Dual-Slide Card Connector for Jam-Free SIM Tray Ejection
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Solution Overview
Problem
Conventional card connectors with push-push mechanisms experience issues such as uneven movement, jamming, and unstable electrical connections due to asynchronous sliding movements, leading to improper insertion and withdrawal of SIM or memory cards, which can cause damage to the internal structure.
Innovation Solution
A card connector design featuring independent main and auxiliary sliding seats with distinct sliding resistances, where the main sliding seat has a cyclic guide groove and guide rod for large resistance, while the auxiliary seat has no guide groove or rod, ensuring synchronized movement and stable positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional bilateral push-push mechanism with guide grooves and guide rods on both sliding seats is used, then synchronous sliding movement is achieved, but the structure becomes complex and prone to jamming when components break down
Solution Approach 1:
The patent divides the push-push mechanism into two independent sliding seats (first sliding seat and second sliding seat) with different structural configurations. The first sliding seat includes guide grooves and guide rods for reliable positioning, while the second sliding seat omits these components to reduce complexity. This segmentation allows each component to have optimized functionality without requiring complete symmetry.
Solution Approach 2:
The patent applies different structural qualities to different parts of the system. The first sliding seat (on the card insertion side) has guide grooves and guide rods for precise positioning and reliability, while the second sliding seat (on the opposite side) has a simpler structure without these components. This local differentiation resolves the contradiction between reliability and complexity by placing guiding mechanisms only where most needed.
2Device complexity
If only a unilateral push-push mechanism is used, then the structure is simple, but the SIM card or memory card becomes skewed or shifted during insertion and withdrawal
Solution Approach 1:
The patent employs asymmetric design in the bilateral push-push mechanism. The first sliding seat has guide grooves and guide rods for stable card positioning, while the second sliding seat has a simplified structure. This asymmetric configuration provides both structural simplicity and operational smoothness by concentrating guiding functions where most beneficial rather than duplicating them symmetrically.
3Manufacturing precision
If guide grooves and guide rods are added to both sliding seats, then positioning precision is improved, but sliding resistance increases and causes uneven movement
Solution Approach 1:
The patent segments the positioning function to only the first sliding seat, which contains the guide grooves and guide rods. The second sliding seat is designed without these components, creating different sliding resistances on each side. This segmentation allows precise positioning where needed while maintaining lower overall sliding resistance for smooth card insertion and withdrawal.
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 achieves smooth operation and extended service life by preventing jamming and ensuring stable insertion and withdrawal of SIM or memory cards, maintaining balanced electrical connections.
Implementation Method 1
an elastic member, and a resisting arm; wherein the elastic member and the resisting arm are used for elastically propelling the sliding seat
Data Source
AI summary
A card connector includes an insulating holder base having a first slideway and a second slideway formed on both sides of a plug-in space therein, a terminal set with multiple conductive terminals set in the plug-in space, and a push-push mechanism including a main sliding seat and an auxiliary sliding seat independently structured and respectively set in the first slideway and the second slideway. The main sliding seat is provided with a first resisting arm, and a cyclic guide groove and a guide rod for sliding positioning. The auxiliary sliding seat has a second resisting arm. The first resisting arm and the second resisting arm are used for resisting and moving a combined structure of a preset SIM card and a tray, so that when the main sliding seat and the auxiliary sliding seat are moving, the main sliding seat has a greater resistance than the auxiliary sliding seat.