JP6422305B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat in which an airbag that has jumped out of an airbag device is guided by a blanket inside a skin.

  Conventionally, a vehicle seat disclosed in Patent Document 1 is known as a vehicle seat using an airbag device and a power cloth. In Patent Document 1, a seat back is exemplified as a vehicle seat. In this seat back, as indicated by reference numeral 110 in FIG. 4 of the present application, a pad 114 is provided around a frame 112 having a skeleton structure, and the pad 114 is covered with a skin 116. The skin 116 has a front main skin 124, a front side skin 126, and a seat back side skin 128.

  An airbag device 118 is provided between the frame 112 and the seat back side skin 128. An inflator 135 that is an inflating drive device and an airbag 137 that is an inflating member are stored inside the air bag device 118.

  When an impact exceeding the allowable limit is applied to the vehicle, the inflator 135 in the airbag device 118 is activated and gas is ejected from the inflator 135. The airbag 137 is inflated by this gas injection. The inflated airbag 137 instantly pushes the lid 122 of the airbag device 18 and jumps out of the airbag device 18. The air bag 137 that has jumped out is guided by the cotton cloth 152 as a power cloth, reaches the breaking sewing portion 131, breaks through the breaking sewing portion 131, and jumps out of the seat back 110. The jumped airbag 137 enters between the seated person and a structure (for example, a vehicle door), thereby protecting the seated person from the impact.

Japanese Patent Laid-Open No. 10-076084

  In the above-described conventional vehicle seat, the end portion of the cotton cloth 152 that is a force cloth is connected to the wire 158 on the frame 112 side. Thereby, the cotton cloth 152 is supported by the frame 112. Further, the end portion of the seat back side skin 128 is connected to a suspension wire 160 supported by the wire 158 via a C ring 138. Accordingly, the seat back side skin 128 is supported by the frame 112.

  Thus, in the conventional vehicle seat, the terminal stop of the seat back side skin 128 and the terminal stop of the cotton cloth 152 are performed independently of each other. For this reason, the structure for assembling the skin and the power cloth to the vehicle seat is complicated, and as a result, there are problems that the cost is increased and that the assembling work is difficult.

  The present invention has been made in view of the above-described problems in the conventional apparatus, and reduces the cost of the skin and the bundling, and simplifies the assembly work thereof, thereby reducing the cost and simplifying the manufacture. An object of the present invention is to provide a vehicle seat.

A vehicle seat (for example, a seat back) according to the present invention includes a frame, a pad attached to the frame, a skin covering the pad, an airbag device provided between the frame and the skin, and the airbag. A portion of the apparatus from which an airbag exits (for example, a lid) and a blanket provided between the skin and the blanket is stronger than the skin; It has a bag discharge portion (for example, a breaking sewing portion), the baffle is joined to the skin at the airbag discharge portion, and the other end of the buff is fixed to a fixing member together with the skin. being, the fixing member is a bracket fixed to the frame, the bracket is protruding from the frame toward the direction in which the webbing is pulled, the webbing and the skin Is fixed to the projecting portion of the bracket, the webbing is characterized in that provided along the inner surface of the skin.

  According to the present invention, instead of fixing the skin and the force cloth to separate fixing members, both are sewn together, so that the strength of the skin itself is increased and the skin is a part other than the airbag cleaving portion. I try not to cut it. In addition, by integrating the power cloth with the skin, it is not necessary to stop the power cloth alone, reducing the component cost and simplifying the assembly structure.

  The fixing member may be the frame or a member integrated with the frame. Thereby, a force cloth and an outer skin can be fixed firmly. Here, the “member integral with the frame” is, for example, a bracket protruding from the frame.

  The airbag discharge portion may be a seam formed by sewing adjacent skins with a sewing thread. Thereby, a highly reproducible airbag discharge portion capable of stably flying out the airbag can be formed.

  The end portion of the force cloth and the end portion of the skin can be fixed to the fixing member in a state of being folded back in the direction in which the skin is pulled. As a result, the webbing and the skin can be more firmly fixed against the tensile force.

