CN116588037A - Elastic supporting component and boneless windshield wiper - Google Patents

Abstract

The application discloses an elastic supporting part, which takes a lateral central axis Y as a boundary, and forms a first arc-shaped component and a second arc-shaped component towards two ends respectively, wherein the first arc-shaped component is provided with a first bending base point, the second arc-shaped component is provided with a second bending base point, the curvature radius of the first arc-shaped component at the first bending base point is minimum, and the curvature radius of the second arc-shaped component at the second bending base point is minimum; the application also discloses a boneless wiper using the elastic supporting component, which comprises a wiper joint support, the elastic supporting component, a wiper rubber strip and two jackets, wherein the inner cavity of the wiper joint support is provided with two guide limiting members and at least one longitudinal limiting part, the distance L1 between the two guide limiting members is between 1/3 and 2/3 of the total length L2 of the elastic supporting component, the two jackets are arranged at two ends of the wiper joint support and are used for wrapping the outwards extending part of the elastic supporting component from the wiper joint support, and the outer side surfaces of the jackets form a diversion surface which is favorable for reducing wind resistance generated in the wiper scraping process.

Description

Elastic supporting component and boneless windshield wiper

Technical Field

The application relates to the field of windshield wiper steam fittings for wiping windshields, in particular to an elastic supporting component and a boneless windshield wiper with the elastic supporting component.

Background

The conventional boneless wiper at least comprises an elastic supporting part, wherein the elastic supporting part is a prefabricated arc-shaped sheet-shaped body, the curvature radius of the arc-shaped sheet-shaped body is gradually increased from the middle part to the two ends, namely the elastic supporting part can be in a natural stretching state under the action of no external force, the arc of the middle part is the largest, and the two ends are gradually straightened; in general, a wiper connecting device for hinging a wiper arm is loaded at the middle part of the elastic supporting component, and the wiper arm applies a pushing force to the elastic supporting component through the wiper connecting device, so that the elastic supporting component can act on the wiper rubber strip in a freely elastic deformation manner, the wiper blade of the wiper rubber strip can be ensured to be always contacted with the surface of the windshield glass, and the wiping of the windshield glass is realized. However, the length of the conventional wiper connecting device is shorter, the length of the wiper connecting device is generally less than 1/3 of the total length of the wiper rubber strip, and the supporting points of the wiper connecting device on the elastic supporting component are often concentrated in the middle of the elastic supporting component, so that the pushing force of the wiper rubber strip positioned at two ends of the elastic supporting component is minimum, and as the radian of the edges of two sides of the windshield glass is gradually increased, the two ends of the wiper rubber strip cannot be tightly attached to the surface of the windshield glass, and the wiping effect of the windshield wiper is affected.

Disclosure of Invention

A first object of the present application is to provide an elastic support member having a more optimal radius of curvature design, by means of which the wiper strip can be driven to a tighter fit against the windscreen surface.

The second object of the present application is to provide a boneless wiper with high wiping cleanliness.

A third object of the present application is to provide a boneless wiper with a more stable connection structure.

In order to achieve the first object of the present application, an elastic supporting component is disclosed, which has an arc-shaped sheet-shaped body extending along a length direction and having a curvature, the elastic supporting component is used for pre-bending a wiper strip, when the elastic supporting component is in a natural stretching state and is kept standing along a horizontal direction, the elastic supporting component is divided by a lateral central axis Y, a first arc-shaped member and a second arc-shaped member are respectively formed towards two ends, the first arc-shaped member has a first bending base point, the second arc-shaped member has a second bending base point, the curvature radius of the first arc-shaped member at the first bending base point is minimum, the curvature radius of the second arc-shaped member at the second bending base point is minimum, and the ground clearance height of a connecting line of the first bending base point and the second bending base point is smaller than the ground clearance height of a central point O.

The definition about the lateral central axis Y is a median line bisecting the elastic support member in the longitudinal direction; the definition of the bending base point can be realized by measuring arc length sections with a certain length before and after each point on the longitudinal central axis of the elastic supporting component or a longitudinal line parallel to the longitudinal central axis, for example, the arc length sections are taken as 20mm, namely, the curvature radius corresponding to each 10mm arc length section before and after each point is measured, namely, the curvature radius of the point is measured, the point with the smallest curvature radius is selected as the bending base point (the point with the 10mm arc length at the two ends of the elastic supporting component is ignored), the length of the selected arc length section is related to the total length of the elastic supporting component, and the longer the length is, the larger the span selected by the arc length section is.

Further, when the elastic supporting member is pressed against the horizontal surface, the length M1 from the first bending base point to the second bending base point is between 1/3 and 2/3 of the total length L2 of the elastic supporting member.

