JP2023160040A - Sealed wiper structure - Google Patents

Abstract

To provide a sealed wiper structure which maintains sealing performance of an arrangement structure inside a wiper blade, maintains elastic pressing force of a metallic spring member, and makes a service life of the wiper blade longer.SOLUTION: A holder 20 is coupled to a bottom surface side of an engagement seat, and includes a holder plate section 21 having a through groove 210, and a holder frame section 22 connected to the holder plate section and having a housing groove. A spring member 30 is inserted into the through groove and extends to both sides of the holder. A waterproof sleeve 40 includes a case, an internal space which is provided in the case and into which the holder is inserted, and an external space formed at an outside the case by molding. A blade rubber 50 includes an insertion section which is inserted into the external space, and a blade section connected to the insertion section and exposed to an outside of the waterproof sleeve, thereby constituting a sealed wiper structure.SELECTED DRAWING: Figure 9

Description

The present invention relates to a wiper structure, and particularly to a waterproof wiper structure.

A wiper blade for a vehicle is disposed on the outer surface of the windshield of a vehicle, and is joined to a wiper drive arm so that the wiper drive arm applies an actuating force to the wiper blade to drive the wiper blade, By repeatedly swinging on the glass surface, it wipes away foreign objects such as rain and dust on the glass.

Generally, the wiper structure mainly includes an engagement seat, a metal spring member, a flow guide cover, and a blade rubber. A metal spring member and a blade rubber are coupled to the engagement seat, and a flow guide cover is attached to the top of the engagement seat and connected to the wiper drive arm, thereby driving the blade rubber via the wiper drive arm. The driver then moves the vehicle and performs a cleaning operation on the glass surface of the vehicle.

However, in the above-mentioned wiper structure, since the joint between the diversion cover and the metal spring member is not sealed, rainwater easily permeates through the diversion cover and soaks the metal spring member. Components are likely to corrode and shorten their lifespan. Particularly when used in cold regions, the metallic spring members may freeze and lose their elasticity, so further improvements are required.

The present invention provides a sealed wiper structure that maintains the sealing properties of the arrangement inside the wiper blade, maintains the elastic pressing force of the metallic spring member, and extends the life of the wiper blade.

To achieve the above object, the present invention provides a sealed wiper structure comprising an engagement seat, a holder, a spring member, a waterproof sleeve, and a blade rubber. The holder is coupled to the bottom side of the engagement seat, and includes a holder plate portion having a through groove, and a holder frame portion connected to the holder plate portion and having an accommodation groove. The spring member is inserted into the through groove and extends to both sides of the holder. The waterproof sleeve includes a case, an internal space provided within the case into which the holder is inserted, and an external space formed outside the case by molding. The blade rubber includes an insertion part inserted into the external space, and a blade part connected to the insertion part and exposed to the outside of the waterproof sleeve.

The present invention provides a sealed wiper that maintains the structural strength and flexibility that a waterproof sleeve should have, and maintains a good wrinkle-free appearance because the thickness of the top wall of the waterproof sleeve is greater than the thickness of the side walls. Provide structure.

The present invention provides a sealed wiper structure that closes the waterproof sleeve by coupling end cap assemblies to both ends of the waterproof sleeve to isolate the spring member inserted therein from outside water. do.

Compared to conventional wiper structures, the sealed wiper structure of the present invention is provided with a waterproof sleeve, and the spring member passes through the holder and is inserted into the internal space of the waterproof sleeve, so as to seal the internal space. End cap assemblies are further disposed at both ends of the sleeve to make the inner space a sealed space, and the spring member inserted into the inner space can be isolated from outside water, which serves the purpose of waterproofing. can be achieved while maintaining the desired elasticity.

FIG. 1 is a three-dimensional view schematically showing the appearance of a sealed wiper structure of the present invention. FIG. 1 is an exploded three-dimensional view schematically showing the sealed wiper structure of the present invention. FIG. 3 is a schematic diagram showing the combination of the holder and the waterproof sleeve of the present invention. FIG. 3 is a sectional view showing a combination of a waterproof sleeve and a blade rubber according to the present invention. FIG. 3 is a schematic diagram showing a combination of an end cap assembly coupled to a sealed wiper structure of the present invention. FIG. 3 is a schematic diagram showing bonding of the inner end cap of the present invention. FIG. 3 is a schematic diagram showing a combination of an outer end cap and an inner end cap of the present invention. 1 is a cross-sectional view of the sealed wiper structure of the present invention with an end cap assembly coupled thereto; FIG. FIG. 3 is a sectional view showing a combination of sealed wiper structures of the present invention.

Detailed explanations and technical contents regarding the present invention will be explained below along with the drawings, but the accompanying drawings are used for explanation and do not limit the present invention.

