JP2007313975A - Front passenger seat airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a front passenger seat airbag device capable of being easily manufactured and preventing an opened door part from contacting a front windshield. <P>SOLUTION: The front passenger seat airbag device M of the present invention is provided with the door part 5 arranged on an upper surface side of an instrument panel 3. The instrument panel 3 is constituted by a panel body 9 and a connection support part 18. The connection support part 18 is provided with a door body part 20 and a peripheral edge 24. The door body part 20 and the peripheral edge 24 are connected by a curved hinge part 25F becoming a rotation center at opening of the door part 5. The front side door body part 6 and the peripheral edge 24 at the periphery are connected to a peripheral edge of the front side door body part 21 arranged on a back surface side of the front side door part 6 opened toward a front side of the vehicle, and a strap 27 curved/arranged so as to be projected toward a back surface side of the front side door part 6 and restricting opening of the front side door part 6 is integrally formed with the front side door body part 21 and the peripheral edge 24. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an airbag device for a passenger seat disposed in a portion of an instrument panel (hereinafter referred to as “instrument panel”) in front of a passenger seat of a vehicle.

  Conventionally, as an airbag device for a passenger seat, the door portion disposed on the upper surface side of the instrument panel is provided in a storage portion disposed below the door portion so that the door portion can be pushed open when the inflation gas flows in. The instrument panel is configured to be folded and stored, and the instrument panel is made of a hard resin panel body disposed on the front surface side, and is made of a soft resin and coupled to the rear surface side of the panel main body. And a connection support portion attached to the device. In this conventional airbag device for a passenger seat, the panel main body is configured to include a door upper surface portion disposed at a portion of the door portion, and a general portion disposed around the door upper surface portion, and a connection support portion. Is a ceiling wall portion provided with a door main body portion arranged on the back surface side of the door upper surface portion and a peripheral edge portion arranged on the periphery of the door main body portion, and protrudes from the peripheral portion portion of the ceiling wall portion to the back surface side. And a connecting wall portion. And a door part is the structure which opens a door upper surface part by breaking the tear line part arrange | positioned in a periphery, isolate | separating from the surrounding general part, and using the curved hinge part which connects a door main-body part and a periphery part as a rotation center (For example, refer to Patent Document 1).

In addition, the front passenger seat airbag device includes a front opening door portion that is separate from the instrument panel, and a storage portion side for storing the airbag and a door portion on the left and right edge sides of the door portion. There has been a configuration in which a strap for connecting and restricting the opening of the door portion is disposed (see, for example, Patent Document 2).
JP 2004-99006 A Japanese Utility Model Publication No. 5-94030

  In the passenger seat airbag device described in Patent Document 1, the panel body of the instrument panel is made of a hard resin such as polypropylene (PPF) containing reinforcing fibers, and the connection support portion is made of an olefin-based thermoplastic elastomer (TPO) or the like. It is composed of a soft resin. In the passenger seat airbag device of Patent Document 1, when the door is opened, both the front and rear sides are extended so as to extend the curved hinge portions that are curved and arranged so as to protrude toward the back surface at both the front and rear ends. Will be opened. Since the front windshield is arranged in front of the instrument panel, when the passenger seat airbag device is a top mount type that is arranged on the front side of the instrument panel in the vicinity of the front windshield, the curved hinge part is large. There is a possibility that the door portion that extends and moves forward largely contacts with the front windshield. Therefore, in the passenger seat airbag device of Patent Document 1, it is necessary to consider the arrangement position in order to prevent the opened door portion from contacting the front windshield.

  Further, in the passenger seat airbag device described in Patent Literature 2, a strap that restricts the opening of the door portion by connecting the case side housing the airbag and the door portion to the left and right edge sides of the door portion. However, this strap is separate from the door part, and when assembling the airbag device, it is necessary to attach it to the door part later, which increases the number of manufacturing steps and costs. It was.

  SUMMARY OF THE INVENTION The present invention solves the above-described problems, and an object of the present invention is to provide an airbag device for a passenger seat that can be easily manufactured and can prevent an open door from contacting a front windshield. .

