JP4981626B2 - Vehicle wiper device - Google Patents

Description

  The present invention relates to a vehicle wiper device that is provided in a vehicle such as an automobile and wipes the window glass of the vehicle.

  Conventionally, a vehicle such as an automobile is provided with a wiper device for wiping off deposits such as raindrops adhering to the front window glass and the rear window glass. The wiper device has a wiper arm that is rotatably attached to a drive shaft provided in a vehicle body, and a wiper blade that is attached to a tip portion of the wiper arm, and the drive shaft is driven by a wiper motor disposed inside the vehicle body. Then, the wiper blade swings on the wind glass to wipe off the deposits.

  In such a wiper device, in order to improve the wipeability of the wiper blade, a spring is incorporated in the wiper arm, and the wiper blade is urged toward the wind glass by the spring force of the spring to wind the wiper blade with a predetermined pressing force. It is in contact with the glass. However, for example, if the urging force by the spring, that is, the pressing force of the wiper blade is increased in order to improve the wiping property at high speed traveling, judder (shake) is generated in the wiper blade during normal traveling, and the wiping property is lowered. There is a case.

Thus, for example, in the wiper device disclosed in Patent Document 1, a guide rib (stabilizer) is integrally provided on the end cap of the wiper blade, and the guide rib is disposed inside a wiper arm having a top wall and a pair of side walls. The wiper blade is supported by the wiper arm via the guide rib to reduce judder generated in the wiper blade.
JP 2005-523202 A

  However, in the wiper device disclosed in Patent Document 1, the guide rib attached to the wiper blade is formed in a shape that matches the cross-sectional shape of the wiper arm, and the guide surface is guided along both side walls of the wiper arm. Therefore, support force (preload) is not applied to the guide rib from each side wall of the wiper arm, and the judder of the wiper blade cannot be sufficiently reduced.

  An object of the present invention is to reduce judder generated on a wiper blade and improve the wiping property of a vehicle wiper device.

A vehicle wiper device according to the present invention is a vehicle wiper device for wiping a window glass of a vehicle, and includes a drive head attached to a drive shaft on a vehicle body side, a top wall, and a pair of side walls. A wiper arm rotatably mounted on the drive head; a rubber holder; a blade rubber held by the rubber holder; a wiper blade mounted on a tip of the wiper arm; and provided inside the wiper arm. A spring for urging the wiper arm toward the window glass; and a main body that is provided with an attachment foot that engages with the back side of the rubber holder and is detachably attached to the rubber holder via the attachment foot ; A support portion that protrudes from the main body portion and is disposed inside the wiper arm and contacts the inner surfaces of the pair of side walls in an elastically deformed state And having a stabilizer was.

  In the vehicle wiper device according to the present invention, the rubber holder is provided with holding claws for holding the blade rubber, and the both sides of the main body engage with the rubber holder on both sides in the longitudinal direction of the holding claws. A pair of mounting feet is provided.

  The wiper device for a vehicle according to the present invention is characterized in that an insertion hole is provided at one end of the rubber holder, and an engaging claw that is inserted into and engaged with the insertion hole is provided on both sides of the main body.

  In the vehicle wiper device according to the present invention, the support portion is formed so that a longitudinal dimension on a tip side of the support portion is shorter than a longitudinal dimension of the support portion on the main body side.

  In the vehicle wiper device according to the present invention, the stabilizer is formed of an elastic body.

  The vehicle wiper device according to the present invention is characterized in that the support portion and the main body portion are formed of different members.

According to the present invention, since the stabilizer attached to the wiper blade is brought into contact with each side wall of the wiper arm in an elastically deformed state, the wiper blade can be supported and held in a state where a preload is applied by the wiper arm. Thereby, the wiper blade can be reliably supported and held by the wiper arm, and judder generated in the wiper blade can be reduced. Further, since the support portion of the stabilizer is supported and held by the wiper arm inside the wiper arm having the top wall and the pair of side walls, the versatility of the stabilizer can be improved and the aesthetics of the vehicle may be impaired. Absent. Furthermore, since the stabilizer is detachably attached to the wiper blade, the wiper device can be easily adapted to the difference in specifications with or without the stabilizer. Moreover, the versatility of a stabilizer can be improved.

  Further, according to the present invention, the pair of attachment feet provided on the stabilizer is engaged with the rubber holder with the holding claw provided on the rubber holder sandwiched in the longitudinal direction, so that the holding claw moves in the longitudinal direction of the stabilizer. The movement of the stabilizer can be restricted to prevent the stabilizer from being displaced.

