Hand-held electric mixer
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Solution Overview
Problem
Existing hand-held mixers with ejectors do not have adequate protection against accidental swapping of working members, which can lead to incorrect positioning and potential damage to the drive unit.
Innovation Solution
The hand-held mixer incorporates an ejector with different heights of working surfaces and varying lengths of working member shanks, ensuring that if a working member is incorrectly positioned, it will not be fixedly fastened due to the blocking action of the ejector, preventing accidental swapping and protecting against damage to the drive unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an ejector is provided to disengage working members from spindles, then ease of operation is improved, but protection against accidental swapping of working members deteriorates
Solution Approach 1:
The ejector features asymmetric working surfaces at different heights relative to the mounting plane. The first working surface is positioned at a first height while the second working surface is positioned at a second height, creating an asymmetric configuration that prevents accidental swapping of working members with the ejector while maintaining ease of operation
Solution Approach 2:
The different heights of the working surfaces are predetermined in the design to prevent swapping before it can occur. By positioning the working surfaces at different heights during manufacturing, the system proactively prevents incorrect insertion of working members, eliminating the need for additional protective mechanisms
Data Source
Figure 1~2
Figure 3~4
AI summary
A hand-held mixer provided to drive a first working member (11) and a second working member (12) through included in its housing (1) spindles (31, 32), having fastening elements (24, 25) and a toothed ring transmitting the torque from a motor shaft. It has an ejector (26), which has a first part (27) and a second part (28) of a working surface (35), located at different heights in relation to mounting plane (21).