes a clip body 18 attached to the tip of the wiper arm 20, a clip base 17 attached to the clip body 18, and a swingable attachment to the clip base 17. A holding frame member (holding member) 39, and an elastic body (elastic member) 99 provided between the clip base 17 and the holding frame member 39.

  As shown in FIG. 8B, the clip base 17 has a substantially U-shaped cross section, and includes a substrate portion 17f and two side wall portions 17g formed on both sides thereof. The side wall portions 17g and 17g are provided with shaft holes 17e and 17d through which the rivet 51 passes. The diameter of the shaft hole 17e is set smaller than the diameter of the shaft hole 17d.

  In addition, a pair of extending portions 17a are formed at both ends of the substrate portion 17f so as to extend downward in FIG. 8B, and the pair of extending portions 17a have holes 17b for inserting the bushes 33 therein. Each is provided. In addition, the extension part 17a formed in the other end of the board | substrate part 17f is not illustrated in FIG. 8B.

  The clip body 18 includes a pair of side wall portions 18b that abut on the inside of the pair of side wall portions 17g of the clip base 17, and a connecting wall 18d that connects the pair of side wall portions 18b.

  A clip portion 18c is formed below one end (left side in FIG. 8B) of the connecting wall 18d, and the tip of the wiper arm 20 can be detachably attached to the clip portion 18c. The side walls 18b, 18b are formed with notches 18a for fitting the rivets 51 from one side wall 18b to the other side wall 18b.

  The rivet 51 has a shaft portion 51PL that fits into the shaft hole 17d of the side wall 17g of the clip base 17, and a shaft portion 51PS that fits into the shaft hole 17e of the side wall 17g, and is attached to the clip base 17 so as to be rotatable. It is done. The diameter of the shaft part 51PS is set smaller than the diameter of the shaft part 51PL. The clip base 17 is rotatable around the rivet 51 with respect to the clip body 18 in FIG. 8A.

  The holding frame member 39 includes a rectangular frame portion 39e and L-shaped locking pieces 39c formed at the lower corners of the frame portion 39e, and includes an opening 39d of the frame portion 39e. A pair of extending portions 39a projecting upward in FIG. 8B is provided on both edge portions (edge portions on the longitudinal direction side of the vertebra 12).

  Holes 39b into which the bushes 33 are fitted are formed in the pair of extending portions 39a. In addition, each extending portion 39 a comes into contact with the back surface of the extending portion 17 a of the clip base 17.

  As shown in FIG. 8B, a gap 39s between the tip 39ca of the locking piece 39c that holds the vertebra 12 and the frame 39e is formed to be substantially the same as the thickness of the vertebra 12.

  Then, the shaft portions 51PL and 51PS of the rivet 51 are fitted into the shaft hole 17d and the shaft hole 17e of the clip base 17, and the tip portion of the shaft portion 51PS protruding from the shaft hole 17e is crimped (referred to as eyelet processing). A rivet 51 is rotatably attached to the clip base 17.

  Next, the clip body 18 is inserted between the pair of side walls 17g of the clip base 17, and the shaft portion 51PL of the rivet 51 is fitted into the notch 18a of the clip body 18. Thereby, the clip base 17 is rotatably attached to the clip body 18.

  Further, the pair of extending portions 39a of the holding frame member 39 are brought into contact with the back sides of the pair of extending portions 17a of the clip base 17, and as shown in FIG. The bush 33 is inserted, and the swing shaft 34 is inserted into the hole 33 a of the bush 33. Thereby, the holding frame member 39 is attached to the clip base 17 so as to be swingable.

  Then, as shown in FIG. 7, an elastic member 99 is provided between the substrate portion 17f of the clip base 17 and the holding frame member 39 by, for example, insert molding. As shown in FIG. 7, the elastic member 99 surrounds the swing shaft 34 and is in surface contact with the back surface of the substrate portion 17 f of the clip base 17 by the insert molding, so that the opening 39 d of the holding frame member 39 (see FIG. 8B). ). When the wiper blade 10 is assembled, the elastic member 99 comes into surface contact with the upper surface of the substantially central portion 12a (see FIG. 4) of the vertebra 12 as shown in FIG.

  The vertebra 12 is made of resin or metal having elasticity, is formed in a long shape, and has a curved shape in a bow shape with respect to the long direction. As shown in FIG. 4, the holder 13 is attached to the vertical bra 12 at a predetermined interval.

  As shown in FIG. 4, the spoiler 14 has a long shape slightly longer than the vertebra 12 and is formed of an elastic member such as rubber. A groove 24 is formed on the lower surface 14a (in FIG. 4) of the spoiler 14.

  The groove 24 extends in the longitudinal direction of the spoiler 14 while the cross-sectional shape exhibits a reverse convex shape capable of sandwiching both side edges of the vertebra 12, and the width of the opening 24 a of the groove 24 is narrow. Yes. The vertical bra 12 can be inserted into the groove 24.

