JP2019116265A - Occupant restraint device for vehicle - Google Patents

Abstract

To obtain an occupant restraint device for a vehicle capable of transmitting an input load to clavicles of an occupant from a shoulder belt side during a head-on collision.SOLUTION: An occupant restraint device 10 for a vehicle includes: a three-point-type seat belt device 20; a belt guide 40 which is provided on an upper section 16A side on an end side in a seat width direction of a seat back 16, is inserted with a shoulder belt section 22A thereinto, and is arranged along a restraint surface of an occupant P seated on a seat 12; a connecting member 36 which fixes a rear end 40A in a longitudinal direction of the belt guide 40 to a bezel 34 on the one end side in the seat width direction of the upper section 16A of the seat back 16; and a front side section 42 which is provided in the belt guide 40, is arranged in front of the vehicle of clavicles 92 of the occupant P seated on the seat 12 in a normal state, and is configured to hardly bend compared with a rear side section 44 in the longitudinal direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle occupant restraint system.

  In Patent Document 1 below, there is a structure in which a chest belt is provided on the shoulder belt, and a pad material is provided in which the rigidity of the portion corresponding to the occupant's chest of the chest abutment is changed according to the stiffness distribution of the occupant's chest. It is disclosed. In this structure, the pad material substantially uniformly distributes the body deformation to the chest member at the time of chest restraint due to the frontal collision, thereby reducing the burden on the body. In an emergency, the back (air belt) mounted in the shoulder belt is expanded to expand the restraint range of the occupant's chest, and the pressure generated by the occupant is received by the relatively strong shoulder in the skeleton of the human body. Patent Document 2 discloses an air belt device for relieving an impact generated on a passenger. Patent Document 3 discloses a structure in which an air bag is provided on a shoulder belt portion of the occupant's head outside the passenger compartment, the air bag being separately movable relative to the seat belt. There is.

Unexamined-Japanese-Patent No. 2004-075015 JP, 2015-123915, A JP 2000-142303 A

  In the structure described in Patent Document 1, the chestrest member is suspended from the mounting portion of the shoulder anchor by a flexible arm as positioning means of a predetermined length, and the chestrest member is positioned on the chest of the occupant. However, there is a possibility that the chest pad member may move to various positions and the chest pad member may not be set at an appropriate position with respect to the chest of the passenger due to the difference in the physical condition of the occupants and the difference in the sitting posture. In addition, at the time of a frontal collision, the chest pad member can not follow the forward movement of the occupant, remains at the initial position and is separated from the chest of the occupant, and there is a possibility that the chest pad member can not receive a load at an appropriate position.

  SUMMARY OF THE INVENTION In view of the above fact, it is an object of the present invention to provide a vehicle occupant restraint system capable of transmitting an input load from the shoulder belt side to the clavicle of an occupant at the time of a frontal collision.

  The vehicle occupant restraint system according to the invention of claim 1 is a shoulder extending from above one end side of the seat back constituting the vehicle seat on which the occupant sits down toward the buckle at the lower side in the other side of the seat width direction. A three-point seat belt device including a belt, and an upper side of the seat back at one end in the seat width direction, the shoulder belt being inserted, and along a restraint surface of an occupant seated on the vehicle seat A belt guide to be disposed, a fixing portion for fixing the rear end in the longitudinal direction of the belt guide to a shoulder in the upper side of the seat back in the sheet width direction, and a front side in the longitudinal direction of the belt guide The front side portion is disposed forward of the clavicle of the occupant seated on the vehicle seat in the state and is configured to be less likely to bend than the rear side portion in the longitudinal direction.

  According to the first aspect of the present invention, the shoulder belt of the three-point seat belt device extends from above one end side of the seat back in the seat width direction toward the buckle at the lower end in the other side of the seat width direction. A belt guide through which a shoulder belt is inserted is provided on the upper side of the seat back in the sheet width direction one end side, and the longitudinal rear end of the belt guide is fixed by the fixing portion in the sheet width direction of the upper part of the seat back It is fixed by being connected to the shoulder at one end. As a result, when the occupant seated on the vehicle seat wears the seat belt of the three-point seat belt device, the shoulder belt relatively moves along the belt guide according to the detachment operation of the seat belt and the posture change of the occupant. The belt guide is configured such that the front side in the longitudinal direction is less likely to bend than the rear side, and the front of the belt is in front of the clavicle of the occupant seated on the vehicle seat in the normal state (state at the time of non frontal collision). Is located in Thus, the bendable rear side of the belt guide is disposed at a position facing the clavicle of the occupant in a normal state.

