KR100714065B1 - A wipe blade for the vehicle and the manufacturing method thereof - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle wiper blade, and more particularly, unlike a conventional flat blade, which is wider, a plurality of leaf springs having a different curvature and a relatively narrow width are laminated and bonded to form a leaf spring assembly, and the plate Since the spring assembly has a structure in which the protector is directly engaged with the cleaning rubber, the force transmitted to the wiper blades by a plurality of leaf springs with different curvatures is uniformly distributed throughout the blades, thereby maintaining the adhesion of the wiper blades to the vehicle windshield. On the other hand, in the case of a conventional wide blade, a vehicle wiper blade which can solve a phenomenon in which water accumulated on the side of the window after wiping is drawn to the front of the window again to obstruct the driver's view.

The present invention is provided with grooves facing each other in the longitudinal direction of the both sides and the washing rubber to be in close contact with the vehicle windshield, the first plate spring having a unique curvature and the same length as the length of the washing rubber and A plate spring assembly having a length and curvature less than the length and curvature of the first leaf spring, the leaf spring assembly comprising a second leaf spring bonded to an upper surface of the first leaf spring, and extending along a length direction of the cleaning rubber, wherein the plate In a state in which the spring assembly is located on the upper side of the cleaning rubber, the wiper blade for a vehicle comprising a protector for fitting and fixing the washing rubber and the leaf spring assembly simultaneously therein.

According to the present invention, by stacking and bonding a plurality of leaf springs of different lengths and curvatures, a uniform force is transmitted over the entire section of the wiper blade, thereby improving adhesion to the vehicle windshield, resulting in cleaner wiping. Made it possible. In addition, unlike conventional flat blades, by adopting a relatively narrow leaf spring, and fastening the leaf spring and the cleaning rubber directly through the protector, when using a conventional wide flat blade, the driver may be caught by water drag or the like. The problem of obscuring the field of vision was completely solved. On the other hand, by attaching the wiper arm to the bracket, and having a center cover that can seal the opening exposed in the upper direction of the bracket, the problem that the winter snow is frozen in the arm fastening portion in the bracket, in particular.

Wiper, blade, leaf spring, rubber, spoiler

Description

Automotive wiper blades and manufacturing method thereof {A WIPE BLADE FOR THE VEHICLE AND THE MANUFACTURING METHOD THEREOF}

1 is a perspective view of a wiper blade according to a first embodiment of the present invention.

2 is an exploded perspective view of the wiper blade according to the first embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional view viewed from the arrow line A-A of FIG.

FIG. 4 is an enlarged cross-sectional view seen in the direction of the arrow in the B-B line of FIG.

5 is a perspective view showing a leaf spring assembly provided in the wiper blade according to the first embodiment of the present invention.

6 is a perspective view showing the structure of the base and the bracket coupled to the wiper blade according to the first embodiment of the present invention.

7 is a reference perspective view illustrating a structure in which a spoiler is mounted on a bracket according to the first embodiment of the present invention.

8 is a reference perspective view showing a structure in which a center cover is mounted according to the first embodiment of the present invention.

9 is a perspective view of a wiper blade according to a second embodiment of the present invention.

10 is an exploded perspective view of the wiper blade according to the second embodiment of the present invention.

FIG. 11 is a sectional view showing a section along the C-C line in FIG.

12 is a flowchart showing a process of manufacturing a wiper blade according to the first embodiment of the present invention.

Fig. 13 is a flowchart showing a process of manufacturing a wiper blade according to the second embodiment of the present invention.

14 and 15 are reference views showing a conventional flat wiper blade.

Fig. 16 is a graph showing experimental results for a conventional flat wiper blade.

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

100, 300: Wiper blades 10, 110: Cleaning rubber

12, 112: Support 20a, 20b, 120a, 120b: Leaf spring

30, 130: Protector 40, 140: Base

50, 150: Bracket 60, 160: End cap

70, 170a, 170b: Spoiler 80, 180: Center cover

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle wiper blade, and more particularly, unlike a conventional flat blade having a wide width, a leaf spring assembly is manufactured by stacking and joining a plurality of leaf springs having a different curvature and a relatively narrow width. By having the structure of fastening the leaf spring assembly directly to the cleaning rubber by the protector, the force transmitted to the wiper blade by the multiple leaf springs with different curvatures is uniformly distributed throughout the blade so that the adhesion of the wiper blade to the vehicle windshield In the meantime, in the case of a conventional wide blade, a vehicle wiper blade capable of solving a phenomenon in which water accumulated on the side of the window after wiping is dragged to the front of the window again to obstruct the driver's view.