  The groove 24 has a width dimension and a height dimension necessary for inserting the vertical bra 12 when viewed in a cross section orthogonal to the extending direction of the spoiler 14.

  A mounting opening 14d in which an upper portion thereof is cut out is formed at a substantially central portion of the spoiler 14, and the upper wall surface of the groove 24 is opened by the mounting opening 14d. The locking piece 39c of the mounting means 16 can be inserted into the groove 24 from the mounting opening 14d.

  As shown in FIG. 3, each stopper 15 is joined to both end surfaces 14 c of the spoiler 14. As shown in FIG. 4, each stopper 15 has a receiving portion 15a having the same cross-sectional shape as the spoiler 14 and a wall portion 15b that closes one end of the receiving portion 15a.

  The holder 13 has a plate portion 13b as shown in FIG. 6, and folded portions 13c and 13c are formed on both sides of the plate portion 13b. A predetermined gap is formed between the tip portions 13ca and 13ca and the plate portion 13b. L1 is formed, and the vertebra 12 is inserted into the gap L1.

  Furthermore, side walls 13d and 13d extending downward are formed at the tips of the folded portions 13c and 13c, and flanges 13a and 13a projecting inward are formed at the lower ends thereof. The flanges 13a and 13a are parallel to the plate portion 13b. A space 23 is formed by the side walls 13d and 13d and the flanges 13a and 13a.

  As shown in FIG. 4, the blade rubber 11 is formed of a resin elastic member that can slide on the surface to be wiped S without damaging the surface to be wiped S, and has a long shape.

  The blade rubber 11 is formed to have substantially the same length as the vertebra 12, and as shown in FIG. 5, a head 11 b that is inserted into the space 23 of the holder 13 and has a rectangular cross section, and the head 11 b A neck portion 11c extending downward from the neck portion 11c, a wiping portion 11a formed on the lower portion of the neck portion 11c for wiping the surface to be wiped S, and a pair of flanges 11d protruding laterally from the neck portion 11c.

  The thickness of the neck portion 11c is set to be substantially the same as the distance 13e between the flanges 13a of the holder 13 shown in FIG.

  The cross-sectional shape of the wiping portion 11a has a substantially inverted triangular shape in FIG. The flange 11d can be brought into contact with the lower wall surface 14a of the spoiler by tilting the neck portion 11c. (See FIGS. 10 and 11)

  The tip portion 11e of the wiping portion 11a abuts on the surface to be wiped S, and the tip portion 11e slides on the surface to be wiped S (see FIGS. 1 and 5). The blade rubber 11 has a shape having the neck portion 11c as described above, that is, a so-called “neck inversion structure”.

  The head 11 b of the blade rubber 11 is inserted into the space 23 of the plurality of holders 13 attached to the vertebra 12 and attached to the vertebra 12. Next, the vertebra 12 is attached to the spoiler 14 by being inserted into the groove 24 of the spoiler 14 in this state.

  Then, both ends of the vertebra 12 protruding from both ends of the spoiler 14 are press-fitted into the stoppers 15, and the stoppers 15 are attached to both ends of the vertebra 12. By attaching each stopper 15 to each end face of the spoiler 14 by this attachment, the open end 24c of the groove 24 of the spoiler 14 is closed.

  Accordingly, each stopper 15 prevents the blade rubber 11 from falling off from each end face 14c of the spoiler 14 and enhances the design of the appearance of each end face 14c of the spoiler 14 (see FIG. 3).

  In a state where the vertebra 12 is accommodated in the spoiler 14, the substantially central portion 12a of the vertebra 12 is exposed from the mounting opening 14d provided in the substantially central portion of the spoiler 14, and both side ends of the substantially central portion 12a. The attachment means 16 is attached to the attachment opening 14d by engaging the engagement piece 39c of the attachment means 16 with the portion. The tip of the wiper arm 20 is attached to the attachment means 16.

  Next, the operation at the time of wiping the wiper blade 10 will be described.

  When the wiper blade 10 is moved in the left direction (G direction in FIG. 1) by the operation of the wiper arm 20, the holding frame member 39 is tilted with respect to the clip base 17 and the blade at the same time as shown in FIG. The rubber 11 is similarly inclined.

  Due to the inclination of the holding plate portion 39, the wiper blade 10 is inclined more greatly than the conventional wiper blade with respect to the wiped surface S, and the right side (in FIG. 10) of the elastic member 99 is pressed and compressed by this inclination. Deform. As a result, the wiper blade 10 has an appropriate wiping angle with respect to the surface to be wiped S. Further, due to the compressive deformation of the elastic member 99, the sliding contact pressure with respect to the wiped surface S of the wiper blade 10 becomes appropriate. For this reason, the wiping effect of the wiper blade can be improved.

