wiper unit

Abstract

A windshield wiper device is provided that enables high-precision installation of retaining members in a short time. The wiper device includes: a first pivot and a second pivot connected to a wiper arm; a drive unit for rotating the first pivot; a connecting unit connected to the second pivot and the drive unit for synchronously rotating the two pivots; and a first retaining member and a second retaining member for securing each of the pivots to the vehicle body. The second retaining member includes: a body portion for rotatably supporting the second pivot; and three support portions protruding from the body portion. The first and third support portions include: a fixed portion secured by bolts; and a locking pin disposed on the fixed portion for engaging with the vehicle body.

Description

Technical Field

[0001] This invention relates to a windshield wiper device. Background Technology

[0002] Windshield wiper systems used in vehicles typically include: a wiper motor; a link mechanism that transmits the rotational force of the wiper motor; a pivot that connects to the link mechanism at one end and fixes the wiper arm at the other end; and a retaining member for securing the pivot to the vehicle body. In most cases, there are two wiper arms, one on the driver's side and one on the passenger side. Correspondingly, a pivot, link mechanism, and retaining member are also located on both the driver's and passenger's sides.

[0003] The two linkages are connected by a rod. Thus, the rotational force of the wiper motor is transmitted to the two pivots via the rod and the two linkages. Furthermore, the wiper arm on the driver's side and the wiper arm on the passenger side are driven synchronously.

[0004] Here, sometimes a pipe, different from the rod, is used to connect the two pivots, thus making them firmly integrated. On the other hand, sometimes the pipe is omitted, and only the rod is used to connect the two pivots. In this case, the number of parts in the wiper unit can be reduced, and weight reduction can be achieved.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2010-179762 Summary of the Invention

[0008] The problem that the invention aims to solve

[0009] However, if the tube connecting the two pivots is omitted as in the prior art, each retaining member will rotate relative to the rod when the retaining member is installed on the vehicle body. Therefore, during the installation of one of the two retaining members, the position of the other retaining member may shift significantly. Consequently, it may be difficult to install the retaining members with high precision in a short time.

[0010] In particular, when the vehicle body is tilted, the other retaining member may move due to its own weight while one of the two retaining members is fixed to the vehicle body. Therefore, it may be more difficult to install the retaining member to the vehicle body.

[0011] Therefore, the present invention provides a wiper device that can install and retain the component with high precision in a short time.

[0012] Technical means to solve the problem

[0013] To solve the aforementioned problem, the wiper device of the present invention is characterized by comprising: two pivots respectively connected to wiper arms; a drive unit for rotating and driving a first pivot of the two pivots; a connecting unit for connecting a second pivot of the two pivots and the drive unit, thereby driving the two pivots to rotate and drive synchronously; and a retaining member for fixing each of the pivots to the vehicle body, wherein at least one of the two retaining members comprises: a body portion for rotatably supporting the pivot; and a plurality of support portions protruding from the body portion, wherein at least two of the plurality of support portions comprise: a fixed portion fixed to the vehicle body via a fixing member; and an engaging claw disposed on the fixed portion for engaging with the vehicle body.

[0014] The wiper device of the present invention is characterized by comprising: two pivots respectively connected to wiper arms; a drive unit for rotating the first pivot of the two pivots; a connecting unit connected to the second pivot of the two pivots and the drive unit, for synchronously rotating the two pivots; and two retaining members for fixing each of the pivots to the vehicle body, at least one of the two retaining members comprising: a body portion for rotatably supporting the pivot; and a plurality of support portions protruding from the body portion, at least two of the plurality of support portions having a fixed portion protruding from the body portion in a direction intersecting the axial direction of the pivot, and fixed to the vehicle body via a member, wherein each fixed portion has an insertion hole for inserting the fixing member, and the size of each insertion hole is different.

[0015] The effects of the invention

[0016] According to the present invention, the retaining member can be temporarily fixed to the vehicle body before being fixed to the vehicle body by the fixing member. Therefore, it is possible to prevent the position of the other retaining member from shifting while one of the two retaining members is being installed on the vehicle body. This allows for high-precision installation of the retaining member on the wiper assembly in a short time. Attached Figure Description

[0017] Figure 1 This is a front view of the vehicle in an embodiment of the present invention.

[0018] Figure 2 This is a perspective view showing a windshield wiper device according to an embodiment of the present invention.

[0019] Figure 3 This is a perspective view showing the second retaining member in an embodiment of the present invention.

[0020] Figure 4This is a plan view of the second retaining member in an embodiment of the present invention, taken from above along the axial direction.

[0021] Figure 5 This is an exploded perspective view showing a portion of the second retaining member, the second pivot, and the connecting portion in an embodiment of the present invention.

[0022] Figure 6 This is an enlarged perspective view of the vicinity of the fixed cylinder in an embodiment of the present invention.

[0023] Figure 7 This is a plan view taken from below of the second pivot cover in an embodiment of the present invention.

[0024] Figure 8 This is a perspective view showing the second retaining member in a first variation of the present invention.

[0025] Figure 9 This is a perspective view showing the second retaining member in a second variation of the present invention.

[0026] Explanation of symbols

[0027] 1: Wiper assembly

[0028] 2a: First pivot

[0029] 2b: Second Pivot

[0030] 2c, 2d: Front-end

[0031] 2e: Base end

[0032] 2f: Flange portion

[0033] 3: Drive unit

[0034] 4: Connecting parts

[0035] 5: Motor with a speed reducer

[0036] 5a: Output shaft

[0037] 6: First connecting rod component

[0038] 7: Motor section (motor)

[0039] 8: Deceleration section

[0040] 9: First link arm

[0041] 9a: One end

[0042] 9b: Bend

[0043] 9c: The other end

[0044] 10: Second Linkage Arm

[0045] 10a: One end

[0046] 10b: The other end

[0047] 11: Third Linkage Arm

[0048] 11a: One end

[0049] 11b: The other end

[0050] 12a: First retaining member

[0051] 12b: Second retaining member

[0052] 13: Base

[0053] 14a: First support section

[0054] 14b: Second support section

[0055] 14c: Third support section

[0056] 15: Bolt insertion hole

[0057] 16: Rubber mounting components

[0058] 17: First Pivot Cover

[0059] 17a: Cover body

[0060] 17b: Wall

[0061] 17c: Insertion section

[0062] 20: Ontology part

[0063] 21: First Support Section

[0064] 22: Second Support Section

[0065] 23: Third Support Section

[0066] 24: Inner cylindrical section

[0067] 24a: outer peripheral surface

[0068] 25: Outer cylindrical section

[0069] 25a: Inner circumferential surface

[0070] 25b: outer peripheral surface

[0071] 26: Ribs

[0072] 27: middle plate

[0073] 28: Drain hole

[0074] 29: Fitting convex part

[0075] 30: Fixed part

[0076] 30a: Base

[0077] 30b: Fixed cylinder

[0078] 30c: Insertion hole

[0079] 30d: Upper surface

[0080] 30e: Protrusion

[0081] 30f: Lower surface

[0082] 30g: outer circumference

[0083] 30h: Arc section

[0084] 30i: Inner circumferential surface

[0085] 31: Collar

[0086] 32: Flat washer

[0087] 33: Ribs (side view)

[0088] 34: convex part

[0089] 35: Press into the ribs

[0090] 36: Body latching part

[0091] 37: Feet

[0092] 37a: Front end (outer end)

[0093] 38: Card-connecting pin (card-connecting claw, pin part)

[0094] 39a: First engagement hole (hole)

[0095] 39b: Second engagement hole (hole)

[0096] 40: Second pivot cover

[0097] 40a: Cover body

[0098] 40b: Discharge plate

[0099] 40c: Insertion part

[0100] 40d: Wall

[0101] 40e: Opening

[0102] 41: First cylindrical section

[0103] 41a: Step difference part

[0104] 42: Second cylindrical section

[0105] 43: Chimeric part

[0106] 43a, 43b: Sidewalls

[0107] 44: Press into the ribs

[0108] 45: Toothed washer

[0109] 51: Rod

[0110] 51a: One end

[0111] 51b: The other end

[0112] 52: Second Linkage Member

[0113] 52a: One end

[0114] 52b: The other end

[0115] 100: Vehicles

[0116] 101: Body

[0117] 102: Front window glass

[0118] 103a: First wiper blade

[0119] 103b: Second wiper blade

[0120] 104a: First wiper arm

[0121] 104b: Second wiper arm

[0122] 105: Bolt (for fixing components)

[0123] 105a: Head

[0124] 106, 107, 108, 109: Support pins

[0125] 231a: First fixed cylinder

[0126] 231b: Second fixed cylinder

[0127] 231c: Third fixed cylinder

[0128] 232a: First insertion hole

[0129] 232b: Second insertion hole

[0130] 232c: Third insertion hole

[0131] 233a, 233b, 233c: Collars Detailed Implementation

[0132] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0133] <Vehicles>

[0134] Figure 1 This is a front view of a vehicle 100 including the windshield wiper unit 1. In the following description, the direction of gravity up and down will sometimes be referred to simply as the up direction and the down direction. Furthermore, the driver's seat of the vehicle 100 is located on the right side.

