Wiper blade

Abstract

A wiper blade (10) includes a blade body (15) having a first locking portion (46) and a second locking portion (48), a blade rubber (12), and a yoke member (20). The yoke member (20) is formed of a metal plate and includes a first extension (62) having a locking protrusion (68) for locking the first locking portion (46) and a blade rubber locking portion (84) extending from the first extension (62) for locking the blade rubber (12). Further, the yoke member (20) has a second extension (64) extending from an end of the first extension (62) opposite the locking protrusion (68) toward a side opposite the blade rubber (12) and a third extension (66) having a locking hole (76) for locking the second locking portion (48) and extending from an end of the second extension (64) opposite the first extension (62) toward the blade rubber (12). The second extension (64) is bent at a boundary with the third extension (66), and the second extension (64) is continuous with the third extension (66).

Description

[0001] Citation of relevant applications

[0002] This application is based on Japanese Patent Application No. 2021-110781, filed on July 2, 2021, the contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to a wiper blade. Background Technology

[0004] Patent Document 1 discloses a windshield wiper for wiping away water droplets and other debris adhering to the windshield of a vehicle. The wiper described in this document includes a wiper blade rubber and a wiper arm assembly that supports the wiper blade rubber. The wiper arm assembly consists of a main rod connected to the wiper arm, a pair of movable covers located on both sides of the main rod along its length, and a pair of yoke members (yoke rods) movably connected to the main rod and the pair of movable covers. In this wiper arm assembly, the wiper blade rubber is supported by the pair of movable covers and the pair of yoke members.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2020-45034 Summary of the Invention

[0008] In the wiper blade described in Patent Document 1, the yoke member consists of a metal part and a resin yoke member main body located outside the metal part. The metal part is embedded into the yoke member main body by insert molding. In this structure, the structure of the yoke member becomes complex and the process cost of insert molding increases.

[0009] The purpose of this disclosure is to provide a wiper blade that can prevent the structure of the yoke member from becoming too complex.

[0010] In a first aspect of this disclosure, the wiper blade includes: a wiper body having a first locking portion and a second locking portion, which moves together with the wiper arm toward one side and the other side in a wiping direction; a wiper rubber, which wipes the wiping surface by moving the wiper body to one side and the other side; and a yoke member, which is made of a metal plate and disposed between the wiper body and the wiper rubber, the yoke member having: a first extension having a first wiper body locking portion for locking by the first locking portion and extending along the length direction of the wiper rubber; and a wiper rubber locking portion. The scraper rubber is secured by a first extension; a second extension extends from the end of the first extension opposite to the first scraper body securing portion toward the side opposite to the scraper rubber; and a third extension has a second scraper body securing portion for the second securing portion to be secured and extends from the end of the second extension opposite to the first extension toward the side of the scraper rubber, wherein the junction of the second extension and the third extension is folded back and the second extension coincides with the third extension.

[0011] This configuration helps to prevent the structure of the yoke from becoming too complex. Attached Figure Description

[0012] The above-mentioned objects, other objects, features, and advantages of this disclosure will become clearer with reference to the accompanying drawings and the following detailed description. The accompanying drawings are described below.

[0013] Figure 1 This is a perspective view showing the wiper blade according to this embodiment.

[0014] Figure 2 This is a perspective view of the wiper blade according to this embodiment, with the illustration of the pair of left and right flaps omitted.

[0015] Figure 3 This is a perspective view of the wiper blade according to this embodiment, with the stalk and the pair of left and right flaps omitted.

[0016] Figure 4 This is a side view showing the wiper blade of this embodiment disassembled.

[0017] Figure 5 This is a perspective view showing the wiper blade of this embodiment disassembled.

[0018] Figure 6 Indicates along Figure 1 The cross-sectional view of the wiper blade after being cut along line 6-6 is shown.

[0019] Figure 7 This is a side view representing the yoke component.

[0020] Figure 8 is a side view of the yoke member observed from the opposite side of Figure 6 the yoke member.

