A window scraper

Abstract

The present invention discloses a window scraper, which relates to the field of cleaning tools, including a handle assembly and a scraper strip, wherein two frames are symmetrically connected to the ends of the handle assembly, the frames extend in a direction away from the handle assembly, and the frames can be elastically bent relative to the handle assembly; the scraper strip is fixedly connected to the frames, and the frames are arranged parallel to the scraper strip; the frames include a plurality of support segments, the support segments extend in a direction away from the handle assembly, and a plurality of the support segments are sequentially connected along a length direction, and in a cross section perpendicular to the length direction of the support segments, the width of the support segments is greater than the thickness of the support segments; the plurality of the support segments are twisted around an axis to form different angles, and the twisting angle of the support segments gradually increases in a direction away from the handle assembly. In the present invention, the forces on both sides of the frames are small, the friction is small, the scraper strip can completely fit the surface to be cleaned, the user is convenient to use, and the cleaning efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of cleaning tools, in particular to a window scraper. Background Art

[0002] A window scraper is a common cleaning tool, which includes a handle and a flexible scraper. When in use, the user holds the handle and attaches the scraper to the door, window or other surface to be cleaned, and moves the handle to drive the scraper along the surface to be cleaned, thereby scraping off water or stains on the surface to be cleaned.

[0003] The scraping bar of a common window scraper is generally straight, which cannot remove dirt and scale from smooth surfaces with irregular curves. In some related technologies, a skeleton with a certain elasticity is used inside the scraping bar to allow the scraping bar to deform to a certain extent, so as to fit the curved surface to be cleaned.

[0004] In actual use, if the scraper frame is too flexible, it cannot support the scraper to work. If the scraper frame is too rigid, it can only be used on some surfaces with a small curvature to be cleaned. As the curvature of the curved surface increases, the deformation of the two ends of the rigid frame is greater than the deformation in the middle, and the force on both sides of the rigid frame becomes greater and greater, resulting in greater friction between the scraper and the glass near the two sides, making it very laborious to work; at the same time, the rigid frame cannot fully fit the surface to be cleaned on an uneven surface, resulting in areas on the surface to be cleaned that cannot be cleaned. Summary of the invention

[0005] In order to solve the defects of the window scraper in the prior art, that is, the rigid frame is subjected to large forces on both sides, the friction is large, and the window scraper cannot completely fit the surface to be cleaned, the present invention provides a window scraper.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] The present invention provides a window scraper, comprising a handle assembly and a scraper strip, wherein two frames are symmetrically connected to both sides of the end of the handle assembly, the frames extend in a direction away from the handle assembly, and the frames can be elastically bent relative to the handle assembly; the scraper strip is fixedly connected to the frames, and the frames are arranged parallel to the scraper strip;

[0008] The skeleton includes a plurality of support segments, each of which extends in a direction away from the handle assembly. The plurality of support segments are connected in sequence along the length direction. In a cross section perpendicular to the length direction of the support segments, the width of the support segments is greater than the thickness of the support segments. The plurality of support segments are twisted around an axis to form different angles, and the twisting angle of the support segments gradually increases in a direction away from the handle assembly.

[0009] In this solution, the window scraper drives the scraper strip to move for cleaning through the handle assembly. Two frames are symmetrically connected on both sides of the end of the handle assembly, and the scraper strip is supported by the frames; the frames can be elastically bent relative to the handle assembly, thereby driving the flexible scraper strip to bend and deform to fit the curved surface to be cleaned. The frame includes a plurality of support segments connected in sequence along the length direction, and the width of the support segment is greater than its thickness, so that the support segment is flat in the cross section perpendicular to the length direction of the support segment, and the plurality of support segments are twisted around their axis (i.e., the center line of the length direction of the support segment) to different angles, so that each support segment has a different contact angle with the surface to be cleaned.

[0010] When one side of the support segment along the thickness direction contacts the surface to be cleaned through the scraper bar, the interaction force between the support segment and the surface to be cleaned is perpendicular to the thickness direction of the support segment and is transmitted along the width direction of the support segment; when one side of the support segment along the width direction contacts the surface to be cleaned through the scraper bar, the interaction force between the support segment and the surface to be cleaned is perpendicular to the width direction of the support segment and is transmitted along the thickness direction of the support segment; since the width of the support segment is greater than the thickness of the support segment, the support segment is not easy to deform when the action force between the support segment and the surface to be cleaned is along the width direction of the support segment, and the support segment is easy to deform when the action force between the support segment and the cleaning surface is along the thickness direction of the support segment.

