JP2011140269A - Side airbag device and vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a side airbag device for a vehicle and a vehicle seat which allow a vertically long airbag to be easily installed on a door-side side frame portion of a seatback frame without causing enlargement in size or increase in the manufacturing cost, and are improved in an expansion and deployment performance of the airbag. <P>SOLUTION: In the side airbag device 10, an upper end portion 26A of the airbag 26 extended up to the upper side of the door-side side frame portion 20S of the seatback frame 20 is held by a clip 40 installed on the upper portion of the door-side side frame portion 20S. When the airbag 26 expands to deploy, this clip 40 supports the airbag 26 from the rear side of the seat while receiving a reaction force applied from the door-side side frame portion 20S toward the front side of the seat. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a side airbag device provided in a seat back of a vehicle seat and a vehicle seat.

  In the side airbag device for a vehicle seat disclosed in Patent Document 1 below, the vertical length is between a large (vertically long) airbag unit extended to the upper side of the seat back and the side frame of the seat back. A vertical plate-shaped guide plate that is substantially equivalent to the airbag unit is installed. The lower half of the guide plate is fixed to the side frame together with the lower half of the airbag unit, and the upper half of the airbag unit is secured by a paper adhesive tape that is easily broken when the airbag is inflated and deployed. It is fixed to the upper half of the guide plate. Thereby, the vertically long airbag unit extended to the upper side of the seat back is attached to the side frame.

JP 2009-35089 A

  However, since the side airbag device as described above requires a dedicated vertical plate-shaped guide plate, there is a problem that the device is increased in size and the manufacturing cost is increased. In addition, since the paper adhesive tape breaks as the airbag is inflated and deployed, the support of the upper half of the airbag unit with respect to the guide plate is released, so the upper half of the airbag is being inflated and deployed. There is a risk of flickering. For this reason, there is room for improvement in terms of improving the inflation and deployment performance of the airbag.

  In consideration of the above facts, the present invention can easily attach a longitudinal airbag to the door side frame portion of the seat back frame without incurring an increase in size or manufacturing cost, and the inflation and deployment performance of the airbag. It is an object to obtain a vehicle side airbag device and a vehicle seat that can improve vehicle performance.

  The side airbag device according to the first aspect of the present invention is disposed in a folded state on the side door side of the vehicle with respect to the seat back frame of the vehicle seat, and the lower side is the door side side frame portion of the seat back frame. The airbag is fixed to the upper side of the door-side side frame portion, and the airbag is operated to generate gas in the airbag to expand the airbag to the front side of the seat. A gas generating means for deployment and an upper portion of the airbag attached to an upper portion of the door side side frame portion and permitting the inflation and deployment, and a seat from the door side side frame portion during the inflation and deployment And a holding member that supports the airbag from the rear side of the seat while receiving a reaction force toward the front side.

  The “upper part of the door-side side frame part” described in claim 1 is an upper part when the door-side side frame part is divided into three equal parts: an upper part, an intermediate part in the vertical direction, and a lower part.

  In the side airbag device according to claim 1, the lower side of the airbag is fixed to the door side frame portion of the seat back frame, and the airbag is held by the holding member attached to the upper portion of the door side frame portion. The upper end is held. When the airbag is inflated and deployed by the operation of the gas generating means, the holding member receives the reaction force from the door side side frame portion to the seat front side and supports the airbag from the seat rear side. Thereby, since the upper end side of the airbag can be prevented from fluttering back and forth during inflation and deployment, the inflation and deployment performance of the airbag can be improved. In addition, since the upper end of the airbag is held by the holding member attached to the upper part of the door-side side frame part, it extends to the upper part of the door-side side frame part without increasing the size of the device or increasing the manufacturing cost. The vertically elongated airbag can be easily attached to the door-side side frame portion.

  A side airbag device according to a second aspect of the present invention is the side airbag device according to the first aspect, wherein the airbag includes an upper shoulder chamber, a lower waist chamber, and a vertical middle portion. A diffuser that communicates the shoulder chamber and the waist chamber is provided inside the airbag, and the gas generated by the gas generating means is rectified by the diffuser. Thus, the internal pressure of the shoulder chamber is higher than the internal pressure of the chest chamber.

  In the side airbag device according to claim 2, the gas generated by the gas generating means is rectified by a diffuser provided inside the airbag, so that the internal pressure of the shoulder chamber provided in the upper portion of the airbag is increased. However, it becomes higher than the internal pressure of the chest chamber provided in the middle portion of the airbag in the vertical direction. Thus, the shoulder chamber can be inflated and deployed at an early stage between the shoulder and the side door of the seated occupant having higher resistance than the chest of the seated occupant. Moreover, since the upper end of the airbag is held by the holding member disposed at the upper part of the door side frame, that is, near the shoulder of the seated occupant, the gap between the side door and the arm of the seated occupant In general, the shoulder chamber can be inflated and deployed at an early stage from a close position between the shoulder portion of the seated occupant and the side door in which a wide clearance is secured. Thereby, the passenger | crew protection performance by an airbag can be improved.