See FIGS. 1 and 2. A three-dimensional view and an exploded three-dimensional view of the external appearance of the sealed wiper structure of the present invention are each schematically shown. The present invention provides a sealed wiper structure 1 for coupling with a wiper drive arm 2 . The sealed wiper structure 1 includes an engagement seat 10, a holder 20, a spring member 30, a waterproof sleeve 40, and a blade rubber 50. The holder 20 is provided on the bottom side of the engagement seat 10 and is coupled to the spring member 30 and the waterproof sleeve 40. Note that one end of the blade rubber 50 is inserted into the waterproof sleeve 40.

In one embodiment of the invention, the sealed wiper structure 1 further comprises a fixed seat 60 . The fixed seat 60 is coupled to the engagement seat 10. The fixed seat 60 covers the engagement seat 10 and holds one end of the wiper drive arm 2.

Specifically, the engagement seat 10 is provided for coupling with the wiper drive arm 2. Further, the sealed wiper structure 1 further includes a locking seat 15. The locking seat 15 is coupled to the bottom side of the engaging seat 10 and has a pair of through holes 150.

The holder 20 is coupled to the bottom side of the engagement seat 10. The holder 20 includes a holder plate part 21 and a holder frame part 22 connected to the holder plate part 21. The holder plate portion 21 has both sides thereof inserted into the pair of through holes 150 of the locking seat 15, and has a through groove 210. Further, the holder frame portion 22 has a receiving groove 220. In this embodiment, the holder frame portion 22 is composed of a plurality of hooks 221 provided oppositely.

Also, please refer to FIGS. 3 and 4. FIG. 1 is a schematic view showing a combination of a holder and a waterproof sleeve of the present invention, and a sectional view showing a combination of the waterproof sleeve and a blade rubber, respectively. In this embodiment, the spring member 30 is inserted into the through groove 210 and extends to both sides of the holder 20 . Preferably, the spring member 30 is a metallic spring member.

The waterproof sleeve 40 includes a case 41, an internal space 42 provided in the case 41, and an external space 43 formed outside the case 41 by molding. The holder 20 is inserted into the internal space 42 . Specifically, the internal space 42 and the external space 43 are each U-shaped, and an opening 44 is provided on one side of the external space 43.

To explain in more detail, the case 41 includes a top wall 411 that abuts the engagement seat 10, an inner bottom wall 412 that faces the top wall 411 and abuts the holder plate 21, and a top wall 411 and the holder plate 21. Two side walls 413 connecting the inner bottom wall 412 are included. In this embodiment, the thickness of the top wall 411 is set to be equal to that of the two side walls in order to maintain the structural strength and flexibility that the waterproof sleeve 40 should have, and to prevent wrinkles from forming in order to maintain a good appearance. Please note that the thickness is larger than that of 413. In this embodiment, the top wall 411 has a thickness of about 0.5 mm to 1 mm, and the side wall 413 has a thickness of about 0.3 mm to 0.6 mm.

The material of the waterproof sleeve 40 is made of polyolefin thermoplastic elastomer (TPV, Themoplastic Vulcanizate). Polyolefin thermoplastic elastomer is a stable elastomer obtained by kneading two types of substances: ethylene propylene diene monomer (EPDM) and polypropylene (PP) through dynamic sulfurization treatment. It is non-toxic, environmentally friendly, has good aging resistance, and has the characteristics of little change in hardness due to temperature. In addition, TPV does not contain carcinogenic substances such as nitrites or heavy metals, and is recyclable, making it hygienic, SGS certified, and compliant with the EU's ROHS Directive. Furthermore, TPV can be used in the range of -30°C to 120°C, and the Shore hardness does not change by more than 5A in the range of -20°C to 40°C, making it superior to conventional materials such as PVC and EPDM.

Further, the waterproof sleeve 40 of the present invention is manufactured by extrusion molding, and there are no restrictions on length or shape, so it has the advantage of a high quality product rate, low cost, and high yield.

Additionally, the blade rubber 50 is coupled within the waterproof sleeve 40. The blade rubber 50 includes an insertion portion 51, a blade portion 52 connected to the insertion portion, and a connection portion 53 connected between the insertion portion 51 and the blade portion 52. More specifically, the insertion portion 51 is inserted into the external space 43. The blade portion 52 is exposed to the outside of the waterproof sleeve 40. The connecting portion 53 is erected in the opening 44 .

Please continue to refer to FIGS. 5 to 8. A schematic diagram showing a combination of joining an end cap assembly to the sealed wiper structure of the present invention, a schematic diagram showing adhesion for joining an inner end cap, and an outer end cap to an inner end cap. A schematic diagram showing the mating combination and a cross-sectional view showing the mating of the sealed wiper structure and the end cap assembly are shown. The sealed wiper structure 1 of the present invention further includes a pair of end cap assemblies 70. The pair of end cap assemblies 70 are disposed at both ends of the case 41 and close the interior space 42 .

