Paper Roll Dispenser Brake Synchronization
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Solution Overview
Problem
Existing paper dispensers in gaming terminals face issues with excessive paper unwinding due to inertia, leading to accumulation or blocking, which is difficult to manage and can damage the paper when trying to introduce the brake mechanism.
Innovation Solution
A paper dispenser design with a movable brake that transitions between inactive and braking positions synchronized with the actuating element, allowing easy roll insertion and controlled braking when the motor stops, avoiding direct interaction until the roll is fully seated and reducing unnecessary paper unwinding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a brake is added to prevent excessive paper unwinding, then paper accumulation and blocking are reduced, but the insertion of the paper roll becomes difficult and may damage the paper
Solution Approach 1:
The brake is designed to move between an inactive position (during roll insertion) and an active braking position (during operation). This dynamic positioning allows the brake to be out of the way during insertion while engaging properly during paper feed, resolving the contradiction between easy insertion and effective braking.
Solution Approach 2:
The brake is pre-positioned in the inactive position before roll insertion, allowing the operator to insert the roll without obstruction. After insertion, the brake automatically transitions to the correct position for operation, eliminating the need for manual adjustment and preventing paper damage during insertion.
2Reliability
If the brake is pressed with sufficient force to be effective, then paper unwinding control improves, but the force required to insert the roll increases
Solution Approach 1:
The brake's pressing force is dynamically applied only when needed. During roll insertion, the brake is in the inactive position exerting no force on the roll. During operation, the brake automatically engages and applies the necessary braking force to control paper unwinding, thus achieving effective braking without requiring high insertion force.
3Productivity
If the brake remains engaged during roll insertion, then braking is ready, but the operator must force the roll against the brake causing paper damage
Solution Approach 1:
The brake is pre-positioned in the inactive state, ready to engage but not yet applying force. This preliminary positioning allows the roll to be inserted freely without resistance. Once insertion is complete, the brake automatically transitions to the active state, providing braking readiness without having hindered the insertion process or damaged the paper.
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 design prevents excessive paper unwinding by engaging the brake only when necessary, reducing paper damage and simplifying the insertion process while maintaining effective braking to manage inertia.
Implementation Method 1
the brake may interact with the paper roll to slow it down
Implementation Method 2
the inertia of the rapidly driven and potentially jerky roll, can cause excessive paper unwinding when the drive stops
Data Source
Figure 1~3
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Figure 12~15
AI summary
A paper dispenser for paper wound in roll form. This dispenser comprises a housing (5) for holding a roll of paper, and an actuation element, for example a cover (6), movable between an open position allowing the roll to be inserted into the housing (5), and a closed position, in which it covers the roll. It further includes a brake (10) movable between, on the one hand, an inactive position it occupies when the cover (6) is open, and in which it allows the roll to be inserted into its housing (5), and on the other hand, a braking position in which it can interact with the roll when the cover (6) is closed. The movement of the brake (10) between its inactive position and its braking position is controlled by the movement of the cover (6) between its open and closed positions. The invention also relates to a game terminal and printer equipped with such a dispenser.