Windshield wiper connecting assembly and windshield wiper

Abstract

The invention discloses a windshield wiper connecting assembly which comprises a fixing seat and a windshield wiper connecting base, and the windshield wiper connecting base is fixedly arranged on the fixing seat in a detachable mode. The windshield wiper connecting base is sequentially provided with a connector matching part and a fixing seat connecting part from top to bottom, and the two ends, in the length direction, of the fixing seat connecting part are provided with a front inserting block and a rear inserting block respectively. A front inserting groove and a rear inserting groove are formed in the positions, corresponding to the front inserting block and the rear inserting block, of the fixing base respectively, the front inserting block is inserted into the front inserting groove only in an inclined mode, then the front inserting block is horizontally straightened and moves backwards, and the rear inserting block is inserted into the rear inserting groove till the windshield wiper connecting base cannot move from front to back relative to the fixing base. An elastic clamping part is additionally arranged at a relative matching part of the windshield wiper connecting base and the fixed seat and is positioned in a hand operable area; the elastic clamping part is used for limiting the windshield wiper connecting base to move from back to front relative to the fixed seat; the relative matching portion of the windshield wiper connecting base and the fixing base is at least provided with a limiting matching portion used for limiting relative displacement of the windshield wiper connecting base and the fixing base in the width direction.

Description

Technical Field

[0001] This invention relates to the field of automotive parts, and more particularly to a windshield wiper for automobiles and a wiper connection assembly disposed on the wiper. Background Technology

[0002] Commonly available windshield wipers are categorized into framed wipers, frameless wipers, and hybrid wipers (three- or multi-segment wipers) based on their different frame support structures. For performance tests of these three types of wipers, please refer to the Dongchedi website: https: / / www.dongchedi.com / article / 7155363825393599012. At least for frameless and hybrid wipers, the frame support structure needs to be directly or indirectly connected to the corresponding type of wiper arm via a wiper adapter base. The definition of indirect connection via wiper adapter base is that the wiper adapter base has at least one connector part, which rotatably houses the wiper adapter (also known as an adapter), and the wiper arm is connected to the wiper adapter base through this connector. The definition of direct connection via wiper adapter base is that the wiper adapter base has a connector that can directly connect to the wiper arm. The wiper arm connection is integrated without the need for an additional wiper connector. However, since a single wiper connector base can only accommodate a limited number of wiper connector types, the types of wiper arms it can be compatible with are also limited. Therefore, wiper manufacturers have developed designs to expand wiper compatibility by replacing different wiper connector bases. For example, the wiper connector base 2' (corresponding to the original text, "connector base") disclosed in the conventional patent document CN104925029A is detachably fixed to the mounting base 1' (corresponding to the original text, "wiper bracket") via a front elastic hook 21' and a rear protrusion 22'. To ensure a stable connection between the wiper connector base 2' and the mounting base 1', the pre-tightening pressure between the elastic hook 21' and the front locking groove 12' is required. This causes the elastic hook 21' to always be in a state of elastic compression, accelerating the aging / failure of its elastic deformation. Consequently, the wiper connector base 2' may accidentally detach from the mounting base 1', rendering the wiper inoperable. Summary of the Invention

[0003] The primary objective of this invention is to provide a wiper connection assembly that ensures a stable connection between the wiper connection base and the mounting bracket.

[0004] A second objective of the present invention is to provide a wiper connection assembly that facilitates the removal and installation of the wiper connection base from the mounting bracket.

[0005] A third objective of this invention is to provide a windshield wiper connection assembly with a compact structure and small wind resistance area.

[0006] The fourth objective of this invention is to provide a windshield wiper connection assembly that is conveniently adaptable to both left-hand drive and right-hand drive vehicles.

[0007] A fifth objective of the present invention is to provide a windshield wiper that is configured with at least a wiper connection assembly that satisfies any of the above objectives.

[0008] To achieve the first objective of this invention, this invention discloses a wiper connection assembly, including a mounting base and a wiper connection base, wherein the wiper connection base is detachably fixed to the mounting base. The wiper connection base is provided with a connector mating part and a fixed seat connection part from top to bottom. The fixed seat connection part is provided with a front insertion block and a rear insertion block at both ends along the length direction. The front insertion block and the rear insertion block are rigid structures. The mounting base has a front insertion slot and a rear insertion slot at the corresponding positions of the front insertion block and the rear insertion block, respectively. The distance X1 between the upper end face of the front insertion slot and the upper end face of the rear insertion slot is less than the distance X2 between the two ends of the front insertion block and the rear insertion block. This allows the wiper connection base to insert the front insertion block into the front insertion slot only in an inclined manner, and then move it horizontally to insert the rear insertion block into the rear insertion slot, until the wiper connection base can no longer move from front to back relative to the mounting base. At this time, at least part of the front insertion block is inserted into the front insertion slot, and at least part of the rear insertion block is inserted into the rear insertion slot, thereby limiting the displacement of the wiper connection base relative to the mounting base in the height direction. An elastic locking part is added to the relative mating part between the wiper connection base and the fixed base, and in the area that can be operated by hand. The elastic locking part is used to limit the wiper connection base from moving from back to front relative to the fixed base. If the relative displacement of the front plug and the front plug slot, and the rear plug and the rear plug slot, cannot be restricted along the width direction, at least one limiting fit part shall be added to the relative mating part of the wiper connecting base and the fixed seat to restrict the relative displacement of the two along the width direction.

