Printer Cover Lock Lever for Semi-Lock Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Thermal printers lack the ability to detect a semi-locked state where the cover is partially unlocked, and operation in confined spaces can be hindered due to the lock mechanism being difficult to release.
Innovation Solution
A printer design with an opening-closing lever that includes engagement portions and a lock release lever, coupled with an open-close sensor, allows for detection of the locked state and enables release even in limited spaces, using a simple plunger-type sensor to confirm the lock position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional lock mechanism is used without detection capability, then the structure is simple, but the ability to detect locked state is lost
Solution Approach 1:
The patent applies feedback by introducing a sensor that detects the position of the opening-closing lever and provides this information back to the control unit. This allows the system to know the locked state without fundamentally changing the mechanical lock structure. The sensor creates an information feedback loop that enables reliable detection while keeping the mechanical structure relatively simple.
Solution Approach 2:
The patent uses an opening-closing lever as an intermediary mechanical element that translates the locked/unlocked states into detectable positions. The lever acts as a mediator between the lock mechanism and the sensor, allowing the sensor to indirectly detect the lock state through the lever's position rather than directly monitoring the lock itself.
2Ease of operation
If the open-close button is used to release the lock, then the operation is simple, but the button is difficult to press in confined spaces
Solution Approach 1:
The patent segments the lock release function into two separate operations: pressing the open-close button to disengage the lock engagement, and rotating the opening-closing lever to fully release the lock. This segmentation allows the button to remain simple for initial disengagement while the lever provides the mechanical advantage needed for full release in confined spaces.
Solution Approach 2:
The patent introduces dynamic elements by making the opening-closing lever rotatable between different positions (engaged and disengaged). This rotational movement provides mechanical leverage that evolves during the release process, allowing users to apply force more effectively in confined spaces compared to a static button press.
3Reliability
If the opening-closing lever is added with engagement portions, then the locking reliability is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple functions into the opening-closing lever: it serves as both the detection indicator (through its position relative to the sensor) and the locking mechanism (through its engagement portions). This consolidation improves reliability by integrating the locking and detection functions into a single coordinated component rather than separate systems.
Solution Approach 2:
The opening-closing lever is designed as a multi-functional component that performs detection, locking, and release operations. The engagement portions provide mechanical locking while the lever's position provides detection information, and its rotational capability enables release. This universality reduces the need for separate components for each function.
Data Source
AI summary
A printer according to one embodiment of the present disclosure includes: a printer section configured to print on recording paper; a main body configured to support a first portion of the printer section; an openable-closable section rotatably connected to the main body about a rotary shaft orthogonal to a width direction (Y-axis direction) of the recording paper and configured to support a second portion of the printer section. The printer further includes an opening-closing lever provided at a second end portion of the openable-closable section on a side opposite to a first end portion connected to the main body and configured to rotationally move between a release position, in which the openable-closable section can be opened and closed, and a lock position, in which the openable-closable section is closingly fixed to the main body.