  Furthermore, according to the present invention, an insertion hole is provided at one end of the rubber holder, and engaging claws that are inserted into and engaged with the insertion hole are provided on both sides of the stabilizer main body. Can be supported and held by engaging.

  Furthermore, according to the present invention, the longitudinal dimension on the distal end side of the support part is formed shorter than the longitudinal dimension on the main body part side of the support part, so that, for example, the wiper arm is biased toward the window glass. Even when the internal space of the wiper arm is limited due to the arrangement of the spring, the support portion can be reliably accommodated inside the wiper arm.

  Furthermore, according to the present invention, since the stabilizer is formed of an elastic body, the stabilizer can be easily elastically deformed between the side walls of the wiper arm. Further, since the mounting portion and the mounting foot can be bent, the mounting of the stabilizer on the wiper blade can be facilitated.

  Furthermore, according to the present invention, by forming the support portion and the main body portion from different members, it becomes possible to manufacture a stabilizer made of a member that meets all conditions, and variations can be increased.

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

  FIG. 1 is a perspective view showing a state in which a vehicle wiper device according to an embodiment of the present invention is attached to a vehicle body, and FIG. 2 is an exploded perspective view showing a wiper arm and a wiper blade shown in FIG.

  The vehicle wiper device 11 (hereinafter referred to as the wiper device 11) is provided on the vehicle body 14 in order to wipe off deposits such as raindrops attached to the window glass 13 provided on the vehicle 12.

  The wiper device 11 has a drive head 15, and this drive head 15 is rotatably attached to a drive shaft 16 provided on the vehicle body 14. A wiper arm 17 is mounted on the drive head 15 so as to be swingable in a vertical direction, that is, in a direction approaching and moving away from the wind glass 13 at a base end portion 17a. .

  The wiper blade 18 has a tournament-type rubber holder 21, and the rubber holder 21 includes a primary lever 22 and a pair of secondary levers 23 that are pin-coupled to both ends in the longitudinal direction of the primary lever 22. . A connecting pin 24 is attached to the primary lever 22, and a connecting groove 17 c provided at the distal end portion 17 b of the wiper arm 17 is rotatably engaged with the connecting pin 24, so that the primary lever 22, that is, the rubber holder 21 is attached to the wiper arm 17. The distal end portion 17b is connected to be rotatable about the connecting pin 24. Holding claws 25 are provided at both ends in the longitudinal direction of the secondary lever 23, and the blade rubber 26 in contact with the window glass 13 is held by the secondary lever 23, that is, the rubber holder 21 by these holding claws 25. .

  A wiper motor (not shown) is provided inside the vehicle body 14, and the drive shaft 16 is driven by the wiper motor to swing within a predetermined range. Thus, when the wiper motor is operated, the wiper blade 18 and the wiper blade 18 swing on the wind glass 13 to wipe the wind glass 13. Moreover, it can respond to rubber holders other than the tournament type.

  FIG. 3 is a bottom view of the wiper arm, and FIG. 4 is a perspective view showing a cross-sectional shape of the wiper arm.

  The wiper arm 17 is formed by injection molding of a resin material, and includes a top wall 27 and a pair of side walls 28 perpendicular to the top wall 27, and has a U-shaped cross section. That is, the inside of the wiper arm 17 is a cavity, and the back surface of the cavity, that is, the wiper arm 17 facing the window glass 13 is opened. Reference numeral 29 denotes a rib for reinforcing the wiper arm 17. The wiper arm 17 can be made of a material other than resin (for example, iron).

  A spring 31 is provided inside the wiper arm 17. One end of the spring 31 engages with a locking block 32 provided on the drive head 15, and the other end engages with a locking block 33 provided inside the wiper arm 17. is doing. As a result, the wiper arm 17 is biased toward the wind glass 13 by the spring force of the spring 31, and the wiper blade 18 is applied with a predetermined pressing force from the wiper arm 17 and comes into elastic contact with the wind glass 13. ing.

  As shown in FIG. 2, a stabilizer 41 is attached to the wiper blade 18 in order to prevent judder, that is, tremor (vibration) in the wiping direction that occurs in the wiper blade 18 during wiping.

  5 is a perspective view showing details of the stabilizer, FIG. 6 is a side view showing a state where the stabilizer is attached to the wiper blade, and FIGS. 7A and 7B are respectively inserted into the wiper arms of the stabilizer. It is sectional drawing which shows the state before and behind.

