JPS5851090Y2 - wiper arm - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a wiper mounted on a vehicle such as an automobile, and in particular provides a wiper arm for improving wiping performance.

First, the structure of a conventional general wiper arm will be explained based on FIG.

Conventionally, as shown in FIG.
The main body is assembled by positioning the spring C at the tip of the arm a' with a protrusion d protruding from the arm a' and tightening it e.

The main body is formed into a concave shape, and the opposing wall b'*b
” has a coaxial hole into which the pin t provided on the wiper blade f is inserted.

h' passes through.

On the other hand, the pin g provided on the wiper grade f has a shoulder portion 1.
ei' and a reduced diameter section j.

The connection between the fiber blade f and the wiper arm a is provided on the wiper blade f, and the rareta pin g is connected to the wiper arm 1.
This is achieved by inserting it into the through holes h and h'.

That is, the spring C, which is fixed to the arm a' together with the main body by caulking e, is attached to the shoulder part it' of the pin g.
It is fitted into and coupled to the reduced diameter portion j formed by.

The wiper blade f configured in this way can freely rotate between itself and the wiper arm a, but does not come off, and has a structure that follows the curved surface of the glass.

Unfortunately, when removing wiper grade F, use spring C.
By utilizing the elasticity of the pin g, it can be removed by spreading it outward from the shoulder portion i*j' of the pin g.

By the way, in order to improve the wiper arm's wiping performance, the wiper arm's arm suppression was increased to prevent the wiper blade from lifting up during high-speed driving. When the wiper blade is under the most load (generally referred to as semi-dry), a chattering phenomenon occurs due to changes in the coefficient of friction between the sliding part of the blade rubber and the glass surface, resulting in poor visibility due to unwiped parts, and in severe cases. They are often accompanied by noise, which can irritate drivers' nerves and even lead to traffic accidents.

Furthermore, the wiping performance and the chatter phenomenon during high-speed driving are in a contradictory relationship with each other, and this cannot be solved by arm pressing of the wiper arm.

The purpose of the present invention is to effectively improve the wiping performance, which is a drawback of the conventional wiper, and to provide a wiper arm that has a simple structure and does not obstruct visibility.

This project experimentally confirmed the means to prevent floating and chatter at high speeds, which are the shortcomings of the conventional method, and to solve the problem, we selected the cross-sectional shape of the wiper arm and improved its rigidity, as well as the wiper blade and the wiper arm. This method has been simplified by changing the cross-sectional shape.

Examples of the present invention will be described below.

Referring to FIGS. 1, 3 to 5, the wiper shaft 1 swings through a link mechanism (not shown) that converts the rotational movement of a motor (not shown) into a swinging movement.

The wiper arm 2 is connected to the wiper shaft 1 on one side and is made up of a retainer 3 and an arm 4 with a circular cross section fixed to each other, and the other side is bent at a substantially right angle at the tip, and a pin is attached to the tip 4a. Hole 5 into which the base is inserted is open.

A slit 6 is opened in the circumferential direction in the middle of the pattern hole 5, and the tongue portion 8 of the clip 7, which is narrower than the width of the slit 6, is inserted into the slit 6 and engaged, as shown in FIGS. 3 and 4. One end of the arm 4 is fixed to the outer periphery of an arm 4 having a circular cross section.

The clip 7 is made of an elastic body, and by pushing it outside the circumference of the hole 50, the pin base can be inserted.

Next, when the tongue part 8 of the clip pin 7 is released, the tongue part 8 is attached to the pin J.
It fits into the reduced diameter part j of No. 4 and catches on the shoulder part 1' of the pin, completing the connection with the wiper blade f.

Furthermore, the method of attaching and removing the wiper arm z and wiper blade f is the same as the conventional one and is compatible.

Since automobiles and the like are generally produced in large quantities, it is well known that wiper blades f, which are consumable items, are compatible.

The wiper arm 2 constructed as described above is made of a pipe with a circular cross section, so it has high rigidity and is less likely to cause chatter, and because of the circular cross section, lift is less likely to be generated at high speeds.

Furthermore, since the position of the wiper arm is set below the blade, visibility is not obstructed.The connecting part between the wiper arm 2 and the wiper blade f, especially the wiper arm 2, is connected to the clip 7.
Since the structure is simply fixed, the structure is simple and inexpensive.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the wiper blade and the wiper arm combined, Fig. 2 is an explanatory view of the conventional embodiment d showing the portion of the wiper blade and wiper arm connected to each other, and Fig. 3 is the wiper arm of the present invention. A perspective view showing the part that connects with the wiper blade, FIG.
5 is a diagram in which the wiper blade and the wiper arm of FIGS. 3 and 4 are combined, and the wiper arm is cut along the line BB in FIG. 4. 1...Wiper shaft, 2...Wiper arm, 3...Retainer 4...Arm, 4a...Tip, 5... ...hole, 6-
-Slit, 7...Clip, 8...
・Tongue, a...Wiper arm al...
...Arm, b...Body, C...
Spring, d... protrusion, e... caulking,
b', b''...Wall, f...Wiper blade, g...Pin, h, h'...Hole,
l m l'...Shoulder part, j...Reduced diameter part.

Claims (1)

[Scope of utility model registration request] In a wiper arm consisting of a retainer and an arm, a pin provided approximately at the center of the wiper blade is inserted into the tip of the arm, and the arm has a circular cross section, and the tip of the arm has a circular cross section. The arm is bent at a substantially right angle, and a hole is bored in the tip, and a slit communicating with the hole is formed near the tip, and one end is fixed to the outer periphery of the tip of the arm, and the free end is engaged with the slit. 1. A wiper arm comprising: an elastic clip having mating tongues; the clip locks the pin to a distal end of the arm.