Spring Pin Connector With Inclined Ground Surface
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Solution Overview
Problem
Existing spring pin connectors in electronic devices face challenges in compact design and maximum axial stroke while avoiding micro cuts, as they require slanted or biased surfaces that limit their functionality.
Innovation Solution
A spring pin connector design featuring an inclined and/or asymmetric ground surface within the female housing generates a non-axial pushing force, allowing the pin to tilt and maintain lateral contact, enabling a compact structure with a blind hole in the pin and increased spring length for enhanced connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a slanted or biased pushed surface is provided onto the pin to avoid micro cuts, then micro cuts are avoided, but the design is not compact and the maximum axial stroke of the pin is limited
Solution Approach 1:
Instead of providing the slanted surface on the pin (as in prior art), the invention inverts the approach by providing the slanted ground surface on the housing that contacts the spring. This allows the spring to apply a non-axial pushing force to the pin, creating the necessary tilt for micro cuts avoidance while keeping the pin surface simple and symmetric, thereby enabling a compact design with maximized axial stroke
Solution Approach 2:
The invention transitions the slanted surface from the pin (one-dimensional axial constraint) to the housing ground surface (introducing lateral dimension). By positioning the slanted ground surface at an angle relative to the axial direction, the spring force is decomposed into axial and lateral components, with the lateral component creating the pin tilt needed for micro cuts avoidance without compromising axial stroke
2Reliability
If a slanted or biased pushed surface is provided onto the pin to avoid micro cuts, then micro cuts are avoided, but the design is not compact
Solution Approach 1:
The invention inverts the location of the slanted surface from the pin to the housing ground surface. This allows the pin to maintain a simple symmetric geometry with a blind hole for spring accommodation, while the slanted ground surface on the housing provides the necessary tilt mechanism, resulting in a compact overall design
Solution Approach 2:
The spring is arranged partially inside the blind hole of the pin and partially in the housing cavity, with the slanted ground surface positioned to optimize space utilization. This nested arrangement minimizes the overall volume of the connector while maintaining all necessary functions
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 design effectively prevents micro cuts, maximizes the axial stroke, and reduces internal stress, allowing for a larger number of connections while maintaining a compact and cost-effective manufacturing process.
Implementation Method 1
a spring, arranged between the pin and a ground surface of the female housing to generate a pushing force on the pin, so as to push the pin into the first position
Implementation Method 2
the ground surface is inclined and/or asymmetric relative to the axial direction... the spring pushes the pin with a non axial or non aligned pushing force, creating a tilting of the pin and thus a lateral contact between the pin and the housing
Data Source
Figure 1~3c
AI summary
Spring pin connector, comprising: - a female housing (10 ; 10') comprising a hole (12 ; 12') defining an axial direction (XX'), - a pin (20), provided moveable in the hole (12 ; 12') of the female housing (10 ; 10') along the axial direction (XX'), between a rest position and a connecting position, - a spring (30), arranged between the pin (20) and a ground surface (11) of the female housing (10 ; 10') to generate a pushing force, so as to push the pin (20) into the rest position, characterized in that the ground surface (11) is inclined and/or asymmetric relative to the axial direction (XX').