KR20050108104A - Joint structure of wiper blade - Google Patents

Abstract

The present invention relates to a joint structure of a wiper blade which improves the structure of the joint connecting the main link and the middle link of the wiper blade, reduces the number of parts, is easy to assemble, and prevents mutual fluctuation. The purpose of the present invention is to provide a joint structure of the wiper blade, which reduces the number of parts of the wiper blade, facilitates assembly, and reduces the process required for production, thereby increasing productivity. The joint structure of the wiper blade according to the present invention for achieving the above object is a wiper blade in which the main link and the middle link is coupled via a joint, through-holes are formed on both sides of the main body of the joint, the through hole In the central portion of the outer pin protruding outward of the joint body and the inner pin protruding inward of the joint is located, the inner and outer pins are connected by the joint body and the connecting portion.

Description

Joint structure of wiper blades {JOINT STRUCTURE OF WIPER BLADE}

The present invention relates to a joint structure of a wiper blade for wiping the glass surface of a vehicle, and more particularly, to improve the structure of the joint connecting the main link and the middle link of the wiper blade, the number of parts is reduced, easy to assemble, and mutual It relates to a joint structure of the wiper blade is prevented from swinging.

In general, when a glass surface is contaminated due to dust or weather conditions in the air, the vision is blurred, which hinders safe driving. Thus, a wiper device is provided to clean the glass surface to secure a watch for a driver's safe driving.

FIG. 8 is a perspective view of a vehicle equipped with a general wiper blade, and FIG. 9 is an exploded perspective view illustrating a joint by disassembling a conventional wiper blade.

As shown in FIGS. 8 and 9, the conventional wiper device includes a wiper arm 105 installed at one side of the vehicle body 100 and rotated left and right by a wiper motor (not shown), and the wiper arm ( And a wiper blade 110 equipped with a wiper strip 120 attached to the glass surface to wipe the glass surface.

The wiper blade 110 is coupled to the wiper arm 105 is rotated at a predetermined angle in accordance with the drive of the wiper motor. To this end, the wiper blade 110 is provided with a main link 112 coupled to the wiper arm 105, and the main link 112 includes a plurality of wipers for uniformly transferring the pressure of the wiper arm 105. The middle link 114 is coupled to the pin 115, and a plurality of sublinks 116 for connecting with the wiper strip 120 are coupled to the middle link 114 with the pin 117. In addition, clips 118 are formed at both ends of the sublink 116 to be coupled to the coupling groove 124 formed in the wiper strip 120.

On the other hand, the wiper blade 110 has a "c" shaped joint 130 for uniformly transferring the pressure of the wiper arm 105 by reducing the friction between the main link 112 and the middle link 114. Is installed. To this end, pin holes 112a, 114a, and 130a are formed at both sides of the main link 112, the middle link 114, and the joint 130, respectively, and penetrate through the respective pin holes 112a, 114a, and 130a. The pin 115 is inserted.

However, the joint 130 of the wiper blade according to the prior art is a structure that is inserted between the main link 112 and the middle link 114 and then fixed by the pin 115, due to the increase in the number of parts The production cost is increased, and when assembling these parts, six pin holes 112a, 114a, and 130a formed in the main link 112, the middle link 114, and the joint 130 must be matched and then inserted. Not only this complexity but also the assembly process time is increased, there is a problem that the productivity of the product is reduced. In addition, the conventional joint 130 is a structure that moves relative to the main link 112 as well as the middle link 114 during the operation of the wiper, the noise is generated during operation.

Due to the relative fluctuations between the main link 112 and the joint 130 and between the joint 130 and the middle link 114, the driving force of the wiper arm 105 may not be accurately transmitted to the wiper strip 120. Bars that are not easily wiped on the glass surface is a factor that interferes with the front view, which leads to difficulty in safe driving, and the pins 115 may be caused by continuous fluctuations generated between the main link 112 and the joint 130. This easily deformed problem occurs because there is a gap formed between the main link 112 and the joint 130, there is a problem that foreign matter is stuck or water in the winter into the freezing does not work properly. In addition, since the coating on the inner side of the main link 112 is peeled off due to the friction of the relative movement of the main link 112 and the joint 130, the life of the product is shortened and the appearance is reduced.

An object of the present invention is to solve the above-mentioned problems of the prior art, to reduce the number of parts of the wiper blade by integrally forming the pins in the joint, easy to assemble and reduce the process required for production productivity This is to provide a joint structure of the increased wiper blades.

In addition, another object of the present invention is to cause the main link and the joint to be constrained mutually, no fluctuations occur, the generation of noise is reduced, the inflow of rainwater or foreign matter is reduced not only increases the life of the product but also the generation of rust This is to provide a joint structure of the wiper blade to be reduced.

