KR100792916B1 - Passenger seat airbag door separator - Google Patents

Abstract

The present invention relates to a passenger seat airbag door separation device, which allows the door part of the crash pad to be opened so that the passenger seat airbag cushion can be folded, thereby preventing collision with the wind glass by the door part, thereby preventing secondary damage due to window glass fragments. The purpose is to prevent the risk of injury.

The present invention for achieving the above object, when the passenger seat airbag is accommodated inside the passenger seat position of the crash panel (D) forming the driver's seat is operated during the operation of the airbag module (1) through the ACU (Air bag Control Unit) It is characterized in that it comprises a door separating device for separating the airbag door 4 into two parts by the expansion pressure of the airbag cushion 2 to be deployed.

Description

Passenger seat air bag door separation device {Departure device of passenger's air bag door}

1 is a block diagram of a passenger seat airbag door separation apparatus according to the present invention

Figure 2 (a), (b) is a block diagram of the link member for removing the passenger seat airbag door according to the present invention

3 (a) to (c) is a deployment state diagram of the passenger seat airbag door separation according to the present invention

    <Description of the symbols for the main parts of the drawings>

1: airbag module 2: airbag cushion

3: airbag module housing 4: airbag door

4a: lower door 4b: upper door

4c: Incision groove 4d: Separation groove

5: door hinge strap 6: door folding hinge bar

7: separation bar 7a, 8a: body rod

7b: Channel 7c, 8d: Hinge end

8: fixing bar 8b: insertion stop

8c: gap forming axis

9: connection strap D: crash panel

The present invention relates to a passenger airbag, and more particularly to a passenger airbag door separation device.

In general, there are active safety devices (brake, ABS, TCS, Navigation) to prevent accidents, and passive safety devices (safty belt, airbag, pretentioner) to protect passengers in case of accidents. It is mounted.

Among these safety devices, the airbag system is a device that protects the occupants by inflating the airbags with gas before the second collision of the occupants in a collision, and is used to prevent facial injury by being mounted on the driver's seat and the passenger seat.

The dual passenger airbag system is mounted in the crash pad so that in the event of a vehicle crash, the passenger in the passenger seat will be injured when the upper body is hit by the inertia and the windshield as it is directed to the front windshield. It is also used as a means to protect lives.

However, such a passenger seat airbag system is rapidly moved toward the front window glass while being separated by the airbag in which the door part, which is a part of the crash pad, is deployed, in which case the door hits the front windgrass, As a result, the window glass cracks or breaks, causing the passenger to have a second injury.

Accordingly, the present invention has been made in view of the above, and the door part of the crash pad, which is opened so that the passenger seat airbag cushion is developed, is folded, thereby preventing the door part from colliding with the wind glass, and thus as a window glass fragment. The purpose is to prevent the risk of secondary injury.

The present invention for achieving the above object, the airbag cushion that is received in the passenger seat position of the crash panel constituting the driver's seat inside the operation of the airbag module operated through the air bag control unit (ACU), the outside of the crash panel deployed Airbag door separator that separates from the crash panel at the inflation pressure of

An airbag door including upper and lower doors respectively partitioned into a crash panel through a separation groove so as to be separated by an airbag cushion, and an incision groove in which an intermediate portion thereof is cut out so that the upper and lower doors are separated;

A door hinge strap having one end fixed to the upper door and the other end fixed to the lower door to restrain the lower door to be folded toward the upper door after the airbag cushion is deployed;

A door folding hinge bar fixed to the lower portion of the airbag door and the airbag module housing to reduce the speed of detachment after being separated by the inflating airbag cushion to constrain the lower portion of the airbag door;

A connection strap secured to the airbag door and the airbag module housing to hold and restrain the airbag door that is separated after being separated by the airbag cushion;

Characterized in that consisting of.

The door folding hinge bar has a separation bar having one end hinged to the lower door, one end of which is fixed to the airbag module housing, and the other end of which is fitted to the separation bar.

In addition, the separation bar comprises a hinge fastening end hinged to the lower door, a body rod extending from the hinge fastening end and a channel cut to the end portion in the longitudinal direction of the body rod.

