JP6623762B2 - Vehicle wiper device - Google Patents

Description

  The present invention relates to a vehicle wiper device.

  As a vehicle wiper device mounted on a vehicle such as an automobile, a wiper arm and a wiper blade are rotated around one point, and a four-bar linkage is provided to simplify a wiping range of a front window (wiping surface). There is one that has a desired range (a range that is substantially enlarged) different from a large fan shape (for example, see Patent Document 1).

  Such a vehicle wiper device reciprocates a main lever (drive lever) rotatably supported on a vehicle body at a lower end side (ground side) of a front window by a driving force of a driving source. When the other levers including the arm head are rotated by the driving force of the main lever (drive lever), it is possible to wipe a portion closer to the upper corner of the front window than a simple fan shape.

JP-A-11-227572

  However, in the vehicle wiper device using the four-bar linkage as described above, the wiping range that can be expanded is a range uniquely set by each lever, and the wiping range cannot be changed and expanded.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and an object thereof is to provide a vehicle wiper device capable of variably expanding a wiping range.

A vehicle wiper device that solves the above-mentioned problem has a first drive source fixed to a vehicle body and a base end portion rotatably supported around a first axis at a fixed position with respect to the vehicle body. A first drive lever that is rotated forward and backward by the driving force of one drive source, a second driven lever that is rotated with the rotation of the first drive lever, and the second driven lever as an arm head A first wiper arm , which is included in a base end and is connected to a tip end of a first wiper blade for reciprocating wiping between a vertically inverted position of a wiping surface of a vehicle, the first drive lever and the second driven lever; And a swing link mechanism that is driven by the driving force of the first drive source and reciprocates the first wiper arm, and is fixed to the vehicle body separately from the first drive source. a second drive source and, in a fixed position relative to the vehicle body A second driving lever rotatably proximal end about the second axis is forward or reverse rotation by the driving force of the supporting the second drive source that, the swing by the driving of the first drive source The first driven arm is pivoted by a link mechanism, and the second drive lever is rotated forward and reverse by driving the second drive source, thereby driving the second driven lever at the distal end of the second drive lever. A control unit that controls the driving of the first drive source and the second drive source so that the pivot axis of the lever approaches or moves away from the upper corner of the wiping surface .

  According to this configuration, the swinging mechanism is driven by the driving force of the first drive source, the first wiper arm is reciprocally rocked, the telescopic mechanism is driven by the driving force of the second drive source, and the first wiper arm is moved. It is expanded and contracted in its longitudinal direction. The first drive source and the second drive source are driven and controlled by the control unit so that the first wiper arm expands and contracts by the expansion and contraction mechanism corresponding to the swing operation of the first wiper arm by the swing mechanism. The wiping range by one wiper blade can be variably enlarged (increased range).

  The vehicle wiper device preferably includes a second wiper arm driven by the driving force of the first drive source and connected to a tip end of a second wiper blade for wiping the wiping surface.

  According to this configuration, since the second wiper arm is driven by the driving force of the first drive source and the second wiper blade for wiping the wiping surface is connected to the distal end, the drive of the first drive source is performed. The first and second wiper arms can be driven by a force without providing a separate drive source.

A the vehicle wiper apparatus, before KiYurado link mechanism further have a pre-Symbol first driven lever pivotably base end around the third axis on the distal end side of the first driving lever is connected and, said oscillating said second follower lever, with pivotally base end is connected about a fourth axis which is distal of said first driven lever, at the tip side of the second driving lever rotatably distal end is connected about a fifth axis as the central axis.

  According to this configuration, when the first driving lever is rotated by the driving force of the first driving source, the first driving lever, the first driven lever, and the second driven lever are rotated, and the second driven lever is rotated. At the same time, the first wiper arm is rotated, and the swing operation is performed. When the second driving lever is rotated by the driving force of the second driving source, the fifth axis as the swing center axis at the distal end side of the second driving lever is moved in the vertical direction of the wiping surface, The expansion / contraction operation is performed, and the above-described effects can be obtained.

  The vehicle wiper device, comprising: a second wiper arm that is driven in synchronization with the first wiper arm and has a second wiper arm connected to a tip end for wiping the wiping surface. In a state where the first wiper blade is located at the lower turning position, the first wiper blade is disposed at a position displaced in the vehicle width direction, and the distal end thereof is in the vertical direction along the base end side of the first wiper blade and along the wiping surface. It is preferable to arrange so that it may overlap.

  According to this configuration, the second wiper blade is disposed at a position deviated from the first wiper blade in the vehicle width direction in a state in which the second wiper blade is at the lower turning position, and has its tip end side wiped with the base end side of the first wiper blade. Since it is arranged so as to overlap in the vertical direction along the surface, it is possible to reduce or eliminate the unwiped area on the inside when the wiping range by the first wiper blade is variably enlarged.

In the above-mentioned vehicle wiper device, it is preferable that the wiping range of the second wiper blade is set so as to include the entire movement locus of the base end of the first wiper blade.
According to this configuration, since the wiping range of the second wiper blade is set to include the entire movement locus of the base end of the first wiper blade, the inside of the wiping range (enlarged range) of the first wiper blade is set. Can be eliminated.

