Scheibenwischerblatt

Abstract

Wiper blade (10) with: a blade body (15) which has a first locking mechanism (46) and a second locking mechanism (48) and which, together with a wiper arm, is pivotable in a wiping direction to a first side and a second side, and has a lever (16) joined to the wiper arm; a rubber blade (12) that wipes a target surface after a pivoting movement of the blade body (15) to the first side or the second side; and a yoke (20) made of a metal plate and arranged between the leaf body (15) and the leaf rubber (12), the yoke (20) having a first extension (62), a leaf rubber holder (84), a second extension (64), and a third extension (66), the first extension (62) having a first leaf body fit (68) into which the first locking mechanism (46) engages, the first extension (62) extending in a longitudinal direction of the leaf rubber (12), the leaf rubber holder (84) extending from the first extension (62) and engaging with the leaf rubber (12), the second extension (64) extending from an end of the first extension (62) away from the leaf rubber (12) that is arranged away from the first leaf body fit (68), the third extension (66) having a second leaf body locking mechanism (76) with which the second locking mechanism (48) is in engagement, with the third process (66) extending from an end of the second process (64),which is arranged away from the first extension (62), extends in the direction of the leaf rubber (12), the yoke (20) also having a twisted section that defines a boundary between the second extension (64) and the third extension (66), the second extension (64) and the third extension (66) overlapping each other, , characterized by the fact that at least one yoke (20) is provided on each side of a joint (30) which is designed as the middle section of the lever (16), and the second leaf body locking mechanism (76) is defined by a locking hole that passes through the third extension (66) in the direction of the thickness of the third extension (66).

Description

Technical field

[0001] This revelation refers generally to a windshield wiper blade. State of the art

[0002] Document JP 2020 - 045 034 A describes a windshield wiper blade for removing water droplets adhering to a vehicle's windshield. The wiper blade consists of a rubber blade and a wiper lever assembly that holds the rubber blade in place. The wiper lever assembly comprises a main lever, a pair of movable covers, and a pair of yoke levers. The main lever is connected to the wiper arm. The movable covers are attached to the ends of the main lever. The yokes are movably connected to the main lever and the movable covers. The wiper lever assembly holds the rubber blade securely in place by means of the movable covers and the yokes.

[0003] Document DE 10 057 253 A1 discloses a wiper blade according to the preamble of claim 1. Documents JP 2004-196 016 A and JP 2020-045 034 A disclose further wiper blades of the same type. SUMMARY OF THE INVENTION

[0004] The wiper blade disclosed in the above publication is, as described above, equipped with a yoke comprising a metal part and a resin yoke body located outside the metal part. The metal part is embedded in the yoke body using injection molding techniques. This design results in a complex yoke structure and increased costs for inserting the metal part.

[0005] One of the tasks of this revelation is to provide a wiper blade equipped with a simplified yoke structure.

[0006] The problem is solved by a wiper blade according to claim 1. Advantageous embodiments are described in the dependent claims.

[0007] According to one aspect of this disclosure, a wiper blade is provided comprising: (a) a blade body having a first locking mechanism and a second locking mechanism, which, together with a wiper arm, is pivotable to a first side and a second side in a wiping direction; (b) a blade rubber which, after a pivoting movement of the blade body to the first side or the second side, wipes a target surface; and (c) a yoke made of a metal plate and arranged between the blade body and the blade rubber. The yoke has a first extension, a wiper blade rubber holder, a second extension, and a third extension. The first extension has a blade body fitting with which the first locking mechanism engages. The first extension extends in the longitudinal direction of the wiper blade rubber. The wiper blade rubber holder extends from the first extension and engages in the wiper blade rubber.The second extension extends from the end of the first extension furthest from the first blade body fitting, away from the wiper blade rubber. The third extension has a second blade body locking mechanism with which the second locking mechanism engages. The third extension extends from the end of the second extension furthest from the first extension, toward the wiper blade rubber. The yoke also has a twisted section that defines a boundary between the second and third extensions. The second and third extensions overlap each other.

