Slide Rail Latch Mechanism for Over-Retraction Prevention
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Solution Overview
Problem
Conventional slide rail assemblies lack a mechanism to prevent accidental retraction of the inner slide rail into the outer slide rail, making it inconvenient for users to operate safely.
Innovation Solution
A two-way latch mechanism is introduced, comprising a latch member with driven portions and a cutout on the second slide rail, a stop member on the first slide rail, and a release member, along with a resilient member to ensure secure engagement and easy release, allowing controlled movement of the slide rails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stop member with a protrusion engages with the inclined wall of the retaining member to prevent over-extension, then the slide rail assembly prevents accidental release, but it cannot prevent over-retraction by careless force of users
Solution Approach 1:
The retaining member is divided into two separate retaining members, each with its own inclined wall. The latch member has corresponding cutouts with stop surfaces that engage with these inclined walls. This segmentation allows independent control of extension and retraction limits, solving the contradiction by providing dedicated mechanisms for preventing both accidental release and over-retraction.
Solution Approach 2:
The latch member is designed to be movable along the second slide rail, transitioning between engaged and disengaged states. The resilient member provides dynamic restoring force to return the latch member to its original position after actuation. This dynamic design allows the system to respond to user input while maintaining protective functions, resolving the contradiction between reliability and ease of operation.
2Adaptability or versatility
If the latch member is designed with cutout and driven portions for engagement, then the mechanism provides two-way latching, but the structure becomes more complex
Solution Approach 1:
The latch member serves multiple functions: it engages with the stop member to prevent over-extension, engages with the second retaining member to prevent over-retraction, and provides a movable interface for the release member. The resilient member also serves dual purposes by providing both restoring force and positioning. This multi-functionality reduces the need for separate components, achieving two-way latching without excessive complexity.
Solution Approach 2:
The latch member with its cutout and driven portions is integrated directly onto the second slide rail, eliminating the need for separate mounting structures. The release member slides within the second slide rail and acts directly on the latch member. This nested integration reduces overall structural complexity while maintaining full two-way latching capability.
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
The latch mechanism effectively prevents both over-extension and over-retraction of the slide rails, enhancing user safety and convenience by ensuring controlled sliding movements.
Implementation Method 1
A resilient member is placed between the latch member and the second slide rail for returning the latch member to an original position
Data Source
AI summary
A latch mechanism is provided for retaining a slide rail assembly, which includes first and second slide rails. The latch mechanism includes a latch member movably attached to the second slide rail, a stop member mounted to the first slide rail to engage in the latch member for retaining the second slide rail relative to the first slide rail, and a release member slidably attached to the second slide rail. The latch member includes first and second driven portion at one side thereof, and a cutout. The cutout has a first and second stop surfaces at opposite ends thereof. The release member is capable of pushing the first or second driven portion to release the first or second stop surface from the stop member. A resilient member is placed between the latch member and the second slide rail for returning the latch member to an original position.