Printing Apparatus Head Unit Slide Rail Guide Mechanism

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Solution Overview

Problem

Large printing apparatuses require significant space and stability issues during the attachment and detachment of head units, making the process cumbersome and difficult, especially when installed at non-parallel angles or high positions.

Innovation Solution

A printing apparatus with a head unit that includes a connection plate with a slide rail for smooth sliding attachment and detachment, featuring engagement protrusions that guide the head unit along the rail, allowing for easy mounting and demounting without the need for extensive upper space and maintaining stability through positioning members.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the head unit is tilted and slid along a temporary table for installation, then the head unit can be mounted onto the set stage, but a large space is required on the upper side of the set stage and the device becomes large

Engineering Contradiction:
Improveease of head unit installationVSAvoidspace requirement
Core Design Contradiction:
Ease of manufactureVSArea of stationary object

Solution Approach 1:

The connection plate is divided into a first connection plate fixed to the set stage and a second connection plate attached to the head unit. These segmented connection plates with complementary guide surfaces enable direct mounting without requiring a large temporary table, thus reducing the space requirement while maintaining ease of installation.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Guide surfaces are introduced as intermediary elements between the set stage and the head unit. The first guide surface on the first connection plate and the second guide surface on the second connection plate work together to facilitate precise alignment and mounting, eliminating the need for a large temporary table and reducing overall device size.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If the operator holds handles to maintain tilted position during mounting, then the head unit can be stably attached and detached, but the operator needs to maintain an unstable position when installing at various angles or high positions

Engineering Contradiction:
Improvestability of attachment operationVSAvoidoperator stability
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The guide surfaces are pre-configured on both connection plates to automatically guide the head unit into the correct position during attachment. This preliminary positioning action eliminates the need for the operator to manually maintain tilted positions or hold handles, ensuring both stability and ease of operation even at various angles or high positions.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The connection plates with guide surfaces enable the head unit to self-align and self-position during attachment and detachment operations. The operator simply needs to guide the head unit along the guide surfaces, and the system automatically maintains proper alignment, improving both reliability and operator stability without requiring handles or complex positioning maneuvers.

Inventive Principle:
Principle #25Self-service

3Area of stationary object

If a sliding method is used to attach and detach the head unit, then the space requirement is reduced, but the head unit needs to be precisely guided along the attaching and detaching path

Engineering Contradiction:
Improvespace requirementVSAvoidguidance precision
Core Design Contradiction:
Area of stationary objectVSManufacturing precision

Solution Approach 1:

The guide surfaces are designed with specific local geometric properties - the first guide surface on the first connection plate and the second guide surface on the second connection plate have complementary shapes that precisely match each other. This local quality optimization ensures precise guidance along the attaching and detaching path while maintaining a compact device structure with reduced space requirements.

Inventive Principle:
Principle #3Local quality

Data Source

PatentUS9259948B2Printing apparatus
Publication Date: 2016.02.16 SEIKO EPSON CORP
  • US9259948B2 patent drawing
  • US9259948B2 patent drawing
  • US9259948B2 patent drawing

AI summary

A printing apparatus including a head unit in which a print head is mounted on a head plate, and a small carriage that holds the head unit. The head unit engages with a slide rail formed in the small carriage with an engagement protrusion, and can be attached and detached in a sliding manner when the head unit is attached and detached.