WO2007099765A1

WO2007099765A1 - Occupant restraint device

Info

Publication number: WO2007099765A1
Application number: PCT/JP2007/052583
Authority: WO
Inventors: Hiromichi Yoshikawa; Teruhiko Hiruta
Original assignee: Takata Corporation
Priority date: 2006-03-02
Filing date: 2007-02-14
Publication date: 2007-09-07
Also published as: JP2007230443A; JP4470894B2

Abstract

Provided an occupant restraint device in which water and moisture are prevented from penetrating into an air bag module along the routed-around path of harness. The harness (10h) is drawn out from an air bag module (10) and inserted through the opening (8k) of a seat pan (8). A seal member (50) is fitted onto the harness (10h). The seal member (50) is tightly fitted to the inner periphery and the peripheral edge upper surface of the opening (8k) to prevent water and moisture from penetration.

Description

Specification

Crew restraint system

Field of Invention

TECHNICAL FIELD [0001] The present invention relates to an occupant restraint device for restraining an occupant of a vehicle seat such as an automobile at the time of a collision, and in particular, restrains the occupant's waist during a frontal collision, and the occupant's body is forward and downward. The present invention relates to an occupant restraint device that is configured to prevent movement.

Background of the Invention

[0002] As a system for restraining an automobile occupant at the time of a collision, even if a seat belt is attached, a seat is not provided at the time of a vehicle collision in order to prevent a submarine phenomenon in which the occupant tries to pass through the lower side of the lap belt at the time of a front collision. Japanese Patent Laid-Open No. 2005-126051 describes an occupant restraint device that raises or hardens the front part of the cushion.

[0003] In the occupant restraint device disclosed in the publication, a recessed portion is provided in the front portion of the seat pan, and an air nog is disposed in the recessed portion. In addition, a cover is provided so as to cover the recessed portion, and the rubbing between the air bag and the seat cushion is prevented!

Patent Document 1: JP 2005-126051

[0004] Paragraph 0033 of JP-A-2005-126051 describes that provision of a cover prevents water and foreign matter from entering the recessed portion.

Summary of the Invention

[0005] 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.

[0006] An occupant restraint device according to the present invention is disposed between a seat cushion lower member and a seat cushion, and is inflatable so as to press the seat cushion downward, and the airbag is inflated. An occupant restraint in which a harness connected to the gas generator is pulled out to the lower side of the lower member of the seat cushion through the opening of the lower member of the seat cushion. In the apparatus, a sealing member for sealing between the opening and the harness is provided.

[0007] The sealing member may be fitted into the opening and in close contact with the inner peripheral surface of the opening. [0008] The seal member may be in close contact with the upper surface of the peripheral edge of the opening!

[0009] The harness may be inserted through a protective sheath, and at least a part of the protective sheath may be in close contact with the seal member.

[0010] The outer circumferential surface of the protective sheath may be provided with a groove extending in the circumferential direction or the spiral direction, and the seal member may be in close contact with the inner surface of the groove.

Brief Description of Drawings

FIG. 1 is a perspective view of a seat frame including 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.

3 is a cross-sectional perspective view of a seat pan of the occupant restraint device in FIG. 1. FIG.

4 is a perspective view of an airbag module of the occupant restraint device in FIG. 1. FIG.

FIG. 5 is an exploded view of the airbag module and seat pan of the occupant restraint device of FIG. 1.

FIG. 6 is a cross-sectional view showing a harness routing structure.

FIG. 7 is a perspective view showing a harness.

[Fig. 8] Fig. 8a is a cross-sectional view showing another configuration example of the harness routing portion, and Fig. 8b is a perspective view of the seal member.

FIG. 9a and FIG. 9b are perspective views of other sealing members.

FIG. 10a and FIG. 10b are perspective views of still another sealing member.

FIG. 11 is a cross-sectional view showing yet another harness routing portion.

Detailed description

[0012] In the occupant restraint device of the present invention, since the seal member is provided between the opening of the seat cushion lower member and the harness, water and moisture are prevented from entering along the routing portion of the harness. The

[0013] The seal member may be either fitted into the opening and closely attached to the inner peripheral surface of the opening, or may be adhered to the upper surface of the peripheral edge of the opening. Water and moisture are prevented 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 also, water or moisture enters through the opening. Is prevented.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a seat frame equipped 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 occupant restraint system as viewed from the lower side. Fig. 5 is an exploded view of the airbag module and the seat pan. FIG. 6 is a cross-sectional view showing the harness routing structure, and FIG. 7 is a perspective view showing the harness.

[0016] A frame constituting a vehicle seat also has a force with 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 top of the back frame 4.

