Side airbag device

Abstract

The present invention relates to a side airbag device and a method for manufacturing the same. The side airbag device comprises an inflator part that discharges gas, a cushion part connected to the inflator part that deploys toward the side of a passenger by the gas discharged from the inflator part, and a tether member disposed to penetrate and surround the cushion part and to control the deployment shape of the cushion part when the cushion part is deployed. The tether member is characterized by inducing the upper region and the lower region of the cushion part to deform independently.

Description

Technology Field

[0001] The present invention relates to a side airbag device and a method for manufacturing the same, and more specifically, to a side airbag device and a method for manufacturing the same that safely protects passengers by minimizing injury. Background Technology

[0003] Generally, side airbags protect the passenger's side. In other words, in the event of a vehicle accident, the airbag cushion inflates with injected gas, and the inflated cushion protects the passenger moving sideways through its cushioning action.

[0004] Side airbags include near-side airbags, which deploy between the passenger and the door to protect the passenger during a side collision, and far-side airbags, which restrict the movement of the passenger moving inward due to the recoil from the side collision.

[0005] Far side airbags are equipped to maintain a certain position while inflated to prevent collisions between passengers, particularly head-to-head collisions, and to prevent collisions with interior components such as consoles and seats. Far side airbags primarily protect passengers by controlling the movement of the torso, and secondarily protect passengers by controlling the movement of the head.

[0006] However, conventional side airbags are designed so that tether tension acts only on the upper part of the airbag cushion, which leads to a problem where the passenger's torso area is not properly controlled. Insufficient support for the passenger's torso area results in neck injury due to excessive head movement. Therefore, there is a need to improve the design by enhancing support for the passenger's torso area to minimize head movement.

[0007] The background technology of the present invention is disclosed in Korean Patent Publication No. 10-1697924 (registered on January 13, 2017, title of invention: Side Airbag Device). The problem to be solved

[0009] The present invention has been devised to solve the aforementioned problems and aims to provide a side airbag device and a method for manufacturing the same, which effectively restrains the torso by increasing the support force of the passenger's torso in the cushion part, thereby reducing the passenger's head movement.

[0010] In addition, the present invention aims to provide a side airbag device that prevents neck injury to a passenger and safely protects the passenger during a vehicle collision, and a method for manufacturing the same. means of solving the problem

[0012] To achieve the above objective, the side airbag device according to the present invention comprises an inflator part that discharges gas, a cushion part connected to the inflator part and deployed toward the side of a passenger by the gas discharged from the inflator part, and a tether member disposed to penetrate and surround the cushion part and to control the deployment shape of the cushion part when the cushion part is deployed, wherein the tether member is characterized by inducing the upper region and the lower region of the cushion part to deform independently.

[0013] The cushion portion comprises a cushion body, a separating portion that separates a part of the cushion body vertically, a first deformation portion disposed at the lower part of the separating portion as a part of the cushion body to protect the torso portion of the passenger and deformed by the tether member, and a second deformation portion disposed at the upper part of the separating portion as another part of the cushion body to protect the head portion of the passenger and deformed by the tether member, wherein the tether member may be characterized by inducing the first deformation portion and the second deformation portion to deform independently of each other.

[0014] The cushion body may be characterized by including an inboard surface facing the passenger to be protected and an outboard surface opposite to the inboard surface, and the cushion portion may be characterized by including a through hole formed to penetrate the inboard surface and the outboard surface in the cushion body and through which the tether member passes.

[0015] The above-mentioned through-hole portion may be characterized by including a first through-hole penetrating the first deformation portion, a second through-hole penetrating the first deformation portion and formed spaced apart from the first through-hole in a direction toward the edge of the cushion body and formed adjacent to the separation portion, a third through-hole penetrating the second deformation portion, and a fourth through-hole penetrating the second deformation portion and formed spaced apart from the third through-hole in a direction toward the upper edge of the cushion body.

[0016] The cushion body may be characterized by comprising a first seat portion, a second seat portion that is sewn together with the first seat portion to form a chamber portion to which gas is supplied, and an inactive portion formed by joining a portion of the first seat portion and the second seat portion, wherein the first through hole and the third through hole are formed in the inactive portion.

