JPH1086722A - Vehicular seat provide with air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a means for connecting a force cloth to regulate the elongation of a seat cove in the development of an air bag to a back frame in a seat for a vehicle provided with an air bag device for a side collision of a type in which the sewing part of the seat cover covering the seat side is broken by an expansion force to develop the air bag. SOLUTION: One cover body 13a of a seat cover 13 is connected through a force cloth 15 to a wire 11c of a back frame to regulate the elongation of the cover body 13a, prevent an air bag from a delay in the development caused by the elongation of the seat cover 13 and quickly develop the air bag 22. Then, a means for connecting the force cloth to the wire 11c side is constituted from a hook member 16 fixed to the other end of the force cloth, a latch port provided in the hook member 16 and a latch projection provided in a wire 11 to fit in the latch port part of the hook member 16 and latch the hook member 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with an airbag device which operates when a large impact is applied to a side portion of a vehicle from outside to ensure the safety of an occupant, that is, an airbag device for a side collision. Vehicle seats.

[0002]

2. Description of the Related Art As one type of a vehicle seat provided with an airbag device for a side collision, as shown in Japanese Patent Application Laid-Open No. 4-356246, it is provided on a side portion of a seatbag on a vehicle inner wall side. There is a vehicle seat in which the airbag device is housed in the housing space.

[0003] The airbag device accommodated in the vehicle seat includes a casing accommodated in an accommodation space provided on a side portion of the seatback and fixed to a back frame.
The airbag system includes an inflator housed in a casing, an airbag housed in the casing and deployed by an explosion of the inflator, and an airbag lid covering an opening of the casing. The airbag lid is rotatably attached to the edge of the casing opening at its base end so as to be rotatable outward, covers the opening of the casing, and is inflated by the inflation force of the airbag due to the explosion of the inflator. The airbag rotates outward by a predetermined amount and functions to allow the airbag to expand outward.

[0004] In this airbag device, the means for fixing the airbag lid to the casing is unknown, but as a fixing means, the rotating end of the airbag lid is temporarily hooked to the edge of the opening of the casing. When the locking means is employed, it is difficult to set the rotation load of the airbag grid to a predetermined value, and it is not easy to manage the deployment load of the airbag to a predetermined value. Further, in a state where the airbag device is housed and fixed to the side of the seat back, the outer surface of the airbag lid is exposed to the outside, so that the external appearance of the seat is impaired and the hooking state of the airbag lid to the casing is reduced. There is a possibility that there is a mischief of releasing and rotating the air bag grid by hand to open the casing.

Therefore, in the vehicle seat,
By changing the airbag grid of the airbag device to a simple lid, one end of the lid is rotatably attached to the opening edge of the casing, and the lid is covered with a seat cover constituting a seatback. In addition, the exposure of the airbag device to the outside can be prevented, and the cover can cover the opening of the casing by the covering action of the seat cover. FIG. 7 shows a vehicle seat having such a configuration.

[0006]

In a vehicle seat provided with an airbag device shown in FIG. 7, when an airbag 2a constituting the airbag device 2 housed in a side portion of the seatback is activated. Turns the lid 2c, which covers the opening of the airbag case 2b, outward by the inflation force, breaks the seam portion of the stitched portion 1c of the two cover bodies 1a, 1b in the seat cover 1, and breaks the outer side. Will be developed. Therefore, in this case, the setting of the breaking strength of the sewn portion 1c of the seat cover 1 is an important factor.

However, the seat cover 1 is generally formed of a skin material having elasticity. In the vehicle seat having the above structure, when the airbag 2a is deployed, the seat cover 1 is attached to the airbag 2a. As shown by the two-dot chain line in FIG. 7, it expands and bulges outward due to the expansion force, and the breakage of the stitched portion of the seam 1 c of the seat cover 1 is delayed.

In order to cope with this, the applicant of the present invention has proposed that the above-mentioned vehicle seat be replaced with a cover cloth 1a having a predetermined width and having one end fixed to the cover body 1a. A vehicle seat connected to a component of the back frame 3 of the seat back via a tension member is proposed in Japanese Patent Application No. 7-238318.

In the vehicle seat, the extension of the seat cover 1 when the airbag 2a is deployed is regulated by the action of the webbing, and the inflation force of the airbag 2a directly acts on the stitched portion 1c of the seat cover 1. In addition, the stitch portion of the stitched portion 1c is quickly broken, and the delay of the deployment of the airbag 2a due to the delay of the break of the stitch portion is eliminated.

