KR20020068567A - Structure of wiper arm in wiper device for an automobile - Google Patents

Abstract

PURPOSE: A wiper arm structure of a wiper unit for a vehicle is provided to reduce the number of parts for coupling a wiper blade, the time for assembling, and the length of the process, and to reduce manufacturing expenses by shortening the length of a wiper arm. CONSTITUTION: A wiper arm(11) and a curved wiper blade structure(12) are directly connected by forming a connecting structure(13) at mutual opposite ends. A wiper arm structure is equipped with a wiper arm shortened to the extent of the half-length of the wiper blade structure. Leaf springs supporting a wiper rubber(14) is inserted to regularly maintain push pressure of the wiper rubber to the wind shield surface. A band spring(17) inserted to prevent the wiper rubber from bending has wider width than a former wiper blade structure and has thickness from the connected area toward the outside. Therefore, the weight of the equipment is reduced and the clearance and noise of the rubber is reduced. The manufacturing cost is reduced with using a motor having low torque.

Description

WIPER ARM STRUCTURE OF AUTO WIPER DEVICE {STRUCTURE OF WIPER ARM IN WIPER DEVICE FOR AN AUTOMOBILE}

The present invention forms a connecting structure at the opposite ends of the wiper blade structure and the wiper arm to connect directly integrally, and at the same time the leaf spring and thickness for maintaining a constant pressing pressure of the wiper rubber against the windshield surface when the vehicle is mounted The present invention relates to a wiper arm structure consisting of a blade structure that is composed of a band spring inserted with an adjustable width to wipe off foreign matter or rainwater on the windshield surface.

In general, a windshield is fitted to the front of the vehicle to prevent inflow of wind or rainwater from the front while driving. When dust or dirt accumulates on the surface of the windshield, it is difficult to secure the view in front of the windshield. In particular, when driving in snow or rainy areas, it is necessary to remove the moisture on the surface of the windshield quickly. Can be. To this end, the vehicle is provided with a wiper device, which can remove dust and rain water on the surface of the windshield.

In the general configuration of the wiper system, the wiper motor, the wiper link actuated by the wiper motor, the wiper arm rotated by the wiper link within an angle range, and the center part are fixed to the end of the wiper arm. When the wiper arm is moved, the wiper blade is wiped by wiping the surface of the windshield while moving within a range of angles along the surface of the windshield, thereby removing various dusts and foreign matters on the surface. One such role is the vehicle wiper blade disclosed in US Pat. No. 6,026,537.

1 is a front view showing a general wiper device. As shown here, the wiper blade 2 is rotatably fixed to the wiper arm 1 by the hinge 7. To this end, the wiper blade (2) is provided with a main bracket (3) hinged to the wiper arm (1), the intermediate bracket (4) is coupled to the main bracket (3) by a hinge (6), The rubber bracket 5 is coupled to the intermediate bracket 4 by a hinge. The elastic rubber 10 is fitted to the clips 8 and 9 at both ends of the bracket.

In the conventional wiper device having such a configuration, since the center portion of the wiper blade is rotatably coupled to the wiper arm by the clip, the arm is longer by half the length of the wiper blade so that the moment is raised, so that there is play in the clip portion. At the same time, noise generated by friction with the windshield surface is generated, and in order to compensate for this problem, a motor with high torque should be selected when selecting a motor. Follow. In addition, since a clip and a pin for fixing the clip are required, the number of parts is high, and another additional assembly process and assembly time are required to combine them, causing a cost increase.

An object of the present invention for solving the above problems is to connect the mutually opposite ends of the wiper arm and the wiper blade structure directly integrally through the connecting structure to reduce the weight of the wiper arm to select a low torque motor of the wiper arm To provide a structure.

Another object of the present invention is to reduce the impact transmitted during the wiper operation by configuring the wiper rubber constituting the integral curved wiper blade structure to be supported by a spring in order to maintain a constant pressing pressure on the windshield surface An object of the present invention is to provide an integrated wiper blade structure capable of preventing noise and wiping defects from occurring.

