Elastic supporting component suitable for boneless windshield wiper, flow guide sheath and boneless windshield wiper

Abstract

The elastic supporting component is prefabricated into a sheet-shaped body which extends in the length direction and has the bending curvature, and the elastic supporting component is sequentially provided with a constant-width section, a first sudden change area, a first outer side area and a first end portion area from inside to outside in the length direction from a stress center point O; the width equidistance of the constant-width section is W1, the maximum width of the first outer side area is W2, W1 is larger than W2, the first mutation area serves as a connecting section from the constant-width section to the first outer side area, and the position, located at the maximum width, of the first mutation area is defined as the high position of the first mutation area. The position, with the minimum width, of the first mutation region is defined as the low position of the first mutation region, the width of the high position of the first mutation region is equal to the width of the constant-width section, and the width of the low position of the first mutation region is equal to the maximum width W2 of the first outer side region; and the width of the elastic supporting part at any point in the first outer side area is less than or equal to the width W2 of the elastic supporting part at the low position in the first sudden change area.

Description

Technical Field

[0001] The present invention relates to a windshield wiper for wiping curved surface glass, and in particular to an elastic supporting component suitable for a boneless windshield wiper, a flow guide sleeve adapted to the elastic supporting component, and a boneless windshield wiper equipped with the elastic supporting component and the flow guide sleeve at the same time. Background Art

[0002] like Figure 1a to Figure 1b As shown, the elastic support component 1a' of the conventional boneless wiper is generally composed of two elastic sheets 11a' of equal width and parallel intervals. The two ends of the two elastic sheets 11a' are locked by welding connecting pieces (not shown) or by adding end buckles (not shown) to form an integral elastic support component 1a' prefabricated with a certain curvature. The problem caused by this is that due to manufacturing errors, the curvatures of the two elastic sheets 11a' are not completely consistent, which easily leads to uneven force on the rubber strip clamped therein at the same position along the width direction, affecting the wiping quality of the wiper; at the same time, the curvature of the elastic support component Although we try to make it as close as possible to the curvature of the windshield surface during prefabrication, the curvature of the windshield surface of each car model is different. Even on the same windshield surface, the curvature is not completely consistent. Generally, the curvature is the largest on both sides of the car window and the smallest in the middle (commonly known as relatively flat). In addition, since the elastic support component 1a' is designed with equal width, the size of the cross-sectional inertia moment is the same, and its two ends cannot be prefabricated into a curvature with a smaller radius of curvature (commonly known as the curvature of its two ends is relatively flat). Often, when the boneless wiper wipes the most arched area on the windshield surface, there is a suspended area G1 between its two ends K1 and the windshield surface S (such as Figure 1b As shown in the figure), the wiper cannot wipe away the rain on the windshield surface S located in the suspended area G1; furthermore, the raw materials and production equipment of the elastic support component have certain variables when making the finished product. Therefore, there will inevitably be a certain error between the actual curvature of the elastic support component actually manufactured and the theoretically assumed curvature. The above factors will have a substantial impact on the wiping quality of the boneless wiper.

[0003] Later, the industry developed an elastic support component (also known as steel sheet, elastic support sheet, frame) suitable for frameless wipers as disclosed in patent documents CN1091094A and CN216611149U. The elastic support component adopts the inventive concept of changing the moment of inertia of the cross-section from the middle section to both ends, thereby solving the technical problem that the rubber strips at both ends of the elastic support component are under weak force.

[0004] The technical path provided by patent document CN1091094A is to give a calculation formula to evenly reduce the thickness and width of the elastic support component from the middle section to the two ends. The patent document does not disclose in detail how the rubber strip (defined as a wiper in the patent document) is connected to the elastic support component. It only discloses in its specification that a connecting structure is provided on the elastic support component to ensure that the rubber strip is reliably connected to the elastic support component. Since the width of the elastic support component is not constant, the above structure cannot be adapted to a universal guide sleeve with a basically constant width. In addition, this technical path cannot directly open a through groove for passing the rubber strip on the midline of the elastic support component. At the same time, thinning the elastic support component will greatly increase the manufacturing cost.

[0005] Another patent document CN216611149U provides three different technical paths: the first technical path is to open a through groove on the elastic support component, and the width of the through groove gradually widens from the middle to the end; the second technical path is to gradually narrow the width of the elastic support component from the middle to the end; the third technical path is to gradually thin the thickness of the elastic support component from the middle to the end. In the specific implementation examples of the above three technical paths, the dimensions given are for 24-inch boneless wipers, and the width of its elastic support component is 7mm. Combined with the judgment of ordinary technicians in this field, the 24-inch boneless wiper needs to be equipped with two elastic support components that are spaced apart. The rubber strip is clamped between the two elastic support components, and the two ends of the two elastic support components are fixed with end buckles or welded connecting pieces (conventional technical means). The two elastic support components will also produce the aforementioned technical problem of inconsistent curvature. When the first technical path is adopted, since the elastic support component opens a through groove, and the width of the through groove is the largest at the end of the elastic support component, the part of the elastic support component adjacent to the rubber strip is too thin. It is long and is prone to twisting and deformation when clamping the rubber strip; when the second technical path is adopted, since the width of the two elastic support components gradually decreases from the middle section to the end section, it also faces the technical problem of being unable to adapt to the universal guide sleeve disclosed in the aforementioned patent document. At the same time, since the elastic support component gradually decreases from the middle section to the end section to form a seamless connection, it is very difficult to achieve the processing accuracy of the elastic support component in the width-contracting area. Once the central transverse axis of the elastic support component is not accurately aligned on the processing center axis reference line set by the laser cutting, it is easy to cause the laser to cut more on one side of the elastic support component and less on the other side; when the third technical path is adopted, the elastic support component is thinned from the middle section to the end section. As analyzed above, this will greatly increase the manufacturing cost.