[0017] The above tether member may be characterized by comprising: a first tether member having one end fixed to the lower part of the cushion body and the other end reaching the first through hole; a second tether member extending from the other end of the first tether member through the first through hole and reaching the second through hole; a third tether member extending from the end of the second tether member through the second through hole and reaching the third through hole; a fourth tether member extending from the end of the third tether member through the third through hole and reaching the fourth through hole; and a fifth tether member extending from the end of the fourth tether member through the fourth through hole and fixed to the cushion body.

[0018] The second through hole and the third through hole are formed facing each other with the separating part in between, and the third tether part may be characterized by being provided to pass through the separating part when extending from the second through hole to the third through hole.

[0019] The third tether portion may be positioned on the inboard surface, and the fourth tether portion may be positioned on the outboard surface.

[0020] The first tether portion may be positioned on the inboard surface, and the second tether portion may be positioned on the outboard surface.

[0021] The above-mentioned through-hole portion further includes a second-1 through-hole formed between the second through-hole and the separating portion, and the tether member comprises a first tether portion having one end fixed to the lower part of the cushion body and the other end reaching the first through-hole and disposed on the outboard surface; a second tether portion extending from the other end of the first tether portion through the first through-hole, reaching the second through-hole and disposed on the inboard surface; a second-1 tether portion extending from the end of the second tether portion through the second through-hole, reaching the second-1 through-hole and disposed on the outboard surface; a third tether portion extending from the end of the second-1 tether portion through the second-1 through-hole, reaching the third through-hole and disposed on the inboard surface; a fourth tether portion extending from the end of the third tether portion through the third through-hole, reaching the fourth through-hole and disposed on the outboard surface; and at the end of the fourth tether portion It may be characterized by including a fifth tether portion that extends through the fourth through hole and is fixed to the cushion body.

[0022] Meanwhile, a method for manufacturing a side airbag device according to the present invention comprises a first step of preparing a cushion body, a separating part for separating the cushion body into upper and lower sections, and a cushion part having a through hole that penetrates the inboard surface and the outboard surface of the cushion body; a second step of sewing together a first seat part forming the inboard surface of the cushion body and a second seat part forming the outboard surface; and a third step of installing a tether member so as to penetrate the through hole and surround the cushion part, wherein the third step is characterized by installing the tether member such that when the cushion part is deployed, the tether member induces the upper region and the lower region of the cushion part to deform independently.

[0023] The cushion portion comprises a first deformation portion disposed at the lower part of the separation portion and a second deformation portion disposed at the upper part of the separation portion, and in the third step, the tether member passes through a first through hole and a second through hole provided in the first deformation portion, then passes through a third through hole and a fourth through hole provided in the second deformation portion, and when extending from the second through hole to the third through hole, it passes through the separation portion. Effects of the invention

[0025] As such, according to an embodiment of the present invention, since the first deformation part is deformed, the passenger torso support force of the cushion part is increased, effectively restraining the torso, and thereby reducing the movement of the passenger's head. In addition, while the movement of the passenger's torso and head is minimized, the passenger head area can be additionally protected by the deformation of the second deformation part.

[0026] Therefore, according to an embodiment of the present invention, neck injury to a passenger can be prevented and the passenger can be safely protected during a vehicle collision. Brief explanation of the drawing

[0028] FIG. 1 illustrates a side airbag device according to a first embodiment of the present invention, and is an unfolded view of the cushion portion in an unfolded state as seen from the inboard side. Figure 2 is a drawing showing the BB cross-section of Figure 1. FIG. 3 is a drawing showing the state in which the second fixing part of the tether part in FIG. 1 is fixed to the cushion body. Figure 4 is an enlarged view of part A of Figure 1. FIG. 5 illustrates a side airbag device according to a second embodiment of the present invention, and is an unfolded view of the cushion portion in an unfolded state as seen from the inboard side. Figure 6 is a drawing showing the B'-B' cross-section of Figure 1. FIG. 7 is a drawing showing the state in which the second fixing part of the tether part in FIG. 1 is fixed to the cushion body. Figure 8 is an enlarged view of part A' of Figure 1, which is Figure 4. Specific details for implementing the invention

[0029] Hereinafter, embodiments of the present invention will be described in detail according to the attached drawings.

[0030] First, the embodiments described below are suitable for illustrating the technical features of the side airbag device and the method for manufacturing the same according to the present invention. However, the present invention is not limited to the embodiments described below, nor are the technical features of the present invention limited by the described embodiments; various modifications are possible within the technical scope of the present invention.