[0135] like Figure 1 As shown, the vehicle 100 is equipped with a first wiper blade 103a and a second wiper blade 103b to wipe the front glass 102.

[0136] The first wiper blade 103a is mounted on the front end of the first wiper arm 104a. The first wiper blade 103a is forced towards the windshield 102 by a spring (not shown) installed in the first wiper arm 104a.

[0137] The second wiper blade 103b is mounted on the front end of the second wiper arm 104b. The second wiper blade 103b is forced towards the front window glass 102 by a spring (not shown) installed in the second wiper arm 104b.

[0138] The base ends of each wiper arm 104a and 104b are mounted to the wiper device 1 fixed to the body 101 of the vehicle 100. The wiper device 1 drives each wiper arm 104a and 104b to perform wiping action.

[0139] The wiping pattern of the wiper unit 1 is a so-called tandem arrangement, in which the following pivots 2a and 2b supporting each wiper arm 104a and 104b are arranged on the outer side of the windshield 102 in the vehicle width direction on the driver's side and in the center of the vehicle width direction (passenger side). Each wiper arm 104a and 104b is driven by the wiper unit 1 to swing in the same direction between an up-reverse position and a down-reverse position to wipe the windshield 102.

[0140] <Windshield wiper system>

[0141] Figure 2 This is a perspective view showing the wiper device 1. In the following description of the wiper device 1, the terms "above" or "below" refer to the direction in which the wiper device 1 is mounted on the vehicle body 101.

[0142] like Figure 2As shown, the wiper device 1 includes: a first pivot 2a and a second pivot 2b, connecting the base ends of each wiper arm 104a, 104b; a drive unit 3, which drives the first pivot 2a to rotate; a connecting unit 4, which connects the drive unit 3 to the second pivot 2b; and a first retaining member 12a and a second retaining member 12b, for fixing each pivot 2a, 2b to the vehicle body 101.

[0143] The first pivot 2a is positioned below the windshield 102 and on the outer side of the vehicle width direction on the driver's seat side. The axial direction of the first pivot 2a is along the normal direction of the windshield 102. On the outer side of the vehicle width, i.e., the upper side, the axial direction of the first pivot 2a is... Figure 2 The front end 2c of the paper (near the front side) is connected to the base end of the first wiper arm 104a.

[0144] The second pivot 2b is positioned below the windshield 102 and at the center in the vehicle width direction (passenger side). The axis of the second pivot 2b is along the normal direction of the windshield 102, that is, parallel to the first pivot 2a. The axis of the second pivot 2b is located on the outer side of the vehicle, i.e., on the upper side. Figure 2 The front end 2d of the paper (near the front side) is connected to the base end of the second wiper arm 104b.

[0145] <Drive Department>

[0146] The drive unit 3 includes: a motor 5 with a speed reducer and an output shaft 5a; and a first link member 6 that connects the output shaft 5a to a first pivot 2a.

[0147] The motor 5 with a speed reducer includes: a motor section 7; and a speed reduction section 8, which reduces the rotation of the motor section 7 to output a speed reduction. The motor section 7 may be, for example, a servo motor.

[0148] The reduction unit 8, for example, has a worm gear reduction mechanism. A worm shaft (not shown) of the reduction unit 8 is connected to a motor shaft (not shown) of the motor unit 7. A worm wheel (not shown) is provided in engagement with the worm shaft. An output shaft 5a is provided on the same shaft as the worm wheel, and the output shaft 5a rotates integrally with the worm wheel. The axial direction of the output shaft 5a is parallel to the axial direction of the first pivot 2a. Hereinafter, the axial directions of these output shafts 5a, the first pivot 2a, and the second pivot 2b will be simply referred to as axial directions.

[0149] The first linkage component 6 includes: a first linkage arm 9, one end 9a of which is non-rotatably connected to a first pivot 2a; a second linkage arm 10, one end 10a of which is non-rotatably connected to the output shaft 5a of a motor 5 with a speed reducer; and a third linkage arm 11 that connects the first linkage arm 9 and the second linkage arm 10.

[0150] The first link arm 9 is a V-shaped plate member when viewed axially. The second link arm 10 and the third link arm 11 are rectangular plate members that are longer in one direction when viewed axially. Based on this structure, one end 11a of the third link arm 11 is rotatably connected to the bend 9b of the first link arm 9 via a support pin 106. The other end 11b of the third link arm 11 is rotatably connected to the other end 10b of the second link arm 10 via a support pin 107. Thus, the rotation of the output shaft 5a is transmitted to the first pivot 2a via the first link member 6.

[0151] <First retaining member>

[0152] The first retaining member 12a supports the first pivot 2a. Furthermore, the first retaining member 12a has a base 13 supporting the motor 5 with a speed reducer. The base 13 is a plate member extending elongated in the vehicle width direction parallel to the vehicle body 101. The motor 5 with a speed reducer is supported on the first pivot 2b side (the center side in the vehicle width direction) of the base 13. The motor 5 with a speed reducer is positioned on the vehicle body 101 side of the base 13. The output shaft 5a of the motor 5 with a speed reducer protrudes via the base 13 to the side opposite to the vehicle body 101.

[0153] A cylindrical first body portion (not shown) is provided axially on the side opposite to the first pivot 2b in the base 13. The first pivot 2b is rotatably supported in the body portion. One end of the first linkage arm 9 is non-rotatably connected to a portion protruding from the first body portion toward the side opposite to the vehicle body 101.

[0154] Furthermore, three support portions 14a, 14b, and 14c (first support portion 14a, second support portion 14b, and third support portion 14c) are integrally formed on the outer circumference of the base 13. The first support portion 14a of the three support portions 14a, 14b, and 14c is located on the side of the first pivot 2b in the base 13 (the center side in the vehicle width direction).

[0155] The second support portion 14b and the third support portion 14c of the three support portions 14a, 14b, and 14c are disposed on the outer peripheral surface of the first body portion (not shown). Each support portion 14a, 14b, and 14c protrudes outward from the outer periphery of the base base 13 or the outer peripheral surface of the first body portion, generally along the surface direction of the base base 13.

[0156] Bolt insertion holes 15 (not shown) are formed at the front ends of each support portion 14a, 14b, and 14c. A rubber mount 16 is installed in each bolt insertion hole 15.

[0157] In the vehicle body 101, female thread portions (not shown) are formed at the locations of the support portions 14a, 14b, and 14c corresponding to the bolt insertion holes 15. Bolts inserted from the support portions 14a, 14b, and 14c into the bolt insertion holes 15 are screwed into these female thread portions. This secures the first retaining member 12a to the vehicle body 101.

[0158] A first pivot cover 17 is mounted at a forward end 2c of a first pivot 2a that is rotatably supported by a first retaining member 12a. The first pivot cover 17 is integrally formed by a circular cover body 17a and a wall portion 17b that rises from the outer periphery of the cover body 17a on the opposite side to the vehicle body 101. A cylindrical insertion portion 17c for inserting the first pivot 2a is integrally formed at the radial center of the cover body 17a.

