JP2008018900A - Wiper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper device in which at least one of a pair of wiper blades is moved from the inversion position to the stop position set on the outer side from a wiping range and stopped when the operation is stopped, a wiper arm and the wiper blades are reliably stopped at the stop position in a stable posture, and the appearance when the operation is stopped can be enhanced. <P>SOLUTION: In the wiper device W, a pair of wiper arms 20, 60 facing each other and connected to pivots 13, 53 are reciprocally turned in the directions opposite to each other, a surface of a glass 1 is wiped by wiper blades 30, 70 connected to a fore end of each wiper arm in a reciprocally-facing manner, and the wiper arm 20 is moved from the lower inversion position P1a to the storage and stop position P1c set on the outer side of the wiping range P1 when the wiper device is stopped. The wiper device has a moving mechanism 100 for moving the wiper arm 20 between the lower inversion position P1a and the storage and stop position P1c in a substantially parallel manner. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a wiper device, and more particularly, to a wiper device that reciprocates a window of a vehicle.

  2. Description of the Related Art Conventionally, there has been known an opposing wiping type wiper device configured such that a pair of wiper arms (wiper arms and blades) are reciprocally rotated in opposite directions to wipe wiping surfaces in an opposing manner. In such a counter-wiping type wiper device, the wiper blades are arranged in parallel at the lower inversion position (or stop position) so as to have overlapping portions in the longitudinal direction, so that the inversion at the start of wiping or at the lower inversion position During operation, both wiper blades may interfere with each other in the vicinity of the lower reverse position (or stop position). In order to prevent such interference, the wiper device of the opposite wiping type has to dispose both wiper blades at the lower inverted position, which impairs the appearance of the vehicle when wiping is stopped or during wiping operation. .

In order to improve such inconvenience, in the counter-wiping wiper device described in Patent Document 1, one wiper blade is set at a predetermined interval above the lower inversion position of the other wiper blade during the reciprocating wiping operation. It is configured to rotate at a lower reversing position, and when the operation is stopped, it further rotates to a stop position set near the lower reversing position of the other wiper blade.
That is, in this wiper device, the stop position of one wiper blade is set below the lower reverse position, and when the operation is stopped, only one wiper blade is rotated further downward to the other wiper blade. Store in close proximity. Thereby, in this wiper device, appearance at the time of operation stop is improved.

  In the wiper device described in Patent Document 1, when wiping is started, the other wiper blade located on the lower side is in a standby state, and the one wiper blade located on the upper side is moved from the stop position to the lower inverted position. The wiping operation is started after a gap in the wiping direction is provided between the wiper blades. Thereby, even if both wiper blades are arranged to overlap each other in the reverse position or the stop position, they can be started without interference.

Japanese Patent No. 28888651

However, in the wiper device described in Patent Document 1, when one wiper arm (wiper arm & blade) is stored from the lower inversion position to the stop position, the wiper arm is rotated and stored around the pivot shaft that is the rotation center. The
However, when the wiper arm is configured to rotate when retracted in this way, slight rotation of the wiper arm results in a large amount of movement and movement speed at the tip of the wiper blade, and when the wiper arm is stopped, the pair of wiper blades are moved. It has been extremely difficult to stably arrange them close to each other in a parallel state.

  In view of the above problems, an object of the present invention is to provide a wiper device in which at least one of a pair of wiper blades moves from a reverse position to a stop position set outside the wiping range and stops when operation is stopped. An object of the present invention is to provide a wiper device capable of reliably stopping a blade at a stop position in a stable posture and improving the appearance when the operation is stopped.

  In order to achieve the above object, the present invention reciprocally drives a pair of wiper arms connected to a pivot shaft in opposite directions, and wipes the wiping surface by a wiper blade connected to the tip of each wiper arm. And a wiper device that stops and moves at least one of the pair of wiper arms from a reverse position to a stop position set further outside the reciprocating wiping range than the reverse position, wherein the wiper arm is reversed. A moving mechanism is provided for moving in parallel between the position and the stop position.

  As described above, the wiper device of the present invention has a moving mechanism that moves at least one of a pair of wiper arms to which a wiper blade for reciprocating wiping is connected is moved substantially in parallel between a reverse position and a stop position while maintaining its posture. It has. By providing this moving mechanism, for the wiper arm and blade that moves between the reverse position and the stop position, the movement amount and movement speed of the base end portion of the wiper arm and the movement amount and movement speed of the tip portion of the wiper blade are approximately Can be equivalent. Accordingly, by moving the wiper blade in a parallel state at the time of stopping, a stable stopping posture is ensured, and the operation gives a high-class feeling.

In the present invention, the moving mechanism is connected to a wiper motor that rotationally drives the wiper arm, and is driven by the rotational driving force of the wiper motor.
In the present invention configured as described above, since the moving mechanism is driven by the driving force of the wiper motor without using a dedicated driving source, the wiper arm is moved substantially in parallel between the reverse position and the stop position. In addition, the entire apparatus can be configured at low cost and the mountability of the apparatus can be improved.

  Further, in the present invention, the pair of wiper blades are arranged in parallel in the width direction with overlapping portions in the longitudinal direction at the stop position, provided corresponding to each of the pair of wiper arms, and connected to each wiper arm. A pair of cover portions respectively covering the upper surface portions of the wiper blades, and the pair of cover portions cover the upper surfaces continuously in the longitudinal direction of the pair of wiper blades arranged in parallel at the stop position. It is characterized by being formed.

  In the present invention configured as described above, a pair of cover portions covering the upper surface portions of the pair of wiper blades are provided corresponding to each of the pair of wiper arms, and the overlapping portion of the pair of wiper blades at the stop position is provided. Are configured to cooperate and be covered by a pair of cover portions. That is, the upper surface portions of the pair of wiper blades arranged in parallel are continuously covered in the longitudinal direction by these cover portions. Thereby, for example, when the wiper arms are continuously arranged in the vehicle width direction at the stop position, the presence of the pair of wiper arms is not only reduced by the continuous arrangement in the vehicle width direction, but also the wiper blade Further, since the cover portion is continuously covered in the vehicle width direction, the presence is almost erased, and the wiper device as a whole has a sense of unity with the vehicle design.

  Further, in the present invention, the pair of wiper blades are arranged in parallel in the width direction and having overlapping portions in the longitudinal direction in a state where one of the wiper blades is positioned closer to the reciprocating wiping range side than the other in the stop position, Is characterized in that it is provided only in the wiper arm connected to the wiper blade located on the reciprocating wiping range side at the stop position in the pair of wiper arms.

  In the present invention configured as described above, only the wiper arm connected to the wiper blade located on the reciprocating wiping range side at the stop position is moved from the reverse position to the stop position by the moving mechanism at the time of stop, and thereby both wiper blades Can be placed close to each other at the stop position. At this time, since the moving wiper blades move substantially in parallel, both wiper blades can be stably placed close to each other in a parallel state when stopped. Further, by arranging both wiper blades close to each other in parallel, the appearance of the vehicle when the wiper device is stopped can be improved.

  Further, in the present invention, the stop position is set on the side opposite to the reciprocating wiping range than the reversal position on the side where the pair of wiper blades are separated from each other, and the moving mechanism is provided in each of the pair of wiper arms. It is characterized by being.

In general, a pair of wiper blades that perform a counter-wiping operation do not interfere with each other near the stop position when the stop position is set on the reverse position where they are separated from each other. During operation, there is a risk of overrunning from the reverse position to the outside due to traveling wind or the like and interfering with a frame structure (for example, an A pillar of a vehicle) that supports the wiping surface.
However, in the present invention, the stop position is set outside the reversal position, and when stopping, the wiper arm & blade is moved substantially in parallel by the moving mechanism to stop along the frame structure, and during the wiping operation, from the stop position. Also, the reversing operation can be performed at the reversing position set inside. Accordingly, in the present invention, it is possible to prevent the wiper blade from interfering with the frame structure in the stop operation and the reverse wiping operation.

  In the present invention, the moving mechanism may be rotated at one end by a first link having one end fixed to the pivot shaft and a first connecting shaft substantially parallel to the pivot shaft at the other end of the first link. And a second link fixed to the wiper arm and disposed substantially parallel to the first link, and a second connection shaft that is substantially parallel to the first connection shaft at the other end of the second link. A third link having one end pivotably connected to the second link, and a third link that is disposed substantially parallel to the second link, and is substantially parallel to the second connection shaft at the other end of the third link. One end of the first link is pivotally connected, and the other end of the first link is pivotally connected to one end of the first link by a fourth connection shaft that is substantially parallel to the third connection shaft and coaxial with the pivot shaft. The biasing force is applied in a direction in which the fourth link, the second connecting shaft, and the fourth connecting shaft are brought close to each other. And the pivot shaft is rotated so that the wiper arm is disposed at a predetermined position slightly closer to the stop position than the reversal position, and when the predetermined position is reached, the fourth link rotates around the pivot shaft. A stopper for preventing rotation of the pivot mechanism, and the moving mechanism is configured such that the pivot shaft is further rotated to the stop position side while the fourth link is prevented from rotating by the stopper. The wiper arm moves away from the second connecting shaft and the fourth connecting shaft against the biasing force of the biasing means, and the second link moves substantially parallel to the fourth link. Are moved substantially in parallel.

