KR20020054063A - Blade assembly of wiper for car - Google Patents

Abstract

PURPOSE: A wiper blade assembly of a vehicle is provided to prevent the chattering by making a lower blade of a windshield glass stuck to a windshield. CONSTITUTION: A fitting(10) and a leaf spring(11) are installed in the connected part of an upper wiper frame(6) and a lower wiper frame(7). The degree of the load applied to both ends of the lower wiper frame is changed. The leaf spring applies specific elastic restorative force to the lower wiper frame. Thus, different loads are applied to respective ends of a blade of the lower wiper frame. Therefore, the blade is strongly stuck to a windshield glass.

Description

Blade assembly of wiper for car

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade assembly of a vehicle wiper, and more particularly, a lower blade of a windshield glass by applying a predetermined elastic force to a lowermost frame located at a lower end of the windshield glass among the wiper frames connecting the blade to the wiper arm. It relates to a blade assembly of a vehicle wiper, which makes it possible to be in close contact with the windshield to prevent chattering.

In general, the vehicle wiper removes the moisture of the glass when the windshield glass is wet, so that the driver's vision can be secured.

These wipers 1 are provided at both sides of the windshield glass 2 of the vehicle, as schematically shown in FIG. 1, and each wiper 1 is at the bottom center and one end of the windshield glass 2. It is mounted to be rotatable.

The wiper 1 is composed of a wiper arm 3 and a blade assembly 4 connected to the wiper arm 3 to rotate by receiving rotational driving force from a wiper motor (not shown), and the blade assembly 4 ) Generally has a structure in which a plurality of wiper frames are combined.

The wiper frame includes one top wiper frame having a central portion connected to the wiper arm 3, two central wiper frames having a central portion connected to both ends of the top wiper frame, and four central portions connected to both ends of the central wiper frame. It is generally composed of a lowermost wiper frame, and the blade is supported by the lowermost wiper frame.

Then, the blade 5 supported by the blade assembly 4 should be kept in close contact with the windshield glass 2 with an appropriate force, and the windshield glass is inclined at a predetermined angle θ as shown in FIG. 2A. It is effective in removing moisture from (2).

By the way, the conventional blade assembly (4) is structurally designed so that the blades can receive the same load over the entire length, while the windshield glass (2) has a sharp radius of curvature compared to the other portion (A) of the lower edge of both sides Since there is a change, in the portion A, the blade 5 is not in close contact with the windshield glass 2 as shown in Fig. 2B, so that a chattering phenomenon occurs.

That is, the conventional blade assembly 4 has a problem of causing noise due to chattering as well as not properly removing water from the lower edge portion of the windshield glass.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object thereof is to provide a wiper for a vehicle, which effectively prevents chattering by maintaining a predetermined contact pressure of the blades on both bottom edges of the windshield glass. To provide a blade assembly.

1 is a schematic diagram showing a general wiper mounting configuration;

2A is a schematic diagram showing a preferred operating state of the blade;

Fig. 2B is a schematic diagram showing a blade state when a chattering phenomenon occurs;

3 is a conventional configuration of a wiper frame engaging state constituting the blade assembly of the vehicle wiper;

4 is a configuration diagram of the present invention for the wiper frame coupled state constituting the blade assembly of the vehicle wiper;

5 is an explanatory view showing a load distribution applied to each wiper frame of the blade assembly according to the present invention; to be.

※ Explanation of symbols about main part of drawing ※

1: wiper 2: windshield glass

3: wiper arm 4: blade assembly

5: blade 6, 7: wiper frame

10: fitting body 11: leaf spring

12: support F: load

θ: angle

As a technical configuration for achieving the above object, the present invention has a multi-stage wiper frame mounted on the end of the wiper arm mounted on the vehicle body so as to be rotatable, and coupled to the wiper arm, the lower wiper of the multi-stage wiper frame In the blade assembly of the vehicle wiper, which is adapted to support the blade by the frame, the lower wiper frame is connected to the wiper frame located at the upper end of the windshield so that a large load is applied to the end positioned at the bottom of the windshield. By providing a blade assembly of the vehicle wiper characterized in that.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 shows a conventional configuration for the wiper frame coupled state constituting the blade assembly of the vehicle wiper, Figure 4 shows the configuration of the present invention.