In addition, the fixing bar has an elongated body rod, an insertion end protruding from the end of the body rod via a gap forming shaft so as to be inserted into the cut-out channel of the separation bar, and an airbag module housing at an opposite portion of the insertion end. The hinge is fixed to the hinge end.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows the configuration of the passenger seat airbag door separation device according to the present invention, the passenger seat airbag according to the present invention is an airbag module housing (3) accommodated inside the passenger seat position of the crash panel (D) constituting the driver's seat The airbag door is divided into two parts and separated by the inflation pressure of the airbag module (1) mounted through the ACU (Air bag Control Unit) and the airbag cushion (2) deployed during operation of the airbag module (1) (4), a door hinge strap (5) for restraining the lower portion of the airbag door (4) to be folded toward the upper portion after the airbag cushion (2) deployment to the divided portion of the airbag door (4), the lower portion of the airbag door (4) Door folding hinge bars (6) and airbag cues fixed to the bottom of the airbag door (4) and the airbag module housing (3) to constrain the site and reduce the rate of separation after being separated by the inflating airbag cushion (2) After the separation by the following formula (2) is composed of the connecting straps (9) fixed to the air bag door (4) and the airbag module housing (3) so as to hold the air bag restraint door 4 falling off.

Here, the airbag door 4 is divided into upper and lower doors 4b and 4a respectively partitioned into the crash panel D through the separating groove 4d to be separated by the airbag cushion 2, and the upper and lower doors. It consists of an incision groove 4c which cuts the middle part so that 4b and 4a are isolate | separated.

In addition, one end of the door hinge strap 5 is fixed to the upper door 4b, and the other end of the door hinge strap 5 reduces the speed of falling off after being separated when the lower door 4a is separated, and at the same time, the upper door 4a holds the lower door 4a. It is fixed to restrain to be folded toward the door 4b.

The door folding hinge bar 6 has a separation bar 7 having one end hinged to the lower door 4a, one end of which is hinged to the airbag module housing 3, and the other end of which is fitted to the separation bar 7 It consists of a fixed bar (8) to be coupled.

Here, the separation bar 7 has a hinge fastening end 7c hinged to the lower door 4a and a body rod 7a extending from the hinge fastening end 7c as shown in FIG. ) And a channel 7b cut to the end portion in the longitudinal direction of the body rod 7a.

At this time, the channel 7b is the end portion cut along the longitudinal direction of the body rod (7a) while forming the largest width of the end portion of the hinge fastening end (7c) as shown in Figure 2 (b) Is made in a shape that is in contact with each other.

In addition, the fixing bar 8 is formed of the body rod 8a elongated as shown in FIG. 2 (b) and the cut off channel 7b of the separation bar 7. An insertion locking end 8b protruding from the gap forming shaft 8c at one end and a hinge fastening end 8d hingedly fixed to the airbag module housing 3 at a portion opposite to the insertion locking end 8b.

In addition, the hinge fastening of the separating bar 7 and the fixing bar 8 may have a structure in which a protruding pin is integrally formed and inserted through a groove or through a separate pin.

Hereinafter, the operation of the present invention will be described in detail with reference to the accompanying drawings.

The passenger seat airbag device of the present invention reduces the sudden separation speed of the airbag door 4 separated from the crash panel D by the inflation pressure of the airbag cushion 2 deployed out of the crash panel D during operation. As the separated airbag door 4 hits the window glass and is broken, it has a feature of blocking the possibility of secondary injury due to debris.

This is in accordance with the action of the airbag door separator that controls the deployment speed of the airbag door 4, i.e., as shown in Fig. 3 (a), the airbag cushion 2 deployed from the airbag module 1 by the ACU is When the lower door 4a, which forms the lower part of the airbag door 4, is pressed by the inflation pressure, the lower door 4a is pushed out and the separation groove 4d separating the upper and lower doors 4b and 4a. The door hinge strap (5) for holding the part will fall off in restrained state.

 At this time, the door folding hinge bar 6 provided between the airbag module housing 3 and the lower door 4a is extended to prevent separation of the lower door 4a, which is to be separated from the crash panel D. This is because the fixing bar 8 hinged to the airbag module housing 3 restrains the separation bar 7 hinged to the lower door 4a to some extent.

That is, when the separation bar 7 receives a force from the lower door 4a to be separated in the state in which the fixing bar 8 is engaged with the separation bar 7, the insertion locking end 8b of the fixing bar 8 ) Restrains the lower door 4a until it is completely disengaged along the channel 7b cut in the length direction of the rod 7a of the separation bar 7.

As the channel 7b of the separation bar 7 is cut in the longitudinal direction of the rod 7a as shown in FIG. 2 (b), the end portions thereof come into contact with each other. This is because the channel 7b causes frictional resistance with the insertion end 8b of the fixing bar 8 so that the separation of the fixing bar 8 and 7) is prevented to some extent.

Subsequently, as shown in FIG. 3 (b), such as the upper door 4b which is detached as the deployment of the airbag cushion 2 proceeds further, the separating bar 7 and the fixing bar that restrain the lower door 4a are fixed. (8) is completely separated so that the lower door (4a) is also completely separated from the crash pad (D).

