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US-12623625-B1 - Curtain airbag device

US12623625B1US 12623625 B1US12623625 B1US 12623625B1US-12623625-B1

Abstract

An embodiment discloses a curtain airbag device including an airbag cushion that includes a cushion main body and a tab strap which wraps around the cushion main body and binds the cushion main body to maintain a folded shape, and a ramp that is mounted on a roof rail of a vehicle through a fastening member and on which the airbag cushion is placed and supported, wherein the fastening member is coupled to a coupling hole formed in the ramp while not connected to the airbag cushion so as to fix the ramp to the roof rail.

Inventors

  • Dong Ho Kang

Assignees

  • HYUNDAI MOBIS CO., LTD.

Dates

Publication Date
20260512
Application Date
20250627
Priority Date
20241114

Claims (9)

  1. 1 . A curtain airbag device comprising: an airbag cushion comprising a cushion main body and a tab strap which wraps around the cushion main body and binds the cushion main body to maintain a folded shape; and a ramp mounted on and fixed to, using a fastening member, a roof rail of a vehicle, wherein the airbag cushion is placed and supported on the ramp, wherein the ramp has a coupling hole, and the fastening member is engaged with the coupling hole to fix the ramp to the roof rail; wherein the tab strap includes a strap portion that wraps around the cushion main body folded in a roll shape and a mounting tab portion that extends through the strap portion and is connected to the ramp; and wherein the mounting tab portion is provided with a coupling ring configured to be fitted onto the ramp at an end portion of the ramp.
  2. 2 . The curtain airbag device of claim 1 , wherein, at an upper end of the cushion main body, the mounting tab portion extends toward a lower end of the cushion main body, and the strap portion extends in a direction opposite to the mounting tab portion.
  3. 3 . The curtain airbag device of claim 1 , wherein: the strap portion has an opening, and the mounting tab portion extends through the opening and is tightened such that the tab strap binds the cushion main body.
  4. 4 . The curtain airbag device of claim 1 , wherein: the ramp includes a support portion on which the airbag cushion is placed and a fixing portion that extends upward from an upper end of the support portion, and the fixing portion extends through the coupling ring and is coupled to the mounting tab portion.
  5. 5 . The curtain airbag device of claim 4 , wherein: the coupling hole extends through the fixing portion, and the coupling hole is disposed above the coupling ring in a state in which the fixing portion is inserted into the coupling ring.
  6. 6 . The curtain airbag device of claim 4 , wherein: the support portion includes a first part connected to the fixing portion and extending vertically, and a second part extending from a lower end of the first part, and the fixing portion is provided on each of opposite edges of the first part.
  7. 7 . The curtain airbag device of claim 4 , wherein the ramp further includes a cover portion disposed on the airbag cushion in a state in which the airbag cushion is placed on the support portion.
  8. 8 . The curtain airbag device of claim 7 , wherein the cover portion extends from the upper end of the support portion and accommodates the airbag cushion between the cover portion and the support portion.
  9. 9 . The curtain airbag device of claim 1 , further comprising a fixing strap that wraps around the ramp and the airbag cushion in a state in which the airbag cushion is disposed in the ramp, wherein the fixing strap is configured to break when the airbag cushion is deployed.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The present application claims priority to and the benefit under 35 USC § 119 of Korean Patent Application No. 10-2024-0161974, filed on Nov. 14, 2024, in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference in its entirety for all purposes. TECHNICAL FIELD The present invention relates to a curtain airbag device, and more specifically, to a curtain airbag device capable of protecting an occupant in the event of a vehicle collision. BACKGROUND Vehicles are equipped with various airbags to protect occupants from collisions. Among these airbags, curtain airbags protect occupants from an impact or fragments generated from a side of a vehicle in the event of a vehicle collision. Such a curtain airbag extends along a roof rail of a vehicle body and is mounted to the roof rail via tabs provided in the curtain airbag. Here, the curtain airbag is installed on a vehicle body side by fastening the tabs to the vehicle body with bolts and washers. However, since the tabs are made of a soft fabric, the tabs sag due to the load of the curtain airbag even when the tabs are bolted to the vehicle body. In addition, when an external force is applied to the tabs, deformation or tearing of the tabs occurs, which causes left-right movement of the curtain airbag, resulting in problems such as reduced assembly efficiency in fixing the curtain airbag to the vehicle body and thus reduced productivity. Meanwhile, a method of bolting a plate-shaped bracket together with a tab as one piece is being introduced, but due to a strong force generated when a cushion is deployed, the tab is pulled and an external force is applied to a bolt, which causes the tab to be torn and separated from the curtain airbag, or the bolt to be separated from the bracket and damage the bracket, causing fragments to fly. Therefore, there is a need to improve this. SUMMARY This Summary is provided to introduce a selection of concepts in simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter. The present invention is directed to a curtain airbag device of which deformation is prevented and assembly efficiency is improved by improving a mounting structure of a curtain airbag. Objects of the present invention are not limited to the object described above, and other objects that are not described will be clearly understood by those skilled in the art from the description below. According to an aspect of the present invention, there is provided a curtain airbag device including an airbag cushion that includes a cushion main body and a tab strap which wraps around the cushion main body and binds the cushion main body to maintain a folded shape, and a ramp that is mounted on a roof rail of a vehicle through a fastening member and on which the airbag cushion is placed and supported, wherein the fastening member is coupled to a coupling hole formed in the ramp while not connected to the airbag cushion so as to fix the ramp to the roof rail. The tab strap may include a strap portion that wraps around the cushion main body folded in a roll shape and a mounting tab portion that extends through the strap portion and is connected to the ramp, and the mounting tab portion may be provided with a coupling ring to be fitted onto the ramp at an end portion thereof. At an upper end of the cushion main body, the mounting tab portion may be disposed to extend toward a lower end of the cushion main body, and the strap portion may be disposed to extend in a direction opposite to the mounting tab portion. The strap portion may have an opening through which the mounting tab portion passes, and the mounting tab portion may pass through the opening and may be tightened such that the tab strap binds the cushion main body. The ramp may include a support portion on which the airbag cushion is placed and a fixing portion that extends upward from an upper end of the support portion, and the fixing portion may be inserted to pass through the coupling ring and coupled to the mounting tab portion. The coupling hole may be formed to pass through the fixing portion, and the coupling hole may be disposed above the coupling ring in a state in which the fixing portion is inserted into the coupling ring. The support portion includes a first part that is continuously connected to the fixing portion and extends vertically, and a second part that extends forward from a lower end of the first part, and the fixing portion may be provided on each of opposite edges of the first part in a longitudinal direction. The ramp may further include a cover portion that is disposed on the airbag cushion in a state in which the airbag cushion is placed on the support portion. The cover portion may extend