[0008] The above structure leads to a simplified structure of the yoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The above task, other tasks, features and benefits of this disclosure will be better understood with reference to the detailed description below and the accompanying drawings.

[0010] The drawings show: Fig. 1 a perspective view showing a windshield wiper blade according to one embodiment; Fig. 2 a perspective view showing a windshield wiper blade in which, according to one embodiment, the right and left wings are omitted; Fig. 3 a perspective view showing a windshield wiper blade in which, according to one embodiment, a lever and the right and left wings are omitted; Fig. 4 an exploded side view of a windshield wiper blade according to one embodiment; Fig. 5 a perspective exploded view illustrating a windshield wiper blade according to one embodiment; Fig. 6 a cross-sectional view of a windshield wiper blade along line 6-6 from Fig. 1; Fig. 7 a side view showing a yoke; Fig. 8 A side view showing a yoke, seen in a direction that is in Fig. 6 is the opposite; Fig. 9 an enlarged side view of a fitted bead of a yoke; Fig. 10 a view showing a windshield wiper blade in the direction indicated by arrow 3 in Fig. 3 indicates the direction; Fig. 11 a schematic view showing how a yoke tilts from a neutral position to a first side; and Fig. 12 A schematic view showing a yoke inclined from a neutral position to a second side, which is opposite the first side in Fig. 11 is opposite. FORM OF EXECUTION OF THE INVENTION

[0011] The wiper blade 10 according to the embodiment of the present disclosure is below referred to by reference to the Fig. 1 to 10 described.

[0012] The wiper blade 10 in this embodiment is, as shown in the Fig. As shown in Figures 1 to 5, the windshield wiper blade 10 is used to remove raindrops, etc., adhering to a wiped surface (also referred to as the target surface), which is an outer surface of a vehicle's windshield. In this embodiment, the windshield wiper blade 10 is implemented by a wiper blade used with a so-called tournament wiper.

[0013] The wiper blade 10 is connected to the head of a wiper arm (not shown) and is subject to mechanical pressure exerted by the wiper arm on the outer surface of the windshield glass. The wiper arm, together with the wiper blade 10 and a wiper motor, forms the windshield wiping device of a vehicle. The wiper blade 10 is pivoted back and forth across the outer surface of the windshield by a reciprocating motion of the wiper arm to a first and second side in the wiping direction. An arrow “UP” in the drawings indicates the top side of the wiper blade 10 in the vertical direction. The top side extends substantially orthogonally to the outer surface (i.e., the wiping area) of the windshield. The arrow “L” in the drawings indicates a side of the wiper blade 10 in its longitudinal direction.An arrow “FR” in the drawings indicates one of the opposite sides (also referred to as the first side) of the wiper blade 10 in the direction in which the wiper blade 10 is pivoted back and forth. Specifically, the side indicated by the arrow “FR” is defined as the side of the vehicle facing forward and obliquely downward when the vehicle's wiper assembly is in its rest position. In the following explanations, the vertical direction of the wiper blade 10 is simply referred to as the vertical direction. The longitudinal direction of the wiper blade 10 is simply referred to as the longitudinal direction. The opposite sides or directions in which the wiper blade 10 pivots back and forth are simply referred to as the front and back, or the forward direction and reverse direction, respectively.

[0014] The wiper blade 10, as it is in the Fig. 4 and Fig. Figure 5 shows the rubber blade 12 and the wiper lever assembly 14. The rubber blade 12 is used to wipe the outer surface of the windshield. The wiper lever assembly 14 holds the rubber blade 12 securely.

