Tool Member Fixing Device Non-Threaded Connector Oxidation
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Solution Overview
Problem
Conventional fixing devices for tool members, such as scrapers or saws, suffer from oxidation of threaded components due to moisture absorption, leading to the entire tool assembly needing replacement when only the tool member is damaged.
Innovation Solution
A fixing device with a handle, connector, and detaching member that uses a flexible rib and engaging unit to securely attach and detach the tool member, featuring a fixing unit with a protrusion and hole, and an abutting space with oblique surfaces to facilitate easy tool exchange without damaging the handle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a threaded fixing rod and threaded hole are used to fix the tool member to the handle body, then the tool member can be securely fixed, but the threaded structure oxidizes and damages when moisture is absorbed, requiring replacement of the entire tool assembly
Solution Approach 1:
The patent extracts the threaded structure from the fixing system and replaces it with a non-threaded fixing rod and corresponding hole. The fixing rod has a fixed diameter that fits into a pre-formed hole in the tool member, eliminating the threaded interface that was susceptible to oxidation and moisture damage.
Solution Approach 2:
The patent makes the tool member replaceable while keeping the handle body permanent. By eliminating the oxidation-prone threaded structure, the handle body's fixing mechanism becomes durable and reusable, while only the tool member needs replacement when damaged, effectively treating the fixing mechanism as a long-lasting component.
2Ease of repair
If a threaded fixing rod is used to attach the tool member, then the tool member can be securely fixed, but the entire tool assembly must be replaced when the tool member is damaged
Solution Approach 1:
The patent segments the tool assembly into two distinct parts: the permanent handle body with a non-threaded fixing mechanism, and the replaceable tool member. This segmentation allows the tool member to be independently replaced without affecting the handle body, improving ease of repair while maintaining fixing mechanism durability through the non-threaded design.
3Object-affected harmful factors
If a non-threaded fixing rod with fixed diameter is used instead of a threaded screw, then oxidation damage is prevented, but the fixing mechanism becomes simpler and may allow tool members to slip off
Solution Approach 1:
The patent applies preliminary action by pre-forming a recessed hole in the tool member that receives the fixing rod. This pre-formed hole ensures proper positioning and secure fit of the fixing rod, preventing the tool member from slipping off while maintaining the oxidation-resistant non-threaded design.
Solution Approach 2:
The patent introduces an intermediary element - a fixing nut or collar that fits over the fixing rod and secures it to the handle body. This intermediary component provides the necessary friction and mechanical interference to prevent slippage, while the fixing rod itself remains non-threaded and oxidation-resistant.
Data Source
AI summary
A fixing device for a tool member includes a handle having a receiving space opened at one end thereof for receiving a connector, the tool member having an operation head defined at one end thereof, a connecting end defined at another end of the tool member for connecting to the connector, the connector having two flat bodies which are pivoted with each other, a fixing unit defined between the two flat bodies for fixing the connecting end of the tool member to the connector, the connector having at least one engaging rib defined at one end thereof for engaging with a wall of the receiving space. Therefore, the tool member is easily detachable from the handle via the connector.