Probe Barrel Opening Geometry for Stable Plunger Alignment
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Solution Overview
Problem
Existing probes face issues with the plunger being inclined with respect to the central axis due to an inner surface of the locking portion being inclined, which affects alignment and stability.
Innovation Solution
The probe design includes a barrel with an opening whose inner surface is substantially parallel to the axial direction of the plunger, formed through precise machining to align the plunger parallel to the central axis, reducing inclination and enhancing stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the locking portion is formed by caulking, then the manufacturing process is simplified, but the plunger becomes inclined with respect to the central axis
Solution Approach 1:
The patent changes the geometric parameter of the opening from an inclined surface to a substantially parallel surface relative to the plunger's axial direction. This parameter change ensures that the plunger remains aligned with the central axis while still allowing the locking portion to be formed by caulking, thus resolving the contradiction between ease of manufacture and manufacturing precision.
2Ease of manufacture
If the inner surface of the opening is inclined, then the locking portion can be formed by caulking, but the plunger inclination increases
Solution Approach 1:
The patent modifies the orientation parameter of the opening's inner surface from inclined to substantially parallel with the plunger's axial direction. This parameter modification maintains the caulking manufacturing process while stabilizing the plunger's alignment, preventing inclination and improving overall structural stability.
3Manufacturing precision
If the opening inner surface is parallel to the plunger axial direction, then plunger inclination is suppressed, but the manufacturing complexity increases
Solution Approach 1:
The patent changes the orientation parameter of the opening to be substantially parallel to the plunger's axial direction, which suppresses plunger inclination. Despite this geometric modification, the opening can still be formed by conventional caulking processes, thus achieving high alignment precision without significantly increasing device or manufacturing complexity.
Data Source
AI summary
A probe including a plunger, and a barrel provided with an opening through which at least a part of the plunger protrudes, and an inner surface of the opening is substantially parallel to an axial direction of the plunger.