Percussive Massage Device Vibration Isolation via Fixing Frame
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Solution Overview
Problem
Percussion massagers generate excessive vibration and noise due to the direct transmission of motor and reciprocating assembly vibrations, making them inconvenient to use in quiet environments and potentially unsafe when used near the head.
Innovation Solution
The percussion massager features a fixing frame that absorbs and counteracts vibrations and noise by mounting the motor and reciprocating assembly on a solid platform, with damping devices between the frame and housing to reduce vibration and noise, allowing for safe and quiet operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the motor and reciprocating assembly are directly mounted on the housing using elongated mounting holes, then the device structure is simple and easy to manufacture, but excessive vibration and noise are generated during operation
Solution Approach 1:
A fixing frame is introduced as an intermediary component between the motor assembly and the housing. The fixing frame includes mounting holes that allow flexible mounting while isolating the vibration sources from the housing, thereby reducing vibration and noise transmission to the user.
Solution Approach 2:
The mounting structure is segmented into multiple components: the housing, the fixing frame with mounting holes, and the motor assembly. This segmentation allows the fixing frame to absorb and dampen vibrations independently while maintaining the structural integrity of the overall device.
2Device complexity
If the motor and reciprocating assembly are fixed only by elongated mounting holes, then the device structure is simple, but vibration is directly transmitted to the upper housing and lower housing causing loud noise
Solution Approach 1:
The fixing frame serves as a mediator that interrupts the direct vibration transmission path between the motor assembly and the housing. By introducing this intermediate structure with flexible mounting holes, vibrations are dampened before reaching the housing, significantly reducing noise transmission.
Solution Approach 2:
The elongated mounting holes in the fixing frame are designed beforehand to provide vibration absorption and shock damping capabilities. This pre-engineered cushioning feature allows the mounting structure to naturally attenuate vibrations before they can propagate through the housing, reducing noise without requiring additional active damping components.
3Ease of operation
If the user holds the lower end of the machine body far from the vibration source, then the user's hand is comfortable, but the user feels large vibration and loud noise making the device unsafe for use near the head
Solution Approach 1:
The fixing frame acts as an intermediary vibration isolation structure between the motor assembly and the housing. By reducing the overall vibration transmission through this intermediate structure, the user experiences less vibration and noise regardless of their grip position, making the device safer for use near the head while maintaining hand comfort.
Solution Approach 2:
The elongated mounting holes in the fixing frame, which initially seem to be simple structural features, actually serve as vibration dampers that convert harmful vibrations into beneficial shock absorption. This design feature transforms the potential harm of vibration transmission into a benefit by naturally attenuating vibrations before they reach the housing and user.
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 solution effectively reduces vibration and noise, enabling the percussion massager to be used in quiet environments while providing a safer and more comfortable experience for users.
Implementation Method 1
The vibration caused by the operating motor and the torque generated by the operating reciprocating assembly are counteracted and absorbed by rigidity of the fixing frame
Implementation Method 2
Damping devices are also mounted between the fixing frame and a housing to reduce the vibration and noise during the operation of the percussion massager
Data Source
AI summary
A percussion massager comprises a motor, a reciprocating assembly, a mallet, a power source, a housing, and a fixing frame. The motor, the reciprocating assembly and the power source are operably arranged in the housing. The motor comprises a main body and a first rotary shaft. Part of the mallet is not located in the housing. The first rotary shaft of the motor is operably mechanically connected with the reciprocating assembly. The reciprocating assembly is mechanically connected with the mallet. The fixing frame is installed in the housing. The main body of the motor and the reciprocating assembly are installed on the fixing frame. The main body of the motor and the reciprocating assembly are installed in the housing via the fixing frame only. When the motor is electrically connected with the power source, it rotates to drive the reciprocating assembly to reciprocate under the driving of the power source, thereby driving the mallet to make reciprocating linear motion for repeated striking.