JP2005112099A - Vehicular occupant restraint system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reliably constrain a waist portion of an occupant on a collision while suppressing the cost. <P>SOLUTION: On a sudden deceleration caused by a head-on collision or the like of a vehicle, high-pressure gas is ejected into an inflator bag 29 from an inflator, the inflator bag 29 is inflated and developed to push up a seat cushion body. By the inflation and development of the inflator bag 29, a top plate 29b of the inflator bag 29 is displaced upwardly along the vertical direction with respect to a bottom plate, a tip part of a cable 41 is pulled upwardly by the top plate 29b, a buckle 37 with a tongue plate fitted thereto is pulled by a buckle pretensioner 24, and the tightening force of a lap belt 32b is increased. By the inflation and development of the inflator bag 29, the seat cushion body is lifted, the buckle pretensioner 24 pulls the buckle 37 with the inflator bag 29 as a power source, and the tightening force of the lap belt 32b is increased. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an occupant restraint device for a vehicle that restrains an occupant, in particular, a waist portion to a seat in the event of a collision, for example.

When the vehicle collides forward, the occupant tries to move forward due to inertia. When the occupant is wearing a seat belt, the forward movement of the occupant is restrained to some extent by the restraining action of the shoulder belt and lap belt of the seat belt device, but it is often not sufficient.
PRC (Pelvis Restraint Cushion) that restricts the forward movement of the passenger by instantly raising the front end of the seat cushion when the vehicle suddenly decelerates due to a forward collision to prevent the passenger from moving forward ) A waist restraint device to which the technology is applied has been proposed (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3).

FIG. 18 is a diagram for explaining the configuration and operation of the waist restraint device described in Patent Document 3, for example. FIG. 18 (a) is a diagram showing a state before expansion and deployment, and FIG. These are figures which show the state after expansion | deployment expansion | deployment.
As shown in FIGS. 18 (a) and 18 (b), the waist restraint device 1 is formed on the front surface of the seat frame 2 on the upper surface of the recess 3 formed in a recessed shape when viewed from above. An inflator bag 5 having, for example, a metal sheet 4 arranged so as to cover the inflator, and an inflator 6 that generates high-pressure gas and fills the internal space of the inflator bag 5 are provided.

Here, the inflator bag 5 is affixed to the seat frame 2 by welding, adhesion, or the like, and a part of the seat frame 2 serves as a lower surface portion of the inflator bag 5.
In a vehicle equipped with the waist restraint device 1, the inflator 6 is activated to feed high-pressure gas into the inflator bag 5, as shown in FIG. As a result, the metal seat 4 constituting the inflator bag 5 is inflated and deployed, and the front seat surface of the seat cushion 7 is raised, thereby preventing the occupant M seated on the seat from moving forward.

Further, as shown in FIG. 19, the buckle 13 on which the tongue plate 12 a of the tongue 12 passed through the seat belt 11 is fitted by the buckle pretensioner 14 in accordance with the inflating and deploying of the inflator bag 5. There has also been proposed a seat belt device 15 configured to fasten the lap belt 11a and more efficiently restrain the occupant's lower back (see, for example, Patent Document 4).
That is, the seat belt device 15 is, for example, a three-point seat belt device, and is a retractable one belt-like seat belt (webbing) 11 and a retractor connected to one end of the seat belt 11 so as to be rewound. 16, a lap belt anchor 17 that fixes the other end of the seat belt 11, a tongue 12 and a shoulder anchor 18 that are passed through the seat belt 11, a tongue, and a fitting for coupling and detaching the seat belt 11. As a buckle 13 and a buckle pretensioner 14.
The buckle pretensioner 14 translates a piston accommodated in a cylinder 18 by a high-pressure gas ejected from a small gas generator 19 made of MMG (Micro Gas Generator) or the like, via a wire connected to the piston. The buckle 13 is configured to be pulled.
JP-A-5-229378 JP-A-10-217818 British patent GB2357466 JP 2001-322531 A

  The problem to be solved is that, in the above-described conventional technique in which the inflator bag 5 and the buckle pretensioner 14 are combined, it is necessary to use an expensive MGG in addition to the inflator for inflating and deploying the inflator bag 5, and In addition, two squib drive circuits for ignition are required, and further, the control to be performed by the controller becomes complicated, and the cost of the apparatus increases.

