JP2007197008A - Side airbag apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side airbag apparatus capable of effectively protecting an occupant even when a body side part is largely deformed toward inside of a cabin at the time of collision. <P>SOLUTION: In the state where an airbag 16 is deployed and expanded, an upper compartment 18 corresponding to a shoulder Ps of an occupant P and an intermediate compartment 20 corresponding to a thorax Pc are formed. The airbag 16 is provided with a seam 17 for regulating swelling of the intermediate compartment 20. Due to the seam 17, the thickness of the upper compartment 18 becomes larger than that of the intermediate compartment 20, at the time of development and expansion of the airbag 16. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a side airbag device including an airbag that is deployed between a body side portion of a vehicle and a seat disposed in a vehicle interior. In particular, the present invention relates to an airbag apparatus in which an airbag is deployed and inflated greatly on the side of an occupant.

As a conventional side airbag device of this type, for example, those having configurations as disclosed in Patent Literature 1, Patent Literature 2, and Patent Literature 3 have been proposed.
In patent document 1, as shown in FIG. 16, the side airbag apparatus 42 is equipped in the backrest part 41a of the seat 41 in a vehicle interior. In the airbag 43 of the side airbag device 42, the first chamber 45 that can be inflated on the side of the thorax portion Pc of the occupant P seated on the seat 41 via the divided seam 44, and the side of the waist portion Ph. An inflatable second chamber 46 is defined.

  A prechamber 48 is defined on the circumferential side of the gas generator 47 for deploying and inflating the airbag 43. Between the prechamber 48 and the first and second chambers 45 and 46, first and second inflow openings 49 and 50 each having a plurality of small holes are provided, and the opening of the first inflow opening 49 is provided. The area is formed so as to be smaller than the opening area of the second inflow opening 50.

  Then, when an impact of a predetermined value or more is applied to the body side portion due to a side collision of the vehicle, the gas generated from the gas generator 47 is supplied to the pre-chamber 48, and then the first and second having different opening areas are used. 2 are introduced into the first and second chambers 45 and 46 through the inflow openings 49 and 50 with different inflow amounts. Due to the difference in the amount of gas inflow, both chambers 45 and 46 are expanded and expanded so that the internal pressure of the first chamber 45 is lower than the internal pressure of the second chamber 46.

  Moreover, in patent document 2, as shown in FIG. 17, the 1st expansion | deployment area | region which can expand | swell on the rear side rather than the arm part Pa of the passenger | crew P via the partition 51 in the airbag 43 of the side airbag apparatus 42. 52 and a second development region 53 that is in contact with the arm portion Pa and can be expanded are partitioned. Then, at the time of a side collision of the vehicle, the first deployment region 52 is immediately expanded from the lower side to the upper side by the gas generated from the gas generator 47, and then the second deployment region 53 is delayed and expanded from the lower side to the upper side. It has come to be.

Further, Patent Document 3 proposes a side airbag device including an airbag that is greatly expanded and inflated so as to integrally cover an occupant's head to waist.
JP 2000-177527 A JP 2000-280853 A US Pat. No. 5,120,079

In Patent Document 1, the first chamber 45 corresponding to the thoracic part Pc of the occupant P is deployed and inflated at a lower internal pressure than the second chamber corresponding to the waist part Ph as described above. For this reason, the rib cage portion Pc, which is relatively weak against impact, is softer than the waist portion Ph. Therefore, the side airbag device of Patent Document 1 is configured so that the impact caused by the side collision does not act so much on the rib cage portion Pc, but the vehicle body side portion is greatly deformed and entered the indoor side. However, since the internal pressure of the first chamber 45 corresponding to the rib cage portion Pc is low, anxiety remains in protecting the rib cage portion Pc.

  In Patent Document 2, as described above, the inside of the airbag 43 is divided into the first and second deployment areas 52 and 53 in the vertical direction, but the deployment areas 52 and 53 are substantially the same. Is expanded and inflated with the internal pressure and form. For this reason, the airbag 43 is in an inflated and inflated state and comes into contact with the occupant P from the shoulder Ps to the waist Ph substantially uniformly, and as in the case of Patent Document 1, the anxiety remains in protecting the rib cage Pc. .

