Wiper device

Abstract

To restrict inclination angle of a wiper blade by a wiper arm adequately while restraining chatter from being generated when wiping the wiper blade.SOLUTION: First and second block side approach route walls WL1, WL3 and first and second block side return path walls WL2, WL4 are disposed on both sides of a pair of holding pawls, respectively, in the longitudinal direction of a wiper blade 40 and second return path side inclination walls 75b, 79b are abutted against a first connection wall part 51a and moreover first return path side inclination walls 76a, 80a are abutted against a second connection wall part 51b when the wiper blade 40 is inclined in one direction with respect to a wiper arm 30 of the wiper blade 40 and first approach route side inclination walls 75a, 79a are abutted against the first connection wall part 51a and moreover second return path side inclination walls 76b, 80b are abutted against the second connection part 51b when the wiper blade 40 is inclined to other direction with respect to the wiper arm 30 of the wiper blade 40.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present invention relates to a wiper device including a wiper arm and a wiper blade. [Background technology]

[0002] Patent Document 1 describes a wiper device in which the wiper blade can be tilted relative to the wiper arm during reciprocating wiping operations. This ensures that the corners at the tip of the lip are in sliding contact with the wiping surface during both forward and backward wiping operations, thereby preventing chatter from occurring in the blade rubber. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-058990 Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology described in Patent Document 1, a clip member having a first inclined surface and a second inclined surface is fixed to a U-shaped hook provided at the tip of an arm piece, and a connecting pin of a vertebra holder is rotatably connected to the clip member. The clip member is provided with first and second inclined surfaces on the forward and backward sides, respectively, and these first and second inclined surfaces abut against the inner wall portion of the vertebra holder as the wiper blade tilts relative to the wiper arm during reciprocating wiping operation.

[0005] In addition, a groove to which the connecting pin is rotatably connected is provided near the longitudinal tip of the clip member, and the vertebra holder is rotatable around the connecting pin. When the wiper blade performs a reciprocating wiping operation, the vertebra holder rotates relative to the clip member to follow the curved shape of the wiping surface.

[0006] In the technology described in Patent Document 1, the clip member is fixed to the wiper arm (arm piece). Therefore, when the wiper arm rotates around the connecting pin during the reciprocating wiping operation of the wiper blade, the clip member also rotates integrally with the wiper arm. As a result, the inclination direction of the first and second inclined surfaces of the clip member relative to the inner wall of the vertebra holder varies depending on the rotation angle. This may make it difficult to appropriately regulate the inclination angle of the wiper blade.

[0007] An object of the present invention is to provide a wiper device that can more appropriately regulate the tilt angle of the wiper blade while suppressing chattering during wiping with the wiper blade. [Means for solving the problem]

[0008] In one aspect of the wiper device, there is provided a wiper device including a wiper arm having a first connecting portion, and a wiper blade having a second connecting portion connected to the first connecting portion and configured to wipe a surface to be wiped, the first connecting portion and the second connecting portion being connected to each other so as to be rotatable about an axis extending in a wiping direction of the wiper blade, the wiper arm including a first side wall portion and a second side wall portion that are disposed opposite each other in the wiping direction of the wiper blade and support the first connecting portion in the wiping direction of the wiper blade, the wiper blade including a first opposing wall portion that fits inside the first side wall portion and the second side wall portion and that faces the first side wall portion and a second opposing wall portion that faces the second side wall portion, the first opposing wall portion and the second opposing wall portion being located on both sides of the second connecting portion in the longitudinal direction of the wiper blade, and the first opposing wall portion and the second opposing wall portion are respectively arranged on the wiping surface side and have a first inclined surface that is arranged on the wiping surface side and faces the wiping surface side, and a second inclined surface that is arranged on the opposite side from the wiping surface side and faces the opposite side from the wiping surface side, the wiper blade is tiltable in the wiping direction of the wiper blade relative to the wiper arm, and when the wiper blade is tilted in one direction relative to the wiper arm, the second inclined surface of the first opposing wall portion abuts against the first side wall portion, and the first inclined surface of the second opposing wall portion abuts against the second side wall portion, and when the wiper blade is tilted in the other direction relative to the wiper arm, the first inclined surface of the first opposing wall portion abuts against the first side wall portion, and the second inclined surface of the second opposing wall portion abuts against the second side wall portion. [Effects of the Invention]

[0009] According to the present invention, it is possible to realize a wiper device that can more appropriately regulate the tilt angle of the wiper blade while suppressing chattering during wiping by the wiper blade. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a perspective view of the wiper device as seen from the front side. [Figure 2]2 is a cross-sectional view of the wiper device taken along the dashed circle A in FIG. 1 in the longitudinal direction. [Figure 3] FIG. 3 is a cross-sectional view taken along line BB in FIG. 2. [Figure 4] FIG. 3 is a cross-sectional view taken along line CC in FIG. 2. [Figure 5] 10A to 10C are diagrams illustrating a procedure for connecting the wiper arm and the wiper blade. [Figure 6] FIG. 6 is an enlarged view of a portion D circled by a dashed line in FIG. 5. [Figure 7] FIG. 2 is a perspective view showing the connecting member alone as viewed from the front side. [Figure 8] FIG. 8 is a view taken along arrow E in FIG. 7. [Figure 9] FIG. 8 is a view taken along the arrow F in FIG. 7. [Figure 10] 10A and 10B are diagrams illustrating an inclined state of the wiper blade during forward wiping. [Figure 11] 10A and 10B are diagrams illustrating an inclined state of the wiper blade during backward wiping. [Figure 12] 10A and 10B are diagrams illustrating a state of a connecting portion of the wiper blade during wiping. [Figure 13] FIG. 10 is a diagram showing one state of the connecting portion during maintenance. [Figure 14] 10A and 10B are diagrams showing other states of the connecting portion during maintenance. DETAILED DESCRIPTION OF THE INVENTION

[0011] An embodiment of the present invention will be described in detail below with reference to the drawings.

[0012] Figure 1 is an oblique view of the wiper device as seen from the front side, Figure 2 is a cross-sectional view along the longitudinal direction of the wiper device at the dashed circle A in Figure 1, Figure 3 is a cross-sectional view along line BB in Figure 2, Figure 4 is a cross-sectional view along line CC in Figure 2, Figure 5 is a diagram showing the procedure for connecting the wiper arm and wiper blade, Figure 6 is an enlarged view of the dashed circle D in Figure 5, Figure 7 is an oblique view from the front side showing the connecting member alone, Figure 8 is a view as seen from the arrow E in Figure 7, and Figure 9 is a view as seen from the arrow F in Figure 7.

[0013] <Wiper device> 1 to 4 is for wiping a rear window GS provided on a back door (not shown) of a vehicle such as an automobile. The wiper device 10 includes an arm head 20 fixed to a rotary shaft (not shown) of a wiper motor mounted on the back door, a wiper arm 30 whose base end (right side in FIG. 1) is rotatably connected to the arm head 20, and a wiper blade 40 whose longitudinal center is rotatably connected to the tip end (left side in FIG. 1) of the wiper arm 30.

[0014] The rear glass GS corresponds to the wiping surface in the present invention.

[0015] The arm head 20 includes a head body (not shown), which is firmly fixed to the rotary shaft of the wiper motor with a fastening nut (not shown). As a result, by driving the wiper motor to rotate the rotary shaft in forward and reverse directions, the wiper arm 30 and the wiper blade 40 perform a reciprocating wiping operation on the rear window GS.

[0016] 1, the arm head portion 20 is provided with a resin cover member 21. The cover member 21 covers and conceals the head body and the fastening nut, thereby preventing the head body and the fastening nut from being exposed to the outside, thereby improving the overall appearance of the wiper device 10.

[0017] <Wiper arm> 1 to 6, the wiper arm 30 is formed into a generally rod-like shape by injection molding a resin material such as plastic, and the cross-sectional shape of the wiper arm 30 along the wiping direction of the wiper blade 40 is generally U-shaped.

[0018] The wiper arm 30 includes a top wall portion 31 and an outward-moving side wall portion 32a and a return-moving side wall portion 32b formed integrally on both short sides of the top wall portion 31. That is, the outward-moving side and return-moving side wall portions 32a, 32b of the wiper arm 30 are arranged opposite each other in the wiping direction of the wiper blade 40 (left and right sides in FIGS. 3 and 4).

[0019] The outgoing-path wall portion 32a is disposed on the outgoing-path side in the wiping direction of the wiper blade 40 (the left side in FIGS. 3 and 4), and the returning-path wall portion 32b is disposed on the returning-path side in the wiping direction of the wiper blade 40 (the right side in FIGS. 3 and 4). The top wall portion 31 is disposed on the opposite side of the outgoing-path and returning-path walls 32a, 32b from the rear windshield GS side (the upper side in FIGS. 3 and 4). As a result, the wiper arm 30, which has a substantially U-shaped cross section, opens on the rear windshield GS side (the lower side in FIGS. 3 and 4).

[0020] 1 and 5, an arm connector 33 is integrally provided on the base end side of the wiper arm 30, i.e., on the arm head 20 side of the wiper arm 30 (right side in the figures). The arm connector 33 protrudes from the base ends of the top wall 31 and the forward-path and backward-path wall portions 32a, 32b toward the arm head 20, and is rotatably connected to a head shaft (not shown) provided on the head main body. Here, the wiper arm 30 rotatably connected to the head shaft can rise up relative to the arm head 20 in a direction away from the rear window GS.

[0021] Furthermore, an arm tip 34 that gradually tapers toward the tip of the wiper arm 30 is integrally formed on the tip side (left side in the figure) of the wiper arm 30. Here, as shown in Fig. 1, the arm tip 34 is disposed near the wiper blade 40, but the arm tip 34 does not come into contact with the wiper blade 40 during the wiping operation of the wiper device 10. Therefore, the wiping performance of the wiper device 10 is not reduced and the wiper blade 40 is not damaged.

