Windshield wiper connecting base

Abstract

The windshield wiper connecting base is made of a cold-rolled sheet through a sheet metal process and comprises a fixing part, two longitudinal vertical walls and rivets, the fixing part is used for being fixedly connected with a hard body part of a windshield wiper support assembly, the two longitudinal vertical walls are perpendicularly arranged above the fixing part, and a through hole is formed in each longitudinal vertical wall; the rivet is arranged in the through hole in a penetrating mode and riveted, so that the rivet stretches across the two longitudinal vertical walls to form a pivot joint shaft, a sinking part is at least arranged on the periphery of the through hole located on one side of the rivet head, and the sinking part can at least partially contain the rivet head. The distance L1 between the surfaces of the most protruding parts on the outer wall sides of the two longitudinal vertical walls is smaller than the inner width W2 of a U-shaped base arranged on the sliding cover type scraping arm, meanwhile, the distance L2 between the inner wall sides of the two longitudinal vertical walls is larger than the width W1 of a hook-shaped part of the hook-shaped scraping arm, and the value range of the thickness T of each longitudinal vertical wall is 1.2 mm < = T < = 1.7 mm.

Description

Technical Field

[0001] The present invention relates to the field of windshield wipers, and particularly to a windshield wiper connection base, an adapter that can be mounted on the windshield wiper connection base, and a windshield wiper with the above-mentioned windshield wiper connection base and adapter. Background Art

[0002] A windshield wiper includes a windshield wiper support assembly and a windshield wiper connection device. The windshield wiper connection device is generally disposed in the middle of the windshield wiper support assembly and includes a windshield wiper connection base and an adapter. The bottom of the windshield wiper connection base is fixedly connected to the rigid part of the windshield wiper support assembly. For example, in the boneless windshield wiper solution disclosed in CN109177928A, as Figures 1-1 to 1-2 , the windshield wiper connection base 1a is fixedly connected to the spring piece 2a through the card seat 11a at the bottom. The spring piece 2a is the rigid part of the windshield wiper support assembly. Two parallel longitudinal vertical walls 12a are formed above the card seat 11a. A pivot shaft 13a is provided between the two longitudinal vertical walls 12a. The pivot shaft 13a is used to mount the adapter nested thereon, so that the adapter can swing slightly in the clockwise or counterclockwise direction with the pivot shaft 13a as the swing axis. This swinging method is defined as pivot connection. Most windshield wiper arms are indirectly pivotally connected and matched with the windshield wiper support assembly by being fixedly connected to the adapter. If the windshield wiper connection base is made of metal, there are two mainstream methods, such as Figure 1-3 , Figure 1-4 , Method 1: The card seat 11b and the two longitudinal vertical walls 12b of the windshield wiper connection base 1b are made of cold-rolled sheet as the processing raw material. After being processed and formed by sheet metal technology, a through hole 121b is opened in each of the two longitudinal vertical walls 12b. Then, a rivet A is inserted into the through hole 121b and riveted, so that a pivot shaft 13b is formed between the two longitudinal vertical walls 12b. The rivet head A1 of the rivet A abuts against the outer wall of one of the longitudinal vertical walls 12b. The thickness of the rivet head A1 is generally 0.8 mm - 1 mm, that is, the rivet head A1 protrudes about 0.8 mm - 1 mm from the outer wall side of the longitudinal vertical wall 12b; Method 2: As Figure 1-2 , the windshield wiper connection base includes a card seat 11a, longitudinal vertical walls 12a, and a pivot shaft 13a, all of which are made of zinc alloy material and are manufactured by an integral molding method. If design requires, the pivot shaft 13a may not protrude from the outer wall side of the longitudinal vertical wall 12a; The windshield wiper connection bases made by two different processes, the former has a low raw material cost and a simple manufacturing process, so the manufacturing cost is lower, and the latter has a high raw material cost and a complex manufacturing process, so the manufacturing cost is higher. However, the conventional windshield wiper connection base 1b made by sheet metal technology cannot be adapted to the hook-type windshield wiper arm I (such as Figure 1-6 ) and the sliding cover type wiper arm II (such as Figure 1-7), for the specific structure description of the hook-shaped wiper arm I, please refer to the wiper arms disclosed in the patent documents CN1982128A and CN1946599A. For the specific structure of the sliding cover type wiper arm II, please refer to CN109849852A. Because according to the common business logic in the wiper industry, once the wiper arm is finalized, its size generally will not be changed. For example, Figures 1-5 to 1-7 , the width W1 of the hook part of the conventional hook-shaped wiper arm is 8.5 - 8.8 mm, the inner width W2 of the U-shaped seat of the sliding cover type wiper arm is 12.8 mm, that is, the distance W3 from the central axis X1 of the wiper connection base 1b to the rivet head A1 is less than 6.4 mm. Calculating with the thickness of the rivet head A1 being 1 mm, then the distance W4 from the outer wall side of the longitudinal vertical wall 12b to the central axis X1 is limited within 5.4 mm. In order to simultaneously meet the requirements of the hook-shaped wiper arm, the distance W5 from the inner wall side of the longitudinal vertical wall 12b to the central axis X1 needs to be at least greater than 4.4 mm. Then the maximum thickness of the longitudinal vertical wall 12b can only be designed to be 1 mm. Even without considering the reserved thickness for baking paint, the strength of the longitudinal vertical wall 12b made of cold-rolled sheet at this thickness cannot meet the usage requirements. Therefore, based on an inertial design thinking, conventional practitioners have never considered making the wiper connection base 1b made by sheet metal process to adapt to both the hook-shaped wiper arm I and the sliding cover type wiper arm II at the same time, but adopted the second manufacturing process (zinc alloy material) to achieve it. Because compared with cold-rolled sheet, zinc alloy can be designed with a thicker wall thickness without a rivet head, so that its strength meets the requirements.