  When the occupant moves forward with respect to the seat back during a frontal collision, the belt guide shifts upward and backward with respect to the occupant. At that time, the front side in the longitudinal direction of the belt guide is more difficult to bend than the rear side, so that the hard front side can not follow the shoulder belt any more (that is, the curved portion of the occupant's shoulder) Can not pass through), stay in front of the shoulders of the occupant. Therefore, the belt guide can be self-fitted to an appropriate position of the occupant regardless of the occupant's physical size and sitting posture, and the clavicle of the occupant can be pushed by the front side portion of the belt guide. Therefore, the load from the shoulder belt to the occupant can be transmitted to the more durable clavicle.

  According to a second aspect of the present invention, in the vehicle occupant restraint system according to the first aspect, the fixing portion fixes the longitudinal rear end portion of the belt guide and the shoulder when tension above a predetermined value acts. Or is extended according to the distance between the rear end in the longitudinal direction of the belt guide and the shoulder when a tension equal to or greater than a predetermined value is applied.

  According to the second aspect of the present invention, when a tension equal to or greater than a predetermined value acts on the fixing portion due to a frontal collision, the fixing between the rear end in the longitudinal direction of the belt guide and the shoulder by the fixing portion is released. Alternatively, the fixing portion extends in accordance with the distance between the longitudinal rear end of the belt guide and the shoulder opening. Thus, the belt guide can be moved to the front side of the vehicle with respect to the shoulder of the seat back, and the belt guide can be disposed at an appropriate position of the occupant even in the second half of the collision.

  The invention of claim 3 is the vehicle occupant restraint apparatus according to claim 1 or 2, wherein the belt guide is a belt insertion portion through which the shoulder belt is inserted, and the vehicle relative to the belt insertion portion. And a pad disposed on the side of the occupant seated on the seat.

  According to the third aspect of the present invention, in the belt guide, the pad is disposed on the side of the occupant seated on the vehicle seat with respect to the belt insertion portion through which the shoulder belt is inserted. As a result, by interposing the pad between the belt insertion portion and the occupant, the comfort of the occupant when wearing the seat belt is improved.

  The invention according to claim 4 is the vehicle occupant restraint system according to claim 3, wherein the pad is provided with a plurality of slits formed on the side of the occupant seated on the vehicle seat in the thickness direction of the pad. Alternatively, the ease of bending is set to be different depending on the size of the slit.

  According to the fourth aspect of the present invention, the pad is set so that the ease of bending differs depending on the presence or absence of the plurality of slits formed on the side of the occupant seated on the vehicle seat or the size of the slits. With a simple construction, it is possible to adjust the ease of bending of the front and rear sides of the belt guide.

  According to a fifth aspect of the present invention, in the vehicle occupant restraint system according to the third aspect, the pad is formed of a material having the front side portion harder than the rear side portion, or the front side portion is formed of the rear side portion It is also thickly formed.

  According to the invention of claim 5, the pad is formed of a material whose front side is harder than the rear side, or the front side is formed thicker than the rear side and has a simple configuration. It is possible to adjust the ease of bending of the front and rear sides of the belt guide.

  According to a sixth aspect of the present invention, in the vehicle occupant restraint system according to the third aspect, the pad is easily bent depending on the presence or absence of a plurality of holes formed in the thickness direction of the pad or the size of the holes. Are set to be different.

  According to the invention of claim 6, the pad is set so that the ease of bending is different depending on the presence or absence of the plurality of holes formed in the thickness direction or the size of the holes, and the structure is simple. Thus, it is possible to adjust the ease of bending of the front and rear portions of the belt guide.

  According to the invention of claim 7, in the vehicle occupant restraint system according to any one of claims 3 to 6, the skin covering the belt insertion portion and the pad is an occupant seated on the vehicle seat. The lower surface skin on the side of the fabric is constituted by a double cloth, and the fabric on the side of the double cloth contacting the occupant has a smaller coefficient of friction than the friction coefficient of the general portion constituting the other portion of the skin. Or, it is formed of a cloth that is easier to stretch than the general part that constitutes the other part of the skin.

