Airbag mounted on a door and control method for deploying the airbag

Abstract

A door-mounted airbag and a control method of deploying the airbag are proposed. The door-mounted airbag is configured to minimize injury to a passenger on a two-wheeled vehicle and a passenger in the vehicle when the passenger on the two-wheeled vehicle collides with a door, and includes an airbag mounted to the door, and a bumper pad provided in the airbag and configured to be deployed in an inward direction of the door and in a form to cover an inner surface of a door trim and an edge of a rear end of the door.

Description

TECHNICAL FIELD

[0001] The present application relates to a door-mounted airbag capable of minimizing injuries to a passenger on a two-wheeled vehicle and a passenger in a vehicle when the passenger on the two-wheeled vehicle hits a door of the vehicle and a control method for deploying the door-mounted airbag. BACKGROUND

[0002] In the case where a passenger in a vehicle opens a door of the vehicle after the vehicle stops, an accident in which a passenger on a two-wheeled vehicle such as a bicycle collides with an edge of the opened door occurs when the two-wheeled vehicle approaches the vehicle from a rear-lateral location of the vehicle at a high speed.

[0003] Among accidents between a vehicle and a two-wheeled vehicle, 7% are accidents in which the two-wheeled vehicle collides with an opened door, and among these accidents, 63% are moderate or severe injuries (AIS 2+).

[0004] As described above, the frequency of collisions between a two-wheeled vehicle and an opened door and the degree of injuries to passengers are not low.

[0005] Therefore, in order to prevent such collision accidents, the European NCAP is planning to evaluate the application of a technology configured to detect the presence of a two-wheeled vehicle approaching from a rear-lateral location of a vehicle when a driver's seat door is opened and to alert the driver or instantaneously prevent the door from being opened.

[0006] However, even if a warning device for a two-wheeled vehicle approaching from a rear-lateral location is installed to a vehicle, a collision between a two-wheeled vehicle and a door can occur in the following cases.

[0007] First, a collision can occur when the speed of a two-wheeled vehicle approaching from a rear-lateral location is too high or when a driver quickly opens a door with a strong force.

[0008] In addition, a collision can occur even when a driver ignores a warning of a vehicle or a door stops, or when sensing of a two-wheeled vehicle approaching from a rear-lateral location is delayed due to a rear obstacle.

[0009] The above is only to help understanding the background of the present application and does not mean that the present application falls within the scope of the prior art known to those skilled in the art. SUMMARY

[0010] The present application has been made in consideration of the above-mentioned problems occurring in the related art, and aims to provide a door-mounted airbag capable of minimizing injuries to a passenger on a two-wheeled vehicle and a passenger in a vehicle when the passenger on the two-wheeled vehicle hits a door of the vehicle and a control method for deploying the door-mounted airbag.

[0011] To achieve the above object, according to one aspect of the present application, there is provided a door-mounted airbag including: an airbag mounted to a door; and a cushion provided in the airbag and configured to deploy in an inward direction of the door and configured to deploy in a form that can cover an inner surface of a door trim and an edge of a rear end of the door.

[0012] The trim deployment area deployed at the inner surface of the door trim can be configured to deploy preferentially to an edge deployment area deployed at the edge of the rear end of the door.

[0013] The edge deployment area deployed at the edge of the rear end of the door can be configured to deploy to be equal to or longer than a vertical length of the edge of the rear end of the door.

[0014] The edge deployment area deployed at the edge of the rear end of the door can be configured to deploy in a form that can extend rearward from the edge of the rear end of the door.

[0015] The trim deployment area deployed at the inner surface of the door trim can be configured to deploy at a position corresponding to a lower body including a pelvis of a passenger seated in a seat; and the edge deployment area deployed at the edge of the rear end of the door can be configured to deploy at a position corresponding to an upper body of the passenger seated in the seat.

[0016] The door-mounted airbag can include a door panel provided inside the door to which the airbag can be mounted, and a door trim fitted to the door in a form that can cover the door panel, the door trim having a matching hole matching an outer shape of the airbag so that the airbag is matched with and inserted into the matching hole.

[0017] The cushion of the airbag can be stored inside a case and covered by a cover in which a tear line can be formed; and the cover can be disposed in a direction toward the door trim, so the cushion can be deployed in the inward direction of the door by passing through the tear line.

