JP4165217B2 - Crew protection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an occupant protection device for protecting an occupant of a seat of a vehicle such as an automobile at the time of a collision, and in particular, restrains the occupant's waist at the time of a front collision, and the occupant's body moves forward and downward. The present invention relates to an occupant protection device configured to prevent.
[0002]
[Prior art]
As a system that protects automobile occupants in the event of a collision, even if the seatbelt is installed, it can be used between the seat cushion and the seat pan to prevent a submarine phenomenon where the occupant attempts to pass under the lap belt during a previous collision An occupant protection device in which an inflatable bag is disposed and the front portion of the seat cushion is pushed up by inflating the bag at the time of a vehicle collision is well known.
[0003]
In this type of occupant protection device, a load is applied to an inflated bag from an occupant who is about to move forward in the vehicle via a seat cushion that has received the bag.
[0004]
Japanese Laid-Open Patent Publication No. 2002-79861 discloses an occupant protection device in which a protrusion that rises upward from the upper surface of a seat pan is provided in front of the bag arrangement position, and the bag is supported from the front of the vehicle by this protrusion. Are listed.
[0005]
In the occupant protection device of the same publication, even if a load is applied to the inflated bag to push the bag forward, the protrusion supports the bag from the front of the vehicle. The vehicle will not move forward.
[0006]
[Patent Document 1]
JP 2002-79861 A
[Problems to be solved by the invention]
If the seat pan is provided with a projection as in the occupant protection device disclosed in Japanese Patent Application Laid-Open No. 2002-79861, the seat cushion is less comfortable to sit on.
[0008]
The present invention provides an occupant protection device that prevents a bag inflated so as to push up a seat cushion at the time of a frontal collision from moving forward of the vehicle due to a load from the occupant, and prevents the seat cushion from becoming uncomfortable. The purpose is to provide.
[0009]
[Means for Solving the Problems]
An occupant protection device according to the present invention (Claim 1) is disposed between a seat cushion and a seat pan, an inflatable bag for pressing the front portion of the seat cushion from below, and the bag in an emergency of a vehicle In the occupant protection device having a gas generator for inflating the vehicle and a forward movement blocking member for blocking the forward movement of the inflated bag, the seat pan has a protrusion for blocking the bag from moving forward. The front movement blocking member is not provided in front of the bag, and the front movement blocking member surrounds the bag and is a bag enclosure connected to the seat pan. The bag extends in the vehicle width direction, The bag enclosure has a belt-like shape and circulates in the middle of the bag in the longitudinal direction, and the bag enclosure is attached to the seat pan at a position behind the vehicle from the position where the bag is arranged. Are sintered, the bag envelope is that it has a circumferential length that bag without tightening the bag when inflated, and the bag does not tolerate this even tries to move toward the front of the vehicle It is a feature.
An occupant protection device according to the present invention (Claim 2) is disposed between a seat cushion and a seat pan, an inflatable bag for pressing the front portion of the seat cushion from below, and the bag in the event of a vehicle emergency In the occupant protection device having a gas generator for inflating the vehicle and a forward movement blocking member for blocking the forward movement of the inflated bag, the seat pan has a protrusion for blocking the bag from moving forward. The front movement blocking member is not provided in front of the bag, and the front movement blocking member surrounds the bag and is a bag enclosure connected to the seat pan. The bag extends in the vehicle width direction, The bag enclosure is in the form of a wide sheet and circulates substantially the entire longitudinal direction of the bag, and the bag enclosure is positioned at the rear of the vehicle relative to the position of the bag. The bag enclosure does not clamp the bag when the bag is inflated, and has a round length that does not allow the bag to move forward. It is characterized by this.
The occupant protection device according to claim 3 is characterized in that, in claim 2, the bag enclosure has a width that goes around an area of 80% or more in the longitudinal direction of the bag.
According to a fourth aspect of the present invention, the occupant protection device according to any one of the first to third aspects is characterized in that the bag enclosure is made of a flexible sheet material.
The occupant protection device according to claim 5 is the occupant protection device according to any one of claims 1 to 3, wherein the bag enclosure is formed of a metal plate.
[0010]
In the occupant protection device of the present invention, the bag is restrained by the seat pan by a bag enclosure disposed so as to surround the bag. For this reason, the seat pan is not provided with a protrusion such as a protrusion for preventing the bag from moving forward, so that the seat cushion does not deteriorate. In addition, by normally folding the bag enclosure along the upper surface of the seat pan together with the bag, the seat comfort of the seat is not deteriorated due to the bag enclosure.