An airbag device for a passenger seat according to the present invention is folded and stored so that a door portion disposed on the upper surface side of an instrument panel in front of a passenger seat of a vehicle can be pushed open when the inflation gas flows in and protrudes. It is configured to include an airbag and a substantially box-shaped storage portion that is disposed below the door portion of the instrument panel and stores the airbag.
The instrument panel is composed of a panel body made of hard resin arranged on the front surface side, and a connection support part that is made of soft resin and is attached to the storage unit by being coupled to the back side of the panel body,
The panel main body is configured to include a door upper surface portion disposed at a portion of the door portion and a general portion disposed around the door upper surface portion, and the tear line portion formed on the periphery of the door upper surface portion Therefore, when opening the door, it is configured to be opened separately from the surrounding general part,
The connection support part
A ceiling wall portion composed of a door body portion disposed on the back surface side of the door upper surface portion and a peripheral portion disposed on the periphery of the door body portion, coupled to the back surface side of the panel body,
A connecting wall portion that is formed so as to protrude from the peripheral portion of the ceiling wall portion to the back surface side that is the storage portion side, and is connected to the storage portion;
And is configured to include
The door main body and the peripheral edge are curvedly arranged so as to protrude toward the back side of the door main body on the back side of the tear line part, and the curved hinge part serving as the rotation center when the door is opened, A passenger seat airbag device configured to be coupled,
As a configuration in which the door portion includes a front door portion that is arranged toward the front side of the vehicle when the curved hinge portion is disposed on the front edge side and opens.
The front door is a peripheral edge of the front door main body as a door main body disposed on the back side of the front door, and is on the edge that is the side of the curved hinge part and the tip side when opened. The main body and the peripheral edge around the front door main body are connected to each other, and the front door is opened when the airbag is deployed and inflated. The strap which regulates is formed integrally with the front door main body part and the peripheral part.

  In the airbag device for a passenger seat according to the present invention, since the strap that restricts the opening of the front door portion is formed on the connection support portion disposed on the back side of the panel body in the instrument panel, when the airbag is deployed and inflated When the front door part is opened, the strap opens so that the front door part moves largely forward even if the front door part is greatly pushed by the inflating airbag and the curved hinge part extends greatly. Therefore, the front door can be prevented from coming into contact with the front windshield located in front of the instrument panel. Further, in the passenger seat airbag device of the present invention, since the strap is integrally formed with the front door body portion and the peripheral edge portion, it is integrally formed at the time of manufacturing the connection support portion (by molding). Integrally molded). Therefore, unlike the conventional case, the step of attaching the strap to the door is not necessary, and the manufacturing man-hours and cost of the airbag device can be reduced.

  Therefore, the passenger-side airbag device of the present invention can be easily manufactured and can prevent the opened door from contacting the front windshield.

  Further, in the passenger seat airbag device of the present invention, when the strap is formed continuously from the curved hinge portion around the front door main body portion, the strap and the curved hinge portion are formed separately. As compared with, the shape of the molding die at the time of molding can be simplified, the flow of the resin at the time of molding is also good, and the moldability can be improved.

  In the passenger seat airbag device of the present invention, conversely, when formed separately from the curved hinge portion so as to open a gap between the curved hinge portion around the front door main body portion, Since a gap is provided between the curved hinge part, the curved hinge part and the strap are not affected by the bending of each other, and the strap is formed integrally with the curved hinge part. Compared with the case where it does, it becomes possible to open a front side door part smoothly smoothly in the initial stage of inflation of an airbag.

  Further, in the airbag device for a passenger seat having the above-described configuration, toward the rear surface side of the front door portion, on the edge portion that becomes the side portion side excluding the curved hinge portion side and the front end side when opened in the front door main body portion. If the protruding rib is arranged along the edge of the front door part from the strap to the front end when the front door part is opened, the front door part opened when the airbag is deployed and inflated is It is possible to prevent the front door from coming into contact with the front windshield by increasing the bending rigidity of the side portion of the door and preventing the front side from being bent (bend-deformed) toward the front side. be able to.

  Further, in the passenger seat airbag device having the above-described configuration, a plurality of straps are provided along the edge portions on the edge portions on the side portions excluding the curved hinge portion side and the front end side when opened in the front door main body portion. Even if the strap arranged on the curved hinge part side, which is the base part of the opening in the front door part, is broken, the front door part is moved forward by the strap arranged on the tip side. It is possible to restrict the opening so as to move largely toward.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the present specification, the up / down, front / rear, and left / right directions correspond to the up / down, front / rear, and left / right directions in a straight traveling state of the vehicle unless otherwise specified.