In general, a wiper device for washing down rainwater flowing on the windshield of a vehicle or removing other foreign matter transmits the driving force of the wiper motor installed in the vehicle to the wiper arm via a link mechanism, and the wiper arm is at a predetermined angle. It is configured to reciprocate. In particular, the wiper blade is detachably installed at the tip of the wiper arm to remove rainwater or other foreign matter that flows to the front glass of the vehicle while reciprocating left and right while the cleaning rubber is in close contact with the front glass of the vehicle. It is.

However, in the conventional wiper blade, the lifting speed of the vehicle increases due to the increase in the air flow rate, so that a floating phenomenon occurs from the windshield. In this manner, when the floating phenomenon occurs, the wiper blade is spaced apart from the vehicle windshield so that the wiping performance is deteriorated. Recently, in order to solve such a problem, a number of flat blades equipped with a spoiler having a predetermined curvature and inclined in the driving direction have been disclosed. As described above, the flat blade disclosed in the related art has a relatively good adhesion with the glass window, but also has an excellent effect of preventing injuries (or lifting) while driving. Applicants have studied the flat blades for a long time according to the current trend as described above, and as a result, as shown in FIGS. 14 and 15, the washing rubber 14 for the medium using a leaf spring 20 having a predetermined curvature as a medium. To develop a flat blade that can be combined with the spoiler 10 by a simple operation. The developed flat wiper blade has been filed with Korean Patent Application No. 10-2004-0090171 and registered on July 12, 2000 I have received it.

However, Applicants have found that when the wiper blade length is relatively large in testing and practicing the patented invention, the force transmitted from the wiper arm to the wiper blade is not uniform over the entire length of the wiper, in particular 1 / of the wiper blade. At 6 points and 5/6 points, the adhesion to the vehicle glass is significantly lowered, and as a result, the wiping performance of the 1/6 and 5/6 points is lowered as compared to the center and end portions of the wiper blade. In this regard, Figure 16 shows the experimental results for a flat blade 12 inches long, which shows the pressure distribution over the entire wiper when a certain load is applied to the center of the wiper blade. Referring to Figure 16, it can be seen that the pressure distribution characteristics are high at the center and the distal end of the wiper blade, while very low at the 1/6 and 5/6 points of the wiper. Meanwhile, in the case of the conventional flat blade, for example, as shown in Figs. 14 and 15, a relatively wide leaf spring and spoiler are adopted. Particularly, the rainwater wiped by the wiper blades is flooded with heavy rain. When it is accumulated on the side of the wealth, it has been found that during repeated movements of the wiper device, water collected in the windshield along with the wiper blades is obstructed by the driver's vision. On the other hand, in general, the edge portion of the front seat glass has a relatively large curvature compared to other portions of the front glass, in particular, the adhesion of the wiper blade at the edge of the front seat glass has a problem of lowering the wiping performance.

Applicants have conducted various experiments to solve the problems of the conventional flat blade, and instead of using a conventional wide and single-layer leaf spring, by narrowing the narrow leaf spring in multiple layers When used, the 1/6 and 5/6 points of the wiper blades are complemented by additional laminations of additional leaf springs, which greatly improves adhesion and further reduces the overall width of the wiper blades, thus eliminating conventional water drag. Became aware of. For example, in FIG. 12, the double-layered leaf springs are positioned such that the end portions of the leaf springs are additionally stacked at the 1/6 and 5/6 points of low pressure distribution. The 5/6 point can be complemented.

On the other hand, even in the case of the leaf spring multi-layer structure, there is a concern that the wiper blade may rise (or lift) from the windshield of the vehicle due to air resistance, especially at high speeds. Accordingly, the present applicant has provided openings on both sides of the bracket and fastened spoilers of a predetermined length to the openings, or formed spoilers integrally with the protectors to further improve high-speed traveling performance.

The present invention has been made to solve the above problems, by stacking and bonding a plurality of leaf springs having different lengths and curvatures to transmit a uniform force over the entire section of the wiper blade, adhesion to the vehicle windshield To improve the purpose.

In addition, the present invention adopts a relatively narrow leaf spring, unlike the conventional flat blade, by directly engaging the leaf spring and the cleaning rubber through a protector, water drag phenomenon occurred when using a conventional wide flat blade To solve the problem.

