Cartridge Detection via Toothless Gear Inclined Surface
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Solution Overview
Problem
Existing electrophotographic image forming apparatuses face challenges in accurately detecting and recognizing new cartridges during replacement, leading to potential misidentification and inefficient operation.
Innovation Solution
The development of a cartridge configuration that includes a toothless gear and detection member with specific displacement parts and a toner cap design, allowing for stable detection and recognition through a mechanism involving inclined surfaces and sliding parts to ensure proper alignment and movement of detection components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a detection member is provided to enable the printer to recognize a new cartridge, then the reliability of cartridge recognition is improved, but the device complexity increases due to additional components such as toothless gear, slide parts, and inclined surfaces
Solution Approach 1:
The detection member is pre-positioned on the toothless gear such that when the gear rotates from its initial position, the detection member automatically moves along the inclined surface to engage with the actuator. This preliminary positioning eliminates the need for separate actuation mechanisms, resolving the contradiction by enabling reliable detection through a self-activating design that minimizes additional components.
Solution Approach 2:
The toothless gear with detection member serves dual functions: it transmits rotational motion from the agitator gear while simultaneously enabling cartridge recognition through the detection member's automatic engagement with the actuator via the inclined surface. This self-service mechanism resolves the contradiction by integrating detection functionality into the existing gear system without requiring separate complex detection apparatus.
2Measurement precision
If the detection member is positioned to accurately detect new cartridges, then the measurement precision is improved, but the device complexity increases due to the need for specific inclined surfaces and slide parts
Solution Approach 1:
The inclined surface on the toothless gear provides a curved geometric path that guides the detection member's movement. When the gear rotates, the detection member smoothly transitions along this curved surface to engage with the actuator at a precise position. This curved geometry resolves the contradiction by achieving accurate detection positioning through geometric design rather than complex mechanical guidance structures.
3Volume of moving object
If the cartridge structure is optimized for compact design, then the volume is reduced, but the ease of manufacture worsens due to the complex interaction between toothless gear, slide parts, and detection member
Solution Approach 1:
The detection member is integrated directly onto the toothless gear, combining two previously separate components into one unified structure. This merging eliminates the need for separate mounting mechanisms and reduces the overall number of parts, resolving the contradiction by achieving compact cartridge design through component integration while simplifying the manufacturing process through reduced part count and assembly steps.
Solution Approach 2:
The toothless gear serves multiple functions: it transmits rotational motion from the agitator gear, supports the detection member, and provides the inclined surface for automatic engagement with the actuator. This multi-functionality resolves the contradiction by consolidating several functions into a single component, reducing cartridge volume while maintaining manufacturability through a versatile, multi-purpose part.
Data Source
Figure 1
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Figure 3A~3B
AI summary
A cartridge including a housing, a driving receiving part, a rotary member configured to rotate, and move in an axis direction thereof while rotating, and a detected member configured to move in the axis direction by receiving a driving force from the rotary member, wherein the rotary member includes a main body part having a first surface facing the detected member in the axis direction and a second surface positioned at an opposite side of the first surface in the axis direction, an operating part arranged on the first surface and configured to apply a force for moving the detected member in the axis direction to the detected member, and an operated part arranged on the second surface and configured to receive a force for moving the main body part in the axis direction.