  The airbag device M for the passenger seat according to the embodiment is a top mount type that is disposed on the upper surface 4 side of the instrument panel 3 as shown in FIGS. An airbag 38 that is folded and stored below the door 5 that is disposed, an inflator 36 that supplies inflation gas to the airbag 38, and a case 32 as a storage unit that stores and holds the airbag 38 and the inflator 36. And a retainer 41 for attaching the airbag 38 to the case 32.

  As shown in FIGS. 1 to 3 and 7, the instrument panel 3 is configured to include, on the upper surface 4 side, a door portion 5 that can cover an opening 32 a described later of the case 32. In the case of the embodiment, the door part 5 is arranged side by side along the front and rear, the front door part 6 opening toward the vehicle front side when opened, and the rear door part 7 opening toward the vehicle rear side when opening, It consists of two pieces.

  2 and 3, the instrument panel 3 includes a panel body 9 made of hard resin disposed on the front surface side, and a connection support portion 18 made of soft resin and coupled to the back surface side of the panel body 9. And is composed of. Specifically, the panel body 9 is made of a hard resin such as polypropylene (PPF) containing reinforcing fibers, and the connection support portion 18 is made of a soft resin such as an olefin-based thermoplastic elastomer (TPO).

  The panel main body 9 is composed of a door upper surface portion 10 disposed at a portion of the door portion 5 and a general portion 13 disposed around the door upper surface portion 10. The door upper surface portion 10 is disposed at a portion of the front door portion 6 and is disposed at a portion of the substantially rectangular plate-shaped front door upper surface portion 11 constituting the surface side of the front door portion 6 and the rear door portion 7. The rear door upper surface portion 12 is a substantially rectangular plate shape that constitutes the surface side of the side door portion 7. And the tear line part 14 is formed in the periphery of the door upper surface part 10 over the perimeter. Specifically, the tear line portion 14 is formed between the front door upper surface portion 11 and the general portion 13, between the rear door upper surface portion 12 and the general portion 13, and between the front door upper surface portion 11 and the rear door upper surface portion 12. Each of them is formed over the entire region, and is arranged in a substantially “day” shape when viewed from above (see FIG. 1). In the case of the embodiment, as shown in FIG. 2, the tear line portion 14 is configured by a breaking groove 15 formed so as to be recessed in a substantially inverted V-shaped cross section from the back side of the panel body 9, and the door portion 5. When the door is opened, the front door upper surface portion 11 and the rear door upper surface portion 12 are each broken so as to be separated from the surrounding general portion 13. That is, in the embodiment, the front door portion 6 and the rear door portion 7 are opened so as to separate the entire front door upper surface portion 11 and the rear door upper surface portion 12 from the surrounding general portion 13, respectively. Become.

  The connection support portion 18 is formed substantially along the panel main body 9 and is formed so as to protrude from the ceiling wall portion 19 to the back surface side that is the case 32 side. And a connecting wall portion 29 to be configured.

  The ceiling wall portion 19 includes a door main body portion 20 disposed on the back surface side of the door upper surface portion 10 in the panel main body 9 and a peripheral edge portion 24 disposed on the peripheral edge of the door main body portion 20. The door main body 20 includes a substantially rectangular plate-shaped front door main body 21 disposed on the back side of the front door upper surface portion 11 and a substantially rectangular plate-shaped rear side disposed on the back surface side of the rear door upper surface portion 12. And a door main body 22. The peripheral edge portion 24 has a substantially rectangular frame shape that surrounds the peripheral edge of the door body 20 over the entire periphery. The front door main body portion 21 and the rear door main body portion 22 are each configured to have a slightly smaller outer shape than the front door upper surface portion 11 and the rear door upper surface portion 12, and the front door main body portion 21 is on the front edge side. The rear door main body portion 22 is connected to the peripheral edge portion 24 at the rear edge side by curved hinge portions 25 arranged on both front and rear sides of the door main body portion 20. The left and right edges of the front door main body 21 and the rear door main body 22 are separated from the peripheral edge 24 so as to provide a gap S1 between the front door main body 21 and the rear door main body 22. A gap S2 is also formed between the main body portion 22 (see FIGS. 2, 3, 5, and 6). The gap S1 is arranged at a position on the back side of the left side portion 14a and the right side portion 14b arranged on the left and right edges of the door upper surface portion 10 in the tear line portion 14, and the gap S2 is located on the front door upper surface portion 11 in the tear line portion 14. And the rear door upper surface portion 12 are disposed at positions on the back surface side of the central side portion 14c disposed between the rear door upper surface portion 12 and the rear door upper surface portion 12.

