Pivot Fitting with Damping Unit to Prevent Catch Position Overrun
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Solution Overview
Problem
Conventional pivot fittings for adjustable furniture parts, such as backrests and armrests, lack clear indication of the maximum adjustment position, often leading users to overrun this position, resulting in the catch mechanism becoming inactive, requiring users to reset and re-adjust.
Innovation Solution
A pivot fitting with a damping unit that increases the required adjustment force as it approaches the predetermined catch position, utilizing a catch mechanism and a force shaft coupled to the second lever, allowing users to easily identify the last catch position through differing force application, preventing overrunning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional pivot fitting is used, then the structure is simple, but the user cannot easily identify the last catch position and frequently overruns it
Solution Approach 1:
The patent employs visual indicators (such as colored markings or transparent elements) on the pivot fitting that change appearance or become visible at specific angular positions, allowing users to easily identify the last catch position without complex mechanical feedback mechanisms
Solution Approach 2:
The patent introduces an intermediary visual indication system that mediates between the mechanical catch mechanism and the user's perception, providing clear positional feedback without requiring direct mechanical interaction or complex sensing mechanisms
2Adaptability or versatility
If the user continues pivoting beyond the last catch position, then the adjustment range is maximized, but the catch mechanism becomes inactive requiring reset
Solution Approach 1:
The patent implements visual feedback mechanisms that inform the user when approaching or exceeding the last catch position, allowing the user to stop adjustment at the appropriate position and preventing inadvertent deactivation of the catch mechanism
Solution Approach 2:
The patent provides preliminary visual indication of the last catch position before the user reaches it, allowing the user to stop adjustment in advance and prevent overrunning the position that would deactivate the catch mechanism
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 damping unit enhances the user's ability to find and maintain the predetermined catch position accurately, preventing incorrect actuation and ensuring the catch mechanism remains active.
Implementation Method 1
A damping unit is arranged on the first lever of the pivot fitting, which is used for damping the pivot movement of the second lever in relation to the first lever in the adjustment direction
Implementation Method 2
The damping element is formed in this case as a spring element, in particular as a coil spring
Data Source
AI summary
A pivot fitting for moveable furniture parts on pieces of furniture has a first lever and a second lever mounted so as to pivot relative to each other about a common pivot axis from a basic position through a predetermined angle in an adjusting direction and a resetting direction, a latching mechanism, with which the two levers can be latched at different angular positions within the predetermined angle relative to each other counter to a force acting in the resetting direction, the levers being pivotable in the resetting direction when the latching mechanism is deactivated. A force-transmission shaft of the adjusting mechanism is coupled to the second level in a rotationally fixed manner. The latching mechanism can be deactivated by pivoting the second lever relative to the first lever in the adjusting direction when an end position has been reached. A damping structural unit is arranged on the first lever to damp the pivot movement of the second lever relative to the first lever in the adjusting direction from a predetermined adjusting angle.