[0018] The cover can be matched with an inner space of the matching hole.

[0019] The door panel and the case can be mounted to each other using a mounting bracket as a medium, and the case can be coupled to the mounting bracket together with an inflator.

[0020] The cushion can be configured to deploy in a form that can be bent toward an outer space of the door from the edge of the rear end of the door.

[0021] The airbag installed in the door can include an external sensor configured to detect an object approaching the vehicle from a side rear position of the vehicle, a door sensor configured to detect an open state of the door, and a controller determining a probability of collision between the object and the door based on values detected by the external sensor and the door sensor when the door is opened, and controlling the cushion such that the cushion is deployed when it is determined that the probability of collision is high.

[0022] The controller can include a braking distance calculation portion configured to calculate a minimum braking distance of the object by using a speed of the object approaching the vehicle and a distance from the door, a clearance angle calculation portion configured to calculate whether the door can be opened and calculate a clearance angle, and a deployment signal output portion applying a deployment signal such that the cushion is deployed when the object enters within the minimum braking distance and the clearance angle of the door exceeds a predetermined angle.

[0023] A control method for deploying an airbag installed in a door can include determining, by a controller, a probability of collision between an object approaching from a side rear position of a vehicle and the door when the door is opened, and controlling, by the controller, a cushion such that the cushion can be deployed when it is determined that the probability of collision is high.

[0024] The control method can include calculating a braking distance, calculating a minimum braking distance of the object by using a speed of the object approaching the vehicle and a distance from the door, calculating a clearance angle, calculating whether the door can be opened and calculating a clearance angle, and outputting a deployment signal, applying the deployment signal such that the cushion can be deployed when the object enters within the minimum braking distance and the clearance angle of the door exceeds a predetermined angle.

[0025] As described above, the airbag installed in the door according to the present application has the following effects. When a two-wheeled vehicle collides with the door, the passenger on the two-wheeled vehicle is prevented from directly colliding with the door but collides with the cushion, so that the risk of injury of the passenger on the two-wheeled vehicle and the passenger in the vehicle due to the collision with the door can be minimized, and both the passenger on the two-wheeled vehicle and the passenger in the vehicle can be safely protected. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a view showing an airbag installed in a door according to the present application.

[0027] Figure 2 is a view showing Figure 1 in the cushion deployment form.

[0028] Figure 3 is a plan view showing Figure 2 the deployed cushion.

[0029] Figure 4is a view showing the cushion according to the present application deployed in the case of a side collision.

[0030] Figure 5 is a front view showing the cushion in Figure 4 .

[0031] Figure 6 is a view showing a door trim extracted from Figure 1 .

[0032] Figure 7 is an exploded view showing the airbag according to the present application.

[0033] Figure 8 is a view showing a mounting bracket mounted to the housing of the airbag according to the present application.

[0034] Figure 9 is a plan view showing the cushion in Figure 1 .

[0035] Figure 10 is a block diagram showing a deployment control system of the cushion according to the present application.

[0036] Figure 11 is a flowchart showing in its entirety a control method for deploying the cushion according to the present application. DETAILED DESCRIPTION

[0037] In the following description, structural or functional descriptions designated to the exemplary embodiments of the concept according to the present application are intended to describe the exemplary embodiments, and thus it should be understood that the present application can be implemented in various ways without being limited to the exemplary embodiments.

[0038] The embodiments described herein can be changed in various ways and various shapes, and thus the detailed description of the specific embodiments is shown in the accompanying drawings and will be described in detail in the present specification. However, it should be understood that the exemplary embodiments of the concept according to the present application are not limited to the embodiments to be described below with reference to the accompanying drawings, but all modifications, equivalents, and substitutions are included within the scope and spirit of the present application.

[0039] It should be understood that although the terms first and / or second, etc. can be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element discussed below could be termed a second element without departing from the teachings of the present application. Similarly, a second element could be termed a first element.

