JP2023160205A - Occupant protection device - Google Patents

Abstract

To provide an occupant protection device configured so that a seat belt having an airbag assembled thereto can be smoothly inserted into and pulled out from a feed-out port part.SOLUTION: In an occupant protection device MS, a feed-out port part 40 having a feed-out port 45 opened so as to enable a seat belt 25 extending from a take-up device arranged in a backrest part 2 to be fed forward is arranged at an upper end 3tL of the backrest part of a seat 1, and an airbag inflated to be able to receive an upper body of an occupant by gas for inflation flown thereinto is assembled to a lap belt part of the seat belt attached to the occupant. The feed-out port part is mounted on a mounting base part 8 of the backrest part so that at least an opening direction OD of the feed-out port can be turned toward a direction in an angular range from a forward direction FD in which the seat belt can be fed forward to an oblique direction CD in which a tongue of the seat belt can be fed out to be fastened to a buckle.SELECTED DRAWING: Figure 4

Description

The present invention relates to an occupant protection device for protecting an occupant seated on a seat.

Conventionally, known occupant protection devices protect occupants seated on seats by assembling an airbag that inflates by infusing inflation gas into the lap belt portion of a seat belt (for example, Patent Document (see 1). The seat has a seat portion and a backrest portion, and a feeding outlet is provided at one upper end of the backrest portion in the left and right direction so that the seatbelt extending from a retractor can be fed out forward. section is arranged. The outlet of the outlet opened toward the front in a substantially rectangular shape that was slightly larger than the cross-sectional shape of the seat belt. Then, the seatbelt is secured to the seat belt by fastening the tongue of the seatbelt that is fed out from the feeding port of the feeding port to a buckle disposed on the other side of the seat in the left-right direction opposite to the feeding port. The part from the buckle to the seat belt is used as the shoulder belt part of the seat belt that can restrain the front side of the upper body of the occupant. The lap belt portion of the seat belt capable of restraining the front side of the occupant's waist is configured to be attached to the occupant seated on the seat. As described above, the airbag is folded and assembled into the lap belt section so that when activated, inflation gas flows into the airbag and the airbag is inflated to accommodate the upper body of the occupant.

Japanese Patent Application Publication No. 2012-56345

In conventional occupant protection devices, the seatbelt's feeding port only opens forward, and in the initial state before the seatbelt is fed out, it extends forward from the feeding port of the seatbelt. It hangs downward so that it fits tightly against the front side of the backrest, and when fastening the tongue to the buckle like fastening a seatbelt, it hangs diagonally forward and downward from the outlet to the buckle side. The seatbelts were to be extended. At that time, the outlet was only opened forward, and the seat belt interfered with the periphery of the outlet during the unrolling process, making it difficult to quickly unroll the seatbelt. Of course, on the contrary, when the seat belt is removed after being fastened, that is, when the seat belt is released, the tension force of the retractor causes the seat belt to return to its initial state before it was unrolled. However, the folded airbag is installed in an inflatable manner in the lap belt section, and due to the weight of the folded airbag, it tends to interfere with the vicinity of the outlet, making it impossible to smoothly return to the initial state. was there.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an occupant protection device that allows a seatbelt with an airbag assembled thereto to be smoothly inserted and removed from a delivery port.

In the occupant protection device according to the present invention, a seat belt extending from a winding device disposed inside the backrest is attached to the upper end of one of the left and right sides of the backrest in a seat having a seat and a backrest. A dispensing port portion that opens the dispensing port so that the dispensing material can be dispensed is provided,
The seatbelt is wound by fastening the tongue of the seatbelt fed out from the feeding opening to a buckle disposed on the other side of the seat in the left-right direction opposite to the feeding opening. A shoulder belt portion of the seat belt capable of restraining the front side of the upper body of an occupant is provided from the buckle to one side of the seat portion in the left-right direction on the feed-out port side, from the exit portion to the buckle. The portion up to the fixed end side of the seat belt is configured to be attached to the occupant seated on the seat as a lap belt portion of the seat belt capable of restraining the front side of the waist of the occupant;
An occupant protection device in which an airbag that is folded and assembled into the lap belt portion is folded and inflated to receive the upper body of an occupant by causing inflation gas to flow into the lap belt portion when activated,
The opening direction of the feeding port is such that the seatbelt is directed diagonally forward so that the tongue is fastened to the buckle, from a front direction in which the seatbelt can be fed out forward. It is characterized in that it is attached to the mounting base of the backrest portion so as to be rotatable in directions within an angular range of up to an oblique direction in which it can be extended.

