Printer Cartridge Contact Layout for Easy Replacement
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Solution Overview
Problem
Existing image forming apparatuses face challenges in efficiently and space-efficiently integrating contact mechanisms between the apparatus body and detachable cartridges, particularly during maintenance and replacement operations.
Innovation Solution
The apparatus incorporates a movable contact mechanism where a first contact in the casing and a second contact in the cartridge engage and disengage, with protruding portions aligning to facilitate electrical connection while allowing for the cartridge to be easily attached and detached, and the fixing unit is retractable to create space for cartridge access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the contact mechanism is designed with fixed contacts in the casing and cartridge, then the electrical connection is reliable, but the cartridge cannot be easily attached and detached
Solution Approach 1:
The contact mechanism transitions from a fixed static design to a dynamic system where the first contact can move between a contact position (when cartridge is attached) and a separated position (when cartridge is detached). This dynamic capability allows the contact to adapt to the cartridge's presence or absence, enabling easy attachment and detachment while maintaining reliable electrical connection when engaged.
2Reliability
If the first contact protrudes from the first surface at the contact position, then electrical connection is established, but the contact mechanism becomes complex
Solution Approach 1:
The contact mechanism is designed to automatically establish electrical connection through the relative movement of the first and second contacts when the cartridge is attached. The spring member automatically pushes the first contact to the contact position where it engages with the second contact, eliminating the need for complex control systems or additional actuation mechanisms. The system serves itself by using the mechanical action of cartridge insertion to trigger the electrical connection.
3Device complexity
If the first contact is retracted relative to the first surface at the separated position, then the contact mechanism is simplified, but the electrical connection may be lost
Solution Approach 1:
The first contact is designed to dynamically change its position relative to the first surface based on the cartridge's presence. When the cartridge is detached, the spring member allows the first contact to retract to a separated position, simplifying the mechanism and preventing unwanted electrical connection. When the cartridge is attached, the mechanical interaction automatically moves the first contact to the contact position, reliably establishing electrical connection. This dynamic behavior is achieved through the spring member's elastic deformation.
Data Source
AI summary
An image forming apparatus includes a casing, a cartridge detachably attached to the casing, a first contact disposed in the casing, and a second contact disposed in the cartridge. The casing includes a first side plate and a second side plate. The first side plate includes a first surface and a first protruding portion. The cartridge includes a second surface and a second protruding portion. The first contact is movable between a contact position and a separated position. At the separated position, the first contact protrudes in the first direction relative to the first surface, and is retracted in the opposite direction relative to a maximum protruding position of the first protruding portion with respect to the first surface.