  The side airbag device according to a third aspect of the present invention is the side airbag device according to the first or second aspect, wherein the holding member is the door-side side frame with respect to an upper end portion of the airbag. A frame-side arm arranged on the side, a door-side arm arranged on the side door side with respect to the upper end of the airbag, and a rear end of the frame-side arm and the door-side arm connected to each other The frame side arm and the door side arm surround and hold the upper end of the airbag, and the airbag is configured to increase the internal pressure due to the operation of the gas generating means. In addition, the expansion and deployment is allowed by bending at least one of the door side arms.

  In the side airbag device according to claim 3, the holding member attached to the upper part of the door side side frame portion of the seat back frame has an upper end of the airbag by a frame side arm and a door side arm connected by a hinge portion. Enclose and hold the part. Thereby, at the normal time, the upper end portion of the airbag can be satisfactorily locked (stopped) to the upper portion of the door-side side frame portion by the holding member. On the other hand, when the internal pressure of the airbag rises due to the operation of the gas generating means, at least one of the frame side arm and the door side arm bends to allow the airbag to be inflated and deployed. As a result, the airbag can be inflated and deployed with a simple configuration. In addition, during the inflation and deployment of the airbag, the upper end side of the airbag is supported from the left and right by the frame side arm and the door side arm, so that the flap on the upper end side of the airbag can be further suppressed. Thereby, the inflation and deployment performance of the airbag can be further improved.

  A side airbag device according to a fourth aspect of the present invention is the side airbag device according to the third aspect, wherein the airbag is disposed on a rear end side of the frame side arm or a rear end side of the door side arm. The airbag support part arrange | positioned facing the upper end part of this from the back side of a sheet | seat is provided.

  In the side airbag device according to claim 4, the airbag support portion provided on the rear end side of the frame side arm of the holding member or the rear end side of the door side arm has a seat rear side with respect to the upper end portion of the airbag. It is arranged facing from the side. Therefore, when the airbag is inflated and deployed, the airbag can be favorably supported from the rear side of the seat by the airbag support portion.

  A side airbag device according to a fifth aspect of the present invention is the side airbag device according to the third or fourth aspect, wherein the upper end portion of the airbag extends to the seat rear side. A piece is provided, and the locking piece is locked to at least one of the frame side arm and the door side arm by a locking means.

  In the side airbag device according to claim 5, the locking piece extending from the upper end of the airbag to the seat rear side is engaged with at least one of the frame side arm and the door side arm of the holding member by the locking means. It has been stopped. Thereby, it can avoid that the upper end part of an airbag removes carelessly from a holding member.

  A vehicle seat according to a sixth aspect of the invention includes a seat cushion and a seat back, and the side airbag device according to any one of the first to fifth aspects is provided in the seat back. It is installed.

  In the vehicle seat according to claim 6, since the side airbag device according to any one of claims 1 to 5 is provided in the seat back, any one of claims 1 to 5 is provided. The same effects as those of the invention described in item 1 are exhibited.

  Next, another invention (reference invention) related to the invention according to claim 5 will be described. The side airbag device according to a first aspect of the present invention is the side airbag device according to claim 5, wherein the locking means protrudes from the frame side arm and penetrates the locking piece and the door side arm. At the same time, the front end side is an arm locking claw hooked on the door side arm.

  In the side airbag device according to the first reference invention, the arm locking claw protruding from the frame side arm of the holding member passes through the locking piece at the upper end of the airbag and the door side arm of the holding member. Accordingly, the upper end portion of the airbag can be locked to the holding member with a simple configuration. Moreover, since the arm locking claw protruding from the frame side arm is hooked on the door side arm, the arm side locking claw can prevent the frame side arm and the door side arm from being separated. Thereby, the holding state of the airbag upper end part by these arms can be made favorable.

  A side airbag device according to a second reference invention is the side airbag device according to the first reference invention, wherein the seatback frame has a plate-like portion joined to the door side frame portion, The holding member has a hooking piece extending from the frame side arm and having a tip side hooked on the plate-like portion.

  In the side airbag device according to the second reference invention, the front end side of the hook piece extended from the frame side arm of the holding member is hooked to the plate-like portion joined to the door side side frame portion of the seat back frame. Thus, the holding member can be attached to the door side frame portion. Thereby, the attachment operation | work of the holding member to a door side side frame part can be made easy.

  A side airbag device according to a third reference invention is the side airbag device according to the second reference invention, wherein the holding member is a base end side of the hooking piece disposed in front of the door side side frame portion. It is characterized by receiving the reaction force from the door side frame portion.

  In the side airbag device according to the third reference invention, the holding member has the proximal end side of the hook piece extending from the frame side arm disposed in front of the door side frame portion, and when the airbag is inflated and deployed. A reaction force from the door side side frame portion to the seat front side is received by the base end side of the hooking piece. That is, the hook piece for attaching the holding member to the door-side side frame portion also functions as a reaction force receiving portion that receives the reaction force from the door-side side frame portion, so that the configuration of the holding member can be simplified. .

  The side airbag device according to a fourth aspect of the present invention is the side airbag device according to claim 5, wherein the locking means protrudes from the door side arm, the locking piece, the frame side arm, and the A frame locking claw that penetrates the door side side frame portion and the front end is hooked on the door side side frame portion, and the holding member is attached to the door side side frame portion by the frame locking claw. It is characterized by.

