JP2018111488A - Vehicle wiper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle wiper device whose wiping range can be enlarged preferably.SOLUTION: A vehicle wiper device 2 comprises: a first driving lever 26 supported with a first shaft line L1 as a center; a second driving lever 29 supported with a second shaft line L2 as a center; a first driven lever 32 connected with a third shaft line L3 of the first driving lever 26 as a center; an arm head 33 connected with a fourth shaft line L4 of the first driven lever 32 as a center, and connected with a fifth shaft line L5 of the second driving lever 29 as a center; a first wiper arm 35 which moves together with the arm head 33 and a first wiper blade 36 is connected to; a transmitting mechanism for oscillation which includes a crank arm 12 for oscillation fixed to a rotation shaft 11a of a singular motor 11 and transmits driving force to the first driving lever 26; and a transmitting mechanism for extension which includes a crank arm 13 for extension fixed to the rotation shaft 11a and transmits driving force to the second driving lever 29.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle wiper device.

  As a vehicle wiper device installed in a vehicle such as an automobile, the wiper arm and wiper blade are rotated around one point, and a four-bar linkage mechanism is provided to simplify the wiping range of the front window (wiping surface). There are some which have a desired range (a range that is substantially enlarged) different from a fan-shaped sector (see, for example, Patent Document 1).

  In such a vehicle wiper device, when a main lever supported rotatably with respect to the vehicle body on the lower end side of the front window is reciprocally rotated by the driving force of the driving source, the arm head is driven by the driving force of the main lever. It is possible to wipe away a portion closer to the upper corner of the front window than a simple fan shape by rotating the other lever including.

Japanese Patent Laid-Open No. 11-227572

As described above, various types of vehicle wiper devices that substantially expand the wiping range have been proposed. However, a new vehicle wiper device is required to improve vehicle mountability and the like.
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 favorably expand the wiping range.

  A vehicle wiper device that solves the above-described problems includes a first drive lever having a base end supported so as to be rotatable about a first axis located at a fixed position with respect to the vehicle body, and a fixed position with respect to the vehicle body. A second drive lever whose base end is supported so as to be rotatable about a second axis, and a base end side which is rotatable about a third axis on the distal end side of the first drive lever. The first driven lever is connected to the base end side so as to be rotatable about the fourth axis on the tip side of the first driven lever, and the fifth axis on the tip side of the second drive lever is centered. And a first wiper blade which is provided so as to operate integrally with the second driven lever, and is reciprocally wiped between the upside down positions of the wiping surface. A first wiper arm connected to the unit, A swing transmission mechanism that includes a swing crank arm that is fixed so as to rotate integrally with the rotation shaft of the drive source, and a swing transmission mechanism that transmits a driving force to the first drive lever, and is fixed so as to rotate integrally with the rotation shaft of the drive source. And a telescopic transmission mechanism that transmits a driving force to the second drive lever.

  According to this configuration, when a single drive source is driven, the driving force is transmitted to the first drive lever via the swing transmission mechanism including the swing crank arm and the telescopic transmission including the extendable crank arm. It is transmitted to the second drive lever through the mechanism. Then, when the swing operation of the first wiper arm is performed by the rotation of the first drive lever, that is, the wiping operation by the first wiper blade is performed, the second drive lever is turned on the first drive lever on the tip side of the second drive lever. By moving the five axes (the base end side of the first wiper arm), the wiping range by the first wiper blade can be expanded.

  In the above vehicle wiper device, the swing transmission mechanism includes a swing crank arm in a first angle range that does not include a dead point where the rotating shaft cannot be rotated even when an external force is applied to the first drive lever. Is rotated forward and backward, and the expansion / contraction transmission mechanism has the expansion / contraction crank in a second angle range including a dead point at an intermediate point where the rotation shaft cannot be rotated even if an external force is applied to the second drive lever. It is preferable that the arm is set to rotate forward and backward.

  According to this configuration, in the swing transmission mechanism, the swing crank arm is rotated forward and backward in a first angle range that does not include a dead point where the rotation shaft cannot be rotated even if an external force is applied to the first drive lever. Therefore, when the rotating shaft rotates one reciprocating forward and backward, the first drive lever also swings one reciprocating and the wiping operation by the first wiper blade reciprocates once. Further, in the extension / contraction transmission mechanism, the extension / contraction crank arm rotates forward and backward within a second angle range including a dead point at an intermediate point where the rotation shaft cannot be rotated even if an external force is applied to the second drive lever. When the rotary shaft rotates one reciprocating forward and reverse, the second drive lever swings two reciprocally. That is, for example, at the midpoint of the first wiper blade upside down position, the fifth axis on the tip side of the second drive lever is moved to the upper side of the wiping surface, and the first wiper blade is in the upside down position. Thus, the fifth axis on the distal end side of the second drive lever can be moved to the lower side of the wiping surface, and the portion near the upper corner on the wiping surface can be wiped. Therefore, specifically, the wiping range by the first wiper blade can be expanded.

