Drive Guide Depth Indication via Sleeve Alignment
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Solution Overview
Problem
Existing drive guides lack effective visual indicators for determining the depth of fasteners driven into a workpiece, making it difficult for users to accurately achieve desired depths without visible markers or additional visualization tools.
Innovation Solution
A drive guide with a shank, barrel, and sleeve, where the barrel features axially aligned and spaced depth indicia and the sleeve includes an edge indicator that aligns with the depth markers to provide a visual indication of the fastener's depth, allowing users to determine when the desired depth is reached.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional drive guides without visual indicators are used, then the device complexity is reduced, but the measurement precision of fastener depth is insufficient
Solution Approach 1:
The patent applies visual indicators through color-coded depth markings on the barrel and corresponding colored indicators on the sleeve. The depth indicia are laser-etched with different colors or patterns that become visible when the sleeve is at specific depths, enabling users to quickly identify when the fastener has reached the desired depth without complex electronic or mechanical measurement systems.
Solution Approach 2:
The sleeve acts as an intermediary element between the user and the depth measurement system. It features indicators that align with depth markings on the barrel, providing a visual reference that mediates the measurement process. This intermediary mechanism allows for precise depth indication without requiring complex direct measurement tools.
2Measurement precision
If additional visualization tools are added to determine depth, then the measurement precision improves, but the device complexity and manufacturing costs increase
Solution Approach 1:
The depth indicators are created using laser etching that produces visible color differences or patterns on the barrel surface. This method provides clear visual depth reference without requiring additional manufactured components, reducing manufacturing complexity while maintaining measurement precision.
Solution Approach 2:
The drive guide system is self-indicating through the interaction between the sleeve indicators and the depth markings on the barrel. The system automatically provides depth information through its own components during normal operation, eliminating the need for separate visualization tools or additional manufacturing steps.
3Measurement precision
If depth indicators are made visible during operation, then the measurement precision improves, but the durability of the indicators may be compromised
Solution Approach 1:
Laser etching creates permanent color changes or patterns in the material surface that are highly resistant to wear. The depth indicia are embedded in the barrel material through laser ablation or melting, creating durable visual markers that maintain their visibility and contrast throughout the tool's service life without fading or wearing off.
Data Source
AI summary
A drive guide connectable to a power tool includes a shank, a barrel, and a sleeve. The shank includes a tool coupling portion and a barrel coupling portion. The barrel is coupled to the barrel coupling portion of the shank. The barrel includes a bit coupling portion configured to couple to a tool bit. The barrel also includes a first depth indicium disposed on a surface of the barrel and a second depth indicium disposed on the surface of the barrel. The second depth indicium is circumferentially spaced about the barrel from the first depth indicium. The sleeve is disposed concentrically about and slidable along the barrel. An edge of the sleeve provides a visual indicator to determine depth based on the first and second depth indicia.