The joint structure of the wiper blade according to the present invention for achieving the above object is an outer pin which protrudes outward from both side wall surface of the "c" shaped joint and coupled with the pin hole formed in the main link, and the pin hole formed in the middle link and Internal pins protruding into both side walls to be joined are located, which are connected to the joint body by a plurality of connections. In addition, a rib connecting the joint body and the outer pin to the outer pin side of the connection part is integrally formed with the connection part. In some cases, ribs may replace the connections.

On the other hand, the pin hole formed in the main link is formed in the shape of the outer pin and the rib of the joint. The connection part may be an elastic material. In addition, the rib may include a first inclined portion formed in a direction in which the joint is coupled to the main link. On the other hand, the inner pin may include a second inclined portion formed in the direction to be inserted into the middle link. The cross-sectional shape of the outer pin may include a circular or polygonal shape, the cross-sectional shape of the outer pin and the rib may be the same as the shape of the pin hole formed in the main link. In addition, the middle link may have a protrusion supported by the main link, and an opening through which the protrusion of the middle link penetrates may be formed on an upper surface of the joint.

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

1 and 2 are a perspective view and a front view of the wiper blade according to the present invention, Figure 3 is an exploded perspective view showing the joint by disassembling the wiper blade according to the present invention, Figure 4 is a cross-sectional view of the line A-A of FIG.

The wiper blade according to the present invention, as shown in FIGS. 1 to 4, is coupled to the wiper arm 5 to be closely moved on the glass surface and used to remove dirt or water on the glass surface. The wiper blade 10 is installed at one side of the vehicle body, and is installed at the end of the wiper arm 5 which is turned left and right at a predetermined angle by a wiper motor (not shown).

The wiper blade 10 includes a main link 12 hinged to the wiper arm 5, and the main link 12 includes a plurality of middle links 14 around pins 15. It is coupled by a joint (30) having a.

5 and 6 and 6 are cross-sectional views taken along line BB of the wiper blade according to the present invention, the joint 30 is formed in a "c" shape to form the main link. It is disposed between 12 and the middle link (14). Pin holes 12a and 14a are formed on both sidewalls of the main link 12 and the middle link 14, and both side wall surfaces of the joint 30 protrude outwards to pinholes 12a of the main link. An outer pin 15a to be coupled and an inner pin 15b to be coupled to the pin hole 14a of the middle link 14 are formed. The outer pin 15a and the inner pin 15b are integrally connected to the main body of the joint 30 by a plurality of connecting parts 32 and are positioned at the central portion 30a of the joint 30.

Here, the connecting portion 32 is preferably made of an elastic material so that the joint 30 can be combined with the main link 12 and the middle link 14. The connection part 32 is the pin 15 of the main link 12 or the middle link 14 when the joint 15 and the main link 12 or the middle link 14 are coupled to each other. Elastically moved inward or outward so that it can be inserted into 12a, 14a).

In the exemplary embodiment of the present invention, the connection part 32 includes the first connection part 33 and the second connection part 34 formed on the upper and lower portions of the joint 30 and the inner and outer pins 16 and 15. Is done. In addition, a rib 36 connecting the joint 30 main body and the external pin 15a to the outer pin 15a of the first connector 33 is integrally formed with the first connector. In addition, the pin hole 12a formed in the main link 12 has a recess 12b corresponding to the rib 36 so that the outer pin 15a including the rib 36 can be inserted therein. .

On the other hand, the rib 36, the first inclined downward in the direction coupled with the main link 12 so that the outer pin (5) is guided and inserted into both side wall portions of the main link 12 on one side of the upper portion; The inclined portion is formed. In addition, a second inclined portion 38 inclined downward in a direction in which the middle link 14 is coupled to be inserted into the lower side of the inner pin 15b.

That is, when the pin 15 of the joint 30 is coupled to the main link 12, the first inclined portion 37 of the connection member contacts the lower and inner surfaces of the main link 12 and moves inwardly. After being guided, it is inserted into the pin hole 12a of the main link 12. At this time, the rib 36 is inserted into the recess 12b of the main link 12.

On the other hand, when the pin 15 of the joint 30 is engaged with the middle link 14, the second inclined portion 38 inside the pin 15 contacts the upper and outer surfaces of the middle link 14. And is guided outward and then inserted into the pin hole 14a of the middle link 14.

In the embodiment of the present invention, the connecting portion 32 is installed on the upper and lower portions of the pin 15, but is not limited to the specification and drawings of the present invention, the position and number of the formation for improving the quality of the product Of course, it can be changed. For example, the connecting portion 32 may be formed in three places at equal intervals in the space between the center portion 30a of the joint and the pin 15. In addition, the connection part 32 may be formed at the left and right sides of the pin 15 so as to be inserted into the main link 12 or the middle link 14 in the front and rear directions.

In addition, the cross-sectional shape of the outer pin (15a) in the embodiment of the present invention is formed in a circular shape, in order to more effectively block the relative movement of the main link 12 and the joint 30 includes a triangle, square or pentagon. It is also possible to form a polygon.

