KR20240060174A - Airbag cushion and curtain aibbag device - Google Patents

Abstract

The airbag cushion according to an embodiment of the present invention is installed in a negative pressure vehicle in which a partition extending upward and downward along the B-pillar trim covering the B-pillar is installed, and is mounted on the vehicle body in a folded state on the upper part of the B-pillar, and is installed on the vehicle body in a folded state. It may include a cushion body that expands and is deployed between the B pillar trim and the bulkhead, and a tether that connects one side of the cushion body to the vehicle body to maintain the cushion body's deployed shape.

Description

Airbag cushion and curtain airbag device {AIRBAG CUSHION AND CURTAIN AIBBAG DEVICE}

The present invention relates to airbag cushion and curtain airbag devices.

Special vehicles for medical purposes must be equipped with a variety of medical equipment and facilities for emergency treatment and procedures to provide emergency treatment to a variety of patients in emergency situations. In particular, in the case of respiratory diseases, it is necessary to have negative pressure equipment to prevent germs from spreading from the patient to the outside, and negative pressure vehicles are designed to meet these requirements.

In the case of a negative pressure vehicle, the basic system configuration is almost the same as that of a regular vehicle, but an additional partition is installed inside the vehicle to maintain the negative pressure within the isolation space.

Since these bulkheads are installed in a structure that is closely attached to the interior of the vehicle, in the case of existing curtain airbags, a problem occurs in which the cushion cannot be deployed normally due to interference from the bulkhead.

Therefore, there is a need to improve this.

The present invention is intended to solve the above problems, and the problem to be solved by the present invention is to provide an airbag cushion and curtain airbag device that can be deployed normally in a structure in which a vehicle structure is installed on the B-pillar trim, such as a negative pressure vehicle with a partition installed. is to provide.

The problem of the present invention is not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

The airbag cushion according to an embodiment of the present invention is installed in a negative pressure vehicle in which a partition extending upward and downward along the B-pillar trim covering the B-pillar is installed, and is mounted on the car body in a folded state on the upper part of the B-pillar, It may include a cushion body that expands with gas and is deployed between the B-pillar trim and the bulkhead, and a tether that connects one side of the cushion body to the vehicle body to maintain the cushion body's deployed shape.

The cushion body has a non-expandable portion extending from the lower end toward the upper end of the cushion body at a position overlapping with the B-pillar trim, and when the cushion body is deployed, the non-expandable portion digs between the B-pillar trim and the partition wall. It may be configured to move downward and be divided into a front chamber and a rear chamber based on the partition wall.

The non-expandable portion may be formed to have a width wider than the width of the partition.

The cushion body may have a structure in which the front chamber and the rear chamber are continuously connected through a connection chamber provided in the upper area of the non-expandable portion.

The cushion body has an upper joint, a lower joint, and a side joint that are joined along the periphery of the edge, and the lower joint is a pair of first joints extending from both sides of the B-pillar trim to the upper joint along the B-pillar trim. It may include an extension part, a second extension part connected to the extended upper end of the first extension part and extending forward and backward of the cushion body, and a third extension part extending from both ends of the second extension part to the lower joint part. .

The non-expanded portion may be defined as an area surrounded by a pair of the first extension portion and a portion of the second extension portion connecting the upper end of the first extension portion.

The second extension extends horizontally in the rear chamber and extends in a downwardly inclined curve from the top of the non-expandable portion toward the front chamber, so that the connection chamber located between the second extension and the upper joint portion is It may have an asymmetric structure in which the cross-sectional size increases from the rear chamber to the front chamber.

The cushion body includes a first delay chamber provided between the third extension and the first extension in the front chamber and a second delay chamber provided between the third extension and the first extension in the rear chamber. The cushion body includes a chamber, and when deployed, the first delay chamber and the second delay chamber are deployed in a non-expanded state, and the first delay chamber and the second delay chamber are in a state in which the non-expanded portion moves downward. Can be configured to expand.

The cushion body may have an asymmetric structure in which the volume of the first delay chamber is relatively smaller than the volume of the second delay chamber.

