JP5569404B2 - Wiper blade - Google Patents

Description

  The present invention relates to a wiper blade used in a wiper device for a vehicle such as an automobile.

  In Patent Document 1, as a wiper blade for winter, a pair of arm pieces project from a neck portion where a lip for wiping at the tip of a blade rubber and a base portion are connected, and the upper side of the blade rubber is included. A technique is disclosed in which a step portion is provided on the lower open edge of the cover covered with the cover, and the tip of the arm piece is abutted and engaged with the step portion to prevent snow from entering and accumulating inside the cover. Has been.

JP 2008-126853 A

  In the disclosed technique of Patent Document 1, since the tip of the arm piece of the blade rubber is in contact with and engaged with the step portion of the lower open edge of the cover from the lower side by its own elasticity, it is rubbed during the wiping operation. When vibration or twisting occurs, the tip of the arm piece may be separated from the corresponding stepped portion, and snow scraped off from the wiping surface may enter the cover.

  Therefore, the present invention provides a wiper blade that can reliably prevent snow scraped from the wiping surface from entering the cover.

The wiper blade of the present invention includes a blade rubber, a first vertebra disposed along the base of the blade rubber, and a base of the blade rubber and the first vertebra, and holds both of them. A second vertibra to be fixed, a holder plate provided with a holder portion for the wiper arm and connected to a central portion in the longitudinal direction of the second vertibra, and the holder plate and the blade rubber fixed to the holder plate. And a cover made of an elastic material formed in a substantially C-shaped cross section covering and covering them entirely.

The blade rubber includes an upper portion and a lower portion wider than the upper portion, and includes a groove portion along the length direction on both sides in the width direction. second vertebra and the cover is provided with a flange portion for mutually superimposed vertically on each widthwise side portion thereof, these flanges, and fitted disposed in the groove in a state superimposed vertically fixed Then, the flange portion of the cover is supported on the lower portion of the base portion of the blade rubber, and when the blade rubber is wiped and reversed, the inner side on both sides in the width direction of the cover and the second vertebra The main feature is that the width-direction side portions of the cover can be stretched and deformed by the gaps generated in FIG.

  According to the present invention, since the flange portion of the cover and the flange of the second vertebra are overlapped in the vertical direction, they are fitted and arranged in the groove portions on both sides of the base portion of the blade rubber, so that the friction vibration is generated during the wiping operation. Alternatively, even when twisting occurs, the flange portion of the cover does not detach from the corresponding groove portion, and the sealed state is maintained.

  As a result, it is possible to reliably prevent the snow scraped off from the wiping surface from entering and accumulating in the cover, and to avoid impairing the wiping performance of the blade rubber.

The perspective view which shows the whole external appearance of the wiper blade which concerns on this invention. The disassembled perspective view of a wiper blade. Sectional drawing which follows the AA line of FIG. 1 which shows 1st Embodiment of this invention. Sectional drawing similar to FIG. 3 which shows 2nd Embodiment of this invention. Sectional drawing similar to FIG. 3 which shows 3rd Embodiment of this invention. Sectional drawing similar to FIG. 3 which shows 4th Embodiment of this invention. The side view of the cover which shows 5th Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  A wiper blade according to the first embodiment shown in FIGS. 1 and 2 includes a blade rubber 1 and a first vertebra 7 for dispersing and equalizing the pressing force acting on the blade rubber 1 in the length direction thereof. It is equipped with.

  As shown in FIG. 3, the blade rubber 1 includes a lip 2 for wiping that rubs a wiping surface of a front window panel or rear window panel of an automobile, and a base portion that is continuously provided via the lip 2 and the neck portion 4. 3 is provided.

  The base 3 is composed of an upper part 3U having a substantially rectangular cross section on the upper side and a lower part 3L wider than the upper part 3A. The base part 3 has a length direction on both sides of the connecting part of the upper part 3U and the lower part 3L. The groove part 5 along is formed.

  The first vertebra 7 is formed in the shape of a strip that is slightly wider than the base 3 with an appropriate spring steel material, and is disposed so as to overlap the upper surface of the upper portion 3U of the base 3.