To achieve the second object of the present application, the present application discloses a boneless wiper comprising:

the windshield wiper connector bracket is provided with a mounting part for receiving the wiper arm at the middle part, at least two ends of the mounting part extend outwards along the length direction of the mounting part to form a cover member with a downward opening, and the inner cavity wall of the cover member comprises two guiding and limiting members and at least one longitudinal limiting part;

at least one elastic supporting component is directly or indirectly assembled in the two guide limiting members through the middle connecting piece, and is further provided with a clamping part for realizing longitudinal limiting fit with the longitudinal limiting part;

the two guiding and limiting members are respectively opposite to the first bending base point and the second bending base point, so that the wiper joint bracket transmits the pushing force applied on the wiper arm to the elastic supporting part through the guiding and limiting members;

the windshield wiper rubber strip can be directly connected with the elastic supporting component or connected with the elastic supporting component through the middle connecting piece and used for bearing the pushing force transmitted by the elastic supporting component;

the two jackets are arranged at the two ends of the windshield wiper joint support and are used for wrapping the outwards extending parts of the elastic supporting parts from the windshield wiper joint support, and meanwhile, the jackets and the outer side surface of the windshield wiper joint support form a diversion surface which is favorable for reducing wind resistance generated in the windshield wiper scraping process.

By adopting the structure, the windshield wiper disclosed by the application has the following innovation points that the existing windshield wiper has:

the windshield wiper joint support (hard material) is constructed to be provided with a cover body component which is opened downwards, the whole length of the cover body component is at least greater than 1/3 of the whole length of the elastic supporting component, and a diversion surface which is beneficial to reducing wind resistance is formed on the outer surface of the cover body component;

two guiding and limiting members with a large enough span are arranged in the inner cavity of the wiper joint bracket, and the span length L1 of the guiding and limiting members is at least more than or equal to 1/3 of the length L2 of the elastic supporting part;

the radian of the minimum curvature radius prefabricated by the elastic supporting component is adjusted to be matched with the position of the stress part of the guiding and limiting component, so that the pushing force of the elastic supporting component applied to the first bending base point and the second bending base point by the guiding and limiting component is further increased, the pushing force is respectively transmitted to the two ends of the first arc-shaped component and the second arc-shaped component, and the windshield wiper adhesive tape is further enabled to be attached to the windshield glass better.

By artificially increasing the length of the wiper joint support, the inner cavity of the wiper joint support is provided with a long enough space for arranging two long-span guide limiting members, and the two long-span guide limiting members respectively apply pushing force to the positions of the first bending base point and the second bending base point of the elastic supporting component, the wiper rubber strip coupled to the elastic supporting component can be ensured to be better attached to the outer surface of the windshield, and particularly the regions positioned at the head end and the tail end of the elastic supporting component.

In order to achieve the third object of the present application, the longitudinal limiting portion is disposed at a position far away from the mounting portion, so that the assembled wiper can be prevented to the greatest extent, and the clamping portion of the elastic supporting member and the longitudinal limiting portion are not necessarily separated from each other, thereby increasing the stability of the wiper connection.

Drawings

FIG. 1 is an exploded perspective view of embodiment 1 of the boneless wiper of the present application;

fig. 2 is a perspective view of a wiper joint bracket (first type) of the present application;

FIG. 3-1 is a side schematic view of the resilient support of the present application in a naturally stretched state;

FIG. 3-2 is a schematic side view of the resilient support of the present application in compression against a horizontal plane;

FIG. 4 is a schematic view of the assembly of the boneless wiper of the present application;

fig. 5 is a bottom view of the boneless wiper (first type) of the present application;

FIG. 6 is a schematic cross-sectional view taken along line A-A of FIG. 5;

FIG. 7 is a schematic cross-sectional view of FIG. 5 taken along the direction B-B;

FIG. 8 is a perspective view of the boneless wiper of the present application using a second mount;

FIG. 9 is a perspective view of a boneless wiper according to the present application using a third mount;

fig. 10 is an exploded perspective view of the boneless wiper (second type) of the present application;

fig. 11 is a perspective view of a wiper joint holder (second type) of the present application;

FIG. 12 is a schematic cross-sectional view of the boneless wiper (second type) removal sheath of the present application taken along a central axis;

fig. 13 is a schematic cross-sectional view of the boneless wiper (second type) of the present application at the longitudinal limit.

Description of the embodiments

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.

