Toner Case Locking Mechanism for Leakage Prevention
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Solution Overview
Problem
Conventional toner cases for image forming apparatuses lack a reliable mechanism to prevent accidental opening of the toner discharge outlet, leading to potential toner leakage and operational inefficiencies, especially when there is no direct power transmission mechanism for the lever to the opening/closing member.
Innovation Solution
A toner case design featuring a lock member that abuts both the opening/closing member and the lever member to lock them in place, with a drive transmission mechanism that transmits the operation force from the lever to the opening/closing member when attached to the apparatus main body, ensuring secure closure and controlled opening of the toner discharge outlet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lock mechanism is provided to prevent accidental opening of the toner discharge outlet, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines the lock member functionality with the existing lever member and opening/closing member structure. The lock member integrates multiple locking actions (locking the lever and opening/closing member simultaneously) into a single component, reducing overall mechanism complexity while maintaining reliability.
Solution Approach 2:
The lock mechanism is designed to be automatically engaged when the case main body is attached to the apparatus main body. The attachment action itself triggers the locking state, eliminating the need for separate manual locking operations and simplifying the user interface.
2Ease of operation
If a drive transmission mechanism is added to transmit lever operation force to the opening/closing member, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The patent introduces a drive transmission mechanism that acts as an intermediary between the lever member and the opening/closing member. This transmission mechanism (comprising gears or cam structures) converts the lever's rotational motion into linear motion of the opening/closing member, providing mechanical advantage and improved operational control.
Data Source
AI summary
A toner case includes a case main body, a toner discharge outlet, an opening/closing member, a lever member, and a lock member. The case main body can be attached to and detached from an apparatus main body of an image forming apparatus and store toner. The toner discharge outlet is formed on the case main body. The opening/closing member can be moved between an opening position and a closing position. The lever member can be operated between first and second operation positions. The lock member can be moved between: a lock position to abut on the opening/closing member and the lever member, lock the opening/closing member to the closing position and lock the lever member to the first operation position; and an unlock position to be separated from the opening/closing member and the lever member and allow the opening/closing member and the lever member to be released from locks.