Kitchen Appliance Safety Interlock With Dual Pivot Actuators
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Solution Overview
Problem
Existing kitchen appliances with safety devices face challenges in ensuring safe operation and preventing injuries from rotating tools, as mechanical plungers require precise alignment and can be hazardous due to sharp edges, and existing solutions are complex and difficult to implement.
Innovation Solution
A kitchen appliance with a safety device featuring two pivotably mounted actuation devices that must be actuated in a specific sequence to enable the electric motor to start, ensuring proper assembly and preventing uncontrolled startup, utilizing an arcuate design and elastic means for controlled pivoting and space-saving configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical plungers are used for safety switching, then the electric motor can be prevented from starting without proper assembly, but the alignment precision required increases and the implementation effort becomes considerable
Solution Approach 1:
The safety device is divided into two separate actuating devices instead of using a single complex plunger mechanism. Each actuating device can be independently actuated by different accessories, simplifying the overall implementation while maintaining reliable safety switching through the combination of both devices being activated
Solution Approach 2:
The actuating devices are designed with arcuate actuation areas that can be actuated by various types of accessories (mixing bowls with lids, food processing attachments, etc.). This universal design allows the same safety mechanism to work with multiple different accessory types without requiring precise alignment for each specific accessory
2Reliability
If mechanical plungers with narrow engagement surfaces are used, then reliable switching can be achieved, but the risk of user injury increases due to sharp or knife-like plunger edges
Solution Approach 1:
The actuating devices feature arcuate (curved) actuation areas instead of narrow, sharp-edged plunger surfaces. This curved geometry provides a broader, more forgiving engagement surface that reduces the risk of user injury while maintaining reliable switching activation through the arc-shaped contact area
3Reliability
If multiple actuating devices are used to increase safety, then operating errors are reduced, but the device complexity and space requirements increase
Solution Approach 1:
The actuating devices are arranged in different spatial dimensions and orientations within the housing, allowing multiple safety actuation points to be distributed efficiently throughout the available space. This multi-dimensional arrangement increases safety through multiple actuation points while minimizing the overall volume occupied by the safety device
Data Source
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AI summary
A kitchen appliance (1), having a safety device (10), is provided, which comprises a first actuating device (11), a second actuating device (12) and a control device (20) for controlling an activation of the kitchen appliance (1), wherein the control device (20) is configured so as to control the activation of the kitchen appliance (1) upon actuation of the first and the second actuating device (11, 12), and wherein at least one of the first or the second actuating devices (11, 12) is pivotally mounted and configured so as to be actuated by a kitchen appliance attachment.