First type boneless wiper: the elastic supporting parts 2a are directly penetrated into the two guide and limit members 12a of the wiper joint bracket 1a, which will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the present application discloses a boneless wiper, comprising a wiper joint bracket 1a, an elastic supporting member 2a, a wiper strip 3 and two sheaths 4a; the wiper joint support 1a is a cover member that is integrally elongated and has a downward opening, the cover member is generally made of hard plastic, the whole outer surface of the cover member can be provided with a guide surface 14 that can effectively reduce wind resistance, a plurality of reinforcing ribs 15 can be additionally arranged in the inner cavity of the cover member according to the requirement of structural strength, the middle part of the wiper joint support 1a is provided with mounting parts 11a, 11b and 11c for directly or indirectly receiving the wiper arm 200, wherein the first specific embodiment of the mounting part 11a refers to fig. 10 in combination with fig. 1, and comprises a through slot 111a formed in the middle part of the cover member and a connecting rod 112a (refer to fig. 10) transversely arranged in the through slot 111a, the connecting rod 112a is used for pivotally connecting the wiper joint 6a, so that the mounting part 11a indirectly receives the wiper arm 200, the wiper joint 6a can be selected according to different wiper arms, and the wiper joint 6a disclosed in the present drawing is used for adapting to a hook-type wiper arm; referring to fig. 8, in a second embodiment of the mounting portion 11b, the mounting portion 11b includes a sunk supporting plane 111b and a connector device 112b, the connector device 112b is integrally formed and protruding on the supporting plane 111b, the connector device 112b may be made into a mating portion directly hinged with the wiper arm for directly receiving the wiper arm, or made into a mating portion hinged with the wiper joint, and then connected with the wiper arm through the wiper joint, so as to indirectly receive the wiper arm by the mounting portion 11b (the corresponding inventive concept can refer to CN113525300 a); referring to fig. 9, the mounting portion 11c includes a mounting base 111c and a connecting unit 112c, the mounting base 111c has a sunk base 1111c and two clamping grooves 1112c located at two ends of the base 1111c in the length direction, the base 111c is preferably symmetrically provided with a limit protrusion 1113c in the width direction, one end of the connecting unit 112c has an elastic buckle 1121c capable of generating a position offset, the other end has a protruding column 1122c, the connecting unit 112c is fixed on the mounting base 111c by coupling the elastic buckle 1121c and the protruding column 1122c of the connecting unit 112c with the corresponding clamping groove 1112c, the connecting unit 112c has a fitting portion hinged with the wiper arm, or the connecting unit 112c can be hinged with a wiper joint, and the wiper joint realizes the connection with the wiper arm, which is related to the application concept substantially similar to the mounting portion 11c and can refer to CN110843730a or CN106240529a.

As shown in fig. 2, the cover member of the wiper joint bracket 1a has two side walls 10 spaced apart in the width direction and disposed substantially in parallel, and the two side walls 10 are spaced apart in the length direction and provided with two guiding and limiting members 12a and at least one longitudinal limiting portion 13a; the guiding and limiting member 12a is used for directly assembling the elastic supporting component 2a, and its specific structure is formed by two opposite protruding sliding grooves 120a arranged on the inner walls of two side walls 10, in general, each sliding groove 120a includes a top edge 1201a, a side 1202a and a bottom edge 1203a, and an opening for passing through the wiper strip 3 is provided between the bottom edges 1203a of each sliding groove 120a, so long as the space between the top edge 1201a and the bottom edge 1203a is ensured to be enough to accommodate the elastic supporting component 2a, in some embodiments, if the thickness of the side wall 10 is sufficiently thick, the side wall 10 can be directly used as the side edge of the sliding groove 120a without adding additional side edges, but this scheme can lead to the overall thickness of the side wall 10 to be increased, additionally increase the material, resulting in the increase of the production cost, and meanwhile, the outer surface of the integrally thicker injection molded part is easy to generate concave holes or broken surfaces, the yield of the product is reduced, and the design of the product is unfavorable for lightening, therefore, the sliding chute 120a of this embodiment is preferably added with the side edges 1202a to increase the overall strength of the sliding chute 120a based on the existing side wall 10, and more preferably, the top edge 1201a of each sliding chute 120a is connected with each other to form a transverse connection section a, the transverse connection section a is used to increase the compressive strength of the wiper joint support 1a in the lateral direction, meanwhile, in order to effectively control the space between the top edge 1201a and the bottom edge 1203a of the sliding chute 120a, more preferably, the inner side end surface of the top edge 1201a is convexly provided with a positioning rib 1204a, and the positioning rib 1204a is provided with two first straight edges 12041a and second straight edges 12042a perpendicular to each other, the first straight edges 12041a are parallel to the bottom edge 1203a and are staggered, two ends of the second straight edges 12042a are respectively connected with the side edges 1202a and the first straight edges 12041a, the vertical space between the positioning rib 1204a and the bottom edge 1203a is matched with the thickness of the elastic supporting component 2a, by the arrangement, in the production and manufacture, the processing precision of the first straight edge 12041a and the second straight edge 12042a is easier to control than the processing precision of the inner side end surface of the top edge 1201a, and the structural strength of the integral chute 120a can be ensured on the basis of not increasing materials; it should be emphasized that one of the main innovative points of the present application is to artificially enlarge the distance L1 between the two guiding and limiting members 12a, wherein the distance L1 is between 1/3 and 2/3 of the total length L2 of the elastic supporting component 2a, and more preferably, when the total length L2 of the elastic supporting component 2a is set to be 300 mm-L2-800 mm, the distance L1 between the two guiding and limiting members 12a is 150 mm-L1-300 mm; more preferably, when the total length L2 of the elastic supporting member 2a is set in a range of 350mm to 700mm, the distance L1 between the two guide and stopper members 12a is 175mm to 250mm.

