JP7327348B2 - vehicle seat belt device - Google Patents

Description

The present invention relates to a seatbelt device provided in a vehicle.

Japanese Laid-Open Patent Application Publication No. 2002-200002 discloses a seatbelt device of this type that is applied to a rear seat of a vehicle. This seatbelt device includes a guide portion for guiding the seatbelt pulled out from the retractor. According to this seatbelt device, it is possible for an occupant seated in the seat to wear the seatbelt properly.

JP 2011-178288 A

By the way, in recent years, due to the diversification of the uses of automobiles, there is a need for the design of passenger seats and rear seats in consideration of specific conditions in addition to the driver's seats. One of them is a structure that allows the occupant to sit not only in a standard posture but also in a comfortable posture in which the seat is tilted backward. The comfortable posture is a sitting posture that is assumed to allow the occupant to spend time comfortably in a relaxed state. However, in the comfortable posture, the shoulder portion of the seat belt is likely to separate from the occupant's body and float away, obstructing the occupant's field of vision and hindering the occupant's movement. For this reason, although the occupant has taken a comfortable posture, there may arise a problem that comfort, which is the original purpose of the occupant, is impaired.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and it is an object of the present invention to provide a seat belt device for a vehicle that can ensure comfort when the occupant assumes a comfortable posture.

One aspect of the present invention is
A vehicle seat belt device provided in a vehicle,
A seat belt that spans the occupant seated on the seat,
a retractor that is provided behind the seat and winds the seat belt so that it can be pulled out;
a first guide portion that guides the seat belt pulled out from the retractor;
a second guide portion provided on a side wall portion of the vehicle in front of the first guide portion and guiding the seat belt between the first guide portion and the occupant;
with
The second guide portion is provided with an insertion opening through which the seat belt is inserted along the vehicle length direction with the belt width direction as the vehicle height direction, and the opening width of the insertion opening in the vehicle height direction is The vehicle has a size that exceeds the belt width of the seat belt and allows the seat belt to slide in the vehicle height direction following the tilting motion of the seat back of the seat from the standard posture position to the comfortable posture position. seat belt device for
It is in.

In this vehicle seatbelt device, a seatbelt pulled out from a retractor provided behind the seat is passed over the occupant seated on the seat through the first guide portion and the second guide portion in sequence. In the second guide portion, the seat belt is inserted through the insertion opening along the vehicle length direction with the belt width direction as the vehicle height direction. At this time, by providing the second guide portion on the side wall portion of the vehicle, the seat belt can be guided from the first guide portion to the occupant along a route that does not easily interfere with the seat back.

Here, the opening width of the insertion opening in the vehicle height direction exceeds the belt width of the seat belt, and the seat belt width in the vehicle height direction follows the tilting movement of the seat back of the seat from the standard posture position to the comfortable posture position. It is sized to allow sliding. Therefore, it is possible to prevent the seat belt from being lifted up from the occupant even when the occupant takes a comfortable posture.

As described above, according to the above aspect, it is possible to provide a vehicle seat belt device that can ensure comfort when the occupant assumes a comfortable posture.

FIG. 2 is a side view of the vehicle seat belt device of Embodiment 1 as seen from the passenger compartment side when the occupant is in a standard posture; The figure which shows typically a mode that the vehicle seatbelt apparatus of FIG. 1 was seen from upper direction. The figure which shows the III-III arrow directional cross section of FIG. The figure which shows the state before assembly|attachment of a 2nd guide part in FIG. 1 is a side view of the vehicle seat belt device of Embodiment 1 as seen from the passenger compartment side when the occupant is in a comfortable posture; FIG. The figure which shows the VI-VI arrow directional cross section of FIG. The side view which looked at the vehicle seatbelt apparatus of Embodiment 2 from the passenger compartment side when the passenger|crew is in a standard posture. The figure which shows the VIII-VIII arrow cross section of FIG.

