Adapter and wiper

Abstract

An adapter is used as a connecting piece between a wiper support assembly and a driving arm; the adapter is a hollow cuboid member with an open downward inner cavity, and has at least two first side walls A and a top wall C; the inner cavity of the adapter is provided with a support connecting portion, which includes two second side walls E, and a pivot connecting portion is arranged on each second side wall E, and the pivot connecting portion is used for being pivotally connected with a pivot connecting seat on the wiper support assembly; the adapter is inserted into the inner end of the front part of the driving arm, and is fixed with the driving arm through a locking piece arranged on the first side wall A and capable of producing a position offset.

Description

Technical Field

[0001] This invention relates to the field of windshield wipers, and more particularly to an adapter for connecting a wiper bracket assembly to a drive arm, and a wiper equipped with the adapter. Background Technology

[0002] Please refer to patent document CN211075825U, such as Figure 1A novel wiper arm and wiper blade connection structure has been disclosed in the industry, including a drive arm 100, a connector 200 (named "adapter" in this invention), a fixing seat 300, and a wiper blade 400. The wiper blade 400 is mounted on the fixing seat 300. The two opposite side walls 210 and 210a of the connector 200 are respectively provided with second hinge mechanisms 220 and 220a (hinge holes or hinge shafts). The fixing seat 300 is built into the receiving cavity 230 of the connector 200. The two opposite side walls 310 and 310a of the fixing seat 300 are respectively provided with first hinge mechanisms 320 and 320a (hinge shafts or hinge holes). The first hinge mechanisms 320 and 320a of the fixing seat 300 and the second hinge mechanisms 220 and 220a of the connector 200 pivotally cooperate with each other, so that the connector 200 is rotatably mounted on the fixing seat 300. Meanwhile, each of the two opposite side walls 210, 210a of the connector 200 is provided with a first latching mechanism 240, 240a (elastic boss), and the drive arm 100 has a connector head 110. A receiving cavity 111 for accommodating the connector 200 is provided in the connector head 110. Each of the two side cavity walls 112, 112a of the receiving cavity 111 is provided with a second latching mechanism 113, 113a (hole) that latches and engages with the first latching mechanism 240, 240a.However, the above structure has a defect. The fixed seat cavity 230 includes at least two parallel and opposite side walls 210, 210a of the connector 200. The side walls 210, 210a simultaneously construct the first latching mechanism 240, 240a and the second hinge mechanism 220, 220a. The side walls 210, 210a are configured as elastic cantilever arms at the positions of the first latching mechanism 240, 240a. When the elastic cantilever arms are pressed by external force, their positional offset direction is towards the fixed seat 300. Therefore, in order to allow the elastic cantilever arms to have inward displacement space, the side walls 210, 210a cannot be opposite to the side walls of the fixed seat 300 at least at the positions of the first latching mechanism 240, 240a. This inevitably reduces the lateral contact area between the connector 200 and the fixed seat 300, causing the windshield wiper to be unable to properly engage the drive arm 100 during wiping operations. The connector 200 and the fixed base 300 are prone to vibration in the lateral direction. At the same time, the second hinge mechanisms 220 and 220a provided on the two side walls 210 and 210a of the connector 200 are hinge holes. Under the same material and thickness conditions, the strength is reduced. Since the length of the two side walls 210 and 210a is limited, in order for the elastic cantilever to produce elastic deformation, a notch of sufficient length needs to be opened in the two side walls 210 and 210a. The elastic cantilever is located at the front of the two side walls 210 and 210a. At the same time, the second hinge mechanism 220 and 220a are hinge holes. The hinge holes can only be set at the approximate middle position of the two side walls 210 and 210a and at the rear end of the fixed end of the elastic cantilever. Therefore, the shortest length of the connection between the fixed end of the elastic cantilever and the hinge hole is 2-3mm. When the wiper is repeatedly wiping, this connection is prone to breakage, thereby reducing the service life of the product.

