Swinging Rack Paper Jam Detection Mechanism
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Solution Overview
Problem
Existing paper discharging mechanisms fail to detect paper jams effectively in self-service terminals when dealing with hard or thick paper, leading to disrupted paper delivery and delayed alarm notifications.
Innovation Solution
A paper discharging mechanism featuring a swinging rack with a conveying roller assembly, a first drive assembly, and a detection assembly that swings away from the paper outlet when blocked, utilizing a sensor and detection part to detect the position change and trigger an alarm, even with high-hardness or thick paper.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional sensor-based paper jam detection mechanism is used, then paper jams can be detected for soft or thin paper, but the mechanism fails to detect paper jams when hard or thick paper is used
Solution Approach 1:
The patent employs a dynamic swinging rack mechanism that can change its position based on paper delivery status. The rack swings between a first position (normal paper delivery) and a second position (paper jam detection), allowing the system to adapt its detection method based on the actual paper condition rather than relying on a fixed sensor that fails with hard/thick paper
Solution Approach 2:
The patent replaces the traditional sensor-based detection system with a mechanical swinging rack system. Instead of using sensors to detect paper jams (which fail with hard/thick paper), the system uses the physical movement and positioning of the swinging rack to detect and indicate paper jam conditions through mechanical action
2Loss of information
If the paper outlet is blocked by hard or thick paper, then the paper stacks in the passage causing undetected jams, but the detection mechanism cannot sense the blockage
Solution Approach 1:
The patent implements a feedback mechanism where the swinging rack's position provides continuous information about paper delivery status. When paper jams occur, the rack swings to a different position, providing feedback about the abnormal condition that triggers alarm signals, ensuring timely detection of paper jams that would otherwise go unnoticed
3Device complexity
If a fixed paper delivery passage is used, then the structure is simple, but hard or thick paper cannot be effectively detected when blocking the passage
Solution Approach 1:
The patent introduces a dynamic swinging rack that can move between different positions based on paper delivery conditions. This dynamic element adds controlled complexity to the structure, enabling reliable detection of paper jams by hard/thick paper while maintaining overall structural simplicity through the use of a single movable component rather than multiple complex sensors
Data Source
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AI summary
Disclosed are a paper discharging mechanism and printing device having the same. The paper discharging mechanism includes: a frame (7) provided with a paper outlet (731) thereon; a swinging rack (1), configured to be swingable relative to the frame (7); a conveying roller assembly (2) provided on the swinging rack (1); a first drive assembly (5), which is in a transmission connection with the conveying roller assembly (2) and configured to drive the same to deliver a paper to the paper outlet (731); a first detection assembly (41), configured to detect a position of the swinging rack (1) relative to the frame (7); the swinging rack (1) swings in a direction away from the paper outlet (731) when the paper outlet (731) is blocked. The paper discharging mechanism can detect a paper jam timely and effectively even if the paper is of greater hardness or thickness.