In the occupant protection device according to the present invention, when the seatbelt is worn, when the seatbelt is let out diagonally forward and downward on the buckle side so as to fasten the tongue to the buckle, the seatbelt allows the seatbelt to open the forward-opening opening. The circumferential edge of the seat belt is pushed, the outlet part rotates, and the outlet is directed diagonally forward toward the buckle side. This allows the seat belt to be smoothly extended and the tongue to be fastened to the buckle easily and quickly. Thereafter, when the tongue is removed from the buckle, the seatbelt is wound toward the delivery port side by the operation of the winding device and returns to its initial forward state. At this time, even if the seatbelt is directed diagonally forward from the outlet to the buckle side when the tongue is first removed, the seatbelt presses against the periphery of the outlet to rotate the outlet. It is possible to smoothly and quickly wind up and return to the forward facing initial state while rotating the outlet part while suppressing interference with the paper.

Therefore, in the occupant protection device according to the present invention, the seatbelt to which the airbag is attached can be smoothly and quickly taken in and out of the outlet.

Further, in the occupant protection device according to the present invention, the feeding port portion may include:
a vertical insertion portion through which a portion of the seat belt extending upward from the winding device is inserted;
a horizontal insertion part extending forward from the vertical insertion part so as to allow the seat belt to be inserted forward from the upper end of the vertical insertion part, and having the feeding port disposed at the front end;
In addition to providing
The seatbelt is disposed on the edge of the feedout port side on the inner peripheral surface side of the intersection of the vertical insertion portion and the horizontal insertion portion, and is bent toward the feedout port side of the seat belt extending upward from the winding device. a belt support portion that slidably supports the inner peripheral surface side of the bent portion;
Equipped with
The vertical insertion portion is attached to the mounting base so as to be rotatable about a rotation axis extending substantially in the vertical direction,
It may also be configured such that it is arranged.

In such a configuration, in the initial state, the seat belt extending upward from the retractor rises within the vertical insertion part of the delivery port, contacts the inner circumferential surface side with the belt support part, and moves forward. It is bent and extends forward from the outlet at the tip of the horizontal insertion part. When the seatbelt is worn, when the seatbelt is fed out diagonally forward in order to fasten the seatbelt tongue to the buckle side, the belt supporting part that slides on the seatbelt and the periphery of the feeding opening are exposed to the seatbelt. Since the seat belt is pushed by the seat belt, the outlet portion rotates with respect to the mounting base while responding to the direction in which the seat belt is fed out, which changes from forward to obliquely forward, while suppressing the sliding resistance of the seat belt. Thereafter, when removing the tongue, the belt supporting part and the periphery of the outlet are pushed while sliding the seatbelt being wound up, and the outlet rotates to initialize the seatbelt. can be returned to the state. In addition, since the belt support section supports the inner circumferential surface side of the bent portion of the seatbelt, that is, the front side, even if a load is applied to the seatbelt due to the forward movement of the occupant in the event of a vehicle collision, To stably support a seat belt and not impede the occupant restraint performance of the seat belt.

1 is a schematic perspective view of an occupant protection device that is an embodiment of the present invention. FIG. 2 is a schematic perspective view of the occupant protection device according to the embodiment, with a seat belt shown by a two-dot chain line. FIG. 2 is a schematic left side view of the occupant protection device according to the embodiment. FIG. 2 is a schematic plan view showing the vicinity of the outlet portion of the occupant protection device according to the embodiment. FIG. 5 is a schematic vertical cross-sectional view showing the vicinity of the outlet portion of the occupant protection device according to the embodiment, and corresponds to the section VV in FIG. 4. FIG. 6 is a schematic cross-sectional view showing the vicinity of the outlet portion of the occupant protection device according to the embodiment, and corresponds to the section VI-VI in FIG. 5. FIG. FIG. 2 is a schematic cross-sectional view of the vicinity of the outlet portion, illustrating a state in which the seat belt is shifted from an initial state to a fastened state in the occupant protection device of the embodiment. FIG. 2 is a schematic front view of the occupant protection device according to the embodiment in a state where the occupant is wearing a seat belt. FIG. 2 is a schematic left side view of the occupant protection device according to the embodiment in a state in which a seat belt is attached to an occupant, and more specifically, it is a schematic left side view in a state in which a pretensioner mechanism of a winding device is activated. FIG. 2 is a schematic perspective view showing an inflated state of an airbag in the occupant protection device of the embodiment. FIG. 2 is a schematic left side view of the occupant protection device according to the embodiment when it is in operation.

