| 摘要 |
The present invention provides a gas generator, including;a cylindrical housing having therein an ignition device chamber and a pressurized gas chamber,;a closing member in a circular shape having a fragile portion provided on one surface and closing between the chambers,;a piston being disposed inside the ignition device chamber and having a base plate and a rod that extends in the axial direction from one surface of the base plate to abut against or face the closing member,;the fragile portion being a groove formed with a curve extending from a start point A on Y1 to an end point E through a first intermediate point B on Y2, a second intermediate point C on Y1, and a third intermediate point D on Y2, where Y1 and Y2 are two straight lines drawn to be orthogonal to each other and to pass through a crossing point X2 on one surface of the closing member,;the groove formed so that distances from the crossing point X2 to the respective points satisfy the following relationship: the distance to the start point A<the distance to the first intermediate point B<the distance to the second intermediate point C<the distance to the third intermediate point D<the distance to the end point E, and that the end point E is one of points E1, E2 and E3, wherein E1 is a point crossing Y1 after passing through the third intermediate point D on Y2, E2 is a point closer to the third intermediate point D than to the crossing point E1, and E3 is a point that has passed by the crossing point E1, ;the rod being not to come in contact with the start point A but pushing at a position close to the groove between the start point A and the first intermediate point B, and thereby the closing member being ruptured along the groove from the start point A to the end point E. |
| 主权项 |
1. A gas generator, comprising:
a cylindrical housing having therein,
an ignition device chamber, which is provided with a gas discharge port and accommodates an ignition device, anda pressurized gas chamber filled with a pressurized gas, the chambers being arranged such that central axes thereof are the same axis X1; a closing member in a circular shape, closing between the ignition device chamber and the pressurized gas chamber, the closing member having a fragile portion on one surface thereof, at least an igniter and a piston, which is movable in the axis X1 direction of the cylindrical housing at the time of activation, being disposed inside the ignition device chamber, the piston having,
a base plate including a pressure-receiving surface that receives a combustion product from the ignition device, anda rod extending in an axial direction from one surface of the base plate, the rod being disposed to abut against or face the closing member, the fragile portion being a groove formed with a curve extending from a start point A on Y1 to an end point E through a first intermediate point B on Y2, a second intermediate point C on Y1, and a third intermediate point D on Y2, where Y1 and Y2 are two straight lines drawn to be orthogonal to each other and to pass through a crossing point X2 on one surface of the closing member, the groove being formed such that
distances from the crossing point X2 to the respective points satisfy the following relationship: the distance to the start point A<the distance to the first intermediate point B<the distance to the second intermediate point C<the distance to the third intermediate point D<the distance to the end point E, andthat the end point E is one of points E1, E2 and E3, wherein E1 is a point crossing Y1 after passing through the third intermediate point D on Y2, E2 is a point closer to the third intermediate point D than to the crossing point E1, and E3 is a point that has passed by the crossing point E1, by the rod moving in the axial direction and pushing the closing member at the time of activation, the closing member being ruptured along the groove from the vicinity of the start point A to the end point E of the fragile portion, and the rod being not to come in contact with the start point A but pushing the closing member at a position close to the groove between the start point A and the first intermediate point B. |
