JP5158866B2 - Wiper device - Google Patents

Description

  The present invention belongs to the technical field of a wiper device provided in a vehicle such as an automobile.

  In general, in a wiper device, a pivot holder having a cylindrical portion on which a wiper shaft is supported in a penetrating manner is fixed to a vehicle body, and a wiper arm is provided on a wiper shaft protruding from a distal end portion of the pivot holder. The base end portion of the link is integrally connected to the wiper shaft protruding from the portion, and the rod that transmits the driving force from the wiper motor is pivotally connected to the distal end portion of the link, so that the wiper shaft is properly aligned with the drive of the wiper motor. There is a configuration in which a wiper arm connected to a wiper shaft wipes the window surface in reverse rotation. In such a thing, there exists a problem that smooth operation | movement will be impaired when rainwater infiltrates into the site | parts connected rotatably, such as the bearing part of the wiper axis | shaft of a pivot holder, and the connection part of a link and a rod. Therefore, as a means for preventing rainwater from entering the bearing portion and the pivot portion, there is known one in which a pivot holder cover is fitted to the wiper shaft.

As an example of such a thing, a pivot holder cover, a cylindrical part that fits around the cylindrical part of the pivot holder, and a cover part (umbrella part) that extends from the cylindrical part in the outer diameter direction and covers the pivot holder In addition, a configuration has been proposed in which an engagement piece is provided that includes a protrusion that extends toward the proximal end of the cylindrical portion and engages with an engagement groove formed in the pivot holder.
JP 2004-82756 A

  However, in the above-mentioned conventional one, the inner diameter of the pivot holder cover cylindrical portion is brought into close contact with the outer diameter of the upper end portion of the pivot holder cylindrical portion, the protrusion of the engagement piece is engaged with the engagement groove, the umbrella portion By engaging the protrusion formed on the through hole formed in the pivot holder, the pivot holder cover is attached to the pivot holder, and the cover lid extends from the cylindrical portion to the outer diameter side. The part (umbrella part) is configured to be engaged with the pivot holder at one place in the circumferential direction. For this reason, it is conceivable that the umbrella part is rattled, and when this happens, it is assumed that the waterproof effect is impaired or abnormal noise occurs, and the problem to be solved by the present invention is here. is there.

The present invention was created in view of the above-described circumstances to solve these problems. The invention of claim 1 is directed to a wiper shaft to which a wiper arm is attached at a tip portion, and a wiper shaft. A pivot holder having a cylinder portion that is movably supported and a vehicle body fixing portion that is fixed to the vehicle body, a link mechanism connected to the base end portion of the wiper shaft, and a rotational force transmitted to the wiper shaft via the link mechanism. A wiper device comprising a wiper motor and a pivot holder cover attached to the pivot holder , wherein a plurality of stoppers and stoppers are provided between the pivot holder cover and the pivot holder in the cylinder axial direction of the cylinder portion. Upon providing the locking means, in a position facing the pivot holder cylinder portion upper end surface of the pivot holder cover is elastically deformed by the locking is performed by said locking means pin With respect Ttohoruda cylindrical top end surface provided with a pressing means for pressure bonding in the cylinder axis direction, the Some of the plurality of locking means, the locking means for locking the lower side position than the pivot holder cylinder portion upper surface to pivot holder Is a wiper device provided.
According to a second aspect of the present invention, the pivot holder cover is configured to include a cylindrical portion that is externally fitted to the wiper shaft, and a cover portion that extends from the cylindrical portion toward the outer diameter side and covers the pivot holder. a wiper device according to claim 1 which is composed of a plurality of collision ribs formed abutted covering portion on the end faces of the pivot holder tube portion.
A third aspect of the present invention, collision rib is a wiper apparatus according to claim 2 which is formed by presence equal gap in the direction Ri circumferential relative end faces of the pivot holder tube portion.
The invention according to claim 4 is the wiper device according to any one of claims 1 to 3 , wherein a plurality of locking means for the pivot holder cover and the pivot holder are provided on the outer diameter side of the crimping means.
According to a fifth aspect of the present invention, the locking means is constituted by a locking projection formed between the pivot holder cover and the pivot holder, and a locking receiver for locking to the locking projection. The wiper device according to any one of 1 to 4 .
The invention of claim 6 is the wiper device according to any one of claims 1 to 5 , wherein the pivot holder cover is integrally formed of a resin material.

