WO2015145285A1 - Seat assembly with air bag - Google Patents
Seat assembly with air bag Download PDFInfo
- Publication number
- WO2015145285A1 WO2015145285A1 PCT/IB2015/051771 IB2015051771W WO2015145285A1 WO 2015145285 A1 WO2015145285 A1 WO 2015145285A1 IB 2015051771 W IB2015051771 W IB 2015051771W WO 2015145285 A1 WO2015145285 A1 WO 2015145285A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seat
- airbag
- backrest portion
- assembly according
- seat assembly
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/23138—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/207—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in vehicle seats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/237—Inflatable members characterised by the way they are folded
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R2021/003—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks characterised by occupant or pedestian
- B60R2021/0039—Body parts of the occupant or pedestrian affected by the accident
- B60R2021/0041—Arms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R2021/003—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks characterised by occupant or pedestian
- B60R2021/0039—Body parts of the occupant or pedestrian affected by the accident
- B60R2021/0044—Chest
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R2021/003—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks characterised by occupant or pedestian
- B60R2021/0039—Body parts of the occupant or pedestrian affected by the accident
- B60R2021/0048—Head
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R2021/003—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks characterised by occupant or pedestian
- B60R2021/0039—Body parts of the occupant or pedestrian affected by the accident
- B60R2021/0055—Pelvis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R2021/003—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks characterised by occupant or pedestian
- B60R2021/0039—Body parts of the occupant or pedestrian affected by the accident
- B60R2021/0058—Shoulders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R2021/23107—Inflatable members characterised by their shape, construction or spatial configuration the bag being integrated in a multi-bag system
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/23138—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection
- B60R2021/23146—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection seat mounted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R2021/23153—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for rear seat passengers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R2021/23161—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for protecting at least two passengers, e.g. preventing them from hitting each other
Definitions
- the present invention relates to a seat assembly for a motor vehicle, of the type comprising:
- a seat which is mounted on said supporting structure and comprises a sitting portion and a backrest portion;
- an airbag unit comprising at least one airbag, which is folded into a housing provided in said seat assembly and is inflatable into an expanded condition outside said housing.
- various types of airbags can be installed on a motor vehicle, amongst which, to cite just a few, airbags for the front seats, which exit from the dashboard of the motor vehicle, airbags for the rear seats, which exit from the backrests of the front seats, side airbags, which exit from the doors, and top airbags or curtain airbags, which exit from the top of the door openings.
- the various types of airbags differ from one another first of all as regards the shape and size of the "cushion" or bag, as well as for the different calibration and different positioning of the sensors that activate them.
- the object of the present invention is to provide a seat assembly equipped with airbags that will meet the needs referred to above. This object is achieved via a seat assembly having the characteristics specified in the claims. As will be seen in what follows, the seat assembly described herein is particularly suited for use on so-called "city cars”.
- FIG. 1 illustrates a schematic side view of the passenger compartment of a car in which the seat assembly described herein is installed and in which the airbag unit of the seat assembly is in an activated condition;
- Figure 2 illustrates a front view of the passenger compartment of Figure 1 ;
- Figures 3 and 4 are, respectively, a front view and a rear view of the passenger compartment of Figure 1 ;
- Figure 5 illustrates a detail of the seat assembly described herein, in which the airbag unit is in an activated condition.
- Figures 1 to 4 illustrate the passenger compartment of a car in which there is a single, central, front seat for the driver, and two rear seats for the passengers.
- This configuration of passenger compartment may, for example, be provided on a car of small dimensions, a so-called "city car", suited for transporting at most three passengers.
- the seat assembly described herein comes to define the central front seat. It is evident that the seat assembly described herein can also be installed on any other type of passenger compartment, so that the example illustrated is not to be considered as in any way limiting the sphere of application of the seat assembly in question. In any case, as will be seen in what follows, in the type of application illustrated, the seat assembly described herein affords particular advantages that will become evident in what follows.
- the seat assembly described herein comprises :
- a seat 4 which is mounted on the supporting structure and comprises a sitting portion 4A and a backrest portion 4B;
- an airbag unit comprising at least one airbag
- the airbag unit moreover comprises:
- an electronic control unit provided for receiving and processing the control signal coming from the sensor and configured for sending a command for triggering an activation device;
- an activation device also known as “detonator” or “trigger” for detonating the substances (e.g., sodium nitride) contained in an explosive capsule; and - an explosive capsule, explosion of which develops a large amount of gas that inflates the cushion or bag.
- detonator also known as "detonator” or “trigger” for detonating the substances (e.g., sodium nitride) contained in an explosive capsule
- an explosive capsule explosion of which develops a large amount of gas that inflates the cushion or bag.
