JP2011168165A - Wiper device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the overrun of a wiper blade at a wiper stop position and improve the appearance at the wipe stop position. <P>SOLUTION: A swivel 18 includes a connection arm portion 34 rotatably connected to distal ends of a main arm 12 and a sub-arm 14 via a first rotary shaft 40 and a second rotary shaft 42, an immediate arm portion 36 extending from the connection arm portion 34 toward a base end of a wiper blade 16, and a mounting arm portion 38 extending from a distal end portion of the immediate arm portion 36 toward a distal end of the wiper blade 16 in the longitudinal direction of the wiper blade 16. A distal end portion 38B of the mounting arm portion 38 is positioned to be closer to the base end of the wiper blade 16 than the first rotary shaft 40. With such a structure, the distance between a hook portion 44 and the first rotary shaft 40 can be shortened while ensuring the length of the mounting arm portion 38. Thus, the acceleration acting on the wiper blade 16 when the wiper blade 16 arrives at the wiper stop position can be reduced and the overrun of the wiper blade 16 can be suppressed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle wiper device.

  Patent Document 1 discloses a wiper device that includes a main arm, a sub arm, an arm piece that connects the leading end side of the main arm and the leading end side of the sub arm, and a wiper blade that is fixed to the arm piece. Yes.

JP 2007-196724 A JP 2009-166777 A JP 2007-62548 A JP 2005-1455 A

  However, in this type of vehicle wiper device, since the main arm and the sub arm constitute a pantograph type (link type) wiper arm, the overrun of the wiper blade at the wiper stop position may increase. Therefore, in order to suppress this, it is conceivable to set the wiper stop position above the lower edge of the window glass. However, in this case, the appearance of the vehicle wiper device at the wiper stop position deteriorates. .

  In particular, when an L-shaped arm piece is used as in the wiper device described in Patent Document 1, a rotation shaft that rotatably connects the main arm and the arm piece, and a hook formed on the arm piece The distance to the part becomes longer. Therefore, since the acceleration acting on the wiper blade when reaching the wiper stop position increases, the wiper blade overrun at the wiper stop position may increase.

  The present invention has been made in view of the above problems, and provides a vehicle wiper device that can suppress overrun of the wiper blade at the wiper stop position and can improve the appearance at the wiper stop position. The purpose is to do.

  In order to solve the above-mentioned problem, the vehicle wiper device according to claim 1 is characterized in that a base end side is fixed to a pivot shaft rotatably supported by a vehicle body and is reciprocally rotated integrally with the pivot shaft. A base end side is rotatably supported on the vehicle body by an arm and a driven shaft provided in parallel with the pivot shaft, and a sub arm provided in parallel with the main arm is formed in a longitudinal shape. The wiper blade having a mounting portion provided in the middle in the longitudinal direction thereof is connected to the front end side of the main arm and the front end side of the sub arm so as to be rotatable through a first rotation shaft and a second rotation shaft. A connecting arm portion, an intermediate arm portion extending from the connecting arm portion to one side in the longitudinal direction of the wiper blade, and a wiper blade extending from the distal end portion of the intermediate arm portion along the longitudinal direction of the wiper blade. The blade is extended to the other side in the longitudinal direction, and a mounted portion attached to the mounting portion is formed at the distal end portion thereof, and the base end portion of the wiper blade is longer than the first rotating shaft in the longitudinal direction. And a connecting member having a mounting arm portion positioned on the side.

  According to this vehicle wiper device, the intermediate arm portion extends from the connecting arm portion to one side in the longitudinal direction of the wiper blade, and the mounting arm portion extends from the distal end portion of the intermediate arm portion in the longitudinal direction of the wiper blade. Along the other side in the longitudinal direction of the wiper blade. And the base end part of the attachment arm part is located in the longitudinal direction one side of a wiper blade rather than the 1st rotation axis.

  Accordingly, it is possible to shorten the distance between the mounted portion and the first rotation shaft while securing the length of the mounting arm portion (the mounted portion can be positioned on one side in the longitudinal direction of the wiper blade). ). Thereby, since the acceleration which acts on the wiper blade when reaching the wiper stop position can be reduced, the overrun of the wiper blade at the wiper stop position can be suppressed.

  In addition, by suppressing the wiper blade overrun at the wiper stop position in this way, the wiper stop position can be set to a position closer to the lower edge of the window glass (lower position). The appearance at the position can also be improved.

