Three-Section Slide Assembly With Pin Release Retention
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Solution Overview
Problem
Existing slide assemblies with complex retention and releasing mechanisms are costly and have not gained wide acceptance due to their expensive construction.
Innovation Solution
A three-section slide assembly with a simple retention and releasing mechanism, featuring a first slide with a stop and block, a second slide with a stop piece and slot for a retention pin, and a third slide with a releasing member that lifts the retention pin to allow retraction when the assembly is in a semi-extended state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex retention and releasing mechanisms are used, then the slide assembly can achieve reliable retention, but the manufacturing cost increases
Solution Approach 1:
The retention mechanism is segmented into distinct functional components: stops positioned at specific locations, a retention pin with head and body portions, and a releasing member with lever arm. This segmentation allows each component to perform its specific function independently, achieving reliable retention while keeping individual parts simple and cost-effective to manufacture.
Solution Approach 2:
The releasing member is extracted as a separate, simple component that can be easily manufactured and assembled. By taking out the releasing function as a distinct element rather than integrating it into a complex mechanism, the overall system becomes simpler and more cost-effective while maintaining reliable retention and releasing capabilities.
2Ease of manufacture
If simple retention and releasing mechanisms are used, then the manufacturing cost is reduced, but the reliability of retention may be compromised
Solution Approach 1:
The retention pin is designed with different local qualities: a head portion that engages with the releasing member and a body portion that engages with the stop. This local differentiation allows the simple pin structure to achieve reliable retention through properly positioned engagement points, maintaining reliability while keeping manufacturing costs low.
Solution Approach 2:
The retention pin acts as an intermediary element between the stop and the releasing member. This simple intermediary component transfers the retention function from the stationary stop to the movable releasing member, enabling reliable retention control through a simple, cost-effective mechanism.
3Reliability
If multiple engaging members and tracks are used, then the slide assembly can achieve reliable retention, but the device complexity increases
Solution Approach 1:
The retaining function is merged into the stationary slide structure through integrated stops, eliminating the need for separate retaining components. The releasing member combines the functions of actuation and disengagement in a single simple component, reducing overall mechanism complexity while maintaining reliable retention.
Solution Approach 2:
The releasing member serves multiple functions: it acts as a lever for actuation, engages with the retention pin head, and controls the disengagement of the retention pin from the stop. This multi-functionality in a single simple component reduces the number of parts needed, thereby reducing device complexity while maintaining reliable retention and releasing capabilities.
Data Source
AI summary
A slide assembly includes a first slide (10), a second slide (20) slidably attached to the first slide, and a third slide (30) incorporated with a releasing member (50) slidably attached to the second slide. The first slide includes a stop (14) and a block (16). The second slide has a stop piece (28) and a slot (26) for movably receiving a retention pin (40). When the first, second, and third slides are in a fully extended state, the retention pin and the stop piece are resisted by the stop and the block of the first slide respectively, thereby restraining sliding movement between the second slide and the first slide; when the third slide is retracted from the fully extended state to a semi-extended state, the retention pin is lifted by the releasing member and disengaged from the stop, thereby allowing the second slide to retract into the first slide.