1 is a front view showing a typical wiper device,

2 is a front view showing an integrated wiper arm structure according to the present invention;

3 is an enlarged perspective view of the connection structure shown in FIG. 2;

4A is a cross-sectional view of the curved unitary wiper blade structure shown in FIG. 2;

4B is a side view of the curved unitary wiper blade structure shown in FIG. 4A;

♠ Explanation of the symbols for the main parts of the drawings ♠

11: wiper arm 12: wiper blade structure

13 connection structure 14 wiper rubber

The present invention for achieving the above object is a drive arm actuated by a motor, a pivot shaft which is automatically coupled to the drive arm by opening a connecting link, a wiper arm coupled to the threaded portion of the pivot shaft, and a rubber connected thereto. In the vehicle wiper device comprising a wiper blade for wiping off foreign matter or rain water on the surface of the windshield through a wiper arm, the wiper arm forming a connecting structure that can be directly connected to the connecting structure formed at the opposite side of the wiper blade structure. And an integrally curved type that inserts by adjusting the thickness of the leaf spring for supporting the wiper rubber and the strip spring for preventing the warping of the wiper rubber to maintain the pressing pressure of the wiper rubber against the windshield surface when the vehicle is mounted. It is characterized by consisting of a wiper blade structure .

DETAILED DESCRIPTION Hereinafter, a wiper arm and an integrated wiper blade according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

Figure 2 is a front view showing the connection state of the wiper arm and the blade structure according to the invention, Figure 3 is an enlarged perspective view of the connecting structure shown in Figure 2, Figure 4a is a unitary curved wiper shown in Figure 2 It is sectional drawing which shows a blade structure, FIG. 4B is a side view of the integrated curved wiper blade structure shown in FIG. 4A, and has shown the same code | symbol about the same component of each figure.

Typically, in the wiper device for a vehicle, the driving force of the wiper motor is transmitted to the wiper arm through the wiper link, and the power transferred to the wiper arm rotates the wiper blade at a predetermined angle to remove dust or foreign matter from the surface of the windshield. Will be removed.

In the vehicle wiper device having such a configuration, in order to prevent noise and wiping defects caused by the clearance of the conventional clip in the preferred embodiment of the present invention integrally opposite ends of the wiper arm and the wiper blade structure by the connecting structure. It consisted of. That is, as shown in FIG. 2, the connecting structure 13 is formed at the mutually opposite ends of the wiper blade structure 12 and the wiper arm 11 which are curved so that a constant pressing pressure is applied to the windshield surface when the vehicle is mounted. By removing the conventional clip or pin by integrally forming to form a simple structure, and simplified the structure, in particular, by directly connecting to one end of the wiper blade, the length of the wiper arm 11 is shorter than the conventional wiper blade structure length by half Shock and noise are reduced during rotation, and relatively low torque motors can be applied.

As shown in FIG. 3, the wiper arm structure is composed of an arm 11 and a wiper blade structure 12. The arm 11 is a first connecting member 15 of the type of a shaft, one side of which is not shown in the drawing is connected to the pivot shaft and the other side is connected to the blade structure 12, the arm 11 of the blade structure 12 The opposite side end is composed of a second type of connector 16 of the mail type which is engaged with the first connector 15.

The first and second connecting bodies 15 and 16 are composed of one connecting structure 13, each of which is composed of a socket type and a head portion inserted into the socket. In other words, the first connecting member 15 extends integrally from the body of the arm 11, and coupling holes 17 are formed at both sides at predetermined positions as shown in the drawing. The second connecting body 16 extends integrally from the blade structure 12 and the head portion of the second connecting body 16 is inserted into the first connecting body 15 and the elastic hook portion 18 with respect to the coupling hole. To hang. Therefore, the arm 11 and the blade structure 12 are simply integrally combined.

Here, the first and second connecting bodies 15 and 16 of the connecting structure 13 may be of any configuration that integrally couples the arm 11 and the blade structure 12.