[0017] The base frame 1 has left and right side frames la, lb. A seat pan 8 is installed between the front parts of these side frames la and lb. Side wall portions 8a and 8b are provided upright at both ends in the left-right width direction of the seat pan 8 so as to overlap the inner side surfaces of the side frames la and lb, that is, the side surfaces of the side frames la and lb facing each other. The side frames la, lb and the side wall portions 8a, 8b are respectively provided with bolt penetration holes (not shown) so as to pass through the overlapping portions, and bolts lc are respectively inserted into the holes. The seat pan 8 is fixed between the side frames la and lb by passing the nut 8c into the bolt lc.

Although not shown, a seat cushion and a seat back made of urethane or the like are mounted on 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.

[0020] The airbag module 10 is disposed between the seat pan 8 and the seat cushion in a folded state, and presses the seat cushion from below by introducing gas into the interior. The airbag 12 that inflates like this, the gas generator 14 for inflating the airbag 12, the airbag 12 and the gas generator 14 are connected to each other, and a seat pan is connected by a stud bolt 20 described later. The retainer 16 fixed to 8 and the folded body of the airbag 12 are enclosed so as to restrain the air bag 12 in a folded state. And an enclosure 18. The airbag 12 is arranged so as to extend in the left-right width direction of the seat pan 8, that is, in the vehicle width direction. The tip of harness 1 Oh is connected to gas generator 14. The harness 10h is routed to the lower side of the seat pan through the opening 8k of the seat pan 8.

In this embodiment, an airbag module housing portion 8d (FIG. 3) is formed on the upper surface of the seat pan 8 by a concave step portion that is one step lower by the height of the airbag module 10. The airbag module 10 is installed in the housing portion 8d.

[0022] In this embodiment, the retainer 16 is a plate-like member 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) drilled 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 passed through a bolt insertion hole 8e (FIGS. 3 and 5) formed in the bottom surface of the airbag module housing portion 8d. Then, the nut 26 is fastened to the stud bolt 20 from the lower side of the seat pan 8, whereby 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 so that the axial center line direction thereof is the left-right width direction of the seat pan 8. The bracket 30 is provided with a C-shaped band portion 30a that protrudes from a front edge (an edge portion on the front side of the vehicle) of the retainer 16 and is bent on the upper surface side of the retainer 16 so as to be bent in a substantially C shape. The front end side of the letter-shaped band portion 30 a also has a flange portion 30 b extending so as to overlap the upper surface of the retainer 16. The stud bolt 20 protrudes downward from the lower surface side of the flange portion 30b, extends through the retainer 16, and extends downward from the retainer 16. [0026] The gas generator 14 is inserted inside the C-shaped band portion 30a, and then the nut 24 is fastened to the stud bolt 20 to clamp the flange portion 30b and the retainer 16, thereby the gas generator 14 Is fixed to the retainer 16.

[0027] In this embodiment, the envelope body 18 has a bag shape that encloses the entire folded body of the airbag 12, as shown in FIG.

[0028] As described above, the harness 10h 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 8k 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 passed through a noise passage hole (reference numeral omitted) provided near the middle of the bolt hole through which the stud bolt 20 is passed on the lower surface of the airbag 12. The bag 12 is pulled out.

[0030] As shown in FIG. 3, the bottom surface of the seat pan 8 (the bottom surface of the airbag module 8d accommodating portion) overlaps with the bolt through holes and harness through holes on the bottom surface of the airbag 12. The bolt hole 8e and the noise hole 8k are arranged in a matching positional relationship. That is, two bolt through holes 8e are provided at an interval in the left-right width direction of the seat pan 8, and a harness through hole 8k is provided near the middle between these bolt through holes 8e, 8e. Is provided.

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. Connected.

[0032] A seal member (a rubber bushing in this embodiment) 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 with the circumferential groove 52 interposed therebetween. 53 and a harness through hole 54 penetrating from the flange 51 side to the body 52 side. The harness 10h is passed through the harness through hole 54. The seal member 50 is provided with a slit in the seal member 50 that may be fitted on the harness 1 Oh before attaching one connector 10a or 10b to the harness 10h. Push It can be opened and attached to the harness lOh! /.

As shown in FIGS. 3 and 5, the peripheral edge of the opening 8k through which the harness 10h is passed is a low place 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 attached to 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 place 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.

[0034] In order to assemble this occupant restraint device to the seat pan 8, the airbag module 10 is connected to the retainer 16 before the airbag 12 and the gas generator 14 are connected to the seat pan 8, respectively. The airbag 12 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.

[0035] 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 storage portion 8 d of the seat pan 8. At this time, the harness 10h is passed through the opening 8k, the seal member 50 is fitted into the opening 8k, and the flange 51 is disposed in the low place 8t. Further, each stud bolt 20 is passed through the corresponding bolt insertion hole 8e, and the nut 26 is tightened into the stud bolt 20. As a result, the airbag module 10 is fixed to the seat pan 8.