  The upper portion 3U and the first vertebra 7 are held and fixed by a second vertebra 8 that functions as a retainer member.

  The second vertebra 8 is made of an appropriate synthetic resin material, and is formed with a C-shaped channel cross-sectional portion 8A for holding the first vertebra 7 and a narrower width than this, with the lower edge as a flange portion 8a. Thus, the rectangular channel cross-sectional portion 8B that holds the upper portion 3U is formed in a continuous multi-stage cross-sectional shape.

  In the present embodiment, slits 6 are formed in the length direction on both sides in the width direction of the upper portion 3U, and a third vertebra 9 made of a leaf spring material is fitted and disposed in the slit 6. The third vertebra 9 is held by the channel section 8B of the second vertebra 8 together with the upper portion 3U, and has a function of suppressing the twisting operation of the upper portion 3U during the wiping operation.

  A holder plate 11 provided with a holder portion 10 for a wiper arm (not shown) is attached to a central portion in the length direction of the second vertebra 8.

  The holder portion 10 is a clip 12 that is detachably inserted into and engaged with the end portion of the wiper arm, and a U-shaped bracket that is rotatably supported by a support shaft 14 between opposing walls in the width direction. 13.

  The holder portion 10 has a bottom wall of the bracket 13 superimposed on the upper surface of the central portion of the holder plate 11 and is fixed by caulking with two caulking pins 15 at intervals in the length direction.

  Both the holder part 10 and the holder plate 11 are made of a corrosion-resistant metal material such as stainless steel.

  Both end portions in the length direction of the holder plate 11 are offset downward at both side edges in the width direction by steps corresponding to the plate thickness to form holding portions 11a having a C-shaped channel cross section, and the holding portions 11a Is fitted on the channel cross section 8A on the upper side of the second vertebra 8.

  On the upper wall of the channel cross section 8A, a locating hole 8b is formed at the position corresponding to the caulking head of the caulking pin 15 protruding to the lower surface side of the holder plate 11, and the caulking head falls and engages. The holder unit composed of the holder plate 11 and the holder portion 10 is appropriately positioned.

  A cover 20 is sandwiched and fixed between the bottom wall of the holder portion 10 and the holder plate 11.

  The cover 20 is formed in an approximately C-shaped cross section with an elastic material, for example, a rubber material similar to the blade rubber 1, and the lower edges on both sides in the width direction are inwardly facing flange portions 20a.

  A through hole 20b is formed at the center in the length direction of the cover 20 so as to correspond to the crimping pins 15 and 15 of the holder unit. An annular spacer 21 is inserted into the through-hole 20b, and the holder 21 is clamped between the bottom wall of the holder portion 10 and the holder plate 11 as described above by the caulking pins 15 and 15 through the spacer 21. It is caulked and fixed integrally with the unit.

  The flange portion 20a of the cover 20 is overlapped and bonded to the lower side of the flange portion 8a of the second vertebra 8, and is fitted and disposed in the groove portion 5 of the base portion 3 of the blade rubber 1 together with the flange portion 8a. .

  Accordingly, the cover 20 covers the entire portion from the holder plate 11 of the holder unit to the upper portion 3U of the base portion 3 of the blade rubber 1 so as to be covered.

  In the present embodiment, a seal lip 20 c is projected in a substantially L shape at the end of the flange portion 20 a of the cover 20, and the seal lip 20 c is a deep bottom portion of the groove portion 5 and a flange portion of the second vertebra 8. It is sandwiched and fixed between the terminal 8a and exhibits a sealing function and a retaining function.

  In the present embodiment, the cover 20 is extruded to have a constant cross-sectional shape as in the case of the blade rubber 1, and a rubber cap member 22 is attached to the cross-section open portions of both ends of the cover 20 in the longitudinal direction. Thus, the open section is sealed. The cap member 22 has a leg portion 22a that is inserted into a gap formed between the cover 20 and both lower half portions of the second vertebra 8, and the leg portion 22a is press-fitted into the gap so that its own elasticity is obtained. It is designed to be able to be removed by the action.