  The vehicle wiper device according to claim 2 is the vehicle wiper device according to claim 1, wherein at least a part of the attached portion is overlapped in a longitudinal direction of the first rotation shaft and the wiper blade. It has been configured.

  According to this vehicle wiper device, at least a part of the mounted portion is overlapped in the longitudinal direction of the first rotating shaft and the wiper blade, so that the distance between the mounted portion and the first rotating shaft is further increased. It can be shortened (the attached portion can be positioned on one side in the longitudinal direction of the wiper blade).

  The vehicle wiper device according to claim 3 is the vehicle wiper device according to claim 1 or 2, wherein the intermediate arm portion extends to a proximal end side as one side in a longitudinal direction of the wiper blade. The mounting arm portion is configured to extend to the distal end side as the other side in the longitudinal direction of the wiper blade.

  According to this vehicle wiper device, since the intermediate arm portion extends from the connecting arm portion to the base end side of the wiper blade, the protrusion of the intermediate arm portion to the wiping area by the wiper blade can be suppressed. . Thereby, the visual field at the time of the action | operation of the wiper apparatus for vehicles can be ensured further.

  As described above in detail, according to the present invention, it is possible to suppress the overrun of the wiper blade at the wiper stop position and improve the appearance at the wiper stop position.

It is a principal part top view of the vehicle by which the wiper apparatus for vehicles which concerns on one Embodiment of this invention is mounted. It is a top view which shows the whole structure of the wiper apparatus for vehicles shown by FIG. FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 2. It is a principal part enlarged plan view of the vehicle wiper apparatus shown by FIG. It is a figure corresponding to FIG. 4 which shows the modification of the wiper apparatus for vehicles shown by FIG. It is a figure corresponding to FIG. 4 which shows the other modification of the wiper apparatus for vehicles shown by FIG. It is a figure which shows the result of the test done about the wiper apparatus for vehicles shown by FIG. It is a figure which shows the result of the test done about the wiper apparatus for vehicles shown by FIG. It is a principal part top view of the wiper device for vehicles concerning a comparative example.

  An embodiment of the present invention will be described below with reference to the drawings.

  In each figure, an arrow UP, an arrow FR, and an arrow OUT indicate the vehicle vertical direction upper side, the vehicle longitudinal direction front side, and the vehicle width direction outer side (right side).

  A vehicle 50 shown in FIG. 1 is a vehicle such as a passenger car, for example, and includes a windshield 52. The vehicle body of the vehicle 50 is provided with a pivot shaft 54 and a driven shaft 56 on the lower edge portion 52 </ b> A side of the windshield 52. The pivot shaft 54 and the driven shaft 56 are provided in parallel to each other, and are respectively supported rotatably on the vehicle body.

  A vehicle wiper device 10 according to an embodiment of the present invention is applied to a windshield 52 of the vehicle 50. As shown in FIGS. 1 and 2, a main arm 12, a sub arm 14, A wiper blade 16 and a swivel 18 as a connecting member are provided.

  The main arm 12 has a proximal end fixed to a pivot shaft 54, and is reciprocally rotated integrally with the pivot shaft 54. On the other hand, the sub arm 14 is fixed to the driven shaft 56 at the base end side and is provided in parallel with the main arm 12. As shown in FIG. 1, in the state where the vehicle wiper device 10 is attached to the vehicle 50, the main arm 12 is in an upper inverted position in the rotation direction of the vehicle wiper device 10 with respect to the sub arm 14. It is arranged on the P2 side.

  The wiper blade 16 is formed in a longitudinal shape, and is provided on the side opposite to the sub arm 14 with respect to the main arm 12. As shown in FIG. 3, the wiper blade 16 includes a blade rubber 20 for wiping the surface of the windshield 52, a plurality of support members 22 that support the blade rubber 20, and the plurality of support members 22. And a supporting member 24 for supporting the structure.

  The support member 24 is formed in a U-shaped cross section having a pair of side wall portions 24A and an upper wall portion 24B. An opening 24C that opens in the normal direction of the windshield 52 is formed at the center in the longitudinal direction of the upper wall portion 24B. A support pin 26 is provided between the opening 24C and the blade rubber 20. It has been.

  The support pin 26 extends in a direction opposite to the pair of side wall portions 24A, and both end portions in the extending direction are fixed to the pair of side wall portions 24A. A clip 28 as an attaching portion is rotatably supported on the support pin 26, and a lock portion 30 is provided on the distal end side (arrow B side) of the wiper blade 16. The lock portion 30 is rotatably supported by the pair of side wall portions 28 </ b> A of the clip 28 by a rotation shaft 32.

