Ejection device for a movable furniture part
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ejection devices for furniture parts lack precise and reliable coupling and decoupling mechanisms, often resulting in unpredictable decoupling positions due to force-dependent interactions, which can lead to premature decoupling during jerky movements.
Innovation Solution
A control device is implemented to manage the coupling and decoupling of the ejection device along a predetermined opening path, ensuring a travel-controlled coupling and decoupling process, with a positive-locking engagement in the coupling position that can be released by the control device, preventing premature decoupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If force-fitted (magnetic) coupling is used, then coupling is achieved without positive-locking, but decoupling position cannot be exactly determined and may occur too early
Solution Approach 1:
A control element acts as an intermediary between the force-fitted coupling components. This control element mechanically links the coupling piece and coupling counter-piece, ensuring that decoupling only occurs when the control element itself decouples at the predetermined position, thereby achieving both ease of operation and precise decoupling position control
Solution Approach 2:
The system transitions from pure force-fitted coupling to a hybrid mechanism where the control element introduces a geometric constraint parameter. The decoupling position is determined by the predetermined geometric relationship between the control element and the opening path, rather than solely by magnetic force parameters
2Reliability
If positive-locking engagement is used, then reliable coupling is achieved, but wear of adjacently arranged parts occurs due to frequent coupling and decoupling movements
Solution Approach 1:
The patent replaces traditional mechanical positive-locking with a controlled force-fitted coupling system. The control element provides the necessary constraint without requiring direct mechanical interlocking between the main coupling components, thereby reducing wear while maintaining reliability
Solution Approach 2:
The control element serves as a mediator that enables reliable coupling control without the wear-inducing direct positive-locking engagement. It transfers the control function away from the load-bearing coupling surfaces, extending their service life
3Adaptability or versatility
If detachable latching via flexible or elastic components is used, then coupling is achieved, but decoupling position cannot be exactly guaranteed due to component wear
Solution Approach 1:
The control element acts as a rigid intermediary that defines the decoupling position through predetermined geometric relationships, overriding the position uncertainty introduced by flexible or elastic latching components. The control element's fixed geometry ensures precise decoupling positioning
Data Source
AI summary
The invention relates to an ejection device for ejecting a movable furniture part from a closed position into an open position along an opening path, comprising a support and a coupling device for coupling the ejection device to the movable furniture part. The coupling device has a coupling piece which can be moved relative to the support and a coupling counter piece which is arranged on the movable furniture part or on a furniture body. The coupling device has a coupling position and a decoupling position, and the ejection device can be coupled to the movable furniture part via the coupling device in the coupling position. The ejection device also comprises a controller, by means of which the coupling device can be switched depending on the opening path, and the coupling device reaches the decoupling position from the coupling position in the event of a specified opening path.