Card Holder Groove Integration for Thin Electronic Devices
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Solution Overview
Problem
Existing electronic device designs face challenges in achieving lightweight, thin, and aesthetically pleasing form factors due to the thickness contributed by card holders and connection members when installing function cards, which are typically connected via welding or press-fitting to printed circuit boards.
Innovation Solution
The electronic device incorporates a printed circuit board with a groove to house a card holder, featuring metal solder pads and printed wires for electrical connection, eliminating the need for press-fitting or welding, and using terminals with elastic contacts to ensure reliable connections while reducing overall thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a card holder is disposed above a printed circuit board and connected via welding or press-fitting, then the function card can be installed and electrically connected, but the overall thickness of the electronic device increases
Solution Approach 1:
The card holder is nested within a groove formed on the printed circuit board, allowing the card holder to be positioned inside the board thickness rather than adding to it. This nesting approach enables the card holder to hold the function card while maintaining a compact overall structure that reduces the electronic device's thickness.
Solution Approach 2:
The electrical connection is achieved by extending the terminal vertically through the card holder to contact metal solder pads on the printed circuit board, changing the connection dimension from horizontal (surface mounting) to vertical (through-hole style). This dimensional change allows reliable electrical connection without requiring additional thickness for connection members.
2Strength
If connection members and supporting portions are used to connect the terminal to the printed circuit board, then the terminal can be securely fastened, but the thickness of these components increases the overall device thickness
Solution Approach 1:
The invention extracts and eliminates the separate connection members and supporting portions from the traditional structure. Instead of using additional components to fasten the terminal to the printed circuit board, the terminal is directly integrated with the card holder and contacts the metal solder pads through the groove structure, removing unnecessary thickness-contributing elements while maintaining connection strength.
3Ease of operation
If the card holder is positioned above the printed circuit board, then the function card can be installed, but the height of the card holder directly affects the overall thickness
Solution Approach 1:
The card holder is nested within a groove formed on the printed circuit board, allowing the card holder to be positioned inside the board thickness rather than adding to it. This nesting approach enables the card holder to hold the function card while maintaining a compact overall structure that reduces the electronic device's thickness.
Data Source
AI summary
An electronic device includes a printed circuit board and a card holder. The card holder is configured to hold a function card, and the printed circuit board is provided with a groove. The card holder is disposed in the groove. A bottom surface of the groove is provided with n metal solder pads and n printed wires. The n metal solder pads are electrically connected to the n printed wires in a one-to-one correspondence. N terminals in a one-to-one correspondence to the n metal solder pads are disposed on the card holder. Each terminal is provided with a first contact and a second contact. The first contact is connected to and in contact with one of the n metal solder pads. The second contact is configured to connect to and be in contact with a metal contact of the function card placed in the card holder.