[0009] With the above structure, both the front and rear insert blocks are rigid structures. When they are inserted and limited with the front and rear insert slots respectively, the front and rear insert blocks will not undergo elastic deformation, thus affecting the stability of their connection. At the same time, if the relative displacement of the front insert block and the front insert slot, and the rear insert block and the rear insert slot cannot be limited along the width direction, at least one limiting fit part for limiting the relative displacement of the two along the width direction needs to be added to the relative mating part of the wiper connection base and the fixing seat. Of course, it is not excluded that the structure can achieve the limitation of the two along the width direction between the front insert slot and the front insert slot, and the rear insert block and the rear insert slot, while additional limiting fit parts (along the width direction) are added.

[0010] To achieve the second objective of the present invention, the present invention also discloses that the wiper connection base is integrally disposed on the top of the fixed base, and there are two elastic locking parts. Each elastic locking part is composed of an elastic cantilever disposed on the side of the fixed base connection part and a limiting slot disposed on the fixed base. The elastic cantilever is arranged along the length direction of the fixed base connection part, and a downwardly extending locking block is provided at the free end of the elastic cantilever. The limiting slot is opened at the top of the fixed base at a position relative to the locking block, and the locking block is locked in the limiting slot. The side of the fixed base connection is designed to be hollow, at least in the area of ​​the elastic cantilever, so that the side forms an outer wall and an inner wall spaced apart from the outside to the inside. The outer wall has an intersecting inverted L-shaped notch along the length and height directions, thereby constructing the elastic cantilever at the outer wall. The fixed end of the elastic cantilever is located at one end adjacent to the rear insertion block. The locking block of the elastic cantilever can be offset in the width and height directions when subjected to force. The fixed base is also provided with a clearance groove at the inner end of the limiting groove, which extends along the length direction and communicates with the limiting groove. The clearance groove is used to provide clearance space for the locking block of the elastic cantilever that deforms inward, so that the locking block of the elastic cantilever can be displaced in the length direction of the clearance groove.

[0011] By setting a clearance groove in the limiting slot, the locking block of the elastic cantilever is driven to deform inward, and the locking block can be displaced in the clearance groove, making it convenient for the wiper connection base to be detached from the fixed seat.

[0012] To achieve the third objective of this invention, this invention discloses a wiper connection base. The fixed base connection part includes two support blocks that extend along the length direction and are spaced apart. A transverse reinforcing plate is added between the two support blocks or above the two support blocks. The front insertion block is located at the lower part of the support block and protrudes forward, and the rear insertion block is located at the lower part of the support block and protrudes backward. There are two front insertion slots, located on both sides of the front of the fixed base, and two rear insertion slots, located on both sides of the rear of the fixed base. A positioning reinforcement block protrudes from the middle of the fixed base along the length direction. The positioning reinforcement block is located between the two front insertion slots and between the two rear insertion slots. The two outer side walls of the positioning reinforcement block and the two inner side walls of the support block together form the limiting fit part, which is defined as the first limiting fit part. At the same time, the elastic snap-fit ​​part configured on the wiper connection base that satisfies the second purpose of the invention is adopted, and the elastic cantilever of the elastic snap-fit ​​part is set on the support block.

[0013] To achieve the fourth objective of this invention, this invention discloses that the front insertion slot, rear insertion slot, and limiting slot of the fixing base are symmetrically arranged along the longitudinal center line and the transverse center line of the fixing base, respectively; if the fixing base has a positioning reinforcement block and the positioning reinforcement block has a limiting groove, the limiting groove is also symmetrically arranged along the longitudinal center line and the transverse center line of the fixing base.

[0014] To achieve the fifth objective of the present invention, the present invention discloses a windshield wiper configured with the windshield wiper connection assembly described in any of the preceding claims. Attached Figure Description

[0015] Figure 1 A schematic diagram of a conventional windshield wiper connection assembly; Figure 2-1 Assembly diagram of the wiper connection assembly (first embodiment) of the present invention; Figure 2-2 An exploded view of the wiper connection assembly of the present invention (first embodiment); Figure 2-3 Another assembly view of the wiper connection assembly (first embodiment) of the present invention; Figure 3 An exploded view of the wiper connection assembly (second embodiment) of the present invention; Figure 4-1 Assembly diagram of the wiper connection assembly (third embodiment) of the present invention; Figure 4-2 An exploded view of the wiper connection assembly of the present invention (third embodiment); Figure 4-3 An exploded view of the wiper connection assembly (third embodiment) of the present invention from another angle; Figure 4-4 A top view of the wiper connection base of the wiper connection assembly (third embodiment) of the present invention; Figure 4-5 A schematic diagram of the installation and disassembly of the wiper connection assembly (third embodiment) of the present invention; Figure 4-6 A cross-sectional view of the assembly diagram of the wiper connection assembly (third embodiment) of the present invention; Figure 4-7 for Figure 4-6 A sectional view; Figure 4-8 An exploded view of the wiper connector assembly of the present invention (third embodiment); Figure 4-9 Assembly diagram of the wiper connector assembly of the present invention (third embodiment); Figure 4-10 A schematic diagram of a mounting bracket configured in another embodiment of the wiper connection assembly (third embodiment) of the present invention; Figure 5An exploded view of the wiper connector base (third embodiment) of the present invention, which is configured with different connector mating parts and wiper connector assemblies adapted thereto; Figure 6-1 An assembly diagram of a windshield wiper equipped with the wiper connection assembly (third embodiment) of the present invention; Figure 6-2 An exploded view of a wiper equipped with the wiper connection assembly of the present invention (third embodiment); Figure 6-3 A cross-sectional view along the width direction of a wiper assembly equipped with the wiper connection component of the present invention (third embodiment). Detailed Implementation

[0016] The present disclosure will be further described below with reference to the accompanying drawings and one embodiment thereof.

