Furniture Ejection Coupling Mechanism for Pull-Open Lock Retention
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Solution Overview
Problem
Existing drive devices for furniture parts fail to maintain a coupling position when opened by pulling, leading to inefficient operation and requiring additional unlocking steps during closure.
Innovation Solution
A drive device with a locking lever and locking pin, allowing the coupling device to move independently of the ejection device when opened by pulling, and remaining in a coupling position during the initial opening path, enabling free movement without spring loading and eliminating the need for unlocking during closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the coupling device remains in a coupling position when the movable furniture part is opened by pulling, then the operational efficiency is improved and additional unlocking steps are eliminated, but the device complexity increases due to the independent movement mechanism
Solution Approach 1:
The drive device is divided into functionally independent components: the ejection device (with locking lever and locking pin) and the coupling device. This segmentation allows each component to perform its specific function independently - the ejection device manages the ejection/locking function while the coupling device maintains the coupling position, thereby improving operational efficiency without requiring additional unlocking steps.
Solution Approach 2:
The coupling device is designed to move independently relative to the ejection device when the movable furniture part is opened by pulling. This dynamic independence allows the coupling device to remain in the coupling position during pulling operations, eliminating the need for additional unlocking steps and improving overall operational efficiency.
2Reliability
If the ejection device remains locked when opened by pulling, then the reliability of the locking function is improved, but the ease of operation deteriorates due to the restricted movement
Solution Approach 1:
The drive device is segmented into independent ejection device and coupling device components. The ejection device maintains its locking function reliability by keeping the locking pin engaged with the locking lever, while the coupling device handles the movement aspect, allowing the system to maintain reliability without compromising ease of operation.
Solution Approach 2:
The coupling device acts as an intermediary between the user's pulling action and the ejection device. It absorbs the movement requirements, allowing the ejection device to remain locked while the coupling device moves independently, thus maintaining both reliability and ease of operation.
3Ease of operation
If the coupling device can move freely from spring loading during closing, then the ease of operation is improved, but the loss of energy increases due to the uncontrolled movement
Solution Approach 1:
The coupling device is designed with dynamic movement capabilities that allow it to move freely during closing operations without being constrained by spring loading. This dynamic freedom improves ease of operation while the system's overall energy management prevents excessive energy loss.
Solution Approach 2:
The coupling device is designed to automatically return to its proper position during closing operations through its own mechanical characteristics rather than requiring external spring loading. This self-service capability improves ease of operation while minimizing energy loss by eliminating the need for additional spring mechanisms.
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
Enables the ejection device to remain locked when opened by pulling, while maintaining the coupling position, allowing seamless operation and eliminating the need for additional unlocking steps during closure, enhancing the functionality and efficiency of the drive device.
Implementation Method 1
the coupling device can be moved freely from a spring loading of an overload spring
Data Source
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AI summary
The invention relates to a drive device (1) for a furniture part (3) which can be displaced in a furniture body (2), comprising an ejection device (4) which can be locked in a locked position (V), said ejection device being used to move the moveable furniture part (3) from a closed position (SS) into an open position (OS). The ejection device (4) can be unlocked by pushing the movable furniture part (3) so that it moves into a pushed-in position (ÜS) which is beyond the closed position (SS) in the closing direction (SR), this enables the ejection device (4) to move the moveable furniture part (3) in the opening direction (OR); the moveable furniture part (3) can also be moved from the closed position (SS) into the open position (OS) by pulling said moveable furniture part (3), the ejection device (4) remaining in the locked position (V) when opened by pulling. Said drive device also comprises a coupling device (5) for coupling the drive device (1) to the moveable furniture part (3) or to the furniture body (2), when ejecting the moveable furniture part by means of the ejection device (4), the coupling device (5) assumes the coupling position (K), when opening by pulling, the coupling device (5) can be freely moved with respect to the ejection device (4).