JP2020132086A - Vehicle seat - Google Patents

Abstract

To maintain strength of a seat frame and improve flexibility of arrangement of webbing and a fixing member in a vehicle seat including an airbag module.SOLUTION: A vehicle seat 1 includes: an airbag module 5 fixed to a seat frame 11; first webbing 30 and second webbing 31 which enclose the airbag module 5 with the seat frame 11 and guide an inflating airbag 6 to an airbag outlet 20 on a seat surface; a first fixing member 32 which fixes an end part, located at the opposite side of the airbag outlet side, of the first webbing 30; and a second fixing member 33 which fixes an end part, located at the opposite side of the airbag outlet side, of the second webbing 31. The first fixing member 32 has a holding part 34, which holds an edge part 15 in such a way so as to be movable along the edge part 15 of the seat frame 11, and is attached to the seat frame 11 by the holding part 34. The second fixing member 33 is mechanically coupled to the first fixing member 32.SELECTED DRAWING: Figure 4

Description

The present invention relates to a vehicle seat including an airbag module.

Vehicle seats with airbag modules are known. The airbag module is used to protect the occupant in the event of a vehicle collision, and is arranged, for example, on the side of the seat on the door side. When the airbag module is activated, the airbag housed inside is inflated, and the inflated airbag breaks the seat pad and the seat cover and pops out of the seat.

For the airbag module to function properly, it is essential that the airbag pop out from the airbag outlet provided at a predetermined portion of the seat. For this reason, a force cloth that connects the airbag module and the airbag outlet and guides the inflating airbag to the airbag outlet is provided inside the seat. The force cloth is typically placed between the seat cover and the seat pad, and the ends of the force cloth are fixed to the seat frame via a fixing member. The fixing member is usually fixed to the seat frame using bolts (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2008-37261

Even if the seat frames are the same type of vehicle seats, the arrangement of airbag modules may differ depending on the specifications of each region, for example. It is desirable that the arrangement of the force cloth connecting the airbag module and the airbag outlet and the arrangement of the fixing member for fixing the end of the force cloth to the seat frame are also changed according to the arrangement of the airbag module. For example, the arrangement of the force cloth and the fixing member can be changed by providing a plurality of bolt holes in the seat frame and selectively using the bolt holes according to the arrangement of the force cloth and the fixing member. However, there is a concern that the strength of the seat frame may decrease due to the provision of a plurality of bolt holes, and if the number of bolt holes is reduced in order to suppress the decrease in strength, the force cloth and the fixing member may be arranged. The degree of freedom is limited.

The present invention has been made in view of the above circumstances, and an object of the present invention is to maintain the strength of the seat frame and increase the degree of freedom in arranging the force cloth and the fixing member in the vehicle seat provided with the airbag module. ..

The vehicle seat of one aspect of the present invention is a first force that surrounds the airbag module fixed to the seat frame and the airbag module together with the seat frame, and guides the inflatable airbag to the airbag outlet on the seat surface. The cloth and the second force cloth, the first fixing member for fixing the end portion of the first force cloth on the side opposite to the airbag outlet side, and the side of the second force cloth opposite to the airbag outlet side. The first fixing member includes a second fixing member for fixing the end portion of the seat frame, and the first fixing member has a holding portion for holding the edge portion so as to be movable along the edge portion of the seat frame. It is attached to the seat frame, and the second fixing member is mechanically coupled to the first fixing member.

According to the present invention, in a vehicle seat provided with an airbag module, the strength of the seat frame can be maintained and the degree of freedom in arranging the force cloth and the fixing member can be increased.

It is a perspective view of an example of a vehicle seat for demonstrating the embodiment of this invention. It is a perspective view of the internal structure of a vehicle seat around an airbag module. It is an exploded perspective view of the internal structure of a vehicle seat around an airbag module. It is sectional drawing of the vehicle seat around the airbag module. It is a perspective view of the 1st fixing member which fixes the 1st force cloth. It is sectional drawing of the 1st fixing member. It is a perspective view of the 2nd fixing member which fixes a 2nd force cloth. It is a perspective view of the combined state of the 1st fixing member and the 2nd fixing member.

