Integrated wiper bracket and boneless wiper thereof

Abstract

The application provides an integrated wiper support and a boneless wiper, wherein the wiper support is used for supporting an elastic supporting component, a mounting portion is arranged in the middle of the wiper support, the mounting portion is used for receiving a wiper arm, and the wiper arm extends outward along the length direction of the mounting portion at two ends of the mounting portion to support a support cover, the support cover is hollow in the inner cavity, the outer side surface of the support cover forms a flow guide surface which is beneficial to aerodynamics, and the support cover forms a streamlined body closed end at the end far from the mounting portion, so that the air flow guide performance is improved, and the wiping quality is improved.

Description

Technical Field

[0001] This invention relates to the field of windshield wiper technology in automotive parts, and particularly to an integrated windshield wiper bracket that combines the wiper sleeve and the wiper connector mounting base into one unit, and a frameless windshield wiper. Background Technology

[0002] Commercially available frameless wiper blades generally consist of a wiper blade rubber strip, a frameless wiper blade, a wiper sleeve, and plastic parts. The wiper sleeve is typically made of a soft, aging-resistant, and UV-resistant plastic material, used to wrap the frameless wiper blade, and forms a guide slope on its outer surface. The plastic parts include at least a wiper connection device for hinged connection with the wiper arm. This connection device generally includes a wiper connector base and a wiper connector. The wiper connector can be integrally formed with the wiper connection base, or it can be detachably / installed on the wiper connection base. Meanwhile, some wiper manufacturers have also developed another type of wiper structure, as disclosed in CN105270331A. Figure 1 The most significant difference is that the wiper sleeve made of soft material is replaced by a hard end cap 3', which is hinged to the central mounting part 2' in the longitudinal direction. Summary of the Invention

[0003] The primary objective of this invention is to propose an integrated wiper bracket that abandons the traditional frameless wiper design, which often requires an additional airflow guide sleeve, or is significantly different from the design disclosed in CN105270331A, which uses a central mounting part and end cap to guide and fix the elastic support component and wiper blade, while forming an airflow guide arc surface suitable for aerodynamic airflow on the central mounting part or end cap. This invention creatively combines the airflow guide sleeve and the wiper connector mounting base into one, forming an integrated wiper bracket design with an airflow guide surface.

[0004] The second objective of this invention is to propose an integrated wiper bracket. The wiper bracket with this structure has a low overall height, which can effectively reduce wind resistance and ensure that the wiper bracket has sufficient strength and is not easily bent or deformed even with a long overall length.

[0005] A third objective of this invention is to provide a wiper made using the wiper bracket disclosed above, and to improve the curvature radius of the pre-formed elastic support component, thereby further improving the adhesion between the wiper blade and the glass surface and greatly improving the wiping cleanliness of the wiper.

[0006] To achieve the first objective of the present invention, the present invention discloses an integrated wiper bracket, which is at least used to support an elastic support component, and the wiper bracket has a mounting part in the middle for receiving the wiper arm. Support covers extend outward from both ends of the mounting part along its length, and the outer surface of the support cover forms a guide surface that helps to reduce wind resistance generated during the wiper wiping process. The two support covers and the mounting part are integrally injection molded, and the total length of the wiper bracket is greater than 1 / 2 of the total length of the elastic support component; A receiving cavity for receiving the elastic support component is formed at the bottom of the support cover and the mounting part. The receiving cavity includes two guide limiting members spaced apart along the length direction and at least one longitudinal limiting part. Each guide limiting member is located in the area of ​​the support cover and has a contact surface for applying a pushing force to the elastic support component. It can directly or indirectly guide the elastic support component to be arranged along the length direction of the wiper bracket and limit the relative displacement between the elastic support component and the wiper bracket in the width and height directions. The longitudinal limiting part is used to limit the longitudinal displacement between the elastic support component and the wiper bracket by engaging with the corresponding snap-fit ​​part of the elastic support component.

[0007] The above technical solution provides an integrated wiper bracket, which combines the air guide sleeve and the wiper connector mounting base into one integrated wiper bracket. This changes the traditional frameless wiper which requires an additional air guide sleeve or an additional rigid end cap through hinges, simplifies the assembly process, and improves the product's service life.

[0008] Furthermore, the distance L1 between the two guide limiting members is between 1 / 3 and 2 / 3 of the total length of the elastic support member.

[0009] By increasing the span between the two guide limiting components, it can be ensured that when the elastic support component is installed on the two guide limiting components, the elastic support component can better extend and bear force, driving the two ends of the wiper blade to better fit the windshield surface.

[0010] To achieve the second objective of the present invention, the present invention discloses one embodiment in which the mounting part of the wiper bracket is a connecting seat, the connecting seat having a recessed base and two slots, the base having at least one supporting and limiting part, and the two slots being located at one end of the two supporting covers facing the base, the connecting seat being used to couple the connecting unit.

[0011] To achieve the second objective of the present invention, another embodiment is disclosed, wherein the mounting part of the wiper bracket includes a recessed support plane and a connector device. The connector device is integrally formed and protrudes from the support plane. The connector device can be made into a mating part that is directly hinged to the wiper arm, or into a mating part that is connected to the wiper connector.

[0012] This allows the wiper connector, which mates with the mounting section, to be positioned lower, thereby reducing the adverse effects of the lack of a guide surface on aerodynamic performance.

[0013] In some implementations of the above technical solutions, the wiper bracket is further provided with a metal reinforcing member at least at the mounting position. This metal reinforcing member can be integrally injection-molded into the wiper bracket, or separately fixed to the bottom end face of the housing. This enhances the strength of the wiper bracket with the recessed mounting portion. Furthermore, because the wiper bracket of this application is relatively long, the span between the two guide and limiting members is large, and the elastic support member is supported in the area where the support cover is located, the mounting portion is more prone to insufficient strength. Therefore, adding a metal reinforcing member can effectively enhance the strength of the wiper bracket.

