Rotary Handle Hand Tool with Spring-Locked Barrel
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Solution Overview
Problem
Conventional hand tools with fixed directions or rotary handles face limitations in flexibility and space constraints, requiring tool replacement or significant handle separation for directional changes, which is inconvenient, especially in constrained environments.
Innovation Solution
A hand tool design featuring a first and second handle with oblique faces, a rotating locking set including an annular seat, locking barrel, and a button set with a spring and locking lever, allowing the second handle to rotate relative to the first by pressing a button, releasing the locking barrel's blocking mechanism, enabling adjustable angles without the need for handle separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hand tool uses a fixed direction design, then the structure is simple and stable, but the adaptability to different directions and constrained spaces is poor
Solution Approach 1:
The patent applies the dynamics principle by transforming the fixed handle structure into a rotatable handle structure. The second handle can rotate relative to the first handle around the longitudinal axis of the first handle, allowing the tool to adapt to different directions and constrained spaces. This dynamic adjustment capability resolves the contradiction by enabling directional adaptability while maintaining a relatively simple overall structure through the use of a rotatable joint mechanism.
2Adaptability or versatility
If a hand tool with rotary handle allows handle rotation, then the adaptability to different directions is improved, but the space required for handle separation increases
Solution Approach 1:
The patent implements a rotatable joint mechanism where the second handle can rotate relative to the first handle around its longitudinal axis. This dynamic rotation capability allows the handle to change direction without requiring significant separation distance between handles, thus resolving the contradiction between directional flexibility and space requirements.
Solution Approach 2:
The rotatable joint mechanism is integrated within the compact structure of the handle assembly. The rotation mechanism is nested within the existing handle geometry, allowing the second handle to rotate without requiring external space for handle separation, thereby maintaining compact dimensions while achieving directional adaptability.
3Ease of operation
If a hand tool with rotary handle uses spring-based locking mechanism, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The patent employs a spring-based locking mechanism that automatically locks and unlocks the rotatable handle. The spring automatically engages locking grooves on the first handle with corresponding features on the second handle during rotation, providing self-service locking without requiring additional manual intervention. This resolves the contradiction by enabling easy operation through automatic spring-driven locking while keeping the mechanism relatively simple.
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
Enhances user convenience by allowing the second handle to rotate relative to the first at specific angles, improving usability in constrained spaces without the need for tool replacement or extensive handle separation, thus addressing the limitations of existing hand tools.
Implementation Method 1
The spring is arranged in the first handle and elastically abuts against the locking lever. The locking lever is elastically pushed by the spring to move from the insertion hole into the at least one locking groove
Data Source
AI summary
A hand tool includes a first handle, a second handle, a rotating locking set and a button set. The first and second handles include oblique faces respectively. The rotating locking set includes an annular seat arranged in the first handle, a locking barrel passing the annular seat and rotatable relative to the annular seat, and a locking block. The locking barrel includes an insertion hole and at least one locking groove communicating with each other. One end of the locking block is fixed on the second handle, and the other end of the locking block is combined with the locking barrel. The button set is disposed on the first handle and includes a button exposed from the first handle, a locking lever, and a spring. The locking lever is connected with the button and extends into the insertion hole. The spring is arranged in the first handle.