A telescopic hand-held trowel for wall construction

Abstract

The utility model discloses a telescopic handheld trowelling scraper for wall construction, which comprises a main rod, a first telescopic rod, a second telescopic rod, a third telescopic rod, an adjusting assembly and a scraper face. The main rod and the three-stage telescopic rod are nested in sequence, and the overall length is adjusted by locking with a fastening nut, so as to adapt to different construction heights and ranges. The adjusting assembly comprises a sliding sleeve, a tightening nut and a handle with anti-skid texture on the outer surface. The sliding sleeve can slide along the main rod to adjust the position of the handle, and the tightening nut is locked and fixed to improve the operation comfort. The scraper face is made of 304 stainless steel, and the outer surface is sprayed with a polytetrafluoroethylene anti-sticking coating. The scraper face is detachably connected through a U-shaped clamping plate, and the edge is smoothly processed, so that the scraper face is convenient to clean and maintain and can ensure the trowelling flatness. The scraper face has a reasonable structure, is convenient to use, can effectively improve the trowelling operation efficiency and quality of the wall surface, and is highly practical.

Description

Technical Field

[0001] This utility model relates to the field of construction, specifically to a retractable handheld plastering scraper for wall construction. Background Technology

[0002] Wall plastering is a crucial process in building construction that ensures the flatness of the wall surface and lays the foundation for subsequent decoration work. The hand-held plastering scraper is the core tool in this process, and its structural rationality directly affects construction efficiency, work quality, and the labor intensity of operators.

[0003] An existing authorized utility model patent (publication number: CN211974219U) discloses a special plastering scraper for machine-sprayed mortar walls, relating to the field of wall plastering devices. It includes an outer telescopic tube and an inner telescopic tube that can be telescopically fitted with the outer telescopic tube. One end of the outer telescopic tube is provided with a telescopic space that allows the inner telescopic tube to extend into it, forming a telescopic fit. A positioning mechanism for fixing the telescopic length of the inner telescopic tube is provided between the outer and inner telescopic tubes. It also includes a first positioning support block located on the side of the outer telescopic tube away from the inner telescopic tube, and a second positioning support block located on the side of the inner telescopic tube away from the outer telescopic tube. The tops of the first and second positioning support blocks are provided with scraper lines, and the winding reel is located on the side of the outer telescopic tube away from the inner telescopic tube. This utility model proposes a special plastering scraper for machine-sprayed mortar walls, which saves physical effort, is more suitable for hand gripping, and the scraper becomes telescopic to adapt to walls of different sizes.

[0004] The existing telescopic plastering scrapers cited in the above-mentioned patent still have many shortcomings in practical applications: First, the telescopic structure of the cited patent is a two-level nested design, with a limited range of telescopic adjustment, making it difficult to meet the construction needs of complex scenarios such as high walls and wide walls; Second, the handle position is fixed, and it cannot be flexibly adjusted according to the operator's height, construction posture, and working angle, which can easily lead to arm fatigue and affect the comfort of construction after long-term operation; Third, the scraper surface and connecting rod are mostly fixedly connected, and when the scraper surface is worn, deformed, or needs to be replaced with a scraper surface of a different specification, disassembly and replacement are inconvenient, increasing the tool maintenance cost.

[0005] Based on this, we propose a retractable handheld plastering scraper for wall construction. Utility Model Content

[0006] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a retractable handheld plastering scraper for wall construction.

[0007] According to the present invention, a telescopic handheld plastering scraper for wall construction includes a long strip-shaped main rod. A first telescopic rod is slidably inserted into the upper part of the main rod along the axial direction. A second telescopic rod is slidably inserted into the upper part of the first telescopic rod, and a third telescopic rod is slidably inserted into the upper part of the second telescopic rod. The first, second, and third telescopic rods are nested together to form a rod structure with multi-level adjustable length.

[0008] The top of the third telescopic rod is fixedly connected to a frame-like connecting bracket, and the top of the connecting bracket is fixedly connected to a clamping plate. The inner side of the clamping plate is fitted with a scraper surface for wall plastering and leveling. The scraper surface is rectangular and flat with rounded edges. The outer surface of the top of the main rod is slidably fitted with an adjustment component for adjusting the handle position.