[0014] Additionally, this invention also discloses an integrated frameless wiper blade, comprising: A wiper blade having, from top to bottom, two slots for laterally accommodating an elastic support member and a scraper blade; Two elastic support components, each of the elastic support components including at least one limiting groove opened in the lateral direction, the limiting groove being positioned opposite to the longitudinal limiting part; Two connecting pieces are located at the two ends of the two elastic support components, respectively, and are used to lock the two ends of the two elastic support components. The elastic support component is partially housed in the slot of the wiper blade, so that the limiting groove of the elastic support component is not covered by the slot of the wiper blade. The two elastic support components are respectively nested and locked in the two first slots of the wiper blade by two connectors, so as to form the first wiper blade assembly. It also includes a wiper bracket as described in any of the above embodiments, wherein two elastic support members of the first wiper blade assembly are fitted onto the guide limiting member of the wiper bracket, and the limiting groove of the elastic support member is engaged with the longitudinal limiting part of the wiper bracket to limit the relative displacement of the first wiper blade assembly and the wiper bracket along the length direction.

[0015] This invention also discloses an integrated frameless wiper, comprising: An elastic support component has a locking part on its upper surface, which is exactly opposite to the positioning block of the wiper bracket. A support plate, the support plate is long and strip-shaped, and has a first receiving groove and a second receiving groove in sequence from top to bottom. The first receiving groove is used to insert an elastic support component, and at least one opening end is opened at the top of the first receiving groove for the locking part to be exposed. The second receiving groove forms a slit for the wiper blade to be inserted. At the same time, a side wing extending to both sides along its width direction is provided at the junction of the first receiving groove and the second receiving groove. The two end buckles are located at both ends of the bearing clamp plate, and the elastic support component and wiper blade are locked to both sides of the bearing clamp plate through the end buckles. A wiper blade and the elastic support component are respectively inserted into the second receiving groove and the first receiving groove of the bearing clamp, and are locked by buckles at both ends to form a second wiper blade assembly. It also includes the aforementioned wiper bracket. Specifically, the receiving cavity of the wiper bracket includes two sidewalls spaced apart and substantially parallel along its width direction. Each sidewall forms an inwardly extending groove for the bearing plate to pass through. A horizontally placed connecting piece is formed at the top of the groove. The groove and the connecting piece are configured as guide and limiting members. At the same time, a positioning block is provided outwardly on the side end of the connecting piece of at least one of the guide and limiting members facing the elastic support member. The two end faces of the positioning block along the length direction are configured as longitudinal limiting portions. The two wings of the bearing plate of the second wiper blade assembly pass through the groove, and the locking portion on the elastic support member and the positioning block on the wiper bracket are locked together to restrict the relative displacement of the second wiper blade assembly and the wiper bracket along the length direction.

[0016] To achieve the third objective of this invention, in any of the above-described embodiments of the frameless wiper, the elastic support component is a longitudinally extending, curved, arc-shaped sheet. The elastic support component forms a first arc-shaped member and a second arc-shaped member at both ends from its center point O. The first arc-shaped member has a first bending base point, and the second arc-shaped member has a second bending base point. The first arc-shaped member has the smallest radius of curvature at the first bending base point, and the second arc-shaped member has the smallest radius of curvature at the second bending base point. When the elastic support component is horizontally stationary without applied force, the height of the line connecting the first and second bending base points is small. At the height of the center point O; and the positions of the first bending base point and the second bending base point are exactly opposite to the position of the guide limiting member, that is, the push force applied by the wiper arm to the wiper bracket 1a is directly transmitted to the elastic support member through the guide limiting member, and the force point is exactly located on the two bending base points of the elastic support member. This allows the elastic support member to transmit the force to both sides with the first bending base point and the second bending base point as the center of force, so that the wiper blade can bear the push force applied by the elastic support member more evenly, and finally make the two ends of the wiper blade better fit the surface of the windshield, improving the cleanliness of the wiper blade.

[0017] The definition of the bending reference point can be achieved by measuring a certain arc length before and after each point on the longitudinal centerline of the elastic support component or on a longitudinal line parallel to it. For example, taking an arc length of 20mm as an example, the radius of curvature corresponding to the arc length of 10mm before and after each point is measured, which is the radius of curvature of that point. The point with the smallest radius of curvature is selected as the bending reference point (the 10mm arc length points at both ends of the elastic support component are ignored). The length of the selected arc length is related to the total length of the elastic support component. The longer the length, the larger the span of the selected arc length. Attached Figure Description

[0018] The specific description given as a non-limiting example better explains what this application includes and how it can be implemented; furthermore, the description refers to the accompanying drawings, in which: Figure 1 This is a schematic diagram of the existing three-dimensional structure; Figure 2 This is a perspective view of a wiper in an assembled state according to an embodiment of this application; Figure 3 This is an exploded three-dimensional schematic diagram of a windshield wiper component according to an embodiment of this application; Figure 4 This is a perspective view of a wiper bracket and wiper connector according to an embodiment of this application; Figure 5 This is a perspective view of a wiper bracket according to an embodiment of this application; Figure 6 This is a top view schematic diagram of a wiper bracket according to an embodiment of this application; Figure 7 According to Figure 6 A cross-sectional view along the AA direction; Figure 8 According to Figure 6 A cross-sectional view along the BB direction, showing that a wiper blade has been installed. Figure 9 This is a top view schematic diagram of a wiper bracket according to an embodiment of this application; Figure 10 This is a cross-sectional view of a series of installation steps for a wiper arm according to an embodiment of this application; Figure 11 A side view of a prior art elastic support component; Figure 12 This is a side view of an elastic support member according to an embodiment of this application; Figure 13 This is an exploded three-dimensional schematic diagram of a windshield wiper component according to an embodiment of this application; Figure 14 This is a perspective view of an embodiment of the elastic support component and wiper bracket of this application; Figure 15This is a side view and a cross-sectional view along the AA direction of a windshield wiper according to an embodiment of this application; Figure 16 This is a cross-sectional view and a partially enlarged schematic diagram of a windshield wiper according to an embodiment of this application; Figure 17 This is an exploded three-dimensional schematic diagram of a windshield wiper component according to an embodiment of this application; Figure 18 This is a perspective view of a windshield wiper according to an embodiment of this application. Implementation