[0006] Although the above patent document gradually reduces the size of the cross-sectional inertia moment of the elastic support component 1b' from the middle to the two ends, so that the bending curvature of the elastic support component 1b' at the two ends K1 and its adjacent areas can be easily processed to have a smaller curvature radius during prefabrication, which better solves the problem of the wiper not wiping cleanly at the two ends, but as described above, the curvature of the windshield surface S is not completely consistent, and it is flattest in the middle. When the wiper wipes the middle area of ​​the windshield (relatively flat area), the elastic support component 1b' is easily supported by the two groups of support fulcrums jointly constructed by the force center point O of the wiper joint assembly and the two ends K1, resulting in the elastic support component 1b' being easily arched in the middle area between the force center point O and the two ends K1, forming two arched portions G2 (such as Figure 1c As shown in the figure, the boneless wiper cannot completely fit with the windshield surface in the area located at the arched portion G2, which will also affect the wiper's cleanliness. Summary of the invention

[0007] The first object of the present invention is to provide an elastic supporting component suitable for a universal boneless wiper, through which the wiper rubber strip can be supported to better adaptively fit the windshield surface with different curvatures.

[0008] A second object of the present invention is to provide a flow guiding sleeve adapted to the elastic supporting component.

[0009] The third object of the present invention is to provide a universal boneless wiper with high scraping cleanliness, and the boneless wiper is equipped with the aforementioned elastic supporting component and guide sleeve at the same time.

[0010] To achieve the first objective of the present invention, the present invention discloses an elastic support component suitable for a boneless wiper, which is prefabricated into a sheet-like body extending in the length direction and having a bending curvature, the sheet-like body having a total length of L and a uniform thickness, a slit for clamping a rubber strip is provided at the central transverse axis position of the sheet-like body, and a flared portion for inserting and inserting the rubber strip into the slit is provided at one end of the slit or adjacent to the end, the elastic support component is divided into a front section and a rear section forward and backward along the length direction respectively with a vertical axis Y passing through a force center point O as a reference, the length of the front section is L1, the length of the rear section is L2, and L1+L2=L; The front section of the elastic support component is provided with a constant width section, a first mutation zone, a first outer region, and a first end region in sequence from the center point O of the force along the length direction from the inside to the outside, the width of the constant width section is equidistantly W1, the maximum width of the first outer region is W2, W1>W2, the first mutation zone is used as a connecting section from the constant width section to the first outer region, the first mutation zone is defined as the high position of the first mutation zone when it is located at the maximum width position, and the first mutation zone is defined as the low position of the first mutation zone when it is located at the minimum width position, the width of the high position of the first mutation zone is equal to the width of the constant width section, the width of the low position of the first mutation zone is equal to the maximum width of the first outer region W2, and the width of the elastic support component at any point located in the first outer region is ≤ the width W2 of the elastic support component at the low position of the first mutation zone; The rear section of the elastic supporting component is provided with a constant width section, a second mutation zone, a second outer area, and a second end area in sequence from the inside to the outside along the length direction from the force center point O. The width of the constant width section is equidistantly W1, and the maximum width of the second outer area is W2, W1>W2, and the second mutation zone serves as a connecting section from the constant width section to the second outer area. The second mutation zone is defined as a high position of the second mutation zone when it is located at the maximum width position, and is defined as a low position of the second mutation zone when it is located at the minimum width position. The width of the high position of the second mutation zone is equal to the width of the constant width section, and the width of the low position of the second mutation zone is equal to the maximum width of the second outer area, which is W2, and the width of the elastic supporting component at any point in the second outer area is ≤ the width W2 of the elastic supporting component at the low position of the second mutation zone.

[0011] The elastic supporting component manufactured by the above structure has a width of the elastic supporting component in the first outer region smaller than the width W1 of the constant width section, so that the cross-sectional inertia moment of the elastic supporting component on both sides of the constant width section is smaller than the cross-sectional inertia moment of the constant width section. Therefore, the elastic supporting component on both sides of the constant width section can be prefabricated into a curvature with a smaller curvature radius, so that the two ends of the elastic supporting component can be better adapted to the side of the windshield with a larger curvature radius. Moreover, because the first mutation zone and the second mutation zone are respectively arranged on both sides of the force center point of the elastic supporting component, and the first mutation zone and the second mutation zone are located at or adjacent to the region of the conventional elastic supporting component (without the first mutation zone and the second mutation zone) that is arched by the combined action of the force center point O and the two end fulcrums of the elastic supporting component (see Figure 1c), since the arc of the pre-bend of the elastic supporting component is a smooth transition, but the width in the first mutation zone suddenly narrows, resulting in a decrease in the unit force area of ​​this area, and an increase in the pushing force transmitted by the wiper arm per unit area, causing the elastic supporting component to sink in the first mutation zone to form an additional force fulcrum. Taking the front section of the elastic supporting component as an example, two smaller arched portions are formed between the end and the additional force fulcrum, and between the additional force fulcrum and the force center point, respectively, so that the gap between the arched portion of the elastic supporting component and the windshield surface is greatly reduced, which can greatly improve the cleanliness of the wiper.