In addition, the present invention, unlike the spoiler structure that has been mounted over the entire blade span of the prior art, by combining a spoiler of a predetermined length in the middle of the wiper blade to solve the phenomenon of high-speed driving to improve the high-speed driving performance for that purpose. do.

On the other hand, the present invention has a center cover that can seal the opening exposed in the upper direction of the bracket after mounting the wiper arm to the bracket, in particular to solve the problem of freezing snow in the arm fastening portion in the bracket, especially in winter For that purpose.

In order to achieve the above object, the first embodiment of the present invention is a wiper blade for a vehicle, in which the grooves facing each other in the longitudinal direction of both sides is formed and the cleaning rubber, which is in close contact with the vehicle windshield, wiping A first leaf spring having a curvature and a length equal to the length of the cleaning rubber and a second leaf spring bonded to an upper surface of the first leaf spring and having a length and curvature smaller than the length and curvature of the first leaf spring. And a leaf spring assembly which extends along the longitudinal direction of the washing rubber, and simultaneously inserts the washing rubber and the leaf spring assembly into the inner side of the leaf spring assembly with the leaf spring assembly positioned on the upper side of the washing rubber. It provides a vehicle wiper blade comprising a protector for coupling and fixing.

According to a preferred embodiment of the present invention, the base is coupled to the middle portion of the protector, the base is provided with a plurality of fastening projections, and a plurality of fastening holes are provided on the lower side, the fastening projections of the base It is configured to further include a bracket coupled to the base by being caulked after being inserted into the fastening of the.

Preferably, it is configured to further include a pair of supports that are fitted in the longitudinal direction to both grooves of the cleaning rubber.

More preferably, the leaf spring assembly comprises a plurality of leaf springs whose length and curvature gradually decrease in the order of stacking in the upward direction.

Preferably, the leaf spring assemblies are bonded to each other by spot welding.

According to an embodiment of the present invention, it is preferable to further include an end cap fitted to both ends of the protector.

Preferably, the bracket is composed of a pair of side walls facing each other, and a pair of connecting portions vertically connected to the pair of side walls on upper sides of both end portions of the side walls.

According to a preferred embodiment of the present invention, spoiler mounting portions are formed on both sides of the bracket by engaging jaws provided on the pair of connecting portions, the pair of side walls, and bottom surfaces of both ends of the pair of side walls, respectively. A pair of spoilers are respectively coupled to the mounting portion.

Preferably, the pair of spoilers are fitted or caulked to both mounting portions of the bracket.

More preferably, the outer circumferential surface of the spoiler has a streamlined structure that is inclined in the direction in which the driving wind blows.

Preferably, the pair of side walls are formed with a plurality of rivet fastening holes at positions opposite to each other.

More preferably, a center cover fastening hole and a center cover fastening groove are formed at positions opposite to each other on the pair of side walls.

According to an embodiment of the present invention, the center cover fastening hole is rotatably coupled to one side hinge portion of the center cover, and the center cover is rotated inward of the receiving portion of the bracket on the basis of the protruding hinge portion, the other side of the center cover. The protrusion is fitted into the center cover fastening groove.

The wiper blade for a vehicle according to the second embodiment of the present invention has washing grooves in which grooves facing each other in the longitudinal direction of both sides are formed and closely adheres to the vehicle windshield, and the wiping blade has an inherent curvature and has a length of the washing rubber. A leaf spring assembly comprising a first leaf spring having a length equal to and a second leaf spring having a length and curvature less than the length and curvature of the first leaf spring and joined to an upper surface of the first leaf spring. A spoiler is integrally formed on one side of each of the divided upper sides, and the washing rubber and the leaf spring assembly are simultaneously inserted therein with the leaf spring assembly positioned on the upper side of the washing rubber. Combining protectors, fitted to the middle portion of the protector is fixed to each other evenly divided protector, A base having a plurality of fastening protrusions on the upper side and a plurality of fastening holes are provided on the lower side, and the fastening protrusions of the base are inserted into the plurality of fastening holes and then cocked to be configured to include a bracket coupled to the base. .