Hereinafter, one embodiment of the present invention will be described based on the drawings. As shown in FIGS. The seat 1 includes a seat 1 having a backrest 2, a seatbelt device 20 assembled to the seat 1, and an airbag device 60. The backrest portion 2 of the seat 1 includes a main body portion 3 having a substantially rectangular plate shape and a headrest portion 4 assembled to an upper end 3t of the main body portion 3.

As shown in FIGS. 1, 3, 8, 9, and 11, the airbag device 60 includes a bag assembly 66 that is assembled to the attachment portion 37 of the lap belt portion 30 of the seatbelt 25 of the seatbelt device 20, and The inflator 62 supplies inflation gas to the airbag 70 of the assembly 66.

The inflator 62 includes a substantially cylindrical inflator main body 63 that discharges inflation gas, and a pipe portion 64 that protrudes from the inflator main body 63 and is bent into a substantially L-shape. (See Figures 1 and 3). A tip 87a of a gas supply path section 85 of the airbag 70, which will be described later, is covered with the pipe section 64, and is connected to the pipe section 64 by being tightened with a clamp 65.

The bag assembly 66 includes an airbag 70, a bag connecting portion 89, and a bag cover 91, and furthermore, in the case of the embodiment, the airbag 70 and the inflator 62 are connected to each other for inflation from the inflator 62. It is configured to include a gas supply passage section 85 that supplies gas to the airbag 70 (see FIGS. 8 to 10).

As shown in FIGS. 10 and 11, the airbag 70 has a structure in which the peripheral wall 71 inflates into a substantially triangular prism shape when viewed from the side, and includes a bottom wall portion 72 on the bottom side and a rear wall portion on the rear side. 73, a front wall portion 74 on the front side, and left and right side wall portions 75 (L, R). When the airbag 70 is fully inflated, the lower surface 72a side of the bottom wall portion 72 serves as a support surface 77 that is supported by the thigh MF of the occupant MP, and the rear surface 73a side of the rear wall portion 73 serves as a support surface 77 for supporting the occupant MP who is moving forward. The occupant restraining surface 78 receives the upper body MU of the MP.

In the vicinity of the rear edge 72b of the bottom wall portion 72, an inlet portion 80 having a plurality of inlet ports 80a through which inflation gas flows from the gas supply path portion 85 is provided. Further, a vent hole 82 is opened at the front side of the left and right side walls 75L, 75R to exhaust the surplus of the inflation gas flowing into the airbag 70.

Note that the airbag 70, together with the gas supply path section 85 and the bag connection section 89, is formed from a woven fabric such as polyester.

The gas supply path section 85 includes a bag side section 86 connected to the airbag 70 and a cylindrical gas flow path section 87 extending from the bag side section 86 toward the inflator 62 (Fig. 9 reference). As described above, the gas flow path section 87 has its tip 87a connected to the pipe section 64 of the inflator 62. A communication port 86a that communicates with the inflow port 80a of the inflow port 80 of the airbag 70 is provided in the bag side portion 86, and the periphery of the communication port 86a is sewn to the periphery of the inflow port 80a, and the communication port 86a is connected to the bag side. The portion 86 is connected to the rear edge 72b side of the bottom wall portion 72, which is the lower end 70a of the airbag 70.

The bag connecting part 89 connects the folded airbag 70 to the lap belt part 30 so as to be slidable along the lap belt part 30, and has a cylindrical shape, and in the case of the embodiment, the bag connecting part 89 is configured to connect the folded airbag 70 to the lap belt part 30 so as to be slidable along the lap belt part 30. The road portion 85 is connected to the lower surface 72a side of the airbag 70 with a bag side portion 86 interposed therebetween.