FIG. 1 shows an example of a vehicle seat for explaining an embodiment of the present invention.

The vehicle seat 1 is a seat installed in a vehicle such as an automobile, and is a seat cushion 2 that supports the buttocks and thighs of an occupant seated on the seat 1, and a seat back 3 that supports the waist and back of the occupant. A headrest 4 that supports the occupant's head and an airbag module 5 are provided. In this example, the airbag module 5 is arranged on the side of the seat back 3 opposite to the vehicle door side.

When the airbag module 5 is activated, the airbag 6 is deployed to the side of the seat back 3 and the headrest 4, and the occupant seated on the vehicle seat 1 and the other adjacent to the vehicle seat 1 are installed. Prevents collision with occupants seated in the seat. The airbag of the airbag module arranged on the side of the seat back 3 on the vehicle door side is generally deployed on the side of the seat back 3, whereas the airbag 6 extends to the side of the headrest 4. .. The airbag 6 extending to the side of the headrest 4 can protect the head of the occupant seated on the vehicle seat 1.

2 to 4 show the internal structure of the vehicle seat 1 around the airbag module.

The seat back 3 has a seat frame 10 that forms the skeleton of the seat back 3. The seat frame 10 includes a pair of backside frames 11 that are arranged at intervals in the seat width direction and extend in the vertical direction of the seat, and an upper frame 12 that connects the upper ends of the backside frames 11. The seat frame 10 is covered with a cushion pad 13 made of a relatively soft resin foam material such as urethane foam, and further covered with a trim cover 14 made of a skin material such as leather, woven fabric, or non-woven fabric.

The airbag module 5 is fixed to a backside frame 11 located on the side opposite to the vehicle door side. The airbag module 5 is covered with a cushion pad 13 and a trim cover 14, and is built in the seat back 3.

The airbag module 5 has an airbag 6 (see FIG. 1) and an inflator 7 that inflates the airbag 6. In the airbag module 5 in which the airbag 6 is also deployed to the side of the headrest 4, the airbag 6 is housed in the upper part of the airbag module 5 and is arranged near the upper end of the backside frame 11, and the inflator 7 The gas outlet 8 of the above is also arranged near the upper end portion of the backside frame 11. If necessary, a bracket for fixing the upper portion of the airbag module 5 to the upper frame 12 may be provided.

The trim cover 14 has an easily broken portion 20 that serves as an airbag outlet. The easily broken portion 20 is a sutured portion in which a plurality of skin materials are sewn together. The cushion pad 13 is provided with a slit 21 leading from the airbag module 5 to the easily broken portion 20.

The vehicle is equipped with an acceleration sensor that detects a vehicle collision and an ECU (Electronic Control Unit) that determines whether or not the inflator 7 needs to be operated based on a signal output from the acceleration sensor. 7 is operated, and the airbag 6 is inflated by the gas generated by the operated inflator 7. The expanded airbag 6 reaches the easily broken portion 20 through the slit 21, and breaks the easily broken portion 20 by the expansion pressure. Then, the airbag 6 pops out of the seat back 3 through the broken easily broken portion 20.

The vehicle seat 1 includes the first force cloth 30 and the second force cloth 31 that guide the inflatable airbag 6 to the easily breakable portion 20, and the end portion of the first force cloth 30 on the side opposite to the easily breakable portion 20 side. A first fixing member 32 for fixing the cloth 31 and a second fixing member 33 for fixing the end portion of the second force cloth 31 on the side opposite to the easily broken portion 20 side are further provided.

The first force cloth 30 and the second force cloth 31 are made of a material having poor elasticity, and are, for example, a woven fabric or a non-woven fabric using polyester fibers or polyamide fibers. The tips of the first force cloth 30 and the second force cloth 31 on the easily breakable portion 20 side are co-sewn together with the skin material forming the trim cover 14 and the easily breakable portion 20, and the airbag module is passed through the slit 21. It is drawn up to 5.

