Blender Induction Coil Interlock for Reliable Lid Detection
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Solution Overview
Problem
Conventional blender interlock systems are ineffective in consistently signaling the presence of a lid, take up extra space, and are prone to operational issues due to motor vibrations, making them difficult to clean and inefficient.
Innovation Solution
A container interlock system using induction coils and a bridge coil assembly to electronically ensure the lid is securely attached before allowing motor operation, eliminating mechanical connections and vibration-related issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical interlock systems with physical connections are used, then the lid position can be detected, but the system takes up extra space and is prone to operational issues due to motor vibrations
Solution Approach 1:
The patent replaces mechanical interlock systems with an inductive sensing system that uses electromagnetic fields to detect lid position. The inductive sensor detects changes in inductance or resonant frequency caused by the presence of the lid, eliminating the need for mechanical arms, links, springs, or other physical connection paths. This substitution resolves the contradiction by maintaining reliable lid detection while removing the complex mechanical components that took up space and were susceptible to vibration-related operational issues.
2Reliability
If mechanical interlock systems are used, then the lid position can be detected, but the system is difficult to clean and maintenance is complicated
Solution Approach 1:
By replacing mechanical interlock components with an inductive sensing system, the patent eliminates parts that require cleaning and maintenance. The inductive sensor has no moving parts, no mechanical connections to food or liquid, and no components that accumulate residue. This makes the system easy to clean and maintain while preserving reliable lid position detection.
3Device complexity
If inductive coils are used for lid detection, then space is reduced and vibration issues are eliminated, but the system must ensure electronic isolation when container is not positioned
Solution Approach 1:
The inductive sensing system incorporates feedback mechanisms that monitor the electrical characteristics of the sensing circuit. When the container is not positioned on the base, the system detects the absence of the characteristic inductance change and automatically isolates the electronic components. This feedback-based isolation ensures reliable operation by preventing false signals while maintaining the space-efficient, vibration-free design.
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 system provides reliable and space-efficient lid detection, reducing operational failures and simplifying cleaning by using wireless transmission to ensure consistent motor operation only when the lid is properly secured.
Implementation Method 1
An interlock assembly having a plurality of induction coils may be provided to engage a switch device when the lid is attached to the container to cover the open end and the container is operably engaged to the base. The interlock assembly may include at least one transmitter coil and at least one receiver coil mounted to a pad positioned on the base.
Implementation Method 2
An interlock detector may be attached to the base for detecting a position of the lid relative to the container to allow operation of the motor.
Data Source
AI summary
A blending system is shown and described herein. The blending system may include a base including a motor, a blade selectively and operably engaged with the base, where the motor rotates the blade, a container having an open end and a lid configured to cover the open end. The blending system may also include an interlock system that may include a plurality of induction coils positioned on the base and the container and be in electrical communication with at least one lid sensor, wherein the power is translated through the induction coils to engage a switch device to complete a power circuit to allow a user to operate the motor of the blender.