Wiper blade adapter, wiper and its adapted wiper arm

Abstract

The application provides a wiper blade adapter which is a connecting piece between a wiper support assembly and a wiper arm; the wiper blade adapter further comprises a wiper arm locking part, which comprises a first accommodating channel for allowing a wiper arm connecting head to pass through and supporting the wiper arm connecting head, an inner cavity of the first accommodating channel has a bottom supporting surface, the first accommodating channel is composed of a fixed segment and a cantilever segment from back to front, an extrusion block is arranged in the inner cavity of the first accommodating channel and located on the cantilever segment, a front end surface and a side end surface of the extrusion block correspondingly form a longitudinal limiting matching surface and a side extrusion surface respectively, and the side extrusion surface and the bottom supporting surface jointly form an L-shaped supporting plane.

Description

Technical Field

[0001] This application relates to the field of windshield wiper technology, and in particular to a wiper blade adapter, a windshield wiper with the wiper blade adapter, and a wiper arm that is compatible with the wiper blade adapter. Background Technology

[0002] like Figure 1 As shown, Chinese patent application "A Scraping Device" (CN 107187424A) discloses a scraping device, which includes a connecting element 22a for stable connection with a scraper blade, a scraper blade adapter 12a, and a scraper arm connector (equivalent to the scraper arm adapter in the original text) 10a. The scraper blade adapter 12a has a mounting portion and a coupling portion 24a, which is pivotally hinged to the connecting element 22a. The coupling portion 24a includes an offset fixing member 18a, which releasably fixes the scraper arm connector 10a to the scraper blade adapter 12a. It also has a locking member 20a, which is integrally constructed with the connecting element 22a. The locking member 20a is used to lock the scraper arm connector 10a in the event of failure of the fixing member 18a, so as to prevent the scraper blade adapter 12a from separating from the scraper arm. With this configuration, the connecting element 22a cannot be connected to other different types of wiper blade adapters, making the wiper bracket assembly with the connecting element 22a essentially dedicated to a specific purpose, reducing its adaptability. Simultaneously, due to the limited contact area between the fixing element 18a and the wiper arm connector 10a, the locking mechanism of the fixing element 18a is prone to failure, affecting the stability of the connection between the wiper blade adapter 12a and the wiper arm connector 10a. Furthermore, with the above structure, the coupling element 24a of the wiper blade adapter 12a can reciprocate between the release and operating positions relative to the connecting element 22a, with a maximum swing range of approximately 13°. Therefore, theoretically, a wiper using the aforementioned wiper blade adapter 12a cannot support a swing angle between the wiper arm and the glass exceeding 13°; otherwise, if the fixing element 18a fails to lock, the wiper may easily detach from the wiper arm, compromising driving safety. Summary of the Invention

[0003] This application aims to at least partially solve one of the technical problems in the aforementioned technologies. Therefore, the primary objective of this application is to provide a wiper adapter with a simple structure, easy assembly with the wiper arm, and a stable connection between the two. This wiper adapter is compatible with a large number of conventional wiper bracket assemblies with hinged seats, and allows for a larger swing angle between the wiper adapter and the wiper bracket assembly, further increasing its adaptability.

[0004] A second objective of the present invention is to provide a windshield wiper that includes the aforementioned wiper adapter, and a windshield wiper using such an adapter.

[0005] The third objective of this invention is to provide a scraper arm that can be adapted to the aforementioned scraper adapter. Compared with the scraper arms disclosed in the prior art, this scraper arm has a simpler structure and lower processing cost.

[0006] To achieve the first objective of this invention, this invention discloses a wiper adapter, which serves as a connector between the wiper bracket assembly and the wiper arm;

[0007] The scraper arm includes a straight rod segment, the front end of which forms a scraper arm connector. At least one notch is formed on the longitudinal side of the scraper arm connector, and a protrusion is provided in front of the notch. The protrusion forms a stop surface facing the notch.

[0008] The wiper adapter has a hinged mounting portion for realizing a swing hinge between the wiper adapter and the wiper bracket assembly;

[0009] The scraper adapter further includes a scraper arm locking part, which includes:

[0010] A first receiving channel is provided for the scraper arm connector to pass through and for supporting and limiting it. The inner cavity of the first receiving channel has a bottom support surface. The cavity wall of the first receiving channel is composed of a fixed section and a cantilever section from back to front. At least the inner wall contour of the fixed section matches the outer contour of the straight rod section of the scraper arm to limit the relative displacement between the straight rod section of the scraper arm and the inner cavity wall of the first receiving channel in the lateral direction. The cantilever section includes at least one bottom support surface. The cantilever section is constructed such that when it is only subjected to longitudinal force and the material has not reached the limit of plastic deformation, the bottom support surface of the cantilever section will not shift downward. A pressing block is protruding on the inner wall of the cantilever section. The front end face of the pressing block and the lateral end face relative to the notch of the scraper arm connector respectively form a longitudinal limiting mating surface and a lateral pressing surface.

