KR20240043331A - air bag device for vehicle - Google Patents

Abstract

Disclosed is an airbag device for vehicles.
A vehicle airbag device according to an embodiment includes: a roof airbag device mounted on the roof of a vehicle body and having a roof cushion that protrudes toward the lower vehicle compartment when deployed; a guide rail provided on a side part of the vehicle body and provided along a direction in which the roof cushion protrudes when deployed; And it may include a connection part that slidably connects the roof cushion to the guide rail so that the roof cushion is deployed and supported along the guide rail.

Description

Air bag device for vehicle

The disclosed invention relates to an airbag device for vehicles.

In general, vehicles are equipped with various types of airbag devices to protect occupants from accidents such as collisions and rollovers.

Among the airbag devices, there is a roof airbag device that is mounted on the roof of the vehicle, and among the roof airbag devices, there is a roof cushion that extends to protrude from the roof toward the lower vehicle compartment.

When deployed, the roof cushion that protrudes from the roof toward the lower cabin is positioned in front of the passengers and can support and protect the passengers who move forward due to the impact of a vehicle accident.

However, the roof cushion that protrudes from the roof into the cabin has poor support on its own and can easily be pushed forward by the weight of passengers moving forward due to the impact of an accident, making it difficult to properly protect passengers. It can be difficult.

In addition, since the position of a normal airbag device is fixed, if the seat position is moved to increase the distance between the passenger and the airbag device, there is a risk that the effect of protecting the passenger using the cushion deployed in front of the passenger will be reduced. It was big.

One aspect of the disclosed invention seeks to provide an airbag device for a vehicle that can effectively increase the support force of a roof cushion that is deployed to protrude from the roof toward a lower vehicle compartment.

One aspect of the disclosed invention seeks to provide an airbag device for a vehicle that can effectively increase the support force of a cushion deployed to protrude into the interior of a vehicle.

One aspect of the disclosed invention seeks to provide an airbag device for a vehicle in which the deployment position of a cushion that protrudes and deploys to be positioned in front of the passenger can be varied depending on the position of the passenger.

A vehicle airbag device according to one aspect of the disclosed invention includes a roof airbag device mounted on the roof of a vehicle body and having a roof cushion that protrudes toward the lower vehicle compartment when deployed; a guide rail provided on a side part of the vehicle body and provided along a direction in which the roof cushion protrudes when deployed; And it may include a connection part that slidably connects the roof cushion to the guide rail so that the roof cushion is deployed and supported along the guide rail.

The connection part includes a slider slidably coupled to the guide rail; And it may include a tether, one end of which is coupled to the loop cushion, and the other end of which is coupled to the slider.

The guide rail includes a guide slit that guides the sliding of the slider along the development direction of the roof cushion; and a locking protrusion provided to catch the slider in order to limit sliding of the slider in a state before the loop cushion is deployed, wherein the locking protrusion is applied to the slider through the connection portion when the loop cushion is deployed. The holding force on the slider may be lost due to the pressure of the roof cushion being deployed.

The roof airbag device is mounted along the width direction of the vehicle between a pair of side portions of the vehicle body on which the guide rails are respectively installed, and the connection portion is provided in pairs to connect both sides of the roof cushion in the width direction of the vehicle. Each of the pairs of guide rails can be connected to each other.

The roof airbag device further includes a housing that accommodates the roof cushion in a compressed state before being deployed, and the connection unit may connect a lower side portion of the roof cushion to the guide rail.

The side portion of the vehicle body includes a center pillar portion, a pillar trim is coupled to the center pillar portion to cover the guide rail, and when the roof cushion is deployed, at least a portion of the pillar trim is aligned with the center pillar so that the guide rail is exposed. It may further include a separation unit that separates the filler portion.

The filler trim and the center pillar part are coupled through a coupling part, and the separation unit can release the coupling between the filler trim and the center pillar part by the coupling part.