In the method for manufacturing a vehicle wiper blade according to the first embodiment of the present invention, the step of fitting the support into the grooves formed to face each other in the longitudinal direction of both sides of the cleaning rubber, I has a unique curvature and the length of the cleaning rubber In step II, step II, wherein the first leaf spring having the same length as and the second leaf spring having a length and curvature less than the length and curvature of the first leaf spring are joined by spot welding to manufacture a leaf spring assembly. Step III, a plurality of formed on the upper side of the base by fitting and fixing the washing rubber and the leaf spring assembly with a protector in a state in which the leaf spring assembly manufactured by the above is placed on the upper side of the washing rubber prepared in step I. The base and the bracket by caulking and inserting the fastening protrusions of the plurality of fastening holes formed on the lower side of the bracket. The protector prepared by the step III, the assembly of the base and the spoiler to the bracket by the step V, the step of coupling the pair of spoilers respectively to the spoiler mounting formed on both sides of the bracket, step IV and V Coupling VI to a center portion of the bracket, coupling the center cover to a center cover fastening hole formed on a pair of sidewalls of the bracket opposite to each other, and fitting end caps to both ends of the protector. Include.

In the method of manufacturing a vehicle wiper blade according to a second embodiment of the present invention, step I of fitting the support into grooves formed to face each other in the longitudinal direction of both sides of the cleaning rubber, has a unique curvature and the length of the cleaning rubber By a step II, said step II of producing a leaf spring assembly by joining by spot welding a first leaf spring having the same length and a second leaf spring having a length and curvature smaller than the length and curvature of the first leaf spring. Step III, the base is fitted to the protector formed by splicing integrally divided and the spoiler is integrally divided on each upper one side in a state in which the manufactured spring spring assembly is located on the upper side of the washing rubber prepared in step I Caulking to the center of the protector, evenly divided protectors are bonded to each other, the upper side of the base Coupling the base and the bracket to each other by inserting a plurality of fastening protrusions formed in the plurality of fastening holes formed on the lower side of the bracket and then caulking the IV cover to the center cover fastening holes formed on the pair of sidewalls facing each other. Step V of engaging the center cover and step VI of fitting the end caps to both ends of the protector.

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

1st of wiper blade Example

1 is a perspective view of a wiper blade according to a first embodiment of the present invention, Figure 2 is an exploded perspective view of a wiper blade according to a first embodiment of the present invention. FIG. 3 is an enlarged cross-sectional view seen in the direction of an arrow from the line A-A of FIG. 1, and FIG. 4 is an enlarged cross-sectional view seen in the direction of an arrow from the line B-B of FIG. 5 is a perspective view showing a leaf spring assembly provided in the wiper blade according to the first embodiment of the present invention.

1 to 5, the wiper blade for a vehicle according to the first embodiment of the present invention is a cleaning rubber 10 for wiping and wiping directly to the vehicle windshield, a plate in which a plurality of leaf springs are joined The spring assembly 20, the cleaning rubber 10 and the leaf spring assembly 20 is made of a protector 30 for fitting and fixing at the same time. As shown in FIGS. 2 and 3A, the washing rubber 10 is provided with grooves facing each other in the longitudinal direction thereof, and the support 12 is fitted into the groove in the longitudinal direction. Figure 3b shows a case of adopting the structure of the cleaning rubber of another embodiment, the groove and the support that is fitted to the groove is omitted. The leaf spring assembly 20 has a first leaf spring 20a having an inherent curvature and the same length as that of the cleaning rubber as shown in FIGS. 2, 3A, and 3B, and the first leaf spring thereof. It consists of a second leaf spring (20b) having a length and curvature less than the length and curvature of (20a) and bonded to the upper surface of the first leaf spring (20a). Referring to FIG. 5, for example, two leaf springs having different lengths and curvatures may be joined to each other by spot welding at the center thereof to manufacture the leaf spring assembly 20. Preferably, the leaf spring assembly 20 may be composed of a plurality of leaf springs whose length and curvature gradually decrease in the order of stacking in the upward direction. By adopting such a structure, the ends of the leaf springs which are sequentially stacked complement the 1/6 and 5/6 areas where the adhesion to the vehicle windshield is relatively weak, thereby uniformly transmitting the force transmitted from the wiper arm to the entire wiper. Not only increases the adhesion of the wiper blade, but also prevents the wiper blade from injuring even when the vehicle is traveling at a high speed. The protector 30 extends along the longitudinal direction of the cleaning rubber 10, as shown in FIGS. 3A and 3B, and the leaf spring assembly 20 is positioned on the upper side of the cleaning rubber 10. In the state in which the washing rubber 10 and the leaf spring assembly 20 at the same time to be fitted and fixed to the inside. In this way, by using the protector 30, the washing rubber 10 and the leaf spring assembly 20 can be fastened to each other by a simple operation. 1 and 2, end caps 60 are fitted to both ends of the protector 30.