  In the vehicle wiper device, the swing transmission mechanism includes a swing rod that directly connects the swing crank arm and the first drive lever, and the telescopic transmission mechanism includes the telescopic crank. It is preferable to include a telescopic rod that directly connects the arm and the second drive lever.

  According to this configuration, since the swing transmission mechanism includes the swing rod that directly connects the swing crank arm and the first drive lever, the swing crank arm and the first drive lever are connected without waste. The In addition, since the expansion / contraction transmission mechanism includes an expansion / contraction rod that directly connects the expansion / contraction crank arm and the second drive lever, the expansion / contraction crank arm and the second drive lever are connected without waste. Therefore, for example, the number of parts (the number of links (nodes)) does not increase as compared with a vehicle wiper device connected so as to change motion in a complicated manner.

  In the vehicle wiper device, the swing rod includes a first connecting rod that connects the swing crank arm and a second wiper arm lever connected to the second wiper arm, the second wiper arm lever, It is preferable that it is a 2nd connection rod which connects a 1st drive lever.

  According to this configuration, the swing rod includes the first connecting rod that connects the swing crank arm and the second wiper arm lever connected to the second wiper arm, and the second wiper arm lever and the first drive lever. Since it is the second connecting rod to be connected, although there are two rocking rods, it is also used for driving the second wiper arm, and no waste occurs.

In the vehicle wiper device, it is preferable that a base end portion of a second wiper arm is connected to the rotation shaft of the drive source so as to be integrally rotatable.
According to this configuration, since the base end portion of the second wiper arm is connected to the rotation shaft of the drive source so as to be integrally rotatable, the second wiper arm is also driven without particularly increasing other levers or rods. can do.

  In the vehicle wiper device, at least a part of the transmission mechanism for swing is at least partly in a state of driving, and the first drive lever and the second are viewed from the axial direction of the first axis. It is preferably set so as to pass inside a portion surrounded by the drive lever, the first driven lever, and the second driven lever.

  According to this configuration, at least a part of the oscillation transmission mechanism is in at least a part of the driving mechanism when viewed from the axial direction of the first axis, and the first drive lever, the second drive lever, and the first driven Since it is set so as to pass through the inside of the portion surrounded by the lever and the second driven lever, the mounting space can be reduced as compared with the one that does not pass through the inside.

  In the vehicle wiper device, at least a part of the transmission mechanism for expansion and contraction is in a state of at least a part when driven, and when viewed from the axial direction of the first axis, the first drive lever and the second It is preferably set so as to pass inside a portion surrounded by the drive lever, the first driven lever, and the second driven lever.

  According to this configuration, at least a part of the expansion / contraction transmission mechanism is in at least a part of the driving mechanism when viewed from the axial direction of the first axis, and the first drive lever, the second drive lever, and the first driven Since it is set so as to pass through the inside of the portion surrounded by the lever and the second driven lever, the mounting space can be reduced as compared with the one that does not pass through the inside.

  According to the vehicle wiper device of the present invention, the wiping range can be expanded well.

The partial schematic diagram of the vehicle provided with the vehicle wiper apparatus in one Embodiment. The top view of the vehicle wiper apparatus in one Embodiment. The top view for demonstrating operation | movement of the vehicle wiper apparatus in one Embodiment. The top view for demonstrating operation | movement of the vehicle wiper apparatus in one Embodiment. The top view for demonstrating operation | movement of the vehicle wiper apparatus in one Embodiment. The top view for demonstrating operation | movement of the vehicle wiper apparatus in one Embodiment. The top view of the vehicle wiper apparatus in another example. The partial schematic diagram of the vehicle provided with the vehicle wiper apparatus in another example.

Hereinafter, an embodiment of a vehicle including a vehicle wiper device will be described with reference to FIGS.
As shown in FIG. 1, a vehicle wiper device 2 is disposed below a front window 1 (in the ground direction) as a wiping surface of the vehicle. The front window 1 has a black ceramic area 1a (shaded portion in FIG. 1) colored black at the edge.