[0015] The wiper lever assembly 14 comprises the lever 16, a pair of wings 18, and a pair of yokes 20. The lever 16 has a length whose middle section is attached to the head of the wiper arm. The wings 18 are attached to the ends of the lever 16. Each yoke 20 connects the lever 16 to one of the wings 18. The wiper lever assembly 14 supports the rubber blade 12 by means of the wings 18 and the yokes 20. STRUCTURE OF LEAF RUBBER 12

[0016] The rubber blade 12 consists of a rubber strip of a specific length. The rubber blade 12 has the base 22 (i.e., the wiping strip) and the wiper section 24 (i.e., the wiper head). The base 22 is mechanically supported by the wiper arm assembly 14. The wiper section 24 extends downwards from the base 22 and, in use, is pressed with one edge against the outer surface of the windshield. A pair of reinforcing grooves 26 are formed in the base 22 of the rubber blade 12. These grooves extend longitudinally along the base 22 and open in opposite front-to-back directions of the vehicle. The reinforcing grooves 26 are grooves into which reinforcements, not shown, made of metal strips are fitted. The reinforcements serve to distribute the physical pressure exerted by the wiper arm on the outer surface of the windshield along the longitudinal direction of the rubber blade 12.In the base 22 of the leaf rubber 12 a pair of retaining grooves 28 is also formed, which are located below the support grooves 26, extend in the longitudinal direction and open in the opposite front and rear direction of the vehicle. WIPER LEVER ASSEMBLY 14

[0017] The wiper lever assembly 14 has, as already described, the lever 16, the pair of wings 18 and the pair of yokes 20. The wiper lever assembly 14 is shaped such that its length is symmetrical to a section that is connected to the wiper arm. LEVER CONSTRUCTION 16

[0018] The lever 16 consists of a strip of resin material of a specific length, extending longitudinally along the wiper blade 10. The lever 16 defines a central section of the wiper lever assembly 14. The lever 16 has a length such that its central section forms a joint 30. The lever 16 also has a pair of arms 32 extending from the joint 30 in opposite directions.

[0019] Joint 30 is, as in Fig. As can be seen in Figure 5, the joint is rectangular in plan view. A connecting shaft, not visible in the plan view, is arranged in the joint 30, to which the head of the wiper arm is attached using the connecting clamp 34.

[0020] The arms 32 extend from the ends of the joint 30 in the opposite longitudinal direction. Each of the arms 32 has, as shown in the Fig. 5 and Fig. 6 can be clearly seen, a downwardly open cross-section seen in the longitudinal direction of the lever 16.

[0021] Each of the arms 32, as in Fig. As shown in Figure 6, the upper wall 36, the front wall 38, and the rear wall 40 are formed. The front wall 38 extends downwards from a front end of the upper wall 36. The rear wall 40 extends downwards from a rear end of the upper wall 36. Each of the arms 32 also has a groove 42 formed between the front wall 38 and the rear wall 40, extending longitudinally and open on one underside. The yoke groove 42 has a front section 42F and a rear section 42R. Each of the arms 32 has an intermediate wall 44 located between the front section 42F and the rear section 42R. The intermediate wall 44 projects downwards. The yoke groove 42 is shaped such that, measured from an open end of the rear section 42R, it has a depth greater than that of the front section 42F, measured from the open end.

[0022] Each of the arms 32 also has first locking sections 46 and second locking sections 48. The first locking sections 46 are cylindrical and project rearward from the front wall 38 into the yoke groove 42. The second locking sections 48 are cylindrical and project forward from the rear wall 40 into the yoke groove 42. The first locking sections 46 are arranged such that they face the second locking sections 48 in the forward and backward directions of the vehicle, i.e., in the lateral direction of the lever 16. In particular, a first arm 32 has two first locking sections 46 and two second locking sections 48. The first locking sections 46 are spaced apart longitudinally. The second locking sections 48 are also spaced apart longitudinally.Similarly, a second arm 32 has two first locking sections 46 and two second locking sections 48. The first locking sections 46 of the second arm 32 are arranged longitudinally apart from each other. The second locking sections 48 of the second arm 32 are also arranged longitudinally apart from each other.

[0023] Each of the arms 32 has on its upper side the inclined surface 32A, which extends obliquely upwards in a rearward direction. WING STRUCTURE 18

[0024] Each of the wings, number 18, is, as seen from the Fig. 4 and Fig. As can be seen in Figure 5, it is made from a strip of resin material of a specific length. The wings 18 extend from the ends of the lever 16 in opposite longitudinal directions of the lever 16. Each of the wings 18 has a downwardly open cross-section.

