Electrical Connector Shielding Shell Locating Notch Stability
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Solution Overview
Problem
Conventional electrical connectors suffer from structural instability and damage due to relative movement between the connector body and metal shielding shell upon insertion of an external connector, and issues with solder material accumulation leading to disconnection and jamming.
Innovation Solution
The design includes a connector body with a front vertical stop wall and locating notch, and a metal shielding shell with positioning blocks and inwardly curved bonding strips to prevent movement and solder accumulation, ensuring stable connection and reliable bonding to a circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the connector body and metal shielding shell are connected using conventional retaining members engaged into retaining grooves, then the assembly is simple to manufacture, but the connection becomes loose and structurally unstable upon insertion of an external electrical connector
Solution Approach 1:
The retaining members are designed to be elastically deformable, allowing them to dynamically adapt to insertion forces. When external connector is inserted, the retaining members deform elastically to absorb the impact force, then return to original position, maintaining continuous engagement with the connector body without loosening
Solution Approach 2:
The retaining connection system is divided into multiple independent retaining members distributed around the connector body. Each retaining member independently absorbs localized stresses from insertion, preventing concentrated stress from causing overall connection failure. This segmentation allows simple individual components to achieve reliable collective performance
2Ease of manufacture
If ground pins are extended outwardly from the metal shielding shell for bonding to circuit board, then the bonding process is straightforward, but solder material flows along the inner surface of ground pins into the metal shielding shell, causing accumulation and potential disconnection
Solution Approach 1:
The bonding strips are designed with inward curvature instead of straight extensions. This curved geometry redirects the path of solder material flow away from the interior of the metal shielding shell. The inward curve creates a natural barrier that prevents solder paste from accumulating inside the shell while still allowing effective bonding to the circuit board
Solution Approach 2:
The inward curvature of bonding strips converts the potentially harmful solder flow into a beneficial containment feature. Instead of solder flowing freely into the shell and causing problems, the curved geometry guides and contains the solder flow in a controlled path, preventing accumulation while maintaining bonding effectiveness
3Ease of operation
If the metal shielding shell has a simple cylindrical structure with insertion hole, then the manufacturing is simple, but friction during insertion and removal of external connector is high, causing difficulty in operation
Solution Approach 1:
Instead of making the entire metal shielding shell surface smooth, only specific localized portions are modified with protrusions and grooves. These partial modifications provide the necessary friction reduction at critical contact points during insertion, while the rest of the shell maintains its simple structure for easy manufacturing
Data Source
AI summary
An electrical connector includes a connector body having an electrically insulative base block with a front vertical stop wall and a locating notch on the middle of front vertical stop wall, an electrically insulative front extension portion forwardly extended from the electrically insulative base block and conducting terminals mounted in the electrically insulative base block and the electrically insulative front extension portion, and a metal shielding shell surrounding the connector body and having a positioning block downwardly protruded from the top wall thereof and engaged into the locating notch of the electrically insulative base block of the connector body to assure connection stability between the connector body and the metal shielding shell and positive contact between the conducting terminals and an inserted external electrical connector.