  As shown in FIG. 2, the vehicle wiper device 2 includes a motor 11 as a single drive source, and a base end portion of a swinging crank arm 12 is integrally rotated with the rotation shaft 11 a at a distal end portion of the rotation shaft 11 a. The base end portion of the telescopic crank arm 13 is fixed so as to be rotatable together with the rotary shaft 11a. The swinging crank arm 12 and the telescopic crank arm 13 are provided such that the distal ends extend in different directions from the rotating shaft 11a.

  The motor 11 is a motor (a DC motor with a brush or a brushless motor) that is electrically connected to the control unit 14 and that rotates (rotates) the rotating shaft 11a in an angle range of less than 180 ° by the control unit 14. is there.

  Further, the vehicle is provided with a driver's seat side pivot shaft 15 rotatably supported at a fixed position with respect to the vehicle body, and a base end portion of the driver's seat side pivot shaft 15 is provided as a second wiper arm lever. The driver seat side swing lever 16 is fixed, and the driver seat side second wiper arm 17 (the arm head 17 a) is fixed to the tip of the driver seat side pivot shaft 15. As shown in FIG. 1, a second wiper blade 18 for wiping the driver's seat side of the front window 1 is connected to the distal end portion of the second wiper arm 17.

  The front end portion of the swing crank arm 12 and the driver seat side swing lever 16 are connected by a first connecting rod 19. As a result, when the motor 11 is driven, the swinging crank arm 12 rotates, and the power is transmitted to the driver seat side swing lever 16 via the first connecting rod 19, thereby the driver seat side swing lever. 16 is swung, and the second wiper arm 17 is swung together with the driver's seat-side swing lever 16 (rotatingly driven by a fixed axis with respect to the vehicle). Then, the range between the upper reversal position and the lower reversal position of the driver seat side of the front window 1 is wiped back and forth by the second wiper blade 18. In FIG. 1, the normal wiping range H <b> 1 by the second wiper blade 18 is illustrated by a one-dot chain line.

  Further, the vehicle is provided with a first passenger seat side pivot shaft 21 supported so as to be rotatable about a first axis L1 at a fixed position with respect to the vehicle body, and a second passenger seat side pivot shaft 22 is provided. It is supported and provided so as to be rotatable about a second axis L2 at a fixed position with respect to the vehicle body. In the present embodiment, by providing the second passenger seat side pivot shaft 22 so as to penetrate the inside of the cylindrical first passenger seat side pivot shaft 21, the first axis L1 and the second axis L2 are the same. It arrange | positions on the straight line L (concentric).

  A first passenger seat side swing lever 25 is fixed to the base end portion of the first passenger seat side pivot shaft 21, and a first drive lever 26 is fixed to the distal end portion of the first passenger seat side pivot shaft 21. Has been. The first passenger seat side swing lever 25 and the driver seat side swing lever 16 that rotate together with the first drive lever 26 are drivingly connected by a second connecting rod 27. As a result, when the motor 11 is driven and the driver seat side swing lever 16 swings as described above, the driving force is transmitted to the first passenger seat side swing lever 25 via the second connecting rod 27. Thus, the first passenger seat side swing lever 25 swings, and the first drive lever 26 swings (rotates) around the first axis L1 together with the first passenger seat side swing lever 25. In the present embodiment, the first connecting rod 19 and the second connecting rod 27 constitute a swinging rod that directly connects the swinging crank arm 12 and the first drive lever 26.

  Further, the second passenger seat side pivot shaft 22 is formed longer than the first passenger seat side pivot shaft 21, and the base end portion and the distal end portion thereof protrude from the first passenger seat side pivot shaft 21 in the axial direction. A second passenger seat side swing lever 28 is fixed to the base end portion, and a second drive lever 29 is fixed to the distal end portion of the second passenger seat side pivot shaft 22.

  The distal end of the telescopic crank arm 13 and the second passenger seat side swing lever 28 (which rotates together with the second drive lever 29) are connected by a third connecting rod 31. As a result, when the motor 11 is driven, the telescopic crank arm 13 is rotated, and the power is transmitted to the second passenger seat side swing lever 28 via the third connecting rod 31, thereby the second passenger seat. The side swing lever 28 swings, and the second drive lever 29 swings (turns) together with the second passenger seat side swing lever 28. The first passenger seat side pivot shaft 21 and the second passenger seat side pivot shaft 22 are not linked to each other. In other words, the first passenger seat side pivot shaft 21 and the second passenger seat side pivot shaft 22 are arranged on the same straight line L, but their rotation operations are independent of each other. In the present embodiment, the third connecting rod 31 constitutes an expansion / contraction rod that directly connects the expansion / contraction crank arm 13 and the second drive lever 29.

