Balanced Eccentric Massage Head Assembly for Efficient Vibration
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Solution Overview
Problem
Existing massage devices suffer from low energy efficiency due to the mismatch in weight between the vibrating part and the motor part, leading to deflected circular movements that consume a large amount of energy, reducing the energy transmitted to the massage head.
Innovation Solution
A massage device with a balancing member on the electric motor to balance eccentric forces, ensuring balanced circular rotation of the eccentric member, rotor, and output shaft, converting motor energy into efficient vibrations without deflection, and incorporating a buffer assembly to reduce vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the weight of the vibrating part and motor part are mismatched, then the massage device can be simpler in structure, but the energy efficiency deteriorates due to deflected circular movements
Solution Approach 1:
A balancing member is added to the motor assembly to counterbalance the eccentric mass. The balancing member rotates with the rotor and generates an opposing centrifugal force that compensates for the unbalanced weight, eliminating deflected circular movements and improving energy efficiency without significantly complicating the overall structure.
2Loss of energy
If a balancing member is added to balance eccentric forces, then energy efficiency improves, but device complexity increases
Solution Approach 1:
The balancing member is integrated into the motor assembly and rotates together with the rotor. This merging approach allows the balancing function to be achieved without adding independent rotating components, thereby improving energy efficiency while minimizing the increase in device complexity.
3Device complexity
If the eccentric member performs deflected circular movement, then the structure can be simpler, but the vibration quality deteriorates
Solution Approach 1:
The balancing member counteracts the unbalanced forces generated by the eccentric member during deflected circular movement. By generating an opposing centrifugal force, it stabilizes the vibration pattern and improves vibration quality while maintaining the simplicity of the eccentric drive structure.
4Power
If motor power is maintained, then the energy transmission to massage head should be high, but it deteriorates due to energy loss in deflection
Solution Approach 1:
The balancing member eliminates energy-wasting deflected circular movements by counterbalancing the eccentric mass. This ensures that the motor power is transmitted efficiently to the massage head through straight circular rotation, maximizing energy transmission efficiency while maintaining motor power output.
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
Improves energy efficiency and vibration quality of the massage head by balancing eccentric forces, maintaining motor power, and stabilizing the handheld assembly for enhanced user experience.
Implementation Method 1
a centrifugal force generated by the eccentric member during rotation is equal to a centrifugal force generated by the side of the electric motor
Implementation Method 2
The buffer assembly is elastic or flexible,one end of the buffer assembly abuts the end of the massage head
Data Source
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AI summary
The present disclosure provides a massage device, including a massage head having at least one massage surface and an assembly space; a mounting bracket mounted in the assembly space and fixed to the massage head; an electric motor and an eccentric member arranged in the assembly space and located on opposite sides of the mounting bracket; and a balancing member located on the same side of the mounting bracket as the electric motor. The electric motor includes a stator, a rotor, and an output shaft; the stator is fixed to the mounting bracket, the rotor is rotatable relative to the stator, andthe output shaft is fixed to the rotor and is rotatably connectedto the mounting bracket. The eccentric member is fixed to the output shaft to rotate eccentrically with the output shaft, and the balancing member is connected to the rotor or the output shaft.