The cushion body may have a gas introduction portion connected to the upper joint portion, and the gas introduction portion may be disposed on the second extension portion in the rear chamber.

The gas introduction portion may be provided with a diffuser pocket that distributes and supplies the gas to the front chamber and the rear chamber.

The curtain airbag device according to an embodiment of the present invention is installed in a negative pressure vehicle in which a partition extending upward and downward along the B-pillar trim covering the B-pillar is installed, and is mounted on the vehicle body in a folded state on the upper part of the B-pillar. airbag cushion; and an inflator connected to the airbag cushion and generating gas.

According to an embodiment of the present invention, an airbag cushion and curtain airbag device that allows normal deployment in a structure in which a vehicle structure is installed on the B-pillar trim, such as a negative pressure vehicle with a partition installed, can be provided.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a diagram schematically showing the interior of a negative pressure vehicle equipped with a partition wall.
Figure 2 is a diagram schematically showing a state in which a curtain airbag device according to an embodiment of the present invention is installed in the negative pressure vehicle of Figure 1.
Figure 3 is a diagram schematically showing the cushion body in the airbag cushion constituting the curtain airbag device.
Figure 4 is a view schematically showing a state in which the cushion body is expanded and deployed according to an embodiment of the present invention.

Since the present invention can be subject to various changes and can have various embodiments, specific embodiments will be illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. Terms containing ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, the second component may be referred to as the first component without departing from the scope of the present invention, and similarly, the first component may also be referred to as the second component. The term and/or includes any of a plurality of related stated items or a combination of a plurality of related stated items.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

In the description of the embodiment, in the case where one component is described as being formed “on or under” another component, (on or under) includes both components that are in direct contact with each other or one or more other components that are formed (indirectly) between the two components. Additionally, when expressed as 'on or under', it can include not only the upward direction but also the downward direction based on one component.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless clearly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

Hereinafter, embodiments will be described in detail with reference to the attached drawings, but identical or corresponding components will be assigned the same reference numbers regardless of reference numerals, and duplicate descriptions thereof will be omitted.

Figure 1 is a diagram schematically showing the interior of a negative pressure vehicle with a partition installed, Figure 2 is a diagram schematically showing a curtain airbag device according to an embodiment of the present invention installed in the negative pressure vehicle of Figure 1, and Figure 3 is a curtain airbag device. This is a diagram schematically showing the cushion body in the airbag cushion constituting the airbag device, and Figure 4 is a diagram schematically showing the cushion main body inflated and deployed according to an embodiment of the present invention.

The curtain airbag device 1 according to an embodiment of the present invention can be installed in a negative pressure vehicle.

A negative pressure vehicle may be equipped with a partition wall (SW) to isolate the rear space from the front driver's seat and passenger seat and maintain a negative pressure state inside the isolated rear space.

This bulkhead (SW) is installed on the B-pillar trim (TB) that covers the B-pillar (PB), and extends up and down along the B-pillar trim (TB) to form a loop in the width direction of the vehicle and is tightly attached to the inside of the vehicle. It can be provided as .

In an embodiment, the partition SW may be configured so that an edge portion in contact with the vehicle is formed in the form of a tube filled with air, and is in close contact with the inner surface of the vehicle by air pressure.

The curtain airbag device 1 according to an embodiment of the present invention may include an inflator 10 and an airbag cushion 20.

The inflator 10 is installed in the vehicle body (VF) connected to the A-pillar (PA), B-pillar (PB), and C-pillar (PC), and may be connected to the airbag cushion 20. This inflator 10 can generate gas according to a signal transmitted from an airbag controller (ACU), not shown.

The inflator 10 may be formed in a round bar shape, and a gas generator and an ignition device may be installed inside. In an embodiment, the inflator 10 may be provided in a cylindrical shape with an outlet at one end discharging gas.

The airbag cushion 20 is mounted on the vehicle body (VF) in a folded state on the upper part of the B pillar (PB), and can be arranged in a structure where both ends extend toward the A pillar (PA) and C pillar (PC), respectively. there is.

