Air curtain apparatus and vehicle bumper assembly including same

Abstract

The present invention relates to an air curtain apparatus capable of improving aerodynamics of a vehicle and preventing deterioration in appearance of the vehicle, and a vehicle bumper assembly including the same. In an air curtain apparatus according to one embodiment of the present invention, the air curtain apparatus is provided in a bumper cover provided with an inlet hole into which headwind is introduced, the air curtain apparatus comprises: a flap assembly provided in the inlet hole to open and close the inlet hole; and an actuator coupled to the flap assembly to operate the flap assembly, where the flap assembly includes a plurality of flaps disposed collinear with the bumper cover to close the inlet aperture and to rotate in a stepped manner to open the inlet aperture.

Description

Technical Field

[0001] The invention relates to an air curtain device and a vehicle bumper assembly comprising the air curtain device. Background Art

[0002] The air curtain device is a device that can improve the aerodynamics of the vehicle. The air curtain device can be provided in a bumper arranged at the front of the vehicle, and can guide the headwind generated when the vehicle is running toward the wheels.

[0003] Such an air curtain apparatus may include a flap for covering an inlet hole formed in a bumper, an actuator for generating power to rotate the flap, and a link for connecting the flap and the actuator and pushing or pulling the flap using power generated by the actuator.

[0004] Conventional air curtains keep the inlet holes open by flaps so that air can flow to the inside of the bumper at any time. However, compared with when the inlet holes are always open, aerodynamics are more improved when the inlet holes are opened or closed according to the situation.

[0005] In addition, there is a large change in shape exposed to the outside between a state in which the flap rotates to always open the inlet hole and a state in which the inlet hole is closed by the flap, and this may be a factor that reduces the aesthetics of the vehicle. Summary of the invention

[0006] The present invention aims to provide an air curtain device and a vehicle bumper assembly including the air curtain device, which can improve the aerodynamics of a vehicle and prevent the aesthetics of the vehicle from being deteriorated.

[0007] According to one aspect of the present invention, an air curtain device is provided, which is arranged in a bumper cover, the bumper cover is provided with an inlet hole for introducing headwind, and the air curtain device includes: a flap assembly, the flap assembly is arranged in the inlet hole to open and close the inlet hole; and an actuator, the actuator is connected to the flap assembly to operate the flap assembly, wherein the flap assembly includes a plurality of flaps, the plurality of flaps are arranged to be colinear with the bumper cover to close the inlet hole and rotate in a step-by-step manner to open the inlet hole.

[0008] The plurality of flaps may include a first flap, a second flap, and a third flap disposed in the inlet hole in a height direction, and the first flap, the second flap, and the third flap may have the same rotation center.

[0009] The first flap may include a first axial protrusion and a first connecting protrusion arranged to be spaced apart from the first axial protrusion, the second flap may include a second axial protrusion and a second connecting protrusion arranged to be spaced apart from the second axial protrusion, the third flap may include a third axial protrusion and a third connecting protrusion arranged to be spaced apart from the third axial protrusion, and when viewed in the height direction, the first axial protrusion, the second axial protrusion and the third axial protrusion may be arranged in a straight line collinear with each other.

[0010] A first distance from the first axial protrusion to the first connecting protrusion may be smaller than a second distance from the second axial protrusion to the second connecting protrusion, and the second distance may be smaller than a third distance from the third axial protrusion to the third connecting protrusion.

[0011] The flap assembly may include a link unit which transmits power generated by the actuator to the plurality of flaps.

[0012] The link unit may include a central link connected to the actuator and rotated by power generated by the actuator, and the central link may include a first link groove, a second link groove, and a third link groove provided in plurality in the height direction.

[0013] The connecting rod unit may include: a first connecting rod, which is connected to the first connecting rod groove and the first connecting protrusion of the first flap, and pushes or pulls the first flap in coordination with the rotation of the center connecting rod; a second connecting rod, which is connected to the second connecting rod groove and the second connecting protrusion of the second flap, and pushes or pulls the second flap in coordination with the rotation of the center connecting rod; and a third connecting rod, which is connected to the third connecting rod groove and the third connecting protrusion of the third flap, and pushes or pulls the third flap in coordination with the rotation of the center connecting rod.

