Slide rail assembly
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Solution Overview
Problem
Slide rail assemblies often experience errors in differential movement between the running carriage and the second rail, leading to inaccurate displacement and positioning issues, particularly in applications like drawers where precise movement is required.
Innovation Solution
A correction mechanism is integrated into the slide rail assembly, comprising an action member and a pushing member connected to an actuator on the second rail, which corrects errors in differential movement by displacing the running carriage when errors occur, ensuring precise proportional movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a running carriage is used to carry the second rail and facilitate differential movement, then the displacement function is achieved, but errors in differential movement occur leading to positioning inaccuracies
Solution Approach 1:
The correction mechanism functions as a feedback system that continuously monitors the position of the running carriage relative to the second rail and automatically compensates for differential movement errors. The actuator detects positioning deviations and generates corrective actions by driving the action member to adjust the running carriage position, ensuring accurate differential movement throughout the operational range.
Solution Approach 2:
The patent replaces pure mechanical differential movement with a hybrid system that combines mechanical structure with an actuator-driven correction mechanism. Instead of relying solely on mechanical precision, the system uses the actuator to actively compensate for mechanical errors, substituting passive mechanical precision with active controlled correction.
2Manufacturing precision
If a correction mechanism is added to correct differential movement errors, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The action member serves multiple functions: it acts as a lever for mechanical advantage, a positioning element for the running carriage, and a transmission component for the actuator. By making the action member multi-functional, the patent reduces the need for separate dedicated components for each function, thereby limiting the increase in device complexity while maintaining correction capability.
Solution Approach 2:
The action member acts as an intermediary between the actuator and the running carriage. Instead of the actuator directly moving the running carriage, the action member mediates this interaction, providing mechanical advantage and smooth motion transfer. This intermediary approach simplifies the overall system architecture compared to direct actuation while maintaining precision.
3Reliability
If an actuator is connected to the second rail to drive the action member, then error correction capability is improved, but the use of energy increases
Solution Approach 1:
The actuator applies partial action by only engaging to correct specific differential movement errors rather than continuously driving the system. The correction mechanism activates only when positioning deviations are detected, consuming energy selectively rather than continuously, thereby limiting energy consumption while maintaining error correction capability.
Solution Approach 2:
The correction mechanism transitions from a static mechanical system to a dynamic system where the actuator actively adjusts the action member position based on real-time differential movement conditions. This dynamic approach allows the system to consume energy only when correction is needed, rather than maintaining constant energy input, thus limiting overall energy consumption while improving reliability.
Data Source
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AI summary
A slide rail assembly (20) includes first and second rails (26, 30), a running carriage (36), a correction mechanism (34), and an actuator (40). The running carriage (36) is slidably mounted on the first rail (26), carries the second rail (30), and, when the second rail (30) is longitudinally displaced relative to the first rail (26), is differentially moved relative to the second rail (30). The correction mechanism (34) is mounted on the first rail (26) and includes an action member (44) and a pushing member (42) movably connected to the action member (44). The actuator (40) is connected to the second rail (30). Should a differential movement error of the running carriage (36) occur, the actuator (40) drives the action member (44) while the second rail (30) is being extended, thereby displacing the pushing member (42), and hence the running carriage (36), so as to correct the error.