  Each curved hinge portion 25 constitutes the center of rotation when the front door portion 6 and the rear door portion 7 are opened, and the front portion 14d and the rear portion disposed on both front and rear edges of the door upper surface portion 10 in the tear line portion 14. It arrange | positions in the position used as the back surface side of the side site | part 14e. Each curved hinge portion 25 is configured integrally with the door main body portion 20 and the peripheral edge portion 24, and has a curved shape so as to protrude toward the back side of the door main body portion 20. The width dimension in the left-right direction is slightly smaller than that of the door main body 21 and the rear door main body 22, and is disposed over substantially the entire left and right sides of the front door main body 21 and the rear door main body 22.

  On the left and right edge sides of the front door main body 21, the left and right edges 21 a and 21 b of the front door main body 21, and the left part 24 a and the right part 24 b of the peripheral edge 24 arranged on the left and right sides of the front door main part 21. And a strap 27 for connecting the two to each other. In the case of the embodiment, as shown in FIGS. 5 and 6, each strap 27 is in the vicinity of the curved hinge portion 25 </ b> F disposed in front of the front door body portion 21 (on the base portion side when the front door portion 6 is opened). They are arranged at positions that are symmetrical. Each strap 27 is configured integrally with the door main body 20 and the peripheral edge 24, and is formed in a band shape along the left-right direction and curved so as to protrude toward the back side of the door main body 20. The shape is made. In the case of the embodiment, each strap 27 is configured to be separated from the curved hinge portion 25F so that a gap is formed between the strap 27 and the curved hinge portion 25F. When the airbag 38 is inflated and pushes the front door portion 6 open, the strap 27 connects the left and right edge portions of the front door portion 6 and the general portion 13 side as shown by the two-dot chain line in FIG. The front door 6 is connected to prevent the front end 6a from being opened so that the front end 6a is directed forward. In the embodiment, each strap 27 has a length dimension (on the back side). The height at which the front door 6 is opened at a position where the front end 6a is disposed in the substantially vertical direction with the tip 6a facing upward as shown in FIG. Is set.

  Also, in the vicinity of both left and right edges of the front door main body 21, ribs 21c that protrude toward the back side of the front door main body 21 are front and rear from the vicinity of the curved hinge 25F to the rear end (front end when opened). Is formed along the front-rear direction substantially along the edge. The rib 21c is disposed in order to prevent the rear end side, which is the front end 6a at the time of opening, from being bent toward the vehicle front side when the front door portion 6 is opened.

  The connecting wall portion 29 is disposed so as to protrude from the peripheral portion 24 portion toward the case 32. In the case of the embodiment, the connecting wall portion 29 has a substantially rectangular tube shape protruding from the vicinity of the inner edge of the peripheral portion 24 toward the case 32 side. Has been. The connecting wall portion 29 is disposed on the outer peripheral side of a peripheral wall portion 34 to be described later in the case 32, and a locking hook 34 a to be described later formed on the peripheral wall portion 34 of the case 32 is provided on a wall portion opposed to the front and rear. A plurality of locking holes 29a are formed along the left-right direction. Further, as shown in FIG. 4, through-holes 29 b through which the straps 27 are inserted are formed in the right and left wall portions of the connecting wall portion 29.

  In the case of the embodiment, the connection support portion 18 is formed with a number of pins 9 a arranged so as to protrude from the panel main body 9 to the back surface side on the ceiling wall portion 19 (the door main body portion 20 and the peripheral edge portion 24). The front end 9b protruding from the ceiling wall part 19 is melted so as to expand its diameter and heat caulked to be coupled to the back side of the panel body 9 (see FIG. 2).

  The case 32 as a storage portion is formed in a substantially rectangular parallelepiped shape made of a sheet metal having a rectangular opening 32a on the upper end side, and has a substantially rectangular plate-shaped bottom wall portion 33 attached by inserting the inflator 36 from below, The peripheral wall portion 34 has a substantially rectangular cylindrical shape extending upward from the outer peripheral edge of the wall portion 33. A plurality of locking hooks 34a that are inserted through the locking holes 29c of the connecting wall 29 and can lock the peripheral edges of the locking holes 29c are provided in the wall portion b facing the front and rear of the peripheral wall portion 34 along the left-right direction. Is formed. The case 32 is provided with a bracket (not shown) connected to the body side of the vehicle at the bottom wall 33.

