Cantilever Track with Sensor for Refrigerator Shelf Load Detection
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Solution Overview
Problem
Existing refrigerator shelf support structures with integrated sensors are costly and bulky, necessitating an improvement in sensor placement and support design for efficient weight measurement.
Innovation Solution
A cantilever track system with a pair of track arms and a sensor attached, featuring a member with openings for tooth-like support arms of the shelf, allowing for improved sensor placement and communication with a controller for load measurement, enabling efficient weight detection and user feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors are integrated into the support structure, then weight measurement capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces complex integrated sensor systems with a simple mechanical lever arm mechanism. The lever arm pivots about a fulcrum, translating shelf weight into angular displacement that can be detected by simple limit switches or position sensors, eliminating the need for complex force-sensitive sensors while maintaining measurement capability
Solution Approach 2:
The invention uses inexpensive mechanical components (lever arms, fulcrums, limit switches) instead of expensive electronic sensors. These simple mechanical elements can be easily replaced if needed, reducing both initial cost and long-term maintenance expenses
2Measurement precision
If sensors are integrated into the support structure, then weight measurement capability is improved, but the support structure becomes bulky
Solution Approach 1:
The patent replaces bulky electronic sensor assemblies with thin, flat lever arms that pivot on small fulcrums. This mechanical approach achieves weight detection without requiring the volumetric space needed for electronic sensors and their mounting structures
Solution Approach 2:
The lever arm mechanism transforms the weight measurement problem from a direct force measurement (requiring bulky sensors) into an angular displacement measurement. The lever arm rotates about a fulcrum, converting vertical weight force into rotational motion that occupies minimal space
3Ease of operation
If a tooth insertable into opening is used for shelf mounting, then ease of installation is improved, but device complexity increases
Solution Approach 1:
The patent divides the mounting system into separate, modular components: the track with openings, the lever arm with tooth, and the shelf with mounting arms. This segmentation allows each component to be simple in design while providing easy installation through modular assembly, reducing overall system complexity
Data Source
AI summary
An appliance including a cabinet forming a chamber. A track is attachable to the cabinet in the chamber. The track includes a pair of track arms at which a sensor is attached. A member extends between the pair of track arms, and an opening is formed at the member. A shelf includes a pair of support arms at which a frame is positionable. A mounting end of the support arms forms a tooth insertable into the opening at the track.