Double-steel-piece boneless wiper

Abstract

The application discloses a double-steel-piece boneless wiper, wherein elastic steel pieces are fixed on a rubber strip through buckles, the top plates of the buckles extend downward on both sides to form elastic clamping claws, and the lower ends of the elastic clamping claws are bent to form clamping hooks; the elastic steel pieces are provided with first clamping grooves, the sheaths are provided with first clamping blocks in sliding grooves and embedded in the first clamping grooves, thereby forming a one-time axial limiting structure of the sheaths; one end of the top plate of the buckle is bent upward to form an inverted hook, the inner cavity of the sheath is provided with a sheath stopper matched with the inverted hook, and the two form a two-time axial limiting structure of the sheath; in addition, a clamping claw stopper is arranged in a second sliding groove on the side of the rubber strip, a third clamping groove is formed between the clamping claw stopper and a closed end, and the clamping hooks are clamped into the third clamping groove after penetrating through the elastic steel pieces. According to the application, the sheath adopts the two-time axial limiting structure design, can effectively prevent the sheath from slipping outward during use, the buckles are directly clamped into the third clamping groove on the rubber strip after penetrating through the elastic steel pieces, the rubber strip is fixed firmly, the use reliability is improved, and the operation noise is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of windshield wipers, in particular to a double-steel-piece boneless windshield wiper. BACKGROUND

[0002] Compared with the single-steel-piece boneless windshield wiper, the double-steel-piece boneless windshield wiper further optimizes the performance of the windshield wiper by embedding side pressure steel pieces on both sides of the rubber strip, for example: the stress on both sides of the rubber strip is more balanced, avoiding the problem of poor middle adhesion caused by the weakening of the elastic steel piece (back arch) pressure of the traditional boneless windshield wiper after long-term use; the side pressure steel pieces support the rubber strip, reducing the distortion or wavy wear of the rubber strip caused by ultraviolet rays and high temperature, and prolonging the service life.

[0003] Among them, the Chinese utility model patent CN 221851871 U discloses a boneless windshield wiper, a steel piece is fixedly installed at the top of a rubber strip, a spoiler strip is clamped on the steel piece, a plurality of pairs of fixing holes are arranged on the steel piece, fixing claws clamped on both sides of the rubber strip are fixed in the fixing holes, flat wires are clamped on the front and rear sides of the rubber strip, and two clamping protrusions matched with the fixing claws are arranged on the outer side of the right end of each flat wire to axially limit the fixing claws. However, the scheme has the following problems:

[0004] Firstly, the spoiler strip (sheath) in the scheme is axially limited by the clamping openings at the left and right ends of the steel piece. Since the steel piece is relatively thin and the clamping openings are small, the clamping openings are prone to lose the limiting effect due to aging of the sheath, extreme temperature difference and ice accumulation, and the spoiler strip is prone to fall off.

[0005] Secondly, the fixing claws in the scheme are axially limited by the clamping protrusions on the flat wires. The fixing claws are in sliding fit with the sliding grooves on the rubber strip. Considering the different thermal expansion and contraction coefficients between materials, a certain axial contraction gap is usually reserved between the flat wires and the rubber strip to avoid deformation of the windshield wiper caused by thermal expansion and contraction. Therefore, the axial movement range of the rubber strip is large, and the rubber strip moves back and forth during the operation of the windshield wiper, which produces a large noise. SUMMARY

[0006] Therefore, the present application provides a double-steel-piece boneless windshield wiper to solve the problems of easy falling off of the spoiler strip (sheath) and large working noise in the prior art.

