JP5798819B2 - Airbag device - Google Patents

Description

  The present invention relates to an airbag device that can more safely protect a passenger such as a vehicle.

  In order to protect an occupant of a vehicle from an impact at the time of an accident, it is widely used to incorporate an airbag into an instrument panel or a steering wheel of the vehicle. Also, in order to more fully protect the occupant's body, especially the main part from the waist to the abdomen, it has been proposed to assemble the airbag to the seat belt that is worn across the abdomen of the occupant seated on the seat. (Patent Document 1). It is also known that airbags are incorporated in the left and right sides of the seat back to protect the occupant during a vehicle side collision (Patent Document 2).

JP-A-9-118192 Japanese Patent Laid-Open No. 2002-2344

  According to the former of the prior art, the seat belt for assembling the airbag crosses the abdomen of the occupant, but the overall volume tends to be excessive, and there is a problem that it may interfere with the driving operation of the vehicle. I can't. In the latter case, the airbag built in the left and right sides of the backrest only inflates toward the side wall of the vehicle at the time of a side collision of the vehicle, so that the protection function of the occupant's body is not necessarily sufficient. There was a problem.

  Therefore, in view of the problems of the prior art, an object of the present invention is to provide a function of protecting the occupant's body by incorporating a pair of left and right abdominal airbags into the seating surface of the seat without hindering driving operation of the vehicle. An object of the present invention is to provide an airbag device that can be further improved.

  In order to achieve such an object, the invention according to claim 1 is configured such that left and right abdominal airbags are incorporated in the seat surface of a seat on which an occupant sits, and the abdominal airbag is provided on the seat surface of the seat. It bulges upward from the left and right sides and joins together at the front of the occupant's abdomen, the lower surface of the joint is in close contact with the thigh of the occupant, the rear side contacts the abdomen, and the maximum height reaches the height of the chest This is the gist.

  Note that the abdominal airbag can be joined via a joining surface of any one of a parallel inclined surface and a concavo-convex surface fitted to each other, and can be joined by a surface fastener.

  According to a fourth aspect of the present invention, left and right head airbags and head auxiliary airbags are incorporated into a seat on which an occupant is seated. The head airbag is inflated forward from the center of the seat headrest and joined to the head airbag. The gist is to do.

  Note that the airbag for the head may be joined via a joining surface of any one of a slope parallel to each other and an uneven surface fitted to each other, or may be joined by a surface fastener.

  The gist of the invention according to claim 7 is that the airbag device according to any one of claims 1 to 3 and the airbag device according to any one of claims 4 to 6 are combined. To do.

  According to the configuration of the first aspect of the present invention, when the left and right abdominal airbags incorporated in the seat on which the occupant is seated are subjected to an excessive impact on the vehicle or the like when a collision accident occurs, the seat surface of the seat By bulging upward from the left and right sides and joining together on the front of the occupant's abdomen, it is possible to effectively protect the main body part from the occupant's thigh to the abdomen through the waist. When the airbags for the left and right abdomen are joined together, the lower surface side of the joined part is in close contact with the thigh of the occupant, the rear side is in contact with the abdomen, and the maximum height reaches the height of the chest. To do. In addition, the passenger on the seat is supposed to wear a seat belt, and the airbag is combined with necessary components such as an acceleration detection sensor, a control unit, and an inflator, for example, within a short time of several tens of ms or less. It expands and automatically contracts after completion of expansion.

  The airbag for the abdomen can disperse the collision load applied to the joint surface by joining through one of the joint surfaces of the inclined surfaces parallel to each other and the concavo-convex surfaces fitted to each other. However, the slope here means, for example, a plane inclined obliquely with respect to the front direction of the occupant's body in a top view. Further, such a sloped or uneven joining surface can be joined to a necessary and sufficient strength almost instantaneously by using a surface fastener.