[0011] A clearance section is located in front of the extrusion block and is used to accommodate the protrusion of the scraper arm connector.

[0012] A closed surface is provided in front of the relief section, which is used to limit the forward displacement of the scraper arm connector relative to the scraper arm locking part in the longitudinal direction.

[0013] By means of a position-shiftable extrusion block, after the scraper arm and scraper adapter are assembled in place, the extrusion block can be released so that the longitudinal limiting mating surface and the lateral extrusion surface of the extrusion block are respectively aligned with the corresponding abutment surface and the inner top surface of the notch of the scraper arm connector, thereby fixing the scraper arm connector at the scraper adapter.

[0014] Through the above technical solution, at least one fixed section is formed in the first receiving channel, through which the straight rod section of the scraper arm passes. This reduces the lateral sway between the scraper arm and the scraper adapter during the scraping process. Simultaneously, a pressing block is provided on the cantilever section. When the pressing block is in a released state, its longitudinal limiting mating surface abuts against the abutting surface of the scraper arm protrusion, preventing the scraper arm from detaching from the first receiving channel of the scraper adapter. When unlocking is required, only external force is applied to the cantilever section, causing the pressing block to shift position, thus facilitating the unlocking of the scraper arm from the scraper adapter. The contact area between the pressing block and the abutting surface of the scraper arm protrusion disclosed above is significantly larger than that of the prior art CN. The contact area between the extrusion block (referred to as fixing member 18a in the patent document) and another notch (referred to as fixing gap 34a in the patent document) disclosed in 107187424A is such that the present invention can ensure a stable connection between the wiper arm and the wiper adapter without the need for an additional safety device. Furthermore, due to the absence of a safety device, the swing angle between the wiper adapter and the wiper bracket assembly can be increased, and the wiper adapter can be adapted to wiper bracket assemblies with conventional hinge seats, thereby greatly increasing the adaptability of the wiper adapter.

[0015] Furthermore, two longitudinal notches are opened parallel to each other in the longitudinal direction on the front cavity wall of the first receiving channel. The cavity wall covered by the two longitudinal notches forms a cantilever section. The extrusion block is disposed on the cantilever section and is located on the path of the protrusion of the scraper connector traveling in the longitudinal direction of the first receiving channel.

[0016] Furthermore, the first receiving channel is formed by the bottom wall, the first side wall, the second side wall and the top wall to form a hollow component, the inner cavity wall contour of which basically matches the shape of the straight rod section of the scraper arm, and the extrusion block is offsetly protruding on the side of the bottom wall adjacent to the second side wall; the cantilever section has the longitudinal notch opened on the side of the second side wall and the bottom wall away from the extrusion block, respectively, or the longitudinal notch is opened on the side of the second side wall away from the extrusion block and the first side wall, respectively.

[0017] Through the above design, the cantilever section is set differently from the solution disclosed in the prior art CN 107187424A. The opening direction of its notch is longitudinal rather than lateral. In a further innovative design, the cantilever section includes two intersecting components, a bottom wall and a second side wall. Therefore, when forming the cantilever section, assuming the same consumables are used, and considering only the forces along the longitudinal direction (when the wiper is wiping, the wiper adapter and the wiper arm generate centrifugal force, and the cantilever section will be subjected to compressive force along the longitudinal direction), the bending strength of the cantilever section of the present invention is significantly better than that of the prior art.

[0018] In one embodiment, the clearance section is a cavity that does not have elastic deformation, and its inner contour matches the contour of the protrusion of the scraper arm connector, which is used to accommodate and support the protrusion of the scraper arm connector.

[0019] If the front end of the protrusion of the scraper arm does not have an extension section, the stability of the connection between the scraper arm and the scraper adapter can be further increased by constructing a cavity into a relief section of the scraper adapter, and restricting the lateral relative displacement between the scraper arm connector and the scraper adapter by the cavity and the fixing section of the first receiving channel at the beginning and end, respectively.

[0020] In one embodiment, the scraper arm connector has an extension section at the front end of the protrusion, the width of the extension section being smaller than the width of the protrusion; the clearance section is a hollow section, the length of which is sufficient to accommodate the protrusion of the scraper arm connector, and a second receiving channel is added between the closed surface and the clearance section. The second receiving channel has no elastic deformation, and its inner cavity contour matches the contour of the extension section of the scraper arm connector, which is used to accommodate and support the extension section of the scraper arm connector.

[0021] When the scraper arm is provided with an extension section at the front end of the protrusion, by adding a second receiving channel at the front end of the relief section, the lateral relative displacement between the scraper arm connector and the scraper adapter can be restricted at the beginning and end by the fixing sections of the second receiving channel and the first receiving channel, respectively. This can further increase the stability of the connection between the scraper arm and the scraper adapter.

[0022] To achieve the second objective of the present invention, the present invention also discloses a windshield wiper, including a wiper bracket assembly and a wiper blade adapter as described in any of the preceding claims.

