Printer Process Unit Handgrip Segmentation for Stability
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Solution Overview
Problem
Conventional color laser printers experience frontward falling due to imbalance when the unit holding photosensitive drums is largely pulled out for detachment, causing instability and potential device fall.
Innovation Solution
The design incorporates a process unit with a rearward-positioned back side handgrip and a near side handgrip that maintain the center of gravity within the device, preventing imbalance by ensuring the rear end remains in the main casing during pull-out, allowing stable detachment and reattachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the drum unit is largely pulled out frontward for detachment, then the back side hand grip portion becomes accessible for the user, but the center of gravity displaces frontward causing frontward falling of the printer
Solution Approach 1:
The hand grip portion is divided into two separate grips: a front side hand grip and a back side hand grip. This segmentation allows users to pull the drum unit to different extents depending on their needs - they can access the back side grip without completely detaching the unit, thus maintaining printer stability while still achieving the desired accessibility.
2Ease of operation
If the drum unit is completely removed from the main casing, then full access is achieved, but the printer becomes unstable and may fall forward
Solution Approach 1:
The hand grip portion is designed to be dynamically accessible at different stages of drum unit extraction. Users can interact with the back side hand grip during partial extraction without needing to fully remove the unit, allowing flexible access while maintaining system stability throughout the operation.
Data Source
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AI summary
An image forming device includes: a main casing; and a process unit including: a plurality of cartridges arrayed side by side and defining an array direction; and a support unit supporting the plurality of cartridges and movable in the array direction relative to the main casing between an accommodated position where the support unit is accommodated in the main casing and a pulled out position where the support unit is moved away from the accommodated position for detachment and attachment of the support unit from and to the main casing. The support unit includes: a frame; a first handgrip including a leg portion having a connected portion connected to the frame, and a grip portion connected to the leg portion and positioned downstream of a most upstream end of a most upstream side cartridge in a pulling out direction along the array direction for pulling out the support unit in a state where the support unit is at the accommodated position; and a second hand grip positioned downstream of the first hand grip in the pulling out direction.