  In the side airbag device according to the fourth reference invention, the frame locking claw protruding from the door side arm of the holding member passes through the locking piece at the upper end of the airbag and the frame side arm of the holding member. Accordingly, the upper end portion of the airbag can be locked to the holding member with a simple configuration. Moreover, the front end of the frame locking claw that penetrates the door-side side frame portion is hooked to the door-side side frame portion, whereby the holding member is attached to the door-side side frame portion. In other words, since the holding member can be attached to the door side side frame part simply by hooking the frame locking claw on the door side side frame part, it is easy to attach the holding member to the door side side frame part. Can do. Further, since the frame-engaging claw can prevent the frame-side arm and the door-side arm from being separated, the holding state of the upper end portion of the airbag by these arms can be improved.

  The side airbag device according to a fifth aspect of the present invention is the side airbag device according to claim 5, wherein the locking means penetrates the door side arm, the locking piece, and the frame side arm. The holding member is attached to the door side frame portion by screwing a male screw portion provided on the locking member into a female screw portion provided on the door side side frame portion side. It is characterized by being.

  In the side airbag device according to the fifth reference invention, the locking tool passes through the door side arm of the holding member, the locking piece at the upper end of the airbag, and the frame side arm of the holding member. Accordingly, the upper end portion of the airbag can be locked to the holding member with a simple configuration. In addition, the holding member is attached to the door-side side frame portion by the male screw portion provided on the locking tool being screwed into the female screw portion provided on the door-side side frame portion side. Thereby, a holding member can be firmly attached to a door side side frame part. Further, since the frame-side arm and the door-side arm can be prevented from being separated by the locking tool, the holding state of the upper end portion of the airbag by these arms can be improved.

  A side airbag device according to a sixth reference invention is the side airbag device according to the fourth reference invention or the fifth reference invention, wherein the holding member is configured such that a part of the frame side arm is the door side side frame. The reaction force from the door-side side frame part is received by a reaction force receiving part formed by bulging forward of the part.

  In the side airbag device according to the sixth aspect of the present invention, the holding member is a reaction force receiver formed by inflating a part of the frame side arm forward of the door side side frame portion when the airbag is inflated and deployed. The part receives a reaction force from the door side side frame part to the seat front side. Thus, by providing a reaction force receiving portion by expanding a part of the frame side arm, it is possible to receive a reaction force from the door side side frame portion, so that the holding member can be configured simply. it can.

  A side airbag device according to a seventh reference invention is the side airbag device according to the fourth reference invention or the fifth reference invention, wherein the holding member protrudes from the frame side arm and the door side side frame portion. The reaction force received from the door side frame portion is received by a reaction force receiving portion arranged in front of the door.

  In the side airbag device according to the seventh aspect of the present invention, the holding member protrudes from the frame side arm when the airbag is inflated and deployed by the reaction force receiving portion disposed in front of the door side side frame portion. Receives reaction force from the frame to the front side of the seat. Thus, by making the reaction force receiving portion project from the frame side arm, it is possible to receive the reaction force from the door side side frame portion, so that the holding member can be made simple.

  As described above, in the side airbag device according to the first aspect of the present invention, a vertically long airbag can be easily attached to the door side side frame portion of the seat back frame without causing an increase in size or manufacturing cost. While being able to attach, the expansion | deployment performance of an airbag can be improved.

  In the side airbag device according to the second aspect of the present invention, the shoulder chamber can be inflated and deployed at an early stage from a position close to between the shoulder portion of the seated occupant and the side door, and the occupant protection performance by the airbag is improved. Can be improved.

  In the side airbag device according to the invention described in claim 3, the upper end portion of the airbag can be satisfactorily constrained to the upper portion of the door-side side frame portion by the holding member in a normal state, and the airbag has a simple configuration. Can be allowed to expand. In addition, since the flutter on the upper end side of the airbag can be suppressed more satisfactorily, the inflation and deployment performance of the airbag can be further improved.

  In the side airbag device according to the fourth aspect of the present invention, the airbag can be favorably supported from the rear side of the seat by the airbag support portion of the holding member when the airbag is inflated and deployed.

  In the side airbag device according to the fifth aspect of the present invention, it is possible to prevent the upper end portion of the airbag from being inadvertently detached from the holding member.

  The vehicle seat according to the invention described in claim 6 has the same effects as the invention described in any one of claims 1 to 5.

