Adapter and windshield wiper thereof

Abstract

The adapter comprises a shell which is formed by two side walls and a connecting wall transversely arranged between the two side walls, the bottom end of the shell is open, an inner cavity of the shell is hollow, a nesting block is fixedly arranged in the inner cavity of the shell, and a matching part which abuts against an arc face of the upper portion of a pivot joint shaft is arranged in a pivot joint groove. The matching portion of the pivot joint groove is rotatably arranged on a pivot joint shaft of the windshield wiper connecting base in a sleeved mode through the limiting opening end, a back-hooking portion extending towards the front end is formed at the rear end, opposite to the arc face of the lower portion of the pivot joint shaft, of the pivot joint groove, the second end is made to be arranged on the back-hooking portion, and the height of the first end is larger than that of the second end. The vertical line passing through the central point of the connecting line of the first end N1 and the second end N2 is positioned at the front end passing through the vertical line of the pivot shaft circle center O2 along the vertical direction, so that the limiting opening end is deviated towards the front end; the opening is located below the limiting opening end to form a guide part, and the guide part is used for guiding the pivot joint shaft to the limiting opening end.

Description

Technical Field

[0001] The present invention relates to the field of automotive parts, and more particularly to an adapter having a specific pivot slot and a wiper with such an adapter. Background Art

[0002] CN105253107A discloses a pivot connection structure established between an adapter 2A and a pivot shaft 142' in a wiper connection base 1c. It should be noted that the wiper connection base 1c is not made of a metal material. As Figures 1-8 to 1-9 shown, a nested portion 22A for inserting between two longitudinal vertical walls 141' of the wiper connection base 1c is formed in the pivot slot of the adapter 2A'. A pivot slot (originally a rotation shaft slot) 221A is provided in the nested portion 22A. The pivot slot 221A covers at least the area above the center diameter of the pivot shaft 142', that is, the pivot slot 221A covers at least more than half of the area of the pivot shaft 142', so that the distance between the open ends of the pivot slot 221A is less than the diameter of the pivot shaft 142', thereby reducing the probability of the adapter 2A' disengaging from the pivot shaft 142'. A more preferable design is, as Figure 1-10 shown, a raised clamping point 76' is provided at the open end of the pivot slot 75' (equivalent to the center clamping position in the original text) of the adapter 71', which can further reduce the probability of the adapter 71' disengaging from the pivot shaft 13a (as Figure 1-2 ). However, with such a design, when installing the adapter 2A (71') onto the pivot shaft 142' (13a), it is necessary to press down the adapter 2A (71') forcefully, and it can be assembled by the reaction force applied to the open end of the pivot slot 221A (75') by the pivot shaft 142' (13a) to expand it, which has a certain assembly difficulty. In view of this, the inventor of the present invention has conducted in-depth research on the above-mentioned defects in the prior art, and thus this case has been created. Summary of the Invention

[0003] The first object of the present invention is to provide an adapter for installing on a wiper connection base configured with a pivot shaft. Using this type of adapter, it is very convenient to install it with the wiper connection base, and when the wiper arm is in a normal working state, the adapter is not easily disengaged from the wiper connection base.

[0004] The second object of the present invention is to provide a wiper configured with the above-mentioned adapter.

[0005] To achieve the first object of the present invention, the present invention discloses an adapter, which serves as an intermediate connecting member for establishing a pivotal connection relationship between the wiper connection base and the wiper arm; the wiper connection base at least includes two longitudinal vertical walls and a pivot shaft horizontally disposed between the two longitudinal vertical walls; the adapter includes two side walls and a connection wall horizontally disposed between the two side walls to form a housing with an open bottom and a hollow inner cavity, and the nested block is fixedly arranged in the inner cavity of the housing, and an insertion space for inserting the corresponding longitudinal vertical wall is formed between it and the opposite side wall, so that the nested block is inserted between the two longitudinal vertical walls of the wiper connection base. A pivot groove with an opening facing downwards is provided on the nested block, and a matching portion that abuts against the upper arc surface of the pivot shaft is provided in the pivot groove. The two ends of the opening for abutting against the contact surface of the pivot shaft are defined as limit opening ends, and the limit opening ends are respectively defined as a first end and a second end from front to back. The distance L1 between the first end and the second end is less than the diameter D of the pivot shaft. The matching portion of the pivot groove is rotatably sleeved on the pivot shaft through the limit opening end. The pivot groove forms a hook portion extending towards the front end at the rear end relative to the lower arc surface of the pivot shaft, so that the second end is arranged in the hook portion, and the height of the first end is higher than that of the second end. The perpendicular bisector Y1 of the horizontal line connecting the first end and the second end is located in front of the vertical line Y2 passing through the center of the pivot shaft, so that the limit opening end is offset towards the front end; an opening is formed below the limit opening end to form a guiding portion, and the guiding portion is used to guide the pivot shaft to the limit opening end.

[0006] With the above structure, when it is necessary to detach the adapter from the pivot shaft of the wiper connection base, it can be achieved by simply tilting the front end of the adapter upwards and applying a certain force; when the wiper is in the working state, since the wiper arm is connected to the wiper connection base through the adapter, the adapter is often subjected to the pushing force of the wiper arm, resulting in the lower swing of its front end. Since the present invention creatively offsets the limit opening end towards the front end, unless the hook portion is subjected to a large force resulting in plastic deformation, such as a very large force causing the hook portion to be violently damaged, otherwise the adapter cannot be detached from the pivot shaft, ensuring the stable connection between the adapter and the wiper connection base.

[0007] To achieve the second object of the present invention, the present invention discloses a wiper, which includes a wiper bracket assembly and a wiper connection base. The wiper connection base at least includes two longitudinal vertical walls and a pivot shaft horizontally disposed between the two longitudinal vertical walls, and is fixedly arranged on the wiper bracket assembly. It includes the aforementioned adapter, and the adapter is pivotally connected and matched with the pivot shaft through the pivot groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The following specific description given as a non-limiting example better explains what the present invention includes and how it can be implemented. In addition, this description refers to the accompanying drawings, in which: Figure 1-1 Schematic diagram of a conventional windshield wiper Figure 1-2 Conventional windshield wiper connecting base (zinc alloy) Figures 1-3 to 1-4 Conventional windshield wiper connecting base (sheet metal part) Figure 1-5 is Figure 1-3 Bottom view of the windshield wiper connecting base Figure 1-6 Schematic diagram of a hook-shaped wiper arm Figure 1-7 Schematic diagram of a sliding cover type wiper arm Figure 1-8 Schematic diagram of the conventional windshield wiper connecting base of CN105253107A Figure 1-9 Schematic diagram of a conventional adapter for the rotating shaft connecting part adapted to the pivot shaft Figure 1-10 Schematic diagram of another conventional adapter for the rotating shaft connecting part adapted to the pivot shaft Figure 2-1 Schematic diagram of the first embodiment of the windshield wiper connecting base of the present invention (without pivot shaft) (counterbore) Figure 2-2 Schematic diagram of the first embodiment of the windshield wiper connecting base of the present invention (without pivot shaft) (U-shaped counterbore) Figure 2-3 Schematic diagram of the first embodiment of the windshield wiper connecting base of the present invention (counterbore) Figure 2-4 is Figure 2-3 Longitudinal sectional view along the width direction Figure 3-1 Exploded view of the parts for installing the first adapter on the windshield wiper connecting base of the present invention Figure 3-2 Reference diagram of the assembled state of the first adapter of the present invention (flap open) Figure 3-3 Bottom view of the base of the first adapter of the present invention Figure 3-4 Stereogram of the base of the first adapter of the present invention installed on the windshield wiper connecting base Figure 3-5 Cross-sectional view of the base of the first adapter of the present invention along the length direction Figure 3-6 Cross-sectional view of the base of the first adapter of the present invention installed on the windshield wiper connecting base along the length direction Figure 3-7 Cross-sectional view of the base of the first adapter of the present invention installed on the windshield wiper connecting base along the length direction (at another angle) Figure 3-8Assembly schematic diagram of the first type of hook-shaped wiper arm, the first adapter and the wiper connection base of the present invention; Figure 3-9 The present invention is Figure 3-8 bottom view; Figure 3-10 For the present invention Figure 3-8 Cross-sectional view along the width direction; Figure 3-11 Bottom view of the present invention when installing the second type of hook-shaped wiper arm; Figure 4-1 Exploded view of the parts of the wiper connection base of the present invention when installing the second adapter; Figure 4-2 Three-dimensional view of the nested block of the second adapter of the present invention; Figure 4-3 Schematic diagram of the nested block of the second adapter of the present invention installed on the wiper connection base; Figure 4-4 For Figure 4-3 Schematic diagram of installing the sliding cover type wiper arm; Figure 4-5 Front view of the sliding cover type wiper arm and the wiper connection base; Figure 4-6 For Figure 4-3 Cross-sectional view along the length direction; Figure 5-1 Schematic diagram of the second embodiment of the wiper connection base of the present invention; Figure 5-2 Schematic diagram for explaining the notch design of the wiper connection base of the present invention; Figure 5-3 Exploded view of the parts of the second embodiment of the wiper connection base, the third adapter and the side-inserted wiper arm of the present invention; Figure 5-4 Three-dimensional view of the third adapter of the present invention in a flipped state; Figure 5-5 Front perspective view of the second embodiment of the wiper connection base of the present invention installed on the third adapter; Figure 5-6 For Figure 5-5 Longitudinal cross-sectional view along the length direction; Figure 5-7 Assembly schematic diagram of the first type of side-inserted wiper arm and the third adapter of the present invention; Figure 5-8 Exploded schematic diagram of the parts for installing the second type of side-inserted wiper arm of the present invention; Figure 5-9 Assembly schematic diagram of the second type of side-inserted wiper arm and the third adapter of the present invention; Figure 6-1 Exploded view of the parts of the third embodiment of the wiper connection base, the fourth adapter and the U-shaped groove wiper arm of the present invention; Figure 6-2 is Figure 6-1 the assembly schematic diagram of; Figures 6-3 to 6-5 is the structural schematic diagram of different embodiments of the fourth adapter nesting block of the present invention; Figures 6-6 to 6-9 is the structural schematic diagram of different embodiments of the fourth adapter pivot slot of the invention; Figure 6-10 is the longitudinal sectional view (horizontal state) of the pivot slot of the best embodiment of the fourth adapter configuration of the invention; Figure 6-11 is the longitudinal sectional view (reclined state) of the pivot slot of the best embodiment of the fourth adapter configuration of the invention; Figures 6-12 to 6-13 is the enlarged view of the force deformation when the pivot slot of the best embodiment of the fourth adapter configuration of the present invention is in the reclined state; Figure 6-14 is the schematic diagram of the too long hook-back part of the pivot slot of the fourth adapter of the invention; Figure 6-15 is the longitudinal sectional view (forward reclined state) of the pivot slot of the best embodiment of the fourth adapter configuration of the invention; Figure 6-16 is the front view of the fourth adapter of the present invention in the horizontal state; Figure 6-17 reveals the schematic diagram of opening the process hole on the side wall of the injection-molded pivot slot of the fourth adapter of the present invention; Figure 7 The fourth embodiment of the wiper connection base of the present invention. Detailed implementation manners

[0009] The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.

