Torque-Based Waste Toner Detection Mechanism
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Solution Overview
Problem
Conventional waste toner detection mechanisms are inadequate in accurately detecting the full state of waste toner in containers due to increased size requirements and inability to handle varying toner heights, leading to errors and unsuitability for large-capacity containers and reuse.
Innovation Solution
A waste toner detection mechanism utilizing a rotation transmission member and a stirring shaft, where a transmission member moves between farthest and closest positions based on torque differences, elastically engaging to restrict movement, and a flag member is exposed to indicate full state, allowing accurate detection and reuse of containers without size increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a floating member is used to detect waste toner level, then the detection mechanism can indicate full state, but the size of the waste toner container is increased
Solution Approach 1:
The patent extracts the detection function from a separate floating member and integrates it into the stirring shaft assembly. The stirring shaft itself becomes the detection element, eliminating the need for an additional floating member and reducing container size while maintaining detection accuracy.
Solution Approach 2:
The stirring shaft is given dual functionality: it both stirs the waste toner and detects the full state. By making the stirring shaft multi-functional, the patent eliminates redundant components and reduces the overall container size while maintaining reliable detection capability.
2Reliability
If a floating member is used to detect waste toner level, then the mechanism can indicate full state, but accurate detection of the entire waste toner container is difficult due to non-uniform height
Solution Approach 1:
The patent replaces the mechanical floating member detection system with a torque-based detection system. The stirring shaft's rotational torque changes as waste toner accumulates, providing an accurate measurement of the actual toner amount regardless of surface height variations, enabling precise detection throughout the entire container.
3Reliability
If spring force is used to maintain full state display, then the light shielding portion continues to display full state, but it is difficult to cope with large torque in large-capacity containers
Solution Approach 1:
The patent changes the detection parameter from spring force to rotational torque. The detection mechanism responds to torque variations caused by waste toner accumulation, which can accommodate large-capacity containers without requiring excessive spring force, thus maintaining display stability while handling larger torque values.
4Reliability
If a flag member with spring bias is used, then the full state is held on the waste toner container side, but the mechanism is not suitable for reuse of the waste toner container
Solution Approach 1:
The patent extracts the spring biasing mechanism from the detection system and replaces it with a torque-based detection method. This eliminates the mechanical constraints that prevented container reuse, allowing the waste toner container to be easily replaced and reused while maintaining reliable detection functionality.
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
Enables accurate detection of waste toner full state based on torque, facilitating container reuse and reducing errors, while maintaining operational efficiency and compact design.
Implementation Method 1
moves from the farthest position to the closest position with an increase of difference in rotation between the rotation transmission member and the stirring shaft
Implementation Method 2
The transmission member has a locking portion that is elastically engaged with the rotation transmission member in the closest position and restricts the transmission member from moving to the farthest position
Data Source
AI summary
A waste toner detection mechanism includes a transmission member and a flag member. The transmission member transmits the rotation of a rotation transmission member to a stirring shaft. The transmission member can move between the farthest position and the closest position to the rotation transmission member in the axial direction of the stirring shaft and moves from the farthest position to the closest position with an increase in difference in rotation between the rotation transmission member and the stirring shaft. The transmission member has a locking portion elastically engaged with the rotation transmission member in the closest position and restricts movement of the transmission member to the farthest position. The flag member moves from a retracting position of being stored in the waste toner container to an exposing position of being exposed from the waste toner container with the transmission member moving from the farthest position to the closest position.