[0022] As shown in Figure 5, a spring hook 35 is integrally formed on the inside of the wiper arm 30 near the arm connecting portion 33. The tip end of a tension spring (not shown) can be hooked onto the spring hook 35. The spring force of the tension spring acts to press the wiper blade 40 toward the rear window GS with a predetermined pressure. The spring hook 35 is integrally formed with the top wall 31 and the outward-traveling-side and inward-traveling-side wall portions 32a, 32b, ensuring sufficient strength.

[0023] Furthermore, a reinforcing rib 36 formed in a generally mesh pattern is integrally provided on the inside of the wiper arm 30 in the longitudinal center thereof. The reinforcing rib 36 protrudes at a predetermined height on the inside of the wiper arm 30 and is integrally provided with the top wall 31 and the outward-side and inward-side wall portions 32a, 32b. This increases the strength of the wiper arm 30 while reducing its weight.

[0024] <Arm side connecting member> Furthermore, an arm-side connecting member 50 is integrally provided on the inside of the wiper arm 30 near the arm tip 34. Specifically, the arm-side connecting member 50 is disposed between the arm tip 34 and the reinforcing rib 36 in the longitudinal direction of the wiper arm 30. The arm-side connecting member 50 includes a first connecting wall 51 a, a second connecting wall 51 b, and a connecting shaft 52.

[0025] The connecting shaft portion 52 corresponds to the first connecting portion and the connecting shaft in this invention.

[0026] Here, the first connecting wall 51a is disposed on the outgoing wiping side of the wiper blade 40 (left side in FIGS. 3 and 4), and the second connecting wall 51b is disposed on the returning wiping side of the wiper blade 40 (right side in FIGS. 3 and 4). The connecting shaft 52 extends in the wiping direction of the wiper blade 40 (left and right sides in FIG. 3), and is disposed between the first connecting wall 51a and the second connecting wall 51b.

[0027] The first connecting wall portion 51a and the second connecting wall portion 51b are arranged opposite each other in the wiping direction of the wiper blade 40 and support the connecting shaft portion 52 in the wiping direction of the wiper blade 40, with the first connecting wall portion 51a corresponding to the first side wall portion in the present invention and the second connecting wall portion 51b corresponding to the second side wall portion in the present invention.

[0028] As shown in FIG. 6, the first connecting wall 51a is provided adjacent to the outgoing path wall 32a, and both longitudinal sides (left and right sides in the figure) of the first connecting wall 51a are integrally connected to the outgoing path wall 32a. One axial side (the outgoing path in the wiping direction) of the connecting shaft 52 is also integrally connected to the first connecting wall 51a. An outgoing path gap G1 is formed between the first connecting wall 51a and the outgoing path wall 32a, and the outgoing path gap G1 functions as a material reduction gap to prevent sink marks and voids from occurring during injection molding of the wiper arm 30. Providing the outgoing path gap G1 also contributes to reducing the weight of the wiper arm 30.

[0029] The second connecting wall 51b is provided adjacent to the backward-path wall 32b, and both longitudinal sides (left and right sides in the figure) of the second connecting wall 51b are connected to the backward-path wall 32b so as to be integral with each other. Furthermore, the other axial side (the backward side in the wiping direction) of the connecting shaft 52 is connected to the second connecting wall 51b so as to be integral with each other. A backward-path gap G2 is formed between the second connecting wall 51b and the backward-path wall 32b, and the backward-path gap G2 also functions as a material removal mechanism similar to the outward-path gap G1, and also contributes to reducing the weight of the wiper arm 30.

[0030] 6, the surfaces of the first and second connecting wall portions 51a, 51b facing the rear windshield GS are provided with a first side wall end portion 53 and a second side wall end portion 54 that extend parallel to the surfaces of the pair of outward-side and inward-side wall portions 32a, 32b facing the rear windshield GS when viewed from the wiping direction of the wiper blade 40. The first side wall end portion 53 and the second side wall end portion 54 are arranged in a direction away from the rear windshield GS with respect to the surfaces of the pair of outward-side and inward-side wall portions 32a, 32b facing the rear windshield GS.

[0031] First and second tip-side abutment portions 53a and 54a are provided on the longitudinal tip sides (left side in the figure) of the first and second side-wall ends 53 and 54, respectively. First and second base-side abutment portions 53b and 54b are provided on the longitudinal base sides (right side in the figure) of the first and second side-wall ends 53 and 54, respectively. The first and second tip-side abutment portions 53a and 54a and the first and second base-side abutment portions 53b and 54b can abut against first and second tip-side inclined surfaces 65a and 66a and first and second base-side inclined surfaces 65b and 66b (see FIG. 8) provided on the blade-side connecting member 60 that forms the wiper blade 40, respectively, during maintenance of the wiper device 10 (when the pair of retaining claws 71 are removed from the connecting shaft 52).

[0032] Here, the first and second tip-side abutment portions 53a, 54a are disposed between the arm tip portion 34 and the connecting shaft portion 52 in the longitudinal direction of the wiper arm 30. The first and second base-side abutment portions 53b, 54b are disposed on the opposite side of the connecting shaft portion 52 from the arm tip portion 34 in the longitudinal direction of the wiper arm 30. Furthermore, the first and second connecting walls 51a, 51b and the connecting shaft portion 52 (arm-side connecting member 50) are covered and hidden by the outward-path and return-path wall portions 32a, 32b when the wiper arm 30 is viewed from the wiping direction of the wiper blade 40. This also improves the overall appearance of the wiper device 10.

[0033] <Wiper blades> 1 to 5, the wiper blade 40 that wipes the rear window GS is rotatably connectable to an arm-side connecting member 50 provided at the tip end of the wiper arm 30. The wiper blade 40 includes a blade rubber 41, a pair of vertebras 42 attached to the blade rubber 41, a pair of rubber holders 43 that hold the pair of vertebras 42, a pair of end caps 44 that cover the ends of the pair of rubber holders 43, and a blade-side connecting member 60 that holds the pair of vertebras 42 and is rotatably connected to the arm-side connecting member 50.

[0034] 3 and 4, the blade rubber 41 includes a blade body 41a held by a pair of vertebrae 42, and a lip portion 41b that comes into sliding contact with the rear glass GS. A neck portion 41c is provided between the blade body 41a and the lip portion 41b. The neck portion 41c is narrower than the lip portion 41b and is more flexible than the lip portion 41b. This allows the lip portion 41b to be easily tilted when the blade rubber 41 performs a reciprocating wiping operation over the rear glass GS, and as a result, the first and second corners CN1 and CN2 at the tip of the lip portion 41b thoroughly wipe away rainwater, dust, and the like adhering to the rear glass GS.

[0035] The blade rubber 41 is provided over the entire longitudinal area of ​​the wiper blade 40, and the cross-sectional shape of the wiper blade 40 along the wiping direction is the same over the entire longitudinal area of ​​the blade rubber 41. A pair of grooves 41d extending in the longitudinal direction of the blade rubber 41 is provided on the forward and backward sides of the blade body 41a. Approximately half of the vertebra 42 along the width direction (the wiping direction of the wiper blade 40) is fitted into each of the pair of grooves 41d. As a result, the blade rubber 41 is held by the pair of rubber holders 43 and the blade side connecting member 60 via the pair of vertebras 42.

[0036] The pair of vertebras 42 are formed in the shape of long, thin rods and have the function of leaf springs, and are held by a pair of rubber holders 43 and a blade-side connecting member 60. The pair of vertebras 42 are provided over the entire longitudinal area of ​​the wiper blade 40, and their length dimension is approximately equal to the length dimension of the blade rubber 41.

[0037] The pair of vertebras 42 are curved to have a predetermined curvature in a free state where no external force is applied. Specifically, the curvature of the pair of vertebras 42 is smaller than the curvature of the rear window GS. This allows the entire longitudinal area of ​​the lip portion 41b to be in close contact with the rear window GS in accordance with the curvature of the rear window GS. This ensures sufficient wiping performance of the wiper blade 40.

[0038] In addition, the remaining approximately half of the pair of vertebras 42 that does not enter the groove portion 41d is held by a pair of rubber holder side holding claws 43a (see Figure 4) provided on the rubber holder 43 and a pair of first and second connecting member side holding claws 63a, 63b (see Figures 3 and 9) provided on the blade side connecting member 60.

[0039] 3, an engagement groove 42a is provided in each of the pair of vertebrae 42 at the longitudinal center, and a pair of engagement protrusions 64 provided on the blade side connecting member 60 is hooked into these engagement grooves 42a. As a result, the pair of vertebrae 42 are restricted from moving in the longitudinal direction relative to the blade side connecting member 60, that is, are prevented from coming off.

[0040] Furthermore, cap fixing grooves (not shown) are provided on both longitudinal sides of the pair of vertebras 42, and engaging protrusions (not shown) provided on the inside of the end caps 44 are engaged with these cap fixing grooves. As a result, the pair of end caps 44 are fixed in a locked state on both longitudinal sides of the pair of vertebras 42. Therefore, the rubber holders 43 respectively arranged between the blade side connecting member 60 and the pair of end caps 44 are also locked in a locked state.

[0041] Here, a pair of rubber holders 43 holding a pair of vertebras 42 cover the side of the blade rubber 41 opposite to the rear window GS side, and conceal the pair of vertebras 42 and the blade body 41a of the blade rubber 41. This also improves the overall appearance of the wiper device 10.

[0042] The pair of rubber holders 43 are made of a flexible plastic material or the like, and are easily elastically deformable. This allows the pair of rubber holders 43 to easily follow the curved shape of the vertebra 42, and therefore does not reduce the wiping performance of the wiper blade 40.