  In the present invention configured as described above, the wiper arm is connected to the pivot shaft via the moving mechanism, and the moving mechanism is configured to operate by the rotational driving force of the pivot shaft. In the present invention, the moving mechanism includes a four-bar rotation mechanism including a first link to a fourth link, and the four-bar rotation mechanism is connected to the second connecting shaft and the fourth link by an urging force by the urging means during a normal reciprocating wiping operation. The connecting shafts form parallelograms that are close to each other, but during a stop operation, they are deformed so as to be rectangular against the urging force of the urging means, and this deformation can move the wiper arm substantially in parallel. it can.

In the invention, it is preferable that the urging means is a tension spring that is locked in the vicinity of the second connecting shaft of the second link and in the vicinity of the fourth connecting shaft of the fourth link.
In the present invention configured as described above, the urging means is a tension spring, so that the axial dimension of the pivot shaft of the urging means can be kept small and a simple structure can be achieved.

  Further, in the present invention, the biasing means has a rotational torque applied around the pivot shaft when a wiping load in a wiping start direction assumed in advance is applied to the wiper blade, and the second connecting shaft and the fourth connecting shaft. The biasing force is set so as to extend the distance between the connecting shafts.

  In the present invention configured as described above, the four-bar rotation mechanism including the first link to the fourth link is assumed to be applied to the wiper blade in a normal wiping operation by appropriately setting the urging force by the urging means. It is prevented from being deformed by a wiping load in the wiping start direction. Thereby, in this invention, the behavior of the wiper arm and wiper blade at the time of normal wiping can be stabilized.

In the present invention, the pivot shaft is an output shaft of a wiper motor that can rotate forward and reverse.
In the present invention configured as described above, the reciprocating rotation by the pivot shaft during the wiping operation and the rotation for the stop movement during the stopping operation can be easily configured by setting the forward / reverse angle of the wiper motor. The rotation angle can be set easily on the software side without requiring any mechanical change.

  In the present invention, the moving mechanism is rotatably held by a moving member fixed coaxially with the pivot shaft and a support shaft substantially parallel to the pivot shaft, and rotates the moving member. A ring member having an inner peripheral surface that can be slid without being moved, and is coaxially arranged with the ring member and is rotationally driven by a wiper motor with the support shaft as a rotation center, and the pivot shaft is rotatable A rotating member that holds the moving member in contact with the inner circumferential surface of the ring member in a state where the rotating member is supported on the ring member, and connects the rotating member and the link member when the rotating member is within a predetermined rotation angle range. A fixing member, and the moving mechanism rotates the moving member when the rotating member rotates in a state where the rotating member and the ring member are not connected by the fixing member. Without being held in sliding contact with the inner peripheral surface of the ring member, and the rotating member rotates integrally with the ring member in a state where the rotating member and the ring member are connected by the fixing member. In some cases, the moving member is rotated around the support shaft together with the ring member.

  In the present invention configured as described above, the pivot shaft is fixed to the moving member, and the wiper arm connected to the pivot shaft moves substantially in parallel by the parallel movement of the moving member, and reciprocating wiping by the rotation of the moving member. It is possible to perform an operation. That is, in the moving mechanism of the present invention, in a state where the rotating member and the ring member are not coupled, when the rotating member is rotated by the wiper motor, the moving member does not rotate but is brought into sliding contact with the inner peripheral surface of the ring member. The moving member, the pivot shaft, and the wiper arm move together as a unit. On the other hand, in a state where the rotating member and the ring member are connected, when the rotating member rotates together with the ring member by the wiper motor, the moving member rotates around the support shaft together with the ring member. Along with the movement, the moving member, the pivot shaft and the wiper arm rotate together.

  According to the present invention, in a wiper device in which at least one of a pair of wiper blades moves from a reverse position to a stop position set outside the wiping range and stops when operation is stopped, the wiper arm and the wiper blade are in a stable posture. It is possible to reliably stop at the stop position and improve the appearance when the operation is stopped.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The members, arrangements, and the like described below are not intended to limit the present invention and can be variously modified within the scope of the gist of the present invention.
1 to 9 relate to an embodiment of the present invention. FIGS. 1 to 3 are general explanatory views of the wiper device (upper reverse position, lower reverse position, storage stop position), and FIG. FIG. 5 is an explanatory diagram of the wiper arm, wiper blade and cover part of the wiper device of FIG. 1, and FIG. 6 is the lower inverted position (A) and retracted stop position (B) of the wiper device of FIG. FIG. 7 is an end view of the CC line in FIG. 6, FIG. 8 is a perspective view of the movement mechanism of the wiper device in FIG. 1, and FIG. 9 is a movement mechanism of the wiper device in FIG. FIG.

FIG. 10 is an explanatory diagram of each wiper mechanism at the upper reversal position (A) and the storage stop position (B) of the wiper device according to another embodiment of the present invention.
FIGS. 11 to 13 are general explanatory views of a wiper device (upper reverse position, lower reverse position, storage stop position) according to another embodiment of the present invention, and FIG. 14 is an electrical configuration diagram of the wiper device.
15 to 17 relate to another embodiment of the present invention, FIG. 15 is an explanatory diagram of a moving mechanism of the wiper device, FIG. 16 is an explanatory diagram of an operation of the moving mechanism of FIG. 15, and FIG. It is decomposition | disassembly explanatory drawing of a moving mechanism.

  As shown in FIGS. 1-3, the wiper apparatus W for vehicles which concerns on one Embodiment is a wiper apparatus of the opposing wiping type which wipes the surface of the front window glass 1 (henceforth "glass 1") of a vehicle reciprocatingly. There is a pair of wiper mechanisms W1, W2. The wiper mechanisms W1 and W2 are disposed on both sides in the width direction of the vehicle.

The wiper mechanism W1 is connected to a wiper motor 10 mounted near the lower right corner of the substantially rectangular glass 1, a wiper arm 20 having a base end fixed to the wiper motor 10, and a distal end portion of the wiper arm 20 so as to be rotatable. The main component is the wiper blade 30 and the cover 40 that covers the wiper arm 20 and the upper surface side (reverse wiping surface side) of the wiper blade 30.
The wiper mechanism W2 is rotatably connected to a wiper motor 50 attached near the lower left corner of the glass 1, a wiper arm 60 having a base end fixed to the wiper motor 50, and a distal end portion of the wiper arm 60. The main component is a wiper blade 70 and a cover portion 80 that covers the wiper arm 60 and the upper surface side (reverse wiping surface side) of the wiper blade 70.

  The wiper mechanisms W1 and W2 are configured to reciprocately wipe the wiping ranges P1 and P2 shown in FIG. 1 by the wiper blades 30 and 70, respectively. The wiping range P1 is a substantially fan-shaped wiping range in which ends in the circumferential direction are defined by the lower inversion position P1a and the upper inversion position P1b. The wiping range P2 is a substantially fan-shaped wiping range in which ends in the circumferential direction are defined by the lower inversion position P2a and the upper inversion position P2b. FIG. 1 shows a state where the wiper mechanisms W1 and W2 have moved to the upper inversion positions P1b and P2b, respectively. FIG. 2 shows a state in which the wiper mechanisms W1 and W2 have moved to the lower inversion positions P1a and P2a, respectively.

Since the wiper device W of this example is a counter-wiping type, the rotation direction in which the wiper arm 20 operates from the lower inversion position P1a to the upper inversion position P1b, and the wiper arm 60 from the lower inversion position P2a to the upper inversion position P2b. The direction of rotation that operates is the opposite direction.
In this example, the lower inversion position P1a is positioned above the vehicle relative to the lower inversion position P2a. When the wiper arms 20 and 60 are reversed in the vicinity of the lower edge of the glass 1, the wiper arm 20 is on the upper side (wiping). The wiper arm 60 is located on the lower side (outside of the wiping range or wiping surface edge side). Accordingly, in the vicinity of the lower inversion positions P1a and P2a, when performing the wiping operation from the lower inversion positions P1a and P2a toward the upper inversion positions P1b and P2b, the wiper blade 30 comes before the wiper blade 70. Thus, when operating in the reverse direction, the wiper blade 70 precedes the wiper blade 30.