- the sensors and the control unit are physically located in positions separate from the seat and, in particular, the sensors are arranged in various points of the vehicle to enable detection of any possible impact on different points of the bodywork.
- the airbag unit comprises a bag, or else a plurality of bags, having a conformation such that, in the expanded condition, the single bag, or else the plurality of bags together, defines/define a protection wall that surrounds the backrest portion of the seat.
- the single bag, or else the plurality of bags defines/define a protection wall having a front portion, set facing the backrest portion, a rear portion, set behind to the backrest portion, and opposite lateral portions, set at the opposite sides of the backrest portion.
- the bag or bags of the airbag unit of the seat assembly described herein define as a whole a protective cushion that surrounds completely the passenger' s upper body and head so as to protect the passenger from contact with the parts of the vehicle, whatever the direction of the impact undergone by the latter.
- the airbag unit comprises, specifically, a first bag 12A and a second bag 12B, which have respective conformations such as to together define, in the expanded condition, the protection wall referred to above.
- the first bag 12A and the second bag 12B define, in the expanded condition, two opposed walls 12', each of which is C- shaped in plan view and which come into mutual contact at their opposite end edges 121' .
- these walls are oriented, with respect to the seat, so that the edges 121' are in mutual contact along a plane transverse to the sitting portion and to the backrest portion of the seat.
- the walls in question each have a central portion 122', which is set facing the sides of the backrest portion and the space in front of the latter, at least for a part corresponding to the region of the sitting portion that is immediately adjacent to the backrest portion and extends in height by an amount at least equal to the height of the portion of the backrest.
- Each wall moreover has opposite lateral portions 124a' , 124b' , which extend from the central portion with a curvilinear profile so that the edges 121' are oriented in a direction substantially orthogonal to the direction of the central portion 122'.
- the front lateral portions 124a' together define a protection portion designed to protect the passenger frontally, this portion being of a height such as to be able to shield the passenger's upper body and head.
- the rear lateral portions 124b' define, instead, a rear protection portion, having a height such as to cover the rear side of the backrest portion completely.
- the walls 122' have a top edge 128' descending forwards, following a path such that it comes into contact with the roof of the passenger compartment and follows the profile of the parts of this with which it is in contact (see Figure 1) .
- the front lateral portions 124a' of the walls have a bottom edge 132' rising towards the centre, in the direction of the opposed portion so as to provide a vertical space for the passenger' s legs between said portion and the resting surface of the sitting portion of the seat (see Figure 3) .
- the housings of the seat assembly that are to receive the two airbags in the folded condition are preferably provided in the supporting structure of the seat assembly. Preferably, they have a conformation in plan view that reproduces the C shape of the two bags, and evidently define an internal volume suited to receiving the two airbags in their folded condition.
- the specific structure of the housings and the way in which the airbags are folded in these housings may be obtained according to the teachings already known in the technical field in question, and consequently will not be described in detail herein.
- the protective cushion defined by the airbag unit - designated as a whole by the reference number 101 - is in itself able to protect not only the passenger sitting on the seat assembly itself, but also the passengers sitting on the rear seat. In particular, it is able to protect these passengers frontally, protecting their head, upper body, and legs.
- the seat assembly is set in the passenger compartment substantially centred with respect to the longitudinal axis of the passenger compartment itself and to the fact that the cushion of its airbag unit defines, in the expanded condition, a rear portion having a height such as to cover the rear side of the backrest portion completely, and a width substantially corresponding to the width of the sitting portion of the rear seat.
- the seat assembly described herein may moreover comprise a further airbag unit integrated in the headrest of the seat.
- Figure 5 illustrates, in the expanded condition, an example of the airbag, with which the airbag unit in question is equipped; this bag - designated by the reference 14 - has a central horizontal portion 14A, designed to cover the area above the passenger' s head, and two side flaps 14B, extending downwards, which, instead, are designed to protect the passenger's face laterally.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
Seat assembly for a motor vehicle, comprising: - a supporting structure (2), designed to be mounted on the floor panel of the motor vehicle; - a seat (4), which is mounted on the supporting structure and comprises a sitting portion (4A) and a backrest portion (4B); and - an airbag unit, comprising at least one airbag (12A, 12B), which is folded into a housing provided in said seat assembly and is inflatable into an expanded condition outside the aforesaid housing whereby the at least one airbag (12A, 12B) has a conformation such that, in the expanded condition, it identifies a protection wall that surrounds the backrest portion (4B) of the seat.