[0011] In the present solution, multiple support segments are twisted into different angles, and the twisting angle of the support segments gradually increases in the direction away from the handle assembly, thereby causing the force of the support segments close to the handle assembly to be transmitted along the width direction of the support segments, making the support segments here less likely to deform; and in the direction away from the handle assembly, the support segments are gradually twisted, causing the force between the support segments and the surface to be cleaned to gradually deviate toward the thickness direction of the support segments, making the support segments here more likely to bend and deform; therefore, when the window scraper acts on the surface to be cleaned, the frame at the location of the handle assembly has better anti-bending ability and is not easily deformed, fitting the middle part of the curved surface to be cleaned; the end of the frame away from the handle assembly has poor anti-bending ability and is easily deformed to fit the larger curvature at both ends of the curved surface to be cleaned, so that while the ends of the frame fit the parts at both ends of the surface to be cleaned, the elastic force of the ends of the frame acting on the surface to be cleaned is smaller, thereby reducing the friction between the two ends of the scraper strip and the two ends of the surface to be cleaned, making it convenient for users to use. At the same time, the supporting sections on the skeleton are gradually twisted in sequence, so that the bending resistance of the skeleton is gradually weakened in the direction away from the handle assembly, so as to fit the shape of the curved surface to be cleaned with the gradually increasing degree of curvature from the middle to the two ends, so that the skeleton can support the scraper to fit the curved surface to be cleaned, thereby ensuring the cleaning effect.

[0012] Furthermore, along the direction away from the handle assembly, the relative twisting angle of two adjacent support segments gradually increases.

[0013] In the present solution, when the window scraper is used on a curved surface to be cleaned, the tangent slope of the surface to be cleaned gradually increases in the direction away from the middle portion (i.e., the degree of curvature gradually increases); the relative twisting angle of two adjacent support segments gradually increases in the direction away from the handle assembly, that is, the increment of the twisting angle of the support segment in the direction away from the handle assembly also increases, so that the attenuation of the anti-bending ability of the support segment in the direction away from the handle assembly also gradually increases to adapt to the gradually curved shape of the two ends of the surface to be cleaned.

[0014] Furthermore, the twisting angle of the support segment farthest from the handle assembly compared to the support segment closest to the handle assembly does not exceed 90°.

[0015] In this solution, the angle between the width direction and the thickness direction of the support segment is 90°. After the support segment is twisted 90°, the force originally transmitted along its width direction can be displaced and transmitted along its thickness direction. The structural setting ensures that the relative twist angle between the support segment closest to the handle assembly and the support segment farthest from the handle assembly does not exceed 90°, which can ensure that the anti-bending ability of the skeleton gradually weakens in the direction in which the handle assembly extends outward, so as to avoid the support segment far from the handle assembly from twisting at an excessively large angle, which increases the anti-bending ability of the support segment instead of reducing it (for example, when twisted 180°, the force on the surface to be cleaned is transmitted along the width direction of the support segment, and the support segment is not prone to bending and deformation).

[0016] Furthermore, each of the skeletons includes four support segments, and along the direction away from the handle assembly, the four support segments are defined as a first support segment, a second support segment, a third support segment and a fourth support segment, respectively. The second support segment is twisted at an angle of 10° relative to the first support segment, the third support segment is twisted at an angle of 20° relative to the second support segment, and the fourth support segment is twisted at an angle of 30° relative to the third support segment.

[0017] In this solution, after testing, it was found that this angle setting method can achieve maximum balance of forces between multiple support segments.

[0018] Furthermore, the length of the support section in the skeleton far from the handle assembly part is greater than the length of the support section close to the handle assembly part.

[0019] In this solution, as the slope of the curved surface increases, the portion of the curved surface that is bent per unit distance away from the center of the curved surface becomes larger, and the length of the support section away from the handle assembly becomes longer, so as to satisfy the shape of the curved surface to be cleaned with the slope gradually increasing in the direction away from the center, so that the support section away from the handle assembly can better and continuously fit the surface to be cleaned.

[0020] Furthermore, each of the skeletons includes four support segments, and along the direction away from the handle assembly, the four support segments are defined as a first support segment, a second support segment, a third support segment and a fourth support segment in sequence; the length ratio of the first support segment, the second support segment, the third support segment and the fourth support segment is 1:2:2.5:2.5.

