Pressure Switching Mechanism With Parallel Biasing for Compact Imaging
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Solution Overview
Problem
Existing pressure switching mechanisms in image forming apparatuses face challenges in efficiently switching between pressing and releasing contact members while maintaining compact size and reducing operational force requirements.
Innovation Solution
A pressure switching mechanism utilizing a rotatable support, biasing member, and switching rotation member, where the biasing member applies force in a direction parallel to the pressing direction, and the switching rotation member rotates between pressing and releasing positions, with the rotation operating end positioned opposite the virtual line of contact, allowing for increased lever length without increasing the mechanism's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the biasing member applies force in a direction parallel to the pressing direction, then the operational force requirements are reduced, but the mechanism size may increase
Solution Approach 1:
The biasing member applies force in a direction parallel to the pressing direction rather than perpendicular to it, changing the dimensional orientation of the force application. This allows the lever to be longer in the pressing direction while maintaining compact dimensions in other directions, effectively reducing operational force requirements without proportionally increasing overall mechanism size.
2Length of moving object
If the rotation operating end is positioned on the opposite side of the virtual line, then the lever length can be increased without increasing mechanism size, but the structural complexity increases
Solution Approach 1:
The rotation operating end is positioned asymmetrically on the opposite side of the virtual line from the contact portion, creating an asymmetric lever arrangement. This asymmetric configuration allows the lever to achieve greater effective length in the pressing direction while the overall mechanism footprint remains compact, as the asymmetric layout optimizes space utilization.
3Reliability
If the contact member is pressed with higher force, then the pressing reliability is improved, but the heat exposure and material durability are reduced
Solution Approach 1:
The biasing member is pre-configured to apply force in a direction parallel to the pressing direction, which preliminarily reduces the operational force requirements needed during the pressing action. This preliminary force configuration allows the contact member to be pressed with lower forces while maintaining pressing reliability, thereby reducing heat generation and improving material durability.
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 mechanism effectively presses and releases contact members with reduced operational force requirements while maintaining a compact design, enhancing durability and flexibility in material selection due to reduced heat exposure.
Implementation Method 1
The biasing member has one end connected to a biased portion of the rotatable support. The biasing member applies a biasing force to the rotatable support to rotate the rotatable support in a direction such that the contact member presses the contacted member.
Implementation Method 2
The switching rotation member is connected to another end of the biasing member opposite the one end of the biasing member and rotates around a second rotation shaft between a pressing rotation position to increase the biasing force of the biasing member and a releasing rotation position to decrease the biasing force of the biasing member.
Data Source
AI summary
A pressure switching mechanism includes a rotatable support, a biasing member, and a switching rotation member. The rotatable support rotates around a first rotation shaft to support a contact member such that the contact member is movable in a direction toward or away from a contacted member. The biasing member has one end connected to a biased portion of the rotatable support, which is located on a side opposite the first rotation shaft with respect to a virtual line passing through a contact portion between the contact member and the contacted member, and applies a biasing force to the rotatable support. The switching rotation member is connected to another end of the biasing member opposite the one end of the biasing member, rotates around a second rotation shaft, and has a rotation operating end which is on a side opposite the second rotation shaft with respect to the virtual line.