[0019] Embodiments of the present invention are described in detail below, examples of which are illustrated 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 the present invention, and should not be construed as limiting the present invention.

[0020] like Figure 2-3 As shown, this invention discloses a frameless windshield wiper 100a, which includes a wiper bracket 1a, a connecting unit 2, two elastic support components 5a, a wiper blade 6, and two connecting parts 7a. Figure 2-3 The wiper bracket 1a has a mounting part 11a in the middle. Support covers 12 extend outward from both ends of the mounting part 11a along its length direction. The two support covers 12 are integrally injection molded with the mounting part 11a. The inner cavity of each support cover 12 is hollow and is provided with a number of grid-like reinforcing ribs 121 to enhance its overall strength. The outer surface of the support cover 12 forms an aerodynamic guide surface, and the support cover 12 forms a streamlined closed end 122 at the end away from the mounting part 11a.

[0021] like Figure 4 The present invention discloses a first embodiment of the mounting part 11a of the wiper bracket 1a. The mounting part 11a is a connecting seat 11a. For more detailed description, please refer to CN106240529A and CN110843730A. Here, only a brief description is given. The connecting seat 11a has a recessed base 111 and two slots 112. The base 111 has at least one supporting and limiting part 1111. The two slots 112 are respectively located at one end of the two supporting covers 12 facing the base 111. The connecting seat 11a is used to couple the connecting unit 2. The connecting unit 2 has locking structures 23a and 23b at both ends that mutually limit and cooperate with the two slots 112, and at least one locking structure 23a can achieve positional offset, such as by using an elastic buckle to achieve positional offset. The connecting unit 2 is placed on the base 111, and its bottom has a locking engagement part 231 that limits and cooperates with the support limiting part 1111. At the same time, the connecting unit 2 is fixed to the base 111 in a detachable manner by means of the locking structures 23a and 23b at both ends. A fitting part D is formed on the connecting unit 2 that is directly hinged to the wiper arm 3 (e.g. Figure 4 (as shown), or it can be made into a mating part that connects to the wiper head (see patent document CN110843730A). Figure 14 (and its textual description). It should be noted that the support limiting part 1111 described in this invention is equivalent to the protruding rib disclosed in CN110843730A, and the locking and fitting part 231 is equivalent to the insertion and fitting surface in CN110843730A. Similarly, the connecting unit 2 disclosed in this invention can also be designed to rotate 180° freely and lock and fit with the connecting seat 11a to meet the usage requirements of left-hand drive and right-hand drive vehicles, which will not be elaborated here. Although the structure of the mounting part 11a has been disclosed as the structure of the wiper connection device of the frameless wiper, the wiper connection device of the traditional frameless wiper is a separate component, which is used in conjunction with the guide sleeve (usually made of soft material). There is no design scheme that integrates the mounting part 11a directly with the integrated wiper bracket 1a.

[0022] like Figure 17 The present invention discloses a second embodiment of the mounting part 11b of the wiper bracket 1a. The mounting part 11b of the wiper bracket 1a includes a recessed support plane 113 and a connector device 2'. The connector device 2' is integrally formed and protrudes from the support plane 113. The connector device 2' can be made into a mating part that is directly hinged to the wiper arm 3, or it can be made into a mating part that is connected to the wiper connector, and then connected to the wiper arm 3 through the wiper connector.

[0023] like Figure 18This invention discloses a third embodiment of the mounting portion 11c of the wiper bracket 1a. The mounting portion 11c of the wiper bracket 1a forms at least two side wings 110 arranged along its width direction, with an insertion channel 111 between the two side wings 110 for inserting the wiper arm. At least one connecting rod 115 is transversely placed between the two side wings 110, and this connecting rod 115 is used to connect the wiper connector. A more preferred design is that the outer surfaces of the side wings 110 and the guide surface of the support cover 12 of the wiper bracket 1a have a streamlined transition. It should be noted that the mounting portions 11a and 11b of the wiper bracket 1a disclosed in the previous two embodiments both adopt a sunken design to reduce the overall size of the mounting portions 11a and 11b, thereby reducing wind resistance. However, the third embodiment of the mounting portion 11c reduces the overall windward area of ​​the wiper bracket 1a by forming a streamlined transition between the outer surfaces of the side wings 110 and the guide surface of the support cover 12, thus effectively reducing wind resistance.

[0024] like Figure 4-7 As shown, the wiper bracket 1a forms a receiving cavity 13 for receiving the elastic support member 5a at least in the area of ​​the support cover 12 adjacent to the mounting portion 11a and the bottom of the mounting portion 11a. The receiving cavity 13 includes at least two first sidewalls 10a and second sidewalls 10b spaced apart along its width and arranged substantially parallel to each other. In this embodiment, the first sidewall 10a is disposed on the windward side, and the length of the first sidewall 10a is less than the length of the second sidewall 10b, and the height of the first sidewall 10a is... The height H1 is less than the height H2 of the second sidewall 10b. The two ends of the first sidewall 10a are connected to the ends of the second sidewall 10b by setting arc-shaped transition sections 101a. The first sidewall 10a, the second sidewall 10b, and the top of the arc-shaped transition section 101a are connected by a connecting wall 10c, thereby forming a streamlined airflow guiding surface from bottom to top, realizing the structure of the support cover 12, and forming a streamlined closed end 122 at the end of the support cover 12 away from the mounting part 11a. Through the above optimized design, the support cover 12 of the wiper bracket 1a can have a better airflow guiding effect, effectively reducing the wind resistance encountered by the wiper bracket 1a when wiping, while also giving the support cover 12 a good industrial design aesthetic.