[0014] The air curtain apparatus may include a cover housing disposed inside the bumper cover and rotatably supporting the first, second, and third axial protrusions.

[0015] According to one aspect of the present invention, a vehicle bumper assembly is provided, which includes: a bumper cover, which is provided with an inlet hole for introducing headwind; and an air curtain device, which is arranged in the bumper cover, wherein the air curtain device includes a flap assembly and an actuator, the flap assembly is arranged in the inlet hole to open and close the inlet hole, the actuator is connected to the flap assembly to operate the flap assembly, and the flap assembly includes a plurality of flaps, which are arranged in line with the bumper cover to close the inlet hole and rotate in a step-by-step manner to open the inlet hole.

[0016] The plurality of flaps may include a first flap, a second flap, and a third flap disposed in the inlet hole in a height direction, and the first flap, the second flap, and the third flap may have the same rotation center. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present invention will become more apparent to those skilled in the art by describing in detail exemplary embodiments of the present invention with reference to the accompanying drawings, in which:

[0018] Figure 1 is a front perspective view of a vehicle bumper assembly according to one embodiment of the present invention;

[0019] Figure 2 is a rear perspective view of a vehicle bumper assembly according to one embodiment of the present invention;

[0020] Figure 3 is an exploded perspective view of a vehicle bumper assembly according to one embodiment of the present invention;

[0021] Figure 4 is a diagram showing a state in which a first flap, a second flap, and a third flap are coupled to a housing;

[0022] Figure 5 is a rear view of the first flap, the second flap, and the third flap;

[0023] Figure 6 is a diagram showing that a first flap, a second flap, and a third flap are connected to a center link through a first connecting link, a second connecting link, and a third connecting link;

[0024] Figure 7 is a plan view showing the rotating first flap, second flap, and third flap; and

[0025] Figure 8 is a front perspective view showing the rotating first flap, second flap, and third flap. DETAILED DESCRIPTION

[0026] Since the present invention can be modified in various ways and has many embodiments, specific embodiments will be shown and described in the accompanying drawings. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that all changes, equivalents and substitutes falling within the spirit and technical scope of the present invention are included in the present invention.

[0027] Although terms such as "first" and "second" may be used to describe various components, such components are not limited by these terms. These terms are only used to distinguish one component from another component. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component without departing from the scope of the present invention. The term "and / or" includes any one or combination of the associated listed items.

[0028] When a first element is referred to as being "connected" or "coupled" to a second element, it will be understood that the first element can be directly connected or coupled to the second element, or a third element can exist between them. Conversely, when an element is referred to as being "directly connected" or "directly coupled" to another element, it will be understood that there are no intermediate elements.

[0029] In the description of the embodiments, when any one element is described as being formed on or under another element, such description includes a case where the two elements are formed in direct contact with each other and a case where the two elements are in indirect contact with each other with one or more other elements interposed between the two elements. In addition, when one element is described as being formed on or under another element, such description may include a case where one element is formed at the upper side or the lower side relative to the other element.

[0030] The terms used herein are only used for the purpose of describing specific embodiments and are not intended to limit the present invention. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In this specification, it should also be understood that the terms "include" and / or "comprise" used herein specify the presence of the features, quantities, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, quantities, steps, operations, elements, parts and / or their groups.

[0031] Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meanings as those generally understood by those skilled in the art. Terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and will not be interpreted as an idealized or overly formal meaning unless explicitly defined as such herein.

[0032] Hereinafter, when an air curtain apparatus and a vehicle bumper assembly including the same are described in detail with reference to the accompanying drawings, the same or mutually corresponding components will be denoted by the same or corresponding reference numerals in all the drawings, and redundant description will be omitted.