Preferred embodiments of each of the above aspects are described below.

In the vehicle seat belt device, the second guide portion has the insertion opening at a detour position closer to the side wall portion than the virtual seat belt path connecting the first guide portion and the outer wall portion of the seatback. is preferred.

According to this seatbelt device, by arranging the insertion opening of the second guide portion at the detour position, the seatbelt is guided from the first guide portion to the occupant along a route that is less likely to interfere with the seatback than the virtual seatbelt route. be able to.

In the vehicle seat belt device described above, the side wall portion is provided with an opening, and the second guide portion includes a belt holding portion forming the insertion opening and a belt holding portion sandwiching the belt holding portion in the vehicle height direction. each of the two fixed portions straddling the opening is fixed to the side wall portion.

According to this seat belt device, since the second guide portion for guiding the seat belt is fixed to the side wall portion across the opening, the second guide portion also serves as a means for increasing the rigidity of the side wall portion around the opening. be able to. At this time, the load that the seat belt receives from the occupant is distributed from the seat side to the vehicle side via the second guide portion, so that the rigidity of the seat itself can be suppressed, thereby reducing the weight of the vehicle.

In the vehicle seat belt device described above, it is preferable that the second guide portion includes a low-rigidity portion having relatively low rigidity in the belt holding portion and the two fixed portions.

According to this seatbelt device, when the belt holding portion receives a load from the seatbelt, the second guide portion can be flexurally deformed preferentially at the low-rigidity portion to absorb the load.

In the vehicle seat belt device described above, the second guide portion includes a first member integrated with the belt holding portion, and a second member including the two fixed portions. Preferably, the member and the second member are separably connected.

According to this seatbelt device, the first member and the second member of the second guide portion can be fixed to the side wall portion of the vehicle while being connected in an appropriate order from the state in which they are separated from each other. Thereby, it is possible to improve the operability when fixing the second guide portion to the side wall portion of the vehicle.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicle seatbelt device (hereinafter also simply referred to as a "seatbelt device") provided in a vehicle will be described below with reference to the drawings.

In the drawings for explaining the seat belt device, unless otherwise specified, the front of the vehicle is indicated by an arrow FR, the upper side of the vehicle is indicated by an arrow UP, and the outer side of the vehicle is indicated by an arrow OUT. An arrow X indicates the vehicle height direction, an arrow Y indicates the vehicle length direction, and an arrow Z indicates the vehicle width direction.

(Embodiment 1)
As shown in FIG. 1, a vehicle body frame 2a forming a side wall portion 2 of a vehicle 1 includes a C-pillar 3 and a D-pillar 4. As shown in FIG. An opening 5 forming a window is provided between the C-pillar 3 and the D-pillar 4 .

The seat 20 is a seat for the rear seat of the vehicle 1, and includes a seat back 21 that forms a backrest for the occupant C, and a seat cushion 22 that forms a seating surface for the occupant C. The seat back 21 is configured to be rotatable in a tilting region A around the shaft portion 23 with respect to the seat cushion 22 . Therefore, the occupant C can take the standard posture when the seat back 21 is at the first position P1 (the position indicated by the solid line in FIG. 1), which is the standard posture position. Further, the occupant C can take a comfortable posture when the seat back 21 is at the second position P2 (the position indicated by the two-dot chain line in FIG. 1), which is the comfortable posture position behind the first position P1. can.

The "standard posture" as used herein refers to a posture when the occupant C is seated on the seat 20 in a standing state with the seat back 21 raised. This standard posture typically refers to a posture in which the angle of inclination of the seat back 21 or the torso of the occupant C with respect to the vertical is in the range of about 20° to 25°.

On the other hand, the "comfortable posture" refers to the posture when the occupant C is seated on the seat 20 with the seat back 21 tilted rearward from the upright state. In particular, this comfortable posture is a sitting posture assuming that the occupant C can spend a comfortable time in a relaxed state. , to an angle of around 50°.