The first force cloth 30 and the second force cloth 31 drawn up to the airbag module 5 are divided into two parts, and surround the airbag module 5 together with the backside frame 11. The base end portion of the first force cloth 30 opposite to the easily breakable portion 20 side is locked to the first fixing member 32, and the base end portion of the second force cloth 31 opposite to the easily breakable portion 20 side is It is locked to the second fixing member 33, and the base end portions of the first force cloth 30 and the second force cloth 31 are attached to the backside frame 11 via the first fixing member 32 and the second fixing member 33. It is fixed.

The first fixing member 32 has a holding portion 34 for holding the edge portion 15 of the backside frame 11 and a support plate portion 35 in contact with the wall portion 16 of the backside frame 11. The wall portion 16 of the backside frame 11 is bent with respect to the edge portion 15 and extends along the edge portion 15. The holding portion 34 is formed in a J-shaped cross section, and at least the tip portion of the edge portion 15 is sandwiched in the thickness direction. As a result, the first fixing member 32 is attached to the back side frame 11. Further, the holding portion 34 holding the edge portion 15 and the support plate portion 35 in contact with the wall portion 16 sandwich the edge portion 15 in the width direction. As a result, the mounting strength of the first fixing member 32 is increased, and the mounting posture is stabilized.

The second fixing member 33 is mechanically coupled to the first fixing member 32 and attached to the backside frame 11 via the first fixing member 32. The first fixing member 32 has a fastening portion 36, and the second fixing member 33 has a fastening portion 37. The fastening portions 36 and 37 have through holes 38 that are overlapped with each other and communicate with each other in a stacked state, and are fastened by a fastener 39 inserted through the through holes 38. The fastener 39 is, for example, a resin clip.

5 and 6 show a first fixing member 32, FIG. 7 shows a second fixing member 33, and FIG. 8 shows a state in which the first fixing member 32 and the second fixing member 33 are connected.

The first fixing member 32 has a core metal 40 made of a metal material such as steel and a coating 41 covering the core metal 40, and the coating 41 is made of an elastic material such as an elastomer. The second fixing member 33 also has a core metal and a coating. The holding portion 34 is integrally formed with the coating 41, and is made of an elastic material forming the coating 41.

The holding portion 34 made of an elastic material can move along the edge portion 15 while being elastically deformed according to the shape of the edge portion 15 of the backside frame 11, and can hold each portion of the edge portion 15. As a result, the first fixing member 32 is arranged, the second fixing member 33 attached to the back side frame 11 via the first fixing member 32 is arranged, and the first fixing member 32 and the second fixing member 33 are fixed. The degree of freedom in arranging the first force cloth 30 and the second force cloth 31 is increased.

Preferably, the first force cloth 30, the second force cloth 31, and the first fixing member 32 and the second fixing member 33 are the airbag module 5 around the gas outlet 8 of the inflator 7, as shown in FIG. It is arranged so as to surround. Immediately after the start of expansion of the airbag 6, the expansion pressure of the airbag 6 rapidly increases around the gas outlet 8, but the first force cloth 30 and the second force cloth 31 are arranged around the gas outlet 8. As a result, the expansion pressure of the airbag 6 can be reliably received by the first force cloth 30 and the second force cloth 31, and the airbag 6 can be smoothly guided to the easily broken portion 20 which is the outlet of the airbag.

Further, the first fixing member 32 has an engaging portion 42, and the second fixing member 33 has an engaging portion 43 that engages with the engaging portion 42. The engaging portions 42 and 43 are each formed in a J-shaped cross section, and the first force cloth 30 and the second force cloth 31 are engaged in the circumferential direction surrounding the airbag module 5. As a result, when the first force cloth 30 and the second force cloth 31 receive the expansion pressure of the airbag 6, they act on the fastener 39 that connects the first fixing member 32 and the second fixing member 33. Shear force F can be reduced. Therefore, the first fixing member 32 and the second fixing member 33 can be connected by a simple method of using a resin clip as the fastener 39 and pressing the resin clip into the through holes 38 of the overlapped fastening portions 36 and 37.

Preferably, the engaging portions 42 of the first fixing member 32 are provided in pairs with the fastening portion 36 of the first fixing member 32 interposed therebetween, and the engaging portions 43 of the second fixing member 33 are engaged with the second fixing member 33. A pair is provided with the portion 37 interposed therebetween. As a result, the relative rotation between the first fixing member 32 and the second fixing member 33 with one engaging portion 42, 43 as a fulcrum can be prevented by the other engaging portion 42, 43, and the shear acting on the fastener 39. The force can be further reduced.