[0003] At the same time, as disclosed in CN105253107A, a pivot connection structure is established between an adapter 2A' and a pivot shaft 142' in a wiper connection base 1c. It should be noted that this wiper connection base 1c is not made of metal material. For example, Figures 1-8 to 1-9 as shown, a nested part 22A for inserting between the two longitudinal vertical walls 141' of the wiper connection base 1c is formed in the inner cavity of the adapter 2A'. A rotating shaft connection part (originally a rotating shaft slot) 221A is provided on the nested part 22A. The rotating shaft connection part 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 rotating shaft connection part 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'. For a more preferable design, Figure 1-10 as shown, a raised clamping point 76' is provided at the open end of the rotating shaft connection part 75' (equivalent to the central clamping position in the original text) of the adapter 71'. This can further reduce the probability of the adapter 71' disengaging from the pivot shaft 13a. (For example, Figure 1-2), but with such a design, when installing / dismounting the adapter 2A' (71') to / from the pivot shaft 142' (13a), it is necessary to press down or pull up the adapter 2A' (71') forcefully. The reaction force applied to the open end of the rotating shaft connecting portion 221A (75') through the pivot shaft 142' (13a) is used to expand it so as to complete the corresponding installation / dismounting action, which has a certain assembly difficulty.

[0004] Meanwhile, the conventional wiper connection device is used to realize the connection with the side-inserted wiper arm. Usually, a through hole that penetrates each other is opened on the two longitudinal vertical walls of the wiper connection base and the two side walls of the adapter. By inserting the transverse rotating shaft of the side-inserted wiper arm into the aforementioned through hole, the pivotal connection between the side-inserted wiper arm and the wiper connection device is realized. The specific structure can refer to the prior art disclosed in CN210591794U and CN106809174A. Summary of the Invention

[0005] The first object of the present invention is to realize a wiper connection base with low manufacturing cost and wide adaptability.

[0006] The second object of the present invention is to provide a wiper connection base that adapts to the side-inserted wiper arm on the basis of realizing the first object of the invention.

[0007] The third object of the present invention is to provide a wiper connection base that adapts to the wiper arm with inwardly bent hooks at the bottom ends of the two side walls on the basis of realizing the first or second object of the invention.

[0008] To achieve the first object of the present invention, the present invention discloses a wiper connection base, which is made of cold-rolled sheet through sheet metal processing. It includes a fixing portion, two longitudinal vertical walls and rivets. The fixing portion is used to realize the fixed connection with the rigid part of the wiper bracket assembly. The two longitudinal vertical walls are vertically arranged above the fixing portion, and a through hole is respectively opened on the two longitudinal vertical walls. The rivet is inserted through the through hole and riveted so as to form a pivot shaft across between the two longitudinal vertical walls. At least a settling portion is arranged around the through hole on the side of the rivet head. The settling portion can at least partially accommodate the rivet head, so that the distance L1 between the outermost protruding surfaces of the outer walls of the two longitudinal vertical walls < the inner width W2 of the U-shaped seat configured by the sliding wiper arm. At the same time, the distance L2 between the inner walls of the two longitudinal vertical walls > the width W1 of the hook-shaped portion of the hook-shaped wiper arm, and the thickness T of each longitudinal vertical wall ranges from 1.2 mm ≤ T ≤ 1.7 mm.

[0009] To achieve the second object of the present invention, the present invention discloses that a notch is opened above the front part of each longitudinal vertical wall. The notch forms a blocking surface, and the blocking surface is used to limit the upward swing of the transverse rotating shaft of the side-inserted wiper arm with the pivot shaft as the swing axis away from the fixing portion of the wiper connection base.