[0037] 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 lower portion 8t, and 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 as described above. This prevents water and moisture from entering the airbag module 10 through the opening 8k.

[0039] In this embodiment, the airbag module 10 is fixed to the seat pan 8 by the stud bolt 20 on both the left and right sides of the seal member 50, so that the seal member 50 is substantially equally left and right. Press against the seat pan 8 and the lower surface of the airbag module 10. Be trained. 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 longitudinal end of the airbag module 10 than the stud bolts 20. In addition, the seal member 50 is located at a position other than the bottom surface of the air bag module 10, particularly at a position that overlaps the bottom surface of the retainer 16 (a position that does not overlap the bottom surface of the retainer 16). It will be placed.

In the above embodiment, the force with which the groove bottom surface of the circumferential groove 52 is also in close contact with the inner circumference of the opening 8k, as shown in FIGS. 8a and 8b, the circumferential groove is omitted, and the flange 51 has a cylindrical body. The sealing member 50A may be used in which the portion 53 is directly connected and the diameter of the trunk portion 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 51 being in close contact with the low 8t.

The seal member 50A shown in FIGS. 8a and 8b may be a seal member 50B and 50C having a square flange portion 51 as shown in FIGS. 9a and 9b. The body may not be cylindrical, but may be non-circular such as a square cylinder as shown in Fig. 9b. This rectangular tube is not limited to a square, and may be a triangle or a polygon more than a pentagon.

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

In the present invention, as shown in FIG. 11, the harness 10h may be threaded through the protective sheath 60, and the protective sheath 60 may be threaded through the harness through hole 54 of the seal member 50F. Further, as the protective sheath 60, a protective sleeve 60 made of a corrugated tube in which spiral or circular grooves 61 are 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 the protrusion 55 is provided around the inner peripheral surface of the harness through hole 54, and the harness through hole 54 passes through the protective sheath 60. In other words, the configuration 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 in the opening 8k and the flange portion 51 is disposed above the opening 8k.

[0046] The flange portion 51 is pressed against the lower portion 8t, and the protrusion 55 comes into close contact with the inner surface of the groove 61, thereby preventing water and moisture from entering through the through hole 54. Groove 61 goes around In the case of a turning groove, the protrusion 55 circulates in a ring shape.

[0047] Each of the above embodiments is an example of the present invention, and the present invention may take forms other than those illustrated. For example, in the above embodiment, the force envelope 18 configured to be pressed against the envelope 18 of the airbag module 10 on the upper surface of the seal member may be omitted, and the airbag may press the seal member.

[0048] 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 sealing member also with an upper force.

[0049] Further, in each of the above-described embodiments, a force is used to connect the air noggles to the retainer and to fix the retainer to the seat pan by a common stud bolt. The air bag is connected to the retainer. There may be a stud bolt for fixing and a stud bolt for fixing the retainer to the seat pan. The means for connecting the airbag to the retainer is not limited to stud bolts and nuts.

[0050] In the above embodiment, the airbag module 10 is disposed above the seat pan 8. A member other than the seat pan is installed between the side frames 8a and 8b, and the airbag module is disposed thereon. Moyo.

[0051] This application is based on a Japanese patent application filed on March 2, 2006 (Japanese Patent Application No. 2006-05 6514), which is incorporated by reference in its entirety.

Claims

The scope of the claims

[1] An airbag that is disposed between a lower member of the seat cushion and the seat cushion and is inflatable so as to press the seat cushion from the lower side;

A gas generator for inflating the airbag;

An occupant restraint device in which a 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;

An occupant restraint device comprising a seal member for sealing between the opening and the harness.

[2] The occupant restraint device according to claim 1, wherein the seal member has a harness insertion hole, and the harness is inserted through the harness insertion hole.

[3] The occupant restraint device according to claim 2, wherein the seal member is fitted into the opening and is tightly attached to the inner peripheral surface of the opening.

[4] The occupant restraint device according to claim 2, wherein the seal member is in close contact with an upper surface of a peripheral portion of the opening.

[5] The occupant restraint device according to claim 4, wherein a circumferential groove is provided on an outer peripheral surface of the seal member, and the circumferential groove and the edge of the opening are engaged.

[6] In Claim 2, the harness is inserted through a protective sheath,

The occupant restraint device, wherein the protective sheath is threaded through the harness insertion hole, and at least a part of the protective sheath is in close contact with the seal member.

[7] The occupant restraint according to claim 6, 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. apparatus.

[8] The occupant restraint device according to claim 7, wherein the seal member is provided with a protrusion on an inner peripheral surface of the harness passage hole, and the protrusion is engaged with the groove.