Flexible Drive Shaft Reducer for High Amplitude Vibration
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Solution Overview
Problem
Existing adult devices for sexual pleasure lack high amplitude vibrations and aperiodic stimulation, relying on inefficient core vibratory motors that limit performance and increase manufacturing costs, while also being constrained by physical dimensions and power requirements.
Innovation Solution
A device featuring a motor with a flexible drive shaft and reduction wheel system that allows for high speed motors to operate at lower frequencies, providing higher amplitude vibrations and aperiodic stimulation, while maintaining a compact design and reducing manufacturing costs through gear reduction and asymmetric weight distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional core vibratory motors are used in adult devices, then the devices can be manufactured with simpler structures and lower costs, but the vibration amplitude is limited and manufacturing precision is insufficient
Solution Approach 1:
The motor system is segmented into distinct functional components: a high-speed motor providing rotary motion, a flexible drive shaft transmitting power, a reduction wheel system providing gear reduction, and an asymmetric annular weight creating vibration. This segmentation allows each component to be optimized independently, achieving high vibration amplitude through the asymmetric weight while using a simpler high-speed motor rather than a complex precision motor.
Solution Approach 2:
The invention transitions from direct motor-driven vibration to a multi-stage transmission system operating in different dimensional spaces. The high-speed motor operates in the rotational domain, the reduction wheels provide mechanical advantage through gear ratios, and the asymmetric weight converts rotational motion into vibratory motion in a different kinematic dimension, thereby achieving high amplitude vibration without requiring the motor itself to be complex.
2Power
If high speed motors with reduction wheel systems are used, then higher amplitude vibrations and aperiodic stimulation are achieved, but the device complexity increases
Solution Approach 1:
The transmission system incorporates dynamic elements including a flexible drive shaft that can bend and transmit torque while accommodating misalignment, and a reduction wheel system with profiles allowing multiple engagement orientations. This dynamic design allows the system to adapt to varying operational conditions and achieve high vibration power while maintaining reasonable structural simplicity through flexible rather than rigid connections.
Solution Approach 2:
The flexible drive shaft acts as an intermediary element between the high-speed motor and the reduction wheel system, transmitting rotational motion while accommodating spatial and angular misalignments. This intermediary component simplifies the overall assembly by eliminating the need for precise alignment mechanisms, thereby reducing device complexity while still enabling high power transmission for vibration generation.
3Power
If larger motors and weights are used to increase vibration amplitude, then the vibration power increases, but the device size increases
Solution Approach 1:
The invention changes key parameters of the motor system: using a high-speed motor with higher rotational speed but potentially smaller size, combined with a reduction wheel system that provides mechanical advantage. The asymmetric annular weight is designed with an optimized geometry that generates high vibration amplitude at reduced mass compared to traditional balanced weights. These parameter changes enable high vibration power in a more compact form factor.
4Power
If asymmetric annular weights are used for vibration generation, then higher amplitude vibrations are produced, but the manufacturing precision requirements increase
Solution Approach 1:
The invention deliberately employs asymmetry in the annular weight's mass distribution to generate vibration. Rather than requiring precise balancing that would eliminate vibration, the asymmetric design intentionally creates an unbalanced mass distribution that produces the desired vibratory motion when rotated. This asymmetric configuration, when combined with the reduction wheel system, achieves high vibration amplitude while the manufacturing precision requirements are managed through the overall mechanical design rather than requiring ultra-precise weight placement.
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 enables adult devices to deliver high impact vibrations across various geometries with increased efficiency and power, supporting both internal and external stimulation, and extends the operating life of the devices without increasing their size or power consumption.
Implementation Method 1
a motor providing rotary motion
Implementation Method 2
a reduction wheel mechanically in contact with the drive wheel for converting the rotary motion
Implementation Method 3
an asymmetric annular weight coupled to the reduction wheel to impart mechanical vibratory action to a user when rotated
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
Small high efficiency motors in order to produce large amounts of power must be operated such that they are running at high speed outside the desired vibration range for sexual stimulation. Accordingly, designs allowing for the appropriate gearing to allow heavy weights to be spun with small diameter and high efficiency whilst not increasing the outer diameter of an adult device are disclosed. Beneficially embodiments of the invention provide users with adult devices providing high impact (amplitude) vibration in a range of physical geometries compatible with providing internal and / or external stimulation which can also be offered at low cost and / or low manufacturing cost with extended operating life. Additionally, design flexibility via axial designs, non-axial designs, flexible drive designs, aperiodic drive designs, and linearly driven designs provide design solutions for implementing vibrators with low cost, high impact, targeted frequency characteristics, increased efficiency, and increased power.