Winding Core Lock Mechanism for Printer Cassette Attachment
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Solution Overview
Problem
The existing lengthy article take-up apparatuses for printers have low operability and complex structures due to the need to slide a slide button against a spring reaction force for cassette attachment and detachment, which complicates the mechanism and reduces ease of use.
Innovation Solution
A take-up apparatus with a winding core member that includes a shaft member, a driven gear, and a lock member, where the lock member is integrated into the winding core member rather than the housing, allowing for easy attachment and detachment by swinging the shaft member to engage with the bearing portion, simplifying the structure and improving operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring-activated slide button mechanism is used for cassette attachment, then the clutch engaging piece can be automatically engaged with the driven-side engaging piece, but the structure becomes complicated and operability is reduced
Solution Approach 1:
The patent removes the spring and slide button components from the attachment mechanism. Instead of using a complex spring-activated mechanism, the driving-side engaging piece is directly exposed on the driving shaft, allowing for simple manual engagement with the driven-side engaging piece without any additional components.
Solution Approach 2:
The patent separates the attachment mechanism into independent components: the driving shaft with the driving-side engaging piece, the cassette with the driven-side engaging piece, and the flange for positioning. This segmentation allows each component to function independently and simplifies the overall attachment process.
2Reliability
If a spring-activated slide button mechanism is used for cassette attachment, then the clutch engaging piece can be automatically engaged, but the operability is low due to the need to slide against spring reaction force
Solution Approach 1:
The patent removes the spring and slide button components from the attachment mechanism. Instead of using a complex spring-activated mechanism, the driving-side engaging piece is directly exposed on the driving shaft, allowing for simple manual engagement with the driven-side engaging piece without any additional components.
Solution Approach 2:
Instead of requiring the user to press a slide button against spring reaction force to engage the clutch, the design allows the clutch engaging pieces to be directly engaged by simply attaching the cassette to the driving shaft. The engagement occurs automatically when the cassette is placed on the driving shaft, eliminating the need for manual sliding operations.
3Reliability
If the driving-side engaging piece is pulled into the recess portion for attachment, then the cassette can be securely attached, but the structure becomes complicated due to the need for advancing/retracting mechanism
Solution Approach 1:
The patent removes the spring and slide button components from the attachment mechanism. Instead of using a complex spring-activated mechanism, the driving-side engaging piece is directly exposed on the driving shaft, allowing for simple manual engagement with the driven-side engaging piece without any additional components.
Solution Approach 2:
The driving-side engaging piece is pre-positioned on the driving shaft in an exposed state, ready for immediate engagement. The flange is pre-configured to guide the cassette into the correct position. When the cassette is attached, the engaging pieces automatically engage without requiring any advancing or retracting actions.
4Reliability
If the lock member is disposed on the housing, then the shaft member can be fixed to the bearing portion, but the structure becomes complicated due to the need for spring and slide button mechanism
Solution Approach 1:
The patent removes the spring and slide button components from the attachment mechanism. Instead of using a complex spring-activated mechanism, the driving-side engaging piece is directly exposed on the driving shaft, allowing for simple manual engagement with the driven-side engaging piece without any additional components.
Solution Approach 2:
The lock member is integrated into the winding core member itself, allowing it to automatically engage with the bearing portion when the winding core member is attached to the housing. The shaft member is self-positioning and self-locking, eliminating the need for external spring-activated locking mechanisms.
Data Source
AI summary
A lengthy article take-up apparatus includes a housing, a winding core member, a bearing portion and a driving gear is provided. The winding core member is configured to take up the lengthy article. The winding core member includes a shaft member, a cylindrical winding body, a driven gear, and a lock member. The shaft member is configured to be detachably fitted to the bearing portion. The cylindrical winding body is disposed rotatably on an outer periphery of the shaft member and configured to wind the lengthy article on an outer peripheral side. The driven gear is fixed to the winding body and configured to be meshed with the driving gear when the winding core member is attached to the housing. The lock member is configured to fix the shaft member to the bearing portion when the winding core member is attached to the housing.