JP2017178146A - Occupant protection device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cope with plural kinds of collision forms while suppressing increase of a number of an air bag.SOLUTION: An occupant protection device for a vehicle comprises: a seat 5 on which an occupant who rides on a vehicle seats; and air bag devices which respectively have a hug air bag 32 which is expanded while curving or bending, so as to pass the vicinity of an armpit or an upper body side face from a rear side of a body of an occupant who seats on the seat 5 and go around to a front side of a body upper part. The air bag devices further comprise a support air bag 36 which has a contact face 38 which contacts with the hug air bag 32 in an expanded state. The contact face 38 contacts with the hug air bag 32 on a part opposite to the curve direction or bend direction in the hug air bag 32.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle occupant protection device.

In a vehicle such as an automobile, a seat belt device or an airbag device is used to protect an occupant during a collision.
The airbag apparatus includes a front airbag that is deployed rearward from the front side of the occupant as disclosed in Patent Document 1. The front airbag is deployed when the vehicle collides from the front, for example, and receives and supports an occupant trying to move forward in the event of a front collision.
Moreover, there exists a curtain airbag which expand | deploys in the front-back direction along the vehicle side surface inside like patent document 2. FIG. The curtain airbag is deployed, for example, when there is a collision from the side of the vehicle, and receives and supports an occupant trying to move outward in the vehicle width direction at the time of the side collision.
In addition, there is a side airbag that is deployed between the inner side of the vehicle side surface and the occupant below the curtain airbag. The side airbag, together with the curtain airbag, receives and supports an occupant who intends to move outward in the vehicle width direction in the event of a side collision.

JP2013-014176A Japanese Patent Laid-Open No. 2015-0667123

  Thus, the vehicle is provided with a plurality of airbags in order to cope with a plurality of collision modes. The number of airbags increases approximately proportionally according to the number of collision modes to be dealt with.

  Vehicles are required to cope with a plurality of collision modes while suppressing an increase in the number of airbags.

  An occupant protection device for a vehicle according to the present invention includes a seat on which an occupant seated on the vehicle is seated, and a front side of an upper body passing from the rear side of the body of the occupant seated on the seat under an armpit or an upper body side surface. An airbag device having a embracing airbag that is bent and bent so as to wrap around, and the airbag device has a contact surface that contacts the embracing airbag when deployed The airbag has an airbag, and the contact surface is in contact with the embracing airbag at a portion opposite to a bending direction or a bending direction of the embracing airbag.

  Preferably, the airbag device is provided as a pair on the left and right sides of the occupant seated on the seat, and wraps around the front side of the left and right shoulders, the left and right clavicles, or the left and right upper arms and fastens the wings.

  Preferably, the embracing airbag includes a front deployment portion that deploys forward from the back portion of the seat, and an upper deployment portion that bends and deploys upward or rearward from the front end portion of the front deployment portion. And the upper development part may be developed after the front development part is developed.

  Preferably, the support airbag is deployed forward from the back portion of the seat along a deployment position of the front deployment portion, and the support surface is configured so that a front end of the front deployment portion hits. It is good to incline toward the rear upper part in the front-end | tip part of a bag.

  Preferably, the support airbag has a guide recess formed from the seat toward the contact surface, and the front deployment portion of the embedding airbag is the guide recess of the support airbag previously deployed. It is good to expand along.

In the present invention, the embracing airbag is deployed in a curved or bent manner so as to pass from the rear side of the body of the occupant seated on the seat to the front side of the upper part of the body by passing under the armpit or the upper body side surface. Therefore, the upper body of the occupant who tries to move away from the seat in the event of a collision is caught by the embracing airbag that is deployed in a curved or bent state, making it difficult to move further. This makes it difficult for the occupant's upper body to move in a plurality of collision modes such as a frontal collision and a side collision.
Moreover, the present invention further includes a support airbag having a contact surface that comes into contact with the embedding airbag in a deployed state, and the contact surface entraps in a portion opposite to the bending direction of the embedding airbag. Contact with airbag. Therefore, even if the upper body of the occupant moves in a direction away from the seat and the embracing airbag attempts to deform the load in the direction opposite to the bending direction or the bending direction, the load deformation is supported and suppressed by the supporting airbag. It is possible to easily maintain the original shape of the embracing airbag in a state where a load is applied.
As a result, even when the passenger's load is applied, the embracing airbag maintains the original curved shape or bent shape, and can be suitably supported so that the passenger is less likely to leave the seat.
In particular, since the support airbag separate from the embracing airbag where the occupant's load directly acts is in contact with the occupant's load, the magnitude of the load acting on the embracing airbag due to the difference in the body shape of the seated occupant, etc. Even if the directions are different, the load applied to the support airbag by the embedding airbag is dispersed at the contact portion, and the support airbag is hardly deformed. Therefore, the embedding airbag supported by the supporting airbag is also difficult to deform.