[0025] like Figure 5 , Figure 7The first sidewall 10a and the second sidewall 10b respectively form U-shaped positioning grooves 14a with opposite openings in the area located in the support cover 12. The two U-shaped positioning grooves 14a are constructed as guide limiting members. The inner wall of the U-shaped positioning groove 14a forms a contact surface for applying pushing force to the elastic support member 5a. The distance L1 between the two guide limiting members 14a is positively correlated with the length L2 of the elastic support member 5a. That is, the longer the length L2 of the elastic support member 5a, the larger the distance L1 between the two guide limiting members 14a. More preferably, the distance between the two guide limiting members 14a is... The distance L1 is between 1 / 3 and 2 / 3 of the total length L2 of the elastic support member 5a. Depending on the size of the wiper blade, the distance L1 between the two guide limiting members 14a can be set to 150mm ≤ L1 ≤ 300mm, and the total length L2 of the elastic support member 5a can be set to 300mm ≤ L2 ≤ 800mm. More preferably, under the premise of manufacturing wipers of the same size, the distance L1 between the two guide limiting members 14a is optimized to 175mm ≤ L1 ≤ 250mm, and the total length L2 of the elastic support member 5a is optimized to 350mm ≤ L2 ≤ 700mm. Figure 8 Furthermore, when the wiper bracket 1a is horizontally positioned, the guide limiting member 14a of the wiper bracket 1a is used to ensure that the contact surface A of the wiper bracket 1a that applies downward pushing force to the elastic support member 5a is at a height less than the bottom end face B of the wiper bracket 1a located in the mounting part 11a. That is, there is a height difference between the bottom end face B of the mounting part 11a and the contact surface A of the U-shaped positioning groove 14a. This height difference ensures that when the two elastic support members 5a are assembled in place, the wiper bracket 1a uses the contact surface A of the U-shaped positioning groove 14a to generate a downward pressing force on the elastic support member 5a, rather than using the bottom end face B of the mounting part 11a to apply a downward pressing force to the elastic support member 5a.

[0026] In a further optimized design, a reinforcing block 142a is horizontally placed at the top of the two U-shaped positioning grooves 14a, and a height difference H3 is formed between the bottom end face of the reinforcing block 142a and the inner top wall 143a of the U-shaped positioning groove 14a. By adding the reinforcing block 142a, the structural strength of the set of guiding and limiting components 14a can be further improved, and the height difference H3 also provides sufficient clearance so that the top of the wiper blade 6 will not interfere with the reinforcing block 142a when it is inserted. In a further optimized design, the open end of the U-shaped positioning groove 14a facing the windshield is provided with a guide slope 141a to facilitate the insertion of the elastic support component 5a into the U-shaped positioning groove 14a. The guide slope 141a facilitates the direct insertion of the elastic support component 5a into the U-shaped positioning groove 14a.

[0027] Meanwhile, since the overall length of the wiper bracket 1a disclosed in this invention far exceeds that of the wiper connector of a traditional frameless wiper, especially when the mounting part of the wiper bracket 1a adopts the first or second embodiment, there is a recessed space in both the mounting parts 11a and 11b of the wiper bracket 1a. This can easily lead to insufficient overall strength of the wiper bracket 1a. Conventionally, the structural strength problem can be partially solved by increasing the thickness of the plastic. However, this invention solves the strength problem of the wiper bracket 1a by using a metal reinforcing member 8, such as... Figure 7 As shown, the wiper bracket 1a is further provided with a metal reinforcing member 8 at least at the position of the mounting part 11a. The metal reinforcing member 8 can be constructed as an integral injection molded part encapsulated in the wiper bracket 11a, or it can be separately designed and fixed to the bottom end face of the housing 13. A more optimized design is that the two ends of the metal reinforcing member 8 extend to the positions of the two limiting guide members 14a or adjacent to the positions of the two limiting guide members 14a. The metal reinforcing member 8 has sufficient length to further increase the strength of the wiper bracket 1a and ensure that the two limiting guide members 14a are not prone to plastic deformation. At the same time, it is also beneficial to better transmit the pushing force of the wiper arm applied to the mounting parts 11a and 11b of the wiper bracket 1a to the two limiting guide members 14a through the metal reinforcing member 8.

[0028] In this embodiment, the longitudinal limiting part 15a of the wiper bracket 1a is a limiting block 15a. This limiting block 15a is designed to engage with the limiting groove 51a of the elastic support member 5a. The limiting block 15a is unilaterally embedded in the U-shaped positioning groove 14a (e.g., ...). Figure 7 (as shown), or in the area protruding inward from the two side walls 10a and located adjacent to the U-shaped positioning groove 14a (such as... Figure 9 As shown), both are located directly in the U-shaped positioning groove 14a or its adjacent area. Since the former is built into the U-shaped positioning groove 14a, it is inconvenient to observe whether the elastic support component 5a and the wiper bracket 1a are longitudinally engaged. The latter is easier to observe. Furthermore, this design allows for better observation when the mounting portion 11c of the wiper bracket 1a adopts the scheme of the third embodiment (…). Figure 18 For more details, please refer to [link / reference]. Figure 10 The wiper arm 201 is pivotally connected to the connecting rod 115. During the assembly of the wiper arm 200 with the wiper, the wiper arm 200 easily abuts against the elastic support component 5a. Traditional frameless wipers usually place the limiting block 15a near the mounting part 11c, and the limiting groove 51a of the elastic support component 5a is easy to detach from the limiting block 15a. However, the present invention places the limiting block 15a in a region far away from the mounting part 11c. Even if the elastic support component 5a is elastically deformed due to being abutted by the wiper arm 200, it is not easy to detach from the limiting block 15a.

