Wall-Mounted Fan Anti-Falling Rope Structure for Connector Failure
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Solution Overview
Problem
Traditional suspended fans pose safety hazards due to loosening connectors, which can lead to the entire fan falling and causing injuries or damage, primarily due to vibration, humidity changes, and material aging, exacerbated by centrifugal forces during operation.
Innovation Solution
An anti-falling rope is connected to the fixed shaft of the fan, with a connection structure to securely attach the rope to the shaft and mounting portion, ensuring the fan remains fixed even if the primary connection fails, using a hollow fixed shaft design and wire threading holes for secure rope attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional rigid connectors (bolts and snaps) are used to connect the fixed shaft to the mounting portion, then the installation structure is simple and easy to manufacture, but the connectors are prone to loosening due to vibration, humidity changes, and material aging, leading to safety hazards
Solution Approach 1:
The patent introduces an anti-falling rope as a preliminary safety measure that is installed alongside the primary rigid connectors. This rope acts as a pre-prepared safety backup that activates only when the primary connection fails, preventing the fan from falling without interfering with normal operation. This resolves the contradiction by adding reliability through a safety buffer without significantly increasing structural complexity.
Solution Approach 2:
The anti-falling rope serves as an intermediary safety component between the fan assembly and the mounting structure. It provides an alternative load-bearing path that activates when the primary rigid connectors fail, mediating the failure mode to prevent catastrophic falling while maintaining the simplicity of the original rigid connection structure.
2Reliability
If traditional rigid connectors are used, then the device structure is simple, but the connectors accelerate wear and loosening due to centrifugal force during operation
Solution Approach 1:
The anti-falling rope is pre-installed as a safety backup that becomes active when centrifugal forces cause the primary connectors to loosen or fail. It provides immediate support to counteract the lateral loads generated during fan operation, preventing connector failure from leading to fan falling.
Solution Approach 2:
The patent changes the load-bearing parameters of the connection system by introducing a flexible rope element that can dynamically adjust to lateral loads. The rope provides continuous tension support that complements the rigid connectors, distributing the centrifugal forces more evenly and reducing the stress concentration on the primary connection nodes.
3Object-affected harmful factors
If no anti-falling protection is provided, then the device complexity is low, but the fan may fall from height causing injuries or damage
Solution Approach 1:
The anti-falling rope is installed in advance as a safety buffer that only activates when needed. It provides passive protection against falling hazards without requiring active monitoring or control systems, minimizing the increase in device complexity while effectively addressing the safety hazard.
Solution Approach 2:
The anti-falling rope is designed as a simple, replaceable safety component that can be easily installed and replaced if needed. It provides critical safety protection through a relatively simple structure, accepting that the rope may need periodic replacement while maintaining overall system simplicity.
Data Source
AI summary
A fan with an anti-falling structure, including a mounting portion configured to be fixed to a wall, a fixed shaft connected to the mounting portion, a drive motor rotatably connected to the fixed shaft, and a plurality of fan blades fixed to the drive motor. An anti-falling rope is connected to an upper end or a lower end of the fixed shaft, and a connection structure is provided between a lower end of the anti-falling rope and the fixed shaft to fixedly connect them. An upper end of the anti-falling rope is fixed to the mounting portion or the wall. In this way, the anti-falling rope may restrain the drive motor when the connection structure between the mounting portion and the fixed shaft fails, preventing the drive motor and components connected thereto from falling, thereby avoiding injury to personnel below or damage to furniture.