[0012] In one embodiment, the front section of the elastic supporting component is arranged with equal width in the first outer region; and the rear section of the elastic supporting component is arranged with equal width in the second outer region.

[0013] In one embodiment, the width of the first outer region of the front section of the elastic supporting component gradually decreases from the inside to the outside along the length direction; and the width of the second outer region of the rear section of the elastic supporting component gradually decreases from the inside to the outside along the length direction.

[0014] In one embodiment, the front section and the rear section of the elastic support component are arranged with equal width in the first outer area and the second outer area respectively, and the first outer area and the second outer area respectively have a plurality of through holes with gradually larger hollow areas arranged side by side from the inside to the outside along the length direction.

[0015] To achieve the second purpose of the present invention, the present invention also discloses a guide sleeve adapted to any of the above-mentioned elastic support components, the guide sleeve is a long strip cover body, which has an outer contour for conforming to aerodynamics, so that the windshield wiper can significantly reduce the interference of wind resistance when wiping, and the inner cavity of the cover body is parallelly provided with two slide grooves for passing the elastic support component along the length direction, and the spacing between the two slide grooves corresponds to the width of the elastic support component and matches each other. With the above arrangement, it can be ensured that the guide sleeve is stably installed on the elastic support component.

[0016] To achieve the third purpose of the present invention, the present invention also discloses a boneless wiper configured with any one of the aforementioned elastic supporting components and the aforementioned guide sleeve. The boneless wiper has good compatibility, and the structure of its elastic supporting component can drive the wiper rubber strip to better adapt to the curved surface of the windshield of different vehicle models, thereby improving the scraping cleanliness of the boneless wiper. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The detailed description given as non-limiting examples better explains what the invention consists of and how it can be implemented, and furthermore, refers to the accompanying drawings, in which: Figure 1a A schematic diagram of a conventional two-piece elastic support member; Figure 1b Schematic diagram of the contact between the conventional elastic supporting components arranged with equal width and the surface of the windshield; Figure 1c Schematic diagram of the contact between the conventional elastic support component with a gradual change in the moment of inertia of the section and the surface of the windshield; Figure 2 Schematic diagram of the elastic supporting member of the present invention (first embodiment); Figure 3 Schematic diagram of the contact between the elastic support component of the present invention and the surface of the windshield; Figure 4a A schematic diagram of an elastic supporting member of the present invention (second embodiment); Figure 4b Schematic diagram of the size of the elastic support component of 18 inches (second embodiment); Figure 4c Schematic diagram of the size of the elastic support member of 24 inches (second embodiment); Figure 4d Schematic diagram of the elastic supporting member with connecting strips of the present invention (second embodiment); Figure 4e A schematic diagram of the elastic supporting member (sheet material) of the present invention being placed on a positioning fixture; Figures 4f-1 to 4f-3 Schematic diagram of contour cutting with different placements of conventional elastic support components; Figures 4g-1 to 4g-2 Schematic diagram of contour cutting of elastic support components of the present invention with different placements; Figure 5 A schematic diagram of an elastic supporting member of the present invention (third embodiment); Figure 6 A three-dimensional schematic diagram of the boneless wiper of the present invention; Figure 7 An exploded perspective schematic diagram of the boneless wiper of the present invention; Figure 8 A schematic longitudinal cross-sectional view of a boneless wiper of the present invention; Fig. 9 A schematic transverse cross-sectional view of the flow guide sheath of the present invention. DETAILED DESCRIPTION

[0018] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] The section inertia moment referred to in this specification is the inertia moment of the longitudinal section of any point of the elastic support component along the width direction relative to the central transverse axis X direction, which is used to measure the bending resistance of each longitudinal section of the elastic support component when the upper surface of the elastic support component is subjected to the downward pressure force.

[0020] The relative positions of the inside and outside of the elastic supporting component shall be based on the figures in the specification.

[0021] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] The first embodiment of the elastic supporting member 1a: like Figure 2 As shown, the present invention discloses an elastic support component 1a, which is prefabricated into a sheet-like body extending in the length direction and having a curvature. The total length of the sheet-like body is L, and the thickness is the same. A slit 11 for clamping the rubber strip 2 is provided at the center transverse axis X of the sheet-like body, and a flared portion 12 for inserting and passing the rubber strip 2 into the slit 11 is provided at one end of the slit 11 or adjacent to the end. In order to facilitate the passing of the rubber strip 2, the flared portions 12 are preferably provided at both ends of the elastic support component 1a in this embodiment. It is emphasized that the elastic support component 1a defined in the present invention is processed by using a complete sheet. Compared with the conventional solution of using two sheet-like bodies arranged side by side and fixing them at the ends by connecting pieces or end buckles, the elastic support component 1a of the present invention has the same curvature on both sides of the gap 11, so that the wiper rubber strip 2 clamped in the gap 11 can be more evenly stressed. At the same time, in order to increase the structural strength of the elastic support component 1a, connecting strips 15 (such as 1 / 4, 1 / 3, or other positions) can be provided in the middle section and / or at the gap 11. Figure 4d ), correspondingly, the wiper rubber strip 2 is provided with a clearance section at a position corresponding to the above-mentioned connecting strip 15 to meet the assembly requirements.