  Furthermore, in Patent Document 3, the airbag is simply expanded and inflated in a wide area to expand the protection area, and the airbag deployment form is changed according to the body part of the occupant. The point is not disclosed. For this reason, it is impossible to expect the effect of effectively protecting the occupant in consideration of the characteristics of the human body.

  The present invention has been made based on such a point of interest existing in the prior art. An object of the present invention is to provide a side airbag device that can effectively protect an occupant even when the body side portion greatly deforms and enters the indoor side in a side collision.

  In order to achieve the above object, the invention according to claim 1 is directed to a side airbag device including an airbag that is deployed between a body side portion of a vehicle and a seat disposed in a vehicle compartment. The bag is provided with a deployment portion corresponding to the shoulder portion of the occupant seated on the seat in the inflated state and a deployment portion corresponding to the thoracic portion of the occupant, and corresponds to the shoulder portion of the occupant when the airbag is deployed and inflated. The thickness of the expanding portion to be increased is larger than the thickness of the expanding portion corresponding to the thoracic portion of the occupant.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, when the airbag is inflated and inflated, expansion of the inflatable portion corresponding to the thoracic portion of the occupant is restricted. Is.

  According to a third aspect of the present invention, in the invention of the second aspect, the airbag is formed of a pair of base fabrics, and corresponds to the thoracic portion of the occupant by joining the pair of base fabrics to each other. The bulging of the development part is restricted.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, by forming a seam in which the pair of base fabrics are sewn and joined together, the expanded portion corresponding to the thoracic portion of the occupant can be bulged. It is characterized by being regulated.

  According to a fifth aspect of the present invention, in the invention of the fourth aspect, a compartment as a deployment portion corresponding to a shoulder portion of the occupant and a thoracic portion of the occupant are formed in the airbag by the seam. A compartment as a corresponding developing part is formed.

The invention according to claim 6 is the invention according to claim 4, wherein the seam extends in the vertical direction.
The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the airbag is provided in a seat of a vehicle.

According to an eighth aspect of the present invention, there is provided an airbag that is deployed between a body side portion of a vehicle and a seat disposed in a vehicle compartment, a gas generation source that deploys and inflates the airbag, and a body side portion. In the side airbag device comprising: an impact sensor connected to the gas generation source to detect the applied impact and drive the gas generation source to deploy and inflate the airbag. A deployment portion corresponding to the shoulder portion of the occupant seated on the seat in the expanded state and a deployment portion corresponding to the thoracic portion of the occupant, and the deployment portion corresponding to the shoulder portion of the occupant when the airbag is deployed and inflated Is thicker than the thickness of the deployed portion corresponding to the thoracic portion of the occupant.

  The invention according to claim 9 is the invention according to claim 8, wherein the airbag is formed of a pair of base fabrics, and the pair of base fabrics are joined to each other, whereby the airbag is deployed and inflated. In this case, the expansion of the deployment portion corresponding to the thoracic portion of the occupant is restricted.

  According to a tenth aspect of the present invention, in the ninth aspect of the present invention, when the airbag is deployed and inflated, a seam is formed by sewing and joining the pair of base fabrics to each other. The bulging of the development part corresponding to the thorax is restricted.

  Therefore, according to the present invention, when the airbag is deployed and inflated, the thickness of the deployed portion corresponding to the shoulder portion of the occupant becomes larger than the thickness of the deployed portion corresponding to the rib cage portion. As a result, even when the body side part greatly deforms and enters the indoor side, prior to that, the occupant can be moved to the indoor side by pressing the shoulder part of the occupant having resistance to external impact. it can. Therefore, an impact can be absorbed effectively while protecting the entire body of the occupant including the rib cage.

  Further, in the present invention, when the pair of base fabrics forming the airbag are joined to each other to restrict the expansion of the deployment portion corresponding to the thoracic portion of the occupant, the expansion is controlled. Therefore, it is possible to prevent the number of parts from increasing, and as a result, the structure is simplified and the airbag can be manufactured at a low cost.

  The present invention exhibits an excellent effect of being able to effectively protect an occupant even when the body side portion greatly deforms and enters the indoor side during a side collision.