The bag cover 91 is arranged in a cylindrical shape so as to cover the folded airbag 70 and the assembly portion 37 of the airbag 70 in the lap belt portion 30 such that the airbag 70 can protrude when inflated. (See Figure 8). In the case of the embodiment, the bag cover 91 further covers the bag side portion 86 of the gas supply path portion 85 connected to the airbag 70 and the bag connecting portion 89. This bag cover 91 is different from the material of the airbag 70 and the like, and is made of a fabric similar to that used for the seat material of the seat 1 so as not to reduce the design.

In addition, when assembling the bag assembly 66 to the lap belt part 30, first, the gas supply passage part 85 to which the bag connecting part 89 is connected before being shaped into a cylinder is connected to the air bag 70, and the air Fold the bag 70. Next, the assembly portion 37 of the lap belt portion 30 is wrapped around the bag connecting portion 89 before being formed into a cylindrical shape, thereby forming the bag connecting portion 89 into a cylindrical shape. Then, if the folded airbag 70 and the like are wrapped together with the lap belt part 30 of the attachment part 37 and the bag cover 91 is formed into a cylindrical shape, the bag assembly 66 can be wrapped in the assembly part 30 of the lap belt part 30. 37 and can be assembled and covered with a bag cover 91.

Furthermore, when the bag assembly 66 is assembled to the lap belt section 30, when the seat belt 25 is attached to the occupant MP, the passenger side surface 30a side of the lap belt section 30 is connected to the bag connecting section 89 and the bag cover 91. The airbag 70 is disposed on the side of the abdomen MB of the occupant MP, and the airbag 70 is connected to the bag side portion 86 of the gas supply passage portion 85 covered by the bag cover 91 on the opposite side surface 30b of the lap belt portion 30. The assembly main body 66a side of the bag assembly 66 will be disposed. When the seatbelt 25 is not worn and is wound up by the winding device 22 (described later), the side surface 30b of the lap belt section 30 opposite to the occupant faces the front surface 3f side of the backrest section 2, and the bag assembly The assembly main body 66a side of the body 66 is brought into contact with the front surface 3f side.

The seatbelt device 20 fastens together a belt-shaped seatbelt 25 made of polyester fiber or the like with good sliding performance, a retractor 22 for winding the seatbelt 25, and a tongue 34 attached to the seatbelt 25. It is configured to include a buckle 33 and a feed-out port 40 that allows the seat belt 25, which is fed upward from the winding device 22, to feed out in a forward direction (see FIGS. 1 to 6).

The winding device 22 is disposed within the main body 3 of the backrest 2 of the seat 1 and is held by the seat frame 6, and if the seat belt 25 is suddenly pulled out, the winding device 22 stops the pulling out, and further, A pretensioner mechanism 23 is provided that can retract the pulled out seat belt 25 in the event of a vehicle collision or the like. The pretensioner mechanism 23 is a general-purpose one that operates a built-in gas generator to rotate the shaft around which the seat belt 25 is wound, thereby instantly retracting the seat belt 25. Note that the winding device 22 activates the pretensioner mechanism 23 in the event of a vehicle collision, but the inflator 62 that supplies inflation gas to inflate the airbag 70 is delayed for about 5 ms after the pretensioner mechanism 23 is activated. It is activated. Such a delay is caused by inflating the airbag 70 after the occupant MP seated in the seat 1 activates the pretensioner mechanism 23 to wind up the seatbelt 25 to stabilize the seating state in the seat 1. This is to ensure that the inflated airbag 70 accurately protects the occupant MP. That is, in the occupant protection device MS of the embodiment, the pretensioner mechanism 23 is activated immediately before the airbag 70 is inflated so that the occupant MP is placed in the center position in the left-right direction of the inflating airbag 70. The occupant MP is placed in an appropriate seating position.

The seat belt 25 is made to protrude from the outlet 45 of the outlet part 40 with the portion facing the winding device 22 being the upper end 25a side. The seat belt 25 is disposed with a lower end 25b as a fixed end fixed to an anchor member 31 disposed on the left side 18a of the seat 18 of the seat 1. The anchor member 31 is disposed on the left side portion 18a of the seat portion 18 on the left side where the outlet portion 40 of the backrest portion 2 is provided.