[0023] To achieve the third objective of the present invention, the present invention also discloses a scraper arm according to one embodiment, which is adapted to the scraper adapter described in any of the preceding claims. The scraper arm includes a straight rod segment, the front end of which forms a scraper arm connector. Only a notch is formed on the longitudinal side of the scraper arm connector. The notch has an inner top surface, and a protrusion is provided in front of the notch. The protrusion forms a stop surface on the side facing the notch. The width of the protrusion is smaller than the width of the straight rod segment.

[0024] The present invention also discloses another embodiment of the scraper arm, which has the same structure as the aforementioned scraper arm, except that an extension section is added to the front end of the scraper arm connector located at the protrusion, and the width of the extension section is smaller than the width of the straight rod section.

[0025] Compared with the scraper arm disclosed in the prior art CN 107187424A, the above-mentioned scraper arm omits the design of the fixed gap 34a disclosed in its patent document, making the structure simpler. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the scraping device in the prior art CN 107187424A;

[0027] Figure 2 This is an exploded three-dimensional schematic diagram of the wiper arm according to the first embodiment of this application;

[0028] Figure 3 This is a three-dimensional schematic diagram of the scraper adapter and the scraper arm of the second embodiment;

[0029] Figure 4 This is a three-dimensional schematic diagram of a windshield wiper including an embodiment of this application;

[0030] Figure 5 This is a schematic rear view of the scraper adapter of this application (including two embodiments).

[0031] Figure 6 This is a perspective view of an embodiment of the scraper adapter of this application;

[0032] Figure 7 According to Figure 5 A cross-sectional perspective view of the first embodiment of the scraper adapter of this application with section AA;

[0033] Figure 8 According to Figure 5 A cross-sectional perspective view of the second embodiment of the scraper adapter of this application with section AA;

[0034] Figure 9 A rear view schematic of an embodiment of the scraper adapter and scraper arm in an assembled state (including two embodiments).

[0035] Figure 10 According to Figure 5 A cross-sectional perspective view of the second embodiment of the scraper adapter of this application with section AA (including the scraper arm of the second embodiment);

[0036] Figure 11 This is a bottom view of the second embodiment of the scraper adapter of this application;

[0037] Figure 12 According to Figure 10 A sectional view of section BB;

[0038] Figure 13 According to Figure 5 Another perspective view of the scraper adapter of the present application with an AA section cut at another angle;

[0039] Figure 14a is a partial cross-sectional schematic diagram of one of the installation steps of the scraper arm in the second embodiment of the scraper adapter of this application and the second embodiment;

[0040] Figure 14b is a sectional view of section DD according to Figure 14a;

[0041] Figure 15a is a partial cross-sectional schematic diagram of the second embodiment of the scraper adapter of this application and the second step of the installation of the scraper arm of the second embodiment;

[0042] Figure 15b is a sectional view of section DD according to Figure 15a;

[0043] Figure 16a is a partial cross-sectional schematic diagram of the third step in the installation of the scraper arm in the second embodiment of the scraper adapter of this application;

[0044] Figure 16b is a sectional view of section DD according to Figure 16a;

[0045] Figures 17a and 17b are schematic diagrams of the disassembly steps for the scraper adapter and scraper arm;

[0046] Figure 18 A schematic diagram of a windshield wiper with a wiper blade adapter according to the third embodiment of this application;

[0047] Figure 19 This is a rear view of the third embodiment of the scraper adapter of this application. Detailed Implementation

[0048] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application; the relative front-rear positions involved in this invention are consistent with the directions indicated by the arrows shown in the accompanying drawings; the longitudinal direction is consistent with the length direction of the scraper arm.

[0049] refer to Figure 2 , Figure 4 ,in Figure 2The image shows an exploded view of a windshield wiper 100 with a wiper arm 3a. The wiper 100 includes a wiper blade adapter 1a and a wiper bracket assembly 2. The wiper bracket assembly 2 is formed by a connecting element 21 and a wiper blade assembly 22 fixedly connected together. The wiper blade assembly 22 includes a wiper blade 220 for wiping vehicle windows, a flow guide element 221, a base 223 for stable connection with the connecting element 21, and a spring (not shown) included within the cavity of the flow guide element 221. End caps 224 are provided at both ends of the wiper blade assembly 22 to at least partially close the wiper blade assembly 22. In one embodiment, the base 223 is integrally constructed with the connecting element 21. The flow guide element 221 is at least partially made of rubber and / or plastic. Of course, the above-described wiper bracket assembly is only one specific embodiment. Those skilled in the art can extend this wiper bracket assembly to wiper bracket assemblies made of framed wipers or hybrid wiper brackets, which will not be elaborated further here.

