Removable USB Connector Structure With Solderless PCB Contact
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Solution Overview
Problem
Traditional USB connectors are difficult to detach from circuit boards, requiring tools and increasing repair complexity, and their substrate elastic contact portions are too long, leading to poor impedance and high-frequency characteristics and increased interference.
Innovation Solution
An electrical connector design featuring a fixing portion group and limiting portion group for tool-free mounting and removal, with a substrate elastic contact portion in a single-row arrangement, eliminating the need for soldering and reducing transmission distance to improve impedance and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional USB connectors are fixed on circuit board by soldering, then the connector is firmly fixed and stable, but the repair process becomes complicated and repair cost increases
Solution Approach 1:
The connector is divided into separable components: a shielding shell assembly that can be independently removed from the circuit board, and the circuit board itself. The fixing portion group on the shielding shell allows it to be firmly fixed during use but easily removed when repair is needed, without requiring soldering removal processes.
Solution Approach 2:
The connector transitions from a static soldered connection to a dynamic removable connection. The fixing portion group enables the shielding shell to be firmly fixed during normal operation but can be quickly removed by applying upward force, allowing the connector to adapt between stable operation and easy repair states.
2Reliability
If substrate elastic contact portion is set in double-row arrangement, then more contact points are provided, but the difficulty and complexity of operation increases and interference between rows occurs
Solution Approach 1:
The design extracts the substrate elastic contact portion from a double-row arrangement and repositions it to contact the circuit board from a different location. This single-row arrangement eliminates the complexity and interference issues of dual rows while maintaining adequate contact stability through the elastic pressing mechanism.
3Reliability
If substrate elastic contact portion is made too long to ensure contact, then contact stability is improved, but transmission distance increases and impedance deteriorates
Solution Approach 1:
The length of the substrate elastic contact portion is optimized to an appropriate value that balances two requirements: long enough to ensure stable elastic pressing contact with the circuit board, but not excessively long to avoid increasing transmission distance and degrading impedance characteristics. This parameter optimization resolves the contradiction between contact reliability and signal quality.
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
Enables quick and stable mounting and removal without tools, meeting the French repairability index, while enhancing impedance and reducing interference, thus simplifying operations and maintaining high-frequency characteristics.
Implementation Method 1
the substrate elastic contact portion is formed by extending from the differential contact portion and is set in a single-row arrangement... due to an elastic structure formed by the first bending portion, the first inclined portion, the second bending portion, and the second inclined portion, the substrate elastic contact portion is set in a more stable contact engagement with the circuit substrate
Data Source
AI summary
An electrical connector includes a shielding shell, a fixing portion group, a limiting portion group, an insulating plastic body group, a transmission conductor group, a differential contact portion, a substrate elastic contact portion, a horizontal extension portion, a first bending portion, a first inclined portion, a second bending portion, and a second inclined portion. The shielding shell is movably mounted to and removable from a circuit substrate by the fixing portion group and the limiting portion group, in such a way that a tool is directly inserted into a gap between the shielding shell and the circuit substrate to apply an upward force to quickly separate the electrical connector from the circuit substrate, or to realize separation through a clamping manner. Through point-to-surface contact between the second bending portion and the circuit substrate, conducting can be achieved without soldering.