Wall Cabinet Flap Door Design for Continuous Lower-Box Access

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Solution Overview

Problem

Conventional wall-mounted cabinets, particularly kitchen cabinets, are inaccessible for storing pots and pans and kitchen utensils unless the cabinet door is open, limiting flexibility and accessibility.

Innovation Solution

The design incorporates tilt fittings for a flap door with an inner and outer panel that extends across the upper front region of the cabinet carcass, ensuring the lowermost cabinet box is always accessible, while other boxes are accessible only when the door is open, with fixed and lowerable front coverings for a flush closure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a conventional cabinet door is used, then the cabinet boxes are protected when closed, but they become inaccessible for storage without opening the door

Engineering Contradiction:
ImproveAccessibility of cabinet boxesVSAvoidCabinet door structure
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The cabinet door is segmented into a flap door portion and a fixed panel portion. The flap door can be opened independently to access the lowermost cabinet box, while the fixed panel remains closed to protect the upper cabinet boxes. This segmentation allows selective access without requiring the entire door to be opened.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The flap door is designed to be movable and tiltable, allowing it to transition between closed and open positions independently of the main cabinet door. This dynamic element enables continuous access to the lowermost cabinet box while maintaining the protective function of the upper cabinets.

Inventive Principle:
Principle #15Dynamics

2Ease of operation

If the cabinet door is always open for accessibility, then all cabinet boxes are always accessible, but the cabinet loses its closed protective function and aesthetic appearance

Engineering Contradiction:
ImproveAccessibility of cabinet boxesVSAvoidClosed appearance of cabinet
Core Design Contradiction:
Ease of operationVSShape

Solution Approach 1:

The cabinet door is divided into a movable flap door and a fixed panel. The fixed panel maintains the closed aesthetic appearance of the cabinet, while the flap door provides selective access to the lowermost cabinet box without requiring the entire door to be opened.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Only the lowermost cabinet box is designed to be accessible through the flap door, while the upper cabinet boxes remain protected by the fixed panel. This local differentiation allows specific areas to have different accessibility qualities based on their functional requirements.

Inventive Principle:
Principle #3Local quality

3Ease of operation

If tilt fittings are mounted on the side walls, then the flap door can be tilted for access, but the tilt fittings create gaps and disrupt the flush appearance

Engineering Contradiction:
ImproveAccessibility of lowermost cabinet boxVSAvoidFlush closure of cabinet
Core Design Contradiction:
Ease of operationVSShape

Solution Approach 1:

The tilt fittings are extracted from the side walls and repositioned to the inner sides of the side walls in the upper region of the cabinet carcass. This extraction allows the flap door to tilt for access while keeping the outer appearance flush and uninterrupted.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

Inner walls are introduced as intermediary elements that cover the tilt fittings and connect the flap door mechanism to the cabinet structure. These inner walls hide the mechanical components from view while still allowing the flap door to function properly.

Inventive Principle:
Principle #24Intermediary (Mediator)

4Ease of operation

If the outer panel extends far down for easy grasping, then the door is easier to open, but it protrudes more from the cubicles

Engineering Contradiction:
ImproveGrasping of flap doorVSAvoidProtrusion from cubicles
Core Design Contradiction:
Ease of operationVSLength of stationary object

Solution Approach 1:

The outer panel is designed with differentiated extension: it extends far enough down to provide an easily graspable surface for opening the flap door, but is positioned to minimize protrusion from the cubicles. This local optimization balances ergonomics with aesthetic integration.

Inventive Principle:
Principle #3Local quality

Data Source

PatentUS10588407B2Wall cabinet, in particular a kitchen wall cabinet
Publication Date: 2020.03.17 FORM ORANGE PRODNTWICKLUNG
  • US10588407B2 patent drawing
  • US10588407B2 patent drawing
  • US10588407B2 patent drawing

AI summary

The invention relates to a wall-mounted cabinet having a block-shaped cabinet carcass, the open front side of which can be closed with at least one cabinet door that is hinged to the cabinet carcass and is flush with the outer sides of the vertical side walls and of the horizontal top wall of the cabinet carcass in the closed position of the cabinet door, in particular a wall-mounted kitchen cabinet. In order for the wall-mounted cabinet to have at least one cabinet box, which regardless of whether the cabinet door is open or closed is always accessible for putting pots and pans, kitchen utensils, and the like in it and storing them, the invention provides that tilt fittings for a cabinet door embodied as a flap door are mounted on the inner sides of the side walls in the upper region of the cabinet carcass; that the tilt fittings are covered by inner walls; that the flap door is composed of an inner panel and an outer panel, which extends across an upper front region of the cabinet carcass from the outside of the top wall of the cabinet carcass to the top side of the lower cabinet box and with which the lowerable front coverings between the inner walls and the side walls of the cabinet carcass are associated; that the outer panel of the flap door extends at least across a lower region of the front side of the inner panel and extends as far as the top side of the lowermost cabinet box of the cabinet carcass; and that fixed front coverings, adjacent to lowerable front coverings, extend to the underside of the lowermost cabinet box of the cabinet carcass between the inner walls and the side walls of the cabinet carcass and are flush with the ends of the inner walls and of the side walls of the cabinet carcass.