  When the invention according to claim 4 is adopted, the right and left head airbags and the head auxiliary airbag are incorporated into the headrest of the seat so that the vehicle can The passenger's head can be effectively protected. The airbag for the head must be protected from the left and right sides of the head and the front part of the headrest by inflating forward from the left and right ends of the headrest and joining them at the front of the occupant's head. This is because the auxiliary airbag for the head can be protected by covering the upper part of the head by inflating forward from the central portion of the headrest and joining the airbag to the head.

  The airbags for the left and right heads also operate in the same manner as the airbags for the left and right abdomen, and are joined via slopes that are parallel to each other or joint surfaces with concave and convex surfaces that are fitted to each other. By joining, the same effect as the abdominal airbag can be realized. The auxiliary airbag for the head operates and inflates in the same manner as the airbags for the left and right heads, and is commonly joined to the upper surfaces of the joined airbags for the left and right heads. Again, hook and loop fasteners can be used.

  When the structure of the invention according to claim 7 is used, the airbag apparatus according to any one of claims 1 to 3 and claim 4 to claim 6 is combined, so that the body of the passenger on the seat Both the main part and the head can be effectively protected.

Overall operation diagram 1 is a schematic top view of the main part of FIG. 1 is a schematic top view of the main part of FIG. 1 is a schematic explanatory diagram of the main part of FIG. Overall configuration diagram Main part operation explanatory diagram Main part structure explanatory drawing which shows other embodiment. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The airbag apparatus includes an airbag apparatus 10 having airbags 11 and 11 for left and right abdomen, airbags 21 and 21 for left and right heads, and a head for a seat 30 on which a vehicle occupant M is seated. And an airbag device 20 having the secondary airbag 22 (FIG. 1). However, in FIG. 1, only one of the airbags 11 and 11 for the left and right abdomen and the airbags 21 and 21 for the left and right heads are shown. Moreover, in FIG. 1, each airbag 11, 21, and 22 have each illustrated the operating state.

  The seat 30 includes a seat surface 31, a backrest 32, and a headrest 33. The seat 30 is mounted on a vehicle body (not shown) via base members 34, 34, so that an occupant M can be seated and various operating devices including the steering wheel WH can be appropriately operated. However, the seat 30 is not limited to the driver seat of FIG. 1, and may be for a passenger seat or a passenger seat. Further, the headrest 33 of the seat 30 may be formed integrally with the backrest 32 regardless of FIG.

  The airbags 11 and 11 for the left and right abdomen of the airbag device 10 are respectively incorporated into the left and right ends of the seat surface 31 of the seat 30 via the storage part 12 (FIGS. 1 and 2A). . However, each air bag 11 is compactly folded and stored in the corresponding storage portion 12, and in operation, an inflator (not shown) is ignited and rapidly inflated to form on the left and right side portions of the seat surface 31. It bulges upward from the split portion and is joined to each other on the front surface of the abdomen of the occupant M. In other words, the left and right airbags 11 and 11 are joined together via a joining surface S1 having inclined surfaces parallel to each other, and can be instantly joined to a necessary and sufficient joining strength by a surface fastener (not shown) previously attached to the joining surface S1. it can.

  Note that the airbags 11 and 11 may be joined via the joint surface S1 of the concavo-convex surface fitted to each other (FIG. 2B). 2 (A) and 2 (B) are schematic top views of relevant parts, with the airbag device 20 of FIG. 1 omitted, respectively.

  The airbags 21 and 21 for the left and right heads of the airbag device 20 are respectively incorporated into the left and right end portions of the headrest 33 of the seat 30 via the storage portion 23 (FIGS. 1 and 3A). . Each airbag 21 is compactly folded and accommodated in the corresponding accommodating portion 23, and in operation, an inflator (not shown) is ignited and rapidly inflated to form a tear formed at the left and right end portions of the headrest 33. It bulges forward from the part and joins to each other at the front of the head of the occupant M. That is, the left and right airbags 21 and 21 are joined to each other via a joining surface S2 having inclined surfaces parallel to each other, and instantly joined to a necessary and sufficient joining strength by a surface fastener (not shown) previously attached to the joining surface S2. it can.