  Thus, in this example, since the lower inversion positions P1a and P2a are set with a predetermined interval in the wiping operation direction, an external load is applied to the wiper mechanisms W1 and W2 during the reciprocating wiping operation, and the wiping operation timing is Even if they are displaced, the wiper blades 30 and 70 are prevented from interfering with each other.

FIG. 3 shows a state where the wiper device W is in the storage stop position. In the wiper mechanism W2 of this example, the lower inversion position P2a is the storage stop position P2c (= P2a), but in the wiper mechanism W1, the lower outside of the wiping range P1 is the storage stop position P1c with respect to the lower inversion position P1a. Yes. The storage stop position P1c is located slightly above the storage stop position P2c (about the width of the wiper blade 30), but substantially coincides therewith. Therefore, as will be described later, when the storage is stopped, the wiper blades 30 and 70 have the overlapping portion R in the longitudinal direction and are arranged in parallel in the width direction (see FIG. 6).
The wiper mechanism W1 includes a moving mechanism 100 as will be described later. The moving mechanism 100 is a mechanism that moves the wiper arm 20 and the wiper blade 30 substantially in parallel between the storage stop position P1c and the lower inversion position P1a.

The wiper motor 10 of this example includes a motor unit 11 formed of a DC electric motor, and a gear unit 12 that decelerates the rotational output from the motor unit 11 and transmits it to the pivot shaft 13. In addition, the wiper motor 50 includes a motor unit 51 formed of a DC electric motor, and a gear unit 52 that decelerates the rotational output from the motor unit 51 and transmits it to the pivot shaft 53.
As shown in FIG. 4, the wiper motors 10 and 50 of this example are configured to operate independently of each other in response to a drive signal from the controller 90. The controller 90 is connected to the wiper switch 91 and the position detectors 14 and 54 disposed in the motor units 11 and 51, respectively. The position detectors 14 and 54 are magnet sensors provided in the armatures of the motor units 11 and 51, respectively, and send position signals (pulse signals) to the controller 90 according to the rotation of the armatures. The controller 90 counts the pulse signals to detect the rotation number of the armature and the rotation angle of the pivot shafts 13 and 53 (that is, the wiper arms 20 and 60).

The controller 90 controls the wiper motors 10 and 50 in synchronization by receiving an operation signal from the wiper switch 91. That is, the controller 90 sends drive signals to the wiper motors 10, 50 so that the wiper arms 20, 60 wipe back and forth within the wiping ranges P1, P2 at a predetermined rotational speed, rotate them forward and backward, and rotate the pivot shaft. 13 and 53 are reciprocally rotated.
In this example, the wiper motor 10 is connected to the wiper arm 20 via the moving mechanism 100. On the other hand, in the wiper motor 50, the base end portion of the wiper arm 60 is directly connected to the pivot shaft 53.

As shown in FIG. 5A, the wiper arm 20 of this example includes an arm head 21, a retainer 23 rotatably connected to the arm head 21 by a connection pin 22, and an arm fixed to the tip of the retainer 23. And a piece 25. Further, as shown in FIG. 5B, the wiper arm 60 of this example is fixed to the arm head 61, a retainer 63 rotatably connected to the arm head 61 by a connecting pin 62, and a tip of the retainer 63. Arm piece 65.
The wiper blades 30 and 70 of this example are tournament-type wiper blades, and hooks 26 and 66 formed at the tip portions of the arm pieces 25 and 65 are connected to connection pins 31 and 71 (not shown). By being engaged with the apparatus, the wiper arms 20 and 60 are rotatably connected.

Next, the cover parts 40 and 80 of this example will be described.
The cover portion 40 of this example covers a part of the upper surface portion of the wiper arm 20 and the upper surface portion of the wiper blade 30. The cover portion 80 covers a part of the upper surface portion of the wiper arm 60 and the upper surface portion of the wiper blade 70. Here, the upper surface portion refers to a surface (anti-wiping surface) opposite to the surface facing the glass 1. In this example, the cover portions 40 and 80 are integrally extended from the distal end portions of the retainers 23 and 63 having a substantially U-shaped cross section whose lower portions are opened, so that the height decreases toward the distal end side. Is formed. The cover portions 40 and 80 cover the upper surface portion so that the arm pieces 25 and 65 are accommodated therein. The cover portions 40 and 80 may be configured separately from the retainers 23 and 63 and attached to the wiper arms 20 and 60. The cover portions 40 and 80 may be attached to the wiper blades 30 and 70, respectively. The structure which can be attached may be sufficient.

FIG. 6A shows a state in which the wiper blades 30 and 70 are at the lower inversion positions P1a and P2a, respectively. In this state, the wiper blades 30 and 70 have overlapping portions R in the longitudinal direction and are arranged in parallel in the width direction.
The cover portion 40 of this example extends from the vicinity of the distal end portion of the retainer 23 over the coupling pin 31 of the wiper blade 30 to between the coupling pin 31 and the distal end portion (in the middle of the overlapping portion R). The wiper blade 30 of this example is disposed substantially parallel to the extending direction A1 of the wiper arm 20 and the cover portion 40, but is shifted upward by a predetermined distance. For this reason, the upper surface portion of the wiper blade 30 is covered by a range closer to the side opposite to the wiper blade 70 side (upper half on the paper surface) in the range of the cover portion 40 in the width direction B1.

On the other hand, the cover portion 80 extends from the vicinity of the distal end portion of the retainer 63 over the coupling pin 71 of the wiper blade 70 to the space between the coupling pin 71 and the distal end portion (in the middle of the overlapping portion R). The wiper blade 70 of this example is disposed substantially parallel to the extending direction A2 (A2 is substantially parallel to A1) of the wiper arm 60 and the cover portion 80, but is shifted downward by a predetermined distance. For this reason, the upper surface portion of the wiper blade 70 is covered by the range of the cover portion 80 in the width direction B2 (B2 is substantially parallel to B1) and on the opposite side to the wiper blade 30 side (lower half on the paper surface). It has been broken.
Further, the front end portion 41 of the cover portion 40 is formed such that the lower corner portion is cut off at a predetermined inclination angle, and the front end portion 81 of the cover portion 80 is formed such that the upper corner portion is cut off at a predetermined inclination angle. ing.
In this example, the cover portions 40 and 80 are the same component and are arranged symmetrically on the left and right lines. In this example, the parts are shared.

FIG. 6B shows a state where the wiper blade 30 has moved to the storage stop position P1c. At this time, the cover portions 40 and 80 are opposed to each other with the tip portions 41 and 81 spaced apart by a slight distance X in the longitudinal direction, and are in a linearly continuous state as a whole, and exhibit an integrated appearance.
In this state, the wiper blades 30 and 70 have the overlapping portion R in the longitudinal direction as in the case of the lower inversion positions P1a and P2a, and are further wider than those in the case of the lower inversion positions P1a and P2a. They are arranged in parallel close to the direction (B1, B2). In this example, the wiper blades 30 and 70 are arranged in parallel in a substantially parallel state. However, the wiper blades 30 and 70 are not necessarily arranged in parallel in a strictly parallel state.

At this time, a portion of the wiper blade 70 that protrudes from the tip of the cover portion 80 (a portion that is not covered by the cover portion 80) is closer to the wiper blade 70 side (on the paper surface) in the range in the width direction B1 of the cover portion 40. Covered by the lower half) range. In addition, a portion of the wiper blade 30 that protrudes from the tip of the cover portion 40 (a portion that is not covered by the cover portion 40) is closer to the wiper blade 30 side (upward on the paper surface) in the width direction B2 of the cover portion 80. Covered by half) range.
FIG. 7 is an end view taken along line CC of FIG. As shown in FIG. 7, the cover portion 80 can cover the upper surface portions of the wiper blades 30 and 70.
Thus, in this example, the cover parts 40 and 80 are comprised so that the upper surface part may be continuously covered over the substantially full length of the wiper arms 20 and 60 and the wiper blades 30 and 70 in cooperation.

  Further, the cover part 40 and the cover part 80 are formed so that the front end parts 41 and 81 are cut off at the same inclination angle, and form an undercut shape in the width direction (B1, B2). When the portion 40 moves from above toward the storage stop position P1c, the tip portions 41 and 81 do not easily interfere with each other, and the interval between the tip portions 41 and 81 can be narrowed and arranged closer to each other. That is, when the tip portions 41 and 81 are formed so as to be orthogonal to the longitudinal direction, it is necessary to set a certain distance in the longitudinal direction in consideration of interference between the tip portions 41 and 81. However, since the tip portions 41 and 81 have an undercut shape as in this example, the distance between the tip portions 41 and 81 can be set substantially narrow.