[0007] The double-steel-piece boneless windshield wiper provided by the present application includes a rubber strip and an elastic steel piece arranged on the top surface of the rubber strip, a sheath is arranged on the elastic steel piece, side pressure steel pieces are embedded on both sides of the rubber strip, respectively, and the two ends of the elastic steel piece are fixed on the top surface of the rubber strip by buckles,

[0008] The buckle comprises a top plate, the top surface of the top plate is upwardly bent to form a barb away from one side of the center of the boneless windshield wiper, and the two side edges of the top plate extend downward to form elastic clamping jaws, and the lower ends of the two elastic clamping jaws are oppositely bent to form clamping hooks;

[0009] The two side edges of the end of the elastic steel sheet are respectively provided with first clamping grooves, the two opposite inner walls of the inner cavity of the sheath are respectively provided with sheath sliding grooves, the sheath sliding grooves are provided with first clamping blocks matched with the first clamping grooves, the elastic steel sheet is inserted into the sheath sliding groove, and the first clamping blocks are clamped into the first clamping grooves to form a double axial limiting structure of the sheath.

[0010] The inner cavity of the sheath is provided with a sheath stop block on the outer end top wall, the sheath stop block is arranged corresponding to the barb, the first clamping block is located on the outer side of the buckle in the length direction, the sheath stop block is in abutment with the barb to form a double axial limiting structure of the sheath.

[0011] The two side surfaces of the rubber strip are respectively provided with first sliding grooves and second sliding grooves from top to bottom, the two ends of the first sliding grooves and the second sliding grooves are closed, and the side pressing steel sheet is arranged in the first sliding groove; the end of the second sliding groove is further provided with a clamping jaw stop block, a third clamping groove is formed between the clamping jaw stop block and the closed end of the second sliding groove, and the clamping hook is clamped in the third clamping groove through the elastic steel sheet.

[0012] The double-steel-sheet boneless windshield wiper has a double axial limiting structure of the sheath, can effectively prevent the sheath from sliding outward, and improves the reliability; in addition, the elastic clamping jaw of the buckle is clamped in the third clamping groove on the rubber strip after penetrating through the elastic steel sheet, the rubber strip is not easy to loosen, and the use is reliable.

[0013] In the above technical scheme, preferably, the opposite side edges of the end of the side pressing steel sheet are respectively provided with second clamping grooves, the first sliding groove is provided with second clamping blocks matched with the second clamping grooves, the side pressing steel sheet is inserted into the first sliding groove, the second clamping blocks are clamped into the second clamping grooves, a first reserved gap is arranged between the second clamping blocks and the side walls of the second clamping grooves, a second reserved gap is arranged between the clamping hook and the side walls of the third clamping groove, and the second reserved gap is smaller than the first reserved gap. This design reduces the axial movement gap of the rubber strip and reduces the working noise.

[0014] In the above technical scheme, preferably, the end of the elastic steel sheet is provided with two strip-shaped holes penetrating through the thickness direction thereof, the two strip-shaped holes are arranged side by side along the width direction of the elastic steel sheet, and the elastic clamping jaws are arranged one by one corresponding to the two strip-shaped holes.

[0015] In the technical scheme, preferably, the first chamfer is arranged at one end of the hook away from the center of the boneless wiper.

[0016] In the technical scheme, preferably, the second chamfer is arranged at one end of the clamping jaw towards the center of the boneless wiper.

[0017] In the technical scheme, preferably, the side surface of the first clamping block and the sheath block towards the center of the boneless wiper is a slope surface.

[0018] In the technical scheme, preferably, the sheath block is a U-shaped block, and the opening is arranged towards the center of the boneless wiper, thereby saving material and reducing weight.

[0019] In the technical scheme, preferably, the width of the upper two ends of the rubber strip is greater than the width of the middle part.