1 is a schematic side view showing a partial configuration of a vehicle seat according to a first embodiment of the present invention. It is a side view which shows the structure of the seat back frame and side airbag apparatus of the vehicle seat shown by FIG. FIG. 3 is an enlarged side view in which a part of FIG. 2 is enlarged. FIG. 4 is an enlarged cross-sectional view showing a cut surface along line 4-4 in FIG. 3. It is a side view which shows the structure of the upper end part of the airbag which comprises the side airbag apparatus shown by FIG. It is a side view which shows the partial structure of the clip shown by FIG. 3 in the state seen from the opposite side to FIG. It is an expanded sectional view which shows the cut surface along line 7-7 of FIG.3 and FIG.6. It is an expanded sectional view corresponding to Drawing 4, and is a figure showing the state where the door side arm of a clip bent by the inflation pressure of an airbag. It is a side view which shows the structure of the side airbag apparatus and seat back frame which concern on 2nd Embodiment of this invention. It is an expanded sectional view which shows the cut surface along the 10-10 line of FIG. It is an expanded sectional view corresponding to FIG. 10 which shows the modification of 2nd Embodiment of this invention. It is a side view which shows the structure of the side airbag apparatus and seat back frame which concern on 3rd Embodiment of this invention. It is an expanded sectional view which shows the cut surface along line 13-13 of FIG. It is an expanded sectional view corresponding to FIG. 13 which shows the modification of 3rd Embodiment of this invention.

<First Embodiment>
Hereinafter, the side airbag device 10 according to the first embodiment of the present invention and the vehicle seat 12 configured by applying the side airbag device 10 will be described with reference to FIGS. 1 to 8. An arrow FR appropriately shown in each drawing indicates the front side of the vehicle seat 12, an arrow UP indicates an upper side of the vehicle seat 12, and an arrow IN indicates the inner side in the width direction of the vehicle seat 12. ing.

  FIG. 1 is a schematic side view showing a configuration of a main part of a vehicle seat 12 according to the present embodiment. As shown in this figure, a vehicle seat 12 includes a seat cushion 16 on which an occupant 14 is seated, and a seat back that is supported at a rear end portion of the seat cushion 16 so as to be tiltable and used as a backrest of the seated occupant 14. 18. In the present embodiment, the front direction, the upper direction, and the width direction of the vehicle seat 12 substantially coincide with the front direction, the upper direction, and the width direction of the vehicle.

  The seat back 18 includes a seat back frame 20 that is a skeleton member. The seat back frame 20 is formed by a pipe member 22 bent into a substantially inverted U shape and a pair of left and right sheet metal members 24 welded to the open side of the pipe member 22. It is comprised in the substantially reverse U shape where the lower part was open | released seeing from the front side.

  The seat back frame 20 is disposed on the side door side of the vehicle (not shown) in the seat back 18, the door side side frame portion 20 </ b> S extending in the vertical direction of the seat back 18, and the vehicle floor (not shown) in the seat back 18. A tunnel side frame portion (not shown) arranged on the tunnel side (vehicle width direction center side) and an upper portion connecting the door side side frame portion 20S and the upper end portions of the tunnel side side frame portion in the seat width direction. 20U. The door-side side frame portion 20S and the tunnel-side side frame portion are bent at the middle in the vertical direction when viewed from the width direction of the seat back 18, and the upper side is inclined toward the vehicle rear side.

  The upper portion 20U is configured by a portion of the pipe member 22 that extends in the width direction of the seat back 18 (a direction perpendicular to the paper surface in FIGS. 1 and 2). Further, the door side side frame portion 20S and the tunnel side side frame portion are configured such that the upper portion is a portion of the pipe material 22 extending in the vertical direction of the seat back 18, and the vertical middle portion and the lower portion are the sheet metal member 24. It is constituted by. The lower end portions of the door-side side frame portion 20S and the tunnel-side side frame portion are connected to a rear end portion of a seat cushion frame (not shown) constituting the skeleton of the seat cushion 16 via a reclining mechanism (not shown). .

  In the side part of the seat back 18 on the side door side with respect to the door side side frame part 20S, a vertically long side airbag device 10 extended to the upper side of the door side side frame part 20S is disposed. The side airbag device 10 includes an airbag 26 that inflates and deploys between a side door (not shown) and the seated occupant 14 to protect the seated occupant 14, and an inflator 28 that supplies gas into the airbag 26 (gas generation Means).

  As indicated by a two-dot chain line in FIG. 1, the interior of the airbag 26 is divided into an upper shoulder chamber 26U (upper chamber) and a lower waist chamber 26L (lower chamber) by an upper partition cloth 30 and a lower partition cloth 32. ), And a chest chamber 26M (intermediate chamber) in the middle in the vertical direction. A diffuser 34 for rectifying the gas ejected from the inflator 28 is provided inside the airbag 26. The diffuser 34 is a cloth material stitched to the rear end portion of the airbag 26, is formed in a cylindrical shape whose axial direction is along the vertical direction of the seat back 18, and communicates the shoulder chamber 26U and the waist chamber 26U. I am letting. In addition, a communication port that connects the chest chamber 26 </ b> M and the inside of the diffuser 34 is formed at an intermediate portion in the vertical direction of the diffuser 34. An inflator 28 is accommodated inside the diffuser 34 (in the cylinder), and the gas ejected from the inflator 28 is distributed by the diffuser 34 to the shoulder chamber 26U, the chest chamber 26M, and the waist chamber 26L. It is like that. Thereby, the airbag 26 is inflated and deployed to the front side of the seat back 18 while cleaving a stitched portion of the seat back pad and the seat cover (not shown). Further, the above-described diffuser 34 is configured to supply gas preferentially to the shoulder chamber 26U and the waist chamber 26L that are in the axial direction thereof, and thereby the internal pressure of the shoulder chamber 26U and the waist chamber 26L is reduced. The pressure is higher than the internal pressure of the chest chamber 26M.