[0050] The connecting element 21 has a hinged channel 210 for pivotally connecting with the scraper adapter 1a, through which the scraper adapter 1a is pivotally connected. Specifically, refer to Figure 5 , Figure 6 The scraper adapter 1a has a hinge mounting part 11 and a scraper arm locking part 12. The hinge mounting part 11 has a hinge shaft 110. By hinged with the hinge channel 210, the connecting element 21 and the scraper adapter 1a form a seesaw-like swinging connection with the hinge shaft 110 as the swing axis in the longitudinal plane P1 direction. (Refer to...) Figure 5 The longitudinal plane P1 is defined as a plane that is parallel to or overlaps with the longitudinal direction of the scraper adapter 1a and bisects the hinge mounting portion 11.

[0051] refer to Figure 2The scraper arm 3a is formed by fixing a straight rod segment 31 and a scraper arm connector B1 together. Preferably, the scraper arm connector B1 and the straight rod segment 31 are integrally formed. "Integral formation" should be understood in particular as the materials being connected in a mating manner, for example, by welding and / or bonding, or more advantageously, as integrally formed, for example, by casting and / or by single-component or multi-component spraying methods. The scraper arm connector B1 has a notch B11 formed on its longitudinal side, and a protrusion B12 is provided in front of the notch B11. The protrusion B12 has a stop surface B111 on the side facing the notch B11, and the notch B11 has an inner top surface B112. It should be understood that, in a specific embodiment, the protrusion B12 is a component that constructs the notch B11, and thus abuts against the surface B111 or the side of the notch B11. It should also be emphasized that the scraper arm 3a described above has a significant difference from the scraper arm disclosed in the prior art CN 107187424A, which only has a notch B11 and defaults to the design of the fixed gap 34a.

[0052] Figure 5 , Figure 6 and Figure 7 It shows the use of with Figure 1 The scraper adapter 1a, which is fitted to the scraper arm connector B1, specifically includes a scraper arm locking part 12, which is used to install with the scraper arm connector B1. In a particularly advantageous embodiment, the scraper arm locking part 12 and the hinge mounting part 11 are arranged side by side along the width direction of the scraper adapter 1a, thereby effectively shortening the longitudinal length of the scraper adapter 1a. Simultaneously, the outer surface of the top of the scraper arm locking part 12 and the hinge mounting part 11 on the adjacent side together forms an aerodynamically advantageous windward surface C (e.g., ...). Figure 2 The combined effect of these two factors further enhances the overall aerodynamic performance of the blade adapter 1a.

[0053] The scraper arm locking part 12 includes a first receiving channel 121, a clearance section 123a, and a closing surface 124. The first receiving channel 121 is used for the scraper arm connector B1 to pass through, and after the scraper arm connector B1 is installed in place, it at least partially accommodates the scraper arm connector B1 to at least partially support the scraper arm connector B1. To adapt to the design of the windward surface C of the scraper adapter 1a, the first receiving channel 121 is inclined. This inclination is defined as the angle between the bottom support surface 1213 of the first receiving channel 121 and the horizontal reference plane P2 being less than 60° (e.g., ...). Figure 5 In this embodiment, they are approximately at a 45° angle.

[0054] More specifically, see reference Figure 7The first receiving channel 121 is composed of a fixed section 1211 and a cantilever section 1212 from back to front, while referring to... Figures 5 to 12 The first receiving channel 121 includes a hollow component formed by a bottom wall 1217, a first side wall 1214, a second side wall 1215, and an arc-shaped top wall 1216. The inner contour of the first receiving channel 121 matches the shape of the scraper arm straight rod section 31, and is basically quadrilateral. A cantilevered section 1212 that can be elastically reset is constructed in the cantilever section 1212 region. A longitudinal notch 120 is opened on each side of the cantilever section 1212. The opening direction of the longitudinal notch 120 is defined to be consistent with the longitudinal direction of the first receiving channel 121. Therefore, when the cantilever section 1212 is subjected to longitudinal compressive force, the force is entirely loaded onto the fixed end 12121 at the rear end of the cantilever section 12122. Its torsional moment is much smaller than that of cantilever sections disclosed in the prior art. While meeting the ultimate load capacity of the material itself, it is not easily bent or deformed elastically. In a more preferred embodiment, refer to... Figures 11 to 1 4. Longitudinal notches 120 are respectively formed on the second side wall 1215 and the bottom wall 1217. The longitudinal notches 120 are formed diagonally along the inner cavity of the first receiving channel 121, that is, the cross-sectional inner cavity contour of the fixed end of the cantilever section 1212 is L-shaped (e.g., Figure 12 Compared to the prior art, where the fixed end of the cantilever segment 1212 is a straight plane, the cantilever segment 1212 of this invention is less prone to bending and deformation; further optimized in design, the longitudinal notch 120 is opened in a direction parallel to the longitudinal plane P1, which facilitates the integral injection molding of the scraper adapter 1a. More preferably, as... Figure 11 To adjust the elastic deformation strength of the cantilever segment 1212, a material removal section 128 is provided at the bottom of the cantilever segment 1212, that is, at the bottom of the intersection of the second side wall 1215 and the bottom wall 1217, so that the wall thickness of the cantilever segment 1212 gradually increases from the free end to the fixed end. Of course, the setting of the cantilever segment can also refer to the technical features disclosed in the background art, which can be used as one embodiment of the cantilever segment 1212 of the first receiving channel 121 defined in this invention. However, the notch opening direction disclosed in this cantilever segment is the lateral direction rather than the longitudinal direction, and this cantilever segment only relies on a straight fixed segment between the two lateral notches for support. Therefore, when subjected to longitudinal extrusion force, it is more prone to bending elastic deformation compared to the cantilever segment disclosed in this invention.