In the vehicle wiper device, it is preferable that a wiping range of the first wiper blade be set to include a functional area on the wiping surface used by a wiping surface using device.
According to this configuration, since the wiping range of the first wiper blade is set to include the functional area on the wiping surface used by the wiping surface using device, the functional area can be wiped, and the wiping surface using device can be used. Can be used favorably.

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

FIG. 1 is a partial schematic view of a vehicle including a vehicle wiper device according to an embodiment. 1 is a plan view of a vehicle wiper device according to one embodiment. FIG. 3 is a sectional view taken along the line AA in FIG. 2. FIG. 4 is a plan view for explaining the operation of the vehicle wiper device according to one embodiment. FIG. 4 is a plan view for explaining the operation of the vehicle wiper device according to one embodiment. FIG. 4 is a plan view for explaining the operation of the vehicle wiper device according to one embodiment. FIG. 4 is a plan view for explaining the operation of the vehicle wiper device according to one embodiment. FIG. 4 is a plan view for explaining the operation of the vehicle wiper device according to one embodiment. FIG. 4 is a plan view illustrating a cover member according to the embodiment. FIG. 4 is a plan view illustrating a cover member according to the embodiment. FIG. 4 is a plan view illustrating a cover member according to the embodiment. Sectional drawing for demonstrating the fixing structure of the cover member in one Embodiment. FIG. 4 is a plan view for explaining protrusions of a cover member according to one embodiment. FIG. 7 is a plan view for explaining a vehicle wiper device in another example. FIG. 9 is a partial schematic view of a vehicle provided with a vehicle wiper device 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 (in the ground direction) a front window 1 as a wiping surface of the vehicle. The front window 1 has a black ceramic area 1a (hatched portion in FIG. 1) which is colored black at its edge.

  As shown in FIGS. 2 and 4 to 8, the vehicle wiper device 2 includes a plate-shaped central frame 3 and a pair of one ends fixed to the central frame 3 so as to extend from the central frame 3 to both sides in the vehicle width direction. , And first and second holder members 6 and 7 fixed to the other ends of the pipe frames 4 and 5, respectively. In the vehicle wiper device 2, the support portion 3a provided on the center frame 3 is supported by the vehicle, and the fixing portions 6a, 7a formed on the first and second holder members 6, 7 are fastened to the vehicle. Thus, the vehicle is fixed to the vehicle (its body).

Further, the vehicle wiper device 2 includes a first motor 11 as a first drive source and a second motor 12 as a second drive source fixed to the back surface (the surface on the inside of the vehicle) of the center frame 3. .
The rotating shaft 11a of the first motor 11 penetrates the center frame 3 and protrudes from the surface of the center frame 3 (the surface on the outside of the vehicle), and the first driving crank arm 13 is fixed to the tip of the rotating shaft 11a. Have been. The rotating shaft 12a of the second motor 12 penetrates the center frame 3 and protrudes from the surface of the center frame 3 (the surface on the outside of the vehicle). Has been fixed. Here, the second motor 12 is controlled so that the rotation shaft 12a can be rotated forward and reverse at a rotation angle of less than one rotation (a predetermined rotation angle in the present embodiment), and can also control the rotation speed. DC motor. Each of the first motor 11 and the second motor 12 has a magnetic sensor (magnetic resistance element or the like) therein, and the magnetic sensor is fixed to, for example, a worm wheel that rotates integrally with the rotating shafts 11a and 12a. By sensing the magnetism of the sensor magnet, a rotation position signal corresponding to the rotation position (rotation angle) of the rotation shafts 11a and 12a can be output.

  A driver's seat-side pivot shaft 15 is rotatably supported by the first holder member 6, and a driver's seat pivot shaft 15 is provided at a base end (an end on the back side in FIG. 2) of the driver's seat-side pivot shaft 15. The side swing lever 16 is fixed, and a second wiper arm 17 (the arm head thereof) on the driver's seat side is fixed to a distal end portion (an end on the near side in FIG. 2) of the driver's seat side pivot shaft 15. I have. 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 a distal end portion of the second wiper arm 17.

  The distal end of the first drive crank arm 13 and the driver's seat side swing lever 16 are connected by a first connection rod 19. As a result, when the first motor 11 is driven, the first drive crank arm 13 rotates, and its power is transmitted to the driver's seat side swing lever 16 via the first connecting rod 19, and the driver's seat side swing lever 16 is rotated. The moving lever 16 swings, the second wiper arm 17 swings together with the driver's seat side swinging lever 16, and the second wiper blade 18 moves the upper windshield position between the upper and lower inverted positions on the driver's seat side of the front window 1. The area in between is reciprocated. In FIG. 1, the normal wiping range H1 by the second wiper blade 18 is shown by a dashed line.

  As shown in FIG. 3, the first passenger seat-side pivot shaft 21 is supported by the second holder member 7 so as to be rotatable around the first axis L <b> 1, and the second passenger seat-side pivot shaft 22. Are rotatably supported about the second axis L2. In the present embodiment, the first axis L1 and the second axis L2 are arranged on the same straight line L (concentric).