[0009] The adjustment assembly includes an annular sliding sleeve adapted to the outer diameter of the main rod. The sliding sleeve can be freely slidably fitted onto the outer surface of the main rod along the axial direction. A locking nut is threaded through the radial surface of the sliding sleeve. The locking nut passes through the side wall of the sliding sleeve radially and can selectively abut against the outer surface of the main rod. The relative fixation of the sliding sleeve and the main rod is achieved by tightening force. The outer wall of the sliding sleeve is integrally forged into a horizontally extending receiving plate in the direction away from the main rod. The end of the receiving plate away from the sliding sleeve is integrally bent downward to form a handle for easy hand gripping. The outer surface of the handle has an anti-slip texture. The connection between the first telescopic rod and the main rod, the connection between the first telescopic rod and the second telescopic rod, and the connection between the second telescopic rod and the third telescopic rod are all threaded with fastening nuts for locking.

[0010] Preferably, the length adjustment is achieved through a three-level nested structure of the main pole, the first telescopic pole, the second telescopic pole, and the third telescopic pole, to adapt to the needs of different construction scenarios.

[0011] Preferably, the operator can loosen the fastening nuts at the connections between the first telescopic rod and the main rod, the first telescopic rod and the second telescopic rod, and the second telescopic rod and the third telescopic rod, according to the wall height and the working area. This allows the first telescopic rod to extend or retract relative to the main rod, the second telescopic rod relative to the first telescopic rod, and the third telescopic rod relative to the second telescopic rod through axial sliding, until the desired working length is reached. After the length is determined, the fastening nuts are tightened in the opposite direction, using the threaded locking force of the nuts to firmly secure each telescopic rod to its corresponding body, preventing relative slippage during construction and ensuring the stability of the plastering operation.

[0012] Preferably, the card plate has a U-shaped groove structure that matches the edge of the scraper surface, and the back of the scraper surface is closely fitted with the bottom of the groove of the card plate to form a surface contact snap-fit, thereby realizing the detachable fixing of the scraper surface and the card plate.

[0013] Preferably, the scraper surface is made of stainless steel and its outer surface is coated with a polytetrafluoroethylene anti-stick coating.

[0014] Preferably, the scraper surface is installed using a clamping plate at the top of the connecting frame. The clamping plate has a U-shaped groove structure that fits the edge of the scraper surface. During installation, the edge of the scraper surface is inserted into the U-shaped groove of the clamping plate, so that the back of the scraper surface is tightly fitted with the bottom of the groove of the clamping plate, forming a surface contact snap-fit, which enables the scraper surface and the clamping plate to be detachably fixed. During operation, the scraper surface, as the component that directly contacts the wall mortar, has a rectangular flat plate structure that ensures the smoothness of the plastering, and the rounded edges prevent scratching the wall substrate or bumping into the operator.

[0015] Preferably, the scraper surface is made of stainless steel and has a polytetrafluoroethylene non-stick coating on the outer surface, which can reduce the adhesion of mortar to the scraper surface, making it easier to clean after the work is done, and improving the smoothness of the plastering operation.

[0016] Preferably, the grip position adjustment is achieved through an adjustment component, which is an integrated unit comprising a sliding sleeve, a tightening nut, a receiving plate, and the grip. The sliding sleeve is adapted to the outer diameter of the main rod and can slide freely along the axial direction of the main rod. The operator can push the sliding sleeve to move on the outer surface of the main rod according to their height, working posture, and working angle, thereby adjusting the position of the receiving plate and the grip synchronously. When the grip reaches a comfortable grip position, the radial tightening nut of the sliding sleeve is tightened, so that the end of the nut abuts against the outer surface of the main rod. The tightening force achieves relative fixation between the sliding sleeve and the main rod, thereby locking the grip position. The anti-slip texture on the outer surface of the grip increases the friction between the hand and the grip, preventing the hand from slipping during operation.