[0025] Each of the wings 18, as in Fig. As shown in Figure 5, the upper wall 50, the front wall 52, and the rear wall 54 are formed. The front wall 52 extends downwards from a front end of the upper wall 50. The rear wall 54 extends downwards from a rear end of the upper wall 50. Each of the sashes 18 also has a groove 56, located between the front wall 52 and the rear wall 54, opening at their underside and extending longitudinally along their length. The groove 56 has a front section 56F and a rear section 56R. Each of the sashes 18 also has a partition wall 58, located between the front section 56F and the rear section 56R. The partition wall 58 projects downwards from the sash 18. The yoke groove 56 is shaped such that, measured from an open end of the rear section 56R, it has a greater depth than that of the front section 56F, measured from that open end.In other words, each of the wings 18 has a section near the lever 16 that is identical in structure to the arms 32 of the lever 16. Each of the wings 18 has a length whose central section has a single first locking section and a single second locking section, corresponding to the first locking sections 46 and the second locking sections 48 of one of the arms 32 of the lever 16 (see . Fig. 6).

[0026] Each of the wings 18, like the arms 32, has an inclined surface 18A on its upper side, extending rearward and upward. The wings 18 and the lever 16 form the blade body 15, which forms a design surface of the wiper blade 10.

[0027] Each of the wings 18 has an end section located further away from the lever 16, which includes the rubber blade retaining section 60 that fits into or holds one of the corresponding ends of the rubber blade 12. The rubber blade retaining section 60 has a pair of front and rear retaining fingers 60A extending downwards from the front wall 52 and the rear wall 54, respectively. The front and rear retaining fingers 60A have heads (i.e., lower sections) that are bent from their main sections so that they face each other, allowing them to fit into the retaining grooves 28 described above. In this way, a connection between the ends of the rubber blade 12 and the rubber blade retaining sections 60 is achieved. JOCHE 20

[0028] Each of the 20 yokes is, as in the Fig. 7 and Fig. Figure 8 shows a shape that extends longitudinally along the wiper blade 10. Each of the yokes 20 is manufactured by bending a metal plate cut into a predetermined shape. The yokes 20 are identical in construction.

[0029] Each of the 20 yokes is, as in the Fig. As can be seen in figures 4 to 6, it is arranged between the lever 16 and one of the wings 18 of the leaf body 15 and the leaf rubber 12. Each of the yokes 20 has, as shown in the Fig. 6 and Fig. As can be seen in Figure 7, the first process 62, the second process 64, and the third process 66 are shown. The first process 62 lies along the upper surface of the base 22 of the leaf gum 12. The second process 64 projects upwards from a posterior end of the first process 62, away from the leaf gum 12. The third process 66 faces away from an upper end of the second process 64 and extends downwards towards the leaf gum 12.

[0030] The first process 62 has a rectangular shape and thickness in the vertical direction. The first process 62 extends both anteriorly and posteriorly as well as longitudinally. As in the Fig. 6, Fig. 7 and Fig. As shown in Figure 9, locating ridges 68 are formed at a front end of the first extension 62. The locating ridges 68 project away from the leaf rubber 12 (i.e., upwards) in the thickness direction of the first extension 62. The locating ridges 68 are fitted into the first leaf body. In particular, in this embodiment, three locating ridges 68 are formed at the front end of the first extension 63. The locating ridges 68 are arranged at a predetermined distance from each other in the longitudinal direction of the first extension 63. Each of the locating ridges 68 has a lower surface that is U-shaped and open downwards when viewed from the front of the first extension 63.

[0031] The second extension 64 is, as in the Fig. 6 and Fig. As can be seen in Figure 7, it is rectangular in shape and has a thickness in the front-to-back direction. The second process 64 extends both vertically and longitudinally. The second process 64 has, as shown in Fig. Figure 7 shows a dimension measured in a vertical direction, which gradually decreases from a middle section of its length towards the sections of its length.

