Printer Movable Blade Unit Jam Resolution Mechanism
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Solution Overview
Problem
Conventional printers with cutting mechanisms that cut rolled recording media face issues such as prolonged manual operation to resolve cutter jam, increased complexity leading to larger apparatus size, and risk of operator injury due to protruding blades.
Innovation Solution
A printer design featuring a movable blade unit with a biasing member and locking mechanism, allowing for easy accommodation of the blade within the printer body when jammed, and a cover unit that can be safely opened to prevent operator contact with the blade, along with a detachable and replaceable blade unit for simplified maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the movable blade is manually rotated to resolve cutter jam, then the cutter jam can be released, but the operation time is prolonged and operator safety is compromised
Solution Approach 1:
The movable blade unit is designed to automatically accommodate the protruding movable blade back into the accommodating unit when the cover unit is opened, eliminating the need for manual rotation operations by the operator. The system serves itself by using the cover opening action to trigger the blade retraction mechanism.
Solution Approach 2:
The mechanism performs preliminary action by ensuring the movable blade is accommodated back into the safe position before the cover unit is fully opened. The biasing member and locking mechanism work in advance to secure the blade during the cover opening process.
2Reliability
If the movable blade unit includes complex locking mechanisms, then blade safety is improved, but device complexity increases
Solution Approach 1:
A biasing member (spring) is introduced as an intermediary element to provide the force necessary for accommodating the movable blade back into the accommodating unit. This simple mechanical intermediary replaces complex active control mechanisms while ensuring safe blade retraction.
Solution Approach 2:
The locking mechanism is designed to automatically engage and disengage based on the positional relationship between the movable blade and the accommodating unit, without requiring external control systems. The system uses its own operational movements to trigger the locking and unlocking actions.
3Ease of repair
If the movable blade unit is made detachable for easy maintenance, then ease of repair is improved, but device complexity increases
Solution Approach 1:
The movable blade unit is segmented as a separate, detachable module from the printer main body. This allows the movable blade assembly to be independently removed and replaced without disassembling the entire printer, simplifying maintenance while maintaining a relatively simple 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
Facilitates quick and safe resolution of cutter jam and reduces operator risk while allowing for easy maintenance and replacement of worn parts, enhancing user safety and operational efficiency.
Implementation Method 1
a biasing member that biases the movable blade unit in a downstream direction
Data Source
AI summary
A printer includes a fixed blade attached to a cover unit; a movable blade that faces a fixed blade, freely reciprocates relative to the fixed blade when the cover unit is closed and cuts the recording medium together with the fixed blade by overlapping the fixed blade during reciprocation; a movable blade driving motor that causes the movable blade to reciprocate; and a movable blade unit that includes the movable blade, the movable blade driving motor, and an accommodating unit accommodating the movable blade and provided at a printer main body. The printer further includes a mechanism that, when the movable blade protrudes from the accommodating unit and is stopped, widens a space over which the fixed blade and the protruding movable blade face each other before the movable blade driving motor accommodates the protruding movable blade in the accommodating unit, as initiated by operation of a cover opening lever.