[0017] Preferably, during construction, the operator holds the handle and uses the fixed-length main rod, first telescopic rod, second telescopic rod, and third telescopic rod to drive the connecting frame and scraper surface close to the wall, applying appropriate pressure to perform plastering and smoothing operations.

[0018] Preferably, the length adjustment of the three-stage telescopic rod is adapted to different wall heights and widths, the flexible positioning of the handle is adapted to different operating postures, the fixed scraper surface ensures the stability of the operation and the quality of plastering, and the locking effect of each fastening nut and tightening nut ensures that each structure does not loosen under stress. The overall structure works together to achieve efficient, convenient and high-quality wall plastering operations.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model adopts a three-stage nested telescopic structure consisting of a main rod, a first telescopic rod, a second telescopic rod, and a third telescopic rod, which significantly expands the length adjustment range compared to the existing two-stage telescopic design. It can flexibly adjust the extension length of the rods according to different construction scenarios such as high walls and wide walls, completing high-altitude and large-area plastering operations without the need for additional auxiliary tools. Simultaneously, the fastening nuts at the connection points of each telescopic rod are reliably fixed through threaded locking force, effectively preventing relative slippage of the rods during construction, ensuring the stability of the plastering operation, and solving the problems of limited telescopic range and insufficient adaptability to complex scenarios in existing equipment.

[0020] 2. This utility model achieves free adjustment of the handle position through an adjustable component. The sliding sleeve can slide flexibly along the axis of the main rod, allowing the operator to precisely adjust the handle to a comfortable position according to their height, working posture, and working angle, and then lock it in place by tightening the nut. The anti-slip texture on the outer surface of the handle increases hand friction and prevents slipping during operation. This design breaks through the limitations of existing fixed handles, effectively reducing arm fatigue caused by prolonged operation, improving comfort and convenience during construction, and further improving overall work efficiency.

[0021] 3. The scraper surface of this utility model is made of stainless steel with a polytetrafluoroethylene (PTFE) anti-stick coating, which not only has good wear resistance and corrosion resistance, but also significantly reduces mortar adhesion, facilitating post-work cleaning and improving the smoothness of plastering operations. The U-shaped groove structure of the clamping plate enables surface contact clamping and fixing of the scraper surface, making disassembly and replacement convenient. When the scraper surface is worn, deformed, or needs to be replaced with a different size, the operation can be completed without complicated tools, reducing maintenance costs. At the same time, the rectangular flat plate structure and rounded edge treatment of the scraper surface ensure the flatness of the wall plastering and avoid the risk of scratching the wall base or bumping into the operator. Attached Figure Description

[0022] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model in its contracted state; Figure 3 This utility model Figure 2 Enlarged schematic diagram of the structure of region A in the middle; Figure 4 This is a schematic diagram of the connection structure of the adjustment component of this utility model; Figure 5 This is a schematic diagram of the card plate connection structure of this utility model.

[0023] Reference numerals in the attached drawings: 1. Main rod; 2. First telescopic rod; 3. Second telescopic rod; 4. Third telescopic rod; 5. Connecting frame; 51. Clamping plate; 6. Scraper surface; 7. Adjusting component; 71. Sliding sleeve; 72. Tightening nut; 73. Support plate; 74. Handle; 8. Fastening nut. Detailed Implementation

[0024] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0025] like Figures 1-5 As shown, a telescopic hand-held plastering scraper for wall construction provided by this utility model includes a long strip-shaped main rod 1, a first telescopic rod 2 that is slidably inserted into the upper part of the main rod 1 along the axial direction, a second telescopic rod 3 that is slidably inserted into the upper part of the first telescopic rod 2, and a third telescopic rod 4 that is slidably inserted into the upper part of the second telescopic rod 3. Furthermore, the first telescopic rod 2, the second telescopic rod 3, and the third telescopic rod 4 are nested together in sequence to form a rod structure with multi-level adjustable length.

