JP2014051219A - Vehicle wiper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle wiper device which reduces the loss of a biasing force.SOLUTION: A vehicle wiper device comprises: a swing member 23 which is provided so as to integrally rotate with a drive shaft part 11 reciprocated by a drive device; an inclined member 24 which is supported so as to tilt around a tilt axis B1 that is in a twisting position relationship with a rotation axis A1 of the drive shaft part 11, the inclined member 24 being provided with a wiper fixing shaft 32 for fixing a wiper arm 31; and a wiper arm biasing member F where one end is supported by the swing member 23, the wiper arm biasing member F having a compression coil spring 25 for providing a biasing force to the inclined member 24. In the swinging member 23, a rotation support member 26 which supports one end of the compression coil spring 25 is rotatably provided.

Description

  The present invention relates to a vehicle wiper device.

  Conventionally, as a vehicle wiper device, a pivot holder that pivotally supports a pivot shaft is fixed to a vehicle body, and a proximal end portion of a swing lever is fixed to a proximal end portion of the pivot shaft that protrudes from a lower end of the pivot holder. In some cases, a wiper arm is connected to the tip of a pivot shaft protruding from the upper end of the pivot holder. The tip of the swing lever is connected to a link of a link mechanism that is operated by a wiper motor and swings at a predetermined angle. At the same time, the pivot shaft rotates to perform the wiper arm wiping operation.

  In such a vehicle wiper device, in Patent Document 1, the base end portion of the wiper arm is connected to the distal end portion of the pivot shaft so that the distal end side of the wiper arm can come into contact with and away from the wiping surface. Further, there is disclosed a structure in which an urging member is locked to a wiper arm and a swing lever directly or indirectly (via a transmission member).

  In this vehicle wiper device, the wiper arm can be urged toward the wiping surface by the urging force of the urging member interposed between the wiper arm and the swing lever, so a part of the wiper arm has a U-shaped cross section. As a result, it is not necessary to accommodate the biasing member, and the degree of freedom of the shape of the wiper arm can be improved.

JP 2008-273239 A

  However, in the above-described vehicle wiper device, if the biasing member is a compression coil spring, the surface that supports the compression coil spring may be orthogonal to the biasing direction of the compression coil spring depending on the rotation (tilting) angle of the wiper arm. There is a problem that the loss of the biasing force increases. Therefore, in order to compensate for the loss of the urging force and secure the necessary urging force, for example, the wire rod of the compression coil spring is thickened or the diameter of the compression coil spring is increased.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vehicle wiper device that can reduce loss of urging force.

  According to the first aspect of the present invention, the position of the swinging member provided so as to be integrally rotatable with the drive shaft that is reciprocally rotated by the drive device and the rotational axis of the drive shaft are intersected or twisted. A tilting member that is supported so as to be tiltable about a tilting shaft center and that is provided with a wiper fixing portion for fixing a wiper arm, and a compression spring that is supported at one end by the swinging member and applies a biasing force to the tilting member. A wiper device for a vehicle including a wiper arm biasing member having the wiper arm biasing member, wherein the pivot member is provided with a pivot support member that supports one end of the compression spring.

  According to this configuration, the swinging member is rotatably provided with the rotation support member that supports one end of the compression spring. Therefore, when the tilt angle of the wiper arm and the tilting member changes, the end of the compression spring is The angle shift with respect to the orthogonal direction of the urging | biasing direction of the compression spring of the surface to support can be reduced. Therefore, loss of the urging force due to the compression spring can be reduced. As a result, for example, even if the wire rod of the compression coil spring as the compression spring is thinned or the diameter of the compression coil spring is reduced, the necessary biasing force can be easily ensured.

  According to a second aspect of the present invention, in the vehicle wiper device according to the first aspect, a biased rotating member for receiving a biasing force from the other end of the compression spring rotates in the tilting member. The gist is that it is possible.

  According to this configuration, the tilting member is provided with a biased rotating member for receiving a biasing force from the other end of the compression spring so that the tilting angle of the wiper arm and the tilting member changes. In addition, it is possible to reduce the angular deviation of the surface receiving the urging force from the other end of the compression spring with respect to the direction perpendicular to the urging direction of the compression spring. Therefore, the loss of the urging force due to the compression spring can be further reduced.

  According to a third aspect of the present invention, in the vehicle wiper device according to the first or second aspect, a straight line passing through the center of each end of the compression spring when viewed from the axial direction of the tilting shaft is The gist is that it is set to form an angle of 45 ° or less with the rotation axis.

  According to this configuration, since the straight line passing through the center of each end of the compression spring as viewed from the axial direction of the tilting shaft is set to form an angle within 45 ° with the rotation shaft of the driving shaft portion, the driving shaft The arrangement space in the rotational axis radial direction of the part can be reduced.