  The stabilizer 41 is formed of an elastic body having a predetermined elasticity such as rubber, elastomer, resin, and the like, and is on the side of the driving head 15, that is, the side overlapping the wiper arm 17 with respect to the rubber holder 21, that is, the primary lever 22. A main body 42 to be attached to the secondary lever 23 is provided. The main body 42 is formed in a plate shape that is slightly curved according to the outer shape of the secondary lever 23, and is disposed on the tip side of the secondary lever 23 that does not overlap with the primary lever 22 so as to face the wiper arm 17. . A pair of attachment feet 43 are provided on both side portions of the main body portion 42 facing the wiping direction side, and the claw portions 43a provided at the tips of these attachment feet 43 are engaged with the back side of the secondary lever 23, The main body 42 is fixed to the secondary lever 23. Further, the rubber holder 21 can be fixed even by a flat holder.

  Here, as described above, the holding claws 25 for holding the blade rubber 26 are provided at both ends in the longitudinal direction of the secondary lever 23. These holding claws 25 are as shown in FIG. The secondary lever 23 is provided with a predetermined distance from the tip of the secondary lever 23 in the longitudinal direction. The stabilizer 41, that is, the main body 42, has a pair of attachment feet 43 provided on one side thereof, which are disposed on one side and the other side in the longitudinal direction of the holding claw 25, respectively, and a pair provided on the other side. Are attached to the secondary lever 23 so as to be disposed on one side and the other side of the holding claw 25 in the longitudinal direction. That is, the pair of attachment feet 43 provided on both side portions of the main body 42 are engaged with the secondary lever 23 with the holding claws 25 sandwiched in the longitudinal direction of the holding claws 25. As a result, the main body 42, that is, the stabilizer 41, is prevented from moving in the longitudinal direction when each attachment foot 43 abuts on the holding claw 25, and is prevented from being displaced in the axial direction. .

  As described above, in the wiper device 11, the pair of attachment feet 43 provided on the stabilizer 41 are engaged with the rubber holder 21 with the holding claw 25 sandwiched in the longitudinal direction. The movement in the direction can be restricted to prevent the stabilizer 41 from being displaced.

  Further, in the wiper device 11, since the stabilizer 41 is formed of an elastic body, the main body portion 42 and the attachment foot 43 can be elastically deformed. Therefore, the work of attaching the stabilizer 41 to the rubber holder 21 can be facilitated.

  As shown in FIG. 5, the body portion 42 is integrally provided with a pair of support pieces 44 as support portions. These support pieces 44 are formed symmetrically with each other and are arranged side by side in the wiping direction. Each of the support pieces 44 protrudes from the main body portion 42 toward the wiper arm 17 side, and as shown in FIG. When is attached, it is arranged inside the wiper arm 17 (inside each side wall 28). Each support piece 44 is formed in a substantially triangular plate shape whose longitudinal dimension on the distal end side is shorter than the longitudinal dimension on the proximal end side which is the main body portion 42 side, and each proximal end Between the tip and the tip of the wiping direction, and is bent into a “shape” with a convex shape in the wiping direction, and in a natural state (a state where it is not arranged inside the wiper arm 17), as shown in FIG. The width dimension W1 of the support piece 44 in the wiping direction is maximum at the bent portion. The longitudinal dimension is a dimension in a direction along the longitudinal direction of the wiper blade 18.

  As shown in FIG. 7A, the width dimension W <b> 1 of each support piece 44 in the wiping direction is set to be larger than the interval W <b> 2 between the inner surfaces of the side walls 28 in the portion of the wiper arm 17 that accommodates the support piece 44. When each support piece 44 is inserted into the wiper arm 17, as shown in FIG. 7B, each support piece 44 is elastically deformed in a direction to reduce its width dimension W <b> 1, and each side wall 28 in the bent portion. To come in contact with. That is, when the wiper blade 18 is attached to the wiper arm 17, one support piece 44 of the stabilizer 41 comes into contact with the inner surface of one side wall 28 of the wiper arm 17 in an elastically deformed state, and the other support piece 44 of the stabilizer 41 is The wiper arm 17 contacts the inner surface of the other side wall 28 in an elastically deformed state. As a result, the stabilizer 41 attached to the wiper blade 18 is supported in a state of being elastically deformed by the wiper arm 17, that is, in a state where a preload is applied, and the wiper blade 18 is reliably supported by the wiper arm 17 via the stabilizer 41. Will be. Therefore, even if the wiper device 11 starts the wiping operation and the judder is generated in the wiper blade 18, the wiper blade 18 is elastically supported by the wiper arm 17 via the stabilizer 41 at one end thereof, and the judder is reduced. Will be. The width dimension of each support piece 44 in the wiping direction at the tip thereof is narrower than the interval W2 between the side walls 28, so that each support piece 44 can be easily inserted into the wiper arm 17. .