(First embodiment)
Below, 1st Embodiment of this invention is described based on FIGS. 1-4.
1 to 3 show a left front seat 11 disposed in a vehicle interior, and the front seat 11 includes a seat portion 11a and a backrest portion 11b. A side airbag device 13 is embedded and disposed inside the case 14 in the left side of the backrest portion 11b of the front seat 11 so as to correspond to the door 12 constituting a part of the body side portion. In the drawing, only the left front seat 11 is shown, but a similar airbag device is also provided inside the right front seat.

  The side airbag device 13 includes an inflator 15 as a gas generation source fixed in the case 14 and a bag-like airbag 16 attached so as to cover the inflator 15. A gas generating agent (not shown) for inflating and inflating the airbag 16 is accommodated in the case of the inflator 15, and a gas outlet 15 a as a gas injection part for injecting gas is provided below the case of the inflator 15. Is formed.

A sensor (not shown) for detecting an impact on the body side portion is electrically connected to the inflator 15. When an impact of a predetermined value or more is applied to the body side part due to a side collision of another vehicle with respect to the body side part, the inflator 15 is driven via a control circuit (not shown) based on a detection signal from the sensor. Current is output. By this ignition based on the drive current, a gas is generated from the gas generating agent in the inflator 15, and the gas is jetted and supplied into the airbag 16 from the gas jet port 15a.

  As shown in FIGS. 2 and 3, the airbag 16 is formed by sewing a pair of base fabrics 16a and 16b made of woven fabric or the like so as to form a bag shape as a whole at their peripheral edges. Is housed in the case 14 in a folded state.

  When the inflator 15 is activated and gas is generated, the airbag 16 is deployed and inflated between the door 12 and the front seat 11 and seated on the front seat 11 as shown in FIGS. The body of the occupant P is covered from the shoulder Ps to the waist Ph.

  A substantially lateral U-shaped seam 17 in which both base fabrics 16a and 16b are joined to each other is formed at a substantially central position in the vertical direction of the airbag 16, and the seam 17 regulates the regulation of the first embodiment. Means and guidance means are configured. Inside the airbag 16, an upper compartment 18 as an upper deploying portion and a lower compartment 19 as a lower deploying portion are formed by a seam 17. Further, an intermediate compartment 20 as an intermediate portion is formed between the upper and lower compartments 18 and 19 so as to open toward the rear of the vehicle. On the side opposite to the inflator 15, a gas passage 21 is formed between the peripheral portion of the airbag 16 and the seam 17.

  As shown by the arrows in FIG. 1, the gas ejected from the gas ejection port 15 a of the inflator 15 is introduced into the lower compartment 19, and the gas passage extends from the lower compartment 19 along the outer periphery of the seam 17. It is introduced into the upper compartment 18 through 21. Thereafter, the gas in the upper compartment 18 is introduced into the intermediate compartment 20 so as to bypass the upper edge of the seam 17. Thus, as is apparent from FIG. 4, the lower compartment 19 is inflated and arranged corresponding to the waist portion Ph of the occupant P, and at the same time, the upper compartment 18 is inflated to correspond to the shoulder portion Ps of the occupant P. Be placed. After that, the intermediate compartment 20 is expanded and disposed corresponding to the thoracic part Pc of the occupant P. In addition, a vent hole (not shown) is formed in a part of the airbag 16 to discharge internal gas after inflation.

  Moreover, in this airbag 16, the seam 17 is formed in the side shape substantially horizontal U shape in the state which tensioned the intermediate part of the up-down direction of the base fabrics 16a and 16b. Thereby, when the airbag 16 is deployed and inflated, the expansion of the intermediate compartment 20 is restricted by the seam 17, and as shown in FIG. 2, the upper compartment 18 corresponding to the shoulder Ps and the waist Ph of the occupant P and The thickness of the lower compartment 19 is configured to be larger than the thickness of the intermediate compartment 20 corresponding to the rib cage portion Pc. Here, various conditions such as the position of the seam 17 are set so that each of the compartments 18 to 20 has a thickness within the following range. That is, the conditions are set so that the upper and lower compartments 18 and 19 have a thickness of 150 to 200 mm, and the intermediate compartment 20 has a thickness of 50 to 130 mm. In this case, when the thickness of the upper and lower compartments 18 and 19 is equal, the thickness of the intermediate compartment 20 is desirably ¼ to ¼ of the thickness. When the thicknesses 18 and 19 are different, it is desirable that the lower compartments 18 and 19 are 1/4 to 3/4. The values of the thicknesses of these compartments 18 to 20 are values set under so-called static deployment conditions under the condition that no external load such as a collision is applied to the airbag 16.