According to the first aspect of the present invention, the pivot holder cover does not rattle with respect to the pivot holder, and even if vibration occurs, it can be waterproofed without being displaced.
According to the second aspect of the present invention, it is possible to easily mount the pivot holder cover to the pivot holder and to ensure the crimping of the pivot cover.
According to the invention of claim 3, the crimping means can be formed simultaneously with the integral formation of the pivot holder cover, and can be easily formed with a simple configuration.
According to the invention of claim 4, the pressure-bonding force by the pressure-bonding means is not concentrated at any place in the circumferential direction, and the effect of preventing rattling can be exhibited more remarkably.
According to the fifth aspect of the present invention, it is possible to easily mount the pivot holder cover and to prevent the pivot holder cover from further rattling.
According to the sixth aspect of the present invention, each locking means can be easily formed when the pivot holder and the pivot holder cover are integrally formed, thereby contributing to cost reduction.
According to the invention of claim 7, the wiper device can be reduced in weight and can be easily mounted on the wiper shaft.

Next, embodiments of the present invention will be described with reference to the drawings.
In the drawings, reference numeral 1 denotes a wiper motor constituting a modular wiper device, and a motor bracket 2 is integrally fixed to an open end of a bottomed cylindrical yoke 1a constituting the wiper motor 1. The motor bracket 2 has a yoke fastening portion 2a formed in a cylindrical shape to be fastened to the yoke opening end, and a motor shaft tip (not shown) of the wiper motor 1 extending so that the driving force of the motor shaft can be obtained. A bottomed cylindrical speed reducing portion 2b in which gears are internally mounted for speed reduction is integrally formed. The speed reduction portion 2b rotatably supports a drive shaft 1a disposed orthogonal to the motor shaft, and the tip of the drive shaft 1a penetrates the bottom surface of the speed reduction portion 2b and protrudes to the outside. On the other hand, a gear cover 2c is fixed to the opening end side of the speed reduction portion 2b in a screw-fastened manner. Further, the motor bracket 2 is formed with a vehicle body mounting seat 2d extending forward and a frame mounting piece 2e extending rearward.

Reference numeral 4 denotes a plate-like crank arm whose base end is integrally connected to the front end of the drive shaft 1a. The front end of the crank arm 4 has a base end of the first rod 5 made of a pipe material. The parts are rotatably connected (pivoted) via a ball joint 5a. The front end of the first rod 5 extends leftward, and is pivotally connected to the base end of the plate-like first link 6 via a ball joint 5b. A base end portion (lower end portion) of a first wiper shaft (pivot shaft) 7 provided integrally with a first wiper arm 7a is integrally connected to a distal end portion of one link 6. Further, the base end portion of the second rod 8 made of a pipe material is connected to the base end portion of the first link 6 via a ball joint 8a so as to be rotatable (pivotally connected). ) The second rod 8 is disposed so as to be positioned in front of the first rod 5, and a plate-like second link is provided at a distal end portion extending rightward from the proximal end portion of the crank arm 4. The base end portion of 9 is rotatably connected (pivoted) via a ball joint 8b. A base end portion (lower end portion) of a second wiper shaft (pivot shaft) 10 on which a second wiper arm 10a is integrally provided is integrally connected to a distal end portion of the second link 9. ing.
As described above, the link mechanism configured between the wiper motor 1 and the first and second wiper shafts 7 and 10 is configured such that when the wiper motor 1 is driven, the crank arm 4 rotates in one direction, By causing the second rods 5 and 8 to perform a reciprocating reversal operation in the left-right direction, the first and second links 6 and 9 reciprocate and reciprocate in a predetermined swinging range. The shafts 7 and 10 are reciprocally reversed and rotated, and the first and second wiper arms 7a and 10a are configured to wipe the window surface W in a synchronized state.