[0029] like Figure 3 The following is a more detailed description of the frameless wiper 100a disclosed in this invention: A wiper blade 6 has two slots 61 for laterally accommodating elastic support members 5a and a scraper blade 62, respectively, from top to bottom; two elastic support members 5a, each of which includes at least one laterally opening limiting groove 51a, the limiting groove 51a being positioned opposite to a longitudinal limiting portion 15a, and limiting grooves 52 being respectively opened at both ends of the elastic support member 5a; two connecting members 7a are respectively located at both ends of the two elastic support members 5a, the inner cavity of the connecting member 7 having an accommodating cavity for accommodating the elastic support member 5a, and at least at a position relative to the limiting groove 52 having a locking point (not shown), which is used for... The two ends of the two elastic support components 5a are locked together; the elastic support components 5a are partially housed in the slots 61 of the wiper blade 6, so that the limiting grooves 51a of the elastic support components 5a are not covered by the slots 61 of the wiper blade 6. The two elastic support components 5a are respectively nested and locked in the two slots 61 of the wiper blade 6 by the two connecting pieces 7a, so as to form the first wiper blade assembly I; the two elastic support components 5a of the first wiper blade assembly I are sleeved on the guide limiting member 14a of the wiper bracket 1a, and the limiting grooves 51a of the elastic support components 5a and the longitudinal limiting part 15a of the wiper bracket 1a are mutually engaged, restricting the relative displacement of the first wiper blade assembly I and the wiper bracket 1a along the length direction.

[0030] A more optimized design, such as Figure 12 The elastic support component 5a is a longitudinally extending arc-shaped sheet with curvature. The elastic support component 5a forms a first arc-shaped component III and a second arc-shaped component IV from the center point O to both ends. The first arc-shaped component III has a first bending base point G1, and the second arc-shaped component IV has a second bending base point G2. The first arc-shaped component III has the smallest radius of curvature at the first bending base point G1, and the second arc-shaped component IV has the smallest radius of curvature at the second bending base point G2. When the elastic support component 5a is horizontally stationary without applied force, the height of the line connecting the first bending base point G1 and the second bending base point G2 is less than the height of the center point O; and the positions of the first bending base point G1 and the second bending base point G2 are exactly opposite to the positions of the guide limiting component 14a.

[0031] In a further optimized design, the first arc-shaped component III and the second arc-shaped component IV are symmetrically distributed along the center point O of the elastic support component 5a. The radius of curvature of the two ends of the first arc-shaped component III or the area covering the two ends and their adjacent regions is equal to or approximately close to ∞. The interval L3 between the first bending base point G1 and the second bending base point G2 is 150mm≤L3≤300mm, and the total length L2 of the elastic support component 5a can be set to 300mm≤L2≤800mm. More preferably, under the premise of manufacturing wipers of the same size, the interval L3 between the first bending base point G1 and the second bending base point G2 is 175mm≤L3≤250mm, and the total length L2 of the elastic support component 5a is optimized to 350mm≤L2≤700mm. It should be noted that the lengths of L3 and L2 are measured by measuring the length of the elastic support component 5a in a flattened state. The flattened state of the elastic support component 5a means that the arched part of the elastic support component 5a is pressed down by external force to form a flat plate that matches the horizontal reference plane.

[0032] The elastic support component 5a designed as described above differs from the conventional elastic support component 5' design, such as... Figure 11 As shown, the conventional elastic support component 5' is pre-formed at the factory as an arc-shaped component with a certain gradually changing radius of curvature. The radius of curvature of this arc-shaped component gradually increases from the center O' to both sides, that is, the radius of curvature at the center of the elastic support component 5' is the smallest, and the radius of curvature at both ends of the elastic support component 5' is the largest. The wiper joint is arranged at the center of the elastic support component 5'. The wiper arm is connected to the wiper through the wiper joint. The pre-tightening force formed by the wiper arm pressing down on the elastic support component 5' drives the wiper blade to adhere to the windshield. The downward pressure of the wiper arm on the elastic support component 5' gradually decreases from the center O' of the elastic support component 5' to both sides. Therefore, it is easy to cause the wiper blade at the beginning and end of the wiper to not adhere tightly to the windshield surface, resulting in the problem of unclean wiping. This invention creatively divides the minimum radius of curvature of the elastic support component 5a into two parts from the original center point, shifting them to both sides. This gives the elastic support component 5a two bending base points G1 and G2, and the positions of these two bending base points G1 and G2 coincide with the positions of the guide and limiting component 14a. That is, the pushing force applied by the wiper arm to the wiper bracket 1a is directly transmitted to the elastic support component 5a via the guide and limiting component 14a, and the force point is exactly located on the two bending base points G1 and G2 of the elastic support component 5a. This allows the elastic support component 5a to transmit the force to both sides with the first bending base point G1 and the second bending base point G2 as the center points of force, so that the wiper blade 6 can bear the pushing force applied by the elastic support component 5a more evenly. Ultimately, this allows the two ends of the wiper blade 6 to better adhere to the surface of the windshield, improving the cleanliness of the wiper blade 6.

