Screwdriver Bit Auxiliary Sheath Positioning Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional screwdriver bit structures with auxiliary positioning features lack independent rotation capability and efficient recognition, leading to potential offsetting and coming off during use.
Innovation Solution
A screwdriver bit structure comprising a circular cylinder with a driving portion and a fitting portion, combined with an auxiliary sheath featuring a protruding ring that can be buckled into a concave ring groove, allowing for stable positioning and rotation without shaking, preventing offsetting and coming off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the protruding ring section is integrated with the screwdriver bit through consolidation, then the recognition function is achieved, but the independent rotation capability is lost
Solution Approach 1:
The auxiliary positioning section is segmented into separate components: the screwdriver bit and the auxiliary sheath. The auxiliary sheath can rotate independently relative to the screwdriver bit, allowing the bit to maintain rotation capability while the sheath provides positioning guidance. This segmentation resolves the contradiction by enabling both integration benefits and independent motion.
Solution Approach 2:
The auxiliary sheath is designed with dynamic rotation capability around the screwdriver bit. The sheath can rotate independently to provide positioning guidance during the initial insertion phase, then can be locked or held in position once the bit is properly inserted. This dynamic behavior allows the system to transition between different operational states.
2Reliability
If the protruding ring section is made to closely cover the shaft through plastic injection, then firm integration is achieved, but the independent rotation is prevented
Solution Approach 1:
The auxiliary positioning section is divided into separate components rather than being molded as a single integrated piece. The auxiliary sheath surrounds the screwdriver bit but maintains independent rotational capability, providing firm positioning guidance while allowing the bit to rotate freely during insertion and operation.
Solution Approach 2:
The auxiliary sheath acts as an intermediary component between the user's hand and the screwdriver bit. It provides tactile feedback and positioning guidance during insertion, then can be held stationary while the bit rotates, mediating between the need for firm integration and independent rotation.
3Device complexity
If the auxiliary positioning section is designed for recognition purpose only, then manufacturing is simplified, but positioning accuracy during rotation is insufficient
Solution Approach 1:
The auxiliary positioning function is separated from the main screwdriver bit structure into a distinct auxiliary sheath component. This segmentation allows the sheath to be optimized specifically for positioning accuracy with features like ridges, grooves, or asymmetric shapes, while the bit itself maintains its simple rotational structure for driving screws.
Solution Approach 2:
The auxiliary sheath is designed with localized positioning features at specific locations along its length. These features provide tactile guidance and prevent misalignment during insertion, while the rest of the sheath structure remains simple. This local quality approach enhances positioning accuracy without significantly increasing overall device complexity.
Data Source
AI summary
A screwdriver bit structure having auxiliary positioning function includes a screwdriver bit of which one end is a circular cylinder and having a driving portion that is any one of a slotted type, a cross type and a polygon type. Another end of the circular cylinder is a fitting portion that is buckled to the screwdriver bar. The features of the invention are that the circular cylinder has a concave ring groove near the front of the driving portion. An auxiliary sheath is a long tube body that has a tube hole. The internal diameter of the tube hole is slightly larger than the periphery of the circular cylinder. A protruding ring is disposed to an internal wall of the tube hole. Accordingly, the tube hole of the auxiliary sheath can cover the periphery of the circular cylinder to allow the screwdriver bit to achieve the absolute positioning.