Spray Gun Cup Cover Structure for Clean Twisting Assembly
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Solution Overview
Problem
Existing fluid supply cups for paint spray guns have a large overall structure, high mass, and complex mold fabrication, leading to increased production costs and difficulty in cleaning due to concave portions on the lid, which can cause paint overflow and require extensive cleaning agents, and result in unsightly stains on the spraying surface.
Innovation Solution
A cup lid design featuring fin-shaped protrusions or recesses on the side wall, with twisting components or areas for easy connection and disconnection, reducing the mass and simplifying mold fabrication, while facilitating quick and thorough cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If concave portions are arranged on the circumference surface of the dome to facilitate gripping and twisting, then ease of operation is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The lid is divided into a smooth dome portion and a separate twisting portion with gripping structures. The twisting portion includes circumferential ridges that provide finger grip points, while the dome remains smooth for easy cleaning. This segmentation allows each part to have optimized features without compromising the other.
Solution Approach 2:
The gripping structures are extracted as distinct circumferential ridges on the twisting portion, separated from the dome surface. This extraction allows the dome to remain smooth and cleanable while providing dedicated gripping zones on the twisting portion for easy operation.
2Ease of operation
If a dome-type protrusion is adopted to increase lid height, then ease of operation is improved, but the overall height becomes too high causing deformation and paint overflow
Solution Approach 1:
The lid structure uses local quality differentiation where the twisting portion has circumferential ridges for gripping, while the dome portion maintains a moderate height with reinforcement ribs for structural stability. This localized optimization prevents overall height increase while providing adequate grip points.
Solution Approach 2:
Reinforcement ribs are added to the dome portion to preemptively strengthen the structure before assembly. This beforehand cushioning prevents deformation during the assembly process when the spray gun is pressed down, eliminating paint overflow risks.
3Ease of operation
If concave portions are arranged on the dome surface, then ease of operation is improved, but cleaning difficulty increases and appearance becomes unattractive
Solution Approach 1:
The lid is segmented into a smooth dome portion for easy cleaning and a separate twisting portion with circumferential ridges for gripping. This segmentation ensures the dome surface remains smooth and cleanable while providing adequate grip points on the twisting portion.
Solution Approach 2:
The gripping structures are extracted as circumferential ridges on the twisting portion, away from the dome surface. This extraction preserves the smooth appearance and cleanability of the dome while providing functional gripping zones elsewhere on the lid.
4Ease of operation
If distinctive structures with concave portions are added to the lid, then ease of operation is improved, but mold fabrication difficulty and cost increase
Solution Approach 1:
The lid structure segments the smooth dome portion from the twisting portion with circumferential ridges. This segmentation allows the dome to be molded as a simple smooth surface while the twisting portion incorporates functional ridges, balancing ease of operation with manufacturability.
Solution Approach 2:
Complex gripping structures are localized only to the twisting portion where needed, while the dome portion maintains simple smooth surfaces. This local quality approach provides functional features only where necessary, minimizing overall mold complexity and fabrication cost.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A fluid supply cup and a cup cover thereof. The cup cover comprises a cover body (1); a tubular connecting portion (2) is provided at the top of the cover body (1); the tubular connecting portion (2) is configured to be connected to a connecting portion of a spray gun or an adapter screw; the cover body (1) comprises a side wall (4) extending from a side edge (3) to the tubular connecting portion (2); at least one screwing component or at least one screwing area (6) is provided on the outer surface of the side wall (4); the cup cover is combined with or separated from a fluid supply cup body by means of the screwing component or the screwing area (6).