1. A seat airbag for a vehicle, which is provided on a side surface portion of a seat back and in which a cushion is deployed forward, and in which a front portion of the cushion is divided into a head chamber disposed at an upper portion, a chest chamber disposed at a center, and a pelvis chamber disposed at a lower portion,

the seat airbag includes:

a 1 st tying belt, one end of which is fixed on the backrest and the other end of which is connected with the upper part of the chest cavity;

a 2 nd tether belt, one end of which is connected with the other end of the 1 st tether belt, and the other end of which extends downwards and is connected with the lower part of the chest cavity; and

and a 3 rd tether having one end connected to the other end of the 2 nd tether and the other end extended rearward and fixed to the inflator.

2. A seat airbag for a vehicle according to claim 1,

the 1 st to 3 rd tethers have a rope shape integrally connected, the other end of the 1 st tether passes through a first hole in the upper part of the chest chamber, and the other end of the 2 nd tether passes through a second hole in the lower part of the chest chamber.

3. A seat airbag for a vehicle according to claim 1,

one end of the No. 1 tether is fixed to the seat back frame side.

4. A seat airbag for a vehicle according to claim 1,

a head dead zone is formed in the head cavity, the other end of the No. 1 tether is fixed in the head dead zone, one end of the No. 1-1 tether is fixed in the head dead zone, the other end of the No. 1-1 tether is connected to the upper part of the chest cavity, and one end of the No. 2 tether is connected to the other end of the No. 1-1 tether.

5. The seat airbag for a vehicle according to claim 4,

the 1 st-1 tether is disposed on the inner side of the occupant side of the cushion, the 2 nd tether is disposed on the outer side of the cushion, and the 3 rd tether is disposed on the inner side of the cushion.

6. A seat airbag for a vehicle according to claim 1,

a chest dead zone in a shape of a groove depressed toward the center is formed at an upper portion of the chest chamber, and the chest chamber is pulled by the 1 st tether and a front portion of the chest chamber is bent toward the passenger chest side with the chest dead zone as a reference when the airbag is deployed.

7. The seat airbag for a vehicle according to claim 4,

a third hole is formed in the rear of the head chamber, the 1 st tether is bent after passing through the third hole, and the other end of the 1 st tether is fixed to the dead head region.

8. The seat airbag for a vehicle according to claim 4,

a third hole is formed at the rear of the head chamber, a 1 st tether passes through the third hole and then has the other end fixed to the upper portion of the head chamber, one end of a 1 st-1 st tether is fixed to the upper portion of the head chamber, the other end of a 1 st-1 st tether is connected to the upper portion of the chest chamber, and one end of a 2 nd tether is connected to the other end of the 1 st-1 st tether.

9. The seat airbag for a vehicle according to claim 8,

a protrusion protruding upward is formed at the upper portion of the head chamber, the other end of the 1 st tether is fixed to the front portion of the protrusion, and one end of the 1 st-1 st tether is fixed to the front portion of the protrusion.

10. The seat airbag for a vehicle according to claim 4,

the other end of the 1 st tether is fixed to the upper portion of the head chamber, one end of the 1 st-1 st tether is fixed to the upper portion of the head chamber, the other end of the 1 st-1 st tether is connected to the upper portion of the chest chamber, and one end of the 2 nd tether is connected to the other end of the 1 st-1 st tether.

11. The seat airbag for a vehicle according to claim 8,

one end of the 2 nd tether is connected with the other end of the 1 st-1 st tether, the other end of the 2 nd tether is connected with the lower part of the pelvis chamber, one end of the 3 rd tether is connected with the lower part of the pelvis chamber, and the other end of the 3 rd tether is fixed on the side of the inflator.

12. The seat airbag for a vehicle according to claim 11,

the 1 st-1 st, 2 nd and 3 rd tethers have a rope shape integrally connected and sequentially pass through a first hole in an upper portion of the chest chamber, a second hole in a lower portion of the chest chamber, and a 4 th hole in a lower portion of the pelvis chamber.