  In order to solve the above problems, the invention according to claim 1 relates to a vehicle occupant restraint device for restraining and protecting an occupant to a seat in the event of a vehicle collision, and a seat cushion attached to a seat frame of the vehicle. A belt that restrains the occupant's waist to the seat; belt adjusting means that adjusts the restraint of the occupant by the belt; an inflator that generates high-pressure gas; and an inflator disposed below the seat cushion. An inflator bag for pushing up the seat cushion by being filled with the generated high-pressure gas and inflated and deployed, and the belt adjusting means enhances at least one end of the belt with the restraint condition. Belt holding means for holding the head so as to be displaceable in the direction, and the inflator bag is inflated and deployed. When the movement of the movable portion of the inflator bag according inflated and deployed, the said belt holding means is characterized by comprising a power transmission means for transmitting to increase the constraint condition.

  Further, the invention according to claim 2 relates to the vehicle occupant restraint device according to claim 1, wherein the power transmission means is configured such that one end portion thereof can be displaced together with the movable portion to the movable portion of the inflator bag. The other end portion has a wire member attached to the belt holding means.

  The invention according to claim 3 relates to the vehicle occupant restraint device according to claim 1 or 2, wherein the belt holding means is fixed to the seat frame and is attached to one end of the belt. The buckle to which is attached is held so as to be displaceable in the direction of pulling the belt.

  According to a fourth aspect of the present invention, there is provided the vehicle occupant restraint device according to the third aspect, wherein the buckle has a wire winding portion around which the wire member is wound.

  A fifth aspect of the present invention relates to the vehicle occupant restraint device according to any one of the first to fourth aspects, wherein the belt holding means is fixed to the seat frame and is at one end of the belt. The anchor attached to is held so as to be displaceable in the direction of pulling the belt.

  According to a sixth aspect of the present invention, there is provided the vehicle occupant restraint apparatus according to the fifth aspect, wherein the anchor has a wire winding portion around which the wire member is wound.

  A seventh aspect of the present invention relates to the vehicle occupant restraint device according to any one of the second to sixth aspects, wherein the belt holding means is configured to displace the wire member in a direction to increase the restraint. It has a check part for holding the wire member so as to allow and prevent displacement of the wire member in a direction to reduce the restraining condition.

  According to the configuration of the present invention, the inflator bag is used to push up the seat cushion and is also used as a power source for the belt adjusting means for applying a tensile force to the belt. The occupant can be restrained by restraining the waist.

  By using the inflator bag as a seat cushion push-up and as a power source for the belt adjusting means, the purpose of protecting the occupant by restraining the waist portion surely at the time of collision is realized while suppressing the cost.

  1 is a plan view showing a schematic configuration of a vehicle occupant restraint device according to a first embodiment of the present invention, FIGS. 2 to 4 are perspective views showing a schematic configuration of the vehicle occupant restraint device, and FIG. Sectional drawing which shows a mode that the cable was attached to the inflator bag of the passenger | crew restraint apparatus for vehicles, FIG. 6 is the perspective view which looked at the inflator bag from the top plate side, and FIG. 7 shows the cable attached to the inflator bag. FIG. 8 is a cross-sectional view showing the configuration of the buckle holding portion of the vehicle occupant restraint device, FIG. 9 is a side view showing the tongue attached to the buckle holding portion, 10 to 13 are explanatory views for explaining the operation of the vehicle occupant restraint device.

  As shown in FIGS. 1 to 5, the vehicle occupant restraint device 21 of this example includes a seat cushion device 22 having a waist restraint function and a three-point type in which the buckle 37 can be displaced in the direction of pulling the lap belt 32 b. A seat belt device 23 and a buckle pretensioner (belt adjusting means) 24 for pulling the buckle 37 at the time of collision detection to improve the delay of the initial seat belt operation time are provided.

