Blow-Molded Pool Ladder Locking Mechanism
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Solution Overview
Problem
Existing blow-molded ladders lack a secure locking mechanism, relying on friction fits which are inadequate for stability, especially in applications like ladders that require a more secure assembly.
Innovation Solution
The design incorporates a double aperture configuration on each step and support, with a male step protrusion and hour-glass protrusions that securely engage with corresponding receiving and securing areas, providing a stable and secure assembly without the need for additional interconnection devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If friction fit connection is used in blow-molded ladders, then the structure is simple and easy to manufacture, but the stability and security of the assembly is insufficient
Solution Approach 1:
The connection system is divided into separate male and female interlocking components that can be independently molded into the ladder structure. The male component with protrusions and the female component with recesses are segmented design elements that work together to provide secure connection while maintaining blow-molded manufacturing simplicity.
Solution Approach 2:
The male and female interlocking components are nested within each other, with the male component fitting into the female component's recesses. This nesting arrangement creates a secure locked position while allowing both components to be integrated into the blow-molded structure without requiring separate assembly steps.
2Reliability
If additional interconnection devices like rods or screws are added, then the stability and security improve, but the device complexity increases
Solution Approach 1:
The male and female interlocking components are merged directly into the blow-molded ladder structure itself, eliminating the need for separate interconnection devices. The ladder's structural elements serve dual purposes: providing support and enabling secure connection through the integrated interlocking mechanism.
Solution Approach 2:
The ladder structure itself provides the connection mechanism through its own molded features. The male and female components are self-contained elements of the ladder that enable secure assembly without requiring external fasteners or interconnection devices, making the structure self-sufficient.
3Reliability
If immediate locking system is used, then the assembly is secure, but the ease of assembly deteriorates
Solution Approach 1:
The interlocking components are designed with flexible, deformable features that allow dynamic engagement during assembly. The male and female components can flex and deform to accommodate slight misalignments and facilitate easy insertion, then lock securely once properly positioned, combining ease of assembly with secure connection.
Data Source
AI summary
A three-step pool ladder having the capability to have a fourth step and/or a curve-about ladder apparatus.