[0010] To achieve the third object of the present invention, the present invention discloses that a relief groove is formed below the rear part of each of the longitudinal vertical walls. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] 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 is a schematic diagram of a conventional windshield wiper; Figure 1-2 is a conventional windshield wiper connection base (zinc alloy); Figures 1-3 to 1-4 is a conventional windshield wiper connection base (sheet metal part); Figure 1-5 is Figure 1-3 a bottom view of the windshield wiper connection base; Figure 1-6 is a schematic diagram of a hook-shaped wiper arm; Figure 1-7 is a schematic diagram of a sliding cover type wiper arm; Figure 1-8 is a schematic diagram of a conventional windshield wiper connection base of CN105253107A; Figure 1-9 is a schematic diagram of a conventional adapter for the rotating shaft connection part adapted to the pivot shaft; Figure 1-10 is a schematic diagram of another conventional adapter for the rotating shaft connection part adapted to the pivot shaft; Figure 2-1 is a schematic diagram of the first embodiment of the windshield wiper connection base of the present invention (without pivot shaft) (counterbore); Figure 2-2 is a schematic diagram of the first embodiment of the windshield wiper connection base of the present invention (without pivot shaft) (U-shaped counterbore); Figure 2-3 is a schematic diagram of the first embodiment of the windshield wiper connection base of the present invention (counterbore); Figure 2-4 is Figure 2-3 a longitudinal sectional view along the width direction; Figure 3-1 is an exploded view of the parts for installing the first adapter on the windshield wiper connection base of the present invention; Figure 3-2 is a reference view of the assembled state of the first adapter of the present invention (flap open); Figure 3-3 is a bottom view of the base of the first adapter of the present invention; Figure 3-4 is a three-dimensional view of the base of the first adapter of the present invention installed on the windshield wiper connection base; Figure 3-5 is a 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 first adapter base of the present invention installed along the length direction of the wiper connection base; Figure 3-7 Cross-sectional view of the first adapter base of the present invention installed along the length direction of the wiper connection base (from another angle); Figure 3-8 Assembly 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 with the second type of hook-shaped wiper arm installed; Figure 4-1 Exploded view of the parts of the wiper connection base of the present invention with the second adapter installed; Figure 4-2 3D 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 a 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 Explanatory schematic diagram of 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-insert type wiper arm of the present invention; Figure 5-4 3D view of the third adapter in a flipped state of the present invention; 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-insert type wiper arm and the third adapter of the present invention; Figure 5-8Schematic diagram of the parts for installing the second type of side-insert scraping arm of the present invention; Figure 5-9 Assembly schematic diagram of the second type of side-insert scraping arm and the third adapter of the present invention; Figure 6-1 Exploded view of the third embodiment of the wiper connection base, the fourth adapter and the U-shaped groove scraping arm of the present invention; Figure 6-2 For Figure 6-1 Assembly schematic diagram; Figures 6-3 to 6-5 Schematic diagram of the structures of different embodiments of the nesting block of the fourth adapter of the present invention; Figures 6-6 to 6-9 Schematic diagram of the structures of different embodiments of the pivot slot of the fourth adapter of the invention; Figure 6-10 Longitudinal sectional view (horizontal state) of the pivot slot of the fourth adapter of the invention in the best embodiment; Figure 6-11 Longitudinal sectional view (reclined state) of the pivot slot of the fourth adapter of the invention in the best embodiment; Figures 6-12 to 6-13 Magnified view of the force-induced deformation when the pivot slot of the fourth adapter of the present invention in the best embodiment is in the reclined state; Figure 6-14 Schematic diagram showing that the hook-back part of the pivot slot of the fourth adapter of the invention is too long; Figure 6-15 Longitudinal sectional view (forward-reclined state) of the pivot slot of the fourth adapter of the invention in the best embodiment; Figure 6-16 Front view of the fourth adapter of the present invention in the horizontal state; Figure 6-17 Schematic diagram revealing that the process hole is opened 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

[0012] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0013] 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 skilled 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 wall sides 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 field 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.

[0014] 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 flap 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 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-lowered 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.