  As shown in FIGS. 2 to 6, the vehicle wiper device 2 includes a first driven lever having a proximal end connected to a third axis L3 on the distal end side of the first drive lever 26 so as to be rotatable. 32.

  Further, the vehicle wiper device 2 is connected to the base end side so as to be rotatable about the fourth axis L4 at the tip end side of the first driven lever 32, and is located at the tip end side of the second drive lever 29. An arm head 33 is provided as a second driven lever that is pivotably connected to the front end side about a 5-axis line L5 (swing center axis). As shown in FIG. 1, the arm head 33 constitutes a part of the first wiper arm 35, and a first wiper blade 36 for wiping the front passenger seat side of the front window 1 at the tip of the first wiper arm 35. Are connected.

  The first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33 have a length from the first axis L1 (the second axis L2) to the third axis L3, and The lengths from the fourth axis L4 to the fifth axis L5 are set and connected so as to be the same. The first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33 have a length from the third axis L3 to the fourth axis L4 and the first axis L1 ( The lengths from the second axis L2) to the fifth axis L5 are set and connected so as to be the same. That is, they are a parallelogram-shaped link mechanism in which the first drive lever 26 and the arm head 33 are kept parallel, and the second drive lever 29 and the first driven lever 32 are kept parallel. In the present embodiment, the first drive lever 26, the first driven lever 32, and the arm head 33 constitute a swing mechanism that reciprocally swings the first wiper arm 35. Further, in the present embodiment, the second drive lever 29 is an expansion / contraction mechanism that expands and contracts the first wiper arm 35 in the longitudinal direction thereof, and a swing center axis (fifth axis L5) on the proximal end side of the first wiper arm 35. A shaft moving mechanism is configured to move the window in the vertical direction of the front window 1. Further, in the present embodiment, the swinging crank arm 12, the first connecting rod 19, the driver seat side swing lever 16, the second connecting rod 27, and the first passenger seat side swing lever 25 are replaced with the first drive lever 26. A swinging transmission mechanism is configured to transmit the driving force to. In this embodiment, the telescopic crank arm 13, the third connecting rod 31, and the second passenger seat side swing lever 28 constitute an telescopic transmission mechanism that transmits driving force to the second drive lever 29. .

  In the swing transmission mechanism, the swing crank arm 12 rotates forward and backward in a first angle range θ1 that does not include a dead point where the rotating shaft 11a cannot be rotated even if an external force is applied to the first drive lever 26. Is set to be. Further, the telescopic transmission mechanism is configured such that the telescopic crank arm 13 is forward / reverse in a second angle range θ2 including a dead point at an intermediate point where the rotating shaft 11a cannot be rotated even if an external force is applied to the second drive lever 29. It is set to rotate. That is, the swinging crank arm 12 and the telescopic crank arm 13 are set so that the swinging crank arm 12 and the first connecting rod 19 (specifically, the joints α1 to α3) do not line up in a straight line when driven, The telescopic crank arm 13 and the third connecting rod 31 (specifically, the joints A1 to A3) are set so as to be arranged in a straight line at an intermediate point during driving (see FIG. 4).

  Further, in the present embodiment, the second connecting rod 27 that is a part of the oscillation transmission mechanism is in the axial direction of the first axis L1 in at least a part of the driving rod 27 (see FIGS. 3 to 6). When viewed from the side, the first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33 are set so as to pass inside. In addition, the third connecting rod 31 that is a part of the expansion / contraction transmission mechanism is at least partially in the driving state (see FIGS. 3 to 5), as viewed from the axial direction of the first axis L <b> 1. The first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33 are set so as to pass inside.

  From the above configuration, the vehicle wiper device 2 rotates the second drive lever 29 and rotates the second drive lever 29 when the first drive lever 26 is rotated and the wiping operation by the first wiper blade 36 is performed. The wiping range by the first wiper blade 36 can be expanded by moving the fifth axis L5 on the front end side to the upper side of the front window 1.

  That is, as shown in FIG. 1, the wiping range by the first wiper blade 36 when the first wiper arm 35 is simply swung (with the fifth axis L5 at a fixed position) is defined as the reference range Z1 as described above. When the first wiper arm 35 is swung while moving the fifth axis L5 upward, the wiping range by the first wiper blade 36 is an enlarged range Z2 that is substantially enlarged.