[0011]
In the occupant protection system according to claim 1, the bag extends in the vehicle width direction, the bag enclosure, it is around the longitudinal middle portion of the bag. As described above, since the bag enclosure is disposed only in the middle portion in the longitudinal direction of the bag, the material for constituting the bag enclosure is small, and it is light weight and economical.
[0012]
In the occupant protection system according to claim 2, the bag extends in the vehicle width direction, the bag enclosure, it is around the substantially entire longitudinal direction of the bag. By such a configuration, the bag because is constrained to evenly seat pan in substantially the entire longitudinal direction thereof, be unequally load is applied from the passenger to the inflated bag, the bag is locally It is prevented from moving forward. In addition, since the bag envelope covers almost the entire bag, the bag can be prevented from being damaged by rubbing or the like.
[0013]
In the occupant protection system of the present invention, the bag envelope is that is connected to the seat pan at a position which is a vehicle rear than the arrangement position of the bag. Thus, the bag enclosure, Ru Ttei Do shall not at all or allows little that bag moving forward.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are perspective views of a frame of a seat provided with an occupant protection device according to an embodiment of claim 1 , and show a state before the bag is inflated and a state when the bag is inflated, respectively. 3 is a sectional view taken along the line III-III in FIG. 1, and FIG. 4 is a sectional view taken along the line IV-IV in FIG.
[0015]
A frame constituting an automobile seat includes a base frame 1 and a back frame 4 rotatably connected to the base frame 1 via a support shaft 2 and a reclining device (not shown). A headrest 6 is attached to the upper portion of the back frame 4. The base frame 1 has left and right side frames 1a and 1b, and a seat pan 8 is installed between the front portions of the side frames 1a and 1b.
[0016]
Although not shown, a seat cushion and a seat back made of urethane or the like are attached to the base frame 1 and the back frame 4. The seat pan 8 is disposed below the front portion of the seat cushion.
[0017]
The occupant protection device 10 includes an inflatable bag 12 disposed on the upper side of the seat pan 8 for pressing the front portion of the seat cushion from the lower side, and a gas generator 14 for inflating the bag 12. And a bag enclosure 16 as a forward movement blocking member of the inflated bag 12. The bag 12 extends in the left-right width direction (vehicle width direction) of the seat pan 8, and both left and right end portions thereof are connected to the seat pan 8 via anchors 18 fixed to the upper surface of the seat pan 8. It is connected to. The gas generator 14 is connected to one end of the bag 12 through a pipe 20.
[0018]
In this embodiment, the upper surface of the seat pan 8 is a concave step portion 8a whose front end side is one step lower by the height of the gas generator 14, and the gas generator 14 has the concave step portion 8a. It is installed inside. Reference numeral 14a in FIG. 1 denotes a bracket for fixing the gas generator 14 in the concave step portion 8a. The pipe 20 is disposed along the upper surface of the seat pan 8.
[0019]
In this embodiment, the bag enclosure 16 is a belt-shaped member made of a flexible sheet material such as a cloth or a synthetic resin sheet. The bag enclosure 16 circulates in the vicinity of the middle in the longitudinal direction of the bag 12, and both end portions thereof are connected to portions of the seat pan 8 that are located behind the vehicle from the position where the bag 12 is disposed. In this embodiment, as shown in FIG. 3 and FIG. 4, the rear end side of the seat pan 8 is a concave step portion 8b that is lowered by one step, and both end portions of the bag enclosure 16 are It is fastened by a rivet 16a in the recessed step portion 8b.
[0020]
Bag envelope 16 This is without tightening the bag 12 when the bag 12 is inflated, and yet has a circumferential length that the bag 12 does not allow this even tries to move toward the front of the vehicle.
[0021]
The bag 12 and the bag enclosure 16 are normally folded along the upper surface of the seat pan 8 as shown in FIG. 1 and FIG.
[0022]
Next, the operation of the occupant protection device 10 will be described.
[0023]
When a frontal collision of the automobile is detected, the gas generator 14 performs gas ejection operation. The gas from the gas generator 14 flows into the bag 12 through the pipe 20 and inflates the bag 12. As a result, the front part of the seat cushion is pushed up or hardened, and the forward movement of the occupant's waist is prevented. At this time, even if a load is applied to the inflated bag 12 through the seat cushion from the occupant, the bag enclosure 16 restrains the bag 12 to the seat pan 8. Therefore, the bag 12 is prevented from moving forward by the load from the passenger.