[0040] It will be understood that when an element is referred to as being "connected to" or "coupled to" another element, it can be directly connected or coupled to the other element or connected or coupled to the other element with other elements interposed therebetween. On the other hand, it will be understood that when an element is referred to as being "directly connected to" or "directly coupled to" another element, it can be connected or coupled to the other element without other elements interposed therebetween. Also, the terms describing the relationship between elements, i.e., "between," "directly between," "adjacent to," or "directly adjacent to," used herein should be interpreted in the same way as described above.

[0041] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Singular forms are intended to include the plural forms, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" or "has," when used herein, specify the presence of stated features, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, numerals, steps, operations, components, parts, or combinations thereof.

[0042] Unless otherwise defined, all terms used herein including technical terms and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It must be understood that the terms defined by dictionaries and the meanings of the terms are the same as those commonly understood by those skilled in the relevant art, and they should not be ideally or excessively formally defined unless the context clearly dictates otherwise.

[0043] Hereinafter, one exemplary embodiment of the present application will be described in detail with reference to the accompanying drawings.

[0044] Figure 1 is a view showing an airbag 200 mounted to a door 100 according to the present application. Figure 2 is a view showing Figure 1 is a view showing a deployed form of a cushion 210.

[0045] Referring to the drawings, a door-mounted airbag 200 of the present application includes an airbag 200 mounted to a door 100, and a cushion 210 provided in the airbag 200 and deployed in an inward direction of the door 100 and deployed in a form covering an inner surface of a door trim 120 and a rear end edge of the door 100.

[0046] For example, the cushion 210 is mounted to be deployed inward from the door 100.

[0047] Specifically, when the cushion 210 is deployed inward from the door 100, the cushion 210 is deployed in a form covering a part or all of the door trim 120, and deployed toward a rear end of the door 100, and deployed in a form covering an end of the rear end of the door 100.

[0048] In other words, when a two-wheeled vehicle approaches from a side rear position of the vehicle at high speed while the vehicle is stopped and the door 100 is opened, the cushion 210 is deployed to cover the opened edge portion of the rear end of the door 100.

[0049] Accordingly, when the two-wheeled vehicle collides with the door 100, the passenger on the two-wheeled vehicle is prevented from directly colliding with the door 100, but rather collides with the cushion 210 deployed at the edge of the door 100. Accordingly, when the two-wheeled vehicle collides with the door 100, the risk of injury to the passenger on the two-wheeled vehicle is reduced, and the cushion 210 is deployed at the inner surface of the door 100 in order to protect the passenger opening the door 100 from impact with the passenger on the two-wheeled vehicle.

[0050] Further, the airbag of the present application has a structure in which the trim deployment area A1 deployed at the inner surface of the door trim 120 is deployed preferentially to the edge deployment area A2 deployed at the edge of the rear end of the door 100.

[0051] Specifically, the entire deployment area of the cushion 210 is roughly divided into the trim deployment area A1 and the edge deployment area A2.

[0052] As described above, the trim deployment area A1 and the edge deployment area A2 are divided from each other in response to the deployment area. The boundary between the trim deployment area A1 and the edge deployment area A2 can be formed to be physically separated from each other, but the boundary between the trim deployment area A1 and the edge deployment area A2 can be formed to be completely communicated with each other such that the cushion 210 is rapidly deployed.

[0053] Further, the cushion 210 includes an inflator 240 for supplying gas. The inflator 240 generates gas by receiving a signal of a controller 500 to be described below, and the generated gas is supplied into the cushion 210.

[0054] Specifically, the inflator 240 is connected to the trim deployment area A1 such that the gas generated from the inflator 240 is supplied to the trim deployment area A1, thereby causing the trim deployment area A1 to be deployed. Then, the gas filled into the trim deployment area A1 is supplied into the edge deployment area A2 such that the trim deployment area A1 can be deployed preferentially to the edge deployment area A2.

[0055] Further, in the present application, the edge deployment area A2 deployed at the edge of the rear end of the door 100 can be deployed to be equal to or longer than the vertical length of the edge of the rear end of the door 100.

[0056] In other words, the edge expansion area A2 of the cushion 210 serves to prevent a passenger on the two-wheeled vehicle from directly colliding with the door 100. The edge expansion area A2 is expanded to cover at least an area of the edge of the door 100 completely, so that the passenger on the two-wheeled vehicle is more safely protected.