Figure 6 is a perspective view showing the structure of the base and the bracket coupled to the wiper blade according to the first embodiment of the present invention, Figure 7 is a view showing a structure in which the spoiler is mounted to the bracket according to the first embodiment of the present invention Reference is a perspective view.

First, as shown in Figure 2, the base 40 is coupled to the middle portion of the protector 30, the bracket 50 is coupled to the upper side of the base. On the other hand, a pair of spoilers 70 are coupled to both sides of the bracket 50, and the center cover 80 is coupled to the upper side of the bracket 50. Referring to Figure 6 in more detail, the base 40 has a plurality of fastening protrusions 44 on the upper side, the lower side to support the protector 30 from the lower side when fitted to the protector 30 Hanging jaw 44 that serves to make it is provided. Thus, the base 40 is fitted to the protector 30 by fitting from one end of the protector 30, moving to the middle, and then caulking. The bracket 50 has a plurality of fastening holes 58 on the lower side thereof. The fastening protrusions 42 of the base 40 are inserted into the plurality of fastening holes 58 and then caulked to form the base 40. ) Are mutually coupled. The bracket 50 consists of a pair of side walls 52a and 52b facing each other and a pair of connecting portions 54 vertically connected to the upper side of both ends of the side walls 52a and 52b. Engaging jaws 56 are provided at the bottom of both end portions of the pair of side walls 52a and 52b inwardly, respectively. Accordingly, spoiler mounting portions are formed on both sides of the bracket 50 by the pair of side walls 52a and 52b, the pair of connecting portions 54 and the locking jaw 56. As illustrated in FIG. 7, the spoiler 70 may be mounted on the bracket 50 by fitting or caulking the spoiler 70 to the spoiler mounting unit, respectively. In this case, it is preferable that the outer circumferential surface of the spoiler 70 has a streamlined structure inclined in the direction in which the driving wind blows. When the vehicle is driven after the wiper blade having the spoiler 70 having such a structure is mounted on the vehicle, the driving wind blown from the front part of the vehicle passes through the inclined surface of the spoiler 70 provided at the wiper blade to the rear of the vehicle. In this case, the running wind flowing along the inclined surface of the spoiler 70 eventually presses the wiper blade toward the vehicle windshield surface. As a result, the wiper blades remain in close contact with the front windshield of the vehicle, which prevents the wiper blades from swinging or floating during high-speed driving, and effectively prevents rain or other debris from flowing down the windshield of the vehicle. It can be removed.

A plurality of rivet fastening holes 51 are formed in the pair of side walls 52a and 52b at positions opposing each other. A rivet (not shown) is fixed to the rivet fastening hole 51, and a known center clip (not shown) is coupled to the rivet. The wiper arm having an end portion annular to the center clip is fitted to mount the wiper blade to the wiper arm.

 8 is a reference perspective view showing a structure in which a center cover is mounted according to the first embodiment of the present invention. Referring to FIG. 8, the center cover fastening holes 57 and the center cover fastening grooves 59 are formed in the pair of side walls 52a and 52b constituting the bracket 50, respectively, at positions facing each other. The center cover fastening hole 57 is rotatably coupled to the protruding hinge 82 formed to protrude on one side of the center cover 80. The center cover 80 is rotated inwardly of the bracket about the protruding hinge portion 82 fastened to the center cover fastening hole 57 so that the protrusion 84 provided on the other side of the center cover 80 is centered. It is coupled to the cover fastening groove 59 and fixed. As such, after the wiper arm 200 is coupled to the center clip coupled in the bracket 50, the wiper arm connection part is covered by the center cover 80 by covering the opening that is exposed on the upper side of the bracket with the snow in winter. Freezing can be prevented beforehand. In addition, the foreign matter may accumulate on the wiper arm connection portion to eliminate the fear of causing a failure or malfunction. On the other hand, after the wiper blade is mounted on the wiper arm 200, the other side of the center cover 80 may be covered so as to be in contact with the wiper arm to prevent the wiper arm from being spaced apart or separated. In addition, when the wiper blade is replaced, the wiper arm 200 can be easily dismounted by releasing only the center cover 80 from the bracket 50.

12 is a flowchart showing a process of manufacturing a wiper blade according to the first embodiment of the present invention. Referring to Figure 12 describes a process for manufacturing a wiper blade according to the first embodiment of the present invention.

First, the support is fitted to the groove formed to face each other in the longitudinal direction of both sides of the cleaning rubber (S10). The support serves to support the cleaning rubber.

