Toner Container Contact-Spring Detection for Mounting Compatibility
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Solution Overview
Problem
Existing image forming apparatuses suffer from detection failures due to incompatibility-sensitive structures that prevent the mounting of non-compatible toner containers, leading to potential operational issues.
Innovation Solution
An image forming apparatus with a detection mechanism using annular and plate springs, along with key members, to determine the mounting state and compatibility of toner storage containers, ensuring proper insertion and preventing incorrect mounting through a simple and cost-effective configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an incompatibility-sensitive structure is used to prevent non-compatible toner mounting, then compatibility control is improved, but detection reliability deteriorates due to detection failures from damaged compatibility detection shapes
Solution Approach 1:
The patent replaces the mechanical compatibility detection shape with an electrical detection system using contact springs and conductive/insulating materials. The key member's electrical conductivity properties are detected through contact springs that establish electrical connections, substituting the mechanical shape-based detection with an electrical field-based detection method that is more reliable and less prone to damage-related failures
Solution Approach 2:
The patent introduces contact springs as intermediary elements between the key member and the detection circuit. These contact springs serve as mediators that transmit electrical signals to determine compatibility, providing a more robust detection mechanism that is less susceptible to damage compared to direct mechanical shape detection
2Adaptability or versatility
If a complex incompatibility-sensitive structure is used to ensure compatibility, then compatibility control is improved, but device complexity increases
Solution Approach 1:
The patent extracts the compatibility detection function from the mechanical coupling structure itself and separates it into distinct electrical detection components (contact springs, conductive key member, insulating portions). This separation simplifies the overall structure by removing the need for complex mechanical compatibility detection shapes while maintaining compatibility control through electrical detection
Solution Approach 2:
The key member serves multiple functions: it provides mechanical coupling between the toner container and cartridge, and simultaneously serves as an electrical conductor for compatibility detection. The insulating portions on the key member provide both mechanical positioning and electrical insulation functions, reducing the need for separate components and simplifying the overall structure
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents detection failures and ensures correct toner container mounting, enhancing operational reliability and reducing production costs by simplifying the assembly process.
Implementation Method 1
a first contact spring that is an annular wire spring provided in the coupled portion, a second contact spring that is a plate spring disposed radially inward of the first contact spring
Implementation Method 2
a first contact spring that is an annular wire spring provided in the coupled portion, a second contact spring that is a plate spring disposed radially inward of the first contact spring
Data Source
Figure 1~2
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AI summary
An image forming apparatus (100) includes an image forming portion (Pa to Pd), a toner storage container (4a to 4d), a mounting portion (30a to 30d), a detection mechanism detecting the toner storage container (4a to 4d) mounted in the mounting portion (30a to 30d), and a control portion (190). The detection mechanism includes a detection circuit (140) having, as a first contact spring (92), an annular wire spring provided in the coupled portion (90) and a second contact spring, a plate spring disposed radially inward of the first contact spring (92) to contact the first contact spring (92), and an insulating key member (83) protruding from a coupling portion (80) of the toner storage container (4a to 4d) toward the coupled portion (90). The second contact spring (93) has a plurality of contact terminals (93b) disposed in an arc shape along the first contact spring (92) and contacting the first contact spring (92) at a position corresponding to the key member (83) in the coupled portion (90).