  Further, when the sliding direction of the wiper blade 10 is changed from the left direction to the right direction in FIG. 10, the holding frame member 39 rotates clockwise about the swing shaft 34, as shown in FIG. Although the holding frame member 39 is inclined with respect to the clip base 17, the holding frame member 39 is tilted by the elastic member 99 between the substrate portion 17 f of the clip base 17 and the holding frame member 39. Performed smoothly.

  Further, the clockwise rotation of the holding frame member 39 causes the blade rubber 11 to be smoothly reversed from the state shown in FIG. 10 to the state shown in FIG. Can be prevented.

  The tilting of the holding frame member 39 with respect to the surface to be wiped S and the elastic deformation of the elastic member 99 enable tilting with respect to the surface to be wiped S at an optimum wiping angle as compared with the conventional wiper blade. The wiping performance that could not be realized with a conventional wiper blade can be obtained.

  Further, since the holding frame member 39 is rotatably attached to the clip base 17 and the elastic member 99 is provided between the clip base 17 and the holding plate means 39, it is possible to cope with each vehicle type that cannot be handled only by tilting the blade rubber 11. The inclination of the wiped surface S can also be handled.

  Further, since the elastic member 99 wraps the swing shaft 34 by insert molding, the swing shaft 34 is protected, and rusting of the swing shaft 34 can be prevented. Since the elastic member 99 is integrally insert-molded as described above, the number of parts is reduced, the number of assembling steps is reduced, the assembling is facilitated, and the inexpensive wiper blade 10 can be provided.

  Since the elastic member 99 is formed so as to enter the opening 39 d of the holding frame member 39, the elastic member 99 comes into surface contact with the vertebra 12 and also functions as a non-slip of the vertebra 12 with respect to the holding frame member 39. Further, for the same reason, the elastic member 99 is prevented from coming off between the substrate portion 17f of the clip base 17 and the holding frame member 39.

  The above-described embodiment is a flat wiper blade for winter, but may be of a specification corresponding to the summer (for example, change of blade rubber material), and is limited to the above-described embodiment. is not.

It is a figure showing the state where wiper blade 10 concerning an example was applied to vehicle C. FIG. 3 is a view showing a state where the wiper blade 10 is attached to the tip of the wiper arm 20. 1 is a perspective view showing an appearance of a wiper blade 10. FIG. It is the perspective view which decomposed | disassembled the wiper blade 10 into each component. It is sectional drawing of the wiper blade 10 obtained along the II line | wire shown in FIG. It is a perspective view which shows a holder. It is drawing for demonstrating a mode that the attachment means was mounted | worn to a vertebra by pinching | interposing a vertebra, and is sectional drawing obtained along the II-II line | wire shown in FIG. It is a perspective view of the attachment means for demonstrating the structure and attachment method of an attachment means. FIG. 5 is an exploded perspective view showing the attachment means in an exploded manner for each component in order to explain the configuration of the attachment means and the attachment method. It is drawing for demonstrating a mode that the attachment means was mounted | worn with a vertebra by pinching | interposing a vertebra, and is sectional drawing obtained along the III-III line | wire shown in FIG. It is drawing for demonstrating the blade rubber operation | movement in an outward path, and is sectional drawing obtained along the III-III line | wire shown in FIG. It is drawing for demonstrating the blade rubber operation | movement in a return path, and is sectional drawing obtained along the III-III line | wire shown in FIG. It is sectional drawing which shows the conventional wiper blade.

Explanation of symbols

10 Wiper blade 11 Blade rubber 12 Leaf spring member (vertebra)
12a Approximate center part 17 Clip base 17a Extension part 17b Shaft hole 17d Shaft hole 17e Shaft hole 17f Substrate part 17g Side wall part 18 Clip body 20 Wiper arm 33 Bushing 34 Oscillating shaft 39 Holding frame member (holding member)
39a Extension part 39b Shaft hole 39c Locking piece 39d Opening part 39e Frame part 51 Rivet 99 Elastic body

Claims (3)

A clip base attached to the tip of the wiper arm, a holding member disposed opposite to the base portion of the clip base and attached to the clip base, a leaf spring member having a substantially central portion held by the holding member, A wiper blade having a long blade rubber held by a leaf spring member,
The holding member is attached so as to be rotatable around the longitudinal axis of the blade rubber,
A wiper blade characterized in that an elastic member is provided between the base portion of the clip base and the holding member.   A shaft is provided between the base portion of the clip base and the holding member, the holding member is rotatably attached to the shaft, and the elastic member is insert-molded between the clip base and the holding member. The wiper blade according to claim 1, wherein   The wiper blade according to claim 2, wherein the holding member has an opening.

Images