Developing Device Sealing Unit Guide Groove Mechanism
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Solution Overview
Problem
Existing developing devices face issues with the handleability of extended toner seals, which can lead to tearing, wrinkling, and leakage during operation, and require unnecessary labor for operators to manage the free-projecting seal portions.
Innovation Solution
A developing device with a sealing unit that includes a sealing tape portion and an extended tape portion, a scraping unit to remove deposited developer powder, and a holding unit that securely manages the extended tape portion to prevent leakage and simplify handling, allowing the seal to be pulled out without additional adhesives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the toner seal projects from the side surface of the toner containing unit, then the seal can be pulled out to supply toner, but the projecting portion is in a free state requiring operator handling and may be torn or wrinkled
Solution Approach 1:
A guide groove is introduced as an intermediary structure between the toner seal and the operator's hand. The guide groove receives and guides the extending portion of the toner seal, providing a controlled path for pulling the seal without direct manual handling. This mediator prevents the seal from being torn or wrinkled while maintaining ease of operation.
Solution Approach 2:
The guide groove structure enables the toner seal to guide itself during the pulling operation. Instead of requiring operator skill and attention to handle the free-projecting seal, the guide groove automatically directs the seal along the correct path, making the system self-guiding and reducing operational complexity.
2Productivity
If the toner seal is pulled while being inclined, then the seal may be torn or have wrinkles generated causing developer leakage
Solution Approach 1:
The guide groove acts as a mediator that constrains the motion of the toner seal during pulling. By providing a defined groove path, it ensures the seal is pulled linearly without inclination, preventing tearing and wrinkles while maintaining efficient toner supply speed.
Solution Approach 2:
The guide groove changes the motion parameter of the toner seal from arbitrary inclined movement to constrained linear movement. This parameter control ensures the seal is always pulled in the correct direction, preventing deformation while maintaining operational efficiency.
3Device complexity
If the extended portion of the toner seal member is in a free state, then assembly is simple, but operator workload increases and temporary adhesion tape may be required
Solution Approach 1:
The guide groove serves as a built-in intermediary structure that eliminates the need for temporary adhesion tape or other external holding mechanisms. The groove naturally holds and guides the extending portion of the seal during assembly and operation, reducing operator workload without adding complexity to the assembly process.
Solution Approach 2:
The guide groove structure enables the system to self-hold and self-guide the toner seal extending portion. Instead of requiring external tools or operator attention to manage the free-projecting seal, the guide groove automatically performs this function, reducing operational burden while maintaining assembly simplicity.
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 enhances handleability by reducing the risk of tearing and wrinkling, minimizing operator workload, and preventing developer leakage during assembly and use, while allowing for efficient sealing and unsealing of the developer storage unit.
Implementation Method 1
a scraping unit that is disposed at an end portion of the developer storing unit in the longitudinal direction and that causes the extended tape portion of the sealing unit to move while making frictional contact with the scraping unit so as to scrape off developer powder deposited on the extended tape portion and on the sealing tape portion
Data Source
AI summary
A developing device includes a developer storing unit that stores a developer before use of the developing device, a developer containing unit that contains, when the developing device is used, the developer stored in the developer storing unit such that the developer is capable of being stirred by the developer containing unit, a developer holding unit that is provided in a portion of the developer containing unit and that holds the developer contained in the developer containing unit and moves the developer in a rotation direction, a sealing unit including a sealing tape portion that seals a slit-shaped opening formed in the developer storing unit along a longitudinal direction of the developer storing unit while the sealing tape portion is capable of being pulled out and that seals the slit-shaped opening of the developer storing unit by being removably fixed onto an edge of the opening and an extended tape portion that is folded at an end of the sealing tape portion in a longitudinal direction of the sealing tape portion and that extends along the sealing tape portion in such a manner as to project outward beyond the sealing tape portion, a scraping unit that is disposed at an end portion of the developer storing unit in the longitudinal direction and that causes the extended tape portion of the sealing unit to move while making frictional contact with the scraping unit so as to scrape off developer powder deposited on the extended tape portion and on the sealing tape portion, which follows movement of the extended tape portion, and a holding unit that is disposed outside the scraping unit in the longitudinal direction of the developer storing unit with a space formed between the holding unit and the scraping unit and that holds the extended tape portion and the sealing tape portion such that the extended tape portion and the sealing tape portion are capable of moving.