[0055] like Figure 8 , 13The cantilever segment 1212 adopts and is located on the longitudinal travel path of the protrusion B12 with an extrusion block 122. The front end of the extrusion block 122 (i.e., after the scraper arm 3b is installed, the extrusion block 122 on the side opposite to the abutment surface B111) forms a longitudinal limiting mating surface 1221. The extrusion block 122 forms a lateral extrusion surface 1222 on the side opposite to the inner top surface B112. The bottom support surface 1213, together with the lateral extrusion surface 1222 and the second side wall 1215, respectively construct two L-shaped support planes 13a and 13b. More preferably, the outer end face of the cantilever segment 1212 is flush with the longitudinal limiting mating surface 1221 of the extrusion block 122, which is conducive to the abutment mating of the longitudinal limiting mating surface 1221 with the abutment surface B111 of the scraper arm 3b.

[0056] like Figure 8 A clearance section 123b is provided in front of the cantilever section 1212. The clearance section 123b has clearance space to accommodate the protrusion B12. In this embodiment, the clearance section 123b is a hollow design. In front of the clearance section 123b, there is also a closed surface 124 to restrict the longitudinal forward movement of the scraper arm connector B1.

[0057] Figure 2 and Figure 3 Two exemplary embodiments of scraper arms are shown respectively, wherein, Figure 3 The embodiment of scraper arm 3b shown is similar to Figure 2 The difference in the scraper arm 3a shown is that it is further provided with an extension section B13 extending longitudinally forward of the protrusion B12. The width of the extension section B13 is smaller than the width of the protrusion B12, which can further strengthen the connection between the scraper arm connector B1 and the scraper arm locking part 12. Figure 8 Correspondingly, it shows the relationship with Figure 3 The scraper adapter 1b that mates with the scraper arm 3b shown is... Figure 8 scraper adapter 1b and Figure 7 Compared to the scraper adapter 1a, a second receiving channel 129 is added between the closed surface 124 and the relief section 123b. The second receiving channel 129 is used to receive and support the extension section B13.

[0058] Figure 9 and Figure 10 This diagram illustrates an embodiment in which the scraper arm 3b and the scraper adapter 1b are installed in place. The scraper arm 3b is fixed inside the scraper adapter 1b by the pressing block 122. Figure 10 The scraper arm 3b installed on the scraper adapter 1b can be clearly seen.

[0059] To facilitate the unlocking and disengagement of the assembled scraper arm 3b from the scraper arm locking part 12 of the scraper adapter 1b, an outwardly extending pressing member 125 is added to the non-positioning plane of the cantilever section 1212 or the pressing block 122, such as... Figure 3 As shown, the pressing member 125 extends upward through the arc-shaped top wall 1216, which makes it convenient for the user to squeeze the pressing member 125 to drive the squeezing block 122 to shift its position. Of course, the pressing member 125 can also be set to extend outward horizontally (not shown in the figure).

[0060] refer to Figures 7 to 9 To better support the scraper arms 3a and 3b, a support fitting part 127 is constructed at the intersection of the bottom wall 1217 and the first side wall 1214 of the scraper arm locking part 12. In this embodiment, since the scraper arm locking part 12 and the hinge mounting part 11 are arranged side by side, the support fitting part 127 is actually constructed on a side wall 111 of the hinge mounting part 11 adjacent to the scraper arm locking part 12. Although the scraper adapters 1a and 1b are usually made of plastic, the two side walls 111 of the hinge mounting part 11 are constructed to be less susceptible to elastic deformation by external forces through conventional technical means such as setting reinforcing ribs and increasing wall thickness. The support fitting part 127 can effectively bear part of the downward pushing force from the scraper arm 3 applied to the first receiving channel 121, thereby reducing the force that the cantilever section 1212 has to bear and improving the reliability and stability of the cantilever section 1212.

[0061] refer to Figure 13 In order to enable the cantilever section 1212 to automatically offset during the installation of the scraper arm connector B1, so as to provide clearance space for the installation of the scraper arm connector B1, the pressing block 122 has a slope 1223, which gradually increases in height from back to front towards the end into which the scraper arm connector B1 is inserted.