Further, a tongue 34 is disposed on the seat belt 25, and the tongue 34 is fastened to a buckle 33 disposed on the right side 18b of the seat portion 18 of the seat 1, which is opposite to the outlet portion 40 side. becomes. In the seat belt 25 with the tongue 34 fastened to the buckle 33, the portion extending from the tongue 34 toward the outlet portion 40 is the shoulder belt portion 29 disposed on the front side of the upper body MU of the occupant MP, and the tongue 34 is fastened to the buckle 33. A portion extending from 34 toward the fixed end 29b is a lap belt portion 30 disposed on the front side of the waist MW of the occupant MP. Note that the buckle 33 is provided with a release button (not shown), and when unfastening the fastened tongue 34, the tongue 34 can be removed from the buckle 33 by pressing the release button.

The tongue 34 includes an insertion ring portion 34 a through which the seat belt 25 is inserted, and a locking portion 34 b that projects forward from the insertion ring portion 34 a and can be fastened to the buckle 33 .

Note that a tongue stopper 35 is provided on the seat belt 25 to prevent the tongue 34 from falling.

As shown in FIGS. 1 to 4, the outlet 40 is disposed above the winding device 22, that is, on the upper left end 3tL side of the upper end 3t of the main body 3 of the backrest 2. is a rectangular opening slightly larger than the cross-sectional shape of the seat belt 25 and extending in the left-right direction, and is opened forward so that the seat belt 25 can be pulled out forward. The feeding port part 40 changes the opening direction OD of the feeding port 45 from at least a forward direction FD in which the seat belt 25 can be fed out forward, and a diagonally forward direction in which the seat belt 25 is fastened to the buckle 33 so that the tongue 34 is fastened to the buckle 33. It is attached to the mounting base 8 of the backrest part 2 so as to be rotatable in the direction within the angular range up to the diagonal direction CD in which it can be extended toward.

Specifically, the outlet portion 40 is configured to include a vertical insertion portion 42 and a horizontal insertion portion 44, as shown in FIGS. 4 to 6. The vertical insertion portion 42 has a cylindrical shape with a vertical hole 42a extending in the vertical direction, and allows a portion 26 of the seat belt 25 extending upward from the winding device 22 near the winding device 22 to be inserted therethrough. The horizontal insertion part 44 has a generally cylindrical shape and has a horizontal hole 44a extending forward in a substantially orthogonal direction from the vertical insertion part 42 so that the seat belt 25 is inserted forward from the upper end of the vertical insertion part 42. An outlet 45 is provided.

A belt support portion 48 is disposed at the edge of the inner peripheral surface side of the intersection portion (intersection portion) 47 between the vertical insertion portion 42 and the horizontal insertion portion 44 on the outlet 45 side. The belt support portion 48 slidably supports the inner circumferential surface 27a side of the bent portion 27 of the seat belt 25 extending upward from the winding device 22 and bent toward the outlet 45 side. The sliding surface 48 a of the belt support portion 48 that slides on the seat belt 25 is disposed along the width direction of the seat belt 25 so as to be orthogonal to the seat belt 25 , and is arranged along the width direction of the seat belt 25 at the bent portion 27 . It is arranged so that it slides over the entire area. Further, the vertical insertion portion 42 is attached to the mounting base 8 so as to be rotatable about a rotation axis C that extends substantially in the vertical direction.

This vertical insertion part 42 has a flange part 42c protruding from the lower end of the outer circumferential surface 40b, and the outer circumferential surface 40b and the lower end surface 42d are slidable on the shaft support 10 of the mounting base 8 so as to be rotatable. , is assembled to the shaft support 10.

A mounting base 8 disposed on the backrest portion 2 of the seat 1 is fixed to the seat frame 6 above the winding device 22, and is provided with an insertion hole 9 that penetrates approximately in the vertical direction. A shaft support 10 is disposed on the upper edge of the hole 9. The shaft support 10 includes a sliding hole 10a that rotatably supports the outer peripheral surface 42b of the vertical insertion portion 42, and a support seat 10b that rotatably supports the lower end surface 42d of the vertical insertion portion 42. has been done. A retaining portion 10c that prevents the collar portion 42c of the vertical insertion portion 42 from coming off upward is provided near the outer peripheral edge of the support seat 10b.

The mounting base 8 is made of metal and is constructed by joining divided bodies 8a and 8b, which are divided into two large and small parts around the insertion hole 9, to each other. The divided bodies 8a and 8b are provided with flange portions 8c and 8c that protrude in the radial direction of the insertion hole 9, and the bolt 12 is inserted into the mounting hole 8d provided in the flange portion 8c by overlapping the flange portions 8c and 8c. The mounting base 8 is formed by fastening a nut 13 to the bolt 12 inserted therethrough.