As shown in fig. 5, the number of the longitudinal limiting portions 13a is two, the two longitudinal limiting portions are respectively protruded at the inner ends of the two side walls 10 in opposite directions and are adjacent to one of the guiding limiting members 12a, the elastic supporting component 2a is provided with a clamping portion 21a at a position opposite to the longitudinal limiting portion 13a, the clamping portion 21a is a limiting notch (as shown in fig. 1), and the longitudinal limiting portion 13 is clamped with the clamping portion 21a, so as to limit the relative displacement between the elastic supporting component 2a and the wiper joint bracket 1a along the length direction; of course, the longitudinal limiting portion 13a may also be designed as a limiting block (not shown) built in the chute 120a, that is, the longitudinal limiting portion 13a is disposed at a position far from the mounting portion 11a, which has the following advantages: when the installation part 11a of the wiper joint bracket 1a adopts the design of the through groove 111a, the head part of the wiper arm 200 tends to be propped against the middle part of the elastic supporting part 2a to generate downward position offset along the height direction when the wiper arm is installed, or when a consumer takes the wiper, especially for a boneless wiper, the two ends of the wiper are often and involuntarily held by hands to bend the wiper, so that the elasticity of the whole wiper is felt, and the middle part of the elastic supporting part 2a also generates more obvious position offset along the height direction, but because the longitudinal limiting part 13a is arranged at a position far away from the installation part 11a and is adjacent to or directly arranged in the guiding limiting member 12a, the position offset of the elastic supporting part 2a along the height direction is basically negligible in the area of the clamping part 21a, thereby ensuring the safety of the wiper during the wiping process because the assembled elastic supporting part 2a is not easy to separate from the wiper joint bracket 1 a. The clamping parts 21a of the elastic supporting parts 2a are symmetrically arranged (not shown) by taking the lateral central axis Y as a reference, so that the assembly direction of the elastic supporting parts 2a is not required to be considered when a production line worker assembles the elastic supporting parts.

As shown in fig. 3-1 and 3-2, the elastic supporting member 2a disclosed in this embodiment is formed by two elastic sheet bodies 20 extending along the length direction, the elastic sheet bodies 20 are prefabricated to have a certain bending radian, the front end and the rear end of each elastic sheet body 20 are respectively fixed by a connecting block 51, so that a slit 22 for passing through the windshield wiper strip 3 is formed between the two elastic sheet bodies 20, there are various implementations of forming a slit between the two elastic sheet bodies 20 relative to certainly forming a slit between the two elastic sheet bodies 20, for example, the two elastic sheet bodies can be fixed by end buckles arranged at two ends, or the slit can also be formed by directly punching a whole elastic sheet body, in any case, the elastic supporting member 2a with the slit 22 is not an innovation point protected by the present application, but the radian of the elastic supporting member 2a is creatively adjusted, namely, the conventional elastic supporting component is provided with a bending base point only at the middle part, the distribution of the whole curvature radius thereof is gradually increased from the middle part to the two ends, while the elastic supporting component 2a of the application takes a lateral central axis Y as a boundary, a first arc-shaped component I and a second arc-shaped component II are respectively formed to the two ends, the first arc-shaped component I is provided with a first bending base point G1, the second arc-shaped component II is provided with a second bending base point G2, the curvature radius of the first arc-shaped component I at the first bending base point G1 is minimum, the curvature radius of the second arc-shaped component II at the second bending base point G2 is minimum, the first arc-shaped component I and the second arc-shaped component II are symmetrically distributed along the lateral central axis Y of the elastic supporting component 2a, the curvature radius of the first arc-shaped component I gradually increases from the first bending base point G1 to the two ends, when the elastic supporting component 2a is horizontally placed under the condition of no force application, the connecting line height of the first bending base point G1 and the second bending base point G2 is smaller than the height of the central point O, when the elastic supporting component 2a is pressed and mutually attached to the horizontal plane, the length M1 of the first bending base point G1 to the second bending base point G2 is between 1/3 and 2/3 of the total length L2 of the elastic supporting component 2a, when the elastic supporting component 2a is assembled in place, the elastic supporting component 2a generates a certain pre-bending, at the moment, the positions of the first bending base point G1 and the second bending base point G2 are just opposite to the position of the guiding limiting component 12a, therefore, the connecting distance between the first bending base point G1 and the second bending base point G2 is substantially equal to the distance L1 between the two guiding and limiting members 12a, L1 is smaller than M1, and the inner top walls (the first straight edge 12041a of the sliding groove 120 a) of the two guiding and limiting members 12a respectively act on the first bending base point G1 and the second bending base point G2, so that by the above arrangement, the first bending base point G1 and the second bending base point G2 of the elastic supporting component 2a can be ensured to be subjected to the pushing force exerted on the guiding and limiting members 12a, and the stressed force can be more uniformly transferred to the two ends of the first arc-shaped member I and the second arc-shaped member II, so that the two ends of the elastic supporting component 2a can be better attached to the outer surfaces of the windshield glass, and the wiping cleanliness of the windshield wiper is improved.