Description
SEAT ASSEMBLY WITH AIR BAG
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TEXT OF THE DESCRIPTION
Field of the invention
The present invention relates to a seat assembly for a motor vehicle, of the type comprising:
- a supporting structure, designed to be mounted on the floor panel of a motor vehicle;
a seat, which is mounted on said supporting structure and comprises a sitting portion and a backrest portion; and
- an airbag unit, comprising at least one airbag, which is folded into a housing provided in said seat assembly and is inflatable into an expanded condition outside said housing.
Prior art
As is known, various types of airbags can be installed on a motor vehicle, amongst which, to cite just a few, airbags for the front seats, which exit from the dashboard of the motor vehicle, airbags for the rear seats, which exit from the backrests of the front seats, side airbags, which exit from the doors, and top airbags or curtain airbags, which exit from the top of the door openings. The various types of airbags differ from one another first of all as regards the shape and size of the "cushion" or bag, as well as for the different calibration and different positioning of the sensors that activate them.
It is clear that the greater the number of types of airbags combined together inside the passenger compartment, the higher the level of safety that is reached. However, the higher the number of airbags, the higher the costs of production of the motor vehicle, on account, of course, of the number of airbags, but also on account of having to arrange the different parts of
the passenger compartment that are to receive them appropriately .
For the above reasons, in the past only upper- range vehicles were provided with a complete airbag equipment, whereas lower-range models of motor vehicles presented a lower number of airbags, for example just the front and side airbags.
Today, a high degree of safety is, however, required also for motor vehicles belonging to the segments of city cars and family cars of small and medium size. As regards this type of motor vehicles, there is hence a constant need for new systems that will be, on the one hand, able to guarantee a high degree of safety and, on the other hand, will at the same time present structures that are relatively simple and have low production costs.
Object of the invention
In the above context, the object of the present invention is to provide a seat assembly equipped with airbags that will meet the needs referred to above. This object is achieved via a seat assembly having the characteristics specified in the claims. As will be seen in what follows, the seat assembly described herein is particularly suited for use on so-called "city cars".
The claims form an integral part of the technical teaching provided herein in relation to the invention.
Brief description of the drawings
Further characteristics and advantages of the invention will emerge clearly from the ensuing description, with reference to the annexed drawings, which are provided purely by way of non-limiting example and in which:
- Figure 1 illustrates a schematic side view of the passenger compartment of a car in which the seat
assembly described herein is installed and in which the airbag unit of the seat assembly is in an activated condition;
Figure 2 illustrates a front view of the passenger compartment of Figure 1 ;
- Figures 3 and 4 are, respectively, a front view and a rear view of the passenger compartment of Figure 1 ; and
Figure 5 illustrates a detail of the seat assembly described herein, in which the airbag unit is in an activated condition.
In the ensuing description, various specific details are illustrated aimed at providing an in-depth understanding of the embodiments. The embodiments may be obtained without one or more of the specific details, or with other methods, components, materials, etc. In other cases, known structures, materials, or operations are not illustrated or described in detail herein so that various aspects of the embodiment will not be obscured.
The references used herein are provided merely for convenience and hence do not define the sphere of protection or the scope of the embodiments.
Figures 1 to 4 illustrate the passenger compartment of a car in which there is a single, central, front seat for the driver, and two rear seats for the passengers. This configuration of passenger compartment may, for example, be provided on a car of small dimensions, a so-called "city car", suited for transporting at most three passengers.
In the example illustrated, the seat assembly described herein, designated by the reference number 100, comes to define the central front seat. It is evident that the seat assembly described herein can also be installed on any other type of passenger
compartment, so that the example illustrated is not to be considered as in any way limiting the sphere of application of the seat assembly in question. In any case, as will be seen in what follows, in the type of application illustrated, the seat assembly described herein affords particular advantages that will become evident in what follows.
In general, the seat assembly described herein comprises :
- a supporting structure 2, designed to be mounted on the floor panel of the car;
- a seat 4, which is mounted on the supporting structure and comprises a sitting portion 4A and a backrest portion 4B; and
- an airbag unit, comprising at least one airbag
12, which is folded into a housing provided in said seat assembly and is inflatable into an expanded condition outside said housing.
The airbag unit moreover comprises:
- one or more sensors, for detecting a sharp deceleration of the motor vehicle due to impact and for generating a control signal;
- an electronic control unit (ECU) , provided for receiving and processing the control signal coming from the sensor and configured for sending a command for triggering an activation device;
- an activation device, also known as "detonator" or "trigger", for detonating the substances (e.g., sodium nitride) contained in an explosive capsule; and - an explosive capsule, explosion of which develops a large amount of gas that inflates the cushion or bag.
