A roller structure for a paint brush and a paint brush

Abstract

The utility model discloses a kind of roller structure and paint brush of paint brush, roller structure includes shell and inner core, the inner core is placed in the inside of shell;The shell is hollow cylinder, the first end of the shell is equipped with first fixed part, the first fixed part is circular truncated cone body, the second end of the shell is equipped with second fixed part, the end of the second fixed part is horn-shaped end portion;The length of the shell is not less than four fifths of the brush part of paint brush;The inner core is hollow cylinder, slot portion is set on the circumference of the shell, the inner core passes from the slot portion, is contained in the inside of shell.A kind of roller structure of paint brush, is plastic material, by "lengthening design+guiding design+fastening connection+elastic slotting" realizes key effect: structural stability, assembly convenience, connection stability and structural durability.

Description

Technical Field

[0001] This utility model belongs to the technical field of decoration tools, and relates to a roller structure for a paint brush and a paint brush. Background Technology

[0002] As a core tool in the fields of architectural decoration and industrial coating, the rolling stability of paint rollers directly determines coating efficiency and coating quality. However, current mainstream products still suffer from the following technical defects, which seriously restrict user experience and industry development: In actual coating processes, when the roller is subjected to friction from the wall surface, the gap between the mandrel and the sleeve causes the roller to wobble radially, resulting in uneven coating thickness. Repeated touch-ups are required to achieve the desired thickness, which not only reduces construction efficiency but also increases paint waste.

[0003] Current industry improvements addressing rolling instability primarily focus on surface optimizations such as "adding anti-slip texture to the handle" and "adding counterweights," failing to address core issues like spindle fit precision and roller balance performance, and still not eliminating radial wobble caused by fit clearances. Therefore, a systematic solution from a structural design perspective is urgently needed. Utility Model Content

[0004] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, a roller structure for a paint brush includes a housing and an inner core, the inner core being disposed inside the housing; The outer shell is a hollow cylinder. The first end of the outer shell is provided with a first fixing part, which is a frustum. The second end of the outer shell is provided with a second fixing part, which is a flared end. The length of the outer shell is not less than four-fifths of the brush part of the paint brush. The inner core is a hollow cylinder, and a slot is provided on the circumferential surface of the outer shell. The inner core passes through the slot and is housed inside the outer shell. The first fixing part and the second fixing part are respectively interference-fitted with the brush part of the paint brush, and the inner core is interference-fitted with the handle part of the paint brush. The handle part of the paint brush passes through the outer shell from the second end, passes through the inner core, and extends out from the first end.

[0005] As a further embodiment of this utility model: a plurality of first annular protrusions are provided on the circumference of the first fixing part.

[0006] As a further embodiment of this invention, the first annular boss has at least two protrusions.

[0007] As a further embodiment of this utility model: the body of the second fixing part is a hollow cylinder; the circumference of the body part is provided with a plurality of second annular bosses and a plurality of oblique tooth bosses, and along the axial direction of the body part, the plurality of oblique tooth bosses are disposed between the second annular bosses and between the second annular bosses and the trumpet-shaped end.

[0008] As a further embodiment of this utility model: along the radial direction of the main body, a plurality of rows of the oblique tooth bosses are equally spaced.

[0009] As a further embodiment of this utility model: the slotted portion is symmetrical along the rotation axis of the outer shell, the slotted portion includes a large slot and a small slot, the small slot is disposed at both ends of the large slot in the axial direction, and the connecting edge between the large slot and the small slot, the connecting edge between the small slot and the first fixing part, and the connecting edge between the small slot and the second fixing part all adopt a bevel transition.

[0010] As a further embodiment of this utility model: the inner core is a dumbbell-shaped hollow body, with the diameter of the middle part being smaller than the diameters of the two ends, and an I-shaped groove is formed on the circumferential surface of the middle part.

[0011] As a further embodiment of this utility model: two slotted portions are provided, and the two slotted portions are symmetrically arranged; a connecting strip is provided in the center of one of the slotted portions, and the connecting strip connects the two sides of the slotted portion.