Then, by spot welding, a first leaf spring having a unique curvature and a length equal to the length of the cleaning rubber and a second leaf spring having a length and curvature smaller than the length and curvature of the first leaf spring are joined by spot welding. To produce a leaf spring assembly (S20). In this case, the leaf spring assembly may be composed of a plurality of leaf springs whose length and curvature gradually decrease in the order of stacking in the upward direction.

Then, in the state in which the leaf spring assembly is located on the upper side of the cleaning rubber, the rubber and the leaf spring assembly are secured by fitting with the protector (S30).

Then, the base is fixed by fastening the base to the center of the protector, and the base and the bracket are coupled to each other by inserting a plurality of fastening protrusions formed on the upper side of the base into a plurality of fastening holes formed on the bottom side of the bracket and caulking ( S40).

Then, a pair of spoilers are respectively coupled to the spoiler mounting portions formed on both sides of the bracket (S50).

Then, the assembly coupled to the base and the spoiler to the bracket is coupled to the middle portion of the protector (S60). In this case, the bases are fitted from the distal end of the protector and moved to the middle and eventually coked to engage with each other.

Next, the center cover is coupled to the center cover fastening holes formed on the pair of sidewalls of the bracket opposite to each other (S70), and end caps are fitted to both ends of the protector (S80). By the simple process as described above, the wiper blade according to the present invention can be efficiently produced.

2nd wiper blade Example

9 is a perspective view of a wiper blade according to a second embodiment of the present invention, and FIG. 10 is an exploded perspective view of a wiper blade according to a second embodiment of the present invention. FIG. 11 is a sectional view showing a section along the C-C line in FIG.

9 to 11, the wiper blade according to the second embodiment of the present invention has a structure in which spoilers 170a and 170b are integrally formed on the protectors 130a and 130b and the protector is divided into two parts. And the same as the first embodiment described above except that they are mutually coupled by the base. Hereinafter, detailed descriptions of the same technical contents as those of the first embodiment will be omitted, and the following description will focus on the differences.

9 and 10, the spoilers 170a and 170b are integrally formed on one side of the upper side of the protectors 130a and 130b. That is, in forming the protectors 130a and 130b, the spoilers 170a and 170b which are relatively soft on the upper surfaces of the protectors 130a and 130b are integrally formed by using the release extrusion molding method. Thus, unlike the first embodiment, it is not necessary to additionally attach a separate spoiler to the bracket, and thus it can be manufactured by a relatively simple assembly process.

Referring to Fig. 10, unlike the first embodiment, the protectors 130a and 130b are equally divided into two parts. 10 and 11, spoilers 170a and 170b are integrally provided on one side of each of the divided protectors 130a and 130b, and the leaf spring assemblies 120a and 120b are provided with a cleaning rubber. The respective protectors 130a and 130b are coupled to each other in a state of being positioned on the upper side of the 110. The base 140 is coupled to the centers of the protectors 130a and 130b coupled to each other via the leaf spring assemblies 120a and 120b and the cleaning rubber 110 to fix the evenly divided protectors.

Fig. 13 is a flowchart showing a process of manufacturing a wiper blade according to the second embodiment of the present invention. Referring to Figure 13 describes a process for manufacturing a wiper blade according to a second embodiment of the present invention.

First, the support is fitted to the groove formed to face each other in the longitudinal direction of both sides of the cleaning rubber (S110). The support serves to support the cleaning rubber.

Then, by spot welding, a first leaf spring having a unique curvature and a length equal to the length of the cleaning rubber and a second leaf spring having a length and curvature smaller than the length and curvature of the first leaf spring are joined by spot welding. To prepare a leaf spring assembly (S120). In this case, the leaf spring assembly may be composed of a plurality of leaf springs whose length and curvature gradually decrease in the order of stacking in the upward direction.

Next, in a state in which the leaf spring assembly is positioned on the upper side of the cleaning rubber, the protectors formed by the spoiler are integrally divided and integrally formed on the upper side of each side (S130).

Then, the base is caulked and coupled to the center of the protector and evenly divided the protectors to each other (S140), after inserting a plurality of fastening protrusions formed on the upper side of the base into a plurality of fastening holes formed on the lower side of the bracket The base and the bracket are coupled to each other by caulking (S150).

Then, the center cover is coupled to the center cover fastening holes formed on the pair of sidewalls facing each other of the bracket (S160), and end caps are fitted to both ends of the protector (S170). Unlike the first embodiment, the manufacturing process according to the second embodiment does not require a separate spoiler mounting process, and thus, the wiper blade can be manufactured by a relatively simple assembly process.