[0023] The elastic support component 1a is divided into a front section I and a rear section II along the length direction with the vertical axis Y passing through the force center point O as the reference. The length of the front section I is L1, and the length of the rear section II is L2, L1+L2=L. For the mainstream elastic support components 1a currently on the market, the front section I and the rear section II are mirror-set with the vertical axis Y passing through the force center point O as the reference, that is, the length of the front section I is the same as the length of the rear section II. Of course, in order to better adapt to the curvature of the windshield surface of a specific vehicle model, the industry may adjust the lengths of the front section I and the rear section II to be different, but this setting will not affect the development of this case described in detail later. In order to facilitate explanation, the front section I and the rear section II of the elastic supporting component 1a involved in the specific embodiment of the present invention are mirror-set with the vertical axis Y passing through the force center point O as the reference. Therefore, the following mainly describes in detail the structure of the front section I of the elastic supporting component 1a, and the structure and size setting range of the rear section II are the same as those of the front section I. More specifically, the structure of the front section I includes a constant-width section V, a first mutation zone III, a first outer area VI and a first end area VIII. Therefore, the structure and size setting range of the second mutation zone IV, the second outer area VII and the second end area IX are not repeated.

[0024] The front section I of the elastic supporting component 1a is provided with a constant width section V, a first mutation zone III, a first outer area VI, and a first end area VIII in sequence from the inside to the outside along the length direction from the force center point O. The width of the constant width section V is equidistantly W1, and the maximum width of the first outer area V1 is W2, W1>W2. The first mutation zone III serves as a connecting section from the constant width section V to the first outer area VI. In this embodiment, the width of the first mutation zone III decreases from the inside to the outside. The first mutation zone III is defined as the high position A of the first mutation zone III at the position with the maximum width, and is defined as the low position B of the first mutation zone III at the position with the minimum width. Of course, it is not excluded that the high position A and the low position B of the first mutation zone III are located on the same vertical straight line, that is, the high position A of the first mutation zone III The angle α between the line connecting the low position B and the central transverse axis X is 90 degrees; similarly, the rear section II of the elastic supporting component 1a is set with the second mutation zone IV at the mirror position of the first mutation zone III based on the vertical axis Y passing through the force center point O, and the elastic supporting component 1a is set with equal width in the first outer area VI and the second outer area VII, and the elastic supporting component 1a is set with equal width in the area between the high position of the first mutation zone III and the high position of the second mutation zone IV, and this area is defined as a constant width section V. Preferably, the high position of the first mutation zone III and the high position of the second mutation zone IV are both set with arc chamfers. The design of the arc chamfer makes it easier to scratch the chute of the guide sleeve when the guide sleeve is penetrated later; the width W1 of the high position A of the first mutation zone III The value range is ∈ [12mm 16mm]. Since the constant width section V and the first outer area VI are set with equal width, the width of the constant width section V is equal to the width W1 of the high position A of the first mutation area III, and the width of the first outer area VI is equal to the width W2 of the low position B of the first mutation area III; the width W1 of the high position A of the first mutation area III minus the width W2 of the low position B of the first mutation area III has a value range ∈ [0.5mm 3mm], the angle α between the line connecting the high position A of the first mutation zone III and the low position B of the first mutation zone III and the central transverse axis X has a value range of ∈ [10° 90°]. In an extreme case, the line connecting the high position A of the first mutation zone III and the low position B of the first mutation zone III are perpendicular to the central transverse axis X, that is, the first mutation zone III is not a surface but a line; more preferably, the width W1 of the high position A of the first mutation zone III minus the width W2 of the low position B of the first mutation zone III has a value range of ∈ [1mm 3mm], and the angle α between the line connecting the high position A of the first mutation zone III and the low position B of the first mutation zone III and the central transverse axis X has a value range of ∈ [45° 60°】, the angle α of the following three specific embodiments of the present invention is 45°; at the same time, it is preferably designed that the maximum width W4 of the first end region VIII is less than or equal to the minimum width W3 of the first outer region VI. Since the first outer region VI of this embodiment is set to be equal in width, its equal width setting continues to the first end region VIII, so the minimum width W3 of the first outer region VI is equal to the maximum width W4 of the first end region VIII and equal to the width W2 of the low position B of the first mutation zone III. The above settings can facilitate the insertion of the chute 31 of the guide sleeve 3 on the elastic support component 1a. .

[0025] At the same time, the length L3 from the force center point O of the elastic support component 1a to the high position A of the first mutation zone III will be adjusted accordingly according to the length of the elastic support component 1a. Specifically, when the length of the elastic support component 1a is 10 inches-19 inches, the value range of L3 is ½L1±30mm; when the length of the elastic support component 1a is greater than 19 inches, the value range of L3 is ½L1±50mm.

