Barcode Printer Label Roll Retainer with Adjustable Locking Mechanism
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Solution Overview
Problem
Conventional barcode printers are limited by their inability to securely retain label rolls of varying diameters and lengths, leading to potential loosening and compromised printing quality.
Innovation Solution
A label roll positioning device featuring slide rails, positioning rails with teeth, and roll retainers with adjustable locking plugs, allowing for secure retention of label rolls of different sizes by sliding and locking mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional label roll retaining mechanism is used, then the structure is simple, but it can only retain label rolls of fixed diameter and length, limiting adaptability
Solution Approach 1:
The patent employs dynamic components including slide rails that allow linear movement, positioning plugs with spring-loaded locking sections that can engage or disengage from teeth, and roll retainers that can slide along the rails. This dynamic structure enables the device to adapt to different label roll sizes by adjusting the position of retainers along the slide rails, resolving the contradiction between adaptability and structural simplicity
Solution Approach 2:
The positioning device serves multiple functions: the slide rails provide both guidance and adjustment capability, the positioning plugs provide both positioning and locking functions, and the roll retainers can accommodate various diameters and lengths of label rolls. This multi-functionality allows a single device structure to handle diverse label roll specifications, improving adaptability without proportionally increasing complexity
2Reliability
If a conventional label roll retaining mechanism is used, then the device complexity is low, but the label roll cannot be securely retained, affecting printing quality
Solution Approach 1:
The retaining mechanism is segmented into multiple independent components: slide rails for positioning, positioning plugs with locking sections for securing, and roll retainers for holding the label roll. This segmentation allows each component to perform its specific function effectively, with the locking sections engaging with teeth on the positioning rails to provide secure retention, while maintaining manageable structural complexity through modular design
Solution Approach 2:
The positioning plugs incorporate spring-loaded locking sections that automatically engage with the teeth on the positioning rails when the roll retainers are positioned, providing self-locking functionality. This self-service mechanism ensures secure retention of the label roll without requiring additional actuators or complex control systems, achieving reliability while controlling complexity
Data Source
AI summary
A label roll positioning device is provided for a barcode printer and includes at least one slide rail, at least one positioning rail, and at least one pair of roll retainers. The slide rail and the positioning rail are arranged in a parallel manner inside a housing of the barcode printer. The positioning rail forms teeth on a surface thereof. At least one of the roll retainers has a bottom forming a mounting portion that is slidably fit and mounted to the slide rail for being slidable along the slide rail. The roll retainers are spaced to receive a roll of label therebetween in a securely held manner. The roll retainer is provided therein at least one positioning plug having an end forming a locking section. The positioning plug can be downward driven to have the locking section downward projecting out of the roll retainer, and the positioning plug can be upward driven to have the locking section back into concealment inside the roll retainer. Thus, with the roll of label received between the roll retainers, the positioning plug is downward driven and the locking section engages the teeth of the positioning rail to effect positioning and fixing for securely holding the roll of label between the roll retainers. A positioning device with movable and adjustable locking engagement can be realized.