[0024]
In the occupant protection device 10, the bag 12 is restrained by the seat pan 8 by a bag enclosure 16 disposed so as to surround the bag 12, and the bag 12 is moved forward by the seat pan 8. Since there is no protrusion such as a protrusion for blocking, the sitting comfort of the seat cushion is good. Since the bag enclosure 16 is normally folded flat along the upper surface of the seat pan 8 together with the bag 12, the seat comfort of the seat does not deteriorate due to the bag enclosure 16.
[0025]
In this embodiment, since the bag enclosure 16 is connected to the rear end portion of the seat pan 8 at the rear of the vehicle with respect to the position where the bag 12 is disposed, the bag 12 is moved from the passenger to the inflated bag 12 by the vehicle. Even if a load is applied so as to push forward, the bag enclosure 16 does not allow or hardly allows the bag 12 to move forward.
[0026]
In this embodiment, since the bag enclosure 16 has a strip shape, less material is required to form the bag enclosure.
[0027]
In this embodiment, only one bag enclosure 16 is disposed near the middle of the bag 12 in the longitudinal direction. However, a plurality of bag enclosures 16 are arranged at different positions in the longitudinal direction. You may set up.
[0028]
FIG. 5 (a) is a perspective view of a base frame of a seat provided with an occupant protection device according to the embodiment of claim 2 , and FIG. 5 (b) is a BB line in FIG. 5 (a). FIG.
[0029]
Also in this embodiment, the occupant protection device 10A includes an inflatable bag 12 disposed between a seat cushion (not shown) and the seat pan 8 for pressing the front portion of the seat cushion from below. The gas generator 14 for inflating the bag 12 and a bag enclosure 16A as a forward movement blocking member for the inflated bag 12 are provided. The bag 12 extends in the left-right width direction (vehicle width direction) of the seat pan 8, and both left and right end portions thereof are connected to the seat pan 8 via anchors 18 fixed to the upper surface of the seat pan 8. It is connected to. The gas generator 14 is connected to one end of the bag 12 through a pipe 20.
[0030]
In this embodiment, the bag surrounding body 16 </ b> A has a wide sheet shape that circulates substantially the entire longitudinal direction of the bag 12, for example, an area of about 80% or more of the longitudinal direction of the bag 12. Similarly to the bag enclosure 16 in FIGS. 1 to 4 described above, the bag enclosure 16A does not tighten the bag when the bag 12 is inflated, and the inflated bag 12 tries to move forward. It has a round length that does not allow this. Further, both end portions of the bag enclosure 16A in the circumferential direction are also provided by the rivets 16a in the recessed step portion 8b provided on the rear end side of the seat pan 8 at the rear of the vehicle with respect to the arrangement position of the bag 12. It is fastened to the seat pan 8.
[0031]
Also in this embodiment, the bag enclosure 16A is made of a flexible sheet-like material such as a cloth or a synthetic resin sheet, and normally, along the upper surface of the seat pan 8 together with the bag 12, as shown in the figure. It is folded flat.
[0032]
Other configurations of the occupant protection device 10A are the same as those of the occupant protection device 10 shown in FIGS. 1 to 4. In FIGS. 5 (a) and 5 (b), the same reference numerals as in FIGS. 1 to 4 are used. These parts have the same function.
[0033]
Also in this occupant protection device 10A, when a frontal collision of the automobile is detected, the gas generator 14 performs gas ejection operation, and the bag 12 is inflated by the gas from the gas generator 14, and the front portion of the seat cushion is pushed up. Or become stiff, preventing forward movement of the occupant's waist. At this time, even if a load is applied to the inflated bag 12 from the occupant through the seat cushion, the bag enclosure 16A restrains the bag 12 on the seat pan 8, The bag 12 is prevented from moving forward by the load from the passenger.
[0034]
Even in this occupant protection device 10A, the seat pan 8 is not provided with a protrusion such as a protrusion for preventing the bag 12 from moving forward, so that the seat cushion is comfortable to sit on. Since the bag enclosure 16A is also folded flat along with the bag 12 along the upper surface of the seat pan 8, the seat comfort of the seat does not deteriorate due to the bag enclosure 16A.
[0035]
The bag enclosure 16A is also connected to the rear end portion of the seat pan 8 at the rear of the vehicle relative to the position where the bag 12 is disposed, so that the occupant presses the bag 12 toward the front of the vehicle against the inflated bag 12. Even when a load is applied, the bag enclosure 16A does not allow or hardly allows the bag 12 to move forward.
