Juicer Feed Tube Trigger Assembly With Non-Contact Magnetic Sensing
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Solution Overview
Problem
Existing juicer safety mechanisms face issues due to mechanical fatigue, increased complexity and cost from wire connections, and susceptibility to external magnetic interference, which can lead to unsafe operation.
Innovation Solution
A juicer design featuring a linkage assembly with a pressure component, follower lever, and magnetic inductors/sensors that provide a non-contact trigger system, reducing wire complexity and preventing external magnetic interference by requiring simultaneous detection from multiple sensors to initiate motor operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnetic switch is set on the top of the feed tube to enable non-contact triggering, then the mechanical wear and service life issues are resolved, but the wire connection becomes complicated and cost increases
Solution Approach 1:
The patent combines the magnetic switch and inductor into an integrated trigger assembly located at the bottom of the feed tube, merging the triggering function with the existing structural components. This integration eliminates the need for separate wire connections to the top of the feed tube, reducing wiring complexity while maintaining non-contact magnetic triggering reliability
Solution Approach 2:
Instead of placing the magnetic switch at the top of the feed tube as in conventional designs, the patent inverts the arrangement by positioning the magnetic switch and inductor at the bottom of the feed tube. This inversion allows the magnetic trigger to be activated by the pusher from below, eliminating the need for long wire runs to the top and simplifying the overall wiring structure
2Device complexity
If a single magnetic switch is used for motor control, then the structure is simple, but external magnetic interference can cause wrong running
Solution Approach 1:
The patent divides the motor control function into multiple independent magnetic switches (first magnetic switch and second magnetic switch) instead of using a single switch. Each switch is controlled by separate magnetic triggers, segmenting the control system to prevent a single external magnetic interference from activating the motor, thereby improving safety while maintaining structural simplicity
Solution Approach 2:
The patent implements a feedback control mechanism where multiple magnetic switches and inductors work together to verify the correct insertion of the pusher before enabling motor operation. The system requires specific magnetic field conditions to be met simultaneously, providing feedback validation that prevents wrong running from external magnetic interference
3Device complexity
If mechanical micro switch and trigger assembly are used, then the structure is simple and cost is low, but fatigue wear causes reliability degradation over time
Solution Approach 1:
The patent replaces the conventional mechanical micro switch and trigger assembly with a non-contact magnetic switching system. The magnetic switch and inductor eliminate mechanical contact, substituting the mechanical triggering mechanism with a magnetic field-based system that avoids fatigue wear and contact degradation, thereby significantly improving long-term reliability while keeping the overall structure simple
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
This design enhances reliability and safety by reducing production costs, eliminating wire complications, and preventing unintended motor activation from external magnetic sources.
Implementation Method 1
a magnetic switch is set inside the feed tube, the magnetic switch is connected electrically to motor, a magnetic driving unit is set in the pusher, when the pusher is inserted into the feed tube, the magnetic switch receives the signal of the magnetic driving unit so that the power is on
Implementation Method 2
the trigger assembly includes two signal generators connected to the end of the follower lever and three inductors configured at the base; the three inductors are connected electrically with the motor's control circuit
Data Source
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AI summary
A juicer includes a linkage assembly (2) operated with a pusher (1) and a trigger assembly (3) for allowing power to be supplied to motor. The linkage assembly (2) includes a pressure component (21) set in the end of the opening of feed tube (71). The pressure component (21) is connected with a follower lever (22), the follower lever (22) installed in the inside of the feed tube (71) can be moved up and down. The trigger assembly (3) includes some signal generators (31) installed in the bottom of the follower lever (22) and some inductors (32) installed in juicer base (6) are corresponded to the signal generators (31). The inductors (32) are connected electrically with motor's control circuit. The present invention avoids trouble from lengthy wires in circuit connection and shortens running length of the trigger assembly and lowers cost and machining accuracy.