Reference numeral 11 denotes a first pivot holder for supporting the first wiper shaft 7 positioned on the left side in a penetrating manner and supporting the first wiper shaft 7 on the housing. The first pivot holder 11 is integrally formed using a metal material. A cylindrical portion 11a that supports the first wiper shaft 11 in a penetrating manner so as to be rotatable (rotatable), and extends from the cylindrical portion 11a in the outer diameter direction (left side in FIG. 1). A vehicle body mounting seat 11b for fixing to the vehicle body is provided. Reference numeral 12 denotes a second pivot holder for supporting the second wiper shaft 10 positioned on the right side in a penetrating manner and supporting it on the housing. The second pivot holder 12 is integrally formed using a metal material. A cylindrical portion 12a that supports the second wiper shaft 10 in a penetrating manner so as to be rotatable (rotatable), and extends from the outer peripheral surface of the cylindrical portion 12a in the outer diameter direction (right side in FIG. 1). And a vehicle body mounting seat 12b (corresponding to a vehicle body fixing portion) for fixing to the vehicle body.
In addition, the first and second pivot holders 11 and 12 are formed with cylindrical support pieces 11c and 12c extending toward opposite sides, respectively, and these support pieces 11c and 12c are The first and second pivot holders 11 and 12 are integrally connected to each other by fitting into both ends of the frame material 13 formed in a pipe shape and crimping the fitting portions. It is configured. Further, a frame mounting piece 2e extending rearward of the motor bracket 2 is configured to be screwed to the right side of the frame member 13, whereby the first and second pivot holders 11, 12, The wiper motor 1 is configured to be an integrated unit (modular type) in an integrated state.
The assembly unit configured as described above is fixed to the vicinity of the window inside the vehicle body via the vehicle body mounting seat 2d of the motor bracket 2 and the vehicle body mounting seats 11b and 12b of the first and second pivot holders 11 and 12. Yes.

  A cap 14 is provided at the projecting tip of the first wiper shaft 7 projecting from the tip (upper end) of the first pivot holder 11, while projecting from the tip (upper end) of the second pivot holder 12. A pivot holder cover 15 that covers the second pivot holder 12 is provided at the protruding tip of the second wiper shaft 10. As will be described later, the cap 14 and the pivot holder cover 15 are structural members of a waterproof structure in the wiper device, and the first and second wiper shaft projecting tip portions projecting from the cap 14 and the pivot holder cover 15 are windows. The first and second wiper arms 7a and 10a are provided so as to project outward through the through-hole formed in the portion W, and are provided at the projecting tips.

  The pivot holder cover 15 is formed by integrally molding a resin material so that the weight of the wiper device can be reduced. The pivot holder cover 15 is formed on the protruding tip portion 10b of the second wiper shaft 10. A cylindrical portion 15 a that fits outside and a cover lid portion 15 b that extends from the base edge of the cylindrical portion 15 a to the outer diameter side and covers the second pivot holder 12. The cover 15b is formed in the second pivot holder 12 with a stepped shape upward from the upper end piece 15c made of a flat plate abutted against the upper end surface of the second pivot holder cylinder part 12a and the right end part of the upper end piece 15c. A mounting seat covering piece 15d that covers a portion of the vehicle body mounting seat 12b excluding the bolt fixing portion 12d and a stepped shape downward from the left end portion of the upper end piece 15c to cover the connecting portion of the support piece 12c and the frame member 13 The connecting portion covering piece 15e extends downward from the rear edge of the upper end piece 15c, the mounting seat covering piece 15d, and the connecting portion covering piece 15e, and faces the rear outer peripheral surface of the pivot holder cylinder portion 12b with a predetermined gap. Following the outer periphery covering piece 15f and the front half of the upper end piece 15c, the second wiper shaft 10 is connected to the second wiper shaft 10 and reciprocally reversely oscillates within a predetermined oscillating range (shown by a dashed line in FIGS. 2 and 3). It is integrally formed and a pivotally connected portion cover piece 15g covering the tank 9. As shown in FIGS. 1 and 2, the pivot holder cover 15, as shown in FIGS. The outer peripheral covering piece 15f is configured to have an inclined posture that becomes lower toward the rear.