[0033] Figure 1 is a front perspective view of a vehicle bumper assembly according to one embodiment of the present invention, and Figure 2 is a rear perspective view of a vehicle bumper assembly according to one embodiment of the present invention. Figure 3 is an exploded perspective view of a vehicle bumper assembly according to one embodiment of the present invention, and Figure 4 is a diagram showing a state in which the first flap, the second flap, and the third flap are coupled to the housing. Figure 5 is a rear view of the first flap, the second flap, and the third flap, and Figure 6 is a diagram showing that the first flap, the second flap, and the third flap are connected to the center link through the first connecting link, the second connecting link, and the third connecting link. Figure 7 is a plan view showing the rotating first flap, second flap and third flap, and Figure 8 is a front perspective view showing the rotating first flap, second flap, and third flap.

[0034] Reference Figures 1 to 8 , a vehicle bumper assembly 1 according to one embodiment of the present invention includes a bumper cover 1000 and an air curtain apparatus 2000 provided on the bumper cover 1000 , in which an inlet hole 1000 a through which adverse wind is introduced is formed.

[0035] The bumper cover 1000 may be disposed on the front of the vehicle in a longitudinal direction to protect components in an engine room, and has a rounded corner. In this case, the longitudinal direction may be a direction from a passenger compartment (not shown) toward an engine compartment (not shown) of the vehicle or the opposite direction.

[0036] The bumper cover 1000 may include an inlet hole 1000a. The inlet hole 1000a may be provided on each of the two sides of the bumper cover 1000 in the width direction. In this case, the width direction may be a direction intersecting the longitudinal direction. The inlet hole 1000a is a hole through which the headwind passes when the vehicle is traveling, and the headwind flowing toward the wheel through the inlet hole 1000a may improve aerodynamics. In the present embodiment, only the portion of the bumper cover 1000 formed with the inlet hole 1000a will be shown.

[0037] The air curtain apparatus 2000 includes a flap assembly 2100 disposed in the inlet hole 1000 a to open or close the inlet hole 1000 a and an actuator 2200 coupled to the flap assembly 2100 to operate the flap assembly 2100 .

[0038] The flap assembly 2100 may include a plurality of flaps, a link unit 2140 , a pin 2150 , and a cover housing 2160 .

[0039] A plurality of flaps can be arranged in line with the bumper cover 1000 to close the inlet hole 1000a, and rotate in a stepped manner to open the inlet hole 1000a. In addition, a plurality of flaps can be arranged in the inlet hole 1000a continuously so that the opening size of the inlet hole 1000a is different. A plurality of flaps can include the first flap 2110, the second flap 2120 and the third flap 2130. The first flap 2110, the second flap 2120 and the third flap 2130 can be arranged in the inlet hole 1000a in the height direction. In this case, the height direction can be a direction perpendicularly intersecting with the longitudinal direction and the width direction.

[0040] The first flap 2110 may be disposed in the upper end of the inlet hole 1000a. The first flap 2110 may be a main flap that interferes with headwind to the greatest extent. The first flap 2110 may include a first flap body 2112, a first axial protrusion 2114, and a first connection protrusion 2116.

[0041] The first flap body 2112 may form the outer portion of the first flap 2110. The first flap body 2112 may have the largest coverage area in the inlet hole 1000a among the plurality of flaps, but is not limited thereto.

[0042] The first axial projection 2114 may be arranged on the inner surface of the first flap body 2112. In this case, the inner surface may be a non-exposed surface that is not exposed to the vehicle exterior. The first axial projection 2114 may be arranged on a side of the first flap body 2112 in the width direction. A hole for accommodating a pin 2150 may be formed in the first axial projection 2114, and the pin 2150 may be accommodated in the hole so that the first axial projection 2114 is coupled to the housing. The hole formed in the first axial projection 2114 may be the rotation center of the first flap 2110.

[0043] The first connecting protrusion 2116 may be arranged on the inner surface of the first flap body 2112. A plurality of first connecting protrusions 2116 may be arranged on the inner surface of the first flap body 2112 in the height direction. The first connecting protrusion 2116 may be arranged on the other side opposite to one side of the first flap body 2112 in the width direction. The first connecting protrusion 2116 may be arranged to be spaced apart from the first axial protrusion 2114 in the width direction. The first connecting protrusion 2116 may be connected to the first connecting link 2144 to be described below.

