Paper dispensing device
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Solution Overview
Problem
Conventional paper dispensers with integrated cutters often result in torn or jagged edges and excessive paper waste due to the need for a large mechanism to link the spindle and cutter, making downsizing difficult.
Innovation Solution
A paper dispensing device with a main spindle, axle, and cutting member that rotate synchronously, featuring a blade with guiding elements housed in ring grooves, allowing the blade to extend or retract seamlessly through a slot opening to cut paper as it is dispensed, minimizing waste and enabling a more compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a linked cutter mechanism is used to cut paper, then paper cutting function is achieved, but the mechanism takes up space and makes downsizing difficult
Solution Approach 1:
The cutting member is merged with the spindle structure, where the blade is integrated into the spindle body and rotates synchronously with it. This eliminates the need for separate linked cutter mechanisms and reduces the overall dispenser size while maintaining the paper cutting function.
Solution Approach 2:
The spindle serves multiple functions: it holds the paper roll, rotates to dispense paper, and simultaneously acts as the cutting mechanism through the integrated blade. This multi-functionality eliminates the need for dedicated cutter components, reducing space requirements.
2Device complexity
If paper is torn or cut manually, then no additional mechanism is needed, but paper edges become jagged and waste increases
Solution Approach 1:
The system performs its own cutting function automatically through the synchronized rotation of the blade with the spindle. The blade self-cuts the paper at the desired length without requiring external cutting mechanisms or manual intervention, providing clean edges while maintaining simplicity.
3Ease of operation
If the blade is stationary and paper is dragged to it, then cutting is achieved, but paper is often longer than needed causing waste
Solution Approach 1:
The blade is made dynamic by synchronizing its rotation with the spindle rotation. This allows the blade to actively engage with the paper at the precise moment and position needed, enabling accurate cutting at the desired length and reducing paper waste compared to stationary blade designs.
Data Source
AI summary
The paper dispensing device includes a main spindle, an axle, two end pieces, and a cutting member. The main spindle has a compartment. The axle is rotatably supported inside the compartment. The end pieces are positioned adjacent to the two ends of the axle, respectively. Each end piece has an eccentric opening through which an end of the axle is threaded. A ring groove is configured around the eccentric opening along an inner side of each end piece. The cutting member includes a blade, a cutter axle, two arms extended outward slantwise from the cutter axle's two ends, and two guiding elements at the arms' outer ends moveably housed in the ring grooves, respectively. As the main spindle spins, the cutting member rotates along with the main spindle and its blade is extended out or retracted into the compartment as the guiding elements move along the ring grooves.