  According to a fourth aspect of the present invention, in the vehicle wiper device according to any one of the first to third aspects, the wiper arm urging member is configured so as to correspond to the tilt angle of the tilt member with respect to the swing member. The gist of the invention is that the urging direction of the compression spring is switched between a state in which the wiper arm is urged toward the wiping surface and a state in which the wiper arm is urged toward the standing side.

  According to this configuration, since the compression spring switches between the state of urging the wiper arm toward the wiping surface and the state of urging the wiper arm toward the erection side according to the tilt angle of the tilt member, the wiper arm biasing member The so-called lockback function can also be integrated. In this case, the tilt angles of the wiper arm and the tilting member change greatly. However, by providing the rotation support member, the surface that supports one end of the compression spring in each state is orthogonal to the biasing direction of the compression spring. Since the direction can be maintained, the effect of reducing the loss of the urging force by the compression spring is increased.

According to a fifth aspect of the present invention, in the vehicle wiper device according to any one of the first to fourth aspects, the tilting member is supported by the swinging member so as to be tiltable.
According to this configuration, since the tilting member is supported by the swinging member, the member for urging the wiper arm (wiper arm urging member) is not separated into the both end sides of the drive shaft portion on one side. Will be aggregated. As a result, the wiper arm can be biased simply by interposing the wiper arm biasing member between the drive shaft portion and the wiper arm. For example, the mountability to the vehicle is improved.

  ADVANTAGE OF THE INVENTION According to this invention, the loss of the urging | biasing force in a vehicle wiper apparatus can be reduced.

The schematic diagram which shows the arrangement | positioning state of the wiper apparatus for vehicles in one Embodiment. The perspective view of the wiper arm biasing member in one Embodiment. (A) is a side view showing a normal energizing state in one embodiment. (B) is a side view showing a standing urging state in one embodiment. The partial expansion perspective view for demonstrating the control piece in one Embodiment. The partially expanded perspective view which shows the standing-up biasing state in one Embodiment. The top view for demonstrating arrangement | positioning of the wiper apparatus for vehicles in one Embodiment. (A) is a partially expanded perspective view for demonstrating the control piece in another example. (B) is a partially expanded side view for demonstrating the control piece in another example. (A) is a partially expanded perspective view for demonstrating the control piece in another example. (B) is a partially expanded side view for demonstrating the control piece in another example. (A) is a side view showing a normal energized state in another example. (B) is a side view showing a standing urging state in another example. The partially expanded perspective view which shows the standing-up biasing state in another example. The partially expanded perspective view which shows the standing-up biasing state in another example.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, the vehicle wiper device includes a drive device K including a motor 1 as a drive source and a link mechanism 2 and a wiper arm biasing member F. In the vehicle wiper device according to the present embodiment, the driving device K and the wiper arm biasing member F are respectively provided at both ends in the vehicle width direction below the front window 3 as the wiping surface, and are connected to them. The wipers 4 (the front end side) are arranged so as to overlap each other in the wiping direction (direction parallel to the wiping surface) at the stop position (the lowest end position). That is, in the vehicle wiper device of the present embodiment, the wiper 4 on the driver's seat side (left side in FIG. 1) and the wiper 4 on the passenger seat side (right side in FIG. 1) are approximately the center in the vehicle width direction. The wiping range F1 of the wiper 4 on the driver seat side (left side in FIG. 1) and the wiping range F2 of the wiper 4 on the passenger seat side (right side in FIG. 1) are arranged symmetrically. ing. The wiper 4 includes a wiper arm 31 whose base end is connected to the wiper arm urging member F, and a wiper blade that is connected to the distal end portion of the wiper arm 31 and wipes the front window 3.

  The drive device K is a device in which the rotational force of the motor 1 is transmitted to the link mechanism 2 to reciprocally rotate its output shaft. The drive device K has a base end (lower end) coupled to the output shaft of the link mechanism 2. The shaft portion 11 (see FIGS. 2 and 3) is reciprocally rotated within a range of about 90 °, for example. In addition, the drive shaft part 11 of this embodiment is inserted in the cylindrical pivot holder 12 with which the intermediate part was provided in the drive device K, and is supported so that rotation is possible. Further, the pivot holder 12 is formed integrally with a link case (not shown) that houses the link mechanism 2 and is fixed to the vehicle body by fixing of the driving device K.

  As shown in FIGS. 2 and 3, the wiper arm biasing member F includes a swing base member 21 fixed to the drive shaft portion 11 and a swing member main body 22 fixed to the swing base member 21. It has a rocking member 23 provided. Further, the wiper arm urging member F swings with a tilting member 24 supported on the swinging member main body 22 so as to be tiltable about the tilting axis B1 in a torsional position with respect to the rotation axis A1 of the drive shaft portion 11. One end is supported by the member main body 22, and a compression coil spring 25 is provided as a compression spring that applies a biasing force to the tilting member 24.