  More specifically, the second holder member 7 is formed with a cylindrical portion 7b, on the inner peripheral side of which a first passenger seat side pivot shaft 21 is rotatably supported via a bearing 23. The first passenger seat-side pivot shaft 21 is formed in a cylindrical shape, and a second passenger seat-side pivot shaft 22 is rotatably supported on the inner peripheral side thereof via a bearing 24. As a result, the first axis L1 of the first passenger seat-side pivot shaft 21 and the second axis L2 of the second passenger seat-side pivot shaft 22 are each at a fixed position (an immovable position) with respect to the vehicle body. They are arranged on a straight line L.

  A first passenger seat side pivot shaft 25 is fixed to a base end of the first passenger seat side pivot shaft 21, and a first drive lever 26 is fixed to a distal end portion of the first passenger seat side pivot shaft 21. Have been. Then, as shown in FIG. 2, the first passenger seat side swing lever 25 and the driver seat side swing lever 16 are drivingly connected by a second connecting rod 27. Accordingly, when the first motor 11 is driven and the driver's seat side swing lever 16 swings as described above, the driving force is applied to the first passenger seat side swing lever 25 via the second connecting rod 27. The first passenger seat side swing lever 25 swings by being transmitted, and the first drive lever 26 swings (rotates) around the first axis L1 together with the first passenger seat side swing lever 25.

  As shown in FIG. 3, the second passenger seat-side pivot shaft 22 is formed longer than the first passenger seat-side pivot shaft 21, and the base end and the front end thereof are formed on the first passenger seat-side pivot shaft 21. A second passenger seat side swinging lever 28 is fixed to the base end of the shaft, and a second driving lever 29 is fixed to the distal end of the second passenger seat side pivot shaft 22. .

  The distal end of the second drive crank arm 14 and the second passenger seat side swing lever 28 are connected by a third connecting rod 31. Accordingly, when the second motor 12 is driven, the second drive crank arm 14 rotates, and the power is transmitted to the second passenger seat side swing lever 28 via the third connecting rod 31 and the second drive crank arm 14 is rotated. The second passenger seat side swing lever 28 swings, and the second drive lever 29 swings (rotates) together with the second passenger seat side swing lever 28. Note that the first passenger seat-side pivot shaft 21 and the second passenger seat-side pivot shaft 22 are not interlocked with 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. 2 and FIGS. 4 to 8, the water-proof cover K is shown in the second holder member 7, but the water-proof cover K is not shown in FIG.

  As shown in FIGS. 2 and 4 to 8, the vehicle wiper device 2 includes a first drive lever 26 having a base end connected to a third axis L <b> 3 at a front end thereof so as to be rotatable around a third axis L <b> 3. One driven lever 32 is provided.

  In addition, the vehicle wiper device 2 has a base end connected rotatably about a fourth axis L4 on the distal end side of the first driven lever 32 and a second drive lever 29 on the distal end side. An arm head 33 is provided as a second driven lever whose tip end is connected rotatably about the five axis L5 (the swing center axis). As shown in FIG. 1, the arm head 33 constitutes a first wiper arm 35 together with a retainer 34 and an arm piece (not shown) connected to the tip of the arm head 33, and the tip of the first wiper arm 35 has a front window 1. A first wiper blade 36 for wiping the front passenger seat side is 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, The lengths from the fourth axis L4 to the fifth axis L5 are set to be the same and connected. Further, 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 to be the same and connected. 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 are driven by the driving force of the first motor 11 to swing the first wiper arm 35 back and forth. It constitutes a dynamic link mechanism. In the present embodiment, the second drive lever 29 is a telescopic mechanism that is driven by the driving force of the second motor 12 to expand and contract the first wiper arm 35 in its longitudinal direction. An axis moving mechanism that moves the axis (the fifth axis L5) in the vertical direction of the front window 1 is configured.

  With the above configuration, the vehicle wiper device 2 causes the second drive lever 29 to move to the second drive lever 29 when the first drive lever 26 is rotated by the drive force of the first motor 11 to perform the wiping operation by the first wiper blade 36. (2) Enlarging the wiping range by the first wiper blade 36 by rotating by the driving force of the motor 12 and moving the fifth axis L5 at the distal end side of the second drive lever 29 above the front window 1. Is possible.