[0010] Such as Figures 2-1 to 2-4, the present invention discloses a wiper connection base 1a, which is made of cold-rolled sheet through sheet metal processing. It includes a fixing part 11, two vertical walls and a rivet A. The fixing part 11 is used to fixedly connect with the rigid part of the wiper bracket assembly. The wiper bracket assembly disclosed in this embodiment is a boneless wiper bracket assembly. Therefore, the rigid part of the wiper bracket assembly is the elastic pieces arranged on both sides of the wiper rubber strip. The fixing part 11 includes a support plate 111 and claw parts 112 arranged at the lower parts on both sides of the front and rear ends of the support plate 111. The fixing part 11 is fixedly connected with the elastic piece through the mutual fixation of the claw part 112 and the elastic piece. Of course, if the wiper bracket assembly is a boned wiper bracket assembly, those of ordinary skill in the art can adaptively adjust the structure of the fixing part to meet its fixation with the boned wiper bracket. The two longitudinal vertical walls 12 are vertically and spaced apart above the support plate 111, and through holes 121 for the rivet A to pass through and be riveted are respectively opened on the two longitudinal vertical walls 12. At least a settlement part 122 is arranged around the through hole 121 on the side of the rivet head A1. The settlement part 122 can at least partially accommodate the rivet head A1, thereby reducing the distance between the outermost protruding surfaces of the outer walls of the two longitudinal vertical walls 12. On the premise that the distance between the inner walls of the two longitudinal vertical walls 12 is limited, the above design is beneficial to increasing the design space of the thickness of the longitudinal vertical walls 12. Preferably, the settlement part 122 can be processed into a U-shaped sunk groove 122b (such as Figure 2-2 ), but preferably processed into a counterbore 122a (such as Figure 2-1 ), because in this way, during the riveting process of the rivet A, the rivet head A1 can be extruded and filled into the counterbore 122a area, making the joint between the settlement part 122 and the outer wall surfaces of the two longitudinal vertical walls 12 not obvious. More preferably, the peripheries of the two through holes 121 are all processed into counterbores 122a. On the one hand, each counterbore 122a has sufficient depth to at least partially accommodate the rivet head A1 and the flange A2 formed at the end of the rivet A, further increasing the design space of the thickness of the two longitudinal vertical walls 12. The rivet A passes through the through hole 121 and is riveted. Preferably, a solid rivet A is used, and the rivet A is riveted between the two longitudinal vertical walls 12 by a spin riveting process to form a pivot shaft 13. Compared with the pivot shaft 13 made of a hollow rivet A and a pivot shaft 13 made by a stamping riveting process, the pivot shaft 13 made of a solid rivet A has greater strength. The following description of the adaptation of the wiper connection base 1a to the hook-type wiper arm 100a and the sliding cover-type wiper arm 100b through different adapters is used to further illustrate that the present invention overcomes the traditional technical prejudice in the art by designing the settlement part 122 around the through hole 121 on the wiper connection base 1a, so that the improved wiper connection base 1a can be adapted to the hook-type wiper arms 100a, 100a' and the sliding cover-type wiper arm 100b at the same time.

[0011] Such as Figures 3-1 to 3-11, the present invention discloses a first adapter 2a for adapting a hook-type wiper arm 100a. The first adapter 2a includes a base 21a and a flip cover 22a. The base 21a includes two side walls 211a and a positioning block 3a disposed between the two side walls 211a. The upper and lower surfaces of the positioning block 3a are provided with an upper fixing surface 301a and a lower fixing surface 302a for matching with the inner contour surface of the hook portion of the hook-type wiper arm 100a. And a pivot groove 31 for pivotally cooperating with the pivot shaft 13 is provided on the positioning block 3a. The pivot groove 31 can adopt the technical solution disclosed in the background art, but the pivot groove 31 disclosed in this embodiment adopts a new design, such as Figure 3-5 shown. For a detailed description, reference can be made to the structural description of the pivot groove 31 in the fourth adapter later. It should be emphasized that the structure of the pivot groove 31 of the first adapter 2a lacks the design of the guiding portion compared with the structure of the fourth pivot groove 31 later, because the setting of the guiding portion will interfere with the lower fixing surface 302a of the positioning block 3a. In short, with the pivot groove 31 designed in this way, when the first adapter 2a is in a state of being upturned at the front end relative to the support plate 111 of the wiper connection base 1a, the user can easily detach the first adapter 2a from the pivot shaft 13 of the wiper connection base 1a. And when the first adapter 2a is in a horizontal or front-end downward swing state relative to the support plate 111 of the wiper connection base 1a, it is very difficult for the first adapter 2a to be separated from the pivot shaft 13, thereby ensuring the stability of the connection between the first adapter 2a and the wiper connection base 1a.

[0012] A gap is formed between each of the side walls 211a and the positioning block 3a, and the gap serves as a slot S for inserting the longitudinal wall 12. Each of the side walls 211a is respectively provided with a first elastic cantilever 51a and a second elastic cantilever 52a extending from top to bottom along the length direction at the front end of the positioning block 3a. Preferably, the second elastic cantilever 52a is arranged at the outer end of the first elastic cantilever 51a; a stopper 511a is arranged on the inner wall side of each of the first elastic cantilever 51a, and the stopper 511a is used to limit the displacement of the hook-type scraper arm 100a in the direction of leaving the positioning block 3a. Of course, since the first elastic cantilever 51a itself will open outward and produce elastic deformation when subjected to the extrusion force along the width direction, if the hook-type The force exerted on the scraper arm 100a when displacing in the direction of the stopper 511a is large enough that the two side surfaces at the front end of the hook scraper arm 100a will come into contact with the stopper 511a, pushing the two first elastic cantilevers 51a outward, thereby escaping from the obstruction of the stopper 511a. Preferably, a first inclined surface 5111a and a second inclined surface 5112a are respectively provided at the front end and the rear end of the stopper 511a, wherein the first inclined surface 5111a facilitates the hook scraper arm 100a to slide into the positioning block 3a during installation, and the second inclined surface 5112a is used to adaptively adjust the matching clearance between the first elastic cantilever 51a and the head of the hook scraper arm 100a; a block 521a is convexly provided on the outer wall side of each second elastic cantilever 52a, so that the block 52 1a forms a horizontal abutment surface 5211a at the bottom end; the flip cover 22a includes a top wall 221a and two side walls 222a which together form a cover structure with a hollow inner cavity opening facing downward, a hollow portion 2211a is provided on the top wall 221a, and the flip cover 22a can be hingedly arranged at the rear end of the base 21a, and the two side walls 222a are respectively provided with a protrusion 2212a at a position relative to the stopper 511a, and a hook 223a is respectively provided at a position relative to the clamping block 521a, and the closing of the flip cover 22a and the base 21a is achieved by the mutual engagement and clamping of the hook 223a and the horizontal abutment surface 5211a of the clamping block 521a, at which time the protrusion 521a of the flip cover 22a presses against the first The elastic cantilever 51a is located in the area of ​​the stopper 511a, and is used to limit the first elastic cantilever 51a from being stretched outward when subjected to force. It should be noted that since there is a basically horizontal engaging surface between the block 521a and the hook 223a, the flip cover 22a is difficult to be opened in the vertical direction relative to the base 21a. However, when external force is applied to the second elastic cantilever 52a, causing it to bend inward and deform, the block 521a on the second elastic cantilever 52a and the hook 223a at the flip cover 22a are disengaged from each other, thereby achieving unlocking between the flip cover 22a and the base 21a. The above arrangement can better ensure that when the flip cover 22a and the base 21a are in a closed state, the two are not easy to disengage from each other.In a more optimal design, an insurance block 224a is additionally provided downward at the inner end face of the front end of the top wall 221a of the flip cover 22a. The insurance block 224a is arranged at the front end of the stop block 511a of the first elastic cantilever 51a, and is used to secondarily limit the hook-type wiper arm 100a from disengaging in a direction away from the positioning block 3a, further enhancing the stability of the connection between the hook-type wiper arm 100a and the first adapter 2a. It should be emphasized that in the present invention, the first elastic cantilever 51a and the second elastic cantilever 52a are arranged vertically and staggeredly along the length direction of the side wall 211a, avoiding the mutual interference caused by the elastic deformation of the first elastic cantilever 51a and the second elastic cantilever 52a in the width direction, and effectively reducing the length and width of the first adapter 2a.

