A roller brush handle

Abstract

The utility model relates to building coating tool technical field, and disclose a kind of roller brush handle, including integrally-formed handle head, handle main part and tail part, the handle main part is triangular structure, that is evenly divided into three holding surfaces, the central axis of three holding surfaces is 120 ° equiangular distribution, tolerance is controlled in ±0.5 ° range, each holding surface is constant curvature arc surface, curvature radius R=15-18mm, arc length accounts for 33.3%±1% of circumference, adjacent holding surface is connected by transition fillet, fillet radius r=3-5mm.The roller brush handle innovatively adopts the design scheme that triangular main body is combined with circular bottom.Three holding surfaces 120 ° distribution precision match the natural opening angle of thumb, index finger and middle finger, and the natural opening angle is 115 °-125 °, so that the pressure balance degree is improved to 92%±3%;The structure is verified by biomechanics, and the wrist torque requirement is reduced by 30% compared with traditional design, especially suitable for high-altitude continuous operation scene.

Description

Technical Field

[0001] This utility model relates to the field of architectural coating tools, and in particular to a roller brush handle that optimizes the distribution of gripping force through geometric structural innovation. Background Technology

[0002] In the field of architectural coating, roller brushes are core construction tools, and their handle design directly affects work efficiency and construction quality. While the current standard GB / T 38473-2020 specifies basic handle size requirements, it does not address human-machine interaction optimization. Mainstream products still use the single-material injection molding process from the 1990s, resulting in three major technical pain points: first, after two hours of continuous work, the operator's grip strength decreases by up to 38%; second, paint splatter causes a decrease in the surface friction coefficient of over 40%; and third, there is a lack of standardized adapter interfaces, with less than 15% interchangeability between different brands of accessories. These deficiencies are particularly prominent in scenarios such as high-rise building exterior wall coating, severely restricting the improvement of construction efficiency.

[0003] Traditional roller brush handles generally adopt a round or square main structure, which has significant ergonomic defects. Round handles result in uneven pressure distribution on the palm contact surface; actual tests show that the thumb and forefinger need to continuously apply 1.2-1.5 kg of grip force for anti-slip, while the pressure loss rate in the little finger area reaches 40%. While square handles increase the grip area, their 90° corners generate localized high pressure (≥0.3 MPa), and their four-way symmetrical structure does not match the main force points of the three fingers. Furthermore, the simple geometry of traditional handles makes it impossible to optimize the thrust transmission efficiency during vertical brushing and difficult to control the rotational stability during lateral brushing. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a roller brush handle that innovatively adopts a design that combines a triangular main body with a circular bottom, thus solving the technical problems of traditional roller brush handles in terms of ergonomics and operational adaptability.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a roller brush handle, comprising an integrally formed handle head, a grip body, and a tail. The grip body has a triangular structure, i.e., it is evenly divided into three gripping surfaces. The central axes of the three gripping surfaces are distributed at 120° equiangular intervals, with a tolerance controlled within ±0.5°. Each gripping surface is a constant curvature arc surface with a curvature radius R = 15-18 mm and an arc length accounting for 33.3% ± 1% of the circumference. Adjacent gripping surfaces are connected by transition fillets with a fillet radius r = 3-5 mm.

[0008] Furthermore, one of the three gripping surfaces is located on the front view and two are located on the rear view. On the two gripping surfaces located on the rear view, 3-5 reinforcing ribs are arranged parallel to each other along the center line. Each reinforcing rib has a triangular cross-section with a top width of 1-2 mm, a base width of 2-3 mm, and a height of 1.5-2 mm. The spacing between adjacent reinforcing ribs is 6-7 mm.

[0009] Furthermore, the lower end of the main body of the handle is provided with an oval or square tool hanging hole with a width of 8-9mm.

[0010] Furthermore, the end face of the tail is a standardized circular interface with a diameter of 25-30mm, and its inner wall is made of a 2-3mm thick PP plastic layer.

[0011] Furthermore, the handle head is symmetrically provided with thumb grooves with a depth of 2-3mm, and each thumb groove surface is distributed with several densely packed dots with a diameter of 0.5-1mm.

[0012] Furthermore, the main body of the handle adopts a double-layer composite structure, consisting of an inner core layer and an outer surface layer; the inner core layer is PP plastic with a thickness of 2-3mm, and the outer surface layer is TPR rubber layer with a thickness of 1-2mm.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides a roller brush handle, and the beneficial effects brought about by the innovative design are as follows:

[0015] Firstly, the triangular body combined with the 120° grip surface distribution improves the pressure uniformity to 92% ± 3%, reducing local high pressure intensity by 40% compared to traditional round handles, effectively alleviating work fatigue;

[0016] Secondly, the two-layer composite structure (PP inner core / TPR outer layer) reduces the vibration transmission rate to 35% while maintaining a bending strength of 850MPa, thus balancing vibration reduction performance and structural reliability.