[0043] 1 and 5, the longitudinal center of each rubber holder 43 of the wiper blade 40 serves as a pressing portion PS1, PS2 (see the shaded portion) that is pressed by the user during maintenance of the wiper device 10. Specifically, the pressing portions PS1, PS2 are provided in positions in the longitudinal direction of the rubber holder 43 that are easy for the user to grip (position their fingers on).

[0044] The pressing portion PS1 is disposed on the opposite side (base end side of the wiper blade 40) to the side where the first and second tip-side abutting portions 53a, 54a (see FIG. 6) of the arm-side connecting member 50 and the first and second tip-side inclined surfaces 65a, 66a (see FIG. 8) of the blade-side connecting member 60 are disposed, with the axis CT (see FIG. 2) sandwiched between them in the longitudinal direction of the wiper blade 40. The pressing portion PS2 is disposed on the opposite side (tip side of the wiper blade 40) to the side where the first and second base-side abutting portions 53b, 54b (see FIG. 6) of the arm-side connecting member 50 and the first and second base-side inclined surfaces 65b, 66b (see FIG. 8) of the blade-side connecting member 60 are disposed, with the axis CT (see FIG. 2) sandwiched between them in the longitudinal direction of the wiper blade 40. The pressing portions PS1 and PS2 are portions that are pressed in a direction to separate the wiper blade 40 from the wiper arm 30 when the wiper blade 40 is removed from the wiper arm 30.

[0045] A method for performing the maintenance work (maintenance work for the wiper device 10) of removing the wiper blade 40 from the wiper arm 30 by pressing the pressing portion PS1 or the pressing portion PS2 will be described in detail later.

[0046] <Blade side connecting member> 2 to 5 and 7 to 9, the blade side connecting member 60, which is rotatably connected to the arm side connecting member 50, is made of a resin material such as plastic and is formed in a substantially rectangular parallelepiped shape so as to extend in the longitudinal direction of the wiper blade 40. Specifically, the blade side connecting member 60 includes a vertebra holding portion 61 and a connecting main body portion 70 formed integrally with the vertebra holding portion 61.

[0047] The blade side connecting member 60 corresponds to the connecting member in this invention.

[0048] <Vertebra holder> 7 to 9, the vertebra holder 61 is wider than the connecting main body 70 in the wiping direction of the wiper blade 40 (left-right direction in FIG. 9). On the other hand, the vertebra holder 61 is lower in height than the connecting main body 70 in the direction perpendicular to the rear window GS (up-down direction in FIG. 9). In other words, the vertebra holder 61 is thinner than the connecting main body 70, which allows the overall height of the wiper device 10 to be kept low.

[0049] The vertebra holder 61 is disposed on the rear window GS side of the blade-side connecting member 60, and holds the blade rubber 41 that wipes the rear window GS via a pair of vertebras .

[0050] The vertebra holder 61 corresponds to the blade holder of this invention.

[0051] 8 and 9, the vertebra holder 61 has a first bulge 62a and a second bulge 62b that bulge on both sides (upper and lower sides in FIG. 8 and left and right sides in FIG. 9) in the wiping direction of the wiper blade 40, with the connecting main body 70 at the center. The first bulge 62a is located on the forward wiping direction side of the wiper blade 40, and the second bulge 62b is located on the backward wiping direction side of the wiper blade 40.

[0052] A first connecting member side holding claw 63a that holds the vertebra 42 arranged on the forward path side is integrally provided on the rear window GS side (lower side in Figure 9) of the first bulging portion 62a. An engaging protrusion 64 that is hooked into an engaging groove 42a (see Figure 3) provided in the vertebra 42 is provided in the center of the first connecting member side holding claw 63a in the longitudinal direction of the wiper blade 40.

[0053] A second connecting member side holding claw 63b that holds the vertebra 42 arranged on the return path side is integrally provided on the rear window GS side (lower side in Figure 9) of the second bulging portion 62b. An engaging protrusion 64 that is hooked into an engaging groove 42a (see Figure 3) provided in the vertebra 42 is provided in the center of the second connecting member side holding claw 63b in the longitudinal direction of the wiper blade 40.

[0054] 8, a first inclined surface 65 is provided on the side of the first bulging portion 62a opposite to the rear windshield GS so as to extend in the longitudinal direction of the vertebra holding portion 61. The first inclined surface 65 is inclined so as to gradually decrease in height from the connecting main body portion 70 toward the outward wiping direction of the wiper blade 40. In other words, the first inclined surface 65 is inclined so as to approach the rear windshield GS as it moves away from the connecting main body portion 70 in the wiping direction of the wiper blade 40. A first tip-side inclined surface 65a and a first base-side inclined surface 65b (see the shaded portions) are arranged on both longitudinal sides of the first inclined surface 65.

[0055] The first inclined surface 65 corresponds to the inclined surface according to the present invention.

[0056] The first and second tip side inclined surfaces 65a, 66a of the blade side connecting member 60 are provided on the side of the blade side connecting member 60 opposite to the rear glass GS side, and correspond to the abutment portion in the present invention.

[0057] Specifically, the first tip-side inclined surface 65a is an inclined surface that is inclined toward the forward wiping direction of the wiper blade 40, so as to approach the rear windshield GS as it moves away from the connecting main body 70. In addition, the first tip-side inclined surface 65a is an inclined surface that is inclined toward the tip side of the longitudinal direction of the blade-side connecting member 60, so as to approach the rear windshield GS as it moves away from the pair of holding claws 71.

[0058] The first tip-side inclined surface 65a is capable of being abutted against the first tip-side abutment portion 53a (see FIG. 6) of the arm-side connecting member 50 during maintenance of the wiper device 10. More specifically, the first tip-side abutment portion 53a is capable of being in line contact with the first tip-side inclined surface 65a during maintenance of the wiper device 10.

[0059] Furthermore, the first base-end-side inclined surface 65b is an inclined surface that is inclined toward the forward wiping direction of the wiper blade 40, so as to approach the rear window GS as it moves away from the connecting main body 70. Moreover, the first base-end-side inclined surface 65b is an inclined surface that is inclined toward the base end side of the longitudinal direction of the blade-side connecting member 60, so as to approach the rear window GS as it moves away from the pair of holding claws 71.

[0060] The first base-end side inclined surface 65b can be abutted against the first base-end side abutment portion 53b (see FIG. 6) of the arm-side connecting member 50 during maintenance of the wiper device 10. More specifically, the first base-end side abutment portion 53b can be in line contact with the first base-end side inclined surface 65b during maintenance of the wiper device 10.

[0061] 8, a second inclined surface 66 is provided on the side of the second bulging portion 62b opposite to the rear windshield GS so as to extend in the longitudinal direction of the vertebra holding portion 61. The second inclined surface 66 is inclined so that its height gradually decreases from the connecting main body portion 70 toward the backward wiping direction of the wiper blade 40. In other words, the second inclined surface 66 is inclined so that it approaches the rear windshield GS as it moves away from the connecting main body portion 70 in the wiping direction of the wiper blade 40. A second tip-side inclined surface 66a and a second base-side inclined surface 66b (see the shaded portions) are arranged on both longitudinal sides of the second inclined surface 66.

[0062] The second inclined surface 66 corresponds to the inclined surface of the present invention.

[0063] Specifically, the second tip-side inclined surface 66a is an inclined surface that is inclined toward the backward wiping direction of the wiper blade 40, so as to approach the rear windshield GS as it moves away from the connecting main body 70. In addition, the second tip-side inclined surface 66a is an inclined surface that is inclined toward the tip side of the longitudinal direction of the blade-side connecting member 60, so as to approach the rear windshield GS as it moves away from the pair of holding claws 71.

[0064] The second tip-side inclined surface 66a is capable of being abutted against the second tip-side abutment portion 54a (see FIG. 6) of the arm-side connecting member 50 during maintenance of the wiper device 10. More specifically, the second tip-side abutment portion 54a is capable of being in line contact with the second tip-side inclined surface 66a during maintenance of the wiper device 10.

[0065] Furthermore, the second base-end side inclined surface 66b is an inclined surface that is inclined toward the backward wiping direction of the wiper blade 40, so as to approach the rear window GS as it moves away from the connecting main body 70. Moreover, the second base-end side inclined surface 66b is an inclined surface that is inclined toward the base end side of the longitudinal direction of the blade-side connecting member 60, so as to approach the rear window GS as it moves away from the pair of holding claws 71.

[0066] The second base-end side inclined surface 66b can be abutted against the second base-end side abutment portion 54b (see FIG. 6) of the arm-side connecting member 50 during maintenance of the wiper device 10. More specifically, the second base-end side abutment portion 54b can be in line contact with the second base-end side inclined surface 66b during maintenance of the wiper device 10.

[0067] Here, in the first and second bulging portions 62a, 62b, the ends of the rubber holder 43 are inserted into the tip end portion T1 (left side in Figure 8) where the first and second tip end side inclined surfaces 65a, 66a are provided, and the base end portion T2 (right side in Figure 8) where the first and second base end side inclined surfaces 65b, 66b are provided, as shown in Figure 2.

[0068] That is, the ends of the rubber holder 43 are arranged on the opposite side (toward the rear window GS) of the first and second tip-side inclined surfaces 65a, 66a and the opposite side (toward the rear window GS) of the first and second base-side inclined surfaces 65b, 66b at the tip end T1 and the base end T2, respectively. Also, the first and second tip-side inclined surfaces 65a, 66a and the first and second base-side inclined surfaces 65b, 66b are provided on the opposite side (toward the rear window GS) of the tip end T1 and the base end T2, respectively.