Next, operation | movement is demonstrated about the side airbag apparatus 13 comprised as mentioned above.
Now, when an impact of a predetermined value or more is applied to the body side part due to a side collision by another vehicle with respect to the body side part of the vehicle, a sensor (not shown) detects this, and gas is generated from the inflator 15 based on the detection. The Then, as indicated by an arrow in FIG. 1, the gas is ejected and supplied from the gas outlet 15 a of the inflator 15 to the lower compartment 19 of the airbag 16 and introduced into the upper compartment 18 through the gas passage 21. Then, it is introduced into the intermediate compartment 20. As a result, as shown in FIG. 4, the upper compartment 18 corresponding to the shoulder portion Ps of the occupant P and the lower compartment 19 corresponding to the waist portion Ph are inflated almost simultaneously, and thereafter the intermediate compartment corresponding to the rib cage portion Pc. Chamber 20 is expanded.

  In this case, as shown in FIG. 2, the thickness of the upper compartment 18 and the lower compartment 19 is larger than the thickness of the intermediate compartment 20. For this reason, a space S is formed between the intermediate compartment 20 and the thoracic part Pc of the occupant P, and in this state, the shoulder Ps and the waist Ph of the occupant P are formed by the upper compartment 18 and the lower compartment 19. It is pushed inward. Thereby, the passenger | crew P is moved indoors and the impact accompanying a side collision is eased, protecting the rib cage part Pc. Therefore, even when the body side part greatly deforms and enters the indoor side, the occupant P is separated from the body side part prior to the deformation entry and can protect the occupant P, and the impact on the thorax part Pc is suppressed. Pc can be effectively protected.

Therefore, according to this embodiment, the following effects can be obtained.
(1) In the side airbag device 13, the airbag 16 is deployed and inflated, and the upper compartment 18 corresponding to the shoulder Ps of the occupant P, the lower compartment 19 corresponding to the waist Ph, and the thorax Pc. And an intermediate compartment 20 corresponding to. When the airbag 16 is deployed and inflated, the expansion of the intermediate compartment 20 is regulated so that the thickness of the upper compartment 18 and the lower compartment 19 is larger than the thickness of the intermediate compartment 20. ing.

  For this reason, even when the body side portion greatly deforms and enters the indoor side at the time of a side collision of the vehicle, prior to that, the shoulder portion Ps and the waist portion Ph of the occupant P having resistance to external impacts. The passenger P can be moved indoors by pushing. Therefore, the passenger | crew P can be effectively protected from the impact by a side collision, fully protecting the rib cage part Pc.

  (2) In the side airbag device 13, the gas supplied from the inflator 15 is guided to the upper compartment 18 and the lower compartment 19 almost simultaneously when the airbag 16 is deployed and inflated. For this reason, the upper compartment 18 and the lower compartment 19 are expanded and inflated almost simultaneously, and the shoulder Ps and the waist Ph of the occupant P can be pushed almost simultaneously, so that the occupant P can be quickly moved to the indoor side. Therefore, the protection effect of passenger | crew P can be improved further.

  (3) In the side airbag device 13, the bulge restricting configuration of the intermediate compartment 20 and the gas guiding configuration are formed by a seam 17 for sewing and joining between the base fabrics 16 a and 16 b of the airbag 16. For this reason, it is not necessary to provide a dedicated part as a restriction | limiting structure and a guidance structure, and it can prevent that a number of parts increases. Therefore, the structure is simplified and the airbag 16 can be manufactured at low cost.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with a focus on differences from the first embodiment.
In the second embodiment, as shown in FIGS. 5 and 6, a wide seam 17A is sewn between the base fabrics 16a and 16b between the base fabrics 16a and 16b at substantially the upper and lower intermediate portions of the airbag 16. The upper compartment 18 and the lower compartment 19 are defined in the airbag 16 by the seam 17A. Further, the wide seam 17A constitutes a restricting means for restricting the expansion of the intermediate portion of the airbag 16 and a gas guiding means. As shown by arrows in FIG. 5, the gas ejected from the gas ejection port 15 a of the inflator 15 is introduced into the upper compartment 18 and the lower compartment 19 almost simultaneously.