[0003] In view of this, the inventor conducted in-depth research on the aforementioned deficiencies in the prior art, which led to the creation of this case. Summary of the Invention

[0004] The first objective of this invention is to provide an adapter that utilizes two outer sidewalls as mating contact surfaces for connection with a drive arm, and at least one of the two outer sidewalls has a region capable of generating positional offset, while ensuring that the adapter can establish a stable pivot connection with the pivot connector of the wiper bracket assembly, thereby reducing axial wobble of the adapter relative to the pivot connector.

[0005] A second object of the present invention is to provide a windshield wiper that includes the aforementioned adapter.

[0006] To achieve the first objective of the present invention, the present invention discloses an adapter, which serves as a connecting component between a wiper bracket assembly and a drive arm, the adapter including a drive arm connecting portion and a bracket connecting portion;

[0007] The drive arm connection has a downward-facing receiving cavity, and at least one side of the drive arm connection has a locking member that can generate positional displacement. By changing the position of the locking member, the drive arm connection can be detachably fixed to the front of the drive arm.

[0008] The bracket connection is disposed within the accommodating cavity and has at least one pivot connection, through which the adapter is pivotally connected to the wiper bracket assembly;

[0009] The drive arm connecting part has at least a gap space between the side with the locking member and the side of the bracket connecting part adjacent to it, and the drive arm connecting part and the bracket connecting part have mechanical support structures respectively by means of their own material properties and / or by increasing their own wall thickness and / or by adding connecting blocks in the gap space.

[0010] With the above structure, the adapter is divided into a drive arm connection part and a bracket connection part from the outside to the inside, and each part performs different functions. The drive arm connection part, located on the outer perimeter, is mainly used to achieve a stable connection with the front of the drive arm, while the bracket connection part, located on the inner perimeter, is mainly used to establish a stable pivot connection with the pivot connection seat of the wiper bracket assembly. Since the locking element with position offset is located on the side of the drive arm connection part, and the pivot connection part is located on the side of the bracket connection part, and there is a gap between the side of the drive arm connection part and the side of the bracket connection part, the negative structural effects of the two components on the corresponding side will not be superimposed, thereby improving the stability of the adapter's connection between the wiper bracket assembly and the drive arm.

[0011] Furthermore, the bracket connecting part is located in a component that has a physical connection with the pivot connecting part, and the height of this component along its length is greater than the height of the two sides of the opposite drive arm connecting part and its connecting block, at least in the forward and backward adjacent areas from the pivot connecting part.

[0012] Furthermore, the component forms a guide surface along its length, extending forward and backward from the pivot connection portion on its bottom end face, to increase the swing amplitude of the adapter relative to the wiper bracket.

[0013] The inventive concept behind the two additional structural designs mentioned above is to increase the contact area between the bracket connecting part and the pivot connecting seat of the wiper bracket assembly on the side where the component that has a physical connection with the pivot connecting part is located. Under the premise of meeting the height limit of the adapter design, if the length of the bracket connecting part along the height direction is longer, the contact area between the bracket connecting part and the pivot connecting seat will be larger, and the stability of the pivot connection between the two will be better, which can minimize the axial wobble of the adapter relative to the pivot connecting seat.

[0014] To achieve the second objective mentioned above, the present invention also discloses a windshield wiper that includes the aforementioned adapter. The adapter is used to connect the wiper bracket assembly and the drive arm. The wiper using this adapter has a more stable connection with the drive arm, and the wiper is less prone to slight vibrations during wiping, resulting in high wiping quality. Attached Figure Description

[0015] The specific description given as a non-limiting example better explains what the invention includes and how it can be practiced. Furthermore, this description refers to the accompanying drawings, in which:

[0016] Figure 1 A schematic diagram of patent document CN211075825U;

[0017] Figure 2 and Figure 3 This is a schematic diagram showing two angles of the adapter 2a of the present invention;

[0018] Figure 4 This is a bottom-view perspective view of the adapter 2a of the present invention;

[0019] Figure 5 This is a front view of the adapter 2a of the present invention;

[0020] Figure 6 This is a bottom view of the adapter 2a of the present invention;

[0021] Figure 7 Exploded view of the adapter 2a and the front part of the drive arm of the present invention;

[0022] Figure 8 This is a combined diagram of the adapter and the front of the drive arm of the present invention;

[0023] Figure 9 This is a top-view view of the adapter and the front of the drive arm of the present invention.