The pivot holder cover 15 is configured so as to be prevented from being pulled out in the cylinder axis direction with respect to the second pivot holder 12, to be prevented from rotating in the circumferential direction, and to be mounted without rattling.
That is, as shown in FIG. 7 , the second pivot holder 12 is formed with a first locking projection 12e that is located in front of the upper outer peripheral surface of the cylindrical portion 12a and protrudes to the outer diameter side (forward). Yes. Further, a second locking projection 12f protruding rearward is formed on the rear end surface in the vicinity of the bolt fixing portion 12d in which the screw hole of the vehicle body mounting seat 12b is formed. Furthermore, a third locking projection 12g that protrudes in a square shape is formed on the lower portion of the rear outer peripheral surface of the cylindrical support piece 12c of the second pivot holder 12 so as to form a flat plate-like lower end surface. However, these first, second, and third locking projections 12e, 12f, and 12g correspond to the locking means of the present invention, and are formed in a state of being positioned on the outer diameter side of the cylindrical upper end surface 12h. Yes.

On the other hand, as shown in FIG. 9, the lower side surface (inner side surface) of the pivoting portion covering piece 15 g of the pivot holder cover 15 is formed by forming a locking hole in a projecting piece extending downward. The first locking receiver 15h is formed, and the locking hole of the first locking receiver 15h is fitted over the first locking protrusion 12e of the second pivot holder 12, so that the first locking receiver The lower hole edge of the locking hole of 15h is locked to the lower end surface of the first locking protrusion 12e, so that the locking in the cylinder axis direction is prevented and the rotation is prevented. It is configured. In addition, a second locking receiver 15i configured by a locking hole facing in the vertical direction is formed at the rear portion of the mounting seat covering piece 15d, and the second locking receiver 15i is formed in the second pivot holder 12. The second locking projection 12f is externally fitted, and the lower edge of the locking hole of the second locking receiver 15i is locked to the lower end surface of the second locking projection 12f. It is configured so as to be a lock that is prevented from being pulled out and is prevented from being rotated. Further, a third locking receiver 15j is formed on the inner surface of the outer peripheral covering piece 15f following the connecting portion covering piece 15e. The third locking receiver 15j is formed by a protruding piece protruding forward. The upper surface of the second pivot holder 12 is applied to the lower surface of the third locking projection 12g of the second pivot holder 12, so that the locking in the cylindrical axis direction is prevented. The second and third locking receivers 15h, 15i, 15j correspond to the locking means of the present invention.

Further, as shown in FIG. 8, a projecting rib 15k corresponding to the pressure-bonding means of the present invention is formed on the lower end surface of the upper end piece 15c of the pivot holder cover 15. The projecting rib 15k is a second pivot. Opposite to the upper end surface 12h of the holder cylinder portion 12a, it projects downward and is formed in a plurality in the circumferential direction. The protruding ribs 15k are formed when the pivot holder cover 15 is integrally molded with a resin material as described above, and can be elastically deformed.
The pivot holder cover 15 has a length from the lower surface of the upper end piece 15c to the locking end of the first locking receiver 15h (the lower end edge of the locking hole) from the upper end surface 12h of the second pivot holder 12 to the first. length to one locking projection 12e lower end substantially equal, upper secondary latch receiving member from the lower end surface of the surface 15c 15 i of the locking end until the length the second pivot holder (lower edge of the locking hole) 12 Is substantially equal to the length from the upper end surface 12h to the lower end of the second locking projection 12f, and the length from the lower surface of the upper end piece 15c to the upper end of the third locking receiver 15j is the second pivot holder upper end surface 12h. To the lower end of the third locking projection 12g.