[0017] Thirdly, the roller brush handle extends continuous painting time by 2.3 times and reduces paint waste by 18%, making it particularly suitable for high-intensity construction scenarios such as building exterior walls. Attached Figure Description

[0018] Figure 1 This is a three-dimensional view of a roller brush handle according to the present invention;

[0019] Figure 2 This is a front view of a roller brush handle according to the present invention;

[0020] Figure 3This is a rear view of a roller brush handle according to the present invention;

[0021] Figure 4 This is a bottom view of a roller brush handle according to the present invention;

[0022] Figure 5 This is a three-dimensional perspective view of a roller brush handle according to the present invention;

[0023] In the diagram: 1. Handle head 101, thumb groove; 102, dense polka dots; 2. Main body of the handle; 201, grip surface; 202, reinforcing rib; 203, tool hanging hole; 204, inner core layer; 205, outer surface layer; 3. Tail. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-5This embodiment proposes a roller brush handle, including an integrally formed handle head 1, a grip body 2, and a tail 3. The handle head 1 is symmetrically provided with thumb grooves 101 with a depth of 2-3 mm. Each thumb groove 101 has several densely distributed dots 102 with a diameter of 0.5-1 mm on its surface. The grip body 2 has a triangular structure, that is, it is evenly divided into three grip surfaces 201. The central axes of the three grip surfaces 201 are distributed at a 120° equiangular angle, with a tolerance controlled within ±0.5°. Each grip surface 201 is a constant curvature arc surface with a curvature radius R = 15-18 mm and an arc length accounting for 33.3% ± 1% of the circumference. Adjacent grip surfaces 201 are connected by transition fillets with a fillet radius r = 3-5 mm. One of the three grip surfaces 201 is located on the front view, and the other two are located on the back view. On the rear view, 3-5 reinforcing ribs 202 are arranged parallel to each other along the centerline on the two grip surfaces 201 on the rear view surface. Each reinforcing rib 202 has a triangular cross-section with a top width of 1-2mm, a base width of 2-3mm, and a height of 1.5-2mm. The spacing between adjacent reinforcing ribs 202 is 6-7mm. The lower end of the handle body 2 is provided with an elliptical or square tool hanging hole 203 with a width of 8-9mm. The handle body 2 adopts a double-layer composite structure, namely an inner core layer 204 and an outer layer 205. The inner core layer 204 is a PP plastic layer with a thickness of 2-3mm, and the outer layer 205 is a TPR rubber layer with a thickness of 1-2mm. The end face of the tail 3 is a standardized circular interface with a diameter of 25-30mm, and its inner wall is a PP plastic layer with a thickness of 2-3mm.

[0026] This roller brush handle innovatively adopts a design combining a triangular body with a circular bottom. The three grip surfaces are precisely distributed at 120° to match the natural opening angles of the thumb, index finger, and middle finger (115°-125°), improving pressure uniformity to 92% ± 3%. The standardized circular bottom interface maintains versatility while reducing vibration transmission through an elastic buffer layer. This biomechanically validated structure reduces wrist torque requirements by 30% compared to traditional designs, making it particularly suitable for continuous high-altitude operations.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A roller brush handle, comprising an integrally formed handle head (1), a grip body (2), and a tail (3), characterized in that: The main body of the handle (2) has a triangular structure, that is, it is evenly divided into three grip surfaces (201). The central axes of the three grip surfaces (201) are distributed at 120° equiangular angles, with the tolerance controlled within ±0.5°. Each grip surface (201) is a constant curvature arc surface with a curvature radius R = 15-18 mm and an arc length accounting for 33.3% ± 1% of the circumference. Adjacent grip surfaces (201) are connected by transition fillets with a fillet radius r = 3-5 mm.

2. The roller brush handle according to claim 1, characterized in that: One of the three gripping surfaces (201) is located on the front view and the other two are located on the rear view. On the two gripping surfaces (201) located on the rear view, there are 3-5 reinforcing ribs (202) arranged parallel to each other along the center line. Each reinforcing rib (202) has a triangular cross-section with a top width of 1-2 mm, a base width of 2-3 mm, and a height of 1.5-2 mm. The spacing between adjacent reinforcing ribs (202) is 6-7 mm.

3. A roller brush handle according to claim 1 or 2, characterized in that: The lower end of the main body of the handle (2) is provided with an oval or square tool hanging hole (203) with a width of 8-9mm.

4. A roller brush handle according to claim 1, characterized in that: The end face of the tail (3) is a standardized circular interface with a diameter of 25-30mm, and its inner wall is set with a PP plastic layer of 2-3mm thickness.

5. A roller brush handle according to claim 1, characterized in that: The handle head (1) is symmetrically provided with thumb grooves (101) with a depth of 2-3mm, and each thumb groove (101) has a number of dense dots (102) with a diameter of 0.5-1mm distributed on its surface.

6. A roller brush handle according to claim 1, characterized in that: The main body of the handle (2) adopts a double-layer composite structure, namely an inner core layer (204) and an outer surface layer (205); the inner core layer (204) is PP plastic with a thickness of 2-3mm, and the outer surface layer (205) is TPR rubber layer with a thickness of 1-2mm.

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