  As described above, in the wiper device 11, the stabilizer 41 attached to the wiper blade 18 is brought into contact with each side wall 28 in the state of being elastically deformed inside the wiper arm 17, so that the wiper blade 18 is interposed via the stabilizer 41. By supporting the wiper arm 17, it is possible to reduce judder in the wiper blade 18, that is, tremor in the wiping direction.

  In the wiper device 11, each support piece 44 of the stabilizer 41 is brought into contact with each side wall 28 in an elastically deformed state. Therefore, even if judder occurs in the wiper blade 18, each judder causes the support piece 44 to be The wiper blade 18 can be reliably supported by the wiper arm 17 by preventing the wiper arm 17 from being separated from the inner surface of the wiper arm 17. Thereby, the inhibitory effect of the judder by the stabilizer 41 can be enhanced. Further, the stabilizer 41 is mounted near the tip of the rubber holder 21 on the side close to the drive shaft 16 so as to suppress the behavior of the wiper blade 18 on the end side, so that judder generated in the wiper blade 18 is effectively reduced. Can be made.

  Further, in the wiper device 11, since the support pieces 44 of the stabilizer 41 are supported by the wiper arm 17 inside the U-shape, the versatility of the stabilizer 41 can be improved. Further, when the wiper blade 18 is set on the wind glass 13, the stabilizer 41 is hidden by the wiper arm 17 and is difficult to visually recognize from the outside. Even if the stabilizer 41 is provided, the appearance of the wiper device 11 may be impaired. Absent.

  Further, in the wiper device 11, the stabilizer 41 is detachably attached to the wiper blade 18, so that the wiper device 11 can be easily adapted to the difference in specifications with or without the stabilizer 41. Moreover, the versatility of the stabilizer 41 can be improved.

  Furthermore, in the wiper device 11, each support piece 44 is formed in a plate shape that bends in a U-shape, and the width dimension in the wiping direction at the tip thereof is made narrower than the interval W2 between the side walls 28. The stabilizer 41 can be easily inserted into the wiper arm 17 even from the locked back state. Moreover, even if the internal space of the wiper arm 17 is limited, the support pieces 44 can be reliably accommodated in the wiper arm 17 by installing the support pieces 44 at a constant interval.

  Further, in the wiper device 11, as shown in FIG. 6, the tip of each support piece 44 is offset in a direction away from the tip side of the secondary lever 23, and the support piece 44 avoids the locking block 33 that supports the spring 31. The wiper arm 17 is arranged inside. Thereby, even if it is a case where the internal space of the wiper arm 17 is restrict | limited by arrange | positioning the spring 31, the support piece 44 can be reliably accommodated in the inside of the wiper arm 17. FIG.

  FIG. 8 is a perspective view showing a modification of the stabilizer shown in FIG.

  In the stabilizer 41 shown in FIG. 5, there are provided two types of attachment feet 43 for attaching the stabilizer 41 to the rubber holder 21, the feet having different lengths. On the other hand, in the stabilizer 41 shown in FIG. 8, the length of each leg 43 is substantially the same. As described above, the length and shape of the foot 43 of the mounting foot 43 provided on the stabilizer 41 can be arbitrarily set according to the shape of the secondary lever 23 to which the foot is attached. As shown in FIG. Not only can the feet 43 be formed to have substantially the same length, but the attachment feet 43 can be arbitrarily set such that they are all set to different lengths.

  FIGS. 9A and 9B are views showing modifications of the stabilizer shown in FIG. 5, respectively. FIG. 10 is a perspective view showing details of the stabilizer shown in FIG. 11A is a cross-sectional view taken along the line AA in FIG. 9B, FIG. 11B is a cross-sectional view taken along the line BB in FIG. 9B, and FIG. It is sectional drawing which follows the CC line in FIG.9 (b).

  In the modification shown in FIGS. 9 to 11, four insertion holes 45 are provided on the surface of one end of the secondary lever 23 facing the blade rubber 26, and the tip of the attachment foot 43 of the stabilizer 41 is respectively engaged with the tip. A claw portion 43b as a claw is provided. The stabilizer 41 is attached to one end of the rubber holder 21 by inserting and engaging the claw portion 43 b with the insertion hole 45. Thereby, even if the holding lever 25 is not provided on the secondary lever 23, the stabilizer 41 can be attached to the wiper blade 18 so that the movement of the stabilizer 41 in the longitudinal direction is restricted to prevent displacement.

