Drive device for moving a displaceable part of a piece of furniture and a fitting arrangement and furniture comprising such a drive device
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Solution Overview
Problem
Existing drive devices for moving furniture parts between closing and opening positions either require significant installation space or lack the flexibility to be manually operated, limiting their compactness and usability.
Innovation Solution
A drive device comprising a motor swiveled via a bearing arrangement, a first threaded element driven by the motor, a second threaded element that translates with the first, and an actuator with stops, allowing for compact installation and manual operation, featuring a hardware element connected to the movable part and a spring-loaded holding arrangement to fix the part in the open position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a motor-driven actuator with gear mechanism is used to move the furniture part, then the furniture part can be automatically opened and closed, but the installation space required increases
Solution Approach 1:
The actuator is designed with a nested structure where the second threaded element is received within the actuating element, and the gear mechanism is integrated within the compact housing. This nesting arrangement allows multiple components to occupy overlapping spatial volumes, significantly reducing the overall installation footprint while maintaining the motorized automation function
Solution Approach 2:
The pivot axis of the actuator is oriented perpendicular to the axis of movement of the threaded elements, creating a compact L-shaped spatial arrangement. This dimensional reorientation allows the gear mechanism and threaded elements to be arranged in different spatial planes, reducing the linear space required for installation
2Ease of operation
If a complex gear mechanism is used to enable manual operation, then the furniture part can be opened manually, but the device complexity increases
Solution Approach 1:
The mechanism incorporates a self-locking feature through the engagement between the first and second threaded elements, which maintain positional stability without requiring additional locking components. The spring element automatically provides holding force to maintain the furniture part in the open position, eliminating the need for complex manual locking mechanisms
Solution Approach 2:
The spring element is extracted as a separate functional component that independently provides the holding force, simplifying the overall mechanism by separating the holding function from the actuation mechanism. This allows the gear and threaded elements to focus solely on movement transmission without integrated locking complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables a compact drive device that occupies minimal space, allowing for efficient movement of furniture parts between positions while allowing for both motorized and manual operation, thereby increasing usable space and convenience.
Implementation Method 1
a first threaded element (12) that can be driven by the motor (13), and a second threaded element (11) that engages with the first threaded element (12), wherein the second threaded element (11) is displaced translationally along the first threaded element (12) when the first threaded element (12) is rotated
Data Source
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AI summary
Drive device for moving a movable part of a piece of furniture (17) between a closed and an open position, comprising: a motor (13) which is pivotably connected to a body (18) of the furniture (17) via a bearing arrangement (14), a first threaded element (12) which can be driven by the motor (13) in a rotary manner, and a second threaded element (11) which is engaged with the first threaded element (12), wherein the second threaded element (11) is displaced translationally along the first threaded element (12) when the first threaded element (12) is rotated, and an actuating element (6) which is displaceably arranged relative to the first threaded element (12) along an axis of movement (B) and has a first stop (8) and a second stop (8), wherein the second threaded element (11) is axially adjustable relative to the actuating element (6) between the first stop (8) and the second stop (8) of the actuating element (6), and a fitting element (2).which is pivotably connected to the adjusting element (6) and connectable to the movable furniture part (19).