  More specifically, the rocking base member 21 of the rocking member 23 has a plate shape and is formed in a rectangle whose sides are slightly larger than the outer diameter of the pivot holder 12 when viewed from the axial direction of the drive shaft portion 11. The drive shaft 11 is fixed to the front end (upper end) of the drive shaft 11 protruding outside the pivot holder 12 so as to be rotatable together with the drive shaft 11.

  As shown in FIG. 2, the swing member main body 22 of the swing member 23 has a pair of parallel plate-like arm portions 22a and an arm connecting portion 22b that connects the tip portions of the plate-like arm portions 22a. The base-side fixing portions 22c of the pair of plate-like arm portions 22a can be integrally rotated with the swing base member 21 so as to sandwich both side portions of the swing base member 21 that slightly protrudes (protrudes) from the pivot holder 12. It is fixed.

  The plate-like arm portion 22a extends from the base end side fixing portion 22c in the radial direction (orthogonal direction) of the rotation axis A1 of the drive shaft portion 11, and extends downward from the distal end of the extension portion 22d and downward. And an inclined extending portion 22e extending away from the rotation axis A1 as it goes. Further, a tilting pin insertion hole 22f (see FIG. 3) is formed at the tip of the outer extension 22d (a position corresponding to the tilting axis B1) in the plate-like arm 22a.

  The arm connecting portion 22b is formed in a plate shape whose both ends are connected to the tip end portion of the plate-like arm portion 22a (inclined extending portion 22e), and the central portion thereof is for supporting one end of the compression coil spring 25. A rotation support member 26 is rotatably provided. Specifically, a housing hole 22g (see FIG. 2) penetrating in the thickness direction (substantially up and down direction) is formed in the central portion of the arm connecting portion 22b. The arm connecting portion 22b is formed with a pin insertion hole 22h penetrating in the direction of the parallel axis B2 (see FIG. 3) parallel to the tilt axis B1. The rotation support member 26 is substantially accommodated in the accommodation hole 22g, and is inserted into the insertion hole (not shown) that is aligned with the pin insertion hole 22h, and is inserted into the pin insertion hole 22h. Is inserted so as to be rotatable about the parallel axis B2. The rotation support member 26 is formed in a substantially plate shape, and a circular bulging portion 26a (see FIG. 3) that bulges in a circular shape when viewed from the plane orthogonal direction is formed in the center of one plane (upper surface). ing. The outer diameter of the circular bulging portion 26 a is set slightly smaller than the inner diameter of the compression coil spring 25.

  The tilting member 24 includes a tilting center portion 24b in which a tilting center hole 24a (see FIG. 3) is formed at a position corresponding to the tilting axis B1, and an upper side from the tilting center portion 24b, more specifically, to the tilting center portion 24b. On the other hand, an upper extension 24c extending in a direction in which a wiper arm 31 fixed to a wiper fixing shaft 32 described later extends, and downward from the tilt center 24b, more specifically, with respect to the tilt center 24b. And a downwardly extending portion 24d as an extending portion extending to the opposite side to the direction in which the wiper arm 31 extends. A cylindrical large collar 28a and a small collar 28b are inserted into the tilt center hole 24a, and a pin 29 inserted through the tilt pin insertion hole 22f of the rocking member body 22 is inserted into the small collar 28b. The Thus, the tilting member 24 is supported by the swinging member main body 22 so as to be tiltable about the tilting axis B1 (center of the pin 29).

  A wiper fixing shaft 32 as a wiper fixing portion for fixing the wiper arm 31 of the wiper 4 is fixed to the tip (upper end) of the upper extension 24c. Further, a biased connection hole 24e as a biased portion to which a biasing force from the compression coil spring 25 is applied is provided at the distal end (lower end) of the downward extending portion 24d. The parallel axis B3 is parallel to the tilt axis B1. It is formed so as to penetrate in the direction.

  The tilting member 24 is provided with a biased rotating member 33 for receiving a biasing force from the other end of the compression coil spring 25 so as to be rotatable about the parallel axis B3. Specifically, as shown in FIG. 2, a slit 24f cut upward is formed at the tip (lower end) of the lower extension 24d so as to divide the biased connection hole 24e. The biased rotation member 33 is plate-shaped, and has a large base end portion 33a formed so that the width thereof is substantially the same as the outer diameter of the compression coil spring 25 so that the other end of the compression coil spring 25 is directly brought into contact therewith. An inner fitting portion 33b extending from the large base end portion 33a with a width slightly smaller than the inner diameter of the compression coil spring 25, and a small width extending portion 33c extending further from the inner fitting portion 33b. Have. A slit 33d extending toward the proximal end is formed at the distal end of the small width extending portion 33c. The biased rotating member 33 has a large base end portion 33a disposed in the slit 24f (see FIG. 2) of the downward extending portion 24d, and a pin 34 inserted through the biased connecting hole 24e. By being inserted through its own hole (not shown), the tilting member 24 is supported so as to be rotatable about the parallel axis B3. At this time, the tip of the small-width extending portion 33c is assembled so as to pass through a hole (not shown) formed in the rotation support member 26 and the pin 27 is disposed in the slit 33d. At this time, the compression coil spring 25 is disposed in a compressed state between the rotation support member 26 and the large base end portion 33 a of the biased rotation member 33. At this time, the compression coil spring 25 is externally fitted (with a slight gap) to the circular bulging portion 26a and the internal fitting portion 33b.