[0021] Figure 9 is an enlarged side view showing the locking ridges of the yoke member.

[0022] Figure 10 is a view showing the windshield wiper observed from the direction of arrow 3 shown in Figure 3 the windshield wiper.

[0023] Figure 11 is a view schematically showing the yoke member tilting to one side from the neutral position.

[0024] Figure 12 is a view schematically showing the yoke member tilting to the other side from the neutral position. Detailed Embodiment

[0025] Using Figures 1-10 the windshield wiper 10 of the embodiment of the present disclosure will be described.

[0026] As Figures 1-5 shown, the windshield wiper 10 of the present embodiment is used to wipe water droplets and the like adhering to the outer surface of the windshield of the vehicle, that is, the wiping surface. In addition, the windshield wiper 10 of the present embodiment is a windshield wiper that applies a structure called a tournament structure (Japanese: トーナメント構造).

[0027] The windshield wiper 10 is configured to be connected to the front end portion of a windshield wiper arm not shown and to receive a pressing force from the windshield wiper arm toward the wiping surface side of the windshield. In addition, the windshield wiper arm, the windshield wiper 10, and the windshield wiper motor together constitute a vehicle windshield wiper device. And, by tilting (displacing) the windshield wiper arm to one side and the other side, the windshield wiper 10 reciprocally moves (displaces) along the wiping surface of the windshield to one side and the other side in the wiping direction. In addition, the arrow UP shown in the figure indicates the upper side in the vertical direction of the windshield wiper 10. The upper side of the windshield wiper 10 is a direction substantially orthogonal to the wiping surface of the windshield. Further, the arrow L shown in the figure indicates one side in the longitudinal direction of the windshield wiper 10. In addition, the arrow FR shown in the figure indicates one side in the direction in which the windshield wiper 10 reciprocally moves. One side in the direction in which the windshield wiper 10 reciprocally moves faces the front side and the obliquely lower side of the vehicle when the vehicle windshield wiper device is in a stopped state. In the following description, the vertical direction of the windshield wiper 10 and the longitudinal direction of the windshield wiper 10 will be simply referred to as the vertical direction and the longitudinal direction, respectively. Further, one side and the other side in the direction in which the windshield wiper 10 reciprocally moves will be simply referred to as the front side and the rear side, respectively.

[0028] As Figure 4 and Figure 5As shown, the wiper blade 10 consists of a wiper rubber 12 for wiping the surface of the windshield and a wiper arm assembly 14 for supporting the wiper rubber 12.

[0029] The wiper arm assembly 14 consists of a rod 16 connected to the front end of the wiper arm at its central length, a pair of vanes 18 located on both sides of the rod 16 along its length, and a pair of yoke members 20 connecting the rod 16 to the vanes 18. The wiper arm assembly 14 is configured to support the wiper blade rubber 12 via the vanes 18 and the yoke members 20.

[0030] (Structure of scraper rubber 12)

[0031] The wiper rubber 12 is formed into a strip shape, for example, from rubber. The wiper rubber 12 has a base 22 supported by the wiper arm assembly 14 and a wiping portion 24 extending downward from the base 22 and pressing its lower end against the wiping surface of the windshield. A pair of backing grooves 26, opening on both sides in the rear-forward direction, are formed along the length of the wiper rubber 12. These backing grooves 26 are configured to accommodate backings (not shown) made of a metal leaf spring material. These backings disperse the pressure exerted on the wiping surface from the wiper arm along the length of the wiper rubber 12. Furthermore, in the base 22 of the wiper rubber 12, a pair of support grooves 28, opening on both sides in the rear-forward direction, are formed along the length of the wiper rubber 12 at a position lower than the pair of backing grooves 26.

[0032] (Structure of wiper arm assembly 14)

[0033] As described above, the wiper arm assembly 14 consists of a rod 16, a pair of flaps 18, and a pair of yoke members 20. Furthermore, the wiper arm assembly 14 is formed in a shape symmetrical along its length, centered on the portion connected to the wiper blade.

