Coiling Device With Dual Bobbins Prevents Power Cord Twisting
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Solution Overview
Problem
Existing coiling devices in household appliances pose safety hazards due to the reliance on elastic pieces and contact structures for managing power cord transitions between straight and circular configurations, leading to potential twisting and reliability issues.
Innovation Solution
A coiling device with a first and second coiling bobbin, where the power cord segments are wound in identical directions, and a ratchet mechanism limits rotation to prevent twisting, eliminating the need for elastic pieces and contact structures by using a housing with a rotary shaft and a drive assembly that includes a coil spring for automatic coiling and unwinding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If elastic pieces and contact structures are used to manage power cord transitions, then the power cord can be converted between straight and circular configurations, but safety hazards and reliability issues arise due to potential twisting and mechanical stress
Solution Approach 1:
The power cord is divided into multiple segments (first segment, second segment, third segment) that are independently wound on separate bobbins. This segmentation allows each segment to be managed independently, preventing twisting at connection points while maintaining the ability to convert between straight and circular configurations.
Solution Approach 2:
The invention transitions from a single-plane coiling mechanism to a multi-dimensional system with multiple bobbins arranged in space. The first and second bobbins are positioned at different locations, allowing the power cord to be wound in three-dimensional space, which eliminates twisting while maintaining configurability.
2Device complexity
If a single coiling bobbin is used, then the device structure is simple, but the power cord twists at the connection point during unwinding
Solution Approach 1:
The coiling device is segmented into multiple independent bobbins (first coiling bobbin, second coiling bobbin) that can rotate independently. This allows different segments of the power cord to be wound and unwound simultaneously in a coordinated manner, preventing twisting at connection points while keeping each individual bobbin structurally simple.
Solution Approach 2:
The third coiling bobbin acts as an intermediary element between the first and second bobbins. It receives the second segment of the power cord and transitions it to the third segment, coordinating the unwinding process to prevent twisting while maintaining overall system simplicity.
3Adaptability or versatility
If elastic pieces and contact structures are used for power supply connection, then connection is maintained during cord conversion, but safety hazards arise from reliability issues
Solution Approach 1:
The invention extracts and eliminates the elastic pieces and contact structures from the system. Instead of using these potentially hazardous components, the patent employs a mechanical coiling system with multiple bobbins that maintains power supply connection through coordinated unwinding, thereby removing the source of safety hazards while preserving adaptability.
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
The solution ensures the power cord is unwound without twisting at the connection point, enhancing safety by maintaining consistent winding directions and using a ratchet mechanism to control rotation, thus preventing mechanical stress on the cord.
Implementation Method 1
a drive assembly that includes a coil spring for automatic coiling and unwinding
Implementation Method 2
a first limiting portion is provided on the first coiling bobbin, and the coiling device further comprises a second limiting portion fitting with the first limiting portions to limit a rotation angle of the first coiling bobbin; and wherein the coiling device is further comprising a housing, the first coiling bobbin is provided on the housing rotatably, the first limiting portion is a ratchet provided at the periphery of the first coiling bobbin
Data Source
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AI summary
The invention discloses a coiling device and a household appliance having same. The coiling device is configured to coil a power cord. The power cord comprises a first segment (91) and a second segment (92) connected to each other. The coiling device includes: a first coiling bobbin (10), provided with a first coiling groove, the first segment of the power cord being wound in the first coiling groove; and a second coiling bobbin (20), connected with the first coiling bobbin fixedly and provided with a second coiling groove, the second segment of the power cord being wound in the second coiling groove, and a winding direction of the second segment of the power cord being identical to that of the first segment of the power cord. By arranging the first coiling bobbin and the second coiling bobbin and setting the winding directions of the first segment and the second segment of the power cord to be identical, the power cord can be prevented from being twisted at a point of connection between the first segment and the second segment, and therefore the aim of improving use safety can be achieved without an elastic piece and contact structure.