1. An air bag system comprising:
an air bag accommodated within an accommodating portion; and
an opening and closing control unit of a discharge port disposed on the accommodating portion, wherein
the air bag includes a bag main body having an inlet opening, a discharge portion having the discharge port, and a connecting member disposed within the bag main body such that a first end thereof is connected to the discharge portion and a second end thereof is connected to the opening and closing control unit,
the air bag is inflated by introducing a gas into an interior of the air bag through the inlet opening and discharges a part of the gas by opening the discharge port;
the bag main body is formed by joining circumferential edges of a plurality of main body base sheets to each other,
the discharge portion includes a pair of extended portions extended from the main body base sheets, the extended including respective tip ends and foot portions located separately from the tip ends, the extended portions are connected to the first end of the connecting member, and a slit for forming the discharge port is located at the foot portions of the respective extended portions, and is formed as a non-joined portion along a seaming line joining the circumferential edges of the main body base sheets,
when the air bag is accommodated in the accommodating portion, the extended portions are superposed and accommodated in the interior of the air bag, and
when the air bag is inflated, the slit for the discharge port is closed by maintaining the second end of the connecting member to be connected to the opening and closing control unit, and subsequently, at least a part of the discharge portion protrudes to an exterior of the air bag to thereby cause the slit to be opened to form the discharge port, by releasing connection of the second end of the connecting member to the opening and control unit to cancel a drawing tension of the connecting member to the discharge portion in the interior of the air bag.
2. An air bag system according to claim 1, wherein when the air bag is inflated with the connection of the connecting member to the opening and closing control unit maintained, the extended portions forming the slit on the foot portion sides thereof are brought into pressure contact with each other by virtue of an internal pressure produced within the air bag by the gas introduced thereinto so as to maintain the discharge port closed.
3. An air bag system according to claim 1, wherein when the air bag has completed its inflation with the discharge portion closed, portions of the main body base sheets making up the bag main body which lie in the vicinity of the discharge portion are disposed in an area which is formed into a shape of curved surface which protrudes towards an outer circumference of an inflated shape defined in a direction which intersects a straight line connecting the seaming line substantially at right angles.
4. An air bag system according to claim 1, wherein one connecting member is provided so that the tip ends of the two extended portions are both connected thereto.
5. An air bag system as set forth in claim 1, wherein two connecting members are provided so that the tip ends of the two extended portions are connected thereto, respectively.
6. An air bag system as set forth in claim 1, wherein the air bag is used in an air bag system for a steering wheel.
7. An air bag system as set forth in claim 1, wherein the air bag is used in a front seat passenger air bag.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A claw-pole type stepping motor comprising:
a rotor assembly shaped substantially cylindrical, and having a center shaft; and
a stator assembly composed of two cup-shaped stator units which are coupled to each other coaxially so as to axially sandwich the rotor assembly, and which each include: a bobbin having a magnet wire wound therearound for excitation; two pole tooth arrays magnetically connected to each other and shifted in phase from each other by an electrical angle of 180 degrees; and a cover ring to protect the magnet wire wound around the bobbin against resin injected when the stator unit is resin-molded for an integrated solid structure.
2. A claw-pole type stepping motor according to claim 1, wherein the bobbin includes two flanges, the magnet wire is wound between the two flanges, and the cover ring is in contact with the two flanges such that the cover ring touches an outer circumference of at least one of the two flanges so as to protect the magnet wire wound between the two flanges against the resin injected.
3. A claw-pole type stepping motor according to claim 1, wherein the bobbin includes a terminal block provided with terminals to conduct supply current to the magnet wire, and the cover ring includes a guide block which is at least partly in touch with the terminal block so as to protect end portions of the magnet wire leading out to the terminals against the resin injected.
4. A claw-pole type stepping motor according to claim 3, wherein the guide block of the cover ring has a groove which allows the magnet wire to lead out to the terminals.