Parachute Ejection Mechanism Secure Retention
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Solution Overview
Problem
The existing parachute deployment device for multi-rotor rotary wing aircraft lacks a secure mechanism to fix the projectile to the ejection stand, leading to potential misalignment or ejection failure when the aircraft is inclined or upside down, which can result in the projectile not being properly ejected when needed.
Innovation Solution
A parachute device that includes a flying body connected to a parachute and a gas generating device, with an ejection section that holds the flying body and a lead wire to ignite the gas generating device, where the flying body main body is engaged with the ejection section and the lead wire is led out in a different direction from the ejection path, ensuring secure engagement and preventing the flying body from falling out.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the projectile is only inserted through the hollow tube without a holding mechanism, then the device complexity is reduced, but the reliability of projectile ejection deteriorates when the aircraft is inclined or upside down
Solution Approach 1:
The flying body main body section is preliminarily engaged with the ejection section through a fitting structure before ejection. This preliminary engagement ensures the flying body remains in the correct position even when the aircraft is inclined or upside down, preventing it from falling out before the intended ejection moment.
Solution Approach 2:
The internal space defined by the ejection section and flying body main body section acts as an intermediary structure. This space accommodates the gas generating device and provides a confined environment that ensures proper positioning and engagement of the flying body with the ejection section.
2Reliability
If a holding mechanism such as a shear pin is used to fix the projectile to the ejection stand, then the projectile ejection reliability is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The ejection section and flying body main body section are merged into an integrated structure where the flying body is engaged with the ejection section. This merging eliminates the need for separate holding mechanisms like shear pins, as the engagement structure itself provides the necessary retention and ejection functionality.
Solution Approach 2:
The ejection section serves multiple functions: it holds the flying body in position, provides the ejection force through gas generation, and guides the flying body during ejection. This multi-functionality reduces the need for additional specialized components.
3Device complexity
If the lead wire is led out in the ejection direction, then the device complexity is reduced, but the flying body may fall out or misalign when the aircraft is inclined
Solution Approach 1:
The lead wire is led out in a different direction from the ejection direction, creating a localized differentiation in wire routing. This local quality change ensures that the lead wire does not interfere with the ejection path and maintains proper flying body positioning even when the aircraft is inclined or upside down.
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 effectively prevents the flying body from falling out of the parachute device and ensures reliable ejection and parachute deployment, enhancing safety by maintaining the flying body's position and ensuring proper parachute opening even in adverse orientations.
Implementation Method 1
a gas generating device configured to generate gas
Implementation Method 2
the gas generating device is disposed in an internal space defined by the ejection section and the flying body main body section
Implementation Method 3
a lead wire configured to ignite the gas generating device
Data Source
AI summary
A parachute device includes a parachute, a parachute accommodation section configured to accommodate the parachute, at least one flying body including a flying body main body section connected to the parachute, and a gas generating device configured to generate gas. The parachute device further includes an ejection section configured to eject the flying body, and a lead wire configured to ignite the gas generating device. The flying body main body section is engaged with the ejection section, the gas generating device is disposed in an internal space defined by the ejection section and the flying body main body section, and the lead wire is led out from the internal space in a different direction from an ejection direction of the flying body in a state with one end connected to the gas generating device.