The configuration of the vehicle seat 1 described above can also be applied to a vehicle seat other than a vehicle such as a ship or an aircraft.

As described above, the vehicle seat disclosed in the present specification includes an airbag module fixed to the seat frame and an airbag that surrounds the airbag module together with the seat frame and expands the airbag on the surface of the seat. The first force cloth and the second force cloth that guide the outlet, the first fixing member that fixes the end portion of the first force cloth on the side opposite to the airbag outlet side, and the air of the second force cloth. A second fixing member for fixing the end portion on the side opposite to the bag outlet side is provided, and the first fixing member has a holding portion for holding the edge portion so as to be movable along the edge portion of the seat frame. It has and is attached to the seat frame by the holding portion, and the second fixing member is mechanically coupled to the first fixing member.

Further, in the vehicle sheet disclosed in the present specification, the first fixing member and the second fixing member each have a core metal and a coating made of an elastic material and covering the core metal. The holding portion is integrally formed with the coating by the elastic material.

Further, in the vehicle seat disclosed in the present specification, the holding portion is formed in a J-shaped cross section, and at least the tip portion of the edge portion is sandwiched in the thickness direction of the edge portion.

Further, in the vehicle seat disclosed in the present specification, the seat frame has a wall portion in which the seat frame is folded with respect to the edge portion and extends along the edge portion, and the first fixing member is It has a support plate portion in contact with the wall portion, and the edge portion is sandwiched between the holding portion and the support plate portion in the width direction of the edge portion.

Further, the vehicle seat disclosed in the present specification has an engaging portion in which the first fixing member and the second fixing member are engaged with each other, and the engaging portion is the first force cloth. And the second force cloth is engaged in the circumferential direction surrounding the airbag module.

1 Vehicle seat 2 Seat cushion 3 Seat back 4 Headrest 5 Air bag module 6 Air bag 7 Inflator 8 Gas outlet 10 Seat frame 11 Back side frame 11 Seat frame 12 Upper frame 13 Cushion pad 14 Trim cover 15 Edge 16 Wall 20 Easy break (airbag outlet)
21 Slit 30 1st force cloth 31 2nd force cloth 32 1st fixing member 33 2nd fixing member 34 Holding part 35 Support plate part 36 Fastening part 37 Fastening part 38 Through hole 39 Fastener 40 Core metal 41 Cover 42 Engaging part 43 Engagement part

Claims (5)

The airbag module fixed to the seat frame and
A first force cloth and a second force cloth that surround the airbag module together with the seat frame and guide the inflatable airbag to the airbag outlet on the seat surface.
A first fixing member for fixing the end of the first force cloth on the side opposite to the airbag outlet side,
A second fixing member for fixing the end of the second force cloth on the side opposite to the airbag outlet side,
With
The first fixing member has a holding portion for holding the edge portion so as to be movable along the edge portion of the seat frame, and is attached to the seat frame by the holding portion.
The second fixing member is a vehicle seat that is mechanically coupled to the first fixing member. The vehicle seat according to claim 1.
The first fixing member and the second fixing member
With the core metal
The coating made of elastic material and covering the core metal
Have each
The holding portion is a vehicle sheet formed integrally with the coating by the elastic material. The vehicle seat according to claim 2.
The holding portion is formed in a J-shaped cross section, and is a vehicle seat that sandwiches at least the tip portion of the edge portion in the thickness direction of the edge portion. The vehicle seat according to claim 3.
The seat frame has a wall portion that is folded with respect to the edge portion and extends along the edge portion.
The first fixing member has a support plate portion in contact with the wall portion, and the edge portion is sandwiched between the holding portion and the support plate portion in the width direction of the edge portion. The vehicle seat according to any one of claims 1 to 4.
The first fixing member and the second fixing member each have an engaging portion that engages with each other.
The engaging portion is a vehicle seat in which the first force cloth and the second force cloth are engaged in the circumferential direction surrounding the airbag module.

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