FIG. 1 is a side perspective view of an automobile according to an embodiment of the present invention. FIG. 2 is an explanatory diagram of a passenger protection state by various airbag devices. FIG. 3 is an explanatory diagram of an occupant protection state by the wing tightening airbag device of the present embodiment. FIG. 4 is a block diagram of a control system of the wing fastening airbag apparatus of FIG. FIG. 5 is an explanatory diagram of an operation example of the wing fastening airbag apparatus of FIG. FIG. 6 is an explanatory view of a modified example of the contact portion between the embedding airbag and the support airbag. FIG. 7 is an explanatory view of a modified example of the structure of the embracing airbag. FIG. 8 is an explanatory view of a modified example of the support airbag. FIG. 9 is an explanatory diagram of a modified example of the shape of the embracing airbag.

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

  FIG. 1 is a side perspective view of an automobile 1 according to an embodiment of the present invention. The automobile 1 is an example of a vehicle. FIG. 1 also shows another vehicle that runs in front of the vehicle 1.

  An automobile 1 in FIG. 1 has a vehicle body including a front chamber 2, a passenger compartment 3, and a rear chamber 4. In the front chamber 2, a power unit such as an engine and an electric motor is arranged. A luggage space is provided in the rear chamber 4. The passenger compartment 3 is provided with a seat 5 on which an occupant is seated. In the passenger compartment 3, operating members such as an accelerator pedal, a brake pedal, and a handle are provided in front of the driver's seat 5. The automobile 1 travels, stops, and turns left and right based on the driver's operation.

  FIG. 2 is an explanatory diagram of a passenger protection state by various airbag devices.

FIG. 2A illustrates a front airbag device 11 that deploys the front airbag 12 from the front of the occupant seated on the seat 5 toward the occupant. The front airbag device 11 includes an inflator, an undeployed front airbag 12, and a main body 13 that accommodates these. The main body 13 is disposed on a dashboard or a handle, for example. When the inflator is ignited, the front airbag 12 is deployed rearward. By deploying the front airbag 12 in front of the occupant seated on the seat 5, it is possible to receive and support the occupant who moves forward in the event of a collision from the front side, for example.
FIG. 2B shows a curtain airbag device 16 that deploys the curtain airbag 17 along the front-rear direction outside the occupant seated on the seat 5, and the front-rear direction below the curtain airbag 17. A side airbag device 21 for deploying the side airbag 22 is shown. The main body 18 of the curtain airbag device 16 is disposed on a roof rail, for example. The curtain airbag device 16 is deployed along the window glass in a range from the A pillar to the C pillar. The main body 23 of the side airbag device 21 is disposed, for example, on the outer portion of the back portion of the seat 5. The side airbag device 21 deploys the side airbag 22 from the outer portion of the back portion of the seat 5 toward the front. The curtain airbag 17 and the side airbag 22 are deployed on the outer side in the vehicle width direction of the occupant seated on the seat 5, for example, to catch the occupant trying to move outward in the vehicle width direction in the event of a collision from the side. , Can secure a space between the occupant and the door.
FIG. 2C shows a front airbag device 11 and a side airbag device 21. The front airbag 12 and the side airbag 22 are deployed on the front side of the occupant seated on the seat 5 and on the outer side in the vehicle width direction, thereby catching the occupant who is going to move diagonally forward in the event of a collision from diagonally forward, for example. Can be supported.
Thus, the automobile 1 is provided with a plurality of airbags in order to cope with a plurality of collision modes. The number of airbags increases approximately proportionally according to the number of collision modes to be dealt with. As collision safety standards are strengthened or reviewed in the future, it will be necessary to provide more airbags.
Therefore, the automobile 1 is required to be able to cope with a plurality of collision modes while suppressing an increase in the number of airbags.

