Sliding Cover Hand Tool with Stationary Driving Head Connection
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Solution Overview
Problem
Existing hand tools, such as multi-functional bicycle tool sets, suffer from non-stationary connections between the tool body and socket, leading to slippage and potential damage, and have low structure strength due to easily deformable pivot connections under high torque.
Innovation Solution
A hand tool design featuring a handle with perpendicular driving recesses and a cover member made of different materials, along with a driving head that provides a stationary connection through alternative engagement into the recesses, enhancing structural integrity and preventing slippage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the socket is pivotally connected to the tool body by a screw, nut and bolt, then the tool can be assembled, but the connection is easily deformed under high torque, resulting in low structure strength
Solution Approach 1:
The connection structure is divided into separate components: a connection piece with a connection hole in the tool body, and a connection rod with a connection head in the socket. This segmentation allows for a more robust connection mechanism that resists deformation under torque.
Solution Approach 2:
The connection piece and connection rod are pre-assembled in a specific configuration before final assembly. The connection hole and connection head are positioned to engage precisely, ensuring proper alignment and maximum structural strength before the tool is put into service.
2Adaptability or versatility
If the tool body and socket are connected pivotally, then the socket can be positioned at various angles, but the nonstationary connection causes the tool to slip from hands easily
Solution Approach 1:
The connection between the tool body and socket transitions from a completely pivotable dynamic connection to a semi-stationary connection. The connection piece and connection rod provide a fixed positional relationship while still allowing for the necessary angular adjustment, creating a stable platform that reduces slippage.
3Ease of operation
If the connection between tool body and socket is made stationary, then slippage is prevented, but the tool cannot be adjusted to various angles
Solution Approach 1:
The connection system is segmented into the connection piece, connection rod, and connection head, allowing for modular adjustment. This segmentation enables the socket to be positioned at various angles while maintaining a stable connection, as each component can be independently positioned and secured.
Data Source
AI summary
A hand tool includes a handle and a driving head. The handle includes a first driving recess, a second driving recess disposed opposite to the first driving recess, a body made of a first material, and a cover member mounted around an outer surface of the body and made of a second material different from the first material. The handle further includes a first receiving recess therein. The driving head includes a connection portion alternatively engaged into one of the first driving recess and the second driving recess to provide a stationary connection between the handle and the driving head.