  Thereby, one end of the compression coil spring 25 is supported by the rotation support member 26 of the swing member 23 (the swing member main body 22), and the large base end portion 33a of the biased rotation member 33 and the biased connection are provided. An urging force is applied to the tilting member 24 through the hole 24e. The biasing direction of the compression coil spring 25 is a normal biasing state in which the wiper arm 31 (wiper 4) is biased toward the wiping surface (the front window 3) according to the tilting angle of the tilting member 24 with respect to the swinging member 23 ( 3 (a)) and an erection biasing state (see FIG. 3 (b)) in which the wiper arm 31 is biased to the erection side. Specifically, first, the wiper arm 31 is configured so that each member (swing member 23, tilting member) of the wiper arm biasing member F is centered on the wiper fixing shaft 32 in the normal biasing state (see FIG. 3A). 24 and the compression coil spring 25) are fixed to the wiper fixing shaft 32 at the base end so as to extend on the opposite side. As shown in FIG. 3A, the urging force Fa from the parallel axis B2 on the support end side of the compression coil spring 25 toward the parallel axis B3 causes the parallel axis B2 and the tilting axis B1 to move. In a state of going outward from the passing straight line L, the tilting member 24 is urged in a direction in which the wiper arm 31 is urged toward the wiping surface (clockwise direction in FIG. 3A). Further, as shown in FIG. 3B, an urging force Fb from the parallel axis B2 on the support end side of the compression coil spring 25 toward the parallel axis B3 causes the parallel axis B2 and the tilting axis B1 to move. In a state inward from the straight line L that passes, the tilting member 24 is urged in a direction in which the wiper arm 31 is urged to the upright side (counterclockwise direction in FIG. 3B).

  Here, as shown in FIG. 3 (b), the tilting member 24 itself (the tilting portion) has a tilting angle set in advance in the standing biased state in which the compression coil spring 25 biases the wiper arm 31 to the standing side. A regulating piece 24g for regulating the further tilting of 24) is formed. As shown in FIG. 4, the restricting piece 24 g of this embodiment abuts against the lower surface of the corner portion of the swing base member 21 that slightly protrudes (protrudes) from the pivot holder 12 to restrict further tilting. It is possible to project from the tilting center portion 24b. A pair of restricting pieces 24g correspond to the two corner portions of the swing base member 21 and are provided in a pair in the axial direction of the tilt axis B1. Further, the pair of restricting pieces 24g are formed in an arc shape along the pivot holder 12 (so as to avoid the pivot holder 12) so as to contact the lower surface of the swing base member 21 as much as possible. Has been. In addition, as shown in FIG. 3B, the restricting piece 24g of the present embodiment tilts the tilting member 24 at an angle at which the wiper fixing shaft 32 tilts about 45 ° with respect to the rotation axis A1 of the drive shaft portion 11. Is set to regulate.

  Here, the vehicle wiper device of the present embodiment is also in the upright biased state (FIG. 3B) even in the normal biased state (see FIG. 3A) when viewed from the axial direction of the tilting axis B1. ))), Straight lines passing through the center of each end of the compression coil spring 25 (straight lines along the urging forces Fa and Fb) form an angle of 45 ° or less with the rotation axis A1 of the drive shaft 11. Is set to

  Further, in the tilting member 24, a louver when rotated around the drive shaft portion 11 is provided in an intermediate portion 24h between the tilt center portion 24b and the wiper fixing shaft 32 (the tip portion of the upper extension portion 24c). An escape portion 24i is formed to prevent interference with the motor 41 (the rotation trajectory range is reduced as viewed from the axial direction of the drive shaft portion 11).

  Specifically, the intermediate portion 24h of the present embodiment is formed to have a substantially square cross section when viewed from the axial direction of the drive shaft portion 11, and the escape portion 24i is formed around the intermediate portion 24h (centering on the rotation axis A1). The directional end portion is thin in the radial direction, so that it is formed at the circumferential end portion on the radially outer surface of the intermediate portion 24h. Further, the relief portion 24i of the present embodiment is formed by making the radially outer surface of the intermediate portion 24h as an arc surface centered on the drive shaft portion 11 side when viewed from the axial direction of the drive shaft portion 11. . In FIG. 5, a cross section of the intermediate portion 24 h at a position corresponding to the escape portion 24 i in the standing urging state (see FIG. 3B) is indicated by a two-dot chain line.