The pillar trim is provided in a split manner having a plurality of parts that are mutually divided, including a first part that covers the guide rail, and the separation unit separates the first part excluding the remaining parts from the center pillar part. can be separated.

It further includes a first inflator that supplies airbag gas to deploy the roof cushion, wherein the separation unit is provided to be inflatable between the filler trim and the center pillar portion, and when inflated, at least a portion of the filler trim is inflated to the center. An expansion cushion separated from the filler portion; It may include a second inflator that supplies airbag gas to inflate the inflation cushion.

It further includes a front collision detection sensor that detects a front collision of the vehicle, and when a front collision signal is detected through the front collision detection sensor, the first inflator and the second inflator expand the inflation cushion to inflate the roof. The cushions can be simultaneously driven to unfold.

The separation unit may further include a guide member that guides the expansion direction of the inflation cushion in a direction to spread the gap between the pillar trim and the center pillar part.

The roof airbag device includes a housing that accommodates the roof cushion in a compressed state before being deployed; And it may further include a moving unit that moves the position of the housing along the longitudinal direction of the vehicle.

The mobile unit includes a screw shaft installed in the longitudinal direction of the vehicle and coupled to the housing in a screw manner; a motor that rotates the screw shaft in both directions; And it may include a guide member that supports the housing to be slidable in the longitudinal direction of the vehicle in a restricted rotation state.

The connection part includes a slider slidably coupled to the guide rail; and a tether, one end of which penetrates the housing and coupled to the roof cushion, and the other end of which is coupled to the slider. The tether may allow the housing to be moved by the moving unit.

The roof cushion is deployed between the front seat and the rear seat provided inside the vehicle compartment, and further includes a seat position detection sensor that detects the positions of the front seat and the rear seat in the longitudinal direction of the vehicle, and the moving unit is configured to detect the position of the front seat and the rear seat. When a position movement signal of the seat is detected through the position sensor, the housing can be moved to a position maintaining the same distance from the front seat and the rear seat.

An airbag device for a vehicle according to one aspect of the disclosed invention includes an air cushion that protrudes from the vehicle body to be deployed inside the vehicle compartment; A guide rail provided along a protruding direction when the air cushion is deployed on the vehicle body on at least one side of the position where the air cushion is deployed; And it may include a connection part that slidably connects the air cushion to the guide rail so that the air cushion is deployed and supported along the guide rail.

According to one aspect of the disclosed invention, an airbag device for a vehicle can be provided that can effectively increase the support force of a roof cushion that is deployed to protrude from the roof toward a lower vehicle compartment.

According to one aspect of the disclosed invention, an airbag device for a vehicle can be provided that can effectively increase the support force of a cushion deployed to protrude into a vehicle interior.

According to one aspect of the disclosed invention, an airbag device for a vehicle can be provided in which the deployment position of a cushion that protrudes and deploys to be positioned in front of the passenger can be varied depending on the position of the passenger.

Figure 1 shows a state in which a vehicle airbag device according to an embodiment of the disclosed invention is installed on a vehicle body.
Figure 2 is an enlarged view of the structure of the guide rail and the connection part in the vehicle airbag device according to an embodiment of the disclosed invention.
Figure 3 shows a state in which a guide rail is obscured by a pillar trim coupled to a center pillar part of a car body in an airbag device for a vehicle according to an embodiment of the disclosed invention.
Figure 4 shows the cross-sectional structure of Figure 3 together with the structure of the back side of the filler trim.
Figure 5 shows a state in which the first part of the filler trim is separated in the state of Figure 4.
Figure 6 is a front view of a vehicle to which a vehicle airbag device according to an embodiment of the disclosed invention is applied, showing the roof cushion in a deployed state.
Figure 7 shows a state in which a moving unit is added to the vehicle airbag device according to an embodiment of the disclosed invention.
Figure 8 is an exploded view of the configuration of the mobile unit shown in Figure 7.
FIG. 9 is a plan view showing an operation in which the position of the housing is moved through a moving unit in the vehicle airbag device shown in FIG. 7.
FIG. 10 is a side view showing an operation in which the position of the housing is moved through a moving unit in the vehicle airbag device shown in FIG. 7.
Figure 11 is a front view of a vehicle to which a vehicle airbag device according to a modified example of the disclosed invention is applied, showing the roof cushion in a deployed state.
Figure 12 is a front view of a vehicle to which a vehicle airbag device according to another modification of the disclosed invention is applied, showing the roof cushion in a deployed state.