  For example, when the occupant wears clothes of a material having a large coefficient of friction, the clothes and the belt guide do not slip, the belt guide stays at the chest of the seated occupant, and the occupant moves forward during a frontal collision. The belt guide may push the occupant's chest. On the other hand, in the present invention according to claim 7, the lower surface skin on the side of the occupant seated in the vehicle seat is made of a double cloth, and the lower surface skin on the side contacting the occupant of the double cloth is the outer skin Since it is formed of a cloth having a lower coefficient of friction than that of the general part, the belt guide moves to a position facing the clavicle of the occupant without staying at the initial position where the belt guide contacts the occupant when the occupant falls forward in a frontal collision. Alternatively, in the present invention according to claim 7, since the lower surface skin on the side in contact with the occupant of the double cloth is formed of a cloth that is easier to stretch than the general portion of the skin, the lower surface skin in contact with the occupant extends and the belt The guide moves toward the clavicle of the occupant. For this reason, compression of the chest of the occupant by the belt guide can be reduced.

  According to the vehicle occupant restraint system of the present invention, the input load can be transmitted from the shoulder belt side to the clavicle of the occupant at the time of a frontal collision.

1 is a schematic perspective view showing a vehicle seat provided with a vehicle occupant restraint system according to a first embodiment of the present invention. FIG. 1 is a side view showing a state in which an occupant seated on a vehicle seat is restrained by a vehicle occupant restraint system according to a first embodiment of the present invention. FIG. 1 is an enlarged cross-sectional view along a longitudinal direction of a belt guide showing a belt guide used in a vehicle occupant restraint system according to a first embodiment of the present invention in a straight state. 4A is a cross-sectional view of the belt guide taken along line 4A-4A in FIG. 3, and FIG. 4B is a cross-sectional view of the belt guide taken along line 4B-4B in FIG. is there. FIG. 7 is a side view corresponding to FIG. 2 showing a state in which the relative position between the occupant and the belt guide is shifted at the initial stage of a frontal collision in the vehicle occupant restraint system according to the first embodiment of the present invention. FIG. 7 is a side view corresponding to FIG. 2 showing a state of a belt guide whose fixing portion has been cut in the second half of a frontal collision in the vehicle occupant restraint system according to the first embodiment of the present invention. FIG. 9 is a side view corresponding to FIG. 2, showing a state of a belt guide in which a fixing portion is extended in the second half of a frontal collision in the vehicle occupant restraint system according to the second embodiment of the present invention. It is an expanded sectional view along the longitudinal direction of a belt guide showing a belt guide used for a vehicle occupant restraint system concerning a 3rd embodiment of the present invention in a straight state. It is an expanded sectional view along a longitudinal direction of a belt guide showing a belt guide used for a vehicle occupant restraint system concerning a 4th embodiment of the present invention in a straight state. It is an enlarged front view showing a single pad of a belt guide used for a vehicle occupant restraint system concerning a 4th embodiment of the present invention. FIG. 8 is a schematic front view showing a state in which a plurality of occupants of different physical sizes who are seated on a vehicle seat are restrained by the vehicle occupant restraint system of the comparative example. FIG. 13 is a side view showing a state in which the belt guide is shifted rearward of the shoulder of the occupant at the time of a frontal collision in the vehicle occupant restraint device of the comparative example. It is a sectional view corresponding to Drawing 4 (A) which shows a belt guide used for a crew member restraint device for vehicles concerning a 5th embodiment of the present invention. In a vehicle occupant restraint system according to a fifth embodiment of the present invention, a side view showing a state of a belt guide in the second half of a frontal collision. (A) is a side view showing a state in which an occupant seated on a vehicle seat is restrained by a vehicle occupant restraint system according to a sixth embodiment of the present invention, and (B) is a sixth embodiment of the present invention. It is an expanded sectional view along the longitudinal direction of a belt guide showing a belt guide used for a crew member restraint device for vehicles concerning an embodiment in a straight state. (A) is a side view showing a state in which the relative position between an occupant and a belt guide is shifted at the initial stage of a frontal collision in the vehicle occupant restraint system according to the sixth embodiment of the present invention; It is an expanded sectional view along the longitudinal direction of a belt guide showing a belt guide of a front collision initial stage used in a vehicle occupant restraint system concerning a 6th embodiment of the invention in a straight state. In a vehicle occupant restraint system according to a sixth embodiment of the present invention, it is a side view showing a state of a belt guide in the second half of a frontal collision. FIG. 14 is a side view showing a state in which the belt guide remains at the chest of the occupant at the time of a frontal collision in the vehicle occupant restraint system of another comparative example.

