Sheet Feed Device Dual Transmission Idling Mechanism
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Solution Overview
Problem
Existing sheet feed devices often experience erroneous sheet feeding due to the lack of a mechanism to selectively switch between feeding from multiple trays using a single motor, leading to potential misalignment and incorrect sheet selection.
Innovation Solution
A sheet feed device is designed with a motor that can rotate in two directions, utilizing a dual transmitting mechanism with idling mechanisms to allow selective feeding from either tray by changing the rotational direction, ensuring accurate sheet feeding by allowing idle rotations to release pressure and prevent simultaneous feeding from both trays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single motor is used to feed sheets from multiple trays, then device complexity is reduced, but erroneous sheet feeding occurs due to inability to selectively switch between trays
Solution Approach 1:
The patent applies dynamics by making the transmitting mechanisms movable rather than fixed. The first and second transmitting mechanisms can selectively engage or disengage from the motor based on rotation direction, allowing the system to dynamically switch between feeding from the first tray or second tray using a single motor, thereby preventing erroneous simultaneous feeding while reducing device complexity
Solution Approach 2:
The patent uses idling mechanisms as intermediaries between the motor and the transmitting mechanisms. These idling mechanisms act as mediators that allow the motor to rotate in different directions while preventing direct simultaneous engagement of both transmitting mechanisms, thus ensuring selective sheet feeding from either tray without requiring multiple motors
2Adaptability or versatility
If the motor rotates in both directions to select trays, then adaptability is improved, but simultaneous feeding from both trays may occur causing errors
Solution Approach 1:
The transmitting mechanisms are designed to dynamically respond to motor rotation direction. When the motor rotates in the first direction, only the first transmitting mechanism engages; when rotating in the second direction, only the second transmitting mechanism engages. This dynamic engagement based on rotation direction enables tray selection while preventing simultaneous feeding
Solution Approach 2:
The idling mechanisms provide preliminary anti-action by allowing the motor to rotate in the opposite direction without immediately engaging the corresponding transmitting mechanism. This prevents the harmful effect of simultaneous engagement by creating a buffer zone during direction transitions, ensuring that only one tray feeds at a time
Data Source
AI summary
A sheet feed device includes a motor that rotates in a first and second direction, a first transmitting mechanism having an upstream and a downstream portion, that transmits a rotational force in a first transmitting direction, a second transmitting mechanism having an upstream and downstream portion, that transmits the rotational force in a second transmitting direction, a first idling mechanism, and a second idling mechanism. When the motor transitions between rotating in the first direction and rotating in the second direction, the first idling mechanism allows the upstream portion of the first transmitting mechanism to perform an idle rotation with respect to the downstream portion of the first transmitting mechanism, and the second idling mechanism is configured to allow the upstream portion of the second transmitting mechanism to perform an idle rotation with respect to the downstream portion of the second transmitting mechanism.