Container Lid Opening Mechanism with Peripheral Fulcrum
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Solution Overview
Problem
Existing container lid opening mechanisms are unsafe and require significant effort, with the stopper often entering the container during opening, posing risks and inefficiencies.
Innovation Solution
A lid design featuring a small, easily detachable stopper with a drive tab and flexible connection, where the fulcrum is positioned to prevent the stopper from entering the container, utilizing a reinforcement ridge and elasticizing connections to reduce the force required for opening and enhance safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the stopper is detached by pulling it from the lid, then the delivery hole is opened, but the stopper enters inside the container during the pulling step
Solution Approach 1:
The lid is segmented into three functional parts: a stopper (closing element), a drive tab (lever), and a flexible connection element. The drive tab acts as a separate lever arm that pivots on the lid periphery, allowing the stopper to be pulled outward without entering the container interior. This segmentation enables independent control of the opening motion path.
Solution Approach 2:
Instead of pulling the stopper directly from the center of the lid, the invention inverts the approach by using a peripheral fulcrum and lever arm (drive tab) to amplify the pulling motion. The drive tab pivots on the periphery and transfers force to the stopper, reversing the traditional center-pull mechanism to achieve safer outward extraction.
2Force
If a traditional lever or tab is used to pull the stopper, then the opening force is amplified, but the system becomes complex and requires considerable effort
Solution Approach 1:
The invention merges the drive tab (lever) and stopper (closing element) into a single integrated assembly connected by a flexible element. This combination eliminates the need for separate complex mechanisms while maintaining the mechanical advantage of the lever. The flexible connection allows the tab to pivot and pull the stopper in a coordinated motion.
Solution Approach 2:
The drive tab automatically pivots on the peripheral fulcrum when pulled, using the lid's own structure as the fulcrum point. The system self-regulates the motion path, eliminating the need for additional guides, hinges, or complex control mechanisms. The user simply pulls the tab, and the geometry of the system ensures proper stopper extraction.
3Ease of operation
If the fulcrum is positioned on the periphery of the lid, then the lever arm is maximized for easier opening, but the stopper is thrust toward the inside of the container
Solution Approach 1:
The flexible connection element between the drive tab and stopper introduces dynamic motion control. As the drive tab pivots on the peripheral fulcrum, the flexible element gradually transitions the stopper from its initial position, allowing the lever arm to be maximized without causing the stopper to thrust inward. The flexibility absorbs and redirects forces to maintain safe extraction.
4Productivity
If the stopper is made small and detachable, then the delivery hole can be opened easily, but the stopper may be lost or cause safety issues when handling
Solution Approach 1:
The drive tab serves multiple functions: it acts as the lever arm for opening, provides a gripping surface for the user, and remains attached to the stopper via the flexible element. After opening, the tab and stopper remain connected, preventing loss of the small stopper while maintaining easy access to the delivery hole. The integrated design eliminates safety issues associated with loose small parts.
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 and safe opening of the container with reduced effort, keeping the stopper within the lid's perimeter during handling, thus improving user safety and operational efficiency.
Implementation Method 1
the drive tab or lever, with its action fulcrum in correspondence with the peripheral curb of the central surface
Implementation Method 2
By acting upward on the tab, on the gripper part present toward the inside of the lid, a lever is generated which transforms said action into an action of pulling upward the element that constitutes the stopper
Implementation Method 3
a reinforcement, stabilization and stiffening ridge is provided by leveling the surface where the front part (fulcrum) of the drive tab acts
Implementation Method 4
elasticizing connections to reduce the force required for opening
Data Source
AI summary
A- lid (20) for a container (21) comprises: a central surface (27) having a substantially circular shape, on which a line of weakening (30) is made, which defines a closing element (39) which can be opened by pulling, made in the central surface (27); and a drive tab (22), having at least a first end (25) to act as a fulcrum outside the line of weakening (30) connected to the closing element (39) with a rivet (23) and able to be driven so as to remove upward, the closing element (39) from the remaining part of the central surface (27), detaching it along the line of weakening (30). The line of weakening (30) is interrupted at one end of the closing element (39) opposite to the drive tab (22), so that the closing element (39) has a connection flap (34) solid with the remaining part of the central surface (27). In the case of aluminum, the rivet is located at 1.5-3.5 mm from the front part of the closing element (39). In the case of ferrous allogs, this distance is 4.0-6.0 mm.