  FIG. 3 is an explanatory diagram of a passenger protection state by the wing fastening air bag device 31 of the present embodiment. 3A is a side view, FIG. 3B is a front view, and FIG. 3C is a top view.

  3 has a right airbag device and a left airbag device. A pair of left and right passengers seated on the seat 5 are provided.

The right airbag device has a right-side holding airbag 32, a right-side support airbag 36, and a right-side main body 39 that accommodates the inflator.
The main body 39 of the right airbag device is disposed on the right side of the back portion of the seat 5, for example. The main body 39 may be disposed on the right side portion of the seat portion of the seat 5. Here, the right side is the inside in the vehicle width direction.
The right airbag 32 has a deployment shape that is curved in a substantially U shape. The holding airbag 32 is deployed from the main body 39 toward the front, and is deployed in a posture in which the substantially U shape is on the upper side and the U-shaped concave portion 41 with the substantially U shape is facing backward. Hereinafter, a portion of the deployed airbag 32 that linearly deploys forward from the main body 39 is referred to as a front deployment portion 33, and is bent upward from the front end portion of the front deployment portion 33 further upward and rearward. The portion to be developed is referred to as the upper development portion 34.
The right support airbag 36 has a substantially straight deployment shape that is equal to or longer than the front deployment portion 33. A guide recess 37 is formed in the substantially straight support airbag 36. The guide recess 37 is formed in an upper portion on the seat 5 side in a portion other than the tip of the support airbag 36. Thereby, the support airbag 36 has a substantially L-shaped cross-sectional shape. The support airbag 36 is linearly deployed forward from the main body 39 along the deployment position of the front deployment portion 33 on the lower side of the embracing airbag 32. In the deployed state, the distal end portion of the front deployment portion 33 contacts the rear surface of the distal end portion of the support airbag 36. The contact surface 38 at the distal end portion of the support airbag 36 is formed to be inclined toward the rear upper side. Further, the lower surface of the front deployment portion 33 comes into contact from the rear end to the front end portion of the support airbag 36. The substantially L-shaped support airbag 36 is in surface contact with the lower portion of the front deployment portion 33 and the outer portion away from the seat 5.

The left airbag device includes a left-side embedment airbag 32, a left-side support airbag 36, and a left-side main body 39 that accommodates the inflator. Here, the left side is the outside in the vehicle width direction.
The main body 39 of the left airbag device is disposed, for example, on the left side portion of the back portion of the seat 5. The main body 39 may be disposed on the left side portion of the seat portion of the seat 5.
The shape and deployed state of the left-side embedment airbag 32 and the support airbag 36 are the same as those on the right side, and a description thereof is omitted.

  FIG. 4 is a block diagram of a control system of the wing tying airbag device 31 of FIG.

  4 includes an imaging device 51, an acceleration sensor 52, a speed sensor 53, a brake operation sensor 54, an angular speed sensor 55, a belt tension sensor 56, a belt winding amount sensor 57, a seating sensor 58, a timer 59, and these. A control unit 60 connected thereto; FIG. 4 also shows a seat belt device and an airbag device that are controlled objects connected to the control unit 60. The airbag device here includes a wing-clamping airbag device 31.

  The imaging device 51 is, for example, a pair of imaging elements, and is provided forward on the roof or windshield of the passenger compartment 3 as shown in the figure, and observes the surrounding situation in front of the automobile 1 by imaging. The control unit 60 can identify an obstacle such as another automobile in front of the automobile 1 as the surrounding situation of the automobile 1 from the captured image, and can determine the possibility of the collision of the obstacle. Thereby, the driving | running | working condition of the motor vehicle 1 before a collision can be detected.

  The acceleration sensor 52 is fixed to the vehicle body and detects an acceleration that acts on the automobile 1 as the traveling state of the automobile 1. Thereby, the deceleration of the automobile 1 before the collision can be detected. Further, since a large deceleration occurs at the time of a collision, the collision of the automobile 1 can be detected.

  The speed sensor 53 is fixed to the vehicle body and detects the speed of the automobile 1 as the traveling state of the automobile 1.

