Connection Device Sliding Locking Mechanism for Image Formers
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Solution Overview
Problem
Conventional connection devices for image forming apparatuses face difficulties in easily attaching and detaching optional devices due to the force exerted by plate springs, which also complicates electrical conduction and detachment during malfunctions like paper jams.
Innovation Solution
A connection device featuring a conductive fixed locking member and a movable locking member with elliptical holes allows for easy insertion and retention of a conductive pin, facilitating both mechanical and electrical connections while allowing for secure attachment and easy detachment, with the movable locking member sliding to unlock and lock positions to manage the pin's engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional connection device with plate springs is used to secure the connection between the image forming apparatus and optional device, then electrical connection is achieved, but the detachment process becomes difficult and requires significant effort
Solution Approach 1:
The locking member is designed to switch between a locked position (where the locking protrusion engages the locking hole) and an unlocked position (where the spring pushes the locking member away from the engaging portion). This dynamic mechanism allows easy transition between secure connection and easy detachment states.
Solution Approach 2:
The connection device is divided into separate functional components: a locking member with a locking protrusion, a locking hole in the positioning pin, and a spring mechanism. This segmentation allows the locking and releasing functions to be independently controlled, enabling easy detachment while maintaining secure connection during operation.
2Reliability
If conductive members are exposed externally for electrical connection, then electrical conduction is achieved, but user safety risks increase
Solution Approach 1:
The conductive locking member is nested within the housing structure, with the locking protrusion and locking hole positioned such that the conductive parts are not exposed to the external environment. The electrical connection is established through this nested arrangement, maintaining safety while ensuring conductivity.
Solution Approach 2:
The locking member serves as an intermediary component that simultaneously provides mechanical locking and electrical connection functions. By using this intermediate structure, the patent achieves electrical conduction without requiring exposed conductive surfaces that would pose safety risks.
3Ease of operation
If a simple locking mechanism is used for attachment, then ease of operation is improved, but connection reliability during malfunction situations deteriorates
Solution Approach 1:
The spring is pre-loaded to continuously push the locking member toward the locked position, ensuring that the connection is securely maintained before any malfunction occurs. This preliminary action of the spring ensures reliable connection while allowing easy release when needed.
Solution Approach 2:
The locking mechanism utilizes changes in the position parameter of the locking member (between locked and unlocked positions) to achieve different functional states. The spring force parameter ensures reliable locking during normal operation, while the geometric design of the locking protrusion and hole allows easy release during malfunction situations.
Data Source
AI summary
A connection device includes a fixed locking member that is connected electrically to a conductive first frame of a post processor, and a conductive movable locking member that contacts an outer face of the fixed locking member and can slide. A conductive positioning pin that is connected electrically to a conductive second frame of a copying machine is inserted in a pin insertion hole and a large diameter portion in an unlock position of the movable locking member. When the movable locking member is further moved to slide to a lock position, the positioning pin is engaged and fixed to a small diameter portion, so that a conductive plate spring of the movable locking member contacts the positioning pin.