[0013] Preferably, in order to enable the first adapter 2a to be adapted to two different types of hook-type wiper arms 100a and 100a', that is, the distance between the upper leg 101a and the lower leg 102a of the first type of hook-type wiper arm 100a is shorter, and the length of the lower leg 102a is shorter, while compared with the first type of hook-type wiper arm 100a, the second type of hook-type wiper arm 100a' has a longer distance between its upper leg and the lower leg 102a', and the length of the lower leg 102a' is longer. Therefore, the lower fixing surface 302a of the positioning block 3a can be arranged in a stepped structure that rises from low to high from front to back, that is, the thickness of the middle front part of the positioning block 3a matches the distance between the upper leg 101a and the lower leg 102a of the first type of hook-type wiper arm 100a, so that the upper fixing surface 301a and the middle front part of the lower fixing surface 302a of the positioning block 3a can respectively abut against the inner walls of the upper leg 101a and the lower leg 102a of the first type of hook-type wiper arm 100a; the thickness of the rear part of the positioning block 3a matches the distance between the upper leg 101a' and the lower leg 102a' of the second type of hook-type wiper arm 100a', so that the upper fixing surface 301a and the rear part of the lower fixing surface 302a of the positioning block 3a can respectively abut against the inner walls of the upper leg 101a' and the lower leg 102a' of the second type of hook-type wiper arm 100a'; in a more optimal design, each side wall 211a respectively extends at least one limiting block 212a inward in the rear area of the lower fixing surface 302a of the positioning block 3a, preferably two limiting blocks 212a are arranged at intervals in the front and rear. The limiting block 212a is used to abut against the two wings on both sides of the lower leg 102a' of the second hook-type wiper arm 100a'. Because the length of the lower leg 102a' of the second type of hook-type wiper arm 100a' is longer, the addition of two limiting blocks 212a can limit its swing in the width direction relative to the first adapter 2a, enhancing the stability of the connection between the two. At the same time, the mutual interference between the limiting block 212a at the front end and the opposite surface of the longitudinal vertical wall 12 of the wiper connection base 1a can also be used to limit the upward tilting angle of the front end of the first adapter 2a (such as Figure 3-6 、 Figure 3-7 )

[0014] In the preferred design, since the positioning block 3a is provided with a pivot groove 31 with an opening facing downward, in order to prevent the limiting opening end of the pivot groove 31 from being easily spread open when stressed, resulting in the accidental detachment of the pivot shaft 13 from the pivot groove 31, two connecting rib strips 24a arranged at intervals are added between the positioning block 3a and the side wall 211a, making the side wall 211a an auxiliary support piece for the positioning block 3a. In this embodiment, the connecting rib strip 24a located at the rear end shares the same part with the aforementioned limiting block 212a located at the front end.

[0015] Taking the assembly of the first hook-type wiper arm 100a to the first adapter 2a as an example, first, the pivot groove 31 of the first adapter 2a is sleeved on the pivot shaft 13 of the wiper connection base 1a in a pivoting manner. At this time, the two slots S of the first adapter 2a insert the two longitudinal vertical walls 12 of the wiper connection base 1a thereinto with a gap, and the flip cover 22a is in an open state. Then, the hook-shaped part of the first hook-type wiper arm 100a is inserted through the hollow part 2211a of the flip cover 22a, and overcoming the block 511a of the first elastic cantilever 51a of the first adapter 2a, it is rotatably supported on the positioning block 3a, that is, the upper leg 101a and the lower leg 102a of the first hook-type wiper arm 100a respectively abut and cooperate with the upper fixing surface 301a and the lower fixing surface 302a in the middle front part of the positioning block 3a. At this time, the distance L2 between the inner wall sides of the two longitudinal vertical walls 12 of the wiper connection base 1a is ≥ 8.8 mm. As disclosed in the background art, the width W1 of the hook-shaped part of the hook-type wiper arm 100a is 8.5 mm - 8.8 mm. Therefore, when the first hook-type wiper arm 100a is assembled, it will not interfere with the two longitudinal vertical walls 12. Then, the flip cover 22a is closed onto the base 21a to complete the assembly of the first hook-type wiper arm 100a and the first adapter 2a; when it is necessary to remove the first adapter 2a from the first hook-type wiper arm 100a, press the second elastic cantilever 52a to open the flip cover 22a, and forcefully move the positioning block 3a of the first adapter 2a out of the space clamped by the upper leg 101a and the lower leg 102a of the first hook-type wiper arm 100a, and remove the first adapter 2a from the first hook-type wiper arm 100a through the hollow part 2211a of the flip cover 22a.

[0016] As Figures 4-1 to 4-6, the present invention discloses a second adapter 2b for adapting a sliding cover type wiper arm 100b, the sliding cover type wiper arm 100b includes a sliding cover 1011b, a U-shaped seat 102b and an end joint 103b for filling the inner space of the free end of the U-shaped seat 102b. In some application scenarios, the end joint 103b can be missing, which does not affect the assembly of the sliding cover type wiper arm 100b and the second adapter 2b. The assembly relationship between the second adapter 2b and the sliding cover type wiper arm 100b can refer to CN106274819A and CN109849852A. The second adapter 2b also has a pair of third elastic cantilevers 20b at the rear end, and a resisting surface 201b is provided at the rear end of the third elastic cantilever 20b. The resisting surface 201b is used for engaging with a longitudinal lip 1011b at the rear end of a guide rail 1012b at the bottom of the sliding cover 1011b. By pressing the third elastic cantilever 20b, the resisting surface 201b is displaced to the longitudinal lip 1011b, so as to realize the unlocking of the sliding cover 1011b and the second adapter 2b in the length direction; in order to adapt to the wiper connection base disclosed in this embodiment, the second adapter 2b forms a nested block 3b for inserting into two longitudinal vertical walls 12 of the wiper connection base. A pivot groove 31 is provided on the nested block 3b. The pivot groove 31 can also adopt the technical solution disclosed in the background art, or refer to the description of the pivot groove 31 related to the fourth adapter in detail later, which will not be repeated here; on the front and rear ends of the two side walls of the nested block 3b, a thickening portion 30b is respectively protruded outward, so that an insertion space S for inserting the longitudinal vertical wall 12 of the wiper connection base is formed between the two thickening portions 30b. The insertion space S can ensure that the pivot groove 31 of the second adapter 2b can swing around the pivot axis in a certain angular range in the clockwise or counterclockwise direction. When the second adapter 2b is installed on the wiper connection base, the outer end surfaces of the two thickening portions 30b on the same side will slightly protrude from the surface of the most protruding part of the longitudinal vertical wall 12 on that side. The judgment standard for the surface of the most protruding part of the two longitudinal vertical walls 12 is that if at least one end of both ends of the rivet A protrudes from the outer wall side of the longitudinal vertical wall 12, that is, the rivet head A1 and / or the flanging A2 (the end away from the rivet head A1 due to riveting) protrudes from the outer wall side of the longitudinal vertical wall 12, then the surface of the most protruding part is used as the measurement reference. For example, if the rivet head and the flanging A2 are only partially built into the settling portion, the distance between the surfaces of the most protruding parts of the two outer wall sides of the longitudinal vertical walls 12 is actually the distance from the rivet head A1 to the outermost end of the flanging A2 at the tail end of the rivet A, as Figure 2-4 shown; if the thickness of the longitudinal vertical wall 12 is sufficient and the depth of the settling portion is deep enough, both the rivet head A1 and the flanging A2 can be built into the settling portion, then the distance between the surfaces of the most protruding parts of the two longitudinal vertical walls 12 is directly the distance between the outer wall sides of the two longitudinal vertical walls 12 (not shown in the figure).

[0017] The nested block 3b is provided with a positioning lug 33b extending oppositely on two thickening parts 30b on the same side. That is, each positioning lug 33b is partially fixed on the thickening part 30b and partially suspended above the nested block 3b clamped between the two thickening parts 30b, so as to avoid interference between the positioning lug 33b and the longitudinal vertical wall 12. The positioning lug 33b is used for being clamped with the clamping grooves 1021b on both wings of the U-shaped seat 102b. When the U-shaped seat 102b is sleeved in the sliding cover 101b, the opening end of the clamping groove 1021b is closed by the longitudinal lip 1011b formed by the guide rail 1012b on the inner wall side of the sliding cover 101b, and the positioning lug 33b is enclosed in the space surrounded by the clamping groove 1021b and the longitudinal lip 1012b, so as to realize the fixation between the sliding cover type scraping arm 100b and the second adapter 2b.

[0018] Preferably, a transverse reinforcing rib 34b is convexly provided at both ends of the opening of the pivoting groove 31 in the middle and lower part of the nested block 3b. The transverse reinforcing rib 34b is partially suspended above the nested block 3b, so as to avoid interference with the insertion of the longitudinal vertical wall 12 into the insertion space S. The structural strength of the second adapter 2b is further increased through the transverse reinforcing rib 34b. Since the main structure of the second adapter 2b is the nested block 3b and the pivoting groove 31 configured thereon has a downward opening, the overall strength of the second adapter 2b will inevitably be reduced, resulting in a reduced service life. By adding the reinforcing rib, the strength of the second adapter 2b at the limiting opening end of the pivoting groove 31 is greatly improved, so that when the force does not exceed the threshold value, the limiting opening end of the pivoting groove 31 is not easily spread open, and the service life of the product is greatly improved.

[0019] Such as Figure 2-4 And Figure 4-5, through the above settings, when the second adapter 2b is assembled to the wiper connection base, the distance L1 between the surfaces of the outermost protruding parts on the outer wall sides of the two longitudinal vertical walls 12 is less than 12.8 mm. According to the above description, the distance between the outer wall sides of the two thickening parts 30b of the second adapter 2b in the width direction is slightly greater than the distance between the surfaces of the outermost protruding parts on the outer wall sides of the two longitudinal vertical walls 12 of the wiper connection base. At the same time, as described in the background art, the inner width W2 of the U-shaped seat 102b of the sliding cover type wiper arm 100b is 12.8 mm, that is, the distance W2 between the inner wall sides of the two wings of the U-shaped seat 102b is 12.8 mm. Therefore, the two wings of the U-shaped seat 102b of the sliding cover type wiper arm 100b will not interfere with the two longitudinal vertical walls 12 of the wiper connection base, but will abut against the outer wall sides of the corresponding thickening parts 30b. Of course, if the distance between the outer wall sides of the two thickening parts 30b of the second adapter 2b in the width direction is 12.8 or slightly greater than 12.8, since the second adapter 2b is made of plastic material, the plastic itself has a certain elastic deformation space, and some hollow parts for adjusting the size of the elastic deformation can be considered to be opened in the area of the thickening part 30b, so that even if the distance between the outer wall sides of the two thickening parts 30b is slightly greater than the inner width W2 of the U-shaped seat 102b, the second adapter 2b can be fixed to the sliding cover type wiper arm 100b, and the wiper connection base meets the assembly requirements of the sliding cover type wiper arm 100b. Of course, for the convenience of assembly, the distance between the outer wall sides of the two thickening parts 30b of the second adapter 2b in the width direction is slightly less than the inner width W2 of the U-shaped seat 102b of the sliding cover type wiper arm 100b.