The airbag cushion 20 may include a cushion body 100 and a tether 200.

The cushion body 100 expands by the gas generated by the inflator 10, unfolds downward between the B pillar trim (TB) and the bulkhead (SW), and is disposed between the occupant and the door structure to protect the occupant. .

As shown in FIG. 3 , the cushion body 100 may be formed by flattening two panels 100a cut into a predetermined shape and joining (or sewing) the perimeter thereof. In an embodiment, the panel 100a may be made of a flexible fabric material, but is not limited thereto.

Referring to the drawings, the cushion body 100 may include an upper joint 101, a lower joint 102, and a side joint 103 joined along the edge.

The inner area surrounded by the upper joint 101, lower joint 102, and side joint 103 corresponds to the expansion area expanded by gas, and the outer area of the edge does not expand because gas is not injected. It may correspond to an expansion area.

As shown in the figure, the lower joint 102 includes a pair of first extensions 104 extending from both sides of the B pillar trim TB to the upper joint 101 along the B pillar trim TB, and a first extension A second extension portion 105 connected to the extended upper end of the portion 104 and extending forward and backward of the cushion body 100, and a second extension portion extending from both ends of the second extension portion 105 to the lower joint 102. 3 may include an extension portion 106.

In particular, the cushion body 100 has a non-expandable portion 110 extending from the lower end of the cushion body 100 toward the upper end at a position overlapping with the B pillar trim (TB) to minimize interference with the partition SW when the cushion body 100 is deployed downward. ) can be provided.

This non-expandable portion 110 is located at the upper end of the first extension portion 104 of the pair of first extension portions 104 and second extension portions 105 located side by side on both left and right sides of the B pillar trim (TB). It can be defined as an area with an approximate '∩' shape surrounded by connecting parts. In this case, the non-expanded portion 110 may be formed to have a width wider than the width of the partition SW.

That is, the cushion body 100 may be provided with a non-expandable portion 110 that partially extends upward into the inner expansion region at a position overlapping with the B-pillar trim TB among the non-expansion regions of the lower end. In addition, when the cushion body 100 is deployed, the non-expandable portion 110 moves downward, penetrating between the B pillar trim (TB) and the partition wall (SW), so that the front chamber ( It may be configured to be divided into a rear chamber (CB1) and a relatively large volume rear chamber (CB2).

In this way, the cushion body 100 is provided with a non-expansion portion 110, which is a non-expansion area, with respect to the portion where the partition wall (SW) is located, and the B pillar trim (TB) and the partition wall (SW ) to minimize interference from the partition wall (SW) by deploying downward between them. Accordingly, it is possible to prevent damage to the B pillar trim (TB) and bulkhead (SW) and secure deployability.

As shown in the drawing, the cushion body 100 has a structure in which the front chamber (CB1) and the rear chamber (CB2) are continuously connected through the connection chamber (CB3) provided in the upper area of the non-expandable portion (110). You can have

In an embodiment, the second extension portion 105 may extend horizontally from the rear chamber CB2 and may extend in a curved shape sloping downward from the top of the non-expandable portion 110 toward the front chamber CB1. Accordingly, the connection chamber CB3 located between the second extension 105 and the upper joint 101 may have an asymmetric structure in which the cross-sectional size increases from the rear chamber CB2 to the front chamber CB1. .

The cushion body 100 may include a gas introduction portion 130 connected to the upper joint 101. Gas generated by the inflator 10 may be introduced into the cushion body 100 through the gas introduction part 130.

The gas introduction part 130 may be disposed on the second extension part 105 in the rear chamber CB2.

The gas introduction unit 130 may be provided with a diffuser pocket 131 that distributes and supplies gas to the front chamber (CB1) and the rear chamber (CB2).

The diffuser pocket 131 has openings at the front and rear, and the opening on one side faces the rear chamber (CB2), and the opening on the other side may be arranged to face the connection chamber (CB3). Accordingly, the diffuser pocket 131 can supply part of the gas directly to the rear chamber (CB2), and the other part can be supplied to the front chamber (CB1) through the connection chamber (CB3).