[0069] In this way, the first and second bulging portions 62a, 62b have the function of covering and concealing the ends of the rubber holder 43. This also improves the overall appearance of the wiper device 10. Furthermore, by sandwiching the rubber holder 43 between the first and second bulging portions 62a, 62b and the end cap 44, the rubber holder 43 is prevented from falling off the pair of vertebras 42 and blade rubber 41.

[0070] The tip end T1 and the base end T2 are provided on both longitudinal sides of the vertebra holding portion 61, and cover the ends of the pair of rubber holders 43. That is, the tip end T1 and the base end T2 correspond to the holder covering portion in the present invention.

[0071] In addition, the tip end T1 is positioned in the longitudinal direction of the wiper blade 40 at a position corresponding to the first and second block side outward walls WL1 and WL3, and the base end T2 is positioned in the longitudinal direction of the wiper blade 40 at a position corresponding to the first and second block side return walls WL2 and WL4.

[0072] <Connecting body> 7 to 9, the connecting body 70 is formed in a substantially rectangular parallelepiped shape. The connecting body 70 fits between the first connecting wall 51a and the second connecting wall 51b of the arm side connecting member 50 (see FIG. 6), and is rotatably connectable to the connecting shaft 52 of the arm side connecting member 50 (see FIG. 6).

[0073] In other words, the connecting body 70 functions as an adapter that connects the wiper arm 30 and the wiper blade 40. The connecting body 70 is disposed on the opposite side of the vertebra holding part 61 from the rear window GS side, and corresponds to the adapter part in the present invention.

[0074] A pair of retaining claws 71 is provided in the longitudinal center of the connecting body 70. These retaining claws 71 protrude away from the rear glass GS and are arranged opposite to each other in the longitudinal direction of the wiper blade 40. Each of the pair of retaining claws 71 is flexible in the longitudinal direction of the wiper blade 40. Therefore, as shown in FIG. 2, the connecting shaft 52 can be attached to the inside of the pair of retaining claws 71 by snap fitting.

[0075] Specifically, as shown by the dashed-dotted arrow M in Figure 5, the pair of retaining claws 71 are brought into contact with the connecting shaft 52 from the rear glass GS side (the lower side in Figure 2), causing the connecting shaft 52 to elastically deform the pair of retaining claws 71. As a result, the connecting shaft 52 is inserted inside the pair of retaining claws 71. Note that in Figure 2, the inserting direction of the connecting shaft 52 into the pair of retaining claws 71 is the direction opposite to the rear glass GS side. The connecting shaft 52 connected to the pair of retaining claws 71 is rotatable about the axis CT (see Figures 2 and 3).

[0076] In this way, the connecting shaft portion 52 and the pair of holding claws 71 are connected to each other so as to be rotatable about the axis CT extending in a direction perpendicular to the longitudinal direction of the wiper blade 40.

[0077] The pair of holding claws 71 correspond to the second connecting portion in the present invention.

[0078] Furthermore, the connecting shaft 52 does not move in the longitudinal direction or wiping direction of the wiper blade 40 relative to the pair of retaining claws 71, but is tiltable in clockwise and counterclockwise directions around the tilting center SA inside the pair of retaining claws 71. Specifically, the tilt angle of the connecting shaft 52 relative to the pair of retaining claws 71 about the tilting center SA is α degrees (e.g., 3 degrees) in both the clockwise and counterclockwise directions from the state shown in FIG. 3 (a state in which the wiper blade 40 is not tilted relative to the wiper arm 30). The tilting center SA is located on the axis CT and in the longitudinal center of the connecting shaft 52.

[0079] As shown in Figure 7, a groove 72 is provided at the base of the pair of retaining claws 71, i.e., on the vertebra holder portion 61 side in the extension direction of the pair of retaining claws 71, so as to extend in the wiping direction of the wiper blade 40. The groove 72 is disposed between the pair of retaining claws 71 in the longitudinal direction of the wiper blade 40, thereby making the pair of retaining claws 71 more likely to bend. The groove 72 has a substantially semicircular cross section along the longitudinal direction of the wiper blade 40. This allows the stress acting on the base of the pair of retaining claws 71 to be dispersed, preventing the base of the pair of retaining claws 71 from being damaged due to stress concentration.

[0080] <First block section> 7 and 8, a first block portion 73 formed in a substantially hollow box shape is provided on the longitudinal tip side (left side in the drawings) of the connecting main body 70, centered around the pair of retaining claws 71. By making the first block portion 73 substantially hollow and box-shaped, deformation of the first block portion 73 due to sink marks or voids is suppressed during injection molding of the blade-side connecting member 60. The first block portion 73 is located between the first connecting wall portion 51a and the second connecting wall portion 51b of the arm-side connecting member 50 and is located closer to the tip side of the wiper arm 30 than the connecting shaft portion 52.

[0081] Here, a first gap 74 is provided between the first block portion 73 and the retaining claw 71 in the longitudinal direction of the wiper blade 40. The first gap 74 is a gap that allows elastic deformation of the retaining claw 71.

[0082] 7 to 9, a first block-side outward path wall WL1 is provided on the outward path side of the first block portion 73 in the wiping direction of the wiper blade 40. The first block-side outward path wall WL1 is configured to fit inside the first connecting wall portion 51a and the second connecting wall portion 51b and to face the first connecting wall portion 51a.

[0083] The first block-side outward path wall WL1 includes a first outward path inclined wall 75a and a second outward path inclined wall 75b. Specifically, the first outward path inclined wall 75a is disposed on the rear window GS side of the first block portion 73, and the second outward path inclined wall 75b is disposed on the side of the first block portion 73 opposite to the rear window GS side.

[0084] 4, the first and second outward-path inclined walls 75a, 75b are both inclined at a gentle inclination angle α degrees (e.g., 3 degrees) with respect to the vertical direction of the rear windshield GS. The first outward-path inclined wall 75a faces the rear windshield GS, and the second outward-path inclined wall 75b faces the opposite side from the rear windshield GS. A first outward-path apex 75c is provided between the first outward-path inclined wall 75a and the second outward-path inclined wall 75b, and the first outward-path apex 75c protrudes most toward the outward wiping direction of the wiper blade 40. The first outward-path apex 75c extends parallel to the longitudinal direction of the wiper blade 40.

[0085] The first block side outward wall WL1 corresponds to the first opposing wall portion in the present invention, the first outward side inclined wall 75a corresponds to the first inclined surface in the present invention, the second outward side inclined wall 75b corresponds to the second inclined surface in the present invention, and the first outward side apex 75c corresponds to the apex in the present invention.

[0086] 7 to 9, a first block-side return wall WL2 is provided on the return side of the first block portion 73 in the wiping direction of the wiper blade 40. The first block-side return wall WL2 is configured to fit inside the first connecting wall portion 51a and the second connecting wall portion 51b and to face the second connecting wall portion 51b.

[0087] The first block-side return wall WL2 includes a first return inclined wall 76a and a second return inclined wall 76b. Specifically, the first return inclined wall 76a is disposed on the rear window GS side of the first block portion 73, and the second return inclined wall 76b is disposed on the side of the first block portion 73 opposite the rear window GS.

[0088] Furthermore, like the first and second outward-moving inclined walls 75a, 75b, the first and second inward-moving inclined walls 76a, 76b are inclined at an inclination angle of α degrees with respect to the perpendicular direction of the rear windshield GS. The first inward-moving inclined wall 76a faces toward the rear windshield GS, and the second inward-moving inclined wall 76b faces away from the rear windshield GS. A first inward-moving apex 76c is provided between the first inward-moving inclined wall 76a and the second inward-moving inclined wall 76b, and the first inward-moving apex 76c protrudes most toward the inward wiping direction of the wiper blade 40. Here, the first inward-moving apex 76c extends parallel to the longitudinal direction of the wiper blade 40.

[0089] The first block side return wall WL2 corresponds to the second opposing wall portion in the present invention, the first return side inclined wall 76a corresponds to the first inclined surface in the present invention, the second return side inclined wall 76b corresponds to the second inclined surface in the present invention, and the first return side apex 76c corresponds to the apex in the present invention.

[0090] <Second Block> 7 and 8, a second block portion 77 formed in a generally hollow box shape, similar to the first block portion 73, is provided on the longitudinal base end side (right side in the drawings) of the connecting body portion 70, with the pair of retaining claws 71 at the center. That is, the first block portion 73 and the second block portion 77 are arranged on both sides of the pair of retaining claws 71 in the longitudinal direction of the wiper blade 40. The second block portion 77 is located between the first connecting wall portion 51a and the second connecting wall portion 51b of the arm-side connecting member 50 and is located closer to the base end side of the wiper arm 30 than the connecting shaft portion 52.

[0091] Here, a second gap 78 is provided between the second block portion 77 and the retaining claw 71 in the longitudinal direction of the wiper blade 40. Similar to the first gap 74, the second gap 78 also allows elastic deformation of the retaining claw 71.

[0092] 7 to 9, a second block-side outward path wall WL3 is provided on the outward path side of the second block portion 77 in the wiping direction of the wiper blade 40. The second block-side outward path wall WL3 is configured to fit inside the first connecting wall portion 51a and the second connecting wall portion 51b and to face the first connecting wall portion 51a.

[0093] The second block-side outward path wall WL3 includes a first outward path inclined wall 79a and a second outward path inclined wall 79b. Specifically, the first outward path inclined wall 79a is disposed on the rear window GS side of the second block portion 77, and the second outward path inclined wall 79b is disposed on the side of the second block portion 77 opposite to the rear window GS side.

