Driver Bit Holder Mechanism for Compact Fastening Tools
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Solution Overview
Problem
Existing fastening tools with air pressure or spring mechanisms have complex configurations for rotating and moving driver bits, and often feature complicated mechanisms for interlocking these functions, and struggle with easy bit replacement and secure attaching/detaching mechanisms, especially when space is limited.
Innovation Solution
A fastening tool with a cylindrical rotation guide member and a holding member that moves and rotates together, utilizing a connecting member and a ball-and-spring mechanism for easy bit attachment and detachment, allowing for simple rotation and movement of the driver bit while securing the ball's retreat path within the tool's structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a known attaching/detaching holding mechanism with a ball and spring is used, then the driver bit can be detachably held, but the ball needs to retreat during insertion and removal operations which requires additional space that cannot be secured in compact designs
Solution Approach 1:
The ball's retreat path is redirected from a radial direction (which would require additional radial space) to an axial direction along the driver bit's insertion path. The groove in the holding member guides the ball to move axially during bit attachment/detachment operations, eliminating the need for additional radial space while maintaining the ball-spring mechanism's functionality.
Solution Approach 2:
The ball and spring mechanism is nested within the holding member's groove structure. The groove is formed as an integral part of the holding member, and the ball moves within this nested pathway during operation. This nested design allows the retreat mechanism to be incorporated without adding external dimensions to the tool.
2Productivity
If air pressure or spring mechanisms are used to move and rotate the driver bit, then the screw can be fastened, but the configuration becomes complicated with complex interlocking mechanisms
Solution Approach 1:
The holding member integrates multiple functions into a single component: it holds the driver bit, guides its axial movement, enables rotation through the groove mechanism, and houses the ball-spring attachment system. This merging of functions eliminates the need for separate interlocking mechanisms for each function, simplifying the overall device while maintaining screw fastening capability.
Solution Approach 2:
The holding member serves as a universal component that performs attachment/detachment, axial movement guidance, and rotational movement guidance simultaneously. The groove structure provides multi-functionality by guiding both the ball's retreat path and the driver bit's rotation, replacing what would traditionally require multiple specialized components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration simplifies the mechanism for rotating and moving driver bits, enables easy bit replacement, and maintains a compact design by securing the ball's retreat path within the tool, allowing for efficient screw fastening without increasing the tool's size.
Implementation Method 1
a spring for urging the ball in a direction in which the ball is exposed in the opening
Data Source
AI summary
A fastening tool includes: a cylindrical rotation guide member extending in one direction and rotatably supported; a holding member having an opening to which a driver bit is detachably inserted, and configured to move in an axis direction along the extension direction of the rotation guide member inside the rotation guide member and to rotate together with the rotation guide member; and a moving member configured to move the holding member in a front and rear direction along the rotation guide member.