Refrigeration Cabinet Door Edging Profile for Finger Safety
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Solution Overview
Problem
Existing refrigeration cabinet doors have a manoeuvre space between edging profiles that is too wide when closed, posing a safety risk as users can insert their fingers into this space, leading to the risk of finger crushing when the door is rotated.
Innovation Solution
The introduction of a convex outer surface on the edging profiles with a radius of curvature parallel to the longitudinal axis reduces the manoeuvre space to less than 5mm, eliminating or drastically reducing the risk of finger crushing, while also allowing for a more stable and cost-efficient design by minimizing material consumption and providing a cavity for the hinge, which protects it from dirt and lubricants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If rectangular cross-section edging profiles are used, then the door structure is simple and easy to manufacture, but the manoeuvre space between doors is too wide (at least 1cm) creating safety risks
Solution Approach 1:
The edging profile is designed with a convex outer surface having a curvilinear shape with an axis of curvature parallel to the longitudinal axis of the profile. This curved geometry reduces the manoeuvre space between adjacent doors to less than 5mm when closed, eliminating the finger crushing hazard while maintaining manufacturing simplicity through extrusion processes
2Object-affected harmful factors
If the manoeuvre space is reduced to less than 5mm, then the safety risk is eliminated, but the door requires a more complex profile design
Solution Approach 1:
The convex outer surface with curvilinear geometry achieves the safety requirement of reducing manoeuvre space to less than 5mm. The curvature is designed with an axis parallel to the longitudinal axis, allowing the profile to be manufactured by standard extrusion processes, thus minimizing the increase in design complexity
3Object-affected harmful factors
If the convex outer surface is designed with minimum width greater than 20mm, then the manoeuvre space is minimized, but more material is consumed
Solution Approach 1:
The convex outer surface is designed with a curvilinear shape and minimum width greater than 20mm measured in the direction transversal to its longitudinal extension. This geometry effectively reduces the manoeuvre space to less than 5mm while the curved profile optimizes material distribution, achieving safety requirements with reasonable material consumption
Data Source
Figure 1
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AI summary
It is described a door (10,10') for a refrigeration cabinet (1), comprising: a panel (35) of the insulating and optically transparent type, and a support frame (90) supporting and framing the panel, wherein the support frame is provided with an edging profile (100,105,110,115) extending longitudinally along a longitudinal axis and comprising a portion proximal to the panel (35) and a portion distal from the panel, wherein the distal portion comprises a convex outer surface (150) parallel to the longitudinal axis and directed with convexity to a direction opposite to the panel (35).