As a result, when the airbag 16 is deployed and inflated, the upper compartment 18 and the lower compartment 19 are arranged corresponding to the shoulder Ps and the waist Ph of the occupant P, and the seam 17A in the middle between the compartments 18 and 19 is provided. It is arranged corresponding to the rib cage Pc. In this case, as shown in FIG. 6, since the thickness of both compartments 18 and 19 is larger than the thickness of the seam 17A, a space S is formed between the seam 17A and the thoracic part Pc of the occupant P. The Therefore, as in the case of the first embodiment, the shoulder Ps and the waist Ph of the occupant P are pushed almost at the same time, and the occupant P is moved to the indoor side while protecting the rib cage Pc. The impact at the time of a collision can be reduced.

Therefore, according to the second embodiment, in addition to the effects described in (1) to (3) in the first embodiment, the following effects can be obtained.
(4) In the side airbag device 13, the intermediate portion bulge restricting configuration and the gas guiding configuration are arranged at the intermediate positions between the upper compartment 18 and the lower compartment 19 of the airbag 16. Only a wide seam 17A for sewing and joining 16b is provided.

  Accordingly, the airbag 16 can be easily manufactured, and the manufacturing cost can be reduced. Further, when the airbag 16 is deployed and inflated, the wide seam 17A is in an intermediate portion between the upper compartment 18 and the lower compartment 19 and is thinner than the compartments 18 and 19, and the chest of the occupant P is thin. This corresponds to the part Pc. For this reason, the protection effect of the rib cage portion Pc can be further enhanced when the airbag 16 is deployed and inflated.

(Third embodiment)
Next, a third embodiment of the present invention will be described with a focus on differences from the first embodiment.
In the third embodiment, as shown in FIG. 7, the two seams 17 constituting the restricting means are provided on the airbag 16 by sewing and joining the base fabrics 16a and 16b with a predetermined distance therebetween. The two seams 17 define an upper compartment 18, a lower compartment 19, and an intermediate compartment 20 in the airbag 16. The intermediate compartment 20 is formed between the two seams 17. In the third embodiment, the two seams 17 are formed in a state where the base fabrics 16a and 16b between them are tensioned in the vertical direction. Thus, when the airbag 16 is deployed and inflated, the thickness of the intermediate compartment 20 is reduced, and the thickness of the upper and lower compartments 18 and 19 is configured to be greater than the thickness of the intermediate compartment 20. A cover 24 is disposed on the peripheral side of the inflator 15, and an introduction chamber 25 is formed by the cover 24 as guiding means for introducing the gas blown and supplied from the gas outlet 15 a of the inflator 15.

  Guide holes 26A, 26B, and 26C as guide means are formed in the cover 24 so as to correspond to the respective compartments 18, 19, and 20, and the compartments are introduced from the introduction chamber 25 through these guide holes 26A to 26C. A gas is introduced into the 18, 19, and 20 units. The total opening area of each of the guide holes 26A and 26B corresponding to the upper compartment 18 and the lower compartment 19 is formed to be larger than the total opening area of the guide hole 26C corresponding to the intermediate compartment 20. Yes. Accordingly, the upper and lower compartments 18 and 19 are expanded and expanded simultaneously, and the thickness of the intermediate compartment 20 is expanded and expanded thinner than the thickness of the upper compartment 18 and the lower compartment 19.

Therefore, according to the third embodiment, the same effects as those described in (1) to (3) in the first embodiment can be obtained.
(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with a focus on differences from the first embodiment.