  In the vehicle wiper device 2 of the present embodiment, when the motor 11 is driven, the first drive lever 26 swings (rotates) within a range below the front window 1 relative to the first axis L1. In other words, it is set so as not to swing (turn) above the first axis L1.

  Further, the second wiper blade 18 on the driver's seat side of the present embodiment is in the lower inversion position (stop position), and the tip side thereof is upward in the direction along the surface of the front window 1 of the first wiper blade 36. Arranged on the side. In other words, the top end side of the second wiper blade 18 and the base end side of the first wiper blade 36 are overlapped in the vertical direction in the direction along the surface of the front window 1 in a state of being in the lower inversion position (stop position). It is set to have a range W. Further, the wiping range H1 of the second wiper blade 18 includes all the movement trajectory X of the base end portion of the first wiper blade 36 (however, the second wiper blade 18 is lower than the lower reverse position (stop position) of the second wiper blade 18). The length and the lap range W are set such that the movement trajectory of the part is excluded). Thereby, there is no wiping-out range inside the wiping range by the first wiper blade 36 (that is, the expansion range Z2).

Next, the operation of the vehicle wiper device 2 configured as described above will be described.
The second wiper arm 17 and the second wiper blade 18 simply rotate (swing) around the driver's seat side pivot shaft 15 when the motor 11 is driven. The movement on the side of the first wiper arm 35 and the first wiper blade 36 will be described in detail.

  For example, as shown in FIG. 2, when the washer switch provided in the driver's seat is operated in a state where the first wiper arm 35 (and the first wiper blade 36) is at the stop position, the motor 11 is operated by the control unit 14. Is driven, and the first driving lever 26 and the second driving lever 29 are rotated by the driving force, and an enlarged wiping operation is performed.

  At this time, first, as shown in FIG. 3, the first drive lever 26 is rotated until the first wiper arm 35 (and the first wiper blade 36) is moved forward by about 1/4 between the upside down positions. The second drive lever 29 is also rotated so that the fifth axis L5 is moved to the upper side of the front window 1. Thereby, the front-end | tip part of the 1st wiper blade 36 (refer FIG. 1) is moved upwards along the width direction edge part of the front window 1, and the front window 1 is wiped off.

  Then, as shown in FIG. 4, the first drive lever 26 is further rotated until the first wiper arm 35 (and the first wiper blade 36) is moved about halfway between the upside down positions. The second drive lever 29 is also rotated so that the 5-axis line L5 is moved further upward. As a result, as shown in FIG. 1, the front end portion of the first wiper blade 36 is moved to a position near the upper corner of the front window 1 and the front window 1 is wiped away. At this time, the expansion / contraction transmission mechanism is in a dead center state where the rotation shaft 11a cannot be rotated even if an external force is applied to the second drive lever 29, and the expansion / contraction crank arm 13 and the third connecting rod 31 (in detail, the joints A1 to A3) are arranged in a straight line.

  Then, as shown in FIG. 5, until the first driving lever 26 is further rotated and the first wiper arm 35 (and the first wiper blade 36) is moved forward by about 3/4 between the upside down positions. The second drive lever 29 is also rotated (in the reverse direction by exceeding the dead point) so that the fifth axis L5 is moved to the lower side of the front window 1. Thereby, the front-end | tip part of the 1st wiper blade 36 (refer FIG. 1) is moved to the width direction (left direction in FIG. 1) substantially along the upper end of the front window 1, and the front window 1 is wiped off.

  As shown in FIG. 6, the fifth axis L5 is further lowered until the first drive lever 26 is further rotated and the first wiper arm 35 (and the first wiper blade 36) finishes moving forward. The second drive lever 29 is also rotated (in the reverse direction) so as to be moved to the reference position (the same position as the stop position). Accordingly, the enlarged range Z2 of the front window 1 is wiped by the first wiper blade 36 (see FIG. 1).

During the backward movement, the enlarged range Z2 is wiped off by the first wiper blade 36 (see FIG. 1) due to the reverse movement of the forward movement described above.
Next, the effect of the said embodiment is described below.

  (1) When the single motor 11 is driven, the driving force is transmitted to the first drive lever 26 via the swinging transmission mechanism including the swinging crank arm 12 and the expansion and contraction transmission including the telescopic crank arm 13. It is transmitted to the second drive lever 29 via the mechanism. Then, when the first wiper arm 35 swings by the rotation of the first drive lever 26, that is, when the wiping operation by the first wiper blade 36 is performed, the rotation of the second drive lever 29 causes the second drive lever 29 to rotate. By moving the fifth axis L5 (the base end side of the first wiper arm 35) on the distal end side, the wiping range by the first wiper blade 36 can be expanded.