  The holder unit composed of the holder portion 10 and the holder plate 11 and the cover 20 are sub-assembled, and the holder unit assembled with the cover 20 is further sub-assembled to the second vertebra 8. The assembly of the holder unit to the second vertebra 8 is performed by fitting and holding the holding portion 11a of the holder plate 11 and the second vertebra 8 in sliding contact with each other in the length direction. . At this time, the caulking head of the caulking pin 15 protruding from the lower surface of the holder plate 11 falls into the locating hole 8b of the second vertebra 8 and engages the holder unit with the cover 20 and the second vertebra 8 Positioning in the longitudinal direction is performed. At the stage where this positioning is performed, the flange portions 8a and 20a are bonded together.

  Then, the assembly of the second vertebra 8 and the cover 20, the blade rubber 1, and the first vertebra 7 is performed as follows.

  First, the third vertebra 9 is press-fitted into the slit 6 of the upper portion 3U of the base portion 3 of the blade rubber 1 to be sub-assembled.

Next, the end in the length direction of the upper portion 3U is collated with the channel section 8B on the lower side of the terminal in the length direction of the second vertebra 8, and the flange portion on the lower edge of the channel section 8B 8a and the length direction end of the overlapping portion of the flange portion 20a of the lower edge of the cover 20 and the length direction end of the groove portion 5 of the base portion 3 of the blade rubber 1, the blade rubber 1, The two vertebras 8 and the cover 20 are press-fitted into each other in the length direction. After that, the terminal in the length direction of the first vertebra 7 is collated with the channel section 8A on the upper stage side in the terminal in the length direction of the second vertebra 8, and these are press-fitted into each other to engage the first The upper surface of the above-described upper portion 3U is pressed and fixed by the vertebra 7.

  Finally, the cap member 22 is press-fitted and engaged with the cross-section opening portion of the end of the cover 20 in the length direction, and the cross-section opening portion is sealed to complete the assembly.

  According to the wiper blade having the configuration of the first embodiment, both sides of the base portion 3 of the blade rubber 1 in a state where the flange portion 20a of the cover 20 and the flange portion 8a of the second vertebra 8 are overlapped in the vertical direction. The groove 5 is inserted and arranged. Thereby, even when sliding vibration or torsion occurs during the wiping operation on the wiping surface, the flange portion 20a of the cover 20 is not detached from the groove portion 5, and the sealed state in the cover 20 is maintained.

  As a result, it is possible to reliably prevent the scraped snow from entering and accumulating inside the cover 20 and gradually growing, and the wiping performance of the blade rubber 1 is not hindered.

  Further, in this embodiment, the seal lip 20c at the end of the flange portion 20a of the cover 20 is sandwiched and fixed between the back bottom portion of the groove portion 5 and the end of the flange portion 8a of the second vertibra 8, The detachment of the flange portion 20a of the cover 20 from the groove portion 5 can be prevented more reliably. In addition, the intrusion of water into the cover 20 can be prevented by the sealing function of the seal lip 20c.

  Further, the cover 20 is extruded in the same manner as the blade rubber 1, but the cross-section opening portion at the end in the longitudinal direction of the cover 20 is sealed by inserting the cap member 22. Does not occur.

  FIG. 4 shows a second embodiment of the present invention. In this embodiment, one or more grooves 20d along the length direction are formed on the inner surfaces of both sides of the cover 20 in the width direction.

  According to the structure of the second embodiment, the expansion / contraction deformation of the both sides in the width direction of the cover 20 during the wiping reversal operation of the wiper blade is favorably performed by the setting of the groove portion 20d, and snow adheres to the outer surface of the side portion of the cover 20. Even so, it can be dropped by this expansion and contraction action, and the effect of preventing snow from entering the cover 20 can be enhanced.

  FIG. 5 shows a third embodiment of the present invention. In this embodiment, the thickness of both sides in the width direction of the cover 20 is gradually changed so as to become thinner toward the flange portion 20a side. It is.