[0034] (Structure of rod 16)

[0035] As an example, the rod 16 is formed of resin material and is elongated in the longitudinal direction. The rod 16 constitutes the middle part of the wiper arm assembly 14 in the longitudinal direction. The middle part of the rod 16 in the longitudinal direction is provided as a connecting part 30, and a pair of arms 32 are provided on both sides of the connecting part 30 in the longitudinal direction.

[0036] like Figure 5 As shown, the connecting portion 30 is formed into a rectangular frame shape when viewed from above. A connecting shaft (not shown) is provided inside this connecting portion. The front end of the wiper arm is connected to this connecting shaft via a connecting clamp 34.

[0037] A pair of arms 32 extend from the connecting portion 30 along one side and the other side in the longitudinal direction, respectively. For example... Figure 5 as well as Figure 6As shown, these arms 32 have a downward-opening cross-sectional shape when viewed from the length direction of the rod 16.

[0038] like Figure 6 As shown, the arm portion 32 includes an upper wall 36, a front wall 38 extending downward from the front end of the upper wall 36, and a rear wall 40 extending downward from the rear end of the upper wall 36. Furthermore, a yoke member placement groove 42, open at the lower side, is formed along its length between the front wall 38 and the rear wall 40 of the arm portion 32. Here, an intermediate wall 44 protruding downward is provided between the front portion 42F and the rear portion 42R of the yoke member placement groove 42. Additionally, in this embodiment, the depth of the yoke member placement groove 42 from the open end to the rear portion 42R is greater than the depth from the open end to the front portion 42F.

[0039] Furthermore, the arm portion 32 includes a generally cylindrical first locking portion 46, which protrudes from the front wall 38 toward the inner and rear sides of the yoke member mounting groove 42. Additionally, the arm portion 32 includes a generally cylindrical second locking portion 48, which protrudes from the rear wall 40 toward the inner and front sides of the yoke member mounting groove 42. The first locking portions 46 and the second locking portions 48 are positioned opposite each other in the front-rear direction. Here, in this embodiment, one arm portion 32 is provided with two first locking portions 46 and two second locking portions 48. The two first locking portions 46 and two second locking portions 48 of one arm portion 32 are spaced apart in the length direction. Similarly, the other arm portion 32 is provided with two first locking portions 46 and two second locking portions 48. The two first locking portions 46 and two second locking portions 48 of the other arm portion 32 are spaced apart in the length direction.

[0040] In addition, the upper surface of the arm 32 is an inclined surface 32A that slopes upward as it moves backward.

[0041] (Structure of wing plate 18)

[0042] like Figure 4 as well as Figure 5 As shown, as an example, a pair of wing plates 18 are formed into elongated strips from resin material. These wing plates 18 are respectively disposed on one side and the other side of the length direction of the rod 16. Each wing plate 18 has a downward-opening cross-sectional shape.

[0043] like Figure 5As shown, each wing plate 18 includes an upper wall 50, a front wall 52 extending downward from the front end of the upper wall 50, and a rear wall 54 extending downward from the rear end of the upper wall 50. Furthermore, a yoke member placement groove 56, open at the lower side, is formed along the length direction between the front wall 52 and the rear wall 54 of each wing plate 18. Here, an intermediate wall 58 protruding downward is provided between the front portion 56F and the rear portion 56R of the yoke member placement groove 56. Additionally, in this embodiment, the depth of the yoke member placement groove 56 from the open end to the rear portion 56R is greater than the depth from the open end to the front portion 56F. Thus, the portion of each wing plate 18 on the rod 16 side is configured to be the same as the arm portion 32 of the rod 16. Furthermore, a first locking portion 46 and a second locking portion 48 (see reference) are respectively provided at the middle portion along the length direction of each wing plate 18, corresponding to the arm portion 32 of the rod 16. Figure 6 The first locking part and the second locking part are respectively provided. In this embodiment, one wing plate 18 is provided with a first locking part and a second locking part. In addition, the other wing plate 18 is provided with a first locking part and a second locking part.