  Embodiments of the present invention will be described in detail based on the drawings. In these drawings, an arrow FR appropriately shown indicates the front side of the vehicle, an arrow UP indicates the upper side of the vehicle, and an arrow OUT indicates the outer side in the vehicle width direction. Moreover, the arrow L suitably shown in the drawing which shows a belt guide has shown the longitudinal direction of the belt guide. In the embodiment of the present invention, the seat front, the seat belt width direction, and the seat upper direction substantially coincide with the vehicle front, the vehicle width direction, and the vehicle upper side, respectively. Unify and describe.

First Embodiment
A vehicle occupant restraint system according to a first embodiment of the present invention will be described with reference to FIGS. Moreover, each figure is schematic and the illustration having a low relevance to the present invention is omitted. Furthermore, in FIG. 1, illustration of the occupant P described later is omitted.

(Configuration of a vehicle occupant restraint system)
As shown in FIG. 1, the vehicle occupant restraint system 10 according to the present embodiment is provided on a vehicle seat (hereinafter simply referred to as a “seat”) 12 on the driver's seat side on the right side of the vehicle front seat in the cabin. It is.

  The seat 12 is disposed on the seat cushion 14 on which the occupant sits, the seat back 16 supporting the back of the seated occupant at the rear end of the seat cushion 14, and the upper end of the seat back 16 to support the head of the seated occupant And a headrest 18 for On the outer side in the vehicle width direction of the upper portion 16A of the seat back 16, a bezel 34 is provided as a shoulder opening through which a seat belt (webbing) 22 described later is inserted and guided.

  The seat belt device 20 provided for the seat 12 is a so-called three-point seat belt device, and includes a seat belt 22 and an anchor plate 24 with which one end of the seat belt 22 is engaged. In the seat belt device 20, the other end of the seat belt 22 is locked and a predetermined tension is applied to the seat belt 22. A retractor 26 with a pretensioner function, and an outer upper portion (pillar) of the seat 12 in the vehicle width direction And a shoulder anchor 28 that folds the seat belt 22 back to the retractor 26 side. The seat belt device 20 further includes a buckle 32 fixed by fitting the tongue plate 30 inserted into the seat belt 22.

  Of the seat belt 22, a portion from the shoulder anchor 28 to the buckle 32 is referred to as a shoulder belt portion (shoulder belt) 22A, and a portion from the buckle 32 to the anchor plate 24 is referred to as a lap belt portion 22B.

  The shoulder belt portion 22A restrains the occupant P from the front obliquely from the shoulder S at the upper portion in the vehicle width direction outside of the occupant P (see FIG. 2) seated on the seat 12 to the waist L at the lower portion in the vehicle width direction. is there. Here, the vehicle width direction outer side of the seat 12 is an example of the seat width direction one end side. The vehicle width direction inner side of the seat 12 is an example of the seat width direction other end side.

  Further, as shown in FIGS. 1 and 2, in the vehicle occupant restraint system 10, a belt guide 40 is provided on the upper side of the seat back 16 in the vehicle width direction outside. The belt guide 40 is disposed along the restraint surface of the occupant P seated on the seat 12 while the shoulder belt portion 22A is inserted (see FIG. 2). That is, the belt guide 40 extends diagonally downward from the upper side of the seatback 16 on the outer side in the vehicle width direction toward the inner side in the vehicle width direction of the seatback 16. In addition, the vehicle occupant restraint device 10 has a rear end portion 40A in the longitudinal direction of the belt guide 40 (that is, an upper end portion on the outer side in the vehicle width direction of the belt guide 40) A connecting member 36 is provided as a fixing portion for connecting and fixing to 34.