In addition, the middle link 14 is formed with a protrusion 19 supported on the bottom surface of the main link 12 to support the load of the main link 12 pressed by the wiper arm 5, An opening 39 penetrating the protrusion 19 is formed on an upper surface of the joint 30. That is, the protrusion 19 is supported on the bottom surface of the main link 2 so that both side walls of the main link 12 are guided to the first inclined portion 37 when the wiper arm 5 is pressed. It prevents from being separated from the outer pin 15a of the joint.

The above-described protrusion 19 is formed convexly upward after a portion of the upper surface of the middle link 14 is cut off. Here, the protrusion 19 is preferably formed to have a size corresponding to the opening 39 so as to prevent the shaking of the joint 30.

As described above, the joint structure of the wiper blade according to the present invention has been described with reference to the illustrated drawings, but the present invention is not limited to the embodiments and drawings described above, and the present invention belongs to the claims. Of course, various modifications and variations can be made by those skilled in the art.

In the joint structure of the wiper blade according to the present invention configured as described above, since the pins fixing the main link and the middle link are integrally formed in the joint body, the number of parts is reduced and the production cost is reduced. Since the assembly by the fitting method is easy to assemble, the assembly process time is reduced, and the productivity of the product is greatly improved.

In addition, the joint has a structure in which a pin hole having the same shape as that of the pin is formed in the main link and the pin is inserted into the pin hole and fixed, and the relative movement between the main link and the joint does not occur. The occurrence of noise is reduced during operation. In addition, since the relative movement between the main link of the joint does not occur, the driving force of the different wiper arm is accurately transmitted to the wiper strip, thereby improving adhesion to the glass surface, thereby improving the cleanliness of the glass surface, and easily securing the front view. Become.

In addition, water does not flow between the main link and the joint so that foreign matter does not flow into the place, and the coupling part is prevented from freezing in cold winter weather, so that the wiper is more smoothly operated.

In addition, since the relative motion between the joint and the main link does not occur, peeling of the coating due to friction does not occur, and rust does not occur due to this, so that external aesthetics are always kept clean and the durability of the product is improved. do.

In addition, the middle link is provided with a protrusion supporting a load when the main link is pressed, thereby preventing the joint from being separated from the main link or the middle link.

As such, the joint structure of the wiper blade according to the present invention increases the service life of the wiper blade due to the simplicity of the configuration and the accuracy of the operation, as well as improves the productivity of the product and contributes to safe operation.

1 and 2 are a perspective view and a front view of the wiper blade according to the present invention.

Figure 3 is an exploded perspective view showing the joint by disassembling the wiper blade according to the present invention.

4 is a cross-sectional view taken along the line A-A of FIG.

5 and 6 are a perspective view and a front view showing a joint of the wiper blade according to the present invention.

7 is a cross-sectional view taken along the line B-B in FIG. 6.

8 is a perspective view of a vehicle equipped with a general wiper blade.

Figure 9 is an exploded perspective view showing a joint by disassembling a conventional wiper blade.

<Explanation of symbols for the main parts of the drawings>

5: wiper arm 10: wiper blade

12: main link 12a, 14a: pinhole

12b: groove 14: middle link

15a: external pin 15b: internal pin

16: sublink 18: clip

19: protrusion 20: wiper strip

21: rail spring 22: rail groove

24: coupling groove 30: joint

32: connecting portion 33: first connecting portion

34: second connection portion 36: rib

37: the first inclined portion 38: the second inclined portion

39: opening

Claims (7)

In the wiper blade that the main link and the middle link are coupled via a joint, Through-holes are formed on both side walls of the body of the joint, In the central portion of the through hole is located an outer pin protruding outward of the joint body and an inner pin protruding inward of the joint, The inner and outer pins are a joint structure of the wiper blade, characterized in that connected by the joint body and the connecting portion. The joint structure of the wiper blade according to claim 1, wherein a rib connecting the joint body and the external pin is integrally formed with the connection part on the outer pin side of the connection part. 3. The joint structure of a wiper blade according to claim 2, wherein the rib includes a first inclined portion inclined downward toward the main link. The wiper blade joint structure according to any one of claims 1 to 3, wherein the inner pin includes a second inclined portion that is inclined downward toward the middle link. The joint structure of the wiper blade according to any one of claims 1 to 3, wherein the cross-sectional shape of the outer pin includes a circular or polygonal cross-sectional shape. 4. The joint structure of a wiper blade according to any one of claims 1 to 3, wherein the cross-sectional shape of the outer pin and the rib of the joint is the same as the shape of the pin hole formed in the main link. The wiper blade according to any one of claims 1 to 3, wherein the middle link is provided with a protrusion supported by the main link, and an upper surface of the joint has an opening through which the protrusion of the middle link is formed. Joint structure.