[0044] Furthermore, the upper surface of each wing 18 and the upper surface of the arm 32 are similarly inclined surfaces 18A that slope upwards towards the rear. Moreover, each wing 18 and the aforementioned rod 16 constitute the wiper body 15 on the outer surface side of the wiper blade 10.

[0045] Furthermore, a scraper rubber locking portion 60 is formed at the end of each wing plate 18 opposite to the rod 16, which locks and supports the longitudinal end of the scraper rubber 12. The scraper rubber locking portion 60 has a pair of front and rear support pieces 60A extending downward from the front wall 52 and the rear wall 54. The front ends (lower ends) of the front and rear support pieces 60A are bent toward each other and fit into the pair of support grooves 28. Thus, the longitudinal end of the scraper rubber 12 is supported by the scraper rubber locking portion 60.

[0046] (Regarding the yoke component 20)

[0047] like Figure 7 as well as Figure 8 As shown, a pair of yoke members 20 are formed into elongated strips along their length. Each yoke member 20 is formed by bending or bending metal plates cut to a predetermined shape. Furthermore, the structure of one yoke member 20 is substantially the same as that of the other yoke member 20.

[0048] like Figures 4-6 As shown, the yoke member 20 is disposed between the rod 16 constituting the scraper body 15 and the wing plate 18 and scraper rubber 12. Figure 6 as well as Figure 7As shown, the yoke member 20 includes a first extension 62 extending along the upper surface of the base 22 of the scraper rubber 12 and a second extension 64 extending from the rear end of the first extension 62 toward the side opposite to the scraper rubber 12, i.e., the upper side. Furthermore, the yoke member 20 includes a third extension 66, which folds back from the upper end of the second extension 64 and extends toward the scraper rubber 12 side, i.e., the lower side.

[0049] The first extension 62 is formed in a rectangular shape, with its thickness direction being vertical and horizontal, and extending in the front-back and length directions. For example... Figure 6 , Figure 7 as well as Figure 9 As shown, a locking protrusion 68 is formed at the front end of the first extension 62, serving as a first scraper body locking portion protruding in the thickness direction of the first extension 62 and on the side opposite to the scraper rubber 12 (the upper side). In this embodiment, three locking protrusions 68 are formed at the front end of the first extension 62, and the three locking protrusions 68 are arranged at intervals along the length direction. Furthermore, the lower surface of the locking protrusion 68 is curved into a generally U-shaped surface that is open at the lower side when viewed from the front side.

[0050] like Figure 6 as well as Figure 7 As shown, the second extension 64 is formed into a rectangle whose thickness direction is in the rear-rear direction and which extends in the vertical and length directions. Figure 7 As shown, the dimension of the second extension 64 in the upward and downward direction gradually decreases from the central portion in the length direction to the end side in the length direction.

[0051] like Figure 6 as well as Figure 8 As shown, the third extension 66 is formed into a rectangle whose thickness direction is in the rear-rear direction and which extends in the vertical and length directions. Here, as... Figure 6 As shown, the junction of the second extension 64 and the third extension 66 is a U-shaped fold-back portion 70 that folds downwards. Thus, the upper portions of the second extension 64 and the third extension 66 overlap in their thickness direction. Here, the portion of the third extension 66 that overlaps with the second extension 64 is referred to as the overlapping portion 72. Furthermore, the lower portion of the third extension 66 extends downwards relative to the lower surface of the first extension 62. Here, the portion of the third extension 66 that extends downwards relative to the lower surface of the first extension 62 is referred to as the protruding end 74. The lower end of this protruding end 74 is positioned opposite the upper end of the base 22 of the scraper rubber 12 in the front-rear direction. Thus, the air passing between the rod 16 constituting the scraper body 15 and the blade 18 and the scraper rubber 12 collides with the protruding end 74 of the third extension 66.

