Electrical Connector Shell Interference Fit Assembly
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Solution Overview
Problem
Existing electrical connectors with metallic shells face challenges in achieving firm fixation and stable assembly due to loose control of relative positions during mounting on printed circuit boards, leading to complex and cumbersome assembly processes.
Innovation Solution
The design incorporates a metallic shell with introverted interferential tabs that engage with corresponding slots on the insulated housing, providing a secure fit and simplified assembly by using a base portion with extending arms and a spring member for elastic locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the metallic shell and insulated housing are separately mounted on the circuit substrate, then the assembly process becomes heavy and complicated, but the relative position control between the two components remains loose
Solution Approach 1:
The patent merges the metallic shell and insulated housing into a single integrated assembly unit. The shell is assembled onto the housing with interferential tabs engaging slots, creating a pre-assembled combination that is then mounted as one unit on the circuit substrate. This eliminates the need for separate mounting operations and ensures precise relative positioning is maintained during assembly.
Solution Approach 2:
The metallic shell is segmented with interferential tabs that engage with corresponding slots on the insulated housing. This segmentation allows for precise positioning and firm fixation between the two components, while the entire assembly remains manageable as a unified structure for mounting purposes.
2Ease of manufacture
If elastic lock fixation is used to join the conductive housing and metallic shell, then the two components can be joined together, but the fixation stability is affected and firm fixation is still difficult to achieve
Solution Approach 1:
The patent replaces the elastic lock mechanical fixation system with an interferential engagement system. The interferential tabs on the metallic shell engage with slots on the insulated housing through a interference fit mechanism, providing firm and stable fixation without relying on elastic locks. This mechanical substitution eliminates the instability issues associated with elastic lock fixation.
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
This solution ensures a firm and stable assembly of the metallic shell with the insulated housing, enhancing the connector's stability and ease of assembly on a circuit substrate, thereby overcoming the complexity of existing assembly methods.
Implementation Method 1
a spring member engaging with the circuit substrate
Implementation Method 2
Some interferential tabs are introverted on both of the arms and corresponding slots are formed on the insulated housing. When assembling, the interferential tabs are engaged with corresponding slots to firmly fit the metallic shell and insulated housing together.
Data Source
AI summary
An electrical connector (1) is adapted for mounting to a circuit substrate having a metallic shell (2) assembled onto an insulated housing (3). The metallic shell (2) has a base portion with two side-walls (23) and a pair of arms (24) extending from the side-walls (23). Some interferential tabs (243) are introverted on both of the arms (24) and corresponding slots (311) are formed on the insulated housing (3). When assembling, the interferential tabs (243) are engaged with corresponding slots (311) to firmly fit the metallic shell (2) and insulated housing (3) together.