Variable-Amplitude Percussive Massage Assembly for Adjustable Stroke
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Solution Overview
Problem
Percussive massage devices typically only offer a single reciprocating amplitude, limiting their ability to provide different levels or types of massage, as varying amplitudes can affect the intensity and effectiveness of the massage experience.
Innovation Solution
A percussive therapy device with a variable amplitude assembly, featuring an eccentric weight member and a movable member that adjusts the reciprocating motion of the push rod assembly based on the direction of rotation, allowing the amplitude to be user-adjusted between different ranges, enabling a longer or shorter stroke depending on user needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single reciprocating amplitude is used in percussive massage devices, then the device structure is simple, but the massage versatility is limited
Solution Approach 1:
The patent implements a movable member that can shift between different positions to dynamically change the reciprocating amplitude of the push rod assembly. This dynamic adjustment mechanism allows the device to provide multiple massage intensities and stroke lengths, resolving the contradiction between maintaining simple structure and achieving massage versatility.
Solution Approach 2:
The patent changes the amplitude parameter of the reciprocating motion by allowing the movable member to occupy different positions along the push rod assembly. By adjusting the position of the movable member, the device can vary the stroke length and massage intensity, thereby achieving multiple massage effects without requiring multiple complete devices.
2Ease of operation
If a variable amplitude assembly with movable member is added, then the massage customization is improved, but the device complexity increases
Solution Approach 1:
The variable amplitude assembly is segmented into distinct functional components: the movable member, the push rod assembly, and the eccentric weight member. This segmentation allows each component to perform its specific function independently while working together to achieve amplitude variation, making the complex assembly more manageable and easier to operate.
Solution Approach 2:
The movable member acts as an intermediary element between the eccentric weight member and the push rod assembly. It transfers and modulates the reciprocating motion, allowing users to adjust amplitude by positioning the movable member at different locations, thereby simplifying the operation of the variable amplitude mechanism.
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 device provides a customizable massage experience by varying the amplitude, allowing users to adjust the stroke length, enhancing the versatility and effectiveness of the massage therapy by accommodating different user preferences and applications.
Implementation Method 1
The variable amplitude assembly includes an eccentric weight member that is rotated by the motor. The centrifugal force generated by the rotating eccentric weight member drives the reciprocating motion of the push rod assembly, and by changing the rotation direction, the amplitude can be varied between different ranges.
Data Source
AI summary
A percussive therapy device that includes a housing, an electrical source, a motor positioned in the housing, a switch for activating the motor, a push rod assembly operatively connected to the motor and configured to provide reciprocating motion in response to activation of the motor, and a massage attachment secured to a distal end of the push rod assembly. The reciprocating motion of the push rod assembly has a user-adjustable amplitude.