[0012] As a further embodiment of this utility model, both the outer shell and the inner core are made of plastic.

[0013] In a second aspect, a paintbrush includes a brush component, a handle component, and a roller structure of the paintbrush as described in any of the above, wherein the brush component is fitted around the outer periphery of the roller structure, and the handle component is inserted into the inner hole of the roller structure.

[0014] The beneficial effects of this utility model are: A paintbrush roller structure, made of plastic, achieves its extended design through "extended design + guide design + fastening connection + flexible slotting": the overall length of the roller structure is no less than four-fifths of the brush component length. The closer the length of the roller structure is to the length of the brush component, the stronger the structural stability and the better the roller's balance performance. Assembly convenience: the guide structure with a frustum shape and flared end, combined with flexible slotting, allows for quick and tool-free assembly of the brush component, handle, and inner core, lowering the operational threshold. Connection stability: the interference fit design between the roller structure and the brush component solves the problems of paintbrush barrel loosening and handle wobbling during use. Structural durability: the rebound characteristics of the slotting protect the components from deformation, extending the overall structure's service life. This paintbrush roller structure, assembled with the brush component and handle, significantly reduces bounce during use, making the painting process smoother. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the roller structure of a paint brush; Figure 2 This is a schematic diagram of the overall structure of the outer shell of a paint brush roller. Figure 3 This is a side view of the outer casing of a paint brush roller structure; Figure 4 yes Figure 3 Schematic diagram of section AA; Figure 5 This is a schematic diagram of the overall structure of the inner core of a paint brush roller. Figure 6 This is a schematic diagram of another overall structure of the inner core of a paint brush roller structure; Figure 7 This is a top view of the inner core of a paint brush roller structure. Figure 8 yes Figure 7 Schematic diagram of the BB section; Figure 9 This is a structural diagram of a paint brush; As shown in the figure: 1-Outer shell, 11-First fixing part, 111-First annular boss, 12-Second fixing part, 121-Second annular boss, 122-Helical tooth boss, 13-Slotted part, 131-Large slotted part, 132-Small slotted part, 133-Beveled edge; 2-Inner core, 21-I-shaped groove, 22-Connecting strip.

[0016] A - Brush component, B - Handle component, C - Roller structure. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. It should be understood that this application is not limited to the exemplary embodiments disclosed herein. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0018] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "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 utility model 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 utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Example

[0021] like Figure 1-6As shown, a roller structure for a paintbrush includes a shell 1 and an inner core 2, with the inner core 2 placed inside the shell 1. The shell 1 is a hollow cylinder, with a first fixing part 11 at its first end, which is a frustum, and a second fixing part 12 at its second end, which is a flared end. The length of the shell 1 is not less than four-fifths of the brush part A of the paintbrush. The inner core 2 is a hollow cylinder, with a slot 13 on the circumferential surface of the shell 1 through which the inner core 2 passes and is housed inside the shell 1. The first fixing part 11 and the second fixing part 12 are respectively press-fitted with the brush part A of the paintbrush, and the inner core 2 is press-fitted with the handle part B of the paintbrush. The handle part B of the paintbrush enters the shell 1 from the second end, passes through the inner core 2, and extends out from the first end.

[0022] The paint brush roller structure C comprises two main components: an outer shell 1 and an inner core 2. The inner core 2 is fitted inside the outer shell 1 through a slotted portion 13, forming an integral structure. This structure connects the brush part A and the handle part B of the paint brush. Brush component A: A brush barrel with bristles or leather, fitted onto the outside of the outer casing 1.

[0023] Handle component B: A "7" shaped iron rod, inserted into the inner core 2 and fixed to the inner core 2.