  The inflator 36 includes a substantially cylindrical main body 36 a having a plurality of gas discharge ports 36 b and a flange portion 36 c for attaching the inflator 36 to the case 32.

  The airbag 38 is formed into a bag shape made of a woven fabric having flexibility, and is folded and stored in the case 32. The airbag 38 can be inserted through the main body 36a of the inflator 36, and is configured to include a gas inlet 39 that is opened in a substantially circular shape for allowing the inflation gas to flow therein. As shown in FIG. 7, it is set as the structure expand | swelled so that the space between the instrument panel 3 and the front windshield 1 arrange | positioned ahead of the instrument panel 3 may be block | closed.

  Note that the airbag 38 and the inflator 36 include a plurality of bolts 41 a of an annular retainer 41 disposed in the airbag 38, a peripheral edge of the gas inlet 39 in the airbag 38, a bottom wall portion 33 of the case 32, And the flange part 36c of the inflator 36 is penetrated, and it is attached to the case 32 by stopping the nut 42.

  Next, the assembly of the airbag device M for the passenger seat according to the embodiment will be described. The airbag 38 in which the retainer 41 is placed is folded so that each bolt 41a protrudes from the periphery of the gas inlet 39. The airbag 38 is housed in the case 32 so that the bolt 41 a protrudes from the bottom wall portion 33 of the case 32. Next, the main body 36 a of the inflator 36 is inserted into the case 32 from below the bottom wall portion 33, and each bolt 41 a protruding from the bottom wall portion 33 is inserted into the flange portion 36 c of the inflator 36. Thereafter, when the nut 42 is fastened to each bolt 41 a protruding from the flange portion 36 c of the inflator 36, the folded airbag 38 and the inflator 36 can be attached to the bottom wall portion 33 of the case 32.

  Then, a locking hook 34a formed on the peripheral wall portion 34 of the case 32 is locked to the periphery of the locking hole 29a formed in the connecting wall portion 29 of the connecting support portion 18 in the instrument panel 3 previously mounted on the vehicle. If the predetermined bracket (not shown) of the case 32 is fixed to the body-side portion of the vehicle, the passenger seat airbag device M can be mounted on the vehicle. The instrument panel 3 has a panel main body 9 and a connection support portion 18 formed by injection molding in advance, a pin 9a formed on the panel main body 9, and a ceiling wall portion 19 (the door main body portion 20 and the peripheral portion 24). ) Is inserted into the insertion hole 19a, and the protruding tip 9b is melted so as to expand its diameter and heat caulked, and the instrument panel 3 thus manufactured is mounted on the general portion 13 (not shown). Is bolted and mounted on the vehicle.

  If the inflation gas is discharged from the gas discharge port 36b of the inflator 36 after the front passenger airbag device M is mounted on the vehicle after the passenger seat airbag device M is mounted on the vehicle, the airbag 38 is expanded and formed in the instrument panel 3. The front door portion 6 and the rear door portion 7 are pressed, and the front door upper surface portion 11 and the rear door upper surface portion 12 are separated from the general portion 13 so as to break the tear line portion 14 arranged around. From the opening 32a of the case 32 formed by opening the front door portion 6 and the rear door portion 7, the front door portion 6 and the rear door portion 7 will open back and forth with the curved hinge portion 25 as the rotation center. The airbag 38 protrudes and completes the inflation as shown in FIG.

  In the passenger seat airbag apparatus M according to the embodiment, as shown in FIG. 8, the strap 27 that restricts the opening of the front door portion 6 to the connection support portion 18 disposed on the back side of the panel body 9 in the instrument panel 3. Therefore, when the front door portion 6 is opened when the airbag 38 is deployed and inflated, the front door portion 6 is largely pushed by the protruding airbag 38 to rotate when the front door portion 6 is opened. Even if the central curved hinge portion 25F extends greatly, the strap 27 restricts the front door portion 6 from opening so as to move largely forward while facing the front end 6a side forward. It is possible to prevent the front door portion 6 from coming into contact with the front windshield 1 located in front of the instrument panel 3. Further, in the passenger seat airbag apparatus M of the embodiment, since the strap 27 is integrally formed with the front door main body 21 and the peripheral edge 24, it is integrally formed when the connection support portion 18 is manufactured. (Integral molding by mold molding). Therefore, unlike the conventional case, the step of attaching the strap to the door is not necessary, and the manufacturing man-hours and cost of the airbag device can be reduced.