[0015] A gap is formed between each of the side walls 211a and the positioning block 3a, and this gap serves as a slot S for inserting the longitudinal vertical wall 12. Along the length direction, a first elastic cantilever 51a and a second elastic cantilever 52a are respectively arranged on each of the side walls 211a from top to bottom 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 stop block 511a is arranged on the inner wall side of each of the first elastic cantilevers 51a, and the stop block 511a is used to limit the displacement of the hook-shaped scraping arm 100a in the direction away from the positioning block 3a. Of course, since the first elastic cantilever 51a itself will expand outward and generate elastic deformation when subjected to a squeezing force in the width direction, if the force for the hook-shaped scraping arm 100a to displace in the direction towards the stop block 511a is large enough, the two side surfaces at the front end of the hook-shaped scraping arm 100a will come into abutting contact with the stop block 511a, pushing the two first elastic cantilevers 51a outward, so as to get out of the block of the stop block 511a. Preferably, a first inclined surface 5111a and a second inclined surface 5112a are respectively arranged at the front end and the rear end of the stop block 511a. The first inclined surface 5111a facilitates the hook-shaped scraping arm 100a to slide into the positioning block 3a during installation, and the second inclined surface 5112a is used to adaptively adjust the fitting gap between the first elastic cantilever 51a and the head of the hook-shaped scraping arm 100a. A clamping block 521a protrudes from the outer wall side of each of the second elastic cantilevers 52a, so that a horizontal resisting surface 5211a is formed at the bottom end of the clamping block 521a. The flip cover 22a includes a top wall 221a and two side walls 222a surrounding to form a cover structure with a hollow cavity and an opening facing downwards. A hollowed-out portion 2211a is opened on its top wall 221a, and the flip cover 22a is hingedly arranged at the rear end of the base 21a. Two convex blocks 2212a are respectively arranged at the positions of the two side walls 222a relative to the stop block 511a, and two hooks 223a are respectively arranged at the positions relative to the clamping block 521a. By the mutual engagement and clamping of the hooks 223a and the horizontal resisting surface 5211a of the clamping block 521a, the closing of the flip cover 22a and the base 21a is realized. At this time, the convex block 521a of the flip cover 22a abuts against the area of the first elastic cantilever 51a where the stop block 511a is located, and is used to limit the outward expansion of the first elastic cantilever 51a when it is stressed. It should be noted that since there is a substantially horizontal engagement and cooperation surface between the clamping block 521a and the hook 223a, it is very difficult for the flip cover 22a to be opened vertically relative to the base 21a. However, when an external force is applied to the second elastic cantilever 52a to bend it inward and deform, the clamping block 521a on the second elastic cantilever 52a is disengaged from the hook 223a at the flip cover 22a, thereby realizing the unlocking between the flip cover 22a and the base 21a. Through the above settings, it can be better ensured that when the flip cover 22a and the base 21a are in a closed state, it is not easy for them to be separated from each other.In a better design, an insurance block 224a is additionally provided downward at the inner end surface 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 the direction away from the positioning block 3a, further improving 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 alternately 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.

[0016] 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 the second type of hook-type wiper arm 100a' has a longer distance between its upper leg and the lower leg 102a' compared with the first type of hook-type wiper arm 100a, 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 gradually increases 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 preferable 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 before and after. The limiting block 212a is used to abut against the two side wings 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, adding two limiting blocks 212a can limit its swing in the width direction relative to the first adapter 2a, improving the stability of their connection. 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 )

[0017] In a 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 stretched open when the pivot groove 31 is subjected to force, causing the pivot shaft 13 to accidentally disengage from the pivot groove 31, two spaced-apart connecting ribs 24a are added between the positioning block 3a and the side wall 211a, so that the side wall 211a becomes an auxiliary support piece for the positioning block 3a. In this embodiment, the connecting rib 24a at the rear end is shared with the aforementioned limiting block 212a at the front end.

[0018] The first hook-type scraper arm 100a is assembled to the first adapter 2a for explanation. First, the pivot groove 31 of the first adapter 2a is pivotally mounted on the pivot shaft 13 of the wiper connecting base 1a. At this time, the two slots S of the first adapter 2a are inserted into the two longitudinal walls 12 of the wiper connecting base 1a with a gap, and the flip cover 22a is in an open state. Then, the hook-shaped portion of the first hook-type scraper arm 100a is inserted through the hollow portion 2211a of the flip cover 22a, and overcomes the obstruction of the stopper 511a of the first elastic cantilever 51a of the first adapter 2a, and is rotatably supported on the positioning block 3a, that is, the upper leg 101a and the lower leg 102a of the first hook-type scraper arm 100a are respectively abutted against the upper fixing surface 301a and the lower fixing surface 302a of the middle front part of the positioning block 3a. At this time, the two ends of the wiper connecting base 1a The spacing L2 between the inner wall sides of the longitudinal vertical wall 12 is ≥8.8mm. As disclosed in the background technology, the width W1 of the hook-shaped portion of the hook-type scraper arm 100a is 8.5mm-8.8mm. Therefore, the first hook-type scraper arm 100a will not interfere with the two longitudinal vertical walls 12 during assembly. Then, the flip cover 22a is closed to the base 21a to complete the assembly of the first hook-type scraper arm 100a and the first adapter 2a. When the first adapter 2a needs to be removed from the first hook-type scraper arm 100a, press the second elastic cantilever 52a to open the flip cover 22a, and use force to 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 scraper arm 100a, and move the first adapter 2a out of the first hook-type scraper arm 100a from the hollow portion 2211a of the flip cover 22a.

