Printing Device Thermal Head Support for Extended Axial Movement
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Solution Overview
Problem
The movable range of the thermal head in existing printing devices is limited by the rotation shaft, restricting its movement in the left-right direction.
Innovation Solution
The printing device incorporates a separate rotation shaft and pivot member, allowing the thermal head to move without being constrained by the rotation shaft, with a support mechanism that includes a pivot shaft and biasing means to enhance movement range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the thermal head is provided on the rotation shaft and moves in the axial direction on the rotation shaft, then the structure is simplified, but the movable range of the thermal head is limited
Solution Approach 1:
The invention divides the support function into two separate components: the rotation shaft provides rotational support, while the linear bush provides axial movement support. This segmentation allows the thermal head to move independently in both rotational and axial directions without being constrained by the rotation shaft's axial length, thereby increasing the movable range while maintaining structural simplicity.
Solution Approach 2:
The linear bush acts as an intermediary component between the thermal head and the rotation shaft. It enables the thermal head to move in the axial direction independently of the rotation shaft, serving as a mediator that decouples the rotational function from the axial movement function, thus expanding the movable range without complicating the overall structure.
2Ease of operation
If the linear bush is connected to the thermal head and moves on the rotation shaft, then the thermal head can move in the axial direction, but the movable range is limited to the range between both end portions of the rotation shaft
Solution Approach 1:
The invention segments the support functions by providing a separate linear bush that is not constrained by the rotation shaft's axial length. The linear bush independently supports the thermal head's axial movement, allowing the movable range to extend beyond the rotation shaft's end portions while maintaining ease of axial operation.
3Length of moving object
If the rotation shaft and first rotation shaft are separately provided, then the movable range of the thermal head is increased, but the device complexity increases
Solution Approach 1:
The invention uses segmentation to separate the rotational support function (rotation shaft) from the axial movement support function (linear bush). This functional segmentation enables increased movable range while actually simplifying the overall structure compared to using a single complex rotation shaft that would need to accommodate both functions.
Solution Approach 2:
The linear bush serves as an intermediary component that enables axial movement without being part of the rotation shaft structure. This intermediary approach allows the thermal head to achieve extended axial movement capability while keeping the rotation shaft simple and focused on its primary rotational function, thereby increasing movable range without proportionally increasing device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The enhanced support mechanism increases the movable range of the thermal head, enabling wider movement and accurate positioning, while allowing for easy replacement and cost-effective implementation.
Implementation Method 1
a biasing means configured to bias the thermal head upward
Implementation Method 2
a pressing portion provided on the lower end portion of the support member and configured to press the thermal head downward
Data Source
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AI summary
Provided is a printing device that can increase a movable range of a thermal head. A rotating shaft 11 of the printing device extends in a right-left direction and is rotatably supported about an axis. A rotating member 21 is connected to the rotating shaft 11 and rotates integrally with the rotating shaft 11 about the rotating shaft 11. A pressing shaft 15 extends parallel to the right-left direction, is supported by the rotating member 21 below the rotating shaft, and rotates about the rotating shaft 11. An L-shaped member 18 has a central part 18C movable along the pressing shaft 15 and is rotatably journaled about the pressing shaft 15. A front end 18F is provided with a pressing roller 23 that presses a thermal head 39 downward.