The seatbelt device 10 of Embodiment 1 includes a seatbelt B, a retractor 30 , a first guide portion 31 and a second guide portion 32 .

The seat belt B is constructed as an elongated webbing that is stretched over the occupant C seated on the seat 20 . A plate-shaped tongue 11 is slidably attached to the first region B1 of the seat belt B. As shown in FIG. This tongue 11 can be engaged and disengaged with a buckle 12 provided on the seat 20 side.

When the occupant C wears the seat belt B, the tongue 11 and the buckle 12 are engaged. When the seat belt B is worn, the occupant C can be restrained by the first region B1 of the seat belt B coming into close contact with the area from the chest to the shoulder of the occupant C. On the other hand, the occupant C releases the engagement between the tongue 11 and the buckle 12 when releasing the seat belt B from being worn. When the seat belt B is released, the restraint of the occupant C is released.

The retractor 30 is for retracting the seat belt B so that it can be pulled out. Although not shown, the retractor 30 is configured to house a spool forming a winding shaft for the seat belt B and a belt winding mechanism that biases the spool in the winding direction. . In this embodiment, the retractor 30 is provided behind the seat 20 in the vehicle. More specifically, the retractor 30 is fixed to the D-pillar 4 of the side wall portion 2 which is located behind the tilting region A of the seat back 21 in the vehicle.

The seat belt B pulled out from the retractor 30 is guided by the first guide portion 31 and further guided by the second guide portion 32 between the first guide portion 31 and the occupant C. As shown in FIG. The other end of the seat belt B opposite to the one end on the retractor 30 side is connected to a belt anchor 13 (see FIG. 2) provided on the seat 20 .

The first guide portion 31 is for guiding the seat belt B pulled out from the retractor 30 above the retractor 30 . This first guide portion 31 is fixed above the retractor 30 in the D-pillar 4 . The first guide portion 31 is provided with an insertion hole 31a through which a second region B2 of the seat belt B extending from the first guide portion 31 to the shoulder of the occupant C is inserted.

The insertion hole 31a is sized so that the width of the hole is approximately the same as the belt width d1 of the seat belt B. As shown in FIG. That is, the hole width of the insertion hole 31a is the same as the belt width d1 of the seat belt B or slightly exceeds the belt width d1. Therefore, the seat belt B is allowed to slide in the belt length direction while being inserted into the insertion hole 31a, but is restricted from sliding in the belt width direction. Such a first guide portion 31 is also called a "slip joint".

The first guide portion 31 is arranged at a position such that the seat belt B does not rise from the occupant C when the seat back 21 tilts in the range from the first position P1 to the second position P2. Typically, when the seat back 21 is in the second position P2 and viewed from the side, the second region B2 of the seat belt B is substantially linear between the shoulder of the occupant C and the first guide portion 31. It is preferable to set the position of the first guide portion 31 so as to extend in the direction of

The second guide portion 32 extends in the vehicle height direction X as its longitudinal direction. The second guide portion 32 is fixed to a portion of the vehicle body frame 2 a of the side wall portion 2 between the C-pillar 3 and the D-pillar 4 . The second guide portion 32 is provided with an insertion hole 35 as an insertion opening through which the second region B2 of the seat belt B is inserted. The insertion hole 35 is provided at a position aligned with the first guide portion 31 in the vehicle length direction Y. As shown in FIG. The second region B2 of the seat belt B is slidable in the vehicle length direction Y while being inserted through the insertion hole 35 along the vehicle length direction Y with the belt width direction as the vehicle height direction X.

The opening width d2 of the insertion hole 35 in the vehicle height direction X is greater than the belt width d1 of the seat belt B, and the seat belt B is moved along the width of the seat belt B by following the tilting movement of the seat back 21 from the first position P1 to the second position P2. It is sized to allow sliding in the high direction X. Typically, it is preferable that the dimension d2 of the insertion hole 35 is set to be at least twice the belt width d1 of the seat belt B. As shown in FIG. As a result, the second region B2 of the seat belt B can slide between the upper end and the lower end of the insertion hole 35 in the vehicle height direction X. As shown in FIG.