Although the present invention has been illustrated and described with reference to certain preferred embodiments, the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described embodiments. Various changes and modifications will be possible to those skilled in the art. Thus, for example, it will be apparent to those skilled in the art that the configuration of the wiper blade shown in the drawings may be modified or modified without departing from the spirit and scope of the invention, and the invention is limited only by the claims that follow.

According to the wiper blade device according to the present invention, the following effects can be obtained.

First, by stacking and joining multiple leaf springs of different lengths and curvatures, a uniform force is transmitted across the entire section of the wiper blade, improving adhesion to the windshield of the vehicle, resulting in cleaner wiping It was. Meanwhile, in the conventional flat blade, the wiping performance, which was particularly weak at the edge of the front seat glass, was greatly improved by joining a plurality of leaf springs having different curvatures.

Second, unlike conventional flat blades, by adopting a relatively narrow leaf spring, and fastening the leaf spring and the cleaning rubber directly through the protector, when using the conventional wide flat blade, the driver may The problem of obscuring the field of vision was completely solved.

Third, unlike the spoiler structure that has been mounted over the entire blade span, by combining a spoiler with a predetermined length in the middle of the wiper blade, the floating or lifting during high speed driving is eliminated and the high speed driving performance is improved.

Fourth, by attaching the wiper arm to the bracket, and having a center cover that can seal the opening exposed in the upper direction of the bracket, the problem that the winter snow is frozen at the arm fastening portion in the bracket to solve. In addition, the foreign matter is prevented from entering the arm fastening site has the effect of preventing the wiper failure or malfunction caused by the foreign matter in advance.

Claims (22)

