Downward Push Tab Lever Mechanism for Low-Profile Containers
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Solution Overview
Problem
Conventional containers with small heights or strong holding forces are difficult to open, especially for elderly or weak individuals, as they require significant thumb strength and space for the thumb to operate the traditional upward push tab.
Innovation Solution
A container design featuring a pushing means with a contact portion that moves downwards, leveraging a lever mechanism to displace a lifting means upwards, reducing the required opening force and facilitating access for users with limited strength, by utilizing a pushing means and a lifting means positioned beneath the cover's abutment, allowing for a more convenient and easier opening mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional thumb tab is used for opening the container, then the container can be opened with a simple structure, but it requires significant thumb strength and space that is unavailable in small-height containers
Solution Approach 1:
The patent inverts the conventional opening mechanism by replacing the upward push tab with a downward push tab. Instead of lifting the cover upward as in traditional designs, the user pushes the tab downward to activate a lever mechanism that lifts the cover. This inversion allows the mechanism to work effectively within the limited vertical space of small-height containers while maintaining ease of operation.
Solution Approach 2:
The patent introduces a lever mechanism as an intermediary between the user's finger input and the cover lifting action. The lever mechanism translates the downward push on the tab into upward motion of the cover, providing mechanical advantage and enabling the opening of small-height containers with strong holding forces without requiring direct upward thumb strength.
2Reliability
If the container has strong holding forces in closed position, then the container remains securely closed, but it requires excessive force to open which is difficult for elderly or weak individuals
Solution Approach 1:
The lever mechanism serves as a mechanical intermediary that amplifies the user's input force. By positioning the fulcrum appropriately, the system provides mechanical advantage, allowing users with limited strength to overcome strong holding forces securing the container in its closed position.
Solution Approach 2:
The patent changes the force application parameters by using a downward pushing motion instead of upward lifting. This parameter change allows users to utilize the stronger finger flexor muscles rather than weaker extensor muscles, effectively reducing the perceived opening force requirement while maintaining secure closure.
3Ease of operation
If a downward push tab mechanism is implemented, then the opening force is reduced for users with limited strength, but the device complexity increases
Solution Approach 1:
The opening mechanism is segmented into distinct functional components: a downward push tab for user input, a lever mechanism for force amplification, and a lifting means for cover displacement. This segmentation allows each component to be optimized independently while working together to reduce opening force requirements.
Solution Approach 2:
The lever mechanism serves multiple functions: it acts as a fulcrum for mechanical advantage, provides structural support for the tab, and guides the lifting motion of the cover. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity despite the enhanced ease of operation.
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
The container design reduces the force needed to open the container, making it accessible to users with limited strength and improving usability for containers with small heights or strong holding forces, ensuring easier access to stored products.
Implementation Method 1
A container design featuring a pushing means with a contact portion that moves downwards, leveraging a lever mechanism to displace a lifting means upwards, reducing the required opening force
Data Source
Figure 1~2
Figure 3a~3b
Figure 4a~4b
AI summary
A container for loosely stored products comprises a container body (1), a cover (3) for closing an opening end of the container body (1), the cover (3) being movable between a closed position closing the opening end of the container body and an open position, and an opening means (4) provided on the container body (1) wherein the opening means (4) comprises a pushing means (40) with a contact portion (403), preferably a push tab, and a lifting means (402) positioned, in the closed position of a cover (3), beneath an abutment (30) of the cover (3), the contact portion of the pushing means (40) being arranged to be pushed away from the opening end of the container body (1) such that the lifting means (402) displaces the abutment (30) of the cover (3).