Clearly, the sensors and the control unit are physically located in positions separate from the seat and, in particular, the sensors are arranged in various
points of the vehicle to enable detection of any possible impact on different points of the bodywork.
It should in any case be noted that the above characteristics do not regard the innovative aspects of the seat assembly described herein and consequently will not be described in detail. The characteristics in question may hence be obtained according to any modality known to the person skilled in the sector.
An important characteristic of the seat assembly described herein lies, instead, in the fact that the airbag unit comprises a bag, or else a plurality of bags, having a conformation such that, in the expanded condition, the single bag, or else the plurality of bags together, defines/define a protection wall that surrounds the backrest portion of the seat. In particular, in the expanded condition the single bag, or else the plurality of bags, defines/define a protection wall having a front portion, set facing the backrest portion, a rear portion, set behind to the backrest portion, and opposite lateral portions, set at the opposite sides of the backrest portion.
As may be seen in the example illustrated in the figures, thanks to this characteristic, in the expanded condition the bag or bags of the airbag unit of the seat assembly described herein define as a whole a protective cushion that surrounds completely the passenger' s upper body and head so as to protect the passenger from contact with the parts of the vehicle, whatever the direction of the impact undergone by the latter.
In various preferred embodiments, as in the one illustrated, the airbag unit comprises, specifically, a first bag 12A and a second bag 12B, which have respective conformations such as to together define, in the expanded condition, the protection wall referred to
above. In various preferred embodiments, as in the one illustrated (see in particular Figure 2), the first bag 12A and the second bag 12B define, in the expanded condition, two opposed walls 12', each of which is C- shaped in plan view and which come into mutual contact at their opposite end edges 121' . In even more preferred embodiments, these walls are oriented, with respect to the seat, so that the edges 121' are in mutual contact along a plane transverse to the sitting portion and to the backrest portion of the seat. In various embodiments, the walls in question each have a central portion 122', which is set facing the sides of the backrest portion and the space in front of the latter, at least for a part corresponding to the region of the sitting portion that is immediately adjacent to the backrest portion and extends in height by an amount at least equal to the height of the portion of the backrest. Each wall moreover has opposite lateral portions 124a' , 124b' , which extend from the central portion with a curvilinear profile so that the edges 121' are oriented in a direction substantially orthogonal to the direction of the central portion 122'. The front lateral portions 124a' together define a protection portion designed to protect the passenger frontally, this portion being of a height such as to be able to shield the passenger's upper body and head. The rear lateral portions 124b' define, instead, a rear protection portion, having a height such as to cover the rear side of the backrest portion completely.
In various preferred embodiments, starting from an intermediate area of the central portion, the walls 122' have a top edge 128' descending forwards, following a path such that it comes into contact with the roof of the passenger compartment and follows the profile of the parts of this with which it is in
contact (see Figure 1) . Moreover, the front lateral portions 124a' of the walls have a bottom edge 132' rising towards the centre, in the direction of the opposed portion so as to provide a vertical space for the passenger' s legs between said portion and the resting surface of the sitting portion of the seat (see Figure 3) .
It should be noted that the configuration just described can in any case be obtained also with a single bag, for example a bag of a tubular shape that closes on itself at opposed end edges, set in the front portion of the protection wall thus obtained.
The housings of the seat assembly that are to receive the two airbags in the folded condition are preferably provided in the supporting structure of the seat assembly. Preferably, they have a conformation in plan view that reproduces the C shape of the two bags, and evidently define an internal volume suited to receiving the two airbags in their folded condition. The specific structure of the housings and the way in which the airbags are folded in these housings, may be obtained according to the teachings already known in the technical field in question, and consequently will not be described in detail herein.
With reference once again to the example illustrated in the figures, it may be noted how in this application of the seat assembly, the protective cushion defined by the airbag unit - designated as a whole by the reference number 101 - is in itself able to protect not only the passenger sitting on the seat assembly itself, but also the passengers sitting on the rear seat. In particular, it is able to protect these passengers frontally, protecting their head, upper body, and legs. This is made possible thanks to the fact that the seat assembly is set in the passenger
compartment substantially centred with respect to the longitudinal axis of the passenger compartment itself and to the fact that the cushion of its airbag unit defines, in the expanded condition, a rear portion having a height such as to cover the rear side of the backrest portion completely, and a width substantially corresponding to the width of the sitting portion of the rear seat.
In the light of the foregoing, it is consequently evident how the airbag unit of the seat assembly described herein is able to guarantee a high level of safety within the passenger compartment, albeit with a simple and inexpensive structure.
