Ladder Tool Platform Lifting Positioning Structure
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Solution Overview
Problem
Existing ladder designs with stretchable backrests cannot adjust their length or height, limiting their versatility and stability when used.
Innovation Solution
A lifting positioning structure for a ladder tool platform featuring front and rear supporting legs, connectors, plug pins, and elastic parts, allowing the tool platform to be adjusted in height by relative movement of the small and big tubes, with the plug pins and springs enabling stable positioning and release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the ladder uses a fixed structure, then the manufacturing and assembly are simple, but the height cannot be adjusted as needed
Solution Approach 1:
The ladder leg is divided into a big tube and a small tube that can relatively move, allowing the ladder height to be adjusted by extending or retracting the small tube within the big tube. This segmentation enables height adaptability while maintaining a relatively simple overall structure.
Solution Approach 2:
The connector is designed with movable plug pins that can shift position along the small tube. The elastic part provides dynamic restoring force to maintain the plug pin in positioning holes, enabling the structure to transition between fixed and adjustable states, thus resolving the contradiction between simplicity and adjustability.
2Volume of moving object
If the tool platform is folded to reduce logistical size, then the packaging efficiency is improved, but the ladder length cannot be changed and height cannot be adjusted
Solution Approach 1:
The connector incorporates movable plug pins guided by elastic parts, allowing the small tube to be extended or retracted relative to the big tube. This dynamic mechanism enables height adjustment even when the tool platform is folded, maintaining adaptability while achieving compact logistical size.
Solution Approach 2:
The small tube is nested within the big tube, and the connector components are compactly arranged. This nesting arrangement allows the ladder to achieve a compact folded state for efficient packaging while maintaining the capability for height adjustment through the relative movement of the nested tubes.
3Reliability
If plug pins are used for positioning, then stable positioning is achieved, but the structure becomes more complex
Solution Approach 1:
The elastic part automatically pushes the plug pin into the positioning holes without requiring external intervention. This self-service mechanism achieves reliable positioning while minimizing structural complexity, as the elastic part inherently provides both the positioning force and the restoring force needed for adjustment.
Solution Approach 2:
The elastic part acts as an intermediary between the plug pin and the positioning holes, providing the necessary force to engage and disengage the positioning mechanism. This intermediary component simplifies the overall structure by consolidating multiple functions (positioning, locking, and releasing) into a single elastic element.
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 stable and adjustable positioning of the tool platform, reducing logistical and packaging size, and allowing users to climb the ladder more securely by adjusting the height as needed.
Implementation Method 1
the elastic parts apply an acting force to the plug pins to make the plug pins tend to position the small tubes
Data Source
AI summary
A lifting positioning structure for a ladder tool platform comprises a ladder. The ladder comprises front supporting legs, rear supporting legs, connectors fixedly connected to the front supporting legs, plug pins, and elastic parts, wherein each front supporting leg includes a big tube and a small tube which are able to relatively move in an extension direction. The connectors are formed with vertically-through installation cavities which allow the big tubes to be inserted therein. The big tubes are arranged in the installation cavities and are fixedly connected to the connectors which extend to form connection parts rotationally connected to the rear supporting legs. The small tubes are connected to a tool platform. The plug pins are movably arranged on the connectors or the big tubes.