[0020] In summary, in order to enable the wiper connection base to be adapted to both the hook type wiper arm and the sliding cover type wiper arm 100b at the same time, as Figure 2-4 , the distance L1 between the surfaces of the outermost protruding parts on the outer wall sides of the two longitudinal vertical walls 12 of the wiper connection base is less than 12.8 mm. At the same time, the distance L2 between the inner wall sides of the two longitudinal vertical walls 12 is ≥8.8 mm, so that the thickness T range of each longitudinal vertical wall 12 is 1.2 mm ≤ T ≤ 1.7 mm. More preferably, the distance L1 between the surfaces of the outermost protruding parts on the outer wall sides of the two longitudinal vertical walls 12 is ≤12.5 mm. With such a setting, it is more convenient to install the sliding cover type wiper arm 100b. A more preferred setting is that the thickness T of each longitudinal vertical wall 12 is 1.2 mm ≤ T ≤ 1.5 mm. On the premise of taking into account the installation convenience, the overall strength of the wiper connection base is also ensured, and its service life is improved. It should be emphasized that the above numerical values of the distance and thickness are the values after the wiper connection base includes the surface coating, that is, including the material thickness of the cold-rolled sheet itself and the thickness after the cold-rolled sheet is coated with the coating.

[0021] As Figures 5-1 to 5-2, the present invention also discloses a wiper connection base 1b. An incision 123 is formed above the front part of each longitudinal vertical wall 12. The incision 123 forms a blocking surface 1231. In a preferred design, the blocking surface of the incision 123 is a concave arc surface 1231. The concave arc surface 1231 matches the arc surface of the transverse rotating shaft 101c of the side-inserted wiper arm 100c, and the top end of the concave arc surface 123 is arranged above the horizontal reference line X1 passing through the center O1 of the concave arc surface 1231. Taking the third adapter 2c assembled to the wiper connection base 1b as an example, the following illustrates how the incision 123 of the wiper connection base 1b restricts the rotating shaft 101c of the side-inserted wiper arm 100c to swing upward around the pivot shaft 13 as the swing axis in a direction away from the fixing part 11 of the wiper connection base 1b, so as to meet the assembly requirements of the side-inserted wiper arm 100c. It should be emphasized that the inventive concept given by the present invention is to form an incision 123 rather than a through hole above the front part of each longitudinal vertical wall 12. However, the present invention does not limit that the incision 123 must be established on the basis of meeting the wiper connection base 1a disclosed above. That is, if the requirement of increasing the adaptability of the wiper connection base 1a is not considered, as long as the wiper connection base has two longitudinal vertical walls 12, the requirements can be met.

[0022] Such as Figures 5-1 to 5-9As shown, the third adapter 2c at least includes two side walls 22c and a top wall 21c that enclose to form a housing 20c with a hollow inner cavity and an opening facing downward. In this specific embodiment, the housing 20c specifically includes two side walls 22c, a front end wall 23c, a rear end wall 24c and a top wall 21c that enclose to form a rectangular housing 20c. And the front part of the top wall 21c has a guiding arc surface 211c. A nested block 3c is disposed inside the inner cavity of the housing 20c. In this embodiment, the nested block 3c is configured with two side walls E1. The two side walls E1 of the nested block 3c and the two side walls 22c respectively form an insertion space S for inserting the two longitudinal vertical walls 12 of the wiper connection base 1b. A pivot groove 31 for pivotally connecting with the pivot shaft 13 is also provided on the nested block 3c. The pivot groove 31 is restricted from using the newly designed pivot groove 31 structure disclosed by the fourth adapter 2d. It has the property that the third adapter 2c is only easy to disengage from the pivot shaft 13 of the wiper connection base 1b when its front end is upturned. For the specific structure of the pivot groove 31, please refer to the description of the pivot groove 31 in the subsequent fourth adapter 2d, which will not be repeated here; in a preferred design, at least the lengths of the two side walls E1 of the nested block 3c in the height direction are greater than the lengths of the two side walls 22c in the height direction. This can increase the contact area between the two side walls E1 of the nested block 3c and the two longitudinal vertical walls 12 of the wiper connection base 1b, reduce the jitter of the third adapter 2c and the wiper connection base 1b in the width direction, and improve the stability of their pivot connection; more preferably, a relief through groove 212C is provided on the top wall 21c in the overlapping area relative to the two longitudinal vertical walls 12, so that when the pivot groove 31 of the third adapter 2c rotates clockwise or counterclockwise around the pivot shaft 13, the tops of the two longitudinal vertical walls 12 will not interfere with the inner wall of the top wall 21c, which can effectively reduce the overall height of the third adapter 2c, thereby further reducing the wind resistance area of the third adapter 2c. It should be emphasized that the inventive concept disclosed by this technical feature is not only applicable to this third adapter 2c. Whenever the housing 20c of the adapter is configured with two side walls 22c and a top wall 21c, and at least one of the purposes of providing a through groove on the top wall 21c is to reduce the interference between its inner wall side and the top of the longitudinal vertical wall 12, it is applicable to the inventive concept of this structure. At the same time, the corresponding longitudinal vertical wall 12 can be designed to be higher in the middle and gradually lower at both sides to avoid the top end face of the longitudinal vertical wall protruding from the top end of the third adapter 2c and interfering with the inner wall of the corresponding wiper arm during the rotation process. For example Figure 5-1 As shown, an arc-shaped design 125 is formed on the top end face of the longitudinal vertical wall 12.

[0023] The top wall 21c is provided with a laterally extending vertical wall 213c that extends downward at the rear end of the pivot slot 31. At least the laterally extending vertical wall 213c protrudes more than the bottom end of the nested block 3c. When the third adapter 2c is installed on the wiper connection base 1b, the laterally extending vertical wall 213c will preferentially abut against the support plate 111 of the wiper connection base 1b, so that the rear end of the third adapter 2c is lifted upward, and the front bottom end of the nested block 3c abuts against the support plate 111, creating a relatively stable static connection between the third adapter 2c and the wiper connection base 1b. In a more preferred design, a limiting vertical wall 214c is added at the front of the nested block 3c. The limiting vertical wall 214c can be fixedly connected to the front of the nested block 3c or fixedly connected to the top wall 21c and extend downward. By adjusting the length of the downward extension of the limiting vertical wall 214c, it is more convenient to adjust the relative position between the third adapter 2c and the wiper connection base 1b when they are in a static connection state. Of course, if the length of the nested block 3c is long enough and the length of the front end of the nested block 3c is adjusted, the setting of the limiting vertical wall 214c can be cancelled. The static connection state disclosed in this embodiment is that the third adapter 2c is basically horizontally arranged on the wiper connection base 1b. It should be noted that if the nested block 3c does not protrude beyond the two side walls 22c and the limiting vertical wall 214c is not provided, the third adapter 2c can rely on the front bottom ends of the two side walls 22c to abut against the support plate 111, so that the third adapter 2c and the wiper connection base 1b are in a stable static connection state;On both side walls 22c, a circular jack 221c matching the rotating shaft 101c of the side insertion scraping arm 100c is formed at a position relative to the notch 123 of the two longitudinal vertical walls 12. At least one relief portion is formed in the front portion of the nested block 3c in the area relative to the circular jack 221c. A through-channel U for inserting the side insertion scraping arm 100c is constructed by the circular jack 221c of the two side walls 22c and the relief portion of the nested block 3c. The blocking surface 1231 formed by the notch 123 preferably adopts a concave arc surface 1231. The center of the circular jack 221c is substantially concentric with the concave arc surface 1231 of the notch 123. The rotating shaft 101c of the side insertion scraping arm 100c is inserted into the through-channel U and is partially surrounded by the concave arc surface 1231 of the notch 123, that is, the top end of the concave arc surface 1231 is arranged above the horizontal reference line X1 passing through its center O1 (the center of the rotating shaft 101c). Since the third adapter 2c is clamped on the pivot shaft 13 through the pivot slot 31, the third adapter 2c is only easy to disengage from the pivot shaft 13 of the wiper connection base 1b when its front end is upturned. At this time, the rotating shaft 101c of the side insertion scraping arm 100c is also inserted into the through-channel U constructed by the third adapter 2c. Even if the third adapter 2c wants to make its front end upturn around the pivot shaft 13, but at this time, the rotating shaft 101c and the concave arc surface 1231 of the notch 123 interfere with each other, restricting the third adapter 2c from swinging upward around the pivot shaft 13 in the direction away from the fixing portion 11 of the wiper connection base 1b, thereby ensuring the stable connection between the third adapter 2c and the wiper connection base 1b; at the same time, through the mutual abutment between the limiting vertical wall 214c and the support plate 111, it is restricted that the circular jack 221C will not swing downward beyond the lower bottom edge of the notch 123, preventing the rotating shaft 101C from directly receiving force on the lower bottom edge of the notch 123 and causing collision and wear between the two, because at this time, the rotating shaft 101c of the scraping arm 100c directly acts on the circular jack 221C. During use, the rotating shaft 101c is a metal part and will cause wear to the circular jack 221C of the third adapter 2c. However, since the third adapter 2c is a vulnerable part and can be replaced, it is possible to prevent the rotating shaft 101c of the scraping arm 100C from interfering with the lower bottom edge of the 123 notch and avoid affecting the service life of the scraping arm 100c. When it is necessary to detach the third adapter 2c from the wiper connection base 1b, only need to pull out the rotating shaft 101c of the side insertion scraping arm 100c from the through-channel U, apply force to drive the front end of the third adapter 2c to upturn, so that the transverse vertical wall 213c is elastically deformed under pressure, and pull out the opening of the pivot slot 31 of the third adapter 2c from the pivot shaft 13 to achieve this.;

[0024] Preferably, in order to match the distance between the two side walls 22c of the third adapter 2c with the length of the L-shaped limiting arm 102c of the side-insert scraping arm 100c, a protrusion 222c can be added only to the side wall 22c on the side for inserting the rotating shaft 101c and in the area of the circular jack 221c, without increasing the thickness of the overall side wall 22c, which is beneficial to reducing material consumption. More preferably, protrusions 222c are provided on both side walls 22c, that is, the third adapter 2c is symmetrically arranged with respect to the central axis, so that the third adapter 2c can be simultaneously adapted and installed on the wiper support assembly of a left-driving vehicle and the wiper support assembly of a right-driving vehicle.

