Dialysis Weighing Receptacle Guide Opening Alignment
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Solution Overview
Problem
Existing weighing devices for dialysis machines often experience incorrect liquid balancing due to improperly inserted bags for dialysate, substitute, and/or filtrate, which can protrude and touch adjacent containers, leading to inaccurate measurements.
Innovation Solution
The design incorporates receptacles with S-shaped guide openings that force containers into a defined position, preventing them from touching each other and ensuring correct alignment, thus eliminating incorrect balancing and simplifying handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If containers are placed in weighing pans without guidance structures, then the weighing device can accommodate various container types, but containers may protrude and touch adjacent containers causing incorrect measurements
Solution Approach 1:
The guide opening is designed in advance with a specific geometry that pre-determines the container's position and orientation before placement. This preliminary geometric constraint prevents protrusion and contact with adjacent containers, ensuring measurement accuracy without requiring complex active control mechanisms.
Solution Approach 2:
The guide opening acts as an intermediary structure between the container and the weighing pan. It mediates the placement process by providing a guided pathway that forces the container into the correct position, preventing direct contact with adjacent containers while maintaining a simple overall structure.
2Manufacturing precision
If guide openings are designed to force container alignment, then container positioning accuracy improves, but the receptacle size increases
Solution Approach 1:
The guide opening utilizes the vertical dimension by extending from the top surface downward into the weighing pan. This vertical arrangement allows the guide opening to provide lateral guiding constraints while minimizing the horizontal footprint, thus achieving precise positioning without significantly increasing the receptacle's overall volume.
3Ease of operation
If containers are freely inserted into weighing pans, then handling is simple, but incorrect liquid balancing occurs due to improper container placement
Solution Approach 1:
The guide opening is designed to automatically guide the container into the correct position during insertion. The container's own geometry interacts with the guide opening's geometry to self-align and self-position the container, eliminating the need for complex manual positioning procedures while preventing incorrect placement.
Data Source
AI summary
The invention relates to a weighing device (10) of a medical appliance comprising at least two receptacles (30) for containers (20) to be weighed, wherein the receptacles (30) each comprise a guide opening (34) in a side wall (32) which is formed in such a way that said guide opening causes a forced alignment of the containers (20) and/or prevents the overhang (22) of a container into another receptacle (30). The invention further relates to a receptacle for a weighing device, to a medical appliance having a weighing device, to a container suitable for use for a weighing device, and to a system comprising a weighing device.