In this case, as the diffuser pocket 131 is located on the rear chamber (CB2), gas is supplied to the rear chamber (CB2) first, causing a difference in expansion rate from the front chamber (CB1), which is caused by the above-mentioned connection chamber (CB3). ) can be solved through the asymmetric structure of That is, the connection chamber (CB3) has a structure in which the cross-sectional size increases as it moves toward the front chamber (CB1), so that even though the diffuser pocket 131 is located on the rear chamber (CB2), the amount of gas supplied to the front chamber (CB1) By increasing the number, the front chamber (CB1) and rear chamber (CB2) can be expanded at the same time.

As in the drawing, the cushion body 100 is provided in the first delay chamber CB4 and the rear chamber CB2 provided between the third extension part 106 and the first extension part 104 in the front chamber CB1. It may include a second delay chamber CB5 provided between the third extension part 106 and the first extension part 104.

In an embodiment, the volume of the first delay chamber CB4 may have an asymmetric structure in which the volume of the second delay chamber CB5 is relatively smaller.

The first delay chamber (CB4) and the second delay chamber (CB5) are patterned so that gas is filled through the space between the end of the third extension portion 106 and the lower joint 102, respectively, and are connected to the front chamber CB1 and the front chamber CB1. It may expand later than the posterior chamber (CB2).

Accordingly, when the cushion body 100 is deployed, the first delay chamber (CB4) and the second delay chamber (CB5) are deployed in a non-expanded state, and the first delay chamber (CB5) is expanded in a state in which the non-expanded portion 110 moves downward. CB4) and the second delay chamber (CB5) may be configured to expand.

In this way, the first delay chamber (CB4) and the second delay chamber (CB5) located on both sides of the non-expansion part 110 are delayed in expansion, so that the non-expansion part 110 is connected to the B pillar trim (TB) and the partition wall (SW). Ensure that it can unfold smoothly downward through the space.

In addition, the first delay chamber (CB4) and the second delay chamber (CB5) are expanded so that the partition wall (SW) is tightly sandwiched between the first delay chamber (CB4) and the second delay chamber (CB5), thereby creating a cushion By reducing the fluidity due to deployment of the main body 100, it is possible to prevent the deployment positions of the front chamber (CB1) and the rear chamber (CB2) from being misaligned with the occupant's position, thereby preventing the occupant from being protected.

The tether 200 connects one side of the cushion body 100 to the vehicle body (VF) so that the cushion body 100 maintains its deployed shape.

One end of the tether 200 may be connected to the non-expandable area provided at the front end of the front chamber CB1, and the other end may be connected to the A-pillar (PA) of the vehicle through the fixing means 210.

This tether 200 can prevent the front chamber (CB1) from contracting toward the B pillar (PB) during the process of deploying the cushion body 100 and failing to maintain its deployed shape. That is, it is possible to prevent the front chamber (CB1) from contracting so that the cushion body 100 is caught in the partition wall (SW), and thus preventing the front chamber (CB1) from expanding normally.

Depending on the embodiment, a tether (not shown) may be further provided, one end of which is connected to the non-expansion area provided at the rear end of the rear chamber (CB2), and the other end of which is connected to the C-pillar (PC).

As described above, the curtain airbag device 1 according to an embodiment of the present invention is installed in a negative pressure vehicle with a partition wall (SW) extending up and down along the B-pillar trim (TB), and a cushion body that is inflated by gas. (100) is a non-expanded portion 110 formed at a position overlapping with the B pillar trim (TB) in the process of expanding downward between the B pillar trim (TB) and the partition (SW). ) and moves downward to divide the chamber into a front chamber (CB1) with a relatively small volume and a rear chamber (CB2) with a relatively large volume based on the partition wall (SW).