  When the wiper device W is held in the storage stop position in this way, in this example, the pair of wiper arms 20 and 60 and the wiper blades 30 and 70 are continuously arranged in the vehicle width direction, and the presence of these wipers is confirmed. It is reduced by the continuous arrangement in the vehicle width direction. Further, in this example, the wiper blades 30 and 70 are continuously covered in the vehicle width direction by the cover portions 40 and 80, so that the presence is almost erased, and the wiper device W as a whole has a sense of unity with the vehicle design. Is obtained.

Next, the structure of the moving mechanism 100 of this example is demonstrated based on FIG.
The moving mechanism 100 of this example includes a first link (crank arm) 101, a second link 102, a third link 103, a fourth link 104, a stopper 105, and a tension spring (biasing means) 106. It is prepared for.
The first link 101 is connected and fixed to the pivot shaft 13 so that the base end side thereof cannot rotate, and is configured to be directly driven by the rotational driving force of the wiper motor 10. One end side of the second link 102 is rotatably connected to the tip end side of the first link 101 by the first connecting shaft 111. One end side of the third link 103 is rotatably connected to the other end side of the second link 102 by the second connecting shaft 112. One end side of the fourth link 104 is rotatably connected to the other end side of the third link 103 by the third connecting shaft 113, and the other end side is connected to the proximal end side of the first link 101 and the fourth connecting shaft 114. Are pivotally connected.

  The pivot shaft 13, the first connecting shaft 111, the second connecting shaft 112, the third connecting shaft 113, and the fourth connecting shaft 114 are set in parallel in the axial direction. In this example, the first link 101 and the second connecting shaft 114 are set. A four-bar rotation mechanism 100 a is formed by the link 102, the third link 103, and the fourth link 104. In particular, in this example, the first link 101 and the third link 103, the second link 102 and the fourth link 104 are set substantially parallel to each other, and the distance between the first connecting shaft 111 and the second connecting shaft 112 is set. The distance between the third connecting shaft 113 and the fourth connecting shaft 114 is equal to the distance between the second connecting shaft 112 and the third connecting shaft 113, and the fourth connecting shaft 114 and the first connecting shaft 111. The distance between the axes is equal. Therefore, the four-joint rotation mechanism 100a of this example forms a parallelogram or a rectangle. However, the present invention is not limited to this, and the four-bar rotation mechanism 100a may be configured to form other than a parallelogram or a rectangle.

  In this example, the pivot shaft 13 and the fourth connecting shaft 114 are coaxial, and the axial center of the pivot shaft 13 and the axial center of the fourth connecting shaft 114 coincide. The pivot shaft 13 is fixed to the first link 101, but can be rotated with respect to the fourth link 104. Therefore, the fourth link 104 is not directly interlocked with the rotation of the pivot shaft 13.

The second link 102 is formed with an extending portion 102a that extends further beyond the first connecting shaft 111 provided on one end side, and the arm head 21 of the wiper arm 20 is formed on the extending portion 102a. Yes. In this example, the wiper arm 20 is attached to the extending portion 102a so that the extending direction thereof is substantially orthogonal to the extending direction of the extending portion 102a.
Further, on the other end side of the second link 102, a locking hole 102 b for locking one end of the tension spring 106 is formed at a portion beyond the second connecting shaft 112.

In the fourth link 104, a contact portion 104a extends from the one end side beyond the third connecting shaft 113. Further, a stopper 105 is provided on the gear portion 12 of the wiper motor 10 so that the pivot shaft 13 can come into contact with the contact portion 104a at a predetermined rotation angle.
Further, on the other end side of the fourth link 104, a locking hole 104 b for locking the other end of the tension spring 106 is formed at a portion beyond the fourth connecting shaft 114.

  Both ends of the tension spring 106 are locked in the locking hole 102b of the second link 102 and the locking hole 104b of the fourth link 104, respectively, and the second connecting shaft 112 and the fourth connecting shaft 114 are always brought close to each other. As described above, a predetermined urging force is applied to the four-joint rotation mechanism 100a. Thereby, it hold | maintains so that a substantially parallelogram may be made (refer FIG. 8). In this substantially parallelogram state, the distance between the second connecting shaft 112 and the fourth connecting shaft 114 is shorter than the distance between the first connecting shaft 111 and the third connecting shaft 113. In this example, by using the tension spring 106 as the biasing means, the axial dimension of the pivot shaft 13 is kept small, and the moving mechanism 100 has a simple and compact configuration.

  Further, when a wiping load is applied to the wiper blade 30 in a state where the pivot shaft 13 is rotating in the counter wiping range direction (clockwise, see FIG. 9A), the wiping operation is restricted. Due to the rotational torque acting around the pivot shaft 13, an external force is applied to the tension spring 106 to extend it. In this example, such a possible wiping start direction Vb wiping load is set in advance, and the urging force of the tension spring 106 is set so that the tension spring 106 does not expand even when this set wiping load is applied. . Therefore, in this example, the tension spring 106 does not expand during the normal reciprocating wiping operation, and the behavior of the wiper arm 20 and the wiper blade 30 is stabilized by the four-bar rotation mechanism 100a maintaining the steady state shape. Is done.

  In this example, the flattened degree of the parallelogram of the four-node rotation mechanism 100a is defined by the length of the tension spring 106 in a natural state. However, the present invention is not limited to this, and the four-node rotation mechanism 100a is deformed. When the first link 101 and the third link 103 are in contact with each other in the width direction, or the second link 102 and the fourth link 104 are in contact with each other in the width direction, the flatness of the parallelogram is reduced. It may be specified.

  In this example, the tension spring 106 is used as the urging means, but the second connecting shaft 112 and the fourth connecting shaft 114 are brought close to each other (or the first connecting shaft 111 and the third connecting shaft 113 are connected). As long as the urging force can be applied to the four-bar rotation mechanism 100a (so as to keep away), the present invention is not limited to this. For example, a locking portion may be provided in the vicinity of the first connecting shaft 111 and the third connecting shaft 113, and both ends of the compression spring may be attached to the locking portion. Further, a torsion spring may be used instead of the tension spring or the compression spring. In this case, for example, a torsion spring is disposed around the second connecting shaft 112, one end thereof is attached to the second link 102, and the other end is attached to the third link 103. The second link 102 can be urged to rotate clockwise while the third link 103 is urged to rotate counterclockwise. Thereby, it is possible to apply an urging force to the four-joint rotation mechanism 100a so that the second connecting shaft 112 and the fourth connecting shaft 114 are brought close to each other. The torsion spring may be provided on the first connecting shaft 111, the third connecting shaft 113, and the fourth connecting shaft 114 in addition to the second connecting shaft 112.

Next, based on FIG. 9, operation | movement of the moving mechanism 100 of this example is demonstrated. Hereinafter, a reciprocating wiping operation and a transition operation from the reciprocating wiping position to the storage stop position will be described. Note that the transition operation from the storage stop position to the wiping operation position is the reverse of the transition operation from the reciprocating wiping position to the storage stop position, and thus description thereof is omitted.
In FIG. 9A, the controller 90 sends a drive signal to continuously operate the wiper mechanism W1, and the wiper blade 30 reciprocally wipes the wiping range P1 in the range of the lower inversion position P1a and the upper inversion position P1b. It shows the state. At this time, in the moving mechanism 100, the four-joint rotation mechanism 100a forms a parallelogram in which the second connecting shaft 112 and the fourth connecting shaft 114 are brought close to each other by the biasing force of the tension spring 106 as described above. .

FIG. 9B shows a state in which the contact portion 104a of the fourth link 104 contacts the stopper 105 while the four-bar rotation mechanism 100a holds the parallelogram. In this example, the wiper blade 30 is set to be slightly closer to the storage stop position P1c than the lower inversion position P1a at this time, and the wiper arm 20 and the wiper blade 30 are in a state of facing the horizontal direction.
In this way, the position immediately before the contact portion 104a contacts the stopper 105 corresponds to the lower inversion position P1a, so that the contact portion 104a does not frequently contact the stopper 105 during normal reciprocating wiping. It can be set as the more preferable structure which prevented generation | occurrence | production of the sound.

When the operation of the wiper mechanism W1 is stopped from the state where the wiper mechanism W1 is operating (FIG. 9A), the controller 90 moves the pivot shaft 13 from the state shown in FIG. 9B to the anti-wiping range direction Va. A drive signal is sent to the wiper motor 10 so as to be rotated by a predetermined angle (clockwise in FIG. 9).
When the pivot shaft 13 rotates in the counter wiping range direction Va, the first link 101 fixed to the pivot shaft 13 swings in the counter wiping range direction (clockwise) as the pivot shaft 13 rotates. Further, the third link 103 swings in the same direction around the third connecting shaft 113 so as to keep parallel to the first link 101 in conjunction with the rotation of the first link 101.