[0026] The top of the third telescopic rod 4 is fixedly connected to a frame-type connecting frame 5. The top of the connecting frame 5 is fixedly connected to a clamping plate 51. The inner side of the clamping plate 51 is clamped to a scraper surface 6 for wall plastering and leveling operations. The scraper surface 6 is rectangular flat and the edges are rounded. The outer surface of the top of the main rod 1 is slidably fitted with an adjustment component 7 for adjusting the position of the handle 74.

[0027] In a further technical solution, the connection between the first telescopic rod 2 and the main rod 1, the connection between the first telescopic rod 2 and the second telescopic rod 3, and the connection between the second telescopic rod 3 and the third telescopic rod 4 are all threaded with fastening nuts 8 for locking.

[0028] The specific technical solution utilizes a three-tiered nested structure of main rod 1, first telescopic rod 2, second telescopic rod 3, and third telescopic rod 4 to achieve length adjustment, adapting to different construction scenarios. Before use, operators can loosen the fastening nuts 8 at the connections between the first telescopic rod 2 and main rod 1, the first telescopic rod 2 and second telescopic rod 3, and the second telescopic rod 3 and third telescopic rod 4, according to the wall height and working range. Axial sliding allows the first telescopic rod 2 to extend or retract relative to the main rod 1, the second telescopic rod 3 relative to the first telescopic rod 2, and the third telescopic rod 4 relative to the second telescopic rod 3, until the desired working length is achieved. After determining the length, the fastening nuts 8 are tightened in the opposite direction, using the threaded locking force of the nuts to firmly secure each telescopic rod to its corresponding body, preventing relative slippage during construction and ensuring the stability of the plastering operation.

[0029] It should be noted that the card plate 51 has a U-shaped groove structure that fits the edge of the scraper surface 6. The back of the scraper surface 6 is closely fitted with the bottom of the groove of the card plate 51 to form a surface contact snap-fit, thereby realizing the detachable fixing of the scraper surface 6 and the card plate 51.

[0030] It should be noted that the scraper surface 6 is made of 304 stainless steel and its outer surface is coated with a polytetrafluoroethylene anti-stick coating.

[0031] More specifically, the installation of the scraper surface 6 relies on the clamping plate 51 at the top of the connecting bracket 5. The clamping plate 51 has a U-shaped groove structure that fits the edge of the scraper surface 6. During installation, the edge of the scraper surface 6 is embedded into the U-shaped groove of the clamping plate 51, so that the back of the scraper surface 6 is tightly fitted with the bottom of the groove of the clamping plate 51, forming a surface contact snap-fit, realizing the detachable fixing of the scraper surface 6 and the clamping plate 51. During operation, the scraper surface 6, as the component that directly contacts the wall mortar, has a rectangular flat plate structure that ensures the smoothness of the plastering, and the rounded edges can avoid scratching the wall base or bumping the operator. The scraper surface 6 is made of 304 stainless steel, with a polytetrafluoroethylene non-stick coating on the outer surface, which can reduce the adhesion of mortar to the surface of the scraper surface 6, making it easy to clean after operation, and improving the smoothness of the plastering operation.

[0032] The adjusting assembly 7 includes an annular sliding sleeve 71 adapted to the outer diameter of the main rod 1. The sliding sleeve 71 can be freely slidably fitted onto the outer surface of the main rod 1 along the axial direction of the main rod 1. A locking nut 72 is threaded through the radial surface of the sliding sleeve 71. The locking nut 72 passes through the side wall of the sliding sleeve 71 radially and can selectively abut against the outer surface of the main rod 1. The relative fixation of the sliding sleeve 71 and the main rod 1 is achieved by tightening force. The outer wall of the sliding sleeve 71 is integrally forged to form a horizontally extending receiving plate 73 in the direction away from the main rod 1. The end of the receiving plate 73 away from the sliding sleeve 71 is integrally bent downward to form a handle 74 that is easy to hold. The outer surface of the handle 74 is provided with anti-slip texture.