[0019] like 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 is also provided with 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 the longitudinal lip 1011b at the rear end of the 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 the two longitudinal vertical walls 12 of the wiper connection base. A pivot slot 31 is provided on the nested block 3b. The pivot slot 31 can also adopt the technical solution disclosed in the background art, or refer to the description of the pivot slot 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 as to form an insertion space S for inserting the longitudinal vertical wall 12 of the wiper connection base between the two thickening portions 30b. The insertion space S can ensure that the pivot slot 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 portion of the longitudinal vertical wall 12 on this side. The judgment standard for the surface of the most protruding portion of the two longitudinal vertical walls 12 is that if at least one end of the two 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 only part of the nail head and the flanging A2 are built in the settlement part, the actual distance between the surfaces of the most protruding parts of the outer wall sides of the two longitudinal vertical walls 12 is 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 settlement part is deep enough, both the rivet head A1 and the flanging A2 can be built in the settlement part, 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).

[0020] The nested block 3b is provided with a positioning convex block 33b extending oppositely on two thickening parts 30b on the same side, that is, each positioning convex block 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 convex block 33b and the longitudinal vertical wall 12. The positioning convex block 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 convex block 33b is closed 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.

[0021] Preferably, a transverse reinforcing rib 34b is protruded 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 is bound to 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.

[0022] Such as Figure 2-4 And Figure 4-5, with 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 larger 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 larger than 12.8, since the second adapter 2b is made of plastic material, the plastic itself has a certain elastic deformation space, and it can be considered to open some hollow parts for adjusting the size of elastic deformation in the area located at the thickening part 30b, so as to realize that even if the distance between the outer wall sides of the two thickening parts 30b is slightly larger than the inner width W2 of the U-shaped seat 102b, the second adapter 2b can be fixedly connected 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 smaller than the inner width W2 of the U-shaped seat 102b of the sliding cover type wiper arm 100b.

[0023] 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, and 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 preferable 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.

[0024] 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 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 describes 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 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.

[0025] 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. The nested block 3c is also provided with a pivot groove 31 for pivoting with the pivot shaft 13. The pivot groove 31 is restricted from using the newly designed pivot groove 31 structure disclosed by the fourth adapter 2d. It has the feature 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 in the width direction between the third adapter 2c and the wiper connection base 1b, and improve the stability of the pivot connection between the two. More preferably, the top wall 21c is provided with a relief through groove 212C 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. As long as 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 opening the 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 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.

[0026] 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 first 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, causing the front bottom end of the nested block 3c to abut against the support plate 111, thereby establishing 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 disposed substantially horizontally 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;The two side walls 22c are provided with a circular jack 221c that matches the rotating shaft 101c of the side insertion scraping arm 100c at a position relative to the two longitudinal vertical walls 12 and the notch 123. 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, 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 fixed 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 compressed to generate elastic deformation, and pull out the opening of the pivot slot 31 of the third adapter 2c from the pivot shaft 13 to achieve this.;

[0027] 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.

[0028] 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 the side-insert scraping arms 100c and 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 engaged is provided between the sleeve 25c and the housing 20c. For example, as disclosed in this embodiment, a hook (not shown in the figure) is provided on the inner wall of the sleeve 25c, and a slot is provided on the side wall 22c of the housing 20c at a position corresponding to the hook. By the mutual limiting cooperation of the hook and the slot, 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 on both side walls 22c of the sleeve 25c at positions corresponding 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.

[0029] 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 projection 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 thickening portion 30b, and the two thickening 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 thickening portions 30b is 21 mm - 2 mm = 19 mm. Then, because the second adapter 2b swings relative to the longitudinal vertical wall 12 around the pivot axis 13, 0.5 mm is reduced at the front and rear ends of the upper part of the longitudinal vertical wall 12 respectively, 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. To increase the fixing area between the thickening portion 30b and the positioning bump 33b, preferably, the two thickening 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 thickening portions 30b is 21 mm - 4 mm = 17 mm. Another 0.5 mm of swing 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.

[0030] Such 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 a 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.