Like reference numerals refer to like elements throughout the specification. This specification does not describe all elements of the embodiments, and general content or overlapping content between the embodiments in the technical field to which the present invention pertains is omitted. The term 'part, module, member, block' used in the specification may be implemented as software or hardware, and depending on the embodiment, a plurality of 'part, module, member, block' may be implemented as a single component, or It is also possible for one 'part, module, member, or block' to include multiple components.

Throughout the specification, when a part is said to be “connected” to another part, this includes not only direct connection but also indirect connection, and indirect connection includes connection through a wireless communication network. do.

Additionally, when a part is said to “include” a certain component, this means that it may further include other components, rather than excluding other components, unless specifically stated to the contrary.

Throughout the specification, when a member is said to be located “on” another member, this includes not only the case where a member is in contact with another member, but also the case where another member exists between the two members.

Terms such as first and second are used to distinguish one component from another component, and the components are not limited by the above-mentioned terms.

Singular expressions include plural expressions unless the context clearly makes an exception.

The identification codes for each step are used for convenience of explanation. The identification codes do not explain the order of each step, and each step may be performed differently from the specified order unless the specific sequences are clearly stated in the context. there is.

Hereinafter, the operating principle and embodiments of the present invention will be described with reference to the attached drawings.

As shown in FIGS. 1 and 2, the airbag device 10 of a vehicle according to one embodiment includes a roof airbag device 20.

The roof airbag device 20 is mounted on the roof portion 1a of the vehicle body 1 and may be provided with a roof cushion 21 that protrudes toward the lower cabin when deployed.

In the event of a front collision of a vehicle, the roof cushion 21 may be deployed to protrude toward the cabin and be positioned in front of the occupants. In the event of a frontal collision of a vehicle, the occupants move forward, and at this time, the roof cushion 21 can support and protect the occupants moving forward.

The vehicles may include general vehicles as well as autonomous vehicles, the development of which is accelerating recently.

Autonomous vehicles can be driven without the driver directly driving the car, so the occupants of the front seat 2 and the rear seat 3 can sit facing each other and face each other (see FIG. 10).

When the roof airbag device 20 is deployed in an autonomous vehicle to be deployed between the front seat 2 and the rear seat 3, where the roof cushion 21 is arranged to face each other, the passenger of the front seat 2 and the rear seat (3) It can perform the function of protecting the passengers in the event of a vehicle collision.

The roof airbag device 20 is provided with a housing 22, and the roof cushion 21 is accommodated in a folded or compressed state in the housing 22. When an impact of the vehicle occurs, the roof cushion 21 receives the airbag gas pressure and expands, thereby expanding the housing. (22) It can be withdrawn and deployed externally. The housing 22 may be mounted on the roof portion 1a of the vehicle body 1 along the width direction of the vehicle.

Referring further to FIG. 6, the roof airbag device 20 may be provided with a first inflator 23 that generates airbag gas. The first inflator 23 is connected to the housing 22 to inject airbag gas into the roof cushion 21, so that the airbag gas can be injected into the roof cushion 21 when the roof cushion 21 is deployed.

As shown in FIGS. 1 to 6, the vehicle airbag device 10 is provided on the side surface of the vehicle body 1, and includes a guide rail 30 provided along the protruding direction when the roof cushion 21 is deployed, and a roof The cushion 21 may include a connection portion 40 that slidably connects the loop cushion 21 to the guide rail 30 so that the cushion 21 is deployed and supported along the guide rail 30.