[0033] Specifically, the position adjustment of the grip 74 is achieved through the adjustment component 7, which is an integrated structure consisting of a sliding sleeve 71, a tightening nut 72, a receiving plate 73, and the grip 74. The sliding sleeve 71 is adapted to the outer diameter of the main rod 1 and can slide freely along the axial direction of the main rod 1. The operator can push the sliding sleeve 71 to move on the outer surface of the main rod 1 according to their height, working posture, and working angle, thereby driving the receiving plate 73 and the grip 74 to adjust their positions synchronously. When the grip 74 reaches a comfortable gripping position, the radial tightening nut 72 of the sliding sleeve 71 is tightened, so that the end of the nut abuts against the outer surface of the main rod 1. The tightening force achieves relative fixation between the sliding sleeve 71 and the main rod 1, thereby locking the position of the grip 74. The anti-slip texture on the outer surface of the grip 74 increases the friction between the hand and the grip 74, preventing the hand from slipping during operation.

[0034] In summary, during construction, the operator holds the handle 74 and uses the fixed-length main rod 1, first telescopic rod 2, second telescopic rod 3, and third telescopic rod 4 to move the connecting frame 5 and scraper surface 6 close to the wall, applying appropriate pressure to perform plastering and smoothing operations. The length adjustment of the three-stage telescopic rods adapts to different wall heights and widths, the flexible positioning of the handle 74 adapts to different operating postures, the fixed scraper surface 6 ensures operational stability and plastering quality, and the locking effect of each fastening nut 8 and tightening nut 72 ensures that each structure does not loosen under stress. The overall structure works together to achieve efficient, convenient, and high-quality wall plastering operations.

[0035] Working principle: Working principle of length extension adjustment: The length is adjustable through a three-tiered nested structure consisting of main rod 1, first telescopic rod 2, second telescopic rod 3, and third telescopic rod 4, adapting to different construction scenarios. Before use, operators can loosen the fastening nuts 8 at the connections between the first telescopic rod 2 and main rod 1, the first telescopic rod 2 and second telescopic rod 3, and the second telescopic rod 3 and third telescopic rod 4, according to the wall height and working area. Axial sliding allows the first telescopic rod 2 to extend or retract relative to the main rod 1, the second telescopic rod 3 relative to the first telescopic rod 2, and the third telescopic rod 4 relative to the second telescopic rod 3, until the desired working length is achieved. After determining the length, tighten the fastening nuts 8 in the opposite direction. The threaded locking force of the nuts secures each telescopic rod to its corresponding body, preventing relative slippage during construction and ensuring the stability of the plastering operation.

[0036] How the grip position adjustment works: The position adjustment of the grip 74 is achieved through the adjustment component 7, which is an integrated structure consisting of a sliding sleeve 71, a tightening nut 72, a receiving plate 73, and the grip 74. The sliding sleeve 71 is adapted to the outer diameter of the main rod 1 and can slide freely along the axial direction of the main rod 1. The operator can push the sliding sleeve 71 to move on the outer surface of the main rod 1 according to their height, working posture, and working angle, thereby driving the receiving plate 73 and the grip 74 to adjust their positions synchronously. When the grip 74 reaches a comfortable gripping position, the radial tightening nut 72 of the sliding sleeve 71 is tightened, so that the end of the nut abuts against the outer surface of the main rod 1. The tightening force achieves relative fixation between the sliding sleeve 71 and the main rod 1, thereby locking the position of the grip 74. The anti-slip texture on the outer surface of the grip 74 increases the friction between the hand and the grip 74, preventing the hand from slipping during operation.

[0037] Scraper installation and working principle: The installation of the scraper surface 6 relies on the clamping plate 51 at the top of the connecting bracket 5. The clamping plate 51 has a U-shaped groove structure that fits the edge of the scraper surface 6. During installation, the edge of the scraper surface 6 is inserted into the U-shaped groove of the clamping plate 51, so that the back of the scraper surface 6 is tightly fitted with the bottom of the groove of the clamping plate 51, forming a surface contact snap-fit, realizing the detachable fixing of the scraper surface 6 and the clamping plate 51. During operation, the scraper surface 6, as the component that comes into direct contact with the wall mortar, has a rectangular flat plate structure that ensures the smoothness of the plastering, and the rounded edges prevent scratching the wall base or bumping the operator. The scraper surface 6 is made of 304 stainless steel and has a polytetrafluoroethylene non-stick coating on the outer surface, which reduces the adhesion of mortar to the surface of the scraper surface 6, making it easy to clean after operation, and improving the smoothness of the plastering operation.

