| 摘要 |
PURPOSE: A rocket ignition is carried out when the rocket reached a certain distance by an injection device of the rocket to prevent damage of injection device by back draft. CONSTITUTION: A rocket ignition safety device comprises a body(1), an electrical delaying member, a driving member, a mechanical delaying member, a first limiting member, a second limiting member. The body is attached inside of the body and has a space inside. The electrical delaying member is installed in side of the body to delay ignition of the rocket. The driving member is installed in the same shaft of the rotation shaft of the rocket to drive the electrical delaying member by the rotation. The mechanical delaying member is installed inside of the body to delay the driving of the driving member mechanically. The first limiting member is installed inside of the body to limit driving of the driving member when the rocket is in launching chamber. The second limiting member is installed in the body to limit the driving of the driving member for a certain time.
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