Spring Contact Pin Structure for Variable Length and Strength
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Solution Overview
Problem
Conventional spring contacts fail to meet customer demands for various lengths, are difficult to process, and incur high costs and quality issues, while rubber type sockets have low elasticity and short service life.
Innovation Solution
A contact pin structure with a body part, contact part, shoulder part, leg part, and guide part, featuring symmetrical shoulders and stopper members, allowing for easy pin hole processing and improved elasticity, reducing processing costs and time, and ensuring strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the length of contact pin is increased to meet customer demand for various lengths, then the adaptability is improved, but the manufacturing precision deteriorates because it is difficult to process a long pin hole to have a diameter for accommodation of a width of a tip part of the contact pin
Solution Approach 1:
The contact pin is divided into multiple functional segments: a tip part with a specific width for contact, a body part with constant cross-section, and a leg part that extends downward. This segmentation allows the pin hole to be processed with a single diameter that accommodates the tip part width, while the leg part can extend freely to achieve various lengths without compromising manufacturing precision.
Solution Approach 2:
Different parts of the contact pin have different cross-sectional dimensions optimized for their specific functions. The tip part has a narrower width for precise contact, while the body part has a larger constant cross-section for structural strength. This local quality differentiation enables the pin hole to be processed at a standard diameter while allowing the contact pin to achieve various lengths.
2Use of energy by moving object
If the contact pin is made finer for high-speed data processing and low power consumption, then the energy consumption is reduced, but the strength deteriorates making it difficult to guarantee quality
Solution Approach 1:
The contact pin structure separates the fine tip part (for low power consumption and high-speed processing) from the thicker body part (for structural strength). The tip part can be made finer to reduce current and power consumption, while the body part maintains sufficient thickness to guarantee mechanical strength and quality, resolving the contradiction between fineness and strength.
Solution Approach 2:
The contact pin exhibits local quality variations along its length: the tip part has a finer cross-section optimized for electrical performance (low power consumption), while the body part has a larger cross-section optimized for mechanical performance (strength). This localized differentiation allows simultaneous optimization of both electrical and mechanical properties.
3Ease of manufacture
If conventional pogo pin type spring contact is used, then the manufacturing process is simple, but the productivity deteriorates because it is difficult to meet customer demand for spring contacts of various lengths
Solution Approach 1:
The contact pin is segmented into a body part with constant cross-section and a leg part that extends downward. This segmentation allows for standardized manufacturing of the body part while the leg part length can be easily varied to meet different customer requirements, thereby maintaining manufacturing simplicity while improving productivity for various lengths.
4Ease of manufacture
If rubber type socket is used, then the ease of manufacture is improved, but the reliability deteriorates because elasticity is lost when test is repeatedly conducted
Solution Approach 1:
The patent replaces the rubber material-based elastic system with a metal spring contact pin system. The spring contact pin uses metallic elastic properties and mechanical spring structure to provide sustained elastic force, replacing the rubber socket's elastic mechanism. This substitution maintains ease of manufacture while dramatically improving elastic durability and reliability for repeated testing.
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 manufacturing of spring contacts in various lengths with reduced processing time and costs, enhanced quality, and improved durability, addressing the limitations of conventional pogo pins and rubber sockets.
Implementation Method 1
a spring part (15) elastically supporting the first contact pin (11) and the second contact pin (13)
Data Source
AI summary
Provided are a contact pin, for a spring contact, the strength of which is guaranteed when a spring contact is manufactured in various lengths and which contributes to saving costs and time required to manufacture a test socket, and a spring contact including the same. The contact pin includes a body part of a certain width and thickness, a contact part provided on one end of the body part to be in contact with an object to be inspected, a shoulder part protruding in a width direction of the body part, a leg part extending in a longitudinal direction of the body part to face the contact part, and a guide part formed in the longitudinal direction of the body part to guide a vertical movement of another contact pin when coupled to the other contact pin.