Universal Screw Head Geometry for Multi-Bit Torque Transfer
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Solution Overview
Problem
Existing screws require multiple screwdrivers or bits to accommodate different screw heads, such as slotted, Phillips, Torx, or Allen, limiting versatility and requiring a separate tool for each type.
Innovation Solution
A screw head design that accommodates various screwdrivers or bits, including slotted, disposable slotted, Phillips, Torx, internal square, internal hexagon, Torq set, and Pozidriv, with optimized contact surfaces and dimensions allowing use with standardized screwdrivers or bits, even smaller sizes, by incorporating a specific geometry and casting compound process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screw head is designed with a specific standard geometry (e.g., Torx, Phillips, Allen), then the screw can be screwed with a dedicated screwdriver for that standard, but the screw cannot be used with screwdrivers of other standards
Solution Approach 1:
The screw head is designed with a universal geometry that can accommodate multiple screwdriver standards (Torx, Phillips, Allen, Pozidriv, slotted) simultaneously. The specific geometric parameters (a, b, c, d, e, f, g, h, i, m, n, o, p, q, u, y) are optimized to provide suitable contact surfaces for torque transfer with each of these different screwdriver types, making the screw head multi-functional and compatible with various standards without requiring separate screw heads for each standard.
2Adaptability or versatility
If a screw head is designed to accommodate multiple screwdriver standards, then the versatility is improved, but the contact surface area for each screwdriver type is reduced
Solution Approach 1:
The screw head geometry is designed with locally optimized contact surfaces for each screwdriver type. The specific dimensions (a, b, c, d, e, f, g, h, i, m, n, o, p, q, u, y) create different zones within the screw head that provide appropriate contact areas for Torx, Phillips, Allen, Pozidriv, and slotted screwdrivers. Each zone is locally adapted to maximize contact surface area for its corresponding screwdriver type while maintaining overall compatibility with multiple standards.
Data Source
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AI summary
The invention relates to a screw comprising an associated screwdriver or bit, wherein the screw head is designed in such a way that for any screwdrivers or bits, specifically comprising a slotted head, one-way slotted head, cross head (Phillips), torx, internal square (Robertson), internal hexagon (Inbus), torq-set, Pozidrive or tightener, sufficient contact surfaces are provided in order to transmit the torque from the screwdriver or bit to the screw head.