When the pivot holder cover 15 is attached to the second pivot holder 12, the projecting rib 15k is abutted against the second pivot holder upper end surface 12h, and the first, second, and second positions located on the outer diameter side of the projecting rib 15k. The three locking receivers 15h, 15i, and 15j are set to be mounted by being locked to the first, second, and third locking protrusions 12e, 12f, and 12g, respectively. In this case, the first, second, and third locking receivers 15h, 15i, and 15j are in the state in which the protruding rib 15k is elastically deformed (crushed) by the amount of the protruding rib 15k. The second and third locking projections 12e, 12f, and 12g are configured to be locked in a forcibly fitted manner, but these locking portions are located on the outer diameter side of the protruding rib 15k. Each locking portion can be easily locked in a state where the protruding rib 15k is pressed. Thus, the pivot holder cover 15 includes the first, second, and third locking projections 12e, 12f, and 12g and the first, second, and third locking receivers 15h that are positioned on the outer diameter side of the protruding rib 15k. , 15i and 15j are engaged with each other, so that the protruding rib 15k is pressed against the upper end surface 12h of the second pivot holder, but each engaging portion is located at an appropriate position in the circumferential direction on the outer diameter side of the protruding rib 15k. Therefore, the protruding rib 15k can be more securely crimped, thereby preventing the projecting rib 15k from being pulled out from the second pivot holder 12, and preventing the rotation in the circumferential direction, and preventing rattling. It is comprised so that it may be in a state.
Note that the protruding ribs 15k of the present embodiment are formed in a state where there is an appropriate interval in the circumferential direction, and are configured so that the crimping force does not concentrate at any location in the circumferential direction. These protruding ribs 15k may be provided at equal intervals in the circumferential direction. In such a case, the crimping force of the upper end piece 15c of the pivot holder cover 15 to the second pivot holder upper end surface 12h is circumferential. A more uniform state can be achieved in the direction.

Further, the pivot holder cover 15 is provided with a configuration for draining rainwater applied to the pivot holder cover 15 from a portion where a portion requiring waterproofing can be avoided to the outside.
In other words, the outer edge of the cover 15b of the pivot holder cover 15 and the right outer edge of the outer cover 15f is continuous with the rear edge of the mounting seat cover 15d at the upper end. The lower end is formed so as to be inclined toward the left side, and a first water blocking wall 15m is formed at the inclined portion in a state of standing rearward from the outer peripheral covering piece 15f. The first water blocking wall 15m dams rainwater applied to the cover lid portion 15b, guides the dammed rainwater backward (downward), and discharges the rainwater from the lower end of the first water blocking wall 15m to the outside. It is configured as follows. Furthermore, it is an outer edge of the cover 15b, and is on the left outer edge of the pivot cover 15g and the connecting cover 15e so as to stand upward from the covers 15g and 15e. Second and third water blocking walls 15n and 15p are formed, and a fourth water blocking wall 15q is formed on the left outer edge of the outer peripheral covering piece 15f so as to stand rearward from the outer peripheral covering piece 15f. However, the second, third, and fourth water blocking walls 15n, 15p, and 15q are integrally formed continuously. And these 2nd, 3rd, 4th water stop walls 15n, 15p, and 15q are the upper end piece 15c, the connection part covering piece 15e, the outer periphery covering piece 15f, and the rainwater concerning the pivoting part covering piece 15g in the cover part 15b. It is set so that the dammed rainwater is guided downward.

Here, as described above, the pivoting portion covering piece 15g is formed so as to be able to cover the second link 9 that is reciprocally reversed and swung within a predetermined swinging range. Is formed to protrude forward so as to have a sharp pointed end, and the protruding end is formed to be positioned forward of the pivotal portion of the second link 9 with the second rod 8. . As a result, the rainwater guided forward (downward) along the pivotal portion covering piece 15g causes the front end (lower end) of the second water blocking wall 15n formed at the left outer edge and the pivotal portion covering piece 15g. The rainwater flowing out from the right outer edge of the second link 9 is considered so as not to come into contact with the second rod 8 of the second link 9.
Further, the outer peripheral covering piece 15f is formed so as to be located behind the base end portion of the second pivot holder tube portion 12a. As a result, the rainwater guided rearward (downward) along the outer periphery covering piece 15f is the rear end (lower end) or outer periphery of the first and fourth water blocking walls 15m, 15q formed at the left and right outer end edges. Consideration is given so that rainwater flowing out from the rear end (lower end) of the cover piece 15f is not applied to the bearing portion of the second wiper shaft 10 with the second pivot holder 12.

