Sliding-Pivoting Rack Mechanism with Load-Relieved Unlocking
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Solution Overview
Problem
Existing sliding-pivoting mechanisms for furniture or domestic appliance racks require significant effort to unlock the rack from the upper loading and unloading position, as the locking pin must bear the weight of the rack during the unlocking process.
Innovation Solution
A sliding-pivoting mechanism with a locking mechanism featuring a movable locking pin and an unlocking device with a tiltable handle and wedge-shaped unlocking element, along with a support device that relieves the load on the locking pin, allowing easy release from the upper loading and unloading position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the locking pin is used to secure the rack in the upper loading and unloading position, then the rack is reliably locked, but the locking pin must bear the weight of the rack during unlocking, making it difficult to operate
Solution Approach 1:
A support device with support element and guide element is introduced as an intermediary between the rack and the locking mechanism. During unlocking, the support element supports the rack weight on the guide element, mediating the load transfer away from the locking pin, allowing the locking pin to be moved without bearing the full rack weight
2Reliability
If the locking mechanism prevents simultaneous pivoting and sliding movement, then the mechanism operates reliably, but the structure becomes more complex
Solution Approach 1:
The locking mechanism combines the locking pin, locking groove, and support device into an integrated assembly. The support device is coupled to the locking mechanism such that the support element and guide element work together with the locking pin to provide both locking function and weight support, reducing overall system 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
Facilitates easy unlocking of the rack by distributing the load and simplifying the movement of the locking pin, reducing the effort required to release the rack from its secured position.
Implementation Method 1
the unlocking element is designed as a wedge arranged on the transmission lever, with which the locking pin can be pressed out of a locking groove of the locking plate along an inclined edge of the wedge
Implementation Method 2
The wedge-shaped design of the unlocking element allows a simple linear, in particular horizontal, movement of the transmission lever to which the wedge is coupled and thus a simple conversion of the movement of the transmission lever into a lifting of the locking pin required perpendicularly thereto
Implementation Method 3
The support device of the sliding-pivoting mechanism relieves the load on the locking pin in such a way that the locking pin can be lifted into its unlocked position during the unlocking process without having to bear the load of the rack at the same time
Implementation Method 4
the actuating element is designed as a handle that can be tilted about a horizontal pivot axis and is coupled to the unlocking element via a transmission lever
Data Source
AI summary
A sliding-pivoting mechanism for a rack includes two pivot arms pivotably secured to the carcass, arranged parallel to one another, and forming a parallel guide for a pull-out guide having a guide rail and a running rail to which the rack is fastened. A locking mechanism is arranged on the guide rail and on one of the pivot arms to prevent a simultaneous pivoting and sliding movement. The locking mechanism has a locking pin arranged movably on one of the pivot arms and a locking plate mounted in a positionally fixed manner with respect to the guide rail and which interacts with the locking pin to block a pivoting movement of the pivot arms if the rack is lifted into an upper loading and unloading position. An unlocking device, coupled to the locking mechanism, has an actuating element and an unlocking element to move the locking pin from a blocking position into a release position.