  Then, as shown in FIG. 1, the vehicle wiper device 2 of the present embodiment uses the position of the fifth axis L5 when the first wiper blade 36 is at the lower turning position on the front window 1 as a reference position. A reference drive in which the wiping range of the first wiper blade 36 with the axis L5 at the reference position being the reference range Z1, and a movement of the fifth axis L5 above the front window 1 from the reference position to the first wiper A control unit 41 that controls the driving of the first motor 11 and the second motor 12 is provided so as to switch between an expansion drive in which the wiping range by the blade 36 is set to an expansion range Z2 that is larger than the reference range Z1. The control unit 41 is electrically connected to the first motor 11 and the second motor 12, respectively, and receives a rotation position signal (driving angle) corresponding to the rotation position (rotation angle) of the rotation shafts 11a and 12a input thereto. The driving of the first motor 11 and the second motor 12 is controlled based on the state signal). Specifically, when the position of the fifth axis L5 when the first wiper blade is at the lower turning position is set as the reference position, the control unit 41 controls the drive of the first motor 11 in the reference drive (at this time, the With the second motor 12 stopped, the first wiper blade 36 wipes the reference range Z1 in a state where the fifth axis L5 is at the reference position (the position shown in FIGS. 2, 7, and 8). In other words, in the reference drive, the control unit 41 does not swing (rotate) the second drive lever 29 around the second axis L2 (does not drive the telescopic mechanism (axis moving mechanism)), and the fifth axis The reference range Z1 is wiped by the first wiper blade 36 while keeping L5 at the reference position (by driving only the swing mechanism (swing link mechanism)). On the other hand, the control unit 41 controls the driving of the first motor 11 and the second motor 12 (by driving the telescopic mechanism (axis moving mechanism) and the swing mechanism (swing link mechanism)) in the enlarged drive, The fifth axis L5 on the distal end side of the second drive lever 29 is moved to the upper side of the front window 1 from the reference position (see FIGS. 1, 4 to 6) (or while being moved), and the first axis L5 is moved to the first position. The wiper blade 36 wipes an enlarged range Z2 that is larger than the reference range Z1.

  Further, the control unit 41 of the present embodiment performs the enlargement driving when the first wiper blade 36 moves forward (when the first wiper blade 36 moves from the stop position along the lower end of the front window 1 or from the lower inversion position to the upper inversion position). The second motor 12 is driven and controlled so that the reference drive is performed when the first wiper blade 36 moves backward (moves from the upper turning position to the stop position or the lower turning position). In addition, the control unit 41 simultaneously rotates the first drive lever 26 with the driving force of the first motor 11 to move the second wiper blade 36 while the second motor 12 Drive control is performed so that the first wiper blade 36 wipes up to a position near the upper corner of the front window 1. That is, based on the rotation position signals from the first motor 11 and the second motor 12, the control unit 41 performs the second wiper blade 36 to move the first wiper blade 36 to a position corresponding to the upper corner of the front window 1. The drive of the second motor 12 is controlled such that the fifth axis L5, which is located at the tip end of the drive lever 29 and is the center of rotation of the first wiper blade 36, approaches the corner.

  Further, the second motor 12 and the second drive lever 29 are connected to each other even when a rotational force is applied to the second drive lever 29 when the fifth axis L5 is at the reference position. They are connected via a link mechanism (second drive crank arm 14, third connection rod 31, and second passenger seat side swing lever 28) set to be a dead point that cannot be rotated. That is, the second drive crank arm 14, the third connecting rod 31, and the second passenger's seat side swing lever 28 are in the state where the fifth axis L5 is at the reference position (see FIGS. 2, 7, and 8). The connecting axes A1, A2 and the axis A3 of the rotating shaft 12a of the second motor 12 are set to be straight when connected to each other when viewed from the axial direction.

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

  As shown in FIGS. 9 to 11, the second drive lever 29 and the first driven lever 32 in the vehicle wiper device 2 of the present embodiment include levers (the first drive lever 26, the second drive lever 29, Substantially plate-shaped cover members 51 and 52 are provided to extend to the side surrounded by the one driven lever 32 and the arm head 33) and cover the enclosed side. Specifically, the cover member 51 provided on the second drive lever 29 extends toward the first driven lever 32 so as to cover the enclosed side. The cover member 52 provided on the first driven lever 32 side extends toward the second drive lever 29 so as to cover the enclosed side. The two cover members 51 and 52 have an area on the side surrounded by the levers according to the rotation state of the levers (the first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33). Are increased so that they overlap in a small range (see FIGS. 10 and 11), and overlap in a large range when the area of the enclosed side decreases (see FIG. 9).

  As shown in FIG. 12, the cover member 51 (52) of the present embodiment is made of resin and has a pair of fitting claws 51a (52a) on the inner side (closer to the wiping surface). The fitting nail 51a (52a) is fitted and fixed so as to hold the second drive lever 29 (first driven lever 32).

  As shown in FIGS. 9 to 11, the cover members 51 and 52 cover the entire range surrounded by levers (the first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33). It is formed so as to always cover (in any rotating state).

  The cover members 51 and 52 include connecting shafts 53 to 55 as rotation axes of levers (the first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33) and the first and second connection shafts. It is formed so as to cover the second passenger seat side pivot shaft 22. In the present embodiment, the cover member 51 fixed to the second drive lever 29 always covers the connection shaft 53 and the second passenger seat-side pivot shaft 22 located at both ends of the second drive lever 29, and the first driven lever 32 Is formed so as to always cover the connecting shafts 54 and 55 located at both ends of the first driven lever 32.