[0010] It is an object of the present invention to provide a vehicle seat in which the tension member is easily connected to a constituent member of a back frame and has a sufficient connection strength against a tensile force acting on a connection portion. Accordingly, it is an object of the present invention to prevent the pulling member from separating from the constituent member and from being displaced from the connecting portion.

[0011]

SUMMARY OF THE INVENTION According to the present invention, an airbag device is accommodated in an accommodation space provided on a side of an inner wall side of a vehicle in a seatback, and an opening of the accommodation space is formed in the seatback. When the airbag device is operated, the seam portion of the two cover bodies constituting the side portion of the seat cover is broken and the airbag constituting the airbag device is closed. In the vehicle seat to be deployed to one side, one of the two cover bodies is connected to a constituent member of the back frame of the seat back via a tension member having one end fixed to the cover body, A hook member fixing the connecting means between the tension member and the component member to the other end side of the tension member; a hook portion provided on the hook member; and a hook port of the hook member provided on the component member. Department It is characterized in that is constituted by a hooking protrusion which fitted latching the same hook member.

In the vehicle seat, the tension member is formed of webbing having a predetermined width and is fixed to the vicinity of the stitching portion of the one cover body, and the hook member is formed of synthetic resin. It is preferable to fix to the other end side of the tension member.

In the vehicle seat, the airbag device includes an airbag case that houses the airbag and an inflator for deploying the airbag, and a cover that covers an opening of the airbag case. Is preferably opened by the inflation force of the airbag, and the seam of the two covers forming the side portions of the seat cover is broken by the opening force of the lid.

[0014]

In the vehicle seat provided with the airbag device configured as described above, when the airbag is inflated by the operation of the airbag device and the seat cover is pressed, one of the seat covers constituting the seat cover is formed. Since the cover body is connected to the constituent members of the back frame via the tension member, the extension to the outside is restricted, and the inflation force of the airbag directly acts on the seam portion of the seat cover, and the seam portion of the seam portion is formed. Destroy. For this reason, the airbag is instantaneously deployed to the side of the seat back in response to the operation of the airbag device, thereby exhibiting the function of the airbag.

As described above, in the vehicle seat, when the airbag device is operated, the seam portion of the sewn portion of the seat cover is reliably broken by the inflation force of the airbag, and the airbag is deployed to the outside. Therefore, in order to set the correct deployment timing of the airbag, it is only necessary to strictly manage the sewing thread for sewing both cover bodies of the seat cover, and the elasticity of the skin material, which is the material of the seat cover, In addition, it is not necessary to control the strength, the inflation output of the airbag, and the like so strictly, and the number of management steps can be reduced. Also, the skin material, which is the material of the seat cover, is not so limited and has a high degree of freedom, and it is possible to arbitrarily select and use a seat cover having various characteristics.

Incidentally, in the vehicle seat,
A connecting means for connecting one of the cover members constituting the seat cover to the constituent member of the back frame of the seat back is fixed to the other end side of the tensile member, and is hooked to the constituent member. A hook member provided on the hook member, and a hook projection provided on the component member for engaging the hook member on the hook member and hooking the hook member. ing.

Therefore, in order to connect the tension member to the constituent member of the back frame, the hook member fixed to the tension member may be hooked on the same member, and the hook member is hooked so that the cover body can be connected. It can be easily and quickly connected to the components. Further, when the hook member is hooked on the same component, the hook opening provided on the hook member is hooked on the hook projection provided on the same component, so that the connection of the cover body to the same component is prevented. In this case, the positioning of the hook member with respect to the same component is reliably performed, and the deformation of the connecting portion with respect to the same component due to the tensile force is restricted, so that the hook member has a sufficient connection strength, and the tension member is separated from the same component. Is prevented, and the displacement from the connection site is prevented.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 shows a vehicle seat provided with an airbag device according to an example of the present invention. As shown in FIGS. 1 to 3, the vehicle seat includes an airbag device 20 housed in a housing space provided on a side portion of the seatback 10, and the airbag device 20 includes the seatback 10. It is covered with the seat cover 13 which constitutes.

In the vehicle seat, the seat back 10 includes a back frame 11, a cushion pad 12 supported by the back frame 11, a seat cover 13 for integrally covering both, and a cover for covering the back of the back frame 11. The back board 14 is configured.

As shown in FIG. 4, the back frame 11 includes a mounting bracket 11b and a first wire 11c on the left side of a gate-shaped frame body 11a, and a left side of the back of the frame body 11a. The portion is provided with a second wire 11d. The back frame 11 forms an accommodation space where the mounting bracket 11b and the first wire 11c are exposed when the cushion pad 12 is supported. The airbag device 20 is fixed to the frame body 11a and the mounting bracket 11b on the left side of the back frame 11, and is housed in the housing space.