According to this second guide portion 32, even when the seat back 21 tilts from the first position P1 to the second position P2, the second region B2 of the seat belt B slides in the insertion hole 35 in the vehicle height direction X. , the seat belt B is restrained from being separated from the chest of the occupant C. Therefore, the second guide portion 32 having the insertion hole 35 has a function essentially different from that of the first guide portion 31 having the insertion hole 31a for restricting the sliding of the seat belt B in the belt width direction. Such a second guide portion 32 is also called a "fitting guide" that maintains contact with the occupant C. As shown in FIG.

The seat back 21 has a shoulder guide 14 on the upper portion near the side wall portion 2 . The shoulder guide 14 is composed of a circular belt through which the seat belt B can be inserted. The shoulder guide 14 is configured to prevent the passage of the tongue 11 while allowing the seat belt B to slide in the belt length direction. According to the shoulder guide 14, the seat belt B itself can be prevented from moving rearward when the seat belt B is released. Therefore, the occupant C can easily grip the tongue 11 when wearing the seat belt B next time, and the operability when wearing the seat belt B is improved.

As shown in FIG. 2, when the interior of the vehicle is viewed from above, the insertion hole 35 of the second guide portion 32 is provided at a detour position D closer to the side wall portion 2 than the virtual seat belt path R. As shown in FIG. The virtual seat belt route R is a route extending along a virtual line that linearly connects the first guide portion 31 and the outer wall portion 21 a of the seat back 21 . That is, when the second guide portion 32 is omitted, the second region B2 of the seat belt B extends along the virtual seat belt route R between the first guide portion 31 and the outer wall portion 21a of the seat back 21. Arranged in a straight line.

Therefore, by inserting the seat belt B through the insertion hole 35 of the second guide portion 32 , the seat belt path S can be arranged in the seat belt path S that detours from the virtual seat belt path R toward the side wall portion 2 . The seat belt path S is an effective path for guiding from the first guide portion 31 to the occupant C in a state in which the seat belt B is less likely to interfere with the seat back 21 than in the virtual seat belt path R.

As shown in FIG. 3, the second guide portion 32 includes a belt holding portion 34 forming an insertion hole 35, a support plate member 33 as a first member integrated with the belt holding portion 34, and a support plate member. and a support plate member 36 as a second member that is separate from 33 .

The seat belt B is held by the belt holding portion 34 in the second region B<b>2 , which is the portion inserted through the insertion hole 35 . Although the material of the belt holding portion 34 is not particularly limited, it is preferable to adopt a material that is effective in suppressing the sliding resistance between the seat belt B and the belt holding portion 34 . As a result, the durability of the seat belt B can be improved, and the pull-out and winding properties of the seat belt B can be improved.

Both of the two support plate members 33 and 36 extend in the vehicle height direction X with the vehicle width direction Z as the plate thickness direction. The support plate member 33 is fixed to the support plate member 36 by fixing members 37 at upper end portions 33 a and lower end portions 33 b in the vehicle height direction X, respectively. The support plate member 36 is fixed to the vehicle body frame 2a of the side wall portion 2 by fixing members 38 at upper end portions 36a and lower end portions 36b in the vehicle height direction X as portions to be fixed. At least one of the two support plate members 33 and 36 can be composed of a plurality of members as required.

The two fixed portions (the upper end portion 36a and the lower end portion 36b) are provided on both sides in the vehicle height direction X with the belt holding portion 34 interposed therebetween. Thereby, the second guide portion 32 is fixed to the vehicle body frame 2a of the side wall portion 2 at each of the upper end portion 36a and the lower end portion 36b of the support plate member 36 across the opening 5 .

The fixing members 37, 38 are typically preferably constructed by means of bolt members, nut members, rivets, or the like.