[0020] According to the technical scheme, the double-steel-sheet boneless wiper provided by the application solves the problems of the existing technology that the spoiler (sheath) is easy to fall off and the large working noise. Compared with the existing technology, the application has the following beneficial effects:

[0021] The first clamping block on the elastic steel sheet and the first clamping groove in the sheath sliding groove constitute a one-time axial limiting structure of the sheath, the sheath block on the top wall of the sheath inner cavity and the barb on the clamping buckle constitute a two-time axial limiting structure of the sheath, the double-time axial limiting structure can effectively prevent the sheath from sliding outward, the elastic clamping jaw on the clamping buckle penetrates through the elastic steel sheet and is directly clamped in the third clamping groove on the rubber strip, and the rubber strip is not easy to loosen, thereby being reliable in use. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the application or the technical schemes in the prior art, the following will briefly introduce and describe the drawings needed to be used in the description of the embodiments of the application or the prior art. Obviously, the drawings in the following description are only some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

[0023] Figure 1 The drawings show a schematic diagram of the double-steel-sheet boneless wiper provided by the application;

[0024] Figure 2 The drawings show a side view of the double-steel-sheet boneless wiper; Figure 1

[0025] Figure 3 The drawings show a schematic diagram of the clamping buckle in the application;

[0026] Figure 4 The drawings show a schematic diagram of the clamping buckle in the application; Figure 3

[0027] The drawings show a schematic diagram of the clamping buckle in the application;​Figure 5 As shown in the exploded structural diagram of the double-steel-piece boneless windshield wiper in Figure 1

[0028] Figure 6 As shown in the exploded structural diagram of the double-steel-piece boneless windshield wiper in Figure 1

[0029] Figure 7 As shown in the exploded structural diagram of the double-steel-piece boneless windshield wiper in Figure 1

[0030] Figure 8 As shown in the exploded structural diagram of the double-steel-piece boneless windshield wiper in

[0031] Figure 9 As shown in the exploded structural diagram of the double-steel-piece boneless windshield wiper in Figure 8

[0032] Figure 10 As shown in the exploded structural diagram of the double-steel-piece boneless windshield wiper in Figure 8

[0033] Figure 11 As shown in the exploded structural diagram of the double-steel-piece boneless windshield wiper in Figure 2

[0034] Figures 1-11 In the double-steel-piece boneless windshield wiper, the corresponding relationship of the components is as follows:

[0035] Rubber strip 10, elastic steel piece 20, sheath 30, side pressing steel piece 40, buckle 50;

[0036] First sliding groove 11, second sliding groove 12, second clamping block 13, clamping jaw block 14, second chamfer 15, third clamping groove 16;

[0037] Strip-shaped hole 21, first clamping groove 22;

[0038] Sheath sliding groove 31, first clamping block 32, sheath block 33;

[0039] Second clamping groove 41;

[0040] Top plate 51, elastic clamping jaw 52, clamping hook 53, first chamfer 54, reverse hook 55. DETAILED DESCRIPTION

[0041] The technical solutions of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the following described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0042] ​​​​​​In order to make the technical solutions and implementation modes of the present application clearer and more comprehensible, the following will introduce several preferred specific embodiments for implementing the technical solutions of the present application.

[0043] It should be noted that the terms "inner", "outer", "front", "rear", "left", "right" and the like in the present document are described based on the product in use as the reference object. Obviously, the use of the corresponding terms does not constitute a limitation on the protection scope of the present application.

[0044] Since the double-steel-piece boneless wiper is of an elongated and central-symmetrical structure, in order to clearly show the specific structure of the double-steel-piece boneless wiper in the present application, the drawings in the description only show a part of the end portion thereof.

[0045] As shown in Figure 1 , Figure 2 , the double-steel-piece boneless wiper provided by the present application comprises a rubber strip 10 and an elastic steel piece 20 arranged on the top surface of the rubber strip 10. A sheath 30 is clamped and arranged on the elastic steel piece 20, and side pressing steel pieces 40 are respectively embedded on the two side surfaces of the rubber strip 10. Among them, the two ends of the elastic steel piece 20 are respectively fixed on the top surface of the rubber strip 10 through buckles 50.

[0046] As shown in Figure 3 , Figure 4 , the buckle 50 comprises a top plate 51, the two side edges of the top plate 51 respectively extend downward to form elastic clamping claws 52, and the lower ends of the two elastic clamping claws 52 are respectively bent to form clamping hooks 53. One end of the clamping hook 53 away from the center of the boneless wiper is provided with a first chamfer 54 to facilitate installation. The side of the top surface of the top plate 51 away from the center of the boneless wiper is bent upward to form an inverted hook 55.