[0033] A more optimized design is achieved when the length of the wiper bracket 1a is less than the length of the elastic support member 5a, and the elastic support members 5a and 5b are made of metal. At least the exposed portion of the elastic support member 5a extending beyond the wiper bracket 1a has an anti-rust coating, or the elastic support members 5a and 5b themselves are made of anti-rust material, or a waterproof decorative sleeve 4 covers the exposed portion of the elastic support members 5a and 5b extending beyond the wiper bracket 1a and 1b. Through the above treatments, the overall service life of the wiper product can be increased.

[0034] This invention also discloses another series of frameless wiper blades 100b. The most significant difference between this series of frameless wiper blades 100b and the frameless wiper blades 100a disclosed above is the addition of a bearing clip 9 between the wiper blade rubber strip 6 and the elastic support component 5b. Simultaneously, the structures of the flow guiding and limiting component 14b and the longitudinal limiting component 15b of the wiper bracket 1b are adaptively adjusted. The same applies to the other three embodiments involving the mounting parts 11a, 11b, and 11c. More detailed descriptions are as follows: like Figure 13-16 As shown, a frameless wiper 100b includes: an elastic support member 5b, the upper surface of which is provided with a locking portion 51b, the locking portion 51b being exactly opposite to the positioning block 140b of the wiper bracket 1b. The locking portion 51b can be implemented by forming a positioning spring 50b on the elastic support member 5b that cannot be offset from it. The positioning spring 50b is in the shape of a thin sheet, and the locking portion 51b extends upward therefrom. More embodiments using the positioning spring 50b to form the locking portion 51b can be found in CN108583517A, and will not be repeated here.

[0035] A support plate 9 is long and narrow, and has a first receiving groove 91 and a second receiving groove 92 arranged from top to bottom. The first receiving groove 91 is used to insert the elastic support member 5b, and at least one opening is provided at the top of the first receiving groove 91 for the locking part 51b to be exposed. In this embodiment, a C-shaped groove with a top opening is directly used as the first receiving groove 91. The second receiving groove 92 forms a slit for the wiper blade 6 to be inserted. At the same time, a side wing 93 extending to both sides along its width direction is provided at the junction of the first receiving groove 91 and the second receiving groove 92. The two end clips 7b are located at both ends of the bearing clamp 9. The elastic support component 5b and the wiper blade 6 are locked to both sides of the bearing clamp 9 by the end clips 7b. The specific structure can be found in CN108657127A. There is no similar one here, so the specific description of the internal structure of the end clip 7b is omitted.

[0036] The elastic support component 5b and the wiper blade 6 are respectively inserted into the first receiving groove 91 and the second receiving groove 92 of the bearing clamp 9, and are locked by the buckles 7b at both ends to form the second wiper blade assembly II. The receiving cavity 13 of the wiper bracket 1b includes two sidewalls 10a and 10b spaced apart and substantially parallel along its width direction. Each sidewall 10a and 10b forms an inwardly extending groove 141b for the bearing clamp 9 to pass through. A horizontally placed connecting piece 142b is formed at the top of the groove 141b. The groove 141b and the connecting piece 142b are configured as guide and limiting members 14b. At least one of the guide and limiting members 14b has a positioning block 140b protruding outward from the side of the connecting piece 142b facing the elastic support member 5b. Two pressure strips 143b are provided on both sides of the positioning block 140b along its width direction. The pressure strips 143b are used to abut against the positioning spring piece 50b. The top of the positioning spring 50b allows it to be more stably positioned on the elastic support member 5b. Two guide beams 144b are formed at both ends of the positioning block 140b along the length direction. A guide ramp 1441b is formed at the end of the guide beam 144b away from the positioning block 140b. The two end faces of the positioning block 140b along the length direction are constructed as longitudinal limiting parts 15b. It should be noted that the setting of the guide limiting member 14b and the longitudinal limiting block 15b can also refer to the technical solution disclosed in the previous case CN108583517A. The obvious difference from the previous case is that the above positions are not set in the opposite position of the mounting part (wiper connecting device), but are set in a position away from the mounting part. The two wings of the bearing plate 9 of the second wiper blade assembly II are inserted into the slide groove 141b, and the locking part 51b on the elastic support member 5b is locked with the positioning block 140b on the wiper bracket 1b to restrict the relative displacement of the second wiper blade assembly II and the wiper bracket 1b along the length direction, thereby realizing the assembly of the frameless wiper 100b.

[0037] 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 invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An integrated wiper bracket, wherein the wiper bracket (1a, 1b) is at least used to support elastic support components (5a, 5b), characterized in that: The wiper bracket (1a, 1b) has a mounting part (11a, 11b, 11c) in the middle, which is used to directly or indirectly receive the wiper arm (3). Support covers (12) extend outward from both ends of the mounting portion (11a, 11b, 11c) along their length direction, and the outer surface of the support cover (12) forms a guide surface that helps to reduce the wind resistance generated during the wiper wiping process. The two support covers (12) and the mounting parts (11a, 11b, 11c) are integrally injection molded, and the total length of the wiper bracket (1a, 1b) is greater than 1 / 2 of the total length of the elastic support parts (5a, 5b); A receiving cavity (13) for receiving elastic support members (5a, 5b) is formed at the bottom of the support cover (12) and the mounting portion (11a, 11b, 11c). The receiving cavity (13) includes two guide limiting members (14a, 14b) spaced apart along the length direction and at least one longitudinal limiting portion (15a, 15b). Each of the guide limiting members (14a, 14b) is located in the area of ​​the support cover (12) and has a contact surface for applying a pushing force to the elastic support members (5a, 5b). Furthermore, it can directly or indirectly guide the elastic support components (5a, 5b) along the length direction of the wiper bracket (1a, 1b) and limit the relative displacement of the elastic support components (5a, 5b) and the wiper bracket (1a, 1b) in the width and height directions; the longitudinal limiting part (15a, 15b) is used to limit the mutual limiting cooperation with the corresponding snap-fit ​​part (51a, 51b) of the elastic support component (5a, 5b), and it is used to limit the longitudinal displacement between the elastic support component (5a, 5b) and the wiper bracket (1a, 1b); The distance L1 between the two guide limiting members (14a, 14b) is between 1 / 3 and 2 / 3 of the total length L2 of the elastic support members (5a, 5b). This distance increases the span between the two guide limiting members (14a, 14b), ensuring that when the elastic support members (5a, 5b) are installed on the two guide limiting members (14a, 14b), the elastic support members (5a, 5b) can better extend and bear force, driving the two ends of the wiper blade to better fit the windshield surface.