[0021] Furthermore, a mounting cavity is provided in the scraper strip along the length direction, and the frame is buried in the mounting cavity;

[0022] A connection node is formed at the connection between adjacent support segments, and the connection node fits into the installation cavity; along a direction perpendicular to the length of the support segment, the cross section of the connection node is larger than the cross section of the support segment.

[0023] In this solution, connecting nodules are formed at adjacent supporting segments, and the cross-section of the connecting nodules is larger than the cross-section of the supporting segments, so that the structural strength of the connecting portion of the supporting segments is better; the skeleton is buried in the mounting cavity inside the scraper strip to prevent the skeleton from being exposed, and the connecting nodules fit into the mounting cavity, that is, the shape and size of the connecting nodules are the same as those of the mounting cavity, so that the skeleton is stably set in the mounting cavity and is not prone to shaking.

[0024] Furthermore, one end of the two skeletons close to the handle assembly are fixedly connected to each other, and the skeleton is rotatably connected to the handle assembly.

[0025] In this solution, the two frames are fixedly connected at one end close to the handle assembly, so that the two symmetrically arranged frames are connected into one body, the overall structure is more stable and reliable, and it is convenient to synchronously adjust the positions of the two frames.

[0026] Furthermore, a rotation cavity is provided at the end of the handle assembly, a rotation member is rotatably arranged in the rotation cavity, and the rotation member is circumferentially fixedly connected to the frame;

[0027] The handle assembly is further provided with a dial window communicated with the rotating chamber, and the rotating member is provided with a dial piece, which extends out of the dial window.

[0028] In the present embodiment, the handle assembly is provided with a rotating part by rotating the rotating cavity, and the rotating part is fixed to the frame, so that the rotating part can be driven to rotate by turning the paddle extending out of the turning window, thereby driving the fixing device to rotate, so that the contact angle between the supporting section at one end of the frame away from the handle assembly and the surface to be cleaned changes, thereby being able to adapt to surfaces to be cleaned with different degrees of curvature.

[0029] Furthermore, a scraper strip limiting groove is formed at the end of the handle assembly, the scraper strip limiting groove is connected to the rotating chamber, and the scraper strip is fixedly embedded in the scraper strip limiting groove;

[0030] A cylindrical space is formed on the side of the scraper strip facing the rotating chamber. The outer periphery of the rotating member is cylindrical, and the rotating member can be rotatably matched in the cylindrical space.

[0031] In this solution, the handle assembly is installed with a scraper strip through a scraper strip limiting groove, so that the handle assembly also has a scraper strip to ensure the cleaning effect; the scraper strip is shaped so that it forms a cylindrical space with the rotating cavity to rotate with the rotating part, and its structure is reasonable and simple, and it is easy to manufacture.

[0032] In summary, the present invention has the following beneficial effects:

[0033] In the present invention, multiple support segments are twisted into different angles, and the twisting angle of the support segments gradually increases in the direction away from the handle assembly, so that the force of the support segment close to the handle assembly is transmitted along the width direction of the support segment, so that the support segment here is not easy to deform; and in the direction away from the handle assembly, the support segment gradually twists, so that the force between the support segment and the surface to be cleaned gradually deviates to the thickness direction of the support segment, so that the support segment here is easy to bend and deform. Therefore, when the window scraper acts on the surface to be cleaned, the bending resistance of the skeleton where the handle assembly is located is better, not easy to deform, and fits the middle part of the curved surface to be cleaned; the bending resistance of one end of the skeleton away from the handle assembly is poor, and it is easy to deform to fit the larger bending degree at both ends of the curved surface to be cleaned, so that the ends of the skeleton are in contact with the parts at both ends of the surface to be cleaned, and the elastic force of the ends of the skeleton acting on the surface to be cleaned is small, so that the friction between the two ends of the scraper strip and the two ends of the surface to be cleaned is reduced, which is convenient for users to use. At the same time, the supporting sections on the skeleton are gradually twisted in sequence, so that the bending resistance of the skeleton is gradually weakened in the direction away from the handle assembly, so as to fit the shape of the curved surface to be cleaned with the gradually increasing degree of curvature from the middle to the two ends, so that the skeleton can support the scraper to fit the curved surface to be cleaned, thereby ensuring the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of a window scraper according to an embodiment of the present invention.

