JPH0726266U - Wiper blade - Google Patents

Abstract

(57) [Abstract] [Purpose] There is almost no gap in the connecting part between adjacent levers, especially when the levers rotate with each other, the appearance is excellent, and there is no adverse effect on high-speed performance due to increased aerodynamic resistance. Provide a wiper blade. [Arrangement] The facing surfaces 3c, 4e and 4d, 5c of the connecting portions of the respective levers 3, 4, 5 with the adjacent levers are arc-shaped with the axes of the rotating shafts 4b and 5b of the connecting portions as centers. To form.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wiper blade which is connected to, for example, a windshield wiper device of an automobile and is used to wipe off raindrops and dust adhering to windshield glass.

[0002]

[Prior art]

 Conventionally, as the above-mentioned wiper blade, there is one having a structure as shown in FIG. 5, for example.

A wiper blade 100 shown in the figure is rotatably connected to a blade rubber 101 made of synthetic rubber having a substantially T-shaped cross section and five levers, that is, a wiper arm of a wiper device (not shown). A primary lever 102 and a secondary lever rotatably attached to both ends of the primary lever 102 by locking shafts 103a and 103a to hook-shaped locking portions 102a and 102a provided at both ends of the primary lever 102. 103, 103 and the similar hook-shaped engaging portions 103b, 103b provided on the tip portions of the secondary levers 103, 103, respectively, are engaged with the shafts 104a, 104a to attach the secondary levers 103, 103 to the tip portions thereof. It consists of yoke levers 104, 104 that are rotatably mounted. Then, the rubber engaging portions 104b and 103c provided at both ends of the yoke levers 104 and 104 and the end portions of the secondary levers 103 and 103 on the primary lever 102 side are provided with upper end edges of the blade rubber 101 having a T-shaped cross section. The blade rubber 101 is supported by the secondary levers 103 and 103 and the yoke levers 104 and 104 by fitting.

The wiper blade 100 is attached to a wiper arm of a wiper device (not shown), and reciprocally swings on the windshield glass while being pressed against a surface to be wiped such as windshield glass by an arm spring of the wiper arm. As a result, raindrops and dirt attached to the surface to be wiped are wiped off by the blade rubber 101. As described above, the yoke levers 104, 104 and the secondary levers 103, 103 are respectively the secondary levers 103, 103. Since the blade rubber 101 is supported by the yoke levers 104, 104 and the secondary levers 103, 103, the blade rubber 101 supported by the yoke levers 104, 104 and the secondary levers 103, 103 has a windshield. Since the blade rubber 101 can be freely curved following the curvature of the window glass, and the blade rubber 101 is always in contact with the entire surface to be wiped, even if the windshield glass has a curved surface, no wiping residue is left. Has become.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned conventional wiper blade 100, as described above, the levers 102, 103 and 104 are rotatable relative to each other so that the blade rubber 101 freely bends following the curvature of the windshield glass. As shown in FIG. 6 (a), a gap S is provided between adjacent levers 103 and 104 (similarly between levers 102 and 103) to secure a rotation range. Therefore, not only is the appearance design inferior, but also when the lever 104 rotates with respect to the lever 103 in the direction as shown in FIG. The aerodynamic resistance increases due to changes in the air flow during high-speed running, and the wiper blade 100 rises above the surface to be wiped of the windshield glass, There is a problem that might adversely affect the, is to solve these problems has been a challenge for performance-like and the design of conventional wiper blade.

[0006]

[The purpose of the device]

 This invention was made in view of the above problems in the conventional wiper blade, and even if the levers rotate relative to each other due to the curvature of the blade rubber, a large gap is generated between the levers adjacent to each other. The aim is to provide a wiper blade that does not have an appearance and is excellent in appearance and design, and that does not adversely affect high speed performance due to turbulence of the air flow.

[0007]

[Means for Solving the Problems]

 A wiper blade according to the present invention includes a blade rubber that abuts against a surface to be wiped, and a wiper including a plurality of levers that are rotatably connected to each other and that support the blade rubber so as to be bendable according to the curvature of the surface to be wiped. The blade is characterized in that the surface of the connecting portion of each lever facing the adjacent lever is formed in an arc shape around the axis of the rotating shaft of the connecting portion. The structure of such a wiper blade is used as a means for solving the above-mentioned conventional problems.

[0008]

[Function of the device]

 In the wiper blade according to the present invention, the facing surface of the connecting portion of each lever with the adjacent lever is formed in an arc shape around the axis of the rotating shaft of the connecting portion. Even if the lever is rotated in either direction, the distance between the facing surfaces of the adjacent levers does not change, and it is almost unnecessary to provide a gap between the adjacent levers, which may impair the external appearance. Since there is no change in the air flow during high-speed driving, no adverse effect on high-speed performance will occur.

[0009]

【Example】

 Hereinafter, the invention will be specifically described with reference to the drawings.

1 to 4 show an embodiment of a wiper blade according to the present invention, and FIGS. 1 and 2 are a front view and a plan view of the wiper blade, respectively.

The wiper blade 1 shown in the figure includes a synthetic rubber blade rubber 2 having a substantially T-shaped cross section, and five synthetic resin levers in this embodiment, namely, a primary lever 3 and a secondary lever. 4 and 4 and yoke levers 5 and 5 mainly.

That is, in the wiper blade 1, a primary lever 3 is rotatably connected to a tip end portion of a wiper arm 6 of a wiper device shown by phantom lines, and secondary levers 4 and 4 are respectively attached to both ends of the primary lever 3. The yoke levers 5 and 5 are rotatably connected to each other, and the yoke levers 5 and 5 are rotatably connected to the tips of the secondary levers 4 and 4, respectively, and both ends of the yoke lever 5 and the primary lever of the secondary lever 4 are connected. By fitting the upper edge of the blade rubber 2 having the T-shaped cross section to the rubber engaging portions 5a and 4a provided on the end portion on the 3 side, the blade rubber 2 is moved to the secondary levers 4, 4 as described above. It is also supported by the yoke levers 5 and 5.

