Kitchen Appliance With Detachable Pull String Drive Device
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Solution Overview
Problem
Existing manually-operated pull string drive mechanisms in kitchen appliances are complex to assemble, permanently integrated into the lid, and not easily adaptable to different appliance shapes and geometries, limiting their versatility and maintenance.
Innovation Solution
A self-contained, detachable pull string drive device with a drive wheel, return spring, and bayonet fastening system that allows for easy attachment and detachment from various kitchen appliance lids, enabling separate manufacturing, use, and maintenance, and facilitating adaptation to different shapes and sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the pull string drive mechanism is permanently integrated into the lid during assembly, then the assembly structure is simplified, but the device cannot be removed, moved, or repaired separately
Solution Approach 1:
The pull string drive mechanism is segmented from the lid structure, creating a separate removable module. The drive wheel assembly with string spool, handle, and spring can be independently removed from the lid, allowing separate manufacturing, repair, and replacement while maintaining assembly simplicity through standardized interfaces.
Solution Approach 2:
The connection between the drive mechanism and lid transitions from permanent to dynamic/removable. The drive wheel assembly incorporates features that allow it to be easily attached and detached from the lid, enabling the system to adapt between fixed and removable states based on operational needs.
2Ease of manufacture
If the drive mechanism is assembled inside the lid, then integration is achieved, but the mechanism becomes inaccessible for maintenance and cannot be separated from the lid
Solution Approach 1:
The drive mechanism components (drive wheel, string spool, handle, spring) are extracted from the lid interior and formed as a separate removable assembly. This allows the mechanism to be easily accessed for maintenance, repair, or replacement by simply detaching it from the lid without disassembling the entire appliance.
Solution Approach 2:
The drive mechanism is segmented as a distinct module that can be independently removed from the lid, providing full accessibility to all internal components for maintenance while maintaining integration during normal operation through a secure attachment interface.
3Stability of the object's composition
If the drive mechanism is permanently joined to the lid, then structural integrity is maintained, but the device cannot be adapted to different kitchen appliance shapes and geometries
Solution Approach 1:
The drive wheel assembly is designed as a universal module that can be attached to various lid geometries and kitchen appliance types. The standardized attachment interface and adjustable mounting features enable the same drive mechanism to adapt to different appliance shapes and sizes while maintaining secure structural connection during operation.
Solution Approach 2:
The connection system allows the drive mechanism to transition between removable and securely fixed states, enabling adaptation to different appliance configurations while maintaining structural integrity during use. The dynamic attachment permits geometric flexibility without compromising operational stability.
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 simplifies assembly, enhances versatility by allowing the drive device to be moved between appliances, facilitates cleaning, and improves industrial autonomy, ensuring the device can be easily attached and detached without affecting the food processing operation.
Implementation Method 1
a return spring, all positioned coaxially relative to the rotation axis A
Data Source
AI summary
A kitchen appliance includes a self-contained pull string drive device and a work unit. The device is configured for manually rotating a work unit around a rotation axis by pulling a string transversely to the rotation axis A. The device includes a drive wheel, a return spring, all positioned coaxially relative to the rotation axis A, a string, one end of which is wound around the drive wheel and the other end of which is connected to a handle. The work unit includes a lid closing a bowl. The pull string drive device is configured to be detachable from the lid of the bowl. The lid includes a male or female part joined to a drive interface, to cooperate with the drive wheel by mechanical coupling in order to transmit a rotational movement from the device to the work unit.