Single Sensor Detects Developing Component Presence and Type
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Solution Overview
Problem
Existing image forming apparatuses require multiple sensors to detect the presence and type of replacement developing components, increasing manufacturing costs and complexity.
Innovation Solution
Incorporating a development sensor that outputs different levels based on contact with a rotary member and operating member, allowing a single sensor to determine if a new replacement developing component is fitted and present, without the need for additional sensors or storage devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors are used to detect the presence and type of replacement developing components, then the detection accuracy is improved, but the manufacturing cost and device complexity increase
Solution Approach 1:
The development sensor is designed to perform multiple detection functions using a single sensor element. It detects both the presence of the replacement developing component and its type (new or used) by evaluating different output levels from the same sensor, eliminating the need for multiple dedicated sensors
Solution Approach 2:
The patent combines multiple detection functions into a single development sensor. The sensor integrates the capability to detect component presence and component type by analyzing different output levels, merging what would traditionally require separate sensing elements into one unified sensor
2Measurement precision
If multiple sensors are used to detect the presence and type of replacement developing components, then the detection accuracy is improved, but the manufacturing cost increases
Solution Approach 1:
The development sensor serves multiple detection purposes simultaneously - detecting both the presence and type of the replacement developing component. This multi-functionality reduces the total sensor count, thereby lowering manufacturing costs while maintaining high detection accuracy
Solution Approach 2:
By merging multiple detection functions into a single sensor, the patent reduces the bill of materials and assembly complexity, directly reducing manufacturing costs while achieving accurate detection of both presence and type
3Device complexity
If a single sensor is used to detect both presence and type of replacement developing components, then the device complexity is reduced, but the measurement precision may be compromised
Solution Approach 1:
The development sensor achieves multi-functionality by detecting different output levels corresponding to different component states. The sensor maintains high measurement precision by distinguishing between multiple output levels (first level for new component, second level for used component), proving that single-sensor multi-functionality need not compromise accuracy
Data Source
AI summary
An image forming apparatus includes an accommodating portion, a motor, and a development sensor. In the accommodating portion, a replacement developing component is fitted. The replacement developing component is fitted with a rotary member including an operating member, and stores toner. The motor rotates the rotary member on the replacement developing component fitted in the accommodating portion. When a new replacement developing component is fitted, the development sensor is not in contact with the operating member before the motor rotates the rotary member and is in contact with the operating member on the rotary member that has moved as the motor rotates. The development sensor outputs a first level when in contact with the operating member and outputs a second level when not in contact with the operating member.