JP4470894B2 - Crew restraint system - Google Patents

Description

  The present invention relates to an occupant restraint device for restraining an occupant of a seat of a vehicle such as an automobile at the time of a collision, and in particular, restrains an occupant's waist during a frontal collision, and the occupant's body moves forward and downward. The present invention relates to an occupant restraint device configured to prevent.

  As a system for restraining the vehicle occupant at the time of collision, the front part of the seat cushion at the time of vehicle collision is used to prevent the submarine phenomenon that the occupant tries to pass through the lower side of the lap belt even when the seat belt is worn. Japanese Patent Application Laid-Open No. 2005-126051 describes an occupant restraint device for increasing the height of the vehicle.

In the passenger restraint device disclosed in the publication, a recessed portion is provided in the front portion of the seat pan, and an airbag is disposed in the recessed portion. Further, a cover is provided so as to cover the recessed portion, thereby preventing rubbing between the airbag and the seat cushion.
JP 2005-126051 A

  The paragraph 0033 of JP 2005-126051 A describes that the provision of a cover prevents water and foreign matter from entering the recessed portion.

  An object of the present invention is to provide an occupant restraint device in which water and moisture are prevented from entering along a routing portion of a harness.

An occupant restraint device according to claim 1 is disposed between a seat cushion lower member and a seat cushion, and an inflatable airbag so as to press the seat cushion from below, and for inflating the airbag An air bag module having a gas generator and a retainer to which the air bag and the gas generator are connected and fixed to the lower member of the seat cushion by a fixing means is provided. In an occupant restraint device in which a series of harnesses is pulled out to the lower side of the seat cushion lower member through the opening of the seat cushion lower member, a seal member is provided for sealing between the opening and the harness. The seal member is made of a rubber bushing, and the seal member has a flange portion in close contact with the upper surface of the peripheral edge portion of the opening. In the seat cushion lower member, the peripheral edge portion of the opening is a low place lower than the outer periphery, and the depth of the low place is smaller than the thickness of the flange portion. The flange portion is disposed in the low place, and the airbag module is disposed so as to overlap the upper surface of the seat cushion lower member and the upper surface of the flange portion around the low portion. The flange portion is pressed against the low place by the airbag module .

The occupant restraint device according to claim 2 is the occupant restraint device according to claim 1, wherein the retainer has a plate shape along the upper surface of the lower member of the seat cushion, and the seal member is disposed at a position overlapping the retainer. It is a feature.

An occupant restraint device according to a third aspect of the present invention is the occupant restraint device according to the first or second aspect, wherein the airbag module is disposed so as to extend in a left-right width direction of the seat cushion lower member, and the fixing means is the seal It is arrange | positioned at the right-and-left both sides of a member, It is characterized by the above-mentioned.
An occupant restraint device according to a fourth aspect of the present invention is the occupant restraint device according to any one of the first to third aspects, wherein the seal member is adjacent to the flange portion and has a circumferential groove provided around the seal member, and sandwiches the circumferential groove. And the inner peripheral edge of the opening is engaged with the circumferential groove, and the diameter of the seal member on the groove bottom surface of the circumferential groove is: The opening is larger than the inner diameter of the opening, and the groove bottom surface of the circumferential groove is in close contact with the inner periphery of the opening.

The occupant restraint device according to claim 5 is characterized in that, in any one of claims 1 to 4 , the harness is inserted into a protective sheath, and at least a part of the protective sheath is in close contact with the seal member. To do.

The occupant restraint device according to claim 6 is the occupant restraint device according to claim 5 , wherein a groove extending in a circumferential direction or a spiral direction is provided on the outer peripheral surface of the protective sheath, and the seal member is in close contact with the inner surface of the groove. It is characterized by.

  In the occupant restraint device of the present invention, since the seal member is provided between the opening of the lower member of the seat cushion and the harness, water and moisture are prevented from entering along the routing portion of the harness.