[0024] Figure 10 This is a schematic diagram of the adapter 2b of the present invention;

[0025] Figure 11 for Figure 10 A bottom view of adapter 2b;

[0026] Figure 12 for Figure 10 Exploded view of adapter 2b and wiper bracket assembly;

[0027] Figure 13 for Figure 10 A diagram showing the combination of adapter 2b and the wiper bracket assembly;

[0028] Figure 14 This is a bottom view of the adapter 2c of the present invention. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0030] The "front" and "rear" directions of the adapter correspond to the distance between the aforementioned component and the power end of the drive arm. "Front" refers to the side away from the power end of the drive arm, and "rear" refers to the side close to the power end of the drive arm. For ease of understanding, the orientation of "front" and "rear" in this invention is consistent with the direction of the reference numerals in the accompanying drawings.

[0031] As defined by those skilled in the art, a wiper bracket assembly includes at least a wiper bracket, a wiper blade, and a pivot connector (such as a hinge) disposed in the middle of the wiper bracket for hinged connection with an adapter. Figure 12 (One example of a pivot connector 200 is given). The wiper bracket can be a framed bracket, a frameless bracket composed of springs, or a hybrid bracket composed of a framed bracket and springs. The wiper bracket has a wiper blade fixed directly or indirectly at its bottom. The wiper bracket is used to transmit the lateral force applied by the drive arm to the wiper blade for reciprocating swing and to drive the wiper blade to adhere tightly to the windshield of the vehicle.

[0032] like Figure 7 and Figure 9 The invention discloses a drive arm 1 disclosed in patent document CN211075825U. The front part 10 of the drive arm is a U-shaped groove component. The front part of the two side walls 14 of the U-shaped groove component is provided with a limiting groove 11, and the bottom of the side wall 14 is provided with at least a pair of inwardly bent edges 12. The drive arm 1 with this structure can be adapted to the adapter disclosed in this invention.

[0033] First embodiment of adapter 2a:

