Substrate Cleaning Brush Holder Geometry for Even Contact Pressure
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Solution Overview
Problem
The existing substrate cleaning brush design results in excessive elastic deformation of the small diameter part, leading to uneven contact pressure and inadequate cleaning of the substrate surface.
Innovation Solution
The substrate cleaning brush is designed with a brush holder and brush body, where the holder has a longer holder opening to restrict the elastic deformation of the cleaning part, ensuring even contact pressure and effective cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the protruding length of the small diameter part is increased to improve cleaning effect, then the cleaning effect is enhanced, but the elastic deformation becomes excessive causing uneven contact pressure
Solution Approach 1:
The patent changes the geometric parameters of the brush holder, specifically the holder opening dimensions (inner diameter and length), to control the elastic deformation of the cleaning part. By setting the inner diameter to 0.6-0.8 times the outer diameter of the cleaning part and the length to 0.1-0.3 times the protruding length, the contact pressure uniformity is improved while maintaining cleaning effectiveness
Solution Approach 2:
The patent applies different structural characteristics to different parts of the brush holder. The holder opening has specific dimensional ratios that differ from other parts, creating localized constraints that control deformation in the cleaning part while maintaining overall structural integrity and cleaning performance
2Manufacturing precision
If the length of the holder opening is increased to restrict elastic deformation, then contact pressure uniformity is improved, but the protruding length available for cleaning is reduced
Solution Approach 1:
The patent optimizes the holder opening length parameter to be 0.1-0.3 times the protruding length of the cleaning part. This parameter change restricts excessive elastic deformation to ensure uniform contact pressure while preserving sufficient protruding length for effective cleaning operation
3Manufacturing precision
If the inner diameter of the holder opening is decreased to restrict deformation, then contact pressure uniformity is improved, but the ease of assembly is reduced
Solution Approach 1:
The patent sets the inner diameter of the holder opening to 0.6-0.8 times the outer diameter of the cleaning part. This parameter change provides sufficient constraint to ensure uniform contact pressure while maintaining ease of assembly by allowing the cleaning part to pass through the holder opening during the assembly process
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
This design allows for even cleaning of the entire substrate surface by minimizing the length of the cleaning part that can be elastically deformed, thereby maintaining effective cleaning performance.
Implementation Method 1
the soft small diameter part is elastically deformed in the radial direction in such a way as to slope relative to the rotation axis (vertical axis)
Implementation Method 2
the top-to-bottom length of the holder opening is longer than or equal to 1/4 of a protruding length of the cleaning part... thus, the length of the cleaning part in the up-down direction that can be elastically deformed is minimized
Data Source
AI summary
In a holder attached state in which a holder upper part 11 is attached to a brush rotation shaft 2, the lower surface of the holder upper part 11 and the inner peripheral surface of a holder lower part 18 define a brush accommodating space 23, and the inner peripheral edge of a holder bottom plate part 19 defines a circular holder opening 24 having a smaller diameter than the inner diameter of the holder lower part 18. A held part 31 of a brush body 30 is in a circular column shape incapable of penetrating through the holder opening 24, and is accommodated and held in the brush accommodating space 23. A cleaning part 32 of the brush body 30 is in a circular column shape smaller in diameter than the held part 31 and capable of penetrating through the holder opening 24, and penetrates through the holder opening 24 and projects downward. A top-to-bottom length L2 of the holder opening 24 of the brush holder 10 is longer than or equal to ¼ of a protruding length L1 of the cleaning part 32 of the brush body 30 from the held part 31 thereof and shorter than the protruding length L1 of the cleaning part 32.