[0032] FIG. 1 illustrates a side airbag device according to a first embodiment of the present invention, which is an unfolded view of the cushion portion in an unfolded state as seen from the inboard surface; FIG. 2 illustrates a cross-section of BB of FIG. 1; FIG. 3 illustrates a state in which the second fixing portion of the tether member in FIG. 1 is fixed to the cushion body; FIG. 4 is an enlarged view of portion A of FIG. 1; FIG. 5 illustrates a side airbag device according to a second embodiment of the present invention, which is an unfolded view of the cushion portion in an unfolded state as seen from the inboard surface; FIG. 6 illustrates a cross-section of B'-B' of FIG. 1; FIG. 7 illustrates a state in which the second fixing portion of the tether member in FIG. 1 is fixed to the cushion body; and FIG. 8 is an enlarged view of portion A' of FIG. 4.

[0033] Referring to FIGS. 1 to 4, a side airbag device (100) according to the first embodiment of the present invention includes an inflator part (200), a cushion part (300), and a tether member (400).

[0034] The inflator unit (200) is configured to discharge gas. For example, the inflator unit (200) may be mounted on a seat frame. The seat frame is configured for a passenger to sit on, and the inflator unit (200) may be installed at a necessary location on the seat frame of each seat.

[0035] The cushion portion (300) is connected to the inflator portion (200) and expands toward the side of the passenger by the gas discharged from the inflator portion (200). Specifically, the cushion portion (300) is a member that protects the side of the passenger and can be provided between the seats. The cushion portion (300) is connected to the inflator portion (200) and is embedded in the seat cushion by being folded before gas discharge, and can be discharged to the outside by tearing the seat cushion as it expands after gas discharge.

[0036] The tether member (400) is positioned to penetrate and surround the cushion portion (300) and is configured to control the unfolded shape of the cushion portion (300) when the cushion portion (300) is unfolded. Here, the tether member (400) is configured to induce the upper region and the lower region of the cushion portion (300) to deform independently.

[0037] Specifically, the tether member (400) can be fixed to the cushion member (300) and the seat frame, and tension is generated when the cushion member (300) is deployed, thereby inducing bending in the cushion member (300). By doing so, the deployed shape of the cushion member (300) can be controlled, and the deployed shape of the cushion member (300) can vary depending on the connection path and length of the tether member (400). As the cushion member (300) is deformed by the tether member (400), the cushion member (300) can protect the passenger.

[0038] The tether member (400) can induce the upper and lower regions of the cushion portion (300) to deform independently. By inducing the lower region as well as the upper region to bend as the tether member (400) causes the thickness of the lower region of the cushion portion (300) (the thickness between the console and the passenger) to increase. As a result, the expanded cushion portion (300) can stably support the passenger's torso.

[0039] Specifically, the cushion part (300) may include a cushion body (310), a separation part (320), a first deformation part (301), and a second deformation part (302).

[0040] For convenience of explanation below, the direction facing the passenger based on the cushion part (300) is referred to as the inboard direction, and the direction opposite to the direction facing the passenger is referred to as the outboard direction.

[0041] The cushion body (310) may include an inboard surface (311) facing the passenger to be protected, and an outboard surface (312) facing the opposite direction of the inboard surface (311).

[0042] The cushion body (310) may include, for example, a first seat portion and a second seat portion that is sewn together with the first seat portion to form a chamber portion into which gas is supplied. Gas supplied to the inflator portion (200) may be supplied into the interior of the chamber portion. For example, an inboard surface (311) may be formed in the first seat portion, and an outboard surface (312) may be formed in the second seat portion. Additionally, it may include an inactive portion (315, 316) formed by joining a portion of the first seat portion and the second seat portion together.

[0043] The separating part (320) may be provided to separate a part of the cushion body (310) vertically.

[0044] Specifically, by cutting a portion of the area between the first sheet portion and the second sheet portion, a portion of the cushion body (310) can be separated vertically. Since the separation portion (320) separates a portion of the cushion body (310), gas can be moved through the remaining area. Through the separation portion (320), the upper and lower portions of the cushion portion (300) can be deformed independently of each other.

[0045] The first deformation part (301) is positioned at the bottom of the separation part (320) as a part of the cushion body (310) to protect the torso part of the passenger and can be deformed by the tether member (400).

[0046] The second deformation part (302) is positioned on the upper part of the separation part (320) as another part of the cushion body (310) to protect the passenger's head portion and can be deformed by the tether member (400).