[0035] Figure 2 It is a schematic diagram of the cross-sectional structure of a window scraper according to an embodiment of the present invention, passing through the central axis of the handle assembly and perpendicular to the length direction of the frame.

[0036] Figure 3 It is a schematic diagram of the exploded structure of a window scraper according to an embodiment of the present invention.

[0037] Figure 4 It is a schematic diagram of the cross-sectional structure of a window scraper passing through the central axis of a frame according to an embodiment of the present invention.

[0038] Figure 5It is a schematic diagram of the three-dimensional structure of a skeleton according to an embodiment of the present invention.

[0039] Figure 6 It is a schematic diagram of the cross-sectional structure of a support segment along a direction perpendicular to the length of the skeleton according to an embodiment of the present invention.

[0040] Figure 7 It is a schematic diagram of the cross-sectional structure of the first supporting section along a direction perpendicular to the length of the skeleton according to an embodiment of the present invention.

[0041] Figure 8 It is a schematic diagram of the cross-sectional structure of the second supporting segment along a direction perpendicular to the length of the skeleton according to an embodiment of the present invention.

[0042] Fig. 9 It is a schematic diagram of the cross-sectional structure of the third supporting segment along a direction perpendicular to the length direction of the skeleton according to an embodiment of the present invention.

[0043] Fig.10 It is a schematic diagram of the cross-sectional structure of the fourth supporting segment along a direction perpendicular to the length direction of the skeleton according to an embodiment of the present invention.

[0044] Fig.11 A schematic diagram of the three-dimensional structure of a window scraper with a relatively small curvature of the scraper strip according to an embodiment of the present invention.

[0045] Fig.12 It is a schematic structural diagram of a window scraper when the scraper strip has a large bending degree according to an embodiment of the present invention.

[0046] In the figure:

[0047] 1000, window scraper; 100, handle assembly; 110, holding part; 111, rotating groove; 112, pivot; 120, connecting part; 121, rotating cavity; 122, sliding window; 123, scraper bar limiting groove; 130, hanging rope; 140, rotating part; 141, spline groove; 150, paddle; 200, scraper bar; 210, mounting cavity; 300, skeleton; 310, support section; 311, first support section; 312, second support section; 313, third support section; 314, fourth support section; 320, connecting node; 330, rubber coating; 400, spline. DETAILED DESCRIPTION

[0048] The present invention will be further described below in conjunction with the accompanying drawings.

[0049] This embodiment discloses a window scraper 1000, referring to Figure 1The window scraper 1000 includes a handle assembly 100 and a scraper strip 200. The scraper strip 200 is connected to the end of the handle assembly 100 and extends to both sides of the handle assembly 100. The scraper strip 200 is flexible and can fit the surface to be cleaned. The handle assembly 100 drives the scraper strip 200 to move relative to the surface to be cleaned for cleaning.

[0050] It should be noted that the window scraper 1000 disclosed in this embodiment is not limited to window cleaning, but can also be used to clean doors, desktops, curtain walls or other surfaces to be cleaned.

[0051] Reference Figure 1 The handle assembly 100 includes a gripping portion 110 and a connecting portion 120. The gripping portion 110 is cylindrical in shape for easy gripping by a user, and the connecting portion 120 is connected to the end of the gripping portion 110, and the connecting portion 120 is connected to the scraper strip 200.

[0052] Reference Figure 1 and Figure 2 In this embodiment, the gripping portion 110 is rotatably connected to the connecting portion 120. Specifically, a rotation groove 111 is provided at the end of the gripping portion 110, and one end of the connecting portion 120 close to the gripping portion 110 is flat and inserted into the rotation groove 111. The gripping portion 110 passes through the connecting portion 120 through a pivot 112 inserted into the rotation groove 111 to rotatably connect the connecting portion 120. Thus, the connecting portion 120 and the scraper 200 can rotate relative to the gripping portion 110, so that the scraper 200 can work at different angles relative to the gripping portion 110, so as to clean the blind spots.

[0053] A hanging rope 130 is provided at one end of the holding portion 110 away from the connecting portion 120 so as to hang the window scraper 1000 when not in use.