[0047] As shown in Figure 5 , Figure 6 , Figure 7 , the end portion of the elastic steel piece 20 is provided with two strip-shaped holes 21 penetrating through the thickness direction thereof, the two strip-shaped holes 21 are arranged side by side along the width direction of the elastic steel piece 20 and correspondingly arranged with the elastic clamping claws 52, the two elastic clamping claws 52 of the buckle 50 pass through the two strip-shaped holes 21 on the elastic steel piece 20 and are clamped on the rubber strip 10 to fix the elastic steel piece 20 on the top surface of the rubber strip 10.

[0048] The two side edges of the end portion of the elastic steel piece 20 are respectively provided with first clamping grooves 22, and the two opposite inner walls of the inner cavity of the sheath 30 are respectively provided with sheath sliding grooves 31, which are matched with the thickness of the elastic steel piece 20. The sheath sliding groove 31 is provided with a first clamping block 32 matched with the first clamping groove 22. The elastic steel piece 20 is inserted into the sheath sliding groove 31, and the first clamping block 32 is clamped into the first clamping groove 22, thereby forming a one-axial-direction limiting structure of the sheath 30. In the present application, the axial direction refers to the length direction of the boneless wiper.

[0049] The inner cavity outer end top wall of the sheath 30 is provided with a sheath stopper 33, which is a U-shaped block with an opening facing the center of the boneless windshield wiper. The sheath stopper 33 is arranged corresponding to the barb 55 on the buckle 50. In the length direction, the first clamping block 32 is located outside the buckle 50, and the two are arranged at intervals in the horizontal projection plane. After the sheath 30 is assembled, the sheath stopper 33 abuts against the barb 55, forming a double axial limiting structure of the sheath 30. The side surface of the first clamping block 32 and the sheath stopper 33 facing the center of the boneless windshield wiper is a slope surface, facilitating the insertion of the sheath 30.

[0050] In the existing design, the sheath and the elastic steel sheet only constitute an axial limiting structure through the first clamping block and the first clamping groove. Due to long-term exposure to ultraviolet rays, high temperature or chemicals (such as glass water), the sheath and the first clamping block 32 may become brittle or shrink; extreme temperature difference may also cause the elastic steel sheet (metal) and the sheath (high polymer material) to expand and deform too much; in cold regions, ice and frost may also occupy the sheath sliding groove space, which may cause the sheath to fall off the elastic steel sheet.

[0051] To solve the above problems, the sheath 30 of the present application adds a double limiting structure composed of the barb 55 and the sheath stopper 33 on the basis of the single limiting structure composed of the first clamping block 32 and the first clamping groove 22, and the double axial limiting structure can effectively prevent the sheath 30 from sliding outward and improve the reliability.

[0052] In combination with Figure 8 , Figure 9 , Figure 10 , Figure 11 , the two side surfaces of the rubber strip 10 are respectively provided with a first sliding groove 11 and a second sliding groove 12 from top to bottom, and the end portions of the first sliding groove 11 and the second sliding groove 12 are closed. The first sliding groove 11 is matched with the side pressing steel sheet 40, the opposite side edges of the end portions of the two side pressing steel sheets 40 are respectively provided with a second clamping groove 41, and the first sliding groove 11 of the rubber strip 10 is provided with a second clamping block 13 matched with the second clamping groove 41, the side pressing steel sheet 40 is inserted into the first sliding groove 11, and the second clamping block 13 is clamped into the second clamping groove 41, thereby realizing the axial limiting of the side pressing steel sheet 40.