Accordingly, in a structure in which the partition wall (SW) is in close contact with the B pillar trim (TB), the cushion body 100 unfolds downward between the B pillar trim (TB) and the partition wall (SW) through the non-expandable portion 110. As a result, interference with the partition wall (SW) can be minimized, and thus the cushion body 100 can be deployed normally.

Although the present invention has been described above with reference to embodiments, those skilled in the art can make various modifications and modifications to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can change it. And, the differences related to these modifications and changes should be construed as being included in the scope of the present invention as defined in the appended claims.

1: Curtain airbag device 10: Inflator
20: Airbag cushion 100: Cushion body
100a: Panel 101: Upper joint
102: lower joint 103: side joint
104: first extension 105: second extension
106: third extension part 110: non-expansion part
130: Gas introduction 131: Diffuser pocket
200: Tether 210: Fixing means
PA: A pillar PB: B pillar
PC: C pillar TB: B pillar trim
SW: Bulkhead VF: Body

Claims (12)

It is installed in a negative pressure vehicle in which a partition extending upward and downward along the B-pillar trim covering the B-pillar is installed. It is mounted on the car body in a folded state on the upper part of the B-pillar, expands by gas, and is connected to the B-pillar trim and the An airbag cushion including a cushion body deployed between bulkheads and a tether that connects one side of the cushion body to the vehicle body to maintain the cushion body in its deployed shape.
According to paragraph 1,
The cushion body has a non-expandable portion extending from the lower end of the cushion body toward the upper end at a position overlapping the B pillar trim,
The cushion body is configured to be divided into a front chamber and a rear chamber based on the bulkhead by moving downward while the non-expandable portion penetrates between the B pillar trim and the bulkhead when deployed.
According to paragraph 2,
An airbag cushion in which the non-inflatable portion is formed to have a width wider than the width of the bulkhead.
According to paragraph 2,
The cushion body has a structure in which the front chamber and the rear chamber are continuously connected through a connection chamber provided in the upper area of the non-inflatable portion.
According to paragraph 4,
The cushion body has an upper joint, a lower joint, and a side joint that are joined along the edge,
The lower joint includes a pair of first extensions extending from both sides of the B-pillar trim to the upper joint along the B-pillar trim, connected to the extended upper end of the first extension, and extending before and after the cushion body. An airbag cushion including a second extension portion and a third extension portion extending from both ends of the second extension portion to the lower joint portion.
According to clause 5,
The non-inflatable portion is defined as an area surrounded by a pair of the first extension portion and a portion of the second extension portion connecting the upper end of the first extension portion.
According to clause 5,
The second extension extends horizontally in the rear chamber and extends in a downwardly inclined curve from the top of the non-expandable portion toward the front chamber, so that the connection chamber located between the second extension and the upper joint is An airbag cushion having an asymmetric structure in which the cross-sectional size increases from the rear chamber to the front chamber.
According to clause 5,
The cushion body includes a first delay chamber provided between the third extension and the first extension in the front chamber and a second delay chamber provided between the third extension and the first extension in the rear chamber. Contains a chamber,
The cushion body is configured such that when deployed, the first delay chamber and the second delay chamber are deployed in a non-expanded state, and the first delay chamber and the second delay chamber are expanded while the non-expandable portion moves downward. Airbag cushion.
According to clause 8,
The cushion body is an airbag cushion having an asymmetric structure in which the volume of the first delay chamber is relatively smaller than the volume of the second delay chamber.
According to clause 5,
The airbag cushion wherein the cushion body has a gas introduction portion connected to the upper joint, and the gas introduction portion is disposed on the second extension portion in the rear chamber.
According to clause 10,
An airbag cushion wherein the gas introduction portion is provided with a diffuser pocket that distributes and supplies the gas to the front chamber and the rear chamber.
It is installed in a negative pressure vehicle in which a partition extending upward and downward along the B-pillar trim covering the B-pillar is installed, and includes an airbag cushion mounted on the vehicle body in a folded state on the upper part of the B-pillar; and
an inflator connected to the airbag cushion and generating gas;
Including,
The airbag cushion is a curtain airbag device including the airbag cushion according to claim 1.

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