Drawer Guide Locking Receiver for Tolerance-Stable Latching
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Solution Overview
Problem
Existing drawer guides face issues with reliable locking of guide rails due to manufacturing tolerances, leading to inconsistent latching forces and potential misalignment of locking elements over time.
Innovation Solution
The drawer guide incorporates a locking element receiver with two receiver portions arranged on opposite sides of the relative movement path, allowing the locking element to be enclosed and received from both sides, thereby making the locking forces independent of production tolerances and enabling reliable locking across various positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single locking element and receiver configuration is used, then the device complexity is reduced, but the reliability of locking is compromised due to production tolerances and clearance variations
Solution Approach 1:
The locking element receiver is divided into multiple receiver portions (at least two) that are arranged on opposite sides of the relative movement path. This segmentation allows the locking element to be engaged from multiple directions, compensating for clearance variations and production tolerances between guide rails, thereby improving locking reliability without requiring a fundamentally more complex device architecture.
Solution Approach 2:
Different receiver portions are positioned at specific locations relative to the locking element's movement path, creating localized engagement points that accommodate variations in guide rail positioning. This local quality approach ensures that at least one receiver portion can reliably engage the locking element regardless of overall guide rail clearance, maintaining locking reliability while keeping the overall device structure relatively simple.
2Manufacturing precision
If traditional latching lugs and recesses are used, then the manufacturing precision requirements are reduced, but the latching force consistency deteriorates due to clearance variations
Solution Approach 1:
The receiver is segmented into multiple portions that can independently engage the locking element from different positions. This segmentation ensures that even if guide rails have clearance variations or production tolerances, at least one receiver portion will be properly positioned to engage the locking element with consistent latching force, thereby maintaining force consistency without requiring extremely high manufacturing precision.
Solution Approach 2:
The design changes the geometric parameters of the locking mechanism by arranging receiver portions at specific positions and orientations relative to the locking element's movement path. This parameter optimization ensures that the locking element can be reliably engaged with consistent force despite variations in guide rail clearance, effectively decoupling latching force consistency from strict manufacturing precision requirements.
3Force
If the locking element receiver is positioned for optimal engagement, then the locking force is maximized, but the adaptability to production tolerances and clearance variations is reduced
Solution Approach 1:
By segmenting the receiver into multiple portions positioned at different locations relative to the locking element's movement path, the design achieves both high locking force and tolerance adaptability. Each receiver portion can engage the locking element with optimal force when properly aligned, while the multiple portions collectively provide adaptability to production tolerances and clearance variations, as at least one portion will be correctly positioned for engagement.
Solution Approach 2:
The locking element receiver with multiple portions serves multiple functions simultaneously: it provides strong locking engagement through properly positioned receiver portions, accommodates production tolerances and clearance variations through the distributed arrangement of portions, and maintains adaptability across different operating conditions. This multi-functionality resolves the contradiction between maximizing locking force and maintaining tolerance adaptability.
Data Source
AI summary
A drawer guide is provided for a drawer configured to be pulled out of a carcass in a pull-out direction. The drawer guide has at least two guide rails displaceable relative to one another, and a locking device for locking at least one of the at least two guide rails relative to at least one further one of the at least two guide rails with respect to the pull-out direction. The locking device has at least one locking element and at least one locking element receiver to receive the at least one locking element, which are arranged on different guide rails. The at least one locking element receiver has at least two receiver portions, between which at least one locking element is receivable in a locked state of the drawer guide.