Printer Blade Assembly Separation for Jammed Sheet Removal
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Solution Overview
Problem
Existing printers face issues with jammed recording sheets between the fixed and movable blades, where the open/close window may not open even when the lock mechanism is unlocked, and the conjunctional mechanism is complex and difficult to operate.
Innovation Solution
A printer design featuring a simple structure with a separating mechanism that uses an opening and closing lever to separate the fixed blade from the movable blade by rotating from a locking to a free position, combined with an elastic support and swing mechanism to facilitate easy opening and closing of the blade assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conjunctional mechanism is used to separate the fixed blade from the movable blade, then the recording sheet can be cut, but the mechanism becomes complex and difficult to operate
Solution Approach 1:
The opening and closing part is separated into distinct functional segments: the lever part for user operation, the blade support structure, and the conjunctional mechanism. This segmentation allows each component to be optimized independently, simplifying the overall structure while maintaining functionality
Solution Approach 2:
The conjunctional mechanism is extracted as a separate, dedicated component rather than being integrated into the blade structure itself. This extraction simplifies the blade design and makes the conjunctional mechanism more accessible and easier to operate
2Reliability
If the opening and closing part is locked to the body part, then the blades remain in contact for cutting, but the open/close window cannot be opened when jammed
Solution Approach 1:
The locking mechanism transitions from a static locked state during normal operation to a dynamic unlocked state when jamming is detected. The lever part can rotate between a locked position (blades in contact) and an unlocked position (opening and closing part can open), providing adaptive functionality based on operational conditions
Solution Approach 2:
The lever part serves as an intermediary mechanism between the user's manual input and the blade conjunction state. By operating the lever, the user can control whether the blades remain in contact or separate, providing a simple interface for managing the complex blade interaction
3Productivity
If the fixed blade and movable blade remain in contact, then cutting is effective, but recording sheets may get jammed between the blades
Solution Approach 1:
The elastic part is pre-loaded to exert a separating force on the fixed blade, creating a preliminary anti-action that prevents recording sheets from getting jammed between the blades. This elastic force acts continuously to counteract the contact pressure, allowing effective cutting while preventing jamming
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
Ensures reliable and easy operation of the printer even when a recording sheet gets jammed, allowing the fixed blade to be separated from the movable blade efficiently, reducing jamming and ensuring user safety by facilitating easy access and removal of jammed sheets.
Implementation Method 1
an elastic support part that supports the fixed blade at the cutting angle
Data Source
AI summary
A printer includes: a printing part for printing on a recording sheet; a fixed blade and a movable blade for cutting the recording sheet; a body part supporting the movable blade; an opening and closing part supporting the fixed blade and having a first end connected to the body part such that the opening and closing part opens and closes; an opening and closing lever provided at a second end of the opening and closing part opposite the first end and rotating between a free position for allowing the opening and closing part to open and close and a locking position for fixing the opening and closing part to the body part; and a separating mechanism for separating the fixed blade from the movable blade in a separating direction in conjunction with an unlocking operation of the opening and closing lever.