Pull-Out Guide Bolt Locking for Simplified Furniture Rail Blocking
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Solution Overview
Problem
Existing pull-out guides for furniture parts are complex in design and installation, particularly when it comes to locking mechanisms for preventing inadvertent extension or retraction, especially in movable furniture items like toolboxes or vehicle-mounted furniture.
Innovation Solution
A pull-out guide with a bolt part that is adjustable by a spring element and actuating element, allowing it to slide or roll along a running track on the cabinet rail, enabling automatic blocking and release without the need for additional latching mechanisms, and allowing flexible actuation via traction cables or actuating rods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a blocking lever with pivotable handle is used to lock the pull-out furniture part, then the locking function is achieved, but the design and installation become relatively complicated
Solution Approach 1:
The blocking device is divided into separate functional components: a bolt part for blocking, a spring element for automatic positioning, and a separate actuating element. This segmentation allows each component to be optimized independently and simplifies the overall design and installation process compared to an integrated pivotable blocking lever system
Solution Approach 2:
The spring element automatically positions the bolt part into the blocking position without requiring manual intervention or complex actuation mechanisms. The system self-regulates the blocking state based on the pull-out rail position, eliminating the need for complex pivotable handles and manual positioning mechanisms
2Adaptability or versatility
If a pivotable blocking lever is used, then locking in both positions is possible, but additional components and installation steps are required
Solution Approach 1:
The bolt part serves multiple functions: it blocks the pull-out rail in the pushed-in position, blocks it in the pulled-out position, and guides itself along the running track during movement. This multi-functionality eliminates the need for separate stop parts and reduces the number of components required for manufacturing and installation
Solution Approach 2:
The blocking function and the guiding function are merged into a single bolt part that performs both roles. The bolt part combines the blocking lever functionality with the running track guidance, reducing the total component count and simplifying both manufacturing and installation processes
3Extent of automation
If the bolt part is held by a spring element in the blocking position, then automatic blocking is achieved, but force is required to actuate against the spring force
Solution Approach 1:
The actuating element serves as an intermediary that translates user input into bolt part movement. It provides mechanical advantage and control, allowing the user to overcome the spring force with minimal effort while maintaining automatic blocking functionality through the spring element
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
This design provides a simple, stable, and space-saving solution for locking pull-out furniture parts in both pushed-in and pulled-out positions, eliminating the need for separate stop parts and allowing for easy actuation without opposing forces, thus enhancing usability and installation simplicity.
Implementation Method 1
the bolt part is pressed onto the running track by the spring element
Implementation Method 2
the bolt part slides or rolls along a running track of the cabinet rail
Data Source
AI summary
A pull-out guide for a furniture part (2) which can be pulled out of a furniture cabinet (1) includes a cabinet rail (3) which is attachable to the furniture cabinet (1), a pull-out rail (5) which is attachable to the pull-out furniture part (2), and a bolt part (10) for blocking the pulling out of the pull-out rail from an insertion position of the pull-out rail (5), and/or for blocking the pushing in of the pull-out rail (5) from an extension position of the pull-out rail (5). The bolt part (10) is displaceable by an actuating element (13, 13′) from a blocking position, in which the bolt part (10) is acted upon by a spring element (12), in a displacement direction (11) into a release position, wherein, during the pulling out and pushing in of the pull-out rail (5), the bolt part (10) slides or rolls along a running track (23) of the cabinet rail (3) and is pressed onto the running track (23) by the spring element (12).