Abstract: A mechanism for covering a casing accommodating an air bag therein is formed of a lid for covering the casing, mounting pieces protruding from a back surface of the lid for mounting the lid to the casing, and high strength portions. First and second tear lines are formed in the back surface of the lid to allow the lid to be torn along the first and second tear lines. The first tear line extends in the width direction of a vehicle, and the second tear lines intersect the first tear line. The high strength portions are disposed outside the second tear lines near the respective connecting corners between the first tear line and the second tear line. The high strength portions are ribs, which are disposed on the back surface of the lid and project such that the second tear lines extend along the ribs. The ribs continue from the mounting pieces to thereby prevent a tear, which has traveled along the first tear line, from further traveling sideways at the connecting corners.

Abstract: An air bag consists of a front panel and rear panel. An inflater mounting opening is provided at the central portion of the rear panel. The rear panel and the front panel are connected to each other at a vicinity of the center thereof by threads. The threads allow the air bag to extend sideward at first, and then the threads are chopped so as to allow the air bag to extend forward.

Abstract: Adapter members are projected from the inner surface of a cover member and tear lines including a first tear line which extends in the transverse direction of the cover member and second tear lines which extend in the longitudinal direction thereof are provided. The second tear lines are disposed at a short distance away from the adapter members. The thickness of portions of the cover member outside the second tear lines is smaller than that of the adapter members. The thickness of a portion of the cover member between the second tear lines is smaller than that of the portions of the cover member outside the second tear lines. Therefore, the tearing operation proceeding along the first tear line changes the course at the intersecting portions with certainty, and proceeds to the second tear lines. Thus, the module cover is torn open exactly along the tear line.

Abstract: An inflator is formed of a container packed with gas generating agents, a device for initiating the gas generating reaction of the gas generating agents, injection holes provided in one surface of the container so as to inject the gas generated in the container to the outside therethrough, a plate provided on the one surface of the container in such a manner as to cover the injection holes, and a connecting device for connecting the plate and the container. The connecting device allows the plate to move away from the one surface of the container by a predetermined distance.

Abstract: A modular cover for an air bag system is formed of a rigid inner layer, a soft outer layer, and a tear line along which the modular cover is torn. The tear line includes a raised portion extending from the inner layer into the outer layer, and a recessed portion formed in the inner surface of the modular cover. The modular cover includes projecitons projecting from the inner layer into the outer layer and located adjacent to the tear line so as to prevent the outer layer from suffering from depressions. The projections are formed in a shape such that the their width decreases from an upstream side to a downstream side along a flow direction of the resin when the outer layer is molded.

Abstract: A bag holding member in an air bag device for protecting the occupant of a vehicle has an opening in which a bag inflator is fitted. The inflator has a flange held against the bag holding member around its opening. One of the bag holding member and the flange has a plurality of pins projecting toward the other, and the other has a plurality of slits lying circumferentially of the opening of the bag holding member. Each of the pins is engaged in one of the slits to secure the inflator to the bag holding member.

Abstract: A retainer used for an air bag device for use in a driver's side of a vehicle includes a main plate portion having an opening for mounting an inflator and mounting members depending from the sides of the main plate portion, wherein the retainer is made of a synthetic resin.

Abstract: A bag holding member has an opening where the inflator is inserted. The member has a cylindrical wall projecting coaxially with the opening. The inflator extends through the cylindrical wall. The cylindrical wall has slits extending spirally. The inflator has pins projecting from its outer periphery. The pins engage the slits respectively to secure the inflator to the cylindrical wall.

Abstract: An air bag device for a passenger's seat includes a module cover mounted to a case containing an air bag in a folded state protrusive strips for holding the folded air bag are provided on the rear of said module cover.

Abstract: An air bag device includes: a retainer having an inflator mounting opening formed in the central portion of its main plate; an inflater having its leading end mounted in the opening of the retainer and formed with a plurality of gas injection ports in its side periphery; an air bag fitted on the retainer and folded such that it can be extended by the gas injected from the inflator; and a module cover covering the air bag and capable of being torn by the air bag when the air bag is extended. The air bag is folded at first in a first direction along the main plate of the retainer and then in a second direction perpendicular to the first direction. The inflator injects the gas in the second direction, immediately after being activated, and then in the first direction.

