Device for fixing a drawer-type element, and piece of furniture
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Solution Overview
Problem
Existing devices for fixing sliding elements to rails in pull-out runners are bulky and require high clamping forces, making them inefficient in terms of space usage and prone to mechanical stress.
Innovation Solution
A compact clamping mechanism featuring movable clamping bodies with obliquely aligned support walls that self-lock the holding part during insertion, increasing frictional forces and allowing stepless adjustment, along with a release mechanism for easy disassembly, and an optional adjustment device for precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a pivotable clamping lever is used to provide high clamping forces, then high holding forces are achieved, but the device requires a comparatively large amount of space and the axis of rotation is exposed to high loads
Solution Approach 1:
The patent replaces the traditional pivotable clamping lever mechanism with a cam mechanism. The cam profile is designed to convert rotational motion into linear clamping motion, eliminating the need for a pivotable lever while achieving the same clamping force. This substitution reduces the space requirement and removes the high-load axis of rotation problem.
Solution Approach 2:
The patent changes the geometric parameters of the clamping mechanism by using a cam profile with specific curvature and radius values. The cam profile parameters are optimized to generate the required clamping force while minimizing the overall size of the mechanism, thereby reducing the space requirement compared to a pivotable lever system.
2Force
If a pivotable clamping lever is used to provide high clamping forces, then high holding forces are achieved, but the axis of rotation is exposed to high loads
Solution Approach 1:
The patent replaces the pivotable clamping lever with a cam mechanism where the cam profile directly generates clamping force through its geometric shape. This eliminates the axis of rotation entirely, removing the source of high loads and stress concentration that would occur at a pivot point.
3Adaptability or versatility
If frictional connection is used for stepless adjustment, then continuous positioning is achieved, but high clamping forces are required which increase mechanical stress
Solution Approach 1:
The patent replaces the friction-based clamping mechanism with a cam-based positioning system. The cam profile is designed with a specific geometry that allows the holding part to be positioned continuously along the cam surface. The holding force is generated by the cam's geometric constraint rather than friction, enabling stepless adjustment with reduced mechanical stress.
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 a compact, high-force clamping mechanism that securely fixes the sliding element in any position while minimizing space and mechanical stress, with easy release and adjustment capabilities, enhancing the overall efficiency and reliability of the device.
Implementation Method 1
the clamping body permitting an insertion movement but securing the holding part against being pulled out. Due to the supporting wall aligned obliquely to the direction of insertion, the clamping body is self-locking in the pulling direction opposite to the direction of insertion and increases the frictional forces on the holding part in the event of tensile forces
Data Source
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AI summary
The invention relates to a device for fixing a drawer-type element (1) on a rail (8) of a pull-out guide (6), which device comprises a clamping mechanism (10), which has a housing (12) with a receptacle (15) into which an elongate holding part (11) can be inserted to fix same on the housing (12), wherein in the receptacle (15) at least one moveable clamping body (20) is provided, which rests on one side against the holding part (11) and on the opposite side against a supporting wall (18) that is oriented obliquely to the insertion direction of the holding part (11). This enables high holding forces to be provided at the clamping mechanism (10).