[0026] With the above design, since the width W2 of the elastic supporting component 1a in the first outer region VI is smaller than the width W1 of the constant width section V, the cross-sectional inertia moment of the elastic supporting component 1a in the first outer region VI is smaller than the cross-sectional inertia moment of the constant width section V, so that the elastic supporting component 1a in the first outer region VI can be prefabricated into a curvature with a smaller curvature radius, so that the two ends of the elastic supporting component 1a can be better adapted to the side of the windshield with a larger curvature radius. In addition, because the first mutation zone III and the second mutation zone IV are respectively arranged on both sides of the force center point of the elastic supporting component 1a, and the first mutation zone III and the second mutation zone IV are located at or adjacent to the arched portion G2 (such as Figure 1c), and because the size of the cross-sectional inertia moment from the high position of the first mutation zone III to the low position of the first mutation zone III drops sharply at a finite distance, that is, the width of the first mutation zone III suddenly narrows, resulting in a decrease in the unit force area of ​​this area, and an increase in the pressure per unit area, resulting in the elastic support component 1a forming an additional force fulcrum in the first mutation zone III, thereby forming two smaller arched portions G3 between the end of the elastic support component 1a and the additional force fulcrum, and between the additional force fulcrum and the force center point O, respectively, so that the elastic support component 1a is at the arched portion and the wind direction. The gap between the windshield surfaces is greatly reduced, which can greatly improve the fit between the rubber strip 2 installed under the elastic support component and the windshield surface S, greatly improving the cleanliness of the wiper; at the same time, due to the setting of the first mutation zone III and the second mutation zone IV, it can be guaranteed to the maximum extent that the size of the cross-sectional inertia moment corresponding to the constant width section V, the first mutation zone III, and the first outer area VI of the elastic support component 1a will not deviate from the predetermined design requirements, thereby ensuring that the elastic force of the elastic support component in each area meets the design requirements. For related explanations, please refer to the subsequent second embodiment.

[0027] Second embodiment of the elastic supporting member: like Figure 4a As shown, the main structure of the elastic supporting component 1b is basically the same as that of the first embodiment, which is also an integrated sheet-like body, and also has the settings of the first mutation zone III, the first outer area VI and the first end area VIII, except that the first outer area VI of the front section I of the elastic supporting component 1b1b gradually decreases in width from the inside to the outside along the length direction; the second outer area VII of the rear section II of the elastic supporting component 1b gradually decreases in width from the inside to the outside along the length direction; it is more preferably configured, and the minimum width W3 of the front section of the elastic supporting component 1b located in the first outer area VI is greater than or equal to the maximum width W4 located in the first end area VIII, the maximum width W4 is defined as the spacing between two horizontal tangent lines of the first end area VIII, the maximum width W4∈[8mm 12mm] of the first end area VIII, and the size settings of each area of ​​the elastic supporting component 1b are explained below by taking 18 inches and 24 inches as examples: like Figure 4b , 18-inch elastic supporting component 1b, where L=455mm, L3=111mm, W1=14mm, W2=12mm, W3=10.32mm, W4=10.19mm.

[0028] like Figure 4c , 24-inch elastic supporting component 1b, where L=605mm, L3=149mm, W1=14mm, W2=12mm, W3=10.24mm, W4=10.15mm.