[0053] The end portion of the second sliding groove 12 of the rubber strip 10 is also provided with a clamping jaw stopper 14, one end of the clamping jaw stopper 14 facing the center of the boneless windshield wiper is provided with a second chamfer 15 to facilitate the sliding installation of the rubber strip 10. The clamping jaw stopper 14 and the closed end of the second sliding groove 12 form a third clamping groove 16, and the clamping hook 53 of the buckle 50 passes through the strip-shaped hole 21 on the elastic steel sheet 20 and is clamped in the third clamping groove 16.

[0054] In the prior design, the buckle is fixed with the side pressing steel sheet 40 through the clamping convex on the side of the side pressing steel sheet, and axial positioning is performed, which increases the complexity of the manufacturing process of the side pressing steel sheet and increases the manufacturing cost.

[0055] In addition, the wiper works in high temperature, severe cold, rain and snow, etc. Considering the different thermal expansion and contraction coefficients between materials, the existing wiper product usually reserves a certain axial matching gap between the side pressing steel sheet and the rubber strip to avoid the deformation of the wiper caused by thermal expansion and contraction, which affects the wiping effect.

[0056] In the prior design, the second sliding groove on the buckle and the rubber strip is slidingly arranged, please refer to Figure 11 In the traditional design, a first reserved gap S1 is arranged between the second clamping block 13 on the rubber strip 10 and the sidewall of the second clamping groove 41 on the side pressing steel sheet 40 to relieve the thermal expansion and contraction therebetween. Since the prior design adopts the buckle and the side pressing steel sheet 40 limiting structure, which is simplified as the elastic steel sheet and the side pressing steel sheet 40 fixed, the first axial movement distance between the rubber strip 10 and the elastic steel sheet is equal to the first reserved gap S1.

[0057] In the scheme of the present application, the clamping hook 53 of the buckle 50 is clamped into the third clamping groove 16 on the rubber strip 10 for limiting, and a second reserved gap S2 is arranged between the clamping hook 53 and the sidewall of the third clamping groove 16, and the second axial movement distance between the rubber strip 10 and the elastic steel sheet is equal to the second reserved gap S2. Since the length of the buckle 50 is much smaller than the length of the side pressing steel sheet 40, the second reserved gap S2 is much smaller than the first reserved gap S1, and the second axial movement distance between the rubber strip 10 and the elastic steel sheet is much smaller than the first axial movement distance. Therefore, the movement range between the rubber strip 10 and the elastic steel sheet 20 in the scheme of the present application is much smaller than that in the prior design, which reduces the axial movement range and reduces the noise generated when the wiper works.

[0058] As shown in Figure 8 The width of the closed end of the rubber strip 10 is greater than the width of the middle part, and the elastic clamping claw 52 is located inside the closed end of the rubber strip 10, and the outer side surface of the elastic clamping claw 52 does not protrude from the outer side surface of the closed end, and the closed end can protect the elastic clamping claw 52. At the same time, the closed end also plays an axial limiting role on the elastic clamping claw 52, which further improves the reliability. In addition, the width of the middle part of the rubber strip 10 is smaller than the width of the closed end, which also facilitates the clamping of the elastic clamping claw 52 into the third clamping groove 16.

[0059] In combination with the description of the above specific embodiments, the double-steel-sheet boneless wiper provided by the present application has the following advantages compared with the prior art:

[0060] First, the first clamping block on the elastic steel sheet and the first clamping groove in the sheath sliding groove constitute a double axial limiting structure of the sheath, the sheath stopper on the top wall of the sheath inner cavity and the barb on the buckle constitute a double axial limiting structure of the sheath, the double axial limiting structure can effectively prevent the sheath from slipping outwards, and the reliability is improved.

[0061] Second, the elastic clamping claw on the buckle passes through the elastic steel sheet and is directly clamped in the third clamping groove on the rubber strip, the rubber strip is not easy to loosen, and the use is reliable.

[0062] Third, the second reserved gap S2 between the clamping hook of the buckle and the third clamping groove on the rubber strip is much smaller than the first reserved gap S1 between the second clamping block on the rubber strip and the second clamping groove on the side pressing steel sheet, the axial movement range of the rubber strip is reduced, and the noise generated during work is reduced.