  The airbag 26 having the above configuration is unitized together with the inflator 28 and the diffuser 34, and is attached to the door-side side frame portion 20S of the seat back frame 20 in a folded state (a state indicated by a solid line in FIG. 1). Specifically, the inflator 28 is fastened to the lower side of the door-side side frame portion 20S (portion formed by the sheet metal member 24) by a pair of upper and lower stud bolts 36 and a nut (not shown) screwed into these. The intermediate portion and the lower portion of the airbag 26 are fixed together with the inflator 28 from the intermediate portion to the lower portion of the door-side side frame portion 20S.

  The upper side of the airbag 26 is disposed to be inclined toward the vehicle rear side along the upper side of the door-side side frame portion 20S. The upper end portion 26A of the airbag 26 is opposed to the pipe member 22 constituting the upper portion of the door-side side frame portion 20S from the side door side, and the clip 40 attached to the upper portion of the door-side side frame portion 20S ( Is held on the upper part of the door-side side frame portion 20S.

  The clip 40 is formed of a resin material, and as illustrated in FIGS. 3 and 4, a plate-like plate disposed on the door side side frame portion 20 </ b> S side with respect to the upper end portion 26 </ b> A of the airbag 26. Frame side arm 40A, plate-like door side arm 40B disposed on the side door side with respect to upper end portion 26A of airbag 26, and hinge connecting the rear end portions of frame side arm 40A and door side arm 40B 40C. The frame side arm 40A and the door side arm 40B are bent in a direction in which the front end portions approach each other, and the upper end portion 26A of the airbag 26 is surrounded by the frame side arm 40A and the door side arm 40B. Yes. Thereby, the upper end portion 26 </ b> A of the airbag 26 is held by the clip 40.

  As shown in FIG. 4, the rear end side of the door side arm 40 </ b> B is bent in a crank shape, and is disposed opposite the upper end portion 26 </ b> A of the airbag 26 from the seat rear side. 40B1 is provided. Further, an arm locking claw 40D protruding toward the door side arm 40B is provided on the rear end side of the frame side arm 40A. The arm locking claw 40D passes through a through hole 42 formed in the central portion of a locking piece 26B (see FIG. 5) extending from the upper end portion 26A of the airbag 26 to the seat rear side, and on the door side. It penetrates through a through hole 46 formed on the rear end side of the arm 40B, and a return portion 40D1 provided on the front end side is hooked on the door side arm 40B. Accordingly, the upper end portion 26A of the airbag 26 is locked to the clip 40, and the frame side arm 40A and the door side arm 40B are prevented from being separated.

  As shown in FIGS. 3, 6, and 7, a plate-like upwardly extending piece 40E extends from the upper edge of the frame side arm 40A toward the upper side of the seat back 18. The hooking piece 40F extends from the rear end edge of the upward extending piece 40E toward the inner side in the sheet width direction. The base end side of the hooking piece 40F is a reaction force receiving portion 40F1, and the reaction force receiving portion 40F1 is close to the pipe material 22 in front of the pipe material 22 constituting the upper part of the door side side frame portion 20S. Alternatively, they are arranged in contact with each other. Further, the hooking piece 40F has a bent middle portion, and the leading end side extends toward the rear side of the seat. A notch 48 opened on the lower edge side of the hooking piece 40F is formed at the tip of the hooking piece 40F. The notch 48 corresponds to a long plate-like reinforcing frame portion 20 </ b> R (plate-like portion) that constitutes the upper portion of the seat back frame 20.

  The reinforcing frame portion 20R is arranged in a state where the longitudinal direction is along the left-right direction of the seat and the thickness direction is along the longitudinal direction of the seat, and one end portion in the longitudinal direction is the pipe material 22 constituting the upper portion of the door-side side frame portion 20S. The other end portion in the longitudinal direction is welded to the pipe material 22 constituting the upper portion of the tunnel side frame portion (not shown). The reinforcing frame portion 20R reinforces the upper portion of the seat back frame 20, and the hooking piece 40F of the clip 40 is hooked on the reinforcing frame portion 20R by inserting the reinforcing frame portion 20R into the notch 48. Yes. As a result, the clip 40 is attached to the door-side side frame portion 20S, and the upper end portion 26A of the airbag 26 is locked (restrained) to the upper portion of the door-side side frame portion 20S by the clip 40.

(Operation and effect of the first embodiment)
Next, the operation and effect of the first embodiment will be described.
In the side airbag device 10 of the vehicle seat 12 having the above-described configuration, the upper end portion 26A of the airbag 26 is held by the clip 40 attached to the upper portion of the door-side side frame portion 20S of the seat back frame 20, so The vertically long airbag 26 extended to the upper part of the door-side side frame portion 20S can be easily attached to the door-side side frame portion 20S without increasing the size and increasing the manufacturing cost.

  Moreover, the clip 40 is attached to the door-side side frame portion 20S simply by hooking the notch 48 of the hooking piece 40F extending from the frame-side arm 40A of the clip 40 to the reinforcing frame portion 20R joined to the door-side side frame portion 20S. Since it can attach, the attachment operation | work of the clip 40 to the door side side frame part 20S is very easy.