[0029] Compared with the first embodiment, since the size of the cross-sectional inertia moment of the first outer region VI decreases successively along the length direction, the rigidity of this section area will gradually weaken from the inside to the outside along the length direction, and it is easier to be prefabricated into a curved arc with a smaller curvature radius, so that the end of the elastic support component 1b can better adapt to the curved surface of the windshield with a larger curved arc. At the same time, the technical effects achieved by the first mutation zone III and the second mutation zone IV are not essentially different from those of the first embodiment. It is necessary to explain in detail why the setting of the first mutation zone III and the second mutation zone IV can maximize the design requirements of the elastic inertia moment of each area, refer to Figure 4e to Figure 4g-2 The description of each figure shows that, taking the size of the elastic support component (spring) disclosed in the background "CN216611149U" as an example, a 7mm equal-width strip 1b' is generally used, which is pre-bent and then laser-cut into a shape with a gradually decreasing width. The theoretical width of the strip is 7mm. Due to the manufacturing tolerance, the actual width of the strip in the industry is between 6.8-7.0mm. Furthermore, there will be a certain lateral curvature in the width of the elastic support component. Therefore, the processing and positioning jig will be 0.2mm larger than the theoretical maximum width of 7mm to facilitate the processing operation. If automatic loading is used, a larger space such as 0.3-0.5mm must be reserved. Taking the random offset of the elastic support component within the positioning gap of 0.4mm as an example, Figure 4e The schematic diagram shows that the elastic supporting component 1b' (strip material) with an arc is placed on the positioning fixture of the laser cutting machine. Since there is no sudden change zone, the constant width section and the gradual change section are realized by tangent or smooth transition. Figure 4f-1 It is revealed that the central transverse axis X of the elastic support component 1b' (semi-finished product) is accurately aligned with the processing center axis reference line set by the laser cutting (not shown in the figure), so that the laser tool can accurately cut into the intersection point T for cutting, so as to successfully complete the processing of the width gradient area of ​​the outer area, and realize the gradual reduction of the moment of inertia from the inside to the outside; because there is a 0.4mm gap between the positioning block 5 and the elastic support component 1b' (semi-finished product), when the elastic support component 1b' (semi-finished product) is placed on the positioning fixture and is not aligned, if the elastic support component 1b' (semi-finished product) is offset clockwise upward, such as Figure 4f-2 As shown, the intersection point T between the laser cutting and the elastic supporting component 1b' (semi-finished product) will move forward, resulting in the length of the outer area being shortened and the end width of the outer area being increased by 3.2mm. If the elastic supporting component 1b' (semi-finished product) is offset counterclockwise downward, as shown in FIG. Figure 4f-3As shown, the intersection T between the laser cutting and the elastic support component 1b' (semi-finished product) will move backward, resulting in an increase in the length of the outer area and a reduction in the end width of the outer area to 2.8 mm. In actual production and manufacturing, it is normal that the elastic support component (strip material) 1b' cannot be accurately aligned. Therefore, the constant width section and the gradual section (outer area) of the elastic support component 1b' have a large deviation from the original theoretical design requirements, affecting the distribution requirements of the cross-sectional inertia moment of the elastic support component at various positions along the length direction, and ultimately resulting in the instability of the elastic force of the elastic support component. Excessive or insufficient elastic force will have a negative impact on the wiping quality of the wiper. Figure 4g-1 The schematic diagram shows that the elastic support component 1b is accurately positioned on the positioning fixture 5. When the laser cuts from the high position A of the first mutation zone III to the low position B, and then completes the processing of the first outer area VI with a gradually narrowing width from the inside to the outside, the spacing from the high position A to the low position B of the two first mutation zones III is 1mm, which is an ideal state. When the elastic support component 1b (semi-finished product) is offset clockwise upward, as shown in FIG. Figure 4g-2 As shown, when the laser is processing, the distance between the high position A and the low position B of the first mutation zone III located at the top will be expanded to 1.2 mm, and the distance between the high position A and the low position B of the first mutation zone III located at the bottom will be reduced to 0.8 mm, but the length and width of the constant width section V and the first outer area VI (gradient section) are basically the same as those in the ideal state. Obviously, through the design of the first mutation zone III and the second mutation zone IV, the offset due to the gap between the elastic support component (sheet material) and the positioning fixture can be effectively overcome, the processing accuracy can be effectively guaranteed, and it can be ensured that the distribution of the moment of inertia of each area of ​​the elastic support component can meet the design requirements of the present invention.

[0030] The third embodiment of the elastic supporting member: like Figure 5 The main structure of the elastic support component 1c is basically the same as that of the first embodiment, except that the elastic support component 1c is set with equal width in the first outer area VI and the second outer area VII, and a number of through holes 13 with gradually larger hollow areas are arranged side by side along the length direction from the inside to the outside in the above-mentioned areas. The through holes 13 are elliptical through holes or rectangular through holes. It is preferred to use elliptical through holes because elliptical through holes are less likely to form stress concentration than rectangular through holes, and the size of the hollow area can be increased by increasing the length of the major axis without changing the length of the minor axis of the ellipse, thereby maximizing the structural strength of the elastic support component 1c in the opening area; the value range of the constant width section width W1 and the value range of the width W2 of the elastic support component 1c in the first outer area VI can refer to the first embodiment and will not be repeated.

[0031] Compared with the first embodiment, since the hollow area of ​​the through hole 13 opened in the first outer area VI gradually increases from the inside to the outside, the length of the through hole 13 with the largest hollow area is used as the unit length of the cumulative value of the cumulative moment of inertia of the section, that is, the numerical value of the cumulative value of the moment of inertia of the section at each point along the length direction under this unit length decreases from the inside to the outside. The technical effect produced is basically the same as that of the second embodiment, that is, the stiffness of the elastic support component 1c in the opening area will gradually weaken from the inside to the outside along the length direction, making it easier to be prefabricated into a bending arc with a smaller curvature radius, which can make the end of the elastic support component 1c better adapt to the curved surface of the windshield with a larger bending arc. At the same time, the technical effects achieved by the first mutation zone III and the second mutation zone IV are not essentially different from those of the first embodiment and will not be repeated.