[0047] The tether member (400) can induce the first deformation part (301) and the second deformation part (302) to deform independently of each other.

[0048] Specifically, by deforming the first deformation part (301) that protects the passenger's torso area and the second deformation part (302) that protects the head area separately, the thickness of the first deformation part (301) area of ​​the cushion part (300) can be increased. In conventional side airbags, only the upper area of ​​the cushion part (300) is induced to deform by the tether member (400), so the expanded volume of the lower area of ​​the cushion part (300) that supports the torso area is insufficient, resulting in a problem where the passenger's torso is not sufficiently supported.

[0049] To solve this problem, the present invention can induce deformation in which the lower region, as well as the upper region, is bent separately. That is, as the first deformation part (301) is pulled and bent by the tether member (400), the gas to be supplied to the bent part can be filled into the remaining area of ​​the lower region of the cushion part (300). As a result, when the cushion part (300) expands, the thickness in the direction from the inboard surface (311) to the outboard surface (312) of the cushion body (310) can be increased.

[0050] Accordingly, since the first deformation part (301) of the present invention is deformed, the passenger torso support force of the cushion part (300) is increased, effectively restraining the torso, and thereby reducing the movement of the passenger's head. With the movement of the passenger's torso and head minimized, the passenger head area can be additionally protected by the deformation of the second deformation part (302). Thus, the passenger can be safely protected by preventing neck injury.

[0051] The first embodiment of the present invention can implement the first deformation part (301) and the second deformation part (302) by having the tether member (400) penetrate the cushion body (310) in four or more places and forming a separation part (320) in the cushion body (310).

[0052] The cushion portion (300) may include a through hole portion (330), and the through hole portion (330) may be formed to penetrate the inboard surface (311) and the outboard surface (312) of the cushion body (310) and provided to allow the tether member (400) to pass through. The through hole portion (330) may include a plurality of through holes, and the path of the tether member (400) may be determined according to the position of the through holes.

[0053] Specifically, the pass-through hole section (330) may include a first pass-through hole (331), a second pass-through hole (332), a third pass-through hole (333), and a fourth pass-through hole (334).

[0054] The first through hole (331) can penetrate the first deformation part (301). For example, the first through hole (331) can be located in the middle area of ​​the cushion body (310) and can be formed adjacent to the top of the first deformation part (301), that is, the separation part (320).

[0055] The second through hole (332) penetrates the first deformation part (301) and is formed spaced apart from the first through hole (331) in a direction toward the edge of the cushion body (310) and can be formed adjacent to the separation part (320). For example, the second through hole (332) can be formed adjacent to the separation part (320) but at a lower position than the first through hole (331), and can be formed spaced apart in the opposite direction toward the inflator part (200) from the first through hole (331).

[0056] The third through hole (333) can penetrate the second deformation part (302). The fourth through hole (334) can penetrate the second deformation part (302) and be formed spaced apart from the third through hole (333) in a direction toward the upper edge of the cushion body (310).

[0057] For example, the third through hole (333) may be formed in the center area of ​​the cushion body (310). The fourth through hole (334) may be formed at a higher position than the third through hole (333) and may be formed spaced apart in the opposite direction toward the inflator part (200) of the third through hole (333).

[0058] Here, the first through hole (331) and the third through hole (333) can be formed in the inactive parts (315, 316) described above. By doing so, damage to the cushion body (310) by the through hole part (330) can be minimized when tension is applied to the tether member (400).

[0059] The tether member (400) can pass through the aforementioned through-hole portion (330) and can be divided into five regions based on the through-hole portion (330). Specifically, the tether member (400) may include a first tether portion (410), a second tether portion (420), a third tether portion (430), a fourth tether portion (440), and a fifth tether portion (450). Additionally, the tether member (400) may include a first fixing portion (401) and a second fixing portion (402) at both ends.

[0060] The first fixing part (401) and the second fixing part (402) can be fixed to the cushion body (310) and the seat frame. By doing so, tension can be generated in the tether member (400) when the cushion part (300) is deployed.

[0061] The first tether portion (410) may be provided such that one end is fixed to the lower part of the cushion body (310) and the other end reaches the first through hole (331).

[0062] The second tether portion (420) may be provided to extend through the first through hole (331) at the other end of the first tether portion (410) and reach the second through hole (332).

[0063] The third tether portion (430) may be provided to extend through the second through hole (332) at the end of the second tether portion (420) and reach the third through hole (333).

