Quick-Release Bit Holder Structure for Compact Nose Cone Fit
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Solution Overview
Problem
Existing bit holders for power screwdrivers are difficult to remove and replace, and existing quick-release structures are either too large for nose cones or require manual pressing, causing inconvenience and inefficiency.
Innovation Solution
A quick-release bit holder with a composite structure and adjustable outer diameter, featuring a two-stage switch mechanism and a ball-and-groove system for easy bit replacement, allowing for a compact design that fits within the nose cone of power screwdrivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a spring quick-release structure is used, then the bit can be quickly replaced, but the outer diameter becomes much larger than that of the plug-in bit holder, so it cannot be used with the nose cone
Solution Approach 1:
The bit holder is divided into multiple functional segments: a plug-in section for fitting into the nose cone, a quick-release section with ball-and-groove mechanism for bit replacement, and a bit holding section. This segmentation allows each part to be optimized independently, enabling quick release functionality without increasing the overall outer diameter that would prevent nose cone compatibility.
Solution Approach 2:
The quick-release mechanism components are nested within the bit holder structure. The ball-and-groove system is integrated inside the bit holder body, with the ball hidden within a groove when not in use. This nesting approach allows the quick-release function to be embedded within the compact plug-in bit holder design, maintaining small outer diameter while providing rapid bit replacement capability.
2Length of stationary object
If a plug-in bit holder is used, then the outer diameter can be kept small for nose cone compatibility, but the bit is difficult to remove and replace directly by hand
Solution Approach 1:
The bit holder design enables self-service bit replacement through the automatic ball-and-groove quick-release mechanism. When the user applies slight pressure or inserts a tool, the ball automatically moves from the groove to release the bit, eliminating the need for complex manual manipulation or additional tools. This self-service mechanism provides easy bit replacement while maintaining compact dimensions for nose cone compatibility.
3Ease of operation
If a spring quick-release structure is used, then the bit can be quickly replaced, but the user must continue to press the spring to replace the bit holder, which causes inconvenience
Solution Approach 1:
The complex continuous pressing operation required by spring mechanisms is extracted and replaced with a simple ball-and-groove engagement/disengagement system. The ball is taken out of the groove during bit replacement, providing a clear, simple mechanical action that requires minimal continuous force and eliminates the inconvenience of maintaining spring pressure throughout the replacement process.
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
Enables convenient and efficient bit replacement with a compact design that maintains stability and prevents loosening, enhancing user experience and reducing manufacturing costs.
Implementation Method 1
a compressible ring provided therein
Data Source
AI summary
This invention relates to a quick release bit holder, which includes at least a main body and a sleeve. A first rod provided at the rear end of said main body, a second rod provided at the front end of said main body, and said second rod successively provided with a first outer surrounding, a second outer surrounding and a third outer surrounding from back to front. The outer diameter of said first outer surrounding is larger than the outer diameter of said second outer surrounding, and the outer diameter of said second outer surrounding is larger than the outer diameter of said third outer surrounding. A plurality of ball holes provided around said third outer surrounding, a ball arranged in each ball hole, a first annular groove provided at the front end of said third outer surrounding, a compressible ring provided therein. Said sleeve mounted at the front end of said main body, an first inner surrounding provided at the inner rear end of said sleeve, a second inner surrounding provided at the inner front end of said sleeve, and the inner diameter of said first inner surrounding is larger than the inner diameter of said second inner surrounding. An M-shaped groove provided at the front end of said second inner surrounding, a first blocking surrounding provided behind said M-shaped groove.