Note that the outer circumferential surface 42b and lower end surface 42d of the vertical insertion part 42 of the outlet part 40, which are the sliding parts between the sliding hole 10a and the support seat 10b, are made of a fluororesin material or the like that can ensure good sliding. Sliding materials 57 and 58 are provided.

In the case of the embodiment, the outlet portion 40 includes a main body portion 50 made of a rigid metal material such as steel, and a cover material 55 made of a synthetic resin such as polypropylene.

The main body portion 50 includes a substantially rectangular plate-shaped plate portion 51, an annular portion 52 that forms the opening periphery of the outlet 45 together with the plate-shaped portion 51, and a substantially cylindrical portion that protrudes downward from the lower surface side of the plate-shaped portion 51. A cylindrical portion 53 is provided. The cylindrical portion 53 constitutes the vertical insertion portion 42 . Further, in a region of the plate-shaped portion 51 surrounded by the cylindrical portion 53, a slit-shaped insertion opening 51a and a semicircular arc-shaped opening 51c are provided. The insertion opening 51a allows the portion 26 of the seat belt 25 near the retractor 22 to be inserted therethrough, and has a rectangular shape slightly larger than the cross-sectional shape of the seat belt 25. The edge 51b of the insertion opening 51a on the outlet 45 side constitutes a belt support portion 48 that supports the bent portion 27 of the seat belt 25. The outer peripheral surface of the belt support portion 48 serves as a sliding surface 48a that slides on the inner peripheral surface 27a of the bent portion 27 of the seat belt 25.

The cover material 55 is formed in a substantially box shape to cover the plate-like part 51 of the main body part 50, and has an engaging edge 55a on the outer periphery that is engaged with a locking edge 51d on the outer periphery of the plate-like part 51. It is arranged as follows. A plurality of stoppers 55b are arranged on the inner peripheral side of the cover material 55, and come into contact with the upper surface side of the plate-shaped portion 51 when the engagement edge 55a is engaged with the engagement edge 51d. Further, the cover material 55 is provided with an opening 55c for the outlet 45 when the cover material 55 is locked to the plate-like portion 51.

In the occupant protection device MS of the embodiment, when assembling the seat 1, the seat belt 25 extending from the retracting device 22 is attached to the mounting base 8 before and after the retracting device 22 and the mounting base 8 are fixed to the seat frame 6 as appropriate. It is inserted through the insertion hole 9 and through the insertion opening 51a and the opening 55c before the cover material 55 is locked to the main body part 50, and is fastened to the anchor member 31 while assembling the tongue 34 and the tongue stopper 35. . Then, while assembling the mounting base 8 using the bolts 12 and nuts 13, the cylindrical portion 53 of the outlet portion 40 is pivotally supported by the shaft support 10 of the mounting base 8, and the cover material 55 is engaged with the main body portion 50. By matching them, the outlet portion 40 can be attached to the upper left end 3tL of the backrest portion 2 of the seat 1. Note that the cushion portion 15 and the skin material 16 of the seat 1 are disposed using the seat frame 6 or the like as appropriate before and after the outlet portion 40 is attached.

Further, in the occupant protection device MS of the embodiment, after the seat 1 is mounted on the vehicle and the seat belt 25 is arranged on the seat 1, the above-mentioned assembly portion 37 of the lap belt portion 30 of the seat belt 25 is attached. As shown in FIG. The protection device MS can be mounted on the vehicle.

In the occupant protection device MS of the embodiment, when the seatbelt 25 is worn, the seatbelt 25 is let out diagonally forward and downwardly toward the buckle 33 side (diagonally rightwardly downwardly) so that the tongue 34 is fastened to the buckle 33. As shown in FIGS. 7A, B, and C, the seatbelt 25 pushes the right edge 46a of the peripheral edge 46 of the forward-facing outlet 45, causing the outlet 40 to move to the right. Then, the outlet 45 is directed diagonally forward toward the buckle 33 side, and resistance due to catching or friction between the seatbelt 25 and the peripheral edge 46 of the outlet 45 is suppressed, and the seatbelt is smoothly tightened. 25, and the tongue 34 can be fastened to the buckle 33 easily and quickly.