  As shown in FIGS. 3 and 5, the vehicular wiper apparatus has a substantially circular shape in which the intermediate portion 24h is formed in the louver 41 so that most of the mechanism is disposed inside the louver 41 of the vehicle. The leading end side (the wiper fixing shaft 32 and the like) is disposed outside the intermediate portion 24h through the lead-out hole 41a. In the present embodiment, as shown in FIG. 6, the rotation axis A1 of the drive shaft portion 11 is the rotation locus of the intermediate portion 24h with respect to the shaft center A2 of the lead-out hole 41a. Are arranged so as to deviate from the edge of the outlet hole 41a. In FIG. 6, the cross-section of the intermediate portion 24h at a position corresponding to the escape portion 24i in the standing urging state (see FIG. 3B) and the rotation trajectory range for making it easy to understand visually. The cross section of the intermediate part 24h at each point (three places) including the upper end inversion position during movement is illustrated by a two-dot chain line. Specifically, the rotation axis A1 is arranged so as to be shifted from the axis center A2 so that the intermediate point of the rotation locus range of the intermediate portion 24h approaches the axis center A2 side of the lead-out hole 41a.

Next, the operation of the vehicle wiper device configured as described above will be described.
For example, when the motor 1 is driven, the wiper arm urging member F and the wiper 4 (wiper arm 31) together with the drive shaft portion 11 are reciprocally rotated integrally within a rotation angle range of about 90 °, and a wiping operation is performed. .

  At this time, as shown in FIG. 3A, the urging force Fa from the parallel axis B2 on the support end portion side of the compression coil spring 25 toward the parallel axis B3 is applied to the parallel axis B2 and the tilt axis. In a state of going outward from the straight line L passing through B1, the tilting member 24 is urged in a direction in which the wiper arm 31 is urged toward the wiping surface (clockwise direction in FIG. 3A). Therefore, even when the wiper 4 (wiper arm 31) is reciprocally rotated within the rotation angle range of about 90 ° as described above, even if the wiper 4 moves up and down slightly following the wiping surface shape, the wiper 4 remains on the wiping surface. The wiping operation is performed satisfactorily by pressing properly.

  For example, when an operator or the like lifts the wiper 4 (wiper arm 31) while the motor 1 is stopped, the urging force Fb of the compression coil spring 25 is less than the straight line L as shown in FIG. The tilting member 24 is urged in a direction in which the wiper arm 31 is urged to the standing side (counterclockwise direction in FIG. 3B). Then, as shown in FIGS. 3B and 4, the regulating piece 24g abuts on the rocking base member 21 of the rocking member 23 to restrict further tilting, so that the tilting angle is adjusted. The standing state of the wiper 4 (wiper arm 31) is maintained.

Next, the characteristic effects of the above embodiment will be described below.
(1) Since the pivoting support member 26 that supports one end of the compression coil spring 25 is rotatably provided on the swing member 23, the compression coil is changed when the tilt angles of the wiper arm 31 and the tilting member 24 are changed. An angular deviation of the surface supporting one end of the spring 25 with respect to the orthogonal direction of the urging direction (the urging forces Fa and Fb) of the compression coil spring 25 can be reduced. Therefore, the loss of the urging forces Fa and Fb by the compression coil spring 25 can be reduced. As a result, for example, even if the wire rod of the compression coil spring 25 is thinned or the diameter of the compression coil spring 25 is reduced, the necessary urging force can be easily ensured.

  (2) Since the tilting member 24 is provided with a biased rotating member 33 for receiving the biasing forces Fa and Fb from the other end of the compression coil spring 25 so as to be rotatable, the wiper arm 31 and the tilting member 24 When the tilt angle changes, the angle deviation of the surface that receives the urging forces Fa and Fb from the other end of the compression coil spring 25 with respect to the direction perpendicular to the urging direction of the compression coil spring 25 can be reduced. Therefore, the loss of the urging force by the compression coil spring 25 can be further reduced.

  (3) When viewed from the axial direction of the tilting axis B1, straight lines (straight lines along the urging forces Fa and Fb) passing through the center of each end of the compression coil spring 25 are 45 ° with the rotation axis A1 of the driving shaft 11. Therefore, the arrangement space in the radial direction of the rotation axis A1 of the drive shaft portion 11 can be reduced. That is, when the wiper arm urging member F rotates together with the drive shaft portion 11, an occupied space for rotating the wiper arm urging member F is required around the rotation axis A1, but the radial arrangement space is small. Thus, the occupied space can be reduced.

  (4) Either the normal biasing state in which the compression coil spring 25 biases the wiper arm 31 toward the wiping surface or the standing biasing state in which the wiper arm 31 is biased to the standing side according to the tilting angle of the tilting member 24. Therefore, the wiper arm urging member F can be integrated with a so-called lockback function. And if it does in this way, the tilt angle of the wiper arm 31 and the tilt member 24 will change a lot, but the rotation support member 26 is provided, and the surface which supports the end of the compression coil spring 25 in each state is compression coil spring 25, the effect of reducing the loss of the urging forces Fa and Fb by the compression coil spring 25 is increased.