[0159] Based on this structure, the first pivot cover 17 prevents rainwater and other substances from entering the wiper unit 1 through the first pivot 2a.

[0160] <Second retaining member>

[0161] Figure 3 This is a perspective view showing the second retaining member 12b. Figure 4 This is a plan view of the second retaining member 12b, taken from above along the axial direction. Figure 5 This is an exploded perspective view showing a portion of the second retaining member 12b, the second pivot 2b, and the connecting portion 4. In the following description of the second retaining member 12b, the terms radial and circumferential refer to the radial and circumferential directions of the second pivot 2b, respectively.

[0162] like Figures 3 to 5 As shown, the second retaining member 12b is integrally formed with the body portion 20, which rotatably supports the second pivot 2b, and three support portions 21, 22, and 23 (first support portion 21, second support portion 22, and third support portion 23) protruding radially outward from the body portion 20. The second retaining member 12b is made of resin and is formed, for example, by injection molding.

[0163] The body portion 20 includes: an inner cylindrical portion 24 that rotatably supports a second pivot 2b; and an outer cylindrical portion 25 formed to surround the inner cylindrical portion 24. The outer cylindrical portion 25 is disposed on a concentric circle of the inner cylindrical portion 24. The axial length of the outer cylindrical portion 25 is shorter than the axial length of the inner cylindrical portion 24. A plurality of ribs 26 (e.g., nine in this embodiment) are integrally formed on the inner circumferential surface 25a of the outer cylindrical portion 25, connecting the inner circumferential surface 25a and the outer circumferential surface 24a of the inner cylindrical portion 24.

[0164] Rib 26 is formed across the entire axial direction of the inner circumferential surface 25a of the outer cylindrical portion 25. Rib 26 is a plate member that is radially oriented when viewed from the axial direction. Multiple ribs 26 are arranged at equal intervals along the circumferential direction. Furthermore, on the inner circumferential surface 25a of the outer cylindrical portion 25, a middle plate 27 is integrally formed at the axial center, connecting the inner circumferential surface 25a and the outer circumferential surface 24a of the inner cylindrical portion 24.

[0165] The middle plate 27 is formed across the entire circumference. The middle plate 27 separates the space between the inner cylindrical portion 24 and the outer cylindrical portion 25. In the middle plate 27, a drainage hole 28 is formed at the center between adjacent circumferential ribs 26, extending axially. The drainage hole 28 discharges rainwater and other water that has seeped into the space between the inner cylindrical portion 24 and the outer cylindrical portion 25 downwards.

[0166] Furthermore, an engaging protrusion 29 is formed on the outer peripheral surface 25b of the outer cylindrical portion 25 in the upper axial direction. The engaging protrusion 29 is formed in the shape of a cuboid that is longer in the axial direction. The engaging protrusion 29 engages with the second pivot cover 40 described below. The engaging protrusion 29 positions the second pivot cover 40 for the second retaining member 12b.

[0167] Three support portions 21, 22, and 23 protrude radially outward from the outer peripheral surface 25b of the outer cylindrical portion 25. The three support portions 21, 22, and 23 are arranged in the circumferential direction in the order described above, with the first support portion 21, the second support portion 22, and the third support portion 23, avoiding the fitting protrusion 29. In the following description of the three support portions 21, 22, and 23, for ease of understanding, the same shapes are labeled with the same symbols.

[0168] The three support portions 21, 22, and 23 each have a fixed portion 30 that protrudes radially from the outer peripheral surface 25b of the outer cylindrical portion 25. The fixed portion 30 has a plate-shaped base 30a whose thickness direction is aligned with the axial direction. The base 30a is formed to be radially elongated and tapers slightly towards the radially outer end from the outer peripheral surface 25b of the outer cylindrical portion 25.

[0169] Of the three support portions 21, 22, and 23, the fixed portion 30 of the first support portion 21 and the fixed portion 30 of the third support portion 23 are arranged facing each other with their bases 30a separated by the body portion 20. The fixed portions 30 of the first support portion 21 and the fixed portions 30 of the third support portion 23 are arranged in a straight line along their length.

[0170] Of the three support portions 21, 22, and 23, the fixed portion 30 of the second support portion 22 is arranged facing the fitting protrusion 29 of the outer cylindrical portion 25 across the body portion 20. The circumferential distance between the first support portion 21 and the second support portion 22 is the same as the circumferential distance between the second support portion 22 and the third support portion 23.

[0171] On the outer cylindrical portion 25 side end of the base 30a, an injection gate mark G is formed in the center of the circumference. The injection gate mark G is the resin injection mark formed during the injection molding of the second retaining member 12b.

[0172] A cylindrical fixing cylinder 30b protrudes downward from the radial side end of the base 30a. The axial direction of the fixing cylinder 30b is aligned with the axial direction of the second pivot 2b (body part 20).

[0173] The radially outer end of the base 30a has an arcuate portion 30h, which is formed in an arcuate shape when viewed axially, corresponding to the shape of the fixing cylinder 30b. An insertion hole 30c communicating with the fixing cylinder 30b is formed in the base 30a. On the upper surface 30d of the base 30a (the surface opposite to the fixing cylinder 30b), three protrusions 30e are formed around the insertion hole 30c. The three protrusions 30e are arranged at equal intervals circumferentially. These protrusions 30e serve to prevent shaking when the second retaining member 12b is fixed to the vehicle body 101 (details will be explained below).

[0174] Three ribs 33 are formed protruding downward from the lower surface 30f of the base 30a. The three ribs 33 span the outer peripheral surface 25b of the fixed cylinder 30b and the outer cylindrical portion 25. Two of the three ribs 33 are located on the circumferential side edges of the base 30a. The remaining rib 33 is located in the center between these two ribs 33.

[0175] The lower end of each rib 33 is formed in an arc shape, tapering towards the fixed cylinder 30b when viewed circumferentially. The lower end of the end of each rib 33 on the fixed cylinder 30b side is positioned at the same position as the lower end of the fixed cylinder 30b.

[0176] On the outer peripheral surface 30g of the fixed cylinder 30b, a protrusion 34 is formed at a location corresponding to the circumferential center of the arcuate portion 30h formed in the base 30a (the radially outermost end of each support portion 21, 22, 23). The protrusion 34 and the injection gate mark G are disposed at opposite ends of the radial direction of the base 30a, facing each other in the radial direction. The protrusion 34 is formed across the entire axial direction of the fixed cylinder 30b. The protrusion 34 protrudes to the opposite side of the outer cylindrical portion 25. The protrusion 34 has the function of suppressing the formation of a weld seam when the second retaining member 12b is injection molded (details will be explained below).

[0177] Figure 6 This is an enlarged perspective view of the vicinity of the fixed cylinder 30b in the first support part 21.

[0178] like Figures 3 to 6 As shown, in each fixed portion 30, three press-in ribs 35 are formed on the inner circumferential surface 30i of the fixing cylinder 30b. The press-in ribs 35 are formed across the entire axial direction of the fixing cylinder 30b. The press-in ribs 35 are arranged at equal intervals along the circumference, corresponding to the protrusions 30e formed on the base 30a. The press-in ribs 35 hold the collar 31 in the fixing cylinder 30b.

[0179] A collar 31 is pressed into the inner circumferential surface 30i of the fixed cylinder 30b. The collar 31 protrudes slightly from the upper surface 30d of the base 30a. The protrusion height is approximately the same as the protrusion height of the protrusion 30e formed in the base 30a.

[0180] A bolt (an example of a fixing member) 105 is inserted into the collar 31. The bolt 105 secures the second retaining member 12b to the vehicle body 101. A flat washer 32 is placed between the head 105a and the base 30a of the bolt 105.

[0181] Of the three support portions 21, 22, and 23, a body engaging portion 36 is integrally formed in the fixed portion 30 of the first support portion 21 and the fixed portion 30 of the third support portion 23. The body engaging portion 36 is disposed in the fixed portion 30 of the first support portion 21 in the rib 33 (an example of the side of the second support portion) located closest to the second support portion 22. The body engaging portion 36 is disposed near the fixing cylinder 30b of the rib 33.