[0025] More preferably, in order to make the third adapter 2c adapt to side-insert scraping arms 100c of different sizes, that is, the lengths of the L-shaped limiting arms extending from side-insert scraping arms 100c, 100c' of different sizes are different, an additional sleeve 25c can be provided on the housing 20c of the third adapter 2c. A limiting structure 26c that can be mutually clamped is provided between the sleeve 25c and the housing 20c. As disclosed in this embodiment, a hook (not shown in the figure) is provided on the inner wall of the sleeve 25c, and a clamping groove is provided at the position of the side wall 22c of the housing 20c relative to the hook. By the mutual limiting cooperation of the hook and the clamping groove, the sleeve 25c can be stably sleeved on the outside of the housing 20c. Preferably, the top wall 21c of the sleeve 25c adopts a semi-hollow design, thereby reducing the height of the third adapter 2c, saving materials and making the overall third adapter 2c lighter. Through holes 251c for docking are provided at the positions of the two side walls 22c of the sleeve 25c relative to the jack 221c. By providing the sleeve 25c, the overall width of the third adapter 2c is increased, so that it can adapt to the side-insert scraping arm 100c' with a longer L-shaped limiting arm 102c', further increasing the adaptability of the third adapter 2c.

[0026] Preferably, the value range of the angle θ between the connecting line between the center point O1 of the concave arc surface 1231 of the notch 123 and the center point O2 of the pivot shaft 13 and the horizontal reference line X1 is [-15° 15°]. In this embodiment, the center point O1 of the blocking surface 1231 of the notch 123 and the center point O2 of the pivot shaft 13 are basically on the same horizontal line, so that the projected length L3 of the upper part of each longitudinal vertical wall 12 along the vertical direction is limited within 18 mm, and more preferably L3 is limited within 16 mm. The significance of such a setting is that the wiper connection base 1b can meet the requirements of the third adapter 2c and also meet the adaptation requirements of the second adapter 2b, such as Figure 4-6, the distance L6 between the outer sides of the two positioning bumps 33b is 21 mm. Since one end of the positioning bump 33b is fixed to the thickened portion 30b, and the two thickened portions 30b extend at least 1 mm in opposite directions respectively for fixing with the positioning bump 33b, the longest distance of the insertion space S for inserting the longitudinal vertical wall 12 formed between the two thickened portions 30b is 21 mm - 2 mm = 19 mm. Then, since the second adapter 2b swings relative to the longitudinal vertical wall 12 around the pivot axis 13, 0.5 mm is reduced at each of the front and rear ends of the upper part of the longitudinal vertical wall 12, so that the projection length L3 of the upper part of each longitudinal vertical wall 12 in the vertical direction is limited within 18 mm. In order to increase the fixing area between the thickened portion 30b and the positioning bump 33b, preferably, the two thickened portions 30b extend a greater length in opposite directions respectively, for example, extend 1 mm respectively. Then, the longest distance of the insertion space S for inserting the longitudinal vertical wall 12 formed between the two thickened portions 30b is 21 mm - 4 mm = 17 mm. Another 0.5 mm of swinging space is reserved for the front and rear of the longitudinal vertical wall 12, so that the projection length L3 of the upper part of each longitudinal vertical wall 12 in the vertical direction is limited within 16 mm; at the same time, the length of the longitudinal vertical wall 12 below the positioning bump 33b can be set longer to improve the connection stability between the longitudinal vertical wall 12 and the fixed seat 11.

[0027] As Figures 6-1 to 6-15, the present invention also discloses a wiper connection base 1c. A horizontally arranged relief groove 124 is formed below the rear part of each longitudinal vertical wall 12 to adapt to some U-shaped groove wiper arms 100d with inwardly bent hooks or flanges 101d at the bottom. That is, through this relief groove 124, the mutual interference between the two longitudinal vertical walls 12 of the wiper connection base 1c and the hooks or flanges 101d of the U-shaped groove wiper arm 100d is avoided, further improving the adaptability of the wiper connection base 1c. It should be noted that the U-shaped groove wiper arm 100d defined here generally refers to the wiper arm whose longitudinal cross-section of the head is U-shaped, and the inner width of the U-shaped groove is greater than the inner width of the U-shaped seat of the sliding cover type wiper arm. The relief groove 124 formed in the wiper connection base 1c can adapt to the U-shaped groove wiper arm 100d with inwardly bent hooks or flanges 101d at the bottom, and obviously can also adapt to the U-shaped groove wiper arm 100d without inwardly bent hooks or flanges 101d. Taking one of the U-shaped groove wiper arms 100d with inwardly bent hooks or flanges 101d as an example, combined with the fourth adapter 2d installed on the wiper connection base 1c, it is better to illustrate how the wiper connection base 1c meets the assembly requirements of this type of U-shaped groove wiper arm 100d. At the same time, through the detailed description of the redesigned pivot groove 31 structure configured for the fourth adapter 2d, it is further explained why the pivot groove 31 of the fourth adapter 2d is assembled to the pivot shaft 13. Considering its force conditions, only when the front end of the fourth adapter 2d is upturned, its pivot groove 31 is easy to disengage from the pivot shaft 13, while when the fourth adapter 2d is horizontally placed and its front end is in the downward swing state, its pivot groove 31 is not easy to disengage from the pivot shaft 13, thus realizing the stable connection between the fourth adapter 2d and the wiper connection base 1c. Echoing the previous text, the structural design of the pivot groove 31 for the fourth adapter 2d can be applied to any of the previously disclosed adapters, except that the design of the guiding portion 316 is omitted for the first adapter 2a.

[0028] Such as Figure 6-1, the housing 20d of the fourth adapter 2d is similar to the housing 20c of the third adapter 2c. It also includes two side walls 22d and a top wall 21d that enclose to form a housing 20d with a hollow inner cavity and an opening facing downward. A clamping connection portion 25d for detachably connecting to the corresponding U-shaped groove wiper arm 100d is configured on the housing 20d. This clamping connection portion 25d can be adjusted differently according to the U-shaped groove wiper arms 100d of different structures, which is not the focus of the protection of the present invention. Here, a brief description is given of the clamping connection portion 25d disclosed by the fourth adapter 2d. It at least includes an elastic bump 251d provided at the rear of the top wall 21d of the housing 20d. More preferably, a protruding head 252d is provided at the front of the housing 20d. And the length of the side wall 22d in the height direction is adapted to the inner height of the U-shaped groove wiper arm 100d, and the distance between the two side walls 22d is adapted to the inner width of the U-shaped groove wiper arm 100d. The fourth adapter 2d slides into the head of the U-shaped groove wiper arm 100d from the rear to the front. The front end of the U-shaped groove wiper arm 100d is opposite to the position of the protruding head 252d of the fourth adapter 2d. The limiting through hole 102d on the rear end top wall of the U-shaped groove wiper arm 100d and the elastic bump 251d are clamped and matched with each other, so as to realize the fixed connection between the fourth adapter 2d and the U-shaped groove wiper arm 100d. When unlocking is required, only need to press the elastic bump 251d of the fourth adapter 2d, and slide the U-shaped groove wiper arm 100d out of the housing 20d of the fourth adapter 2d from the front to the rear; of course, a relief through groove (not shown in the figure) can also be opened on the top wall 21d of the fourth adapter 2d in the overlapping area relative to the two longitudinal vertical walls 12, which helps to reduce the overall height of the fourth adapter 2d.