  (5) Since the tilting member 24 is supported by the swinging member 23, a member for urging the wiper arm 31 (wiper arm urging member F) is not separated into both end sides of the drive shaft portion 11. Will be consolidated on the side. As a result, the wiper arm 31 can be urged simply by interposing the wiper arm urging member F between the drive shaft portion 11 and the wiper arm 31. For example, the mountability to a vehicle is improved.

  (6) The intermediate portion 24h between the tilting central portion 24b of the tilting member 24 and the wiper fixing shaft 32 is prevented from interfering with the louver 41 when rotated around the drive shaft portion 11 (the drive shaft portion 11 Since the escape portion 24i for reducing the rotation trajectory range as viewed from the axial direction is formed, the lead-out hole 41a provided in the louver 41 can be reduced.

  (7) The intermediate portion 24h of the tilting member 24 is formed to have a substantially square cross section when viewed from the axial direction of the drive shaft portion 11, and the clearance portion 24i is formed such that the circumferential end of the intermediate portion 24h is thin in the radial direction. As a result, the intermediate portion 24h is formed at the end portion in the circumferential direction on the radially outer side surface, so that interference with the edge of the lead-out hole 41a provided in the louver 41 is prevented while keeping the rigidity of the intermediate portion 24h high. (Moving trajectory range can be reduced).

  (8) Since the escape portion 24i is formed by the radially outer surface of the intermediate portion 24h being an arc surface having a center on the drive shaft portion 11 side when viewed from the axial direction of the drive shaft portion 11, Interference with the edge of the lead-out hole 41a can be prevented (the rotation trajectory range is reduced) while keeping the rigidity of the portion 24h the highest.

  (9) The rotation axis A1 of the drive shaft portion 11 is shifted with respect to the axis center A2 of the outlet hole 41a of the louver 41 in a direction in which the rotation locus is separated from the edge of the outlet hole 41a in the rotation range. Therefore, the lead-out hole 41a can be made small, and the intermediate portion 24h can be prevented from colliding with the edge of the lead-out hole 41a.

  (10) Since the regulating member 24g that restricts further tilting of the tilting member 24 at a preset tilting angle in the standing urging state is formed on the tilting member 24, the maximum of the tilting member 24 is formed by the regulating piece 24g. The tilt angle, and thus the standing angle of the wiper arm 31, is determined. Therefore, it is not necessary to provide the wiper arm 31 with a mechanism or shape for determining the standing angle, and the degree of freedom of the shape of the wiper arm 31 is increased and simplification can be achieved.

(11) Since the pair of regulating pieces 24g are provided in the axial direction of the tilting axis B1, for example, the tilting of the tilting member 24 can be regulated firmly with a good balance.
(12) Each member (the swing member 23, the tilting member 24, and the compression coil spring 25) constituting the wiper arm urging member F is disposed on the opposite side of the extending side of the wiper arm 31 fixed to the wiper fixing shaft 32. Therefore, each member rotates on the opposite side of the wiper arm 31, that is, on the bonnet side opposite to the front window 3. Therefore, an arrangement space can be easily secured and the arrangement can be easily performed.

  (13) Each member except the wiper fixing shaft 32 constituting the wiper arm urging member F is disposed below the wiper fixing shaft 32. Therefore, it can be easily arranged on the inner side of the outlet hole 41a provided in the louver 41 to improve the appearance.

The above embodiment may be modified as follows.
In the above embodiment, the restricting piece 24g may be changed in position, shape, or the like as long as it can restrict further tilting of the tilting member 24 at a tilting angle set in advance in the standing and biasing state.

  For example, you may change as shown to Fig.7 (a), (b). The restriction piece 51 of this example is integrally formed with the swing member main body 22 of the swing member 23. The restricting piece 51 is formed at the end of the pivot member 12 side (the rotation axis A1 side) in the swing member main body 22 (the inclined extending portion 22e), and the pivot holder in the lower extending portion 24d of the tilting member 24 is formed. It abuts against the end surface on the 12 side and restricts further tilting of the tilting member 24 at that position. In addition, the restricting piece 51 is bent to the side closer to the pivot holder 12 side end portion of the pair of inclined extending portions 22e and protrudes along the axial direction of the tilting shaft B1 (inward in the width direction). The entire end surface in the short direction is formed as a regulating surface 51a that abuts against the tilting member 24 and regulates tilting when viewed from the axial direction of B1.

  In this way, when the regulation piece 51 is formed to be curved as viewed from the axial direction of the tilting axis B1, it can be made difficult to be deformed as compared with, for example, a linearly formed one, and receives the force from the tilting member 24. However, the restriction piece 51 can be made difficult to fall down. Therefore, the standing angle of the wiper arm 31 can be stably maintained.

  Further, the regulating piece 51 abuts on the tilting member 24 at the lower extending portion 24d extending from the tilting central portion 24b to regulate further tilting, and regulates the rotation at a position far from the tilting central portion 24b. Therefore, it is difficult for a large force to be applied to the restricting piece 51, and the restricting piece 51 can be made difficult to deform. Also by this, the standing angle of the wiper arm 31 can be stably maintained.