[0034] like Figure 2-9The adapter 2a includes a drive arm connecting part I, a bracket connecting part II, and several connecting blocks III. The drive arm connecting part I includes two first side walls A, a front wall B, a top wall C, and a rear wall D to form a cuboid-like component with a downward-facing accommodating cavity 100. Each first side wall A has a notch 221 at its front, so that the two first side walls A form an elastic cantilever 22 in the vertical projection area of ​​the notch 221. Each elastic cantilever 22 is provided with a limiting block 27 at a position relative to the limiting slot 11. The limiting block 27 is a locking element 27. The front end of the limiting block 27 is provided with a stop surface 271. The stop surface 271 of the limiting block 27 abuts against and engages with the inner wall (front notch edge 111) of the limiting slot 11, thereby limiting the forward displacement of the adapter 2a relative to the front part 10 of the drive arm (during the wiping process, the wiper will generate an outward centrifugal force relative to the drive arm). Preferably, the notch 221 is located at the position where the first side wall A is adjacent to the top wall C and the front wall B respectively, and is opened from front to back basically along the contour formed by the top wall C and the front wall B. That is, the abutting surface 271 of the limiting block 27 is located in front of the fixed end of the elastic cantilever 22 rather than behind it. This design makes it less likely that the elastic cantilever 22 will be squeezed and bent when the limiting block 27 is subjected to force, thereby minimizing the risk of the limiting block 27 disengaging from the limiting groove 11 of the drive arm and causing locking failure. Preferably, the side of the limiting block 27 opposite to the abutting surface 271 forms a guide slope 272, which facilitates the limiting block 27 sliding into the limiting groove 11 of the front part 10 of the drive arm. Preferably, the front part of the elastic cantilever 22 extends outward and forward with an L-shaped fold. The L-shaped fold is configured as a pressing part 26 of the elastic cantilever 22, which is convenient for manual pressing. When an external force is applied to the pressing part 26, the elastic cantilever 22 will be driven to deform inward elastically. Preferably, the curvature of the bend 261 of the L-shaped fold is matched with the curvature of the front ends of the two side walls 14 of the front part 10 of the drive arm. The bend 261 of the L-shaped fold also serves as one of the blocking parts that limit the rearward displacement of the adapter 2a relative to the front part 10 of the drive arm. Preferably, the two elastic cantilever arms 22 are arranged in a flared shape from back to front, that is, the distance between the two free ends of the two elastic cantilever arms 22 is greater than the distance between the two fixed ends. This arrangement also makes it less likely for the elastic cantilever arms 22 to bend inward when they are pressed backward by the abutment surface 271 of the limiting block 27 by the front part 10 of the drive arm. Each of the first sidewalls A has a plurality of spaced first positioning reference parts 222 on its outer wall. By controlling the dimensional machining accuracy of the outer end face of the first positioning reference part 222 rather than the dimensional machining accuracy of the entire first sidewall A, the width of the two first sidewalls A of the drive arm connecting part I can be well controlled. This allows for better control of the fitting gap between the two first sidewalls A of the drive arm connecting part I and the inner walls of the two sidewalls 14 of the front part 10 of the drive arm, making the connection between the two more stable.

[0035] like Figure 3 A step portion 23 is provided at the front part (non-elastic cantilever 22 region) of the top wall C and / or the two first side walls A, and the step portion 23 is located in front of the limiting block 27. The step portion 23 can serve as a blocking part to limit the rearward displacement of the adapter 2a relative to the front part 10 of the drive arm. The bottom of the two first side walls A is located above the folded edge 12 of the front part 10 of the drive arm, thereby limiting the downward displacement of the adapter 2a relative to the front part 10 of the drive arm.

[0036] Preferably, in order to facilitate the insertion of the adapter 2a into the cavity of the U-shaped groove member of the front part 10 of the drive arm, the rear part of the two first sidewalls A of the drive arm connecting part I forms a tapered part that gradually narrows from front to back. The tapered part disclosed in this embodiment is composed of two guide relief slopes 24.

[0037] The bracket connection part II includes two second sidewalls E and at least two connecting walls F. The two second sidewalls E and the connecting walls F extend downward from the inner end of the top wall C. The two second sidewalls E are respectively spaced apart from the two first sidewalls A. The pivot connection part is disposed on the two second sidewalls E. Therefore, the bracket connection part II as a whole is a component that has a physical connection with the pivot connection part. The pivot connection part can be configured as a pivot hole 21a (e.g., according to the setting of the pivot connection seat on the wiper bracket assembly 300) according to the configuration of the pivot connection seat. Figure 4 ) or a protruding pillar 21b (such as Figure 6 Preferably, the pivot hole 21a disclosed in this embodiment is formed by opening a first arc-shaped groove 211a on the second side wall E, and forming a second arc-shaped groove 212a on the outer wall of the second side wall E at a position opposite to the first arc-shaped groove 211a. The first arc-shaped groove 211a and the second arc-shaped groove 212a can be staggered and spliced ​​to form a pivot hole 21a. Compared with the traditional pivot hole (through hole) which is directly opened on the second side wall E (not shown in the figure), with this structure, the mold can be used by default to make a core (punch) structure for through holes, which reduces the complexity of the mold structure and the space occupied. More mold units can be arranged on the injection molding machine, thereby improving production efficiency and reducing production costs. The two connecting walls F are horizontally placed between the two second side walls E and are located at the front and rear of the second side walls E respectively. In this embodiment, the rear ends of the two second side walls E extend to the rear wall D of the drive arm connecting part I. Therefore, the rear wall D serves as one of the connecting walls F of the bracket connecting part II, while the other connecting wall F is set at the front end of the two second side walls E. The height of the connecting wall F will not be higher than the height of the two second side walls E at the intersection with the connecting wall F. Of course, the number and position of the connecting walls F are not limited to the above scheme. Those skilled in the art can increase the number of connecting walls F or arrange them in a reasonable position. In short, the purpose of setting the connecting walls F is to increase the bending strength of the two second side walls E.