  At this time, the rotation of the fourth link 104 is restricted because the contact portion 104 a is in contact with the stopper 105. Therefore, as the first link 101 and the third link 103 rotate, the four-joint rotation mechanism 100a is displaced from a state where a parallelogram is formed to a state where a rectangle is formed. Along with this displacement, the distance between the second connecting shaft 112 and the fourth connecting shaft 114 increases, so that the tension spring 106 is extended. In other words, the four-bar rotation mechanism 100a is displaced in a rectangular shape against the tensile force of the tension spring 106.

When displaced in this way, the second link 102 connected to the first link 101 and the third link 103 translates in the anti-wiping range direction so as to keep parallel to the fourth link 104. The wiper arm 20 and the wiper blade 30 connected to the second link 102 move in parallel while maintaining a horizontal posture.
FIG. 9C shows a state where the wiper blade 30 has moved to the storage stop position P1c. In this example, at this time, the four-joint rotation mechanism 100a once becomes a rectangle and is further deformed to form a parallelogram.

  As described above, the moving mechanism 100 of the present example stably and parallelly keeps the wiper arm 20 and the wiper blade 30 in a horizontal posture from the lower inversion position P1a to the storage stop position P1c as the pivot shaft 13 rotates. Can be moved. That is, at the time of the stop operation from the lower inversion position P1a to the storage stop position P1c, the wiper arm 20 and the wiper blade 30 move stably with the same moving distance and moving speed between the distal end portion and the proximal end portion. It is possible to ensure a stable stopping posture.

  Further, in this example, since the moving mechanism 100 is operated by the rotational driving force of the wiper motor 10 without using a dedicated drive source for driving the moving mechanism 100, the wiper device W can be made inexpensive. It can be configured and can be easily mounted on a vehicle.

Further, in this example, the controller 90 rotates the wiper motor 10 forward and backward at a predetermined angle by servo control, thereby rotating the pivot shaft 13 and the wiper arm 20 back and forth at a predetermined rotation angle. Further, in this example, when the controller 90 rotates the wiper motor 10 by a predetermined angle further outward from the reciprocating wiping range, the moving mechanism 100 operates to move the wiper arm 20 and the wiper blade 30 substantially horizontally. it can.
Therefore, in this example, the reciprocating rotation during the reciprocating wiping operation and the predetermined rotation for the stopping operation can be easily set on the controller 90 side. Also, these setting changes of the rotation angle can be dealt with by software changes in the controller 90 without requiring mechanical changes.

In this example, the four-bar rotation mechanism 100a forms a parallelogram at the storage stop position P1c. However, the present invention is not limited to this and may be set to form a rectangle. By appropriately setting in this way, the parallel movement distance can be easily set to a desired value.
Further, the moving mechanism 100 of this example is configured to be driven by the wiper motor 10, and when the moving mechanism 100 moves the wiper arm 20 in parallel, it is preferable to operate the wiper motor 10 at a relatively low rotational speed. . If comprised in this way, in the storage stop operation | movement, the moving speed of the cover parts 40 and 80 will become low speed, it will prevent colliding with the cover part 80 by an inertial force, and the cover part 40 will be moved stably. be able to.

  In the above-described embodiment, the moving mechanism 100 is disposed only on the wiper mechanism W1. However, the present invention is not limited thereto, and the moving mechanism 100 may be disposed on the wiper mechanism W2. Thus, by disposing the moving mechanism 100 in the pair of wiper mechanisms W1 and W2, the storage stop positions P1c and P2c are maintained while the wiper arms 20 and 60 and the wiper blades 30 and 70 are held in a horizontal state during the storage operation. Can be moved to.

Hereinafter, another embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the same component as the said embodiment, and the overlapping description is abbreviate | omitted.
In the above embodiment, the wiper arm 20 and the wiper blade 30 are configured to stop at the stop position P1c set to the lower outside of the lower inversion position P1a. However, the present invention is not limited to this, and as shown in FIG. In addition, it may be configured to stop at the storage stop position P1d set on the upper outer side than the upper inversion position P1b. In the present example, the wiper arm 60 and the wiper blade 70 are also configured to stop at a stop position P2d set on the upper outer side than the upper reversal position P2b. These storage stop positions P1d and P2d are set substantially parallel to the frame (A pillar) 2 that supports the glass 1.

FIG. 10A shows a state where the wiper blades 30 and 70 have reached the upper reversal positions P1b and P2b, respectively, and FIG. 10B shows that the wiper blades 30 and 70 have reached the storage stop positions P1d and P2d, respectively. Indicates the state.
The wiper mechanism W2 includes the same moving mechanism 100 as in the above embodiment. However, in the wiper mechanism W2 of this example, unlike the above embodiment, the stopper 105 is disposed at a position that restricts the rotation of the fourth link 104 when the wiper blade 70 reaches the upper reversal position P2b. . In this example, the wiper mechanism W1 is configured symmetrically with the wiper mechanism W2 in the vehicle width direction.

  With this configuration, the wiper motors 10 and 50 are rotated by the drive signal from the controller 90, respectively, and after the wiper blades 30 and 70 reach the upper reverse positions P1b and P2b, the wiper motors 10 and 50 are further moved. When it rotates by a predetermined angle, the moving mechanism 100 operates. As a result, the wiper arm 20 and the wiper blade 30, and the wiper arm 60 and the wiper blade 70 move in parallel to the upper reversal positions P1b and P2b and substantially parallel to the storage stop positions P1d and P2d set on the outer side in the vehicle width direction, respectively. .

  At this time, the wiper arm 20 and the wiper blade 30 and the wiper arm 60 and the wiper blade 70 move stably with the same moving distance and moving speed at the upper and lower ends, so that they are stopped along the frame structure and stored during the wiping operation. The reversing operation can be performed at the upper reversing positions P1b and P2b set inside the stop positions P1d and P2d. Thereby, in this example, it is possible to prevent the wiper blades 30 and 70 from interfering with the frame structure in the stop operation and the reverse wiping operation.

In the above embodiment, the wiper arms 20 and 60 are independently driven by the separate wiper motors 10 and 50. However, the present invention is not limited thereto, and the wiper arms 20 and 60 may be configured as in the examples shown in FIGS. Good.
The wiper device W of this example includes a pair of wiper arms 20 and 60, a pair of wiper blades 30 and 70, a pair of cover portions 40 and 80, and a moving mechanism 100 similar to those in the above embodiment. Further, the wiper apparatus W includes a wiper motor 200 and a link mechanism 210 instead of the wiper motors 10 and 50 of the above-described embodiment.

The wiper motor 200 of the present example is an electric motor configured to swing the pair of wiper arms 20 and 60 by rotating in one direction. An electric motor configured to swing the wiper arms 20 and 60 may be used.
The link mechanism 210 of this example includes a crank arm 211, a rod 212, a bell crank 213, a rod 214, a rod 215, a rise-up motor 216, a crank arm 217, a segment lever 218, a rod 219, a pivot lever 220, a pivot shaft 221 and a pivot. A lever 222 and a pivot shaft 223 are provided.
The rise-up motor 216, the crank arm 217, and the segment lever 218 constitute a rise-up mechanism 224.

The crank arm 211 has a base end portion fixed to the output shaft 201 of the wiper motor 200 and a tip end portion rotatably connected to one end of the rod 212 by a ball joint 231. The other end of the rod 212 is rotatably connected to one end of the bell crank 213 via a ball joint 232. Further, one end of a rod 214 is rotatably connected to the ball joint 232.
The bell crank 213 is rotatably supported by a support shaft 233 supported by the vehicle. One end of a rod 215 is rotatably connected to the other end of the bell crank 213 via a ball joint 234.

The other end of the rod 214 and one end of the rod 219 are connected via a segment lever 218 of the rise-up mechanism 224.
The tip of the pivot lever 220 is rotatably connected to the other end of the rod 219 via a ball joint 238. The proximal end portion of the pivot lever 220 is fixed to the lower portion of the pivot shaft 221, and the moving mechanism 100 (first link 101) is attached to the distal end portion of the pivot shaft 221. Therefore, when the pivot lever 220 is operated and the pivot shaft 221 is reciprocally rotated, the wiper arm 20 swings through the moving mechanism 100.

  The tip of the pivot lever 222 is rotatably connected to the other end of the rod 215 via a ball joint 239. The base end portion of the pivot lever 222 is fixed to the lower portion of the pivot shaft 223, and the wiper arm 60 is attached to the distal end portion of the pivot shaft 223. Therefore, when the pivot lever 222 operates and the pivot shaft 223 reciprocates, the wiper arm 60 swings.

  The rise-up mechanism 224 can be displaced to two positions: a wiping operation position (see FIGS. 11 and 12) and a storage stop position (see FIG. 13). The wiper arm 20 can wipe the wiping range P1 when the rise-up mechanism 224 is at the wiping operation position, and can move to the storage stop position P1c when the rise-up mechanism 224 is at the storage stop position.