The lower end portion 36b of the support plate member 36 is a low-rigidity portion having relatively low rigidity among the belt holding portion 34 and the two fixed portions (the upper end portion 36a and the lower end portion 36b) of the second guide portion 32. As a result, when the belt holding portion 34 receives a load from the seat belt B, the second guide portion 32 is preferentially flexurally deformed at the lower end portion 36b, which is a low-rigidity portion.

The support plate member 33 is detachably connected to the support plate member 36 by a fixing member 37 in a state in which the upper end portion 33a and the lower end portion 33b of the support plate member 33 are overlapped in the vehicle width direction Z. As shown in FIG.

As a result, as shown in FIG. 4, in an example of assembly work for assembling the second guide portion 32 to the side wall portion 2 of the vehicle 1, the support plate member 36 is attached to the vehicle body frame 2a of the side wall portion 2 by the fixing member 38 in advance. fixed. After that, the support plate member 33 integrated with the belt holding portion 34 is fixed to the support plate member 36 by the fixing member 37 . In another example of assembly work, the support plate member 33 integrated with the belt holding portion 34 is previously fixed to the support plate member 36 by the fixing member 37 . After that, the support plate member 36 integrated with the support plate member 33 is fixed to the vehicle body frame 2 a of the side wall portion 2 by the fixing member 38 .

As shown in FIG. 1, when the occupant C assumes the standard posture, the seat back 21 of the seat 20 is set to the first position P1. At this time, as shown in FIG. 3, since the second guide portion 32 is provided with the insertion hole 35, the second region B2 of the seat belt B is arranged in the insertion hole 35 at the upper first position Q1. be. As a result, the first area B1 of the seat belt B is stretched over the chest and shoulders of the occupant C, and when the second area B2 of the seat belt B is viewed from the side, the second area B2 is the first guide portion 31. to the shoulder of the occupant C.

Next, with reference to FIGS. 5 and 6, the case where the occupant C changes his or her posture from the standard posture to the comfortable posture will be described.

As shown in FIG. 5, when the occupant C assumes a comfortable posture, the seat back 21 of the seat 20 is tilted rearward from the first position P1 (see FIG. 1) to the second position P2. At this time, the occupant C may tilt the seat back 21 to the second position P2 while wearing the seat belt B, or may tilt the seat back 21 to the second position P2 while seated on the seat 20. The seat belt B may be worn after tilting, or the seat belt B may be worn after the seat back 21 is tilted to the second position P2 and the seat 20 is seated.

When the occupant C takes a comfortable posture according to the tilt angle of the seat back 21, the positions of the shoulders and chest of the occupant C are lowered. receive.

At this time, as shown in FIG. 6, since the second guide portion 32 is provided with the insertion hole 35, the second region B2 of the seat belt B moves upward in the insertion hole 35 according to the downward tensile load. It descends from the first position Q1 to the lower second position Q2. The second region B2 is in a state in which the downward movement within the insertion hole 35 is not restricted, and the movement only in the vehicle width direction Z is restricted. As a result, the first area B1 of the seat belt B is stretched over the chest and shoulders of the occupant C, and when the second area B2 of the seat belt B is viewed from the side, the second area B2 is the first guide portion 31. to the shoulder of the occupant C can be maintained in a straight line.

Below, the effect of the above-mentioned Embodiment 1 is demonstrated.

According to the first embodiment described above, in the seat belt device 10, the seat belt B pulled out from the retractor 30 provided behind the seat 20 passes through the first guide portion 31 and the second guide portion 32 sequentially. Then, it is bridged over the occupant C seated on the seat 20 . In the second guide portion 32 , the seat belt B is inserted through the insertion hole 35 along the vehicle length direction Y with the belt width direction being the vehicle height direction X. At this time, by providing the second guide portion 32 on the side wall portion 2 of the vehicle 1 , the seat belt B can be guided from the first guide portion 31 to the occupant along a path that does not easily interfere with the seat back 21 .