  As shown in FIG. 4, the swivel 18 includes a connecting arm portion 34, an intermediate arm portion 36, and a mounting arm portion 38, and is formed to be curved as a whole.

  That is, the connecting arm portion 34 is formed in a straight line extending in the parallel direction of the main arm 12 and the sub arm 14. The connecting arm portion 34 is rotatably connected to the distal end side of the main arm 12 and the distal end side of the sub arm 14 via a first rotating shaft 40 and a second rotating shaft 42.

  On the other hand, the intermediate arm portion 36 extends from the end portion on the main arm 12 side of the connecting arm portion 34 to the base end side (arrow A side) of the wiper blade 16, and the distal end portion thereof extends to the wiper blade 16 side. It is bent. Further, the attachment arm portion 38 extends linearly from the distal end portion of the intermediate arm portion 36 to the distal end side (arrow B side) of the wiper blade 16 along the longitudinal direction of the wiper blade 16. The intermediate arm portion 36 and the attachment arm portion 38 are formed in a U shape having a bottom portion on the proximal end side of the wiper blade 16.

  Further, as shown in FIG. 3, a hook portion 44 as a U-shaped attached portion engaged with the outer peripheral portion of the clip 28 is formed at the distal end portion 38 </ b> A of the attachment arm portion 38. As shown in FIG. 4, a part of the hook portion 44 overlaps the first rotating shaft 40 and the longitudinal direction of the wiper blade 16. That is, the overlap length is L. Further, the base end portion 38 </ b> B of the mounting arm portion 38 is located closer to the base end side (arrow A side) of the wiper blade 16 than the first rotation shaft 40.

  In the present embodiment, the base end side (the arrow A side and the pivot shaft 54 side in FIG. 2) of the wiper blade 16 corresponds to one side in the longitudinal direction of the wiper blade 16 in the present invention. The side (the side of the arrow B and opposite to the pivot shaft 54 in FIG. 2) corresponds to the other side in the longitudinal direction of the wiper blade 16 in the present invention.

  The vehicle wiper device 10 is configured to operate as follows. That is, when the pivot shaft 54 shown in FIG. 1 is reciprocally rotated by a wiper driving device (not shown), the main arm 12 is reciprocally rotated together with the pivot shaft 54 and connected to the main arm 12 via the swivel 18. The sub arm 14 is reciprocally rotated following the main arm 12.

  Further, when the sub arm 14 and the main arm 12 are reciprocally rotated, the relative positions of the distal end side of the sub arm 14 and the distal end side of the main arm 12 are changed, whereby the swivel 18 and the wiper blade 16 fixed to the swivel 18 are fixed. The posture with respect to the main arm 12 is changed.

  The wiper blade 16 changes the position with respect to the main arm 12 in this way, while the wiper stop position (lower inversion position P1) on the lower edge 52A side of the windshield 52 and the vertical edge 52B side of the windshield 52 Is reciprocatingly rotated between the upper reversing position P2 and the surface of the windshield 52 is wiped off.

  Next, the operation and effect of one embodiment of the present invention will be described.

  First, a comparative example will be described in order to clarify the operation and effect of one embodiment of the present invention.

  In the vehicle wiper device 60 according to the comparative example shown in FIG. 9, an L-shaped swivel 68 is used instead of the swivel 18 (see FIG. 4) in the present embodiment. The swivel 68 includes a connecting arm portion 74 formed in a straight line extending in the parallel direction of the main arm 12 and the sub arm 14, and the end of the connecting arm portion 74 on the main arm 12 side to the tip side of the wiper blade 16. And an attachment arm 78 extending linearly to the arrow B side. Further, the base end portion 78 </ b> B of the mounting arm portion 78 is positioned on the distal end side (arrow B side) of the wiper blade 16 with respect to the first rotation shaft 40.

  However, in the vehicle wiper device 60 according to this comparative example, the distance between the center 84A of the bent portion of the hook portion 84 formed at the tip end portion 78A of the mounting arm portion 78 and the center 40A of the first rotation shaft 40 is set. become longer.

  That is, the distance between the center 84A of the curved portion of the hook portion 84 and the center 40A of the first rotation shaft 40 is R1, and the distance between the center 40A of the first rotation shaft 40 and the center 42A of the second rotation shaft 42 is. Assuming R2, R1 / R2> 1.

