Lid Dispenser Flap with Snap-Fit Locking for Spill-Free Reopening
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Solution Overview
Problem
Existing lids for containers, such as beverage cups, lack an efficient and user-friendly dispensing mechanism that prevents spills and keeps solids from entering the drinking opening, requiring complex mechanisms for opening and closing.
Innovation Solution
A lid design featuring a dispenser flap foldably connected to a central wall with a projection and ledge, allowing the flap to move into a dispensing position where it locks with the ledge, creating a controlled opening that prevents solids from entering while allowing easy fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a hinged flap valve with post and catch edge is used, then the dispensing function is achieved, but the operation becomes complex requiring deflection of sidewall and distortion of catch edge to re-close
Solution Approach 1:
The invention extracts the closing action from complex wall deflection and catch edge distortion, isolating it to a simple snap-fit engagement between the projection and ledge. The projection is removed from the flap and placed on the ledge, transferring the closing function to a passive mechanical engagement rather than active deformation.
Solution Approach 2:
The closing mechanism is segmented into distinct functional elements: the projection on the ledge serves as the locking element, while the flap simply needs to return to its original position. This segmentation allows the closing action to be independent of wall deflection or catch edge distortion, simplifying the operation.
2Ease of operation
If the catch edge is made to distort outwardly to widen the hole, then the valve can be re-closed, but the structural integrity is compromised
Solution Approach 1:
The projection is pre-positioned on the ledge in a ready-to-engage state. When the flap returns to its closed position, the projection automatically snaps into place on the ledge without requiring any distortion or deformation of structural elements. The closing action is prepared in advance through the snap-fit design rather than through forced deformation.
3Device complexity
If a simple hinge mechanism is used, then the structure is simple, but the dispensing position cannot be reliably maintained
Solution Approach 1:
The projection on the ledge provides self-locking functionality that automatically maintains the dispensing position without requiring external forces or complex mechanisms. Once the flap is opened, the projection engages with the ledge to hold the position, and the hinge naturally returns the flap to closed position when released, creating a self-regulating system.
Data Source
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AI summary
A lid for a container. The lid can comprise a central wall and a dispensing feature comprising a dispenser flap foldably connected to the central wall, a projection extending from the dispenser flap, and a ledge. The dispenser flap can be movable to a dispensing position in which the dispenser flap is spaced from the ledge to at least partially form a dispensing opening. The projection can be in locking engagement with the ledge when the dispenser flap is in the dispensing position.