Precut wiping material dispenser, method for implementing and method for adjusting such a dispenser
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Solution Overview
Problem
Existing dispensers for precut wiping materials face issues with the strip of material returning backwards or rising due to user pulling force, leading to inefficiency and user inconvenience, especially when the material becomes inaccessible.
Innovation Solution
A dispenser design featuring a module with a rainbow-shaped profile flap and plate, along with a clearance system of transverse rods and receptacles, and adjustable springs that temporarily narrow the space between the flap and plate, increasing frictional forces to prevent the strip from returning and ensure smooth dispensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a guiding device is used to guide the strip unwound from the reel, then the strip can be directed to the outlet passage, but the strip returns backwards and rises due to swinging movement when a user pulls on it
Solution Approach 1:
The flap is positioned to preliminarily counteract the backward movement of the strip before it can rise and become inaccessible. When the user pulls the strip, the flap swings in response and creates frictional forces that prevent the backward return movement, addressing the instability issue before it fully manifests
Solution Approach 2:
The flap is designed as a dynamic element that can swing between different positions. It moves from its initial position to a swung position in response to user pulling force, and the clearance system allows dynamic adjustment of the space between the flap and plate to maintain control over the strip during dispensing operations
2Reliability
If the space between the flap and plate is fixed, then the structure is simple, but the frictional forces are insufficient to prevent strip return when users pull on it
Solution Approach 1:
The clearance system is segmented into multiple independent components: transverse rods, receptacles with longitudinal and vertical parts, and adjustable springs. Each component performs a specific function in controlling the space between the flap and plate, allowing for precise adjustment of frictional forces without creating a monolithic complex structure
Solution Approach 2:
The clearance system enables dynamic parameter changes in the space between the flap and plate. By adjusting the position of the transverse rods within the receptacles and modifying spring forces, the frictional characteristics can be tuned to match different wiping material properties, transforming a static structure into an adaptable system
3Reliability
If the flap and plate are positioned close together, then frictional forces increase to prevent strip return, but the space for guiding and clamping the strip becomes too narrow
Solution Approach 1:
The receptacles are designed with both longitudinal and vertical parts, creating a two-dimensional adjustment space for the transverse rods. This allows the system to optimize the gap between the flap and plate in one dimension (longitudinal) while maintaining adequate guiding space in another dimension (vertical), effectively using dimensional freedom to resolve the contradiction
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 solution effectively prevents the strip from moving back towards the reel, ensuring easy access and use, regardless of the material's thickness or characteristics, by combining pulling force with frictional forces to separate and clamp the strip, thus enhancing user experience and ease of operation.
Implementation Method 1
the clearance system makes it possible to temporarily narrow the space defined between the flap and the plate, and therefore temporarily increase the frictional forces exerted between the strip, the flap and the plate in said space
Data Source
AI summary
The present invention concerns a dispenser for dispensing precut wiping material, in the form of a reel that can be unwound as a strip. The dispenser comprises a housing, a cover and a module. The module comprises two side walls, a guide device, a flap and a plate. A space for guiding and clamping the strip is delimited between the flap and the plate. The module comprises a system providing relative clearance between the flap and the plate, varying the configuration of said space. The clearance system comprises four transverse rods formed projecting from the side edges of the flap, with two spaced-apart rods per side edge, and four housings provided in the side walls, with two housings per side wall. Each housing receives one of the rods and comprises a longitudinal part and a vertical part. A clearance is thus defined longitudinally and vertically between each rod and the corresponding housing.