[0044] The second flap 2120 can be arranged in the lower end of the inlet hole 1000a in the height direction. In addition, the second flap 2120 can be arranged below the first flap 2110 in the height direction. The second flap 2120 can be a sub-flap. The second flap 2120 can include a second flap body 2122, a second axial protrusion 2124 and a second connecting protrusion 2126.

[0045] The second flap body 2122 may form the outer portion of the second flap 2120. The second flap body 2122 may have a rectangular shape in which a length in a width direction is greater than a length in a height direction.

[0046] The second axial protrusion 2124 may be provided on the inner surface of the second flap body 2122. The second axial protrusion 2124 may be provided on one side of the second flap body 2122 in the width direction. A hole for accommodating a pin 2150 may be formed in the second axial protrusion 2124, and the pin 2150 may be accommodated in the hole so that the second axial protrusion 2124 is coupled to the housing. The hole formed in the second axial protrusion 2124 may be the rotation center of the second flap 2120.

[0047] The second connecting protrusion 2126 may be arranged on the inner surface of the second flap body 2122. A plurality of second connecting protrusions 2126 may be arranged on the inner surface of the second flap body 2122 in the height direction. The second connecting protrusion 2126 may be arranged on the other side opposite to one side of the second flap body 2122 in the width direction. The second connecting protrusion 2126 may be arranged to be spaced apart from the second axial protrusion 2124 in the width direction. The second connecting protrusion 2126 may be connected to the second connecting link 2146 to be described below.

[0048] The third flap 2130 can be arranged in the lower end of the inlet hole 1000a in the height direction. In addition, the third flap 2130 can be arranged below the second flap 2120 in the height direction. The third flap 2130 can be a sub-flap. The third flap 2130 can include a third flap body 2132, a third axial protrusion 2134 and a third connecting protrusion 2136.

[0049] The third flap body 2132 may form the outer portion of the third flap 2130. The third flap body 2132 may have a rectangular shape in which a length in a width direction is greater than a length in a height direction.

[0050] The third axial projection 2134 may be provided on the inner surface of the third flap body 2132. The third axial projection 2134 may be provided on one side of the third flap body 2132 in the width direction. A hole for accommodating a pin 2150 may be formed in the third axial projection 2134, and the pin 2150 may be accommodated in the hole so that the third axial projection 2134 is coupled to the housing. The hole formed in the third axial projection 2134 may be the rotation center of the third flap 2130.

[0051] The third connecting protrusion 2136 can be arranged on the inner surface of the third flap body 2132. A plurality of the third connecting protrusions 2136 can be arranged on the inner surface of the third flap body 2132 in the height direction. The third connecting protrusion 2136 can be arranged on the other side opposite to one side of the third flap body 2132 in the width direction. The third connecting protrusion 2136 can be arranged to be spaced apart from the third axial protrusion 2134 in the width direction. The third connecting protrusion 2136 can be connected to the third connecting link 2148 to be described below.

[0052] like Figure 6 As shown, the first axial protrusion 2114, the second axial protrusion 2124 and the third axial protrusion 2134 can be arranged in a straight line collinearly with each other. More specifically, the first axial protrusion 2114, the second axial protrusion 2124 and the third axial protrusion 2134 can be connected to each other in a straight line collinearly with the pin 2150. Therefore, since the connection using the pin 2150 can be easy, the need to connect the pin 2150 with force to connect the flap is reduced, and therefore the manufacturing time and rotation failure problem of each flap can be reduced.

[0053] In addition, since the first axial protrusion 2114, the second axial protrusion 2124 and the third axial protrusion 2134 are arranged colinearly with each other, the first flap 2110, the second flap 2120 and the third flap 2130 have the same rotation center. Therefore, since the first axial protrusion 2114, the second axial protrusion 2124 and the third axial protrusion 2134 rotate simultaneously by the rotation of the pin 2150, it can be indicated that the power of the actuator 2200 for each flap is not required. Therefore, since the three flaps are operated by one actuator 2200, the cost for providing the additional actuator 2200 can be reduced.

