Hollow Pipe Joint Structure for Sewing Machine Vibration

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Solution Overview

Problem

Soldering of small-diameter hollow pipes in sewing machines is laborious, prone to gas leakage, and requires frequent maintenance due to vibration-induced solder failure.

Innovation Solution

A hollow pipe joint structure using elastic members to securely connect hollow pipes, ensuring airtight seals and reduced maintenance needs by using stepped surfaces and elastic sections to snugly fit the pipes together.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If soldering method is used to joint hollow pipes, then connection strength is improved, but assembly time increases and gas leakage risk increases

Engineering Contradiction:

Improveconnection strengthVSAvoidassembly time

Core Design Contradiction:

StrengthVSLoss of time

Solution Approach 1:

The patent replaces the thermal soldering process with a mechanical connection system consisting of a connecting piece and elastic member. The elastic member provides continuous mechanical pressure to maintain the joint, eliminating the need for thermal soldering while achieving both strong connection and rapid assembly.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a connecting piece as an intermediary component between the two hollow pipes. This connecting piece serves as a mediator that facilitates the connection, allowing for quick assembly without direct soldering between pipes while maintaining connection strength.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Strength

If soldering method is used to joint hollow pipes, then connection strength is improved, but reliability decreases due to solder failure from vibration

Engineering Contradiction:

Improveconnection strengthVSAvoidjoint reliability

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The patent employs an elastic member that provides dynamic adaptation to vibration and movement. The elastic material can deform and recover, continuously maintaining connection pressure despite high-frequency vibrations, thereby preventing solder failure while preserving connection strength.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent replaces the brittle solder joint with a flexible mechanical connection system. The elastic member provides continuous mechanical pressure that can accommodate vibration and movement, eliminating the reliability issues associated with solder joint failure under vibrational stress.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If soldering method is used to joint hollow pipes, then airtight seal is achieved, but manufacturing complexity increases

Engineering Contradiction:

Improveairtight sealVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent introduces a connecting piece as an intermediary that integrates multiple functions: mechanical connection, sealing surface provision, and elastic member mounting. This intermediary component simplifies manufacturing by consolidating functions that would otherwise require complex soldering and sealing procedures.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the complex thermal soldering and sealing process with a simpler mechanical assembly process. The connecting piece with integrated sealing surfaces and the elastic member provide both airtight sealing and structural connection through straightforward mechanical assembly, reducing manufacturing complexity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

Facilitates easier and quicker assembly of hollow pipes, prevents gas leakage, and maintains structural integrity with reduced maintenance requirements.

Implementation Method 1

an elastic member sleeved onto the first hollow pipe and the second hollow pipe to elastically squeeze against the first outer surface and the second outer surface

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

elastically squeeze against the first outer surface and the second outer surface, so that the first and second hollow pipes are elastically positioned against each other

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS10801144B2Hollow pipe joint structure for a sewing machine

Publication Date: 2020.10.13 TSANG YU IND

AI summary

A hollow pipe joint structure for a sewing machine includes a first hollow pipe, a second hollow pipe and an elastic member. The elastic member is sleeved onto the first hollow pipe and the second hollow pipe, and elastically squeezes against the first outer surface and the second outer surface of the first and second hollow pipes, respectively, to pull the first and second hollow pipes against each other, which makes assembly of the hollow pipes easier, quicker and no frequent maintenance is required.