Lid for container
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Solution Overview
Problem
Existing cup lids lack a buffer space between the mouth portion and the drinking port, causing liquids to easily overflow when the container is tilted, and the guide groove design is not effective in collecting liquid, leading to spraying and overflow.
Innovation Solution
A lid design featuring a cover portion with a supporting wall, connecting wall, and intermediate wall that defines a buffer space with opposite wide and narrow areas, along with a mouth inner wall and side arcuate portions to guide liquid flow, preventing overflow and ensuring liquid collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a guide groove is directly connected to an annular surface of the peripheral portion without a buffer space, then the structure is simple, but liquid easily overflows from the drinking port when the container is tilted
Solution Approach 1:
The patent introduces a buffer space as an intermediary chamber between the drinking port and the guide groove. This buffer space acts as a mediator that temporarily holds liquid, preventing it from directly flowing into the guide groove and causing overflow. The buffer space includes a bottom wall, side walls, and a guide groove that work together to control liquid flow direction and prevent spraying.
2Ease of manufacture
If the guide groove is directly connected to the peripheral portion, then manufacturing is easier, but liquid cannot be collected effectively and sprays from the corners of the user's mouth
Solution Approach 1:
The patent segments the liquid flow path into distinct functional zones: a buffer space for liquid collection, side walls for flow direction control, and a guide groove for guided flow. This segmentation allows liquid to be collected and directed systematically, preventing spray from the corners of the user's mouth while maintaining manufacturing feasibility through integrated molding of the segmented components.
3Device complexity
If no buffer space is provided between the mouth portion and drinking port, then the device is simpler, but liquid is easily ejected directly from the drinking port when tilted
Solution Approach 1:
The patent implements a buffer space that functions as a cushioning chamber before liquid exits through the drinking port. This buffer space absorbs and stabilizes liquid flow dynamics, preventing sudden ejection or spraying when the container is tilted. The cushioning effect is achieved through the confined space with controlled openings and guide grooves that regulate liquid flow.
Data Source
AI summary
A lid cooperates with a container to define a receiving space, and includes a cover portion, a connecting portion, and a mouth portion. The cover portion includes a supporting wall, a connecting wall, and an intermediate wall interconnecting inner edges of the supporting and connecting walls. The connecting portion is connected to a periphery of the cover portion for detachable connection with a mouth portion of the container. The mouth portion includes a mouth inner wall cooperating with the connecting wall and the intermediate wall to define a buffer space. The buffer space has opposite wide and narrow space areas. The mouth inner wall has a middle arcuate portion facing the wide space area, and two side arcuate portions each connected between one end of the middle arcuate portion and a portion of the inner edge of the supporting wall.