Friction-Locked Clamping Mechanism for Drawer Pullout Guide Fixation
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Solution Overview
Problem
Existing devices for fixing movable furniture parts, such as drawers, on pullout guides face limitations in providing high holding forces, especially with heavy drawers, and often result in reduced position accuracy and low holding forces during impact tests.
Innovation Solution
A device with a clamping mechanism featuring a self-locking clamping lever that secures a web-shaped holding part in a friction-locked manner, allowing for stable fixation and accurate positioning, utilizing a friction-locked connection rather than form-fitting stop elements, and can be pre-tensioned with springs for enhanced holding force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a catch element and base part are used as plastic parts for fixing a drawer on a pullout guide, then the device is simple to manufacture, but the holding forces are limited especially in the case of heavy drawers
Solution Approach 1:
The patent changes the material parameter from plastic to metal for the clamping lever and holding part, fundamentally increasing the holding force capability. This material parameter change enables the device to withstand heavy drawer weights and high impact forces during standardized impact tests, directly resolving the holding force limitation of plastic-based solutions.
Solution Approach 2:
The clamping lever is designed with a curved contact surface that friction-locks against the holding part. This curved geometry creates effective friction contact over an area rather than at a single point, significantly increasing the holding force while maintaining a simple mechanical structure that is easy to manufacture.
2Adaptability or versatility
If an elastic material piece is used to connect holding part and counter holding part, then the device allows for flexibility, but the position accuracy in the longitudinal direction is reduced
Solution Approach 1:
The patent removes the elastic material piece from the connection between holding part and counter holding part. By extracting this flexibility-providing element, the design achieves precise longitudinal positioning through the rigid metal construction and friction-locked clamping mechanism, while still allowing for tolerance compensation through the adjustable clamping force.
3Stability of the object's composition
If form-fitting stop elements such as teeth or stops are used for fixing, then the connection is rigid, but continuous adjustment is not possible
Solution Approach 1:
The patent employs a dynamic friction-locked connection where the clamping lever can be adjusted along the holding part's length. The friction lock provides rigid stabilization at any positioned point while allowing continuous adjustment to different positions, combining the benefits of rigidity and adaptability that form-fitting stops cannot achieve.
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
The solution provides high holding forces and accurate positioning of furniture parts, ensuring they do not unintentionally slip during pullout, while allowing for easy installation and continuous adjustment without relying on stop elements, thus addressing the limitations of existing technologies.
Implementation Method 1
a self-locking clamping lever is provided on the receptacle, by means of which the holding part is secured in a friction-locked manner against being pulled out
Implementation Method 2
The clamping lever can be pre-tensioned in a locked position via a force accumulator, in particular via one or more springs
Data Source
AI summary
A device for fixing a push element, in particular a drawer box to a rail of a pull-out guide, the device comprising a clamping mechanism with a receptacle, into which a web-shaped holding part can be inserted, wherein a self-locking clamping element is provided at the receptacle, by means of which the holding part is secured in a clamping manner against being pulled out. As a result, a particularly stable fixation of the drawer box to a pull-out guide can be achieved.