The seat cushion device 22 includes a seat cushion body (seat cushion) 27 attached to a vehicle seat frame 26, seat cushion springs 28, 28,... Elastically supporting the seat cushion body 27 from below, and a seat cushion body. 27, an inflator bag 29 that is disposed through a seat cushion spring 28 and is inflatable and deployable by filling with high-pressure gas, and for inflating and inflating the inflator bag 29 by injecting high-pressure gas into the inflator bag 29. And an inflator (not shown) having a substantially cylindrical shape.
In the seat cushion spring 28, a metal linear member having a predetermined diameter is processed into, for example, a continuous substantially sinusoidal shape, and the surface including the linear member is flat as a whole when there is no load. For example, the both end portions thereof are arranged to be detachably held by a retainer (not shown) as a holding member fixed to the side frame member 55. In other words, each seat cushion spring 28 is held by a retainer so that it can be removed along with the deployment of the inflator bag 29.

As shown in FIG. 6, the inflator bag 29 has a sealed structure that inflates and expands by filling with a high-pressure gas. The inflator bag 29 is a rectangular box-shaped bag body 29a made of a metal sheet or a resin sheet molded body, and a bag body. It is comprised from the bottom plate 29c which blocks the bottom face which opposes the top plate 29b of 29a.
The bottom plate 29c is formed integrally with the bag body 29a or joined to the bag body 29a by caulking or welding.
The rectangular box-shaped bag body 29a has a gusset 29d for securing a height dimension on the peripheral side surface, and a fold line 29e that folds inward is formed in the middle in the height direction of the gusset 29d. (See FIG. 11 (b) and FIG. 11 (c)).

In addition, in order to ensure that the corners 29p and 29q on both sides adjacent to each other across the corners can be folded without interfering with each other even in the corners, the corners 29p on one side across the corners At the end, a triangular folded portion 29r is formed that is folded over the folded portion in accordance with folding of the other side-side town portion.
The triangular folded portion 29r is folded at the 29s line and 29t line at the outer edge of the triangle, and is folded at the 29u line on the folded line, thereby overlapping the adjacent town portion 29q. Is done.

The inflator bag 29 in a contracted state is formed by folding the gusset 29d with a broken line 29e and folding the square box-shaped bag body 29a flat. Further, the bottom plate 29c is formed with a recess for attaching the inflator, and the inflator is fixed to the bottom plate 29c in a state where the gas injection port of the inflator is fitted to the gas blowing port provided in the recess.
In this example, the inflator bag 29 and the inflator are attached to the seat frame 26 via attachment members.

The seat belt device 23 of this example is a three-point seat belt device, and includes a single continuous belt-like seat belt (webbing) 32 and a retractor 33 connected to one end of the seat belt 32 so as to be able to be wound. A lap belt anchor 34 that fixes the other end of the seat belt 32, a tongue 35 and a shoulder belt anchor 36 that are passed through the seat belt 32, and a tongue plate 35a of the tongue 35 are attached to the seat belt 32. And a buckle 37 as a metal fitting for dissociation.
The seat belt 32 is mounted on a shoulder belt 32a that is slanted in front of the chest from one upper part on the left and right sides of the occupant seated on the seat to the lower part on the other side, and on the waist on the other side from the left and right sides of the occupant. And a lap belt 32b.

The shoulder belt 32a is guided by the shoulder belt anchor 36 and is stretched over the chest of the occupant. The tongue 35 is connected to the shoulder belt 32a and the lap belt 32b, and the tongue plate 35a is inserted and locked to the buckle 37 when the seat belt is mounted.
As shown in FIGS. 2, 8 and 9, the buckle 37 is provided with a latch mechanism for a tongue plate 35a therein, and the wire winding around which the other end of the wire is wound in a substantially U shape. A portion 37a, an insertion port 37b of the tongue plate 35a, and a press button 37c for releasing the latch are provided. The lap belt anchor 36 is fixed to the outer surface of one side frame member 55 constituting the seat frame 26.

