Elastic Piston Support Member for Shock-Absorbing Airless Dispenser

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Solution Overview

Problem

Airless type dispensers are prone to damage from external shocks and separation of housing components due to volume expansion of contents at low temperatures, leading to potential damage to the pumping member.

Innovation Solution

A shock-absorbing lower structure featuring a support member made of elastic material, such as metal or soft synthetic resin, is installed on the piston to provide cushioning and prevent separation of the housing support from the dispenser housing, while also absorbing the shock caused by volume expansion of contents.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a synthetic resin housing is used in an airless type dispenser, then the dispenser becomes light-weighted, inexpensive to manufacture, and easy to mold, but it is easily broken by external shock and the housing support may be separated from the housing when the piston is lowered by external force

Engineering Contradiction:

Improvemanufacturing cost and ease of moldingVSAvoidresistance to external shock

Core Design Contradiction:

Ease of manufactureVSStrength

Solution Approach 1:

A buffer part is provided at the lower part of the piston to maintain a predetermined distance between the piston and housing support. This buffer part absorbs external shocks before they can transmit force to the housing support, preventing separation of the housing support from the housing while preserving the advantages of synthetic resin material

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The buffer part changes the physical state of the system by introducing a variable distance parameter between the piston and housing support. This distance parameter allows the system to absorb shocks dynamically while maintaining structural integrity of the synthetic resin housing

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the airless type dispenser is filled with contents and maintained at low temperature, then the contents may be frozen and expand in volume, pressurizing the housing support and resulting in separation of the housing support from the housing

Engineering Contradiction:

Improvestorage stability at low temperatureVSAvoidvolume expansion of frozen contents

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The buffer part positioned at the lower part of the piston provides preemptive cushioning against volume expansion of frozen contents. By maintaining a predetermined distance from the housing support, the buffer part absorbs expansion pressure before it can cause separation of the housing support from the housing

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The buffer part acts as an intermediary element between the piston and housing support. This intermediary absorbs and distributes the pressure from volume expansion of contents, preventing direct transmission of force that would cause housing support separation

Inventive Principle:

Principle #24Intermediary (Mediator)

3Device complexity

If no buffer part is provided, then the structure is simple, but the piston directly contacts the housing support causing separation during shock or volume expansion

Engineering Contradiction:

Improvestructural simplicityVSAvoidprevention of housing support separation

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The buffer part provides beforehand cushioning by maintaining a predetermined distance between the piston and housing support. This simple yet effective design prevents direct contact during shock or volume expansion events, ensuring reliability without adding complex mechanisms

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 prevents the separation of housing components and protects the pumping member from damage during external shocks and low-temperature volume expansion, ensuring the integrity and functionality of the airless type dispenser.

Implementation Method 1

a support member made of elastic material is arranged in a lower part of a piston to provide a cushioning function

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

when contents expands in volume at a low temperature, not only is the housing support or a pumping member prevented from being separated, but also the pumping member is prevented from being damaged

Methodology Applied

Scientific EffectShock absorption: Damping

Data Source

PatentEP2881338B1Shock-absorbing lower structure of an airless type dispenser

Publication Date: 2019.02.13 YONWOO CO LTD

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AI summary

The present invention relates to a shock-absorbing lower structure of an airless type dispenser, wherein a support member made of elastic material is arranged in a lower part of a piston to provide a cushioning function so as to support the lower end of the piston in the housing of the dispenser. Thus, when the piston descends and presses a housing support by the shock applied from an external source, the housing support is prevented from being separated from the housing of the dispenser. Furthermore, when contents expands in volume at a low temperature, not only is a housing support or a pumping member prevented from being separated, but also the pumping member is prevented from being damaged.