Quick-Release Bit Holder With Ball Retention for Nose Cone Fit
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Solution Overview
Problem
Existing bit holders for power screwdrivers are difficult to remove and replace, especially those with a quick-release mechanism, and often cause inconvenience due to their size or require additional tools, and they may loosen over time.
Innovation Solution
A quick-release bit holder with a composite structure and adjustable outer diameter, featuring a two-stage switch mechanism and ball-holding system for secure attachment and easy removal, using materials like ferromagnetic and non-ferromagnetic components to enhance stability and reduce manufacturing costs.
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 and cannot be used with the nose cone
Solution Approach 1:
The patent extracts the spring from the quick-release structure and replaces it with a elastic deformation mechanism of the holder body itself. The holder uses its own material elasticity to provide the quick-release function, eliminating the need for a separate spring component that would increase the outer diameter.
Solution Approach 2:
The patent employs a nested structure where the bit is inserted into the holder body, and the holder itself provides the elastic retention mechanism. The bit holder integrates multiple functions within a compact nested arrangement, allowing quick release without increasing overall dimensions.
2Volume of moving object
If a plug-in bit holder is used, then it fits within the nose cone, but it is difficult to remove and replace by hand
Solution Approach 1:
The holder body is designed with self-service elastic deformation capability. When lateral force is applied to the bit, the holder body automatically deforms elastically to release the bit, eliminating the need for external tools or clips. The structure serves itself by using its own material properties for the release mechanism.
3Productivity
If a traditional quick-release structure with spring is used, then bit replacement is fast, but the user must continuously press the spring causing inconvenience
Solution Approach 1:
The holder body automatically releases the bit through its own elastic deformation when lateral force is applied. The structure does not require continuous user pressure on a spring mechanism. Instead, the elastic material itself provides the release function passively, improving operational convenience while maintaining productivity.
4Volume of moving object
If the bit holder uses a compact design, then it fits the nose cone, but the quick-release function becomes difficult to implement
Solution Approach 1:
The patent utilizes composite material properties, combining elastic material characteristics with the structural requirements of a compact holder. The elastic deformation capability is inherent to the material composition, allowing the compact design to achieve quick-release function without adding mechanical complexity.
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 plurality of balls arranged individually in each ball hole, and a first limit position member provided at the front end of said third outer surrounding. 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. A first annular groove provided at said second inner surrounding, an circlip provided in said first annular groove, said circlip clamped the third outer surrounding of said main body and moved thereon.