[0017] In this specification, the term "longitudinal" corresponds to the direction in which the adapter or drive arm extends along its length; "lateral" is the direction perpendicular to "longitudinal," which corresponds to the direction in which the adapter or drive arm extends along its width; the relative positional relationship between "front" and "rear" corresponds to the distance between the adapter and the power end of the drive arm, with "front" being the side furthest from the power end of the drive arm and "rear" being the side closest to the power end of the drive arm. For ease of understanding, the relative positions of "front" and "rear" in this invention are consistent with the directions marked in the accompanying drawings.

[0018] The terms “first,” “second,” “third,” and similar expressions are used for descriptive and distinguishing purposes only and should not be construed as indicating or implying the relative importance of the corresponding components.

[0019] like Figures 2-1 to 2-3 This invention discloses a wiper connection assembly 10a (first embodiment), including a fixing base 1a and a wiper connection base 2a. The wiper connection base 2a has a connector mating part A and a fixing base connecting part B arranged sequentially from top to bottom. The connector mating part A is used to connect with a corresponding wiper connector assembly C, and then the wiper connector assembly C is used to connect with a corresponding wiper arm, thereby mounting the wiper arm on the wiper connection base 2a. Figure 4-8 and Figure 5The wiper connector base 2a is shown to be configured with different connector mating parts A to adapt to different wiper connector assemblies C, and then the wiper connector assembly C is used to adapt to different wiper arms. This process can greatly increase the adaptability of the wiper connector assembly 10a. Of course, it is not excluded that some types of connector mating parts A can be directly connected to the wiper arm without the wiper connector assembly C (such as the wiper connector disclosed in CN113548014A, the connector mating part A of which can be used as one embodiment of the connector mating part A of the wiper connector base 2a of the present invention, that is, the connector mating part A disclosed in the present invention can directly adapt to a specific type of wiper arm). Since the structure of the connector mating part A is prior art and not the focus of the present invention, it will not be described in detail. The fixing seat connection part B can be configured as a solid component. The definition of a solid component can be a solid injection molded part (such as...). Figures 2-2 to 2-3 As shown in the figure, under the premise of meeting the structural strength, several hollow parts (not shown) can be set on the solid injection molded part for material reduction or to meet the needs of the injection molding process. In short, the bottom of the solid component has a supporting surface, and at the same time, a U-shaped groove 213 and 223 with an outward opening is opened at both ends of the solid component along its length direction, so that the lower ends of the fixed seat connection part B form an outwardly protruding front insertion block 21 and a rear insertion block 22, respectively, so that a clearance space is formed above the front insertion block 21 and the rear insertion block 22, and a rear stop surface 221 is formed at the front end of the clearance space of the rear insertion block 22 and adjacent to the fixed end of the rear insertion block 22. The front insertion block 21 and the rear insertion block 22 are rigid structures and do not have position displacement characteristics when subjected to force. At the same time, the front insertion block 21 and the rear insertion block 22 are flush with the bottom end face of the solid component. It should be noted that the formation of the front insertion block 21 and the rear insertion block 22 is not necessarily achieved by opening a U-shaped groove. It will be adapted to the shape of the connector mating part A. However, a clearance space needs to be formed above the front insertion block 21 and the rear insertion block 22 so that the wiper connection base 2a can insert the front insertion block 21 into the front insertion groove 11 and the rear insertion block 22 into the rear insertion groove 12 in an inclined manner.

[0020] At least a portion of the two outer sides of the fixed base connecting part B is designed as a hollow cavity. As disclosed in this embodiment, the middle section of the fixed base connecting part B is designed as a hollow cavity, so that the side portion located in this area forms an outer wall W1 and an inner wall W1 spaced apart from the outside to the inside. An elastic cantilever 23 is provided on the outer wall W1. The fixed end of the elastic cantilever 23 is preferably located on the side close to the rear insertion block 22, and its free end is provided with a downwardly extending locking block 231. The locking block 231 has at least a first vertical abutment surface 2311 facing the front end. When subjected to force, the elastic cantilever 23 can be offset in the width direction relative to the fixed seat 1a. To facilitate the offset in the width direction, the thickness of the elastic cantilever 23 transitions from thin to thick from the region adjacent to the fixed end to the free end. Preferably, the side of the fixed seat connection part B forms a protrusion P in the region of the elastic cantilever 23. By expanding the gap between the outer wall W1 and the inner wall W1 through the protrusion P, the position offset of the locking block 231 of the elastic cantilever 23 can be increased.

[0021] A more preferred design for the elastic cantilever 23 is that the outer wall W1 has an intersecting inverted L-shaped notch 232 along the length and height directions. The L-shaped notch has sufficient spacing in the length direction, especially in the height direction at the free end of the elastic cantilever 23. The spacing in the height direction can be artificially increased to ensure that the locking block 231 at the free end of the elastic cantilever 23 can be offset upwards to a sufficiently high position. At the same time, a clearance guide slope 2312 is formed on the side of the locking block 231 opposite to the first vertical abutment surface 2311. When the locking block 231 of the elastic cantilever 23 slides from front to back from the side of the clearance guide slope 2312, the locking block 231 abuts against the top end face 17a of the fixed seat 1a and is limited. By setting the clearance guide slope 2312, the upward tilt of the elastic cantilever 23 at the position of the locking block 231 can be appropriately reduced, thereby minimizing the side height of the fixed seat connection part B.