2. The wiper blade holder of claim 1, wherein The wiper bracket has streamlined closed ends (122) at both ends, so that the support cover of the wiper bracket forms a guide surface from the adjacent mounting area to the streamlined closed end.

3. The wiper bracket as described in claim 1, characterized in that: The distance L1 between the two guide limiting components (14a, 14b) is 150mm≤L1≤300mm. The total length L2 of the elastic support component (5a, 5b) is positively correlated with the length of the distance L1 between the two guide limiting components (14a, 14b), and its range is 300mm≤L2≤800mm.

4. The wiper bracket as described in claim 1, characterized in that: The inner cavity of the support cover (12) of the wiper bracket (1a, 1b) is hollow and is provided with several grid-like reinforcing ribs (121).

5. The wiper bracket as described in claim 1, characterized in that: When the wiper brackets (1a, 1b) are horizontally positioned, the guide limiting members (14a, 14b) of the wiper brackets (1a, 1b) are used to ensure that the contact surface (A) of the wiper brackets (1a, 1b) that applies downward pushing pressure to the elastic support members (5a, 5b) is at a height from the ground less than the bottom end face (B) of the wiper brackets (1a, 1b) located in the mounting part (11a, 11b, 11c).

6. The wiper bracket as described in claim 1, characterized in that: The mounting part (11a) of the wiper bracket (1a, 1b) is a connecting seat (11a). The connecting seat (11a) has a recessed base (111) and two slots (112). The base (111) has at least one supporting and limiting part (1111). The two slots (112) are located at one end of the two supporting covers (12) facing the base (111). The connecting seat (11a) is used to couple the connecting unit (2).

7. The wiper bracket as described in claim 1, characterized in that: The mounting part (11b) of the wiper bracket (1a, 1b) includes a sunken support plane (113) and a connector (2'). The connector (2') is integrally formed and protrudes from the support plane (113). The connector (2') can be made into a mating part that is directly hinged to the wiper arm (3), or into a mating part that is connected to the wiper connector.

8. The wiper bracket as described in claim 6 or 7, characterized in that: The wiper bracket (1a, 1b) is provided with a metal reinforcement member (8) at least at the position of the mounting part (11a, 11b). The metal reinforcement member (8) can be constructed as an integral injection molded and encapsulated in the wiper bracket, or separately designed and fixed to the bottom end face of the receiving cavity (13).

9. The wiper bracket as described in claim 8, characterized in that: The two ends of the metal reinforcing member (8) extend to the positions of the two limiting guide members (14a, 14b) or adjacent to the positions of the two limiting guide members (14a, 14b).

10. The wiper bracket as described in claim 1, characterized in that: The mounting portion (11c) of the wiper bracket (1a, 1b) forms at least two side wings (110) arranged along its width direction, and an insertion channel for inserting the wiper arm is formed between the two side wings (110). At least one connecting rod (115) is placed horizontally between the two side wings (110) for connecting the wiper connector.

11. The wiper bracket as described in claim 1, characterized in that: The wiper bracket (1a, 1b) includes a first sidewall (10a) and a second sidewall (10b) that are spaced apart and substantially parallel along their width direction. The two ends of the first sidewall (10a) are connected to the ends of the second sidewall (10b) by an arc-shaped transition section (101a). The tops of the first sidewall (10a), the second sidewall (10b), and the arc-shaped transition section (101a) are connected by a connecting wall (10c), thereby making the support cover of the wiper bracket form a guide surface from the adjacent mounting area to the end.

12. The wiper bracket as described in claim 11, characterized in that: The first sidewall (10a) is located on the windward side, and the height of the first sidewall (10a) is less than the height of the second sidewall (10b), thereby making the support cover form a streamlined guide surface from bottom to top.

13. The wiper bracket as described in any one of claims 1-12, characterized in that: The receiving cavity (13) of the wiper bracket (1a) includes two side walls (10a, 10b) spaced apart and substantially parallel along its width direction. The two side walls (10a, 10b) respectively form U-shaped positioning grooves (14a) with openings facing each other. The two U-shaped positioning grooves (14a) are constructed as guiding and limiting members. The inner wall of the U-shaped positioning groove (14a) forms a contact surface for applying pushing force to the elastic support member (5a).

14. The wiper bracket as described in claim 13, characterized in that: A reinforcing block (142a) is horizontally placed on the top of the two U-shaped positioning grooves (14a), and a height difference H3 is formed between the bottom end face of the reinforcing block (142a) and the inner top wall (143a) of the U-shaped positioning groove (14a).

15. The wiper bracket as described in claim 13, characterized in that: The longitudinal limiting part (15a) is a limiting block (15a), which is internally provided in the U-shaped positioning groove (14a); or it is formed by protruding inward on the two side walls (10a, 10b) in the area adjacent to the U-shaped positioning groove (14a).