  When the first wiper arm 35 and the first wiper blade 36 are at the stop position along the lower end of the front window 1, the cover members 51 and 52 are located on the upper side (the upper side of the front window 1). The cover member 51 provided on the second drive lever 29 is located on the outer side (front side in FIG. 9) of the cover member 52 provided on the first driven lever 32 on the lower side (inside the vehicle body). It is provided so as to overlap the surface.

  Further, as shown in FIG. 13, a surface on the side where the cover members 51 and 52 overlap each other (in FIG. 13, an inner surface of the cover member 51 or an outer surface of the cover member 52), In the embodiment, a projection 52b is formed on a surface on the outside (upper side in FIG. 13) of the cover member 52 provided on the first driven lever 32. As shown in FIGS. 9 to 11, the projection 52 b is always formed (in any rotating state) at a position facing the cover member 51. As shown in FIG. 13, the projection 52b has a slight gap with the cover member 51 when the cover members 51 and 52 are not elastically deformed (no load is applied) or are not plastically deformed. It is formed as follows. In this embodiment, two projections 52b are provided, each of which is formed to protrude in a spherical shape.

Next, the operation of the vehicle wiper device 2 configured as described above will be described.
When the first motor 11 is driven, the second wiper arm 17 and the second wiper blade 18 are driven in synchronization with the first wiper arm 35 and the first wiper blade 36, and simply move the driver's seat side pivot shaft 15. Since it only rotates (oscillates) about the axis, the movement 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 control unit 41 performs the first operation. The one motor 11 is driven, and the first driving lever 26 is rotated by the driving force. Then, at the time of this forward movement, the second motor 12 is driven by the control unit 41, and the enlarging operation is performed.

  At this time, as shown in FIG. 4, first, the first drive lever 26 is rotated to move the first wiper arm 35 (and the first wiper blade 36) forward by about 1/4 between the vertically inverted positions. The second drive lever 29 is also rotated so that the fifth axis L5 is moved above the front window 1. As a result, the tip of the first wiper blade 36 (see FIG. 1) is moved upward substantially along the widthwise end of the front window 1, and the front window 1 is wiped.

  Then, as shown in FIG. 5, the first drive lever 26 is further rotated, and the first wiper arm 35 (and the first wiper blade 36) is moved forward about halfway between the upside down positions. The second drive lever 29 is also rotated so that the five axis L5 is further moved upward. Thereby, as shown in FIG. 1, the tip 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.

  Then, as shown in FIG. 6, until the first drive 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 vertically inverted positions. The second drive lever 29 is also rotated (in the opposite direction) so that the fifth axis L5 is moved below the front window 1. As a result, the tip of the first wiper blade 36 (see FIG. 1) is moved in the width direction (leftward in FIG. 1) substantially along the upper end of the front window 1, and the front window 1 is wiped.

  Then, as shown in FIG. 7, 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) completes the forward movement. The second drive lever 29 is also rotated (in the opposite direction) so as to be moved to the reference position. Thus, the enlarged area Z2 of the front window 1 is wiped by the first wiper blade 36 (see FIG. 1). Then, when the fifth axis L5 reaches the reference position, a link mechanism (the second drive crank arm 14, the third connection rod 31, and the second connection rod 31) that connects the second motor 12 (rotary shaft 12a) and the second drive lever 29 is connected. The passenger seat side swing lever 28) becomes a dead point where the rotation shaft 12a of the second motor 12 cannot be rotated even when a rotational force (external force) is applied to the second drive lever 29.

  Then, as shown in FIG. 8, when the first wiper arm 35 (and the first wiper blade 36) moves backward toward the stop position, the control section 41 cuts off the power supply to the second motor 12, and the second drive is performed. In a state where the lever 29 is stopped in the state of the dead center and the fifth axis L5 is disposed at the reference position (the same position as the position of the fifth axis L5 when the first wiper blade 36 is at the lower turning position), The reference operation is performed. Thus, the reference range Z1 of the front window 1 is wiped by the first wiper blade 36 (see FIG. 1).

  9 to 11, during the wiping operation described above, the area of the area surrounded by the levers (the first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33). Although the shape and shape of the cover members 51 and 52 change, the entire area surrounded by the change in the area of the overlapping portion of the cover members 51 and 52 is always covered by the cover members 51 and 52 (in any rotating state), and the levers are covered with snow. It is possible to prevent foreign matter such as branches and twigs from being caught.

Next, the characteristic effects of the above embodiment will be described below.
(1) The oscillating mechanism (oscillating link mechanism) is driven by the driving force of the first motor 11, the first wiper arm 35 is reciprocally oscillated, and the telescopic mechanism (axis moving mechanism) is driven by the driving force of the second motor 12. ) Is driven, and the first wiper arm 35 expands and contracts in its longitudinal direction. The control unit 41 controls the driving of the first motor 11 and the second motor 12 so that the first wiper arm 35 expands and contracts by the expansion mechanism corresponding to the swing operation of the first wiper arm 35 by the swing mechanism. Therefore, the wiping range by the first wiper blade 36 can be variably enlarged (the enlarged range Z2). Therefore, it is possible to wipe up to a position near the upper corner of the front window 1.