[0064] The fourth tether portion (440) may be provided to extend through the third through hole (333) at the end of the third tether portion (430) and reach the fourth through hole (334).

[0065] The fifth tether portion (450) may be provided to extend through the fourth through hole (334) at the end of the fourth tether portion (440) and to be fixed to the cushion body (310).

[0066] Here, the second pass hole (332) and the third pass hole (333) are formed facing each other with the separation part (320) in between, and the third tether part (430) may be provided to pass through the separation part (320) when extending from the second pass hole (332) to the third pass hole (333).

[0067] In addition, the first tether portion (410) according to the first embodiment of the present invention may be disposed on the inboard surface (311), and the second tether portion (420) may be disposed on the outboard surface (312).

[0068] Accordingly, when tension is generated in the tether member (400), the second tether member (420) can cause the first deformation member (301) to bend in the inboard direction. As gas is supplied to the cushion member (300), the tension generated in the tether member (400) can gradually increase, and accordingly, as the first deformation member (301) is continuously deformed, the thickness of the lower region of the cushion body (310) can increase.

[0069] Meanwhile, the third tether portion (430) may be placed on the inboard surface (311), and the fourth tether portion (440) may be placed on the outboard surface (312).

[0070] Accordingly, when tension is applied to the tether member (400), the fourth tether member (440) can cause the second deformation member (302) to bend in the inboard direction. Accordingly, the upper region of the cushion body (310) can protect the passenger's head.

[0072] Meanwhile, a side airbag device (100) according to a second embodiment of the present invention will be described below with reference to FIGS. 5 to 8. The side airbag device (100) according to the second embodiment of the present invention differs from the first embodiment of the present invention described above in the deformation direction of the first deformation part (301). The second embodiment differs from the first embodiment in the through hole part (330) and the tether member (400). Below, a detailed description of the same configuration as described in the first embodiment is omitted. Also, for convenience of explanation, the same reference numerals are used for the same configuration as in the first embodiment in the second embodiment.

[0073] Referring to FIGS. 5 to 8, in a side airbag device (100) according to a second embodiment of the present invention, the through hole portion (330) may further include a second-1 through hole (332-1).

[0074] The second-1 through hole (332-1) may be formed between the second through hole (332) and the separator (320). Specifically, the second-1 through hole (332-1) may be formed through adjacent to the upper part of the second through hole (332).

[0075] The tether member (400) may include a first tether portion (410), a second tether portion (420), a second-1 tether portion (420-1), a third tether portion (430), a fourth tether portion (440), and a fifth tether portion (450).

[0076] The first tether portion (410) has one end fixed to the lower part of the cushion body (310) and the other end reaching the first through hole (331) and can be placed on the outboard surface (312).

[0077] The second tether portion (420) extends through the first through hole (331) at the other end of the first tether portion (410), reaches the second through hole (332), and can be placed on the inboard surface (311).

[0078] The second-1 tether portion (420-1) extends through the second through hole (332) at the end of the second tether portion (420) and reaches the second-1 through hole (332-1), and can be placed on the outboard surface (312).

[0079] The third tether portion (430) extends through the second-1 through hole (332-1) at the end of the second-1 tether portion (420-1), reaches the third through hole (333), and can be placed on the inboard surface (311).

[0080] The fourth tether portion (440) extends through the third through hole (333) at the end of the third tether portion (430), reaches the fourth through hole (334), and can be placed on the outboard surface (312).

[0081] The fifth tether portion (450) can be extended through the fourth through hole (334) at the end of the fourth tether portion (440) and fixed to the cushion body (310).

[0082] Specifically, the second embodiment of the present invention may further include a second-1 through hole (332-1) and a second-1 tether part (420-1) in contrast to the first embodiment described above in order to bend the first deformation part (301) in the outboard direction.

[0083] In addition, the first tether portion (410) may be placed on the outboard surface (312), and the second tether portion (420) may be placed on the inboard surface (311). Accordingly, when tension is generated in the tether member (400) due to the expansion of the cushion portion (300), the second deformation portion (302) may be deformed to bend in the outboard direction by the second tether portion (420). As gas is supplied to the cushion portion (300), the tension generated in the tether member (400) may gradually increase, and accordingly, as the first deformation portion (301) is continuously deformed, the thickness of the lower region of the cushion body (310) may increase.