Here, the opening width d2 of the insertion hole 35 in the vehicle height direction X exceeds the belt width d1 of the seat belt B, and follows the movement of the seat back 21 of the seat 20 tilting from the first position P1 to the second position P2. The size is such that the seat belt B can be slid in the vehicle height direction X as a result. Therefore, even when the occupant C takes a comfortable posture, it is possible to prevent the seat belt B from lifting from the occupant.

Therefore, according to the first embodiment described above, it is possible to provide the seatbelt device 10 that can ensure comfort when the occupant C assumes a comfortable posture.

According to the seatbelt device 10 described above, by arranging the insertion hole 35 of the second guide portion 32 at the detour position D, the second region B2 of the seatbelt B interferes with the seatback 21 rather than the virtual seatbelt path R. The occupant C can be guided from the first guide part 31 to the occupant C through a route that is difficult to follow.

According to the seat belt device 10 described above, the second guide portion 32 that guides the second region B2 of the seat belt B is fixed to the side wall portion 2 across the opening 5, so that the second guide portion 32 is fixed to the side wall portion. 2, it can also be used as means for increasing the rigidity around the opening 5 . At this time, the load that the seat belt B receives from the occupant C is distributed from the seat 20 side to the vehicle 1 side through the second guide portion 32, so that the rigidity of the seat 20 itself can be suppressed, thereby reducing the weight of the vehicle 1. can be achieved.

According to the seatbelt device 10 described above, the second guide portion 32 is a low-rigidity portion when the belt holding portion 34 receives a load from the second region B2 of the seatbelt B, and the lower end portion 36b of the support plate member 36 . can preferentially flexurally deform and absorb the load.

According to the seat belt device 10 described above, the support plate member 33 and the support plate member 36 of the second guide portion 32 can be fixed to the side wall portion 2 of the vehicle 1 while being connected in an appropriate order from the state in which they are separated from each other. can. Thereby, the operability when fixing the second guide portion 32 to the side wall portion 2 of the vehicle 1 can be improved.

Next, another embodiment related to the first embodiment will be described with reference to the drawings. In other embodiments, the same reference numerals are assigned to the same elements as those of the first embodiment, and the description of the same elements will be omitted.

(Embodiment 2)
As shown in FIGS. 7 and 8, the seatbelt device 110 of the second embodiment differs from the seatbelt device 10 of the first embodiment in the structure of the second guide portion 132. As shown in FIGS.

As shown in FIG. 8 , the second guide portion 132 has a belt holding portion 34 forming an insertion hole 35 and a support plate member 133 integrated with the belt holding portion 34 . The support plate member 133 is fixed to the vehicle body frame 2a of the side wall portion 2 by fixing members 37 at upper end portions 133a and lower end portions 133b in the vehicle height direction X as fixed portions. This support plate member 133 has substantially the same structure as the two support plate members 33 and 36 of Embodiment 1 are integrated. Thereby, the second guide portion 132 is fixed to the vehicle body frame 2a of the side wall portion 2 at each of the two fixed portions across the opening 5 . In addition, the lower end portion 133b of the support plate member 133 is a low-rigidity portion having relatively low rigidity among the belt holding portion 34 and the two fixed portions (the upper end portion 133a and the lower end portion 133b) of the second guide portion 132. be.

Other configurations are the same as those of the first embodiment.

According to the seatbelt device 110 of the second embodiment, compared to the seatbelt device 10 of the first embodiment, the number of parts of the second guide portion 132 can be reduced and the structure can be simplified.

In addition, the same effects as those of the first embodiment are obtained.

The present invention is not limited to the above-described embodiments, and various applications and modifications are conceivable without departing from the object of the present invention. For example, it is also possible to implement the following forms that apply the above embodiments.