[0182] Furthermore, the body engaging portion 36 is disposed in the fixed portion 30 of the third support portion 23 at the rib 33 closest to the second support portion 22 (an example of the side of the second support portion). The body engaging portion 36 is disposed near the fixing cylinder 30b of the rib 33. These body engaging portions 36 temporarily fix the second retaining member 12b to the body 101.

[0183] The body engaging portion 36 has: a foot portion 37 integrally formed with a fixing cylinder 30b close to the rib portion 33; and an engaging pin (an example of an engaging claw or pin portion) 38 integrally formed with the foot portion 37.

[0184] The feet 37 protrude from the upper part of the ribs 33 toward the side of the second support 22. The locking pin 38 is integrally formed at the protruding end of the foot 37, i.e., the front end (an example of the outer end) 37a.

[0185] The foot 37 is formed in a cuboid shape. The direction in which the foot 37 protrudes from the rib 33 is perpendicular to the axis along the normal direction of the rib 33. The locking pin 38 is formed in a cylindrical shape and protrudes further downward than the foot 37. Moreover, the locking pin 38 protrudes further downward than the fixing cylinder 30b of the first support 21 and the third support 23.

[0186] Thus, the second retaining member 12b is formed in a line symmetric manner with respect to the straight line L that connects the radial center of the body portion 20 (the axis of the second pivot 2b) to the circumferential center of the fitting protrusion 29 (the second support portion 22).

[0187] In the vehicle body 101, female thread portions (not shown) are formed at the locations of the support portions 21, 22, and 23 corresponding to the fixing cylinder 30b. Bolts 105, which are inserted from the support portions 21, 22, and 23 into the fixing cylinder 30b and the insertion hole 30c, are screwed into the female thread portions. This secures the second retaining member 12b to the vehicle body 101.

[0188] In the vehicle body 101, a first engaging hole (an example of a hole) 39a and a second engaging hole (an example of a hole) 39b are formed at positions corresponding to each vehicle body engaging part 36. Engaging pins 38 of each vehicle body engaging part 36 are inserted into each engaging hole 39a and 39b.

[0189] The first engaging hole 39a is circular when viewed axially. The inner diameter of the first engaging hole 39a is slightly larger than the shaft diameter of the engaging pin 38. The second engaging hole 39b is an elongated oval shape that extends along the vehicle width direction (radial). Engaging pins 38 are inserted into these engaging holes 39a and 39b, thereby temporarily securing the vehicle body 101 to the second retaining member 12b. Details regarding the function of this temporary securing will be explained below.

[0190] <Second Pivot Cover>

[0191] Figure 7 This is a plan view of the second pivot cover 40 as seen from below.

[0192] like Figure 5 , Figure 7 As shown, a second pivot cover 40 is mounted above the second retaining member 12b. The main structure of the second pivot cover 40 is as follows: a cover body 40a, which is annular when viewed axially; a discharge plate 40b, which extends from one side of the cover body 40a; a stepped cylindrical insertion portion 40c, which rises upward from the inner periphery of the cover body 40a; and a wall portion 40d, which rises upward from the outer periphery of the cover body 40a and the discharge plate 40b.

[0193] The insertion portion 40c is integrally formed by the first cylindrical portion 41 and the second cylindrical portion 42. The first cylindrical portion 41 stands upright from the cover body 40a, and the second cylindrical portion 42 is formed by reducing its diameter from the upper end of the first cylindrical portion 41 via a step portion 41a. The first cylindrical portion 41 fits into the outer peripheral surface of the outer cylindrical portion 25 of the second retaining member 12b. That is, the inner diameter of the first cylindrical portion 41 is approximately the same as or slightly larger than the outer diameter of the outer cylindrical portion 25 of the second retaining member 12b. The axial length of the first cylindrical portion 41 is approximately the same as the upward projection height of the outer cylindrical portion 25 from each of the support portions 21, 22, and 23.

[0194] Three press-in ribs 44 are formed on the inner circumferential surface of the first cylindrical portion 41. The press-in ribs 44 are formed across the entire axial direction of the first cylindrical portion 41 and are arranged at equal intervals along the circumferential direction. The press-in ribs 35 gently press the first cylindrical portion 41 into the outer circumferential surface of the outer cylindrical portion 25.

[0195] In the first cylindrical portion 41, a fitting portion 43 is integrally formed at the location of the second retaining member 12b corresponding to the fitting protrusion 29, which fits into the fitting protrusion 29. The fitting portion 43 protrudes downward from the first cylindrical portion 41. The fitting portion 43 is formed in a C-shape when viewed axially in a manner corresponding to the shape of the fitting protrusion 29. That is, the fitting portion 43 has: two side walls 43a facing each other in the circumferential direction; and an end wall 43b connecting the radially outer ends of the two side walls 43a to each other.

[0196] When the second pivot cover 40 is installed on the second retaining member 12b, the fitting portions 43 are fitted onto the three sides of the fitting protrusion 29 simultaneously with the fitting of the first cylindrical portion 41 into the outer cylindrical portion 25. This positions and fixes the second pivot cover 40 to the second retaining member 12b. Furthermore, since a press-in rib 44 is formed on the inner circumferential surface of the first cylindrical portion 41, the first cylindrical portion 41 is lightly pressed into the outer circumferential surface of the outer cylindrical portion 25. Therefore, the second pivot cover 40 is securely fixed to the second retaining member 12b without any wobbling.

[0197] The second cylindrical portion 42 fits into the outer peripheral surface of the inner cylindrical portion 24 of the second retaining member 12b. That is, the inner diameter of the second cylindrical portion 42 is approximately the same as or slightly larger than the outer diameter of the inner cylindrical portion 24 of the second retaining member 12b. The axial length of the second cylindrical portion 42 is approximately the same as the upward projection height of the inner cylindrical portion 24 from the outer cylindrical portion 25.

[0198] The discharge plate 40b, when viewed from the axial direction, is formed as a rectangular shape that is longer in the circumferential direction than the cover body 40a. An opening 40e is formed on the wall portion 40d, on the side of the discharge plate 40b opposite to the cover body 40a.

[0199] Based on this structure, the second pivot cover 40 prevents rainwater and the like from entering the wiper unit 1 through the second pivot 2b. Rainwater and the like collected by the cover body 40a of the second pivot cover 40 are discharged to the outside through the discharge plate 40b and the opening 40e.

[0200] The front end 2d of the second pivot 2b, rotatably supported by the second retaining member 12b, protrudes upward from the inner cylindrical portion 24. For example... Figure 2 , Figure 5 As shown, a toothed washer 45 is installed at the upwardly protruding portion. The toothed washer 45 restricts the axial movement of the second pivot 2b relative to the inner cylindrical portion 24.

[0201] On the other hand, the base end 2e of the second pivot 2b protrudes downward from the inner cylindrical portion 24. A connecting portion 4 is connected to the downwardly protruding portion.

[0202] <Connecting Section>

[0203] like Figure 2 , Figure 3 , Figure 5 As shown, the connecting part 4 includes: a rod 51, one end 51a of which is rotatably connected to the other end 9c of the first link arm 9 via a support pin 108; and a second link member 52, which connects the other end 51b of the rod 51 to the base end 2e of the second pivot 2b. The rod 51 is a plate member that is relatively long in the width direction of the vehicle body 101. More specifically, most of the central portion of the rod 51 in the length direction has a U-shaped cross-sectional shape in the vertical direction. The two ends 51a and 51b of the rod 51 are formed as plates parallel to the other end 9c of the first link arm 9.

[0204] The second link member 52 is a rectangular plate member that is longer in one direction when viewed axially. One end 52a of the second link member 52 is rotatably supported at the other end 51b of the link 51 via a support pin 109. The other end 52b of the second link member 52 is non-rotatably connected to the base end 2e of the second pivot 2b.