[0057] Figure 3 is a plan view showing the cushion 210 expanded in the Figure 2

[0058] As shown in the drawing, according to the present application, the edge expansion area A2 expanded at the edge of the rear end of the door 100 can be expanded in the form of extending rearward from the edge of the rear end of the door 100.

[0059] In other words, not only is the edge expansion area A2 expanded such that its vertical length is longer than the length of the edge of the door 100, but also the longitudinal length of the edge expansion area A2 extends over the door rear end edge when the cushion 210 is viewed from the top to protect the passenger of the two-wheeled vehicle.

[0060] As described above, since the rear end of the edge expansion area A2 is formed longer than the rear end of the door 100, when the passenger on the two-wheeled vehicle collides with the door 100, the rearwardly extending portion of the edge expansion area A2 is bent in the direction of collision of the passenger on the two-wheeled vehicle, so that the passenger on the two-wheeled vehicle can be safely prevented from directly colliding with the door 100.

[0061] Figure 4 is a view showing the cushion 210 according to the present application expanded in the case of a side collision. Figure 5 is a front view showing the cushion 210 in Figure 4

[0062] Referring to the drawings, according to the present application, the trim expansion area A1 expanded at the inner surface of the door trim 120 can be expanded at a position corresponding to the lower body including the pelvis of a passenger seated in a seat; and the edge expansion area A2 expanded at the edge of the rear end of the door 100 can be expanded at a position corresponding to the upper body of the passenger in the seat.

[0063] In other words, the cushion 210 of the present application can be configured to be expanded when an object approaching from the side-rear position of the vehicle is detected and the door 100 is opened, but can be configured to be expanded also when the door 100 is closed and a side collision occurs.

[0064] For example, in the case of a side collision of the vehicle, the cushion 210 expanded from the door 100 is expanded between the door and the passenger, so that the trim expansion area A1 is located between the door 100 and the pelvis of the passenger, so that the lower body of the passenger is protected.

[0065] ​​Further, the edge deployment area A2 is deployed between the upper body of the passenger and the B pillar trim to protect the upper body of the passenger. Accordingly, in the case of a side collision, the passenger can be safely protected, and in particular, the cushion 210 protects the upper body of the passenger, thereby replacing the function of the existing side airbag.

[0066] Figure 6 is a view showing a door trim extracted from Figure 1

[0067] Referring to the drawings, the door includes a door panel 110 provided in the door 100 and mounted to the airbag 200, and a door trim 120 fitted to the door 100 in a form of covering the door panel 110, having a matching hole 130 matching an outer portion of the airbag 200 to allow the airbag 200 to be matched with and inserted into the matching hole 130.

[0068] In particular, the airbag 200 is mounted to a lower end of the door panel 110.

[0069] Further, the door trim 120 is fitted in a vehicle interior direction based on the door panel 110.

[0070] In particular, the matching hole 130 is formed at a lower end of the door trim 120 to correspond to an outer shape of the airbag 200 mounted to the door panel 110.

[0071] Further, when the airbag 200 is matched with and inserted into the matching hole 130, the airbag 200 is shaped to be exposed to an outside of the door trim 120, that is, to an interior space of the vehicle cabin via the matching hole 130.

[0072] Accordingly, when the cushion 210 is deployed at the inner surface of the door 100, a passenger opening the door 100 is protected from colliding with a passenger on the two-wheeled vehicle.

[0073] Further, Figure 7 is an exploded view showing the airbag 200 according to the present application.

[0074] Referring to the drawings, the present application is configured such that the cushion 210 is stored in the housing 220 and covered by a cover 230 having a tear line 230a; and the cover 230 is disposed in a direction toward the door trim 120 such that the cushion 210 is deployed in an inward direction of the door 100 by passing through the tear line 230a.

[0075] In particular, the airbag 200 includes the cover 230, the cushion 210, an inflator 240, and the housing 220.

[0076] ​Accordingly, the cushion 210 in the folded state is stored between the cover 230 and the housing 220, and the cover 230 and the housing 220 are coupled to each other, and the housing 220 is mounted to the door panel 110 provided inside the door trim 120, thereby mounting the airbag 200 to the door 100.