The sealing member is not good and fitted into the opening even those in close contact with the opening peripheral surface. In the present invention, the sealing member, Ru der those in close contact with the upper surface of the peripheral edge of the opening. This prevents water and moisture from entering through the opening.

  In the present invention, the harness may be inserted into the protective sheath, and at least a part of the protective sheath may be in close contact with the seal member. In this case, water and moisture are prevented from entering through the opening.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 is a perspective view of a seat frame provided with an occupant restraint device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is a sectional perspective view of a seat pan. FIG. 4 is a perspective view of the airbag module of the passenger restraining apparatus as viewed from below, and FIG. 5 is an exploded view of the airbag module and the seat pan. FIG. 6 is a cross-sectional view showing a harness routing structure, and FIG. 7 is a perspective view showing the harness.

  A frame constituting an automobile seat includes a base frame 1 and a back frame 4 rotatably connected to the base frame 1 via a support shaft 2 and a reclining device (not shown). A headrest 6 is attached to the upper portion of the back frame 4.

  The base frame 1 has left and right side frames 1a and 1b. A seat pan 8 is installed between the front portions of the side frames 1a and 1b. Side wall portions 8a and 8b are provided on both ends of the seat pan 8 in the left-right width direction so as to overlap the inner side surfaces (side surfaces of the side frames 1a and 1b facing each other) of the side frames 1a and 1b. The side frames 1a and 1b and the side wall portions 8a and 8b are respectively provided with bolt insertion holes (not shown) so as to pass through the overlapping portions, and the bolts 1c are inserted into the holes, respectively. The seat pan 8 is fixed between the side frames 1a and 1b by tightening the nut 8c to the bolt 1c.

  Although not shown, a seat cushion and a seat back made of urethane or the like are attached to the base frame 1 and the back frame 4. The seat pan 8 is disposed below the front portion of the seat cushion.

  An air bag module 10 of an occupant restraint device is attached to the seat pan 8.

  The airbag module 10 is disposed between the seat pan 8 and the seat cushion in a folded state, and expands so as to press the seat cushion from below by introducing gas into the interior. The airbag 12, the gas generator 14 for inflating the airbag 12, and the airbag 12 and the gas generator 14 are connected to each other and fixed to the seat pan 8 by a stud bolt 20 described later. A retainer 16 and a surrounding body 18 surrounding the folded body of the airbag 12 so as to restrain the airbag 12 in a folded state are provided. The airbag 12 is disposed so as to extend in the left-right width direction (vehicle body width direction) of the seat pan 8. The tip of the harness 10 h is connected to the gas generator 14. The harness 10 h is routed to the lower side of the seat pan through the opening 8 k of the seat pan 8.

  In this embodiment, on the upper surface of the seat pan 8, an airbag module housing portion 8 d (first portion) comprising a concave step portion that is one step lower by the height (size in the vertical direction) of the airbag module 10. 3), and the airbag module 10 is installed in the housing portion 8d.

  In this embodiment, the retainer 16 has a plate shape that can follow the bottom surface of the airbag module housing portion 8d. A stud bolt 20 protrudes downward from the lower surface of the retainer 16. The stud bolt 20 is inserted into a bolt insertion hole (reference numeral: see FIG. 5) formed in the lower portion of the airbag 12 and extends to the outside of the airbag 12.

  As shown in FIG. 5, the enclosure 18 is routed around the lower side of the airbag 12. The stud bolt 20 extends through the enclosure 18 further downward.

  The stud bolt 20 is further inserted into a bolt insertion hole 8e (FIGS. 3 and 5) formed in the bottom surface of the airbag module housing portion 8d. The nut 16 is tightened into the stud bolt 20 from the lower side of the seat pan 8 so that the retainer 16 is fixed to the bottom surface of the airbag module housing portion 8d.

