Developing Cartridge Guiding Part Resolves Press Member Snagging

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Solution Overview

Problem

The existing technology for attaching and detaching developing cartridges from an image forming apparatus often results in the press member entering the path of the developing cartridge, causing snagging issues and difficulty in attachment due to the spring's continuous urging even after detachment.

Innovation Solution

The developing cartridge includes a pressed part with a positioning part that contacts and positions the press member, and a guiding part that moves the press member against the urging force when attached, ensuring proper alignment and reducing snagging during attachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the spring member continuously urges the press member toward the developing cartridge even after detachment, then the press member can be positioned correctly when attached, but the press member enters the region where the developing cartridge passes through causing snagging

Engineering Contradiction:

Improvepositioning accuracy of press memberVSAvoidattachment ease of developing cartridge

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The guiding part performs a preliminary action by moving the press member against the urging force of the spring member during the attachment process. This preliminary positioning ensures that when the developing cartridge is fully attached, the press member is already in the correct position, preventing it from entering the cartridge's path and causing snagging.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system transitions from a static spring-urged position to a dynamic controlled movement. The guiding part enables the press member to move dynamically during attachment, first against the spring force to clear the cartridge path, then allowing the spring to urge it into the final positioned state, resolving the contradiction between positioning accuracy and attachment ease.

Inventive Principle:

Principle #15Dynamics

2Force

If the press member is positioned by spring urging in a attached state, then proper contact pressure is achieved, but the press member obstructs the developing cartridge path during attachment

Engineering Contradiction:

Improvecontact pressure of press memberVSAvoidattachment process smoothness

Core Design Contradiction:

ForceVSEase of operation

Solution Approach 1:

The guiding part performs a preliminary action by moving the press member against the spring's urging force during attachment. This ensures the press member clears the developing cartridge's path before the spring can exert its full contact pressure, eliminating obstruction while maintaining proper force application when attached.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The guiding part acts as a cushioning mechanism during attachment, temporarily overcoming the spring's urging force to prevent the press member from obstructing the cartridge path. This beforehand action ensures smooth attachment while preserving the necessary contact pressure for proper operation once attached.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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

This configuration facilitates easier attachment of the developing cartridge by ensuring the press member is correctly positioned, reducing the likelihood of snagging and improving usability.

Implementation Method 1

the press member is urged toward the positioning part by an urging member

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS10095180B2Developing cartridge which is movable toward and away from image bearing member

Publication Date: 2018.10.09 CANON KK

AI summary

Disclosed is a developing cartridge in which a developer bearing member moves when a pressed part is pressed by a press member provided in a main body of an apparatus to move a developing frame in a state in which the developing cartridge is attached to the main body of the apparatus. The pressed part is provided with a positioning part that contacts and positions the press member. The press member is urged toward the positioning part by an urging member. The developing frame has a guiding part that moves the press member against an urging force of the urging member when the developing cartridge is attached to the main body of the apparatus.