  Not only the insertion holes 45 are provided for the respective claw portions 43b, but insertion holes for receiving all the claw portions 43b may be provided.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, the wiper blade 18 includes the tournament-type rubber holder 21, but is not limited thereto, and the wiper blade includes other types of rubber holders such as a so-called flat blade. A blade may be used.

  In the above-described embodiment, the support portion is formed as a pair of support pieces 44. However, the present invention is not limited to this, as long as it contacts the inner surface of each side wall 28 of the wiper arm 17 in an elastically deformed state. It is good also as the shape and structure of.

  Furthermore, in the above-described embodiment, the main body 42 and the support piece 44 are integrally formed. However, the present invention is not limited thereto, and these may be formed separately to be assembled or mounted. You may make it integrally form with a separate material by two-color molding. For example, when the main body 42 is made of metal and the support piece 44 is made of resin, it can be attached to a metal rubber holder.

  Furthermore, the wiper device 11 of the present invention can be applied to both a front window glass and a rear window glass of a vehicle.

1 is a perspective view showing a state in which a vehicle wiper device according to an embodiment of the present invention is attached to a vehicle body. It is a disassembled perspective view which shows the wiper arm and wiper blade which are shown in FIG. It is a bottom view of a wiper arm. It is a perspective view which shows the cross-sectional shape of a wiper arm. It is a perspective view which shows the detail of a stabilizer. It is a side view which shows the mounting state to the wiper blade of a stabilizer. (A), (b) is sectional drawing which shows the state before and behind insertion in the inside of the wiper arm of a stabilizer, respectively. It is a perspective view which shows the modification of the stabilizer shown in FIG. (A), (b) is a figure which shows the modification of the stabilizer shown in FIG. 5, respectively. FIG. 10 is a perspective view showing details of the stabilizer shown in FIG. 9. 9A is a sectional view taken along line AA in FIG. 9B, FIG. 9B is a sectional view taken along line BB in FIG. 9B, and FIG. 9C is a sectional view taken along line C-B in FIG. It is sectional drawing which follows a C line.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Vehicle wiper apparatus 12 Vehicle 13 Window glass 14 Car body 15 Drive head 16 Drive shaft 17 Wiper arm 17a Base end part 17b End part 17c Connection groove 18 Wiper blade 21 Rubber holder 22 Primary lever 23 Secondary lever 24 Connection pin 25 Holding claw 26 Blade Rubber 27 Top wall 28 Side wall 29 Rib 31 Spring 32, 33 Locking block 41 Stabilizer 42 Main body 43 Mounting foot 43a Claw 43b Claw (engaging claw)
44 Support piece (support part)
45 Insertion hole W1 Width dimension W2 Interval

Claims (6)

A vehicle wiper device for wiping a vehicle windshield,
A drive head attached to a drive shaft on the vehicle body side;
A wiper arm that includes a top wall and a pair of side walls, and is rotatably attached to the drive head at a base end portion;
A wiper blade provided with a rubber holder and a blade rubber held by the rubber holder, and attached to the tip of the wiper arm;
A spring provided inside the wiper arm and biasing the wiper arm toward the wind glass;
A mounting foot that engages with the back side of the rubber holder is provided, a main body portion that is detachably mounted on the rubber holder via the mounting foot, and protrudes from the main body portion and is disposed inside the wiper arm. A vehicle wiper device comprising: a stabilizer including a support portion that is in contact with an inner surface of the side wall in an elastically deformed state.   2. The vehicle wiper device according to claim 1, wherein the rubber holder is provided with holding claws for holding the blade rubber, and both side portions of the main body portion are respectively attached to the rubber holder on both sides in the longitudinal direction of the holding claws. A wiper device for a vehicle, characterized in that a pair of engaging feet for engagement is provided.   The wiper device for a vehicle according to claim 1, wherein an insertion hole is provided at one end of the rubber holder, and engagement claws that are inserted into and engage with the insertion hole are provided at both sides of the main body. A wiper device for a vehicle.   The wiper device for a vehicle according to any one of claims 1 to 3, wherein the support portion is formed such that a longitudinal dimension on a distal end side of the support portion is shorter than a longitudinal dimension of the support portion on the main body side. A vehicle wiper device.   5. The vehicle wiper device according to claim 1, wherein the stabilizer is formed of an elastic body. 6. The vehicle wiper device according to any one of claims 1 to 5, wherein the support portion and the main body portion are made of different members.

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