As shown in FIGS. 2 to 4, the airbag device 20 includes an inflator 21 and an airbag 22 connected to the inflator 21. These two members 21 and 22 are housed in a box 23a of a case 23. It is covered with the lid 23b. In this state, the airbag device 20 is mounted on the case 23 by the frame main body 11 a of the back frame 11.
And the mounting bracket 11b. The airbag 22 is accommodated in a box 23a of the case 23 in a folded state.

In the case 23 of the airbag device 20, the case 23a and the cover 23b are formed separately, and the cover 23b is formed at the base end of the left opening of the case 23a. It is fixed to the edge portion, and is configured to easily rotate outward around the base end portion by expansion force from the inside.

The airbag device 20 includes a side portion of a vehicle,
For example, when a side impact is detected by an impact detection sensor disposed on a vehicle door, the control device operates based on the detection signal of the impact detection sensor to output an explosion signal, and based on the explosion signal, the inflator 21 detonates. Airbag 2
Let 2 bulge. The airbag 22 functions to rotate the lid 23b of the case 23 with the inflation output and deploy the lid 23b outward.

Thus, in the vehicle seat,
The first and second cover members 1 each having two side portions of the seat cover 13.
3a and 13b. These two cover bodies 1
3a and 13b are sewn to each other at a terminal portion, and the first cover body 13a is sewn to the terminal of a third cover body 13c constituting the front part of the seat cover 13 at the terminal, and The cover 13b is connected to the hook 13d sewn to the terminal at the second end of the back frame 11 at the terminal.
By hooking on the wire 11d, the back frame 1
Connected to 1.

In the seat cover 13, the first and second
The sutures used for the sewn portions P1 of the cover members 13a and 13b include the sewn portions P of the first and third cover members 13a and 13c.
2, and those having a smaller tensile strength than those used in the seam used for the seam of the cover body constituting a portion other than the side portion of the seat cover 13 are employed. This allows
The suturing portion P1 of the first and second cover bodies 13a and 13b is configured as an easily breakable portion.

On the other hand, the first cover body 13a constituting the seat cover 13 is made of a cotton cloth having a predetermined width and a predetermined length.
Two webbings 15 are stitched in two stages in the vertical direction of the seat back 10. As shown in FIGS. 5 and 6, the webbing 15 has a hook member 16 made of synthetic resin sewn on one end, and is close to the sewn portion P1 of the first cover body 13a on the other end. The hook member 16
Is hooked on the first wire 11 c of the back frame 11 to connect the webbing 15 to the back frame 11.

The first wire 11c is, as shown in FIG.
It is formed by bending one wire, and has two portals 11c1 and 11c2 in the longitudinal direction.
The ends of 1c1 and 11c2 are welded to the side of the frame body 11a. In addition, locking projections 11c3, 11c4 formed to be bent toward the frame main body 11a are provided at central portions in the longitudinal direction of the gate-shaped portions 11c1, 11c2.

On the other hand, the hook members 16 sewn to the webbings 15 are of substantially the same width as the webbings 15 and, as shown in FIGS. 16b. Hook port 1 of each hook member 16
6b is each hooking projection 11c of the first wire 11c.
3 and 11c4, each hook member 16 being the first
When hooked on the wire 11c, each hooking projection 11c3, 1
1c4.

In the vehicle seat thus configured, the airbag device 20 is accommodated in the accommodation space on the side of the seatback 10 in the state shown in FIG. Based on the detection signal, the inflator 21 of the airbag device 20 detonates and inflates the airbag 22. The inflated airbag 22 pivots the lid 23b of the case 23 outward to break the suturing portion P1, which is an easily breakable portion on the side of the seat cover 13, and as shown in FIG. The second cover members 13a, 13b are extended to the outside from between the terminal portions to protect the occupant of the seat.

Thus, in the vehicle seat,
When the airbag 22 inflates and presses the seat cover 13, the first cover body 13 a constituting the seat cover 13 is connected to the first wire 11 of the back frame 11 via the webbing 15.
c, the extension of the first cover body 13a to the outside is restricted. Therefore, the inflation force of the airbag directly acts on the stitched portion P1 of the seat cover 13 to break the stitched portion of the stitched portion P1. As a result, the airbag 22
Is the seat back 10 according to the operation of the airbag device 20.
The airbag 22 is instantaneously deployed to the side of the airbag 22 to exhibit the function of the airbag 22.

