JPH0118447Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a wiper blade used to sweep rainwater and snow adhering to the window glass of vehicles such as automobiles.

(Prior art) Conventionally, there are tournament type and torsion type wiper blades for wiping vehicle windshields, but the former applies only the arm pressure component to the fulcrum of each lever, so it is difficult to use on curved glass. The tip of the lever will float, and the latter applies torsion pressure to the primary lever.If the primary lever is long, sufficient pressure will not be applied to the lever at the tip of the curved glass, resulting in poor followability. It had drawbacks.

For example, British Patent No. 1090415 (Nos. 4 and 5)
The purpose is to apply spring pressure evenly to the wiper blade rubber.

In order to achieve that purpose, the primary lever 21 has no extension beyond the joint described below.
It has a structure in which a joint part 22 is provided at both ends of the joint part 22, and a secondary lever 23 and a secondary yoke 24 are jointed to the joint part 22 at the same time.

With this structure, the spring 25,
Torsion pressure is applied to the secondary lever 23 via 26, and is applied evenly to the entire blade, so when wiping a particularly sharply curved area such as both sides of the windshield, the blade does not follow the windshield. There are drawbacks such as inability to wipe curved surfaces well.

(Problem to be solved by the invention) The invention was made to solve the above-mentioned drawbacks, and the wiper blade is fixed to the curved glass.
The purpose is to improve the followability of the tip of the blade to completely wipe the vehicle window.

(Means for Solving the Problems) In the present invention, a primary lever 1 is provided with a joint part 2, a yoke lever 3 is pivotally supported on each joint part 2 to form a secondary lever, and one end of the primary lever 1 is provided with a joint part 2. is extended to provide a joint 4, and a yoke lever 6 is joined to the joint 4 via a torsion spring 5 to form a secondary lever, and the torsion spring 5 is connected to the joint 4 and the yoke lever 6, respectively. This wiper blade is attached to the provided claws 7 and 8, and is configured to make the torsion pressure against the glass surface on the extended side of the primary lever stronger than that on the glass surface on the non-extended side of the primary lever.

(Function) Since the present invention is configured as described above, when arm pressure is applied to the wiper blade, component forces of the arm pressure are applied to points b, c, d, and e shown in FIG.
Furthermore, torsion pressure of the yoke lever 6 is applied to point a by the action of a torsion spring 5 provided at the joint portion 4. Furthermore, primary lever 1
Since the yoke lever 6 on the peripheral end side of the wiper blade is joined by extending from the joining part 2 between the yoke lever 3 and the yoke lever 3, the yoke lever 6 is shortened, and the torsion pressure on the peripheral end side is stronger than on the rear end side of the wiper blade.
It becomes possible to sufficiently follow the curved portion of the glass surface, and the glass surface can be wiped well.

(Example) An example of the present invention will be described below based on the drawings. In FIG. 1, a primary lever 1 is provided with a joint 2, a yoke lever 3 is pivotally supported on each joint 2 to form a secondary lever, and one end of the primary lever 1 is further extended to form a joint 4. As shown in FIG. 3, a yoke lever 6 is connected to the joint portion 4 via a torsion spring 5 to form a secondary lever. In this case, the torsion spring 5
are attached to claws 7 and 8 provided on the joint portion 4 and yoke lever 6, respectively, and set so that torsion pressure is applied to the glass surface.

(Effect of the invention) As is clear from the above explanation, according to the invention, when wiping a vehicle window glass, the secondary lever provided at the tip can follow the curved surface of the curved glass. , curved glass can be completely wiped.

[Brief explanation of the drawing]

Fig. 1 is a front view of the wiper blade, Fig. 2 is an enlarged partially cutaway front view of the same as above, Fig. 3 is a partially cutaway plan view showing the joint of the tip of the same as above, Figs. The figure is an explanatory diagram of a conventional example. 1...Primary lever, 2, 4...Joint part, 3, 3', 6...Yoke lever, 5...Torsion spring, 7, 8...Claw, 9...Arm, 10...Mounting body, 11... Wiping rubber (rubber brush).

Claims (1)

[Scope of utility model registration request] The primary lever 1 is provided with a joint part 2, and a yoke lever 3 is pivotally supported on each joint part 2 to form a secondary lever.One end of the primary lever 1 is further extended to provide a joint part 4, and the joint part 2 is provided with a joint part 2. A yoke lever 6 is joined to 4 via a torsion spring 5 to form a secondary lever, and the torsion spring 5 is attached to claws 7 and 8 provided on the joint 4 and the yoke lever 6, respectively.
A wiper blade characterized in that the torsion pressure on the glass surface on the extended side of the primary lever is made stronger than on the glass surface on the non-extended side of the primary lever.