[0031] As Figure 6-1The shell 20d of the fourth adapter 2d is similar to the shell 20c of the third adapter 2c, and also includes two side walls 22d and a top wall 21d that together form a shell 20d with a hollow inner cavity and an opening facing downward. The shell 20d is provided with a snap-fit ​​connection portion 25d for detachable / assembled connection with the corresponding U-groove scraper arm 100d. The snap-fit ​​connection portion 25d can be adjusted differently according to the U-groove scraper arm 100d with different structures. It is not the focus of protection of the present invention. Here is a brief description of the snap-fit ​​connection portion 25d disclosed by the fourth adapter 2d, which at least includes an elastic protrusion 251d arranged at the rear of the top wall 21d of the shell 20d, and more preferably a protruding head 252d is arranged at the front of the shell 20d, and the length of the side wall 22d along the height direction is adapted to the inner height of the U-groove scraper arm 100d, and the two side walls 22 The spacing between d is adapted to the inner width of the U-groove scraper arm 100d, and the fourth adapter 2d slides into the head of the U-groove scraper arm 100d from back to front, and the front end of the U-groove scraper arm 100d is opposite to the protruding head 252d of the fourth adapter 2d, and the limiting through hole 102d and the elastic protrusion 251d on the rear end top wall of the U-groove scraper arm 100d are engaged with each other, thereby realizing the fixed connection between the fourth adapter 2d and the U-groove scraper arm 100d. When unlocking is required, it is only necessary to press the elastic protrusion 251d of the fourth adapter 2d to slide the U-groove scraper arm 100d out of the shell 20d of the fourth adapter 2d from front to back; of course, the top wall 21d of the fourth adapter 2d can also open a makeshift through groove (not shown) in the overlapping area relative to the two longitudinal walls 12, which helps to reduce the overall height of the fourth adapter 2d.

[0032] like Figure 6-3 The inner cavity of the housing 20d of the fourth adapter 2d is substantially the same as the inner cavity of the housing 20d of the third adapter, and is also provided with a nesting block 3d, and a pivoting groove 31 is provided on the nesting block 3d. Here, the structures of the nesting block 3d and the pivoting groove 31 are described in detail: like Figure 6-3 and Figure 6-5 , which discloses nested blocks 3d of 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 has at least a support portion K that abuts against the two longitudinal walls 12 of the wiper connection base 1c. The common support portion K includes at least two side walls E1, which extend downward from the top wall 21d. If the side wall E1 itself has sufficient strength, the nested block 3d can be directly composed of two side walls E1 extending in the length direction and arranged in parallel (such as Figure 6-3 The leftmost schematic diagram shows that, of course, since the adapter is made by injection molding and due to space limitations, relying solely on the thickness of the side wall E1 and its connection with the top wall 21d may not provide sufficient strength. Therefore, a solid member (such asFigure 6-3 The rightmost schematic diagram shows that in this embodiment, the two outer sides of the solid component constitute the abutting support portion K of the nested block 3d, but this solution is not preferred, is not conducive to saving materials, and has a low injection molding yield; more commonly, a plurality of 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, and the transverse vertical walls are generally arranged at the head end and / or the tail end and / or the two ends of the opening of the two side walls E1. For ease 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 shown in FIG. Figure 6-3 The second schematic diagram on the left shows an embodiment in which the nested block 3d includes two side walls E1, a front wall E2 and a rear wall E3, and the hook portion 312 is disposed at the clearance notch 32 of the two side walls E1; Figure 6-3 The third schematic diagram on the left shows 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, and the hook portion 312 is disposed on the two side walls E1 and the second transverse vertical wall G2; Figure 6-3 The fourth diagram on the left shows 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 clearance gap 32, and the hook portion 312 is arranged on the second transverse vertical wall G2. With this structure of the nested block 3d, the second transverse vertical wall G2, the rear wall E3 and the two side walls 22d are simultaneously fixed to the inner end surface of the top wall 21d and enclosed to form a closed force ring structure. Therefore, the second transverse vertical wall G2 has a very stable mechanical structure, and the hook portion 312 is fixed to the inner end surface of the top wall 21d. 2 is fixed to the second transverse vertical wall G2, and the hook portion 312 is effectively supported by the second transverse vertical wall G2. When subjected to force, the elastic deformation between the hook portion 312 and the second transverse vertical wall G2 relative to the closed force ring structure can be ignored. At the same time, since the nested block 3d is composed of two front and rear hollow rectangular blocks with closed force rings, 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 is added at the rear end of the second transverse vertical wall G2 (not shown). Figure 6-5 , which discloses another type of nested block 3d, which is composed of two I-shaped members D spaced 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 portion 312 is arranged on the second transverse vertical wall G2, and the two outer side surfaces of the two I-shaped members D form abutment support portion K. At the same time, the preferred design is that the above-mentioned nested blocks 3d of different structural types have an extension section T extending outward from the side wall 22d in the height direction, and the extension section T is used to increase the abutment contact area between the nested block 3d and the two longitudinal vertical walls 12. Specifically, when the nested block 3d is provided with two side walls E1 (such asFigure 6-4 ), the length H1 of the two side walls E1 along the height direction is greater than the length H2 of the two side walls 22d along the height direction (such as Figure 6-16 As shown), when the nested block 3d is composed of a plurality of horizontal vertical walls arranged at intervals (such as Figure 6-5 ), the length of the four horizontal vertical walls in the height direction is greater than the length of the two side walls 22d in the height direction. Preferably, when the adapter and the wiper connection base 1c are in a horizontal horizontal state, the lower the distance between the support portion K of the nested block 3d and the support plate 111 of the wiper connection base 1c, the better. Of course, the premise is that it does not affect the need for the adapter to tilt up and down at the front end within a certain angle range, that is, the height of the support portion K of the nested block 3d can be designed to be high in the middle and low on both sides. For example, the support portion K is the two side walls E1. The two side walls E1 are located at the front and rear ends adjacent to the pivot shaft 13, and the distance between the wiper connection base 1c and the support portion K is 1. The spacing between the support plates 111 of the base 1c is preferably set to 0.5-2.0mm. Taking the wiper connection base 1c as an example, the two longitudinal walls 12 are longest in the length direction at the lower part of the make way groove 124. Therefore, the two side walls E1 of the nesting block 3d are preferably designed to extend downward and cross the make way groove 124, so that the bottom of the two side walls E1 of the nesting block 3d has at least enough area to support each other with the maximum length matching surface of the longitudinal wall 12 along the length direction, thereby improving the stability of the connection between the two.