  Further, for example, the change may be made as shown in FIGS. The restricting piece 52 in this example is integrally formed with the swing member main body 22 of the swing member 23. The restricting piece 52 is formed at the pivot holder 12 side (the rotation axis A1 side) end of the swing member main body 22 (the inclined extending portion 22e), and the pivot holder in the lower extending portion 24d of the tilting member 24 is provided. It abuts on the engagement convex portion 24j formed on the 12th side and restricts further tilting of the tilting member 24 at that position. In addition, the restricting piece 52 is bent to the side closer to the pivot holder 12 side ends of the pair of inclined extending portions 22e and protrudes along the axial direction of the tilting shaft B1 (inward in the width direction), and the tilting shaft The end surface in the longitudinal direction is formed as a regulation surface 52a that regulates tilting by abutting against the tilting member 24 (engagement convex portion 24j).

  As described above, when the end face in the longitudinal direction of the restricting piece 52 is the restricting face 52a, for example, even when receiving a force from the tilting member 24 as compared with the end face in the short direction as the restricting face (see FIG. 7). The restriction piece 52 can be further prevented from falling down. Therefore, the standing angle of the wiper arm 31 can be maintained more stably. Further, the restricting pieces 51 and 52 are not brought into contact with the non-moving-side structure such as the pivot holder 12, but the restricting pieces 51 and 52 and the tilting member 24 with which the restricting pieces 51 and 52 are in contact are both driven shaft portions. Since it is configured on the side of the wiper arm urging member F that rotates around 11, even if it is rotated in the lockback state, the occurrence of abnormal noise is prevented without sliding.

  In the above-described embodiment and another example, a pair of regulating pieces 24g, 51, 52 are provided along the axial direction of the tilt axis B1, but the present invention is not limited to this, and only one may be provided. Further, for example, the pair of regulating pieces 51 (52) may be connected to form one.

-The rotation support member 26 of the said embodiment is good also as what was provided in the other aspect, if the one end of the compression coil spring 25 is supported and provided in the rocking | swiveling member so that rotation is possible.
For example, you may change as shown to Fig.9 (a), (b). The swing member main body 61 in the swing member 23 of this example is composed of a pair of parallel plate-like arm portions 61a (only one on the front side in the drawing is shown in the figure), and is rotated around each tip portion (lower end portion). The base ends of the pair of arm portions 62a of the moving support member 62 are rotatably connected, and the compression coil spring 25 is supported by the bottom portion 62b that connects the distal ends (lower ends) of the pair of arm portions 62a. In FIG. 9, the compression coil spring 25 is schematically illustrated. Even if it does in this way, the effect similar to the effect of the said embodiment can be acquired.

-The escape part 24i of the said embodiment may be changed into the escape part of another shape for making a rotation locus | trajectory range small.
For example, it may be changed as shown in FIG. In this example, the convex portion 71 is formed in the central portion in the circumferential direction of the radially outer surface of the intermediate portion 24h, so that the circumferential end portion on the radially outer surface of the intermediate portion 24h is the escape portion 72. In FIG. 7, a cross section of the intermediate portion 24 h at a position corresponding to the escape portion 72 in the upright biasing state is illustrated by a two-dot chain line. Even in this case, it is possible to prevent interference with the lead-out hole 41a of the louver 41 (make the rotation trajectory range small) while keeping the rigidity of the intermediate portion 24h high.

  For example, as shown in FIG. 11, you may change. In this example, the escape portion 73 is formed such that the circumferential width of the intermediate portion 74 is locally narrow between the tilt center portion 24b and the wiper fixing shaft 32 (the tip of the upper extension portion 24c). 74 is formed at the circumferential end. In FIG. 8, a cross section of the intermediate portion 74 at a position corresponding to the escape portion 73 in the upright biased state is shown by a two-dot chain line. In this way, interference with the louver 41 at a position corresponding to the lead-out hole 41a is ensured while securing the circumferential width of the portion other than the escape portion 73 (the tip side of the tilting central portion 24b and the upper extension portion 24c). This can be prevented (the rotation trajectory range is reduced).

  In the embodiment described above, straight lines (straight lines along the biasing forces Fa and Fb) passing through the center of each end of the compression coil spring 25 when viewed from the axial direction of the tilting axis B1 are the rotation axes A1 of the drive shaft unit 11. However, the present invention is not limited to this, and the angle may be set to 45 ° or more.

  In the above embodiment, the tilting member 24 is supported by the swinging member 23. However, the present invention is not limited to this. For example, the swinging member 23 is provided on the lower end side of the drive shaft portion 11 and driven. You may change to the structure by which the tilting member 24 is supported by the upper end side of the axial part 11 so that rotation is possible.