The guide rail 30 is formed to be long in the height direction of the vehicle, and the guide rail 30 may be provided with a guide slit 31 along its length.

The side portion of the car body 1 includes a center pillar portion 1b, and the guide rail 30 may be provided on the center pillar portion 1b. The guide rail 30 may be fixed to the center pillar portion 1b by being welded to it, attached to it, or fastened to it through a fastening member.

The connection portion 40 can smoothly guide the deployment operation of the roof cushion 21 while sliding along the guide rail 30.

In addition, the connection portion 40 allows the roof cushion 21 to be supported on the vehicle body 1 through the guide rail 30 in the deployed state, thereby increasing the support force of the roof cushion 21 in the deployed state.

The roof cushion 21 with increased support suppresses being pushed forward by the occupants moving forward in the event of a front collision of the vehicle, increases the passenger restraint force that restrains the occupants, and thus acts to cushion the impact applied to the occupants. Be able to perform effectively.

The roof airbag device 20 may be mounted along the width direction of the vehicle between a pair of center pillar portions 1b where guide rails 30 are respectively installed. Additionally, the connection portion 40 can bind both sides of the roof cushion 21 to a pair of guide rails 30 in a sliding state in the width direction of the vehicle.

The connection portion 40 connects the lower side of the roof cushion 21 to the guide rail 30 so that the roof cushion 21 can be fully developed along the guide rail 30.

The connection portion 40 includes a slider 50 that is slidably coupled to the guide slit 31 of the guide rail 30, and a tether with one end coupled to the loop cushion 21 and the other end coupled to the slider 50. )(60).

The slider 50 has a body 51 located inside the opening 31a of the guide slit 31 and a guide protrusion 52 coupled to the opening 31a of the guide slit 31. ) can be slid along.

The tether 60 may be coupled to the slider 50 with one end coupled to the loop cushion 21 inside the housing 22 and the other end pulled out to the outside of the housing 22.

One end of the tether 60 is sewn and fixed to the lower side of the loop cushion 21, and the other end of the tether 60 is coupled to the tether fastening portion 53 of the slider 50 extending from the guide protrusion 52. It can be.

Additionally, a locking protrusion 32 may be provided on the guide rail 30 to catch the slider 50 in order to limit sliding of the slider 50 in a state before the roof cushion 21 is deployed.

The slider 50 may be located on the upper part of the guide rail 30 in consideration of the position of the roof cushion 21 accommodated in the housing 22 in a state before being deployed. The locking protrusion 32 protrudes inward of the guide slit 31 on both sides of the opening 31a of the guide slit 31 so that the body 51 of the slider 50, which is located in the upper area of the guide rail 30, is caught. It can be provided as a pair.

The locking protrusion 32 may be provided so that the locking force on the slider 50 is lost due to the deployment pressure of the loop cushion 21 applied to the slider 50 when the roof cushion 21 is deployed. Therefore, the slider 50 can maintain the initial set position until the roof cushion 21 is deployed, and in this state, when the roof cushion 21 is deployed, it slides downward along the guide rail 30 and moves the roof cushion. The expansion operation of (21) can be guided.

The locking protrusion 32 can be made of a material that is easy to form and whose locking force can be easily lost. An adhesive such as hot melt may be used as a material for the locking protrusion 32.

Meanwhile, the vehicle airbag device 10 is covered by the finishing material 4 that finishes the inside of the vehicle body 1 to prevent exposure to the vehicle interior at normal times, and the connecting portion 40 is connected to the finishing material 4 and the vehicle body 1. It is possible to connect between the roof cushion 21 and the guide rail 30 accommodated in the housing 22.

The finishing material (4) may include a headlining (5) that finishes the inside of the roof portion (1a) of the vehicle body (1) and a filler trim (6) that finishes the inside of the center pillar portion (1b) of the vehicle body (1). there is.

The housing 22 containing the roof cushion 21 is prevented from being exposed to the vehicle compartment through the headlining 5 (see Figure 1), and the guide rail 30 is a pillar trim coupled to the center pillar part 1b. Through (6), exposure to the vehicle compartment can be prevented under normal circumstances.