[0022] The fixing base 1a is used to connect the wiper bracket and the wiper connection base 2a. The structure used to fix the wiper bracket to the wiper bracket varies depending on the type of wiper. Figure 2-2The mounting base 1a disclosed in this embodiment is suitable for frameless wiper types. Therefore, the bottom of the mounting base 1a is provided with a groove 15 and a limiting structure. The groove 15 can be directly used for the elastic support member 3 to pass through, or the elastic support member 3 can be placed in the bearing clip and passed through the groove by the two wings of the bearing clip (refer to the structure disclosed in CN108583517A). The limiting structure is used to limit the displacement of the elastic support member 3 relative to the mounting base 1a in the length direction, but these are all prior art and are not the focus of this invention, so they will not be described in detail. The fixed base 1a has a front insertion slot 11 and a rear insertion slot 12 at its two ends, respectively. The distance X1 between the upper wall end face 111 of the front insertion slot 11 and the upper wall end face 121 of the rear insertion slot 12 is less than the distance X2 between the two ends of the front insertion block 21 and the rear insertion block 22. At the same time, the top end face 17a of the fixed base 1a has a limiting slot 13 at the position relative to the locking block 231 of the elastic cantilever 23. The length of the limiting slot 13 is greater than or equal to the length of the locking block 231 of the elastic cantilever 23. The limiting slot 13 forms a first... Two vertical abutment surfaces 131, the first vertical abutment surface 2311 and the second vertical abutment surface 131 are positioned opposite each other; the elastic cantilever 23 and the limiting slot 13 are defined as elastic locking parts T; in a more preferred design, the fixing seat 1a is also provided with a relief groove 132 that communicates with the limiting slot 13 and extends along its length direction at the inner end of the limiting slot 13. The relief groove 132 is used to provide relief space for the locking block 231 of the elastic cantilever 23 that elastically deforms inward, so that the locking block 231 of the elastic cantilever 23 can be displaced in the length direction of the relief groove 132.

[0023] With the above configuration, the wiper connection base 2a is first inserted into the front insertion slot 11 in an inclined manner until the end of the rear insertion block 22 does not interfere with the upper wall end face 121 of the rear insertion slot 12. Then it is horizontally aligned. At this time, the rear insertion block 22 will not interfere with the rear insertion slot 12. Then the wiper connection base 2a is moved backward as a whole, and the rear insertion block 22 is inserted into the rear insertion slot 12 until the rear stop surface 221 abuts against the upper wall end face 121 of the rear insertion slot 12, so that the wiper connection base 2a cannot move from front to back relative to the fixed base 1a. At this time, at least part of the front insertion block 21 is inserted into the front insertion slot 11, and the rear insertion block 22 is inserted into the rear insertion slot 12. It should be noted that the displacement limitation of the wiper connection base 2a relative to the fixed base 1a from front to back is not limited to the above-mentioned structural form. For example, a closed surface can be set in the rear insertion groove 12, and the above-mentioned limiting can also be achieved by the end of the rear insertion block 22 directly abutting against the closed surface (not shown in the figure). However, the present invention preferably adopts a limiting cooperation structure in which the rear stop surface 221 and the upper wall end surface 121 of the rear insertion groove 12 abut against each other. This can maximize the protection that the rear insertion block 22 will not be subjected to the squeezing force along the length direction, which would cause the rear insertion block 22 to break and fail.

[0024] The wiper connection base 2a and the fixed seat 1a are mutually limited in height by the following specific mating structure. The heights of the front insertion block 21 and the rear insertion block 22 are respectively matched with the heights of the corresponding front insertion slot 11 and the rear insertion slot 12. That is, the front insertion block 21 and the front insertion slot 11 form a transition fit, and the rear insertion block 22 and the rear insertion slot 12 form a transition fit. Therefore, at least the bottom of the front insertion block 21 needs to be provided with a clearance slope 26 so that the front insertion block 21 can be inserted into the front insertion slot 11 in an inclined manner. The mutual limitation between the front insertion block 21 and the front insertion slot 11 and the mutual limitation between the rear insertion block 22 and the rear insertion slot 12 are used to limit the wiper connection base 2a and the fixed seat 1a in height. Simultaneously, by utilizing the mutual limiting along the width direction between the front insertion block 21 and the front insertion slot 11, and between the rear insertion block 22 and the rear insertion slot 12, the wiper connecting base 2a is limited relative to the fixed seat 1a along the width direction. When the wiper connecting base 2a cannot move backward relative to the fixed seat 1a, the locking block 231 of the elastic cantilever 23 slides into the limiting slot 13, making the first vertical abutment surface 2311 and the second vertical abutment surface 131 face each other and abut against each other, thereby limiting the backward movement of the wiper connecting base 2a relative to the fixed seat 1a and locking the wiper connecting base 2a and the fixed seat 1a. When it is necessary to remove the wiper connecting base 2a from the fixed seat 1a, only external force is needed to drive the elastic cantilever. The locking block 231 on 23 can be moved outward by using a finger to pry the free end (locking block 231) of the elastic cantilever 23 out of the limiting slot 13, or as in this specific embodiment, by pressing the free end (locking block 231) of the elastic cantilever 23 inward to move the locking block 231 to the clearance groove 132. Both of these methods can release the constraint of the wiper connecting base 2a relative to the fixed seat 1a from back to front (unlocking by pressing is more convenient for the user). This allows the rear insertion block 22 to be moved out of the rear insertion slot 12, and then the rear part of the wiper connecting base 2a to be tilted up. Finally, the front insertion block 21 is moved out of the front insertion slot 11, thus completing the unlocking of the wiper connecting base 2a and the fixed seat 1a. With the above structure, when the wiper is wiping, the fixed base 1a will generate an outward centrifugal force relative to the wiper connecting base 2a. At this time, the mutual abutment between the rear stop surface 221 and the upper wall end surface 121 of the rear insertion groove 12 ensures a stable connection between the wiper connecting base 2a and the fixed base 1a. When unlocking is required, simply press the free end of the elastic cantilever 23 inward to easily detach the wiper connecting base 2a from the fixed base 1a.

