Waterproof Fan Cable Fixing Structure Using Pressing Protrusion
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Solution Overview
Problem
Blower fans often have unstable power line connections, which can lead to movement or separation of the power line under external forces, potentially causing impact and compromising the waterproof seal, especially in fan applications where moisture protection is crucial.
Innovation Solution
A structure featuring a coupling ring with a pressing protrusion that securely couples to the outer circumference of an insertion tube, using a bent member and auxiliary protrusions to maintain the power line's position and prevent moisture ingress, ensuring stable attachment and easy detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the power line is connected to the power supply device without stable fixation, then the connection is simple and easy to assemble, but the power line moves under external force and impact is applied to the connecting portion
Solution Approach 1:
The power line fixation system is divided into separate functional components: the insertion tube providing the basic connection pathway, the coupling ring providing external attachment, and the pressing protrusion providing internal securing force. This segmentation allows each component to perform its specific function optimally while maintaining overall simplicity of assembly.
Solution Approach 2:
The pressing protrusion is pre-formed on the coupling ring before assembly, positioned to automatically engage with the insertion tube when the coupling ring is installed. This preliminary preparation ensures that the power line is secured without requiring additional fastening steps or complex assembly procedures.
2Reliability
If the power line is stably fixed with complex fixation structures, then the power line position is maintained and impact is prevented, but the structure becomes complicated and difficult to assemble
Solution Approach 1:
The coupling ring integrates multiple functions into a single component: it provides structural support for the power line connection, houses the pressing protrusion for securing the power line, and offers an external interface for attachment to the power supply device. This merging eliminates the need for separate fixation components, reducing overall structural complexity.
Solution Approach 2:
The pressing protrusion automatically engages with the insertion tube when the coupling ring is installed, creating a self-securing mechanism that maintains power line stability without requiring additional fastening operations or complex adjustment procedures.
3Ease of manufacture
If the power line connection allows movement, then the structure is simple and easy to manufacture, but moisture can permeate into the coupling portion and waterproof performance deteriorates
Solution Approach 1:
The pressing protrusion is pre-formed on the coupling ring to automatically engage with the insertion tube during assembly, creating a secure seal that prevents moisture ingress without requiring additional sealing components or complex manufacturing processes.
Solution Approach 2:
The pressing protrusion acts as an intermediary element between the coupling ring and insertion tube, transmitting securing force to maintain a tight connection that prevents moisture permeation while keeping the overall structure simple and manufacturable.
4Reliability
If the power line is securely fixed to prevent movement and detachment, then reliability is improved, but the power line cannot be easily detached when needed
Solution Approach 1:
The coupling ring provides a dynamic fixation system where the pressing protrusion maintains constant securing force on the power line during operation, yet allows for easy release when the coupling ring is deliberately removed, enabling both stable operation and convenient maintenance.
Solution Approach 2:
The pressing protrusion is pre-positioned to engage automatically during assembly, providing immediate secure fixation. For detachment, the entire coupling ring can be removed as a single unit, allowing easy power line extraction without requiring disassembly of complex fastening mechanisms.
Data Source
AI summary
A structure for fixing a cable for a waterproof fan case according to the present disclosure includes: a frame on which a motor is installed, and a blade is rotatably installed in a state in which a driving shaft of the motor is connected to a front side thereof; an insertion tube which extends rearward from the frame, has therein an insertion hole to which a power line connected to the motor is penetratively coupled in a front and rear direction, and has a gap portion formed to be split at one side in a transverse direction; and a coupling ring which has a hollow portion that is penetratively formed in the front and rear direction so that the coupling ring is correspondingly coupled to an outer circumference of the insertion tube in a male-female manner, and has a pressing protrusion that is formed to protrude on an inner circumferential surface of the coupling ring so as to press and support an outer circumference of the power line through the gap portion when coupling the coupling ring to the insertion tube.