13. The seat airbag for a vehicle according to claim 11,

the 1 st tether is disposed on the outside of the cushion, the 1 st-1 tether is disposed on the inside of the cushion, the 2 nd tether is disposed on the outside of the cushion, and the 3 rd tether is disposed on the inside of the cushion.

14. A seat airbag for a vehicle according to claim 1,

all or a part of the region from the 1 st tether to the 3 rd tether is formed of a material having elasticity.

15. A seat airbag for a vehicle according to claim 1,

the lower end of the head chamber and the upper end of the pelvis chamber are connected to each other, and the chest chamber is centrally formed in a shape curved toward the passenger.

Background

Autonomous vehicles generally have a freely rotatable seat structure to enable passengers seated in front and rear seats to face each other. Therefore, in this case, the conventional airbag that restrains the passenger at a fixed position to protect the passenger from the collision may run the risk of not sufficiently performing its function.

Therefore, for an automatically driven vehicle or the like, it is necessary to provide an airbag in the seat itself so that the corresponding airbag sufficiently protects the passenger, and it is necessary to apply the above airbag in a conventional vehicle other than the automatically driven vehicle, reduce the number of a plurality of airbags provided at respective positions to reduce the manufacturing cost, and directly restrain the passenger on the seat so as to more effectively protect the passenger.

The contents described as the background art above are only for improving understanding of the background of the present invention and should not be understood as belonging to the prior art previously known to those of ordinary skill in the art.

Documents of the prior art

Patent document

(patent document 1) US 9403500B 2

Disclosure of Invention

Technical problem to be solved

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a new concept of a vehicle seat airbag that is provided in a vehicle seat and that is deployed to the side of an occupant while protecting the head, chest, and pelvis of the occupant, unlike a conventional seat side airbag.

(II) technical scheme

A seat airbag for a vehicle according to the present invention for achieving the above object, which is provided at a side surface portion of a seat back and in which a cushion is deployed forward and a front portion of the cushion is divided into a head chamber disposed at an upper portion, a chest chamber disposed at a center, and a pelvis chamber disposed at a lower portion, includes: a 1 st tether, one end of which is fixed on the backrest and the other end of which is connected with the upper part of the chest cavity; a 2 nd tether belt, one end of which is connected with the other end of the 1 st tether belt, and the other end of which extends downwards and is connected with the lower part of the chest cavity; and a 3 rd tether having one end connected to the other end of the 2 nd tether and the other end extended rearward and fixed to the inflator.

The 1 st to 3 rd tethers have a rope shape integrally connected, and the other end of the 1 st tether may pass through a first hole in the upper part of the chest chamber and the other end of the 2 nd tether may pass through a second hole in the lower part of the chest chamber.

One end of the 1 st tether may be fixed to the seat back frame side.

A head dead zone may be formed in the head chamber, the other end of the 1 st tether may be fixed in the head dead zone, one end of the 1 st-1 st tether may be fixed in the head dead zone, the other end of the 1 st-1 st tether may be connected to an upper portion of the thorax chamber, and one end of the 2 nd tether may be connected to the other end of the 1 st-1 st tether.

The 1 st-1 tether may be disposed on the inner side of the occupant side of the cushion, the 2 nd tether may be disposed on the outer side of the cushion, and the 3 rd tether may be disposed on the inner side of the cushion.

A chest dead zone in a shape of a groove depressed toward the center may be formed at an upper portion of the chest chamber, the chest chamber may be pulled by the 1 st tether when the airbag is deployed, and a front portion of the chest chamber may be bent toward a passenger chest side with the chest dead zone as a reference.

A third hole may be formed at the rear of the head chamber, the 1 st tether strap may be bent after passing through the third hole, and the other end of the 1 st tether strap may be fixed at the dead head region.

A third hole may be formed at the rear of the head chamber, and the 1 st tether may be fixed at the upper portion of the head chamber after passing through the third hole, and one end of the 1 st-1 st tether may be fixed at the upper portion of the head chamber, and the other end of the 1 st-1 st tether may be connected at the upper portion of the thorax chamber, and one end of the 2 nd tether may be connected at the other end of the 1 st-1 st tether.