As shown in FIGS. 3 to 6, the vehicle airbag device 10 moves the pillar trim 6 from the center pillar portion 1b so that the guide rail 30 is exposed to the vehicle interior when the roof cushion 21 is deployed. A separation unit 70 for separation may be provided.

The separation unit 70 exposes the guide rail 30 to the vehicle compartment and prevents the connecting portion 40 from being caught in the pillar trim 6, so that when the roof cushion 21 is deployed, the guide rail 30 moves along the guide rail 30. It is possible to ensure that the sliding motion of the connection part 40 moving downward is smooth.

The pillar trim 6 and the center pillar part 1b may be coupled through a coupling part 7. The coupling portion 7 may include a plurality of fasteners 7a to secure the pillar trim 6 to the center pillar portion 1b.

The separation unit 70 is provided to release the coupling of the pillar trim 6 and the center pillar part 1b by the coupling part 7, and performs a separation operation of the pillar trim 6 to expose the guide rail 30 to the vehicle compartment. can be performed.

Here, separating the pillar trim 6 from the center pillar part 1b means that the guide rail 30 is exposed to the interior of the vehicle to prevent the connection part 40 from being caught by the pillar trim 6. This may include separating a portion of the pillar trim 6 from the center pillar part 1b or completely removing it from the center pillar part 1b.

The filler trim 6 may be provided in a split manner by having a plurality of parts 6a and 6b that are divided into each other. The plurality of parts 6a and 6b may include a first part 1a and a second part 1b that cover the guide rail 30. The first part 1a and the second part 1b are each formed to be long along the longitudinal direction of the filler trim 6, so that the filler trim 6 can be divided into two sides.

The separation unit 70 is provided to separate only the first part 6a, which covers the guide rail 30, from the center pillar part 1b while leaving the second part 6b intact, so that the guide rail can be separated using less force. (30) can be exposed to the vehicle compartment.

The separation unit 70 is provided to be inflatable between the first part 6a and the center pillar part 1b, and includes an inflation cushion 71 that separates the first part 6a from the center pillar part 1b, and an airbag. It may include a second inflator 72 that supplies gas to inflate the inflation cushion 71.

The vehicle airbag device 10 is equipped with a front collision detection sensor 90 to detect a front collision of the vehicle, and when a front collision signal of the vehicle is detected through the front collision detection sensor 90, the second inflator 72 It can be driven simultaneously with the first inflator 23 so that the inflation cushion 71 is expanded and the roof cushion 21 is deployed.

The front collision detection sensor 90 transmits the vehicle's front collision detection signal to the processor 100, and the processor 100 operates the first inflator ( 23) and the second inflator 72 can be controlled to be driven simultaneously.

The second inflator 72 is placed on one side of the back of the first part 6a, and the inflation cushion 71 can be placed on the other side of the back of the first part 6a to be connected to the second inflator 72. .

An installation cover 73 for installing the second inflator 72 may be coupled to the center pillar portion 1b. The installation cover 73 is provided to cover the second inflator 72, and may be made of a material with excellent heat resistance to prevent the second inflator 72 from being deformed or damaged due to deterioration.

In addition, the separation unit 70 may be provided with a guide member 74 that guides the expansion direction of the inflation cushion 71 in a direction to spread the gap between the pillar trim 6 and the center pillar part 1b.

The guide member 74 may be opened in the direction of the second inflator 72 opposite the second inflator 72 and may be provided in the form of a ring surrounding the circumference of the inflation cushion 71. The guiding member 74 may be coupled to the rear surface of the first part 6a.

The guide member 74 provided in this way is concentrated along the direction in which the inflation cushion 71, which receives airbag gas through the second inflator 72, spreads between the filler trim 6 and the center pillar portion 1b. By guiding the expansion direction of the inflation cushion 71 so that it expands, the first part 6a can be more smoothly separated from the center pillar portion 1b by the expansion action of the inflation cushion 71.

