Movable Catch Lid With Locking Mechanism
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Solution Overview
Problem
Existing lid fastening systems for cans with tubular side walls, such as spring-loaded cam levers and elastically deformable catches, face issues like requiring multiple lid sizes, difficulty in removal, and risk of untimely separation from the can.
Innovation Solution
A lid design featuring a movable catch with locking means that allows for long movement strokes to adapt to various can formats and prevents untimely separation, using a pivotally mounted catch with locking mechanisms that can be unlocked elastically, and an elastically deformable gasket for enhanced sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If elastically deformable catches are used for fastening the lid to the can, then the lid can be fastened to various can sizes, but the lid is difficult to remove and requires large manual pressure with risk of tipping over the can
Solution Approach 1:
The catch is designed with movable elements that transition between locked and unlocked states. The movable catch (143) can pivot between positions, and the cam lever (20) transforms rotational motion into linear movement to unlock the catch, making removal easy without requiring large manual pressure
Solution Approach 2:
The fastening system is divided into independent catches (141, 142, 143) that can be individually actuated. Each catch has its own locking mechanism, allowing selective engagement and disengagement, which simplifies the removal process compared to a monolithic fastening system
2Ease of operation
If spring-loaded cam levers are used for fastening the lid to the can, then the lid can be easily operated, but the system requires springs and must be placed partially in contact with the contents of the can
Solution Approach 1:
The spring element is extracted from the fastening mechanism and replaced with an elastic deformable catch (143) that uses material elasticity instead of a separate spring component. This eliminates the need for springs while maintaining the cam lever action for easy operation
Solution Approach 2:
The catch is made of elastic material that can deform under load and return to its original shape. This change in material parameter allows the catch to function without springs, providing both ease of operation and avoiding contamination risks
3Ease of operation
If elastically deformable catches are used without locking means, then the lid is easy to remove, but there is risk of untimely separation from the can
Solution Approach 1:
The catch incorporates dynamic locking and unlocking capabilities. The cam lever (20) transforms rotational motion into linear movement that unlocks the movable catch, allowing easy removal when needed while maintaining secure fastening during normal use
Solution Approach 2:
The locking mechanism provides tactile and mechanical feedback to indicate when the lid is properly secured. The catch engages with positive locking, giving user confidence that the lid will not separate untimely, while the same mechanism enables easy controlled removal
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
Enables easy installation and removal of the lid, adapts to multiple can sizes, and prevents untimely separation by ensuring secure fastening through the use of locking mechanisms and an annular sealing gasket.
Implementation Method 1
the movable catch provided with an active fastener portion or at least one of the movable catches provided with active fastener portions is mounted to move about an axis, or in a plane substantially parallel to a circumferential plane of the annular sealing gasket
Implementation Method 2
the lid is provided with locking means for locking said movable catch in the closer position in which its active fastener portion is closer to the active fastener portion of at least one other catch
Implementation Method 3
an elastically deformable gasket that, in the non-deformed state, is in the general shape of a half-torus
Data Source
AI summary
A lid (1) for closing a can having a collar, the lid having a bottom face (2) provided with an annular sealing gasket (4) bearing against said collar when the lid (1) is in the closed state, and being provided with fastener means (14) for fastening the lid (1) to the can, which fastener means (14) comprise at least two catches (141, 142, 143) disposed about the sealing gasket (4) and having an active fastener portion (1411, 1421, 1431) that projects towards the center of the lid (1), and that is positionable under an external radial peripheral rim of the can when a movable one (143) of the catches is in a closer position in which it is closer to the other catches (141, 142). The movable catch (143) is mounted to move about an axis (XX′) or in a plane that is substantially parallel to a circumferential plane of the annular gasket (4), and the lid (1) is provided with locking means (19) for locking said movable catch (143) in the closer position in which its active fastener portion is closer to the active fastener portions of the other catches (141, 142), these locking means (19) being unlockable.