[0052] Furthermore, a locking hole 76 is formed at the middle portion of the third extension 66 in the vertical direction, serving as a locking portion for the second scraper body that extends through the thickness direction of the third extension 66. In this embodiment, three locking holes 76 are formed in the third extension 66, and the three locking holes 76 are arranged at intervals along the length direction. Additionally, the positions of the three locking holes 76 in the length direction and the vertical direction are approximately the same as the positions of the three locking protrusions 68 described above. Furthermore, as... Figure 8 As shown, the edge of the locking hole 76 is rectangular when viewed from the rear. Furthermore, the upper edge of the locking hole 76 curves into a roughly U-shape, opening to the lower side. Here, as... Figure 6 As shown, in this embodiment, the locking hole 76 extends from the portion below the overlapping portion 72 of the third extension 66 to the portion above the protruding end 74. Thus, the lower portion of the locking hole 76 is positioned relative to the first extension 62 on the scraper rubber 12 side (lower side). Furthermore, as... Figure 8 As shown, in this embodiment, at the lower end of the protruding end 74 of the third extension 66, there is a recessed portion 78 between a pair of adjacent locking holes 76 in the longitudinal direction. In this embodiment, the recessed portion 78 is formed at two locations at the lower end of the protruding end 74.

[0053] like Figure 2 , Figure 5 as well as Figure 6 As shown, two first locking portions 46 formed on one side of the length direction of the rod 16 are respectively locked to the central portion of the yoke member 20 in the length direction and two locking protrusions 68 formed on the other side of the length direction. Furthermore, two second locking portions 48 formed on one side of the length direction of the rod 16 are respectively locked to the central portion of the yoke member 20 in the length direction and two locking holes 76 formed on the other side of the length direction. Although not shown in the figure, a first locking portion formed on the wing plate 18 disposed on one side of the length direction relative to the rod 16 is locked to the locking protrusions 68 formed on one side of the length direction of the yoke member 20. Furthermore, a second locking portion formed on the wing plate 18 disposed on one side of the length direction relative to the rod 16 is locked to the locking holes 76 formed on one side of the length direction of the yoke member 20. Thus, the rod 16 and the wing plate 18 disposed on one side of the length direction relative to the rod 16 are mounted on the yoke member 20. As a result, the rod 16 and the wing plate 18 disposed on one side of the rod 16 in the longitudinal direction are connected in the longitudinal direction via a yoke member 20.

[0054] Similarly, two first locking portions 46 formed on the arm portion 32 on the other side of the length direction of the rod 16 are respectively locked to the central portion of the yoke member 20 on the other side of the length direction and two locking protrusions 68 on one side of the length direction. Furthermore, two second locking portions 48 formed on the arm portion 32 on the other side of the length direction of the rod 16 are respectively locked to the central portion of the yoke member 20 on the other side of the length direction and two locking holes 76 on one side of the length direction. Although not shown in the figure, a first locking portion formed on the wing plate 18, which is disposed on the other side of the length direction relative to the rod 16, is locked to the locking protrusions 68 formed on the other side of the length direction of the yoke member 20. Furthermore, a second locking portion formed on the wing plate 18, which is disposed on the other side of the length direction relative to the rod 16, is locked to the locking holes 76 formed on the other side of the length direction of the yoke member 20. Thus, the rod 16 and the wing plate 18 disposed on the other side of the length direction relative to the rod 16 are mounted on the yoke member 20. As a result, the rod 16 and the wing plate 18, which is disposed on the other side of the rod 16 in the longitudinal direction, are connected in the longitudinal direction via the yoke member 20 on the other side.