[0029] As Figure 6-3 , the inner cavity of the housing 20d of the fourth adapter 2d is basically the same as the inner cavity of the housing 20d of the third adapter. A nested block 3d is also configured. A pivot groove 31 is opened on the nested block 3d. Here, the structures of the nested block 3d and the pivot groove 31 are described in detail: As Figure 6-3 And Figure 6-5 , it discloses nested blocks 3d with different structural forms that can be arranged in the inner cavity of the housing 20d. The common feature of each nested block 3d is that it at least has a abutting support portion K that abuts and cooperates with the two longitudinal vertical walls 12 of the wiper connection base 1c. The common abutting support portion K at least includes two side walls E1. The side walls E1 extend downward from the top wall 21d. If the side walls E1 themselves have sufficient strength, the nested block 3d can be directly composed of two side walls E1 that extend in the length direction and are arranged in parallel (such as Figure 6-3 the leftmost schematic diagram). Of course, since the adapter is made by an injection molding process and due to space limitations, relying only on the thickness of the side walls E1 and their fixed connection with the top wall 21d may not provide sufficient strength. Therefore, a solid member can be filled between the two side walls E1 (such asFigure 6-3 The schematic diagram at the rightmost end), in this embodiment, the two outer side surfaces of the solid member construct the abutting support portion K of the nested block 3d. However, this solution is not preferred as it is not conducive to saving materials and has a low qualified rate in injection molding. More commonly, several transverse vertical walls are added between the two side walls E1 of the nested block 3d to enhance the structural strength of the two side walls E1. The transverse vertical walls are generally arranged at the front end and / or the tail end and / or both ends of the opening of the two side walls E1. For the sake of convenience of explanation, the transverse vertical walls at the above positions are respectively defined as the front wall E2, the rear wall E3, the first transverse vertical wall G1, and the second transverse vertical wall G2, as Figure 6-3 The second schematic diagram on the left, which discloses an embodiment in which the nested block 3d includes two side walls E1, a front wall E2, and a rear wall E3. The hook-back portion 312 is arranged at the relief notch 32 of the two side walls E1; as Figure 6-3 The third schematic diagram on the left, which discloses an embodiment in which the nested block 3d includes two side walls E1, a first transverse vertical wall G1, and a second transverse vertical wall G2. The hook-back portion 312 is jointly arranged on the relief notch 32 of the two side walls E1 and the second transverse vertical wall G2; as Figure 6-3 The fourth schematic diagram on the left, which discloses that the nested block 3d includes two side walls E1, a front wall E2, a rear wall E3, a first transverse vertical wall G1, and a second transverse vertical wall G2. The two side walls E1 form a relief notch 32, and the hook-back portion 312 is arranged on the second transverse vertical wall G2. For the nested block 3d with this structure, the second transverse vertical wall G2, the rear wall E3, and the two side walls 22d are simultaneously fixed on the inner end surface of the top wall 21d and enclose to form a closed force ring structure. Therefore, the second transverse vertical wall G2 has a very stable mechanical structure. The hook-back portion 312 is fixedly connected to the second transverse vertical wall G2, and the hook-back portion 312 is effectively supported by the second transverse vertical wall G2. When stressed, the elastic deformation amount between the hook-back portion 312 and the second transverse vertical wall G2 relative to the closed force ring structure member can be ignored. At the same time, since the nested block 3d is composed of two hollow rectangular blocks with closed force rings in the front and back, the two side walls E1 of the nested block 3d also have better strength; of course, in order to further increase the structural strength of the second transverse vertical wall G2, a longitudinal reinforcing rib (not shown in the figure) is added at the rear end of the second transverse vertical wall G2. As Figure 6-5 , which discloses another structural form of the nested block 3d, which is composed of two I-shaped members D arranged at intervals from front to back. The opposite vertical walls of the two I-shaped members D are defined as the first transverse vertical wall G1 and the second transverse vertical wall G2 from front to back. The hook-back portion 312 is arranged on the second transverse vertical wall G2. The two outer side surfaces of the two I-shaped members D construct the abutting support portion K. At the same time, the preferred design is that the nested block 3d of the above different structural types has an extension section T that extends outward from the side wall 22d in the height direction. The extension section T is used to increase the abutting contact area between the nested block 3d and the two longitudinal walls 12. The specific manifestation is that when the nested block 3d is configured with two side walls E1 (asFigure 6-4 ), the length H1 of the two side walls E1 in the height direction is greater than the length H2 of the two side walls 22d in the height direction (as shown in Figure 6-16 ), when the nested block 3d is composed of a plurality of laterally standing walls arranged at intervals (as shown in Figure 6-5 ), the length of the 4 laterally standing walls in the height direction is greater than the length of the two side walls 22d in the height direction. In a preferred design, when the adapter is in a horizontal and transverse state connected to the wiper base 1c, the lower the distance between the abutting and supporting portion K of the nested block 3d and the support plate 111 of the wiper base 1c, the better. Of course, the premise is that it does not affect the need for the front end of the adapter to tilt up and swing down within a certain angle range. That is, the height of the abutting and supporting portion K of the nested block 3d can be designed to be higher in the middle and lower at both sides. Taking the two side walls E1 with the abutting and supporting portion K as an example, at the positions of the front and rear ends adjacent to the pivot shaft 13, the distance between the two side walls E1 and the support plate 111 of the wiper base 1c is preferably set to 0.5 - 2.0 mm. Taking this wiper base 1c as an example, the lengths of the two longitudinal walls 12 in the length direction at the lower part of the relief groove 124 are the longest. Therefore, the two side walls E1 of the nested block 3d are preferably designed to extend downward and cross over the relief groove 124, so that the bottom of the two side walls E1 of the nested block 3d has at least enough area to abut and support the maximum length mating surface of the longitudinal wall 12 in the length direction, improving the stability of their connection.

[0030] As shown in Figures 6-6 to 6-10 , it discloses that a plurality of pivot slots 31 with different structural forms are provided on the nested block 3d. Here, taking the pivot slot 31 provided between the first lateral standing wall G1 and the second lateral standing wall G2 as the best embodiment to illustrate the structure of each pivot slot 31. Of course, it does not exclude those of ordinary skill in the art from migrating the same inventive concept to the side wall E1 of the nested block 3d (as shown in Figure 6-3The leftmost schematic diagram shows that each of the pivot slots 31 has the same inventive concept: the pivot slot 31 opens downward, a matching portion 311 is provided in the pivot slot 31 to abut against the upper arc surface of the pivot shaft 13, a back hook portion 312 is provided below the matching portion 311, and a limited opening end 313 is formed between the matching portion 311 and the back hook portion 312, the limited opening end 313 is defined as a first end N1 at one end located at the matching portion 311, and is defined as a second end N2 at one end located at the back hook portion 312, and the distance L4 between the first end N1 and the second end N2 is less than the distance L4 between the pivot shaft 1 3 diameter 2R, and the height of the first end N1 is higher than the second end N2, so that the limited opening end 313 is biased toward the front end. Here, the definition of the opening biased toward the front end is that when the fourth adapter 2d is horizontally placed, the center point of the line connecting the first end N1 and the second end N2 is located at the front end of the vertical line passing through the center O2 of the pivot axis 13 along the vertical direction. This means that the first end N1 is arranged at the front end of the vertical line passing through the center O2 of the pivot axis 13 along the vertical direction, and finally the matching portion 311 and the hook portion 312 form a rotation space Q that can rotate clockwise or counterclockwise around the pivot axis 13.

[0031] Preferably, since the nested block 3d has a pivot groove 31 with an opening facing downward, in order to increase the structural strength of the nested block 3d at the pivot groove 31, connecting ribs 24d (such as Figure 6-4 ), the span between the two connecting ribs 24d is sufficient for the longitudinal vertical wall 12 of the wiper connecting base 1c to be inserted, so that the side wall 22d becomes an auxiliary supporting piece of the nesting block 3d.

[0032] Preferably, with the fourth adapter 2d in a horizontal position as a measurement reference, the first end N1 is arranged above a horizontal reference line X1 passing through the center O2 of the pivot axis 13. The definition of "above" includes placing the first end N1 directly above the horizontal reference line X1 passing through the center O2 of the pivot axis 13. The horizontal reference line X1 overlaps the position, so that when the front end of the fourth adapter 2d is in the extreme upward state, the first end N1 is at least located at the position upward of the horizontal reference line X1 passing through the center O2 of the pivot shaft 13, and will not be blocked by the lower arc area of ​​the pivot shaft 13, which makes it easier for the pivot shaft 13 to detach from the limit opening end 313; it should be noted that the above-mentioned matching portion 311 and the hook portion 312 are both arranged in the inner cavity of the shell 20d, in order to facilitate injection molding, such as Figure 6-1 A process hole 23d is formed at a position of the top wall 21d relative to the matching portion 311 and the hook portion 312, or as Figure 6-17, a process hole 23d’ is formed at the position of the side wall 22d’ relative to the pivoting groove 31; when the process hole 23d is arranged on the top wall 21d, in order to strengthen the structural strength of the engaging portion 311 and the top wall 21d, a reinforcing rib 26d is added between the top of the engaging portion 311 and the top wall 21d. It should be noted that by arranging the process hole 23d on the top wall 21d and adjusting the size of the opening of the process hole 23d, the elastic characteristics of the top wall 21d can also be effectively adjusted. If the opening of the process hole 23d is larger, when the top wall 21d is stressed, elastic deformation is likely to occur at the position of the process hole 23d.

[0033] In a preferred design, the distance L5 between the vertical line Y1 passing through the second end N2 on the hook-back portion 312 of the fourth adapter 2d and the vertical tangent Y2 of the rear end N3 of the pivoting shaft 13 ranges from

【⅓R R), and more preferably the value range of L5 is

½R R). It should be noted that the above-mentioned measurement reference for L5 is that the pivoting groove 31 of the fourth adapter 2d is sleeved on the pivoting shaft 13 and is in a horizontal and transverse state, where the definition of the rear end N3 of the pivoting shaft 13 is the horizontal reference line X1 passing through the center O2 of the pivoting shaft 13 and the point intersecting at the rear end of the pivoting shaft 13. At the same time, the limit angle α of the upward tilt of the front end of the fourth adapter 2d is limited to 【3° 20°

[0034] The mating part 311 of the fourth adapter 2d can be composed of the following several structural forms. Specifically, the inner side surface of the mating part 311 can be composed of two contact surfaces V1 with an acute included angle (as Figure 6-6 shown); or the inner side surface of the mating part 311 is composed of three contact surfaces V2 enclosing a U shape (as Figure 6-7 shown). More preferably, the inner side surface of the mating part 311 is composed of a first arc surface 3111 that rotates in cooperation with the pivot shaft 13 (as Figure 6-8 shown). By setting it like this, the first arc surface 3111 and the pivot shaft 13 have a larger contact area, making the force more uniform. At the same time, compared with the mating part 311 of the previous two structural forms, the mating part 311 with an arc surface structure has no obvious bending angle transition, so it does not have the inherent defect of large stress concentration at the bending part, and can effectively improve the service life of the product; a hook part 312 is provided below the mating part 311 and at the rear end of the lower arc surface of the pivot shaft 13. The free end of the hook part 312 extends forward. In a preferred design, the inner side surface of the hook part 312 is provided with a second arc surface 3121 that rotates in cooperation with the arc surface of the pivot shaft 13 (as Figure 6-9 )), and when the inner side surface of the mating part 311 is configured with the first arc surface 3111, the second arc surface 3121 and the first arc surface 3111 have the same center of circle and radius (as Figure 6-8 shown).

