Transport Trolley Ground Anchoring via Fixing Screw
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Solution Overview
Problem
Existing solutions for protecting belongings on sandy beaches, such as waterproof containers, do not provide adequate security against theft and are not practical for everyday use, especially when users leave their items unattended for swimming.
Innovation Solution
A transport trolley with a frame, wheels, a support, and a variable diameter ring secured by a fixing screw that is screwed into the ground, combined with a secure container and a lock, to deter theft by making it difficult to discreetly remove the trolley.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixing screw is used to secure the trolley to the ground, then theft prevention is improved, but the device complexity increases
Solution Approach 1:
The patent combines the fixing screw mechanism with the trolley frame by integrating the ring directly into the frame structure. The fixing screw passes through this integrated ring to secure the trolley, merging the securing function with the existing frame rather than adding a separate complex anchoring system.
Solution Approach 2:
The patent extracts the essential securing function by using a simple fixing screw that passes through a ring in the frame, separating the theft prevention mechanism from the main trolley structure. This allows the securing function to be implemented with minimal additional components while maintaining reliability.
2Reliability
If a secure container with lock is added to the trolley, then theft prevention is improved, but the device complexity increases
Solution Approach 1:
The patent segments the trolley into functional components: a main frame for transport, and a separate secure container with lock for valuable items. This segmentation allows the security function to be added as a distinct module rather than integrating complexity throughout the entire structure.
Solution Approach 2:
The secure container with lock is nested within or attached to the trolley frame, creating a layered security system where the container provides an additional protection layer for valuable items without requiring a complete redesign of the trolley structure.
3Adaptability or versatility
If the ring diameter is made variable to accommodate different fixing screw sizes, then adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent implements a variable diameter ring that can dynamically adjust its size to accommodate different fixing screw diameters. The ring transitions from a fixed structure to a dynamic one that can expand or contract, allowing the same ring to work with multiple screw sizes without requiring multiple different rings.
Solution Approach 2:
The patent changes the physical parameter of the ring from a fixed diameter to a variable diameter, allowing the ring to adapt to different fixing screw sizes. This parameter change enables versatility in the securing mechanism without adding multiple separate components.
Data Source
Figure 1~2
Figure 3~4
AI summary
The transport trolley comprises a frame (1) equipped with a handle (5), a pair of wheels (2), and a support (3). The transport trolley has a ring (6) attached to the frame (1). The ring (6) defines a first value of internal diameter. A fixing screw (7) has an external diameter larger than the internal diameter of the ring (7). The fixing screw (7) passes through the ring (6) to secure the transport trolley to the ground by screwing into the ground.