Cutting Device Linkage Mechanism for Compact Printing Media
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Solution Overview
Problem
Existing cutting devices for printing media face challenges in applying sufficient load for effective cutting while maintaining a compact size, as the supporting member deformation reduces cutting efficiency and increases device volume due to the need for a substantial vertical length.
Innovation Solution
A cutting device design featuring a rotating body, first and second link members, a placement part, and a movable blade holder, where the rotating body drives the link members to swing, allowing the movable blade holder to move between cutting and retracted positions, applying a substantial load to the printing medium while maintaining a reduced device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cutting blade is fixed to the supporting member at an upper position with respect to the caulking pin, then the cutting function is achieved, but the supporting member requires a substantial length in vertical direction, causing the device volume to increase
Solution Approach 1:
The patent repositions the cutting blade from a vertically upper position to a horizontally adjacent position relative to the placement table. The blade is now located at a position adjacent to the placement table in a direction crossing the front-rear direction, transforming the spatial arrangement from vertical stacking to horizontal positioning. This dimensional change eliminates the need for substantial vertical length while maintaining cutting functionality.
Solution Approach 2:
Instead of positioning the blade above the placement table as in conventional designs, the patent inverts the spatial relationship by placing the blade adjacent to the placement table in the front-rear direction. This inversion of the traditional vertical arrangement to a horizontal arrangement reduces the vertical dimension requirements and overall device volume.
2Force
If the supporting member is made long enough to accommodate the blade at upper position, then the cutting load is sufficient, but the device size increases
Solution Approach 1:
The patent achieves sufficient cutting load without increasing supporting member length by repositioning the blade to an adjacent horizontal position. The supporting member now extends in the front-rear direction to support the blade at an adjacent position rather than vertically upward. This dimensional reconfiguration maintains the necessary support span for adequate cutting force while reducing overall device volume.
3Manufacturing precision
If the supporting member is positioned vertically above the placement table, then the cutting alignment is precise, but the device volume increases due to substantial vertical length requirement
Solution Approach 1:
The patent maintains cutting alignment precision by positioning the blade adjacent to the placement table in the front-rear direction, with the blade's cutting edge aligned to contact the printable tape on the placement table. This horizontal alignment approach achieves the same precision as vertical positioning without requiring substantial vertical space, thereby reducing device volume.
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 design enables effective cutting of printing media with a substantial load application while minimizing the device's size, enhancing cutting efficiency and reducing volume by optimizing the movement and support mechanisms.
Implementation Method 1
The rotating body has a first groove cam. The first link member includes a first-link first end portion and a first-link second end portion. The first-link first end portion has a first pin engaging with the first groove cam. The first link member is configured to swing according to sliding movement of the first groove cam with respect to the first pin caused by the rotation of the rotating body.
Implementation Method 2
The first link member is swingably supported by a frame and is configured to swing according to rotation of the rotating body. The second link member is swingably supported by the frame and is configured to swing according to swing movement of the first link member. The movable blade holder is configured to swing according to swing movement of the second link member.
Data Source
AI summary
A cutting device, including a rotating body, a first link member, a second link member, a placement part, and a movable blade holder, is provided. The first link member is swingable by rotation the rotating body. The second link member is swingable by the movement of the first link member. The movable blade holder is swingable by the movement of the second link member between a cutting position and a retracted position. The rotating body is located sideward from a basal end portion of the movable blade holder, the motor is located sideward from a center of the placement part, a swing axis of the second link member is located sideward from the second end of the placement part, and the first link member is located between the second link member and the rotating body, sideward from the center of the placement part, in a predetermined orientation.