[0054] The link unit 2140 may transmit power generated by the actuator 2200 to the plurality of flaps. The link unit 2140 may include a central link 2142, a first connecting link 2144, a second connecting link 2146, and a third connecting link 2148.

[0055] The central link 2142 may be connected to the actuator 2200 and rotated by power generated by the actuator 2200. The central link 2142 may include a first link body 2142a, a first link groove 2142b, a second link groove 2142c, and a third link groove 2142d.

[0056] The first link body 2142a may form the outside of the central link 2142. The first link body 2142a may have a rectangular hexahedron shape in which both ends in the width direction are rounded. The height of the first link body 2142a may be greater than the sum of the heights of the first connecting link 2144, the second connecting link 2146, and the third connecting link 2148 in the height direction.

[0057] The first connecting rod groove 2142b, the second connecting rod groove 2142c and the third connecting rod groove 2142d can be set in a plurality in the first connecting rod body 2142a along the height direction. In addition, in the height direction, the first connecting rod groove 2142b can be set above the second connecting rod groove 2142c, and the second connecting rod groove 2142c can be set above the third connecting rod groove 2142d. In addition, the first connecting rod groove 2142b, the second connecting rod groove 2142c and the third connecting rod groove 2142d can be set to be spaced apart from each other in the height direction. The first connecting rod groove 2142b can accommodate one end of the first connecting rod 2144, the second connecting rod groove 2142c can accommodate one end of the second connecting rod 2146, and the third connecting rod groove 2142d can accommodate one end of the third connecting rod 2148.

[0058] Meanwhile, a connection hole 2142e may be formed in the first link body 2142a. The connection hole 2142e may be provided at a position where the connection hole 2142e passes through the link groove in the height direction of the center link 2142. The connection hole 2142e may accommodate the pin 2150, and the pin 2150 passing through the connection hole 2142e may be supported by the first link body 2142a of the center link 2142. The connection hole 2142e may be a rotation center of the first connection link 2144, the second connection link 2146, and the third connection link 2148.

[0059] The first connecting link 2144 can have a rectangular hexahedron shape with rounded corners. The first connecting link 2144 can be connected to the first connecting rod groove 2142b of the center link 2142 and the first connecting protrusion 2116 of the first flap 2110. Therefore, the first connecting link 2144 can connect the first flap 2110 and the center link 2142. The first connecting link 2144 can push or pull the first flap 2110 in coordination with the rotation of the center link 2142. More specifically, when the center link 2142 is rotated by the power generated by the actuator 2200, the first connecting link 2144 can transfer thrust or pulling force to the first flap body 2112 of the first flap 2110 while rotating with the center link 2142.

[0060] The second connecting link 2146 can have a rectangular hexahedron shape with rounded corners. The second connecting link 2146 can be connected to the second connecting rod groove 2142c of the center link 2142 and the second connecting protrusion 2126 of the second flap 2120. Therefore, the second connecting link 2146 can connect the second flap 2120 and the center link 2142. The second connecting link 2146 can push or pull the second flap 2120 in coordination with the rotation of the center link 2142. More specifically, when the center link 2142 is rotated by the power generated by the actuator 2200, the second connecting link 2146 can transfer thrust or pulling force to the second flap body 2122 of the second flap 2120 while rotating with the center link 2142.

[0061] The third connecting link 2148 can have a rectangular hexahedron shape with rounded corners. The third connecting link 2148 can be connected to the third connecting rod groove 2142d of the center link 2142 and the third connecting protrusion 2136 of the second flap 2120. Therefore, the third connecting link 2148 can connect the third flap 2130 and the center link 2142. The third connecting link 2148 can push or pull the third flap 2130 in coordination with the rotation of the center link 2142. More specifically, when the center link 2142 is rotated by the power generated by the actuator 2200, the third connecting link 2148 can transfer thrust or pulling force to the third flap body 2132 of the third flap 2130 while rotating with the center link 2142.