  Therefore, in the comparative example shown in FIG. 9, when the wiper blade 16 reaches the wiper stop position (lower inversion position) during the operation of the vehicle wiper device 60, the wiper stop positions of the main arm 12 and the sub arm 14. In addition to the movement of the wiper blade 16 by the rotation in the direction, the wiper blade 16 rotates around the center 40A of the first rotation shaft 40 so that the tip end side thereof moves toward the wiper stop position (clockwise in FIG. 1). Direction). Therefore, when the distance between the center 84A of the hook portion 84 and the center 40A of the first rotation shaft 40 is long, the acceleration acting on the wiper blade 16, particularly the tip portion, is remarkably increased, and the wiper is stopped at the wiper stop position. There is a possibility that the overrun of the wiper blade 16 becomes large.

  On the other hand, according to the vehicle wiper device 10 according to the embodiment of the present invention shown in FIG. 4, the intermediate arm portion 36 extends from the connecting arm portion 34 to the base end side (arrow A side) of the wiper blade 16. The mounting arm portion 38 extends from the distal end portion of the intermediate arm portion 36 to the distal end side (arrow B side) of the wiper blade 16 along the longitudinal direction of the wiper blade 16. The proximal end portion 38 </ b> B of the mounting arm portion 38 is located closer to the proximal end side of the wiper blade 16 than the first rotation shaft 40.

  Accordingly, the distance between the center 44A of the bent portion of the hook portion 44 and the center 40A of the first rotation shaft 40 can be shortened while securing the length of the mounting arm portion 38 (the hook portion 44 is further wiped). Can be located on the proximal side of the blade 16). As a result, the acceleration acting on the wiper blade 16 when reaching the wiper stop position (lower inversion position P1) shown in FIG. 1 can be reduced, so that overrun of the wiper blade 16 at the wiper stop position can be suppressed. it can.

  Further, by suppressing the overrun of the wiper blade 16 at the wiper stop position in this way, the wiper stop position can be set to a position (lower position) close to the lower edge portion 52A of the windshield 52. Also, the appearance at the wiper stop position can be improved.

  In particular, as shown in FIG. 4, a part of the hook portion 44 is overlapped in the longitudinal direction of the first rotating shaft 40 and the wiper blade 16, so The distance from the center 40A of the rotating shaft 40 can be further shortened (the hook portion 44 can be positioned closer to the proximal end side of the wiper blade 16).

  Further, since the intermediate arm portion 36 extends from the connecting arm portion 34 to the base end side (arrow A side) of the wiper blade 16, the protrusion of the intermediate arm portion 36 to the wiping area by the wiper blade 16 is suppressed. be able to. Thereby, the visual field at the time of the action | operation of the wiper apparatus 10 for vehicles can be ensured further.

  Next, the results of tests performed on the above-described vehicle wiper device 10 will be described.

  Here, regarding the vehicle wiper device 10 according to the embodiment of the present invention described above and the vehicle wiper device 60 (two types) according to the comparative example described above, the acceleration at the lower reversal position and the upper reversal position of the wiper blade are described. The acceleration at was measured. FIG. 7 shows the measurement results.

  In the vehicle wiper device 10 according to the embodiment of the present invention, R1 / R2 = 0.68 (R1 = 25 mm). In the vehicle wiper device 60 (two types) according to the comparative example, R1 / R2 = 1.08 (R1 = 40 mm) and R1 / R2 = 1.47 (R1 = 54.4 mm). Note that R2 is a value common to the wiper devices for vehicles.

  In FIG. 7, the first vertical axis and the second vertical axis indicate the acceleration at the lower inversion position and the acceleration at the upper inversion position, respectively, and the horizontal axis indicates the relationship between the hook portion and the first rotation axis. The distance R1 is shown. The graph G1 shows the relationship between the acceleration at the lower inversion position and the distance R1, and the graph G2 shows the relationship between the acceleration at the upper inversion position and the distance R1.

  As shown in the graph G1, when R1 / R2 = 1.08 (R1 = 40 mm) and R1 / R2 = 1.47 (R1 = 54.4 mm), the acceleration at the lower inversion position increases. On the other hand, in the case of R1 / R2 = 0.68 (R1 = 25 mm), the acceleration at the lower inversion position is kept low.

  As shown in the graph G2, when R1 / R2 = 0.68 (R1 = 25 mm), the acceleration at the upper inversion position is higher, but the value itself is higher than the acceleration at the lower inversion position. Is extremely small and within acceptable limits.