Further, the portion reaching the upper end portion of the third water stop wall 15p and the fourth water stop wall 15q located at the portion formed in the L-shaped portion extending from the connecting portion cover portion 15e to the outer periphery cover portion 15f is in layout. The lower portion 15r has a low wall height (standing length). For this reason, it is assumed that the amount of dammed rainwater is reduced in the lower portion 15r, and as a countermeasure against this, the dispersion path 15s is formed along the third and fourth water blocking walls 15p and 15q.
That is, the dispersion path 15s is configured by forming a pair of protrusions 15t protruding outward (upward and rearward) along the third and fourth water blocking walls 15p and 15q, and the connecting portion covering piece 15e. The rainwater heading toward the third and fourth water blocking walls 15p and 15q along the outer peripheral covering piece 15f is strongly changed in direction by facing the protrusion 15s or the groove 15u formed between the protrusions 15t. And is set so as to be discharged downward along the dispersion path 15s (protrusions 15t, grooves 15u). The rainwater sprayed on the protrusions 15s and 15u is forced to change direction by hitting the protrusions 15t and the grooves 15u, and is guided downward along the dispersion path 15s (protrusions 15t and grooves 15u). It is configured to prevent the rainwater from overflowing from the lower portion 15r and flowing out to the connecting portion side between the support piece 12c and the frame member 13.

  Incidentally, as the waterproof structure of the first wiper shaft 7, the first pivot holder 11 itself is formed with an outer peripheral covering piece 11d that covers the bearing portion at the base end portion of the first wiper shaft 7 and the cylindrical portion 11a. A pivot cover 11e that covers the first link 6 that reciprocally reverses and swings within a predetermined swing range (dashed line in FIG. 3), a water blocking wall 11f that prevents rainwater from flowing out toward the first link 6, A guide path 11g and the like for guiding the rainwater blocked by the water blocking wall 11f downward are formed. Furthermore, by attaching a cap 14 to the tip of the first wiper shaft 7 that protrudes from the tip of the first pivot holder 11, rainwater flows out smoothly through the guide path 11 g of the first pivot holder 11. It has become a structure.

  In the embodiment of the present invention configured as described above, the wiper device includes a frame member 13 on which the motor bracket 2 of the wiper motor 1 and the first and second wiper shafts 7 and 10 are supported in a penetrating manner. The second pivot holders 11 and 12 are connected to each other, and necessary members such as the crank arm 4, the first and second rods 5 and 8, the first and second links 6 and 9 are incorporated into an integrated modular. The vehicle body mounting seats 2d, 11b and 12b formed on the motor bracket 2 and the first and second pivot holders 11 and 12 are screwed to the housing. In this case, the pivot holder cover 15 incorporated in the second wiper shaft 12 so as to cover the second pivot holder 12 has the first, second, and third locking receivers 15h, 15i, and 15j connected to the second pivot holder 12. By engaging with the first, second and third locking projections 12e, 12f and 12g formed on the upper end piece 15c, the projecting rib 15k formed on the upper end piece 15c becomes the second pivot holder cylindrical portion 12a. The upper end surface 12h is mounted in a pressure-bonded state. As a result, the pivot holder cover 15 does not rattle with respect to the second pivot holder 12, and even if vibration occurs in the pivot holder cover 15, there is no problem of misalignment, and reliable waterproofing is always achieved. it can.

  As described above, the pivot holder cover 15 in which the present invention is implemented is such that the protruding rib 15k serving as the pressure-bonding means is not pressed against the upper end surface 12h of the second pivot holder and does not rattle. Since 15k is elastically deformable, it is possible to prevent a trouble that makes it difficult to mount the pivot holder cover 15 to the second pivot holder 12, and to crimp the second pivot holder 12 to the second pivot holder 12. Is certain.

  In this case, the crimping means is a plurality of circumferentially protruding ribs 15k formed on the upper end piece 15c facing the cylinder end surface 12h of the second pivot holder cylinder part 12a. Can be formed at the same time as the pivot holder cover 15 is integrally formed, so that there is no trouble of separately forming a crimping means, etc., and it can be easily formed with a simple configuration.

  In addition, in this structure, the plurality of protruding ribs 15k are provided at appropriate intervals in the circumferential direction, so that the crimping force does not concentrate at any location in the circumferential direction, and the protruding ribs In the case where 15k is formed at equal intervals in the circumferential direction, the pressure-bonding force is made uniform in the circumferential direction, and the effect of preventing rattling can be exhibited more remarkably.