[0084] Since the second deformation part (302) is provided in the area that supports the passenger's torso, its thickness increases when it is bent in either the inboard direction or the outboard direction, thereby stably supporting the torso.

[0085] Meanwhile, the third tether portion (430) may be placed on the inboard surface (311), and the fourth tether portion (440) may be placed on the outboard surface (312).

[0086] Specifically, the second-1 tether portion (420-1) extending from the second tether portion (420) can pass through the second-1 through hole (332-1) after being placed on the outboard surface (312). By doing so, the third tether portion (430) extending from the second-1 through hole (332-1) can be placed on the inboard surface (311), and the fourth tether portion (440) can be placed on the outboard surface (312). That is, the third tether portion (430) and the fourth tether portion (440) according to the second embodiment can be placed on the same surface as in the first embodiment.

[0087] Accordingly, when tension is applied to the tether member (400), the fourth tether member (440) can cause the second deformation member (302) to bend in the inboard direction. Accordingly, the upper region of the cushion body (310) can protect the passenger's head.

[0088] Hereinafter, a method for manufacturing a side airbag device according to an embodiment of the present invention is described. The method for manufacturing a side airbag according to an embodiment of the present invention is a method for manufacturing a side airbag device (100) according to the above-described embodiment of the present invention, and below, a detailed description of a configuration identical to the above-described configuration is omitted.

[0089] The method for manufacturing a side airbag according to the present invention includes a first step, a second step, and a third step.

[0090] The first step is to prepare a cushion part (300) equipped with a cushion body (310), a separating part (320) that separates the cushion body (310) vertically, and a through hole part (330) that penetrates the inboard surface (311) and the outboard surface (312) of the cushion body (310). Here, the cushion body (310) may include a first sheet part forming the inboard surface (311) and a second sheet part forming the outboard surface (312).

[0091] The second step is to overlap the first sheet portion and the second sheet portion and sew them together. In the second step, the edges of the first sheet portion and the edges of the second sheet portion can be sewn together and joined, and a chamber portion can be formed between the first sheet portion and the second sheet portion.

[0092] The third step is to install the tether member (400) so that it penetrates the through hole (330) and surrounds the cushion part (300).

[0093] Here, the third step is characterized by installing a tether member (400) such that when the cushion part (300) is deployed, the tether member (400) induces the upper region and the lower region of the cushion part (300) to deform independently.

[0094] More specifically, the cushion portion (300) may include a first deformation portion (301) disposed at the lower part of the separation portion (320) and a second deformation portion (302) disposed at the upper part of the separation portion (320), and the first deformation portion (301) and the second deformation portion (302) may be deformed by a tether member (400). The first deformation portion (301) may be provided to protect the torso portion of the passenger as a part of the cushion body (310), and the second deformation portion (302) may be provided to protect the head portion of the passenger as another part of the cushion body (310).

[0095] In the third step, the tether member (400) can pass through the first pass hole (331) and the second pass hole (332) provided in the first deformation part (301), and then pass through the third pass hole (333) and the fourth pass hole (334) provided in the second deformation part (302). Additionally, when the tether member (400) extends from the second pass hole (332) to the third pass hole (333), it can pass through the separation part (320). As such, according to an embodiment of the present invention, since the first deformation part is deformed, the passenger torso support force of the cushion part is increased, effectively restraining the torso, and thereby reducing the movement of the passenger's head. In addition, while the movement of the passenger's torso and head is minimized, the passenger head area can be additionally protected by the deformation of the second deformation part.

[0096] Therefore, according to an embodiment of the present invention, neck injury to a passenger can be prevented and the passenger can be safely protected during a vehicle collision.

[0098] Although specific embodiments of the present invention have been described above, the spirit and scope of the present invention are not limited to these specific embodiments, and various modifications and variations are possible by those skilled in the art without altering the gist of the invention as described in the claims. Explanation of the symbols

[0100] 100: Side airbag unit 200: Inflator unit 300: Cushion part 310: Cushion body 311: Inboard side 312: Outboard side 315, 316: Inactive section 320: Separation section 301: 1st transformation part 302: 2nd transformation part 330: Pass-through hole section 331: First pass-through hole 332: 2nd Passage Hole 332-1: 2-1st Passage Hole 333: 3rd Passage Hole 334: 4th Passage Hole 400: Tether member 401: First fixing part 402: Second fixed part 410: First tether part 420: 2nd Tether Section 420-1: 2-1st Tether Section 430: 3rd Tether Section 440: 4th Tether Section 450 : 5th Tether