On one end of the first part 6a opposite the second part 6b, a plurality of support protrusions 6c are disposed along the longitudinal direction of the first part 6a, and a support protrusion corresponding to the position of the support protrusion 6c is provided. The center pillar portion 1b may be provided with a plurality of support protrusions 1c so that the support protrusion 6c is caught.

The support jaw 6c and the support protrusion 1c allow the first part 6a, which is separated from the center pillar part 1b through the expansion cushion 71, to rotate about one side end. By inducing the separation operation of , the separation operation of the first part 6a separated from the center pillar portion 1b can be performed stably.

The support jaw (6c) and the support protrusion (1c) form the rotation center of the first part (6a) separated from the center pillar portion (1b) while being supported by each other and guide the rotation movement of the first part (6a). You can. The support jaw 6c and the support protrusion 1c may be maintained in a locked state or separated from each other so that the first part 6a, which has completed rotation, remains rotated or is separated from the center pillar portion 1b.

As shown in FIGS. 7 and 8, the vehicle airbag device 10 may be provided with a moving unit 80 that moves the position of the housing 22 along the longitudinal direction of the vehicle.

The moving unit 80 moves the position where the roof cushion 21 is deployed in response to the positions of the seats 2 and 3 adjusted in the longitudinal direction of the vehicle, thereby improving the passenger protection effect of the roof cushion 21. It can be done effectively.

The positional movement of the housing 22 by the moving unit 80 may be permitted through the tether 60 provided in the connection portion 60.

To ensure a sufficient range of movement of the housing 22 by the moving unit 80, the tether 60 of the connecting portion 40 may be provided with a sufficient distance between the slider 50 and the housing 22.

The moving unit 80 includes a screw shaft 81 installed in the longitudinal direction of the vehicle so that the housing 22 is screwed together, a motor 82 that rotates the screw shaft 81 in both directions, and a housing 22. It may include a guide member 83 that supports the vehicle so that it can slide in the longitudinal direction of the vehicle in a restricted rotation state.

An extension portion 22a is formed to extend from the housing 22, and the guide member 83 may be provided with a support groove 83a that slideably supports the extension portion 22a in the longitudinal direction of the vehicle.

The guide member 83 is formed long along the longitudinal direction of the vehicle and may be fixed to the roof portion 1a of the vehicle body 1.

The extension portion 22a has a spiral on its inner circumference and has a fastening hole 22b that is screwed to the screw shaft 81, and the motor 82 is a guide member with one end of the screw shaft 81 connected. It can be combined with (83).

To ensure the moving stability of the housing 22 by the moving unit 80, the extension portion 22a and the moving unit 80 may be provided in plural numbers arranged along the longitudinal direction of the housing 22.

9 and 10 show the operation of the moving unit 80 to move the housing 22 so that the position of the housing 22 is adjusted.

As shown in FIGS. 9 and 10, when the motor 82 is driven so that the screw shaft 81 rotates in one direction, the extension portion 22a approaches the motor 82 along the screw shaft 81. The housing 22 can be moved in the reverse direction of the vehicle while driving. In addition, when the motor 82 is driven so that the screw shaft 81 rotates in the other direction, the extension portion 22a travels in a direction away from the motor 82 along the screw shaft 81 and moves the housing 22 toward the vehicle. It can be moved in the forward direction.

The vehicle airbag device 10 includes a seat position sensor 110 that detects the positions of the front seat 2 and the rear seat 3 in the longitudinal direction of the vehicle, and the moving unit 80 includes a seat position sensor ( When the position movement signal of the seats 2 and 3 is detected through 110), the housing 22 can be driven to move to a position maintaining the same distance from the front seat 2 and the rear seat 3. .

The seat position detection sensor 110 transmits the position movement detection signal of the seats 2 and 3 to the processor 100, and the processor 100 transmits the position movement detection signal of the seats 2 and 3 received through the seat position detection sensor 110. The operation of the motor 82 can be controlled based on the position movement detection signal.

