초록 ▼

A gas generator for an air bag that can adjust gas providing amount according to circumstance is provided. The gas generator includes an outer shell vessel, an ignition unit disposed within the vessel, a gas generating material for generating a gas in response to the operation of the ignition unit,

A gas generator for an air bag that can adjust gas providing amount according to circumstance is provided. The gas generator includes an outer shell vessel, an ignition unit disposed within the vessel, a gas generating material for generating a gas in response to the operation of the ignition unit, a gas generating material accommodation chamber for accommodating the gas generating material therein, and a gas discharge chamber isolated from the gas generating material accommodation chamber by a partition member, wherein the gas discharge chamber includes a discharge port that makes the inside of the gas discharge chamber communicate with the atmosphere, and a gas discharge unit which is operated upon receiving an operating signal, for rupturing the partition member to discharge the gas.

대표청구항 ▼

1. A gas generator for an air bag, comprising: an outer shell vessel having a pressurized gas accommodating chamber for storing a gas therein, and a diffuser nozzle provided at a first opening provided in said outer shell vessel, said first opening being covered by a rupturable partition wall, sa

1. A gas generator for an air bag, comprising: an outer shell vessel having a pressurized gas accommodating chamber for storing a gas therein, and a diffuser nozzle provided at a first opening provided in said outer shell vessel, said first opening being covered by a rupturable partition wall, said diffuser nozzle having gas discharge ports in communication with the air bag; an ignition unit disposed within said outer shell vessel and operates upon receiving an operation signal; gas generating means disposed within said outer shell vessel for generating gas when said ignition unit operates; a partition member covering a second opening provided in said outer shell vessel; a gas discharge chamber disposed over said partition member, said gas discharge chamber having a gas discharge port which communicates the inside of the chamber with an atmosphere outside the chamber; and a gas discharging unit which activates upon receiving another operation signal, said gas discharging unit breaking said partition member to discharge the gas from said outer shell vessel to the atmosphere through said gas discharge chamber, said gas discharging unit including a non-hollow piston member having a first flat tip facing said partition member and a second flat tip facing a pyrotechnic vessel that projects the piston member towards said partition member to break said partition member by the first flat tip. 2. A gas generator for an air bag as claimed in claim 1, wherein said partition member is formed of a rupturable gas sealing plate. 3. A gas generator for an air bag as claimed in claim 1, wherein said gas generating means consists mainly of any one of a solid gas generating agent, a pressurized gas, and a liquid, which is gasified by heating. 4. A gas generator for an air bag as claimed in claim 1, wherein said gas discharging unit includes an electric ignition unit that ignites pyrotechnic material provided in said pyrotechnic vessel. 5. A gas generator for an air bag, comprising: an outer shell vessel having a pressurized gas accommodating chamber for storing a gas therein, and a diffuser nozzle provided at a first opening provided in said outer shell vessel, said first opening being covered by a rupturable partition wall, said diffuser nozzle having gas discharge ports in communication with the air bag; ignition means disposed within said outer shell vessel and operates upon receiving an operation signal; gas generating means disposed within said outer shell vessel for generating gas when said ignition means operates; a partition member having a gas discharge port which communicates the inside of the partition member with an atmosphere outside the partition member; and gas discharging means including, a cylindrical rupturable tube-shaped body having a conduit therein and protruding into said partition member, a first end of said conduit being in fluid communication with inside of said outer shell vessel, and a second end of said conduit being closed, said tube-shaped body being formed with a brittle portion that breaks a portion of said tube-shaped body to discharge the gas from said outer shell vessel to the atmosphere through a broken portion of said tube-shaped body, and a piston member and a pyrotechnic vessel that projects the piston member towards said brittle portion to break said tube-shaped body. 6. A gas generator for an air big as claimed in claim 5, wherein said gas generating means consists mainly of any one of a solid gas generating agent, a pressurized gas, and a liquid, which is gasified by heating. 7. A gas generating for an air bag as claimed in claim 5, wherein said gas discharging means includes an electric ignition unit that ignites pyrotechnic material provided in said pyrotechnic vessel.