Claims

Claim 1 An inflator part mounted on a seat frame provided for a passenger to sit on and discharging gas; a cushion part including a cushion body and connected to the inflator part, which expands toward the passenger's side by gas discharged from the inflator part; and a tether member arranged to penetrate and surround the cushion part and controlling the expansion shape of the cushion part when the cushion part is expanded, wherein the tether member includes a first fixing part and a second fixing part at both ends, and the first fixing part and the second fixing part are fixed to the cushion body and the seat frame, and the tether member induces the upper region and the lower region of the cushion part to deform independently, and the cushion part includes a separating part that separates a part of the cushion body vertically; a first deformation part provided to protect the passenger's torso part and deformed by the tether member; and a second deformation part provided to protect the passenger's head part and deformed by the tether member. and a passage hole portion including four passage holes formed to penetrate the cushion body and through which the tether member passes; wherein the tether member passing through the four passage holes induces the first deformation portion and the second deformation portion to deform independently of each other, and the tether member is divided into five regions based on the passage hole portion, and the five regions include two regions positioned in a direction facing the passenger and two regions positioned opposite to the direction facing the passenger, the first deformation portion is positioned at the lower part of the separation portion and the second deformation portion is positioned at the upper part of the separation portion, and the four passage holes include: a first passage hole formed at the uppermost part of the first deformation portion adjacent to the separation portion and penetrating the first deformation portion; and a second passage hole formed adjacent to the separation portion and penetrating the first deformation portion, spaced apart from the first passage hole in a direction toward the edge of the cushion body at a position lower than the first passage hole. A third through hole that penetrates the second deformation part and is formed in the center region of the cushion body;A side airbag device characterized by including a fourth through hole that penetrates the second deformation part and is formed at a position higher than the third through hole, spaced apart from the third through hole in a direction toward the upper edge of the cushion body. Claim 2 A side airbag device according to claim 1, characterized in that the cushion body includes an inboard surface facing the passenger to be protected and an outboard surface facing the opposite direction of the inboard surface. Claim 3 delete Claim 4 delete Claim 5 A side airbag device according to claim 2, wherein the cushion body comprises a first seat portion, a second seat portion formed by sewing together with the first seat portion to form a chamber portion into which gas is supplied, and an inactive portion formed by joining a portion of the first seat portion and the second seat portion, and wherein the first through hole and the third through hole are formed in the inactive portion. Claim 6 A side airbag device according to claim 2, wherein the tether member comprises: a first tether portion having one end fixed to the lower part of the cushion body and the other end reaching the first through hole; a second tether portion extending from the other end of the first tether portion through the first through hole and reaching the second through hole; a third tether portion extending from the end of the second tether portion through the second through hole and reaching the third through hole; a fourth tether portion extending from the end of the third tether portion through the third through hole and reaching the fourth through hole; and a fifth tether portion extending from the end of the fourth tether portion through the fourth through hole and fixed to the cushion body. Claim 7 A side airbag device according to claim 6, wherein the second through hole and the third through hole are formed opposite each other with the separating part in between, the third tether part is provided to pass through the separating part when extending from the second through hole to the third through hole, the third tether part is disposed on the inboard surface, the fourth tether part is disposed on the outboard surface, the first tether part is disposed on the inboard surface, and the second tether part is disposed on the outboard surface. Claim 8 delete Claim 9 delete Claim 10 In paragraph 2, the through hole portion further includes a second-1 through hole formed between the second through hole and the separating portion, and the tether member comprises: a first tether portion having one end fixed to the lower part of the cushion body and the other end reaching the first through hole and disposed on the outboard surface; a second tether portion extending from the other end of the first tether portion through the first through hole, reaching the second through hole and disposed on the inboard surface; a second-1 tether portion extending from the end of the second tether portion through the second through hole, reaching the second-1 through hole and disposed on the outboard surface; a third tether portion extending from the end of the second-1 tether portion through the second-1 through hole, reaching the third through hole and disposed on the inboard surface; and a fourth tether portion extending from the end of the third tether portion through the third through hole, reaching the fourth through hole and disposed on the outboard surface. A side airbag device characterized by including a fifth tether portion that extends through the fourth through hole at the end of the fourth tether portion and is fixed to the cushion body. Claim 11 delete Claim 12 delete

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