Furniture Ejection Locking Mechanism for Push-Pull Release
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Solution Overview
Problem
Conventional lockable ejection devices with cardioid cam tracks can only be opened by pushing, as the latching element cannot escape from the heart-shaped link track when the furniture part is pulled, limiting functionality.
Innovation Solution
A lockable ejection device design where a detection device engages a rotary element that can rotate in both opening and closing directions, allowing the locking element to be released when the furniture part is pushed or pulled, with a rotary element that serves as the locking element or is separate from it, using springs and guide elements to facilitate movement detection and unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cardioid cam track is used for locking the ejection device, then the structure is simple and the locking is reliable, but the device can only be opened by pushing and not by pulling
Solution Approach 1:
The patent applies the dynamics principle by making the locking element movable rather than fixed. The locking element can shift position within the cardioid cam track based on the direction of force applied. When pulled, the locking element moves to a different position in the track that allows engagement, enabling bidirectional operation while maintaining the simple cardioid cam track structure
Solution Approach 2:
The patent changes the parameter of the locking element's position within the cardioid cam track. By allowing the locking element to occupy different positions in the track depending on whether the drawer is being pushed or pulled, the system achieves versatile opening directions while maintaining structural simplicity and reliability
2Device complexity
If the latching element is held in a trough of a heart-shaped slideway, then the locking mechanism is compact and simple, but it cannot escape from the latching recess when pulled
Solution Approach 1:
The patent makes the locking element dynamic by allowing it to move within the heart-shaped slideway. Instead of being fixed in the trough, the locking element can shift to different positions in the slideway depending on the direction of pull or push, enabling it to escape the latching recess when pulled while maintaining a compact and simple locking mechanism
3Adaptability or versatility
If different unlocking mechanisms are used for pushing and pulling, then both directions can be unlocked, but the device complexity increases
Solution Approach 1:
The patent applies universality by making the locking element serve multiple functions within a single mechanism. The same locking element engages with the cardioid cam track for both pushing and pulling operations, eliminating the need for separate unlocking mechanisms while achieving bidirectional unlocking capability
Solution Approach 2:
The patent merges the unlocking functions for pushing and pulling into a single integrated locking element that operates within the cardioid cam track. By combining both unlocking actions into one mechanism rather than using separate mechanisms, the patent achieves bidirectional capability without increasing device 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
Enables the ejection device to be unlocked consistently when pushed or pulled, ensuring the locking element moves uniformly in both directions, enhancing the usability and functionality of the device.
Implementation Method 1
an energy accumulator, by means of which the path of the ejection element in the opening direction can be blocked at least in the closed position of the movable furniture part
Data Source
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AI summary
The present invention relates to a lockable ejection device (1) for a movable furniture part (2), having an ejection element (3) acting on the movable furniture part (2) in an opening direction (OR), a housing (4) and a locking element (5) arranged in or on the housing (4), by means of which locking element, at least in the closing direction (SS) of the movable furniture part (2) the path of the ejection element (3) in the opening direction (OR) can be blocked, wherein, both when excess pressure is applied to the movable furniture part (2) from a closed position (SS) in the closing direction (SR) and when the movable furniture part (2) is pulled from the closed position (S) in the opening direction (OR), the ejection element (3) can be released by the locking element (5), wherein, both when excess pressure is applied to the movable furniture part (2) and when the movable furniture part (2) is being pulled, the ejection element (3) can be unlocked by a movement of the locking element (5) relative to the housing (4).