The buckle pretensioner 24 of this example is a power that transmits the translational movement (movement in the height direction) of the movable part (top plate) when the inflator bag 29 is expanded and inflated to the buckle 37 side, as shown in FIGS. A transmission portion (power transmission means) 25; and a buckle holding portion (belt holding means) 43 fixed to the outer surface of the side frame member 55 facing the side frame member 55 to which the lap belt anchor 34 is fixed. It has become.
The power transmission unit 25 includes a cable 41 and a bag side fixing portion 42 for fixing one end portion of the cable 41 to the inflator bag 29.
The cable 41 includes a metal wire 41a and an exterior member 41b that covers and protects the wire 41a. The wire 41a can be provided in the exterior member 41b along the axial direction.

  As shown in FIGS. 5 and 7, the bag side fixing portion 42 is fixed to the top plate 29 b of the inflator bag 29, and a protruding portion 44 a for attaching to the end portion of the cable 41 is formed on one end side. An upper bracket 44 made of a long plate-like member and a protrusion 45a that is fixed to the bottom plate 29c of the inflator bag 29 and for attaching the end of the cable 41 to the lower end of the protrusion 44a are formed. The lower bracket 45 made of a long plate-like member and the insertion hole formed in the protruding portion 45a of the lower bracket 45 are fitted into the lower bracket 45 so that the cable 41 is fitted therein and the upper outer peripheral surface is fitted. Is fixed to the upper surface of the projecting portion 45a with the insertion hole and the axial center of the cylindrical joint member 46 having a male screw threaded. Screwed into the upper part and a nut member 47 for holding the joint member 46.

In the cable 41, the wire 41a is exposed at the tip end side beyond the joint member 46, and the tip of the wire 41a is fixed to the protruding portion 44a of the upper bracket 44 by welding or the like.
The upper bracket 44 and the lower bracket 45 are fixed to the inflator bag 29 by welding or using a fixing tool such as a bolt.

  As shown in FIGS. 8 and 9, the buckle holding portion 43 is formed inside a cylindrical member 48 that is bent substantially at a right angle and through which the cable 41 or the wire 41 a is inserted, and is wound around the winding portion 37 a of the buckle 37. A wire fixing portion 49 for fixing the other end of the wire 41a hung and a retreat of the wire 41a (moving in the direction in which the buckle 37 is pulled in and tightening the lap belt 32b) are allowed, and moving forward (moving in the direction in which the lap belt 32b is loosened) ) And a mounting plate 52 provided on the inner peripheral surface side of the cylindrical member 48 is in contact with the outer surface of the side frame member 55, It is fixed to the side frame member 55 using a fixture M.

In addition, a guide portion 53 for guiding the movement of the wire 41 a is formed on the inner peripheral side of the curved portion of the cylindrical member 43.
In this example, the cable 41 is disposed in the cylindrical member 48 in a state where the exterior member 41b is removed and the wire 41a is exposed except for the entrance portion.
Further, the seat frame 26 has a substantially rectangular shape, and includes side frame members (side members) 55, 55, a front frame member (front cross member) 56, and a rear frame member (rear cross member) 57. And has. An insertion hole 55p for inserting the cable 41 is formed in the side frame member 55 to which the buckle holding portion 43 is attached.

Next, with reference to FIG. 10 thru | or FIG. 13, operation | movement of the passenger | crew restraint apparatus 1 for this example is demonstrated.
First, when the inflator is not in operation, the inflator bag 29 remains folded as shown in FIGS. 10 (a) and 11 (a). As shown in FIG. 12 (a), the seat cushion spring 28 and the seat No pressing force is applied to the cushion body 27.
Further, since the top plate 29b of the inflator bag 29 is not displaced with respect to the bottom plate 29c, the cable 41 is not pulled by the bag side fixing portion 42. Therefore, as shown in FIG. 13A, the buckle 37 to which the tongue plate 35a is attached is not pulled by the buckle pretensioner 24, and the tightening force of the lap belt 32b is maintained without increasing.

