| 摘要 |
The present invention provides an actuator including:
a cylinder connected to an ignition device;
a piston slidably accommodated inside the cylinder, the piston having, in a desired section in the length direction, an enlarged diameter portion in which an outer diameter is enlarged;
a cylindrical stopper attached to an inner peripheral surface of the cylinder, the stopper including,
a main body portion which is fixed to the inner peripheral surface of the cylinder, and
a nail portion which inwardly projects from the main body portion and is formed of an elastic material, wherein
before activation of the ignition device, the piston is inhibited from moving in an axial direction by causing the nail portion to contact a part of the enlarged diameter portion,
after activation of the ignition device, the piston is inhibited from moving in a backward direction by causing the nail portion to contact another part of the enlarged diameter portion. |