[0038] like Figure 2 In order to reduce the injection molding cost of opening pivot holes 21a and protrusions 21b on the two second sidewalls E of the bracket connection part II, it is preferable that the top wall C of the drive arm connection part I forms a hollow part 25 in the region relative to the pivot connection part.

[0039] Preferably, to increase the bending strength of the first sidewall A and the second sidewall E, a plurality of connecting blocks III are provided between the first sidewall A and the second sidewall E. In this invention, the quantity of "a plurality of" is defined as greater than or equal to 2. Figure 4 It reveals that four connecting blocks III are respectively set between the two first sidewalls A and the two second sidewalls E, and Figure 6 It is revealed that three connecting blocks III are respectively set between the two first sidewalls A and the two second sidewalls E. Of course, no connecting blocks III are set in the area of ​​the first sidewall A located in the elastic cantilever 22. Preferably, one of the connecting blocks III is set at the fixed end of the elastic cantilever 22 to increase the strength of the fixed end of the elastic cantilever 22.

[0040] Preferred, such as Figure 4 and Figure 5 Since the pivot connection portion disclosed in this embodiment is a pivot hole 21a, the second sidewall E has a notch below the pivot hole 21a. The length of the second sidewall E along the length direction of the forward adjacent region and the rear adjacent region located at the notch is greater along the height direction than the length of the two first sidewalls A and their connecting block III of the opposite drive arm connection portion I; and Figure 10 and Figure 11Since the pivot connection portion disclosed in this embodiment is a protruding post 21b, the length of the second sidewall E along the length direction in both the forward and rearward adjacent regions located at the protruding post 21b is greater than the length along the height direction of the two first sidewalls A and their connecting block III of the opposite drive arm connection portion I. The length of this adjacent region can be adaptively adjusted according to the size of the wiper. Generally, the larger the wiper size, the greater the length of the adjacent region. Of course, if the second sidewall E has a sufficiently high distance from the bottom end face 201 of the pivot connection seat, when the adapter 2a pivots and swings, the front and rear ends of the two second sidewalls E of the bracket connection seat and the connecting wall F will not interfere with each other with the bottom end face of the pivot connection seat, and the second sidewall E as a whole... The length along the height direction can be greater than the length along the height direction of the first sidewall A. Compared to the adapter disclosed in CN211075825U as prior art, which only has one sidewall, the height of this sidewall must match the distance between the inner top wall 15 of the front part 10 of the drive arm and the folded edge 12. Therefore, it is impossible to increase the contact area between the sidewall and the two sides of the pivot connection seat by additionally increasing the height of the sidewall. However, since the height of the second sidewall E of the bracket connection seat is not restricted by the distance between the inner top wall 15 of the front part 10 of the drive arm and the folded edge 12, the contact area between the second sidewall E and the two sides of the pivot connection seat can be increased by increasing the height of the second sidewall E, thereby increasing the stability of the connection between the adapter 2a and the pivot connection seat. Preferably, a plurality of spaced second positioning reference parts 400 are provided at the inner ends of the two second sidewalls E. The dimensional accuracy of the mating end face of the second positioning reference part 400 is easier to control (compared to controlling the dimensional accuracy of the entire inner wall of the second sidewall E). Furthermore, the pivot connector is a very common prior art, and those skilled in the art may also refer to it as a fixing seat, hinge seat, or connecting seat, etc. This pivot connector is fixed to the wiper bracket, such as the fixing seat 310a disclosed in prior art CN211075825U, or the present invention as... Figure 12 The disclosed pivot connector 200, or the fixing seat 3 as disclosed in CN214874711U, all have a common structure, namely, they all form mating surfaces on both sides. These mating surfaces on both sides will abut and support the corresponding positions of the adapter, thereby limiting the vertical swing of the adapter relative to the mating surfaces on both sides of the pivot connector.