In the vehicle seat according to the present invention, a second webbing can be provided on the opposite side of the webbing with the airbag discharge part (for example, the breaking sewing part) as a boundary. As a result, it is possible to more reliably prevent the epidermis from being broken at an unexpected place.

It said second force distribution can Flooding by two epidermal was stitched together. If the two epidermis are connected, the appearance of the epidermis can be varied. And even in that case, it is possible to prevent the seams of these two skins from being broken by the action of the second blanket.

  According to the vehicle seat according to the present invention, since the skin and the blanket are not fixed to separate fixing members, but both are sewn together, the strength of the skin itself is increased and the skin is opened by the airbag. It is designed not to be cut at any part other than the part. In addition, by integrating the power cloth with the skin, it is not necessary to stop the power cloth alone, reducing the component cost and simplifying the assembly structure.

It is a perspective view showing a seat back which is one embodiment of a vehicular seat concerning the present invention. FIG. 4 is a plan sectional view according to the line AA in FIGS. 1 and 3. It is a front view at the time of seeing the seat back of Drawing 1 from the front side. It is sectional drawing which shows an example of the conventional vehicle seat.

  Hereinafter, a vehicular seat concerning the present invention is explained based on an embodiment. Of course, the present invention is not limited to this embodiment. In addition, in the drawings attached to the present specification, components may be shown in different ratios from actual ones in order to show characteristic parts in an easy-to-understand manner.

  The vehicle seat of the present invention is, for example, a seat cushion on which a seated person places a buttock, a seat back on which a seated person leaves his / her back, a seat product formed by assembling a seat cushion and a seat back, and the like. A headrest may be attached to the top of the seat back. There is also a seat back in which the headrest is integrated.

  FIG. 1 shows a seat back as an embodiment of a vehicle seat according to the present invention. The seat back 1 includes a frame 2 having a frame structure, a pad 3 disposed around the frame 2, and a skin 4 covering the pad 3.

  Although the frame 2 is generally provided with a reclining device and other various functional units, only the gate-shaped frame portion of the frame 2 is shown in FIG. 1, and the other various functional portions are not shown. doing. The frame 2 is made of metal, hard synthetic resin, or the like. The pad 3 is made of an elastic material, for example, a urethane foam material. The skin 4 is formed of a material having air permeability, for example, fabric, leather, synthetic leather, or the like.

  Both side portions of the frame 2 are side frames 2a and 2b. The side frame 2a and the side frame 2b are connected by an upper frame 2c. An airbag device 5 is attached to a side frame 2a on the side close to a vehicle door (not shown). As shown in FIG. 2, the airbag device 5 includes a casing 6 as a storage container, an inflator 7 as an inflation driving means, an airbag 8 as an inflation member, and a lid 9 as a lid. Yes. When the inflator 7 is actuated and gas is ejected, the airbag 8 is instantaneously inflated and deployed to the outside of the casing 6, that is, ejected while pushing the lid 9 open.

  In FIG. 1, a right vertical insert wire 12 and a left vertical insert wire 13 are provided inside a seat back 1. An upper insert wire 14 and a lower insert wire 15 are provided between the insert wires 12 and 13. These insert wires 12, 13, 14, and 15 are formed of steel wires. These insert wires 12, 13, 14, 15 are arranged at predetermined positions by the insert molding technique when the pad 3 is formed by urethane foam molding.

  FIG. 3 shows a front view of the seat back 1 when the seat back 1 of FIG. 1 is viewed from the front side (that is, the driver's seat side). As illustrated, the vertical insert wires 12 and 13 have main line portions 12a and 13a, upper bent portions 12b and 13b, and lower bent portions 12c and 13c, respectively. The insert wires 12, 13, 14, 15 are wire rods for hanging and supporting the skin 4.

  FIG. 2 is a cross-sectional view taken along line AA in FIGS. 1 and 3. In FIG. 2, the airbag apparatus 5 is attached to the side frame 2a. A pad 3 is provided around the side frame 2a. A vertical insert wire 12 is provided inside the pad 3 by an insert molding technique. The vertical insert wire 12 extends in a direction penetrating the paper surface in FIG.