  The bezel 34 includes an insertion hole 34A through which the shoulder belt portion 22A is inserted (see FIG. 1). One longitudinal end 36 A of the connecting member 36 is fixed to the wall (upper wall) of the insertion hole 34 A of the bezel 34. Further, the other end 36B in the longitudinal direction of the connecting member 36 is fixed to the rear end 40A in the longitudinal direction of the belt guide 40 (see FIG. 3). At the time of a frontal collision of the vehicle, the occupant P seated on the seat 12 moves toward the front of the vehicle with respect to the seat back 16 (see FIG. 5). Thus, when tension above the predetermined value acts on the connecting member 36, the fixing between the rear end 40A of the belt guide 40 in the longitudinal direction and the bezel 34 by the connecting member 36 is released. In the present embodiment, the connecting member 36 is in the shape of a band, and the connecting portion of the connecting member 36 with the bezel 34 is cut, whereby the rear end portion 40A of the belt guide 40 in the longitudinal direction by the connecting member 36 and the bezel 34 It is designed to release the fixation with (see Figure 6).

  Further, as shown in FIG. 2, the front end 40 B in the longitudinal direction of the belt guide 40 (that is, the lower end in the vehicle width direction) is forward of the clavicle 92 of the occupant P seated on the seat 12 (that is, the vehicle It is located on the lower side in the vertical direction). The belt guide 40 includes a front side portion 42 forming a front side portion in the longitudinal direction, and a rear side portion 44 disposed on the rear side of the front side portion 42 and forming a rear side portion in the longitudinal direction. The front side portion 42 is disposed forward of the clavicle 92 of the occupant P seated on the seat 12 in a normal state, and is configured to be less likely to bend than the rear side portion 44. In other words, the rear side portion 44 is configured to be more easily bent than the front side portion 42, and is disposed in a region facing the clavicle 92 of the occupant P seated on the seat 12 in a normal state (that is, a non frontal collision state). ing.

  In order to make the configuration of the belt guide 40 easy to understand, FIG. 3 shows the belt guide 40 in a straight state. As shown in FIGS. 3 and 4A and 4B, the belt guide 40 has a tubular portion 46 as a belt insertion portion through which the shoulder belt portion 22A is inserted and a seat 12 seated on the inside of the belt guide 40. A pad 48 is provided between the occupant P (see FIG. 2) and the shoulder belt portion 22A (i.e., the cylindrical portion 46). On the surface of the belt guide 40, a bag-like outer skin 50 covering the cylindrical portion 46 and the pad 48 is provided.

  As shown in FIG. 3, the tubular portion 46 is disposed along the longitudinal direction of the belt guide 40 (the direction of the arrow L shown in FIG. 3). The cylindrical portion 46 is formed in a substantially rectangular cylindrical shape in a cross-sectional view in a direction orthogonal to the longitudinal direction of the shoulder belt portion 22A (see FIGS. 4A and 4B). An insertion hole 47 penetrating in the longitudinal direction of the belt guide 40 is formed in the cylindrical portion 46, and the shoulder belt portion 22A is inserted through the insertion hole 47. That is, the cylindrical portion 46 is disposed so as to surround the shoulder belt portion 22A, and the shoulder belt portion 22A slides along the longitudinal direction of the cylindrical portion 46. The cylindrical portion 46 is formed of, for example, a low friction resin, and the sliding resistance of the cylindrical portion 46 is lowered to smoothly pull out or wind the shoulder belt portion 22A. The cylindrical portion 46 can be bent and deformed in a direction intersecting the longitudinal direction (that is, in the thickness direction of the cylindrical portion 46).

  The pad 48 extends along the tubular portion 46 of the belt guide 40. The pad 48 includes a front side 48 B corresponding to the front side 42 of the belt guide 40 and a rear side 48 A corresponding to the rear side 44 of the belt guide 40. The pad 48 has a thickness (thickness corresponding to the thickness direction of the shoulder belt portion 22A) on the side of the rear side 48A in the front side 48B larger than that on the side of the front side 48B in the rear side 48A. In other words, the pad 48 is configured such that the average of the thickness of the front side portion 48B is larger than the average of the thickness of the rear side portion 48A. The thickness of the front side portion 48B of the pad 48 is formed to be gradually thinner from the middle portion in the longitudinal direction to the front side. The thickness of the rear side 48A of the pad 48 is formed to be gradually thinner toward the rear in the longitudinal direction. The pad 48 is formed of, for example, a flexible resin such as a foamed resin. The pad 48 may be joined, for example, by adhesion or the like to the cylindrical portion 46 so that the position does not shift inside the belt guide 40.