A protrusion protruding upward may be formed at an upper portion of the head chamber, the other end of the 1 st tether may be fixed to a front portion of the protrusion, and one end of the 1 st-1 st tether may be fixed to a front portion of the protrusion.

The other end of the 1 st tether may be fixed to the upper portion of the head chamber, one end of the 1 st-1 st tether may be fixed to the upper portion of the head chamber, the other end of the 1 st-1 st tether may be connected to the upper portion of the thorax chamber, and one end of the 2 nd tether may be connected to the other end of the 1 st-1 st tether.

One end of the 2 nd tether may be connected to the other end of the 1 st-1 st tether, the other end of the 2 nd tether may be connected to the lower portion of the pelvic cavity, one end of the 3 rd tether may be connected to the lower portion of the pelvic cavity, and the other end of the 3 rd tether may be fixed to the inflator side.

The 1 st-1, 2 nd, and 3 rd tethers may have a rope shape integrally connected, and may pass through a first hole of an upper portion of the chest chamber, a second hole of a lower portion of the chest chamber, and a 4 th hole of a lower portion of the pelvis chamber in this order.

The 1 st tether may be disposed on the outside of the cushion, the 1 st-1 tether may be disposed on the inside of the cushion, the 2 nd tether may be disposed on the outside of the cushion, and the 3 rd tether may be disposed on the inside of the cushion.

All or a part of the region from the 1 st tether to the 3 rd tether may be formed of a material having elasticity.

The lower end of the head chamber and the upper end of the pelvis chamber may be connected to each other, and the chest chamber may be centrally formed in a shape curved toward the passenger.

(III) advantageous effects

According to the vehicle seat airbag of the present invention, it is possible to provide a new concept of a vehicle seat airbag that is provided in a vehicle seat and that is deployed to the side of an occupant while protecting the head, chest, and pelvis of the occupant, unlike an existing seat side airbag.

Drawings

Fig. 1 to 6 are views illustrating a seat airbag of a vehicle according to various embodiments of the present invention.

Fig. 7 is a diagram showing a shape in which a seat airbag of the vehicle shown in fig. 6 is deployed.

Description of the reference numerals

100: 120 of the cushion: air pump

140: head chamber 160: chest cavity

180: pelvic chamber T1: no. 1 tether

T2: tether T3: no. 3 tether

Detailed Description

Fig. 1 to 6 are views illustrating a seat airbag of a vehicle according to various embodiments of the present invention, and fig. 7 is a view illustrating a shape in which the seat airbag of the vehicle illustrated in fig. 6 is deployed.

A seat airbag for a vehicle according to the present invention is provided at a side surface portion of a seat back, and includes a cushion 100 that is deployed forward, a front portion of which is divided into a head chamber 140 disposed above, a chest chamber 160 disposed at a center, and a pelvis chamber 180 disposed below, the seat airbag for a vehicle including: a 1 st tether T1 having one end fixed to a seat back (not shown) and the other end connected to an upper portion of the chest chamber 160; a 2 nd tether T2 having one end connected to the other end of the 1 st tether T1 and the other end extending downward and connected to the lower portion of the thoracic cavity 160; and a 3 rd tether T3 having one end connected to the other end of the 2 nd tether T2 and the other end extended rearward and fixed to the inflator 120.

An airbag of the present invention is provided on a side surface portion of a seat back of a vehicle. The airbag of the present invention is effective in that the seat is freely rotated in the case of an autonomous vehicle, and is also effective in that a plurality of airbags do not need to be installed in the case of an existing conventional vehicle, and is more effective in protecting the passenger in that the airbag in the seat protects the passenger in such a manner as to wrap the passenger.

Specifically, the airbag of the present invention is provided on a frame of a seat back, and has a form in which a cushion is deployed forward from the side of the seat back by an inflator 120. Also, as shown in FIG. 1, although the expanded portion of the cushion 100 has a single volume, the front portion thereof is divided into three chambers. The three chambers are a head chamber 140 disposed above, a chest chamber 160 disposed in the center, and a pelvis chamber 180 disposed below.