  The gas generator 14 is attached to the upper surface side of the retainer 16 by a bracket 30 provided integrally with the retainer 16. The gas generator 14 has a substantially cylindrical shape in this embodiment, and is disposed in the airbag 12 such that the axial direction of the gas generator 14 is the left-right width direction of the seat pan 8. The bracket 30 protrudes from the front edge (the front edge of the vehicle) of the retainer 16, and has a C-shaped band portion 30 a that is bent on the upper surface side of the retainer 16 so as to be bent in a substantially C shape. And a flange portion 30b extending so as to overlap the upper surface of the retainer 16 from the distal end side of the character-shaped band portion 30a. The stud bolt 20 protrudes downward from the lower surface side of the flange portion 30 b, extends through the retainer 16, and extends below the retainer 16.

  The gas generator 14 is fixed to the retainer 16 by inserting the gas generator 14 inside the C-shaped band portion 30a and then tightening the nut 24 to the stud bolt 20 to clamp the flange portion 30b and the retainer 16. Is done.

  In this embodiment, the envelope body 18 is in the form of a bag that encloses the entire folded body of the airbag 12 as shown in FIG.

  As described above, the harness 10 h passes through the airbag 12 and the enclosure 18, and is further drawn out to the lower side of the seat pan 8 through the opening 8 k of the seat pan 8.

  As shown in FIG. 4, in this embodiment, two stud bolts 20 are provided at intervals in the longitudinal direction of the airbag module 10 (the left-right width direction of the seat pan 8). The harness 10h is inserted into a harness insertion hole (not shown) provided near the middle of the bolt insertion holes through which the stud bolts 20 are inserted in the lower surface of the airbag 12, and is pulled out of the airbag 12. It is.

Further, as shown in FIG. 3, the bottom surface of the seat pan 8 (the bottom surface of the airbag module 8d accommodating portion) is overlapped with each bolt insertion hole and harness insertion hole on the lower surface of the airbag 12, The bolt insertion hole 8e and the opening 8k are disposed (that is, two bolt insertion holes 8e are provided at intervals in the left-right width direction of the seat pan 8, and these bolt insertion holes 8e, An opening 8k is provided in the vicinity of the middle between 8e).

  As shown in FIG. 7, in this embodiment, the front end of the harness 10h is connected to the gas generator 14 via the connector 10a, and the rear end is connected to the vehicle body side harness (not shown) via the connector 10b.

A seal member (rubber bushing in the present invention ) 50 is attached to the harness 10h. The seal member 50 includes a flange portion 51, a circumferential groove 52 adjacent to the flange portion 51 and provided around the seal member 50, and a body portion extending in a direction opposite to the flange portion 51 across the circumferential groove 52. 53 and a harness insertion hole 54 penetrating from the flange portion 51 side to the trunk portion 52 side. The harness 10 h is inserted through the harness insertion hole 54. The seal member 50 may be externally fitted to the harness 10h before the one connector 10a or 10b is attached to the harness 10h. The seal member 50 is provided with a slot, and the slot is pushed open. May be attached to the harness 10h.

  As shown in FIGS. 3 and 5, the peripheral edge of the opening 8k through which the harness 10h is inserted is a low point 8t that is one step lower than the outer periphery. The depth of the low portion 8t is smaller than the thickness of the flange portion 51 of the seal member 50. The seal member 50 is mounted on the opening 8k so that the inner peripheral edge of the opening 8k is engaged with the circumferential groove 52 and the flange portion 51 is disposed in the low portion 8t. The diameter of the seal member 50 at the groove bottom surface of the circumferential groove 52 is slightly larger than the inner diameter of the opening 8k, and the groove bottom surface of the circumferential groove 52 is in close contact with the inner periphery of the opening 8k.

  In order to assemble this occupant restraint device to the seat pan 8, the air bag module 10 is connected to the retainer 16 before the air bag 12 and the gas generator 14 are attached to the seat pan 8. It is folded and assembled to the state of FIG. 4 in which the envelope 18 is attached to the folded body of the airbag 12. The harness 10h is connected to the gas generator 14, and is pulled out through the airbag 12 and the enclosure 18.

  A seal member 50 is attached to the harness 10h in advance.

