Transfer Device Operating Member for Latent Image Bearer Detachment

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Solution Overview

Problem

Existing image forming apparatuses face challenges in safely and efficiently attaching and detaching latent image bearer units, such as photoconductors, without risking damage to components like the intermediate transfer belt and sensors, due to interference and improper detachment mechanisms.

Innovation Solution

A transfer device with a movable component, moving assembly, restrictor, and operating member is introduced, allowing the latent image bearer unit to be securely attached and detached by moving the component towards and away from the unit, and releasing the restrictor to facilitate safe detachment, preventing interference and damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a mechanism is provided to move components away from the latent image bearer unit for detachment, then the ease of operation is improved, but the device complexity increases

Engineering Contradiction:
Improveease of detachmentVSAvoidmechanism complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent combines the movable component positioning mechanism and the detachable unit restriction mechanism into a single integrated operating member. When the operating member is operated, it simultaneously moves the movable component away from the latent image bearer unit and releases the restrictor to allow detachment, eliminating the need for separate mechanisms and reducing overall device complexity.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The operating member serves multiple functions: it controls the movable component's position relative to the latent image bearer unit and simultaneously controls the restrictor's engagement state. This multi-functional design reduces the number of separate components needed, improving ease of operation without proportionally increasing device complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Productivity

If the movable component is positioned close to the latent image bearer unit, then the productivity is improved, but the object-affected harmful factors increase

Engineering Contradiction:
Improveimage formation efficiencyVSAvoidcomponent interference
Core Design Contradiction:
ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent employs a movable component that can dynamically change its position relative to the latent image bearer unit. During image formation, the movable component is positioned close to the latent image bearer unit to ensure proper image formation. When detachment is required, the operating member moves the movable component away, preventing interference with the detachable unit. This dynamic positioning resolves the contradiction between productivity and harmful factors.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The operating member acts as an intermediary mechanism that coordinates the positions of both the movable component and the restrictor. By controlling both elements through a single operating member, the system ensures that the movable component is properly positioned during operation and automatically repositioned when detachment is initiated, preventing harmful interference while maintaining productivity.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS12189318B2Transfer device and image forming apparatus
Publication Date: 2025.01.07 RICOH CO LTD
  • US12189318B2 patent drawing
  • US12189318B2 patent drawing
  • US12189318B2 patent drawing

AI summary

A transfer device includes a movable component, a moving assembly, a restrictor, and an operating member. The movable component moves toward and away from a latent image bearer unit. The moving assembly causes the movable component to move toward and away from the latent image bearer unit. The restrictor restricts the latent image bearer unit from detaching from an image forming apparatus. The operating member causes the moving assembly to move the movable component away from the latent image bearer unit and releases restriction of detachment of the latent image bearer unit from the image forming apparatus by the restrictor.