Snap-Lid Container With Acute-Angle Flanges For Angular-Independent Mounting
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Solution Overview
Problem
Existing container lid mounting systems require specific angular positioning and additional torque to secure the lid, which complicates automated installation and can lead to interference issues during assembly.
Innovation Solution
The container design features radially protruding flanges on the peripheral rim and lid with a tapered skirt portion and acute-angle snap faces, allowing the lid to snap into place at any angular position, ensuring secure locking without additional equipment, and providing a flexible engagement mechanism for easy assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lid is designed to be mounted at any angular position without specific positioning, then the ease of operation and automation is improved, but the reliability of secure locking may be compromised
Solution Approach 1:
The peripheral rim and lid are segmented into multiple discrete flanges (radially protruding flanges on the rim, radially inward protrusions on the lid) that can engage at different angular positions. This segmentation allows the lid to be mounted at any angular position while maintaining reliable locking through the distributed engagement points of multiple flanges.
Solution Approach 2:
The snap faces of the flanges are designed with acute angles relative to the central axis, creating a geometric parameter that enables automatic engagement and locking. This angular parameter change allows the flanges to snap into place reliably regardless of the initial angular position, transforming the mounting process into a self-locking mechanism.
2Reliability
If vertical V-formed juts are used to prevent loosening, then the reliability of locking is improved, but the ease of manufacture and automation is worsened due to interference issues
Solution Approach 1:
Instead of using protruding juts that extend outward to prevent loosening (which cause interference), the design uses inward-facing acute-angle snap faces on the flanges. This inverted approach creates the anti-loosening effect through the geometric configuration of the snap faces themselves, eliminating the need for obstructive protrusions and enabling smooth automated assembly.
3Reliability
If additional torque is required to move juts past each other, then the reliability of locking is improved, but the ease of operation and productivity is worsened
Solution Approach 1:
The acute-angle snap faces are designed to automatically guide the lid into the correct angular position and secure the locking engagement without requiring external torque application. The geometric configuration of the snap faces creates a self-aligning, self-locking mechanism that eliminates the need for additional torque during assembly, thereby improving productivity while maintaining reliable locking.
Data Source
AI summary
The container (1) has a detachable lid (8) adapted to engage a peripheral rim (5) of a top opening. The peripheral rim has radially protruding flanges (7), and the lid has radially protruding flanges (8) adapted to, in a first angular position of the lid, pass in between the radially protruding flanges of the peripheral rim (5) and, in a second angular position, be engaged with the radially protruding flanges (7) of the peripheral rim. The flanges (7, 8) are adapted to, by pressing the lid (6) onto the peripheral rim, in the second angular position, snap over each other. A skirt portion (12) of the radially outwards protruding flanges (7) of the peripheral rim (5) is provided with a rounded indentation (14) into which a rounded protrusion (15) of a radially inwards protruding flange (8) may snap. Secondary snap faces (19) of the lid (8) forming an acute angle with the central axis (9) of the peripheral rim (5) of the top opening (4) include the rounded protrusions (15) of the radially inwards protruding flanges (8).