In the above-described embodiment, the second guide portions 32 and 132 are provided with the insertion hole 35 as an insertion opening for the seat belt B. Such an insertion opening can also be adopted.

In the above-described embodiment, the insertion holes 35 of the second guide portions 32 and 132 are provided at the detour position D closer to the side wall portion than the virtual seat belt route R connecting the first guide portion 31 and the outer wall portion 21a of the seat back 21. Although the case has been exemplified, the insertion hole 35 may be provided on the virtual seat belt path R if specific conditions such as the arrangement of the first guide portion 31 are assumed.

In the above-described embodiment, the case where the second guide portions 32 and 132 are fixed to the side wall portion 2 across the opening 5 was exemplified. It may be fixed to the side wall portion 2 at a position.

In the first embodiment described above, the case where the lower end portion 36b of the support plate member 36 of the second guide portion 32 is a low-rigidity portion with respect to the belt holding portion 34 and the upper end portion 36a has been exemplified. The upper end portion 36a of 36 may be a low-rigidity portion relative to the belt holding portion 34 and the lower end portion 36b. In the second embodiment described above, the lower end portion 133b of the support plate member 133 of the second guide portion 132 is a low-rigidity portion relative to the belt holding portion 34 and the upper end portion 133a. The upper end portion 133a of the plate member 133 may be a low-rigidity portion relative to the belt holding portion 34 and the lower end portion 133b.

In the above-described embodiments, the seat belt devices 10 and 110 applied to the seat 20 for the rear seat of the vehicle 1 have been exemplified. can also be applied to sheets of

Reference Signs List 1 vehicle 2 side wall portion 5 opening 10, 110 vehicle seat belt device 20 seat 21 seat back 21a outer wall portion 30 retractor 31 first guide portion 32, 132 second guide portion 33 support plate member (first member)
34 belt holding part 35 insertion hole (insertion opening)
36 support plate member (second member)
36a upper end (fixed portion)
36b Lower end (fixed part, low rigidity part)
133a upper end (fixed portion)
133b Lower end (fixed part, low rigidity part)
B Seatbelt C Occupant D Detour position d1 Belt width d2 Opening width R Seatbelt virtual path P1 First position (standard posture position)
P2 second position (comfortable posture position)
X vehicle height direction Y vehicle length direction

Claims (5)

A vehicle seat belt device provided in a vehicle,
A seat belt that spans the occupant seated on the seat,
a retractor that is provided behind the seat and winds the seat belt so that it can be pulled out;
a first guide portion that guides the seat belt pulled out from the retractor;
a second guide portion provided on a side wall portion of the vehicle in front of the first guide portion and guiding the seat belt between the first guide portion and the occupant;
with
The second guide portion is provided with an insertion opening through which the seat belt is inserted along the vehicle length direction with the belt width direction as the vehicle height direction, and the opening width of the insertion opening in the vehicle height direction is The vehicle has a size that exceeds the belt width of the seat belt and allows the seat belt to slide in the vehicle height direction following the tilting motion of the seat back of the seat from the standard posture position to the comfortable posture position. seat belt device for. 2. The vehicle seat according to claim 1, wherein the second guide portion includes the insertion opening at a detour position closer to the side wall portion than a virtual seat belt path connecting the first guide portion and the outer wall portion of the seatback. belt device. An opening is provided in the side wall portion, and the second guide portion includes a belt holding portion forming the insertion opening and two covers provided on both sides of the belt holding portion in the vehicle height direction. 3. The seatbelt device for a vehicle according to claim 1, further comprising a fixing portion, which is fixed to said side wall portion at each of said two fixed portions across said opening. 4. The vehicle seat belt device according to claim 3, wherein the second guide portion includes a low-rigidity portion having relatively low rigidity in the belt holding portion and the two fixed portions. The second guide portion has a first member integrated with the belt holding portion and a second member including the two fixed portions, and the first member and the second member are separable. 5. The seat belt device for a vehicle according to claim 3 or 4, which is connected to the .

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