Rolling Utility Knife With Adjustable Circular Blade
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Solution Overview
Problem
Prior utility knives lack accuracy and consistency in making long straight cuts, and inexperienced users often apply inconsistent pressure, leading to waste and poor workmanship.
Innovation Solution
A rolling utility knife with a pair of frame rails, front and rear rollers, a circular blade that rotates along the edge of the rails, and a lever mechanism allowing vertical adjustment of the blade, ensuring consistent pressure and straight cuts, along with optional attachments for enhanced precision and versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed blade utility knife is used, then the device is simple and easy to operate, but the cutting accuracy and consistency deteriorate
Solution Approach 1:
The blade is replaced with a circular cutting element that rotates along the outside edge of the frame rail, transforming the static fixed blade into a dynamic rotating cutter. This dynamic mechanism enables consistent cutting depth and straighter cuts while maintaining a relatively simple overall structure through the use of rollers and frame rails.
2Manufacturing precision
If manual pressure control is used by inexperienced users, then the operation is simple, but the cutting consistency deteriorates
Solution Approach 1:
The device performs its own pressure regulation function through the mechanical interaction between the circular blade, frame rails, and material being cut. The structure automatically maintains consistent cutting pressure without requiring the user to manually control force, thereby achieving consistent cuts while remaining easy to operate.
3Manufacturing precision
If a standard fixed blade knife is used, then the device is simple, but the ability to make long straight cuts deteriorates
Solution Approach 1:
The cutting device is segmented into distinct functional components: frame rails that provide guidance, rollers that enable movement along the material, and a circular blade that performs cutting. This segmentation allows each component to perform its specific function optimally, resulting in accurate long straight cuts while keeping the overall device structure manageable.
Solution Approach 2:
The cutting mechanism transitions from a single-point contact fixed blade to a circular blade rotating along a linear path defined by the frame rail. This dimensional change from point contact to linear path contact enables consistent straight cutting over long distances while maintaining structural simplicity through the roller-supported frame.
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 rolling utility knife provides improved accuracy and consistency in cutting, reducing waste and enabling efficient long straight cuts, while the adjustable mechanism ensures consistent pressure application, enhancing user efficiency and workmanship.
Implementation Method 1
a spring configured to keep the circular blade in an up position when the utility rolling knife is not placed on the planar surface
Implementation Method 2
A lever is secured to an inside edge of the first rail by a fulcrum, where the circular blade is secured to a first end of the lever and the blade is adjustable to move vertically relative to the first rail. Also, a pin is disposed at a second end of the lever, where the pin is configured to cause the circular blade to move downward when the rolling utility knife is placed on a planar surface.
Data Source
AI summary
A rolling utility knife is disclosed. The rolling utility knife includes a pair of frame rails and at least one cross-member connecting the pair of frame rails. In addition, the rolling utility knife includes a front roller and a rear roller disposed between the frame rails. A circular blade is adapted to rotate along an outside edge of a first rail of the pair of frame rails. The rolling utility knife further includes a lever secured to an inside edge of the first rail by a fulcrum, where the circular blade secured to a first end of the lever and the blade is adjustable to move vertically relative to the first rail. A pin is disposed at a second end of the lever, where the pin is configured to cause the circular blade to move downward when the rolling utility knife is placed on a planar surface.