That is, the separation bar 7 is further pulled from the lower door 4a, which is further pressurized as the air bag cushion 2 is deployed, which causes the channel 7b to be separated from the fixed bar 8 by the channel 7b. It overcomes the friction force generated by the insertion stop end 8b and is completely separated from the fixing bar 8.

Subsequently, as the upper and lower doors 4b and 4a are completely separated from the crash pad D due to the deployment of the airbag cushion 2, the airbag cushion 2 as shown in FIG. The upper and lower doors 4b and 4a, which are developed toward the upper side and restrained by the connecting strap 9, are separated while being folded together, that is, the lower door 4a overlaps the upper door 4b.

At this time, the door hinge straps 5 fixed to the upper door 4b and the lower door 4a are respectively restrained to be folded toward the upper door 4b by holding the lower door 4a, and the door hinge strap ( The length of 5) has a sufficient length that the lower door 4a is folded toward the upper door 4b.

In this manner, when the airbag cushion 2 is deployed, the moment when the airbag door 4 separated by the upper and lower doors 4b and 4a is separated from the crash pad D is delayed to some extent and the lower door 4a is folded. The upper and lower doors 4b and 4a through frictional resistance between the separating bar 7 fixed to the lower door 4a and the fixing bar 8 fixed to the airbag module housing 3 so as to be separated. By delaying the detachment of the lower door 4a which first receives the deployment pressure of the airbag cushion 2 applied to the airbag door 4 that has been applied, the door hinge strap 5 is removed when the airbag cushion 2 is fully deployed. As a result, the lower door 4a is overlapped toward the upper door 4b so as to implement a separation behavior.

As described above, according to the present invention, the lower part of the airbag door which is first subjected to the deployment pressure of the airbag cushion is dualized so as to be separated from the upper part, and at the same time, the separation of the lower part is delayed to some extent so as to overlap the upper part when it is separated. Therefore, it is possible to prevent the collision with the wind glass by the rapid detachment of the integrated single-piece airbag door part, thereby preventing the risk of secondary injury due to the window glass fragments.

Claims (5)

The airbag cushion 2 which is received inside the driver's seat of the crash panel (D) forming the driver's seat and is deployed out of the crash panel (D) when the airbag module (1) operated through the air bag control unit (ACU) is operated. Airbag door separator which is separated from the crash panel (D) by the inflation pressure of The upper and lower doors 4b and 4a respectively partitioned by the crash panel D through the separating groove 4d so as to be separated by the airbag cushion 2 and the upper and lower doors 4b and 4a are separated from each other. An airbag door 4 formed of an incision groove 4c in which an intermediate portion is cut off; One end is fixed to the upper door (4b) and the other end is fixed to the lower door (4a) door hinge strap (5) to restrain the folding to the upper door (4b) to grab the lower door (4a) after deployment of the airbag cushion (2) ; The door folding hinge fixed to the lower part of the airbag door 4 and the airbag module housing 3 so as to reduce the speed of separation after being separated by the airbag cushion 2 which expands by constraining the lower part of the airbag door 4. Bar 6 and; Passenger seat airbag, characterized in that it consists of an airbag door 4 and a connection strap 9 fixed to the airbag module housing 3 to hold and restrain the airbag door 4 that is separated and separated by the airbag cushion 2. Door release device. 2. The door folding hinge bar (6) according to claim 1, wherein the door folding hinge bar (6) has a separation bar (7), one end of which is hinged to the lower door (4a), one end of which is hinged to the airbag module housing (3), and the other end of the separation bar (7). Passenger seat airbag door separation device, characterized in that consisting of a fixed bar (8) is fitted to be coupled to. The method of claim 2, wherein the separation bar (7) is a hinge fastening end (7c) hinged to the lower door (4a), the body rod (7a) and the body rod (7a) extending from the hinge fastening end (7c) A passenger seat airbag door separation device, characterized in that it is made of a channel (7b) cut to the end portion in the longitudinal direction of the). The method of claim 3, wherein the channel (7b) is formed in the shape that the end portions cut along the longitudinal direction of the body rod (7a) is in contact with each other while forming the largest width of the end portion of the hinge fastening end (7c) A passenger seat airbag door separator. 3. The shaft 8c according to claim 2, wherein the fixing bar 8 is formed at one end of the body rod 8a so as to fit into the elongated body rod 8a and the cutout channel 7b of the separation bar 7. A passenger seat airbag door separation comprising an insertion locking end 8b protruding through a) and a hinge fastening end 8d hingedly fixed to the airbag module housing 3 at an opposite portion of the insertion locking end 8b. Device.

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