Refrigerator Sub Door Handle Locking for Dual-Access Storage
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Solution Overview
Problem
Conventional refrigerators lack an efficient mechanism for external access to auxiliary storage compartments, often resulting in a cluttered appearance and difficulty in removing foreign objects caught between latch release buttons and through-holes, which compromises the sleek design and functionality.
Innovation Solution
A refrigerator design featuring a sub door with a handle that pivots to simultaneously open both the main door and sub door, utilizing a locking device with a hook member and catching protrusion, and an interlocking device with a push rod and pivoting member to unlock the main door, while maintaining a clean appearance by integrating the handle with the sub door.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a conventional latch release button mechanism is used for auxiliary storage compartment access, then the compartment can be accessed, but the appearance becomes cluttered and foreign objects can be caught between components
Solution Approach 1:
The handle is merged with the sub door structure, forming an integrated unit where the handle becomes part of the door assembly rather than a separate component. This eliminates the need for separate latch release buttons and through-holes, achieving a sleek appearance while maintaining functionality
Solution Approach 2:
The handle serves multiple functions: it acts as both a structural component of the sub door and a functional element for releasing the locking device. By making the handle multi-functional, the design eliminates the need for separate access mechanisms, resolving the contradiction between appearance and ease of operation
2Shape
If the handle is integrated with the sub door, then the appearance becomes sleek, but the mechanism for unlocking the main door becomes more complex
Solution Approach 1:
The interlocking device is nested within the sub door structure, with the pivoting member and push rod integrated into the door assembly. The locking device on the main door is designed to interface with this nested mechanism, allowing the handle to control both doors through a coordinated system that appears simple externally
Solution Approach 2:
The push rod acts as an intermediary element that transmits the pivoting motion of the handle to the locking device on the main door. This intermediary mechanism allows the integrated handle to control both doors without requiring direct mechanical connection, simplifying the overall design while maintaining functionality
3Productivity
If the handle pivots to open both doors simultaneously, then access efficiency is improved, but control over independent door opening is reduced
Solution Approach 1:
The system provides dynamic control options: the handle can be pivoted to open both doors simultaneously for efficient access, or the sub door can be opened independently by releasing the locking device first. This dynamic flexibility allows users to adapt the door opening sequence to their specific needs, resolving the contradiction between efficiency and versatility
Data Source
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AI summary
A refrigerator includes a cabinet (100) having a storage compartment provided therein, a main door (120) pivotably mounted at one side of the cabinet (100) for opening and closing the storage compartment, an auxiliary storage compartment (130) coupled to a rear of the main door (120), a sub door (110) pivotably mounted at one side of the main door (120) for opening and closing the auxiliary storage compartment (130), a locking device (200) for selectively coupling the main door (120) and the sub door (110) to each other, a handle (300) pivotably mounted at one side of the sub door (110) for pivoting and opening the main door (120) when pulled and releasing the locking device (200) when pushed, and a lock control device (400) mounted in the sub door (110) for lock control with operation of the handle (300) to release the locking device (200).