  Therefore, the passenger seat airbag apparatus M of the embodiment can be easily manufactured and can prevent the opened front door 6 from contacting the front windshield 1.

  Further, in the passenger seat airbag apparatus M of the embodiment, the strap 27 is formed separately from the curved hinge portion 25F so as to open a gap with the curved hinge portion 25F disposed in front. For this reason, the curved hinge portion 25F and the strap 27 are not affected by each other's bending, and the front door portion 6 can be easily opened smoothly in the early stage of inflation of the airbag 38.

  Further, in the passenger seat airbag device M of the embodiment, the left and right edges 21a and 21b of the front door main body 21 are provided with ribs 21c that protrude toward the back side, and the front door main body 21 (front door 6). 8), the front door 6 that is opened when the airbag 38 is deployed and inflated increases the bending rigidity of the side of the tip 6a by the rib 21c. As shown by the two-dot chain line, it is possible to prevent the front end 6a from being bent so as to face the front side (bending deformation), and to further prevent the front door 6 from contacting the front windshield 1. Is preferable.

  In the passenger seat airbag device M of the embodiment, each strap 27 is disposed on the left and right edge portions 21a, 21b side of the front door main body 21 and in the vicinity of the curved hinge portion 25F. However, the strap may be disposed at positions other than the front edge side which is the curved hinge portion 25F side and the rear edge side which is the front end side when opened, for example, the strap is connected to the left and right edges of the front door main body portion 21. It is good also as a structure arrange | positioned in the part 21a and 21b side, and the position used as the front-end | tip side vicinity at the time of opening.

  Further, the strap 27 is not limited to one place, and as shown in FIG. 9, two places along the edge portion 21a (edge portion 21b) are provided on the edge portion 21a side (edge portion 21b side) of the front door main body portion 21. It is good also as a structure arrange | positioned. In FIG. 9, the strap 27 </ b> B disposed on the rear side (opening tip side) has a substantially longer dimension than the strap 27 </ b> F disposed on the front side (opening base side). It is configured to increase. If a plurality of straps 27B and 27F are arranged in this manner, even if the strap 27F arranged on the curved hinge portion 25F side which is the base portion of the opening on the front door portion breaks, the tip of the opening With the strap 27 </ b> B arranged on the side, it is possible to restrict the front door portion from opening so as to move largely forward.

  Furthermore, as shown in FIG. 10, a strap 27 </ b> A formed continuously from the curved hinge portion 25 </ b> A may be used as the connection support portion 18 </ b> A. In this connection support portion 18A, the portion from the front edge to the left and right edges of the front door main body portion 21A is connected by the curved portion 44 that protrudes to the back side, including the corner portion. The part 44a located in front of the front door body 21A constitutes the curved hinge part 25A, and the parts 44b located on the left and right sides which are the sides of the front door body 21A constitute the strap 27A. It becomes. The bending portion 44 is configured to increase the amount of protrusion over the rear end side (the front end side of the front door main body portion 21A) of the portion 44b located on the side of the front door main body portion 21A constituting the strap 27A. is doing. In the connection support portion 18A having such a configuration, the shape of the molding die at the time of molding is simplified as compared with the case where the strap 27 and the curved hinge portion 25 are formed separately as in the connection support portion 18 described above. In addition, the flow of the resin at the time of molding becomes good, and the moldability can be improved. Moreover, in this connection support part 18A, the site | part 44b located in the side of the front door main-body part 21A of the curved part 44 which comprises the strap 27A is comprised so that protrusion amount may become large toward a rear end side. That is, the strap 27A is configured to be inclined so that the length dimension on the rear edge side is larger than the length dimension on the front side. Therefore, it is possible to suppress the curved hinge portion 25A from being affected by the strap 27A as much as possible in the early stage of inflation of the airbag, and it is possible to open the front door portion as smoothly as possible in the early stage of inflation of the airbag.

  In addition, in embodiment, although the door part 5 demonstrated taking the case where it was comprised from the front door part 6 and the rear door part 7 as an example, the thing of the structure provided with one door part of front opening as an instrument panel. In addition, the present invention is applicable.