  The epidermis 4 has a front front skin 4a, a front inner skin 4b, a front outer skin 4c, and a side skin 4d. The first end of the front front skin 4 a and the first end of the front inner skin 4 b are sewn together by a sewing thread 16 inside the groove 10 formed in the pad 3. The second end of the front inner skin 4 b and the first end of the front outer skin 4 c are stitched together by a sewing thread 17. The second end of the front outer skin 4 c and the first end of the side skin 4 d are sewn together by a sewing thread 18. The portion sewn by the sewing thread 18 is broken when the airbag 8 of the airbag device 5 is inflated, and a breaking sewing portion 22 that is a portion that becomes an outlet to the outside of the airbag 8, that is, a portion that becomes an outlet, is formed. It is composed. In the present embodiment, the breaking sewing portion 22 is formed by a seam. A bracket 19 is attached to the side frame 2a. The second end portion of the side surface skin 4 d is sewn to the bracket 19 by a sewing thread 20. Reference numeral 21 denotes a backboard.

  A front webbing 24 is provided inside the front inner skin 4b and the front outer skin 4c. A side force cloth 25 is provided inside the side skin 4d. The force cloth 24 and the force cloth 25 are made of a material stronger than the skin 4. The first end of the front force cloth 24 is sewn to the first end of the front inner skin 4 b by the sewing thread 26 in the groove 10 of the pad 3. The first end portion of the front force cloth 24 is also sewn to the first end portion of the front front skin 4 a by the sewing thread 16.

  The second end portion of the front force cloth 24 is sewn to the second end portion of the front outer skin 4 c by a sewing thread 27. The first end portion of the side force cloth 25 is sewn to the first end portion of the side surface skin 4 d by the sewing thread 28. The second end portion of the side force cloth 25 is sewn to the second end portion of the side surface skin 4 d by a sewing thread 29. The second end portion of the front force cloth 24 and the first end portion of the side force cloth 25 are stitched together by the sewing thread 18. The second end of the side force cloth 25 is sewn to the bracket 19 of the frame 2a together with the second end of the side skin 4d by the sewing thread 20.

  Inside the groove 10 of the pad 3, a cotton bag 31 is sewn to the first end of the front front skin 4 a and the first end of the front inner skin 4 b by the sewing thread 16. The cotton bag 31 extends toward the bottom of the groove 10 (upper part in FIG. 2). A wire 32 is inserted through the tip of the cotton cloth bag 31. The skin-side wire 32 and the vertical insert wire 12 are connected by a hog ring using a ring 33. Thereby, the skin 4 is suspended and supported by the vertical insert wire 12.

  When the front inner skin 4b and / or the front front skin 4a is pulled outward due to any cause, the cotton bag 31 and the wire 32 inserted through it move in the direction of exiting the groove 10 as the skin moves. For this reason, the vertical insert wire 12 is pulled in the direction of coming out of the pad 3.

  When the vertical insert wire 12 is formed of a simple linear wire, the vertical insert wire 12 may come out of the pad 3 when the vertical insert wire 12 is pulled. However, in this embodiment, as shown in FIG. 3, since the bent portions 12b and 12c are provided at both ends of the vertical insert wire 12, the vertical insert wire can be applied even when a large tensile force is applied to the vertical insert wire 12. 12 does not come out of the pad 3. The same applies to the other vertical insert wire 13.

  Specifically, the bent portions 12 b and 12 c at both ends of the vertical insert wire 12 extend in the direction opposite to the direction in which the tensile force applied to the vertical insert wire 12 is applied (that is, the direction toward the central portion of the sheet 1). . And the bending angle with respect to the main line part 12a which each bending part 12b, 12c adjoins is about 90 degrees. The lengths of the bent portions 12b and 12c are set to such a length that the vertical insert wire 12 can be prevented from coming out of the pad 3 when an external tensile force is applied to the main wire portion 12a. Since the direction and length of the bent portions 12a and 12c are set in this way, when a large outward force is applied to the main line portion 12a, the bent portions 12b and 12c generate an appropriate reaction force. As a result, it becomes possible to prevent the vertical insert wire 12 from coming out of the pad 3. The same applies to the other vertical insert wire 13.