[0041] A more preferred design is that the second sidewall E gradually decreases in height from the pivot connection portion forward and backward along its length (of course, when the pivot connection portion is a pivot hole 21a, the height of the second sidewall E gradually decreases from the notch portion forward and backward), that is, at least at the bottom end face of the area adjacent to the front and rear ends of the pivot connection portion, a guide surface 29 is formed to increase the swing amplitude of the adapter 2a relative to the wiper bracket, such as... Figure 5The longitudinal section of the revealed guide surface 29 consists of two straight edges 291 located at the notch and a hypotenuse 292 connecting the two straight edges, as shown below. Figure 10 The disclosed guide surface 29, lacking any notch, is directly composed of a straight edge and two beveled edges connecting the two ends of the straight edge. Of course, those skilled in the art can, under the inspiration of this inventive concept, design the guide surface 29 as an arc-shaped surface that is higher in the middle and lower on both sides. This design allows the bottoms of the two second sidewalls E of the bracket connection part II to approach the bottom end face 201 of the pivot connection seat 200 as closely as possible (see reference). Figure 13 Furthermore, when the adapter 2a pivots relative to the pivot connector 200, the bottom of the two second sidewalls E of the adapter 2a will not interfere with the bottom end face 201 of the pivot connector 200, which can maximize the contact area between the two second sidewalls E of the adapter 2a and the two sides of the pivot connector 200, and further increase the stability of the connection between the adapter 2a and the pivot connector 200 on the wiper bracket.

[0042] Second embodiment of adapter 2b:

[0043] like Figures 10 to 13 The present invention discloses a second embodiment of adapter 2b, whose structure and inventive concept are basically the same as the first embodiment of adapter 2a. However, since the pivot connecting seat 200 of the wiper bracket assembly 300 has a guide positioning plate 202, a longitudinal notch is formed in the middle of the rear wall D. A bend perpendicular to the rear wall D is formed at the free end of the longitudinal notch. The top of the bend is fixed to the inner end of the top wall C. A relief groove 28 is constructed by the two bends. The relief groove 28 can be inserted into the guide positioning plate 202.

[0044] Third embodiment of adapter 2c:

[0045] like Figure 14This invention discloses a third embodiment of adapter 2c, whose structure and inventive concept are basically the same as the first embodiment of adapter 2a. However, the pivot connection part of the bracket connection part II disclosed in this embodiment is not set on the two second side walls E, but is set in the space constructed by the two second side walls E. The pivot connection part is a rectangular block 21c, which is the component that has a physical connection with the pivot connection part. A pivot groove 211c is opened in the middle of the rectangular block 21c. At the same time, in order to facilitate injection molding and reduce material costs, the rectangular block 21c is preferably designed to be hollow inside. In order to increase the strength of the pivot groove 211c, a reinforcing rib plate 212c is added in the hollow cavity and adjacent to the pivot groove 211c. Preferably, since the pivot connection is not located on the two second sidewalls E of the bracket connection II, the height of the two second sidewalls E is flush with the height of the first sidewall A. However, the length of the two sides of the rectangular block 21c along the height direction, at least in the area adjacent to the pivot groove 211c in the forward and backward adjacent areas, is designed to be greater than the length along the height direction of the two first sidewalls A and their connecting block III opposite to it. At the same time, the bottom end face of the rectangular block 21c can also be designed as a guide surface that is high in the middle and low on both sides. The inventive concept used in the above two technical features is consistent with the design concept of the height of the two second sidewalls E and the guide surface 29 of the adapter 2a in Embodiment 1, and will not be repeated. At the same time, the rear end of the two second sidewalls E in this embodiment does not extend to the rear wall D of the drive arm connection I. The connecting wall F located at the rear of the two second sidewalls E is connected to the rear wall D by adding at least two reinforcing ribs 30 to increase the overall strength of the cavity component of the drive arm connection I.

