Drawer pull-out guide
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Solution Overview
Problem
Drawer pull-out guides face challenges in precise arrangement of support elements due to component tolerances, leading to increased friction or excessive tilting, resulting in jamming or an inferior appearance when the drawer is assembled.
Innovation Solution
An adjusting device is used to adjust the height of the support element relative to the guide rail, allowing for a predetermined position to be set and locked, ensuring optimal play between the support element and the guide rail, which can be adjusted between closed and open positions to prevent tilting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the support element is fixed in a predetermined position during manufacture, then the manufacturing process is simple, but component tolerances cause increased friction or excessive tilting leading to jamming or inferior appearance
Solution Approach 1:
The support element is made adjustable in height through an adjusting device, allowing it to adapt to variations in guide rail positions and tolerances. This dynamic adjustment capability enables the support element to maintain optimal clearance under different operating conditions, preventing both jamming (when clearance is too small) and excessive tilting (when clearance is too large), while resolving the contradiction between simple manufacturing and reliable operation.
2Loss of energy
If the support element is positioned with small play relative to the guide rail, then friction is reduced, but the guide rail may tilt excessively when the drawer is in the open position
Solution Approach 1:
The height of the support element can be dynamically adjusted based on the operational requirements. The adjusting device allows optimization of the play between the support element and guide rail - sufficient play is maintained to prevent excessive friction during closed position operation, while the adjustability ensures proper alignment stability is achieved when the drawer is in the open position, preventing excessive tilting.
3Stability of the object's composition
If the support element is positioned with large play relative to the guide rail, then tilting is reduced, but friction increases and jamming may occur
Solution Approach 1:
The adjustable support element allows optimization of the play between the support element and guide rail. By adjusting the height, the system can maintain sufficient play to prevent excessive friction and jamming during closed position operation, while ensuring proper alignment stability is achieved when the drawer is in the open position, preventing excessive tilting.
4Reliability
If an adjusting device is added to allow height adjustment of the support element, then the play can be optimized to prevent jamming and tilting, but the device complexity increases
Solution Approach 1:
A relatively simple adjusting device is provided that enables height adjustment of the support element through basic mechanical means. This adjusting device allows optimization of the play between the support element and guide rail to prevent both jamming and excessive tilting, while maintaining acceptable device complexity through straightforward adjustment mechanisms.
Data Source
Figure 1
Figure 2a~2b
Figure 3a~3c
AI summary
Drawer extension guide (4), comprising: - a first guide rail (10) and at least a second guide rail (11), which are mounted to be displaceable relative to each other, - at least one support element (17) arranged on a first guide rail (10) for at least temporary support on the second guide rail (11), - wherein the position of the at least one support element (17) relative to the second guide rail (11) is adjustable by an adjusting device (16) and can be locked relative to the first guide rail (10) after adjustment, wherein the at least one support element (17) is adjustable in a height direction (H) by the adjusting device (16) in the mounting position of the drawer extension guide (4).