Specifically, each end cap assembly 70 includes an inner end cap 71 and an outer end cap 72. The inner end cap 71 is bonded to the case 41, and the outer end cap 72 is fitted to the outside of the inner end cap 71. As a result, the internal space 42 can form a sealed space, and the spring member 30 inserted into the internal space 42 can be shielded from external water, thereby achieving the purpose of waterproofing. can.

Furthermore, the inner end cap 71 includes an adhesive part 701 into which the case 41 is inserted, a coupling part 702 that protrudes to the outside of the case 41, and a collar 703. The surface of the bonding portion 702 is higher than the adhesive portion 701, and the collar 703 is disposed between the bonding portion 702 and the adhesive portion 701 to prevent spillage of adhesive during sealing work. . Further, the collar 703 is provided to position the inner end cap 71.

As shown in FIG. 7, the inner end cap 71 has a protrusion 711 at its bottom, and the outer end cap 72 has a corresponding recess 721 at its bottom. In this embodiment, the inner end cap 71 is provided with a plurality of positioning grooves 712. Further, the outer end cap 72 is provided with a plurality of positioning ribs 722 corresponding to these positioning grooves 712. When the outer end cap 72 is fitted to the inner end cap 71, these positioning ribs 722 are positioned with respect to these positioning grooves 712, and the accuracy of the arrangement is improved.

Note that the inner end cap 71 is further provided with a through hole 713. The through hole 713 is provided for injecting an adhesive into the external space 43 and the opening 44 of the waterproof sleeve 40 to seal the sides of the waterproof sleeve 40 .

Please also refer to FIG. A cross-sectional view of a combination end cap assembly coupled to a sealed wiper structure of the present invention is shown. The sealed wiper structure 1 of the present invention further includes a locking member 80. The locking member 80 includes the engaging seat 10, the locking seat 15, the top wall 411 of the waterproof sleeve 40, the spring member 30, the holder plate portion 21 of the holder 20, and the inner bottom wall 412 of the waterproof sleeve 40. By inserting these in order, the engaging seat 10, the locking seat 15, the holder 20, the spring member 30, and the waterproof sleeve 40 are connected.

The above are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention. Other equivalent variations applying the spirit of the patent of the present invention shall fall within the protection scope of the present invention.

1 Sealed wiper structure 2 Wiper drive arm 10 Engagement seat 15 Locking seat 150 Through hole 20 Holder 21 Holder plate portion 210 Penetration groove 22 Holder frame portion 220 Accommodation groove 221 Hook 30 Spring member 40 Waterproof sleeve 41 Case 411 Top wall 412 Inner bottom wall 413 Side wall 42 Internal space 43 External space 44 Opening 50 Blade rubber 51 Insertion part 52 Blade part 53 Connecting part 60 Fixed seat 70 End cap assembly 701 Adhesive part 702 Joint part 703 Brim 71 Inner end Cap 711 Convex portion 712 Positioning groove 713 Through hole 72 Outer end cap 721 Recess 722 Positioning rib 80 Lock member

Claims (10)

an engagement seat;
a holder including a holder plate portion coupled to the bottom side of the engagement seat and having a through groove; and a holder frame portion connected to the holder plate portion and having a housing groove;
a spring member inserted into the through groove and extending to both sides of the holder;
a waterproof sleeve including a case, an internal space provided in the case into which the holder is inserted, and an external space formed outside the case by molding;
A sealed wiper structure comprising: an insertion part inserted into the external space; and a blade rubber connected to the insertion part and including a blade part exposed outside the waterproof sleeve. The sealed wiper structure according to claim 1, further comprising a fixed seat coupled to the engagement seat so as to cover the engagement seat and holding one end of the wiper drive arm. The sealed wiper structure according to claim 1, further comprising a locking seat having a pair of through holes through which both sides of the holder plate are inserted. 2. The sealed wiper structure according to claim 1, wherein the holder frame portion is comprised of a plurality of hooks provided facing each other. The case includes a top wall that abuts the engagement seat, an inner bottom wall that faces the top wall and abuts the holder plate, and two side walls that connect the top wall and the inner bottom wall. The sealed wiper structure according to claim 1, wherein the top wall has a thickness greater than the two side walls. The sealed wiper structure according to claim 5, further comprising a locking member that is inserted in order through the engagement seat, the top wall, the spring member, the holder plate, and the inner bottom wall. The sealed wiper structure according to claim 1, wherein the internal space and the external space are each U-shaped, and an opening is provided on one side of the external space. 8. The sealed wiper structure according to claim 7, wherein the blade rubber further includes a connecting part that is erected in the opening and is connected between the insertion part and the blade part. The sealed wiper structure of claim 1, further comprising a pair of end cap assemblies disposed at opposite ends of the case to close the interior space. 10. The seal of claim 9, wherein each end cap assembly includes an inner end cap adhered to the case and an outer end cap mated to the outside of the inner end cap. Type wiper structure.

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