Electrical Connector Slider Structure for Narrow-Pitch Coplanarity
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Solution Overview
Problem
Existing electrical connectors struggle to maintain coplanarity of terminal parts with narrow pitches, particularly when the receptacle has a terminal pitch of 0.5 mm or less, due to challenges in achieving the required positional accuracy between the fixing position of the receptacle to the case and the connecting position to the substrate.
Innovation Solution
The electrical connector design includes a case with an accommodation part, a retaining part, and a slider that allows the receptacle to be vertically movable, enabling the terminal parts to be soldered to the mounting surface while maintaining coplanarity by using a hold-down to restrict lateral deformation of the engagement parts, ensuring the receptacle is securely retained and aligned.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the terminal pitch of the receptacle is reduced to increase connection density, then the quantity of connections per area increases, but the required coplanarity becomes more severe and difficult to achieve
Solution Approach 1:
The invention divides the receptacle into two independent height zones: the body portion retained in the accommodation part and the terminal parts that protrude downward. This segmentation allows the terminal parts to achieve coplanarity with the mounting surface independently of the receptacle body's position, resolving the contradiction between narrow pitch and coplanarity requirements
Solution Approach 2:
The invention introduces vertical dimensionality by allowing the terminal parts to protrude downward from the accommodation part in the vertical direction. This enables the terminal parts to reach the mounting surface plane while the receptacle body remains positioned higher in the accommodation part, thus achieving coplanarity without compromising connection density
2Reliability
If the receptacle is tightly retained in the accommodation part to prevent falling out, then the reliability of retention improves, but the coplanarity of terminal parts becomes difficult to maintain due to lateral deformation
Solution Approach 1:
The engagement parts are designed with asymmetric local qualities: the outer surfaces facing the retaining part have high rigidity for stable retention, while the inner surfaces providing lateral support to terminal parts have reduced rigidity. This local differentiation allows tight retention without transmitting excessive lateral forces that would deform the terminal parts and compromise coplanarity
Solution Approach 2:
The invention changes the rigidity parameter of engagement parts by making them asymmetric: higher rigidity on the outer surface for retention and lower rigidity on the inner surface for terminal support. This parameter differentiation enables the system to achieve both reliable retention and maintained coplanarity of terminal parts
Data Source
AI summary
An electrical connector includes: a case including an accommodation part that accommodates a receptacle, a front wall part, a restriction part, and an engagement part that retain the receptacle in the accommodation part, a contact part that makes contact with a mounting surface, and a communication hole that is extended upward from the accommodation part and open to outside at its upper end and vertically movably retains a slider; the receptacle that includes a terminal prat located at the same height as the contact part or below the contact part and is movable upward; and the slider that can press down the receptacle retained in the accommodation part by the front wall part, the restriction part, and the engagement part.