External Sliding Ejection Device for Parachute Weight Reduction

Solution Overview

Problem

Existing parachute ejection devices for flying objects face challenges in reducing the weight of the ejection system without compromising the ejection speed, as conventional designs require space for a piston, increasing the container size and weight.

Innovation Solution

The ejection device incorporates a sliding member and a push-up member with a flange-like portion that projects outward, allowing the ejected object to be supported and ejected without the need for a large container, thereby reducing weight while maintaining ejection speed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If a piston is used to push up the parachute, then the ejection speed can be maintained, but the container size and weight increase

Engineering Contradiction:

Improveejection speedVSAvoidcontainer weight

Core Design Contradiction:

SpeedVSWeight of stationary object

Solution Approach 1:

The patent extracts the piston from the container by using an external sliding member that moves along the outer surface of the container. The sliding member is driven by a power source mounted on the container, allowing the parachute to be ejected without requiring internal piston space, thereby reducing container weight while maintaining ejection speed.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention transitions from a traditional internal linear piston mechanism to an external sliding mechanism that operates in a different spatial dimension. The sliding member moves along the container's outer surface rather than inside it, fundamentally changing the spatial arrangement and eliminating the need for internal accommodation space.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Speed

If a piston is used to push up the parachute, then the ejection speed can be maintained, but the container size increases

Engineering Contradiction:

Improveejection speedVSAvoidcontainer volume

Core Design Contradiction:

SpeedVSVolume of stationary object

Solution Approach 1:

The patent extracts the piston from the container by using an external sliding member that moves along the outer surface of the container. The sliding member is driven by a power source mounted on the container, allowing the parachute to be ejected without requiring internal piston space, thereby reducing container weight while maintaining ejection speed.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention transitions from a traditional internal linear piston mechanism to an external sliding mechanism that operates in a different spatial dimension. The sliding member moves along the container's outer surface rather than inside it, fundamentally changing the spatial arrangement and eliminating the need for internal accommodation space.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Weight of stationary object

If the container size is reduced, then the weight is reduced, but the ejection speed may be compromised

Engineering Contradiction:

Improvecontainer weightVSAvoidejection speed

Core Design Contradiction:

Weight of stationary objectVSSpeed

Solution Approach 1:

The patent introduces a flange-like portion as an intermediary component that connects the sliding member to the parachute. This flange structure provides an effective pushing surface that transfers the ejection force efficiently, ensuring that the reduced container size does not compromise the ejection speed through the use of this intermediate mechanical element.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention replaces the traditional internal piston-cylinder mechanical system with an external sliding member driven by a power source. This substitution eliminates the need for large internal spaces while maintaining the mechanical force required for high-speed ejection through external actuation.

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

This configuration allows for a compact design that reduces the overall weight of the ejection device without sacrificing ejection speed, enhancing safety by minimizing the risk of falling accidents for flying objects.

Implementation Method 1

a power source that moves the sliding member in the cylinder such that the sliding member projects outward from the inside

Methodology Applied

Scientific EffectPower source mechanical drive: Mechanical Force

Data Source

PatentUS11731769B2Ejection device and flying body provided with ejection device

Publication Date: 2023.08.22 NIPPON KAYAKU CO LTD

AI summary

Provided are an ejection device with reduced weight without reducing an ejection speed of an ejected object and a flying object including the ejection device. An ejection device 100 includes a piston member 10, a cylinder 14 which accommodates the piston member 10 and is provided with a hole portion 13 for allowing the piston member 10 to project outward during operation, a push-up member 15 pushed up in one direction by the piston member 10, an ejected object 16 pushed up while being supported by the push-up member 15, and a gas generator 17 which moves the piston member 10 in the cylinder 14, and in the ejection device 100, the push-up member 15 has a support portion 20 disposed on a distal end side of the piston member 10 with a tip of the piston member 10 in a moving direction of the piston member 10 set as a reference.