Paint Roller Modular Assembly Friction Fit
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Solution Overview
Problem
The production of existing paint rollers is complex due to the requirement for intricate injection molding tools, making them difficult and costly to manufacture and assemble.
Innovation Solution
A paint roller design featuring identical end pieces and connecting tubes produced using simple injection molding and extrusion, respectively, with clamping sleeves held in place through frictional forces, allowing for easy assembly and cost-effective mass production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex injection molds are used to manufacture end pieces and connecting pipes, then the structural integrity and functionality of the paint roller is improved, but the manufacturing complexity and cost increase significantly
Solution Approach 1:
The paint roller is divided into separate modular components (end pieces, connecting pipe, clamping sleeve, roller body) that can be manufactured independently using simple molds and then assembled together. This segmentation allows each component to be produced with simple injection molds rather than requiring complex integrated molds, thereby reducing mold complexity while maintaining structural integrity through proper assembly design
Solution Approach 2:
The clamping sleeve is nested within the connecting pipe, and the connecting pipe is inserted into the roller body. This nested arrangement allows multiple functional elements to be combined in a compact structure that can be manufactured with simple molds for each component, reducing overall manufacturing complexity while maintaining the reliability of the assembled structure
2Adaptability or versatility
If multiple parts and complex assembly steps are used, then the functionality and adaptability of the paint roller is improved, but the assembly time and production cost increase
Solution Approach 1:
The clamping sleeve is designed with a friction fit that automatically secures the connecting pipe in place during assembly, eliminating the need for additional fastening operations. The interlocking geometry of the components allows them to self-align and self-secure through friction forces, enabling rapid assembly without complex fastening procedures while maintaining functional adaptability
Solution Approach 2:
Multiple functional elements are merged into integrated components - the clamping sleeve combines the functions of connection and retention, while the connecting pipe integrates structural support with the end pieces. This merging reduces the number of separate assembly steps and fastening operations, thereby increasing assembly speed while preserving functional versatility
3Reliability
If traditional multi-part designs are used, then the reliability of the connection is improved, but the manufacturing cost and complexity increase
Solution Approach 1:
The connection reliability is achieved through optimized dimensional parameters - the outer diameter of the connecting pipe is precisely sized to create an optimal friction fit within the clamping sleeve. By carefully selecting the dimensional parameters of the interface surfaces, the design achieves reliable connections through simple friction-based retention rather than requiring complex multi-part fastening mechanisms, thereby improving ease of manufacture while maintaining connection reliability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design simplifies the production and assembly of paint rollers, enabling cost-effective manufacturing and easy replacement of components, while maintaining a secure and functional product.
Implementation Method 1
clamping sleeves held in place through frictional forces
Implementation Method 2
stop surface formed on an inner side of the pipe section at a predetermined axial distance from the first support surface to limit the insertion depth of one end of the connecting pipe
Data Source
Figure 1
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AI summary
The invention relates to a paint roller with a holding bracket (1) at one end of which a handle (2) is provided and a straight section (3) bounded by the other end on which a cylindrical roller body (4) is rotatably held, wherein an end piece (5) is inserted into each open end of the roller body (4), wherein each end piece (5) has a central opening (6) for the passage of the straight section (3) of the holding bracket (1), wherein a pipe section (7) extends axially from each end piece (5) to the interior of the roller body (4), wherein the pipe sections (7) of both end pieces (5) are connected by means of a connecting pipe (9), wherein the pipe section (7) has a first section (A1) with a first inner diameter (I1) and a second section (A2) with a second inner diameter (I2) which is larger than the first inner diameter (I1).and has a first support surface (S1) for axially supporting a clamping sleeve (8).