[0062] exist Figure 10 In the illustrated embodiment, the width of the extension section B13 of the scraper arm connector B1 is L3, and the width of the scraper arm at the notch B11 is L4. The width L3 is not greater than the width L4, so that when the extension section B13 of the scraper arm connector B1 passes through the first receiving channel 121, it will not cause deformation of the cantilever section 1212. Only when the protrusion B12 passes through the first receiving channel 121 will the cantilever section 1212 deform, which is beneficial to the installation and use of the scraper arm 3b. Of course, theoretically, the width L3 of the extension section B13 of the scraper arm connector B1 is less than or equal to the width L1 of the protrusion B12, which is less than or equal to the width of the straight rod section L2. As long as L4 is less than L1, the connection between the scraper arm 3b and the scraper adapter 1b can be satisfied.

[0063] Figures 14a to 16b illustrate the specific installation steps of the scraper arm 3b on the scraper adapter 1b: Referring to Figures 14a and 14b, firstly, the scraper arm connector B1 passes sequentially through the fixed section 1211 and the cantilever section 1212 of the first receiving channel 121; then, referring to Figures 15a and 15b, the protrusion B12 abuts against and slides along the inclined surface 1223 of the extrusion block 122, thereby driving the extrusion block 122 to cause the cantilever section 1212 to elastically deform downwards; then, referring to Figures 16a and 16b, finally, the protrusion B12 falls into the clearance section 123a, and the cantilever section 1212 drives the extrusion block 122 to automatically elastically return to its original position, completing the installation. At this time, the longitudinal limiting mating surface 1221 of the extrusion block 122 and the abutting surface B111 of the scraper arm connector B1 are opposite each other, and the two have a partially overlapping interference area S in the longitudinal direction, while the extrusion... The lateral pressing surface 1222 of the pressure block 122 and the inner top surface B112 of the notch of the scraper arm connector B1 are opposite each other, and the extension section B13 of the scraper arm connector B1 is built into the second receiving channel 129. At this time, the front and rear parts of the scraper arm connector B1 are supported and confined in the second receiving channel 129 and the fixed section 1211 of the first receiving channel 121, respectively. No elastic deformation will occur at the above two positions. The scraper arm connector B1 is placed in the cantilever section 1212 (cantilever section 1212) of the first receiving channel 121, which can undergo elastic deformation, only at the position basically located at the notch B11. By adding the pressing block 122 to the cantilever section 1212, the bottom support surface 1213 forms the first L-shaped support plane 13a and the second L-shaped support plane 13b together with the lateral pressing surface 1222 of the pressing block 122 and the second side wall 1215, respectively (e.g., Figure 13 Because the bottom support surface 1213 is tilted as a whole, the bottom support surface 1213 disclosed in this embodiment forms a 45° angle with the horizontal reference plane P2, resulting in the first L-shaped support plane 13a and the second L-shaped support plane 13b being tilted as a whole. With the above arrangement, when the wiper bracket assembly 2 is connected to the wiper arm connector B1 through the wiper adapter 1b, compared with the technical solution disclosed in the background art, it can achieve a more stable connection between the wiper adapter 1b and the wiper arm connector B1 without the need for additional safety components. This is achieved by utilizing the larger overlapping interference area S (abutting contact area) between the longitudinal limiting surface 1221 of the pressing block 122 and the abutting surface B111 of the wiper arm 3b, supplemented by the auxiliary support of the support mating part 127 for the wiper arm connector B1, and the setting of the longitudinal opening 120 of the cantilever section 1212.

[0064] It is important to emphasize that, due to the overall inclined setting of the bottom support surface 1213, during the wiping process, the cantilever section 1212 of the wiper adapter 1b will be subjected to the longitudinal backward squeezing force of the wiper connector B1 due to centrifugal force. This will cause the cantilever section 1212 to undergo squeezing deformation. More specifically, at the position of the first L-shaped support plane 13a in the cantilever section 1212, the cantilever section 1212 will twist and deform in the direction of one of the normal planes of the bottom support surface 1213 or the lateral squeezing surface 1222. At the position of the second L-shaped support plane 13b in the cantilever section 1212, the cantilever section 1212 will twist and deform in the direction of one of the normal planes of the bottom support surface 1213 or the second side wall 1215. Since they share a common bottom support surface 1213, the cantilever section 1212 will undergo twisting deformation. 213. Therefore, once the deformation of the normal surface of the first L-shaped support plane 13a and the second L-shaped support plane 13 is synchronized, that is, if the first L-shaped support plane 13a undergoes a twisting deformation in the direction of the normal surface of the bottom support surface 1213, it will inevitably drive the second L-shaped support plane 13 to twist and deform in the direction of the normal surface of the bottom support surface 1213, and vice versa. Moreover, the twisting deformation of one surface of the cantilever segment 1212 will inevitably drive the linkage of the other surface, causing the other surface to twist and deform in the direction of the opposite surface of the scraper arm connector B1 until the surface and the opposite surface of the scraper arm connector B1 come into contact with each other, thereby preventing further twisting deformation of the cantilever segment 1212 and further ensuring the stable connection between the scraper adapter 1b and the scraper arm connector B1.

