Rotating Blade Holder Structure for Cutter-to-Scraper Utility Knives
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Solution Overview
Problem
Existing multi-functional knives have complicated structures and are inconvenient to operate, requiring separate tools for cutting and scraping functions, leading to inefficiency and inconvenience for users.
Innovation Solution
A multi-functional knife with a compact design that allows the blade holder to be positioned at multiple angles through guide rails, enabling it to function as both a cutter and a scraper without additional accessories, and includes a safety assembly to prevent accidental rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multi-functional knife is designed to transform between cutter knife and scraper knife, then the versatility is improved, but the structure becomes complicated and operation becomes inconvenient
Solution Approach 1:
The knife blade is designed to perform multiple functions (cutting and scraping) by changing its orientation relative to the handle axis. The blade can be positioned at different angles (0° for cutting, 90° for scraping) to serve different purposes, eliminating the need for separate tools while maintaining a simple single-blade structure.
Solution Approach 2:
The blade holder is made rotatable relative to the handle, allowing dynamic adjustment of the blade angle. This rotational mechanism enables the user to switch between cutting and scraping functions by simply rotating the blade holder to the desired angle, providing versatility without adding complex mechanical structures.
2Reliability
If separate cutter knife and scraper knife are used, then each tool's function is specialized, but the user needs to purchase, store, and carry multiple tools which is inconvenient
Solution Approach 1:
A single knife tool is designed to replace both cutter knife and scraper knife by enabling the blade to be positioned at different angles. The blade can be oriented at 0° for cutting operations and 90° for scraping operations, providing functional specialization within a single tool that is easier to carry and store.
3Productivity
If the blade holder can be positioned at multiple angles, then the working efficiency is improved, but the structure becomes more complex
Solution Approach 1:
The blade holder is designed with rotational capability to adjust the blade angle dynamically. This simple rotational mechanism allows quick positioning at multiple angles (0°, 90°, and intermediate positions) to optimize for different tasks, improving working efficiency without requiring complex mechanical systems.
Data Source
AI summary
A multi-functional knife is provided, including: a housing provided with an accommodating cavity and an opening, where the opening is provided at a front end of the housing; a blade holder configured to hold a blade and removably accommodated in the accommodating cavity; a first guide assembly including a first guide rail and a drive member which is drivably connected to a front side of the blade holder to cause the blade holder to move along the first guide rail; and a second guide assembly including a fixed surface and a second guide rail provided on the fixed surface. A rear side of the blade holder is pivotally connected to the second guide rail to cause the blade holder to move along the second guide rail.