Drawer Pull-Out Rail Adjustment With Nested Retaining Pin
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Solution Overview
Problem
Existing drawer pull-out guides require complex and space-consuming adjustment mechanisms to allow for adjustable positioning of drawers without tools, particularly in furniture made of wood-based materials, which limits their ease of assembly and adjustment.
Innovation Solution
A compact adjustment device featuring a retaining pin inserted into a pre-drilled hole in the drawer, with a bearing part on the pull-out rail that is adjustably mounted within the pin, allowing horizontal or vertical movement, and a frictionally locking mechanism for secure positioning, eliminating the need for additional mounting plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a complex adjustment mechanism with additional mounting plates is used to allow tool-free assembly and adjustment of drawers, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The bearing part is integrated within the retaining pin structure, with the bearing part mounted on the pull-out rail being adjustably mounted within the retaining pin. This nesting eliminates the need for separate mounting plates and complex external adjustment mechanisms, reducing overall device complexity while maintaining adjustability
Solution Approach 2:
The adjustment function is merged into the retaining pin-bearer part connection. The bearing part can be adjusted within the retaining pin to achieve both lateral and height adjustment of the drawer rear end, combining multiple adjustment functions into a single integrated component rather than requiring separate mechanisms
2Adaptability or versatility
If additional mounting plates and complex mechanisms are added to enable adjustment, then the adaptability is improved, but the volume of the assembly increases
Solution Approach 1:
The compact nested structure of the bearing part within the retaining pin minimizes the space required for the adjustment device, eliminating the need for additional mounting plates that would increase the volume of the assembly
Solution Approach 2:
The retaining pin-bearer part connection serves multiple functions: it provides structural support, enables lateral adjustment, enables height adjustment, and allows tool-free operation. This multi-functionality eliminates the need for separate dedicated components for each adjustment function, reducing overall assembly volume
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, tool-free assembly and adjustment of drawers, allowing for precise alignment and gap adjustment between drawer front panels and adjacent drawers, while maintaining a structurally simple and space-efficient design.
Implementation Method 1
a frictionally locking mechanism for secure positioning
Data Source
Figure 1
Figure 2
Figure 3a~3d
AI summary
The invention relates to a pull-out guide (3) for drawers (2), comprising a body rail (5) to be fastened to a furniture body (4) and at least one pull-out rail (6) that can be moved relative to the body rail (5), and comprising an adjustment device (8), by which a position of a drawer (2) that is connected or can be connected to the pull-out rail (6) can be adjusted, wherein the adjustment device (8) comprises at least one retaining pin (10) that can be inserted in a provided borehole (21) of the drawer (2) and a bearing part (9) mounted on the pull-out rail (6), wherein the bearing part (9) is arranged at the rear end of the pull-out rail (6) and extends at a distance to an upper side (6a) of the pull-out rail (6) in a substantially horizontal direction in the longitudinal direction of the pull-out rail (6), wherein the bearing part (9) is mounted adjustably inside the retaining pin (10).