Removable Drawer Stopper for Laser Printer Ease of Operation
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Solution Overview
Problem
Tandem-style color laser printers face difficulties in easily inserting or removing heavy drawers due to increased load on support portions, which can make the device larger if support portions are relocated further back to reduce this load.
Innovation Solution
The design includes a drawer with a projecting portion and support portions that engage with guiding walls to regulate movement during installation and withdrawal, allowing for reduced load on support portions and preventing device size increase by positioning support portions farther back.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If support portions are located closer to the rear to reduce load, then ease of operation improves, but device size increases
Solution Approach 1:
The patent introduces a vertical dimension to the support structure by adding a stopper that extends upward from the guide. This vertical element allows the support portions to be positioned farther back (improving ease of operation) without requiring the device to extend backward (avoiding size increase), as the stopper provides the necessary structural support in the vertical direction rather than requiring horizontal extension.
2Ease of operation
If support portions are located farther back to reduce friction, then ease of operation improves, but device size increases
Solution Approach 1:
The stopper extends in the vertical direction (upward) rather than requiring horizontal extension. This allows support portions to be positioned farther back to reduce friction during drawer movement, while the overall device footprint remains compact because the structural support is achieved through vertical rather than horizontal dimensioning.
3Adaptability or versatility
If drawer is made heavier to include more components, then functionality improves, but ease of operation deteriorates
Solution Approach 1:
The stopper acts as an intermediary mechanical element between the drawer and the device frame. It provides a fulcrum point that creates mechanical advantage, allowing heavy drawers with more components to be inserted and removed with less effort. The stopper mediates the interaction between the user and the heavy drawer, reducing the effective force needed through leverage.
Data Source
AI summary
An image forming device includes a casing having a guide, image forming portions configured to form images on a recording medium, and a drawer configured to be installed in and withdrawn from the casing along the guide in a first direction for installation and in a second direction for withdrawal opposite the first direction. The drawer may include a housing configured to house each image forming portion, a projecting portion coupled to the housing and protruding in the first direction, and a support portion coupled to the projecting portion. An engagement of the support portion with the guide regulates movement of the drawer upward or downward during installation and withdrawal.