  Note that the airbags 21 and 21 may be joined via a concave-convex joint surface S2 that fits together (FIG. 3B). However, FIGS. 3 (A) and 3 (B) are schematic top views of relevant parts, with the head auxiliary airbag 22 in FIG. 1 omitted, respectively.

  The auxiliary airbag 22 for the head of the airbag device 20 is incorporated in the central portion of the headrest 33 of the seat 30 via the storage portion 24 (FIGS. 1 and 4A). The auxiliary airbag 22 is stored in a compactly folded manner in the storage portion 24. During operation, the inflator (not shown) is ignited to rapidly inflate and forward from the cleaved portion formed on the upper surface of the central portion of the headrest 33. And joined to the upper surfaces of the joined airbags 21 for the head. In FIG. 4A, the joining surface S3 between the auxiliary airbag 22 and the airbags 21 and 21 is shown together, and the joining surface S3 is also joined by a surface fastener.

  FIG. 4B schematically shows the side surface shape of the joint surface S2 of the right and left head airbags 21 and 21. FIG. FIG. 4B also shows the inner shape of the front and front of the occupant M formed by the airbags 21 and 21 and the auxiliary airbag 22. The auxiliary airbag 22 is inflated slightly later than the airbags 21 and 21, and an inflator common to the airbags 21 and 21 can be used as long as an appropriate inflation time difference can be realized. 4A and 4B are a schematic top view and a detailed schematic view of relevant parts of FIG.

  A control unit 41 is combined with the airbag apparatuses 10 and 20 incorporated in the seat 30 (FIG. 5). An output signal Ag of an acceleration sensor 42 for detecting the impact force of the vehicle is input to the control unit 41, and an ignition signal Ig from the control unit 41 is not shown for the airbag device 10 and the airbag device 20 (not shown). It is transmitted to the inflator. Each inflator for the airbag devices 10 and 20 may be provided integrally with the storage units 12 and 23 or may be provided separately.

  When an excessive impact force is applied to the vehicle due to a collision accident or the like, the control unit 41 generates an ignition signal Ig based on the output signal Ag of the acceleration sensor 42. Therefore, the inflator for the airbag devices 10 and 20 is ignited, and the airbags 11 and 11 for the left and right abdomen, the airbags 21 and 21 for the left and right heads, and the auxiliary airbag 22 for the heads are activated. The bulge and the occupant M can be protected appropriately.

  In the above description, instead of incorporating both the airbag devices 10 and 20 into the seat 30, only one of them can be incorporated.

Other embodiments

  The airbags 21 and 21 for the left and right heads of the airbag apparatus 20 can control the manner of deployment by forming an integral auxiliary chamber 21a inside each of them (FIG. 6). Each auxiliary chamber 21a communicates with a corresponding airbag 21 through communication holes 21b, 21b.

  When the airbags 21 and 21 start to be inflated by the gas from the inflator (FIG. 6A), the inflation of each airbag 21 is completed and the airbags 21 and 21 are joined via the outer joining surface S2a. (FIG. 5B), each auxiliary chamber 21a begins to expand due to the gas from the communication holes 21b, 21b. When the expansion of each of the auxiliary chambers 21a is completed and the auxiliary chambers 21a and 21a are joined via the inner joining surface S2b ((C) in the figure), the inflation joining operation of the airbags 21 and 21 as a whole is completed. To do. The left and right abdominal airbags 11, 11 of the airbag device 10 may also be provided with auxiliary chambers according to FIG. 6.

  A shock absorbing mechanism 50 including a damper 51 can be combined with the base members 34, 34,... For mounting the seat 30 on the vehicle body (FIGS. 7 and 8). The base members 34, 34... Having the buffer mechanism 50 are arranged on the front, back, left, and right of the lower surface of the sheet 30 with the longitudinal direction aligned with the front and rear direction of the sheet 30. 7A and 7B are a side view and a top view, respectively, of the base member 34. FIGS. 8A and 8B are XX and Y lines in FIG. 7B, respectively. FIG.