[0205] The second link member 52 is prevented from detaching from the second pivot 2b by a flange 2f formed at the base end 2e of the second pivot 2b. Based on this structure, the rotation of the output shaft 5a of the motor 5 with the speed reducer is transmitted to the second pivot 2b via the first link member 6, the rod 51 and the second link member 52.

[0206] <Regarding the injection molding of the second retaining member>

[0207] Next, based on Figure 4 The injection molding of the second retaining member 12b will be described.

[0208] The second retaining member 12b is formed by injecting molten resin into a mold (not shown). Molten resin is injected through a gate in the mold, and after hardening, the second retaining member 12b is removed from the mold. The location of the mold gate becomes a mark (resin injection mark) and remains on the second retaining member 12b. This mark is called an injection gate mark G.

[0209] like Figure 4 As shown, the molten resin injected from the gate gradually diffuses within the mold. At this time, the molten resin forming each support portion 21, 22, and 23 flows back from the inner circumferential surface 30i hole of the fixed cylinder 30b and the insertion hole 30c of the base bottom 30a to the radially outer ends (front ends) of each support portion 21, 22, and 23. Furthermore, the molten resin merges at the radially outer ends of the support portions 21, 22, and 23 (refer to arrow Y1). A protrusion 34 is formed at the radially outermost end of each merging support portion 21, 22, and 23 (the outer circumferential surface 30g of the fixed cylinder 30b and the circumferential center of the arcuate portion 30h formed in the base bottom 30a).

[0210] Here, since no protrusion 34 is formed at the outermost radial end of each support portion 21, 22, 23, the molten resin flowing at the outermost radial end of each support portion 21, 22, 23 loses its destination, resulting in poor flow of the molten resin. Therefore, the molten resin is difficult to cover all corners of the outermost radial end of the support portions 21, 22, 23, and weld seams may occur.

[0211] However, by forming protrusions 34 at the outermost radial ends of each support portion 21, 22, 23, the flow of resin at the outermost radial ends of each support portion 21, 22, 23 can be improved (refer to arrow Y2). As a result, the molten resin spreads to every corner of the outermost radial ends of the support portions 21, 22, 23, thereby suppressing the formation of weld seams.

[0212] Furthermore, the body portion 20 is integrally formed by the inner cylindrical portion 24, the outer cylindrical portion 25, and a plurality of ribs 26. The inner cylindrical portion 24 rotatably supports the second pivot 2b, the outer cylindrical portion 25 is formed to surround the inner cylindrical portion 24, and the plurality of ribs 26 are connected to the inner circumferential surface 25a of the outer cylindrical portion 25 and the outer circumferential surface 24a of the inner cylindrical portion 24. Therefore, the body portion 20 as a whole does not have any thick-walled sections, thus ensuring sufficient mechanical strength. Since the body portion 20 has no thick-walled sections, heat sink marks can be suppressed during resin molding of the body portion 20, thereby improving the molding accuracy of the body portion 20.

[0213] <Installation method for windshield wiper system>

[0214] Next, based on Figure 1 , Figure 2 , Figure 4 The installation method of wiper device 1 is explained.

[0215] like Figure 1 , Figure 2 , Figure 4 As shown, firstly, the engaging pin 38 of the first support portion 21 in the second retaining member 12b is inserted into the first engaging hole 39a formed in the body 101. Then, the engaging pin 38 of the third support portion 23 in the second retaining member 12b is inserted into the second engaging hole 39b formed in the body 101. This temporarily secures the body 101 to the second retaining member 12b.

[0216] Here, each locking pin 38 is integrally formed at the front end 37a of the foot 37 protruding from the rib 33 of the first support 21 and the third support 23. Therefore, when the locking pin 38 is inserted into the locking holes 39a, 39b of the vehicle body 101, the supports 21, 23 will not become an obstruction to the operator's view, and the position of the locking pin 38 can be easily identified. Thus, the locking pin 38 can be easily inserted into the locking holes 39a, 39b.

[0217] With the second retaining member 12b temporarily fixed to the vehicle body 101, the first retaining member 12a is fastened to the vehicle body 101 using bolts (not shown). Specifically, a bolt (not shown) is inserted into the bolt insertion hole 15 of the first retaining member 12a. Furthermore, a bolt is threaded into a female thread portion (not shown) formed on the vehicle body 101. Thus, the first retaining member 12a is fastened to the vehicle body 101.

[0218] The tightening of the bolts when securing the first retaining member 12a is transmitted to the second retaining member 12b via the connecting part 4 in the form of vibration. At this time, the second retaining member 12b is temporarily fixed to the vehicle body 101, so the position of the second retaining member 12b will not shift. Moreover, the operator does not need to worry about the position of the second retaining member 12b while performing the tightening operation of the first retaining member 12a to the vehicle body 101.

[0219] Here, the second retaining member 12b is engaged with the vehicle body 101 by two engaging pins 38. Therefore, although the engaging pins 38 are only inserted into the engaging holes 39a and 39b of the vehicle body 101, it is possible to reliably prevent the second retaining member 12b from rotating or shifting position around the engaging pins 38.

[0220] Next, the second retaining member 12b is fastened to the vehicle body 101 by bolts 105. Specifically, bolts 105 are inserted into the fixing sleeves 30b and insertion holes 30c of each support portion 21, 22, 23 in the second retaining member 12b. Furthermore, the female thread portion (not shown) formed on the vehicle body 101 is threaded with bolts 105.

[0221] Of the engagement holes 39a and 39b in the vehicle body 101, the first engagement hole 39a is circular when viewed axially. The inner diameter of the first engagement hole 39a is slightly larger than the shaft diameter of the engagement pin 38. On the other hand, the second engagement hole 39b is formed as an elongated oval shape in the vehicle width direction. Therefore, by using the first engagement hole 39a as a reference hole, the manufacturing errors of the vehicle body 101 or the windshield wiper device 1 can be absorbed by using the second engagement hole 39b.

[0222] Here, when the bolt 105 is tightened to the vehicle body 101, the protrusion 30e is bent and deformed by the flat washer 32 to absorb manufacturing errors of the collar 31 or the second retaining member 12b. This prevents wobbling when the second retaining member 12b is tightened to the vehicle body 101.

[0223] Through the above operations, the second retaining member 12b is fastened to the vehicle body 101, thereby completing the installation of the wiper device 1 onto the vehicle body 101.

[0224] <The operation of the windshield wiper system>

[0225] Next, the operation of the wiper unit 1 will be explained.

[0226] The output shaft 5a is rotated by driving a motor 5 with a speed reducer. The rotation of the output shaft 5a is transmitted to the first pivot 2a via the first connecting rod member 6. Thus, the first pivot 2a rotates in both forward and reverse directions within a specified rotation angle range.

[0227] The first link member 6 is also connected to the second pivot 2b via the connecting part 4. Therefore, the rotation of the output shaft 5a is transmitted to the second pivot 2b via the first link member 6, the rod 51, and the second link member 52. As a result, the second pivot 2b rotates in both forward and reverse directions within a predetermined rotation angle range.

[0228] Thus, through the first link member 6 and the connecting part 4, the rotation of the output shaft 5a is simultaneously transmitted to the two pivots 2a and 2b. Therefore, the two pivots 2a and 2b are driven to rotate synchronously.

[0229] Furthermore, the first retaining member 12a supporting the motor 5 with the speed reducer is mounted on the vehicle body 101 via a rubber mounting member 16. Therefore, vibrations from driving the motor 5 with the speed reducer are difficult to transmit to the vehicle body 101.

[0230] When the two pivots 2a and 2b are rotated, the wiper arms 104a and 104b connected to the front ends 2c and 2d of these pivots 2a and 2b respectively swing synchronously within a specified range on the windshield 102. As a result, the wiper blades 103a and 103b installed on each wiper arm 104a and 104b wipe the windshield 102.

