Driving Force Transmission Apparatus with Biasing Member
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Solution Overview
Problem
Conventional driving force transmission apparatuses in image forming devices face issues with incomplete disengagement of the driving force transmission member from the driving gear, leading to potential collisions and noise due to backlash and reverse rotation of the driven gear, which complicates the stopping of driving force transmission.
Innovation Solution
A driving force transmission apparatus with a biasing member that ensures the driving force transmission member is reliably disengaged from the driving member, using a combination of levers and springs to control engagement and disengagement, preventing collisions and noise by ensuring complete retraction of the transmission member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the abutting member moves to contact and lock the driving force transmission member to stop driving force transmission, then the driving force transmission is stopped, but the transmission member may not be sufficiently retracted from the driving gear due to load on the driven gear, leading to potential collision noise
Solution Approach 1:
The biasing member applies a preliminary separating force to the driving force transmission member in the direction away from the driving gear. This preliminary anti-action counteracts the load on the driven gear that prevents sufficient retraction, ensuring the transmission member is reliably separated before the abutting member locks it, thus preventing collision noise while maintaining stopping reliability
Solution Approach 2:
The biasing member changes the positional parameter of the driving force transmission member by applying a continuous separating force. This parameter change ensures the transmission member maintains sufficient clearance from the driving gear, preventing the collision noise that occurs when the member is not fully retracted
2Reliability
If the driving force transmission member is biased by a spring to engage with the driving gear, then engagement is reliable, but the abutting member must overcome spring force to disengage, complicating the disengagement process
Solution Approach 1:
The biasing member acts as a counterforce mechanism that balances the spring force during disengagement. By applying a separating force in opposition to the spring's engaging force, the abutting member can disengage the transmission member without needing to overcome the full spring force alone, simplifying the disengagement process while maintaining engagement reliability
Solution Approach 2:
The system transitions from a static spring-biasing arrangement to a dynamic balance where the biasing member's separating force interacts with the spring force. This dynamic interaction allows the abutting member to control engagement and disengagement more effectively, reducing the complexity of the disengagement mechanism
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 stops driving force transmission without fail, preventing mechanical defects like collision noise and ensuring smooth operation by ensuring the driving force transmission member is fully disengaged from the driving gear, even when the apparatus experiences backlash or reverse rotation.
Implementation Method 1
a biasing member configured to bias the driving force transmission member in a direction where the driving force transmission member is disengaged from the driving member
Data Source
AI summary
When an abutting member is in contact with a driving force transmission member that engages with a driving member, a biasing member biases the driving force transmission member in a direction where the driving force transmission member is disengaged from the driving member.