In the rise-up mechanism 224, the base end portion of the crank arm 217 is fixed to the output shaft 216a of the rise-up motor 216, and the base end portion of the segment lever 218 rotates via the ball joint 237 to the tip end portion of the crank arm 217. Connected as possible.
Two connecting portions are formed at the distal end portion of the segment lever 218 so as to be spaced apart from each other in the circumferential direction, and ball joints 235 and 236 are disposed at the connecting portions. The other end of the rod 214 is connected to the segment lever 218 via the ball joint 235, and one end of the rod 219 is connected to the segment lever 218 via the ball joint 236.

  As shown in FIG. 14, the wiper motor 200 and the rise-up motor 216 of this example are configured to operate in response to a drive signal from the controller 290. The controller 290 is connected to the wiper switch 291 and position detectors 200a and 216b disposed in the wiper motor 200 and the rise-up motor 216, respectively. The position detectors 200a and 216b are magnet sensors similar to the position detectors 14 and 54 of the above embodiment.

  The controller 290 receives the operation signal from the wiper switch 291 and controls the wiper motor 200 and the rise-up motor 216 in a predetermined sequence. That is, when receiving an operation signal from the storage stop state, the controller 290 first operates the rise-up motor 216 to displace the crank arm 217 from the storage stop position to the wiping operation position (this shifts from FIG. 13 to FIG. 12). To do). When the controller 290 determines that the crank arm 217 is displaced from the storage stop position to the wiping operation position based on the pulse signal from the position detector 216b, the controller 290 sends a drive signal to the wiper motor 200 to operate the wiper motor 200. As a result, the wiper arms 20 and 60 swing.

  When the operation signal from the wiper switch 291 disappears (or when an OFF signal is received) during such continuous operation, the controller 290 moves the crank arm 211 to the lower inversion position P1a based on the pulse signal from the position detector 200a. , P2a is stopped at a rotation angle position (see FIG. 12). When the controller 290 determines that the crank arm 211 has stopped at the rotation angle position corresponding to the lower inversion positions P1a and P2a, the controller 290 displaces the rise-up motor 216 from the wiping operation position to the storage stop position (FIG. 12 to FIG. 12). 13).

Next, based on FIGS. 11-13, operation | movement of the wiper apparatus W of this example is demonstrated.
FIG. 11 shows a state where the wiper arms 20 and 60 are moved to the upper inversion positions P1b and P2b, respectively, as in FIG. FIG. 12 shows a state in which the wiper arms 20 and 60 have moved to the lower inversion positions P1a and P2a, respectively, as in FIG. FIG. 13 shows a state where the wiper arm 20 has moved to the storage stop position P1c as in FIG.

As shown in FIGS. 11 and 12, when the rise-up mechanism 224 is in the wiping operation position, first, when the wiper motor 200 is actuated and the crank arm 211 is rotated in one direction, the crank arm 211 is rotated to rotate the rod. 212 moves forward and backward. By the operation of the rod 212, the bell crank 213 swings around the support shaft 233 as a rotation center.
When the bell crank 213 swings, the rod 214 connected to one end side and the rod 215 connected to the other end side move forward and backward in the left-right direction.

The segment lever 218 swings around the ball joint 237 by the forward and backward movement of the rod 214, and the rod 219 moves forward and backward by this swing. At this time, the rise-up motor 216 of the rise-up mechanism 224 is in an operation stop state, and the crank arm 217 remains stopped.
When the left and right rods 219 and 215 move forward and backward in this way, the pivot levers 220 and 222 swing within a predetermined angle range due to the forward and backward movement. As a result, the wiper arms 20 and 60 swing, and the wiper blades 30 and 70 wipe the glass 1 back and forth within the wiping ranges P1 and P2.

On the other hand, when the wiper arms 20 and 60 are moved to the storage stop position, first, the wiper motor 200 stops operating with the wiper arms 20 and 60 positioned at the lower inversion positions P1a and P2a as shown in FIG.
In this state, when the rise-up motor 216 is operated and the crank arm 217 is rotated clockwise to move from the wiping operation position to the storage stop position, the rod 219 is further pushed rightward of the vehicle. As a result, the pivot lever 220 rotates clockwise by a predetermined angle, and the moving mechanism 100 operates in the same manner as in the above-described embodiment, and the wiper arm 20 moves parallel to the storage stop position P1c. Thus, when the wiper arm 20 moves in parallel, the cover portions 40 and 80 are continuously arranged in the vehicle width direction as shown in FIG.

As described above, a pair of wiper arms 20 and 60 can be reciprocally rotated by one wiper motor 200 and link mechanism 210 without providing a wiper motor corresponding to each of the pair of wiper arms 20 and 60.
In the example of FIGS. 11 to 14, only the wiper arm 20 is configured to move in parallel during the storage stop operation. However, the invention is not limited thereto, and both the wiper arm 20 and the wiper arm 60 are moved in parallel during the storage stop operation. You may comprise. In this case, the wiper motor 200 is reciprocally wiped by rotating it forward and backward at less than 180 degrees, and at the time of stopping, as a motor that stops rotating beyond its forward / reverse rotation angle, the riser mechanism 224 is not provided, and the rods 214 and 219 It is good also as a structure which connected directly. Further, a rise-up mechanism may be provided on the wiper arm 60 side.

In the above embodiment, the moving mechanism 100 has the four-node rotating mechanism 100a. However, the moving mechanism 100 is not limited to this, and may be configured as shown in FIGS. 15 and 16 are front views of the moving mechanism 300 of this example, and FIG. 17 is an exploded partial sectional view.
The moving mechanism 300 of this example includes a moving member 310 that is a substantially regular octagonal plate member, a substantially cylindrical ring member 320, a columnar rotating member 330 that is substantially the same diameter as the ring member 320, and a restraining member 340. The lock members (fixing members) 350 and 360 are main components.

The moving member 310 includes eight circumferential planes 311 and a substantially octagonal side surface 312. In this example, the pivot shaft 370 is fixed to the wiper arm 20 so as not to rotate. The pivot shaft 370 is fixed to the moving member 310 so that the end of the pivot shaft 370 passes through the side surface 312 coaxially. Yes.
In the ring member 320, the inner peripheral surface of the cylindrical main body 321 has a two-stage configuration in the axial direction. On the inner peripheral surface of the main body 321, a circumferential surface 322 is formed in the upper stage, and a sliding contact surface 323, which is a substantially regular octagonal inner peripheral surface composed of a plurality of peripheral planes 323 a, is formed in the lower stage. The slidable contact surface 323 is for slidably contacting the circumferential plane 311 of the moving member 310, and the axial height of the slidable contact surface 323 is set larger than the thickness of the moving member 310. In this example, the inner shape dimension of the circumferential surface 322 and the maximum inner diameter dimension of the sliding contact surface 323 are set to be substantially the same.

Further, in a predetermined angle range of the circumferential surface 322, step portions 322a and 322b projecting radially inward are formed at a predetermined angle in the circumferential direction, and the step portions 322a and 322b are engaged with each other. A groove 322c is formed.
On the sliding contact surface 323, an arm portion 324 is formed to project radially inward from a predetermined angular position. A disc-shaped support portion 325 in which an insertion hole 326 for inserting a support shaft 301 described later is formed is formed at the distal end portion of the arm portion 324. The insertion hole 326 is formed coaxially with the axial center of the main body 321. The ring member 320 is rotatable with respect to the support shaft 301 in a state where the support shaft 301 is inserted into the insertion hole 326.
Further, on the outer peripheral surface of the main body 321, two convex portions 327 a and 327 b are formed to protrude in the circumferential direction at a predetermined interval over the axial length, and an engagement groove portion is formed between these convex portions 327 a and 327 b. 327c.

The rotating member 330 has a cylindrical main body portion 331 having the same diameter as the main body portion 321 of the ring member 320, and is in sliding contact with the lower portion of the ring member 320.
An insertion hole 331 a for inserting the support shaft 301 is formed in the center of the main body 331. The rotating member 330 is rotatable about the support shaft 301 in a state where the support shaft 301 is inserted through the insertion hole 331a.
A meshing tooth 332 that meshes with the worm 10Ab attached to the output shaft 10Aa of the wiper motor 10A is formed on the lower stage of the outer peripheral surface of the main body 331 in the circumferential direction. The worm 10Ab and the rotating member 330 constitute a worm gear.

