Lever Card Holder Mechanism for Smooth, Low-Wear Ejection
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Solution Overview
Problem
Existing card holders suffer from wear and deformation of the force-applying mechanism, leading to jamming and increased resistance, resulting in unreliable card ejection.
Innovation Solution
A card holder design featuring a sliding pushing member with an elastic element, a stepped component, and a chute mechanism that reduces wear by allowing stable and precise card ejection through a rotating chute and shaft assembly, enhanced by a limiting mechanism and anti-loosening features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a force-applying mechanism is used to push cards out repeatedly, then card ejection function is achieved, but the mechanism wears, deforms and breaks causing jamming and increased resistance
Solution Approach 1:
The patent transforms the static force-applying mechanism into a dynamic lever-based system. The pushing member rotates around a pivot point, converting linear sliding motion into rotational leverage. This dynamic mechanism reduces wear by distributing contact forces and minimizing direct friction between sliding surfaces, thereby extending the service life while maintaining reliable card ejection functionality
Solution Approach 2:
The patent introduces a lever arm as an intermediary between the user's pushing force and the card ejection action. This lever mechanism amplifies the applied force while reducing the wear on the pushing member itself, as the force is distributed through the lever's rotational movement rather than concentrated on a single sliding contact point
2Ease of operation
If a sliding pushing member is used, then card pushing function is achieved, but friction and resistance increase causing jamming
Solution Approach 1:
The pushing member transitions from linear sliding motion to rotational lever motion. This dynamic change reduces friction by minimizing the contact area and duration between the pushing member and the base, allowing smoother card ejection with lower resistance force
Solution Approach 2:
The patent moves the pushing mechanism from one-dimensional linear sliding to two-dimensional rotational movement. By pivoting the pushing member around a fixed point, the system exploits rotational mechanics to reduce frictional resistance and improve 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 design ensures stable and durable card ejection with reduced wear, improving the reliability and longevity of the card holder by minimizing friction and preventing mechanical failures.
Implementation Method 1
an elastic element capable of exerting a force to reset the pushing member in a sliding direction thereof
Data Source
AI summary
A card holder includes a case, inside which a space for stacking a card is formed; a base connected to a bottom end of the case, a through hole being formed in one side of the base; a pushing member configured to be slidably assembled to the base via the through hole; an elastic element capable of exerting a force to reset the pushing member in a sliding direction thereof; a stepped component hinged to the pushing member at one end thereof, a step cooperating with the card being arranged on the other end of the stepped component, a chute being arranged in a middle of the stepped component and throughout a direction perpendicular to the sliding direction; a first shaft passing through an interior of the chute and fixed to the base.