[0035] In a preferred design, as Figure 3-5 and Figure 6-10, at least a guiding inclined surface 314 that slopes downward from top to bottom and forward is formed at the first end N1 or below the first end N1, and at least the lower part of the limiting opening end 313 forms a flaring portion 315 that gradually expands from top to bottom, facilitating the sliding of the pivot shaft 13 into and out of the limiting opening end 313. More preferably, the inner side surface of the fitting portion 311 is a first arc surface 3111, the first end N1 is set at a position above the horizontal reference line X1 passing through the center O2 of the pivot shaft 13 (excluding the position overlapping with the horizontal reference line X1), the starting end of the guiding inclined surface 314 is set at the first end N1, and the starting end of the guiding inclined surface 314 is tangent to the first arc surface 3111 with the first end N1 as the tangent point; furthermore, the included angle β between the line connecting the first end N1 and the center O2 of the pivot shaft 13 and the horizontal reference line X1 is limited to 15° ± 5°, that is, the first end N1 is located on the upper semi-circular surface of the pivot shaft 13, neither too low nor too high. If it is too high, the abutting and supporting area between the fitting portion 311 and the pivot shaft 13 is reduced, affecting the stability of the pivotal connection between the fourth adapter 2d and the wiper connection base. If it is too low, a guiding inclined surface 314 with an inclination angle cannot be formed. Based on the setting of the position of the first end N1, the included angle r formed between the guiding inclined surface 314 and the vertical plane is 15° ± 5°, and the region where the guiding inclined surface 314 and the hook-back portion 312 overlap horizontally from top to bottom is designed as the flaring portion 315; through the setting of the guiding inclined surface 314, when the fourth adapter 2d is at the extreme upward angle α at the front end, the escape channel J constructed by the guiding inclined surface 314 and the free end of the hook-back portion 312 is basically consistent with the force direction F1 of the external force. At the same time, the free end (outer end) of the hook-back portion 312 forms a circular arc chamfer 3122. Any of the above structural features will facilitate the pivot shaft 13 to smoothly slide into / slide out of the limiting opening end 313 through the flaring portion 315.

[0036] Meanwhile, a preferred design is as Figure 6-10 , a guiding portion 316 is formed below the flaring portion 315. The guiding portion 316 is used to guide the pivot shaft 13 to the flaring portion 315, and then the pivot shaft 13 is sleeved into the rotation space Q constructed by the fitting portion 311 and the hook-back portion 312 via the limiting opening end 313. Preferably, any horizontal spacing of the guiding portion 316 is greater than the horizontal spacing of the flaring portion 315 and greater than or equal to the diameter D of the pivot shaft 13, so that the pivot shaft 13 can freely enter and exit the guiding portion 316 and slide into the limiting opening end 313 through the flaring portion 315 and finally reach the rotation space Q.

[0037] Through the above settings, as Figures 6-11 to 6-13When the fourth adapter 2d needs to be detached from the wiper connecting base 1c, the most labor-saving way is to manually pry the front end of the fourth adapter 2d. At this time, the force direction F1 is tilted upward toward the rear end, driving the front end of the fourth adapter 2d to tilt up. When the fourth adapter 2d tilts up to the limit angle α, the rear bottom end of the nested block 3d and the support plate 111 of the wiper connecting base 1c are supported against each other to form a lever fulcrum O3. 1. The external force F1 has the effect of driving the guiding inclined surface 314 to deflect upward and outward along the arc surface of the pivot axis 13 (clockwise around the pivot axis 13), that is, the guiding inclined surface 314 has a tendency to move upward out of the pivot axis 13; 2. The overlapping area C1 of the back hook portion 312 and the pivot axis 13 along the force direction F1 is small; 3. The matching portion 311 located at the front end of the pivot axis 13 is subjected to the upward pulling force of F1, and the matching portion 311 located at the pivot axis 1 3 The back hook portion 312 at the rear end is blocked by the pivot shaft 13 and will be subjected to the reverse force exerted on it by the pivot shaft 13, that is, the top wall 21d of the fourth adapter 2d is subjected to a relatively large bending stress in the area relative to the pivot groove 31. At the same time, if the top wall 21d is provided with a process hole 23d, the opening of the process hole 23d will increase the elastic characteristics of the top wall 21d, but will reduce the structural strength of the top wall 21d. Therefore, it is preferred to add a reinforcing rib 26d between the matching portion 311 and the top wall 21d; 4. The external force F1 will exert a horizontal backward component force on the fourth adapter 2d, and the horizontal component force can drive the back hook portion 312 to slide in the direction away from the pivot shaft 13; 5. The external force F1 uses O3 as the lever fulcrum to amplify the force of the pivot shaft 13 acting in the reverse direction on the limit opening end 313 and the back hook portion 312; when the external force F1 is appropriately increased, such as Figure 6-12 Since the structural strength of the top wall 21d is the weakest at the position relative to the pivot groove 31, when the bending stress in this area reaches a certain threshold, the limit opening end 313 is squeezed and stretched outward by the pivot shaft 13, and the top wall 21d is elastically deformed to bend inward relative to the pivot groove 31, so that the first transverse vertical wall N1 and the second transverse vertical wall N2 are both deflected outward. At this time, the matching portion 311 and the first end N1 move upward to break away from the surface contact with the arc surface of the pivot shaft 13, so that the guiding inclined surface 314 forms a line-surface contact with the pivot shaft 13, and the return hook portion 312 also moves upward synchronously, transitioning from the original surface contact with the pivot shaft 13 to line-surface contact, so that the blocking contact area between the return hook portion 312 and the pivot shaft 13 is reduced. At the same time, since the guide inclined surface 314 and the return hook portion 312 are designed to be flared, as the guide inclined surface 314 gradually moves upward relative to the pivot shaft 13, as shown in FIG. Figure 6-13, the distance between the guiding inclined surface 314 and the free end 3122 of the hook-back portion 312 also becomes larger and larger, making the distance between the first end N1 and the second end N2 greater than the diameter D of the pivot shaft 13, so that the rotation space Q constructed by the fitting portion 311 and the hook-back portion 312 of the fourth adapter 2d slides out from the pivot shaft 13, realizing the detachment of the fourth adapter 2d from the wiper connection base 1c.

[0038] As Figure 6-15When the front end of the fourth adapter 2d is in a swinging state (in fact, the front end of the fourth adapter 2d loaded with the scraper arm often remains in a swinging state due to the pushing force of the scraper arm), it is assumed that there is an external force F1 inclined upward toward the front end at the rear end of the fourth adapter 2d to drive the front end of the fourth adapter 2d to swing down. When the fourth adapter 2d swings down to a limit angle δ, the limit angle δ is less than 25 degrees. The limit angle δ of this specific embodiment is 10°±5°. A lever fulcrum O4 is constructed by supporting the support plate 111 of the wiper connection base 1c against each other. 1. The external force F1 has the effect of driving the guide inclined surface 314 along the pivot joint The shaft 13 deflects downward and inward (counterclockwise around the pivot shaft 13), and at the same time, the force direction of the external force F1 is cross-set with the escape channel J constructed by the guide slope 314 and the back hook portion 312, which is not conducive to the escape channel J being separated from the pivot shaft 13; 2. The overlapping area C2 of the back hook portion 312 and the pivot shaft 13 along the force direction F1 is greater than the overlapping area C1; 3. The external force F1 will apply a horizontal forward component force to the fourth adapter 2d, and the horizontal component force can drive the back hook portion 312 to slide in the direction close to the pivot shaft 13, so that the second arc surface 3121 of the back hook portion 312 fits more closely during the force process. When the external force F1 is further increased, the top wall 21d will also produce an inward elastic deformation in the area of ​​the pivot groove 31, and the return hook portion 312 may be slightly opened by the pivot shaft 13, that is, the pivot shaft 13 opens the limit opening end 313, and the initial opening of the limit opening end 313 is consistent with the upward tilt of the front end of the fourth adapter 2d, but the guide inclined surface 314 will not slide along the upper side of the pivot shaft 13, so the return hook portion 312 needs to elastically deform a longer distance to the rear end to make the distance between the second end N2 and the first end N1 of the return hook portion 312 at least equal to the diameter D of the pivot shaft 13, but the above Regarding the description of the nested block 3d, the hook portion 312 is configured on a component with sufficient structural strength, such as the second transverse wall G2 disclosed in this specific embodiment. According to the previous description, the distance of the rearward elastic deformation of the closed force ring component formed by the second transverse wall G2 relative to its rear end is very limited, that is, the second transverse wall G2 and the hook portion 312 cannot achieve the displacement of the second end N2 of the hook portion 312 to a sufficiently long distance backward within the range of their elastic deformation, unless either the second transverse wall G2 undergoes plastic deformation or the mating portion 311 undergoes structural collapse, thereby achieving a stable connection between the fourth adapter 2d and the wiper connecting base 1c.

[0039] like Figure 6-10, when the fourth adapter 2d is in a horizontal and transverse state, a horizontally upward acting force F1 is applied to the fourth adapter 2d (generally, the hands hold both side walls 22d of the fourth adapter 2d and lift it upward). At this time, the difficulty of removing the fourth adapter 2d from the wiper connection base 1c is between the front end of the fourth adapter 2d being upturned and the rear end being upturned. Although the guiding inclined surface 314 has a tendency to displace upward relative to the pivot axis 13, since the hook-back portion 312 surrounds the pivot axis 13 in the vertical direction and the two form a surface contact, based on the previous description, the overlapping area C3 of the hook-back portion 312 along the F1 force direction and the pivot axis 13 satisfies C1 < C3 < C2. The hook-back portion 312 is arranged on the second horizontal standing wall G2 with sufficient strength. The second horizontal standing wall G2 has sufficient strength, and the vertically upward external force F1 is basically offset by the force applied by the pivot axis 13 in the direction of the hook-back portion 312, and it is impossible to apply more lateral component forces to the first horizontal standing wall G1, making it difficult to drive the hook-back portion 312 to expand outward; at the same time, when the hands hold both side walls 22d, the side walls 22d, as the auxiliary support pieces of the two side walls E1 of the nested block 3d, also increase the difficulty of the first horizontal standing wall G1 and the second horizontal standing wall G2 expanding outward, preventing the distance between the first end N1 and the second end N2 from being enlarged. At the same time, when the fourth adapter 2d is horizontally held by hand and pulled upward and detached from the pivot axis 13 of the wiper connection base 1c, the force is not magnified by a lever. All the above factors ensure that when the fourth adapter 2d is in a horizontal state, its stable connection with the wiper connection base 1c can be achieved.

