Slide rail assembly
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Solution Overview
Problem
Existing slide rail assemblies lack a mechanism to inform users when the second and third rails reach specific positions relative to the first rail, failing to meet market requirements for precise positioning and damping during movement.
Innovation Solution
A slide rail assembly with a damping device, featuring a first rail, a second rail, and a third rail, where the third rail has first and second pushing features to engage the damping device, along with a contact member, synchronization member, blocking structure, and locking member, allowing for synchronized movement and damping effects during opening and retraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a damping device is added to the slide rail assembly, then damping effect is improved, but device complexity increases
Solution Approach 1:
The damping device is nested within the third rail structure, with the damping body integrated into the rail's internal cavity. The first and second pushing features are formed as part of the rail's geometry, eliminating the need for separate damping housings and reducing overall structural complexity while maintaining damping functionality.
Solution Approach 2:
The damping device is merged with the third rail to form an integrated assembly. The pushing features that activate the damping mechanism are formed directly on the rail surfaces, combining the rail's structural function with the damping activation function, thereby reducing the number of discrete components.
2Measurement precision
If synchronized movement mechanism is added, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The synchronization member acts as an intermediary mechanism between the second and third rails. It includes a synchronization arm that contacts both rails and a cam surface that converts linear motion into synchronized movement, enabling precise positioning without requiring complex direct coupling mechanisms.
Solution Approach 2:
The cam surface on the synchronization member creates periodic contact points with the second and third rails, ensuring synchronized movement at specific intervals. This periodic engagement provides precise positioning at predetermined positions while maintaining simplicity through repeated geometric patterns.
3Reliability
If locking mechanism is added, then reliability is improved, but ease of operation worsens
Solution Approach 1:
The locking member is designed to automatically engage with the blocking structure when the third rail reaches its predetermined position. The spring-loaded design causes the locking member to self-actuate upon contact with the blocking structure, providing reliable locking without requiring manual intervention or additional control mechanisms.
Solution Approach 2:
The locking member is pre-positioned by the spring force to be ready for engagement. When the rail approaches the locked position, the blocking structure preemptively contacts the locking member, triggering the locking action before the rail can overshoot or become unstable, ensuring reliable positioning.
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 precise positioning and damping effects, allowing users to be aware of the third rail's fully extended or retracted state, ensuring correct sequence and preventing unintended movement, thus addressing the limitations of prior art.
Implementation Method 1
a resiliently deformable damping member is located in a respective chamber provided at each longitudinal end of the first and second slidable housings
Implementation Method 2
The damping member has a buffer portion that projects out of and beyond its chamber for engaging with a stop at the travel limit of the slidable housing, the chamber being oversized relative to the portion of the damping member disposed within the chamber whereby the chamber accommodates expansion of the damping member when it is deformed by impact with the stop
Data Source
Figure 1
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Figure 3
AI summary
A slide rail assembly (20) includes a rail (22), a moving rail (26), and a damping device (40). When the moving rail (26) is moved relative to the rail, the damping device (40) is pushed by the moving rail (26) to provide damping effect.