  The brake operation sensor 54 is provided in the passenger compartment 3 and detects the depression operation of the brake pedal by the passenger. Thereby, the deceleration operation of the automobile 1 before the collision can be detected.

  The angular velocity sensor 55 is fixed to the vehicle body and detects the speed of the automobile 1 as the traveling state of the automobile 1.

  The belt tension sensor 56 is provided, for example, in the retractor device, and detects the tension acting on the strap. Accordingly, it is possible to detect the movement of the occupant's body that moves relatively forward during the rear-end collision, or the tension acting on the strap due to the movement of the body.

  The belt winding amount sensor 57 is provided, for example, in the retractor device, and detects the winding amount of the strap.

  The seating sensor 58 is provided, for example, on the seating surface of the seat 5 and detects the seating of the occupant on the seat 5 and the seating position.

  The timer 59 measures time.

  The controller 60 controls the occupant protection operation by the seat belt device and the airbag device based on the detection signals of these sensors. For example, the control unit 60 performs the pre-collision control based on the collision prediction, and performs the collision control based on the collision detection.

  FIG. 5 is an explanatory view of an operation example of the wing fastening airbag apparatus 31 of FIG.

As shown in FIG. 5A, the occupant is seated on the seat 5 before the collision.
For example, the control unit 60 periodically predicts the possibility of a collision based on the image of the imaging device 51. When there is a possibility of collision, the control unit 60 activates the seat belt device and attracts the upper body of the occupant to the seat 5.
Thereafter, the control unit 60 detects a collision based on the detection value of the acceleration sensor 52, for example. And when a collision is detected, the control part 60 operates an airbag apparatus.

  First, as shown in FIG. 5B, the wing-clamping airbag device 31 deploys the support airbag 36. The support airbag 36 is deployed forward from the left and right side surfaces of the back portion of the seat 5. The support airbag 36 is deployed so as to pass under the occupant's armpits or near the side of the upper body seated on the seat 5 and protrude toward the front of the occupant. At this time, when the upper limb of the occupant is descending, the support airbag 36 can enter between the upper limb and the trunk and widen the space between them.

  Next, as shown in FIG. 5 (C), the wing tying airbag device 31 deploys the embedding airbag 32. In the holding airbag 32, the front deployment part 33 is first deployed. The front deployment portion 33 is deployed forward from the left and right side surfaces of the back portion of the seat 5 along the guide recess 37 on the upper side of the support airbag 36 that has been deployed so as to extend in the front-rear direction. The front end of the front deployment part 33 hits the rear side surface of the front end part of the support airbag 36.

Thus, after the front deployment portion 33 is deployed, the upper deployment portion 34 of the embracing airbag 32 begins to deploy. As shown in FIG. 5 (D), the upper deployment part 34 is deployed upward on the front side of the occupant's shoulder, and further deployed upward and rearward so as to go around the occupant's shoulder.
Thereby, the embedding airbag 32 protrudes forward from the occupant's armpit, and is further deployed so as to curve upward and rearward. With the pair of left and right embrace airbags 32, the left and right shoulders of the occupant can be carried so that the wings are tightened. In this state, the lower side of the front deployment portion 33 and the outer surface in the width direction of the seat 5 of the embedding airbag 32 that curves upward are in contact with the guide recess 37 of the support airbag 36. Further, the front end portion of the front deployment portion 33 of the embedding airbag 32 that curves upward is in contact with the contact surface 38 that is inclined behind the front end portion of the support airbag 36. The embedding airbag 32 is in contact with the support airbag 36 at a portion opposite to the bending direction.