  Specifically, in the transmission mechanism for swinging, the swinging crank arm 12 is forward / reverse in a first angle range θ1 that does not include a dead point where the rotating shaft 11a cannot be rotated even if an external force is applied to the first drive lever 26. Therefore, when the rotary shaft 11a rotates one reciprocating forward and reverse, the first drive lever 26 also swings one reciprocatingly, and the wiping operation by the first wiper blade 36 reciprocates once. Further, the telescopic transmission mechanism is configured so that the telescopic crank arm 13 rotates in the forward and reverse directions in the second angle range θ2 including a dead point at an intermediate point where the rotating shaft 11a cannot be rotated even when an external force is applied to the second drive lever 29. Therefore, when the rotary shaft 11a rotates forward and backward by one reciprocating motion, the second drive lever 29 swings by two reciprocating motions. That is, the fifth axis L5 on the tip side of the second drive lever 29 is moved to the upper side (uppermost end) of the front window 1 at an intermediate point between the upside down positions of the first wiper blade 36, and the first wiper blade 36 is moved. Can be moved to the lower side (lowermost end) of the front window 1 in a state where is in the upside down position. Therefore, it is possible to wipe away a portion near the upper corner of the front window 1, and specifically, the enlarged range Z2 in which the wiping range by the first wiper blade 36 is enlarged can be set.

  (2) Since the swing transmission mechanism includes the swing rods (the first connecting rod 19 and the second connecting rod 27) that directly connect the swing crank arm 12 and the first drive lever 26, the swing crank The arm 12 and the first drive lever 26 are connected without waste. In addition, since the expansion / contraction transmission mechanism includes an expansion / contraction rod (third connection rod 31) that directly connects the expansion / contraction crank arm 13 and the second drive lever 29, the expansion / contraction crank arm 13 and the second drive lever. 29 are connected without waste. Therefore, for example, the number of parts (the number of links (nodes)) does not increase as compared with a vehicle wiper device connected so as to change motion in a complicated manner.

  (3) The swing rod includes a first connecting rod 19 that connects the swing crank arm 12 and the driver seat side swing lever 16 connected to the second wiper arm 17, and the driver seat side swing lever 16 and the first rod. The second connecting rod 27 connects the drive lever 26 (specifically, the first passenger seat side swing lever 25 that rotates together with the first drive lever 26), so that the second swing rod has two swing rods. It is also used for driving the wiper arm 17, and no waste occurs.

  (4) The second connecting rod 27, which is a part of the swinging transmission mechanism, is in at least a part of the state during driving, and the first driving lever 26 and the second driving are viewed from the axial direction of the first axis L1. Since it is set so as to pass through the inside of the portion surrounded by the lever 29, the first driven lever 32, and the arm head 33, the mounting space can be reduced in size as compared with the one that does not pass through the inside.

  (5) The third connecting rod 31, which is a part of the expansion / contraction transmission mechanism, is in at least a part of the driving state, and viewed from the axial direction of the first axis L1, the first drive lever 26 and the second drive Since it is set so as to pass through the inside of the portion surrounded by the lever 29, the first driven lever 32, and the arm head 33, the mounting space can be reduced in size as compared with the one that does not pass through the inside.

The above embodiment may be modified as follows.
In the above embodiment, the swing crank arm 12 that rotates integrally with the rotation shaft 11 a of the motor 11 and the driver seat side swing lever 16 that rotates integrally with the second wiper arm 17 are connected by the first connecting rod 19. The base end portion of the second wiper arm 17 may be coupled to the rotary shaft 11a so as to be integrally rotatable.

  Specifically, as shown in FIG. 7, the motor 11 may be disposed in the vicinity of the base end portion of the second wiper arm 17, and the rotation shaft 11 a may be used as the driver seat side pivot shaft 15 of the above embodiment. In this case, the base end portion of the swinging crank arm 12 is fixed to the rotating shaft 11a so as to be integrally rotatable with the rotating shaft 11a, and the base end portion of the telescopic crank arm 13 is fixed so as to be integrally rotatable with the rotating shaft 11a. . Then, the swinging crank arm 12 and the first passenger seat side swing lever 25 are drivably connected by the connecting rod 51, and the telescopic crank arm 13 and the second passenger seat side swing lever 28 are connected by the connecting rod 52. The drive connection may be performed at. In this example, the swinging crank arm 12, the connecting rod 51, and the first passenger seat side swinging lever 25 constitute a swinging transmission mechanism that transmits driving force to the first drive lever 26. In this example, the extension / contraction crank arm 13, the connecting rod 52, and the second passenger seat side swing lever 28 constitute an extension / contraction transmission mechanism that transmits the driving force to the second drive lever 29.