As shown in fig. 1, 4 to 7, the wiper strip 3 is directly inserted into the slit 22 formed in the middle of the elastic supporting member 2a, and the front end and the rear end of the wiper strip are limited by a strip plug 52a, and for a more specific description of the structure, reference is made to CN109795452a; the two sheaths 4a are respectively arranged at two ends of the wiper joint support 1a, and are preferably made of soft materials, the inner cavity of the sheath 4a is provided with two fixing grooves 41a and 42a, the fixing grooves 41a and 42a are used for wrapping the part of the elastic supporting component 2a extending outwards from the wiper joint support 1a, meanwhile, the outer side surface of the sheath 4a is provided with a guide surface 43 which is beneficial to reducing wind resistance generated in the wiper scraping process, one end of the sheath 4a, opposite to the connecting block 51a, is provided with a necessary accommodating cavity 44a, the accommodating cavity 44a is used for forming nested fit with the connecting block 51a, and the other end of the sheath 44a is inserted into the inner cavity of the wiper joint support 1a, in summary, according to the disclosure of the prior art, one skilled in the art can realize stable connection of the sheath 4a to the elastic supporting component 2a by the necessary technical means, and the structure is not the protection of the application; it should be noted that, the connection structure between the elastic supporting member 2a and the wiper strip 3 and the sheath 4a is not limited to the above structure, and the fixing of the wiper strip 3 and the sheath 4a is achieved by the end buckle disposed at the head and tail ends of the wiper, and the structural design of fig. 1 can be referred to in CN10744347a, which is also a conventional technical means in the art, and the above connection manner can make the overall design of the wiper more compact.

Second type boneless wiper: the elastic support part 2b is connected to the wiper joint support 1b via an intermediate connection 7, as will be described in detail below with reference to the accompanying drawings.

The wiper joint bracket 1b disclosed in the type relates to the position layout of the two guiding limiting members 12b and the longitudinal limiting part 13b, and the innovative design of the prefabricated radian of the elastic supporting part 2b is consistent with the application conception described by the first type boneless wiper, and is not tired, the main difference of the two embodiments is that the second type boneless wiper realizes the connection among the elastic supporting part 2b, the sheath 4b and the wiper rubber strip 3 by adding the intermediate connecting piece 7, meanwhile, the elastic supporting part 2b adopts a complete elastic sheet body, a crack is not required to be opened at the central axis position, and the specific structure can refer to CN108657127A and CN213056999U and is not repeated; however, how to connect and fix the elastic supporting member 2b to the wiper joint support 1b is achieved, and how to connect the intermediate connecting member 7 to the wiper joint support 1b is also achieved, herein, the structure of the clamping portion 21b of the wiper joint support 1b and the elastic supporting member 2b is innovated, referring specifically to fig. 10 to fig. 13, the intermediate connecting member 7 is a bearing clamping plate, the bearing clamping plate 7 is a strip-shaped plastic member, a first accommodating groove 71 and a second accommodating groove 72 are sequentially disposed from top to bottom, the first accommodating groove 71 is used for penetrating the elastic supporting member 2b, at least one open end for exposing the clamping portion 21b of the elastic supporting member 2b is disposed at the top of the first accommodating groove 71, in a specific implementation, a notch extending along the length direction is formed at the top of the first accommodating groove 71, a notch 73 for allowing the adhesive tape 3 of the wiper to penetrate is formed at the bottom of the second accommodating groove 72, and an edge 74 extending along the width direction of the first accommodating groove 71 and the second accommodating groove 72 is disposed at the position of the edge extending outward.