[0032] like Figures 6 to 9The present invention also discloses a boneless wiper 100, which includes a wiper connecting assembly 4, two guide sleeves 3 and a rubber strip 2, and any one of the aforementioned elastic supporting components 1a. The boneless wiper 100 takes the second embodiment of the elastic supporting component 1b as an example, and the two ends of the elastic supporting component 1b are respectively provided with a first limiting portion 14 for clamping the guide sleeve 3; the wiper connecting assembly 4 is fixedly arranged in the middle part of the elastic supporting component 1b, and serves as a transfer component between the elastic supporting component 1b and the wiper arm; the rubber strip 2 is inserted into the gap 11 of the elastic supporting component 1b through the flared portion 12; the guide sleeve 3 is a long strip cover body with an opening facing downward, one end of which is a closed end along the length direction, and the other end is an insertion end. The cover body has an outer contour that conforms to aerodynamics, and the left and right sides of the inner cavity of the cover body are provided with slide grooves 31 extending along its length direction, and the spacing between the two slide grooves 31 is the same as the elastic The width of the supporting component 1b is set one by one and matches each other. The above setting is obviously different from the conventional guide sleeve 3, because the spacing between the two slide grooves 31 of the conventional guide sleeve 3 is set to be equal in width, but the inner contour of the two slide grooves 31 in the guide sleeve 3 disclosed by the present invention is adapted to the outer contour shape and size of the elastic supporting component 1b, and is made by injection molding. At the same time, the slide groove 31 is provided with a matching portion 32 at a position relative to the first limiting portion 14 of the elastic supporting component 1b. The two slide grooves 31 of the guide sleeve 3 are respectively sleeved on both sides of the elastic supporting component 1b until the matching portion 32 of the guide sleeve 3 and the first limiting portion 14 of the elastic supporting component 1b are mutually engaged and limited, so that the guide sleeve 3 covers the section of the elastic supporting component 1b therein. Since the inner contour of the slide groove 31 of the guide sleeve 3 matches the outer contour of the elastic supporting component 1b, the two slide grooves 31 of the guide sleeve 3 When the guide sleeve is placed on the elastic support component 1b, the two will not produce relative shaking, so that the guide sleeve 3 is stably assembled on the elastic support component 1b. It should be supplemented that the guide sleeve 3 is not necessarily fixed on the elastic support component by a sleeve. The closed end of the guide sleeve 3 in this embodiment can also be changed to an open end, by adding end buckles (not shown) at both ends of the elastic support component 1b, when the two slide grooves 31 of the guide sleeve 3 are inserted into the two sides of the elastic support component 1b, the guide sleeve 3 is then limited between the end buckles and the wiper connecting assembly 4 along the length direction by the end buckles. The boneless wiper made of the above structure uses a newly designed elastic support component 1b and its matching guide sleeve 3. The elastic support component 1b can drive the rubber strip 2 to better fit the windshield surface with different curvatures, improve the cleanliness of the wiper, and meet the design requirements of the boneless wiper as a universal wiper.

[0033] The above embodiments and illustrations do not limit the product form and style of the present invention. Any appropriate changes and modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. An elastic supporting component suitable for a boneless wiper, characterized in that: It is prefabricated into a sheet-like body extending in the length direction and having a curvature, the sheet-like body having a total length of L and a uniform thickness, a slit (11) for clamping a rubber strip (2) is provided at the position of the central transverse axis (X) of the sheet-like body, a flared portion (12) for inserting the rubber strip (2) and passing through the slit (11) is provided at one end of the slit (11) or adjacent to the end, the elastic supporting component (1a, 1b, 1c) is divided into a front section (I) and a rear section (II) forward and backward along the length direction respectively with a vertical axis Y passing through a force center point O as a reference, the length of the front section (I) is L1, the length of the rear section (II) is L2, and L1+L2=L; The front section (I) of the elastic supporting component (1a, 1b, 1c) is provided with a constant width section (V), a first mutation zone (III), a first outer region (VI), and a first end region (VIII) in sequence from the inside to the outside along the length direction from the force center point O, the width of the constant width section (V) is equidistantly W1, the maximum width of the first outer region (V1) is W2, W1>W2, the first mutation zone (III) serves as a connecting section from the constant width section (V) to the first outer region (VI), and the first mutation zone (III) is located at the maximum width position and is defined as the high position of the first mutation zone (III). (A), the first mutation zone (III) at the position with the smallest width is defined as the low position (B) of the first mutation zone (III), the width of the high position (A) of the first mutation zone (III) is equal to the width of the constant width section (V), the width of the low position (B) of the first mutation zone (III) is equal to the maximum width W2 of the first outer region (V1), and the width of the elastic supporting component (1a, 1b, 1c) at any point located in the first outer region (VI) is ≤ the width W2 of the elastic supporting component (1a, 1b, 1c) at the low position (B) of the first mutation zone (III); The rear section (II) of the elastic supporting component (1a, 1b, 1c) is provided with a constant width section (V), a second mutation zone (IV), a second outer region (VII), and a second end region (IX) in sequence from the inside to the outside along the length direction from the force center point O, the width of the constant width section (V) is equidistantly W1, the maximum width of the second outer region (VII) is W2, W1>W2, the second mutation zone (IV) serves as a connecting section from the constant width section (V) to the second outer region (VII), and the second mutation zone (IV) is located at the maximum width position and is defined as the high position ( A'), the second mutation zone (IV) at the position with the smallest width is defined as the low position (B') of the second mutation zone (IV), the width of the high position (A') of the second mutation zone (IV) is equal to the width of the constant width section (V), the width of the low position (B') of the second mutation zone (IV) is equal to the maximum width W2 of the second outer region (VII), and the width of the elastic supporting component (1a, 1b, 1c) at any point in the second outer region (VII) is ≤ the width W2 of the elastic supporting component (1a, 1b, 1c) at the low position (B) of the second mutation zone (IV).