[0024] A paintbrush roller structure, made of plastic, achieves key effects through "extended design + guide design + fastening connection + flexible grooving": Extended design: The overall length of roller structure A is not less than four-fifths of the length of brush component A. The closer the length of roller structure C is to the length of brush component A, the stronger the structural stability and the better the roller balance performance. Easy assembly: The guide structure with a frustum shape and flared end, combined with flexible grooving, allows for quick and tool-free assembly of brush component A, handle component B, and inner core 2, lowering the operational threshold. Connection stability: The interference fit design between the roller structure and brush component A solves the problems of paintbrush barrel loosening and handle wobbling during use. Structural durability: The rebound characteristics of the grooving protect the components from deformation and extend the service life of the overall structure. A paintbrush roller structure C, assembled with brush component A and handle component B, forms a paintbrush. After assembly, it significantly reduces bounce during use, making the painting process smoother.

[0025] like Figure 1-4 As shown, in this embodiment, the structural details of the outer shell 1 are as follows: The first fixed part 11 has a plurality of first annular protrusions 111 on its circumference; there are at least two first annular protrusions 111. The main body of the second fixing part 12 is a hollow cylinder; the circumference of the main body is provided with a plurality of second annular bosses 121 and a plurality of oblique tooth bosses 122. Along the axial direction of the main body, the plurality of oblique tooth bosses 122 are disposed between the second annular bosses 121 and between the second annular bosses 121 and the flared end. The slotted portion 13 is symmetrical about the rotation axis of the outer shell 1. The slotted portion 13 includes a large slot 131 and a small slot 132. The small slot 132 is disposed at both ends of the large slot 131 in the axial direction. The connecting edge between the large slot 131 and the small slot 132, the connecting edge between the small slot 132 and the first fixing part 11, and the connecting edge between the small slot 132 and the second fixing part 12 are all transitioned by a bevel 133.

[0026] Its functions are as follows: First end: A first fixing part 11 of a frustum body is provided. The frustum body has an oblique arc for guiding the insertion of the brush component A, which facilitates assembly. At least two first annular protrusions 111 are provided on the circumference of the frustum body, which play a role in threaded fastening and stabilization, enhance the interference fit between the outer shell 1 and the brush component A, and solve the problems of brush component A loosening and handle shaking during use.

[0027] The second end portion: A second fixing part 12 is provided, consisting of a "body portion" and a "flared end portion". The flared end portion guides the insertion of the handle component B, improving assembly convenience. The body portion has several second annular bosses 121 around its circumference; several helical toothed bosses 122 are axially connected between the body portion and the flared end portion, and the helical toothed bosses 122 are arranged in several rows at equal intervals along the radial direction of the body portion; both the second annular bosses 121 and the helical toothed bosses 122 serve a threaded fastening and stabilizing function, strengthening the interference fit between the outer shell 1 and the brush component A. Since the brush component A needs to be replaced during use, and the roller structure C needs to be recycled, the roller structure C will be installed with new brush components A multiple times, resulting in wear and tear. The reinforced design of the bosses improves the wear resistance of key connection parts, extending the service life of the roller structure C.

[0028] The slotted portion 13 is symmetrical about the rotation axis of the outer shell 1 and consists of a large slot 131 and a small slot 132. The small slot 132 is distributed at both ends of the axial direction of the large slot 131. The connecting edges between the large slot 131 and the small slot 132, and between the small slot 132 and the first / second fixing portion 12, are all transitioned by a bevel 133. This facilitates the insertion of the inner core 2, and the slotted portion 13 has a springback reset capability to ensure the stability of the inner core 2 after assembly.

[0029] like Figure 5-8 As shown, in this embodiment, the inner core 2 has the following structural details: The inner core 2 is a hollow cylinder that is interference-fitted with the handle component B. In one embodiment, the inner core 2 is a dumbbell-shaped hollow body with a diameter in the middle that is smaller than the diameter at both ends. An I-shaped groove 21 is provided on the circumferential surface of the middle part. There are two grooves, which are symmetrically arranged. A connecting strip is provided in the center of one of the grooves, and the connecting strip connects the two sides of the groove.