  (2) In the above configuration, when the first drive lever 26 is rotated by the driving force of the first motor 11 and the wiping operation by the first wiper blade 36 is performed, the second drive lever 29 is connected to the first motor 11. Is rotated by the driving force of another second motor 12 to move the fifth axis L5 at the tip end of the second drive lever 29 to the upper side of the front window 1 so that the wiping range by the first wiper blade 36 Can be variably enlarged (enlarged range Z2). Therefore, it is possible to wipe up to a position near the upper corner of the front window 1. In addition, the range of the enlarged range Z2 can be changed by changing the rotation of the second motor 12, that is, the moving amount of the fifth axis L5 and the moving timing (wiping angle position).

  (3) Since the second wiper arm 17 is driven by the driving force of the first motor 11 and the second wiper blade 18 for wiping the front window 1 is connected to the distal end, the driving force of the first motor 11 is provided. The first and second wiper arms 35, 17 are driven without providing a separate drive source, and the second drive lever 29 is driven by the second motor 12, and the second wiper blade 18 variably expands the wide wiping range. That is, the enlarged range Z2 can be wiped.

  (4) When the position of the fifth axis L5 when the first wiper blade 36 is at the lower inversion position is set as the reference position (in this embodiment, the position of the fifth axis L5 is also at the upper inversion position. A reference drive in which the first motor 11 is driven by the control unit 41 and the wiping range of the first wiper blade 36 in a state where the fifth axis L5 is at the reference position is the reference range Z1; The first and second motors 11 and 12 are driven to move the fifth axis L5 above the front window 1 above the reference position, so that the wiping range of the first wiper blade 36 is larger than the reference range Z1. The mode is switched to the enlarged drive in the range Z2. Therefore, a wide range can be variably wiped by the reference drive and the enlargement drive. In other words, the trajectory on the base end side of the first wiper blade 36 is also enlarged by the enlargement drive alone, and the base end of the trajectory is not wiped. However, by switching to the reference drive, the enlargement range Z2 and the Both ranges of the reference range Z1 including the base end are wiped, and a wide range can be variably wiped.

  (5) The controller 41 controls the drive of the second motor 12 so that the enlarged drive is performed when the first wiper blade 36 moves forward, and the reference drive is performed when the first wiper blade 36 moves backward. Therefore, a wide range can be variably wiped by the reference drive and the enlargement drive for each reciprocation.

  (6) When the second motor 12 and the second drive lever 29 are in a state where the fifth axis L5 is at the reference position, even if a rotational force is applied to the second drive lever 29, the rotation shaft 12a of the second motor 12 is They are connected via a link mechanism (the second drive crank arm 14, the third connecting rod 31, and the second passenger seat side swing lever 28) set to be a dead center that cannot be rotated. Therefore, the fifth axis L5 can be mechanically held at the reference position without generating a holding torque in the second motor 12. Therefore, it is not necessary to energize the second motor 12 at the time of the reference drive, and for example, low power consumption can be achieved. Further, for example, even when the second motor 12 fails, the reference driving can be performed.

  (7) Since the first drive lever 26 is rotated within a range below the front axis 1 with respect to the first axis L1, for example, the first drive lever 26, the second drive lever 29, It is possible to make it difficult to see the first driven lever 32 and the base end of the arm head 33 (the part that constitutes the second driven lever).

  (8) Since 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, the first axis L1 and the second axis L2 are shifted from each other. The mounting area as viewed from the axial direction can be reduced as compared with the case where they are arranged at the same position.

  (9) The length from the first axis L1 to the third axis L3 is set to be the same as the length from the fourth axis L4 to the fifth axis L5, and the length from the third axis L3 to the fifth axis L5 is the same. The length from the first axis L1 to the fifth axis L5 is set to be the same as the length up to the fourth axis L4. Accordingly, a link mechanism having a parallelogram shape in which the first drive lever 26 and the arm head 33 are parallel and the second drive lever 29 and the first driven lever 32 are parallel is provided. Therefore, for example, if the second drive lever 29 and the first driven lever 32 are folded so as to be close to each other at the stop position as in the present embodiment, the space occupied at the stop position can be made extremely small. Can be accommodated in a small space below the front window 1.

The above embodiment may be modified as follows.
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. As shown in FIG. 14, a configuration may be employed in which the first axis L1 of the first drive lever 61 and the second axis L2 of the second drive lever 62 are displaced from each other. Even in this case, when the first driving lever 61 is rotated by the driving force of the first motor to perform the wiping operation by the first wiper blade, the second driving lever 62 is switched to the driving force of the second motor. By rotating the first wiper blade to move the fifth axis L5 on the tip side upward, the wiping range of the first wiper blade can be enlarged. Also, with this configuration, the first drive lever 61 and the second drive lever 62 can be supported with a simpler configuration than in the above embodiment.

  In the above-described embodiment, the second wiper arm 17 that is driven by the driving force of the first motor 11 and is connected to the distal end of the second wiper blade 18 for wiping the front window 1 is provided. The present invention is not limited to this. For example, a configuration may be adopted in which a motor for driving the second wiper arm 17 is separately provided. Further, for example, a vehicle wiper device that does not include the second wiper arm 17 and the second wiper blade 18 may be used. In these cases, the first motor 11 is driven and connected to the first drive lever 26 without the intervention of the second connection rod 27 or the like.