When the inflator is activated during sudden deceleration due to a frontal collision of the vehicle or the like, high-pressure gas is ejected from the inflator into the inflator bag 29.
The inflator bag 29 is inflated and deployed as shown in FIGS. 10 (b) and 11 (b) when the jetted high-pressure gas fills the inside, and as shown in FIG. 12 (b), the cushion spring 28 and the seat cushion body 27 are pushed up.
Further, due to the inflating and deploying of the inflator bag 29, the top plate 29b of the inflator bag 29 is displaced upward along the height direction with respect to the bottom plate 29c, and the leading end portion of the cable 41 is formed by the bag side fixing portion 42. It is pulled upward by 29b.
As a result, as shown in FIG. 13B, the buckle 37 to which the tongue plate 35a is attached is pulled by the buckle pretensioner 24, and the tightening force of the lap belt 32b is increased.

The inflator bag 29 is further inflated and deployed as shown in FIGS. 10 (c) and 11 (c) and pushes up the cushion spring 28 and the seat cushion body 27 as shown in FIG. 12 (c).
Further, due to the inflating and deploying of the inflator bag 29, the top plate 29b of the inflator bag 29 is displaced further upward along the height direction with respect to the bottom plate 29c. It is further pulled upward by the plate 29b.
As a result, as shown in FIG. 13C, the buckle 37 to which the tongue plate 35a is attached is further pulled by the buckle pretensioner 24, and the tightening force of the lap belt 32b is further increased.
In this way, the inflator bag 29 is inflated and deployed to lift the seat cushion body 27, and with the inflator bag 29 as a power source, the buckle pretensioner 24 pulls the buckle 37 to which the tongue plate 35a is attached, and wraps the bag. By increasing the tightening force of the belt 32b, the occupant is reliably restrained.

  According to the configuration of this example, the inflator bag 29 is used to push up the seat cushion body 27 and also used as a power source of the buckle pretensioner 24 for applying a tensile force to the lap belt 32b. While restraining, the occupant's waist can be securely restrained during a collision to protect the occupant.

FIG. 14 is a perspective view showing a configuration of a vehicle occupant restraint device that is Embodiment 2 of the present invention, and FIG. 15 is a cross-sectional view showing a main part in which a cable is attached to an inflator bag of the vehicle occupant restraint device. FIG. 16 is a cross-sectional view showing a configuration of a lap belt anchor of the vehicle occupant restraint device.
The difference between this example and Example 1 described above is that, in Example 1, the buckle was retracted along with the expansion and expansion of the inflator bag, whereas the lap belt anchor was retracted.
Since the other configuration is substantially the same as the configuration of the first embodiment described above, the description thereof will be simplified.

  As shown in FIGS. 14 and 15, the vehicle occupant restraint device of this example is configured such that the seat cushion device 22 having a waist restraint function and the lap belt anchor 3 are movable along the direction in which the lap belt 32b is pulled. A point-type seat belt device 61 and an anchor pretensioner 63 for pulling the lap belt anchor at the time of collision detection to improve the delay in the operation time of the initial seat belt 32 are provided.

The seat belt device 61 of this example is a three-point seat belt device, and includes a single continuous belt-like seat belt (webbing) 32 and a retractor 33 that is coupled to one end of the seat belt 32 so as to be rewound. A lap belt anchor 64 for fixing the other end of the seat belt 32, a tongue 35 and a shoulder belt anchor 36 that are passed through the seat belt 32, and a tongue plate 35a of the tongue 35 are mounted. And a buckle (not shown) fixed to a side frame member as a metal fitting for dissociation (see FIG. 2).
The seat belt 32 is mounted on a shoulder belt 32a that is slanted in front of the chest from one upper part on the left and right sides of the occupant seated on the seat to the lower part on the other side, and on the waist on the other side from the left and right sides of the occupant. And a lap belt 32b.
As shown in FIG. 16, the lap belt anchor 64 has a belt attaching portion 64a to which the end portion of the lap belt 32b is attached, and a wire winding portion 64b around which the wire 65a is wound.

