Image Forming Apparatus Vertical Horizontal Unit Connection
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Solution Overview
Problem
Conventional image forming apparatuses face challenges in securely connecting units in a vertical direction due to horizontal displacement risks, especially during impacts, and require additional components and mechanisms that increase complexity and cost, particularly in small devices.
Innovation Solution
The apparatus employs a first and second fitting/fitting portion configuration at the lower and upper units, respectively, allowing vertical and horizontal stabilization through engagement of these portions, eliminating the need for a movable hook and reducing component count and spatial requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single locating portion is used to connect units, then the structure is simple, but horizontal displacement cannot be restricted
Solution Approach 1:
The connection structure is segmented into two distinct locating portions: a first locating portion for vertical direction restriction and a second locating portion for horizontal direction restriction. This segmentation allows each portion to specialize in restricting displacement in its respective direction, achieving comprehensive stability without requiring complex additional mechanisms.
2Stability of the object's composition
If a connection mechanism operated by user is provided, then horizontal displacement can be restricted, but user may forget to operate it
Solution Approach 1:
The connection mechanism operates automatically without requiring user intervention. When units are connected, the first and second locating portions automatically engage with their corresponding fitted portions, self-restricting both vertical and horizontal displacements. This eliminates the risk of user forgetfulness while maintaining connection reliability.
3Stability of the object's composition
If a moveable hook is used to connect units, then horizontal displacement can be restricted, but additional mechanism and components are required
Solution Approach 1:
The functions of vertical restriction and horizontal restriction are merged into a single integrated connection interface. The first and second locating portions work together as one unified structure, eliminating the need for separate moveable hook mechanisms and reducing overall device complexity.
Solution Approach 2:
The complex moveable hook mechanism is extracted and replaced with simple locating portions that achieve the same horizontal restriction function through geometric engagement rather than mechanical actuation, significantly reducing component count.
4Stability of the object's composition
If a mechanism for sliding the unit is required in addition to the moveable hook, then horizontal displacement can be restricted, but space and cost increase seriously
Solution Approach 1:
The patent uses simple, inexpensive locating portions made from basic structural elements rather than complex mechanical systems. These locating portions achieve horizontal restriction through geometric constraints rather than requiring additional sliding mechanisms, dramatically reducing both space requirements and manufacturing costs.
Data Source
AI summary
An image forming apparatus includes vertically connected units, first and second fitting portions, and first and second fitted portions. These fitting portions are provided at a lower portion of an upper unit. These fitted portions are provided at an upper portion of a lower unit downwardly adjacent to the upper unit. The first fitted portion corresponds to the first fitting portion and the second fitted portion corresponds to the second fitting portion. The upper unit is restricted from displacing vertically relative to the lower unit when the first fitting portion engages with the first fitted portion. The second fitting portion engages with the second fitted portion such that the upper unit is restricted from moving horizontally relative to the lower unit, when a user pivots the upper unit downwardly about the first fitting portion while the first fitting portion is engaged with the first fitted portion.