On the upper stage of the outer peripheral surface of the main body portion 331, a flange portion 333 is formed that protrudes by a predetermined height outward in the radial direction over about a half circumference.
Further, a moving groove 334 having a long hole shape when viewed from above is formed on the upper surface of the main body portion 331 and into which the lower end portion of the pivot shaft 370 penetrating the moving member 310 is inserted. The moving groove 334 is formed along the radial direction, and both end portions are formed in a semicircular shape having substantially the same diameter as the pivot shaft 370. The pivot shaft 370 inserted into the moving groove 334 formed in this way can move in the radial direction of the rotating member 330 together with the moving member 310 and can rotate in the moving groove 334. Yes.

The restraining member 340 is a plate-like member, and has an insertion hole 341 for inserting the support shaft 301 and a long hole 342 for inserting the pivot shaft 370. The long hole 342 has substantially the same outer shape as the moving groove 334. In the holding member 340, the pivot shaft 370 is inserted into the elongated hole 342 in the upper part of the moving member 310, and the moving member 310 is sandwiched between the rotating member 330 and held in the lower stage inside the ring member 320.
Further, the holding member 340 includes an urging means (compression spring) 343. In this example, the urging means 343 is disposed in the elongated hole 342 and urges the pivot shaft 370 outward in the radial direction. Due to this biasing force, the moving member 310 is elastically in contact with the sliding contact surface 323 of the ring member 320.

  The holding member 340, the ring member 320, and the rotating member 330 are stacked in this order, and are fixed to the vehicle in the insertion hole 341 of the holding member 340, the insertion hole 326 of the ring member 320, and the insertion hole 331a of the rotating member 330. The support shaft 301 is inserted and integrated.

The lock member 350 is disposed on the upper surface of the main body 331 of the rotating member 330. The lock member 350 includes a support shaft 351 erected on the upper surface of the main body portion 331, an engagement piece 352 rotatably disposed on the support shaft 351, and a biasing force for biasing the engagement piece 352. A biasing means (compression spring) 353 is provided. The urging means 353 urges the end portion 352a out of the end portions 352a and 352b of the engagement piece 352 radially outward.
The engagement piece 352 is normally urged to rotate so that the end portion 352a abuts on the circumferential surface 322 of the ring member 320, and the end portion 352b is higher than the height of the stepped portion 322a than the circumferential surface 322. (See FIG. 15A). In this example, when the rotating member 330 rotates relative to the ring member 320 and the end portion 352a rides on the stepped portion 322a, the engaging piece 352 is centered on the support shaft 351 against the urging force. And the end 352b engages with the engaging groove 322c (see FIG. 16A).
When the end portion 352b is engaged with the engaging groove portion 322c, the rotating member 330 and the ring member 320 are integrally fixed.

  The lock member 360 is fixed with respect to the vehicle and extends coaxially with the support shaft 301, an engagement piece 362 rotatably disposed on the support shaft 361, and the engagement piece 362. A biasing means (compression spring) 363 for dynamically biasing is provided. The engaging piece 362 has end portions 362 a and 362 b that are shifted in the axial direction of the support shaft 361, the end portion 362 a is positioned at the same height as the flange portion 333 of the rotating member 330, and the end portion 362 b is a ring. It is located at the same height as the member 320. The urging means 363 urges the end 362a inward in the radial direction among the ends 362a and 362b of the engagement piece 362.

The engagement piece 362 is normally in a state in which the end portion 362a rides on the flange portion 333 of the ring member 320 and the end portion 362b engages with the engagement groove portion 327c by being urged to rotate. (See FIG. 15A). In this state, the ring member 320 is fixed so as not to rotate by the lock member 360.
In this example, when the rotating member 330 rotates relative to the ring member 320 and the end portion 362a comes into sliding contact with the peripheral surface of the main body portion 331 instead of the flange portion 333, the engagement piece is caused by the biasing force. 362 rotates around the support shaft 361, and the engagement between the end 362b and the engagement groove 327c is released (see FIG. 16A).

  In this example, the end portion 352b of the lock member 360 and the engagement groove portion 327c are disengaged from each other at substantially the same time, so that the end portion 352b of the lock member 350 is engaged with the engagement groove portion 322c. The member 330 and the ring member 320 can be rotated integrally (see FIG. 16A).

Next, the operation of the moving mechanism 300 of this example will be described.
FIG. 15A shows a state where the wiper arm 20 is at the storage stop position P1c. At this time, the lock member 350 is not engaged with the engagement groove portion 322c, and the lock member 360 is engaged with the engagement groove portion 327c. Therefore, the rotating member 330 can rotate, but the ring member 320 cannot rotate.
The moving member 310 is urged radially outward by the urging means 343 with the wiper arm 20 held in the horizontal direction, and the corner portion sandwiched between the two circumferential planes 311 has two circumferential planes of the ring member 320. Engage so as to be pressed against the corner between 323a.

When the wiper motor 10A rotates in a predetermined direction to move the wiper arm 20 to the wiping range side from the state of FIG. 15A, the worm 10Ab rotates. Since the worm 10Ab meshes with the meshing teeth 332 of the rotating member 330, when the worm 10Ab rotates, the rotating member 330 starts to rotate in the wiping start direction (counterclockwise in FIG. 15).
Since the ring member 320 is fixed and stopped by the lock member 360, when the rotating member 330 rotates, the moving member 310 is slidably contacted with the slidable contact surface 323 of the ring member 320 together with the rotating member 330. Moving.

As the rotating member 330 rotates, the moving member 310 elastically slidably contacts the slidable contact surface 323 while moving in the radial direction against the urging force of the urging means 343. At this time, the end 352 a of the engagement piece 352 is in sliding contact with the circumferential surface 322, and the end 362 a of the engagement piece 362 is in sliding contact with the flange 333.
In FIG. 15B, the rotation member 330 is rotated by a rotation angle (approximately 45 degrees in this example) corresponding to one of the circumferential plane 323 a of the sliding contact surface 323, and the moving member 310 is the sliding contact surface 323. The state which moved to the corner | angular part adjacent to is shown. Even if the moving member 310 slides in this way, the outer shape of the moving member 310 and the inner shape of the sliding contact surface 323 of the ring member 320 are similar octagons and similar shapes. Move without rotating. In addition, in this example, both were formed in the substantially regular octagon, However, Not only this but a regular hexagon, a regular decagon, etc. may be sufficient.

  Thus, when the rotating member 330 is rotated approximately 180 degrees from the state of FIG. 15A, the state shown in FIG. 16A is obtained. In the state shown in FIG. 16A, the wiper arm 20 reaches the lower inversion position P1a. When the rotation member 330 rotates approximately 180 degrees, the end 352a of the lock member 350 rides on the step 322a, so that the engagement piece 352 rotates and the end 352b engages with the engagement groove 322c. Thereby, the rotating member 330 and the ring member 320 are fixed by the lock member 350.

Further, at this time, the end portion 362a of the engagement piece 362 of the lock member 360 reaches the end portion of the flange portion 333 that has been in sliding contact. As a result, the engagement piece 362 moves to the outer peripheral surface of the main body portion 331 whose end portion 362a is lower than the flange portion 333, and the end portion 362b is lifted to disengage from the engagement groove portion 327c. When the lock member 360 is disengaged, the ring member 320 can rotate together with the rotation member 330.
When the rotating member 330 is further rotated by the wiper motor 10A in a state where the ring member 320 and the rotating member 330 are fixed, the moving member 310 does not slide on the sliding contact surface 323 of the ring member 320, and the ring member Rotate around support shaft 301 together with 320.

In FIG. 16B, the moving member 310 is rotated integrally with the ring member 320 in this way, and the wiper arm 20 connected to the moving member 310 via the pivot shaft 370 has reached the upper inversion position P1b. Indicates the state.
Thereafter, the wiper motor 10A reciprocally rotates at a predetermined rotation angle, so that the wiper arm 20 is positioned between a lower inversion position P1a shown in FIG. 16A and an upper inversion position P1b shown in FIG. Reciprocates.

  Further, when the stop operation is performed from the lower inversion position P1a (FIG. 16A) toward the storage stop position (FIG. 15A), the wiper motor 10A is predetermined in the storage direction from the state of FIG. When rotation of the angle is started, first, the end portion 362a of the engagement piece 362 of the lock member 360 rides on the flange portion 333, the end portion 362b engages with the engagement groove portion 327c, and the ring member 320 cannot be rotated. At the same time, the engagement between the end 352b of the engagement piece 352 of the lock member 350 and the engagement groove 322c is released, and only the rotation member 330 becomes rotatable.

  When the wiper motor 10A further rotates from this state, only the rotating member 330 rotates approximately 180 degrees. At this time, the moving member 310 moves substantially in parallel while sliding with the sliding surface 323 of the ring member 320. Finally, the storage stop position P1c shown in FIG.