[0032] The third extension 66 is, as in the Fig. 6 and Fig. 8 is rectangular in shape and has a thickness in the front-to-back direction. The third extension 66 extends both vertically and longitudinally. Each of the yokes 20 has, as shown in Fig. As can be clearly seen in Figure 6, there is a curved or twisted section 70 that forms the boundary between the second process 64 and the third process 66. The curved section 70 is U-shaped and is produced by bending downwards from one of the second process 64 and the third process 66 to the other, so that the upper sections of the second process 64 and the third process 66 overlap each other in the direction of their thickness. The upper section of the third process 66 is also referred to as the overlap 72, which coincides with the upper section of the second process 64. The third process 66 has a lower section that extends downwards outside the lower surface of the first process 62. The lower section of the third process 66 is also referred to as the process end 74. The extension end 74 has a lower end which is arranged so that it is opposite the upper end of the base 22 of the leaf rubber 12 in the forward-backward direction.This causes air that has passed through a gap between the lever 16 and the wings 18 of the leaf body 15 and the leaf rubber 12 to meet the extensions 74 of the third extensions 66.

[0033] Locking holes 76 are formed in the middle sections of the third extension 66's vertical width. The locking holes 76 extend through the third extension 66 in the direction of its thickness and function as a second leaf body locking mechanism. Specifically, three locking holes 76 are formed in the third extension 66, spaced apart from one another along its longitudinal direction. The locking holes 76 are substantially congruent with the fitted ridges 68 in both the longitudinal and vertical directions. Each of the locking holes 76 has, as shown in Fig. As can be seen in Figure 8, the third extension 66 has a rectangular shape when viewed from the rear. Each of the locking holes 76 has an upper edge that is bent in a U-shape and has a lower opening. Each of the locking holes 76, as shown in Figure 8, has a rectangular shape when viewed from the rear. Fig. As can be seen in Figure 6, the third extension 66 is located between a lower end of the overlap 72 and an upper end of the extension end 74, such that the lower end of each of the locking holes 76 is positioned closer to the leaf rubber 12 than the first extension 62. The third extension 66 has, as shown in Fig. As can be clearly seen in Figure 8, there are two recesses 78 formed in the lower end of the extension 74. Each of the recesses 78 is located longitudinally between two adjacent locking holes 76.

[0034] The first two locking sections 46, which are formed on a first of the arms 32 (hereinafter also referred to as first arm 32) of the lever 16, are, as shown in the Fig. 2, Fig. 5 and Fig. The two second locking sections 48 of the first arm 32 of the lever 16 are fitted into the two locking holes 76 formed in the middle section of the length of the first yoke 20 and the second end section of the first yoke 20, as shown in Figure 6. Although not shown, the first locks (i.e., the first locking sections) formed on a first wing (hereinafter also referred to as the first wing 18) of the wings 18 near the first end face of the lever 16 engage in the locking ridges 68 formed on the first end section of the first yoke 20. Similarly, second locks (i.e.,The second locking sections, which are formed on the first wing 18 near the first end face of the lever 16, engage in the locking holes 76 formed in the first end section of the first yoke 20. This creates a connection between the first wing 18 and the lever 16 with the first yoke 20. In particular, the lever 16 and the first wing 18 are aligned with each other in the longitudinal direction of the wiper blade 10 and are attached to the first yoke 20.

[0035] As in the structure above, the two first locking sections 46, formed on a second of the arms 32 (hereinafter also referred to as the second arm 32) of the lever 16, are fitted onto the two locating ridges 68 formed on the middle longitudinal section of a second (also referred to as the second yoke 20) of the yoke 20 and a first end section of the second yoke 20 located close to the second arm 32. The two second locking sections 48 of the second arm 32 of the lever 16 are fitted into the two locking holes 76 formed in the middle longitudinal section of the second yoke 20 and the first end section of the second yoke 20. First lockings (i.e.,The first locking sections 46, formed on a second wing 18 (hereinafter also referred to as the second wing 18) near the second end face of the lever 16, engage in the locating ridges 68 formed on the second end face of the second yoke 20. Similarly, second locking mechanisms (i.e., the second locking sections 48), formed on the second wing 18 near the second end face of the lever 16, engage in the locking holes 76 formed in the second end face of the second yoke 20. This establishes a connection between the second wing 18 and the lever 16 with the second yoke 20. In other words, the lever 16 and the second wing 18 are aligned with each other along the longitudinal direction of the wiper blade 10 and are attached to the second yoke 20.