[0033] like Figures 6-6 to 6-10 , which discloses that a plurality of different structural forms of pivot grooves 31 are provided on the nesting block 3d. Here, the pivot groove 31 is provided between the first transverse vertical wall G1 and the second transverse vertical wall G2 as the best embodiment to illustrate the structure of each pivot groove 31. Of course, it does not exclude that a person skilled in the art may transfer the same inventive concept to the side wall E1 of the nesting block 3d (such as 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.

[0034] 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.

[0035] Preferably, taking the fourth adapter 2d in a horizontal transverse state as a measurement reference, the first end N1 is arranged above the horizontal reference line X1 passing through the center O2 of the pivot shaft 13, and the definition of "above" includes directly arranging the first end N1 at a position overlapping with the horizontal reference line X1. In this way, when the front end of the fourth adapter 2d is in an extreme upward state, the first end N1 is at least located at a position upward from the horizontal reference line X1 passing through the center O2 of the pivot shaft 13, and will not be blocked or interfered by the lower arc area of ​​the pivot shaft 13, making 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, 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 pivot groove 31; when the process hole 23d is arranged on the top wall 21d, in order to strengthen the structural strength of the fitting portion 311 and the top wall 21d, a reinforcing rib 26d is added between the top of the fitting portion 311 and the top wall 21d. It should be noted that by setting 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.

[0036] Preferably designed, 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 pivot 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 pivot groove 31 of the fourth adapter 2d is sleeved on the pivot shaft 13 and is in a horizontal and transverse state, where the definition of the rear end N3 of the pivot shaft 13 is the horizontal reference line X1 passing through the center O2 of the pivot shaft 13 and the point intersecting at the rear end of the pivot 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°

[0037] The fitting portion 311 of the fourth adapter 2d can be constituted by the following several structural forms. Specifically, the inner side surface of the fitting portion 311 can be constituted by two contact surfaces V1 with an acute included angle (as Figure 6-6 shown); or the inner side surface of the fitting portion 311 is constituted by three contact surfaces V2 enclosing a U shape (as Figure 6-7 shown). More preferably, the inner side surface of the fitting portion 311 is constituted by a first arc surface 3111 that rotates in cooperation with the pivot shaft 13 (as Figure 6-8 shown). By such a setting, 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 fitting portion 311 of the previous two structural forms, the fitting portion 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 portion, and can effectively improve the service life of the product; a hook portion 312 is provided below the fitting portion 311 and at the rear end of the lower arc surface of the pivot shaft 13. The free end of the hook portion 312 extends forward. In a preferred design, a second arc surface 3121 that rotates in cooperation with the arc surface of the pivot shaft 13 is provided on the inner side surface of the hook portion 312 (as Figure 6-9 )), and when the inner side surface of the fitting portion 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).

[0038] 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 the lower part of the first end N1. At least the lower part of the limiting opening end 313 forms an expanding opening part 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 part 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 connection line of 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 arc 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 part 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°. The area where the guiding inclined surface 314 and the hook-back part 312 overlap horizontally is designed as an expanding opening part 315 from top to bottom; 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 part 312 is basically consistent with the force application direction F1 of the external force. At the same time, the free end (outer end) of the hook-back part 312 forms a circular arc chamfer 3122. Any of the above structural features will facilitate the smooth sliding of the pivot shaft 13 into and out of the limiting opening end 313 through the expanding opening part 315.

[0039] Meanwhile, a preferred design is as follows Figure 6-10 , a guiding part 316 is formed below the expanding opening part 315. The guiding part 316 is used to guide the pivot shaft 13 to the expanding opening part 315, and then the pivot shaft 13 is sleeved into the rotation space Q constructed by the fitting part 311 and the hook-back part 312 via the limiting opening end 313. Preferably, any horizontal distance of the guiding part 316 is greater than the horizontal distance of the expanding opening part 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 part 316 and slide into the limiting opening end 313 through the expanding opening part 315 and finally reach the rotation space Q.