  In addition, here, regarding the vehicle wiper device 10 according to the embodiment of the present invention described above and the vehicle wiper device 60 (two types) according to the comparative example described above, the wiping rate, the lower depression angle, and the wiper stop position are The overrun amount of the wiper blade was measured. FIG. 8 shows the measurement results.

  In FIG. 8, the first vertical axis represents the wiping rate, the second vertical axis represents the downward depression angle, and the horizontal axis represents the overrun amount of the wiper blade at the wiper stop position. Graph G3 shows the wiping rate of each vehicle wiper device, and graph G4 shows the relationship between the downward depression angle and the amount of overrun of the wiper blade at the wiper stop position.

  As shown by the graph G3, a constant wiping rate can be ensured regardless of which value R1 / R2 is set. On the other hand, as shown in the graph G4, when R1 / R2 = 0.68 (R1 = 25 mm), the overrun amount of the wiper blade at the wiper stop position is suppressed while ensuring the downward depression angle. Can do.

  From the above, it is preferable that R1 / R2 ≦ 0.68.

  Next, a modification of one embodiment of the present invention will be described.

  In the above embodiment, the vehicle wiper device 10 is applied to the windshield 52, but may also be applied to, for example, a rear glass.

  In addition, the intermediate arm portion 36 and the attachment arm portion 38 are formed in a U shape, but may be formed in a V shape, for example, as shown in FIG.

  The intermediate arm portion 36 extends to the base end side (arrow A side) of the wiper blade 16, and the mounting arm portion 38 extends to the tip end side (arrow B side) of the wiper blade 16. As shown in FIG. 6, the intermediate arm portion 36 may be extended to the distal end side of the wiper blade 16, and the attachment arm portion 38 may be extended to the proximal end side of the wiper blade 16. Even if comprised in this way, there can exist an effect similar to the above.

  In this case, the base end side (the arrow A side and the pivot shaft 54 side in FIG. 2) of the wiper blade 16 corresponds to the other side in the longitudinal direction of the wiper blade 16 in the present invention. The side (on the side of arrow B and opposite to the pivot shaft 54 in FIG. 2) corresponds to one side in the longitudinal direction of the wiper blade 16 in the present invention.

  Further, as shown in FIG. 4, a part of the hook portion 44 is overlapped in the longitudinal direction of the first rotation shaft 40 and the wiper blade 16, but all of the hook portion 44 is connected to the first rotation shaft 40. The wiper blade 16 may be overlapped in the longitudinal direction.

  In the above embodiment, the driven shaft 56 is rotatably supported by the vehicle body, and the base end side of the sub arm 14 is fixed to the driven shaft 56. However, the driven shaft 56 is fixed to the vehicle body, and the base of the sub arm 14 is fixed. The end side may be rotatably supported by the driven shaft 56.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and other various modifications can be made without departing from the spirit of the present invention. It is.

DESCRIPTION OF SYMBOLS 10 Vehicle wiper apparatus 12 Main arm 14 Sub arm 16 Wiper blade 18 Swivel (connection member)
28 clips (mounting part)
34 connecting arm portion 36 intermediate arm portion 38 mounting arm portion 40 first rotating shaft 42 second rotating shaft 44 hook portion (attached portion)
54 Pivot shaft 56 Driven shaft

Claims (3)

A main arm whose base end side is fixed to a pivot shaft rotatably supported by the vehicle body and reciprocally rotated integrally with the pivot shaft;
The base end side is rotatably supported by the vehicle body by a driven shaft provided in parallel with the pivot shaft, and a sub arm provided in parallel with the main arm;
A wiper blade formed in a longitudinal shape and provided with a mounting portion in the middle in the longitudinal direction;
A connecting arm portion rotatably connected to a leading end side of the main arm and a leading end side of the sub arm via a first rotating shaft and a second rotating shaft; and a longitudinal direction of the wiper blade from the connecting arm portion An intermediate arm extending to one side, and extending from the distal end of the intermediate arm to the other longitudinal direction of the wiper blade along the longitudinal direction of the wiper blade; A connecting member having an attachment arm portion attached to the attachment arm portion, the base end portion of which is located on one side in the longitudinal direction of the wiper blade with respect to the first rotation shaft,
Wiper apparatus for vehicles provided with. At least a part of the attached portion is overlapped in the longitudinal direction of the first rotating shaft and the wiper blade,
The vehicle wiper device according to claim 1. The intermediate arm portion extends to the base end side as one side in the longitudinal direction of the wiper blade,
The mounting arm portion extends to the tip side as the other side in the longitudinal direction of the wiper blade.
The vehicle wiper device according to claim 1 or 2.