Furniture Hinge with Position-Limited Damping
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Solution Overview
Problem
Existing furniture hinges with hydraulic dampers provide damping over the entire pivoting range, which impedes door opening and have complex structures with limited tolerance compensation.
Innovation Solution
A furniture hinge design where the damper is only effective within an angular range of less than 45° before the closed position, utilizing a reversing lever and linkage to ensure damping occurs only when the door is closing, thus preventing slamming and maintaining easy door handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the damper is effective over the entire pivoting range of the lever, then damping is provided throughout the movement, but handling is impeded when the furniture door is open
Solution Approach 1:
The damper's effectiveness is made dynamic by using a reversible lever that changes its position based on the hinge's angular range. The lever is coupled to the damper such that it activates the damper only when the hinge is in the closing phase (within 45 degrees of the closed position), while remaining inactive during the opening phase, thus providing conditional damping based on real-time position
Solution Approach 2:
The system changes the operational parameter of the damper from continuous effectiveness to range-limited effectiveness. By using the reversible lever mechanism, the damper transitions between active and inactive states based on the angular position parameter, ensuring damping is provided only when needed (during closing) and not during opening operations
2Reliability
If a chain link is mounted on a projection of a lever to couple the damper, then the damper can be activated, but the structure becomes comparatively complex
Solution Approach 1:
The reversible lever serves multiple functions simultaneously: it acts as a structural component of the hinge mechanism, a position-sensing element, and a damper-activation mechanism. By merging these functions into a single integrated component, the design eliminates the need for separate chain links and projections, thereby reducing structural complexity while maintaining reliable damper activation
Solution Approach 2:
The reversible lever is designed as a multi-functional element that performs the roles of a hinge component, a position indicator, and a damper control mechanism. This universal approach allows one component to achieve multiple objectives, reducing the overall number of parts needed in the system and simplifying the overall structure
3Stability of the object's composition
If fixed axes of rotation are used for the levers, then the hinge structure is stable, but tolerance compensation is only possible to a limited extent
Solution Approach 1:
The system introduces dynamic adaptability through the reversible lever mechanism that responds to the actual angular position of the hinge. This dynamic response allows the damper activation to automatically adapt to variations in hinge geometry and assembly tolerances, while the fixed axes maintain structural stability during normal operation
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 provides sufficient damping to prevent door slamming while allowing unhindered opening and closing, simplifying the hinge structure and enhancing assembly ease by limiting damping to a necessary range, thus improving user experience and manufacturing efficiency.
Implementation Method 1
a damper (11) with a piston rod (12) which can be displaced relative to the housing (11) for damping the movement between the side part (3) and the hinge part (4)
Data Source
Figure 1A~1C
Figure 2A~2C
AI summary
A furniture hinge (1) comprises an installation plate (2) to which a side part (3) is fixed, and a hinge part (4) which is pivotable relative to the side part (3) between an open and a closed position and is articulated via a supporting lever (5) and a guide lever (6) in the manner of a parallel control arm, wherein a damper with a housing (11) and a piston rod (12) is provided in the side part (3) to damp the movement between side part (3) and hinge part (4), and wherein the damper (11, 12) is effective only in an angular range of less than 45° before the closed position of the hinge part (4). This improves the handling, with the damper preventing a furniture door from slamming shut.