The wiper blade structure 12 is composed of a wiper rubber 14 and a bracket 19, as shown in Figure 4a. The wiper rubber 14 is similar in construction to the conventional one, but the rubber belt spring 21 has an extension (not shown) extending to both sides slightly wider than the width of the rubber so as to be applied to the present invention. It is provided with projections 21 and 21 'formed thicker toward the front and extending from the end of the engaging side for constant dispersion of the pressing pressure.

The bracket 19 is composed of a frame having a rectangular cavity, and the predetermined length of the extension portion to which the second connecting member 16 is coupled is received, and one end thereof is integrally formed so that its lower end surrounds the belt spring 21. Combined. The space between the bracket 19 and the wiper rubber 14 becomes wider toward the opposite side of the coupling end, and the uneven plate springs 22 and 23 capable of supporting the wiper rubber 14 downward in the space. Fixing pins 22 ′ and 23 ′ are formed to accommodate and fix the leaf springs 22 and 23 so as to be movable.

As shown in FIG. 4B, the side of the bracket 19 has a protrusion 21 of the belt spring 21 on the opposite side of the wiper blade structure in which the connecting structure is formed so as to enable the up and down flow of the supported wiper rubber 14. Two slits 22 and 22 'are formed to allow insertion of 21'). The protrusions 21 and 21 'of the belt spring inserted into the slit are supported by the leaf springs 22 and 23 when the rubber contacts the windshield surface when the wiper blade structure 12 is mounted, or the pressing pressure is constant when the wiper is rotated. Up and down movement of the wiper rubber 14 is enabled to maintain

In addition, the present invention is described above to support the wiper rubber by applying a plate spring of a constant shape, but can be applied by changing the shape of the plate spring, replacing the plate spring with a ring spring to support the wiper rubber Can play a role.

In the preferred embodiment of the present invention described so far, the wiper arm and the wiper blade structure are integrally connected by connecting structures formed at opposite ends, and the wiper blade structure is supported by a spring. Those skilled in the art will appreciate that various modifications, changes, additions, and the like are possible without departing from the spirit of the present invention.

According to the present invention described above, the wiper arm and the wiper blade structure is directly integrally connected by the connecting structure formed at the opposite ends, and the leaf spring which can support the wiper rubber while forming the curved wiper blade structure By assembling the belt spring with adjustable thickness and width, it is possible to reduce the number of parts required for the wiper blade assembly, reduce the assembly time and the number of processes, and use a low torque motor by reducing the weight of the wiper device. By lowering and improving the wiping performance, noise and wiping defects generated in the conventional wiper blade are reduced, so that a quiet atmosphere can be maintained at all times and a clean front view can be obtained.

Claims (4)

Wipe off any foreign matter or rain on the windshield surface through the drive arm operated by the wiper motor, the pivot shaft operatively coupled to the drive arm via the connecting link, and the wiper arm and wiper rubber coupled to the threaded portion of the pivot shaft. In the vehicle wiper device comprising a wiper blade, An integrated wiper arm structure, characterized in that the wiper arm (11) and the curved wiper blade structure (12) are connected directly to each other by forming a connecting structure (13). The method of claim 1, The wiper arm 11 and the curved wiper blade structure 12 form a connecting structure 13 at opposite ends to be directly connected to each other so that the wiper arm 12 is shorter by half the length of the wiper blade structure than the conventional device. A wiper arm structure, comprising: The method of claim 1, The wiper arm 11 and the curved wiper blade structure 12 are connected directly to each other by forming a connecting structure 13 at opposite ends, so as to maintain a constant pressing pressure of the wiper rubber against the windshield surface when the vehicle is mounted. Wiper blade structure, characterized in that the assembly by inserting the leaf spring (22, 23) capable of supporting the wiper rubber. The method of claim 1 The wiper arm 11 and the curved wiper blade structure 12 are directly connected to each other by forming a connecting structure 13 at opposite ends, and the belt spring 17 inserted to prevent bending of the wiper rubber is wider than before. Wiper blade structure, characterized in that the wider and assembling thicker toward the outside from the connecting portion.