Furniture Ejection Device with Blocking Element for Secure Closure
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Solution Overview
Problem
Existing drive devices for moveable furniture parts fail to ensure secure closure when the furniture is excessively pushed shut, as the ejection device is triggered or unlocked improperly, leading to insecure positioning.
Innovation Solution
A blocking element that moves into a blocking position to prevent unlocking of the ejection device when the furniture part is pressed beyond the closed position, allowing movement into the over-pressing position but preventing unlocking until a time-delayed release, ensuring secure closure and proper operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the ejection device is designed to unlock upon over-pressing the furniture part into the over-pressing position, then the furniture part can be opened actively, but secure closure cannot be guaranteed when the furniture part is excessively pushed shut
Solution Approach 1:
The blocking element acts as an intermediary between the over-pressing movement and the ejection device unlocking mechanism. It mediates by selectively preventing or allowing unlocking based on the closing speed, thus resolving the contradiction between enabling active opening and ensuring secure closure
2Reliability
If a blocking element is introduced to prevent movement into the over-pressing position, then secure closure is ensured, but the device complexity increases
Solution Approach 1:
The blocking element is integrated into the existing ejection device structure and serves multiple functions: it blocks improper over-pressing movements, allows legitimate over-pressing for opening, and automatically resets. This multi-functionality reduces the need for separate components, thereby minimizing the increase in device complexity
3Reliability
If the blocking element prevents unlocking immediately upon reaching the over-pressing position, then secure closure is maintained, but normal triggering of the drive device is impaired
Solution Approach 1:
The blocking element transitions from a static blocking state to a dynamic releasing state based on the closing speed. It dynamically adapts its function: blocking during normal closing to ensure secure closure, and releasing during rapid closing to allow normal triggering of the ejection device
Data Source
AI summary
A drive device for a movable furniture part has a lockable ejection device for ejecting the movable furniture part from a closed position into an open position. The ejection device can be unlocked by pressing the movable furniture part into an over-pressed position situated behind the closed position in the closing direction. A blocking element is provided which has a blocking position in which the blocking element prevents the unlocking of the ejection device upon reaching the pressed-over position, and which has a release position in which the ejection device can be unlocked upon reaching the pressed-over position.