Blade Rotation Center Inversion for Cutter Biting Prevention
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Solution Overview
Problem
Existing printing apparatus cutters face issues with biting (locking) between fixed and moving blades due to sharp blade edges, leading to potential malfunction and inefficiency in cutting operations.
Innovation Solution
A printing apparatus design where the rotation center of the second blade is positioned on the first blade side, allowing the second blade to rotate away from the first blade when a force is applied, preventing biting and enabling sharper blade edges for effective cutting, with a support mechanism that biases the second blade for optimal contact during cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the blade edge is made sharp to improve cutting performance, then cutting ability is improved, but the risk of biting (locking) between blades increases
Solution Approach 1:
The patent inverts the conventional blade configuration by positioning the rotation center on the first blade side rather than the second blade side. This inversion changes the rotational direction when force is applied, causing the second blade to rotate away from the first blade instead of toward it, thereby preventing biting while maintaining sharp edges for effective cutting
2Reliability
If the blade edge is tapered to prevent biting, then reliability is improved, but cutting performance deteriorates
Solution Approach 1:
By inverting the rotation center position to the first blade side, the patent eliminates the need for tapered blade edges. The inverted configuration naturally prevents biting through rotational movement away from contact, allowing the use of sharp, non-tapered edges that maintain superior cutting performance
3Stability of the object's composition
If the rotation center is positioned on the second blade side (conventional design), then blade contact is maintained, but biting occurs when force is applied
Solution Approach 1:
The patent inverts the rotation center position from the conventional second blade side to the first blade side. This inversion fundamentally changes the blade interaction dynamics: when force is applied during cutting, the second blade rotates away from the first blade instead of toward it, preventing biting while maintaining stable contact during normal operation
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
This configuration prevents biting between the blades, allows for sharper edges for better cutting performance, and enables the apparatus to be used in two orientations, enhancing convenience and cutting reliability.
Implementation Method 1
a rotational moment acts on the second blade in a direction away from the first blade
Implementation Method 2
the second blade be biased in a direction in which the second blade is in contact with the first blade
Implementation Method 3
cuts a printing medium by causing a moving blade to be in frictional contact with a fixed blade
Data Source
AI summary
A printing apparatus includes a cutter. The cutter includes a first blade and a second blade, and cuts a printing medium by causing the first blade to be in frictional contact with the rotatable second blade to be moved, in which a rotation center of the second blade is disposed on a first blade side with respect to a moving surface of the first blade.