Hollow Hinge Door Assembly for Concealed Cabinet Cable Routing
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Solution Overview
Problem
Illuminated mirror-fronted cabinets face issues with unsightly and hazardous trailing electrical cables between the door and the cabinet body, which require careful safety design to prevent water ingress and snagging.
Innovation Solution
A door assembly with a hinge system that includes a hollow extruded channel and pin configuration, allowing a concealed and protected passage for the power cable from the cabinet body into the door, using an extruded aluminium strip with a T-shaped internal channel and threaded pins to secure the hinge elements, ensuring the cable is routed internally and concealed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a trailing cable arrangement is used to supply power to the illuminated mirror, then the cable can be easily connected, but the cable becomes unsightly and hazardous with risk of snagging and water ingress
Solution Approach 1:
The cable is nested within the hollow hinge pin, which is itself nested within the hinge assembly. The hinge pin acts as a protective sleeve that contains the cable, routing it through the interior hollow space of the pin from the cabinet body to the door, thereby concealing and protecting the cable while maintaining connection ease
Solution Approach 2:
The hollow hinge pin serves as an intermediary structure between the cabinet body and the door, providing a protected pathway for the cable. Rather than allowing the cable to trail externally, the pin mediates the cable's passage by enclosing it within its hollow interior, thus eliminating direct exposure to snagging and water ingress hazards
2Reliability
If careful safety design is implemented to prevent water ingress and snagging, then safety is improved, but the design complexity and manufacturing difficulty increase
Solution Approach 1:
The hinge assembly merges multiple functions into a single integrated structure: the hollow pin simultaneously serves as the rotational pivot for the door and as the protective conduit for the cable. This consolidation eliminates the need for separate cable management components, reducing overall design complexity while maintaining safety
Solution Approach 2:
The hollow hinge pin performs multiple functions: it acts as the mechanical pivot for door rotation, provides structural support for the hinge assembly, and serves as a protective conduit for the power cable. This multi-functionality reduces the number of separate components needed, simplifying the overall design while ensuring cable protection
3Shape
If the cable is concealed within the hinge assembly, then the appearance is improved and safety is enhanced, but the manufacturing precision requirements increase
Solution Approach 1:
The hollow hinge pin is finished with a chrome plating that matches the aesthetic appearance of other bathroom fittings. This表面处理 (surface treatment) ensures that the hinge assembly, which now conceals the cable, maintains a neat and visually appealing appearance that blends with the surrounding environment
Data Source
AI summary
A door assembly comprises a door (1) and second body (2) each having an internal cavity and pivotably secured together by a hinge (3) with an internal channel. Another door assembly comprises a first and second body each having an internal cavity, a hinge projecting from the first body and having an internal channel in fluid connection with the first body cavity, a pin projecting from the second body into the hinge channel to pivotably secure the hinge and second body together such that the hinge channel and second body cavity are in fluid connection. Each assembly is adapted to receive a conduit (6) connecting the internal cavities via the hinge channel. In each assembly, the second body comprises an extruded hollow panel including a substantially cylindrical extruded channel that aligns with the hinge channel to form a continuous shaft. A cabinet including such a door assembly is also described.