[0094] Furthermore, like the first and second outward-path inclined walls 75a, 75b, the first and second outward-path inclined walls 79a, 79b are also inclined at an inclination angle of α degrees with respect to the perpendicular direction of the rear windshield GS. The first outward-path inclined wall 79a faces the rear windshield GS, and the second outward-path inclined wall 79b faces the opposite side from the rear windshield GS. A second outward-path apex 79c is provided between the first outward-path inclined wall 79a and the second outward-path inclined wall 79b, and the second outward-path apex 79c protrudes most toward the outward wiping direction of the wiper blade 40. The second outward-path apex 79c extends parallel to the longitudinal direction of the wiper blade 40.

[0095] The second block side outward wall WL3 corresponds to the first opposing wall portion in the present invention, the first outward side inclined wall 79a corresponds to the first inclined surface in the present invention, the second outward side inclined wall 79b corresponds to the second inclined surface in the present invention, and the second outward side apex 79c corresponds to the apex in the present invention.

[0096] 7 to 9, a second block-side return wall WL4 is provided on the return side of the second block portion 77 in the wiping direction of the wiper blade 40. The second block-side return wall WL4 is positioned inside the first connecting wall portion 51a and the second connecting wall portion 51b and faces the second connecting wall portion 51b.

[0097] In addition, the second block side return path wall WL4 includes a first return path side inclined wall 80a and a second return path side inclined wall 80b. Specifically, the first return path side inclined wall 80a is arranged on the rear glass GS side of the second block portion 77, and the second return path side inclined wall 80b is arranged on the side opposite to the rear glass GS side of the second block portion 77.

[0098] Furthermore, in the first and second return path side inclined walls 80a and 80b as well, similar to the first and second forward path side inclined walls 75a and 75b, they are inclined at an inclination angle of α degrees with respect to the vertical direction of the rear glass GS. And the first return path side inclined wall 80a faces the rear glass GS side, and the second return path side inclined wall 80b faces the side opposite to the rear glass GS side. Also, between the first return path side inclined wall 80a and the second return path side inclined wall 80b, a second return path side top 80c that protrudes most on the return path side of the wiping direction of the wiper blade 40 is provided. Here, the second return path side top 80c extends parallel to the longitudinal direction of the wiper blade 40.

[0099] ​​​​​​​​​Note that the first and second block portions 73 and 77 are mirror-symmetrical with respect to the longitudinal direction of the wiper blade 40, sandwiching the pair of holding claws 71 therebetween. Therefore, in FIG. 9, the first and second forward path side inclined walls 79a and 79b and the second forward path side top portion 79c of the second block portion 77, and the first and second return path side inclined walls 80a and 80b and the second return path side top portion 80c of the second block portion 77 are indicated by reference numerals in parentheses.

[0102] Also, as shown in FIG. 8, in the wiping direction of the wiper blade 40, the distance between the first forward path side top portion 75c and the first return path side top portion 76c, and the distance between the second forward path side top portion 79c and the second return path side top portion 80c are both W1. The distance W1 is substantially equal to the distance between the first connecting wall portion 51a and the second connecting wall portion 51b (see FIG. 6) of the wiper arm 30 in the wiping direction of the wiper blade 40. Therefore, rattling of the wiper blade 40 with respect to the wiper arm 30 is suppressed in the wiping direction of the wiper blade 40.

[0103] Furthermore, as shown in FIG. 8, in the wiping direction of the wiper blade 40, the width dimension of the pair of holding claws 71 is W2, which is smaller than the above-described distance W1 (W2 < W1). That is, the pair of holding claws 71 are disposed at positions recessed in the wiping direction of the wiper blade 40 from the first and second block side forward path walls WL1 and WL3 and the first and second block side return path walls WL2 and WL4.

[0104] As a result, a predetermined gap CL (see FIG. 3) is provided between the pair of holding claws 71 and the first and second connecting wall portions 51a and 51b in the wiping direction of the wiper blade 40. Here, as shown in FIG. 6, when the wiper arm 30 is injection-molded, a parting line PL (only the side of the second connecting wall portion 51b is shown in the figure) is generated on the surfaces of the first and second connecting wall portions 51a and 51b by a mold for forming the connecting shaft portion 52. Therefore, by providing the predetermined gap CL, contact between the pair of holding claws 71 and the parting line PL of the wiper arm 30 can be prevented.

[0105] This allows the inclined walls (75a, 75b, 76a, 76b, 79a, 79b, 80a, 80b) to reliably abut against the first and second connecting walls 51a, 51b, regardless of the presence or absence of the parting line PL. Therefore, it is possible to incline the wiper blade 40 at a predetermined angle relative to the wiper arm 30 regardless of molding errors, thereby improving the wiping performance of the wiper device 10.

[0106] As shown in Figures 7 and 9, the ends 75d, 76d, 79d, 80d on the rear window GS side of the first and second block side outward path walls WL1, WL3 and the first and second block side return path walls WL2, WL4 and the ends 75e, 76e, 79e, 80e on the opposite side from the rear window GS side each extend parallel to the longitudinal direction of the wiper blade 40.

[0107] This increases the area of ​​each inclined wall (75a, 75b, 76a, 76b, 79a, 79b, 80a, 80b), thereby ensuring a sufficient contact area between the first connecting wall portion 51a and the second connecting wall portion 51b of the wiper arm 30. This improves the accuracy of regulating the inclination angle of the wiper blade 40 relative to the wiper arm 30.

[0108] <Back and forth wiping action> FIG. 10 shows the inclined state of the wiper blade during forward wiping, and FIG. 11 shows the inclined state of the wiper blade during backward wiping.

[0109] When the rotary shaft (not shown) of the wiper motor is rotated in the forward direction, the wiper device 10 performs a forward wiping operation as shown by the dashed arrow in Fig. 10. As a result, the wiper blade 40 is tilted counterclockwise (in one direction) with respect to the wiper arm 30 about the tilt center SA as shown by the solid arrow. At this time, the tilt angle of the wiper blade 40 with respect to the wiper arm 30 is α degrees with respect to the neutral state shown in Figs. 3 and 4.

[0110] In this way, when the wiper device 10 is performing the forward wiping operation, the connecting main body portion 70 forming the blade side connecting member 60 can be tilted in the wiping direction of the wiper blade 40 inside the first and second connecting wall portions 51a, 51b provided on the wiper arm 30.

[0111] When the wiper blade 40 is tilted counterclockwise around the tilt center SA in the wiping direction of the wiper blade 40 relative to the wiper arm 30, the second outward-way inclined walls 75b, 79b of the first and second block-side outward-way walls WL1, WL3 abut against the first connecting wall portion 51a. Also, the first backward-way inclined walls 76a, 80a of the first and second block-side backward-way walls WL2, WL4 abut against the second connecting wall portion 51b.

[0112] 10, the first corner portion CN1 at the tip of the lip portion 41b of the blade rubber 41 is in reliable sliding contact with the rear glass GS, thereby suppressing chattering of the blade rubber 41 and thoroughly wiping away rainwater, dust, and the like adhering to the rear glass GS.

[0113] Furthermore, when the rotary shaft (not shown) of the wiper motor is rotated in the reverse direction, the wiper device 10 is reversed from the position (forward wiping) shown in Fig. 10 and performs a backward wiping operation as shown by the dashed arrow in Fig. 11. As a result, the wiper blade 40 is tilted clockwise (the other direction) with respect to the wiper arm 30 about the tilt center SA as shown by the solid arrow. At this time, the tilt angle of the wiper blade 40 with respect to the wiper arm 30 is α degrees × 2 (approximately 6 degrees) with respect to the state shown in Fig. 10.

[0114] In this way, when the wiper device 10 performs the backward wiping operation, the connecting main body portion 70 forming the blade side connecting member 60 can be tilted in the wiping direction of the wiper blade 40 inside the first and second connecting wall portions 51a, 51b provided on the wiper arm 30.

[0115] When the wiper blade 40 is tilted clockwise around the tilt center SA in the wiping direction of the wiper blade 40 relative to the wiper arm 30, the first outward-way inclined walls 75a, 79a of the first and second block-side outward-way walls WL1, WL3 abut against the first connecting wall portion 51a. Also, the second backward-way inclined walls 76b, 80b of the first and second block-side backward-way walls WL2, WL4 abut against the second connecting wall portion 51b.

[0116] 11, the second corner CN2 at the tip of the lip portion 41b of the blade rubber 41 comes into sliding contact with the rear glass GS at an appropriate contact angle, thereby suppressing chattering of the blade rubber 41 and thoroughly wiping away rainwater, dust, and the like adhering to the rear glass GS.

[0117] In Figures 10 and 11, as in Figure 9, the first and second outward-side inclined walls 79a, 79b and the second outward-side apex 79c of the second block portion 77, and the first and second return-side inclined walls 80a, 80b and the second return-side apex 80c of the second block portion 77 are indicated by symbols in parentheses.

[0118] 10 and 11, during the wiping operation of the wiper blade 40 in the wiper device 10, the wiper blade 40 and the wiper arm 30 are rotated clockwise and counterclockwise around the axis CT by a rotation angle β degrees (approximately 5 degrees) in accordance with the curvature of the rear glass GS, as shown in Fig. 12. At this time, the tip end and base end of the wiper blade 40 do not come into contact with the wiper arm 30, ensuring sufficient wiping performance of the wiper blade 40.

[0119] Furthermore, first and second block portions 73, 77 having inclined walls (75a, 75b, 76a, 76b, 79a, 79b, 80a, 80b) on the forward and backward movement sides are provided near the connecting shaft portion 52 and the pair of retaining claws 71, which are centered on the axis CT. Specifically, in the longitudinal direction of the wiper blade 40, the inclined walls (75a, 75b, 76a, 76b, 79a, 79b, 80a, 80b) are arranged on both sides of the connecting shaft portion 52 and the pair of retaining claws 71 and on the forward and backward movement sides.