The anchor pretensioner 63 in this example includes a power transmission unit (power transmission means) 62 that transmits a translational movement (movement in the height direction) when the inflator bag 29 is expanded and inflated to the buckle side, and a side frame member to which the buckle is fixed. And an anchor holding portion (belt holding means) 67 fixed to the side surface of the side frame member facing the side.
The power transmission unit 62 includes a cable 65 as an operation member, and a bag side fixing portion 66 for fixing one end of the cable 65 to the inflator bag 29.
The cable 65 includes a wire 65a and an exterior member 65b.

  The bag side fixing portion 66 is fixed to the top plate 29b of the inflator bag 29, and is an upper bracket made of a long plate-like member in which a protruding portion 68a for attaching to the end portion of the cable 65 is formed on one end side. 68 and a lower plate member which is fixed to the bottom plate 29c of the inflator bag 29 and has a long plate-like member in which a projecting portion 69a for attaching to the end portion of the cable 65 is formed on one end side below the projecting portion 68a. The cable 65 is inserted into the bracket 69 and inserted into the insertion hole formed in the protrusion 69a of the lower bracket 69 so that the cable 65 can move inside, and a male screw is screwed on the upper outer peripheral surface. The cylindrical joint member 71 provided is fixed to the upper surface of the projecting portion 69a with the same insertion hole and axial center, and screwed with the upper portion of the joint member 71. And a nut member 72 for holding the Yointo member 71.

In the cable 65, the wire 65 a is exposed on the distal end side from the joint member 71, and the distal end of the wire 65 a is fixed to the protruding portion 68 a of the upper bracket 68 by welding or the like.
The upper bracket 68 and the lower bracket 69 are fixed to the inflator bag 29 by welding or using a fixing tool such as a bolt.

  The anchor holding portion 67 is formed inside a cylindrical member 73 that is bent substantially at a right angle and through which the cable 65 or the wire 65a is inserted, and in addition to the wire 65a wound around the wire winding portion 64b of the lap belt anchor 64. The wire fixing portion 74 for fixing the end portion and the wire 65a are allowed to move backward (moving in the direction in which the lap belt anchor 64 is pulled in and the lap belt 32b is tightened), and advancement (moving in the direction in which the lap belt anchor 64b is loosened) are prevented. The fixing member M is used for the side frame member so that the mounting plate 76 provided on the inner peripheral surface side of the cylindrical member 74 is in contact with the outer side surface of the side frame member. It is fixed. Further, a guide portion 77 for guiding the movement of the wire 65a is formed on the inner peripheral side of the curved portion inside the cylindrical member 73.

Also in this example, the cable 65 is disposed in the cylindrical member 73 in a state where the exterior member 65b is removed except for the entrance portion and the wire 65a is exposed.
Further, as shown in FIG. 14, the seat frame 78 has a substantially rectangular shape, and includes side frame members (side members) 79, 79, a front frame member (front cross member) 81, and a rear frame. And a member (rear cross member) 82. The side frame member 79 to which the anchor holding portion 67 is attached is formed with an insertion hole 79p for inserting the cable 65.
The operation of the vehicle occupant restraint device in this example is substantially the same as that described in the first embodiment except that the lap belt 32b is pulled on the anchor side instead of pulling the lap belt 32b on the buckle side. Omitted.

  According to the configuration of this example, substantially the same effect as that of the first embodiment described above can be obtained.

FIG. 17 is a perspective view showing the configuration of a vehicle occupant restraint device that is Embodiment 3 of the present invention.
The difference between this example and Example 1 described above is that, in Example 1, the buckle was pulled in as the inflator bag was expanded and inflated, whereas cables were attached to both side surfaces of the inflator bag, and the buckle and lap belt anchor were It is the point which comprised so that it might pull in simultaneously.
Since the other configuration is substantially the same as the configuration of the first embodiment described above, the description thereof will be simplified.

