Sheet Feed Device Link Mechanism for Miniaturization
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Solution Overview
Problem
Conventional sheet feed devices are complex due to a large number of components and rotating shafts, making them bulky and difficult to miniaturize.
Innovation Solution
A simplified sheet feed device design using a tray receiver, lever, link, pressure tray, engagement mechanism, spring, and correcting section, with a reduced number of rotating shafts and components, allowing for easier assembly and miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional sheet feed device design is used, then sheet handling function is achieved, but device complexity increases and miniaturization becomes difficult
Solution Approach 1:
The patent combines multiple functions into fewer components. The link member integrates both the function of moving the pressure tray and engaging with the tray receiver, eliminating the need for separate mechanisms. The engagement mechanism merges the locking and positioning functions into a single integrated structure, reducing the overall number of parts and rotating shafts required.
Solution Approach 2:
The link member serves multiple purposes: it acts as a lever to move the pressure tray, an engagement component to interact with the tray receiver, and a structural connector. This multi-functionality reduces the need for dedicated components for each function, thereby simplifying the overall mechanism and enabling miniaturization.
2Device complexity
If the number of components is reduced, then device complexity decreases and miniaturization is enabled, but manufacturing precision requirements may increase
Solution Approach 1:
The engagement interface between the link member and tray receiver is designed with specific geometric features (protrusions and recesses) that concentrate the precision requirements at critical localized points rather than distributing them throughout the entire mechanism. This allows for simplified overall manufacturing while maintaining high precision where needed for proper engagement.
Solution Approach 2:
Instead of designing complex adjustment mechanisms to achieve proper engagement, the patent inverts the approach by designing the engagement features to self-align and self-adjust through their geometric configuration. The protrusion and recess shapes are designed to guide proper positioning during assembly, reducing the need for high-precision manufacturing across all components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The simplified design reduces the number of components and rotating shafts, enabling a more compact and efficient sheet feed mechanism while maintaining effective sheet handling and alignment.
Implementation Method 1
a spring arranged at the tray receiver, and movable in the approached position in which the pressure tray approaches the tray receiver and in the separated position in which the pressure tray is separated from the tray receiver
Data Source
AI summary
A sheet feed device comprises a main body section, a support section, a first link, a second link, an engagement mechanism, an energization section and a correcting section. The correcting section is movable in an approaching position at which the support section approaches the main body section against energization force of the energization section while being contactable with the second link in a direction in which the first link moves to a downstream side in the conveyance direction, and is movable in a separation position at which the support section is separated from the main body section while being separable from the second link in a direction in which the first link moves to an upstream side in the conveyance direction.