[0063] Finally, it should be noted that the terms "comprising", "including" or any other variation thereof used in this text are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0064] The present application is not limited to the above best embodiment, and anyone should know that any structural change made under the inspiration of the present application falls within the protection scope of the present application. Any technical solution with the same or similar technical solutions as the present application falls within the protection scope of the present application.

Claims

1. A double-steel-piece boneless wiper, comprising a rubber strip and a spring steel piece arranged on the top surface of the rubber strip, a sheath arranged on the spring steel piece, side-pressing steel pieces embedded on the two sides of the rubber strip respectively, and the two ends of the spring steel piece fixed on the top surface of the rubber strip by a buckle, characterized in that the buckle comprises a top plate, the top surface of the top plate is bent upwards on the side away from the center of the boneless wiper to form a barb, and the two side edges of the top plate extend downwards to form elastic clamping jaws, and the lower ends of the two elastic clamping jaws are oppositely bent to form clamping hooks; first clamping grooves are arranged on the two side edges of the end of the spring steel piece respectively, sheath sliding grooves are arranged on the two opposite inner walls of the inner cavity of the sheath respectively, first clamping blocks matching the first clamping grooves are arranged in the sheath sliding grooves, the spring steel piece is inserted into the sheath sliding grooves, and the first clamping blocks are clamped into the first clamping grooves to form a first axial limiting structure of the sheath; a sheath stopper is arranged on the outer end top wall of the inner cavity of the sheath, the sheath stopper is arranged corresponding to the barb, the first clamping blocks are located on the outer side of the buckle in the length direction, and the sheath stopper is in abutment with the barb to form a second axial limiting structure of the sheath; first sliding grooves and second sliding grooves are arranged on the two sides of the rubber strip from top to bottom respectively, the two ends of the first sliding grooves and the second sliding grooves are closed, the side-pressing steel pieces are arranged in the first sliding grooves, and a clamping jaw stopper is further arranged on the end of the second sliding groove, a third clamping groove is formed between the clamping jaw stopper and the closed end of the second sliding groove, and the clamping hooks are clamped in the third clamping groove through the spring steel piece. Second clamping grooves are arranged on the opposite side edges of the end of the side-pressing steel piece respectively, second clamping blocks matching the second clamping grooves are arranged in the first sliding grooves, the side-pressing steel pieces are inserted into the first sliding grooves, the second clamping blocks are clamped into the second clamping grooves, a first reserved gap is arranged between the second clamping blocks and the side walls of the second clamping grooves, a second reserved gap is arranged between the clamping hooks and the side walls of the third clamping groove, and the second reserved gap is smaller than the first reserved gap. The end of the spring steel piece is provided with two strip-shaped holes penetrating through the thickness direction of the spring steel piece, and the two strip-shaped holes are arranged side by side along the width direction of the spring steel piece, and the elastic clamping jaws are arranged corresponding to the two strip-shaped holes one by one. The end of the clamping hook away from the center of the boneless wiper is provided with a first chamfer. The end of the clamping jaw stopper towards the center of the boneless wiper is provided with a second chamfer.

2. The dual steel plate boneless wiper according to claim 1, characterized by, The side surfaces of the first clamping blocks and the sheath stopper towards the center of the boneless wiper are inclined surfaces.

3. The dual steel plate boneless wiper according to claim 1, characterized by, The sheath stopper is a U-shaped block, and the opening of the U-shaped block is arranged towards the center of the boneless wiper.

4. The dual steel plate boneless wiper according to claim 1, characterized by, The upper ends of the rubber strip are wider than the middle part.

5. The dual steel plate boneless wiper according to claim 1, wherein, ​ 6. The dual steel plate boneless wiper according to claim 1, wherein ​ 7. The dual steel plate boneless wiper according to claim 1, wherein ​ 8. The dual steel plate boneless wiper according to claim 1, wherein ​

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