  Further, since the clip 40 surrounds and holds the upper end portion 26A of the airbag 26 by the frame side arm 40A and the door side arm 40B connected by the hinge portion 40C, the clip 40 holds the upper end portion 26A of the airbag 26 by the door. It can restrain favorably on the upper part of the side side frame part 20S.

  Further, the locking piece 26B extending from the upper end portion 26A of the airbag 26 to the rear side of the seat is locked to the clip 40 by the arm locking claw 40D protruding from the frame side arm 40A. It is possible to prevent the upper end portion 26 </ b> A from being inadvertently detached from the clip 40.

  Moreover, when the upper end portion 26A of the airbag 26 is locked to the clip 40, after the arm locking claw 40D is inserted into the through hole 42 of the locking piece 26B, the door side arm 40B is moved around the hinge portion 40C. By turning to the frame side arm 40A side, the distal end side of the arm locking claw 40D is inserted into the through hole 46 of the door side arm 40B, and the return portion 40D1 of the arm locking claw 40D is hooked on the door side arm 40B. Accordingly, since the upper end portion 26A of the airbag 26 can be locked to the clip 40, the upper end portion 26A of the airbag 26 can be easily locked to the clip 40 with a simple configuration.

  Moreover, since the return portion 40D1 provided on the arm locking claw 40D is hooked on the door side arm 40B, the frame side arm 40A and the door side arm 40B are prevented from being separated from each other. The holding state of the upper end portion 26A of the airbag 26 can be improved.

  On the other hand, when the vehicle has a side collision, a side collision state is detected by an airbag sensor (not shown), and the signal is input to the airbag ECU. The airbag ECU determines whether or not the side airbag device 10 should be operated based on the input signal. When it is determined that the “side airbag operation” is performed, a predetermined current is supplied to the inflator 28. As a result, the inflator 28 is actuated to eject gas into the airbag 26.

  The gas ejected from the inflator 28 is rectified by the diffuser 34 and supplied into the shoulder chamber 26U, the chest chamber 26M, and the lumbar chamber 26L of the airbag 26 (see arrows G1, G2, and G3 in FIG. 1). ). As a result, when the internal pressure of the airbag 26 increases, the door side arm 40B of the clip 40 receives the inflation pressure of the airbag 26 and bends away from the frame side arm 40A as shown in FIG. The holding of the upper end portion 26A of the airbag 26 by the door side arm 40B and the frame side arm 40A is released. Therefore, the airbag 26 can be inflated and deployed with a simple configuration.

  When the holding of the airbag 26 by the clip 40 is released as described above, the shoulder chamber 26U of the airbag 26 is inflated and deployed between the shoulder portion of the seated occupant 14 and the side door, and the waist chamber 26L is seated. The chest chamber 26M is inflated and deployed between the chest of the seated occupant 14 and the side door, while being inflated and deployed between the waist of the occupant 14 and the side door. Thereby, the seated occupant 14 is protected from the side by the airbag 26.

  Moreover, when the airbag 26 is inflated and deployed as described above, the gas in the inflator 28 is preferentially supplied to the chest chamber 26M and the waist chamber 26L by the diffuser 34, so that the shoulder chamber 26U and the waist chamber 26L. The internal pressure becomes higher than the internal pressure of the chest chamber 26M. As a result, the shoulder chamber 26U and the waist chamber 26L can be inflated and deployed at an early stage between the shoulder and waist of the seated occupant 14 having higher resistance than the chest of the seated occupant 14 and the side door. Accordingly, the seated occupant 14 can be optimally protected, and the occupant protection performance by the airbag 26 can be improved.

  Further, before the inflator 28 is actuated, the upper end portion 26A of the airbag 26 is held by the clip 40 at a position away from the seat occupant 14 in the upper part of the door side frame portion 20S, that is, in the front-rear direction of the seat back 18. The gas can be satisfactorily supplied to the upper side (shoulder chamber 26U) of the airbag 26 (see arrow G1 in FIG. 1). That is, since it is possible to avoid the gas supply to the shoulder chamber 26U being hindered by the seat occupant 14, early expansion and deployment of the shoulder chamber 26U can be ensured (note that the arrow G4 in FIG. The flow direction of the gas to the shoulder chamber in the conventional side airbag apparatus is shown).

  In addition, the shoulder chamber 26U is inflated at an early stage from a close position to a position between the shoulder portion of the seated occupant 14 and the side door, where a clearance is generally secured wider than the space between the side door and the arm portion of the seated occupant 14. Since it can be deployed, the occupant protection performance by the airbag 26 can also be improved.

  Further, when the shoulder chamber 26U is inflated and deployed as described above, the reaction force receiving portion 40F1 of the clip 40 receives the reaction force from the door side side frame portion 20S to the front side of the seat and moves the chest chamber 26M to the rear side of the seat. Support from. Thereby, it is possible to prevent the upper end portion 26A of the airbag 26 from swinging back and forth. Further, since the upper end portion 26A of the airbag 26 is supported from the left and right by the frame side arm 40A and the door side arm 40B during the inflation and deployment of the airbag 26, the upper end portion 26A of the airbag 26 fluctuates from side to side. Can also be prevented. As a result, the shoulder chamber 26U can be stably inflated and deployed toward the front side of the seat, so that the inflation and deployment performance of the airbag 26 can be improved. Moreover, since the reaction force receiving portion 40F1 is provided on the hooking piece 40F for attaching the clip 40 to the door-side side frame portion 20S, the configuration of the clip 40 can be simplified.