  Further, in this device, the first, second, and third locking projections 12e, 12f, and 12g serving as locking means and the first, second, and third locking receivers 15h, 15i, and 15j are locked. Since the portion is provided on the outer diameter side of the projecting rib 15k forming portion, each retaining portion is retained in a state where the projecting rib 15k is pressed against the upper end surface 12h of the second pivot holder tube portion 12a. The operation is easy and the mounting work is facilitated, and the crimping to the second pivot holder 12 by the protruding rib 15k is further ensured, and the pivot holder cover 15 can be further prevented from rattling.

  Further, since the locking means is configured to lock the first, second, and third locking protrusions 12e, 12f, and 12g to the first, second, and third locking receivers 15h, 15i, and 15j, In addition to the simple structure, each of the locking means can be easily formed when the first pivot holder 12 and the pivot holder cover 15 are integrally formed, thereby contributing to cost reduction.

  Further, in this case, since the pivot holder cover 15 is formed of a resin material, the wiper device can be reduced in weight and can be easily attached to the second wiper shaft 10.

It is a front view explaining the attachment state of a wiper device. It is a front view of a wiper device. It is a top view of a wiper device. FIG. 3 is a right side view in FIG. 2. FIG. 3 is a left side view in FIG. 2. FIGS. 6A and 6B are a plan view and a front view, respectively, of the assembling process of the second pivot holder. 7A, 7B, 7C, and 7D are a front view, a plan view, a side view, and a bottom view of the second pivot holder, respectively. 8A and 8B are a side view and a front view of the pivot holder cover, respectively. 9 (A), (B), (C), and (D) are respectively a cross-sectional view taken along line XX in FIG. 8 (A), a rear view of the pivot holder cover, and a cross-sectional view taken along line YY in FIG. 8 (A). It is ZZ sectional drawing of FIG. 8 (A).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wiper motor 4 Crank arm 5 First rod 7 First wiper shaft 8 Second rod 9 Second link 10 Second wiper shaft 11 First pivot holder 12 Second pivot holder 12a Tube portion 12b Car body mounting seat 12e First locking projection 12h Upper end surface 14 Cap 15 Pivot holder cover 15a Cylindrical portion 15b Cover lid portion 15c Upper end piece 15f Outer peripheral cover piece 15g Pivoting portion cover piece 15h First locking receiver 15k Projecting rib

Claims (6)

A wiper shaft to which a wiper arm is attached at the distal end portion, a pivot holder having a cylindrical portion that rotatably supports the wiper shaft, and a vehicle body fixing portion that is fixed to the vehicle body, and a link mechanism that is connected to the base end portion of the wiper shaft When the wiper motor is transmitted to the wiper shaft rotational force through a link mechanism, a wiper device provided with a pivot holder cover attached to the pivot holder, the pivot holder cover, between the pivot holder, When providing a plurality of locking means for preventing and rotating the cylinder portion in the cylinder axis direction, the locking means is locked at a portion of the pivot holder cover that faces the upper end surface of the pivot holder cylinder portion. provided with a crimping means for crimping the tube axis direction with respect to the pivot holder cylinder portion upper surface is elastically deformed, some of the plurality of locking means by a pivot Wiper apparatus is locking means for locking the lower side portion is provided than pivot holder cylinder portion upper surface to holder. Pivot holder cover includes a cylindrical portion fitted around the wiper shaft, it is constituted by a covering lid portion from the cylindrical portion to cover the extension out pivot holder to the outer diameter side, crimping means, on the pivot holder tube portion The wiper device according to claim 1, comprising a plurality of projecting ribs formed on a cover lid portion that abuts against the end surface. Collision ribs wiper device according to claim 2 which is formed by presence equal gap in the direction Ri circumferential relative end faces of the pivot holder tube portion. The wiper device according to any one of claims 1 to 3 , wherein a plurality of locking means for the pivot holder cover and the pivot holder are provided on the outer diameter side of the crimping means. Locking means comprises a locking projection which is formed between the pivot holder cover and pivot holder, any of claims 1 to 4 is constituted by a latch receiving member for locking the engaging projection 1 The wiper device according to item. The wiper device according to any one of claims 1 to 5 , wherein the pivot holder cover is integrally formed of a resin material.

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