In Figure 10, the dotted line X1 indicates the reference position of the front seat (2), the dotted line The reference position (X3) may have the same distance as the reference position (X1) and the reference position (X2).

As shown in Figure 10, for example, when the rear seat 3 moves to the moving position (Y2) along the reverse direction of the vehicle, the moving unit 80 moves from the reference position (X2) to the moving position (Y2). The housing 22 is moved in the reverse direction of the vehicle by the length L2 corresponding to the movement distance L1 of one rear seat 3, so that the housing 22 is moved from the front seat 2 and the rear seat 3 to the same distance. You can keep your distance.

In addition, as shown in FIGS. 11 and 12, which show modified examples, the vehicle airbag device 10 includes air cushions 121 and 131 that protrude from the body 1 of the vehicle to be deployed inside the cabin, and air cushions 121 and 131. ) A guide rail 30 is provided along the protruding direction when the air cushions 121 and 131 are deployed on at least one side of the car body 1 of the two sides of the position where the air cushions 121 and 131 are deployed, and the air cushions 121 and 131 are provided along the guide rail 30. Various modifications may be possible within the scope including the connection portion 40 that slides the air cushions 121 and 131 to the guide rail 30 so that they can be deployed and supported.

At this time, the guide rail 30 and the connecting portion 40 may be configured to have substantially the same structure and form as those in the above-described embodiment, except for their arrangement positions.

As shown in FIG. 11, the vehicle airbag device 10 may include a guide rail 30, a connecting portion 40, and a floor airbag device 120.

The bottom airbag device 120 has a housing 122 installed on the bottom 1d of the vehicle body 1, and the air cushion 121 is accommodated in a compressed state in the housing 122 and is stored in the front of the vehicle. In the event of a collision, it protrudes upward and can protect passengers.

At this time, the guide rails 30 are each installed on a pair of center pillar parts 1b disposed on both sides of the car body 1, and the connection part 40 is a pair of guides on the upper portions of both sides of the air cushion 121. It can be slidably connected to the rail (30).

Therefore, the air cushion 121 can be deployed smoothly through the guide rail 30, and the passenger restraint force can be increased by maintaining the state supported on the guide rail 30 in the deployed state.

As shown in FIG. 12, the vehicle airbag device 10 may include a guide rail 30, a connection portion 40, and a side airbag device 130.

The side airbag device 130 includes a housing 132 installed in the center pillar portion 1b of the vehicle body 1, and the air cushion 131 is accommodated in a compressed state in the housing 132 and then stored in the vehicle. In the event of a frontal collision, it protrudes and deploys laterally to protect passengers.

At this time, the guide rail 30 consists of a pair installed on the roof portion 1a and the bottom portion 1d of the vehicle body 1, and the connection portion 40 is connected to the air cushion 131 in the protruding direction of the air cushion 131. ) can be slidably connected to a pair of guide rails (30).

Therefore, the air cushion 131 can be deployed smoothly through the guide rail 30, and after deployment, it can remain supported on the guide rail 30, thereby increasing the restraint force on the passenger.

10: Vehicle airbag device 20: Roof airbag device
21: roof cushion 22: housing
23: first inflator 30: guide rail
40: Connection 50: Slider
60: Tether 70: Separation unit
71: Cushion for inflation 72: Second inflator
73: Installation cover 74: Guide member
80: moving unit 81: screw axis
82: motor 83: guide member

Claims (16)