[0062] like Figure 5 and Figure 6As shown, the first distance D1 from the first axial protrusion 2114 to the first connecting protrusion 2116 may be smaller than the second distance D2 from the second axial protrusion 2124 to the second connecting protrusion 2126, and the second distance D2 may be smaller than the third distance D3 from the third axial protrusion 2134 to the third connecting protrusion 2136. Therefore, the first connecting protrusion 2116 of the first flap 2110 may be disposed closer to the central link 2142 than the other connecting protrusions.

[0063] Therefore, the angle formed between the center link 2142 and the first connecting link 2144 can be smaller than the angle formed between the center link 2142 and the second connecting link 2146 and the angle formed between the center link 2142 and the third connecting link 2148. Therefore, since the rotation distance of the first connecting link 2144 to the position where the first connecting link 2144 and the center link 2142 are operated in coordination so that the first connecting link 2144 and the center link 2142 are straightly collinear is the largest, the first flap 2110 can rotate more than the second flap 2120 and the third flap 2130. Therefore, the first flap 2110 as the main flap can open the inlet hole 1000a of the bumper cover 1000 to the maximum extent, so that the maximum amount of headwind flows into the interior of the bumper cover 1000.

[0064] In addition, the first flap 2110 can rotate more than the second flap 2120, and the second flap 2120 can rotate more than the third flap 2130. That is, when viewed in the height direction, a shape in which a plurality of flaps rotate in a stepped manner relative to each other can be achieved. Therefore, when the air curtain device 2000 is operated, the design visibility of the vehicle can be maintained without being damaged.

[0065] The pin 2150 may be a combination of a head having a circular cross section and a body coupled to the head. A plurality of pins 2150 may be provided. One of the plurality of pins 2150 may pass through the connecting hole 2142e of the center link 2142 to connect the center link 2142, the first flap 2110, the second flap 2120, and the third flap 2130, and another of the plurality of pins 2150 may connect the cover housing 2160, the first flap 2110, the second flap 2120, and the third flap 2130.

[0066] The cover housing 2160 may be disposed inside the bumper cover 1000. The cover housing 2160 may rotatably support the first axial protrusion 2114 of the first flap 2110, the second axial protrusion 2124 of the second flap 2120, and the third axial protrusion 2134 of the third flap 2130. The cover housing 2160 may include a housing body 2162 and a support protrusion 2164.

[0067] The housing body 2162 may form the exterior of the cover housing 2160. The housing body 2162 may be fixed to the bumper cover 1000 using a coupling member such as a bolt. The housing body 2162 and the bumper cover 1000 may form a space for accommodating a plurality of flaps and the link unit 2140.

[0068] The support protrusion 2164 may protrude from the housing body 2162. The support protrusion 2164 may be coupled to the first axial protrusion 2114 of the first flap 2110, the second axial protrusion 2124 of the second flap 2120, and the third axial protrusion 2134 of the third flap 2130 to rotatably support the first axial protrusion 2114, the second axial protrusion 2124, and the third axial protrusion 2134.

[0069] The actuator 2200 may be connected to the central link 2142. The actuator 2200 may be connected to an external power supply device and may generate power using the power transmitted to the power supply device. The central link 2142 may be rotated by the power generated by the actuator 2200. In the present embodiment, an example in which the actuator 2200 is disposed above the central link is shown, but the present invention is not limited thereto.

[0070] As described above, in the vehicle bumper assembly 1 according to one embodiment of the present invention, since the air curtain apparatus 2000 can control the inflow amount of adverse wind and also satisfy the design visibility of the user, the consumer satisfaction can be improved.

[0071] According to one embodiment of the present invention, since the inlet hole can be opened in a stepped manner by a plurality of flaps, the aerodynamics of the vehicle can be improved and the design visibility of the vehicle can be satisfied.