[0054] Reference Figure 3 Two frames 300 are symmetrically connected to the two sides of the connection part 120 away from the gripping part 110. The frames 300 extend in a direction away from the connection part 120, and the frames 300 can be elastically bent relative to the handle assembly 100. The scraper bar 200 is fixedly connected to the frames 300, and the frames 300 are arranged parallel to the scraper bar 200. The scraper bar 200 is supported by the frames 300, so that the flexible scraper bar 200 can fit the surface to be cleaned for cleaning, and the frames 300 can be elastically bent relative to the handle assembly 100, thereby driving the flexible scraper bar 200 to bend and deform to fit the curved surface to be cleaned.

[0055] In this embodiment, one end of the two skeletons 300 close to the connecting part 120 is fixedly connected to each other, so that the two symmetrically arranged skeletons 300 are connected into one body, and the overall structure is more stable and reliable. The two skeletons 300 are rotatably connected to the handle assembly 100, which is convenient for synchronously rotating and adjusting the positions of the two skeletons 300.

[0056] Specifically, combined Figures 1 to 3 The end of the connecting portion 120 is provided with a rotating cavity 121, and a rotating member 140 is rotatably arranged in the rotating cavity 121, and the rotating member 140 is fixedly arranged on the frame 300 in the circumferential direction. A toggle window 122 communicating with the rotating cavity 121 is arranged on the outer side of the connecting portion 120, and a paddle 150 is arranged on the rotating member 140, and the paddle 150 extends out of the toggle window 122. By toggling the paddle 150 extending out of the toggle window 122, the rotating member 140 can be driven to rotate, and the frame 300 can be driven to rotate, so that the contact angle between the support section 310 at one end of the frame 300 away from the handle assembly 100 and the surface to be cleaned changes, so as to adapt to surfaces to be cleaned with different degrees of curvature.

[0057] In this embodiment, the outer circumference of the rotating member 140 is cylindrical so as to be easily rotated in the rotating cavity 121. A scraper bar limiting groove 123 is provided at the end of the connecting portion 120 away from the holding portion 110, and the scraper bar limiting groove 123 passes through the end of the connecting portion 120 away from the holding portion 110. The scraper bar limiting groove 123 is connected to the rotating cavity 121, and the scraper bar 200 is fixedly embedded in the scraper bar limiting groove 123, so that the scraper bar 200 can also clean the surface to be cleaned at the connecting portion 120, thereby ensuring the cleaning effect.

[0058] The scraper strip 200 and the rotating chamber 121 form a cylindrical space on one side thereof, and the rotating member 140 can be rotatably engaged in the cylindrical space, so that the rotating member 140 can be rotatably engaged through the cylindrical space to achieve the rotational engagement of the rotating member 140 and the connecting portion 120.

[0059] Reference Figures 2 to 4 The rotating member 140 is hollow inside and is provided with a spline groove 141, and the outer periphery of the part where the two skeletons 300 are connected to each other is provided with a spline 400. The connection between the two skeletons 300 is penetrated in the rotating member 140 and the spline 400 cooperates with the spline groove 141, thereby realizing the connection between the rotating member 140 and the skeleton 300. In addition, in other embodiments, the rotating member 140 and the skeleton 300 can also be connected in other suitable ways.

[0060] In this embodiment, the frame 300 is made of a rigid material with certain elasticity, such as plastic plus glass fiber, so that the frame 300 can stably support the scraper 200 for cleaning and bend and deform so that the scraper 200 fits the curved surface to be cleaned.

[0061] Reference Figure 5 and Figure 6 Each skeleton 300 includes a plurality of support segments 310, which are sequentially connected along the length direction, and the support segments 310 extend in a direction away from the connection portion 120. In a cross section perpendicular to the length direction of the support segment 310 (the X direction in the figure), the width of the support segment 310 (the Y direction in the figure) is greater than the thickness of the support segment 310 (the Z direction in the figure), so that in a cross section perpendicular to the length direction of the support segment 310, the support segment 310 is flat.

[0062] When one side of the support section 310 along the thickness direction contacts the surface to be cleaned through the scraper bar 200, the interaction force between the support section 310 and the surface to be cleaned is transmitted perpendicularly to the thickness direction of the support section 310 and along the width direction of the support section 310 (i.e., the Y direction in the figure). When one side of the support section 310 along the width direction contacts the surface to be cleaned through the scraper bar 200, the interaction force between the support section 310 and the surface to be cleaned is perpendicular to the width direction of the support section 310 and transmitted along the thickness direction of the support section 310 (i.e., the Z direction in the figure). Since the width of the support section 310 is greater than the thickness of the support section 310, when the action force between the support section 310 and the surface to be cleaned is transmitted along the width direction of the support section 310, the support section 310 has a strong anti-bending ability and is not prone to bending deformation, while when the action force between the support section 310 and the cleaning surface is along the thickness direction of the support section 310, the support section 310 has a weak anti-bending ability and is prone to bending deformation.