  The control unit 41 for controlling the driving of the first motor 11 and the second motor 12 in the above embodiment may be mounted as a vehicle-side ECU, or at least one of the first motor 11 and the second motor 12, for example, A control motor mounted on the second motor 12 may be used.

  In the above embodiment, of the first motor 11 and the second motor 12, the second motor 12 is controlled to be rotatable forward and backward. However, the present invention is not limited to this. A control motor that can be used may be used, or both the first motor 11 and the second motor 12 may be control motors that can rotate forward and backward.

  In the above embodiment, the control unit 41 switches between the reference drive and the enlargement drive. However, the present invention is not limited to this. For example, a control unit that performs only the enlargement drive may be used. In addition, the control unit performs switching so that enlarged driving is performed at the time of forward movement and reference driving is performed at the time of backward movement.However, the control unit is not limited thereto. The switching may be performed so that the enlargement drive is performed. Further, for example, the reference drive and the enlargement drive may be switched every one reciprocation. In the above embodiment, the reference drive and the enlargement drive are switched, and two types of patterns are driven (the reference range Z1 and the enlargement range Z2 are wiped). You may make it drive by switching. For example, the range between the reference range Z1 by the reference drive and the enlargement range Z2 by the enlargement drive is variably enlarged and wiped (the trajectory of the tip of the first wiper blade 36 is intermediate between the reference drive and the enlargement drive). You may make it switch including drive.

  The control unit 41 of the above embodiment is based on a rotation position signal (drive state signal) corresponding to the rotation position (rotation angle) of the rotation shafts 11a, 12a input from the first motor 11 and the second motor 12, respectively. Drive control of the first motor 11 and the second motor 12, respectively, based on a rotation position signal (drive state signal) corresponding to the rotation position (rotation angle) of the rotation shaft 11a input from the first motor 11. Even when the drive of the second motor 12 is controlled, the first wiper arm 35 can be extended and contracted by the extension and contraction mechanism corresponding to the pivoting operation of the first wiper arm 35 by the pivoting mechanism.

  In the above embodiment, the second motor 12 and the second drive lever 29 are connected to the link mechanism (the second drive crank arm 14, the second drive crank arm 14, Although the connection is performed via the third connection rod 31 and the second passenger seat side swing lever 28), the connection is not limited thereto, and the connection may be performed without using the link mechanism.

In the above embodiment, the first drive lever 26 is rotated in a range below the first axis L1. However, the first drive lever 26 is configured to rotate in a range above the first axis L1. Is also good.
In the above embodiment, the length from the first axis L1 to the third axis L3 is set to be the same as the length from the fourth axis L4 to the fifth axis L5, and the third axis 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, but may be changed to different lengths.

  In the above-described embodiment, not only the enlargement drive but also the reference drive are alternately performed, so that the unwiped area inside the locus of the base end of the first wiper blade 36 at the time of the enlargement drive (when variably enlarged) is obtained. Although it is eliminated, the present invention is not limited to this. For example, the unwiped area may be reduced or eliminated by a second wiper blade.

  For example, as shown in FIG. In this example (see FIG. 15), the second wiper blade 71 is in the lower turning position (stop position) and is shifted from the first wiper blade 72 (passenger seat side) in the vehicle width direction (driver's seat side). ), And is arranged such that the tip side thereof overlaps the base end side of the first wiper blade 72 in the vertical direction along the surface of the front window 1. In other words, the wrap that overlaps in the vertical direction along the surface of the front window 1 in a state where the distal end side of the second wiper blade 71 and the proximal end side of the first wiper blade 72 are at the lower inversion position (stop position). It is set to have a range W. Thereby, when the wiping range by the first wiper blade 72 is variably expanded (that is, when the wiping range is expanded (Z4)), the remaining unwiped range can be reduced or eliminated.

  In this example (see FIG. 15), the second wiper blade 71 is set such that the wiping range H2 includes the entire movement locus X of the base end of the first wiper blade 72. More specifically, the control unit 41 of this example controls the driving of the first motor 11 and the second motor 12 so that the enlarged drive of the above-described embodiment is always performed when the first wiper blade 72 moves forward and backward. The wiping range of the first wiper blade 72 is set to an enlarged range Z4 that is larger than the reference range Z3 regardless of the forward movement or the backward movement. The wiping range H2 of the second wiper blade 71 includes the entire movement trajectory X of the base end of the first wiper blade 72 when the enlargement drive is performed (however, the lower turning position of the second wiper blade 71 is reversed). The length and the lap range W are set so as to exclude the movement locus of a portion below the (stop position). This makes it possible to eliminate the remaining wiping range inside the wiping range (that is, the enlarged range Z4) by the first wiper blade 72.

