Furniture Drive Coupling for Push-Open and Pull-Open Motion
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Solution Overview
Problem
Existing drive devices for furniture parts fail to maintain a coupling position upon opening by pulling, requiring unlocking upon reclosing and losing connection to the furniture carcass, which complicates the operation and efficiency of furniture movement.
Innovation Solution
A drive device with a coupling device that remains in a coupling position upon ejection and is movable independently of the ejection device upon opening by pulling, allowing it to maintain the coupling position without spring loading and re-establishing the connection upon closing without additional unlocking steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coupling device is fixed to the ejection device, then the coupling position is maintained upon ejection, but the coupling device cannot move independently upon opening by pulling, causing the furniture part to lose connection to the carcass
Solution Approach 1:
The coupling device is divided into separate components: a coupling element attached to the furniture part and a corresponding coupling component on the carcass. These segments can move independently relative to each other, allowing the coupling to maintain connection during both ejection and pulling operations without requiring a fixed rigid connection.
2Ease of operation
If the ejection device is unlocked upon opening by pulling, then the furniture part can move freely, but additional unlocking steps are required upon reclosing, complicating the operation
Solution Approach 1:
The coupling device is designed to automatically maintain the coupling position during the entire opening and reclosing cycle without requiring intermediate unlocking actions. The preliminary configuration of the coupling elements ensures that no additional unlocking steps are needed upon reclosing, as the coupling remains engaged throughout the motion cycle.
3Force
If the coupling device is spring-loaded, then it can maintain constant contact force, but it cannot move loosely independently upon opening by pulling
Solution Approach 1:
The spring loading mechanism is extracted or removed from the coupling device. Instead of using spring force to maintain contact, the coupling relies on geometric constraints and the natural movement paths of the furniture part and carcass, allowing the coupling elements to move loosely and independently during opening by pulling while maintaining connection through their interlocking geometry.
Data Source
AI summary
A drive device for a movable furniture part includes an ejection device which can be locked in a locked position, the ejection device being used to move the movable furniture part from a closed position into an open position. The ejection device can be unlocked by pushing the movable furniture part so that the movable furniture part moves into a pushed-in position which is beyond the closed position in a closing direction, this enables the ejection device to move the movable furniture part in an opening direction; and the movable furniture part can also be moved from the closed position into the open position by pulling the movable furniture part, the ejection device remaining in the locked position when opened by pulling. The drive device also includes a coupling device for coupling the drive device to the movable furniture part or to a furniture body.