[0025] Optimal design, such as Figure 2-2The front insertion slot 11, rear insertion slot 12 and limiting slot 13 of the fixed seat 1a are symmetrically arranged along the longitudinal center line and the lateral center line of the fixed seat 1a, respectively. This allows the wiper connection base 2a to be installed on the fixed seat 1a in a 180-degree mirror image from front to back, so that the wiper connection assembly 10a can simultaneously meet the wiper adaptation requirements of both left-hand drive and right-hand drive vehicles.

[0026] like Figure 3 This invention discloses another wiper connection assembly 10a' (second embodiment), which is basically the same as the first embodiment, except that the width of the front insertion block 21 and the rear insertion block 22 is not flush with the width of the fixing seat connection part B. Correspondingly, the width of the front insertion groove 11 and the rear insertion groove 12 of the fixing seat is reduced, thereby increasing the thickness of the two sides of the front insertion groove 11 and the rear insertion groove 12, increasing their structural strength, and further strengthening the structural strength of the wiper connection base 2a and the fixing seat 1a' in the width direction.

[0027] like Figures 4-1 to 4-8 This invention discloses a third embodiment of the wiper connection assembly 10b. Compared with the wiper connection assemblies 10a and 10a' of the aforementioned two embodiments, the three have basically the same inventive concept, but innovative structural designs have been made in the setting of the fixing seat connection part B of the wiper connection base 2b and the part where the fixing seat 1b and the fixing seat connection part B cooperate. Specifically, the fixing seat connection part B of the wiper connection base 2b extends downward from both sides of the wiper connection base 2b to form two support blocks 24. The front insertion block 21 is located at the lower part of the support block 24 and protrudes forward, and the rear insertion block 22 is located at the lower part of the support block 24 and protrudes backward, so that the support block 24 forms a front stop surface 211 above the front insertion block 21 and a rear stop surface above the rear insertion block 22. Preferably, the front insertion block 21... The bottom end faces of the front insert block 21, the rear insert block 22, and the support block 24 are flush. The bottom end faces of the front insert block 21, the rear insert block 22, and the support block 24 abut against the top end face 17b of the fixed base 1b. A transverse reinforcing plate 25 is added between the two support blocks 24 and above the front insert block 21 and the rear insert block 22. The bottom end face of the transverse reinforcing plate 25 forms a first positioning reference surface 251. Elastic cantilever arms 23 are respectively provided on both sides of the two support blocks 24. Similarly, the support block 24 is designed to be hollow in the area of ​​the elastic cantilever arm 23. The specific structure of the elastic cantilever arm 23 is the same as that in the first embodiment mentioned above, and will not be repeated. It needs to be added that an outwardly protruding pressing part 233 is added to the free end of the elastic cantilever arm 23 to facilitate pressing by hand.

[0028] A positioning reinforcement block 14 protrudes upward along the length direction from the middle of the fixed base 1b. Two front insertion slots 11 and two rear insertion slots 12 are formed on the front and rear sides of the positioning reinforcement block 14, respectively. The two outer side walls 141 of the positioning reinforcement block 14 and the two inner side walls 241 of the two support blocks 24 together form a limiting engagement part for restricting the displacement of the wiper connection base 2b relative to the fixed base 1b in the width direction. This limiting engagement part is defined as the first limiting engagement part S1. At the same time, the top end face of the positioning reinforcement block 14 A second positioning reference surface 142 is formed. The mutual abutment between the first positioning reference surface 251 of the transverse reinforcing plate 25 and the second positioning reference surface 142 of the positioning reinforcing block 14 restricts the downward displacement of the wiper connecting base 2b relative to the fixed base 1b. More preferably, the top end face of the positioning reinforcing block 14 is flush with the top end face of the front insertion slot 11 and the top end face of the rear insertion slot 12, together forming the second positioning reference surface 142. This ensures that the first positioning reference surface 251 and... The contact area between the second positioning reference surface 142 is larger, ensuring that the fixing seat 1b can provide an effective support surface for the wiper connecting base 2b; the height of the front insertion groove 11 is slightly larger than the height of the front insertion block 21, and the height of the rear insertion groove 12 is slightly larger than the height of the rear insertion block 22. When the wiper connecting base 2b and the fixing seat 1b are installed in place, the mutual limiting between the top end face 212 of the front insertion block 21 and the top inner wall 112 of the front insertion groove 11, and the mutual limiting between the top end face 222 of the rear insertion block 22 and the rear insertion groove 112, ensure that the wiper connecting base 2b and the fixing seat 1b are in place. The mutual limiting of the top inner wall 122 is used to limit the displacement of the wiper connecting base 2b relative to the fixed seat 1b from bottom to top. The above setting realizes the limiting of the wiper connecting base 2b and the fixed seat 1b along the height direction. Of course, in order to facilitate the assembly of the wiper connecting base 2b onto the fixed seat 1b and reduce the assembly distance of the wiper connecting base 2b relative to the fixed seat 1b, it is preferable to provide clearance slopes 26 at least at the front end of the bottom end face of the front insertion block 21 and the rear end of the bottom end face of the rear insertion block 22.

