Printer Carriage Guide Mechanism for Column Alignment
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Solution Overview
Problem
Printers of the dot impact type face issues with unexpected carriage movement in the column direction, leading to overlaps or misalignment of printed information between forward and backward paths, affecting marketability and printing quality.
Innovation Solution
A printing unit with a carriage supported by a shaft that reciprocates in the row direction, a unit frame allowing movement in the column direction, and interlocking and guide members that regulate carriage movement, ensuring alignment and preventing unexpected shifts, thereby maintaining marketability and printing quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the carriage is allowed to move freely in the column direction to enable printing in multiple columns, then the volume of information that can be printed at a time is increased, but the carriage may move unexpectedly due to external forces, causing overlap or misalignment of printed information
Solution Approach 1:
The guide member changes the parameter of carriage movement by converting purely row-direction movement into coupled row-column diagonal movement. This allows the carriage to access multiple columns while the regulating section maintains precise control over column position, preventing unexpected deviations caused by external forces.
Solution Approach 2:
The guide member acts as an intermediary between the carriage and the column direction movement. It mediates the relationship between row-direction actuation and column-direction positioning, ensuring that the carriage reaches the desired column position without direct column-direction actuation that would be susceptible to external forces.
2Manufacturing precision
If a guide member with regulating section is added to control carriage movement in the column direction, then unexpected carriage movement is prevented and alignment precision is improved, but the device complexity increases
Solution Approach 1:
The guide member performs multiple functions: it guides the carriage in the row direction, controls column-direction positioning through its inclined geometry, and regulates unexpected column movements via the regulating section. This multi-functionality reduces the need for separate mechanisms for each function, thereby limiting the increase in overall device complexity.
Solution Approach 2:
The guide member utilizes the dynamic movement of the carriage in the row direction to automatically achieve column-direction positioning. As the carriage moves along the inclined guide member, the column position changes dynamically without requiring separate actuation, converting a potential complexity into a dynamic solution.
Data Source
AI summary
A printing unit includes: a line feed plate moving with a carriage in a line feed operation area; and guide members provided on a unit frame, engaging with the line feed plate, and guiding the carriage and the line feed plate toward one side in a left-right direction as the carriage and the line feed plate move toward one side in a front-back direction in the line feed operation area. Each guide member includes: a line feed guide extending toward one side in the left-right direction as it goes toward one side in the front-back direction and guiding the carriage toward one side in the left-right direction as the carriage moves toward one side in the front-back direction in the line feed operation area; and regulating sections continuing at least to one end in the front-back direction of the line feed guide and regulating the movement of the carriage in the left-right direction.