Mounting Member Relief Recess for IC Socket Positional Accuracy
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Solution Overview
Problem
Existing mounting members and guide pins suffer from poor seating properties and reduced positional accuracy due to gaps between the frame body and guide pins, which affects the precise positioning of IC packages and other components requiring high accuracy.
Innovation Solution
A mounting member with a shaft body featuring a relief recess at its base, a tapered portion, and a caulking hole, which ensures secure contact with the supporting member and prevents dislodgment, along with a cylindrical straight portion for stable insertion, enhancing seating properties and positional accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If guide pins are mounted to the frame body with conventional methods, then the structure is simple and easy to manufacture, but the seating property is poor and positional accuracy is reduced
Solution Approach 1:
The guide pin is divided into distinct functional segments: a protruding portion that contacts the support face, a shaft body with relief recess for insertion, and a tapered portion for caulking. This segmentation allows each part to perform its specific function optimally, ensuring high positional accuracy through the protruding portion while maintaining ease of manufacture through standardized insertion and fixation methods
Solution Approach 2:
The relief recess is pre-formed at the base portion of the shaft body before insertion into the supporting member. This preliminary action ensures that when the shaft body is inserted, it can be properly seated and fixed without requiring complex post-insertion adjustments, thereby achieving high positional accuracy while keeping the overall structure relatively simple
2Reliability
If the shaft body is inserted into the insertion hole without a relief recess, then the manufacturing process is simpler, but gaps form at the connecting portion reducing seating property
Solution Approach 1:
The relief recess is created only at the specific location where it is needed - the base portion of the shaft body that inserts into the supporting member. This localized modification improves seating property by ensuring proper fit and eliminating gaps at the critical connecting portion, while the rest of the guide pin maintains its simple cylindrical shape that is easy to manufacture
Solution Approach 2:
The relief recess acts as an intermediary feature that mediates between the shaft body and the supporting member. It provides a transition zone that allows the shaft body to be properly seated in the insertion hole, ensuring reliable connection without requiring complex manufacturing processes for either component
3Measurement precision
If the protruding portion does not contact the support face accurately, then alignment is easier, but positioning accuracy of IC packages is poor
Solution Approach 1:
The protruding portion is designed to contact the support face at a specific elevated position, creating a stable reference plane. This equipotential contact surface ensures that the guide pin is positioned at a consistent, accurate height relative to the supporting member, enabling precise positioning of IC packages without complex alignment procedures
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
The solution improves the seating property and positional accuracy of the mounting member, ensuring precise alignment and secure fixation of components, thereby enabling high-accuracy positioning and stable electrical connections.
Implementation Method 1
a tapered portion is formed that decreases in diameter towards a tip of the shaft body, and a caulking hole is formed along a shaft center of the shaft body in a form that opens at the tip of the shaft body, and the tapered portion is configured so as to contact an inner wall face of the insertion hole as a result of caulking being performed so that the caulking hole expands
Data Source
AI summary
To improve a seating property of a mounting member with respect to a supporting member and enhance the positional accuracy of the mounting member. The mounting member has a protruding portion that protrudes from a support face of a frame body, and a shaft body that is thinner than the protruding portion. At a base portion of the shaft body, a relief recess is formed over the entire circumference of a boundary region with the protruding portion, and a supported face of the protruding portion is configured so as to contact with a support face of the frame body in a state in which the mounting member is supported by the frame body. In a preferred embodiment of the present invention, the mounting member is used as a guide pin of a floating plate that accommodates an IC socket.