<Second Embodiment>
Next, another embodiment of the present invention will be described. In addition, about the structure and effect | action similar to the said 1st Embodiment, the same code | symbol as the said 1st Embodiment is provided, and the description is abbreviate | omitted.

  FIG. 9 is a schematic side view showing a configuration of peripheral members including a side airbag device 50 that is a component of a vehicle seat according to the second embodiment of the present invention. This embodiment has basically the same configuration as the first embodiment, but the configuration of the clip 52 as a holding member is different from the clip 40 according to the first embodiment.

  Similar to the clip 40 according to the first embodiment, the clip 52 includes a frame-side arm 40A, a door-side arm 40B, and a hinge portion 40C (see FIG. 10), but according to the first embodiment. The upper extending piece 40E and the hooking piece 40F are omitted. Further, in this clip 52, as shown in FIG. 10, a reaction force receiving portion 53 is provided on the frame side arm 40A. The reaction force receiving portion 53 is formed by a part of the frame side arm 40A bulging forward of the pipe material 22 constituting the upper portion of the door side side frame portion 20S. A portion in contact with the surface is formed in a curved surface shape.

  Further, the clip 52 is provided with a frame locking claw 55 instead of the arm locking claw 40D according to the first embodiment. The frame locking claw 55 protrudes from the rear end side of the door side arm 40B to the frame side arm 40A side, and includes a through hole 42 formed in the locking piece 26B at the upper end of the airbag 26, and the frame side arm 40A. It penetrates through a through hole 54 formed on the rear end side and a through hole 56 formed in the pipe material 22 of the door side side frame portion 20S. The front end side of the frame locking claw 55 is inserted inside the pipe material 22, and a return portion 55 </ b> A extending from the front end portion of the frame locking claw 55 is hooked on the inner peripheral surface of the pipe material 22. Thereby, the clip 52 is attached to the door side frame portion 20 </ b> S by the frame locking claw 55.

  In this embodiment, the upper end portion of the airbag 26 is locked to the clip 52 by the frame locking claw 55 that protrudes from the door side arm 40B of the clip 52 and penetrates the locking piece 26B of the airbag 26. With this configuration, the upper end of the airbag 26 can be locked to the clip 52. Moreover, if the frame locking claw 55 is inserted into the through hole 56 of the pipe material 22, the return portion 55A is hooked on the inner peripheral surface of the pipe material 22, and the clip 52 is locked to the door side frame portion 20S. The attachment work of the clip 52 to the door side frame portion 20S is extremely easy. Further, since the frame-side arm 40A and the door-side arm 40B are prevented from being separated by the frame locking claw 55, the holding state of the upper end portion of the airbag 26 by the arms 40A and 40B should be improved. Can do. Furthermore, in this embodiment, when the airbag 26 is inflated and deployed, the reaction force receiving portion 53 formed by a part of the frame side arm 40 </ b> A bulging out is forward of the seat from the pipe material 22. Therefore, the clip 52 can have a very simple configuration.

  In the clip 52 according to the second embodiment, the frame locking claw 55 is omitted and, as shown in FIG. 11, the clip 52 is attached to the door using a screw 58 (or a bolt) as a locking tool. You may make it the structure attached to the side side frame part 20S. The screw 58 passes through the door side arm 40B, the locking piece 26B, and the frame side arm 40A, and the front end side is screwed into a female screw portion 59 formed in the pipe material 22. Even in the case of this configuration, there is basically the same configuration as the second embodiment. Moreover, the clip 52 can be firmly attached to the door-side side frame portion 20S with the screw 58.

<Third Embodiment>
Next, another embodiment of the present invention will be described. In addition, about the structure and operation | movement fundamentally similar to the said 1st Embodiment and the said 2nd Embodiment, the same code | symbol as the said 1st Embodiment and the said 2nd Embodiment is provided, and the description is abbreviate | omitted.

  FIG. 12 is a schematic side view showing a configuration of peripheral members including a side airbag device 60 that is a component of a vehicle seat according to the third embodiment of the present invention. This embodiment has basically the same configuration as the second embodiment, but the configuration of the clip 62 as a holding member is different from the clip 52 according to the second embodiment. In this embodiment, the sheet metal member 24 constituting the door-side side frame portion 20S of the seat back frame 20 is extended to the upper side above the door-side side frame portion 20S, and the clip 62 is the upper end of the sheet metal member 24. Is attached.