A roof airbag device mounted on the roof of the vehicle body and having a roof cushion that protrudes toward the lower vehicle compartment when deployed;
a guide rail provided on a side part of the vehicle body and provided along a direction in which the roof cushion protrudes when deployed; and
An airbag device for a vehicle including a connection part that slidably connects the roof cushion to the guide rail so that the roof cushion is deployed and supported along the guide rail. According to clause 1,
The connection part is,
A slider slidably coupled to the guide rail; and
An airbag device for a vehicle including a tether with one end coupled to the roof cushion and the other end coupled to the slider. According to clause 2,
The guide rail is,
a guide slit that guides sliding of the slider along the development direction of the roof cushion; and
A locking protrusion is provided to lock the slider to limit sliding of the slider in a state before the roof cushion is deployed,
The locking protrusion is a vehicle airbag device in which the locking force on the slider is lost due to the deployment pressure of the roof cushion applied to the slider through the connection portion when the roof cushion is deployed. According to clause 1,
The roof airbag device is mounted along the width direction of the vehicle between a pair of side portions of the vehicle body where the guide rails are respectively installed,
An airbag device for a vehicle wherein the connecting portions are provided in a pair and respectively connect both sides of the roof cushion to the pair of guide rails in the width direction of the vehicle. According to clause 4,
The roof airbag device further includes a housing that accommodates the roof cushion in a compressed state before deployment,
The connection unit is a vehicle airbag device that connects the lower side of the roof cushion to the guide rail. According to clause 1,
The side portion of the vehicle body includes a center pillar portion,
A pillar trim is coupled to the center pillar portion to cover the guide rail,
When the roof cushion is deployed, the vehicle airbag device further includes a separation unit that separates at least a portion of the pillar trim from the center pillar portion so that the guide rail is exposed. According to clause 6,
The pillar trim and the center pillar are coupled through a coupling part,
The separation unit is a vehicle airbag device that releases the coupling between the pillar trim and the center pillar by the coupling unit. According to clause 6,
The filler trim is provided in a split manner having a plurality of parts that are mutually divided, including a first part that covers the guide rail,
The separation unit is a vehicle airbag device that separates the first part excluding the remaining parts from the center pillar part. According to clause 6,
It further includes a first inflator that supplies airbag gas to deploy the roof cushion,
The separation unit is,
an inflatable cushion provided between the filler trim and the center pillar to separate at least a portion of the filler trim from the center pillar when inflated;
An airbag device for a vehicle including a second inflator that supplies airbag gas to inflate the inflation cushion. According to clause 9,
It further includes a front collision detection sensor that detects a front collision of the vehicle,
When a front collision signal is detected through the front collision detection sensor, the first inflator and the second inflator are simultaneously driven to inflate the inflation cushion and deploy the roof cushion. According to clause 9,
The separation unit further includes a guide member that guides the inflation direction of the inflation cushion in a direction to spread the gap between the pillar trim and the center pillar part. According to clause 1,
The roof airbag device includes a housing that accommodates the roof cushion in a compressed state before being deployed; and
An airbag device for a vehicle further comprising a moving unit that moves the position of the housing along the longitudinal direction of the vehicle. According to clause 12,
The mobile unit is,
a screw shaft installed in the longitudinal direction of the vehicle and coupled to the housing in a screw manner;
a motor that rotates the screw shaft in both directions; and
An airbag device for a vehicle including a guide member that slides the housing in the longitudinal direction of the vehicle in a restricted rotation state. According to clause 12,
The connection part is,
A slider slidably coupled to the guide rail; and
It includes a tether, one end of which penetrates the housing and coupled to the roof cushion, and the other end of which is coupled to the slider,
The tether is a vehicle airbag device that allows the housing to be moved by the moving unit. According to clause 12,
The roof cushion is deployed between the front seat and the rear seat provided inside the vehicle compartment,
It further includes a seat position detection sensor that detects the positions of the front seat and rear seat in the longitudinal direction of the vehicle,
The moving unit is a vehicle airbag device that moves the housing to a position maintaining the same distance from the front seat and the rear seat when a seat position movement signal is detected through the seat position detection sensor. A cushion protruding from the body of the vehicle to be deployed inside the cabin;
A guide rail provided along a protruding direction when the air cushion is deployed on the vehicle body on at least one side of the position where the air cushion is deployed; and
An airbag device for a vehicle including a connection part that slidably connects the air cushion to the guide rail so that the air cushion is deployed and supported along the guide rail.

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