[0077] Further, the inflator 240 is connected to a gas injection hole (not shown) of the cushion 210, and the gas generated from the inflator 240 is supplied to the cushion 210.

[0078] Specifically, since the cover 230 is mounted to face the inside space of the door 100 and the tear line 230a is formed in the cover 230, the cushion 210 is deployed toward the inside space of the door 100 (i.e., toward the passenger compartment) while tearing the tear line 230a.

[0079] Further, as shown in Figure 1 , the cover 230 is matched with the inside space of the matching hole 130.

[0080] In other words, the matching hole 130 is formed in the door trim 120, and the outer shape of the airbag 200 is exposed via the matching hole 130 when the door trim 120 is coupled to the door panel 110.

[0081] Specifically, in order to deploy the cushion 210 toward the inside space of the passenger compartment, the cushion 210 should be deployed by tearing the tear line 230a formed in the cover 230. Accordingly, the cover 230 is configured to be fitted such that not only its outside is matched with the matching hole 130, but also the outer surface of the cover 230 exposed outside the door trim 120 is matched with the matching hole 130.

[0082] Figure 8 is a view showing a mounting bracket 250 mounted to the housing 220 of the airbag 200 according to the present application.

[0083] Referring to Figures 6 to 8 , the door panel 110 and the housing 220 are mounted to each other with the mounting bracket 250 as a medium, and the housing 220 is coupled to the mounting bracket 250 with the inflator 240.

[0084] For example, the lower end of the mounting bracket 250 is coupled and fixed at one point or more points of the door panel 110 by hardware such as bolting.

[0085] Then, the upper end of the mounting bracket 250 can be coupled to the housing 220 with studs fixing the inflator 240, or mounted to the housing 220 by welding or the like.

[0086] Further, Figure 9 is a plan view showing the cushion 210 in Figure 1 .

[0087] Referring to the diagram, the cushion 210 can be deployed in a form bent from the edge of the rear end of the door 100 toward the outside space of the door 100.

[0088] In other words, the portion of the deployment of the cushion 210 at the edge of the door 100 serves to prevent the passenger on the two-wheeled vehicle from directly hitting the door 100. The edge deployment area A2 is deployed to cover at least the area of the edge of the door 100 completely, thereby providing safer protection to the passenger on the two-wheeled vehicle.

[0089] Further, Figure 10 is a block diagram illustrating a cushion deployment control system according to the present application.

[0090] Referring to the diagram, the cushion deployment control system includes an outside sensor 300 that detects an object approaching the vehicle from the side rear position of the vehicle, a door sensor 400 that detects the opening state of the door 100, and a controller 500 that determines the appropriate collision probability between the object and the door 100 based on the values calculated by the outside sensor 300 and the door sensor 400 when the door 100 is opened, and controls the cushion 210 so as to deploy the cushion 210 when it is determined that the collision probability is high.

[0091] For example, the outside sensor 300 can be a sensor such as a vehicle-mounted camera or an ultrasonic sensor, and detects an object such as a two-wheeled vehicle approaching from the rear side of the vehicle and transmits its value to the controller 500.

[0092] The door sensor 400 senses whether the door 100 is opened and transmits the opening signal of the door 100 to the controller 500.

[0093] Therefore, in the case where the door 100 is opened, when the collision probability between the two-wheeled vehicle approaching from the side rear position and the door 100 is high, the controller 500 controls the cushion 210 so that the cushion 210 is deployed, and the passenger on the two-wheeled vehicle hits the deployed cushion 210.

[0094] Therefore, the passenger on the two-wheeled vehicle is prevented from directly hitting the door 100 or hitting the passenger inside the vehicle, thereby safely protecting the passenger on the two-wheeled vehicle and the passenger inside the vehicle from the collision accident.

[0095] Further, the controller 500 includes a braking distance calculation part 510 that calculates the minimum braking distance of the object by using the speed of the object approaching the vehicle and the distance from the door 100, a gap angle calculation part 520 that determines whether the door 100 is opened and determines the gap angle, and a deployment signal output part 530 that applies a deployment signal so as to deploy the cushion 210 when the object enters within the minimum braking distance and the gap angle of the door 100 exceeds a predetermined angle.