[0231] Thus, the wiper device 1 includes: two pivots 2a and 2b; a drive unit 3 that drives the first pivot 2a to rotate; a connecting part 4 that connects the drive unit 3 and the second pivot 2b and drives the two pivots 2a and 2b to rotate synchronously; and two retaining members 12a and 12b. The wiper device 1 does not include a tube different from the rod 51 of the connecting part 4 that connects the two retaining members 12a and 12b to each other, as is the case in the past.

[0232] Based on this structure, the second retaining member 12b of the two retaining members 12a and 12b has three fixed portions 30 (first support portion 21, second support portion 22, and third support portion 23). Among the three support portions 21, 22, and 23, the first support portion 21 and the third support portion 23 are provided with body engagement portions 36. The second retaining member 12b is engaged with the body 101 by means of the body engagement portions 36.

[0233] Therefore, before fastening the two retaining members 12a and 12b to the vehicle body 101 with bolts, the second retaining member 12b can be temporarily fixed to the vehicle body 101 in advance by means of the vehicle body engaging part 36. Thus, by first performing the fastening operation of the first retaining member 12a to the vehicle body 101, it is possible to prevent the position of the second retaining member 12b from shifting during the fastening operation. As a result, the retaining members 12a and 12b of the wiper unit 1 can be installed with high precision in a short time.

[0234] Two locking pins 38 are provided on the second retaining member 12b. These two locking pins 38 engage the second retaining member 12b with the vehicle body 101. Therefore, although the locking pins 38 are only inserted into the locking holes 39a and 39b of the vehicle body 101, positional displacement such as rotation around the locking pins 38 can be effectively prevented. Thus, the retaining members 12a and 12b of the wiper unit 1 can be installed with high precision in a short time.

[0235] Because the wiper unit 1 can be installed on the vehicle body 101 with high precision in a short time, it can contribute to the United Nations-led Sustainable Development Goals (SDGs) Goal 7, "Ensuring that all people have access to affordable, reliable and sustainable modern energy," and Goal 9, "Building resilient infrastructure, promoting inclusive and sustainable industrialization and fostering innovation."

[0236] The drive unit 3 includes a motor 5 with a speed reducer and a first linkage member 6 that transmits the rotation of the output shaft 5a of the motor 5 with the speed reducer to the first pivot 2a. The connecting part 4 includes a rod 51 connected to the first linkage member 6 and a second linkage member 52 that connects the rod 51 to the second pivot 2b. Therefore, the rotation of the drive unit 3 can be transmitted to the two pivots 2a and 2b with high efficiency. Moreover, the two pivots 2a and 2b can be driven to rotate synchronously with high precision.

[0237] Because it enables the two pivots 2a and 2b to rotate synchronously with high precision, it can contribute to Goal 7 of the UN-led Sustainable Development Goals (SDGs): “Ensuring that all people have access to affordable, reliable and sustainable modern energy.”

[0238] As a mechanism (engaging claw) for engaging the second retaining member 12b to the vehicle body 101, an engaging pin 38 is used. Therefore, although the engaging pin 38 is only inserted into each engaging hole 39a, 39b of the vehicle body 101, the second retaining member 12b can be easily engaged to the vehicle body 101.

[0239] The fixed portion 30 of the second retaining member 12b protrudes radially from the body portion 20. The body engaging portion 36 of the second retaining member 12b has: a foot portion 37 integrally formed on the rib portion 33; and an engaging pin 38 integrally formed on the front end 37a of the foot portion 37. The foot portion 37 protrudes towards the second support portion 22 along the normal direction of the rib portion 33. Thus, the foot portion 37 protrudes outward from the fixed portion 30 in a direction intersecting the axial direction.

[0240] As a result, when viewing the second retaining member 12b from an axially superior position above the vehicle body 101, the engaging pin 38 can be easily identified. Therefore, the second retaining member 12b can be smoothly engaged with the vehicle body 101. Consequently, the wiper unit 1 can be installed with high precision in a shorter time.

[0241] The locking pin 38 is provided on the second retaining member 12b, but not on the first retaining member 12a on which the drive part 3 is provided. Therefore, the first retaining member 12a on the side of the first pivot 2a on which the drive part 3 is provided can be fixed first, and then the second pivot 2b on the side, which is lighter than the first pivot 2a side, can be temporarily fixed. As a result, the second retaining member 12b can be temporarily fixed more easily than the first retaining member 12a, and thus the wiper device 1 can be installed with high precision in a shorter time.

[0242] The second retaining member 12b includes three support portions 21, 22, and 23. Among these three support portions 21, 22, and 23, a locking pin 38 is provided on the side (rib 33) of the second support portion 22 of the first support portion 21 and the third support portion 23. The space between the first support portion 21 and the second support portion 22, and between the second support portion 22 and the third support portion 23, becomes the space occupied for mounting the second retaining member 12b to the vehicle body 101.

[0243] By effectively utilizing the space occupied by the locking pin 38, it is possible to prevent the space occupied for installing the second retaining member 12b from becoming further enlarged due to the locking pin 38. The second retaining member 12b can be configured with minimal space usage.

[0244] The second retaining member 12b is injection molded using resin, for example. Furthermore, injection gate marks G are formed on the outer cylindrical portion 25 side end of the base base 30a in each of the support portions 21, 22, and 23. On the other hand, a protrusion 34 is formed at the outermost radial end of each support portion 21, 22, and 23. Therefore, the flow of molten resin injected from the outer cylindrical portion 25 side end into each support portion 21, 22, and 23 at the outermost radial end can be improved. As a result, the molten resin reaches every corner of the outermost radial end of the support portions 21, 22, and 23, thereby suppressing the formation of weld seams.

[0245] The second retaining member 12b is linearly symmetrical with respect to the straight line L between the radial center of the connecting body portion 20 (the axis of the second pivot 2b) and the circumferential center of the fitting protrusion 29 (the second support portion 22). Therefore, for example, in a vehicle 100 where the driver's seat is on the left, where the windshield wiper device 1 is arranged linearly symmetrically with respect to the center of the vehicle width direction of the body 101, the second retaining member 12b can also be used. Thus, a highly versatile second retaining member 12b can be provided.

[0246] A fitting protrusion 29 is formed in the second retaining member 12b, and a fitting portion 43 is formed in the second pivot cover 40 to fit with the fitting protrusion 29. Therefore, when the second pivot cover 40 is installed on the second retaining member 12b, the first cylindrical portion 41 is fitted into the outer cylindrical portion 25, and the fitting portion 43 is fitted into the three sides of the fitting protrusion 29. As a result, the second pivot cover 40 can be easily positioned and fixed to the second retaining member 12b.

[0247] Furthermore, a press-in rib 44 is formed on the inner circumferential surface of the first cylindrical portion 41 in the second pivot cover 40. Therefore, the first cylindrical portion 41 can be gently pressed into the outer circumferential surface of the outer cylindrical portion 25 of the second retaining member 12b. As a result, the second pivot cover 40 can be securely fixed to the second retaining member 12b without any wobbling.

[0248] In the second retaining member 12b, three protrusions 30e are formed around the insertion hole 30c at the base 30a. Therefore, when the second retaining member 12b is fastened to the vehicle body 101 by bolts 105, the protrusions 30e are bent and deformed by the flat washer 32 tightened with the bolts 105, thus absorbing manufacturing errors of the collar 31 mounted on the second retaining member 12b or the second retaining member 12b itself. This prevents wobbling when the second retaining member 12b is fastened to the vehicle body 101.

[0249] The body portion 20 of the second retaining member 12b is integrally formed by an inner cylindrical portion 24, an outer cylindrical portion 25, and a plurality of ribs 26. The inner cylindrical portion 24 rotatably supports the second pivot 2b, the outer cylindrical portion 25 is formed to surround the inner cylindrical portion 24, and the plurality of ribs 26 are connected to the inner circumferential surface 25a of the outer cylindrical portion 25 and the outer circumferential surface 24a of the inner cylindrical portion 24. Therefore, since the body portion 20 as a whole has no wall thickness, the mechanical strength of the body portion 20 can be sufficiently ensured. Because the body portion 20 has no wall thickness, heat sink marks can be suppressed during resin molding of the body portion 20, and the molding accuracy of the body portion 20 can be improved.