  The clip 62 is basically configured in the same manner as the clip 52 according to the second embodiment, but instead of the reaction force receiving portion 53 according to the second embodiment, the clip side 62 is moved from the frame side arm 40A to the door side. A reaction force receiving portion 64 protruding forward of the side frame portion 20S is provided. The reaction force receiving portion 64 is formed in a plate shape whose sheet thickness direction is along the front-rear direction of the seat back, and abuts against the front end surface of the upper end portion of the sheet metal member 24 (upper portion of the door-side side frame portion 20S). Or they are arranged close to each other. In this embodiment, the frame locking claw 55 of the clip 62 passes through the through hole 66 formed in the upper end portion of the sheet metal member 24, and the return portion 55 </ b> A of the frame locking claw 55 is opposite to the clip 62. It is caught on the sheet metal member 24 on the side. Thereby, the clip 62 is attached to the door side frame portion 20S by the frame locking claw 55.

  This embodiment also has basically the same operational effects as the second embodiment. Moreover, since the rear end side of the frame side arm 40A of the clip 62 is in contact with the upper end portion of the sheet metal member 24, the attachment state of the clip 62 to the door side side frame portion 20S can be stabilized.

  In the clip 62 according to the third embodiment, the frame locking claw 55 is omitted, and as shown in FIG. 14, the clip 52 is attached to the door using a screw 58 (bolt may be used) as a locking tool. You may make it the structure attached to the side side frame part 20S. The screw 58 passes through the door side arm 40B, the locking piece 26B, the frame side arm 40A, and the sheet metal member 24. The distal end side of the screw 58 is a weld nut welded to the upper end portion of the sheet metal member 24. 68 (female thread portion). Even in this configuration, the configuration basically similar to that of the third embodiment is achieved. In addition, the clip 62 can be firmly attached to the door side frame portion 20S by the screw 58 and the weld nut 68.

  Further, in each of the above embodiments, the clip 40, 52, 62 as the holding member is configured to include the frame side arm 40A, the door side arm 40B, and the hinge portion 40C. The structure of the member can be changed as appropriate.

  Further, in each of the above embodiments, the airbag 26 includes the shoulder chamber 26U, the chest chamber 26M, and the waist chamber 26L, and the internal pressure of the shoulder chamber 26U is higher than the internal pressure of the chest chamber 26M when the inflator 28 is activated. However, the present invention is not limited to this, and the configuration of the airbag 26 can be changed as appropriate.

  In addition, the present invention can be implemented with various modifications without departing from the scope of the invention. Needless to say, the scope of rights of the present invention is not limited to the above embodiments.

DESCRIPTION OF SYMBOLS 10 Side airbag apparatus 12 Vehicle seat 20 Seat back frame 20R Reinforcement frame part (plate-shaped part)
20S Door side frame part 26 Air bag 26A Upper end part 26B Locking piece 26U Shoulder chamber 26M Chest chamber 26L Waist chamber 28 Inflator (gas generating means)
34 Diffuser 40 Clip (holding member)
40A Frame side arm 40B Door side arm 40B1 Airbag support part 40C Hinge part 40F1 Reaction force receiving part 50 Side airbag apparatus 52 Clip (holding member)
53 Reaction force receiving portion 60 Side airbag device 62 Clip (holding member)
64 Reaction force receiver

Claims (6)

Folded to the side door side of the vehicle with respect to the seat back frame of the vehicle seat, the lower side is fixed to the door side side frame portion of the seat back frame, and the upper end portion is the door side side frame portion An airbag disposed opposite the top of the
Gas generating means for generating gas in the airbag by operating to inflate and deploy the airbag to the front side of the seat;
It is attached to the upper part of the door-side side frame portion, holds the upper end portion of the airbag in a state allowing the inflation and deployment, and generates a reaction force from the door-side side frame portion to the seat front side during the inflation and deployment. A holding member that supports the airbag from the rear side of the seat while receiving the bag,
Side airbag device provided with.   The interior of the airbag is partitioned into an upper shoulder chamber, a lower waist chamber, and a chest chamber in the middle in the vertical direction, and the shoulder chamber and the waist chamber are disposed inside the airbag. The diffuser in communication is provided, and the gas generated by the gas generating means is rectified by the diffuser, so that the internal pressure of the shoulder chamber becomes higher than the internal pressure of the chest chamber. The side airbag device according to 1.   The holding member includes a frame side arm disposed on the door side side frame portion side with respect to an upper end portion of the airbag, and a door side arm disposed on the side door side with respect to the upper end portion of the airbag. And a hinge portion connecting the rear end portions of the frame side arm and the door side arm, surrounding and holding the upper end portion of the airbag by the frame side arm and the door side arm, and The air bag is allowed to be inflated and deployed by bending at least one of the frame side arm and the door side arm due to an increase in internal pressure caused by the operation of the gas generating means. 2. The side airbag device according to 2.   On the rear end side of the frame side arm or the rear end side of the door side arm, there is provided an airbag support portion arranged to face the upper end portion of the airbag from the rear side of the seat. 4. The side airbag device according to claim 3, wherein   The upper end of the airbag is provided with a locking piece extending to the rear side of the seat, and the locking piece is locked to at least one of the frame side arm and the door side arm by a locking means. The side airbag device according to claim 3 or 4, wherein the side airbag device is provided.   A vehicle seat including a seat cushion and a seat back, wherein the side airbag device according to any one of claims 1 to 5 is provided in the seat back.

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