In the vehicle wiper blade, Grooving rubber is formed to face each other in the longitudinal direction on both sides and is directly in close contact with the vehicle windshield for wiping; A first leaf spring having an inherent curvature and having a length equal to the length of the cleaning rubber and a second plate having a length and curvature smaller than the length and curvature of the first leaf spring and joined to an upper surface of the first leaf spring. A leaf spring assembly consisting of a spring; And A protector extending along the longitudinal direction of the cleaning rubber and simultaneously fixing and fixing the washing rubber and the leaf spring assembly to the inside thereof while the leaf spring assembly is positioned on the upper side of the cleaning rubber; Vehicle wiper blades comprising a. The method of claim 1, A base coupled to an intermediate portion of the protector and having a plurality of fastening protrusions provided on an upper side thereof; And A bracket having a plurality of fastening holes provided at a lower side thereof, the fastening protrusions of the base being inserted into the plurality of fastening holes and then being cocked to be coupled to the base; Vehicle wiper blades further comprising. The wiper blade for a vehicle according to claim 1 or 2, further comprising a pair of supports which are longitudinally fitted to both grooves of the cleaning rubber. 3. The vehicle wiper blade according to claim 1 or 2, wherein the leaf spring assembly comprises a plurality of leaf springs whose lengths and curvatures gradually decrease in the order of stacking in the upward direction. 5. The vehicle wiper blade according to claim 4, wherein the leaf spring assemblies are joined to each other by spot welding. 3. The vehicle wiper blade according to claim 1 or 2, further comprising an end cap fitted to both ends of the protector. 3. The vehicle wiper according to claim 2, wherein the bracket comprises a pair of side walls facing each other, and a pair of connecting portions vertically connected to the pair of side walls on upper surfaces of both end portions of the side walls. blade. According to claim 7, Spoiler mounting portion is formed on both sides of the bracket by the engaging jaw provided on the pair of connecting portions, the pair of side walls, the bottom surface of both ends of the pair of side walls, respectively, A vehicle wiper blade, characterized in that the pair of spoilers are respectively coupled. 9. The vehicle wiper blade according to claim 8, wherein the pair of spoilers are fitted or caulked to both mounting portions of the bracket. The vehicle wiper blade according to claim 8 or 9, wherein the outer circumferential surface of the spoiler is inclined in a direction in which the driving wind blows. 8. The vehicle wiper blade according to claim 7, wherein the pair of side walls are provided with a plurality of rivet fastening holes at positions facing each other. 8. The vehicle wiper blade according to claim 7, wherein a center cover fastening hole and a center cover fastening groove are formed at positions opposite to each other on the pair of side walls. The center cover fastening hole of the center cover fastening hinge is rotatably coupled to the center cover fastening hole, the center cover is rotated in the direction of the receiving portion of the bracket on the basis of the protruding hinge portion is the other projection of the center cover Vehicle wiper blades, characterized in that the fitting fitted in the center cover fastening groove. In the vehicle wiper blade, Grooving rubber is formed to face each other in the longitudinal direction on both sides and is directly in close contact with the vehicle windshield for wiping; A first leaf spring having an inherent curvature and having a length equal to the length of the cleaning rubber and a second plate having a length and curvature smaller than the length and curvature of the first leaf spring and joined to an upper surface of the first leaf spring. A leaf spring assembly consisting of a spring; The spoiler is integrally formed into two parts, and a spoiler is integrally formed on one side of each of the divided upper sides, and the leaf spring assembly is positioned on the upper side of the washing rubber, and the washing rubber and the leaf spring assembly are separated. Protector for fitting at the same time inside; A base having a plurality of fastening protrusions fitted on the middle of the protector to fix the evenly divided protectors to each other, and having an upper side thereof; And A bracket having a plurality of fastening holes provided at a lower side thereof, the fastening protrusions of the base being inserted into the plurality of fastening holes and then being cocked to be coupled to the base; Vehicle wiper blades comprising a. 15. The vehicle wiper blade according to claim 14, further comprising a pair of supports which are longitudinally fitted to both grooves of the cleaning rubber. The vehicle wiper blade according to claim 14 or 15, wherein the leaf spring assembly is composed of a plurality of leaf springs whose length and curvature gradually decrease in the order of stacking in the upward direction. The vehicle wiper blade according to claim 14 or 15, further comprising an end cap fitted to both ends of the protector. 15. The vehicle wiper blade according to claim 14, wherein the outer circumferential surface of the spoiler is inclined in a direction in which the driving wind blows. 15. The apparatus of claim 14, wherein the bracket comprises a pair of sidewalls facing each other, and a pair of connecting portions vertically connected to the pair of sidewalls on upper surfaces of both end portions of the sidewalls. Vehicle side wiper blades, characterized in that the center cover fastening hole and the center cover fastening groove are formed on the side wall facing each other. The center cover fastening hole of the center cover fastening hinge portion is rotatably coupled, the center cover is rotated in the inward direction of the receiving portion of the bracket based on the protruding hinge portion, the other projection of the center cover Vehicle wiper blades, characterized in that the fitting fitted in the center cover fastening groove. In the method for manufacturing a vehicle wiper blade, Fitting the support into grooves formed to face each other in the longitudinal direction of both sides of the washing rubber; A first leaf spring having an inherent curvature and having a length equal to the length of the cleaning rubber and a second leaf spring having a length and curvature smaller than the length and curvature of the first leaf spring are joined by spot welding. Manufacturing the assembly; Inserting and fixing the washing rubber and the leaf spring assembly to the protector while the leaf spring assembly prepared by the step II is located on the upper side of the washing rubber prepared by the step I; Coupling the base to the bracket by inserting a plurality of fastening protrusions formed on the upper side of the base into a plurality of fastening holes formed on the bottom side of the bracket, and then caulking the IV to the center portion of the protector; Coupling each pair of spoilers to spoiler mounts formed on both sides of the bracket; Coupling VI to the intermediate portion of the protector prepared by step III by assembling the base and spoiler to the bracket by steps IV and V; Coupling a center cover to a center cover fastening hole formed in a pair of sidewalls facing each other of the bracket; And Fitting end caps to both ends of the protector; Wiper blade manufacturing method comprising a. In the method for manufacturing a vehicle wiper blade, Fitting the support into grooves formed to face each other in the longitudinal direction of both sides of the washing rubber; A first leaf spring having an inherent curvature and having a length equal to the length of the cleaning rubber and a second leaf spring having a length and curvature smaller than the length and curvature of the first leaf spring are joined by spot welding. Manufacturing the assembly; With the leaf spring assembly prepared in step II positioned on the upper side of the washing rubber prepared in step I, fitting the protectors having the spoiler formed integrally with each other and having the spoiler integrally formed on each upper side. III;  The base is caulked and coupled to the center of the protector, and the evenly divided protectors are coupled to each other, and a plurality of fastening protrusions formed on the upper side of the base are inserted into a plurality of fastening holes formed on the lower side of the bracket and then caulked. Step IV to mutually combine; Coupling the center cover to a center cover fastening hole formed in a pair of sidewalls facing each other of the bracket; And Fitting end caps to both ends of the protector VI; Wiper blade manufacturing method comprising a.

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