[0040] It should be noted that the fourth adapter 2d can achieve different detachment effects in different postures. In addition to the guiding inclined surface 314, the layout of the position of the limiting opening end 313 and the design requirements for the strength of the hook-back portion 312, as revealed previously, the length of the hook-back portion 312 should not be too long or too short. At the same time, there are also certain requirements for the limit angle α of the front end of the fourth adapter 2d being upturned and the limit angle δ of the rear end being upturned, that is, there is a negative correlation between the value range of the distance L5 of the fourth adapter 2d and the limit of the front end upturn limit angle α. The larger the upturn angle of the limit angle α, the smaller the value range of the distance L5. Ensure that when the front end of the fourth adapter 2d is upturned at the limit angle α, the second end N2 does not cross the vertical perpendicular line Y3 of the center O2 of the pivot axis 13 to reach the front semi-circular area. Otherwise, if the length of L5 is too long, such as Figure 6-14The free end of the hook portion 312 passes over the vertical line Y3 along the vertical direction, which will greatly increase the difficulty of detaching the fourth adapter 2d from the wiper connection base 1c; at the same time, the upper limit angle δ of the rear end of the fourth adapter 2d is limited, and the limit angle δ is less than 25 degrees. The preferred range of the limit angle δ is 10°±5°, so that the hook portion 312 is located in the lower semicircular area of ​​the pivot shaft 13, and can have a larger abutment contact area with the pivot shaft 13. When subjected to force, the pivot shaft 13 will apply a larger reaction force to the hook portion 312, and according to the above description, the hook portion 312 is designed to have a stable structural strength, so that the fourth adapter 2d is difficult to detach from the wiper connection base 1c.

[0041] It is emphasized again that the design of the cutout 123 and the clearance groove 124 of the longitudinal wall 12 on the wiper connecting base disclosed in the present invention is not limited to being made of cold-rolled plate material, and zinc alloy or other materials can also be used. At the same time, the above-mentioned adapters are also not limited to being adapted to wiper connecting bases of specific materials. It is only necessary to configure the longitudinal wall 12 and the pivot shaft 13 on the wiper connecting base.

[0042] Additional explanation is needed, such as Figure 7 As shown, the present invention further discloses a wiper connection base 1d, which discloses that the cutout 123 and the give way groove 124 are both distributed in a mirror-symmetrical manner along the longitudinal center axis P passing through the center O2 of the pivot shaft 13. Of course, the wiper connection base is not necessarily configured with the cutout 123 and the give way groove 124 at the same time. In some embodiments, the wiper connection base is only configured with the cutout 123, and in some embodiments, the wiper connection base is only configured with the give way groove 124. Ordinary technicians in this field can only distribute the cutout 123 or the give way groove 124 in a mirror-symmetrical manner along the longitudinal center axis P passing through the center O2 of the pivot shaft 13 as needed (not shown in the figure). The advantage of such a design is that the same wiper arm is often configured for the same vehicle model, but the installation direction of the wiper arm will be adjusted according to the different left-hand drive habits and right-hand drive habits. By adopting the wiper connection base 1d disclosed in this embodiment, it is only necessary to rotate the corresponding adapter horizontally by 180 degrees to meet the assembly requirements of the corresponding wiper arms of left-hand drive vehicles and right-hand drive vehicles of the same vehicle model without replacing the wiper connection base and the adapter.

[0043] 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 adapter, which serves as an intermediate connecting piece for establishing a pivotal connection between a wiper connecting base and a wiper arm; the wiper connecting base comprises at least two longitudinal walls and a pivot axis disposed transversely between the two longitudinal walls; the adapter comprises two side walls and a connecting wall disposed transversely between the two side walls to form a shell with an open bottom and a hollow inner cavity, the nesting block is fixedly arranged in the inner cavity of the shell, and an insertion space is formed between the nesting block and the opposite side wall for the corresponding longitudinal wall to be inserted, so that the nesting block is inserted into the wiper connecting base. Between the two longitudinal walls of the base, the nesting block is provided with a pivot groove with an opening facing downward, and a matching portion abutting against the upper arc surface of the pivot shaft is provided in the pivot groove, and the two ends of the opening used for the abutting contact surface of the pivot shaft are defined as limit opening ends, and the limit opening ends are defined as a first end N1 and a second end N2 from front to back, respectively, and the distance L4 between the first end N1 and the second end N2 is less than the diameter of the pivot shaft, and the matching portion of the pivot groove is rotatably sleeved on the pivot shaft through the limit opening end, characterized in that, The pivot groove forms a hook portion extending toward the front end at the rear end relative to the arc surface of the lower part of the pivot shaft, so that the second end is arranged on the hook portion. When the adapter is placed horizontally, the height of the first end N1 is higher than the second end N2. The center point of the line connecting the first end N1 and the second end N2 is located at the front end of the vertical line passing through the center O2 of the pivot shaft along the vertical direction, so that the limit opening end is biased toward the front end; the opening is located below the limit opening end to form a guide portion, and the guide portion is used to guide the pivot shaft to the limit opening end.

2. The adapter according to claim 1, characterized in that: The adapter's pivot groove is placed on the pivot shaft, and its horizontal position is taken as a reference. The distance between the vertical perpendicular line Y1 on the hook portion passing through the second end and the vertical tangent line Y2 at the rear end N3 of the pivot shaft is L5, and the value range of L5 is between [⅓R R).

3. The adapter as claimed in claim 2, characterized in that: The value range of L5 is between [½R R).

4. The adapter according to claim 2 or 3, characterized in that: The matching portion of the pivot slot is a first arc surface, and the first arc surface and the hook portion together construct a rotation space around the pivot axis, so that the pivot slot can rotate clockwise or counterclockwise relative to the pivot axis.

5. The adapter according to claim 4, characterized in that: The inner side surface of the hook-back portion is a second arc surface, the second arc surface has the same center and radius as the first arc surface, and the outer end of the hook-back portion forms an arc chamfer.

6. The adapter according to claim 4, characterized in that: With the adapter in a horizontal position as a reference, the first end N1 is arranged above a horizontal reference line X1 passing through the center of the pivot axis O2, and the guide portion forms a guide slope inclined from top to bottom toward the front end at the first end N1 or the lower part of the first end N1.

7. The adapter according to claim 6, characterized in that: When the starting end of the guiding inclined surface is located at the first end, the starting end of the guiding inclined surface is tangent to the first arc surface with the first end N1 as the tangent point.

8. The adapter according to any one of claims 2 to 7, characterized in that: The pivot axis is divided into a front semicircle area and a rear semicircle area by a perpendicular line passing through the center of the circle; when the front end of the horizontal reference line of the adapter is upturned at an extreme angle a, the second end N2 will not reach the front semicircle area.

9. The adapter according to claim 8, characterized in that: The value range of the limit angle a is [3° 20°], and the angle β between the line connecting the first end N1 and the center of the pivot axis O2 and the horizontal reference line X1 is limited to 15°±5°.

10. The adapter according to claim 9, characterized in that: The value range of the limit angle a is [3° 10°].

11. The adapter according to any one of claims 1 to 10, characterized in that: The nested block at least includes two side walls and / or a first transverse upright wall and a second transverse upright wall spaced from front to back, and the pivot groove is arranged on the two side walls and / or between the first transverse upright wall and the second transverse upright wall, at least ensuring that the hook portion is arranged on the side wall and / or the second transverse upright wall, and the side wall and the second transverse upright wall provided with the hook portion have sufficient structural strength so that they are not easily bent and deformed when subjected to force.

12. The adapter according to claim 11, characterized in that: When the nested block includes a first transverse upright wall and a second transverse upright wall, the matching portion is arranged between the first transverse upright wall and the second transverse upright wall, the hook portion is arranged on the second transverse upright wall, and the guide portion is composed of a guide slope arranged on the inner side of the first transverse upright wall and a second transverse upright wall in a lower area located at the hook portion, and the guide slope is inclined from the first end N1 or the lower part of the first end N1 from top to bottom toward the front end, the guide portion is located in a horizontal overlapping area with the hook portion and is set as a small diameter portion, and is located in a horizontal overlapping area below the hook portion and is set as a large diameter portion, and at least the small diameter portion is flared from top to bottom, and the minimum horizontal spacing of the large diameter portion is greater than or equal to the diameter of the pivot shaft.

13. The adapter according to claim 12, characterized in that: The nested block includes a hollow rectangular component formed by two side walls, a front wall and a rear wall. The first transverse upright wall and the second transverse upright wall are arranged between the two side walls from front to back. The second transverse upright wall has sufficient structural strength by increasing the wall thickness and / or adding reinforcing ribs at the rear and / or forming a closed force ring component with the two side walls and the rear wall. The two side walls are provided with a clearance gap between the first transverse upright wall and the second transverse upright wall for the pivot shaft to freely enter and exit the sleeve, so that the first transverse upright wall, the second transverse upright wall, the matching part, the hook part, the opening and the clearance gap are jointly configured as the pivot groove.

14. The adapter according to claim 1, wherein: The connecting wall is arranged on the top of the two side walls, which is defined as a top wall. The top wall is provided with a hollow portion at a position relative to the pivot groove.

15. The adapter according to any one of claims 1 to 14, characterized in that: The nested blocks are provided with connecting ribs fixedly connected to adjacent side walls at the front and rear ends of the opening, and the span between the two connecting ribs is sufficient for the longitudinal vertical wall of the wiper connection base to be inserted, so that the side wall becomes an auxiliary support piece of the nested block.

16. The adapter according to any one of claims 1 to 15, characterized in that: The length H1 of the side wall of the nested block along the height direction is greater than the length H2 of the two side walls along the height direction.

17. A windshield wiper, comprising a windshield wiper bracket assembly and a windshield wiper connecting base, wherein the windshield wiper connecting base comprises at least two longitudinal walls and a pivot shaft disposed transversely between the two longitudinal walls, and is fixedly mounted on the windshield wiper bracket assembly, characterized in that: It comprises an adapter as claimed in any one of claims 1 to 16, wherein the adapter is pivotally connected with the pivot shaft via a pivot groove.

Images