  In this way, the base end portion of the second wiper arm 17 is connected to the rotating shaft 11a of the motor 11 so as to be integrally rotatable, so that the second wiper arm 17 is driven with fewer levers, rods, etc. compared to the above embodiment. can do.

  In the above embodiment, the single wiper arm 17 is driven by the single motor 11 in addition to the first wiper arm 35. However, the present invention is not limited to this. For example, the second wiper arm 17 is a separate body. You may make it drive with a motor. In this case, the first connecting rod 19 and the second connecting rod 27 include the swinging crank arm 12 and the first drive lever 26 (specifically, the first passenger seat side swing lever 25 that rotates together with the first drive lever 26). And a single rocking rod connecting the two. Of course, the swinging crank arm 12 and the first drive lever 26 (specifically, the first passenger seat side swing lever 25 that rotates together with the first drive lever 26) are connected by a single swinging rod. Alternatively, the swing crank arm 12 and the driver seat side swing lever 16 may be connected by a first connecting rod 19 (not constituting a swing transmission mechanism) to operate in the same manner as in the above embodiment.

  In the above embodiment, the second connecting rod 27 is set so as to pass inside the portion surrounded by the first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33. However, it is not limited to this, and it may be set not to pass through the inside.

  In the above embodiment, the third connecting rod 31 is set so as to pass inside the portion surrounded by the first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33. However, it is not limited to this, and it may be set not to pass through the inside.

  In the above embodiment, the first axis L1 of the first drive lever 26 and the second axis L2 of the second drive lever 29 are arranged on the same straight line L. However, the present invention is not limited to this. It is good also as a structure arrange | positioned in the position which the 1st axis line L1 of 1 drive lever and the 2nd axis line L2 of the 2nd drive lever shifted | deviated.

In the above embodiment, the first drive lever 26 is rotated within the range below the first axis L1, but is configured to be rotated within the range above the first axis L1. Also good.
In the above embodiment, the length from the first axis L1 to the third axis L3 and the length from the fourth axis L4 to the fifth axis L5 are set to be the same, and the third axis Although the length from L3 to the fourth axis L4 and the length from the first axis L1 to the fifth axis L5 are set to be the same, they may be changed to different lengths.

  In the above embodiment, the base end portion of the first wiper arm 35 is disposed at a position near the center in the vehicle width direction, and the base end portion of the second wiper arm 17 is a position near the driver seat side end portion in the vehicle width direction. However, the present invention is not limited to this and may be arranged in reverse.

  Specifically, as shown in FIG. 8, the base end portion of the first wiper arm 35 is disposed at a position closer to the center in the vehicle width direction, and the base end portion of the second wiper arm 17 is the passenger seat in the vehicle width direction. It is good also as a structure arrange | positioned in the position near the side (left side in FIG. 8) edge part. The position near the center in the vehicle width direction is a position closer to the center in the vehicle width direction than both ends in the vehicle width direction, and the position near the passenger seat side end in the vehicle width direction is the position in the vehicle width direction. It is a position closer to the passenger seat side edge than the center. In the vehicle of this example (see FIG. 8), the driver's seat is disposed on the opposite side (right side in FIG. 8) from the above embodiment.

  In this way, a wide space 61 (mesh portion in FIG. 8) can be secured on the driver's seat side. Therefore, for example, in the space 61 on the driver's seat side, a head-up display device or the like for displaying a traveling state or the like on the front window can be easily arranged.

The technical idea that can be grasped from the embodiment and the modified examples will be described.
(A) The vehicle wiper device according to any one of claims 1 to 7, wherein a base end portion of the first wiper arm is disposed at a position closer to a center in a vehicle width direction, and the second wiper arm The vehicle wiper device characterized in that the base end portion is disposed at a position near the passenger seat side end portion in the vehicle width direction.

  According to this configuration, the base end portion of the first wiper arm is disposed at a position near the center in the vehicle width direction, and the base end portion of the second wiper arm is at a position near the passenger seat side end portion in the vehicle width direction. Since it is arranged, a large space can be secured on the driver's seat side. Therefore, for example, it becomes easy to arrange a head-up display device or the like for displaying a traveling state or the like on the front window in a space on the driver's seat side.

