Portable Drink Blender with Offset Blade Axis for Straw-Safe Operation
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Solution Overview
Problem
Existing portable blenders lack safety and reliability features, particularly in preventing accidental activation and leakage, and do not allow for safe use with straws due to blade positioning and split spout designs.
Innovation Solution
A portable drink blender with offset blade rotation axis, a unitary leak-proof spout, and a cap that seals the spout when closed, featuring a power switch recessed to prevent accidental activation and a secure interlock mechanism using magnets and Hall effect switches to ensure safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If blender blades are positioned on the central axis of the tumbler, then blending efficiency is improved, but safety is worsened due to risk of finger injuries near the spout
Solution Approach 1:
The blender blades are positioned on an offset axis rather than the central axis of the tumbler. This asymmetric positioning moves the rotating blades away from the spout area, eliminating the hazard zone where fingers could be injured during operation while maintaining effective blending capability.
2Ease of manufacture
If the spout is designed as a separate component, then manufacturing is simplified, but reliability is worsened due to potential leakage at connection points
Solution Approach 1:
The spout is integrated directly into the cap as a unitary structure rather than being a separate component. This merging of the spout with the cap eliminates connection points where leakage could occur, improving reliability while maintaining manufacturability through integral molding.
3Ease of operation
If the power switch is easily accessible on the cap, then ease of operation is improved, but safety is worsened due to risk of accidental activation
Solution Approach 1:
A cap interlock mechanism is implemented that prevents the power switch from being activated unless the cap is properly closed and secured to the tumbler. This preliminary safety action blocks accidental activation while still allowing easy operation when the cap is correctly positioned.
Solution Approach 2:
The cap itself acts as an intermediary between the user and the power switch. The interlock mechanism requires the cap to be in a specific position to enable switch operation, using the cap as a mediating element that ensures safe operating conditions before allowing activation.
4Reliability
If the cap is designed to seal the spout when closed, then reliability is improved by preventing leakage, but device complexity is worsened due to additional sealing mechanisms
Solution Approach 1:
The sealing function is merged into the cap-spout integral structure. The cap is designed with built-in sealing surfaces and gaskets that engage with the spout and tumbler rim, creating leak-proof seals without requiring separate, complex sealing mechanisms or additional components.
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
Enhances safety by preventing finger injuries and leakage, allows use with straws, and ensures reliable operation by ensuring the blender can only be activated with the cap closed, maintaining a leak-proof design.
Implementation Method 1
an electric motor, said cap having an upper face and a lower face, a spout extending through and extending from said upper face of said cap, and blender blades mounted for rotation by a rotation shaft extending from said lower face of said cap, wherein said rotation shaft is operatively connected to said electric motor
Implementation Method 2
a secure interlock mechanism using magnets and Hall effect switches to ensure safe operation
Data Source
Figure 1~2
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Figure 5~6
AI summary
A portable drink blender includes a blade rotation axis offset from center such that the blender blades to not extend across in interior of the drinking spout. The motor housing is formed of a lower housing having the complete spout formed therein, and an upper housing including an aperture through which the spout extends. A cover interlock is provided which prevents operation of the motor unless the cover is in the closed position to seal the spout closed.