[0036]
In this embodiment, the bag enclosure 16A has a wide sheet shape that circulates substantially the entire length of the bag 12 in the longitudinal direction. As a result, the bag 12 is evenly restrained by the seat pan 8 in substantially the entire longitudinal direction thereof, so that even if a load is applied to the inflated bag 12 from an occupant unevenly, the bag 12 is locally moved forward. It is prevented from moving. In addition, since the bag envelope 16A covers almost the entire bag 12, damage to the bag 12 due to abrasion or the like can be prevented.
[0037]
In each of the above embodiments, the bag enclosure is made of a flexible sheet material such as a cloth or a synthetic resin sheet, but may be made of a hard metal plate or the like. In this case, although not shown, the metal plate is folded in half and a flatly folded bag is sandwiched between them, and both ends of the metal plate are fixed to the seat pan with bolts, rivets or the like. When the bag is inflated, the metal plate is plastically deformed and expanded by the inflation pressure of the bag, and pushes up the seat cushion.
[0038]
When a load is applied from the occupant through the seat cushion, the metal plate gradually shrinks and deforms plastically, and the kinetic energy of the occupant is absorbed by the plastic deformation.
[0039]
In addition to the metal plate folded in half, two separate metal plates may be stacked and the bag may be sandwiched between them. After passing the bag through the metal tube, the metal tube is pressed. The bag may be sandwiched. Of course, other configurations are possible.
[0040]
Each of the above embodiments shows an example of the present invention, and the present invention is not limited to the illustrated embodiment.
[0041]
【The invention's effect】
As described above, in the occupant protection device of the present invention, the bag inflated at the time of the front collision is reliably prevented from moving forward due to the load from the occupant, and the seat cushion may be less comfortable to sit on. Absent.
[Brief description of the drawings]
FIG. 1 is a perspective view of a seat frame including an occupant protection device according to an embodiment.
FIG. 2 is a perspective view of a seat frame in a bag inflated state.
FIG. 3 is a cross-sectional view taken along line III-III in FIG.
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is a configuration diagram of an occupant protection device according to another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base frame 1a, 1b Side frame 4 Back frame 6 Headrest 8 Seat pan 10, 10A Crew protection device 12 Bag 14 Gas generator 16, 16A Bag enclosure 18 Anchor 20 Pipe

Claims (5)

An inflatable bag disposed between the seat cushion and the seat pan for pressing the front portion of the seat cushion from below;
A gas generator for inflating the bag in a vehicle emergency;
In the occupant protection device having a forward movement blocking member that blocks the inflated bag from moving forward of the vehicle,
The seat pan is not provided with a protrusion on the front side of the bag to prevent the bag from moving forward,
The forward movement blocking member is a bag enclosure surrounding the bag and connected to the seat pan ;
The bag extends in the vehicle width direction,
The bag enclosure is in the form of a belt, and circulates in the middle in the longitudinal direction of the bag,
The bag enclosure is connected to the seat pan at a position at the rear of the vehicle relative to the arrangement position of the bag,
The bag enclosure does not clamp the bag when the bag is inflated, and has an orbital length that does not allow the bag to move forward of the vehicle. apparatus. An inflatable bag disposed between the seat cushion and the seat pan for pressing the front portion of the seat cushion from below;
A gas generator for inflating the bag in a vehicle emergency;
A forward movement blocking member for blocking forward movement of the inflated bag;
In an occupant protection device having
The seat pan is not provided with a protrusion on the front side of the bag to prevent the bag from moving forward,
The forward movement blocking member is a bag enclosure surrounding the bag and connected to the seat pan;
The bag extends in the vehicle width direction,
The bag enclosure is in the form of a wide sheet, and circulates substantially the entire longitudinal direction of the bag,
The bag enclosure is connected to the seat pan at a position at the rear of the vehicle relative to the arrangement position of the bag,
The bag enclosure does not clamp the bag when the bag is inflated, and has a lap length that does not allow the bag to move forward of the vehicle. apparatus. 3. The occupant protection device according to claim 2, wherein the bag enclosure has a width that goes around an area of 80% or more in the longitudinal direction of the bag. The occupant protection device according to any one of claims 1 to 3, wherein the bag enclosure is made of a flexible sheet material. The occupant protection device according to any one of claims 1 to 3, wherein the bag enclosure is formed of a metal plate.

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