[0055] like Figure 6 As shown, with the rod 16 mounted on the yoke member 20, the first extension 62 of the yoke member 20 is disposed in the front portion 42F of the yoke member placement groove 42 formed in the arm portion 32 of the rod 16. Furthermore, the overlapping portion 72 of the second extension 64 and the third extension 66 of the yoke member 20 is disposed in the rear portion 42R of the yoke member placement groove 42 formed in the arm portion 32 of the rod 16. Although not shown in the figure, with the wing plate 18 mounted on the yoke member 20, the first extension 62 of the yoke member 20 is disposed in the front portion 56F of the yoke member placement groove 56 formed in the wing plate 18. Furthermore, the overlapping portion 72 of the second extension 64 and the third extension 66 of the yoke member 20 is disposed in the rear portion 56R of the yoke member placement groove 56 formed in the wing plate 18.

[0056] Here, a predetermined gap is provided between the yoke member 20 and the inner circumferential surface of the yoke member placement groove 42. Therefore, the yoke member 20 can tilt within a predetermined range with its length direction as the axial direction. Furthermore, Figure 6 The state shown is the state where the wiper 10 is stopped. The posture of the yoke member 20 relative to the rod 16 in this state is called the neutral posture.

[0057] In detail, when the wiper blade 10 moves to the rearward side and the wiping part 24 of the wiper blade rubber 12 wipes the wiping surface of the windshield, the yoke member 20 tilts to one side from a neutral position with the contact point between the front end side 80 at the upper end of the locking protrusion 68 of the yoke member 20 and the inner peripheral surface of the yoke member placement groove 42 as the center of rotation.

[0058] Furthermore, when the wiper blade 10 moves forward and the wiping portion 24 of the wiper blade rubber 12 wipes the wiping surface of the windshield, the yoke member 20 tilts from a neutral position to the other side with the contact point between the rear end side 82 at the upper end of the locking protrusion 68 of the yoke member 20 and the inner peripheral surface of the yoke member placement groove 42 as the center of rotation.

[0059] In addition, the gap between the yoke member 20 and the yoke member arrangement slot 56 of the wing plate 18 is the same as the gap between the inner circumferential surface of the yoke member 20 and the yoke member arrangement slot 42 of the rod 16.

[0060] like Figure 3 , Figure 5 as well as Figure 10 As shown, scraper rubber locking portions 84 are formed at both ends of the yoke member 20 along its length to support the middle portion of the scraper rubber 12 along its length. Each scraper rubber locking portion 84 has a pair of front and rear support pieces 84A extending downward from the front and rear ends of the yoke member 20. The front ends (lower ends) of the front and rear support pieces 84A are bent toward each other and fit into the pair of support grooves 28. Thus, the middle portion of the scraper rubber 12 along its length is supported by each scraper rubber locking portion 84.

[0061] (The function and effects of this implementation method)

[0062] Next, the function and effects of this embodiment will be explained.

[0063] like Figure 5 as well as Figure 6 As shown, in the wiper blade 10 of this embodiment, the yoke member 20, which mounts the rod 16 constituting the wiper body 15 and the wing plate 18 and supports the wiper rubber 12, is formed using a metal plate. This yoke member 20, in addition to having a first extension 62, a second extension 64, and a third extension 66, is configured such that the junction of the second extension 64 and the third extension 66 is folded back, and the second extension 64 and the third extension 66 overlap. Therefore, while ensuring the rigidity of the yoke member 20, it is possible to prevent the structure of the yoke member 20 from becoming complex. Furthermore, by adjusting the position of the folded-back portion 70, the shape and size of the yoke member 20 can be made to correspond to rods 16 and wing plates 18 of various shapes and sizes.

[0064] In addition, such as Figure 6 , Figure 7 as well as Figure 9As shown, in the wiper blade 10 of this embodiment, the portion of the first locking portion 46 that locks the rod 16 and the like in the yoke member 20 is a locking protrusion 68 formed in the first extension 62. This suppresses the reduction in bending stiffness of the first extension 62 in the upward and downward directions, and consequently, suppresses the reduction in bending stiffness of the yoke member 20 in the upward and downward directions.