[0065] When the scraper arm connector B1 needs to be detached from the scraper adapter 1b, as shown in Figures 17a and 17b, simply press down on the pressing block 125 to drive the squeezing block 122 to shift downward until the squeezing block 122 no longer interferes with the abutting surface B111 of the scraper arm connector B1, that is, no longer prevents the protrusion B12 of the scraper arm 3. Then the scraper arm 3b can be pulled out from the first receiving channel 121 of the scraper adapter 1b.

[0066] It should be noted that the installation steps between the scraper arm 3a and the scraper adapter 1a are not fundamentally different from those between the scraper arm 3b and the scraper adapter 1b, and will not be repeated here. Of course, since the scraper arm 3a does not have an extension section, in order to make the connection between the scraper arm 3a and the scraper adapter 1a more stable, the clearance section 123a of the scraper adapter 1a is a cavity. This cavity does not have elastic deformation, and its inner cavity contour matches the contour of the protrusion B12 of the scraper arm connector B1. It is used to accommodate and support the protrusion B12 of the scraper arm connector B1. The front part (protrusion B12) and the rear part (straight rod section 31) of the scraper arm connector B1 are supported and limited in the cavity 123a and the fixed section 1211 of the first receiving channel 121, respectively. No elastic deformation will occur in the above two positions, thereby ensuring a stable connection between the scraper adapter 1a and the scraper arm 3a.

[0067] like Figures 18 to 19 The present invention also discloses a scraper adapter 1c, the inventive concept of which is basically the same as that of the aforementioned scraper adapters 1a and 1b. The main difference is that it discloses a feasible solution when the first receiving channel 122 of the scraper adapter 1c is not tilted, that is, the bottom support surface 1213a of the first receiving channel 121 is parallel to the horizontal reference surface P2. Similarly, the scraper arm connector B1 of the scraper arms 3a and 3b does not need to be tilted. It only needs to be horizontally inserted into the first receiving channel 121 of the scraper adapter 1c to achieve a stable connection between the scraper arms 3a and 3b and the scraper adapter 1c.

[0068] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present application.

Claims

1. A wiper adapter (1a, 1b, 1c) serving as a connector between a wiper bracket assembly (2) and a wiper arm (3a, 3b); The scraper arm (3a, 3b) includes a straight rod segment (31), the front end of which forms a scraper arm connector (B1). At least one notch (B11) is formed on the longitudinal side of the scraper arm connector (B1), and a protrusion (B12) is provided in front of the notch (B11). The protrusion (B12) forms a stop surface (B111) on the side facing the notch (B11). The wiper adapters (1a, 1b, 1c) have a hinged mounting portion (11) for achieving a hinge between the wiper adapters (1a, 1b, 1c) and the wiper bracket assembly (2); Its features are: The scraper adapters (1a, 1b, 1c) also include a scraper arm locking part (12), which includes: A first receiving channel (121) is provided for the scraper arm connector (B1) to pass through and for supporting and limiting it. The inner cavity of the first receiving channel (121) has a bottom support surface (1213). The cavity wall of the first receiving channel (121) is composed of a fixed section (1211) and a cantilever section (1212) from back to front. At least the inner cavity wall contour of the fixed section (1211) matches the outer contour of the straight rod section (31) of the scraper arm (3a, 3b) to limit the relative displacement of the straight rod section (31) of the scraper arm (3a, 3b) and the inner cavity wall of the first receiving channel (121) in the lateral direction. The cantilever section (1212) includes at least a bottom support surface (1213). 12) When constructed only under longitudinal force and before the material reaches the limit of plastic deformation, it will not cause the bottom support surface (1213) of the cantilever section (1212) to shift downward. A pressing block (122) is protruding on the inner wall of the cantilever section (1212). The pressing block (122) is set on the cantilever section (1212) and located on the path of the protrusion (B12) of the scraper arm connector (B1) along the longitudinal direction of the first receiving channel (121). The front end face of the pressing block (122) and the inner top surface (B112) relative to the notch (B11) of the scraper arm connector (B1) respectively form a longitudinal limiting mating surface (1221) and a lateral pressing surface (1222). A clearance section (123a, 123b) is provided in front of the extrusion block (122) for accommodating the protrusion (B12) of the scraper arm connector (B1). A closed surface (124) is provided in front of the relief section (123a, 123b), which is used to limit the forward displacement of the scraper arm connector (B1) relative to the scraper arm locking part (12) in the longitudinal direction; The first receiving channel (121) is a hollow component formed by the bottom wall (1217), the first side wall (1214), the second side wall (1215), and the top wall (1216). The outline of its inner cavity wall basically matches the shape of the straight rod section (31) of the scraper arm. The extrusion block (122) is offsetly protruding on the side of the bottom wall (1217) adjacent to the second side wall (1215). A longitudinal notch (120) is opened on the side of the second side wall (1215) and the bottom wall (1217) away from the extrusion block (122), thereby constructing the cantilever section (1212). The bottom support surface (1213) together with the second side wall (1215) and the lateral extrusion surface (1222) construct two L-shaped support planes (13a, 13b). The bottom support surface (1213) of the first receiving channel (121) is inclined relative to the horizontal reference plane P2. By means of the position-shiftable pressing block (122), after the scraper arm (3a, 3b) and the scraper adapter (1a, 1b, 1c) are assembled in place, the pressing block (122) can be released so that the longitudinal limiting mating surface (1221) and the lateral pressing surface (1222) of the pressing block (122) are respectively aligned with the corresponding abutment surface (B111) and the inner top surface (B112) of the notch (B11) of the scraper arm connector (B), thereby fixing the scraper arm connector (B1) at the scraper adapter (1a, 1b, 1c).