  In the above embodiment, either the state in which the urging direction of the compression coil spring 25 urges the wiper arm 31 toward the wiping surface or the state in which the wiper arm 31 is urged toward the standing side according to the tilt angle of the tilt member 24. However, the present invention is not limited to this. For example, the compression coil spring (biasing member) may simply bias the wiper arm 31 toward the wiping surface.

In the above embodiment, the escape portion 24i is formed in the intermediate portion 24h of the tilting member 24. However, the present invention is not limited to this, and the shape may be changed so that the escape portion 24i is not formed.
In the above embodiment, the rotation axis A1 of the drive shaft portion 11 is arranged so as to be shifted with respect to the axis center A2 of the lead-out hole 41a of the louver 41. However, the present invention is not limited to this, and the rotation axis A1. May be arranged so as to coincide with the axial center A2.

  In the above embodiment, the regulating piece 24g is formed on the tilting member 24. However, the present invention is not limited to this. For example, a mechanism (regulating section) for determining the standing angle of the wiper arm 31 at another part such as the wiper arm 31 is used. ) May be provided.

  In the above-described embodiment, each member (the swing member 23, the tilting member 24, and the compression coil spring 25) constituting the wiper arm urging member F is on the opposite side of the extending side of the wiper arm 31 fixed to the wiper fixing shaft 32. However, the present invention is not limited to this, and at least one member may be arranged on the side where the wiper arm 31 extends.

  In the above embodiment, each member except the wiper fixing shaft 32 constituting the wiper arm biasing member F is disposed below the wiper fixing shaft 32. However, the present invention is not limited to this, and at least a part of the members is wiped. It is good also as a structure arrange | positioned in the same height as the fixed shaft 32, or a position higher than the wiper fixed shaft 32.

  In the above embodiment, the rotational axis A1 of the drive shaft 11 and the tilting axis B1 of the tilting member 24 are in a torsional positional relationship. However, the present invention is not limited to this, and the orthogonal (crossing) positional relationship. The configuration may be changed.

In the above-described embodiment, the compression coil spring 25 is used as the compression spring, but other compression springs may be used, such as compression using a bamboo spring spring obtained by winding a plate-like spring wire in a bamboo child shape.
In the above embodiment, the base end portion (lower end portion) of the drive shaft portion 11 is connected to the output shaft of the link mechanism 2, but the drive shaft portion 11 itself may be used as the output shaft of the link mechanism 2.

  In the above embodiment, the drive device K is provided on each side in the vehicle width direction below the front window 3, and the wipers 4 are arranged to overlap each other in the wiping direction at the stop position. However, the present invention is not limited to this, and other types of vehicle wiper devices may be used. For example, the present invention may be applied to a so-called tandem type vehicle wiper device in which one wiper 4 and the other wiper 4 reciprocate in the same direction to wipe the front window 3.

  In the above embodiment, the pivot holder 12 is formed integrally with a link case (not shown) that houses the link mechanism 2 and is fixed to the vehicle body by fixing the driving device K. It may be formed on the body and fixed to the vehicle body separately from the driving device K.

  DESCRIPTION OF SYMBOLS 11 ... Drive shaft part, 23 ... Swing member, 24 ... Tilt member, 25 ... Compression coil spring (compression spring), 26, 62 ... Rotation support member, 31 ... Wiper arm, 32 ... Wiper fixed axis (wiper fixed part) , 33... Biased rotating member, F. Wiper arm urging member, K... Driving device, A1... Rotating shaft, B1 .. tilting shaft, Fa, Fb.

Claims (5)

A swing member provided so as to be integrally rotatable with a drive shaft that is reciprocally rotated by a drive device;
A tilting member that is supported so as to be tiltable at the center of the tilting shaft that intersects or twists with the rotational axis of the drive shaft, and is provided with a wiper fixing portion for fixing the wiper arm;
A wiper device for a vehicle comprising a wiper arm biasing member having one end supported by the swing member and a compression spring that imparts a biasing force to the tilting member,
The wiper device for a vehicle according to claim 1, wherein the swinging member is rotatably provided with a rotation support member that supports one end of the compression spring. The vehicle wiper device according to claim 1,
The wiper device for a vehicle according to claim 1, wherein a biased rotation member for receiving a biasing force from the other end of the compression spring is rotatably provided on the tilting member. The vehicle wiper device according to claim 1 or 2,
The vehicle is characterized in that a straight line passing through the center of each end of the compression spring as viewed from the axial direction of the tilting shaft is set to form an angle of 45 ° or less with the rotation shaft of the drive shaft portion. Wiper device. The vehicle wiper device according to any one of claims 1 to 3,
The wiper arm urging member urges the wiper arm toward the wiping surface when the urging direction of the compression spring urges the wiper arm toward the wiping surface according to a tilt angle of the tilt member with respect to the swinging member. A vehicle wiper device configured to be switched to one of a state and a state. The vehicle wiper device according to any one of claims 1 to 4,
The vehicle wiper device, wherein the tilting member is supported by the swinging member so as to be tiltable.