[0250] Of the engagement holes 39a and 39b on the vehicle body 101, the first engagement hole 39a is circular when viewed axially. The inner diameter of the first engagement hole 39a is slightly larger than the shaft diameter of the engagement pin 38. On the other hand, the second engagement hole 39b is formed as an elongated oval shape in the vehicle width direction. Therefore, the first engagement hole 39a can be used as a reference hole, and the second engagement hole 39b can be used to absorb manufacturing errors in the vehicle body 101 or the windshield wiper device 1.

[0251] [First Variation]

[0252] <Second retaining member>

[0253] Next, based on Figure 8 The second retaining member 12b in the first modified example will be described below. In the following descriptions of the first and second modified examples, structures identical to those in the described embodiment will be labeled with the same symbols and their descriptions will be omitted.

[0254] Figure 8 This is a perspective view showing the second retaining member 12b in the first modified example.

[0255] In the described embodiment, the case where the first support portion 21 and the third support portion 23 of the second retaining member 12b have a body engaging portion 36 (foot portion 37 and engaging pin 38) protruding from the rib 33 toward the second support portion 22 will be explained. However, it is not limited to this, such as... Figure 8As shown, a body engaging portion 36 may also be formed on the radially outermost end of the first support portion 21 and the third support portion 23, i.e., on the extension line of the protrusion 34.

[0256] More specifically, the foot 37 of the body engaging portion 36 protrudes radially outward from the radially outer end of the protrusion 34. An engaging pin is integrally formed at the front end (radially outer end) of this foot 37.

[0257] Therefore, according to the first variation, it achieves the same effect as the aforementioned embodiment.

[0258] [Second variation]

[0259] <Second retaining member>

[0260] Next, based on Figure 9 The second retaining member 12b in the second modified example will be described.

[0261] Figure 9 This is a perspective view showing the second retaining member 12b in the second variation.

[0262] In the described embodiment, the first support portion 21 and the third support portion 23 of the second retaining member 12b are provided with body engagement portions 36 (foot portion 37 and engagement pin 38) protruding from the rib 33 toward the second support portion 22. The method of temporarily fixing the second retaining member 12b to the body 101 by inserting the engagement pins 38 of these body engagement portions 36 into the engagement holes 39a and 39b of the body 101 is also described.

[0263] But it is not limited to this, such as Figure 9 As shown, the body engaging portion 36 may not be formed in each of the support portions 21, 22, and 23. Instead, the sizes of the fixing cylinders 231a, 231b, and 231c formed in each of the support portions 21, 22, and 23, and the insertion holes 232a, 232b, and 232c communicating with the base bottom 30a of each fixing cylinder 231a, 231b, and 231c may be different.

[0264] More specifically, the first fixing cylinder 231a in the first support portion 21 is formed into a cylindrical shape. The first insertion hole 232a in the base bottom 30a of the first support portion 21 is formed into a circular shape when viewed from the axial direction. The inner diameter of the first fixing cylinder 231a and the inner diameter of the first insertion hole 232a are larger than the bolts 105 (see reference) inserted into these first fixing cylinders 231a and the first insertion holes 232a. Figure 3 The shaft diameter is slightly larger than that of the shaft.

[0265] The second fixing cylinder 231b in the second support portion 22 is formed into a cylindrical shape. The second insertion hole 232b in the base 30a of the second support portion 22 is formed into a circular shape when viewed from the axial direction. The inner diameter of the second fixing cylinder 231b and the inner diameter of the second insertion hole 232b are larger than the inner diameter of the first fixing cylinder 231a and the inner diameter of the first insertion hole 232a.

[0266] The third fixing cylinder 231c in the third support part 23 is formed into an elongated cylindrical shape that is longer in the vehicle width direction (radial) when viewed axially. The third insertion hole 232c at the base 30a in the third support part 23 is formed into an elongated cylindrical shape that is longer in the vehicle width direction (radial) when viewed axially.

[0267] The collars 233a, 233b, and 233c pressed into each of the fixed cylinders 231a, 231b, and 231c are formed in a shape corresponding to the shape of the fixed cylinders 231a, 231b, and 231c respectively.

[0268] Based on this structure, the first fixing cylinder 231a and the first insertion hole 232a of the three fixing cylinders 231a, 231b, and 231c and the three insertion holes 232a, 232b, and 232c are used as reference holes for fastening the second retaining member 12b to the vehicle body 101. A detailed description follows.

[0269] <Installation method for windshield wiper system>

[0270] Next, quote Figure 1 ,based on Figure 9 The installation method of the wiper device 1 in the second modified example will be described.

[0271] like Figure 1 , Figure 9 As shown, firstly, a bolt 105 is inserted into the first fixing sleeve 231a and the first insertion hole 232a of the second retaining member 12b, and the bolt 105 is screwed into a female thread (not shown) formed on the vehicle body 101. At this time, the bolt 105 is temporarily tightened, and the second retaining member 12b is slightly loosened around the bolt 105. Thus, the second retaining member 12b is temporarily fixed to the vehicle body 101.

[0272] With the second retaining member 12b temporarily fixed to the vehicle body 101, the first retaining member 12a is fastened to the vehicle body 101 using bolts (not shown). Specifically, a bolt (not shown) is inserted into the bolt insertion hole 15 of the first retaining member 12a. Furthermore, a bolt is threaded into a female thread portion (not shown) formed on the vehicle body 101. Thus, the first retaining member 12a is fastened to the vehicle body 101.

[0273] The tightening of the bolts when securing the first retaining member 12a is transmitted to the second retaining member 12b via the connecting part 4 in the form of vibration. At this time, the second retaining member 12b is temporarily fixed to the vehicle body 101, so the position of the second retaining member 12b will not shift significantly. Moreover, the operator does not need to worry about the position of the second retaining member 12b while performing the tightening operation of the first retaining member 12a to the vehicle body 101.

[0274] Manufacturing errors in the vehicle body 101 or wiper device 1 that occur when the first retaining member 12a is fastened to the vehicle body 101 are absorbed by the second retaining member 12b, the second retaining cylinder 231b, the third retaining cylinder 231c, and the second insertion hole 232b and the third insertion hole 232c. That is, the second retaining member 12b rotates around the bolt 105 inserted into the first retaining cylinder 231a and the first insertion hole 232a, centered on the manufacturing errors in the vehicle body 101 or wiper device 1. Thus, the manufacturing errors in the vehicle body 101 or wiper device 1 are absorbed by the second retaining member 12b.

[0275] Thus, the first fixing cylinder 231a and the first insertion hole 232a become reference holes for fastening the second retaining member 12b to the vehicle body 101. The inner diameter of the first fixing cylinder 231a and the inner diameter of the first insertion hole 232a are slightly larger than the shaft diameter of the bolt 105, so the wobble relative to the bolt 105 is also small.

[0276] The inner diameters of the second fixing cylinder 231b and the second insertion hole 232b are larger than the inner diameters of the first fixing cylinder 231a and the first insertion hole 232a. Furthermore, the third insertion hole 232c in the base 30a of the third support portion 23, when viewed axially, is an elongated oval shape that is longer along the vehicle width direction (radial). Therefore, the bolts 105 can be inserted into each fixing cylinder 231b, 231c and each insertion hole 232b, 232c at the position reached by slightly rotating the second retaining member 12b from the fixed position, and the bolts 105 are screwed into the female thread portion (not shown) formed on the vehicle body 101. At this time, all three bolts 105 are tightened.

[0277] Through the above operations, the second retaining member 12b is fastened to the vehicle body 101, thereby completing the installation of the wiper device 1 onto the vehicle body 101.

[0278] Therefore, according to the second variation, it achieves the same effect as the aforementioned embodiment.

[0279] Furthermore, the present invention is not limited to the described embodiments, but includes embodiments that are modified by applying various changes to the described embodiments without departing from the spirit of the present invention.

[0280] For example, the embodiment described herein is for a vehicle 100 where the driver's seat is located on the right side. However, it is not limited thereto, and the windshield wiper device 1 is also suitable for a vehicle 100 where the driver's seat is located on the left side.