[0040] 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 fourth adapter 2d slides out from the pivot shaft 13 from the rotation space Q constructed by the fitting portion 311 and the hook-back portion 312, realizing the detachment of the fourth adapter 2d from the wiper connection base 1c.

[0041] 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.

[0042] 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 hand holds both side walls 22d of the fourth adapter 2d and lifts it upwards). 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 force direction F1 and the pivot axis 13 satisfies C1 < C3 < C2. The hook-back portion 312 is arranged on the second transverse vertical wall G2 with sufficient strength. The second transverse vertical 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 cannot apply more lateral component forces to the first transverse vertical wall G1, making it difficult to drive the hook-back portion 312 to expand outwards. At the same time, when the hand holds both side walls 22d, the side walls 22d, as auxiliary support pieces for both side walls E1 of the nested block 3d, also increase the difficulty of the first transverse vertical wall G1 and the second transverse vertical wall G2 expanding outwards, 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 upwards 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.

[0043] 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 above, 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 will 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.

[0044] 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.

[0045] 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.

[0046] 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. A wiper connection base, which is made of cold-rolled plate through sheet metal processing, and comprises a fixing portion, two longitudinal walls (12) and a rivet, wherein the fixing portion is used to achieve fixed connection with the hardware part of the wiper bracket assembly, the two longitudinal walls (12) are vertically arranged above the fixing portion, and a through hole (121) is respectively opened on the two longitudinal walls (12), and the rivet (A) is inserted into the through hole (121) and riveted to span the two longitudinal walls (12) to form a pivot axis (13), characterized in that: A settling portion (122) is provided around at least one through hole (121) located on one side of the rivet head (A1), and the settling portion (122) can at least partially accommodate the rivet head (A1), so that the distance L1 between the most protruding surfaces of the outer wall sides of the two longitudinal vertical walls (12) is less than the inner width W2 of the U-shaped seat configured for the sliding cover type scraper arm, and at the same time, the distance L2 between the inner wall sides of the two longitudinal vertical walls (12) is greater than the width W1 of the hook-shaped portion of the hook-shaped scraper arm, so that the thickness T of each of the longitudinal vertical walls (12) is in the range of 1.2 mm ≤ T ≤ 1.7 mm.

2. The wiper connecting base as claimed in claim 1, characterized in that: The distance L1 between the most protruding surfaces of the outer wall sides of the two longitudinal vertical walls (12) is ≤12.5 mm, and L2 is ≥8.8 mm.

3. The wiper connecting base as claimed in claim 1, characterized in that: The thickness T of each of the longitudinal upright walls (12) is 1.2 mm ≤ T ≤ 1.5 mm.

4. The wiper connecting base as claimed in claim 1, characterized in that: A sinking portion (122) is arranged around each through hole (121).

5. The wiper connecting base as claimed in claim 1, characterized in that: The sinking portion (122) is a sinking hole.

6. The wiper connecting base according to any one of claims 1 to 5, characterized in that: A notch (123) is formed on the upper front portion of each longitudinal vertical wall (12), wherein the notch (123) forms a blocking surface for limiting the lateral rotation axis of the side wiper arm from swinging upward with the pivot axis (13) as the swing axis in a direction away from the fixed portion of the wiper connection base.

7. The wiper connecting base as claimed in claim 6, characterized in that: The blocking surface of the cutout (123) is an inwardly concave arc surface (1231), the inwardly concave arc surface (1231) matches the arc surface of the transverse rotation axis of the side scraper arm, and the top end of the inwardly concave arc surface (1231) is arranged above a horizontal reference line passing through the center O1 of the inwardly concave arc surface (1231).

8. The wiper connecting base as claimed in claim 7, characterized in that: The value range of the angle θ between the line connecting the center point O1 of the inner concave arc surface (1231) of the cutout (123) and the center point O2 of the pivot axis (13) and the horizontal reference line X1 is [-15° 15°].

9. The wiper connecting base according to any one of claims 6 to 8, characterized in that: The projection length L3 of the upper portion of each longitudinal upright wall (12) along the vertical direction is limited to within 18 mm.

10. The wiper connecting base according to claim 9, characterized in that: The projection length of the upper portion of each longitudinal upright wall (12) along the vertical direction is limited to within 16 mm.

11. The wiper connecting base according to any one of claims 6 to 10, characterized in that: The cutouts (123) are distributed in a mirror-symmetrical manner along a longitudinal center axis P passing through the center O2 of the pivot axis (13).

12. The wiper connecting base according to any one of claims 1 to 11, characterized in that: A clearance groove (124) is provided at the lower rear portion of each longitudinal upright wall (12).

13. The wiper connecting base according to claim 12, characterized in that: The clearance grooves (124) are distributed in a mirror-symmetrical manner along a longitudinal center axis P passing through the center O2 of the pivot axis (13).

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