FIG. 3 is an explanatory view showing a shape of each lever of the wiper blade 1 and a connecting portion structure for connecting the levers.

That is, the primary lever 3 shown in the figure is provided with a connecting shaft 3a for connecting to the wiper arm 6 at the center thereof, and has a bifurcated shape at both ends (only the right end is shown in FIG. 3). And a bearing portion 3b for receiving a shaft 4b of a secondary lever 4 described later is provided.

As described above, the secondary lever 4 is provided with the rubber engaging portion 4a for supporting the upper end edge of the blade rubber 2 at the left end portion in the drawing, and the bearing portion 3b of the primary lever 3 at the central portion. Is provided with a shaft 4b (rotating shaft) that fits into the shaft. The shaft has a shape similar to that of the bearing 3b of the primary lever 3 at the right end in the figure, and receives a shaft 5b of the yaw lever 5 described later. It has a bearing portion 4c for.

Further, as described above, the yoke lever 5 is provided with the rubber engaging portions 5a, 5 supporting the upper edge of the blade rubber 2 at both ends thereof, and the central portion thereof has the rubber lever engaging portions 5a, 5a. A shaft 5b (rotating shaft) fitted to the bearing portion 4c is provided.

The secondary lever 4 and the yoke lever 5 are fitted to the primary lever 3 and the secondary lever 4 by fitting their shafts 4b and 5b to the bearing portions 3b and 4c of the primary lever 3 and the secondary lever 4, respectively. It is rotatably connected.

The shafts 4b and 5b of the secondary lever 4 and the yoke lever 5 have a D-shaped cross section in which the left side surface in the figure is flatly cut, and the cut surface is positioned downward. In this state, that is, in a state where the secondary lever 4 and the yoke lever 5 are positioned substantially at right angles to the primary lever 3 and the secondary lever 4, the shafts 4b and 5b are inserted into the bearing portions 3b and 4c, respectively. Then, the shafts 4b and 5b can be easily fitted into the bearing portions 3b and 4c, and the secondary lever 4 and the yoke lever 5 can be rotated to a position orthogonal to the primary lever 3 and the secondary lever 4. The shafts 4b and 5b cannot be disengaged from the bearings 3b and 4c unless the secondary lever 4 and After the blade rubber 2 is attached to the rubber engaging portions 4a and 5a of the crank lever 5, the secondary lever 4 and the yaw lever 5 will not fall off from the primary lever 3 and the secondary lever 4 unless the blade rubber 2 is removed. .

At the connecting portion between the primary lever 3 and the secondary lever 4 and the connecting portion between the secondary lever 4 and the yoke lever 5, the facing surface 3 c of the primary lever 3 facing the secondary lever 4 and the primary lever 3 of the secondary lever 4 are connected. The facing surface 4d of the secondary lever 4 has an arc shape centered on the axis of the shaft 4b, and the facing surface 4e of the secondary lever 4 facing the yaw lever 5 and the facing surface 5c of the yoke lever 5 facing the secondary lever 4 are the shafts of the shaft 5b. Each of them is formed in an arc shape centered on the center, and when the levers are rotated, the distances between the facing surfaces 3c and 4d and the facing surfaces 4e and 5c in each connecting portion do not change. It suffices to provide the minimum gap required for smooth rotation between the facing surfaces of each connecting portion, as shown in FIG. 1 or FIG. 4 (a). As shown in the enlarged view, a good appearance with almost no visible gaps is obtained, and the aerodynamic characteristics with low air resistance are excellent.

Further, even when the secondary lever 4 is largely rotated with respect to the yoke lever 5, for example, as shown in FIG. 4B, the gap between the facing surfaces 4e and 5c is large. Since it does not spread, there is no increase in aerodynamic resistance, and there is no loss of appearance design or high speed.

[0021]

[Effect of device]

 As described above, the wiper blade according to the present invention has the above-described structure, that is, the connecting portion of each lever is formed in an arc shape with the surface facing the adjacent lever as the axis of the rotating shaft of the connecting portion. With this configuration, it is not necessary to provide a gap between adjacent levers, so a good appearance can be obtained, and even if the levers rotate with respect to each other, the gap widens. Since it does not exist, it has an excellent effect that the appearance and design are not deteriorated and the high-speed performance is not deteriorated due to an increase in aerodynamic resistance.

[Brief description of drawings]

FIG. 1 is a front view showing the shape of a wiper blade according to an embodiment of the present invention.

2 is a plan view of the wiper blade shown in FIG. 1. FIG.

FIG. 3 is an explanatory view showing a structure of a connecting portion of a lever in the wiper blade shown in FIG.

4 (a) and 4 (b) are explanatory views showing a turning state of a lever in the wiper blade shown in FIG.

FIG. 5 is a front view showing the shape of a conventional wiper blade.

6 (a) and 6 (b) are respectively explanatory views showing a turning state of a lever in the wiper blade shown in FIG.

[Explanation of symbols]

 1 wiper blade 2 blade rubber 3 primary lever (lever) 3c facing surface 4 secondary lever (lever) 4b shaft (rotating shaft) 4d facing surface 4e facing surface 5 yoke lever (lever) 5b shaft (rotating shaft) 5c facing surface

Claims (1)

[Scope of utility model registration request] 1. A wiper blade comprising: a blade rubber that abuts against a surface to be wiped; A wiper blade, wherein a surface of each of the connecting portions of the respective levers, which faces the adjacent lever, is formed in an arc shape around the axis of the rotation shaft of the connecting portion.