Print Head Holder Position Detection for Misalignment Prevention
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Solution Overview
Problem
Inkjet printing apparatuses face the risk of print head misalignment and damage due to the user inadvertently leaving the holder member fixed during operation, which can lead to mechanical stress and operational issues during transport or relocation.
Innovation Solution
A printing apparatus with a holder member, a moving unit, a fixing member, and a detecting unit that determines if the holder member is properly fixed by measuring its moving distance, ensuring it is not fixed during operation to prevent misalignment and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the holder member is fixed by the fixing member during transport, then the print head position stability is improved, but the device cannot operate normally when the fixing member is not removed
Solution Approach 1:
The detecting unit continuously monitors the position of the holder member and provides feedback to the control unit. When the holder member is detected to be in the fixed position (within the predetermined distance threshold), the control unit automatically issues a warning to the user, creating a feedback loop that prevents operational errors without requiring manual checking.
Solution Approach 2:
The system performs self-checking by automatically detecting whether the fixing member is in place and issuing appropriate warnings or preventing operation. This eliminates the need for manual verification by the user, making the system self-protecting against the common error of operating with the fixing member engaged.
2Ease of operation
If the holder member is moved freely during operation, then the printing functionality is maintained, but the print head may misalign due to transport impacts
Solution Approach 1:
The system dynamically adjusts its behavior based on the detected state of the holder member. When the holder member is in the operational position (not fixed), the system allows normal printing operations. When transported and the holder member is in the fixed position, the system switches to a protected state, preventing operations that could cause misalignment or damage.
3Stability of the object's composition
If a physical fixing mechanism is added to prevent misalignment, then the transport stability is improved, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical interlocking mechanisms with a simpler magnetic fixing mechanism combined with electronic detection and control. The fixing member uses magnetic attraction to hold the holder member in place during transport, while sensors and control units provide the intelligence to detect the fixed state and prevent inappropriate operations, reducing mechanical complexity while maintaining effectiveness.
Data Source
AI summary
The printing apparatus comprises: a print head having an ejection opening surface on which an ejection opening configured to eject ink is formed; a holder member that holds the print head; a moving unit configured to move the holder member; a fixing member that fixes the holder member; a detecting unit configured to detect a moving distance of the holder member; and a first determining part configured to determine that the holder member is fixed by the fixing member in a case where the moving distance detected by the detecting unit is less than a predetermined value.