Depth Gauge Probe With Grooved Insert For Blind Hole Measurement
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Solution Overview
Problem
Existing depth gauges struggle to accurately measure the depth of smaller diameter blind holes due to difficulties in engaging the hook with the distal edge of the hole.
Innovation Solution
A depth-measuring tool with a probe and grooved insert system, where the probe has a scale and abutment, and a tubular housing that allows for precise engagement and measurement by sliding components to avoid impingement and ensure accurate readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single hook on a calibrated rod is used to measure hole depth, then the device is simple in structure, but the hooking engagement with the distal edge becomes difficult especially for smaller diameter holes
Solution Approach 1:
The device is divided into separate functional components: a probe with hook for engagement, a calibrated rod for measurement, and a housing for protection. This segmentation allows each component to be optimized independently - the hook can be designed for effective engagement while keeping the overall device simple
Solution Approach 2:
The housing acts as an intermediary that protects the probe and rod while allowing them to function independently. It provides a stable base for the probe to engage with the hole edge while the rod can be freely moved for measurement
2Measurement precision
If the probe is designed to firmly engage the distal edge for precise measurement, then measurement precision improves, but the device complexity increases
Solution Approach 1:
The probe is designed with specific local qualities - a sharp hook at the distal end for engagement and a smooth shaft for insertion. The hook geometry is optimized locally to engage the hole edge effectively while the rest of the probe remains simple for easy insertion and movement
Solution Approach 2:
The probe is pre-formed with the hook geometry and sharp edges during manufacturing, so that when inserted, it immediately engages the hole edge effectively without requiring complex adjustment mechanisms during use
Data Source
AI summary
A depth gauge for measuring the depth of blind holes in bones and/or nails inserted into bones is provided. The tool includes a probe with an abutment at its end to engage against the distal edge of the blind hole; a tubular body; and a grooved insert. After the probe, slidably disposed within the tubular body, is positioned through the blind hole to be measured, the grooved insert is slid forward inside the tubular body, surrounding the probe, and pushing the probe sideward, towards the blind hole wall. When probe and groove insert are retracted together, they firmly engage against the distal bone wall. The tubular housing is then pushed forward until it abuts against the proximal bone wall, allowing even in small diameter holes, an accurate reading of hole depth on the scale located at the rear end of the probe.