Pivot and pull-out fitting for a corner cabinet
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Solution Overview
Problem
Existing pivot and pull-out fittings for corner cabinets do not allow for easy height adjustment of upper shelves, limiting the flexibility and efficiency of space utilization.
Innovation Solution
The carrier is mounted pivotably on a bracket that is guided in a rotationally fixed and axially displaceable manner on an axle tube, secured by a clamping lever that engages the axle tube for self-locking, allowing height adjustment and enhanced clamping force through the weight of the shelf and its contents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the carrier is rigidly fixed at a specific height in the corner cabinet, then the structural stability and positioning accuracy are improved, but the adaptability and flexibility for different shelf heights are worsened
Solution Approach 1:
The bracket is designed to be dynamically adjustable in height along the axle tube, transitioning from a fixed to a movable state during adjustment, and then self-locking to maintain the new position. This allows the system to adapt to different height requirements while maintaining stable operation at each position.
Solution Approach 2:
The clamping lever mechanism automatically locks the bracket at the adjusted height position through self-locking action. The system serves itself by using the weight of the shelf and its contents to increase clamping force, eliminating the need for external locking mechanisms or complex control systems.
2Adaptability or versatility
If a complex height adjustment mechanism is introduced to allow easy height adjustment of shelves, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The system uses the weight of the shelf and its contents to automatically increase the clamping force of the clamping lever. This self-service mechanism eliminates the need for motors, sensors, or complex control systems, achieving height adjustment and locking with a simple manual lever operation.
Solution Approach 2:
The height adjustment function is extracted from the overall fitting system and implemented as a separate, independent bracket mechanism on the axle tube. This modular approach simplifies the main pivot and pull-out mechanism while providing flexible height adjustment through the dedicated bracket assembly.
3Reliability
If the clamping force is increased to securely hold the shelf in position, then the reliability is improved, but the ease of operation for height adjustment is worsened
Solution Approach 1:
The clamping lever mechanism dynamically adjusts the clamping force based on the load. When the shelf is installed, its weight automatically increases the clamping force to secure the position. During adjustment, the lever can be easily moved to override this force, and upon release, the system self-locks with appropriate force.
Solution Approach 2:
The system uses the weight of the shelf as a beneficial force to increase clamping reliability. The clamping lever mechanism automatically adjusts the clamping force according to the load, eliminating the need for separate force adjustment mechanisms while maintaining both ease of operation and secure locking.
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
Enables easy and secure height adjustment of shelves, maximizing usable space without collision with cabinet walls, and ensuring the shelf remains locked in position during use.
Implementation Method 1
The clamping lever is supported at the bottom side of the bracket so as to be pivotable about a horizontal axis
Implementation Method 2
The clamping lever may be elastically biased into the clamping position by means of a spring
Implementation Method 3
Due to the weight of the carrier, the shelf, and the objects deposited thereon, the clamping lever is subject to a torque that has the tendency to tilt the clamping leaver further in the direction towards its clamping position
Data Source
AI summary
A pivot and pull-out fitting for a shelf (20) in a corner cabinet (10), includes a carrier (24) held rotatably about a vertical axis (26) in the corner cabinet; a pivot bearing for pivotably mounting the shelf on the carrier; and a pull-out guide, on which the shelf can be displaced relative to the carrier, wherein carrier (24) is mounted pivotably on a bracket (28) that is guided in a rotationally fixed and axially displaceable manner on an axial tube (29) rigidly installed in the corner cabinet and can be secured in a self-locking manner on the axial tube by a clamping lever (56).