Upper and lower ends of the upper wiper frame 6 are connected to the upper center of the lower wiper frame 7, and the connection parts of the wiper frames 6 and 7 include plastic injection moldings for preventing play and smooth operation. Fitted body is fitted and fixed.

The conventional fitting body 8 is fitted to the connecting portion of the wiper frames 6 and 7 as shown in Fig. 3, with the lower wiper frame 7 slightly up and down relative to the upper wiper frame 6. The clearance between the front and rear sides of the ground is prevented while the clearance of the ground is enabled.

That is, the function of the conventional fitting body 8 is only to keep the lower wiper frame 7 from swinging in the blade advancing direction.

The present invention is characterized by changing the magnitude of the load received at both ends of the lower wiper frame 7 by mounting the leaf spring together with the fitting body at the connection portion between the upper wiper frame 6 and the lower wiper frame 7. This will be described in more detail with reference to FIG. 4.

The fitting body 10 of the present invention may have the same shape as the conventional fitting body 8 or may have a different shape.

For example, it is good also as two components which are the same as the shape of the both edge part with respect to the longitudinal direction of the conventional fitting body 8, and the center part was cut in the longitudinal direction.

The present invention has a leaf spring 11 having a predetermined shape with the fitting body 10, the leaf spring 11 is formed in a continuous shape along the center of the upper surface of the fitting body 10 One end of the leaf spring 11 is fitted to the end of the upper wiper frame 6 and the other end is fitted to the support 12 formed integrally with the lower wiper frame 7.

In addition, the leaf spring 11 applies a predetermined elastic restoring force to the lower side wiper frame 7, and the direction of the elastic restoring force pushes the right portion of the lower side wiper frame 7 downward as shown in FIG. Direction.

The operation of the present invention having the above configuration will be described.

FIG. 5 shows the distribution load for the blade assembly of the present invention as shown in FIG.

When a load of F is applied to the upper wiper frame 6, the lower wiper frame 7 coupled to both ends of the upper wiper frame 6 is loaded with ½ F, respectively.

And, both ends of the lower side wiper frame 7 is connected to the upper end of the blade 5, the upper side of the wiper frame that is a portion that is not fitted to the fitting body 10 and the leaf spring 11 of the present invention ( Both ends of 7) are each loaded with ¼ F, while different loads are applied to both ends of the lower wiper frame 7, which is a portion on which the fitting body 10 and the leaf spring 11 of the present invention are mounted.

That is, different loads are applied to both ends of the lower side wiper frame 7 because the elastic restoring force by the leaf spring 11 affects the lower side wiper frame 7.

Then, by appropriately applying the elastic restoring force of the leaf spring 11, the load can be determined. In FIG. 5, it is understood that the load of ⅜F is applied to the end of the blade 5 and the load of ⅛F is applied to the other portion. Can be.

This makes it possible to prevent the phenomenon such as chattering by bringing the blades 5 responsible for both lower end portions A of the windshield glass 2 into close contact with the windshield glass 2 with a larger load than in the prior art. will be.

As described above, according to the blade assembly of the vehicle wiper according to the present invention, the blade wiping the windshield glass by increasing the load on the wiper frame that is responsible for both lower end portions of the windshield glass among the lower wiper frames supporting the blades. It has an effect of preventing the chattering phenomenon by close contact with the lower force on both sides.

Claims (3)

It has a multi-stage wiper frame mounted at the end of the wiper arm (3) mounted to the vehicle body so as to be pivotable, and coupled to the wiper arm (3), and among the multi-stage wiper frames, the blade (5) is moved by the lower wiper frame. In a blade assembly of a vehicle wiper adapted to support, The lower wiper frame is a blade assembly of a vehicle wiper, characterized in that connected to the wiper frame located at the top of the upper end so that a large load is applied to the end located on the lower side of the windshield via a plate spring (11). The wiper frame according to claim 1, wherein the leaf spring (11) has one end coupled to the support (12) of the lower wiper frame (7) and the other end is positioned above the lower wiper frame (7). (6) blade assembly of the vehicle wiper, characterized in that coupled to. The lower wiper frame (7) according to claim 1, wherein the leaf spring (11) is fitted to the connection portion of the lower wiper frame (7) and the wiper frame (6) located above the lower wiper frame (7). Blade assembly of the vehicle wiper, characterized in that mounted via the fitting body (10) to prevent play in the left and right directions.