[0120] 12, even when the wiper blade 40 and the wiper arm 30 rotate clockwise and counterclockwise by a rotation angle β degrees about the axis CT, the blade rubber 41 of the wiper blade 40 and each of the inclined walls (75a, 75b, 76a, 76b, 79a, 79b, 80a, 80b) operate as a single unit. In other words, even when the rotation angle of the wiper blade 40 and the wiper arm 30 changes, the inclination direction of each of the inclined walls (75a, 75b, 76a, 76b, 79a, 79b, 80a, 80b) with respect to the longitudinal direction of the wiper blade 40 does not change.

[0121] Therefore, the inclination angle of the wiper blade 40 relative to the wiper arm 30 can be more appropriately regulated during the wiping operation of the wiper blade 40.

[0122] <Standing up> FIG. 12 is a diagram showing the state of the connecting portion of the wiper blade during wiping.

[0123] 12, when the user grasps and lifts the tip end of the wiper arm 30, the wiper blade 40 is also lifted up relative to the rear windshield GS. This causes the wiper blade 40 to move (stand up) in a direction away from the rear windshield GS, making it possible to, for example, remove snow that has accumulated on the rear windshield GS.

[0124] At this time, the wiper arm 30 can be lifted by a lifting load UP in a direction substantially perpendicular to the rear windshield GS. Here, the lifting load UP is a force large enough to resist the spring force of a tension spring (not shown). Note that a pulling load FR required to pull the connecting shaft portion 52 (see FIG. 2) of the arm-side connecting member 50 out of the pair of retaining claws 71 (see FIG. 2) of the blade-side connecting member 60 is sufficiently larger than the lifting load UP. Therefore, for example, even if the wiper blade 40 is stuck to the rear windshield GS due to freezing, the wiper blade 40 will not easily come off the wiper arm 30 simply by lifting the wiper arm 30 and lifting the wiper blade 40 and the wiper arm 30 up relative to the rear windshield GS.

[0125] As shown in Figure 12, when wiping with the wiper blade 40 before the wiper arm 30 is lifted, the first and second tip end abutment portions 53a, 54a and the first and second base end abutment portions 53b, 54b (see Figure 6) of the arm side connecting member 50 do not come into contact with the first and second tip end inclined surfaces 65a, 66a and the first and second base end inclined surfaces 65b, 66b (see Figure 8) of the blade side connecting member 60.

[0126] <Maintenance work> FIG. 13 is a diagram showing one state of the connecting portion during maintenance, and FIG. 14 is a diagram showing another state of the connecting portion during maintenance.

[0127] To perform maintenance on the wiper device 10, such as replacing the wiper blade 40 or the blade rubber 41 of the wiper blade 40, it is necessary to remove the wiper blade 40 from the wiper arm 30. Specifically, as shown in Fig. 12, the user first grasps and lifts the tip end of the wiper arm 30, thereby separating the wiper blade 40 from the rear window GS (pulling it up in the upright direction).

[0128] As a result, the wiper blade 40 and the wiper arm 30 can be rotated about the axial center CT in the clockwise and counterclockwise directions relative to each other by a rotation angle γ degrees (about 7 degrees), which is larger than the rotation angle β degrees (see FIG. 12), as shown in FIG. 13 (γ degrees > β degrees). That is, the wiper blade 40 can be rotated relative to the wiper arm 30 beyond the rotation angle β degrees. This is because the state in which the rotation of the wiper blade 40 is restricted by the rear glass GS is released.

[0129] Next, the wiper blade 40 is separated from the rear glass GS, and the wiper blade 40 is rotated relative to the wiper arm 30 beyond the rotation angle β degrees. Then, the pressing portion PS1 of the rubber holder 43 disposed on the proximal end side of the wiper blade 40 is pressed, and the wiper blade 40 is moved in the direction of separating from the wiper arm 30 as indicated by the white arrow.

[0130] Then, since the wiper blade 40 is rotated relative to the wiper arm 30 beyond the rotation angle β degrees, the first and second distal end side abutting portions 53a, 54a (see FIG. 6) of the arm side connecting member 50 are abutted against the first and second distal end side inclined surfaces 65a, 66a (see FIG. 8) of the blade side connecting member 60 in line contact.

[0131] In addition, in the state where the first and second distal end side abutting portions 53a, 54a and the first and second distal end side inclined surfaces 65a, 66a are in contact with each other (the state shown in FIG. 13), even if the arm distal end portion 34 is brought into contact with the wiper blade 40, the arm distal end portion 34 is not brought into contact with the wiper blade 40 with a strong force. Therefore, the wiper blade 40 is not damaged.

[0132] Thereafter, as shown in FIG. 13, by further pressing down the pressing portion PS1 of the rubber holder 43, the wiper blade 40 is detached from the wiper arm 30 with a pressing load FL (FL < FR) that is smaller than the pulling load FR (see FIG. 12) required to pull out the connecting shaft portion 52 (see FIG. 2) from the pair of holding claws 71 (see FIG. 2).

[0133] Here, the position of the pressing portion PS1 becomes the "effort point" of the lever principle, the position where the first and second tip-side abutting portions 53a and 54a and the first and second tip-side inclined surfaces 65a and 66a are abutted becomes the "fulcrum (reference symbol P1 in the figure)" of the lever principle, and the position where the connecting shaft portion 52 and the pair of holding claws 71 are connected (the position of the axis CT) becomes the "point of application" of the lever principle.

[0134] As shown in FIG. 13, in the longitudinal direction of the wiper blade 40, the length of the first line segment L1 connecting the position of the axis CT (point of application) and the position where the first and second tip-side abutting portions 53a and 54a and the first and second tip-side inclined surfaces 65a and 66a are abutted (the fulcrum at the longitudinal center position of the position abutted by line contact) is shorter than the length of the second line segment L2 connecting the position of the pressing portion PS1 (effort point) and the position where the first and second tip-side abutting portions 53a and 54a and the first and second tip-side inclined surfaces 65a and 66a are abutted (the fulcrum at the longitudinal center position of the position abutted by line contact) (L1 < L2). Thereby, the lever principle of setting the pressing load FL < the pulling load FR is realized.

[0135] Furthermore, the length of the third line segment L3 connecting the position of the axis CT (point of application) and the position of the connecting member base end portion 67 on the opposite side of the first and second tip-side inclined surfaces 65a and 66a in the longitudinal direction of the blade-side connecting member 60 is equal to or greater than the length of the first line segment L1 (L1 ≦ L3). Since it is assumed that the user holds the rubber holder 43 during maintenance of the wiper device 10, in most cases, the pressing portion PS1 is arranged on the base end side in the longitudinal direction rather than the blade-side connecting member 60. Therefore, by setting L1 ≦ L3, the difference between the length of the second line segment L2 and the length of the first line segment L1 can be made twice or more, and thus, the pressing load FL can be made 1 / 2 or less of the pulling load FR.

[0136] In this way, by using the "lever principle", the wiper blade 40 can be removed from the wiper arm 30 with a relatively small pressing load FL. Therefore, it is possible to improve the maintainability of the wiper device 10.

[0137] 12, the first and second tip-side inclined surfaces 65a, 66a provided on the blade-side connecting member 60 of the wiper blade 40 are disposed closer to the rear window GS (lower in the figure) than the axis CT. Specifically, in the vertical direction of the rear window GS, the first and second tip-side inclined surfaces 65a, 66a are spaced apart from the axis CT by a distance L4. Note that the distance L4 is shorter than the length of the first line segment L1 (see FIG. 13).

[0138] As a result, during the wiping operation of the wiper blade 40, the rotation angle of the wiper blade 40 relative to the wiper arm 30 can be set to β degrees, which ensures sufficient wiping performance of the wiper blade 40. On the other hand, during maintenance of the wiper device 10, the rotation angle can also be set to γ ​​degrees, which allows the wiper blade 40 to be detached from the wiper arm 30.

[0139] Furthermore, when performing maintenance on the wiper device 10, the user may press the pressing portion PS2 at the longitudinal center of the rubber holder 43 located at the longitudinal tip side of the wiper blade 40 instead of the pressing portion PS1 at the longitudinal center of the rubber holder 43 located at the longitudinal base end side of the wiper blade 40.

[0140] 6, the first and second base end abutment portions 53b, 54b on the longitudinal base end sides (right sides in the figure) of the first and second side wall end portions 53, 54 can abut against the first and second base end inclined surfaces 65b, 66b (see FIG. 8), respectively. This also allows the wiper blade 40 to be removed from the wiper arm 30 with a relatively small pressing load FL (see FIG. 14).

[0141] Here, as shown in Figure 14, the position of the pressing portion PS2 is the "point of force" of the principle of leverage, the position where the first and second base end abutment portions 53b, 54b abut against the first and second base end inclined surfaces 65b, 66b is the "fulcrum (symbol P2 in the figure)" of the principle of leverage, and the position where the connecting shaft portion 52 and the pair of retaining claws 71 are connected (position of the axis center CT) is the "point of action" of the principle of leverage.

[0142] As shown in FIG. 14, in the longitudinal direction of the wiper blade 40, the length of the first line segment L1' connecting the position of the axial center CT (point of action) and the position (fulcrum at the longitudinal center position of the position where the first and second proximal-side abutting portions 53b, 54b and the first and second proximal-side inclined surfaces 65b, 66b are abutted in line contact) is shorter than the length of the second line segment L2' connecting the position of the pressing portion PS2 (point of force) and the position (fulcrum at the longitudinal center position of the position where the first and second proximal-side abutting portions 53b, 54b and the first and second proximal-side inclined surfaces 65b, 66b are abutted in line contact) (L1' < L2'). Thereby, the principle of a lever is realized such that the pressing load FL < the pulling load FR.