[0036] In the yokes 20 to which the lever 16 is attached, the first extension 62 is each of the yokes 20, as in Fig. Figure 6 shows the first section 42F of the yoke groove 42 formed in the arm 32 of the lever 16. The second extension 64 and the overlap 72 of the third extension 66 of each yoke 20 are provided in the rear section 42R of the groove 42 of the arm 32 of the lever 16. Although not shown, in a state where the wings 18 are attached to the yokes 20, the first extensions 62 of the yokes 20 are arranged in the front sections 56F of the yoke grooves 56 formed in the wings 18. The second extensions 64 and the overlaps 72 of the third extensions 66 of the yokes 20 are arranged in the rear sections 56R of the yoke grooves 56 formed in the wings 18.

[0037] Between each of the yokes 20 and the inner circumferential surface of a corresponding yoke pass groove 42, there are clearances. This allows each of the yokes 20 to pivot or oscillate about its axis within a certain angular range, the axis being defined as extending in its longitudinal direction. Fig. Figure 6 shows the yokes 20 in the rest position of the wiper blade 10. This position of the forks 20 relative to the lever 16 is referred to below as the neutral position.

[0038] In particular, when the wiper section 24 of the blade rubber 12 wipes over the outer surface of the disc after a backward movement of the wiper blade 10, it causes each of the yokes 20 to rotate from the neutral position about a point of contact between the upper front corner 80 of each of the locating ridges 68 of the yoke 20 and the inner circumferential surface of the yoke locating groove 42 to the first side FR.

[0039] When the wiper section 24 of the blade rubber 12 wipes over the outer surface of the windshield after the forward movement of the wiper blade 10, it will alternatively cause each of the yokes 20 to rotate from the neutral position about a point of contact between the upper rear end 82 of each of the locating ridges 68 of the yoke 20 and the inner circumferential surface of the yoke locating groove 42 to the second side opposite the first side FR.

[0040] The clearances between the wing 18 of each of the yokes 20 and the yoke groove 56 are identical to those between each of the yokes 20 and the inner circumferential surface of the yoke groove 42 of the lever 16.

[0041] As from the Fig. 2, Fig. 5 and Fig. As can be seen in Figure 10, each of the yokes 20 has the rubber blade holders 84, which are arranged at their end sections and hold a central section of the length of the rubber 12. Each of the rubber blade holders 84 has a pair of front and rear locking fingers (locking elements) 84A, which project downwards from a front and a rear end section of the yoke 20. The front and rear locking fingers 84A have heads (i.e., lower ends) that are bent so that they lie directly opposite each other and fit into the grooves 28 described above. This supports the central section of the length of the rubber blade 12 with the aid of the rubber blade holders 84. FUNCTIONALITY AND BENEFITS OF THIS FORM

[0042] The functionality and advantageous effects of this embodiment are described below.

[0043] The wiper blade 10 in this embodiment has, as shown in Fig. 5 and Fig. As can be seen in Figure 6, the lever 16 and the wings 18 of the wiper blade body 15 are attached. The wiper blade 10 also has the yokes 20, which hold the blade rubber 12 and each consist of a metal plate. Each of the yokes 20 has, as described above, the first extension 62, the second extension 64, and the third extension 66. The boundary between the second extension 64 and the third extension 66 is defined by the turned section 70 of the yoke 20, creating an overlap between the second extension 64 and the third extension 66. In this way, the required rigidity of the yokes 20 is ensured with a simplified structure. Applying the configuration or dimensions of the yokes 20 to different types of lever 16 and wings 18 is achieved by changing the position of the turned section 70.