[0065] In addition, such as Figure 6 as well as Figure 8 As shown, in the wiper blade 10 of this embodiment, the portion where the second locking portion 48 of the feed rod 16 and the like is locked in the yoke member 20 is a locking hole 76 formed in the third extension 66. Therefore, for example, the locking hole 76 can be easily formed during the process of cutting the metal plate forming the yoke member 20. Furthermore, the locking hole 76 is configured to penetrate the third extension 66 in its thickness direction, but the thickness direction of the third extension 66 is the front-to-back direction. Therefore, although the locking hole 76 is formed in the third extension 66, the influence on the bending stiffness of the third extension 66 in the upward and downward directions can be reduced. That is, in this embodiment, the locking hole 76 can be easily formed while suppressing the reduction of the bending stiffness of the third extension 66 in the upward and downward directions.

[0066] Furthermore, in this embodiment, at the lower end of the protruding end 74 of the third extension 66, there is a recessed portion 78 between a pair of adjacent locking holes 76 in the longitudinal direction. Thus, the remaining portion at the lower end of the protruding end 74 of the third extension 66 is removed, thereby suppressing an increase in the weight of the yoke member 20.

[0067] Furthermore, in this embodiment, as the vehicle moves, the air passing between the rod 16 constituting the scraper body 15 and the blade 18 and scraper rubber 12 collides with the protruding end 74 of the third extension 66 of the yoke member 20. In this embodiment, the airflow velocity on the front side of the protruding end 74 is less than the airflow velocity on the upper side of the rod 16 and blade 18. Therefore, the force (lift) acting on the scraper body 15 in the vertical direction generated by the airflow accompanying the vehicle's movement can be adjusted to a desired force. Additionally, the vertical dimensions of the protruding end 74 can be appropriately set considering the lift generated on the scraper body 15.

[0068] In addition, such as Figure 6 as well as Figure 11 As shown, in this embodiment, when the wiper blade 10 moves to the rearward side so that the wiping part 24 of the wiper blade rubber 12 wipes the wiping surface of the windshield, the yoke member 20 rotates from the neutral posture shown by symbol P1 to the side shown by symbol P2, with the contact point between the front end side 80 at the upper end of the locking protrusion 68 of the yoke member 20 and the inner peripheral surface of the yoke member placement groove 42 as the center of rotation.

[0069] In addition, such as Figure 6 as well as Figure 12 As shown, when the wiper blade 10 moves forward and the wiping part 24 of the wiper blade rubber 12 wipes the wiping surface of the windshield, the yoke member 20 rotates from the neutral posture shown by symbol P1 to the other side shown by symbol P3, with the contact point between the rear end side 82 of the upper end of the locking protrusion 68 of the yoke member 20 and the inner peripheral surface of the yoke member placement groove 42 as the center of rotation.

[0070] Thus, the contact point when tilting to one side and the contact point when tilting to the other side are different positions in the width direction of the wiper blade 10.

[0071] And, as Figure 11 as well as Figure 12 As shown, in this embodiment, the tilt angle of the yoke member 20 from a neutral position to one side is greater than the tilt angle of the yoke member 20 from a neutral position to the other side. This allows for fine adjustment of the contact angle between the wiping portion 24 of the wiper rubber 12 and the wiping surface of the windshield when the wiper blade 10 is moving rearward, and the contact angle between the wiping portion 24 of the wiper rubber 12 and the wiping surface of the windshield when the wiper blade 10 is moving forward.

[0072] Furthermore, in the example described above, the tilt angle of the yoke member 20 from the neutral position to one side was described as greater than the tilt angle of the yoke member 20 from the neutral position to the other side, but this disclosure is not limited to this. The tilt angle of the yoke member 20 from the neutral position to one side and the tilt angle of the yoke member 20 from the neutral position to the other side can be appropriately set, taking into account the structure of the vehicle's windshield.

[0073] Furthermore, in this embodiment, an example is given where a recessed portion 78 is recessed between a pair of adjacent locking holes 76 in the longitudinal direction at the lower end of the protruding end 74 of the third extension 66; however, this disclosure is not limited to this. Whether or not to provide a recessed portion 78 in the third extension 66 can be appropriately set by considering factors such as the required weight of the yoke member 20.

