Cover Attachment Mechanism for Image Forming Apparatus
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Solution Overview
Problem
In image forming apparatuses, the existing lock mechanisms for covers can easily release during frequent opening and closing, leading to damage when a large force is applied during maintenance, as the engaging strength is increased to firmly fix the cover during usual use.
Innovation Solution
The design incorporates a cover with a first protrusion extending towards the front surface and a second protrusion extending towards the side surface, with a main body featuring an engaging portion and an inclined groove portion that allows the second protrusion to be inserted and extracted, preventing excessive force application during detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the engaging strength between the claw portion and engaged portion is increased to firmly fix the cover during usual use, then the cover can be securely attached, but a large force is applied to the claw portion and engaged portion during maintenance detachment, causing member damage
Solution Approach 1:
The engagement mechanism is divided into two independent systems: a first engagement mechanism (claw portion and engaged portion) for securing the cover during usual use, and a second engagement mechanism (first protrusion with first engaging portion, second protrusion with second engaging portion) for maintenance detachment. This segmentation allows each mechanism to be optimized for its specific function without compromising the other.
Solution Approach 2:
The cover is designed with predetermined breakable portions that can be easily broken or deformed to release the second engagement mechanism during maintenance. This preliminary design of a weak link allows for easy cover removal without applying large forces to the main engagement components, preventing member damage while maintaining secure attachment during normal use.
2Ease of operation
If the cover is frequently opened and closed during usual use, then accessibility and operation are improved, but the engaged state between the claw portion and engaged portion can be easily released, compromising attachment stability
Solution Approach 1:
The engagement mechanism is divided into two independent systems: a first engagement mechanism (claw portion and engaged portion) for securing the cover during usual use, and a second engagement mechanism (first protrusion with first engaging portion, second protrusion with second engaging portion) for maintenance detachment. This segmentation allows each mechanism to be optimized for its specific function without compromising the other.
Solution Approach 2:
Different regions of the cover have different engagement characteristics: the first engagement mechanism provides strong, stable attachment for frequent operation, while the second engagement mechanism with breakable portions provides easy release for maintenance. This local differentiation of engagement properties allows the cover to satisfy both frequent operation needs and maintenance needs.
Data Source
AI summary
An image forming apparatus includes a main body and a cover including a first surface part and a second surface part. The cover includes a first protrusion formed on the first surface part and extending in a first direction and a second protrusion formed on the second surface part and extending in a second direction perpendicular to the first direction. The main body includes an engaging portion engaged with the first protrusion and a groove portion formed along the side surface part and having an opening that opens the front surface part so that the second protrusion is capable of being inserted into and extracted from the main body in the first direction. The groove portion has a portion inclined in a manner that the groove portion is located at a further upper side in a vertical direction as the groove portion becomes closer to the front surface part.