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 attached to the lid, and not easily removable, limiting adaptability and maintenance.
Innovation Solution
A self-contained, removable pull string drive device with a locking system that temporarily fastens to the lid, allowing for easy attachment and detachment, and includes a locking mechanism to prevent rotational and translational movement, ensuring versatility and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pull string drive mechanism is permanently attached to the lid during assembly, then the structural stability and reliability are improved, but the adaptability and ease of maintenance deteriorate
Solution Approach 1:
The pull string drive mechanism is segmented into a separate removable module that can be independently attached to and detached from the lid. This modular design allows the mechanism to be structurally stable when attached while maintaining adaptability for different applications and ease of maintenance through independent removal.
Solution Approach 2:
The attachment system transitions from a permanent fixed connection to a dynamic reversible connection. The locking system enables the mechanism to be securely fastened during operation for stability, yet easily removed when maintenance or adaptation is needed, providing dynamic flexibility.
2Reliability
If the pull string drive mechanism is permanently attached to the lid, then the structural stability is improved, but the ease of repair and maintenance deteriorate
Solution Approach 1:
By segmenting the drive mechanism into a separate removable module, the patent enables independent access to the mechanism for maintenance without disassembling the entire appliance. The locking system secures it during operation but allows easy removal for repair.
Solution Approach 2:
The drive mechanism is extracted as a separate serviceable component that can be removed from the lid. This extraction enables direct access to the mechanism for maintenance, repair, or replacement without affecting other parts of the appliance.
3Ease of manufacture
If the pull string drive mechanism is pre-assembled in the lid, then the manufacturing integration is improved, but the device complexity and assembly difficulty increase
Solution Approach 1:
The patent divides the manufacturing process into separate stages: the drive mechanism is manufactured and tested as an independent module, then attached to the lid using the locking system. This segmentation simplifies both manufacturing and assembly by allowing standardized module production.
Solution Approach 2:
The locking system acts as an intermediary interface between the drive mechanism and the lid. This standardized interface simplifies the assembly process by providing a clear attachment procedure without requiring complex integration of the mechanism into the lid structure.
4Reliability
If the pull string drive mechanism is permanently connected to the lid, then the structural stability is improved, but the adaptability to different appliances deteriorates
Solution Approach 1:
The locking system is designed as a universal interface that can accommodate different lid types and appliance configurations. This universality allows the same drive mechanism to be adapted to various kitchen appliances while maintaining structural stability through the locking connection.
Solution Approach 2:
The reversible locking system provides dynamic adaptability, allowing the mechanism to be securely attached for stable operation yet easily removed and transferred to different appliances or configurations as needed.
Data Source
AI summary
A kitchen appliance includes a work unit having a bowl, a lid and a rotary accessory rotatable around a rotational axis; a pull string drive device including a main body, a drive wheel housed in the main body, a string configured to be wound around the drive wheel, and a handle connected to the string, the pull string drive device being configured to manually rotate the rotary accessory by pulling the string transversely to the rotational axis; and a locking system configured to fasten the main body temporarily and reversibly to the lid, and to prevent rotational movement of the main body relative to the lid and along the rotational axis.