Developing Cartridge Fixed Contact Surface for Stable Chip Connection
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Solution Overview
Problem
The unstable electrical connection between the developing chip and the image forming device in developing cartridges due to the movement of the developing holder relative to the casing, leading to potential disconnection and undesirable situations for both manufacturers and users.
Innovation Solution
A developing cartridge design with a fixed electrical contact surface and a movable protrusion that receives a force to stabilize the connection, ensuring the developing chip maintains contact with the image forming device by using a movable member to abut against the device's rib plate, supported by an elastic member, maintaining a stable electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the developing holder is made movable within a limited range relative to the casing, then the developing cartridge can be detached and replaced easily, but the electrical connection between the developing chip and the image forming device becomes unstable
Solution Approach 1:
The invention divides the developing cartridge into distinct functional components: a movable developing holder for easy replacement and a fixed electrical contact surface for stable connection. The developing holder can be detached and replaced independently, while the electrical contact surface remains stationary to ensure reliable electrical connection between the developing chip and the image forming device.
Solution Approach 2:
The invention introduces an intermediary structure (the fixed electrical contact surface on the casing) that mediates between the movable developing holder and the image forming device. This intermediary ensures that even when the developing holder moves for replacement, the electrical connection pathway remains stable and reliable through the fixed contact surface.
2Adaptability or versatility
If the developing chip is supported on the movable developing holder, then the cartridge can be replaced by users without professional help, but the electrical connection may disconnect due to movement
Solution Approach 1:
The invention segments the developing cartridge system into a user-replaceable developing holder and a fixed electrical contact infrastructure. Users can replace the developing holder without affecting the electrical connection system, which remains stationary and connected to the image forming device, thus maintaining both user replaceability and connection reliability.
Solution Approach 2:
Instead of making the electrical contact surface movable with the developing holder, the invention inverts the approach by fixing the electrical contact surface to the casing and allowing the developing holder to move independently. This inversion ensures that the electrical connection remains stable while the developing holder maintains its replaceability.
Data Source
AI summary
A developing cartridge has a casing for accommodating developer and having a first side and a second side opposite each other in a first direction and a third side and a fourth side opposite each other in a second direction. The developing cartridge also has a rotatable input gear on the first side, for receiving a driving force; a developing roller on the third side; a chip with an electrical contact surface on the first side; and a first protrusion on the first side and having a first force receiving surface. The electrical contact surface is fixed relative to the casing. When the developing cartridge is mounted in an image forming device, the first force receiving surface may receive a force (e.g., by abutting a door cover of the image forming device), thereby moving the developing cartridge against gravity.