[0029] like Figure 4-3In a preferred design, the transverse reinforcing plate 25 has four downwardly protruding limiting blocks 252, which are arranged in pairs at parallel intervals near the two front insertion blocks 21 and near the two rear insertion blocks 22. The positioning reinforcing block 14 has corresponding limiting grooves 143 at positions relative to each limiting block 252. These grooves are located at the front and rear sections of the positioning reinforcing block 14. The limiting grooves 143 extend along the length of the positioning reinforcing block 14, and their length is greater than the length of the limiting block 252. Their width is adapted to the width of the limiting block 252. Each limiting block 252 and each limiting groove 143 together form a limiting mating part for limiting the displacement of the wiper connection base 2b and the fixed seat 1b in the width direction. This limiting mating part is defined as the second limiting mating part S2. By adding the second limiting mating part S2, the relative displacement of the wiper connection base 2b and the fixed seat 1b in the width direction is further constrained, so that the wiper connection assembly 10b can withstand greater lateral force and further enhance the stability of the connection between the two.

[0030] The positioning reinforcement block 14 of the fixed base 1b is further provided with several process grooves 144. The process grooves 144 are arranged between two limiting grooves 143 along the length direction, so that the wall thickness of each part of the positioning reinforcement block 14 is approximately uniform, so as to ensure that the surface of the positioning reinforcement block 14 is not prone to air bubbles and shrinkage during injection molding. At the same time, a reinforcing rib 145 is added in the middle of the positioning reinforcement block along the length direction to ensure the structural strength of the positioning reinforcement block 14 in the middle region. Meanwhile, a hollow part 23 is provided in the transverse reinforcing plate 25 at the position relative to the reinforcing rib 145 to avoid interference between the transverse reinforcing plate 25 and the reinforcing rib 145. At least one drainage hole 1431 is provided in each limiting groove 143 and each process groove 144 to facilitate the drainage of water deposited in the limiting groove 143 and process groove 144.

[0031] like Figure 6-3When frameless wipers adopt the above configuration, they are particularly suitable for frameless wipers where the rubber strip 4 is held by the elastic support member 3. Since the bottom of the fixing base 1b is used to pass through the two elastic support members 3 and the rubber strip 4, and the rubber strip 4 is held between the two elastic support members 3, the head 41 of the rubber strip 4 will be higher than the elastic support member 3. Therefore, the bottom middle part of the fixing base 1b needs to be raised to provide a space for accommodating the head 41 of the rubber strip 4. This raised middle part of the fixing base 1b can be configured as a positioning reinforcement block 14. Then, the two front insertion slots 11 and the two rear insertion slots 12 of the fixing base 1b are set at the front and rear ends of the fixing base 1b and located on both sides of the positioning reinforcement block 14, so that the front and rear insertion slots 11 and 12 just avoid the raised middle part of the fixing base 1b (positioning reinforcement block 14). This makes the structure of the wiper connection assembly 10b more compact and stable, requires less material consumption, and has a lower overall height, effectively reducing the wind resistance area of ​​the wiper in the area of ​​the wiper connection assembly 10b. It should be noted that, as Figure 4-10 If the structural strength of the upper wall 113 of the front insertion slot 11 and the upper wall 123 of the rear insertion slot 12 meets the requirements, then the outer walls of the front insertion slot 11' and the rear insertion slot 12' of the fixing seat 1b' in this embodiment can be hollowed out. That is, the front insertion slot 11' and the rear insertion slot 12' disclosed in the above embodiment also fall within the scope of the front insertion slot and the rear insertion slot as defined in the claims of this invention. Of course, it is preferable to design the front insertion slot 11 and the rear insertion slot 12 to have outer walls, which can increase the structural strength of the front insertion slot 11 and the rear insertion slot 12.

[0032] Optimal design, such as Figure 4-4 The front insertion slot 11, rear insertion slot 12, limiting slot 13, limiting groove 143 and process groove 144 on the positioning reinforcement block 14 of the fixed seat 1b are all symmetrically arranged along the longitudinal center line and the lateral center line of the fixed seat 1b, respectively. This allows the wiper connection base 2b to be installed on the fixed seat 1b in a 180-degree mirror image from front to back, so that the wiper connection assembly 10b can simultaneously meet the wiper adaptation requirements of both left-hand drive and right-hand drive vehicles.

[0033] like Figures 6-1 to 6-3 The present invention also discloses a windshield wiper. Taking the wiper connection assembly 10b of the third embodiment as an example, it further includes an elastic support member 3, a rubber strip 4, a flow guide sleeve 5, and an end buckle 6. The rubber strip 4 is clamped between two elastic support members 3, and two upward-curving folds 31 are formed in the middle of each elastic support member 3. Figure 4-3The fixed base 1b has a gap area on the sliding groove 15 along its length direction. A protrusion 16 is provided in the gap area. The front and rear end faces of the protrusion 16 abut against the corresponding folded edges 31 to limit the elastic support component 3 relative to the fixed base 1b along the length direction. However, the limiting of the elastic support component 3 and the fixed base along the length direction is not limited to the above-mentioned technical means. For example, an outward-facing slot is opened on the side of the elastic support component 3, and a corresponding protrusion is provided on the inner end of the side wall of the fixed base, thereby limiting the two along the length direction. The two flow guide sleeves 5 are respectively inserted on the elastic support component 3, and the flow guide sleeves 5 and the rubber strip 4 are fixed by the end buckle 6. Of course, in the prior art, it is not necessarily the end buckle 6 that is used to fix the flow guide sleeves 5 and the rubber strip 4. Those skilled in the art can use other prior art to fix the flow guide sleeves 5 and the rubber strip 4 (such as the prior art disclosed in CN109795452A).