[0074] Furthermore, in this embodiment, the example described is that the first locking portion 46 of the yoke member 20, such as the feed rod 16, is locked by a locking protrusion 68 formed in the first extension 62, and the second locking portion 48 of the yoke member 20, such as the feed rod 16, is locked by a locking hole 76 formed in the third extension 66. However, this disclosure is not limited to this. For example, it may be configured such that the locking hole 76 is formed in the first extension 62 and the locking protrusion 68 is formed in the third extension 66. Furthermore, it may be configured such that the locking protrusion 68 is formed in both the first extension 62 and the third extension 66, and it may also be configured such that the locking hole 76 is formed in both the first extension 62 and the third extension 66.

[0075] The above describes one embodiment of the present disclosure. However, the present disclosure is not limited to the above. In addition to the above, various modifications and implementations can be made without departing from the spirit of the present disclosure.

[0076] Furthermore, although this disclosure has been described with reference to embodiments, it should be understood that this disclosure is not limited to the above-described embodiments and structures. This disclosure also includes various modifications and equivalent variations. In addition, various combinations and methods, and further combinations and methods that include only one element or more or less, also fall within the scope and concept of this disclosure.

Claims

1. A windshield wiper blade, comprising: The wiper body has a first locking part and a second locking part, and moves together with the wiper arm to one side and the other side in the wiping direction. The wiper body has a rod connected to the wiper arm. A scraper rubber, wherein the scraper rubber moves to one side and to the other side via the scraper body to wipe the wiping surface; and A yoke member, formed of a metal plate and disposed between the scraper body and the scraper rubber. The yoke member has: a first extension having a first scraper body locking portion for locking by the first locking portion and extending along the length direction of the scraper rubber; a scraper rubber locking portion extending from the first extension and for locking by the scraper rubber; and a second extension extending from the end of the first extension opposite to the first scraper body locking portion toward the side opposite to the scraper rubber. And a third extension, the third extension having a second wiper body locking portion for locking the second locking portion and extending from the end of the second extension on the opposite side of the first extension to the wiper rubber side, the junction of the second extension and the third extension is folded back and the second extension coincides with the third extension, the wiper blade is provided with at least one of the yoke members on each side of the connecting portion formed as the middle part of the rod, and the second wiper body locking portion is a locking hole that penetrates along the thickness direction of the third extension.

2. The wiper blade as described in claim 1, characterized in that, The first scraper body locking part is a locking protrusion that protrudes in the thickness direction of the first extension part to the side opposite to the scraper rubber.

3. The wiper blade as described in claim 1, characterized in that, The plurality of locking holes are formed at intervals along the length of the third extension. At the end of the scraper rubber side of the third extension, a recess is formed between adjacent pairs of locking holes.

4. The wiper blade as described in claim 2, characterized in that, The plurality of locking holes are formed at intervals along the length of the third extension. At the end of the scraper rubber side of the third extension, a recess is formed between adjacent pairs of locking holes.

5. The wiper blade as described in any one of claims 1 to 4, characterized in that, The yoke member has a gap between itself and the scraper body, allowing it to tilt within a specified range with its contact point with the scraper body as the center of rotation. The position of the contact point when the scraper body moves to one side is different from the position of the contact point when the scraper body moves to the other side in the width direction.

6. The wiper blade as described in any one of claims 1 to 4, characterized in that, The third extension is positioned to allow air to collide between the scraper body and the scraper rubber.

7. The wiper blade as described in any one of claims 1 to 4, characterized in that, At least a portion of the second scraper body locking portion is disposed on one side of the scraper rubber relative to the first extension portion.

8. The wiper blade as described in any one of claims 1 to 4, characterized in that, The scraper body is configured to also include a wing plate disposed adjacent to the rod in the longitudinal direction. The rod and the wing are connected via the yoke member.

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