[0044] The wiper blade 10 shows, as can be seen from the Fig. 6, Fig. 7 and Fig. As can be seen in Figure 9, the fitting ridges 68 are formed on the first extension 62 of each of the yokes 20 and on which the first locking sections 46 of the lever 16 are fitted. This ensures the required bending stiffness of the first extension 62 in the vertical direction, thereby increasing the bending stiffness of the yokes 20 in the vertical direction.

[0045] The wiper blade 10, as it is in the Fig. 6 and Fig. Figure 8 shows the locking holes 76 formed in the third extension 66 of each of the yokes 20, in which the second locking sections 48 of the lever 16 are inserted. This facilitates the production of the locking holes 76 when cutting a metal plate to manufacture each of the yokes 20. The locking holes 76 are configured to pass through the thickness of the third extension 66, but minimize adverse effects on the stiffness when bending the third extension 66 in the vertical direction, since the third extension 66 is oriented so that its thickness direction coincides with the front and rear directions of the vehicle. The structure of the wiper blade 10 in this embodiment therefore facilitates the formation of the locking holes 76 without affecting the bending stiffness of the third extensions 66 in the vertical direction.

[0046] The third extension 66: Each of the yokes 20 has, as described above, the pair of recesses 78 formed in the lower end of the extension end 74. Each of the recesses 78 is located longitudinally between two adjacent locking holes 76. This removes unwanted parts of the lower end of the extension end 74 of the third extension 66, resulting in a reduced weight of the yokes 20.

[0047] The air passing through the gaps between the lever 16 and the wings 18 of the blade body 15 and the blade rubber 12 during travel impinges on the extensions 74 of the third extensions 66 of the yokes 20. In this embodiment, the velocity of the airflow at the front of the extension 74 is lower than that of the airflow at the upper surfaces of the lever 16 and each of the wings 18, thus allowing the vertical force (i.e., lifting force) exerted on the blade body 15 by the airflow resulting from the vehicle's movement to be adjusted to a desired level. The vertical dimension of the extension 74 can be determined depending on the lifting force acting on the blade body 15.

[0048] When the wiper section 24 of the rubber blade 12 wipes the outer surface of the windshield after the reverse movement of the wiper blade 10, each of the yokes 20, as shown in the Fig. 6 and Fig. 11 shown, from the neutral position P1 to the first side P2 about a point of contact between the upper front corner 80 of each of the ribs 68 of each of the yokes 20 and the inner circumferential surface of the yoke groove 42 rotated or inclined.

[0049] Alternatively, when the wiper section 24 of the wiper blade rubber 12 wipes the outer surface of the windshield after a forward movement of the wiper blade 10, each of the yokes 20, as shown in the Fig. 6 and Fig. Figure 12 shows that the wiper blade is inclined or rotated from the neutral position P1 to the second side P3 about a point of contact between the upper rear section 82 of each of the locating ridges 68 and each of the yokes 20 and the inner circumferential surface of the yoke groove 42. As can be seen from the above, the point of contact between each of the locating ridges 60 and a corresponding yoke 20 is changed between the movements of each yoke 20 to the first side P2 and to the second side P3 in the lateral direction of the wiper blade 10.

[0050] In this embodiment, an angle at which each of the yokes 20 tilts from the neutral position to the first side is shown, as in the Fig. 11 and Fig.The angle shown on 12 is greater than the angle by which each of the yokes 20 tilts from the neutral position to the other side. By choosing such angles, the angles at which the section 24 of the wiper rubber 12 contacts the outer surface of the windshield when the wiper blade 10 moves back and forth can be adjusted with high accuracy to the required angles.

[0051] The above discussion referred to the example where the angle by which each of the yokes 20 tilts from the neutral position to the first side is greater than the angle by which each of the yokes 20 tilts from the neutral position to the second side, but the wiper blade 10 may alternatively be designed to determine the angle by which each of the yokes 20 tilts or rotates from the neutral position to the first or second side, depending on the structure of a vehicle's windshield.

