Utility Cutter Non-Tool Blade Changer Mechanism
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Solution Overview
Problem
Existing blade and anvil type cutting tools are cumbersome, require multiple parts or tools for razor blade replacement, and often have bulky designs that increase cost and size, while also posing safety risks due to loose blades during removal.
Innovation Solution
A blade and anvil type cutting tool with a non-tool blade changing mechanism using an O-ring and screw assembly that allows for easy blade removal by pivoting the handles beyond a first open position, and a sliding spring-biased detent storage tray within the handle grip cover for razor blades, eliminating the need for tools and reducing tool complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If prior art blade changing mechanisms are used, then razor blades can be replaced, but the mechanisms are too cumbersome and require tools or vigorous shaking which can cause injury
Solution Approach 1:
The blade holder is segmented into a main body and a movable clamp assembly that can be independently actuated. The clamp assembly includes a clamp member that can be moved along the blade holder to release the blade, separating the blade retention function from the blade release function. This allows simple one-handed operation without requiring complex mechanisms or tools.
Solution Approach 2:
The blade release mechanism is designed to be self-operating by the user's natural gripping and squeezing action. When the user closes the handles, the blade holder is forced against the anvil, which automatically releases the clamp member from the latching slot, causing the blade to be ejected. This eliminates the need for separate release tools or complex mechanisms.
2Adaptability or versatility
If blade storage compartments are incorporated into the utility cutting device body, then replacement blades can be stored, but the device size and cost increase
Solution Approach 1:
The blade storage compartment is nested within the existing handle structure of the utility cutter. The compartment is formed by utilizing the internal cavity of the handle, and the compartment cover serves dual purposes as both a closure for the storage compartment and as part of the handle assembly. This nested design allows blade storage without significantly increasing the overall device volume.
Solution Approach 2:
The handle structure serves multiple functions: it provides the gripping surface for the user, contains the blade storage compartment, and houses the pivot mechanism for the blade holder. The compartment cover also serves as part of the handle assembly. This multi-functionality reduces the need for additional components and minimizes device size.
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
Enables easy and safe replacement of razor blades without tools, reduces tool complexity, and minimizes additional storage space within the cutting device, enhancing user safety and convenience.
Implementation Method 1
a spring element that allows the handles to be pivoted in a scissor movement action towards an open position
Implementation Method 2
an O-ring and screw assembly that allows for easy blade removal by pivoting the handles beyond a first open position
Data Source
AI summary
A multi-function blade-and-anvil type cutting tool that uses standard type razor blades includes a blade-and-anvil section connected to a first handle portion and a non-tool blade holder and a blade clamp assembly connected to a second handle portion. The standard blades are able to be changed with out tools when the first and second handle portions are moved from a first open position to a second open position to allow the blade holder and the clamp assembly to pivot with one another causing a screw and O-ring latch to move away from a latching slot in the second handle portion. This movement positions the razor blade between the screw and O-ring latch and a blade clamp guide element for easy removal. Each handle portion having a gripping cover disposed thereon. One of the handle portions has a sliding storage tray disposed therein for storing replacement razor blades.