The cover member of the wiper joint bracket 1b has two side walls 10 spaced along the width direction and arranged substantially in parallel, the two side walls 10 respectively form guiding and limiting grooves 120b for the two side wings 74 of the bearing clamping plate 7 to pass through inwards, a transverse connecting piece 121b is formed at the upper part of the two guiding and limiting grooves 120b, the two guiding and limiting grooves 120b and the connecting piece 121b together form the guiding and limiting member 12b, at least one of the connecting pieces 121b of the guiding and limiting member 12b is provided with a positioning part 13b towards the direction of the elastic supporting component 2b, the positioning part 13b is configured as a longitudinal limiting part 13b, the positioning part 13b is formed by a positioning block 131 protruding on the connecting piece 121b, and two side end surfaces of the positioning block 131 along the length direction form a limiting matching surface 132; the clamping portion 21b of the elastic supporting component 2b is formed by a limiting elastic piece 211, the limiting elastic piece 211 is in a sheet shape, a pair of fins 212 with openings facing upwards and shaped like a Chinese character 'ba' are formed by extending upwards, the limiting elastic piece 211 is arranged on the upper surface of the elastic supporting component 2b, and cannot generate relative displacement along the length and width directions with the limiting elastic piece, one specific implementation mode is that two pairs of oppositely arranged notches 23 are respectively arranged on two side edges of the elastic supporting component 2b, two folded edges 2111 which are bent downwards are arranged at positions corresponding to the notches 23, the two folded edges 2111 are correspondingly clamped in the two notches 23 of the elastic supporting component 2b, the height of the folded edges 2111 is smaller than or equal to the thickness of the elastic supporting component 2b, therefore, the horizontal positioning between the limiting elastic piece 211 and the elastic supporting component 2b is achieved, of course, a person skilled in the art can realize the definition of the two in the horizontal directions through welding or different limiting fit modes, when the limiting elastic piece 211 cannot horizontally move and is arranged on the upper surface of the elastic supporting component 2b, the two opposite ends of the two folded edges 2111 are correspondingly clamped in the two notches 23 are respectively matched with the two opposite ends of the corresponding positioning piece 212, and the two ends of the two end pieces of the elastic supporting piece are respectively matched with the two end pieces 132 are respectively along the length of the limiting support frame 132. In a more optimized arrangement, as shown in fig. 11, two sides of the positioning block 131 are respectively provided with a pressing strip 134 along the length direction, which is used for pressing against the upper surface of the limiting elastic piece 211, meanwhile, the middle parts of two limiting matching surfaces 132 of the positioning block 131 are respectively extended outwards to form a guiding block 133 with an inclined plane, the inclined plane of the guiding block 133 is gradually reduced from the length direction far away from the positioning block 131, by the arrangement, when the elastic supporting part 2b with the limiting elastic piece 21b is penetrated into the guiding limiting member 12b of the wiper joint bracket 1b, the guiding block 133 at the inserting end is mutually guided and matched with the fins 212 of the limiting elastic piece 211, so that the fins 212 at the inserting end side of the limiting elastic piece 211 are more convenient to cross the positioning block 131, and finally, the free ends of the two fins 212 are opposite to the two end limiting matching surfaces 132 of the positioning block 131 and are clamped and are in limiting fit. More preferably, the inner end surface of the connecting piece 121b of each guiding and limiting member 12b is provided with a longitudinal limiting part 13b, so that the assembly is convenient without distinguishing the direction of the elastic supporting part 2b, the assembly can be arbitrarily carried out, and the assembly efficiency is improved

The assembly method of the windshield wiper of the embodiment comprises the following steps: the limiting elastic sheet 21b is placed on the elastic supporting component 2b, then is penetrated into the first accommodating groove 71 of the bearing clamping plate 7, the windshield wiper adhesive tape 3 is penetrated into the second accommodating groove 72 of the bearing clamping plate 7, then the two side wings 74 of the bearing clamping plate 7 are sequentially penetrated into the guiding limiting grooves 120b of the two guiding limiting members 12b of the windshield wiper joint bracket 1b, the two fins on the limiting elastic sheet 21b are respectively clamped with the two limiting matching surfaces 132 of the longitudinal limiting part 13b, the preliminary positioning of the elastic supporting component 2b and the windshield wiper joint bracket 1b is realized, the elastic supporting component 2b and the windshield wiper adhesive tape 3 are locked on the bearing clamping plate 7 through the two locking members 5b positioned at the two ends of the bearing clamping plate 7, finally, the two jackets 4b respectively arranged at the two sides of the windshield wiper joint bracket 1b, the inner cavity of the wiper connector bracket is hollow, the bottom is provided with an opening end 41b along the length direction of the wiper connector bracket, two sides of the bottom, which are positioned in the direction of the opening end 41b, are provided with sliding grooves 42b for penetrating through two side wings 74 of the bearing clamping plate 7, the outer side is provided with a guide surface 43, the two sliding grooves 42b of each sheath 4b are respectively sleeved on the two side wings 74 of the bearing clamping plate 7, one end of each sliding groove is in nested limit fit with the corresponding locking member 5b, the other end of each sliding groove is inserted into the inner cavity of the wiper connector bracket 1b, the assembly of the whole wiper is realized, and of course, the embodiment of wrapping the locking member 5b by the sheath 4b is just one of the two side wings, the locking member 5b is arranged at the outer end of the sheath 4b, and the locking of the sheath, the bearing clamping plate, the elastic supporting part and the wiper rubber strip is also a conventional technical means.

