Printer Support Unit Asymmetric Fixing Mechanism
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Solution Overview
Problem
Existing printing apparatuses with supporting units that are fixed to a base unit by inserting an insertion part up to a fixing position often face difficulties in releasing the fixation, especially when the supporting unit is set in a wrong orientation, leading to secure but hard-to-release configurations.
Innovation Solution
The printing apparatus incorporates a supporting unit with an indented part and a base unit featuring intersecting fixing parts, where the first fixing part engages with the indented part when correctly oriented and the second fixing part does not, allowing secure fixation while preventing difficulty in releasing the supporting unit even when incorrectly oriented.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the insertion part is fixed to the base unit when inserted up to the fixing position, then the supporting unit can be securely fixed, but difficulty in releasing the fixation occurs when the supporting unit is set in a wrong orientation
Solution Approach 1:
The fixing part is designed with asymmetric engagement features where the indented part on the insertion part can only engage with the first fixing part when the supporting unit is in the correct orientation. When incorrectly oriented, the indented part aligns with the second fixing part which has a different structure that prevents engagement, allowing easy release. This asymmetric design ensures secure fixation in correct orientation while enabling easy release in wrong orientation.
2Device complexity
If a simple fixing structure is used, then the device complexity is reduced, but the ability to differentiate between correct and wrong orientation is insufficient
Solution Approach 1:
The fixing part is segmented into two distinct fixing parts: a first fixing part designed to engage with the indented part of the insertion part, and a second fixing part with a different structure. This segmentation allows the system to provide different engagement characteristics for correct versus incorrect orientations, enabling orientation differentiation while maintaining relatively simple overall structure.
Data Source
AI summary
A printing apparatus includes a supporting unit for a medium including an insertion part on which an indented part is provided, a base unit including an insertion inlet for the insertion part, the base unit being configured to have the supporting unit attach and detach to/from the base unit, and a fixing part configured to, when the insertion part is inserted up to a fixing position, fix the insertion part at the fixing position. The fixing part includes a first fixing part and a second fixing part. When the insertion part is inserted up to the fixing position, the first fixing part is configured to engage with the indented part when the indented part is located at a facing position, and the second fixing part is configured to not engage with the indented part when the indented part is located at a facing position.