[0063] Among them, multiple support segments 310 are twisted around their axes (i.e., the center line of the length direction of the support segment 310) to different angles, thereby making the contact angles of each support segment 310 with the surface to be cleaned different. And the twisting angle of the support segment 310 gradually increases in the direction away from the connection portion 120, so that the force of the support segment 310 close to the connection portion 120 is transmitted along the width direction of the support segment 310, so that the support segment 310 here is not easy to deform. In the direction away from the connection portion 120, the support segment 310 gradually twists, so that the force between the support segment 310 and the surface to be cleaned gradually deviates to the thickness direction of the support segment 310, so that the support segment 310 here is easy to bend and deform.

[0064] Therefore, when the window scraper 1000 acts on the surface to be cleaned, the frame 300 near the connection part 120 has a better bending resistance and is not easy to deform, so it fits the middle part of the curved surface to be cleaned. The frame 300 at one end away from the handle assembly 100 has a poor bending resistance and is easy to deform to fit the larger bending degree at both ends of the curved surface to be cleaned, so that when the ends of the frame 300 fit the parts at both ends of the surface to be cleaned, the elastic force of the ends of the frame 300 acting on the surface to be cleaned is small, and the friction between the two ends of the scraper strip 200 and the two ends of the surface to be cleaned is reduced, which is convenient for users to use. At the same time, the support sections 310 on the frame 300 are gradually twisted in sequence, so that the bending resistance of the frame 300 is gradually weakened in the direction away from the handle assembly 100, so as to fit the shape of the curved surface to be cleaned with the gradually increasing bending degree from the middle to the two ends, so that the frame 300 can support the scraper strip 200 to fit the curved surface to be cleaned, and ensure the cleaning effect.

[0065] In this embodiment, along the length direction perpendicular to the support section 310, the cross section of the support section 310 is elliptical, and the semi-major axis direction is the width direction, and the semi-minor axis direction is the thickness direction. The support section 310 of this shape facilitates the transmission of the force. No matter what angle the support section 310 is twisted, the stress can be stably transmitted to the support section 310. Since the support section 310 has no obvious edge, it is not easy to damage the scraper strip 200 due to stress concentration. In addition, in other embodiments, the cross section of the support section 310 can also be other suitable shapes, as long as its width and thickness are different.

[0066] When the window scraper 1000 is used on a curved surface to be cleaned, the slope of the tangent line of the surface to be cleaned gradually increases in the direction away from the middle portion, that is, the degree of curvature gradually increases. In this embodiment, the relative twisting angle of two adjacent support segments 310 gradually increases in the direction away from the connection portion 120, that is, the increment of the twisting angle of the support segment 310 also increases in the direction away from the connection portion 120, so that the attenuation of the anti-bending ability of the support segment 310 in the direction away from the handle assembly 100 also gradually increases to adapt to the shape of the gradually increasing degree of curvature of the two ends of the surface to be cleaned.

[0067] In this embodiment, the twist angle of the support segment 310 farthest from the handle assembly 100 is no more than 90° compared to the support segment 310 closest to the handle assembly 100. Since the angle between the width direction and the thickness direction of the support segment 310 is 90°, the force originally transmitted along its width direction can be displaced and transmitted along its thickness direction after the support segment 310 is twisted by 90°. By setting the structure so that the relative twist angle between the support segment 310 closest to the handle assembly 100 and the farthest support segment 310 does not exceed 90°, it can be ensured that the anti-bending ability of the skeleton 300 is gradually weakened in the direction in which the handle assembly 100 extends outward, so as to avoid the support segment 310 far away from the handle assembly 100 from twisting too much, so that the anti-bending ability of the support segment 310 is increased instead of reduced (for example, when twisted by 180°, the force on the surface to be cleaned is transmitted along the width direction of the support segment 310, and the support segment 310 is not easy to bend and deform).