As described above, in the vehicle seat, when the airbag device 20 is operated, the airbag 22
The seam portion of the seam portion P1 of the seat cover 13 is rapidly broken by the inflation output of the airbag 22, and the airbag 22 is deployed to the outside. Both cover bodies 13 of seat cover 13
It is only necessary to strictly control the sewing thread for suturing a and 13b, and it is not necessary to control the elasticity and strength of the skin material, which is the material of the seat cover 13, and the swelling pressure of the airbag 22, so much. Management man-hours can be reduced. Also, the skin material, which is the material of the seat cover 11, is not so limited and has a high degree of freedom, and a seat cover having various characteristics can be arbitrarily selected and used.

Incidentally, in the vehicle seat,
The connecting means to the first wire 11a of the webbing 15 for connecting the first cover body 13a constituting the seat cover 13 to the first wire 11a of the back frame 11 is sewn to the other end side of the webbing 15 and A hook member 16 hooked on the first wire 11c, a hook opening 16b provided on the hook member 16, and a hook member 1 provided on the first wire 11c.
The hook projections 11c3 and 11c4 engage with the hook opening 16b of the hook 6 and hook the hook member 16.

Therefore, in order to connect the webbing 15 to the first wire 11c, the hook member 16 sewn to the webbing 15 may be hooked on the first wire 11c. , The first cover body 13a is connected to the first wire 1.
1c can be easily and quickly connected.

The hook member 16 is connected to the first wire 11c.
Hook portion 16b provided in the hook member 16
Are hooking projections 11c3, 11 provided on the first wire 11c.
When the first cover body 13a is connected to the first wire 11c, the hook member 16 is securely positioned with respect to the first wire 11c.
The connection portion to the wire 11c has a sufficient connection strength to the tensile force, and the first wire 1
Detachment from 1c is prevented, and displacement from the connection site is prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of a vehicle seat provided with an airbag device according to an example of the present invention.

FIG. 2 is a partial cross-sectional view taken along line 2-2 of FIG. 1 when the airbag of the vehicle seat is not deployed.

FIG. 3 is a partial cross-sectional view corresponding to FIG. 2 when the vehicle seat is deployed with an airbag.

FIG. 4 is a partial perspective view showing an attached state of the airbag device to a back frame constituting the vehicle seat.

FIG. 5 is an enlarged partial perspective view showing a connecting portion of the webbing constituting the vehicle seat to a back frame.

FIG. 6 is a plan view schematically showing a connected state of the webbing.

FIG. 7 is a plan view corresponding to FIG. 2 of a conventional vehicle seat provided with an airbag device.

[Explanation of symbols]

10: seat back, 11: back frame, 11a ...
Frame body, 11b mounting bracket, 11c first
Wire, 11c1, 11c2 ... portal part, 11c3, 11c4
... Hanging projections, 11d ... Second wire, 12 ... Cushion pads, 13 ... Seat covers, 13a, 13b, 13c
... Cover body, 13d ... Hook, 14 ... Backboard, 1
5 ... power cloth, 16 ... hook member, 16a ... hook body, 1
6b: hook opening, 20: airbag device, 21: inflator, 22: airbag, 23: case, 23a: box, 23b: lid, P1, P2: sewn portion.

Claims (3)

[Claims] An airbag device is accommodated in an accommodation space provided on a side of a vehicle interior wall side of a seatback, and an opening of the accommodation space is covered by a side of a seat cover constituting the seatback. In the vehicle seat, when the airbag device is operated, a seam portion of the two cover bodies constituting the side portion of the seat cover is broken to deploy the airbag constituting the airbag device to the side. One of the two cover members is connected to a constituent member of the back frame of the seat back via a tensile member having one end fixed to the cover member, and means for connecting the tensile member and the constituent member. A hook member fixed to the other end of the tension member, a hook provided on the hook member, and a hook provided on the component member and fitted to the hook of the hook member. Hang members Vehicle seat provided with an airbag apparatus characterized by being configured by the hooking protrusions for. 2. The vehicle seat according to claim 1, wherein
The tension member is formed of a webbing having a predetermined width and is fixed in the vicinity of a sewn portion of the one cover body, and the hook member is formed of a synthetic resin and fixed to the other end of the tension member. A vehicle seat provided with an airbag device, characterized in that: 3. The vehicle seat according to claim 1, wherein
The airbag device includes an airbag case that houses the airbag and an inflator that deploys the airbag, and opens a lid that covers an opening of the airbag case with an inflation output of the airbag. A vehicle seat provided with an airbag device, wherein a seam of both cover bodies constituting side portions of the seat cover is broken by an opening force of the lid body.