Paper Dispenser Spare Roll Release to Prevent Jamming
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Solution Overview
Problem
Existing paper dispensers face issues with jamming and refilling challenges due to the mismatch between the reserve roll's diameter and the dispenser's receiving space, as well as the irregular dimensions of paper rolls, which prevent smooth operation and efficient refilling.
Innovation Solution
A movable scanning element is used to detect the reduced diameter of the reserve roll, allowing the blocking mechanism to release and enable the roll to move down, ensuring smooth operation and efficient refilling by converting the pivoting movement into a linear or sliding motion to unlock the blocking means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the receiving space width is reduced to smaller than the reserve roll diameter, then height is reduced and space is made available for additional components, but the roll may jam when moving up or down
Solution Approach 1:
The blocking means is activated in advance to prevent the reserve roll from moving into the receiving space when its diameter is still too large. This preliminary blocking action avoids subsequent jamming issues by ensuring the roll only moves when its diameter has reduced sufficiently, maintaining reliable operation while utilizing the compact housing design.
Solution Approach 2:
The scanning element continuously monitors the diameter of the reserve roll and provides feedback to the blocking means. When the diameter reduces to an appropriate size, the scanning element triggers the blocking means to release, allowing the roll to move. This feedback mechanism ensures reliable roll movement while maintaining the reduced housing volume.
2Ease of operation
If the blocking means releases when the diameter of the reserve roll is reduced below the width of the constriction, then the roll can move down smoothly, but a scanning element is required to detect the diameter reduction
Solution Approach 1:
The scanning element utilizes the existing rotational movement of the reserve roll as it unwinds to automatically detect when the diameter has reduced sufficiently. The roll's own rotation serves the dual purpose of paper dispensing and diameter monitoring, eliminating the need for separate complex detection mechanisms and enabling smooth automatic operation.
Solution Approach 2:
The scanning element serves multiple functions: it monitors the reserve roll diameter, triggers the blocking means release timing, and works in conjunction with the roll's rotational movement. This multi-functionality achieves smooth roll movement while minimizing the addition of separate detection devices, balancing operational ease with device complexity.
3Ease of operation
If the paper rolls are allowed to move freely in the guideway, then refilling is easier, but the rolls may jam due to irregular dimensions and elliptical cross-sections
Solution Approach 1:
The blocking means is positioned in advance within the guideway to prevent irregular rolls from moving freely. By actively blocking movement until the roll diameter is appropriate, the system prevents potential jamming caused by elliptical cross-sections or dimensional irregularities, while still allowing easy refilling through the lid when conditions are right.
Solution Approach 2:
The system prepares for potential jamming by having the blocking means ready to restrict roll movement. When a roll is inserted, the blocking means remains active until the scanning element confirms the diameter is suitable, preventing jamming before it can occur. This preliminary protective action maintains reliability while preserving refilling capability through the lid.
Data Source
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AI summary
The invention relates to a paper dispenser which comprises a receiving compartment (16) for a dispenser roll (17), a transport path (11) leading from above into the receiving compartment (16), a hold position for a spare roll (13) being defined in said transport path by a blocking means (9), and a transfer device for the paper of the spare roll (13) once the paper of the dispenser roll (17) is used up. The width (B) of the receiving compartment (16) is smaller than the diameter of the spare roll (13), and a sensor element (15) for the diameter of the spare roll (13) releases the blocking means (9) not before the diameter of the spare roll (13) has been reduced to the width (B) of the receiving compartment (16).