[0068] Specifically, refer to Figures 5 to 10 , this embodiment is illustrated in the following manner: each skeleton 300 includes four support segments 310, and along the direction away from the handle assembly 100, the four support segments 310 are defined as the first support segment 311, the second support segment 312, the third support segment 313 and the fourth support segment 314 in sequence. Among them, the twisting angle of the first support segment 311 is 0°, and the twisting angle of the second support segment 312 relative to the first support segment 311 is 10°; the twisting angle of the third support segment 313 relative to the second support segment 312 is 20°, that is, the twisting angle of the third support segment 313 is 30°; the twisting angle of the fourth support segment 314 relative to the third support segment 313 is 30°, that is, the twisting angle of the fourth support segment 314 is 60°. After testing, this angle setting method can achieve the maximum balance of the forces between the multiple support segments 310, and the maximum twisting angle of the support segment 310 does not exceed 90°, which meets the use requirements.

[0069] The length of the support section 310 of the frame 300 away from the handle assembly 100 is greater than the length of the support section 310 near the handle assembly 100. As the slope of the curved surface increases, the greater the portion of the curved surface that is bent within a unit distance away from the middle of the curved surface, the longer the support section 310 away from the handle assembly 100 is, so as to meet the shape of the curved surface to be cleaned with a gradually increasing slope in the direction away from the middle, so that the support section 310 away from the handle assembly 100 can better and continuously fit the surface to be cleaned.

[0070] In this embodiment, the length ratio of the first support segment 311, the second support segment 312, the third support segment 313 and the fourth support segment 314 is 1:2:2.5:2.5, so that the length of the support segment 310 gradually increases in the direction away from the connecting portion 120 and can be bent and fit the surface to be cleaned. In addition, in other embodiments, the length ratio of the first support segment 311, the second support segment 312, the third support segment 313 and the fourth support segment 314 can also be other suitable values.

[0071] Reference Figures 4 to 6 In this embodiment, the connection of adjacent support segments 310 forms a connection node 320. Specifically, the connection node 320 is disc-shaped, and the two sides of the connection node 320 are smoothly transitioned with the two support segments 310. Among them, the radius of the connection node 320 is the same as the semi-major axis length of the elliptical cross-section of the support segment 310, so that the cross-section of the connection node 320 is larger than the cross-section of the support segment 310, so that the structural strength of the connection of the support segment 310 is better. At the same time, the support segment 310 and the connection node 320 are coaxially arranged, so that the structure of the skeleton 300 is more stable and reasonable.

[0072] The scraper strip 200 is provided with a mounting cavity 210 along the length direction, and the frame 300 is buried in the mounting cavity 210 to prevent the frame 300 from being exposed and to improve the service life of the frame 300. In this embodiment, the mounting cavity 210 has a circular cross section, and the connecting node 320 fits in the mounting cavity 210, that is, the shape and size of the connecting node 320 are the same as those of the mounting cavity 210, so that the frame 300 is stably arranged in the mounting cavity 210 and is not easy to shake.

[0073] In this embodiment, the frame 300 can rotate relative to the scraper strip 200 and the connecting portion 120 to adjust the contact angle between each support segment 310 and the surface to be cleaned. Specifically, the paddle 150 is limited by the paddle window 122 to limit the angle of the rotating member 140, thereby limiting the rotation angle of the frame 300.

[0074] Reference Fig.11 When the paddle 150 is moved toward the holding portion 110, the skeleton 300 rotates to rotate the support segment 310 away from the connecting portion 120, so that the angle between the thickness direction of the support segment 310 and the direction of the force (i.e., perpendicular to the direction of the surface to be cleaned) becomes smaller, thereby weakening the bending resistance of the support segment 310, so that it is easier to bend and fit the curved surface to be cleaned with a larger curvature.

[0075] Reference Fig.12When the paddle 150 is moved in a direction away from the holding portion 110, the skeleton 300 rotates to rotate the support segment 310 away from the connecting portion 120, so that the angle between the width direction of the support segment 310 and the direction of the force becomes smaller, thereby making the support segment 310 more resistant to bending, so as to facilitate fitting to a curved surface to be cleaned with a smaller curvature.

[0076] Reference Figure 3 The outer periphery of the frame 300 is provided with a rubber coating layer 330, which is coated on the outside of the frame 300, and the shape of the rubber coating layer 330 is consistent with the shape of the frame 300, so as to enhance the strength and toughness of the frame 300. In this embodiment, the rubber coating layer 330 is made of rubber or carbon fiber. In addition, in other embodiments, the rubber coating layer 330 can also be made of other suitable materials.