As described above, in the present embodiment, the embrace airbag 32 is curved so as to pass from the rear side of the body of the occupant seated on the seat 5 to the front side of the upper part of the body by passing under the armpit or the upper body side surface. Or it is bent and developed. Therefore, the upper body of the occupant who intends to move away from the seat 5 in the event of a collision is caught by the embracing airbag 32 that is curved or bent and is difficult to move further. Thereby, for example, the upper body of the occupant can hardly be separated from the seat 5 in a plurality of collision modes such as a frontal collision, a side collision, an oblique frontal collision, and a rearward collision.
Moreover, the present invention further includes a support airbag 36 having a contact surface 38 that contacts the embedding airbag 32 in a deployed state, and the contact surface 38 is opposite to the bending direction of the embedding airbag 32. It contacts the embrace airbag 32 at the side portion. Therefore, even if the occupant airbag 32 attempts to load deform toward the direction opposite to the bending direction or the bending direction by moving the upper body of the occupant away from the seat 5, the load deformation is caused by the support airbag 36. It can be supported and restrained, and it becomes easy for the embedding airbag 32 to maintain its original shape in a state where a load is applied.
As a result, even when the passenger's load is applied, the embedment airbag 32 maintains the original curved shape or bent shape, and can be suitably supported so that the occupant is less likely to leave the seat 5.

  Further, in the present embodiment, the left and right shoulders are winged together, so that the upper body of the occupant seated on the seat 5 is winged from the left and right rear sides and is difficult to separate from the seat 5 as a whole.

  In the present embodiment, the embracing airbag 32 is such that the front deployment portion 33 is first deployed forward from the back of the seat 5, and then the upper deployment portion 34 is above or above the front end portion of the front deployment portion 33. Expand backwards. Even when the embracing airbag 32 is deployed in a state where the occupant is seated on the seat 5, the embracing airbag 32 passes from the rear side of the occupant's body to the armpit or near the upper body side and passes through the body. It can be deployed so as to wrap around the upper front side.

  In the present embodiment, when the front deployment portion 33 is deployed, the tip portion of the front deployment portion 33 contacts the contact surface 38 of the support airbag 36. Since the contact surface 38 is provided so as to be inclined toward the rear upper side, the upper development part 34 that is developed thereafter is easily developed upward or upward and rearward from the tip part of the front development part 33. The deployment direction of the upper deployment part 34 can be directed by the contact surface 38.

  Moreover, in this embodiment, the front expansion | deployment part 33 of the embedding airbag 32 expand | deploys along the guide recessed part 37 formed toward the inclined surface from the sheet | seat 5 about the support airbag 36 expand | deployed previously. As a result, the support airbag 36 is deployed first, thereby forming a gap between the upper body side surface of the occupant seated on the seat 5 and the arm, and the embracing airbag 32 is inserted into the occupant's body through the gap. Can be deployed from the rear side to the front side. In addition, since the front deployment portion 33 of the embedding airbag 32 is deployed while being guided by the guide recess 37 of the support airbag 36, the direction and state of deployment are stabilized. As a result, the upper deployment part 34 can be stably deployed on the front side of a desired part of the upper part of the body.

  The above embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications or changes can be made without departing from the scope of the invention.

FIG. 6 is an explanatory diagram of a modified example of the contact portion between the embedding airbag 32 and the support airbag 36.
FIG. 6A shows a state in which the lower side of the front deployment portion 33 and the outer surface in the seat 5 width direction of the holding airbag 32 and the guide recess 37 of the support airbag 36 in the deployed state, as in the embodiment. Contact. In addition, the front end portion of the front deployment portion 33 contacts a contact surface 38 that is inclined on the rear side of the front end portion of the support airbag 36. In particular, the inclined contact surface 38 is a surface that is substantially perpendicular to the direction in which the shoulder of the occupant moves forward and downward. As a result, when the embracing airbag 32 is about to move forward and downward due to the load of the occupant, this movement can be effectively suppressed by the support airbag 36.
FIG. 6B shows a state in which the lower side of the front deployment portion 33 and the outer surface in the width direction of the seat 5 partially contact the guide recess 37 of the support airbag 36 in the deployed state. . In addition, the front end portion of the front deployment portion 33 contacts a contact surface 38 that is inclined on the rear side of the front end portion of the support airbag 36. In particular, the inclined contact surface 38 is a surface that is substantially perpendicular to the direction in which the shoulder of the occupant moves forward and downward.
In FIG. 6C, in the deployed state, the lower side of the front deployment portion 33 of the embedding airbag 32 and the outer surface in the width direction of the seat 5 are separated from the guide recess 37 of the support airbag 36.
FIG. 6D shows the contact state between the deployed airbag 32 and the support airbag 36 as in FIG. 6A. However, the tip portion of the support airbag 36 is formed thin.
Even in these cases, when the embracing airbag 32 is about to move forward and downward due to the load of the occupant, this movement can be effectively suppressed by the support airbag 36.