Abstract: A module cover mounting structure for an air bag device for a passenger, is formed of an opening formed in the instrument panel of an automobile for mounting the air bag device, a module cover for covering the opening such that its peripheral edge covers the edge of the opening inside of the cabin of the automobile, and a plurality of tear lines formed in the module cover and adapted to be torn by the push of said air bag, when the air bag is inflated. The central portion of the module cover is torn into a door shape to be opened into the cabin. The tear lines are composed of a lefthand tear line running along the side of said module cover at the lefthand side of the automobile and a righthand tear line running along the side at the righthand side of the automobile. The lefthand and righthand tear lines run up to the edge of the module cover at the back side of the automobile.

Abstract: In a module cover attaching structure of an air bag device for a passenger, a module cover is attached to a casing accommodating an air bag in a folded form, and an attachment piece provided at a rear surface of the module cover is attached to the casing. The attachment piece provided at a front edge, in a longitudinal direction of a vehicle, of the casing has at least one bendable portion.

Abstract: An air bag device for a driver seat is formed of a retainer composed of a main plate portion having an opening for mounting an inflator and mounting pieces extending uprightly from peripheral edges of the main plate portion, an air bag having a rear end connected to the retainer, an inflator mounted on the retainer, and a module cover for covering the air bag, the retainer being made of a synthetic resin, and the rear end of the air bag being secured to the retainer by embedding the rear end in the retainer. In an air bag for a passenger seat, a container for the air bag is made of a synthetic resin to secure the rear end of the air bag to the container.

Abstract: A lid covers an opening of a container accommodating an air bag in a folded form. Upon development of the air bag, the lid pushed by the air bag is partially or fully rotated in a door-like form. The lid has a portion, which is located near a tip end of the lid during rotation and contacts a windshield of a vehicle. The lid is provided with a linear bendable portion, which enables rearward bend, in view of a rotating direction, of the portion near the tip end of the lid.

Abstract: According to a method of producing a modular cover, a gate mark made during injection molding and left on a cover can not be seen from a vehicle occupant. A submarine gate is placed in a mold to contact with a surface of a molded modular cover which is hidden when the modular cover is in use. This mold is used to make a cover by one-color injection molding.

Abstract: An air bag cover includes recessed portions for tearing the cover which are disposed to be spaced apart from each other in a row to the inner surface, each of the top ends of recessed portions in the direction of the row being pointed, toward each of adjacent recessed portions. The pointed top end is situated at a position deviated from a center for the recessed portion along a lateral direction of the recessed portion.

Abstract: A modular cover (1) provides for large deformation of a flap to allow rapid deployment of an air bag in all directions. The modular cover (1) includes tear lines (2, 3, 4), and engaging portions at its lateral sides to join spokes (12) of a steering wheel. Ends of the tear lines (3, 4) extend along the engaging portions.

Abstract: An air bag-containing cover comprising:a soft surface skin layer made of a thermoplastic polymer containing the following ingredients A, B, C and D:ingredient A: a hydrogenated derivative of a block copolymer comprising styrene an conjugated diene,ingredient B: an olefinic resin,ingredient C: polyisobutylene with a viscosity average molecular weight of not greater than 70,000, andingredient D: a hydrocarbon series rubber softening agent with a kinetic viscosity at 40.degree. C. of not greater than 500 cSt and/or polybutene with a number average molecular weight of not greater than 2500, in which blending ratio is:ingredient A=40 to 80% by weight,ingredient B=5 to 30% by weightingredient C=2 to 30% by weightingredient D=0 to 20% by weight, and having a JIS-A hardness according to JIS-K6301 of from 20 to 90, anda rigid core layer comprising an olefinic resin having a modulus in flexure according to JIS-K7203 of from 1000 to 7000 kg/cm.sup.

Abstract: A cover for accommodating an air bag, which is provided at its inner surface with an array of spaced holes for starting tear at a start of an operation of the air bag, is characterized in that ends of the holes in the direction of the array have acute shapes converging toward the adjacent holes, respectively.

Abstract: A molding method is used to produce a module cover for an air bag device which has undercut portions in mounting edge portions thereof. A lower mold disposed inside the module cover to be produced is of the split type so that is includes a central mold disposed at the center and a plurality of lateral molds for molding of the undercut portions. The mating face of the central mold with each lateral mold is oblique so that its bottom is closer to the edge of the module cover than its top. Thus, the module cover produced can be detached from the lower mold by moving the lateral molds mutually inward.