[0143] Furthermore, the length of the third line segment L3' connecting the position of the axial center CT (point of action) and the position of the connecting member tip portion 68 on the side opposite to the first and second proximal-side inclined surfaces 65b, 66b in the longitudinal direction of the blade-side connecting member 60 is equal to or longer than the length of the first line segment L1' (L1' ≤ L3'). Since it is assumed that the user holds the rubber holder 43 during maintenance of the wiper device 10, in most cases, the pressing portion PS2 is arranged on the longitudinal tip side of the blade-side connecting member 60. Therefore, by setting L1' ≤ L3', the difference between the length of the second line segment L2' and the length of the first line segment L1' can be made two times or more, and thus the pressing load FL can be made one-half or less of the pulling load FR.

[0144] The connecting member tip portion 68 corresponds to the connecting member end portion in the present invention.

[0145] Thus, even when pressing the pressing portion PS2, by using the "lever principle", the wiper blade 40 can be removed from the wiper arm 30 with a relatively small pressing load FL. Therefore, it is possible to improve the maintainability of the wiper device 10.

[0146] The wiper blade 40 can be removed from the wiper arm 30 by pressing either the pressing portion PS1 or the pressing portion PS2, so that the user can select either the pressing portion PS1 or the pressing portion PS2 according to their preference (such as dominant hand).

[0147] In addition, as shown in Figure 7, the blade side connecting member 60 is symmetrical in the longitudinal direction around the pair of holding claws 71, thereby improving the manufacturability of the blade side connecting member 60 and improving assembly by eliminating the orientation of the parts.

[0148] Furthermore, regardless of whether the wiper blade 40 is of the lockback type, it is possible to easily remove the wiper blade 40 from the wiper arm 30. Specifically, if the wiper arm is not of the lockback type, the angle at which the wiper arm can stand is small, making it difficult to remove the wiper blade 40 from the wiper arm 30 using the pressing portion PS1. In this case, the tip end of the wiper blade 40 in the longitudinal direction is easy to grip, so the wiper blade 40 can be removed from the wiper arm 30 using the pressing portion PS2.

[0149] As described above in detail, according to this embodiment, the first and second block-side outward way walls WL1, WL3 and the first and second block-side return way walls WL2, WL4 are respectively arranged on both sides of the pair of retaining claws 71 in the longitudinal direction of the wiper blade 40, and the first and second block-side outward way walls WL1, WL3 and the first and second block-side return way walls WL2, WL4 are respectively arranged on the rear windshield GS side wiped by the wiper blade 40 and include the first outward way side inclined walls 75a, 79a and the first return way side inclined walls 76a, 80a which are arranged on the rear windshield GS side and face the rear windshield GS side, and the second outward way side inclined walls 75b, 79b and the second return way side inclined walls 76b, 80b which are arranged on the opposite side from the rear windshield GS side and face the opposite side from the rear windshield GS side, can be tilted in the wiping direction of the wiper blade 40 relative to the wiper arm 30, and when the wiper blade 40 is tilted in one direction relative to the wiper arm 30, the second outward inclined walls 75b, 79b of the first and second block-side outward walls WL1, WL3 abut against the first connecting wall portion 51a, and the first return-side inclined walls 76a, 80a of the first and second block-side return-side walls WL2, WL4 abut against the second connecting wall portion 51b, and when the wiper blade 40 is tilted in the other direction relative to the wiper arm 30, the first outward inclined walls 75a, 79a of the first and second block-side outward walls WL1, WL3 abut against the first connecting wall portion 51a, and the second return-side inclined walls 76b, 80b of the first and second block-side return-side walls WL2, WL4 abut against the second connecting wall portion 51b.

[0150] This allows the wiper blade 40 to tilt counterclockwise and clockwise around the tilt center SA relative to the wiper arm 30. Therefore, during forward wiping and backward wiping operations, the first and second corners CN1 and CN2 of the tip of the lip portion 41b can be brought into sliding contact with the rear windshield GS at an appropriate contact angle. This makes it possible to thoroughly wipe away rainwater, dust, and the like adhering to the rear windshield GS while suppressing chatter in the blade rubber 41.

[0151] Furthermore, even when the wiper blade 40 and the wiper arm 30 rotate clockwise and counterclockwise relative to each other about the axis CT (see FIG. 12), the inclination direction of each inclined wall (75a, 75b, 76a, 76b, 79a, 79b, 80a, 80b) with respect to the longitudinal direction of the wiper blade 40 does not change. Therefore, the inclination angle of the wiper blade 40 with respect to the wiper arm 30 can be more appropriately regulated during the wiping operation of the wiper blade 40.

[0152] Furthermore, according to this embodiment, a pair of retaining claws 71 are positioned at a recessed position in the wiping direction of the wiper blade 40 from the first and second block side outward path walls WL1, WL3 and the first and second block side return path walls WL2, WL4.

[0153] This prevents the pair of retaining claws 71 from coming into contact with the parting line PL (see FIG. 6) that occurs on the surfaces of the first and second connecting wall portions 51a, 51b during injection molding of the wiper arm 30. This makes it possible to incline the wiper blade 40 at a predetermined angle relative to the wiper arm 30, thereby improving the wiping performance of the wiper device 10.

[0154] Furthermore, according to this embodiment, the ends 75d, 76d, 79d, 80d on the rear window GS side of the first and second block side outward path walls WL1, WL3 and the first and second block side return path walls WL2, WL4 and the ends 75e, 76e, 79e, 80e on the opposite side from the rear window GS side each extend parallel to the longitudinal direction of the wiper blade 40.

[0155] This makes it possible to ensure a sufficient area for each of the inclined walls (75a, 75b, 76a, 76b, 79a, 79b, 80a, 80b), and to appropriately regulate the inclination angle of the wiper blade 40 relative to the wiper arm 30.

[0156] Furthermore, according to this embodiment, the first outward apex 75c is disposed between the first outward sloping wall 75a and the second outward sloping wall 75b, the second outward apex 79c is disposed between the first outward sloping wall 79a and the second outward sloping wall 79b, the first homeward apex 76c is disposed between the first homeward sloping wall 76a and the second homeward sloping wall 76b, and the second homeward apex 80c is disposed between the first homeward sloping wall 80a and the second homeward sloping wall 80b. The first outward apex 75c, the first homeward apex 76c, the second outward apex 79c, and the second homeward apex 80c each extend parallel to the longitudinal direction of the wiper blade 40.

[0157] This allows the wiper blade 40 to be tilted with precision at a predetermined reversal timing on both sides of the wiping direction (forward and backward directions) of the wiper blade 40 relative to the wiper arm 30. This further improves the wiping performance of the wiper device 10.

[0158] In addition, according to this embodiment, the wiper blade 40 is provided with a blade side connecting member 60 extending in the longitudinal direction of the wiper blade 40 and having a pair of retaining claws 71, and the blade side connecting member 60 is provided with a vertebra holding portion 61 arranged on the rear window GS side and holding the blade rubber 41 that wipes the rear window GS, and a connecting main body portion 70 arranged on the opposite side of the rear window GS side of the vertebra holding portion 61 and having a pair of retaining claws 71, first and second block side outward path walls WL1 and WL3 and first and second block side return path walls WL2 and WL4, and on both longitudinal sides of the vertebra holding portion 61 are provided a tip portion T1 and a base portion T2 that cover the end of the rubber holder 43 that covers the side of the blade rubber 41 opposite the rear window GS side, and the tip portion T1 and the base portion T2 are arranged at positions in the longitudinal direction of the wiper blade 41 corresponding to the first and second block side outward path walls WL1 and WL3 and the first and second block side return path walls WL2 and WL4.

[0159] This allows the end of the rubber holder 43 to be covered and concealed, creating a sense of unity and ultimately improving the overall appearance of the wiper device 10. Furthermore, the provision of the tip end portion T1 and the base end portion T2 allows the first and second block side outward walls WL1, WL3 and the first and second block side return walls WL2, WL4 to be enlarged accordingly, thereby enabling the wiper blade 40 to be tilted stably relative to the wiper arm 30.

[0160] Furthermore, according to this embodiment, the vertebra holding portion 61 is wider than the connecting main body portion 70 in the wiping direction of the wiper blade 40, and has first and second inclined surfaces 65, 66 that are inclined so as to approach the rear window GS as they move away from the connecting main body portion 70 in the wiping direction of the wiper blade 40.

[0161] This makes it possible to avoid contact between the wiper blade 40 and the wiper arm 30 when the wiper blade 40 tilts in the wiping direction relative to the wiper arm 30 (see Figures 10 and 11), thereby further improving the wiping performance of the wiper device 10.

[0162] In addition, according to this embodiment, first and second tip side inclined surfaces 65a, 66a are provided on the side opposite the rear window GS side of the tip portion T1, against which the first connecting wall portion 51a and the second connecting wall portion 51b of the wiper arm 30 abut when the pair of retaining claws 71 are removed from the connecting shaft portion 52.

[0163] This allows the first and second tip-side inclined surfaces 65a, 66a to be positioned near the connecting shaft 52 and the pair of retaining claws 71, and the connecting shaft 52 and the pair of retaining claws 71, which are connected by a snap fit, can be easily removed by using the "lever principle." This improves the maintainability of the wiper device 10.

[0164] Furthermore, according to this embodiment, the wiper device 10 can be easily manufactured without increasing the number of parts, which makes it possible to reduce the manufacturing energy required to manufacture the wiper device 10, and ultimately to achieve the Sustainable Development Goals (SDGs) established by the United Nations, particularly Goal 7 (Ensure access to affordable, reliable, sustainable and modern energy for all) and Goal 13 (Take urgent action to combat climate change and its impacts).