[0096] In other words, the position and speed of the two-wheeled vehicle are detected using a signal detected by the external sensor 300, and the minimum braking distance of the two-wheeled vehicle is ensured using the detected speed of the two-wheeled vehicle and the distance from the door 100.

[0097] Further, whether the door 100 is opened and the gap angle of the door 100 is ensured using a signal detected by the door sensor 400.

[0098] Then, when the door 100 is opened beyond a predetermined angle, and when the distance between the two-wheeled vehicle and the door 100 enters the minimum braking distance and it is determined that the collision probability is high, the controller applies a deployment signal to the inflator 240 to deploy the cushion 210.

[0099] For reference, according to an exemplary embodiment of the present application, the controller 500 can be implemented by a non-volatile memory (not shown) including data configured to control the operation of various components of the vehicle or software instructions for the algorithm to function as the algorithm, and a processor (not shown) configured to perform the following operations using the data stored in the memory. The memory and the processor can be implemented as independent chips. Alternatively, the memory and the processor can be implemented as an integrated single chip. The processor can have one or more forms.

[0100] Figure 11 is a flowchart showing in its entirety a control method for deploying the cushion 210 according to the present application.

[0101] Referring to the drawing, when the door 100 is opened, the controller 500 determines the collision probability between the object approaching from the side rear position of the vehicle and the door 100, and when it is determined that the collision probability is high, the controller 500 controls the cushion 210 so that the cushion 210 is deployed.

[0102] Specifically, the control method for deploying the cushion 210 with the controller 500 includes calculating a braking distance, which calculates the minimum braking distance of the object by using the speed of the object approaching the vehicle and the distance from the door 100, calculating a gap angle, which calculates whether the door 100 is opened and the gap angle, and outputting a deployment signal, which applies the deployment signal so that the cushion 210 is deployed when the object enters the minimum braking distance and the gap angle of the door 100 exceeds a predetermined angle.

[0103] Further, in referring to Figure 11 In describing the control process of deploying the airbag 200 installed on the door when the two-wheeled vehicle approaches the vehicle from the side rear position, the external sensor 300 installed to the vehicle detects the position and speed of the two-wheeled vehicle at S10.

[0104] Then, at S20, the minimum braking distance of the two-wheeled vehicle is ensured using the detected speed of the two-wheeled vehicle and the detected distance from the door 100.

[0105] Then, whether the door 100 is opened and the gap angle of the door 100 is ensured using the signal detected by the door sensor 400.

[0106] In other words, when the door 100 is opened, whether the gap angle of the door 100 exceeds a° is determined at S30.

[0107] As a result at S30, when the gap angle of the door 100 opened exceeds a predetermined angle, whether the probability of collision between the two-wheeled vehicle and the door 100 is high is determined at S40.

[0108] In other words, when the distance between the two-wheeled vehicle and the door 100 at the moment when the door 100 is opened enters the minimum braking distance, the probability of collision is determined to be high.

[0109] Then, when the probability of collision is high, at S50, a deployment signal is applied to the inflator 240 to deploy the airbag 210.

[0110] As described above, according to the present application, when the two-wheeled vehicle collides with the door 100, the passenger on the two-wheeled vehicle is prevented from directly hitting the door 100 but hits the airbag 210, thereby minimizing the risk of injury of the passenger on the two-wheeled vehicle and the passenger inside the vehicle due to the collision with the door 100, and both the passenger on the two-wheeled vehicle and the passenger inside the vehicle are safely protected.

[0111] Although the preferred embodiments of the present application have been disclosed in detail just as the above specific embodiments, it will be understood by those skilled in the art that various modifications, supplements and replacements are possible without departing from the spirit and scope of the present application, and the various modifications, supplements and replacements belong to the scope of the appended claims.

[0112] Cross Reference to Related Applications

[0113] This application claims the benefit of priority to Korean Patent Application No. 10-2021-0190101, filed December 28, 2021, and Korean Patent Application No. 10-2021-0190102, filed December 28, 2021, the entire contents of which are incorporated herein by reference for all purposes.