  Even in the structure of the third embodiment, due to the above-described gradual change in thickness, the expansion and contraction of the both sides in the width direction of the cover 20 during the wiping reversal operation of the wiper blade is favorably performed. Even if snow adheres to the surface, it can be dropped by this expansion and deformation action, and the effect of preventing snow from entering the cover 20 can be enhanced.

  FIG. 6 shows a fourth embodiment of the present invention. In this embodiment, the inner side of the flange portion 20a on both sides in the width direction of the cover 20 and the channel cross-sectional portions 8A and 8B of the second vertebra 8 are connected. A cushioning material 23 for shape retention made of a member excellent in elastic resilience, such as a synthetic resin line material or a piano wire, is inserted and disposed in a gap generated between the step portion.

  According to the structure of the fourth embodiment, the presence of the cushion material 23 prevents the side portion in the width direction of the cover 20 from being recessed and deformed inward, thereby avoiding a decrease in the effect of preventing snow adhesion. Can do.

  FIG. 7 shows a fifth embodiment of the present invention. In this embodiment, the outer surface of at least the half portion on the flange 20a side of both sides in the width direction of the cover 20 is roughened by applying a drawing pattern or the like. Is formed.

  According to the structure of this fifth embodiment, when the wiper blade wiping reversal operation is performed, both sides in the width direction of the cover 20 are stretched and deformed, and the rough surface S is slightly stretched and adhered even on the outer surface thereof. The falling action of snow can be performed satisfactorily.

  The present invention is not limited to the structure of the above-described embodiment, and the cross-sectional shapes of the blade rubber 1, the second vertical rib 8, the cover 20, and the like can be changed in any way depending on the specifications.

DESCRIPTION OF SYMBOLS 1 ... Blade rubber 3 ... Base part 5 ... Groove part 7 ... 1st vertical bar 8 ... 2nd vertical bar 8a ... Flange part 10 ... Holder part 11 ... Holder plate 20 ... Cover 20a ... Flange part 20c ... Seal lip 20d ... Groove part 22 ... Cap member 23 ... Cushioning material S for shape retention ... Rough surface

Claims (7)

Blade rubber,
A first vertibra disposed along a base of the blade rubber;
A second vertebra disposed along the base of the blade rubber and the first vertebra, and holding both of them together;
A holder plate having a holder portion for the wiper arm and connected to a longitudinal central portion of the second vertebra;
A cover made of an elastic material formed in a substantially C-shaped cross section that is fixed to the holder plate and covers and covers the entire base portion of the blade rubber from the holder plate ,
The blade rubber is composed of an upper portion and a lower width portion wider than the upper portion, and has a groove portion along the length direction on both sides in the width direction between them ,
The second vertebra and the cover is provided with a flange portion for mutually superimposed vertically on each widthwise side portion thereof,
These flange portions are fixedly inserted and arranged in the groove portion in a state where they are overlapped in the vertical direction, and the flange portion of the cover is supported on the lower portion of the base portion of the blade rubber,
During the wiping and reversing operation of the blade rubber, both sides in the width direction of the cover can be stretched and deformed by a gap formed between the inner side of the cover in the width direction and the second vertebra. Wiper blade.   The end of the flange portion of the cover also serves as a retainer that is protruded in a substantially L shape and is clamped and fixed between the bottom of the groove portion and the end of the flange portion of the second vertebra. The wiper blade according to claim 1, further comprising a seal lip.   The wiper blade according to claim 1 or 2, wherein the cover is extruded to have a constant cross-sectional shape, and a cross-section opening portion of a terminal in a length direction thereof is sealed with a cap material.   The wiper blade according to any one of claims 1 to 3, wherein the cover includes groove portions along the length direction on inner surfaces of both sides in the width direction.   The wiper according to any one of claims 1 to 4, wherein the cover is formed by gradually changing the thickness of both side portions in the width direction so as to become thinner toward the flange portion side. blade.   The shape retaining cushion material is disposed between the inner side of the flange portion side on both sides in the width direction of the cover and the second vertebra, according to any one of claims 1 to 5. The wiper blade described. The wiper blade according to any one of claims 1 to 6, wherein an outer surface of at least a half portion on the flange portion side on both sides in the width direction of the cover is a rough surface.

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