[0034] The wiper made using the above structure, especially the wiper connection assembly 10b of the third embodiment, can minimize the height of the wiper connection assembly 10b, reduce its wind resistance area, and effectively improve its wiping cleanliness.

[0035] The above embodiments and illustrations are not intended to limit the product form and style of the present invention. Any appropriate changes and modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A wiper connection assembly, comprising a mounting base (1a, 1b) and a wiper connection base (2a, 2b), wherein the wiper connection base (2a, 2b) is detachably fixed to the mounting base (1a, 1b), characterized in that: The wiper connection base (2a, 2b) is provided with a connector mating part (A) and a fixed seat connection part (B) from top to bottom. The fixed seat connection part (B) is provided with a front insertion block (21) and a rear insertion block (22) at both ends along the length direction. The front insertion block (21) and the rear insertion block (22) are rigid structures. The mounting bases (1a, 1b) are respectively provided with front insertion slots (11, 11') and rear insertion slots (12, 12') at the positions corresponding to the front insertion block (21) and the rear insertion block (22). The distance X1 between the upper wall end face (111) of the front insertion slot and the upper wall end face (121) of the rear insertion slot (12, 12') is smaller than the distance X2 between the two ends of the front insertion block (21) and the rear insertion block (22), so that the wiper connecting base (2a, 2b) inserts the front insertion block (21) only in an inclined manner. Insert the front plug (21) into the front plug (11, 11'), then move it horizontally and back, insert the rear plug (22) into the rear plug (12, 12') until the wiper connection base (2a, 2b) can no longer move from front to back relative to the fixed base (1a, 1b). At this time, at least part of the front plug (21) is inserted into the front plug (11, 11') and at least part of the rear plug (22) is inserted into the rear plug (12, 12'), thereby restricting the displacement of the wiper connection base (2a, 2b) relative to the fixed base (1a, 1b) in the height direction. An elastic locking part (T) is added to the relative mating part of the wiper connecting base (2a, 2b) and the fixed base (1a, 1b) in the area that can be operated by hand. The elastic locking part (T) is used to restrict the wiper connecting base (2a, 2b) from moving from back to front relative to the fixed base (1a, 1b). If the relative displacement of the front plug-in block (21) and the front plug-in groove (11, 11'), and the rear plug-in block (22) and the rear plug-in groove (12, 12') cannot be restricted in the width direction, at least one limiting mating part (S1, S2) shall be added to the relative mating part of the wiper connecting base (2a, 2b) and the fixed base (1a, 1b) to restrict the relative displacement of the two in the width direction.

2. The wiper connection assembly as described in claim 1, characterized in that: The rear part of the fixed base connecting part (B) and the vertical end face adjacent to the rear insertion block (22) are constructed as a rear stop surface (221). The rear stop surface (221) and the upper wall end face (121) of the rear insertion groove (12, 12') abut against each other to limit the movement of the wiper connecting base (2a, 2b) relative to the fixed base (1a, 1b) from front to back.

3. The wiper connection assembly as described in claim 1, characterized in that: The wiper connection base (2a, 2b) is configured on the top of the fixed base (1a, 1b). There are two elastic locking parts (T). Each elastic locking part (T) consists of an elastic cantilever (23) configured on the side of the fixed base connection part (B) and a limiting groove (13) configured on the fixed base (1a, 1b). The elastic cantilever (23) is arranged along the length direction of the fixed base connection part (B). A downwardly extending locking block (231) is provided at the free end of the elastic cantilever (23). The limiting groove (13) is opened at the top of the fixed base (1a, 1b) at a position relative to the locking block (231). The locking block (231) is locked in the limiting groove (13).

4. The wiper connection assembly as described in claim 3, characterized in that: The side of the fixed base connecting part (B) is designed to be hollow, at least in the region of the elastic cantilever (23), so that the side forms an outer wall (W1) and an inner wall (W2) spaced apart from the outside to the inside. The outer wall (W1) has an intersecting inverted L-shaped notch (232) along the length and height directions, thereby constructing the elastic cantilever (23) at the outer wall (W1). The fixed end of the elastic cantilever (23) is located at one end adjacent to the rear insertion block (22). The locking block (231) can be shifted in position along the width and height directions when subjected to force; the fixed base (1a, 1b) is also provided with a relief groove (132) at the inner end of the limiting groove (13), which extends along the length direction and communicates with the limiting groove (13). The relief groove (132) is used to provide relief space for the locking block (231) of the elastic cantilever (23) that deforms inward, so that the locking block (231) of the elastic cantilever (23) can be displaced in the length direction of the relief groove (132).

5. The wiper connection assembly as described in claim 4, characterized in that: The locking block (231) of the elastic cantilever (23) has a first vertical abutment surface (2311) facing the front end, and the limiting slot (13) has a second vertical abutment surface (131) located at the front end. The locking block (231) forms a guide slope (2312) that slopes backward from bottom to top on the side opposite to the first vertical abutment surface (2311).

6. The wiper connection assembly as described in any one of claims 3 to 5, characterized in that: The thickness of the elastic cantilever (23) transitions from thin to thick from the region adjacent to the fixed end to the free end.

7. The wiper connection assembly as described in any one of claims 4 to 6, characterized in that: The side of the wiper connection base (2a, 2b) forms a protrusion (P) in the region of the elastic cantilever (23), thereby expanding the space between the outer wall (W1) and the inner wall (W2).

