Cassette Lever Mechanism for Sheet Size Adjustment
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Solution Overview
Problem
Existing sheet feed cassettes require manipulation of multiple parts to adjust the size, making it cumbersome for users to slide in or out the extendable section, necessitating the need for a simpler adjustment mechanism.
Innovation Solution
A cassette design featuring a lever portion that can be shifted to a tilted posture to release engagement, allowing for sliding in one direction to extend or contract the cassette size through a series of manipulation actions on the lever portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lock button mechanism is used to secure the cassette extendable section, then the cassette can be locked in position, but the user must manipulate multiple parts (lock button and extendable section) to adjust the size
Solution Approach 1:
The patent combines the lock button and the extendable section into a single integrated lever component. This merging allows the user to perform both locking and sliding operations through a single manipulation action, eliminating the need to separately manipulate multiple parts while maintaining reliable locking through the engagement hole and protrusion mechanism
2Device complexity
If the lock button is separate from the extendable section, then the locking mechanism is independent, but the user requires multiple manipulation steps to adjust cassette size
Solution Approach 1:
The patent merges the lock button functionality directly into the extendable section, creating a unified lever structure. This integration maintains the independence of the locking mechanism through separate engagement holes and protrusions, while simultaneously reducing adjustment time by allowing users to slide and lock the cassette in a single continuous motion
Data Source
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AI summary
A cassette (1) includes first and second sheet accommodation sections (3) and (5), and a restricting section (7). The second sheet accommodation section (5) is slidably attached to the first sheet accommodation section (3). The restricting section (7) includes first and second engagement sections (38a) and (78a), and a manipulation section (70). The first engagement section (38a) is disposed in the first sheet accommodation section (3). The manipulation section (70) is disposed in the second sheet accommodation section (5). The second engagement section (78a) engages with the first engagement section (38a). A lever portion (71) of the manipulation section (70) is shiftable from a lying down posture to a tilted posture. The second engagement section (78a) is disposed in the lever portion (71). Shift of the lever portion (71) from the lying down posture to the tilted posture releases engagement between the first engagement section (38a) and the second engagement section (78a), and allows the lever portion (71) to be pulled in a first direction (A1) to slide the second sheet accommodation section (5) and extend a size of the cassette (1).