[0030] Its functions are as follows: I-shaped groove 21: It is opened on the circumferential surface of the inner core 2 and has the same function as the slot 13 of the outer shell 1. It facilitates the assembly of the inner core 2 and has the ability to spring back and reset, ensuring the stability of the shape after assembly.

[0031] Connecting strip 22: Connected in the middle of one of the I-shaped grooves to improve the overall structural stability. Example

[0032] like Figure 9 As shown, a paintbrush includes a brush component A, a handle component B, and a roller structure of the paintbrush described above. The brush component A is fitted around the outer periphery of the roller structure C, and the handle component B is inserted into the inner hole of the roller structure C. Brush component A: Figure 7 For partial cross-section illustration, the first fixing part 11, guided by its frustum shape, is fitted onto the outside of the outer casing 1, and is interference-fitted with the first and second fixing parts 12. The handle part B: guided by the flared end of the second fixing part 12, it passes through the second end of the outer casing 1, through the inner core 2, and extends from the first end, interference-fitting with the inner core 2. Specific effects include the effect of the paint brush roller structure, which will not be elaborated here.

[0033] It should also be noted that, in this document, relational terms such as "first" and "second" are used only 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.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A roller structure for a paint brush, characterized in that, It includes an outer shell and an inner core, wherein the inner core is located inside the outer shell; The outer shell is a hollow cylinder. The first end of the outer shell is provided with a first fixing part, which is a frustum. The second end of the outer shell is provided with a second fixing part, which is a flared end. The length of the outer shell is not less than four-fifths of the brush part of the paint brush. The inner core is a hollow cylinder, and a slot is provided on the circumferential surface of the outer shell. The inner core passes through the slot and is housed inside the outer shell. The first fixing part and the second fixing part are respectively interference-fitted with the brush part of the paint brush, and the inner core is interference-fitted with the handle part of the paint brush. The handle part of the paint brush passes through the outer shell from the second end, passes through the inner core, and extends out from the first end.

2. The roller structure of the paint brush according to claim 1, characterized in that, The first fixing part has a plurality of first annular protrusions on its circumference.

3. The roller structure of the paint brush according to claim 2, characterized in that, The first annular boss has at least two protrusions.

4. The roller structure of the paint brush according to claim 1, characterized in that, The main body of the second fixing part is a hollow cylinder; the circumference of the main body is provided with a plurality of second annular bosses and a plurality of helical tooth bosses, and along the axial direction of the main body, the plurality of helical tooth bosses are disposed between the second annular bosses and between the second annular bosses and the trumpet-shaped end.

5. The roller structure of the paint brush according to claim 4, characterized in that, Along the radial direction of the main body, several rows of oblique tooth bosses are evenly spaced.

6. The roller structure of the paint brush according to claim 1, characterized in that, The slotted portion is symmetrical along the rotation axis of the outer shell. The slotted portion includes a large slot and a small slot. The small slot is located at both ends of the large slot in the axial direction. The connecting edge between the large slot and the small slot, the connecting edge between the small slot and the first fixing part, and the connecting edge between the small slot and the second fixing part all adopt a bevel transition.

7. The roller structure of the paint brush according to claim 1, characterized in that, The inner core is a dumbbell-shaped hollow body with a diameter in the middle that is smaller than the diameters at both ends, and an I-shaped groove is formed on the circumferential surface of the middle part.

8. The roller structure of the paint brush according to claim 7, characterized in that, The slotted portion is provided in two symmetrical arrangements; a connecting strip is provided in the center of one of the slotted portions, and the connecting strip connects the two sides of the slotted portion.

9. The roller structure of the paint brush according to claim 1, characterized in that, Both the outer shell and the inner core are made of plastic.

10. A paint brush, characterized in that, The roller structure includes a brush component, a handle component, and a paint brush as described in any one of claims 1-9, wherein the brush component is fitted around the outer periphery of the roller structure, and the handle component is inserted into the inner hole of the roller structure.

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