It is a whole explanatory view of the wiper device (upside inversion position) concerning one embodiment of the present invention. It is a whole explanatory view of the wiper device (lower inversion position) concerning one embodiment of the present invention. It is a whole explanatory view of the wiper device (storage stop position) concerning one embodiment of the present invention. It is an electrical block diagram of the wiper apparatus of FIG. It is explanatory drawing of the wiper arm of the wiper apparatus of FIG. 1, a wiper blade, and a cover part. It is explanatory drawing of the wiper arm, wiper blade, and cover part in the lower inversion position (A) and storage stop position (B) of the wiper apparatus of FIG. It is the CC sectional view taken on the line of FIG. It is a perspective view of the moving mechanism of the wiper apparatus of FIG. It is operation | movement explanatory drawing of the moving mechanism of the wiper apparatus of FIG. It is explanatory drawing of each wiper mechanism in the upper inversion position (A) and storage stop position (B) of the wiper apparatus which concerns on other embodiment of this invention. It is a whole explanatory view of the wiper device (upside inversion position) concerning other embodiments of the present invention. It is a whole explanatory view of the wiper device (lower inversion position) concerning other embodiments of the present invention. It is a whole explanatory view of the wiper device (storage stop position) concerning other embodiments of the present invention. It is an electrical block diagram of the wiper apparatus which concerns on other embodiment of this invention. It is explanatory drawing of the moving mechanism of the wiper apparatus which concerns on other embodiment of this invention. It is operation | movement explanatory drawing of the moving mechanism of FIG. FIG. 16 is an exploded explanatory view of the moving mechanism of FIG. 15.

Explanation of symbols

1. Windshield glass, 2. Frame, 10, 50, 10A Wiper motor,
10Aa ··· output shaft, 10Ab ··· worm, 11, 51 ··· motor section,
12, 52 ... gear part, 13, 53 ... pivot shaft, 14, 54 ... position detector,
20, 60 Wiper arm, 21, 61 Arm head, 22, 62 Connecting pin,
23, 63 ... Retainer, 25, 65 ... Armpiece, 26, 66 ... Hook,
30, 70 ... wiper blade, 31, 71 ... connecting pin, 40, 80 ... cover part,
41, 81 ... tip, 90 ... controller, 91 ... wiper switch,
100 ... Movement mechanism, 100a ... Four-bar rotation mechanism, 101 ... First link,
102 ... 2nd link, 102b ... Locking hole, 102a ... Extension part, 103 ... 3rd link,
104 ... 4th link, 104b ... Locking hole, 104a ... Contact part, 105 ... Stopper,
106 ... tension spring, 111 ... first connecting shaft, 112 ... second connecting shaft,
113 ... 3rd connecting shaft, 114 ... 4th connecting shaft, 200 ... wiper motor,
200a Position detector, 201 Output shaft, 210 Link mechanism
211 crank arm 212, 214, 215, 219 rod
213, bell crank, 216, rise-up motor, 216a, output shaft,
216b Position detector, 217 Crank arm, 218 Segment lever,
220, 222 Pivot lever, 221, 223 Pivot shaft,
224 Rise-up mechanism 231, 232, 234 to 239 Ball joint,
233 ... support shaft, 290 ... controller, 291 ... wiper switch,
300 ... moving mechanism, 301 ... support shaft, 310 ... moving member, 311 ... circumferential plane,
312... Side surface, 320... Ring member, 321.
322a, 322b ... stepped portion, 322c ... engagement groove portion, 323 ... sliding contact surface,
323a ··· circumferential plane, 324 · arm portion, 325 · support portion, 326 · insertion hole,
327a, 327b ... convex part, 327c ... engagement groove part, 330 ... rotating member,
331 ... body part, 331a ... insertion hole, 332 ... meshing teeth, 333 ... collar part,
334 ... Moving groove, 340 ... Holding member, 341 ... Insertion hole, 342 ... Long hole,
343, biasing means, 350, lock member, 351, support shaft, 352, engagement piece,
352a, 352b ... end, 353 ... biasing means, 360 ... lock member (fixing member),
361 ... support shaft, 362 ... engagement piece, 362a, 362b ... end, 363 ... biasing means,
370 Pivot shaft, P1, P2 Wiping range, P1a, P2a Lower inverted position,
P1b, P2b, upper reversal position, P1c, P2c, P1d, P2d, storage stop position,
W wiper device, W1, W2 wiper mechanism

Claims (10)

A pair of wiper arms connected to the pivot shaft are driven to reciprocate in opposite directions, and the wiping surfaces are reciprocally opposed to and wiped by a wiper blade connected to the tip of each wiper arm. A wiper device that moves one stop position from the reversal position to a stop position set outside the reciprocating wiping range further than the reversal position,
A wiper device comprising a moving mechanism for moving the wiper arm substantially in parallel between the reversal position and the stop position.   The wiper device according to claim 1, wherein the moving mechanism is connected to a wiper motor that rotationally drives the wiper arm, and is driven by a rotational driving force of the wiper motor. The pair of wiper blades are arranged in parallel in the width direction with overlapping portions in the longitudinal direction at the stop position,
A pair of cover portions provided corresponding to each of the pair of wiper arms, each covering a top surface portion of a wiper blade connected to each wiper arm;
3. The wiper according to claim 1, wherein the pair of cover portions are formed so as to continuously cover the upper surfaces of the pair of wiper blades arranged in parallel in the stop position. apparatus. The pair of wiper blades are arranged side by side in the width direction and have overlapping portions in the longitudinal direction in a state where one is positioned closer to the reciprocating wiping range than the other at the stop position,
The said moving mechanism is provided only in the wiper arm with which the wiper blade located in the reciprocating wiping range side in the said stop position was connected among the said pair of wiper arms. The wiper device according to 1. The stop position is set on the counter-reciprocating wiping range side than the reversal position on the side where the pair of wiper blades are located apart from each other,
The wiper device according to claim 1, wherein the moving mechanism is provided in each of the pair of wiper arms. The moving mechanism is
A first link having one end fixed to the pivot shaft;
A second link fixed to the wiper arm, with one end rotatably connected to the other end of the first link by a first connecting shaft substantially parallel to the pivot shaft;
A third link disposed substantially parallel to the first link and having one end rotatably connected to the other end of the second link by a second connection shaft substantially parallel to the first connection shaft;
One end of the third link is pivotally connected to the other end of the third link by a third connection shaft substantially parallel to the second connection shaft, and the first link is pivotally connected to the other end of the third link. A fourth link that is connected to one end of the second connecting shaft so as to be pivotable by a fourth connecting shaft that is substantially parallel to the third connecting shaft and coaxial with the pivot shaft;
An urging means for applying an urging force in a direction in which the second connecting shaft and the fourth connecting shaft are brought close to each other;
The pivot shaft is rotated and the wiper arm is disposed at a predetermined position slightly closer to the stop position than the reversal position. When the predetermined position is reached, the fourth link rotates about the pivot axis. A stopper to prevent,
In the state where the fourth link is prevented from rotating by the stopper, the moving mechanism is further driven against the urging force of the urging means by the pivot shaft being driven to rotate toward the stop position. The second connecting shaft and the fourth connecting shaft are separated from each other, and the second link moves substantially parallel to the fourth link, thereby moving the wiper arm substantially parallel. Item 6. The wiper device according to any one of Items 1 to 5.   The wiper device according to claim 6, wherein the biasing means is a tension spring that is locked in the vicinity of the second connecting shaft of the second link and in the vicinity of the fourth connecting shaft of the fourth link.   The urging means has a rotational torque applied around the pivot shaft when a wiping load in a wiping start direction assumed in advance is applied to the wiper blade, and is between the second connecting shaft and the fourth connecting shaft. 8. The wiper device according to claim 6, wherein the urging force is set so as to extend the distance.   The wiper device according to any one of claims 6 to 8, wherein the pivot shaft is an output shaft of a wiper motor that can rotate forward and backward. The moving mechanism is
A moving member fixed coaxially to the pivot shaft;
A ring member that is rotatably supported by a support shaft that is substantially parallel to the pivot shaft and has an inner peripheral surface that can be slidably contacted without rotating the moving member;
It is coaxially arranged with the ring member and is rotationally driven by a wiper motor with the support shaft as a rotation center, and the pivot member is rotatably supported on the inner peripheral surface of the ring member. A rotating member that is held so as to be abuttable;
A fixing member that connects the rotating member and the link member when the rotating member is in a predetermined rotation angle range;
When the rotating member rotates in a state where the rotating member and the ring member are not connected by the fixing member, the moving mechanism is arranged on the inner peripheral surface of the ring member without rotating the moving member. When the rotating member rotates integrally with the ring member while being held in sliding contact and the rotating member and the ring member are connected by the fixing member, the moving member is moved together with the ring member. The wiper device according to any one of claims 1 to 5, wherein the wiper device is rotated around the support shaft.

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