After that, when the tongue 34 is removed from the buckle 33, the seatbelt 25 is wound up toward the outlet 40 side by the operation of the winding device 22, and the seat belt 25 is rotated forward as shown in C, B, and A of FIG. Trying to return to the initial state. At that time, even if the seat belt 25 is directed diagonally forward from the outlet 40 toward the buckle 33 as shown in FIG. 46b, etc., to rotate the outlet part 40 to the left, that is, to suppress interference with the peripheral edge 46 of the outlet 45, and rotate the outlet part 40 to the left, so that the winding is smoothly and quickly. As a result, the state shown in FIG. 7B can be returned to the initial state shown in FIG. 7A in the forward direction.

Therefore, in the occupant protection device MS of the embodiment, the seatbelt to which the airbag is attached can be smoothly and quickly taken in and out of the outlet.

Of course, when the seatbelt is fed out from the initial state to the fastened state without rotating the feeding port, that is, by widening the opening width in the left and right direction of the feeding port, the seatbelt may be fed out from the initial state to the fastened state. It is also possible to configure it so that it does not interfere with the periphery of the outlet. However, in such a case, since the outlet is wide open, there is a risk that foreign matter may enter the winding device side of the backrest through the outlet, causing a malfunction of the winding device, etc. , undesirable. Furthermore, in such a case, the planar shape of the outlet itself becomes large, which degrades the appearance design of the backrest of the seat, which is undesirable from the design point of view. The outlet portion 40 can be made smaller and is also preferable in terms of design.

In the embodiment, the feeding port 40 includes a vertical insertion portion 42 through which the vicinity portion 26 of the seat belt 25 extending upward from the winding device 22 is inserted, and a vertical insertion portion 42 through which the seat belt 25 is inserted forward from the upper end of the vertical insertion portion 42. The horizontal insertion part is disposed so as to extend forward from the vertical insertion part 42, and has a feeding port 45 disposed at the front end thereof. Further, the feeding port 40 is disposed at the edge on the feeding port 45 side of the inner peripheral surface side of the intersection 47 between the vertical insertion portion 42 and the horizontal insertion portion 44, and extends upward from the winding device 22 for the seat belt. A belt support portion 48 is provided to slidably support the inner circumferential surface 27a side of the bent portion 27 bent toward the outlet 45 side at the belt 25. The outlet portion 40 is arranged such that the vertical insertion portion 42 is rotatably attached to the mounting base 8 about a rotation axis C that extends substantially in the vertical direction.

Therefore, in the embodiment, the seat belt 25 extending upward from the take-up device 22 rises in the vertical insertion part 42 of the feeding outlet part 40 in the initial state, and then passes the inner peripheral surface 27a side to the belt support part 48. They are brought into contact with each other, bent forward, and extended forward from the outlet 45 at the tip of the horizontal insertion portion 44 (see FIGS. 4 and 5). When the seatbelt 25 is worn, when the seatbelt 25 is let out diagonally forward in order to fasten the tongue 34 of the seatbelt 25 to the buckle 33 side, the belt support portion 48 that slides on the seatbelt 25 Since the right edge 46a of the peripheral edge 46 of the outlet 45 is pressed by the seat belt 25 (see A to C in FIG. 7), the outlet 40 changes from forward to obliquely forward with respect to the mounting base 8. The seat belt 25 rotates in the right direction while suppressing the sliding resistance of the seat belt 25 while corresponding to the direction in which the seat belt 25 is fed out. Thereafter, when removing the tongue 34, as an operation in the opposite direction, the belt support portion 48 and the left edge 46b of the peripheral edge 46 of the outlet 45 are pushed while sliding the seat belt 25 to be wound up. The portion 40 can be rotated to the left to return the seat belt 25 to its initial state. Further, since the belt support portion 48 supports the inner circumferential surface 27a side of the bent portion 27 of the seat belt 25, that is, the front side, the belt support portion 48 supports the seat belt 25 when the occupant MP moves forward in the event of a vehicle collision. Even when a load is applied, the seat belt 25 can be stably supported and the occupant restraint performance of the seat belt 25 is not impaired.