  The damper 51 is, for example, a hydraulic or pneumatic piston type, and is mounted on the base material 34 in the front-rear direction. The cylinder side of the damper 51 is connected to a fixed bracket 51 a on the base material 34, and the tip of the piston is connected to a slider 52 that can slide only on the base material 34 in the front-rear direction. A pair of front and rear brackets 34 a, 34 a... Connected to the vehicle body is suspended on the lower surface of the base member 34, and a bracket 52 a connected to the seat 30 is erected on the upper surface of the slider 52. .

  A screw hole 52b is formed in the slider 52 so as to penetrate vertically. A coil spring 53a and a movable plug 53b are inserted into the screw hole 52b, and an adjustment bolt 53 is screwed therein. The movable stopper 53b can move up and down in the screw hole 52b, and is biased downward via the coil spring 53a. Further, a conical portion 53c having a gentle slope is formed at the lower end of the movable plug 53b, and a recess 34b corresponding to the conical portion 53c of the movable plug 53b is formed in the base plate 34. Note that the tip of the conical portion 53c is lightly rounded.

  Accordingly, since the conical portion 53c at the lower end of the movable plug 53b is fitted in the recess 34b during normal times when no collision accident or the like has occurred (FIGS. 7 and 8A), the slider 52 is placed on the base material 34. The seat 30 is fixed to the vehicle body. When an excessive impact force is generated in the front-rear direction of the seat 30 due to a collision accident or the like, the conical portion 53c of the movable plug 53b escapes from the recess 34b against the pressing force by the coil spring 53a (see FIG. 8B). Dotted line, solid line). Therefore, the slider 52 can move in the longitudinal direction of the base plate 34. At this time, the damper 51 can brake the slider 52 and relieve the impact force applied to the seat 30. When the pressing force by the coil spring 53a is adjusted via the adjusting bolt 53, the magnitude of the impact force that operates the damper 51 can be variably set.

  The present invention is not limited to vehicles such as automobiles, and can be widely and suitably applied for protecting passengers of arbitrary moving bodies such as ships, airplanes, and roller coasters.

M ... Occupant S1, S2, S3 ... Joint surface 10, 20 ... Airbag device 11, 21 ... Airbag 22 ... Sub-airbag 30 ... Seat 31 ... Seat surface 33 ... Headrest

Patent Applicant Linear Circuit Co., Ltd.

Claims (7)

Occupant becomes incorporate air bag for the left and right abdomen on the seat surface of the seat to be seated, the airbag for the abdomen, the left and right sides of the seating surface of the seat bulges upward in front of the occupant's abdomen They joined together, the lower surface side in close contact with the thigh of the occupant of the joint portion, the rear side is in contact with the abdomen, an air bag device maximum height, characterized in that reach the height of the chest.   2. The airbag apparatus according to claim 1, wherein the abdominal airbag is joined via a joint surface of any one of a slope parallel to each other and an uneven surface fitted to each other.   The airbag device according to claim 2, wherein the abdomen airbag is joined by a hook-and-loop fastener.   The left and right head airbags and the head auxiliary airbag are incorporated in the seat on which the occupant is seated, and the head airbag bulges forward from the left and right ends of the headrest of the seat, The head auxiliary airbag is inflated forward from the center of the headrest of the seat and joined to the head airbag while being joined to each other at the front of the passenger's head. Bag device.   5. The airbag device according to claim 4, wherein the head airbag is joined via a joint surface of any one of a slope parallel to each other and a concavo-convex surface fitted to each other.   6. The airbag device according to claim 5, wherein the head airbag is joined by a hook-and-loop fastener.   The airbag apparatus which combines the airbag apparatus in any one of Claims 1 thru | or 3, and the airbag apparatus in any one of Claims 4 thru | or 6.

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