[0052] The above discussion also referred to the example in which the extension end 74 of the third extension 66 of each of the yokes 20 has the recesses 78 which are arranged between two adjacent locking holes 76 in the longitudinal direction of the yoke 20, however, the wiper blade 10 may alternatively be designed such that it does not have the recesses 78, depending on a required weight of the yoke 20.

[0053] The above discussion also referred to the example in which each of the yokes 20 is designed to have the locating ridges 68 formed on its first extension 62 and engaging in the locking sections 46 of the lever 16, and each of the yokes 20 is also designed to have the locking holes 76 formed in its third extension 66 and into which the second locking sections 48 of the lever 16 are fitted, but the wiper blade 10 may alternatively be designed such that the locking holes 76 are formed in the first extension 62 and the locating ridges 68 are also formed on the third extension 66. The wiper blade 10 can also be designed such that the locating ridges 68 are formed on both the first extension 62 and the third extension 66 and / or that the locking holes 76 are formed in both the first extension 62 and the third extension 66.

Claims

[1] Wiper blade (10) with: a blade body (15) which has a first locking mechanism (46) and a second locking mechanism (48) and which, together with a wiper arm, is pivotable in a wiping direction to a first side and a second side, and has a lever (16) joined to the wiper arm; a rubber blade (12) that wipes a target surface after a pivoting movement of the blade body (15) to the first side or the second side; and a yoke (20) made of a metal plate and arranged between the leaf body (15) and the leaf rubber (12), the yoke (20) having a first extension (62), a leaf rubber holder (84), a second extension (64), and a third extension (66), the first extension (62) having a first leaf body fit (68) into which the first locking mechanism (46) engages, the first extension (62) extending in a longitudinal direction of the leaf rubber (12), the leaf rubber holder (84) extending from the first extension (62) and engaging with the leaf rubber (12), the second extension (64) extending from an end of the first extension (62) away from the leaf rubber (12) that is arranged away from the first leaf body fit (68), the third extension (66) having a second leaf body locking mechanism (76) with which the second locking mechanism (48) is in engagement, with the third process (66) extending from an end of the second process (64),which is arranged away from the first extension (62), extends in the direction of the leaf rubber (12), wherein the yoke (20) also has a twisted section that defines a boundary between the second extension (64) and the third extension (66), wherein the second extension (64) and the third extension (66) overlap each other, characterized by , that at least one yoke (20) is provided on each side of a joint (30) which is designed as the middle section of the lever (16), and the second leaf body locking mechanism (76) is defined by a locking hole that passes through the third extension (66) in the direction of the thickness of the third extension (66). [2] Wiper blade according to claim 1, wherein the first blade body fit (68) is defined by a bead projecting from the blade rubber (12) in the direction of the thickness of the first extension (62). [3] Wiper blade according to claim 1, wherein the locking hole has a plurality of locking holes, the multitude of locking holes in a longitudinal direction of the third extension (66) is arranged at a distance from each other, the third extension (66) has a recess which is formed in an end facing the leaf rubber (12) and is arranged between two adjacent locking holes. [4] Wiper blade according to one of claims 1 to 3, wherein the yoke (20) has a clearance between itself and the blade body (15) which allows the yoke (20) to tilt about a point of contact between the yoke (20) and the blade body (15) within a given angular range, wherein the point of contact is changed in a direction of the width of the wiper blade between the movement of the blade body (15) to the first side and the movement of the blade body (15) to the second side. [5] Wiper blade according to one of claims 1 to 4, wherein the third extension (66) is arranged where air which has passed through a free space between the blade body (15) and the blade rubber (12) meets the third extension (66). [6] Wiper blade according to any one of claims 1 to 5, wherein at least one section of the second blade body locking (76) is arranged closer to the blade rubber (12) than the first extension (62). [7] Wiper blade according to any one of claims 1 to 6, wherein the blade body (15) has the lever (16) joined to the wiper arm and a wing (18) arranged in the longitudinal direction of the lever (16) next to the lever (16), wherein the lever (16) and the wing (18) are connected to each other by the yoke (20).

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