In the fourth embodiment, as shown in FIG. 8, the seam 17 constituting the restricting means of the airbag 16 is formed in a substantially G shape on the side surface. A chamber 18, a lower compartment 19 and an intermediate compartment 20 are defined. The intermediate compartment 20 constituted by the seam 17 is regulated so as to be thinner than the upper compartment 18 and the lower compartment 19 in the expanded and deployed state. The inflator 15 is formed with gas jets 15a at two locations, upper and lower, and gas is jetted simultaneously from these gas jets 15a. In this fourth embodiment, the gas guiding means is constituted by the two arrangements of the seam 17 and the gas outlet 15a, whereby the upper compartment 18 and the lower compartment 19 expand almost simultaneously. After this, the intermediate compartment 20 is expanded.

Therefore, according to the fourth embodiment, in addition to the effects described in (1) to (3) in the first embodiment, the following effects can be obtained.
(5) In the side airbag device 13, the gas guiding structure includes two upper and lower gas jets 15 a provided in the inflator 15 corresponding to the upper compartment 18 and the lower compartment 19. For this reason, the time difference of expansion | deployment expansion | deployment of the upper compartment 18 and the lower compartment 19 can be made small.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described with a focus on differences from the first embodiment.
In the fifth embodiment, as shown in FIG. 9, the opening 20 a of the intermediate compartment 20 defined by the seam 17 constituting the restricting means is formed so as to face the vehicle front side opposite to the inflator 15. Inflow guide portions 20b are formed at the upper and lower peripheral edges of the opening 20a. Further, a vent hole 22 that opens toward the outside is formed in one of the base cloths 16a or 16b in the middle compartment 20 portion. Due to the seam 17, the upper compartment 18 and the lower compartment 19 are expanded and deployed thicker than the intermediate compartment 20.

Therefore, in the fifth embodiment, the following effects are exhibited in addition to the effects in the respective embodiments.
(6) In the side airbag device 13, the gas from the inflator 15 flows through the upper and lower compartments 18 and 19 and then flows into the intermediate compartment 20. Therefore, after the upper and lower compartments 18 and 19 are expanded and inflated almost simultaneously, the intermediate compartment 20 is inflated and deployed with a slight delay, and the internal pressure of the upper and lower compartments 18 and 19 is set higher than the internal pressure of the intermediate compartment 20. High pressure can be achieved. Therefore, it is possible to effectively protect the rib cage portion Pc.

  (7) In the side airbag device 13, the inflow guide portion 20 b of the intermediate compartment 20 facilitates the inflow of gas into the intermediate compartment 20 and prevents the expansion and expansion of the intermediate compartment 20 from being delayed too much. The expansion and expansion can be performed at an accurate timing.

  (8) In the side airbag device 13, the gas in the intermediate compartment 20 is suitably discharged from the vent hole 22, and the internal pressure of the intermediate compartment 20 can be prevented from becoming higher than necessary. It is effective for protection.

(Sixth embodiment)
Next, a sixth embodiment of the present invention will be described with a focus on differences from the first embodiment.
In the sixth embodiment, as shown in FIGS. 10 and 11, the airbag 16 is formed in a substantially one-room state without partitioning the interior. The airbag 16 is in an expanded and inflated state, and includes an upper deployment portion 27 corresponding to the shoulder portion Ps of the occupant P, a lower deployment portion 28 corresponding to the waist portion Ph, and an intermediate portion corresponding to the thorax portion Pc. An unfolding portion 29 is provided.

A constricted portion 30 is formed on the side edge in the thickness direction of the intermediate deployment portion 29 of the airbag 16 so as to correspond to the thoracic portion Pc of the occupant P, and the constricted portion 30 causes the intermediate deployment portion 29 to bulge out. A restricting means for restricting is configured. Further, as shown in FIG. 10, the width of the upper deployment portion 27 of the airbag 16 is formed to be wider than the widths of the lower deployment portion 28 and the intermediate deployment portion 29. The constricted portion 30 can be realized, for example, by using a weft having a poor extensibility as a portion of the weft corresponding to the intermediate development portion 29 in the base fabric 16b on the occupant P side. Therefore, in this case, the weft having poor extensibility constitutes the regulating means.

  Accordingly, when the airbag 16 is deployed and inflated, as shown in FIG. 11, the expansion of the intermediate deployment portion 29 is restricted by the constricted portion 30, and the thickness of the upper deployment portion 27 and the lower deployment portion 28 is set to the intermediate deployment portion. It becomes larger than the thickness of 29. At the same time, as shown in FIG. 10, the upper development part 27 becomes wider than the lower development part 28 and the intermediate development part 29. Therefore, almost in the same manner as in the first embodiment, the shoulder Ps and the waist Ph of the occupant P are pushed, the occupant P is moved to the indoor side, and the side collision is performed while protecting the rib cage Pc. The shock of time is eased.