While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (13)

1. An elastic support member having an arcuate sheet-like body extending in a longitudinal direction and having a curvature, the elastic support member (2 a, 2 b) being for giving a pre-bending to a wiper strip (3), characterized in that: when the elastic supporting parts (2 a, 2 b) are in a natural stretching state and are kept still along the horizontal direction, the elastic supporting parts (2 a, 2 b) are divided by a lateral central axis Y, a first arc-shaped component (I) and a second arc-shaped component (II) are respectively formed at two ends, the first arc-shaped component (I) is provided with a first bending base point (G1), the second arc-shaped component (II) is provided with a second bending base point (G2), the curvature radius of the first arc-shaped component (I) at the first bending base point (G1) is minimum, the curvature radius of the second arc-shaped component (II) at the second bending base point (G2) is minimum, and the ground clearance of a connecting line of the first bending base point (G1) and the second bending base point (G2) is smaller than the ground clearance of a central point O.

2. The resilient support member of claim 1 wherein: the first arc-shaped component (I) and the second arc-shaped component (II) are symmetrically distributed along the lateral central axis Y of the elastic supporting parts (2 a, 2 b), and the curvature radius of the first arc-shaped component (I) is gradually increased from the first bending base point (G1) to two ends.

3. The elastic support member according to claim 1 or 2, wherein: when the elastic support members (2 a, 2 b) are pressed against each other in a horizontal plane, the length M1 from the first bending base point (G1) to the second bending base point (G2) is between 1/3 and 2/3 of the total length L2 of the elastic support members (2 a, 2 b).

4. A boneless wiper, characterized in that: it comprises the steps of (a) a step of,

the wiper joint support (1 a, 1 b) is provided with a mounting part (11) for receiving a wiper arm at the middle part, at least two ends of the mounting part extend outwards along the length direction of the mounting part to form a cover member with a downward opening, and the inner cavity wall of the cover member comprises two guiding limiting members (12 a, 12 b) and at least one longitudinal limiting part (13 a, 13 b);

at least one elastic supporting component (2 a, 2 b) according to any one of claims 1-3, wherein the elastic supporting component (2 a, 2 b) is directly or indirectly assembled in the two guiding and limiting components (12 a, 12 b) through an intermediate connecting piece (7), and the elastic supporting component (2 a, 2 b) is also provided with a clamping part (21 a, 21 b) for realizing longitudinal limiting fit with the longitudinal limiting parts (13 a, 13 b);

wherein the two guiding and limiting members (12 a, 12 b) are respectively opposite to the first bending base point (G1) and the second bending base point (G2), so that the wiper joint brackets (1 a, 1 b) transmit the pushing force applied on the wiper arms to the elastic supporting parts (2 a, 2 b) through the guiding and limiting members (12 a, 12 b);

a wiper strip (3), wherein the wiper strip (3) can be connected with the elastic supporting components (2 a, 2 b) directly or through an intermediate connecting piece (7) and receives the pushing force transmitted by the elastic supporting components (2 a, 2 b);

two sheaths (4 a, 4 b) which are arranged at the two ends of the wiper joint support (1 a, 1 b) and are used for wrapping the parts of the elastic supporting parts (2 a, 2 b) which extend outwards from the wiper joint support (1 a, 1 b), and simultaneously, the sheaths (4 a, 4 b) and the outer side surfaces of the wiper joint support (1 a, 1 b) form diversion surfaces (43, 14) which are beneficial to reducing wind resistance generated in the wiper scraping process.

5. The boneless wiper of claim 4, wherein: the distance L1 between the two guiding and limiting members (12 a, 12 b) is smaller than the length M1 from the first bending base point (G1) to the second bending base point (G2), the length M1 is 150mm less than or equal to L1 less than or equal to 300mm, the total length L2 of the elastic supporting components (2 a, 2 b) is positively correlated with the length L1 between the two guiding and limiting members (12 a, 12 b), and the setting range is 300mm less than or equal to L2 less than or equal to 800mm.

6. The boneless wiper of claim 5, wherein: the distance L1 between the two guide limiting members (12 a, 12 b) is 175mm 250mm, and the total length L2 of the elastic supporting components (2 a, 2 b) is set within 350mm 700 mm.

7. The boneless wiper of claim 4, wherein: the longitudinal limit parts (13 a, 13 b) are arranged at positions far away from the mounting part (11).

8. The boneless wiper of claim 7, wherein: the longitudinal limit parts (13 a, 13 b) are arranged at positions overlapping and abutting with the guide limit members (12 a, 12 b).

