Rotatable Lever Card Unit for Tool-Free Connector Exchange
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Solution Overview
Problem
The existing methods for attaching and detaching cards, such as printed circuit boards, in electronic apparatuses like server units are cumbersome, requiring tools like screwdrivers and resulting in potential damage and reduced maintenance efficiency due to accuracy issues and the risk of electrostatic damage.
Innovation Solution
A card unit with a frame that expands and contracts, equipped with a rotatable attaching/detaching mechanism, locking mechanism, and protection cover, allowing for easy attachment and detachment without tools, while maintaining accuracy and protecting the card.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a tool like a screw-driver is used to attach and detach cards, then the card can be exchanged, but the operation becomes cumbersome and time-consuming
Solution Approach 1:
The card unit is designed with a lever-operated mechanism that allows the card to be attached and detached without external tools. The lever directly actuates the frame to expand and contract, enabling the card to self-eject from the connector when the lever is moved, thus making the system self-servicing.
Solution Approach 2:
The frame is designed to be dynamically expandable and contractible through the lever mechanism. When the lever is moved, the frame transitions between expanded and contracted states, automatically adjusting its shape to either secure or release the card from the connector without requiring manual intervention with tools.
2Ease of operation
If a tool like a screw-driver is used to access the card, then the card can be exchanged, but the accuracy of connection may be lowered due to careless contact with components
Solution Approach 1:
The mechanism uses the lever to directly control the frame's expansion and contraction, which in turn automatically positions and secures the card to the connector with precise alignment. This eliminates the need for manual tool operation that could cause careless contact with components.
Solution Approach 2:
The frame acts as an intermediary between the lever and the card. When the lever is moved, it actuates the frame to expand or contract, which then precisely positions the card relative to the connector. This intermediary mechanism ensures accurate connection without direct manual handling of the card or connector.
3Device complexity
If the card is directly attached to the connector without a frame mechanism, then the structure is simple, but the card may become loose or misaligned during operation
Solution Approach 1:
The frame is designed to dynamically change its shape between expanded and contracted states through the lever mechanism. When expanded, the frame securely holds the card in place; when contracted, it allows the card to be released. This dynamic adaptation ensures reliable connection stability while maintaining a relatively simple overall structure.
Data Source
AI summary
A card unit on which a card attached to a connector and detached from it is loaded has a frame, which is loaded with the card and is expanded and contracted, and an attaching/detaching mechanism which attaches the card to the connector and detaches the card from the connector by expanding and contracting the frame. The attaching/detaching mechanism has a rotatable attaching/detaching lever which makes the frame expand and contract by its rotational operation. A maintaining part (maintaining surface parts) is provided, and the frame is maintained at a position, at which the card is disengaged from the connector, by the maintaining part.