Utility Knife With Hinged Handle And Internal Blade Storage
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Solution Overview
Problem
Existing utility knives pose a safety risk due to exposed cutting edges, which can cause user injury, and lack a convenient method for storing replacement blades.
Innovation Solution
A utility knife design featuring a handle with a hinged connection allowing it to be opened and closed, incorporating guide notches for safe blade exposure and an internal storage cavity for replacement blades, with features like a retaining arm and magnetic closure to secure the blade in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cutting edge is exposed for cutting operations, then the cutting functionality is improved, but the safety risk to the user increases
Solution Approach 1:
The blade is segmented from the handle through a replaceable blade mechanism. The blade can be separated from the handle unit, allowing the cutting edge to be exposed only when needed for cutting operations. The guide notch system further segments the exposure path, allowing the cutting edge to be accessible only through a controlled opening rather than fully exposed.
Solution Approach 2:
The guide notch acts as an intermediary between the user and the cutting edge. It provides a controlled path that allows the cutting edge to be accessed for cutting while preventing direct contact with the user's fingers. The thumb rest serves as another intermediary, positioning the user's thumb away from the cutting edge during operation.
2Productivity
If the blade is fully exposed for cutting, then the cutting performance is improved, but the risk of user injury increases
Solution Approach 1:
The blade exposure is made dynamic rather than static. The blade can be inserted into or removed from the guide notch depending on the operational need. When not in use, the blade can be retracted or removed, dynamically adjusting the exposure level to minimize injury risk while maintaining cutting performance when needed.
3Device complexity
If no internal storage is provided, then the device complexity is reduced, but the convenience of blade replacement is worsened
Solution Approach 1:
The storage cavity is nested within the handle structure. The handle unit contains an internal cavity that can store one or more replacement blades. This nesting approach provides storage functionality without significantly increasing the external dimensions or complexity of the knife handle, allowing convenient storage of spare blades close to the working blade.
4Ease of operation
If the cutting edge is always accessible, then the ease of use is improved, but the safety protection is reduced
Solution Approach 1:
The guide notch provides localized access to the cutting edge only at the specific location where cutting is needed. Rather than making the entire blade accessible, only a small portion of the cutting edge is exposed through the guide notch opening. This localized access maintains ease of use for cutting while minimizing the overall exposure of the dangerous cutting edge to the user.
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
The design enhances user safety by minimizing contact with the cutting edge and allows for easy blade replacement, making the knife easier to use and more versatile across various applications.
Implementation Method 1
The one or more mating arrangements can include a magnet disposed on the inner surface of the second handle part
Data Source
AI summary
A utility knife and methods for using the same are disclosed. The utility knife includes a handle portion, a head unit attached to the handle portion, and a blade attached to the head unit. The handle portion is made of two parts jointed together by a hinged connection arrangement. A blade support component is also included which orients the blade in perpendicular relation to a central axis of the handle. The exemplary utility knife can safely be used in many applications with a design configured to help prevent user contact with the blade's cutting edge or edges.