16. The wiper bracket as described in any one of claims 1-12, characterized in that: The receiving cavity (13) of the wiper bracket (1b) includes two sidewalls (10a, 10b) spaced apart and substantially parallel along its width direction. Each sidewall (10a, 10b) forms an inward groove (141b) for the bearing clamp (9) to pass through. A horizontal connecting piece (142b) is formed at the top of the groove (141b). The groove (141b) and the connecting piece (142b) are constructed as guide limiting members (14b). At the same time, at least one of the guide limiting members (14b) has a positioning block (140b) protruding outward on the side end of the connecting piece (142b) facing the elastic support member (5b). The two end faces of the positioning block (140b) along the length direction are constructed as longitudinal limiting parts (15b).

17. A one-piece frameless wiper, comprising: A wiper blade (6) has two slots (61) for laterally accommodating an elastic support member (5a) and a scraper blade (62) from top to bottom. Two elastic support components (5a), each of which is a longitudinally extending arc-shaped sheet with curvature. Each elastic support component (5a) forms a first arc-shaped member (III) and a second arc-shaped member (IV) from its center point O towards both ends. The first arc-shaped member (III) has a first bending base point (G1), and the second arc-shaped member (IV) has a second bending base point (G2). The first arc-shaped member (III) has the smallest radius of curvature at the first bending base point (G1), and the second arc-shaped member (IV) has the smallest radius of curvature at the first bending base point (G1). The second bending base point (G2) has the smallest radius of curvature. When the elastic support member (5a) is in a naturally extended state, the height of the line connecting the first bending base point (G1) and the second bending base point (G2) is less than the height of the center point O. The positions of the first bending base point (G1) and the second bending base point (G2) are exactly opposite to the position of the guide limiting member (14a). Each elastic support member (5a) includes at least one limiting groove (51a) opened in the lateral direction, and the limiting groove (51a) is opposite to the longitudinal limiting part (15a). Two connectors (7a) are located at both ends of the two elastic support members (5a) and are used to lock the two ends of the two elastic support members (5a). The elastic support member (5a) is partially housed in the slot (61) of the wiper blade (6), so that the limiting groove (51a) of the elastic support member (5a) is not covered by the slot (61) of the wiper blade (6). The two elastic support members (5a) are respectively nested and locked in the two first slots (61) of the wiper blade (6) by the two connectors (7a), so as to form the first wiper blade assembly (I). The feature is that it further includes a wiper bracket (1a) as described in any one of claims 1-15, wherein the two elastic support members (5a) of the first wiper blade assembly (I) are fitted onto the guide limiting member (14a) of the wiper bracket (1a), and the limiting groove (51a) of the elastic support member (5a) and the longitudinal limiting part (15a) of the wiper bracket (1a) are mutually engaged to limit the relative displacement of the first wiper blade assembly (I) and the wiper bracket (1a) along the length direction.

18. A one-piece frameless wiper, comprising: An elastic support member (5b) is a longitudinally extending, curved, arc-shaped sheet. The elastic support member (5b) forms a first arc-shaped component (III) and a second arc-shaped component (IV) at its two ends from a center point O. The first arc-shaped component (III) has a first bending base point (G1), and the second arc-shaped component (IV) has a second bending base point (G2). The first arc-shaped component (III) has the smallest radius of curvature at the first bending base point (G1), and the second arc-shaped component (IV) has the smallest radius of curvature at the second bending base point (G2). (G2) has the smallest radius of curvature. When the elastic support component (5b) is in a naturally extended state, the height of the line connecting the first bending base point (G1) and the second bending base point (G2) is less than the height of the center point O. The positions of the first bending base point (G1) and the second bending base point (G2) are exactly opposite to the position of the guide limiting component (14b). A locking part (51b) is provided on the upper surface of the elastic support component (5b), and the locking part (51b) is exactly opposite to the position of the positioning block (140b) of the wiper bracket (1b). A support plate (9) is long and narrow, and has a first receiving groove (91) and a second receiving groove (92) arranged from top to bottom. The first receiving groove (91) is used to insert the elastic support member (5b), and at least one opening is provided at the top of the first receiving groove (91) for the locking part (51b) to be exposed. The second receiving groove (92) forms a slit for the wiper blade (6) to be inserted. At the same time, a side wing (93) extending to both sides along its width direction is provided at the junction of the first receiving groove (91) and the second receiving groove (92). The two end buckles (7b) are located at both ends of the bearing clamp (9) and the elastic support component (5b) and the wiper blade (6) are locked to both sides of the bearing clamp (9) by the end buckles (7b); A wiper blade (6) and the elastic support component (5b) are respectively inserted into the second receiving groove (92) and the first receiving groove (91) of the bearing clamp (9), and are locked by the buckles (7b) at both ends to form a second wiper blade assembly (II). The feature is that it further includes the wiper bracket (1b) as described in claim 16, wherein the two wings of the bearing plate (9) of the second wiper blade assembly (II) are inserted into the slide groove (141b), and the locking part (51b) on the elastic support member (5b) and the positioning block (140b) on the wiper bracket (1b) are locked together to restrict the relative displacement of the second wiper blade assembly (II) and the wiper bracket (1b) along the length direction.

19. The integrated frameless wiper as described in claim 18, characterized in that: A positioning spring (50b) that cannot be offset from the elastic support member (5b) is formed on the elastic support member (5b). The positioning spring (50b) is thin and extends upward to a locking portion (51b).

20. The frameless wiper according to any one of claims 17 to 19, characterized in that: The elastic support components (5a, 5b) are made of metal, and at least the exposed portions of the elastic support components (5a, 5b) extending beyond the wiper brackets (1a, 1b) have an anti-rust coating; or the elastic support components (5a, 5b) themselves are made of anti-rust material; or the exposed portions of the elastic support components (5a, 5b) extending beyond the wiper brackets (1a, 1b) are covered with a waterproof decorative sleeve (4).

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