Synthetic Resin Tape Transfer Roller Support for Label Printers
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Solution Overview
Problem
Conventional printing devices using metal for the tape drive cam support shaft and frame are costly and heavy, and when replaced with synthetic resin, they lack the necessary strength to maintain the tape transfer roller's position, leading to issues with pressing and discharging printed label tapes.
Innovation Solution
A printing device design featuring a first support shaft and frame made of synthetic resin, with a second support shaft on the opposite side of the frame, both integrated with gears to distribute pressure and maintain the tape transfer roller's position, allowing for smooth discharge of printed label tapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal is used for the tape drive cam support shaft and frame, then strength and load-bearing capacity are sufficient, but production cost increases and weight increases
Solution Approach 1:
The support shaft is divided into two separate support shafts positioned at opposite sides of the frame. This segmentation distributes the load across multiple points, allowing the use of lighter synthetic resin materials while maintaining structural strength and load-bearing capacity.
Solution Approach 2:
The patent employs synthetic resin materials for the support shafts and frame, combining material properties to achieve both lightweight construction and sufficient strength. The resin materials are selected and designed to provide the necessary mechanical properties for withstanding operational loads.
2Ease of manufacture
If synthetic resin is used for the tape drive cam support shaft and frame, then production cost decreases and weight decreases, but strength is insufficient causing the support shaft to tilt or the frame to warp
Solution Approach 1:
The single support shaft is segmented into two separate support shafts positioned at opposite sides of the frame. This distribution of support points prevents tilting and warping by evenly distributing the load, thereby enabling the use of synthetic resin materials that would otherwise be too weak to bear the full load alone.
Solution Approach 2:
The support structure transitions from a single-point support to a two-point support system across the frame width. This dimensional change in the support arrangement provides additional stability and prevents rotational tilting, allowing synthetic resin materials to maintain structural integrity under load.
3Weight of stationary object
If synthetic resin is used for the tape drive cam support shaft and frame, then weight decreases, but the tape transfer roller cannot be retained in appropriate position causing smooth pressing and discharge to fail
Solution Approach 1:
The support function is segmented into two separate support shafts positioned at opposite sides of the frame. This segmentation creates a stable support configuration that maintains the tape transfer roller in the appropriate position while using lightweight synthetic resin materials, thereby achieving both weight reduction and position retention reliability.
Data Source
AI summary
A printing device loads a tape cassette including a label, a tape transfer roller, and a shaft hole, and the printing device includes a first synthetic resin support shaft that is fitted in the shaft hole to support the tape transfer roller, a synthetic resin frame that anchors a lower part of the first support shaft, a second synthetic resin support shaft that stands on the frame on the opposite side of the first support shaft, a first gear that is provided on the second support shaft to be rotated by driving power from a motor in the printing device, a second gear that engages with the first gear and biased toward the first gear, and a press roller that includes the second gear, rotates, and is biased toward the first support shaft to hold the label between itself and the tape transfer roller and to discharge the label.