The head chamber 140 protects the head of the occupant, the chest chamber 160 protects the chest of the occupant, and the pelvis chamber 180 protects the pelvis of the occupant. In particular, the thorax chamber 160 needs to have a curved shape to wrap the front of the thorax of the passenger, i.e., when deployed, even if the thorax chamber 160 is deployed forward, it needs to be curved during deployment to have a curved configuration toward the passenger as shown in fig. 7.

To this end, the present invention bends the chest chamber 160 toward the chest of the passenger by a plurality of tethers, and provides a force that causes the head chamber 140 and the pelvis chamber 180 to laterally support and restrain the head and pelvis of the passenger using the tension of the tethers.

Multiple tethers are shown in fig. 1, but the actual length of each tether should be shorter than that shown in fig. 1. When a shorter tether is used, the various chambers deform as shown in fig. 7, and the tether is shown longer in fig. 1-6 for the purpose of aiding understanding.

Specifically, in the embodiment of fig. 1, the 1 st tether T1 is disposed outside the passenger side of the cushion, and therefore the 1 st tether T1 is not in direct contact with the passenger. Since the 1 st tether T1 has one end connected to the seat back frame (not shown) side on the seat back side and the other end connected to the chest chamber 160, the 1 st tether T1 functions to pull the chest chamber 160 toward the passenger side when the cushion is unfolded.

Similarly, the 2 nd tether T2 is disposed outside the cushion, and the 2 nd tether T2 has one end connected to the other end of the 1 st tether T1 and the other end connected to the lower portion of the chest chamber 160 to support the chest chamber 160.

The 3 rd tether T3 is disposed on the inner side of the passenger side of the cushion, and one end of the 3 rd tether T3 is connected to the other end of the 2 nd tether T2, and the other end is fixed to the inflator 120 side. Thus, the 3 rd tether T3 directly contacts and supports the pelvis of the occupant.

As shown in fig. 7, by such a connection relationship of the respective tethers, the head chamber 140, the thorax chamber 160, and the pelvis chamber 180 take a form of being gathered to each other without being opened, and particularly, the thorax chamber 160 has a form of being curved toward the thorax of the passenger, and by such a shape and a supporting force of the chambers, the passenger is restrained without the upper body being ejected forward in a state of being seated in the seat, and the impact is absorbed by the cushion.

On the other hand, the 1 st tether T1 to the 3 rd tether T3 have a rope shape integrally connected, the other end of the 1 st tether T1 passes through the first hole H1 at the upper portion of the chest chamber 160, and the other end of the 2 nd tether T2 passes through the second hole H2 at the lower portion of the chest chamber 160. One end of the 1 st tether T1 is fixed to the seat back frame (not shown).

In addition, as shown in fig. 2, a head dead zone D2 may be formed in the head chamber 140 such that the other end of the 1 st tether T1 is fixed to the head dead zone D2, one end of the 1 st-1 tether T1-1 is fixed to the head dead zone D2 and the other end is connected to the upper portion of the chest chamber 160, and one end of the 2 nd tether T2 is connected to the other end of the 1 st-1 tether T1-1. In this case, the 1 st-1 tether T1-1 is disposed on the inner side of the passenger side of the cushion, the 2 nd tether T2 is disposed on the outer side of the cushion, and the 3 rd tether T3 is disposed on the inner side of the cushion.

By this connection relationship of the tethers, the tethers share tension with each other and affect each other, and therefore, when a passenger applies a load to one side, the tether of the other side is pulled, so that the passenger can be restrained effectively.

In particular, a thorax dead zone D1 having a groove shape depressed toward the center is formed at the upper portion of the thorax chamber 160, and therefore, at the time of deployment of the airbag, the thorax chamber 160 is pulled by the 1 st tether T1, and the front portion of the thorax chamber 160 can be bent toward the thorax side of the passenger with reference to the thorax dead zone D1, by which shape the thorax chamber 160 can effectively restrain the passenger.

As shown in fig. 3, a third hole H3 is formed at the rear of the head chamber 140, the 1 st tether T1 is bent after passing through the third hole H3, and the other end of the 1 st tether T1 is fixed to a head dead region D2.

