Fuser Driving Device With Axial Arm Retraction for Disassembly
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Solution Overview
Problem
The increased size of the gear and insufficient withdrawing distance in conventional fuser driving devices prevent the driving arm from being completely detached from the fuser, making it impossible to disassemble the fuser.
Innovation Solution
A fuser driving device with a withdrawing device comprising a pulling member and an operating member, allowing the driving arm to be pulled into the gear, and optionally incorporating a spring for automatic retraction, facilitates the detachment of the driving arm from the fuser.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the gear size is increased to provide higher rotating torque for the fuser, then the power and torque capability are improved, but the withdrawing distance of the gear in the limited space becomes smaller, making it insufficient to completely withdraw the driving arm from the fuser joining part
Solution Approach 1:
The patent introduces an additional axial dimension for the driving arm movement. Instead of relying solely on the radial gear withdrawal, the driving arm is designed to move axially along the gear axis direction. This allows the driving arm to be completely withdrawn from the fuser joining part by combining the limited radial gear withdrawal with sufficient axial movement, thereby solving the contradiction between increased gear size and insufficient withdrawing distance.
2Strength
If the gear and driving arm size are increased to handle higher power requirements, then the torque transmission capability is improved, but the withdrawing distance in the limited space becomes insufficient for complete detachment
Solution Approach 1:
The patent adds axial movement capability to the driving arm, enabling it to withdraw along the gear axis direction. This dimensional addition allows the driving arm to be completely detached from the fuser joining part even when the gear and driving arm sizes are increased for higher torque requirements, thus maintaining ease of disassembly while preserving strength.
Solution Approach 2:
The patent separates the withdrawal movement into two independent components: radial withdrawal of the gear and axial withdrawal of the driving arm. This segmentation allows each component to be optimized independently - the gear can be sized for adequate torque while the driving arm utilizes the axial dimension to achieve complete detachment, thereby resolving the contradiction between strength and ease of operation.
3Power
If the gear size is enlarged to provide sufficient rotating torque, then the power transmission is improved, but the limited space causes the withdrawing distance to be insufficient for driving arm separation
Solution Approach 1:
The patent utilizes the axial dimension along the gear axis to provide additional withdrawal space for the driving arm. Instead of requiring all withdrawal distance in the radial direction (which is limited by the enlarged gear size), the driving arm moves axially to achieve complete separation. This effectively increases the available withdrawal space without increasing the overall device volume.
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
Enables complete detachment of the driving arm from the fuser, even with enlarged gear sizes, by utilizing a pulling mechanism and spring-assisted retraction, thus allowing for easy disassembly and preventing damage to the fuser.
Implementation Method 1
a spring arranged between the driving arm and the gear, and the spring is compressed when the pulling member pulls the driving arm to withdraw into the gear
Implementation Method 2
The rotating shaft of the handle is provided with a torsion spring, so that the handle can be kept in a position when it is not applied with a force
Data Source
AI summary
A fuser driving device is provided and includes a front frame and a rear frame. The front frame and the rear frame are fixedly connected to each other. Two ends of a gear are respectively mounted to the front frame and the rear frame. A driving arm is mounted in the gear and is movable axially along the gear to enter into or withdraw from the fuser. When the driving arm enters into the fuser, the driving arm is driven to rotate through the gear, to drive a fusing roller to rotate. A withdrawing device includes a pulling member and an operating member. One end of the pulling member is connected to the driving arm and the other end is connected to the operating member. The pulling member is moved by operating the operating member to pull the driving arm to withdraw from the fuser into the gear.