Lock Lever Hook Rotation for Stable Image Forming Unit Mounting
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Solution Overview
Problem
Existing image forming apparatuses face challenges in stably mounting and removing the image forming unit, particularly due to issues with the engagement of the lock lever and guide surface, leading to instability and potential damage during the mounting process.
Innovation Solution
The image forming apparatus incorporates a lock lever with a rotatable hook portion and an interlocking mechanism, allowing the hook to temporarily rotate away from the engaged portion during mounting, ensuring stable engagement and preventing inadvertent disengagement, while also facilitating easy removal by adjusting the lever's posture and contact points to reduce operator error.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lock lever is engaged with the guide surface during mounting, then the image forming unit is positioned, but the engagement may be unstable and prone to damage
Solution Approach 1:
The hook portion is designed to be rotatable relative to the lock lever body, allowing it to dynamically adjust its engagement state. During mounting, the hook can temporarily rotate away from the engaged portion to avoid collision damage, then rotate back to achieve stable engagement, transforming a static rigid connection into a dynamic adaptive one.
Solution Approach 2:
The rotatable hook portion acts as a cushioning mechanism that prevents direct impact damage during mounting. By allowing the hook to temporarily disengage or rotate away before final engagement, the system absorbs potential shock and prevents damage to both the lock lever and guide surface.
2Reliability
If the hook portion is fixed during mounting, then the structure is simple, but the engagement may be unstable and prone to inadvertent disengagement
Solution Approach 1:
The hook portion is designed to be rotatable relative to the lock lever body, allowing it to dynamically adjust its engagement state. During mounting, the hook can temporarily rotate away from the engaged portion to avoid collision damage, then rotate back to achieve stable engagement, transforming a static rigid connection into a dynamic adaptive one.
3Manufacturing precision
If the lock lever requires precise positioning during mounting, then the positioning accuracy is improved, but the ease of operation decreases due to operator error risk
Solution Approach 1:
The lock lever mechanism is designed to be self-aligning and self-positioning. The rotatable hook automatically finds its engagement position with the guide surface through rotation, eliminating the need for precise manual positioning by the operator. The spring member also provides automatic biasing to ensure proper engagement without requiring operator skill.
Solution Approach 2:
The rotatable hook portion acts as a cushioning mechanism that prevents direct impact damage during mounting. By allowing the hook to temporarily disengage or rotate away before final engagement, the system absorbs potential shock and prevents damage to both the lock lever and guide surface.
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
This configuration enables smooth and reliable mounting and removal of the image forming unit, reducing the risk of damage and operator error, and ensures stable positioning by maintaining engagement through the biasing force of the lever spring.
Implementation Method 1
maintaining engagement through the biasing force of the lever spring
Data Source
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AI summary
A printer includes a housing, an image forming unit (120H), a body unit (150), positioning mechanisms and a lock lever (50). The positioning mechanism includes a unit biasing spring (52) and a biasing projection (51), and positions the image forming unit (120H) by biasing the image forming unit (120H) mounted at a first position in the housing. The lock lever (50) is pivotally provided on the image forming unit (120H). The lock lever (50) is turnable between a first posture for locking the image forming unit (120H) at the first position and a second posture for unlocking the image forming unit (120H) and allowing the image forming unit (120H) to be removed from the housing.