Spring-Loaded Spindle Assembly for Coreless Tissue Roll Dispensers
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Solution Overview
Problem
Conventional sheet product dispensers, particularly in hotels and high-end office spaces, often inefficiently dispense tissue paper, leading to wastage and expose rolls to splashing, while aesthetically unpleasing, prompting the need for improved dispensers that address these issues and perceptions.
Innovation Solution
The introduction of new spindles and cover assemblies designed for coreless sheet product rolls, featuring hollow cylindrical bodies with springs and friction hubs, which reduce wastage by controlling the dispensing mechanism and aesthetically please by concealing the roll, thus enhancing user perception of hygiene.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If conventional core-based tissue rolls are used in dispensers, then the dispenser structure is simple, but tissue wastage increases due to freespinning and the rolls are exposed to splashing
Solution Approach 1:
The dispenser system is segmented into distinct functional components: a spindle assembly with spring mechanism for controlled rotation, a cover assembly with splash shield, and a tissue roll. This segmentation allows each component to address specific problems - the spindle controls dispensing to reduce wastage, while the cover protects against splashing, achieving both goals without excessive complexity
Solution Approach 2:
A cover assembly acts as an intermediary between the external environment and the tissue roll. This intermediary component provides a splash shield that protects the roll from water exposure while maintaining aesthetic appearance, resolving the contradiction between simplicity and protection
2Ease of manufacture
If coreless sheet product rolls are used, then aesthetic appearance and hygiene perception improve, but the dispenser mechanism becomes more complex
Solution Approach 1:
The spindle and cover assemblies are merged into an integrated unit that works together to support coreless rolls. The spindle provides structural support and controlled dispensing, while the cover provides aesthetic enclosure and splash protection. This merging achieves improved appearance and hygiene perception while managing the complexity through unified design
Solution Approach 2:
The system transitions from supporting core-based rolls to coreless rolls by changing the structural parameters of the dispenser. The spindle assembly is designed with specific dimensional parameters to accommodate coreless rolls, and the cover assembly is configured to provide aesthetic enclosure, achieving improved appearance while managing complexity through parameter optimization
3Ease of operation
If the rod is permitted to translate freely within the hollow cylindrical body, then ease of assembly improves, but the rod may fall out of the body
Solution Approach 1:
The rod assembly incorporates a spring mechanism that provides dynamic retention. The spring allows the rod to translate freely during assembly for ease of installation, while automatically exerting a retaining force to prevent the rod from falling out during operation, thus balancing ease of assembly with reliability
Solution Approach 2:
The spring mechanism provides self-service retention by automatically exerting force to keep the rod in place within the hollow cylindrical body. This self-acting mechanism eliminates the need for additional complex retention structures, maintaining ease of assembly while ensuring reliable rod retention through the spring's inherent elastic properties
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 improved spindles and cover assemblies reduce tissue wastage, save labor costs, minimize mess, and enhance user perception of hygiene by efficiently dispensing sheet products while maintaining a clean appearance.
Implementation Method 1
a spring disposed within the hollow cylindrical body and having one end in biasing contact with an end of the rod disposed within the body
Implementation Method 2
a friction hub disposed around the hollow cylindrical body between ends of the body, the friction hub being rotatable around the body
Data Source
AI summary
Spindles and cover assemblies for dispensing sheet product for use with coreless sheet product rolls. The spindle may include a hollow cylindrical body, which may have an elongated channel in a sidewall; a rod which extends partially out of the body; and a spring disposed within the body in biasing contact with the rod. The rod may include a flexible tab matingly engaged within the channel, permitting the rod to translate within the hollow cylindrical body without falling out. The hollow cylindrical body may have an end with an opening bounded by an inward facing ledge, and the rod may include a radial ledge, such that the rod can translate within the body but cannot fall out due to interference between the inward facing ledge and the radial ledge. The spindle may include a friction hub disposed about and rotatable around the hollow cylindrical body between ends of the body.