  DESCRIPTION OF SYMBOLS 1 ... Front window (wiping surface), 11 ... Motor (drive source), 11a ... Rotating shaft, 12 ... Swing crank arm which comprises a part of rocking transmission mechanism, 13 ... A part of expansion / contraction transmission mechanism A crank arm for expansion and contraction, 16... A driver-side swing lever (second wiper arm lever) that constitutes a part of the swing transmission mechanism, 17 a second wiper arm, 19. A first connecting rod constituting a part of the rod, 25 a first passenger seat side rocking lever constituting a part of the rocking transmission mechanism, 26 a first drive lever, 27 a part of the rocking transmission mechanism, and A second connecting rod that constitutes a part of the swinging rod, 28 a second passenger seat side swinging lever that constitutes a part of the telescopic transmission mechanism, 29 a second drive lever, and 31 a one of the telescopic transmission mechanism Part 3 connecting rod (extension and contraction) Rod), 32 ... first driven lever, 33 ... arm head (second driven lever), 35 ... first wiper arm, 36 ... first wiper blade, 51 ... connecting rod (swing) constituting a part of the oscillation transmission mechanism (Moving rod), 52... Connecting rod (stretching rod) constituting a part of the expansion / contraction transmission mechanism, L1... First axis, L2 ... second axis, L3 ... third axis, L4 ... fourth axis, L5. Fifth axis, θ1... First angle range, θ2.

Claims (7)

A first drive lever having a base end supported so as to be rotatable about a first axis located at a fixed position with respect to the vehicle body;
A second drive lever having a base end supported so as to be rotatable around a second axis located at a fixed position with respect to the vehicle body;
A first driven lever having a proximal end connected to be pivotable about a third axis on the distal end side of the first drive lever;
The base end side is connected to be pivotable about the fourth axis on the tip side of the first driven lever, and the tip side is pivotable about the fifth axis on the tip side of the second drive lever. A coupled second driven lever;
A first wiper arm that is provided so as to operate integrally with the second driven lever, and a first wiper blade for reciprocating wiping between the upside down positions of the wiping surface is connected to the tip;
A swinging transmission mechanism including a swinging crank arm fixed so as to rotate integrally with a rotation shaft of a single drive source, and transmitting a driving force to the first drive lever;
A vehicle wiper device, comprising: an expansion / contraction transmission mechanism that includes an expansion / contraction crank arm fixed so as to rotate integrally with the rotation shaft of the drive source, and transmits a driving force to the second drive lever. The vehicle wiper device according to claim 1,
The swinging transmission mechanism is configured such that the swinging crank arm is rotated forward and backward within a first angle range that does not include a dead point where the rotating shaft cannot be rotated even when an external force is applied to the first drive lever.
The telescopic transmission mechanism is configured such that the telescopic crank arm rotates forward and backward within a second angle range including a dead center that cannot rotate the rotating shaft even when an external force is applied to the second drive lever. A vehicle wiper device characterized in that it is set to be The vehicle wiper device according to claim 2,
The swing transmission mechanism includes a swing rod that directly connects the swing crank arm and the first drive lever;
The telescopic transmission mechanism includes a telescopic rod that directly connects the telescopic crank arm and the second drive lever. The vehicle wiper device according to claim 3,
The swing rod connects a first connecting rod that connects the swing crank arm and a second wiper arm lever connected to the second wiper arm, and connects the second wiper arm lever and the first drive lever. A vehicle wiper device that is a second connecting rod. The vehicle wiper device according to any one of claims 1 to 3,
A vehicle wiper device, wherein a base end portion of a second wiper arm is connected to the rotation shaft of the drive source so as to be integrally rotatable. The vehicle wiper device according to any one of claims 1 to 5,
At least a part of the oscillation transmission mechanism is in at least a part of the driving mechanism when viewed from the axial direction of the first axis, and the first drive lever, the second drive lever, and the first driven lever. And a vehicle wiper device set so as to pass inside a portion surrounded by the second driven lever. The vehicle wiper device according to any one of claims 1 to 6,
At least a part of the expansion / contraction transmission mechanism is in at least a part of the driving mechanism when viewed from the axial direction of the first axis, and the first driving lever, the second driving lever, and the first driven lever. And a vehicle wiper device set so as to pass inside a portion surrounded by the second driven lever.