  Further, in this example (see FIG. 15), the enlarged range Z4, which is the wiping range by the first wiper blade 72, includes the functional area Z5 in the front window 1 used by the camera 73 as the wiping surface using device. Is set. That is, in the vehicle of this example, a pair of cameras 73 for front recognition is fixed to the ceiling in the room, and the range imaged by the cameras 73 is the functional area Z5 in the front window 1. The reference range Z3 by the first wiper blade 72 includes only a part of the functional area Z5, but the enlarged range Z4 is set to include the entire functional area Z5. Therefore, in this example, the entire functional area Z5 can be wiped, and the camera 73 (the forward recognition function by the camera 73) can be used favorably. The device using the wiping surface is not limited to the camera 73, but may be another device such as a raindrop sensor.

  In the above embodiment, the swing mechanism (swing link mechanism) is configured by the first drive lever 26, the first driven lever 32, and the arm head 33. The configuration may be changed to another configuration as long as the first wiper arm 35 can be reciprocated by being driven by the driving force.

  In the above-described embodiment, the telescopic mechanism (axis moving mechanism) is configured by the second drive lever 29, but the first wiper arm 35 is driven by the driving force of the second motor 12 fixed to the vehicle body to extend its length. If it can be expanded and contracted in the direction, it may be changed to another configuration.

  DESCRIPTION OF SYMBOLS 1 ... Front window (wiping surface), 11 ... 1st motor (1st drive source), 12 ... 2nd motor (2nd drive source), 12a ... Rotation shaft of 2nd motor, 14 ... Link mechanism Second drive crank arm, 17: second wiper arm, 18, 71: second wiper blade, 26, 61: first drive lever, which constitutes a part of the swing mechanism and swing link mechanism, 28: link mechanism , A second passenger lever (29, 62...) A second drive lever (expansion and contraction mechanism and a shaft moving mechanism), 31... A third connecting rod forming a part of a link mechanism, 32. A first driven lever constituting a part of the moving mechanism and the oscillating link mechanism; 33 ... an arm head (second driven lever) constituting a part of the oscillating mechanism and the oscillating link mechanism; 35 ... a first wiper arm; , 72 ... first wiper blade, DESCRIPTION OF SYMBOLS 1 ... Control part, 73 ... Camera (wiping surface use apparatus), L1 ... 1st axis, L2 ... 2nd axis, L3 ... 3rd axis, L4 ... 4th axis, L5 ... 5th axis, X ... Movement locus, Z1, Z3: Reference range, Z2, Z4: Enlarged range, Z5: Function area.

Claims (6)

A first drive source fixed to the vehicle body;
A first drive lever whose base end is supported rotatably about a first axis at a fixed position with respect to the vehicle body and which is rotated forward and reverse by the driving force of the first drive source;
A second driven lever that is rotated with the rotation of the first drive lever,
A first wiper arm including the second driven lever as an arm head at a base end, and a first wiper blade connected to a tip end for reciprocating wiping between a vertically inverted position of a wiping surface of a vehicle;
An oscillating link mechanism configured to include the first driving lever and the second driven lever and driven by a driving force of a first driving source to reciprocally oscillate the first wiper arm;
A second drive source fixed to the vehicle body separately from the first drive source;
A second drive lever whose base end is supported rotatably about a second axis at a fixed position with respect to the vehicle body and which is rotated forward and reverse by the driving force of the second drive source;
The first drive source is driven to swing the first wiper arm by the swing link mechanism , and the second drive source is driven to rotate the second drive lever in the forward and reverse directions by driving the second drive source. A control unit that controls the driving of the first driving source and the second driving source so that the pivot center axis of the second driven lever at the tip end side of the driving lever approaches or moves away from the upper corner of the wiping surface. A vehicle wiper device comprising: The vehicle wiper device according to claim 1,
A vehicle wiper device, comprising: a second wiper arm driven by a driving force of the first drive source, and a second wiper arm connected to a distal end portion for wiping the wiping surface. The vehicle wiper device according to claim 1 or 2 ,
Before KiYurado link mechanism further includes a first driven lever pivotably base end side is connected about a third axis at the tip side of the front Symbol first drive lever,
The second driven lever has a base end connected to be rotatable around a fourth axis line at the front end of the first driven lever, and the swing center shaft at the front end of the second drive lever. vehicle wiper apparatus characterized by rotatably distal end is connected about a fifth axis as. The vehicle wiper device according to any one of claims 1 to 3 ,
A second wiper arm driven in synchronization with the first wiper arm and having a second wiper blade for wiping the wiping surface connected to a tip end;
The second wiper blade is disposed at a position that is shifted from the first wiper blade in the vehicle width direction in a state where the second wiper blade is at the lower turning position, and the distal end thereof is located at the base end side of the first wiper blade and the wiping surface. A vehicle wiper device which is arranged so as to overlap in a vertical direction along the direction. The vehicle wiper device according to claim 4 ,
The vehicle wiper device according to claim 2, wherein the wiping range of the second wiper blade is set so as to include the entire movement locus of the base end of the first wiper blade. The vehicle wiper device according to any one of claims 1 to 5 ,
A vehicle wiper device, wherein a wiping range of the first wiper blade is set to include a functional area on the wiping surface used by a wiping surface using device.

Images