Probe Edge Projection Structure for Arc-Corner Guide Plate Alignment
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Solution Overview
Problem
Existing probes are difficult to accurately position when guide plates with arc-shaped corner portions are used due to interference between the probe surfaces and the arc-shaped openings, leading to inaccurate positioning.
Innovation Solution
The probe design includes projections on the outer edge portions of the support and tip members with a width narrower than the plate thickness, allowing for precise alignment with guide plates having arc-shaped corners by ensuring surface contact and avoiding interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If guide plates with arc-shaped corner portions are used, then ease of manufacture is improved, but positioning accuracy deteriorates
Solution Approach 1:
The probe body is divided into multiple flat plate-shaped members (support member, arm member, tip member) that are coupled together. This segmentation allows each member to be manufactured separately with standard flat plates, avoiding the need to manufacture complex arc-shaped corners, while still achieving accurate positioning through the collective arrangement of these segmented members
Solution Approach 2:
Instead of making the guide plates with precise right-angle corners (which would be difficult and expensive), the invention inverts the approach by designing the probe itself with flat edges that can accurately contact the arc-shaped guide plate corners. The probe's flat plate members are arranged and positioned such that their outer edge portions contact the arc-shaped corners, achieving precise positioning without requiring precise corner formation in the guide plates
2Reliability
If the probe is constrained by sliding the guide plate, then fixing reliability is improved, but positioning accuracy deteriorates due to arc-shaped corners
Solution Approach 1:
The probe incorporates flat plate-shaped members with specific local geometric qualities (flat outer edges) at the contact portions. This local quality ensures that when the guide plate is slid to constrain the probe, the flat edges of the probe members make accurate line contact with the arc-shaped corners of the guide plate openings, providing both reliable fixing and high positioning accuracy simultaneously
Data Source
AI summary
A probe includes: a foot portion having an elongated shape; a flat plate-shaped support member that is coupled to one end of the foot portion, extends in a first direction, and has a first plate thickness; an arm member that has one end coupled to the support member and extends in a longitudinal direction of the foot portion; a flat plate-shaped tip member that is coupled to the other end of the arm member, extends in the first direction, and has the first plate thickness; and a contact portion that projects from the tip member in the first direction. A projection having a width narrower than the first plate thickness in the first direction is formed on an outer edge portion of the support member and an outer edge portion of the tip member.