As shown in fig. 4, a third hole H3 is formed at the rear of the head chamber 140, and after the 1 st tether T1 passes through the third hole H3, the other end thereof is fixed to the upper portion of the head chamber 140, one end of the 1 st-1 st tether T1-1 is fixed to the upper portion of the head chamber 140, the other end thereof is connected to the upper portion of the thorax chamber 160, and one end of the 2 nd tether T2 is connected to the other end of the 1 st-1 st tether T1-1.

In this case, when the 1 st-1 tether T1-1, the 2 nd tether T2, and the 3 rd tether T3 are connected as one tether, a tether pulling action is generated with reference to the upper fixing point P3 of the head chamber 140, and the head chamber 140 can be prevented from shaking and the chest chamber 160 can be reliably pulled toward the passenger side, and the initial speed of pulling the chest chamber 160 can be increased.

In addition, as shown in FIG. 5, a protrusion 142 protruding upward is formed at an upper portion of the head chamber 140, and the other end of the 1 st tether T1 may be fixed to a front portion of the protrusion 142 and one end of the 1 st-1 tether T1-1 may be fixed to a front portion of the protrusion 142. That is, the other end of tether T1 No. 1 is fixed to the upper portion of head chamber 140, and one end of tether T1-1 No. 1 is fixed to the upper portion of head chamber 140 and the other end is connected to the upper portion of thoracic chamber 160, and one end of tether T2 No. 2 is connected to the other end of tether T1-1 No. 1.

In addition, as shown in fig. 6, the 2 nd tether T2 may have one end connected to the other end of the 1 st-1 st tether T1-1 and the other end connected to the lower portion of the pelvic chamber 180, and the 3 rd tether T3 may have one end connected to the lower portion of the pelvic chamber 180 and the other end fixed to the inflator 120 side. In this case, the 1 st-1, 2 nd, and 3 rd tethers T1-1, T2, and T3 may have a rope shape integrally connected, which may pass through the first hole H1 of the upper portion of the thorax chamber 160, the second hole H2 of the lower portion of the thorax chamber 160, and the 4 th hole H4 of the lower portion of the pelvis chamber 180, in order.

Thus, the 1 st tether T1 is disposed outside the mattress, the 1 st-1 tether T1-1 is disposed inside the mattress, the 2 nd tether T2 is disposed outside the mattress, and the 3 rd tether T3 is disposed inside the mattress.

Further, in the 1 st tether T1 to the 3 rd tether T3, all or a part of the section thereof may be formed of a material having elasticity. All the tether belts may be formed of a material having elasticity such as rubber or silicone, but only a part of the section of the tether belt may be made of a material having elasticity. In the case of using such a material, since the tether belt is contracted and further closely attached to the passenger after deployment, the passenger can be protected in a manner of wrapping the passenger.

With the above structure, the airbag protects the passenger in such a manner as to further wrap the chest and the head of the passenger, so that it is possible to reduce the amount of movement of the head and the chest of the passenger and to effectively restrain the passenger. According to the vehicle seat airbag of the present invention, it is possible to provide a new concept of a seat airbag that is provided in a vehicle seat and that is deployed at the side of an occupant while protecting the head, chest, and pelvis of the occupant, unlike a conventional seat-side airbag.

In addition, as shown in fig. 7, the seat airbag for a vehicle according to the present invention may be formed in a shape in which the lower end of the head chamber 140 is connected to the upper end of the pelvis chamber 180. The chest chamber 160, located centrally between the head chamber 140 and the pelvic chamber 180, may be formed to curve toward the occupant. The connection of the head chamber 140 and the pelvic chamber 180 may be made by suturing (threading) during the manufacturing process. Since the head chamber 140 is connected to the pelvis chamber 180, the body of the passenger can be effectively restrained even if a collision occurs, thereby minimizing the amount of movement of the passenger. The shape of the chamber shown in fig. 7 can be applied to all embodiments and is therefore not limited to the shape shown in the drawings.

Although a specific embodiment of the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that various modifications and changes may be made to the present invention without departing from the scope of the technical idea of the present invention provided in the claims.