Therefore, according to the sixth embodiment, in addition to the effect described in (1) in the first embodiment, the following effect can be obtained.
(9) In the side airbag device 13, it is only necessary to form the constricted portion 30 at the side edge of the intermediate deployment portion 29 of the airbag 16. For this reason, it is not necessary to provide a dedicated part as the bulging restricting configuration of the intermediate deployment part 29, and an increase in the number of parts can be prevented. Therefore, the structure is simplified and the airbag 16 can be manufactured at low cost.

  (10) In the side airbag device 13, the upper deployment portion 27 of the airbag 16 is formed to be wider than the lower deployment portion 28 and the intermediate deployment portion 29. For this reason, when the airbag 16 is deployed and inflated, the wide upper deployment portion 27 effectively abuts against the shoulder portion Ps of the occupant P, and the occupant P can be reliably moved indoors.

(Seventh embodiment)
Next, a seventh embodiment of the present invention will be described with a focus on differences from the first embodiment.
In the seventh embodiment, as shown in FIGS. 12 and 13, the airbag 16 is provided with an upper deployment portion 27, a lower deployment portion 28 and an intermediate deployment portion 29 similar to those of the sixth embodiment. . A regulation cloth 31 made of a flame retardant nonwoven fabric or the like is sewn and joined to the outer periphery or inner circumference of the intermediate deployment portion 29 of the airbag 16, and the regulation fabric 31 regulates the expansion of the intermediate deployment portion 29. Means are configured.

  As a result, when the airbag 16 is deployed and inflated, as shown in FIG. 13, the expansion of the intermediate deployment portion 29 is regulated by the regulating cloth 31, and the thickness of the upper deployment portion 27 and the lower deployment portion 28 is set to the intermediate deployment portion. It becomes larger than the thickness of 29. Therefore, as in the case of the sixth embodiment, the occupant P is moved indoors by pressing the shoulder Ps and the waist Ph, and the impact at the side collision is reduced while protecting the rib cage Pc.

Therefore, also in the seventh embodiment, substantially the same effect as that in the sixth embodiment can be obtained.
(Example of change)
In addition, this embodiment can also be changed and embodied as follows.

In each of the above embodiments, the airbags 16, 16A, and 16B are formed by, for example, a single woven cloth that is woven into a bag without sewing the pair of base fabrics 16a and 16b.
In each of the above embodiments, the airbag 16 is formed using other materials such as a nonwoven fabric and a synthetic resin sheet in addition to the woven fabric.

In the first and third to fifth embodiments, as indicated by a two-dot chain line in FIG. 4, the internal pressure of the intermediate compartment 20 during gas generation is lower than the internal pressure of the upper and lower compartments 18 and 19. To be configured. For this purpose, for example, means such as reducing the cross-sectional area of the gas passage leading to the intermediate compartment 20 may be taken. And if it does in this way, the external pressure with respect to the rib part Pc of the passenger | crew P can be made low, and it is effective in protection of the passenger | crew P. FIG.

In the first and fourth embodiments, an inflow guide portion similar to that of the fifth embodiment is provided at the opening edge of the intermediate compartment 20.
In the first to fourth, sixth, and seventh embodiments, a vent hole similar to that of the fifth embodiment is provided in a portion corresponding to the intermediate compartment 20 or the intermediate deployment portion 29.

  In the airbag 16 of the sixth and seventh embodiments, as a restricting means, as shown in FIGS. 14 and 15, a plurality of seams 17B extending in the vertical direction are sewn between the base fabrics 16a and 16b. .