1 is a schematic perspective view of an instrument panel of a passenger seat airbag device according to an embodiment of the present invention. It is a schematic sectional drawing which shows the airbag apparatus for passenger seats of embodiment. It is a schematic sectional drawing which shows the airbag apparatus for passenger seats of embodiment, and is a figure corresponding to the III-III site | part of FIG. It is a fragmentary sectional view which shows the site | part of the strap in the airbag apparatus for passenger seats of embodiment. It is a schematic perspective view of the connection support part used for the passenger's seat airbag device of an embodiment. It is a schematic perspective view of the connection support part used for the passenger's seat airbag device of an embodiment, and is a partial enlarged view showing the part of a strap. It is a schematic sectional drawing which shows the state which the airbag completed the expansion | swelling in the airbag apparatus for passenger seats of embodiment. It is a general | schematic partial expansion perspective view which shows the state which the front door part opened in the airbag apparatus for passenger seats of embodiment. It is a partial expansion perspective view which shows the site | part of the strap in the connection support part of the other form of this invention. It is a partial expansion perspective view which shows the site | part of the strap in the connection support part of the further another form of this invention.

Explanation of symbols

1 ... Front windshield,
3 ... Instrument panel,
4 ... the top surface,
5 ... Door part,
6 ... front door,
7: Rear door,
9 ... Panel body,
10 ... door upper surface,
11 ... The upper surface of the front door,
12 ... rear door top surface,
13 ... General Department,
14 ... The tear line,
18 ... connection support part,
19 ... ceiling wall,
20 ... door body,
21 ... front door body,
22: Rear door body,
24 ... peripheral part,
25 (25F, 25B, 25A) ... curved hinge part,
27, 27A ... Strap,
29 ... Connecting wall part,
32 ... Case,
36 ... Inflator,
38 ... Airbag,
M ... Airbag device for passenger seat.

Claims (5)

The instrument panel includes an airbag that is folded and stored so that a door portion disposed on the upper surface side of the instrument panel in front of the passenger seat of the vehicle can be pushed open when the inflation gas flows in and protrudes. It is configured to include a substantially box-shaped storage portion that is disposed below the door portion and stores the airbag.
The instrument panel is composed of a hard resin panel body arranged on the front surface side, and a connection support part made of a soft resin and coupled to the back side of the panel main body and attached to the storage unit And
The panel main body is configured to include a door upper surface portion disposed at a portion of the door portion and a general portion disposed around the door upper surface portion, and the door upper surface portion is formed at the periphery. The tear line portion is configured to be opened separately from the surrounding general portion when the door portion is opened,
The connection support part is
A ceiling wall portion that is coupled to the rear surface side of the panel main body and includes a door main body portion disposed on the rear surface side of the door upper surface portion and a peripheral edge portion disposed on a peripheral edge of the door main body portion;
A connecting wall portion that is formed so as to protrude from the portion of the peripheral edge portion of the ceiling wall portion to the back surface side that is the storage portion side, and is connected to the storage portion;
And is configured to include
The door body portion and the peripheral edge portion are curvedly arranged so as to protrude toward the back surface side of the door body portion on the back surface side of the tear line portion, and serve as a rotation center when the door portion is opened. A passenger seat airbag device configured to be coupled by a curved hinge portion,
As the configuration in which the door portion includes the front door portion that is arranged toward the front side of the vehicle when the curved hinge portion is disposed on the front edge side and opens.
A peripheral edge of the front door main body as the door main body disposed on the back surface side of the front door, and on the edge that is the side of the curved hinge and excluding the tip when opened The airbag is connected to the front door main body and the peripheral edge around the front door main body, and is curved so as to protrude toward the back side of the front door. A passenger seat airbag device, wherein a strap for restricting opening of the front door portion during inflation is formed integrally with the front door main body portion and the peripheral edge portion.   The airbag device for a passenger seat according to claim 1, wherein the strap is formed continuously from the curved hinge portion around the front door main body portion.   The said strap is formed separately from the said curved hinge part so that a clearance gap may be opened between the said curved hinge part around the said front side door main-body part. Airbag device for passenger seats.   A rib that protrudes toward the back side of the front door portion on the edge portion that is the side portion side excluding the curved hinge portion side and the front end side when opened in the front door main body portion, The airbag device for a passenger seat according to any one of claims 1 to 3, wherein the airbag device is disposed along the edge portion from the strap to a front end of the front door when the front door is opened.   A plurality of the straps are arranged along the edge on the side of the front door main body excluding the side of the curved hinge and the side of the front side excluding the front end. The airbag apparatus for passenger seats in any one of Claims 1 thru | or 4.

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