Substrate Positioning Structure With Cylindrical Guide Sections
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Solution Overview
Problem
Existing substrate structures with taper-shaped positioning protrusions complicate reference setting and make it difficult to process members with high accuracy during substrate positioning.
Innovation Solution
A substrate structure featuring a base plate with first positioning portions extending parallel to the extension direction of substrates, allowing for easy and accurate positioning through consistent outer peripheral surfaces in the insertion parts of positioning holes, and additional second positioning portions to prevent rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a taper shape is used for the positioning protrusion, then the positioning function is achieved, but the reference setting becomes complicated and processing accuracy decreases
Solution Approach 1:
The positioning protrusion is divided into two functional segments: an insertion part with a cylindrical shape (constant outer diameter) for accurate reference setting and processing, and a distal end part with a taper shape for guiding and positioning functionality. This segmentation allows each part to optimize its shape for its specific function, resolving the contradiction between positioning reliability and manufacturing precision.
Solution Approach 2:
Different parts of the positioning protrusion are given different geometric qualities: the insertion part has a cylindrical shape with constant outer diameter for ease of manufacturing and accurate reference setting, while the distal end has a taper shape for positioning guidance. This local differentiation of geometric properties allows the structure to simultaneously achieve both manufacturing precision and positioning reliability.
2Reliability
If a taper shape is used for the positioning protrusion, then the positioning function is achieved, but reference setting becomes complicated
Solution Approach 1:
The positioning protrusion is segmented into a cylindrical insertion part and a tapered distal end part. The cylindrical insertion part provides a simple, constant-diameter reference surface that simplifies reference setting in design and manufacturing, while the tapered distal end provides the positioning guidance function. This segmentation eliminates the complexity of reference setting while maintaining positioning reliability.
Solution Approach 2:
Instead of using a single taper shape for the entire positioning protrusion, the design inverts the approach by using a cylindrical shape for the reference-setting-critical insertion part and applying the taper only to the distal end for guidance. This inversion of the conventional single-taper design simplifies reference setting while preserving positioning functionality.
3Reliability
If the outer peripheral surface position changes in the vertical direction, then positioning is achieved, but manufacturing becomes difficult
Solution Approach 1:
The positioning protrusion is segmented into a cylindrical insertion part with constant outer diameter for easy manufacturing, and a tapered distal end part for positioning capability. This segmentation allows the majority of the protrusion (insertion part) to have a simple cylindrical geometry that is easy to manufacture with standard machining processes, while the tapered end provides the necessary positioning function.
Solution Approach 2:
The outer peripheral surface is given different geometric qualities at different locations: the insertion part has a cylindrical surface with constant diameter for manufacturing ease, while the distal end has a tapering surface for positioning capability. This local differentiation of surface geometry allows the structure to be both easy to manufacture and functionally effective.
Data Source
AI summary
In a substrate structure, an outer peripheral surface of a first positioning portion extends parallel to an extension direction in insertion parts inserted into each of first positioning holes. In this case, the insertion part of the first positioning hole of each substrate has a structure in which the outer peripheral surface of the first positioning portion is constant in the vertical direction. In this case, when the reference positions of the first positioning portion and the first positioning hole are set at the time of design, the reference setting can be easily performed. In addition, when the member is processed, the processing can be easily and accurately performed. As described above, it is possible to easily manufacture the substrate while accurately positioning the plurality of substrates.