[0281] In the described embodiment, the case where a motor 5 with a speed reducer is used as the drive source for the drive unit 3 has been explained. The case where the motor unit 7 of the motor 5 with a speed reducer is used, for example, a servo motor has been explained. However, it is not limited to this; any drive that rotates each pivot 2a, 2b is acceptable. For example, the speed reducer 8 can be omitted, and only the motor unit 7 can be used; alternatively, various brushless motors can be used as the motor unit 7 instead of a servo motor.

[0282] In the described embodiment, a structure in which only the second retaining member 12b uses three support portions 21, 22, and 23 is presented. However, it is not limited to this; a structure in which the first retaining member 12a uses three support portions 21, 22, and 23 may also be used. Alternatively, a structure in which the three support portions 21, 22, and 23 are used only in the first retaining member 12a, instead of the second retaining member 12b.

[0283] In the described embodiment, the case where three support portions 21, 22, and 23 are provided on the second retaining member 12b has been illustrated. However, it is not limited to this; at least two support portions are sufficient for the second retaining member 12b. Furthermore, three or more support portions 21, 22, and 23 may also be provided on the second retaining member 12b. When there are two support portions, locking pins 38 can be provided on these two support portions. When there are three or more support portions, a structure of a fixed portion 30 and a locking pin 38 can be used on at least two support portions.

[0284] In the described embodiment, the three support portions 21, 22, and 23 of the second retaining member 12b are described as protruding radially outward from the body portion 20 that rotatably supports the second pivot 2b. However, it is not limited to this, and the three support portions 21, 22, and 23 may extend in a direction intersecting the axial direction of the second pivot 2b.

[0285] In the described embodiment, the case where three protrusions 30e are formed on the base 30a of the three support portions 21, 22, and 23 of the second retaining member 12b is described. The case where three press-in ribs 35 are formed on the inner circumferential surface 30i of the fixing cylinder 30b of the three support portions 21, 22, and 23 is described. The case where three press-in ribs 44 are formed on the second pivot cover 40 is described. However, this is not a limitation; the number of protrusions 30e or the number of press-in ribs 35 and 44 can be arbitrarily set.

[0286] In the described embodiment, the use of a locking pin 38 as a mechanism for engaging the second retaining member 12b with the vehicle body 101 has been explained. However, it is not limited to this; any structure capable of engaging the second retaining member 12b with the vehicle body 101 can be provided on the second retaining member 12b. For example, a hook-shaped claw or the like can be used instead of the locking pin 38.

[0287] In the described embodiment, bolts 105 or the like are used as fixing members 12a and 12b to the vehicle body 101. However, this is not a limitation; any fixing member is sufficient to fix each retaining member 12a and 12b to the vehicle body 101. For example, rivets or the like may be used instead of bolts 105.

[0288] In the described embodiment, the case where the first retaining member 12a and the first pivot cover 17 are separate entities has been described. The case where the second retaining member 12b and the second pivot cover 40 are separate entities has also been described. However, this is not a limitation; each retaining member 12a, 12b and its corresponding pivot cover 17, 40 may also be integrally formed.

[0289] In the described embodiment, the drive unit 3 includes a motor 5 with a speed reducer and a first link member 6 that transmits the rotation of the output shaft 5a of the motor 5 with the speed reducer to the first pivot 2a. However, it is not limited to this, and the drive unit 3 can be any structure that drives the first pivot 2a.

[0290] In the described embodiment, the connecting part 4 includes a rod 51 connected to the first connecting member 6 and a second connecting member 52 connecting the rod 51 to the second pivot 2b. However, it is not limited to this, and any structure that connects the driving part 3 and the second pivot 2b, and drives the two pivots 2a and 2b to rotate synchronously, is acceptable.

[0291] In the described embodiment, the body engaging portion 36, which has a foot portion 37 and an engaging pin 38, is provided on the side (rib 33) of the second support portion 22 side of the first support portion 21 and the third support portion 23. However, it is not limited to this, and the placement of the body engaging portion 36 can be arbitrarily set without considering the space occupied by the second retaining member 12b, etc.

Claims

1. A windshield wiper device, characterized in that, include: Two pivots connect to the wiper arms respectively; The drive unit rotates the first of the two pivots. A connecting part connects the second pivot of the two pivots and the driving part, so that the two pivots rotate synchronously. A first retaining member is used to secure the first pivot to the vehicle body; as well as A second retaining member is used to secure the second pivot to the vehicle body; The second retaining member includes: The main body rotatably supports the second pivot; and A plurality of support portions, including a first support portion, a second support portion, and a third support portion, which are provided protruding from the body portion along a direction intersecting the axial direction of the second pivot and arranged circumferentially along the body portion, and the first support portion, the second support portion, and the third support portion are arranged in sequence, wherein the first support portion and the third support portion each include: The fixed part is fixed to the vehicle body via a fixing member; and A locking claw, disposed on the fixed part, engages with the vehicle body, and The engaging claw of the first support portion is disposed on the side of the first support portion adjacent to the second support portion, and the engaging claw of the third support portion is disposed on the side of the third support portion adjacent to the second support portion.

2. The wiper device according to claim 1, characterized in that, The drive unit includes: A motor having an output shaft; and The first linkage connects the output shaft to the first pivot, transmitting the rotation of the output shaft to the first pivot. The connecting part includes: A rod, one end of which is connected to the first connecting rod member; and The second linkage member connects the other end of the rod to the second pivot, and transmits the rotation of the output shaft to the second pivot via the rod.

3. The wiper device according to claim 1 or 2, characterized in that, The engaging claw has a pin that is inserted into a hole formed in the vehicle body.

4. The wiper device according to claim 1 or 2, characterized in that, The fixed portion protrudes from the body portion in a direction intersecting the axial direction of the corresponding pivot. The fixed part has a foot that protrudes outward from the fixed part in a direction intersecting the axis of the pivot. The engaging claw is located at the outer end of the foot.

5. The wiper device according to claim 1 or 2, characterized in that, The second retaining member, which is used to secure the second pivot to the vehicle body, is made of resin. The second retaining member includes: Injection gate marks are formed on the side end of the body portion of the fixed part; and A protrusion is formed at one end of the fixed portion that is opposite to the body portion, protruding toward the side opposite to the body portion.

6. A windshield wiper device, characterized in that, include: Two pivots connect to the wiper arms respectively; The drive unit rotates the first of the two pivots. A connecting part connects the second pivot of the two pivots and the driving part, so that the two pivots rotate synchronously. as well as Two retaining members, including a first retaining member and a second retaining member, are used to fix the first pivot and the second pivot to the vehicle body, respectively. The second retaining member includes: The main body, which rotatably supports the corresponding pivot; and Multiple support parts protrude from the main body. At least two of the plurality of support portions include: The fixed part is fixed to the vehicle body via a fixing member; and The engaging claw is disposed on the fixed part and engages with the vehicle body. The second retaining member is formed of resin, and the second retaining member includes: Injection gate marks are formed on the side end of the body portion of the fixed part; and A protrusion is formed at one end of the fixed portion opposite to the body portion, protruding toward the side opposite to the body portion.

7. The wiper device according to claim 6, characterized in that, The drive unit includes: A motor having an output shaft; and The first linkage connects the output shaft to the first pivot, transmitting the rotation of the output shaft to the first pivot. The connecting part includes: A rod, one end of which is connected to the first connecting rod member; and The second linkage member connects the other end of the rod to the second pivot, and transmits the rotation of the output shaft to the second pivot via the rod.

8. The wiper device according to claim 6 or 7, characterized in that, The engaging claw has a pin that is inserted into a hole formed in the vehicle body.

9. The wiper device according to claim 6 or 7, characterized in that, The fixed portion protrudes from the body portion in a direction intersecting the axial direction of the corresponding pivot. The fixed part has a foot that protrudes outward from the fixed part in a direction intersecting the axis of the pivot. The engaging claw is located at the outer end of the foot.

Images