Printing Tape Cassette Recess Layout for Compact Roll Nesting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cassettes for printing devices are not optimized for downsizing in a direction orthogonal to the up-down direction, leading to inefficient use of space and potential bulkiness.
Innovation Solution
The cassette design includes a printing tape roll with a spacer film and an outer peripheral wall comprising sidewalls and a recess wall, allowing for a compact arrangement of components such as the printing tape roll, ink ribbon roll, and laminating tape roll, with the recess extending beyond the sidewall to accommodate these components efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the cassette components are arranged in a conventional layout, then the structure is simple to manufacture, but the size in the direction orthogonal to the up-down direction is large
Solution Approach 1:
The patent applies nesting by placing the ink ribbon roll and laminating tape roll inside the recess of the outer peripheral wall, which is located within the footprint of the printing tape roll. This nested arrangement allows multiple components to occupy overlapping spatial projections, significantly reducing the cassette's overall size in the direction orthogonal to the up-down direction while maintaining a manageable structural complexity through systematic component integration.
Solution Approach 2:
The patent transitions from a conventional two-dimensional lateral arrangement of components to a three-dimensional nested configuration. By utilizing the vertical dimension and creating overlapping projections in the width direction, the design achieves compactness without requiring complex lateral extensions, thus reducing the cassette's width while maintaining structural feasibility.
2Area of stationary object
If the recess extends beyond the sidewall to accommodate components, then space utilization improves, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by providing the spacer film specifically at the recess bottom where high-precision positioning is critical, while other areas of the outer peripheral wall maintain standard manufacturing tolerances. The spacer film's thickness is controlled within a specific range (0.1-1.0 mm) to ensure proper spacing between the ink ribbon roll and laminating tape roll, thereby achieving the required positioning precision only where necessary without increasing overall manufacturing complexity.
3Length of moving object
If the ink ribbon roll and laminating tape roll are positioned to overlap the printing tape roll, then the cassette width is reduced, but the component arrangement complexity increases
Solution Approach 1:
The patent implements nesting by positioning the ink ribbon roll and laminating tape roll such that their projections overlap with the printing tape roll in the width direction. The ink ribbon roll is placed at the rear side of the recess, while the laminating tape roll is positioned at the front side, both within the recess boundaries. This nested configuration reduces the cassette's overall width while the systematic arrangement within the recess maintains manageable component arrangement complexity.
Solution Approach 2:
The patent segments the recess into distinct zones: the rear side accommodates the ink ribbon roll, the front side accommodates the laminating tape roll, and the bottom provides spacing functionality. This segmentation of the recess space into functionally distinct regions simplifies the overall component arrangement by assigning specific areas to specific components, thereby reducing arrangement complexity despite the overlapping configuration.
Data Source
AI summary
A cassette includes a printing tape roll being rotatable and into which a printing tape as a medium to be printed is wound, and an outer peripheral wall disposed on one side in a first direction relative to the printing tape roll. The first direction is a width direction of the printing tape. The outer peripheral wall includes a first side wall extending in a second direction orthogonal to the first direction, a second side wall extending in a third direction orthogonal to the first direction and intersecting with the second direction, and a recess wall defining a recess extending from the second side wall toward one side in the second direction. The recess extends in the third direction on one side in the second direction further than the second side wall. At least a portion of the recess overlaps the printing tape roll in the first direction.