Printing Apparatus Carriage Position Selecting Member
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Solution Overview
Problem
In serial printing apparatuses, it is challenging to exclusively drive multiple mechanisms, such as feeding devices and recovery units, using a single driving source, especially when the carriage is at a specific position, as the driving force transmission is restricted, making it difficult to operate these mechanisms simultaneously.
Innovation Solution
A printing apparatus with a carriage, printhead, and a driving source, featuring a movable member and a restricting member that coordinate through a selecting member to switch and select operations, allowing the transmission of driving force to either the feeding units or the recovery unit independently by displacing the transmitting unit and restricting member based on the carriage's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single driving source is commonly used to drive multiple mechanisms, then the device complexity is reduced, but the mechanisms cannot be exclusively driven when the carriage is at a specific position
Solution Approach 1:
The transmitting unit is designed to be displaceable between a transmitting position and a non-transmitting position, allowing the driving force transmission state to be dynamically changed based on operational requirements. This enables the system to switch between transmitting and blocking driving force to the operating unit, resolving the contradiction by making the transmission path dynamic rather than fixed
Solution Approach 2:
The transmitting unit acts as an intermediary between the driving source and the operating unit, controlling whether driving force is transmitted. By positioning this intermediary at specific locations and making it displaceable, the system can selectively transmit or block driving force to different mechanisms, enabling exclusive driving while maintaining a single driving source
2Ease of operation
If the transmitting unit is restricted from displacement to enable exclusive driving, then one mechanism can be exclusively driven, but the operation switching capability is reduced
Solution Approach 1:
The restricting member is designed to be displaceable between a restricting position and a non-restricting position, allowing dynamic control of the transmitting unit's displacement. This enables the system to switch between restricting and allowing the transmitting unit to move, thereby providing both exclusive driving capability and operation switching capability through a single dynamic control mechanism
Solution Approach 2:
The control mechanism is segmented into multiple controllable components (selecting member, restricting member, transmitting unit) that can be independently positioned. This segmentation allows different portions of the mechanism to be controlled independently, enabling both exclusive driving of specific mechanisms and switching between different operational modes
3Ease of operation
If the movable member and restricting member are always coordinated, then the carriage movement can always control the transmitting unit, but independent control of the transmitting unit is lost
Solution Approach 1:
The selecting member is designed to be displaceable between a coordinating position and a non-coordinating position, allowing the coordination state between the movable member and restricting member to be dynamically changed. This enables the system to switch between carriage-based control and independent control of the transmitting unit, providing both control modes as needed
Data Source
AI summary
A printing apparatus includes a printhead on a movable carriage; an operating unit operating by a driving force of a driving source; a transmitting unit being displaced by the driving force between a position where the transmitting unit transmits the driving force to the operating unit and a non-transmitting position; a movable member arranged on a moving path of the carriage; a restricting member being displaced, in coordination with a displacement of the movable member, between a position where the displacement of the transmitting unit is restricted and a non-restricting position; and a selecting member provided between the movable member and the restricting member. The selecting member is displaced between a position where the movable member and the restricting member are coordinated with each other by the selecting member and a non-coordinating position.