Claims

1. A door-mounted airbag, the door-mounted airbag comprising: Safety airbags installed in the door; as well as A buffer pad is disposed in the airbag and configured to unfold in the inward direction of the door, and configured to unfold in a manner covering the inner surface of the door trim and the edge of the rear end of the door, wherein the buffer pad is configured to unfold in a manner bending from the edge of the rear end of the door toward the external space of the door.

2. The airbag installed on the door according to claim 1, wherein, The cushioning pad includes a trim unfolding area unfolding on the inner surface of the door trim and an edge unfolding area unfolding at the edge at the rear end of the door, wherein the trim unfolding area is configured to unfold preferentially over the edge unfolding area.

3. The airbag installed on the door according to claim 1, wherein, The cushioning pad includes an edge extension region that extends at the edge at the rear end of the door, wherein the edge extension region is configured to extend to be equal to or longer than the vertical length of the edge at the rear end of the door.

4. The airbag installed on the door according to claim 1, wherein, The cushioning pad includes an edge-expanded region that unfolds at the edge at the rear end of the door, wherein the edge-expanded region is configured to unfold in a manner that extends rearward from the edge at the rear end of the door.

5. The airbag installed on a door according to claim 1, wherein, The cushioning pad includes a trim unfolding area that unfolds on the inner surface of the door trim, wherein the trim unfolding area is configured to unfold at a position corresponding to the lower body, including the pelvis, of a passenger seated in the seat, and The cushioning pad includes an edge-expanding area that unfolds at the edge at the rear end of the door, wherein the edge-expanding area is configured to unfold at a position corresponding to the upper body of the passenger sitting in the seat.

6. The airbag mounted on a door according to claim 1, wherein the airbag mounted on a door further comprises: The door panel is provided in the door, and the airbag is installed on the door panel; as well as A door trim piece is fitted to the door in the form of covering the door panel, the door trim piece including a matching hole that matches the external shape of the airbag so that the airbag matches the matching hole and is inserted into the matching hole.

7. The airbag installed on a door according to claim 6, wherein, The airbag's cushioning pad is stored within the housing and covered by a cover with tear lines formed therein. The cover is positioned toward the door trim, so the cushioning pad extends inward toward the door through the tear line.

8. The airbag installed on a door according to claim 7, wherein, The cover matches the internal space of the matching hole.

9. The airbag installed on a door according to claim 6, wherein, The door panel and the housing are mounted together using mounting brackets, and The housing and the inflator are connected to the mounting bracket.

10. An airbag mounted on a door, the airbag comprising: Safety airbags installed in the door; A buffer pad is disposed in the airbag and configured to deploy in the inward direction of the door, and is configured to deploy in a manner that covers the inner surface of the door trim and the edge of the rear end of the door. An external sensor configured to detect an object approaching the vehicle from a side or rear position; A door sensor configured to detect the open state of the door; as well as A controller configured such that when the door is opened, the controller determines the probability of a collision between the object and the door based on values ​​detected by the external sensor and the door sensor, and in response to determining that the probability of a collision is high, the controller is configured to control the buffer pad to deploy.

11. The airbag installed on a door according to claim 10, wherein, The controller is configured to: The minimum braking distance of the object is calculated by using the speed of the object approaching the vehicle and its distance from the door; Calculate whether the door is open and calculate the gap angle; as well as In response to the object entering the minimum braking distance and the gap angle of the door exceeding a predetermined angle, an unfolding signal is applied to cause the buffer pad to unfold.

12. A control method for deploying an airbag mounted on a door, The airbag installed on the door includes: Safety airbags installed in the door; as well as A buffer pad, disposed within the airbag and configured to deploy inward in the door, is configured to deploy in a manner covering the inner surface of the door trim and the edge of the rear end of the door. The control method includes the following steps: The controller determines that the door is open; The controller determines the probability of a collision between an object approaching from the side or rear of the vehicle and the door; and In response to determining that the collision probability is high, the controller controls the buffer pad to deploy.

13. The control method according to claim 12, further comprising the following steps: The controller calculates the minimum braking distance of the object by using the speed of the object approaching the vehicle and its distance from the door; The controller calculates whether the door is open and calculates the gap angle; as well as In response to the object entering the minimum braking distance and the gap angle of the door exceeding a predetermined angle, the controller applies an unfolding signal to cause the buffer pad to unfold.

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