Peeling Member Deflection Control in Image Carrier Cartridge

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Solution Overview

Problem

The existing sheet peeling mechanism for image carriers, such as photosensitive drums, is prone to deflection away from the carrier, leading to a deterioration in the peeling function due to the elongated wall design, which causes the peeling member to separate from the image carrier.

Innovation Solution

A cartridge configuration that includes a pressing portion on the second frame to elastically deform and move the peeling member closer to the image carrier, with the pressing portion positioned at the center of the axis direction to stabilize the peeling member and prevent deflection, and an engaging portion to facilitate attachment and balance the force applied.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the wall is made elongated in the axis direction of the image carrier, then the structure can be simplified, but the wall becomes liable to deflection causing the peeling member to separate from the image carrier

Engineering Contradiction:

Improvewall structureVSAvoidpeeling function

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent applies local quality by providing a pressing portion at a specific location (center in axis direction) of the second frame to locally counteract the deflection of the elongated wall. This targeted approach maintains the overall structural simplicity while addressing the specific deflection issue at the critical location where the peeling member contacts the image carrier.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The pressing portion acts as an intermediary element between the second frame and the peeling member. It mediates the deflection problem by applying a counteracting force through elastic deformation of the second wall portion, ensuring the peeling member maintains proper contact with the image carrier without requiring the wall to be non-elongated.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Stability of the object's composition

If the peeling member is positioned away from the image carrier, then the wall deflection is minimized, but the peeling function deteriorates

Engineering Contradiction:

Improvewall position stabilityVSAvoidpeeling function

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The patent utilizes parameter changes by employing elastic deformation of the second wall portion as a mechanism to adjust the position of the peeling member. The pressing portion changes the physical state of the wall portion from a rigid structure to an elastically deformable element, allowing dynamic adjustment to maintain optimal peeling contact while accommodating wall deflection.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If the pressing portion is provided at the center in the axis direction, then the deflection of the second wall portion is most effectively suppressed, but the manufacturing precision requirements increase

Engineering Contradiction:

Improvepeeling member contact stabilityVSAvoidpressing portion position accuracy

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent applies partial action by providing the pressing portion only at the center in the axis direction, which is the most critical location for suppressing wall deflection. This targeted approach concentrates the pressing function where it is most needed rather than distributing it uniformly, achieving effective deflection suppression with minimal additional manufacturing complexity.

Inventive Principle:

Principle #16Partial or excessive action

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 effectively suppresses the separation of the peeling member from the image carrier, ensuring reliable sheet peeling and maintaining peeling efficiency even when the sheet is attached to the surface, while also simplifying the manufacturing process and allowing for optimal peeling member placement.

Implementation Method 1

move the peeling portion closer to the image carrier by pressing and elastically deforming the second wall portion

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS8737873B2Cartridge having peeling member configured to peel off sheet from image carrier

Publication Date: 2014.05.27 BROTHER KOGYO KK

AI summary

There is provided a cartridge including an image carrier, a first frame, a second frame, a peeling member and a pressing portion. The first frame has a pair of first wall portions rotatably supporting the image carrier and a second wall portion extending along an axis direction of the image carrier to connect the pair of first wall portions. The second frame is attached to the first frame so as to cover the image carrier. The peeling member has a peeling portion projecting from the second wall portion toward the image carrier and being configured to peel off a sheet from the image carrier by the peeling portion. The pressing portion is provided to the second frame, which is configured to move the peeling portion closer to the image carrier by pressing and elastically deforming the second wall portion.