Spray Can Cover Assembly With Piston Loading Mechanism
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Solution Overview
Problem
Existing spray can covers lack functionality beyond simple shielding, failing to meet user requirements for versatility and convenience.
Innovation Solution
A cover assembly for a spray can comprising an outer cover, piston cover, and insert tube, which allows for the push-pull mechanism to shield the spray cap and push contents into the can assembly, enhancing functionality by enabling on-site loading and spraying of selected contents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the cover assembly is designed with additional functional components (piston cover, insert tube, push-pull mechanism), then the functionality and versatility are improved, but the device complexity increases
Solution Approach 1:
The cover assembly is designed to perform multiple functions: it shields the spray cap when the bottom end is buckled on, and pushes contents into the can assembly when the top end is buckled on. The piston cover and insert tube work together to enable both shielding and content transfer functions within a single component assembly, eliminating the need for separate shielding and content transfer mechanisms.
Solution Approach 2:
The cover assembly incorporates a push-pull mechanism that allows dynamic transformation between two functional states. The piston cover can be pushed to enter the outer cover for shielding, or pulled to enable content insertion. This dynamic design allows the same components to serve different functions based on the operational state, increasing versatility without requiring completely separate static components for each function.
2Ease of operation
If the cover assembly includes a push-pull mechanism with piston cover and insert tube, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The shielding function and content transfer function are merged into a single cover assembly operation. By combining the outer cover, piston cover, and insert tube into one integrated assembly with a unified push-pull mechanism, the user performs a single action (pushing or pulling the cover) to achieve what would otherwise require separate operations (shielding plus content transfer). This merging reduces the number of discrete steps and improves operational convenience.
Solution Approach 2:
The cover assembly is designed to automatically perform the content transfer function when the push-pull mechanism is activated. The piston cover and insert tube work together in a self-contained manner where the user's pushing action directly drives the content transfer without requiring additional manual manipulation of separate components. The assembly serves itself by converting the user's simple pushing motion into the coordinated action of shielding and content transfer.
3Reliability
If the cover assembly uses multiple ring walls and joint structures for secure attachment, then the reliability is improved, but the ease of manufacture worsens
Solution Approach 1:
The attachment mechanism is segmented into multiple functional ring walls (first, second, and third ring walls) positioned at different locations on the outer cover. Each ring wall performs a specific attachment function: the first ring wall attaches to the valve cover, the second ring wall attaches to the inwardly-curled structure, and the third ring wall attaches to the outwardly-curled structures. This segmentation allows each attachment point to be optimized independently while maintaining overall reliability, and enables modular assembly where each ring wall can be manufactured and positioned separately.
Data Source
AI summary
A cover assembly for a spray can and the spray can comprising: an outer cover; a piston cover; and an insert tube, fixedly arranged on the top of the outer cover and communicating with an inner cavity of the outer cover. When the bottom end of the outer cover is buckled on the top of the can assembly of the spray can, the piston cover may fully enter the outer cover and shield a spray cap of the spray can; and when the top end of the outer cover is buckled on the top of the can assembly of the spray can, the inset tube may be inserted into the top so that the piston cover may sequentially push contents previously loaded into a place between the piston cover and the outer cover into the insert tube and the can assembly of the spray can after being pushed.