[0046] like Figure 12 , 13 This invention provides a windshield wiper using any of the aforementioned adapters 2a, 2b, and 2c. The wiper includes a wiper bracket assembly 300 and adapters 2a, 2b, and 2c. Adapters 2a, 2b, and 2c are pivotally connected to the pivot connection seat 200 of the wiper bracket assembly 300 via bracket connection part II. The following is a brief description of how to install a wiper using adapter 2b onto the drive arm 1. Holding the wiper, with the rear of adapter 2b facing the front end (insertion end) of the drive arm front part 10, insert the two first sidewalls A of the drive arm connection part I of adapter 2b from front to back into the vertical space constructed by the top wall 15 and the folded edge 12 of the drive arm front part (U-groove member) 10, and the horizontal space constructed by the two sidewalls 14. This prevents adapter 2b from moving up and down or left and right relative to the drive arm front part 10 until the limiting block 27 of adapter 2b elastically deforms and locks into the limiting groove 11 of the drive arm front part (see...). Figure 9This prevents the adapter 2b from moving forward relative to the front part 10 of the drive arm. At this time, the stepped part 23 of the adapter 2b is opposite to the front end of the front part 10 of the drive arm, preventing the adapter 2b from moving forward relative to the front part 10 of the drive arm, thus enabling the wiper to be installed on the drive arm 1. When it is necessary to remove the wiper from the drive arm 1, simply press the pressing part 26 by hand to disengage the limiting block 27 from the limiting slot 11 of the front part 10 of the drive arm, and drive the wiper adapter 2b to be pulled out from the insertion end of the front part 10 of the drive arm from back to front.

[0047] 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. An adapter (2a, 2b, 2c) serving as a connecting component between a wiper bracket assembly (300) and a drive arm (1), wherein the front part (10) of the drive arm is a U-shaped groove member, the front portions of the two sidewalls (14) of the U-shaped groove member are respectively provided with a limiting groove (11), and the bottom of the sidewalls (14) are provided with at least a pair of inwardly bent flanges (12), characterized in that: The adapters (2a, 2b, 2c) include a drive arm connecting part (I) and a bracket connecting part (II); The drive arm connection (I) has a downward-facing receiving cavity (100), which is constructed by at least two first sidewalls (A) and a top wall (C). At least one of the first sidewalls (A) has a notch (221) extending from front to back at a position adjacent to the top wall (C), forming an elastic cantilever (22) at the front of the first sidewall (A). A limiting block is provided on the elastic cantilever (22), which is defined as a locking element (27) capable of generating positional displacement. The adapters (2a, 2b, 2c) are inserted from front to back into the cavity of their U-shaped groove members relative to the front part (10) of the drive arm, and the locking element (27) is used to connect the drive arm connection (I) to the cavity. The limiting slots (11) are nested together to restrict the forward displacement of the adapters (2a, 2b, 2c) relative to the front part of the drive arm (10). A step (23) is provided in the non-elastic cantilever (22) area of ​​the top wall (C) and / or the two first side walls (A). The step (23) is located in front of the locking member (27). The step (23) restricts the backward displacement of the adapters (2a, 2b, 2c) relative to the front part of the drive arm (10). The bottom of the two first side walls (A) is located above the folded edge (12) of the front part of the drive arm (10), thereby restricting the downward displacement of the adapters (2a, 2b, 2c) relative to the front part of the drive arm (10). Thus, the drive arm connecting part (I) is detachably fixed to the front part of the drive arm (10). The bracket connection (II) is disposed in the receiving cavity (100) and has at least one pivot connection, through which the adapter (2a, 2b, 2c) is pivotally connected to the wiper bracket assembly (300); The drive arm connecting part (I) has at least a gap space between the side with the locking member (27) and the side of the bracket connecting part (II) adjacent to it, and the drive arm connecting part (I) and the bracket connecting part (II) have mechanical support structures respectively by means of their own material properties and / or by increasing their own wall thickness and / or by adding connecting blocks (III) in the gap space.