  In the rear side portion 48A of the pad 48, a plurality of slits 54 are formed in the longitudinal direction of the pad 48 on the side of the occupant P (see FIG. 2) seated on the seat 12, that is, the side facing the skin 50. In other words, the plurality of slits 54 are formed on the back side 48 </ b> A of the pad 48 opposite to the cylindrical portion 46. The slit 54 has, for example, an inverted V shape so that the width on the side facing the skin 50 (the width along the longitudinal direction of the shoulder belt portion 22A) gradually becomes larger than the width on the cylindrical portion 46 side. It is formed. The depth of the plurality of slits 54 is, for example, in the range of about 1/2 to 1/3 of the thickness of the back side 48A of the pad 48. The front side portion 48B of the pad 48 is not formed with a plurality of slits.

  By providing the plurality of slits 54, the rear side portion 48A of the pad 48 is easily bent to the side of the skin 50 in the direction in which the distance between the slits 54 becomes narrow, that is, the side opposite to the cylindrical portion 46. Therefore, the rear side portion 48A of the pad 48 is more likely to be bent to the opposite side of the cylindrical portion 46 than the front side portion 48B of the pad 48. Thereby, the rear side portion 44 of the belt guide 40 corresponding to the rear side portion 48A of the pad 48 is easily bent along the restraint surface of the occupant P (see FIG. 2) seated on the seat 12. For example, even when the rear side 44 of the belt guide 40 moves to a position facing the curved portion of the shoulder S of the occupant P (see FIG. 2) seated on the seat 12, the rear side 44 of the belt guide 40 (Ie, the rear side 48A of the pad 48) is adapted to be bent along the shoulder S of the occupant P (see FIG. 2) seated on the seat 12 (see FIG. 6).

  The front side portion 48B of the pad 48 is less likely to be bent to the side of the skin 50, that is, the side opposite to the cylindrical portion 46, as compared with the rear side portion 48A of the pad 48, by not providing a plurality of slits. For example, the front side portion 48B of the pad 48 is difficult to bend along the curved portion of the shoulder S of the occupant P (see FIG. 2) seated on the seat 12, and the front side portion of the belt guide 40 corresponding to the front side portion 48B of the pad 48 42 is configured to be difficult to move toward the shoulder S of the occupant P (see FIG. 2).

  The skin 50 is provided with an opening 56 through which the shoulder belt 22A is inserted on the side of the rear end 40A and the side of the front end 40B of the belt guide 40 (see FIG. 3). The skin 50 is made of, for example, a cloth or soft resin in which fibers are woven, and is configured to prevent or suppress the rubbing with the occupant P (see FIG. 2).

  The other end 36B of the connecting member 36 is fixed to the rear end 40A of the belt guide 40 (see FIG. 3). In the present embodiment, the other end 36 B of the connecting member 36 is attached to the skin 50 of the rear end 40 A of the belt guide 40, but may be attached to the cylindrical portion 46 of the belt guide 40.

(Action and effect)
Next, the operation and effects of the vehicle occupant restraint system 10 of the first embodiment will be described.

  In the vehicle occupant restraint system 10, the rear end portion 40A in the longitudinal direction of the belt guide 40 is fixed to the bezel 34 outside the seat width direction of the upper portion 16A of the seat back 16 by the joining member 36. When the occupant P seated on the seat 12 wears the seat belt 22 of the seat belt device 20, the shoulder belt portion 22A relatively moves along the belt guide 40 according to the detachment operation of the seat belt 22 and the posture change of the occupant P. The longitudinal front side portion 42 of the belt guide 40 is configured to be less likely to bend than the longitudinal rear side portion 44 of the belt guide 40, and as shown in FIG. The front side portion 42 is disposed forward of the clavicle 92 of the occupant P seated on the seat 12). Thus, the rear side portion 44 which is more easily bent than the front side portion 42 of the belt guide 40 is disposed at a position facing the clavicle 92 of the occupant P.