  Since the vehicle seat 1 of the present embodiment is configured as described above, when an impact exceeding the allowable range is applied to the side of the vehicle from the outside, the inflator 6 of the airbag device 5 in FIG. Gas is ejected and the airbag 8 is inflated instantaneously. The inflated airbag 8 pushes open the lid 9 and jumps out of the casing 6, and is instantaneously jumped out and deployed through the breaking sewing portion 22 while being guided by the force cloths 24 and 25. The deployed airbag 8 is interposed between the seated person and the door, and as a result, the seated person is protected from impact.

  As described above, when the airbag 8 is deployed from the breaking sewing portion 22 to the outside, the webbing 24 and the front inner skin 4b are momentarily strongly pulled outward. For this reason, a very large lateral force is applied to the vertical insert wire 12 through the cotton bag 31. If no measures are taken, the vertical insert wire 12 may be pulled out of the pad 3 by a large lateral force. However, in this embodiment, as shown in FIG. 3, since the bent portions 12b and 12c are provided at both ends of the vertical insert wire 12, the reaction force (that is, the resistance force) generated by these bent portions 12b and 12c. ) Can surely prevent the vertical insert wire 12 from coming off.

  In addition, the bending angle with respect to the main line part 12a of the bending parts 12b and 12c is not restricted to 90 degrees. In short, the bent portions 12b and 12c only need to be bent at an angle that can generate a reaction force that can prevent the insert wire from coming off when the main wire portion 12a is pulled. Such an angle is 45 ° or more and 135 ° or less with respect to the main line portion. This is because a reaction force sufficient to prevent the insert wire from coming off cannot be generated at an angle of less than 45 ° or more than 135 °.

In the present embodiment, at the bracket 19 of the side frame 2a in FIG. 2, the second end portion of the side skin 4d and the second end portion of the side force cloth 25 are stitched together and joined by the sewing thread 29. . Further, the second end portion of the side skin 4d and the second end portion of the side force cloth 25 are both fixed to the bracket 19 of the side frame 2a by the sewing thread 20. Further, the second end portion of the side skin 4d and the second end portion of the side force cloth 25 are folded back in a U shape in the direction of pulling when the airbag 8 jumps out (the right direction in FIG. 2). The sewing thread 20 is sewn and fixed to the bracket 19.

  With the above configuration, the side skin 4d and the side force cloth 25 are firmly fixed to the bracket 19 of the side frame 2a. For this reason, even when a large force is applied to the side skin 4 d and the side force cloth 25 when the airbag 8 is projected and deployed, the side skin 4 d and the side force cloth 25 are firmly fixed to the bracket 19.

In the conventional vehicle seat shown in FIG. 4, the cotton cloth 152, which is a force cloth, is fastened to the wire 158, and the seat back side skin 128 is fastened to another wire 160. This is because the idea that the cotton cloth 152 is a component part of the airbag 118, the skin 128 is a vehicle seat part, and the cotton cloth 152 and the skin 128 are separate parts was strong. On the other hand, in the present embodiment, the idea is changed, and the second end portion of the force cloth 25 and the second end portion of the side surface skin 4d are sewn together with the sewing thread 29 and then joined. The sewing thread 20 was sewn and fixed to the bracket 19 and thus to the side frame 2a.

  As described above, in this embodiment, since the skin and the webbing are not fixed to separate fixing members, but both are sewn together, the strength of the skin itself is increased and the skin is other than the airbag cleaving portion. It is trying not to cut at the part of. In addition, by integrating the power cloth with the skin, it is not necessary to stop the power cloth alone, reducing the component cost and simplifying the assembly structure.

  Further, in the present embodiment, a front force cloth 24, which is another force cloth, is provided on the opposite side of the side force cloth 25 with the breaking sewing portion 22 as a boundary. For this reason, the air bag 8 definitely comes out of the breaking sewing portion 22 and deploys without fail.

