Flying vehicle current interruption device

Patent metadata

Field	Value
Publication number	US-11244797-B2
Application number	US-201917054523-A
Country	US
Kind code	B2
Filing date	Apr 23, 2019
Priority date	May 11, 2018
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

Provided is a current breaker for an aerial vehicle that can prevent occurrence of a minor collision of propellers or other components in operation with a person and can prevent occurrence of a deployment failure of a lift generating member at a crash of the aerial vehicle. A current breaker 100 for an aerial vehicle includes a rupture plate 23 that disconnects a current supply path 30 that electrically connects an electric device and an electric circuit, an igniter 10 that damages the rupture plate 23 by directly or indirectly applying a destructive force (heat and pressure) toward the current supply path 30 with respect to the rupture plate 23, and disconnects the current supply path 30 by the rupture plate 23 that has been damaged, and a controller 24 that drives the igniter 10 upon detection of an abnormality.

First claim

The invention claimed is:

1. A current breaker for an aerial vehicle that is used for an aerial vehicle provided with an electric device and an electric circuit having a current supply source that supplies a current to the electric device, and blocks a current supply from the current supply source to the electric device upon detection of an abnormality of the aerial vehicle, the current breaker for an aerial vehicle comprising:
a rupture plate that disconnects a current supply path that electrically connects the electric device and the electric circuit;
a rupture force source that damages the rupture plate by directly or indirectly applying a rupture force to the rupture plate in a direction toward the current supply path, and disconnects the current supply path by the rupture plate that has been damaged; and
a controller that drives the rupture force source upon detection of the abnormality;
a cup provided between the rupture force source and the rupture plate, disposed so as to cover at least a part of the rupture force source that applies the rupture force, and having a bottom,

wherein the bottom of the cup is formed into a conical shape so as to be recessed inside, and is displaced toward the rupture plate by receiving the rupture force to transmit the rupture force to the rupture plate.

2. The current breaker for an aerial vehicle according to claim 1 , wherein the rupture plate is provided with one or more fragile parts.

3. The current breaker for an aerial vehicle according to claim 2 , wherein
the rupture plate is provided such that a central position of the rupture plate substantially coincides with a central axis of the rupture force source, and has a width larger than a width of the rupture force source in a length direction of the current supply path, and
the fragile parts of the rupture plate are disposed at an eccentric position of the rupture plate.

4. The current breaker for an aerial vehicle according to claim 2 , further comprising a cylinder provided between the rupture force source and the rupture plate, disposed so as to cover at least a part of the rupture force source that applies the rupture force, and having a bottom, wherein the one or more fragile parts are provided on the bottom of the cylinder.

5. The current breaker for an aerial vehicle according to claim 2 , further comprising a cylinder provided between the rupture force source and the rupture plate, disposed so as to cover at least a part of the rupture force source that applies the rupture force, and having an opening at a tip of the cylinder,
wherein the one or more fragile parts are provided on a bottom of the cylinder.

6. The current breaker for an aerial vehicle according to claim 1 , wherein an insulating material is provided between the rupture plate and the current supply path.

7. The current breaker for an aerial vehicle according to claim 6 , wherein the insulating material is held on a lower surface of the rupture plate.

8. The current breaker for an aerial vehicle according to claim 1 , wherein the rupture force source is an igniter.

Assignees

• Nippon Kayaku Kk

Inventors

• To Takahiro
• Sasamoto Koichi

Classifications

• B64U50/19

  using electrically powered motors · CPC title

• Y02T50/60

  Efficient propulsion technologies, e.g. for aircraft · CPC title

• H01H39/006

  Opening by severing a conductor · CPC title

• H01H39/00 Primary

  Switching devices actuated by an explosion produced within the device and initiated by an electric current · CPC title

• B64D2221/00

  Electric power distribution systems onboard aircraft · CPC title