  As shown in FIG. 17, the vehicle occupant restraint device 81 of this example is movable along the direction in which the seat cushion device 22 having a waist restraint function, the buckle 37 and the lap belt anchor 64 pull the lap belt 32b. The three-point seat belt device 82 is used together with a buckle pretensioner (belt adjusting means) 83 that pulls the buckle 37 when a collision is detected, and a lap when a collision is detected. An anchor pretensioner 84 for pulling the belt anchor 64 is provided.

The seat belt device 82 of this example is a three-point seat belt device, as shown in the figure, and is wound around one continuous belt-like seat belt (webbing) 32 and one end of the seat belt 32. A retractor 33 that can be connected, a lap belt anchor 64 that fixes the other end of the seat belt 32, a tongue 35 and a shoulder belt anchor 36 that are passed through the seat belt 32, and a tongue plate 35a of the tongue 35 are mounted. And a buckle 37 fixed to a side frame member as a fitting and detachment fitting for the seat belt 32.
The buckle pretensioner 83 and the anchor pretensioner 84 are the same as those described in the first and second embodiments, respectively. However, the distal ends of the cable 41 and the cable 65 are attached to the inflator bag 29 via the same upper bracket 85 and lower bracket 86.

When the inflator is suddenly decelerated due to a frontal collision or the like of the vehicle, the inflator bag 29 is inflated and deployed by filling the inside of the jetted high-pressure gas. The front end of is pulled upward by the top plate 29b.
As a result, the buckle 37 to which the tongue plate 35a is attached is pulled by the buckle pretensioner 83, and the lap belt anchor 64 is pulled by the anchor pretensioner 84, and the tightening force of the lap belt 32b is increased.
In this way, the inflator bag 29 is inflated and deployed to lift the seat cushion body 27, and with the inflator bag 29 as a power source, the buckle pretensioner 83 pulls the buckle 37 to which the tongue plate 35a is attached, The captive tensioner 84 pulls the lap belt anchor 64 and increases the tightening force of the lap belt 32b, so that the occupant is reliably restrained.

According to the configuration of this example, substantially the same effect as that of the first embodiment described above can be obtained.
In addition, the tightening force of the lap belt 32b can be increased more rapidly. Further, since the cable 41 and the cable 65 are pulled on both sides of the inflator bag 29, for example, the inflator bag 29 can be prevented from being inflated and deployed in an asymmetrical state.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. Are also included in the present invention.
For example, in the above-described embodiment, the case where the wire member is used as the operation member constituting the power transmission means has been described. .
Moreover, you may make it give an energy absorption function to the wire fixing | fixed part of a buckle holding | maintenance part or an anchor holding | maintenance part.
Further, the insertion hole 55p may be eliminated by extending the upper bracket and the lower bracket to the outside of the side member.
Further, the seat cushion spring is not limited to the left-right direction, and may be disposed along the front-rear direction.
Moreover, although the case where the high pressure gas from an inflator is supplied through the hole for ejection was described, you may make it provide an inflator inside an inflator bag.
The shape of the seat cushion spring is not limited to a substantially sine wave shape, and may be a rectangular wave shape or a triangular wave shape.

  In addition to a three-point seat belt device, the present invention can be applied to a case where a lap belt is disposed alone.

