Sheet Guide Mechanism for Printing Apparatus

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Solution Overview

Problem

Existing printing apparatuses require significant operational effort to set up and manage sheet media, involving multiple steps for moving guide portions and covering mechanisms, which increases the workload during medium setup and handling.

Innovation Solution

A sheet guide mechanism that includes a movable guide portion sandwiched between a reception and guide portion, with a cover that engages and disengages to facilitate easy insertion and removal of the sheet medium, utilizing biasing members to assist in positioning the guide portion and regulating surfaces to manage sheet movement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a guide portion is made movable to enable sheet medium insertion and removal, then ease of operation is improved, but device complexity increases due to additional engagement portions and biasing members

Engineering Contradiction:

Improveease of sheet medium insertion and removalVSAvoidcomplexity of guide portion mechanism

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The guide portion automatically moves between guide position and open position through the interaction of the biasing member and engagement portions. When the cover is opened or closed, the engagement portions interact to trigger the guide portion's movement without requiring separate manual operation, making the system self-serving and reducing operational steps.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The functions of the cover (protecting the sheet medium) and the guide portion (guiding and positioning the sheet medium) are merged through the engagement mechanism. The cover's opening/closing motion is coupled with the guide portion's movement, so that a single operation accomplishes both protective coverage and guide positioning, reducing the number of separate operations required.

Inventive Principle:

Principle #5Merging (Combining)

2Manufacturing precision

If multiple operational steps are required for setting the sheet medium, then manufacturing precision can be maintained, but loss of time increases due to prolonged setup procedure

Engineering Contradiction:

Improveprecision of sheet medium positioningVSAvoidtime required for sheet medium setup

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The guide portion is pre-positioned in the guide position through the biasing member's continuous biasing force, ready to receive and guide the sheet medium immediately when the cover is opened. This preliminary positioning eliminates the need for additional adjustment steps during sheet medium setup, reducing setup time while maintaining positioning precision.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The biasing member continuously maintains the guide portion in the guide position, ensuring that the guiding function is always active and ready. This continuous action eliminates interruptions or idle steps in the sheet medium handling process, allowing seamless insertion and removal operations without compromising positioning accuracy.

Inventive Principle:

Principle #20Continuity of useful 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 solution significantly reduces the workload for setting and removing sheet media by simplifying the operational steps, allowing for efficient guidance and handling of the sheet medium while maintaining stable transport and positioning.

Implementation Method 1

a biasing member configured to bias the guide portion toward the open position

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS11254531B2Sheet guide mechanism and printing apparatus

Publication Date: 2022.02.22 SEIKO EPSON CORP

AI summary

While a cover moves to a closed position, a second engagement portion contacts a first engagement portion to displace the first engagement portion, and thus a guide portion moves to a guide position. While the cover moves from the closed position to a first open position, the second engagement portion and the first engagement portion are separated, and the guide portion moves from the guide position to an open position.