Slide Rail Assembly With Intermediate Position Retention
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Solution Overview
Problem
Existing slide rail assemblies cannot retain a slide rail at positions other than the completely extended position, limiting flexibility and maintenance access in compact spaces.
Innovation Solution
A slide rail assembly with a first rail featuring a blocking feature and an engaging member, allowing the second rail to be displaced to multiple extended positions and retained at a predetermined position using an operation member that interacts with the blocking feature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the slide rail assembly is configured to allow complete extension, then the second rail can reach the second extended position, but the second rail cannot be retained at intermediate extended positions
Solution Approach 1:
The engaging member is designed to automatically engage with the blocking feature when the second rail is at the predetermined extended position, eliminating the need for separate locking mechanisms or manual intervention to maintain the position. The system self-regulates through the interaction between the engaging member and blocking feature.
Solution Approach 2:
The engaging member acts as an intermediary element between the second rail and the blocking feature on the first rail. It mediates the interaction by selectively engaging with the blocking feature to retain the second rail at the predetermined position or disengaging to allow movement to the second extended position.
2Length of moving object
If the slide rail assembly allows full extension to the second extended position, then maximum reach is achieved, but maintenance access and object removal become difficult in compact spaces
Solution Approach 1:
The slide rail assembly is designed with dynamic positioning capability, allowing the second rail to be retained at different extended positions (predetermined position or second extended position) based on operational needs. This dynamic control enables the system to provide maximum reach when needed while maintaining compact configurations for maintenance access.
Solution Approach 2:
The extension range of the second rail is segmented into distinct positions (predetermined extended position and second extended position), allowing selective engagement at intermediate positions. This segmentation enables the system to achieve partial extension for maintenance access while preserving the capability for full extension when required.
3Reliability
If the engaging member is designed to automatically engage with the blocking feature, then retention at the first extended position is achieved, but the mechanism complexity increases
Solution Approach 1:
The engaging member automatically engages with the blocking feature through the natural movement and positioning of the second rail, eliminating the need for separate actuators, sensors, or control systems. The engagement is self-actuated by the positional relationship between components.
Solution Approach 2:
The complex control and locking mechanisms are extracted from the system, replaced by a simple engaging member that passively engages with the blocking feature based on positional geometry. This extraction simplifies the overall mechanism while maintaining reliable retention.
Data Source
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AI summary
A slide rail assembly (12) includes a first rail (18), a second rail (20), an engaging member (46), and an operation member (48). The first rail (18) includes a blocking feature (34). The second rail (20) is movably connected to the first rail (18) and can be longitudinally displaced from a retracted position to a first extended position (P1) and a second extended position (P2) relative to the first rail (18). The engaging member (46) is attached to the second rail (20). The operation member (48) is mounted to at least one of the first rail (18) and the second rail (20). The operation member (48) is used to operate the engaging member (46) so that the engaging member (46) is blocked by the blocking feature (34) of the first rail (18) and thus keeps the second rail (20) at the first extended position (P1).