2. The scraper adapter (1a, 1b, 1c) as described in claim 1, characterized in that: The extrusion block (122) forms a guide slope (1223) that gradually increases in height from back to front at the end toward which the scraper arm connector (B1) is inserted.

3. The scraper adapter (1a, 1b, 1c) as described in claim 1, characterized in that: A pressing member (125) extending outward is fixed on the cantilever section (1212) of the first receiving channel (121), and the pressing member (125) facilitates the relative displacement of the longitudinal limiting mating surface (1221) of the extrusion block (122) relative to the blocking surface of the protrusion (B12).

4. The scraper adapter (1a, 1b, 1c) as described in claim 1, characterized in that: The hinged mounting part (11) of the scraper adapter (1a, 1b) is arranged side by side with the scraper arm locking part (12) along its width direction.

5. The scraper adapter (1a, 1b, 1c) as described in claim 4, characterized in that: A support fitting part (127) is formed at the intersection of the bottom wall (1217) of the first receiving channel (121) and the first side wall (1214). The support fitting part (127) overlaps with one of the side walls (111) of the hinge mounting part (11), so that the support fitting part (127) is configured to provide partial support for the bottom of the scraper arm connector (B1).

6. The scraper adapter (1a, 1b, 1c) as described in claim 1, characterized in that: A material removal section (128) is formed at the bottom of the intersection of the second sidewall (1215) and the bottom wall (1217) of the cantilever segment (1212) to adjust the elastic deformation strength of the cantilever segment (1212).

7. The scraper adapter (1a, 1b, 1c) as described in any one of claims 1-6, characterized in that: The clearance section (123a) is a cavity that does not have elastic deformation. Its inner cavity contour matches the contour of the protrusion (B12) of the scraper arm connector (B1). It is used to accommodate and support the protrusion (B12) of the scraper arm connector (B1).

8. The scraper adapter (1a, 1b, 1c) as described in any one of claims 1-6, characterized in that: When the scraper arm connector (B1) is provided with an extension section (B13) at the front end of the protrusion (B12), the width of the extension section (B13) is smaller than the width of the protrusion (B12); the relief section (123b) is a hollow section, the length of which is used to accommodate the protrusion (B12) of the scraper arm connector (B1), and a second receiving channel (129) is added between the closed surface (124) and the relief section (123b). The second receiving channel (129) does not have elastic deformation, and its inner cavity contour matches the contour of the extension section (B13) of the scraper arm connector (B1). It is used to accommodate and support the extension section (B13) of the scraper arm connector (B1).

9. The scraper adapter (1a, 1b, 1c) as described in claim 8, characterized in that: The distance between the lateral extrusion surface (1222) of the extrusion block (122) and the first sidewall (1214) is greater than or equal to the width of the extension (B13) of the scraper arm connector (B1).

10. A windshield wiper, characterized in that: Includes wiper bracket assembly (2) and wiper adapter (1a, 1b, 1c) as described in any of the preceding items.

11. A scraper arm, characterized in that: It is compatible with the scraper adapter (1a, 1b, 1c) described above. The scraper arm (3a, 3b) includes a straight rod segment (31). The front end of the straight rod segment (31) forms a scraper arm connector (B1). Only a notch (B11) is formed on the longitudinal side of the scraper arm connector (B1). The notch (B11) has an inner top surface (B112). A protrusion (B12) is provided in front of the notch (B11). The protrusion (B12) forms a stop surface (B111) on the side facing the notch (B11). The width L1 of the protrusion (B12) is less than or equal to the width L2 of the straight rod segment (31).

12. The scraper arm as described in claim 11, characterized in that: The scraper arm connector (B1) is further provided with an extension section (B13) at the front end of the protrusion (B12), and the width L3 of the extension section (B13) is less than or equal to the width L1 of the protrusion (B12) and less than or equal to the width L2 of the straight rod section (31).

13. The scraper arm as described in claim 12, characterized in that: The width L3 of the extension (B13) of the scraper connector (B1) is less than or equal to the width L4 of the notch (B11).

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