[0038] Overall collaborative operation principle: During construction, the operator holds the handle 74 and uses the fixed-length main rod 1, first telescopic rod 2, second telescopic rod 3, and third telescopic rod 4 to move the connecting frame 5 and scraper surface 6 close to the wall, applying appropriate pressure to perform plastering and smoothing operations. The length adjustment of the three-stage telescopic rods adapts to different wall heights and widths, the flexible positioning of the handle 74 adapts to different operating postures, the fixed scraper surface 6 ensures operational stability and plastering quality, and the locking action of the fastening nuts 8 and tightening nuts 72 ensures that the structure does not loosen under stress. The overall structure works together to achieve efficient, convenient, and high-quality wall plastering operations.

[0039] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A retractable handheld plastering scraper for wall construction, comprising a long strip-shaped main rod (1), characterized in that, A first telescopic rod (2) is slidably inserted into the upper part of the main rod (1) along the axial direction, a second telescopic rod (3) is slidably inserted into the upper part of the first telescopic rod (2), and a third telescopic rod (4) is slidably inserted into the upper part of the second telescopic rod (3). The top end of the third telescopic rod (4) is fixedly connected to a connecting frame (5) with a frame structure. The top end of the connecting frame (5) is fixedly connected to a clamping plate (51). The inner side of the clamping plate (51) is clamped to a scraper surface (6) for wall plastering and leveling. The scraper surface (6) is rectangular and flat with rounded edges. The outer surface of the top end of the main rod (1) is slidably fitted with an adjustment component (7) for adjusting the position of the handle (74).

2. The retractable handheld plastering scraper for wall construction as described in claim 1, characterized in that, The adjustment assembly (7) includes an annular sliding sleeve (71) adapted to the outer diameter of the main rod (1). The sliding sleeve (71) can be freely slidably fitted onto the outer surface of the main rod (1) along the axial direction. A locking nut (72) is threaded through the radial surface of the sliding sleeve (71). The locking nut (72) passes through the side wall of the sliding sleeve (71) radially and can selectively abut against the outer surface of the main rod (1). The relative fixation of the sliding sleeve (71) and the main rod (1) is achieved by tightening force. The outer wall of the sliding sleeve (71) is integrally forged in the direction away from the main rod (1) to form a horizontally extending support plate (73). The end of the support plate (73) away from the sliding sleeve (71) is integrally bent downward to form a handle (74) that is easy to hold. The outer surface of the handle (74) is provided with anti-slip texture.

3. The retractable handheld plastering scraper for wall construction as described in claim 1, characterized in that, The scraper surface (6) is made of 304 stainless steel and its outer surface is coated with a polytetrafluoroethylene anti-stick coating.

4. The retractable handheld plastering scraper for wall construction as described in claim 1, characterized in that, The first telescopic rod (2), the second telescopic rod (3), and the third telescopic rod (4) are nested together to form a rod structure with adjustable length in multiple stages.

5. The retractable handheld plastering scraper for wall construction as described in claim 1, characterized in that, The connection between the first telescopic rod (2) and the main rod (1), the connection between the first telescopic rod (2) and the second telescopic rod (3), and the connection between the second telescopic rod (3) and the third telescopic rod (4) are all threaded with fastening nuts (8) for locking.

6. The retractable handheld plastering scraper for wall construction as described in claim 1, characterized in that, The card plate (51) has a U-shaped groove structure that is adapted to the edge of the scraper surface (6). The back of the scraper surface (6) is closely fitted with the bottom of the groove of the card plate (51) to form a surface contact snap-fit, thereby realizing the detachable fixing of the scraper surface (6) and the card plate (51).

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