The side sectional view showing the side airbag device of a 1st embodiment. The partial expanded sectional view in the 2-2 line of FIG. The partial expanded sectional view in the 3-3 line of FIG. The graph which shows the pressure change at the time of expansion | deployment expansion | swelling of each compartment of FIG. The side view which shows the side airbag apparatus of 2nd Embodiment. The fragmentary sectional view in the 6-6 line of FIG. The sectional side view which shows the side airbag apparatus of 3rd Embodiment. The sectional side view which shows the side airbag apparatus of 4th Embodiment. The sectional side view which shows the side airbag apparatus of 5th Embodiment. The sectional side view which shows the side airbag apparatus of 6th Embodiment. The fragmentary sectional view in the 11-11 line of FIG. The sectional side view which shows the side airbag apparatus of 7th Embodiment. The fragmentary sectional view in the 13-13 line | wire of FIG. The fragmentary sectional view which shows another structure of the seam of an airbag. The fragmentary sectional view which shows another structure of the seam of an airbag. The sectional side view which shows the conventional side airbag apparatus. The sectional side view which shows another structure of the conventional side airbag apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Front seat, 11b ... Backrest part, 12 ... Door which comprises the body side part of a vehicle, 13 ... Side airbag apparatus, 15 ... Inflator as a gas generation source, 16 ... Air bag, 16a, 16b ... Base fabric, 17, 17A, 17B ... Seam, 18 ... Upper compartment as a deployment portion corresponding to the shoulder of the occupant, 20 ... Intermediate compartment as a deployment portion corresponding to the thorax of the occupant, 27 ... Corresponding to the shoulder of the occupant An upper deploying portion as an unfolding portion, 29... An intermediate deploying portion as a deploying portion corresponding to the thoracic portion of the occupant, 30 ... a constricted portion, 31 ... a regulating cloth, P ... an occupant, Ps.

Claims (10)

In a side airbag device including an airbag that is deployed between a body side portion of a vehicle and a seat disposed in a vehicle interior,
The airbag is provided with a deployment portion corresponding to a shoulder portion of an occupant seated on a seat in a deployed and inflated state, and a deployment portion corresponding to a thoracic portion of the occupant,
The side airbag device according to claim 1, wherein when the airbag is deployed and inflated, a thickness of the deployment portion corresponding to the shoulder portion of the occupant is larger than a thickness of the deployment portion corresponding to the thoracic portion of the occupant.   The side airbag device according to claim 1, wherein when the airbag is deployed and inflated, inflation of the deployment portion corresponding to the thoracic portion of the occupant is restricted. The airbag is formed from a pair of base fabrics,
The side airbag device according to claim 2, wherein the pair of base fabrics are joined to each other, whereby the expansion of the deployment portion corresponding to the thoracic portion of the occupant is restricted.   The side airbag device according to claim 3, wherein a bulge of a deployment portion corresponding to the thoracic portion of the occupant is restricted by forming a seam in which the pair of base fabrics are sewn and joined together. .   A compartment as a deploying portion corresponding to a shoulder portion of the occupant and a compartment as a deploying portion corresponding to the thoracic portion of the occupant are formed in the airbag by the seam. The side airbag device according to claim 4.   The side airbag device according to claim 4, wherein the seam extends in a vertical direction.   The side airbag device according to any one of claims 1 to 6, wherein the airbag is provided in a vehicle seat. An airbag that is deployed between a body side portion of the vehicle and a seat disposed in the vehicle interior;
A gas generation source for deploying and inflating the airbag;
In a side airbag device comprising: an impact sensor connected to the gas generation source for detecting an impact applied to the body side portion and driving the gas generation source to deploy and inflate the airbag.
The airbag is provided with a deployment portion corresponding to a shoulder portion of an occupant seated on a seat in a deployed and inflated state, and a deployment portion corresponding to a thoracic portion of the occupant,
The side airbag device according to claim 1, wherein when the airbag is deployed and inflated, a thickness of the deployment portion corresponding to the shoulder portion of the occupant is larger than a thickness of the deployment portion corresponding to the thoracic portion of the occupant. The airbag is formed from a pair of base fabrics,
The pair of base fabrics are joined to each other, and when the airbag is deployed and inflated, the expansion of the deployment portion corresponding to the thoracic portion of the occupant is restricted. The side airbag device as described.   By forming a seam in which the pair of base fabrics are sewn and joined together, when the airbag is deployed and inflated, the expansion of the deployment portion corresponding to the thoracic portion of the occupant is restricted. The side airbag device according to claim 9.

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