Tape Cassette Upstream Restriction Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Tapes discharged from existing tape cassettes can be pushed upstream, causing the printing tape and double-sided adhesive tape to bend and deviate from their paths, leading to incorrect discharge and printing issues.
Innovation Solution
A tape cassette design featuring a cylindrical tape feed roller, a laminated tape restricting member with a channel, and an adhesive tape restricting member that guides and restricts the movement of the double-sided adhesive tape, ensuring it remains on its path and prevents unlimited upstream movement, thereby maintaining the integrity of the tape feed paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the tape cassette allows free movement of the tape, then the tape can be easily fed and discharged, but the tape may be pushed upstream and bend off the feed path
Solution Approach 1:
The restricting member is divided into a first member and a second member that are movable relative to each other, creating a segmented structure that can dynamically adjust to tape movements while maintaining path stability
Solution Approach 2:
The restricting member transitions from a static structure to a dynamic one where the first and second members can move relative to each other, allowing the system to adapt to upstream pushes while preventing excessive tape displacement
2Reliability
If the tape is constrained to prevent upstream movement, then the tape path stability is improved, but the device complexity increases
Solution Approach 1:
The restricting member utilizes the tape's own movement to trigger the relative motion between the first and second members, making the system self-regulating without requiring external control mechanisms
Solution Approach 2:
The restricting member is pre-configured to automatically oppose upstream movements of the tape before significant displacement occurs, preventing the problem rather than correcting it
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The double-sided adhesive tape 58 is fed along an outer circumference surface 45 of the tape feed roller 46 toward a tape channel 63. A restricting wall 43 is provided apart from the outer circumferential surface 45 by a distance L2. Although the double-sided adhesive tape 58 bends in a radially outward direction of the tape feed roller 46 when a force toward an upstream side in a feed direction is applied, its movement is restricted by the restricting wall 43. A maximum length of the tape that can be pushed upstream is generally equal to the distance L2. Because a length L1 of the tape channel 63, through which the double-sided adhesive tape 58 affixed to a film tape 59 is fed as a laminated tape 50, is longer than the distance L2, the laminated tape 50 can be prevented from coming out of the tape channel 63.