JPS6329635Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a wiper for a vehicle.

Conventionally, wiper blade a was used as this type of wiper.
Two primary levers b supporting the wiper blade a are pivoted at the center in the length direction of the wiper blade a by an axis c in the direction of the axis A-A orthogonal to the longitudinal direction and an axis c in the direction of the axis A-A orthogonal to the wiper blade a. is known.

However, as shown in Fig. 1, a torsion spring d that springs both ends of the primary lever b downward is interposed on the shaft c, so that the wiper blade a is aligned with the windshield surface, and a clip e is attached to the shaft c. The arm f is attached via the. For this reason, each primary lever b can swing around the axis c with respect to the arm f, but cannot swing in the axial direction of the axis c.
The prying force acting on the wiper when the wiper swings is absorbed by the bending of the neck g provided on the wiper blade a and the distorted shape of the wiper blade, as shown in FIG. 1a. For this reason, the wiper blade a is easily damaged, and furthermore, there are disadvantages such as generation of noise due to metal-to-metal contact at the contact portion between the clip e and the primary lever b.

The purpose of the present invention is to obtain a wiper for a vehicle that does not have such inconvenience, and the left and right primary levers 2 that support the wiper blade 1 are positioned at the center of the wiper blade 1 in the longitudinal direction. An arm 5 is attached to each central upper surface of the primary lever 2 via an elastic rubber body 4 in a structure that is supported by a shaft 3 extending in the direction of orthogonal axes A-A. Shells 6, 7 inside and outside
Attach the arm 5 to increase the spring constant in the A-A direction.
On the other hand, the primary lever 2 is provided with a characteristic that it is sheared and deformed in the direction B-B in which the primary lever 2 is twisted, resulting in a lower spring constant. The illustrated elastic rubber body 4 is made of synthetic rubber, and has an inner shell 6 with a mountain-shaped cross section at the center of its lower surface, and an outer shell 7 that covers the upper and side surfaces of the elastic rubber body 4 on the outer surface, which are made into one piece by vulcanization molding. It was designed to have the above characteristics by being attached to the. In this case, the inner shell 6 must be separated on the left and right sides, but the shell 7
As shown in the figure, the left and right sides can be connected to each other.

The shapes of the inner and outer shells 6, 7 are not limited to those described above, but may be flat as shown in FIG. 5 or other shapes.

Also, a primary lever 2 is installed at the inner end of the shell 6 that covers the inner surface.
A rivet 10 is attached to the upper surface of the primary lever 2 at the outer end of the protrusion 9 that engages with the engagement hole 8 formed on the upper surface.
A tightening allowance 14 is provided to fix each shell 6, 6 to the primary lever 2.

Note that the arm 5 can be attached by attaching the tip of the arm 5 to the outside of the outer shell 7 as one piece as shown in FIG. 2, but it is also possible to attach a clip (not shown) to the shell 7. , the tip of the arm 5 may be inserted into this.

In the drawing, 11 is a secondary lever, 12 is a packing for supporting the wiper blade 1 on the primary lever 2 and the secondary lever 11, and 13 is a neck portion provided on the wiper blade 1.

In this case, when this is pressed against the windshield surface, the compressive deformation of the elastic rubber body 4 causes both primary levers 2 to swing around the shaft 3, similar to a conventional torsion spring. The wiper blade 1 can be adapted to the curved windshield surface, and when the arm 5 is then swung to wipe the windshield surface with the wiper blade 1, an elastic rubber body is attached in the direction of the swiveling of the arm 5. 4 has a high spring constant, each primary lever 2 is stably supported by the arm 5 without swinging back and forth in the wiping direction, and the prying force acting on the wiper blade 1 during wiping is elastic. As the rubber body 4 is sheared and deformed, the primary lever 2 itself tilts and absorbs this, so the tip of the wiper blade 1 can be positioned as a windshield at a desired angle by the inclination of the primary lever 2 itself, without causing strain on the wiper blade 1. can be applied by contact.

In this way, according to the present invention, the arms 5 are attached to each center upper surface of the primary lever 2 via the elastic rubber bodies 4, so that the arms 5 are not attached to the upper center surface of the primary lever 2 as in the conventional example.
No noise is generated due to contact between the primary lever 2 and the elastic rubber body 4.
The shells 6 and 7 are attached to the inside and outside of the shells to increase the spring constant in the A-A direction.
Since B-B in the direction of prying is given a property of being sheared and having a lower spring constant, each primary lever 2 can be stably supported with respect to the arm 5 without swinging from side to side, and the wiper The elastic rubber body 4 protects against the prying force generated when the blade 1 contacts the windshield surface and swings.
Because the primary lever 2 itself is tilted with respect to the arm 5 due to the deformation of the wiper blade 1, the wiper blade 1 is not strained. This has the effect of reducing the strain on the blade 1, thereby providing a wiper that can be used for a long period of time.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional wiper blade, Fig. 1a is a cross-sectional view showing a distorted shape of a conventional wiper blade, Fig. 2 is a perspective view of an example of the implementation of the present invention, and Fig. 3 is a main part of the wiper blade. FIG. 4 is a cutaway front view, FIG. 4 is a cross-sectional view taken along the line -- in FIG. 3, and FIG. 5 is a perspective view of a main part of a modified example. 1... Wiper blade, 2... Primary lever, 3... Shaft, 4... Elastic rubber body, 5... Arm,
6,7...shell.

Claims (1)

[Scope of utility model registration request] In the case where the left and right primary levers 2 supporting the wiper blade 1 are pivotally supported at the center of the length direction of the wiper blade 1 by a shaft 3 extending in the axis line A-A direction perpendicular to the length direction, the primary lever 2 An arm 5 is attached to the central upper surface of each of the arms 5 through an elastic rubber body 4, and shells 6 and 7 are attached to the inside and outside of the elastic rubber body 4 to increase the spring constant of the arm 5 in the direction of the axis A-A. A wiper for a vehicle has a characteristic that the primary lever 2 is sheared and deformed in the direction B-B in which the spring constant is lowered.