2. The adapter (2a, 2b, 2c) as described in claim 1, characterized in that: The bracket connection (II) is located in a component that has a physical connection with the pivot connection. The length of this component along the length direction, at least in the forward and backward adjacent regions from the pivot connection, is greater than the length along the height direction of the two sides of the opposite drive arm connection (I) and its connecting block (III).

3. The adapter (2a, 2b, 2c) as described in claim 2, characterized in that: The component forms a guide surface (29) along its length from the pivot connection to the front and rear bottom end faces, which increases the swing amplitude of the adapter (2a, 2b, 2c) relative to the wiper bracket assembly (300).

4. The adapter (2a, 2b, 2c) as described in any one of claims 1 to 3, characterized in that: The drive arm connection (I) further includes a front wall (B) and a rear wall (D) to form a cuboid cavity component with an opening facing downwards to receive a cavity (100). The notch (221) provided at the front of each of the first side walls (A) is opened substantially along the outline constructed by the top wall (C) and the front wall (B), and the two elastic cantilever arms (22) are arranged in a flared shape from back to front.

5. The adapter (2a, 2b, 2c) as described in claim 4, characterized in that: The front part of the elastic cantilever (22) extends outward and forward with an L-shaped fold, which is configured as the pressing part (26) of the elastic cantilever (22).

6. The adapter (2a, 2b, 2c) as described in claim 4 or 5, characterized in that: The bracket connection part (II) includes two second sidewalls (E) and at least two connecting walls (F). The two second sidewalls (E) and the connecting walls (F) extend downward from the inner end of the top wall (C). The two second sidewalls (E) are respectively spaced apart from the two first sidewalls (A). The pivot connection part is disposed on the space formed by the two second sidewalls (E) or between the two second sidewalls (E). The two connecting walls (F) are transversely placed between the two second sidewalls (E) and are respectively located at the front and rear of the second sidewalls (E).

7. The adapter (2a, 2b, 2c) as described in claim 6, characterized in that: When the rear ends of the two second sidewalls (E) extend to the rear wall (D) of the drive arm connection (I), the rear wall (D) serves as one of the connecting walls (F) of the bracket connection (II); when the rear ends of the two second sidewalls (E) do not extend to the rear wall (D) of the drive arm connection (I), the connecting wall (F) located at the rear of the two second sidewalls (E) is connected to the rear wall (D) by adding at least one reinforcing rib (30).

8. The adapter (2a, 2b, 2c) as described in claim 6, characterized in that: When the pivot connection is disposed on the two second sidewalls (E), the pivot connection can be configured as a pivot hole (21a) or a protrusion (21b), and the top wall (C) of the drive arm connection (I) forms a hollow part (25) in the area relative to the pivot connection; when the pivot connection is disposed between the two second sidewalls (E), the pivot connection is a rectangular block (21c), and a pivot groove (211c) is opened in the middle of the rectangular block (21c).

9. The adapter (2a, 2b, 2c) as claimed in claim 6, characterized in that: A longitudinal notch is formed in the middle of the rear wall (D), and a bend perpendicular to the rear wall (D) is formed at the free end of the longitudinal notch. The top of the bend is fixed to the inner end of the top wall (C), and a relief groove (28) is constructed by the two bends.

10. A windshield wiper, characterized in that: It includes the adapter (2a, 2b, 2c) according to any one of claims 1-9, the adapter (2a, 2b, 2c) for realizing the connection between the wiper bracket assembly (300) and the drive arm (1).

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