2. The elastic supporting member according to claim 1, characterized in that: When the length of the elastic support member (1a, 1b, 1c) is 10 inches to 19 inches, the length L3 from the high position (A) of the first mutation zone (III) to the force center point O has a value range of ½L1±30mm; the length L4 from the high position (A') of the second mutation zone (IV) to the force center point O has a value range of ½L2±30mm; When the length of the elastic supporting component (1a, 1b, 1c) is greater than 19 inches, the length L3 from the high position (A) of the first mutation zone (III) to the force center point O has a value range of ½L1±50mm; the length L4 from the high position (A') of the second mutation zone (IV) to the force center point O has a value range of ½L2±50mm.

3. The elastic supporting member according to claim 2, characterized in that: The length L3 from the high position (A) of the first mutation zone (III) to the force center point O is ≥60 mm, and the length L4 from the high position (A') of the second mutation zone (IV) to the force center point O is ≥60 mm.

4. The elastic supporting member according to claim 1, characterized in that: The high position (A) of the first mutation region (III) and the high position (A') of the second mutation region (IV) are both arranged with arc chamfers.

5. The elastic supporting member according to any one of claims 1 to 4, characterized in that: The width W1 of the high position (A) of the first mutation zone (III) has a value range of ∈ [12mm 16mm], the width W1 of the high position (A) of the first mutation zone (III) minus the width W2 of the low position (B) of the first mutation zone (III) has a value range of ∈ [0.5mm 3mm], and the angle α between the line connecting the high position (A) of the first mutation zone (III) and the low position (B) of the first mutation zone (III) and the central transverse axis (X) has a value range of ∈ [10° 90°]; The width W1 of the high position (A') of the second mutation zone (IV) has a value range of ∈ [12mm 16mm], the width W1 of the high position (A') of the second mutation zone (IV) minus the width W2 of the low position (B') of the second mutation zone (IV) has a value range of ∈ [0.5mm3mm], and the angle α between the line connecting the high position (A') of the second mutation zone (IV) and the low position (B') of the second mutation zone (IV) and the central transverse axis (X) has a value range of ∈ [10° 90°].

6. The elastic supporting member according to claim 5, characterized in that: The width W1 of the high position (A) of the first mutation zone (III) minus the width W2 of the low position (B) of the first mutation zone (III) has a value range of ∈ [1mm 3mm], and the angle α between the line connecting the high position (A) of the first mutation zone (III) and the low position (B) of the first mutation zone (III) and the central transverse axis (X) has a value range of ∈ [45° 60°]; The value range of the width W1 of the high position (A') of the second mutation zone (IV) minus the width W2 of the low position (B') of the second mutation zone (IV) is ∈ [1mm 3mm], and the value range of the angle α between the line connecting the high position (A') of the second mutation zone (IV) and the low position (B') of the second mutation zone (IV) and the central transverse axis (X) is ∈ [45° 60°].

7. The elastic supporting member according to any one of claims 1 to 6, characterized in that: The front section (I) and the rear section (II) are mirror-imaged with respect to a vertical axis (Y) passing through the force center point O.

8. The elastic supporting member according to any one of claims 1 to 7, characterized in that: The width of the first outer region (VI) of the front section (I) of the elastic supporting component (1a) is set to be equal to the width W2 of the low position (B) of the first mutation zone (III); the width of the second outer region (VII) of the rear section (II) of the elastic supporting component (1a) is set to be equal to the width of the low position (B') of the second mutation zone (IV).

9. The elastic supporting member according to any one of claims 1 to 7, characterized in that: The first outer region (VI) of the front section (I) of the elastic supporting component (1b) gradually decreases in width from inside to outside along the length direction; the second outer region (VII) of the rear section (II) of the elastic supporting component (1b) gradually decreases in width from inside to outside along the length direction.

10. The elastic supporting member according to any one of claims 1 to 7, characterized in that: The front section (I) and the rear section (II) of the elastic support component (1c) are arranged with equal width in the first outer region (VI) and the second outer region (VII), respectively. The first outer region (VI) and the second outer region (VII) are respectively provided with a plurality of through holes (13) with gradually larger hollow areas arranged side by side from the inside to the outside along the length direction.

11. The elastic supporting member according to claim 10, characterized in that: The through hole (13) is an elliptical through hole or a rectangular through hole.

12. The elastic supporting member according to any one of claims 8 to 11, characterized in that : The maximum width W4 of the first end region (VIII) is less than or equal to the minimum width W3 of the first outer region (VI); the maximum width W4 of the second end region (IX) is less than or equal to the minimum width W3 of the second outer region (VII).

13. A guide sleeve (3) adapted to the elastic support member as claimed in any one of claims 1 to 12, the guide sleeve (3) being a long strip-shaped cover having an outer contour conforming to aerodynamics, so that the wind resistance interference of the wiper can be significantly reduced when wiping, and the inner cavity of the cover is provided with two parallel sliding grooves (31) for passing the elastic support member along the length direction, characterized in that: The spacing between the two slide grooves (31) corresponds to the width of the elastic support components (1a, 1b, 1c) and matches each other.

14. A boneless wiper, characterized in that: The configuration comprises an elastic supporting component (1a, 1b, 1c) as claimed in any one of claims 1 to 12 and a flow guiding sleeve (3) as claimed in claim 13.

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