It is a top view which shows schematic structure of the passenger | crew restraint apparatus for vehicles which is Example 1 of this invention. It is a perspective view which shows schematic structure of the passenger | crew restraint apparatus for vehicles. It is a perspective view which shows schematic structure of the passenger | crew restraint apparatus for vehicles. It is a perspective view which shows schematic structure of the passenger | crew restraint apparatus for vehicles. It is sectional drawing which shows a mode that the cable was attached to the inflator bag of the passenger | crew restraint apparatus for vehicles. It is the perspective view which looked at the same inflator bag from the top plate side. It is a perspective view which shows a mode that the cable was attached to the inflator bag. It is sectional drawing which shows the structure of the buckle holding | maintenance part of the passenger | crew restraint apparatus for vehicles. It is a side view which shows a mode that the tongue was mounted | worn with the buckle holding | maintenance part. It is explanatory drawing for demonstrating operation | movement of the passenger | crew restraint apparatus for vehicles. It is explanatory drawing for demonstrating operation | movement of the passenger | crew restraint apparatus for vehicles. It is explanatory drawing for demonstrating operation | movement of the passenger | crew restraint apparatus for vehicles. It is explanatory drawing for demonstrating operation | movement of the passenger | crew restraint apparatus for vehicles. It is a perspective view which shows the structure of the passenger | crew restraint apparatus for vehicles which is Example 2 of this invention. It is sectional drawing which shows the main to which the cable was attached to the inflator bag of the passenger | crew restraint apparatus for vehicles. It is sectional drawing which shows the structure of the lap belt anchor of the passenger | crew restraint apparatus for vehicles. It is a perspective view which shows schematic structure of the passenger | crew restraint apparatus for vehicles which is Example 3 of this invention. It is explanatory drawing for demonstrating a prior art. It is explanatory drawing for demonstrating a prior art.

Explanation of symbols

21, 81 Vehicle occupant restraint device 22 Seat cushion device 23, 61, 82 Seat belt device 24, 83 Buckle pretensioner (belt adjusting means)
25, 62 Power transmission part (power transmission means)
26 Seat frame 27 Seat cushion body (seat cushion)
29 Inflator bag 26b Top plate (movable part)
32 seat belt 32b lap belt (belt)
35 tongue 36 lap belt anchor 37 buckle 37a wire winding part 41, 65 cable 41a, 65a wire 43 buckle holding part (belt holding means)
51,75 Wedge clamp (non-return part)
63,84 Anchor Pretensioner 64 Lap Belt Anchor (Check part)
64a Wire winding part 67 Anchor holding part (belt holding means)

Claims (7)

A vehicle occupant restraint device for restraining and protecting an occupant to a seat in the event of a vehicle collision,
A seat cushion attached to a vehicle seat frame;
A belt that restrains the occupant's waist to the seat;
Belt adjusting means for adjusting the degree of restraint of the occupant by the belt;
An inflator that generates high-pressure gas;
An inflator bag disposed below the seat cushion, and filled with a high-pressure gas generated by the inflator to inflate and deploy to push up the seat cushion;
The belt adjusting means includes: belt holding means for holding at least one end of the belt so as to be displaceable in a direction to increase the restraint; and when the inflator bag is inflated and deployed, the inflator bag is inflated and deployed. A vehicle occupant restraint device comprising power transmission means for transmitting the movement of the movable portion to the belt holding means so as to increase the restraint.   The power transmission means has a wire member having one end attached to the movable part of the inflator bag so as to be displaceable together with the movable part, and the other end attached to the belt holding means. The vehicle occupant restraint device according to claim 1, wherein the vehicle occupant restraint device is a vehicle occupant restraint device.   The belt holding means holds the buckle fixed to the seat frame and mounted with a tongue attached to one end of the belt so as to be displaceable in a direction in which the belt is pulled. The vehicle occupant restraint device according to claim 1 or 2.   The vehicle occupant restraint device according to claim 3, wherein the buckle includes a wire winding portion around which the wire member is wound.   5. The belt holding means is fixed to the seat frame and holds an anchor attached to one end side of the belt so as to be displaceable in a direction in which the belt is pulled. The vehicle occupant restraint device according to any one of the above.   6. The vehicle occupant restraint apparatus according to claim 5, wherein the anchor has a wire winding portion around which the wire member is wound. The belt holding means allows the displacement of the wire member in a direction to increase the restraining condition, and reversely holds the wire member so as to prevent the wire member from being displaced in a direction of decreasing the restraining condition. The vehicle occupant restraint device according to any one of claims 2 to 6, further comprising a stop portion.

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