[0072] Although the present invention has been described above with reference to exemplary embodiments, it will be appreciated by those skilled in the art that various modifications and changes of the present invention can be made within the scope of the spirit and scope of the present invention as defined by the appended claims. In addition, it should be understood that the differences associated with modifications and changes fall within the scope of the present invention as defined by the appended claims.

[0073] CROSS-REFERENCE TO RELATED APPLICATIONS

[0074] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0128090, filed on September 25, 2023, the disclosure of which is incorporated herein by reference in its entirety.

Claims

1. An air curtain device, the air curtain device is arranged in a bumper cover, the bumper cover is provided with an inlet hole for introducing adverse wind, the air curtain device comprising: a flap assembly disposed in the inlet hole to open and close the inlet hole; as well as an actuator coupled to the flap assembly to operate the flap assembly, Wherein, the flap assembly includes a plurality of flaps, and the plurality of flaps are arranged in line with the bumper cover to close the inlet hole and rotate in a step-wise manner to open the inlet hole.

2. The air curtain device according to claim 1, wherein: The plurality of flaps include a first flap, a second flap, and a third flap, the first flap, the second flap, and the third flap being disposed in the inlet hole in a height direction of the bumper cover; and The first flap, the second flap, and the third flap have the same rotation center.

3. The air curtain device according to claim 2, wherein: The first flap includes a first axial protrusion and a first connecting protrusion arranged to be spaced apart from the first axial protrusion; The second flap includes a second axial protrusion and a second connecting protrusion disposed to be spaced apart from the second axial protrusion; The third flap includes a third axial protrusion and a third connecting protrusion disposed to be spaced apart from the third axial protrusion; and The first axial protrusion, the second axial protrusion, and the third axial protrusion are disposed linearly collinearly with each other in the height direction of the bumper cover.

4. The air curtain device according to claim 3, wherein: A first distance from the first axial protrusion to the first connecting protrusion is smaller than a second distance from the second axial protrusion to the second connecting protrusion; and The second distance is smaller than a third distance from the third axial protrusion to the third connecting protrusion.

5. The air curtain device according to claim 3, wherein: The flap assembly includes a link unit that transmits power generated by the actuator to the plurality of flaps.

6. The air curtain device according to claim 5, wherein: The link unit includes a central link connected to the actuator and rotated by power generated by the actuator; and The central link includes a first link groove, a second link groove, and a third link groove which are arranged in plurality in the height direction.

7. The air curtain device according to claim 6, wherein: The connecting rod unit comprises: a first connecting link connected to the first link groove and the first connecting protrusion of the first flap, and the first connecting link pushes or pulls the first flap in cooperation with the rotation of the center link; a second connecting link connected to the second link groove and the second connecting protrusion of the second flap, and the second connecting link pushes or pulls the second flap in cooperation with the rotation of the center link; and A third connecting link is connected to the third connecting link groove and the third connecting protrusion of the third flap, and the third connecting link pushes or pulls the third flap in cooperation with the rotation of the center link. 8 . The air curtain apparatus according to claim 3 , comprising a cover housing disposed inside the bumper cover and rotatably supporting the first axial protrusion, the second axial protrusion, and the third axial protrusion.

9. A vehicle bumper assembly, comprising: a bumper cover, the bumper cover being provided with an inlet hole for introducing headwind; as well as an air curtain device, the air curtain device being arranged in the bumper cover, wherein the air curtain device comprises a flap assembly and an actuator, the flap assembly being disposed in the inlet hole to open and close the inlet hole, the actuator being coupled to the flap assembly to operate the flap assembly, and The flap assembly includes a plurality of flaps disposed in line with the bumper cover to close the inlet hole and rotated in a stepwise manner to open the inlet hole.

10. The vehicle bumper assembly according to claim 9, wherein: The plurality of flaps include a first flap, a second flap, and a third flap, the first flap, the second flap, and the third flap being disposed in the inlet hole in a height direction of the bumper cover; and The first flap, the second flap, and the third flap have the same rotation center.

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