Recessed Door Handle Structure for Three-Dimensional Mounting Firmness
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Solution Overview
Problem
Existing recessed handles in refrigeration devices are not firm due to being fastened in only two dimensions, leading to poor stability and increased assembly workload.
Innovation Solution
A door structure with an opening in both the front and side panels, featuring an insertion-receiving structure with projecting tongues and grooves that limit the handle in multiple dimensions, enhancing firmness and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a recessed handle is mounted on a single panel, then the assembly process is simple, but the firmness and stability of the handle is poor
Solution Approach 1:
The patent transitions from mounting the handle on a single panel (2D fixation) to mounting it across two adjacent panels (3D fixation). The opening is formed partially in the front panel and partially in the side panel, creating a multi-dimensional mounting structure that significantly improves handle firmness while maintaining assembly simplicity through the integrated insertion-receiving structure.
2Device complexity
If a recessed handle is mounted on a single panel, then the structure is simple, but the stability of the handle is insufficient
Solution Approach 1:
The mounting structure extends from a single panel to two adjacent panels, adding a spatial dimension to the fixation. The opening spans both the front panel and side panel, creating a stable triangular support geometry that inherently improves structural stability without requiring complex additional components.
Solution Approach 2:
The insertion-receiving structure integrates the mounting features for both panels into a single unified component. The flange with insertion portions combines the front panel receiving feature and the side panel receiving feature into one piece, simplifying the overall structure while achieving stable multi-point fixation.
3Ease of operation
If protruding handles are used, then the handle is easy to grip, but dust accumulates and the door structure becomes less concise
Solution Approach 1:
The handle is nested within a recessed groove formed in the door panel surface, rather than protruding outward. The recessed groove receives the handle body, creating a flush or semi-flush mounting that prevents dust accumulation while maintaining the recessed groove as a hand insertion feature for opening the door.
Solution Approach 2:
The harmful protruding portion that accumulates dust is extracted and replaced with a recessed configuration. The handle is positioned within a recessed groove rather than extending beyond the door surface, eliminating the dust-trapping protrusion while preserving the handle's functional grip area.
Data Source
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AI summary
A refrigeration device and a door structure for the refrigeration device are provided. In the door structure, an opening (10) of a door housing (1) is provided on a side panel (12) and a front panel (11) which are connected to each other; after a recessed groove (20) of a door handle (2) is placed into the opening (10), a flange (21) along an opening of the recessed groove (20) is connected to the front panel (11) and the side panel (12) by an insertion-receiving structure, where the insertion-receiving structure limits the door handle (2) at least in two perpendicular dimensions of a surface of the front panel (11) and in a third dimension perpendicular to the surface of the front panel (11), or limits the door handle (2) at least in two perpendicular dimensions of a surface of the side panel (12) and in a third dimension perpendicular to the surface of the side panel (12). The door structure in the refrigeration device can position the door handle in all three dimensions of a three-dimensional coordinate system, thereby enhancing the firmness of the door handle.