[0165] The present invention is not limited to the above-described embodiment and may be modified in various ways without departing from the spirit and scope of the present invention. For example, in the above-described embodiment, the arm-side connecting member 50 is provided with the first and second tip-side abutment portions 53a, 54a and the first and second base-side abutment portions 53b, 54b, and the blade-side connecting member 60 is provided with the first and second tip-side inclined surfaces 65a, 66a and the first and second base-side inclined surfaces 65b, 66b. However, the present invention is not limited to this. Only the first and second tip-side abutment portions 53a, 54a or only the first and second tip-side inclined surfaces 65a, 66a may be provided. Alternatively, only the first and second base-side abutment portions 53b, 54b or only the first and second base-side inclined surfaces 65b, 66b may be provided.

[0166] In the above embodiment, the arm-side connecting member 50 of the wiper arm 30 is provided with the connecting shaft portion (connecting shaft) 52 as the first connecting portion, and the blade-side connecting member 60 of the wiper blade 40 is provided with the pair of retaining claws 71 as the second connecting portion, but the present invention is not limited to this, and the arm-side connecting member 50 of the wiper arm 30 may be provided with the pair of retaining claws as the first connecting portion, and the blade-side connecting member 60 of the wiper blade 40 may be provided with a connecting shaft as the second connecting portion. In other words, the connecting shapes of the connecting portions may be reversed.

[0167] Furthermore, in the above embodiment, the vertebra holding portion 61 is provided with the first and second tip-side inclined surfaces 65a, 66a and the first and second base-side inclined surfaces 65b, 66b, while the first and second tip-side abutment portions 53a, 54a and the first and second base-side abutment portions 53b, 54b are provided parallel to the longitudinal direction of the wiper arm 30. However, the present invention is not limited to this, and the first and second tip-side abutment portions 53a, 54a and the first and second base-side abutment portions 53b, 54b may be inclined, and the first and second tip-side inclined surfaces 65a, 66a and the first and second base-side inclined surfaces 65b, 66b may be surfaces that expand parallel to the longitudinal direction of the wiper blade 40. In other words, the inclination relationship of the abutment portions that abut against each other may be reversed.

[0168] However, the contact areas between the first and second connecting wall portions 51a, 51b of the arm-side connecting member 50 and the connecting body portion 70 of the blade-side connecting member 60 are portions that support the tilting of the wiper blade 40 relative to the wiper arm 30. Therefore, in order to increase the mutual support rigidity, it is desirable to make the contact area between them as large as possible, with the tilt relationship as in the above embodiment.

[0169] In addition, in the above embodiment, the wiper arm 30 is applied to a wiper device 10 that wipes the windshield (rear glass) provided on the back door of a vehicle such as an automobile, but the present invention is not limited to this and can also be applied to wiper devices that wipe the windshield of a vehicle such as an automobile, or the glass of an aircraft, railway vehicle, construction machinery, etc.

[0170] In addition, the material, shape, dimensions, number, installation location, etc. of each component in the above embodiments are arbitrary as long as they can achieve the present invention, and are not limited to the above embodiments. [Explanation of symbols]

[0171] 10: wiper device, 20: arm head portion, 21: cover member, 30: wiper arm, 31: top wall portion, 32a: outward path side wall portion, 32b: return path side wall portion, 33: arm connecting portion, 34: arm tip portion, 35: spring hook portion, 36: reinforcing rib, 40: wiper blade, 41: blade rubber, 41a: blade body, 41b: lip portion, 41c: neck portion, 41d: groove portion, 42: vertebra, 42a: engagement groove, 43: rubber holder, 43a: rubber holder side retaining claw, 44: end cap, 50: arm side connecting member, 51a: first connecting wall portion (first side wall portion) , 51b: Second connecting wall part (second side wall part), 52: Connecting shaft part (first connecting part, connecting shaft), 53: First side wall end part, 53a: First tip side abutting part, 53b: First base side abutting part, 54: Second side wall end part, 54a: Second tip side abutting part, 54b: Second base side abutting part, 60: Blade side connecting member ( Connecting member), 61: Vertibra holding part (blade holding part), 62a: First bulging part, 62b: Second bulging part, 63a: First connecting member side holding claw, 63b: Second connecting member side holding claw, 64: Engagement convex part, 65: First inclined surface (inclined surface), 65a: First tip side inclined surface (butting part), 65b: Second Base end side inclined surface (abutment portion), 66: second inclined surface (inclined surface), 66a: second tip side inclined surface (abutment portion), 66b: second base end side inclined surface (abutment portion), 67: base end portion of connecting member, 68: tip portion of connecting member, 70: connecting main body portion (adapter portion), 71: retaining claw (second connecting portion), 72: recessed groove, 73: first block portion, 74: first gap, 75a: first outward path side inclined wall (first inclined surface), 75b: second outward path side inclined wall (second inclined surface), 75c: first outward path side apex portion (apex portion), 75d: end portion on the rear window side, 75e: end portion opposite the rear window side, 76a: first homeward path side inclined wall (first inclined wall) ,76b: second return-way inclined wall (second inclined wall), 76c: first return-way apex (apex), 76d: end on the rear window side, 76e: end on the opposite side from the rear window side, 77: second block portion, 78: second gap, 79a: first return-way inclined wall (first inclined surface), 79b: second return-way inclined wall (second inclined surface), 79c: second return-way apex (apex), 79d: end on the rear window side, 79e: end on the opposite side from the rear window side, 80a: first return-way inclined wall (first inclined surface), 80b: second return-way inclined wall (second inclined surface), 80c: second return-way apex (apex), 80d: end on the rear window side,80e: End opposite to the rear window side, CL: Gap, CN1: First corner, CN2: Second corner, CT: Shaft center, FL: Pressing load, G1: Outward gap, G2: Return gap, GS: Rear window (wiping surface), L1, L1': First line segment, L2, L2': Second line segment, L3, L3': Third line segment, L4: Distance, LD: Lifting load, PL: Parting line, PS1, P S2: pressing part, SA: tilting center, T1: tip part (holder covering part), T2: base part (holder covering part), WL1: first block side outward path wall (first opposing wall part), WL2: first block side return path wall (second opposing wall part), WL3: second block side outward path wall (first opposing wall part), WL4: second block side return path wall (second opposing wall part), α degrees: tilt angle, β degrees: rotation angle, γ degrees: rotation angle,

Claims

1. A wiper device comprising: a wiper arm having a first connecting portion; and a wiper blade having a second connecting portion connected to the first connecting portion and configured to wipe a surface to be wiped, wherein the first connecting portion and the second connecting portion are connected to each other so as to be rotatable about an axis extending in a wiping direction of the wiper blade, the wiper arm includes a first side wall portion and a second side wall portion that are disposed opposite each other in a wiping direction of the wiper blade and support the first connecting portion in the wiping direction of the wiper blade, the wiper blade is fitted inside the first side wall portion and the second side wall portion, and has a first opposing wall portion facing the first side wall portion and a second opposing wall portion facing the second side wall portion, The first opposing wall portion and the second opposing wall portion are disposed on both sides of the second connecting portion in the longitudinal direction of the wiper blade, respectively, and The first opposing wall portion and the second opposing wall portion are a first inclined surface disposed on the wiping surface side and facing the wiping surface side; a second inclined surface disposed on the opposite side to the wiping surface and facing the opposite side to the wiping surface; Each of them has the wiper blade is tiltable relative to the wiper arm in a wiping direction of the wiper blade, When the wiper blade is inclined in one direction with respect to the wiper arm, the second inclined surface of the first opposing wall portion abuts against the first side wall portion, and the first inclined surface of the second opposing wall portion abuts against the second side wall portion, When the wiper blade is inclined in another direction with respect to the wiper arm, the first inclined surface of the first opposing wall portion abuts against the first side wall portion, and the second inclined surface of the second opposing wall portion abuts against the second side wall portion. Wiper device.

2. The wiper device according to claim 1, the first connecting portion is a connecting shaft extending in a wiping direction of the wiper blade, the second connecting portion is a pair of flexible retaining claws disposed opposite to each other in the longitudinal direction of the wiper blade and into which the connecting shaft is inserted; the pair of retaining claws are disposed at positions recessed from the first opposing wall portion and the second opposing wall portion in the wiping direction of the wiper blade; Wiper device.

3. The wiper device according to claim 1, an end portion of each of the first and second opposing walls on the wiping surface side and an end portion of each of the first and second opposing walls on the opposite side to the wiping surface side extend parallel to a longitudinal direction of the wiper blade; Wiper device.

4. The wiper device according to claim 1, a peak portion that protrudes most in the wiping direction of the wiper blade is disposed between the first inclined surface and the second inclined surface, and the peak portion extends parallel to the longitudinal direction of the wiper blade; Wiper device.

5. The wiper device according to claim 1, the wiper blade includes a connecting member extending in a longitudinal direction of the wiper blade and having the second connecting portion; The connecting member is a blade holding portion that is disposed on the wiping surface side and that holds a blade rubber that wipes the wiping surface; an adapter portion disposed on the opposite side of the blade holding portion from the wiping surface side, the adapter portion having the second connecting portion, the first opposing wall portion, and the second opposing wall portion; Equipped with a holder covering portion for covering an end of a rubber holder that covers the side of the blade rubber opposite to the wiping surface side, on both longitudinal sides of the blade holding portion; the holder covering portion is disposed at a position corresponding to the first opposing wall portion and the second opposing wall portion in the longitudinal direction of the wiper blade; Wiper device.

6. The wiper device according to claim 5, The blade holding portion is wider than the adapter portion in the wiping direction of the wiper blade, and has an inclined surface that is inclined so as to approach the wiping surface as it moves away from the adapter portion in the wiping direction of the wiper blade. Wiper device.

7. The wiper device according to claim 5, abutting portion against which the first side wall portion and the second side wall portion of the wiper arm abut when the second connecting portion is detached from the first connecting portion is provided on the opposite side of the holder covering portion from the wiping surface side; Wiper device.

Images