[0077] The above description is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A window scraper, the window scraper (1000) comprising a handle assembly (100) and a scraper strip (200), characterized in that: Two frames (300) are symmetrically connected to both sides of the end of the handle assembly (100); the frames (300) extend in a direction away from the handle assembly (100); and the frames (300) are capable of elastically bending relative to the handle assembly (100); the scraper strip (200) is fixedly connected to the frames (300), and the frames (300) are arranged parallel to the scraper strip (200); The skeleton (300) comprises a plurality of support segments (310), wherein the support segments (310) extend in a direction away from the handle assembly (100), and the plurality of support segments (310) are sequentially connected along a length direction, and along a cross section perpendicular to the length direction of the support segment (310), the width of the support segment (310) is greater than the thickness of the support segment (310); the plurality of support segments (310) are twisted around an axis to form different angles, and along a direction away from the handle assembly (100), the twisting angle of the support segment (310) gradually increases; The length of the support section (310) of the skeleton (300) that is far from the handle assembly (100) is greater than the length of the support section (310) that is close to the handle assembly (100); The end of the handle assembly (100) is provided with a rotating cavity (121), a rotating member (140) is rotatably arranged in the rotating cavity (121), and the rotating member (140) is circumferentially fixedly connected to the frame (300); the handle assembly (100) is also provided with a dial window (122) connected to the rotating cavity (121), and a dial (150) is arranged on the rotating member (140), and the dial (150) extends out of the dial window (122); The interior of the rotating member (140) is hollow and provided with a spline groove (141); the outer periphery of the part where the two skeletons (300) are connected to each other is provided with a spline (400); the connection between the two skeletons (300) is penetrated into the rotating member (140) so that the spline (400) cooperates with the spline groove (141), thereby realizing the connection between the rotating member (140) and the skeleton (300).

2. A window scraper according to claim 1, characterized in that: In a direction away from the handle assembly (100), the relative twisting angle between two adjacent support segments (310) gradually increases.

3. A window scraper according to claim 1 or 2, characterized in that: The twisting angle of the support segment (310) farthest from the handle assembly (100) compared to the support segment (310) closest to the handle assembly (100) does not exceed 90°.

4. A window scraper as claimed in claim 2, characterized in that: Each of the skeletons (300) comprises four support segments (310), and along the direction away from the handle assembly (100), the four support segments (310) are defined as a first support segment (311), a second support segment (312), a third support segment (313) and a fourth support segment (314) in sequence, wherein the second support segment (312) is twisted at an angle of 10° relative to the first support segment (311), the third support segment (313) is twisted at an angle of 20° relative to the second support segment (312), and the fourth support segment (314) is twisted at an angle of 30° relative to the third support segment (313).

5. A window scraper as claimed in claim 1, characterized in that: Each of the skeletons (300) comprises four support segments (310), and along the direction away from the handle assembly (100), the four support segments (310) are defined as a first support segment (311), a second support segment (312), a third support segment (313) and a fourth support segment (314) in sequence; the ratio of the lengths of the first support segment (311), the second support segment (312), the third support segment (313) and the fourth support segment (314) is 1:2:2.5:2.

5.

6. A window scraper as claimed in claim 1, characterized in that: The scraper strip (200) is provided with a mounting cavity (210) along the length direction, and the frame (300) is buried in the mounting cavity (210); A connecting nodule (320) is formed at the connection between adjacent support segments (310), and the connecting nodule (320) fits into the mounting cavity (210); along a direction perpendicular to the length of the support segment (310), the cross-section of the connecting nodule (320) is larger than the cross-section of the support segment (310).

7. A window scraper as claimed in claim 1, characterized in that: The ends of the two skeletons (300) close to the handle assembly (100) are fixedly connected to each other, and the skeletons (300) are rotatably connected to the handle assembly (100).

8. A window scraper as claimed in claim 7, characterized in that: A scraper strip limiting groove (123) is provided at the end of the handle assembly (100), the scraper strip limiting groove (123) is connected to the rotating chamber (121), and the scraper strip (200) is fixedly embedded in the scraper strip limiting groove (123); A cylindrical space is formed on the side of the scraper strip (200) facing the rotating chamber (121); the outer circumference of the rotating member (140) is cylindrical, and the rotating member (140) is rotatably fitted in the cylindrical space.

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