  Thereafter, the airbag module 10 assembled in this way is placed in the accommodating portion 8 d of the seat pan 8. At this time, the harness 10h is inserted into the opening 8k, the seal member 50 is fitted into the opening 8k, and the flange portion 51 is disposed in the low portion 8t. Further, each stud bolt 20 is inserted into the corresponding bolt insertion hole 8 e, and a nut 26 is tightened into the stud bolt 20. Thereby, the airbag module 10 is fixed to the seat pan 8.

  By tightening the nut 26, the airbag module 10 presses the flange portion 51 against the low place 8t.

  In this way, the flange portion 51 is pressed against the low portion 8t, and as described above, the groove bottom surface of the circumferential groove 52 of the seal member 50 is in close contact with the inner periphery of the opening 8k. This prevents water and moisture from entering the airbag module 10 through the opening 8k.

  In this embodiment, the airbag module 10 is fixed to the seat pan 8 by the stud bolts 20 on both the left and right sides with the seal member 50 interposed therebetween, so that the seal member 50 is substantially equally left and right. 8 and the lower surface of the airbag module 10. As a result, the sealing performance by the seal member 50 is good.

  However, the arrangement of the seal member 50 is not limited to this. For example, the seal member 50 may be disposed at a position closer to the end of the airbag module 10 in the longitudinal direction than the stud bolts 20. Further, the seal member 50 may be disposed at a position that overlaps with the lower surface of the retainer 16 among the lower surfaces of the airbag module 10, and is disposed at other positions (positions that do not overlap with the lower surface of the retainer 16). Also good.

  In the above embodiment, the groove bottom surface of the circular groove 52 is also in close contact with the inner periphery of the opening 8k. However, as shown in FIGS. 8 (a) and 8 (b), the circular groove is omitted, and the flange portion 51 is cylindrical. Alternatively, a sealing member 50A may be used in which a cylindrical body 53 is directly connected and the diameter of the body 53 is smaller than the inner diameter of the opening 8k. In this case, the intrusion of water or moisture is prevented by the flange portion 51 being in close contact with the low place 8t.

  The seal member 50A in FIG. 8 has a circular flange portion 51, but seal members 50B and 50C having a square flange portion 51 may be used as shown in FIGS. 9 (a) and 9 (b). The body portion does not have to be cylindrical, and may be non-circular such as a rectangular tube as shown in FIG. 9 (b). The square tube is not limited to a quadrangle, and may be a triangle or a polygon that is a pentagon or more.

  In the present invention, as shown in FIGS. 10 (a) and 10 (b), seal members 50D and 50E made of only the flange portion may be used.

  In the present invention, as shown in FIG. 11, the harness 10h may be inserted into the protective sheath 60, and the protective sheath 60 may be inserted into the harness insertion hole 54 of the seal member 50F. Further, as the protective sheath 60, a sheath made of a corrugated tube in which a spiral or circular groove 61 is provided on the outer peripheral surface as shown in the figure may be used.

  The seal member 50F is different from the seal member 50 in that a projection 55 is provided on the inner peripheral surface of the harness insertion hole 54 and a large diameter so that the harness insertion hole 54 can be inserted through the protective sheath 60. The other structure is the same as that of the seal member 50. This seal member 50F is also used so that the circumferential groove 52 is fitted into the opening 8k and the flange portion 51 is disposed above the opening 8k.

  The flange portion 51 is pressed against the low portion 8t, and the protrusion 55 is brought into close contact with the inner surface of the groove 61, thereby preventing water and moisture from entering through the through hole 54.

Each of the above embodiments is an example of the present invention, and the present invention can take forms other than those shown in the drawings. For example, in the above embodiment, the envelope body 18 of the airbag module 10 is pressed against the upper surface of the seal member. However, the envelope body 18 may be omitted and the airbag may press the seal member.

  Further, the airbag may be accommodated in the casing, and the harness 10h may be pulled out from the bottom surface of the casing. In this case, the bottom surface of the casing presses the seal member from above.