In the occupant protection device MS of the embodiment, when the airbag device 60 is activated while the occupant MP seated on the seat 1 is wearing the seatbelt 25, the folded airbag 70 causes inflation gas to flow into the airbag 70. The bag cover 91 is opened and inflated, and the supporting surface 77 is supported on the thigh MF of the occupant MP, and the occupant restraining surface 78 is smoothly moved so as to cover the front side of the upper body MU of the occupant MP. , to complete the expansion (see FIG. 11). Incidentally, before the airbag device 60 is activated, the pretensioner mechanism 23 of the retractor 22 of the seatbelt device 20 is activated, so the seatbelt 25 is retracted a predetermined distance and the lap belt portion 30 is retracted. is pushed into the abdomen MB side of the occupant MP (see the solid line from the two-dot chain line to the solid line in FIG. 9).

Further, in the embodiment, the winding device 22, the feeding port 40, the fixed end 25b of the seat belt 25, the inflator 62 of the airbag device 60, etc. are arranged on the left side of the backrest portion 2 of the seat 1. The arrangement may be reversed.

Further, in the embodiment, the opening direction OD of the outlet portion 40 is rotated by about 40 degrees from the forward direction FD in the initial state to the diagonal direction CD in the fastened state of the seat belt 25. The rotation angle θ of the opening direction OD of the outlet portion 40 is set so that the rotation angle θ is greater than the angle from the initial state to the fastened state of the seat belt 25, and the degree of freedom of movement of the tongue 34 held when the tongue 34 is attached to the buckle 33 is determined. , may be improved.

DESCRIPTION OF SYMBOLS 1...Seat, 2...Backrest part, 3t...Top end, 3tL...Top left end, 8...Mounting base, 18...Seat part, 20...Seatbelt device, 22...Rewinding device, 25...Seatbelt, 26...(Rewinding) 27... Bent part, 27a... Inner peripheral surface, 29... Shoulder belt part, 30... Lap belt part, 33... Buckle, 34... Tongue, 40... Outlet part, 42... Vertical insertion part, 44 ... Lateral insertion part, 45... Outlet, 46... Peripheral edge, 47... Intersection part, 48... Belt support part, 60... Air bag device, 66... Bag assembly, 70... Air bag,
OD...opening direction, C...rotation axis, MS...occupant protection device, MP...occupant, MW...waist, MU...upper body.

Claims (2)

In a seat having a seat part and a backrest part, a feeding outlet is opened at one upper end in the left and right direction of the backrest part so that a seat belt extending from a winding device disposed in the backrest part can be fed out to the front side. A feeding outlet portion is provided;
The seatbelt is wound by fastening the tongue of the seatbelt fed out from the feeding opening to a buckle disposed on the other side of the seat in the left-right direction opposite to the feeding opening. A shoulder belt portion of the seat belt capable of restraining the front side of the upper body of an occupant is provided from the buckle to one side of the seat portion in the left-right direction on the feed-out port side, from the exit portion to the buckle. The portion up to the fixed end side of the seat belt is configured to be attached to the occupant seated on the seat as a lap belt portion of the seat belt capable of restraining the front side of the waist of the occupant;
An occupant protection device in which an airbag that is folded and assembled into the lap belt portion is folded and inflated to receive the upper body of an occupant by causing inflation gas to flow into the lap belt portion when activated,
The opening direction of the feeding port is such that the seatbelt is directed diagonally forward so that the tongue is fastened to the buckle, from a front direction in which the seatbelt can be fed out forward. The occupant protection device is mounted to the mounting base of the backrest portion so as to be rotatable in directions within an angular range of up to an oblique direction in which the passenger protection device can be extended. The feeding outlet portion is
a vertical insertion portion through which a portion of the seat belt extending upward from the winding device is inserted;
a horizontal insertion part extending forward from the vertical insertion part so as to allow the seat belt to be inserted forward from the upper end of the vertical insertion part, and having the feeding port disposed at the front end;
In addition to providing
The seatbelt is disposed on the edge of the feedout port side on the inner peripheral surface side of the intersection of the vertical insertion portion and the horizontal insertion portion, and is bent toward the feedout port side of the seat belt extending upward from the winding device. a belt support portion that slidably supports the inner peripheral surface side of the bent portion;
Equipped with
The vertical insertion portion is attached to the mounting base so as to be rotatable about a rotation axis extending substantially in the vertical direction,
The occupant protection device according to claim 1, further comprising a passenger protection device.

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