Variable-Inner-Diameter Massage Sleeve for Stepless Pressure Adjustment

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Solution Overview

Problem

Existing massage structures with fixed or imprecisely adjustable inner diameters fail to adapt to varying user body parts, leading to uneven pressure distribution, discomfort, and reduced effectiveness.

Innovation Solution

A massage structure with a variable inner diameter, utilizing a deformation assembly and rotating sleeve that converts rotational motion into linear reciprocating motion, enabling stepless adjustment through threaded engagement and guided motion, ensuring uniform pressure distribution and stable support.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a fixed encircling inner diameter is used in massage structures, then the structure is simple and stable, but it cannot adapt to varying circumferences of different users or different body parts, resulting in uneven distribution of massage pressure and reduced comfort

Engineering Contradiction:
Improveadaptability to varying circumferencesVSAvoidstructure complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The massage structure employs a dynamic inner diameter that can be adjusted during use. The deformation assembly includes a deformable section that can change its circumferential dimension, transforming a static structure into a dynamic one that adapts to different body parts and user preferences, thereby resolving the contradiction between simplicity and adaptability.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The inner diameter parameter of the massage structure is made variable through the deformation assembly. By changing the circumferential dimension of the deformable section, the structure can accommodate different body circumferences and provide customized massage pressure, addressing the adaptability requirement without significantly increasing overall structural complexity.

Inventive Principle:
Principle #35Parameter changes

2Measurement precision

If airbag inflation/deflation is used for adjustment, then the inner diameter can be changed, but the pressure control is imprecise, response is slow, and noise is generated

Engineering Contradiction:
Improvepressure control precisionVSAvoidadjustment response time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The patent replaces the pneumatic airbag system with a mechanical deformation assembly. This mechanical system provides direct, precise control over the inner diameter adjustment through physical deformation of the deformable section, eliminating the delays and imprecision associated with airbag inflation/deflation while reducing noise.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If mechanical detent adjustment is used, then the inner diameter can be adjusted, but the adjustment is step-wise and cannot achieve stepless adjustment, resulting in poor user experience

Engineering Contradiction:
Improvesmoothness of adjustmentVSAvoidadjustment mechanism complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The deformation assembly enables continuous, stepless adjustment of the inner diameter through progressive deformation of the deformable section. This dynamic adjustment mechanism eliminates the stepped nature of detent systems, providing smooth transitions and improved user experience without requiring complex multi-component adjustment mechanisms.

Inventive Principle:
Principle #15Dynamics

4Adaptability or versatility

If elastic sleeves or flexible support members are used to achieve inner diameter changes, then the structure can deform, but they lack effective support and guidance during deformation, causing irregular deformation and potential structural distortion

Engineering Contradiction:
Improvedeformation capabilityVSAvoidstructural stability during deformation
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The massage structure incorporates a localized deformable section with specific structural characteristics designed for controlled deformation. This deformable section is positioned and configured to deform in a predetermined manner, providing reliable support and guidance during the deformation process while maintaining overall structural integrity, thus resolving the contradiction between deformation capability and structural stability.

Inventive Principle:
Principle #3Local quality

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

Enables precise, stepless adjustment of inner diameter for personalized massage pressure, enhancing comfort and effectiveness while protecting the structure from deformation and prolonging its service life.

Implementation Method 1

the first engaging portion and the second engaging portion have threaded structures engaged with each other; and during coupling linkage, the rotating sleeve rotates, and drives the first engaging portion to perform a linear reciprocating motion along the axis L1 through threaded transmission

Methodology Applied
Scientific EffectThreaded transmission: Screw

Data Source

PatentUS12599537B1Massage structure with variable inner diameter
Publication Date: 2026.04.14 DONGGUAN YANSHI ELECTRONIC TECHNOLOGY CO LTD
  • US12599537B1 patent drawing
  • US12599537B1 patent drawing
  • US12599537B1 patent drawing

AI summary

A massage structure with a variable inner diameter includes a deformation assembly and a rotating sleeve, where the deformation assembly is sleeved outside a first massage area; the deformation assembly includes a deformation portion, a constraint portion, and a first engaging portion, where the constraint portion and the first engaging portion are respectively disposed at both ends of the deformation portion along a central axis L1 of the deformation assembly, and the constraint portion is configured to limit the movement of the deformation portion; the rotating sleeve is provided with a second engaging portion; the first engaging portion and the second engaging portion are linked in a coupled manner, and the first engaging portion moves closer to or away from the constraint portion along the axis L1, which drives at least a portion of the deformation portion to deform toward or away from the first massage area.