In various embodiments, the seat assembly described herein may moreover comprise a further airbag unit integrated in the headrest of the seat. Figure 5 illustrates, in the expanded condition, an example of the airbag, with which the airbag unit in question is equipped; this bag - designated by the reference 14 - has a central horizontal portion 14A, designed to cover the area above the passenger' s head, and two side flaps 14B, extending downwards, which, instead, are designed to protect the passenger's face laterally.
Of course, without prejudice to the principle of the invention, the details of construction and the embodiments may vary, even significantly, with respect to what has been illustrated herein purely by way of non-limiting example, without thereby departing from the scope of the invention, as defined by the annexed claims.
Claims
1. A seat assembly for a motor vehicle, of the type comprising:
- a supporting structure (2), designed to be mounted on the floor panel of the motor vehicle;
- a seat (4), which is mounted on the supporting structure and comprises a sitting portion (4A) and a backrest portion (4B); and
- an airbag unit, comprising at least one airbag
(12A, 12B) , which is folded into a housing provided in said seat assembly and is inflatable into an expanded condition outside said housing,
said assembly being characterized in that:
said at least one airbag (12A, 12B) has a conformation such that, in its expanded condition, it identifies a protection wall that surrounds said backrest portion (4B) .
2. The assembly according to Claim 1, wherein in said expanded condition said at least one airbag (12A,
12B) defines a protection wall having a front portion, set facing said backrest portion, a rear portion, set behind said backrest portion, and two opposite lateral portions, set at the opposite sides of said backrest portion.
3 . The assembly according to Claim 2, wherein said airbag unit comprises a first airbag (12A) and a second airbag (12B), which define in the expanded condition two opposed walls (12'), each being C-shaped in plan view, which come into mutual contact at their opposite end edges (121') .
4. The assembly according to Claim 3, wherein said walls (12') are oriented, with respect to the seat, so that said end edges (121') are in mutual contact along a plane transverse to the sitting portion (4A) and to
the backrest portion (4B) of said seat.
5. The assembly according to Claim 3 or Claim 4, wherein said walls (12') each have a central portion (122'), which is set facing the sides of the backrest portion and the space in front of the latter, at least for a part corresponding to the region of said sitting portion immediately adjacent to said backrest portion, and which extends in height by an amount at least equal to the height of said backrest portion.
6 . The assembly according to Claim 5, wherein said walls (12') each have opposite front lateral portions (124a') and rear lateral portions (124b'), which extend from said central portion with a curvilinear profile so that said edges (121') are oriented in a direction substantially orthogonal to the direction of said central portion (122') .
7. The assembly according to Claim 6, wherein the front lateral portions (124a') of said walls together define said front portion of said protection wall, whereas the rear lateral portions (124b') of said walls together define said rear portion of said protection wall .
8. The assembly according to any one of Claims 2 to 7, wherein said front portion of said protection wall has a height such as to be able to shield at the front the passenger' s upper body and head, or wherein said rear portion of said protection wall has a height such as to cover completely the rear side of said backrest portion.
9 . The assembly according to Claim 7, wherein said front lateral portions (124a') each have a bottom edge (132') rising in the direction of the opposed portion so as to provide a vertical space for the passenger' s legs between said portions and the resting surface of said sitting portion.
10. A passenger compartment of a motor vehicle, comprising a front seat assembly, the seat of which is set substantially centred with respect to a longitudinal axis of symmetry of the passenger compartment, and a rear seat assembly, the seat of which is also set substantially centred with respect to said axis of symmetry of the passenger compartment, wherein said front seat assembly is obtained according to any one of the preceding claims.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/129,685 US9981624B2 (en) | 2014-03-27 | 2015-03-11 | Seat assembly with air bag |
CN201580022181.0A CN106255624A (en) | 2014-03-27 | 2015-03-11 | There is the seat-assembly of air bag |
EP15711877.9A EP3122600A1 (en) | 2014-03-27 | 2015-03-11 | Seat assembly with air bag |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITTO2014A000258 | 2014-03-27 | ||
ITTO20140258 | 2014-03-27 |
Publications (1)
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WO2015145285A1 true WO2015145285A1 (en) | 2015-10-01 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2015/051771 WO2015145285A1 (en) | 2014-03-27 | 2015-03-11 | Seat assembly with air bag |
Country Status (4)
Country | Link |
---|---|
US (1) | US9981624B2 (en) |
EP (1) | EP3122600A1 (en) |
CN (1) | CN106255624A (en) |
WO (1) | WO2015145285A1 (en) |
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Also Published As
Publication number | Publication date |
---|---|
US9981624B2 (en) | 2018-05-29 |
EP3122600A1 (en) | 2017-02-01 |
US20170144622A1 (en) | 2017-05-25 |
CN106255624A (en) | 2016-12-21 |
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