FIG. 7 is an explanatory view of a modified example of the structure of the embracing airbag 32.
In FIG. 7A, the embedding airbag 32 is divided into an air chamber for the front deployment portion 33 and an air chamber for the upper deployment portion 34 by the partition member 61. A valve is provided between these air chambers. In this case, the holding airbag 32 can be configured such that the front deployment portion 33 is first deployed, and then the upper deployment portion 34 is deployed when the pressure of the front deployment portion 33 exceeds the threshold value of the valve.
In FIG. 7B, the embedding airbag 32 has a tether 62. The tether 62 is stretched between the lower surface of the front deployment part 33 and the upper surface of the upper deployment part 34. In this case, when the front deployment part 33 is deployed and the high-pressure gas begins to flow into the upper deployment part 34, the tether 62 is cut and the upper deployment part 34 can be deployed upward.
Even in these cases, the embracing airbag 32 first deploys the front deployment portion 33 and then deploys the upper deployment portion 34.

FIG. 8 is an explanatory diagram of a modified example of the support airbag 36.
A contact surface 38 on the rear side of the tip of the support airbag 36 in FIG. 8 is coated with a material having a low coefficient of friction. This makes it difficult for the embedding airbag 32 deployed later to be caught by the support airbag 36 deployed earlier during deployment. The coating may be applied to the guide recess 37 or to the embedding airbag 32.

FIG. 9 is an explanatory diagram of a modified example of the shape of the embracing airbag 32.
In FIG. 9, the embracing airbag 32 is deployed not on the left and right shoulders but on the front side of the left and right clavicles. In addition, the embrace airbag 32 may wrap around the front side of the left and right upper arms. Even in these cases, the occupant airbag 32 can tie both the shoulders of the occupant.

1 ... Automobile (vehicle)
2 ... Front room 3 ... Passenger room 4 ... Rear room 5 ... Seat 11 ... Front airbag device 12 ... Front airbag 13 ... Body 16 ... Curtain airbag device 17 ... Curtain airbag 18 ... Body 21 ... Side airbag device 22 ... side airbag 23 ... main body 31 ... wing tie-down airbag device 32 ... embedding airbag 33 ... forward deployment part 34 ... upper deployment part 36 ... support airbag 37 ... guide recess 38 ... contact surface 39 ... body 41 ... U-shape Recess 51 ... Imaging device 52 ... Acceleration sensor 53 ... Speed sensor 54 ... Brake operation sensor 55 ... Angular speed sensor 56 ... Belt tension sensor 57 ... Belt take-up sensor 58 ... Seat sensor 59 ... Timer 60 ... Control unit 61 ... Partition member 62 ... Tether

Claims (5)

A seat on which an occupant in the vehicle sits;
An airbag device having an embedding airbag that is curved and bent so as to pass from the rear side of the body of the occupant seated on the seat to the front side of the upper part of the body by passing under the armpit or the upper body side surface; ,
Have
The airbag device includes:
A support airbag having a contact surface in contact with the embedding airbag in the deployed state;
The contact surface is in contact with the embracing airbag at a portion opposite to a bending direction or a bending direction of the embracing airbag;
Vehicle occupant protection device. The airbag device is provided as a pair on the left and right of the occupant seated on the seat, and wraps around the front side of the left and right shoulders, the left and right clavicles, or the left and right upper arms,
The vehicle occupant protection device according to claim 1. The embracing airbag has a front deployment portion that deploys forward from the back portion of the seat, and an upper deployment portion that bends and deploys upward or rearward from the front end portion of the front deployment portion. And
The upper deployment part is deployed after the front deployment part is deployed,
The vehicle occupant protection device according to claim 1 or 2. The support airbag is deployed forward from the back portion of the seat along the deployment position of the front deployment portion,
The contact surface is provided to be inclined rearward and upward at the tip portion of the support airbag so that the tip of the front deployment portion hits.
The vehicle occupant protection device according to claim 3. The support airbag has a guide recess formed from the seat toward the contact surface,
The front deployment portion of the embedding airbag is deployed along the guide recess of the support airbag deployed earlier.
The vehicle occupant protection device according to claim 3.

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