Parachute Ejection Support Structure for Vibration-Stable Deployment

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing safety apparatuses face issues with ejected objects like parachutes becoming displaced during transportation due to vibrations, leading to delayed deployment and potential operational failures.

Innovation Solution

Incorporation of a movement preventing member fixed to the push-up member, which is made of resin or composite materials, to prevent the ejected object from moving in the circumferential direction, combined with a power source to maintain the initial state and facilitate smooth ejection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the ejected object is placed on the flange of the push-up member, then the ejected object can be supported and ejected, but the ejected object may be displaced in the circumferential direction due to vibration during transportation

Engineering Contradiction:

Improvedeployment reliabilityVSAvoidposition stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The movement preventing member is installed in advance on the flange to counteract the potential circumferential displacement of the ejected object during transportation. This preliminary protective measure prevents the harmful effect before it occurs, ensuring the ejected object maintains its initial position and deployment readiness.

Inventive Principle:

Principle #9Preliminary anti-action

2Stability of the object's composition

If a movement preventing member is added to prevent circumferential displacement, then the ejected object remains stable, but the device complexity increases

Engineering Contradiction:

Improveposition stabilityVSAvoidstructure complexity

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

Instead of making the entire push-up member complex, the movement preventing member is added locally only where needed - on the flange surface. This localized addition provides the necessary positional stability without requiring complex modifications to the entire device structure.

Inventive Principle:

Principle #3Local quality

3Weight of moving object

If the push-up member is made of resin or composite material, then the weight is reduced, but the strength may be insufficient to prevent displacement

Engineering Contradiction:

Improvepush-up member weightVSAvoidstructural strength

Core Design Contradiction:

Weight of moving objectVSStrength

Solution Approach 1:

The push-up member is constructed using composite materials that combine resin with reinforcing fibers or structures. This composite construction provides sufficient structural strength to prevent circumferential displacement while maintaining the weight advantage of resin-based materials compared to solid metal construction.

Inventive Principle:

Principle #40Composite materials

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 ensures the ejected object remains stable during transportation, allowing for timely and efficient deployment, while reducing the weight and size of the power source components.

Implementation Method 1

a gas generator for moving the piston member within the cylinder

Methodology Applied

Scientific EffectGas generation through combustion: Combustion

Implementation Method 2

high-temperature high-pressure gas... moves the piston member

Methodology Applied

Scientific EffectPressure force from generated gas: Pressure Gradient

Implementation Method 3

the piston member is moved in the cylinder by the gas generator... the push-up member being pushed up in one direction by the piston member

Methodology Applied

Scientific EffectThermal to mechanical energy conversion:

Implementation Method 4

an ejected object pushed up while being supported by the push-up member... ejection speed of an ejected object

Methodology Applied

Scientific EffectMechanical acceleration:

Data Source

PatentEP4129823B1Safety device, and flying vehicle provided with safety device

Publication Date: 2025.12.03 NIPPON KAYAKU CO LTD

Figure 1
Figure 2~3
Figure 4(a)~4(e)

AI summary

There is provided a safety apparatus including a push-up member in which an ejected object is hardly displaced even during transportation, and an aerial vehicle including the safety apparatus. A safety apparatus 100 includes a cylinder 14 that accommodates a piston member 10 and is provided with a bore 13 through which the piston member 10 protrudes to the outside (upward in FIG. 1) during operation, a push-up member 15 that is pushed up in one direction by the piston member 10, an ejected object 16 that is pushed up while being supported by the push-up member 15, a gas generator 17 as a power source that moves the piston member 10 in the cylinder 14, a container 18 that has a bottomed cylindrical shape and accommodates the piston member 10, the cylinder 14, the push-up member 15, the ejected object 16, and the gas generator 17, and a lid 21 that closes an opening end of the container 18. A movement preventing member 27 that prevents the ejected object 16 from moving in a circumferential direction of a bottomed cylindrical portion 19 is provided on an upper surface of a support 20 of the push-up member 15.