9. The boneless wiper of any one of claims 4-8, wherein: it does not include an intermediate connection;

the cover member of the wiper joint bracket (1 a) is provided with two side walls (10) which are arranged at intervals along the width direction and are basically parallel, the two side walls (10) respectively form a chute (120 a) which is just used for directly assembling the elastic supporting component (2 a) inwards, an opening for the wiper rubber strip (3) to pass through is formed between the bottom edges (1203 a) of the two chute (120 a), and the two chute (120 a) jointly construct a guiding and limiting member (12 a);

the longitudinal limiting member is a limiting block (13 a) which is arranged at the inner side wall end of the chute (120 a) or is inwards convexly arranged at the two side walls (10) and positioned at the area adjacent to the guiding limiting member (12 a);

a crack (22 a) for the windshield wiper rubber strip (3) to penetrate is formed at the longitudinal center shaft part of the elastic supporting component (2 a), a limiting notch (21 a) is correspondingly formed in the position of the elastic supporting component (2 a) relative to the limiting block (13 a), and the limiting notch (21 a) is configured as the clamping part;

the wiper strip (3) is directly fitted and fixed in a nip (22 a) formed by the elastic support member (2 a).

10. The boneless wiper of claim 9, wherein: each sliding groove (120 a) comprises a top edge (1201 a), a side edge (1202 a), a bottom edge (1203 a) and a positioning rib (1204 a), wherein the side edge (1202 a) is convexly arranged on the inner side end face of the side wall (10), the top edge (1201 a), the side edge (1202 a) and the bottom edge are encircled to form a U-shaped component, the top edge (1201 a) of each sliding groove (120 a) is mutually connected to form a transverse connecting section (A), the positioning rib is convexly arranged on the inner side end face of the top edge and is provided with a first straight edge and a second straight edge which are mutually perpendicular, the first straight edge is parallel to the length direction of the windshield wiper connector bracket, the first straight edge is parallel to the bottom edge and is staggered, two ends of the second straight edge are respectively connected with the side edge and the first straight edge, and the vertical distance between the positioning rib and the bottom edge is matched with the thickness of the elastic supporting component.

11. The boneless wiper of any one of claims 4-8, wherein: the novel windshield wiper strip comprises a middle connecting piece (7), wherein the middle connecting piece is a bearing clamping plate (7), the bearing clamping plate (7) is in a strip shape, a first accommodating groove (71) and a second accommodating groove (72) are sequentially formed from top to bottom, the first accommodating groove (71) is used for penetrating an elastic supporting component (2 b), at least one open end for exposing a clamping part (21 b) of the elastic supporting component (2 b) is formed at the top of the first accommodating groove (71), a notch (73) for penetrating a windshield wiper strip (3) is formed at the bottom of the second accommodating groove (72), and a side wing (74) extending outwards along the width direction of the boundary of the first accommodating groove (71) and the second accommodating groove (72) is formed at the same time;

the cover member of the wiper joint bracket (1 b) is provided with two side walls (10) which are arranged at intervals along the width direction and are basically parallel, the two side walls (10) respectively inwards form guide limit grooves (120 b) for the two wings (74) of the bearing clamping plate (7) to pass through, the upper parts of the two guide limit grooves (120 b) form a transverse connecting sheet (121 b), the two guide limit grooves (120 b) and the connecting sheet (121 b) are jointly constructed into the guide limit member (12 b), at the same time, the connecting sheet (121 b) of at least one guide limit member (12 b) is provided with a positioning part (13 b) towards the direction of the elastic supporting part (2 b), and the positioning part (13 b) is constructed into a longitudinal limit part (13 b);

the upper surface of the elastic supporting component (2 b) is provided with a clamping part (21 b) at a position opposite to the positioning part (13 b), and the clamping part (21 b) is used for mutually clamping and limiting and matching with the positioning part (13 b) of the windshield wiper joint bracket (1 b), so that the elastic supporting component (2 b) is limited relative to the windshield wiper joint bracket (1 b) along the length direction.

12. The windshield wiper rubber strip (3) is arranged in the second accommodating groove (72) of the bearing clamping plate (7) in a penetrating mode.

13. The boneless wiper of claim 11, wherein: the positioning part (13 b) is composed of positioning blocks (131 a) protruding on the connecting sheet (121 b), and limiting matching surfaces (132) are formed on two side end surfaces of the positioning blocks (131) along the length direction;

the clamping part (21 b) of the elastic supporting part (2 b) is formed by a limiting elastic piece (211), the limiting elastic piece (211) is in a sheet shape, a pair of fins (212) with upwards-opened splayed shapes are formed by upward extension, the limiting elastic piece (211) is arranged on the upper surface of the elastic supporting part (2 b) and cannot generate relative displacement along the length and width directions with the upper surface of the elastic supporting part, and the free ends of the openings of the two fins (212) of the limiting elastic piece (211) are respectively clamped and in limiting fit with the limiting fit surfaces on the two sides of the positioning block (131).