Pull-Out Blocking Rail With Pivoting Supports for Drawer Balance
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Solution Overview
Problem
Existing pull-out blocking devices for furniture are complex in design and costly, often requiring multiple parts and additional components to prevent accidental unbalancing of furniture structures when multiple drawers are pulled out.
Innovation Solution
The design simplifies pull-out blocking devices by using inherently rigid support elements with integrated upper, lower, and further supporting surfaces, allowing for pivotability between blocking and releasing positions, and incorporating intermediate elements to reduce the number of support elements needed, particularly for larger drawers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If support elements are constructed in multiple parts with additional rollers and pivotable levers, then the blocking function is achieved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the upper supporting surface, lower supporting surface, and further supporting surface into a single monolithic support element body. This eliminates the need for separate rollers and pivotable levers, reducing the number of parts while maintaining the blocking function through the integrated rigid structure.
Solution Approach 2:
The monolithic support element body performs multiple functions simultaneously: it provides upper supporting surface, lower supporting surface, and further supporting surface all in one component. This multi-functional design replaces what previously required multiple separate components working together.
2Device complexity
If support elements are made monolithic with integrated supporting surfaces, then the device complexity is reduced, but the ability to adapt to different drawer sizes and spacings is limited
Solution Approach 1:
The support element is designed to be pivotable about a pivot axis, allowing it to dynamically change its position between blocking and releasing positions. This dynamic capability enables the same monolithic structure to adapt to different operational requirements while maintaining structural simplicity.
Solution Approach 2:
The patent introduces intermediate elements that can be arranged between support elements to adjust the spacing. This segmentation approach allows the system to adapt to different drawer sizes and spacing requirements without complicating the basic support element structure.
3Ease of manufacture
If the number of support elements is reduced for large drawers, then the cost is reduced, but the fine spacing control is compromised
Solution Approach 1:
The patent introduces intermediate elements as mediators between support elements. These intermediate elements fill the spacing gaps when support elements are spaced farther apart for large drawers, maintaining the fine spacing control and manufacturing precision while allowing fewer support elements to be used, thus reducing cost.
Data Source
AI summary
A pull-out blocking device for furniture parts that can be pushed into or pulled out of a basic furniture structure, the pull-out blocking device having a guide rail and a sequence of support elements mounted on the guide rail displaceable in the longitudinal direction, and at least one intermediate element arranged between two of the support elements. Each support element has an upper supporting surface for abutment against a support element arranged adjacently above, a lower supporting surface for abutment against a support element arranged adjacently below and a further supporting surface for abutment against the support element arranged adjacently above or below. Each support element is pivotably arranged on the guide element for movement between the blocking and releasing positions, and all the supporting surfaces are arranged outside the guide element. The intermediate element's longitudinal extent is a multiple of a longitudinal extent of one of the support elements.