  In addition, the first end portion of the front force cloth 24 is not joined to the cotton bag 31 alone, but together with the first end portion of the front inner skin 4b and the first end portion of the front front skin 4a. The cloth bag 31 is sewn and joined (ie, co-sewn). For this reason, the strength of the epidermis itself is increased so that the epidermis is not cut off at portions other than the airbag cleaving portion. In addition, by integrating the power cloth with the skin, it is not necessary to stop the power cloth alone, reducing the component cost and simplifying the assembly structure.

Further, in the present embodiment, the skin 4 is divided into the front inner skin 4 b and the front outer skin 4 c in the side support portion of the seat back 1, and these are sewn and joined by the sewing thread 17. Although the joint portion is weak in strength, a common force cloth 24 is disposed on the inner surface of these skins, and the force cloth 24 is firmly fixed in the groove 10 of the pad 3 by co-sewing. Therefore, the skin is not cut at the joint portion of the sewing thread 17 when the airbag is opened.

Moreover, since the skin is sewn together with the sewing thread 17 at the side support portion of the seat back 1, the shape of the side support portion can be varied. Even in such a case, the strength cloth 24 is provided inside the outer skins 4b and 4c, so that the strength of the joint portion of the outer skin by the sewing thread 17 is kept high.

(Other embodiments)
The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the embodiments, and various modifications can be made within the scope of the invention described in the claims.

  For example, as can be understood from FIG. 1, the above embodiment considers a seat back disposed in a passenger seat of a vehicle adapted to Japan, but the present invention is applied to a seat back disposed in a driver seat. Is also applicable. Of course, it can also be applied to the rear seat if necessary.

  In the above embodiment, the end portion of the baffle 25 and the end portion of the skin 4d are fixed to the bracket 19 which is a member integral with the side frame 2a by co-sewing, but the baffle and the skin are fixed to the side frame 2a itself. Alternatively, it may be fixed to a portion of the frame 2 other than the side frame 2a.

  1. 1. Seat back (vehicle seat) Frames, 2a, 2b. Side frame, 2c. 2. upper frame; Pad, 4. Epidermis, 4a. Frontal epidermis, 4b. Front inner skin, 4c. Anterolateral skin, 4d. 4. lateral epidermis; 5. airbag device, Casing, 7. Inflator 8. 8. air bag; Lid, 10. 11. pad groove; Vertical insert wire, 12a. Main line part, 12b. Upper bent part, 12c. 12. Bending part, Vertical insert wire, 13a. Main line part, 13b. Upper bent part, 13c. A lower bent part, 14. 15. Upper insert wire Lower insert wire 16, 17, 18, 20,. Sewing thread, 19. Frame bracket, 21. Backboard, 22. Sewing part for breaking, 24. Front front blanket (second blanket), 25. Lateral force cloth, 26, 27, 28, 29. Sewing thread 31. Cotton cloth, 32. Wire, 33. ring

Claims (4)

Frame,
A pad attached to the frame;
An epidermis covering the pad,
An airbag device provided between the frame and the skin;
A force cloth provided between a portion where the airbag of the airbag device comes out and the skin,
The force cloth is stronger than the skin,
The epidermis has an airbag discharge part,
The force cloth is bonded to the skin at the airbag discharge portion;
The other end of the force cloth is fixed to a fixing member together with the outer skin,
The fixing member is a bracket fixed to the frame;
The bracket protrudes from the frame in the direction in which the baffle is pulled,
The force cloth and the skin are fixed to the overhanging portion of the bracket,
The vehicle seat according to claim 1, wherein the force cloth is provided along an inner surface of the skin . The airbag release unit for a vehicle seat according to claim 1 Symbol mounting characterized in that it is a seam formed by sewing the sewing thread of the skin adjacent to each other. End of the skin and the end portion of the webbing in a state where the skin is folded back in the direction of being pulled, according to claim 1 or claim 2, wherein that it is fixed to the fixing member Vehicle seat. A second webbing is provided on the opposite side of the webbing from the airbag discharge part;
The second blanket is provided along the inner surface of the two skins joined together.
The vehicle seat according to claim 1.

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