Feeding Device Cam Rotation Resistance for Noise Reduction
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Solution Overview
Problem
The existing feeding devices in image forming apparatuses generate collision noise when the feeding roller is lowered onto stacked materials due to the lack of resistance during the cam's second rotation, leading to collisions with the materials.
Innovation Solution
A feeding device is designed with a cam that performs first rotation while in contact with a mounting member, an elastic member to lower the feeding roller, and an applying unit that applies rotation resistance to the cam during its second rotation, thereby reducing noise by controlling the feeding roller's descent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cam performs second rotation without resistance to lower the feeding roller, then the feeding roller can be lowered to the stacked portion, but collision noise is generated when the feeding roller collides with the materials
Solution Approach 1:
The applying unit applies rotation resistance to the cam during its second rotation before the feeding roller makes contact with the stacked materials. This preliminary resistance action prevents the feeding roller from descending too rapidly and colliding with the materials, thereby suppressing collision noise while still enabling the feeding roller to be lowered to the stacked portion.
2Object-generated harmful factors
If the cam performs second rotation with resistance to suppress collision noise, then collision noise is reduced, but the feeding roller may not be lowered effectively
Solution Approach 1:
The applying unit is configured to apply rotation resistance to the cam during its second rotation in a dynamic manner. The resistance is applied selectively during the rotation period when the feeding roller is being lowered, allowing controlled descent that suppresses collision noise while maintaining effective lowering functionality.
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 solution effectively suppresses collision noise by applying resistance to the cam during its reverse rotation, ensuring a controlled and quiet operation of the feeding roller onto the stacked materials.
Implementation Method 1
an elastic member that lowers the raised feeding roller to the stacked portion while causing the cam which is in contact with the mounting member to perform second rotation with an elastic force acting on the mounting member
Data Source
AI summary
A feeding device includes a stacked portion on which materials to be fed are stacked, a feeding roller that feeds the materials to be fed stacked on the stacked portion, a cam that performs first rotation in a state of being in contact with a mounting member on which the feeding roller is mounted and raises the feeding roller, an elastic member that lowers the raised feeding roller to the stacked portion while causing the cam that is in contact with the mounting member to perform second rotation with an elastic force acting on the mounting member, and an applying unit that applies a rotation resistance to the cam performing the second rotation.