8. The wiper connection assembly as described in claim 1, characterized in that: The fixed base connection part (B) of the wiper connection base (2b) includes two support blocks (24) that extend along the length direction and are spaced apart. A horizontal reinforcing plate (25) is added between the two support blocks (24) or above the two support blocks (24). The front insertion block (21) is located at the lower part of the support block (24) and protrudes forward. The rear insertion block (22) is located at the lower part of the support block (24) and protrudes backward. There are two front insertion slots (11, 11'), which are located on both sides of the front part of the fixed base (1b, 1b') respectively. There are two rear insertion slots (12, 12'), which are located on both sides of the rear part of the fixed base (1b, 1b') respectively. A positioning reinforcement block (14) is protruding from the middle of the fixed base (1b, 1b') along the length direction. The positioning reinforcement block (14) is located between the two front insertion slots (11, 11') and between the two rear insertion slots (12, 12') respectively. The two outer side walls (141) of the positioning reinforcement block (14) and the two inner side walls (241) of the support block (24) together form the limiting engagement part. The limiting engagement part is defined as the first limiting engagement part (S1). At the same time, the elastic snap-fit ​​part (T) configured on the wiper connection base (2a, 2b) as described in any one of claims 3 to 7 is used to set the elastic cantilever (23) of the elastic snap-fit ​​part (T) on the support block (24).

9. The wiper connection assembly as described in claim 8, characterized in that: The bottom end face of the transverse reinforcing plate (25) forms a first positioning reference surface (251); the top end face of the positioning reinforcing block (14) forms a second positioning reference surface (142). The height of the front insertion slot (11, 11') is slightly greater than the height of the front insertion block (21), and the height of the rear insertion slot (12, 12') is slightly greater than the height of the rear insertion block (22). When the wiper connecting base (2b) and the fixing seat (1b, 1b') are installed in place, the top end face (212) of the front insertion block and the top of the front insertion slot form a second positioning reference surface (142). The mutual limiting of the wall (112) and the mutual limiting of the top end face (222) of the rear insertion block and the top inner wall (122) of the rear insertion groove are used to realize the displacement limitation of the wiper connection base (2b) relative to the fixed seat (1b, 1b') from bottom to top. The mutual abutting cooperation between the first positioning reference surface (251) of the transverse reinforcing plate (25) and the second positioning reference surface (142) of the positioning reinforcing block (14) is used to realize the displacement limitation of the wiper connection base (2b) relative to the fixed seat (1b, 1b') from top to bottom.

10. The wiper connection assembly as claimed in claim 9, characterized in that: The top end face of the positioning reinforcement block (14) is flush with the top end face of the front insertion slot (11, 11') and the top end face of the rear insertion slot (12, 12'), and the three together form the second positioning reference surface (142).

11. The wiper connection assembly as claimed in claim 9, characterized in that: The front end of the bottom end face of the front plug (21) and the rear end of the bottom end face of the rear plug (22) are respectively provided with clearance slopes (26).

12. The wiper connection assembly as described in claim 8, characterized in that: The front end face of the front insertion block (21) is provided with a clearance slope (26), and the front insertion block (21) and the front insertion groove (11, 11') form a transition fit along the height direction, and the rear insertion block (22) and the rear insertion groove (12, 12') form a transition fit along the height direction. The bottom end face of the front insertion block (21) and the bottom end face of the rear insertion block (22) abut against the top end face of the fixing seat (1b, 1b'). On 17b), the displacement of the wiper connection base (2b) relative to the fixed base (1b, 1b') from top to bottom is restricted; by the mutual limiting of the top end face (212) of the front insertion block and the top inner wall (112) of the front insertion groove, and the mutual limiting of the top end face (222) of the rear insertion block and the top inner wall (122) of the rear insertion groove, the displacement of the wiper connection base (2b) relative to the fixed base (1b, 1b') from bottom to top is restricted.

13. The wiper connection assembly as described in claim 8, characterized in that: The transverse reinforcing plate (25) has several downward protruding limiting blocks (252). The positioning reinforcing block (14) has a limiting groove (143) at a position relative to the limiting block (252). The limiting groove (143) extends along the length direction of the positioning reinforcing block (14), and its length is greater than the length of the limiting block (252). Its width is adapted to the width of the limiting block (252). Each of the limiting blocks (252) and each of the limiting grooves (143) together construct the limiting mating part, which is defined as the second limiting mating part (S2).

14. The wiper connection assembly as described in claim 13, characterized in that: There are a total of four limiting blocks (252), which are arranged in pairs at intervals near the two front plug-in blocks (21) and near the two rear plug-in blocks (22).

15. The wiper connection assembly as described in claim 14, characterized in that: Each of the aforementioned limiting grooves (143) is provided with at least one drainage through hole (1431).

16. The wiper connection assembly as claimed in any one of claims 3, 8, or 13, characterized in that: The front insertion slots (11, 11'), rear insertion slots (12, 12'), and limiting slots (13) of the fixed seats (1a, 1b) are symmetrically arranged along the longitudinal center line (Y1) and the lateral center line (Y2) of the fixed seats (1a, 1b), respectively. If the fixed seats (1b, 1b') are configured with positioning reinforcement blocks (14), and the positioning reinforcement blocks (14) are configured with limiting grooves (143), then the limiting grooves (143) are also symmetrically arranged along the longitudinal center line (Y1) and the lateral center line (Y2) of the fixed seats (1b, 1b').

17. The wiper connection assembly as claimed in any one of claims 1 to 16, characterized in that: The relative displacement of the front insertion block (21) and the front insertion slot (11, 11'), and the rear insertion block (22) and the rear insertion slot (12, 12') in the width direction are restricted.

18. A windshield wiper, characterized in that: It includes the wiper connection assembly as described in any one of claims 1-17.

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