  Further, in each of the above embodiments, the airbag is connected to the retainer and the retainer is fixed to the seat pan by a common stud bolt, but the stud bolt for connecting the airbag to the retainer A stud bolt for fixing the retainer to the seat pan may be provided. The means for connecting the airbag to the retainer and the means for fixing the retainer to the seat pan are not limited to stud bolts and nuts.

  In the above embodiment, the airbag module 10 is disposed above the seat pan 8, but a member other than the seat pan may be installed between the side frames 8a and 8b, and the airbag module may be disposed thereon. .

It is a perspective view of the flame | frame of a sheet | seat provided with the passenger | crew restraint apparatus which concerns on one form of this invention. It is sectional drawing which follows the II-II line of FIG. It is a cross-sectional perspective view of the seat pan of the passenger | crew restraint apparatus of FIG. It is a perspective view of the airbag module of the passenger | crew restraint apparatus of FIG. It is an exploded view of the airbag module and seat pan of the passenger | crew restraint apparatus of FIG. It is sectional drawing which shows the routing structure of a harness. It is a perspective view which shows a harness. It is a block diagram which shows the other structural example of a harness routing part. It is a perspective view of another sealing member. It is a perspective view of another sealing member. Furthermore, it is sectional drawing which shows a different harness routing part.

Explanation of symbols

8 Seat Pan 8d Airbag Module Housing 8e Bolt Insertion Hole 8k Opening 8t Low 10 Airbag Module 10h Harness 12 Airbag 14 Gas Generator 16 Retainer 50, 50A-50F Seal Member 60 Protective Sheath

Claims (6)

An airbag that is disposed between the seat cushion lower member and the seat cushion and is inflatable so as to press the seat cushion from below;
A gas generator for inflating the airbag;
A retainer to which the airbag and the gas generator are respectively connected and fixed to the lower member of the seat cushion by a fixing means;
Comprising an airbag module having
In the occupant restraint device in which the harness connected to the gas generator is pulled out to the lower side of the seat cushion lower member through the opening of the seat cushion lower member,
A seal member is provided for sealing between the opening and the harness ;
The seal member is made of a rubber bushing,
The seal member has a flange portion in close contact with the upper surface of the peripheral edge portion of the opening,
Of the seat cushion lower member, the peripheral edge of the opening is a low place lower than the outer periphery,
The depth of the low portion is smaller than the thickness of the flange portion,
The flange portion is disposed in the low place,
The airbag module is disposed so as to overlap the upper surface of the lower member of the seat cushion and the upper surface of the flange portion around the low place,
The occupant restraint device , wherein the flange portion is pressed against the low place by the airbag module . In Claim 1, the retainer is a plate shape along the upper surface of the seat cushion lower member,
The occupant restraint device, wherein the seal member is disposed at a position overlapping the retainer. In Claim 1 or 2, the air bag module is arranged so as to extend in the left-right width direction of the seat cushion lower member,
The occupant restraint device, wherein the fixing means is disposed on both left and right sides of the seal member. The seal member according to any one of claims 1 to 3, wherein the seal member is adjacent to the flange portion and extends in a direction opposite to the flange portion with the circumferential groove provided around the seal member and the circumferential groove interposed therebetween. And the existing torso,
The inner peripheral edge of the opening is engaged with the circular groove,
The diameter of the sealing member at the groove bottom surface of the circumferential groove is larger than the inner diameter of the opening, and the groove bottom surface of the circumferential groove is in close contact with the inner periphery of the opening. Restraint device. The harness according to any one of claims 1 to 4 , wherein the harness is inserted through a protective sheath,
An occupant restraint device, wherein at least a part of the protective sheath is in close contact with the seal member. 6. The occupant restraint device according to claim 5 , wherein a groove extending in a circumferential direction or a spiral direction is provided on the outer peripheral surface of the protective sheath, and the seal member is in close contact with the inner surface of the groove.

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