  As shown in FIG. 5, when the occupant P seated on the seat 12 moves toward the front of the vehicle with respect to the seat back 16 at the time of a frontal collision, the belt guide 40 is displaced upward and rearward of the vehicle with respect to the occupant P. . That is, since the belt guide 40 is fixed to the bezel 34 of the upper portion 16A of the seat back 16 by the connecting member 36, the belt guide 40 moves upward of the vehicle P with respect to the occupant P by the forward movement of the occupant P. Shift to the rear of the vehicle. At that time, the rear side portion 44 of the belt guide 40 bends more easily than the front side portion 42, and the rear side portion 44 of the belt guide 40 bends along the curved portion of the shoulder S of the occupant P. On the other hand, since the front side portion 42 of the belt guide 40 is more difficult to bend than the rear side portion 44, the front side portion 42 hardly passes through the curved portion of the shoulder portion S of the occupant P.

  As shown in FIG. 6, when the occupant P moves further forward with respect to the seat back 16 in the second half of the frontal collision and a tension equal to or greater than a predetermined value acts on the joining member 36, one end of the joining member 36 36A is cut, and the fixation between the rear end 40A of the belt guide 40 and the bezel 34 is released. At that time, the front side portion 42 of the belt guide 40 hardly passes through the curved portion of the shoulder S of the occupant P, and can not move along the shoulder belt portion 22A any more. Stay in Therefore, the belt guide 40 is self-fitted to an appropriate position of the occupant P regardless of the physical constitution and the sitting posture of the occupant P, and the front side portion 42 of the belt guide 40 is disposed in a region facing the clavicle 92 of the occupant P. Thus, the clavicle 92 of the occupant P can be pushed by the front side portion 42 of the belt guide 40. Therefore, the input load from the shoulder belt portion 22A to the occupant P can be transmitted to the clavicle 92 which is more resistant than the rib 94 at the time of a frontal collision.

  Further, in the vehicle occupant restraint system 10, the front side portion 42 of the belt guide 40 is disposed in a region facing the clavicle 92 of the occupant P, so that a load on the rib 94 relatively less resistant than the clavicle 92 can be obtained. It can be reduced. For this reason, generation | occurrence | production of the chest bending (namely, rib bending) by which rib part 94 vicinity of the passenger | crew P deform | transforms is suppressed or prevented.

  Further, in the vehicle occupant restraint system 10, when the tension above the predetermined value acts on the connecting member 36, the fixing of the rear end 40A of the belt guide 40 in the longitudinal direction by the connecting member 36 and the bezel 34 is released. . In this embodiment, the connection between the one end 36A of the connecting member 36 and the bezel 34 is cut, whereby the fixing of the rear end 40A of the belt guide 40 in the longitudinal direction by the connecting member 36 and the bezel 34 is released. Ru. Thereby, the belt guide 40 can be moved to the vehicle front side with respect to the bezel 34 of the upper portion 16A of the seat back 16. Therefore, also in the second half of the collision, the belt guide 40 can be disposed at an appropriate position of the occupant P, that is, the front side portion 42 of the belt guide 40 in the area facing the clavicle 92 of the occupant P.

  Further, in the vehicle occupant restraint device 10, the pad 48 is disposed on the belt guide 40 on the side of the occupant P seated on the seat 12 with respect to the cylindrical portion 46 through which the shoulder belt portion 22A is inserted. As a result, by interposing the pad 48 between the cylindrical portion 46 and the occupant P, the comfort when the occupant P wears the seat belt 22 is improved.

  Further, in the vehicle occupant restraint system 10, the ease of bending of the rear side portion 48A and the front side portion 48B differs depending on the presence or absence of the plurality of slits 54 formed on the side of the occupant P seated on the seat 12 in the pad 48. Is set as. In the present embodiment, by providing the plurality of slits 54 in the rear side portion 48A of the pad 48 and not providing the slits in the front side portion 48B, the front side portion 48B of the pad 48 is configured to be more difficult to bend than the rear side portion 48A. . Further, by making the average of the thickness of the front side portion 48B of the pad 48 thicker than the average of the thickness of the rear side portion 48A of the pad 48, the front side portion 48B of the pad 48 is more difficult to bend than the rear side portion 48A. ing. Therefore, it is possible to adjust the ease of bending of the front side portion 42 and the rear side portion 44 of the belt guide 40 with a simple configuration.

  11 and 12 show a vehicle occupant restraining device 200 of the comparative example in a schematic configuration view. As shown in FIGS. 11 and 12, the vehicle occupant restraint system 200 is provided with a belt guide 202 through which the shoulder belt portion 22A is inserted on the upper side in the vertical direction of the shoulder belt portion 22A. Although not shown, a pad having a uniform configuration is provided in the inside of the belt guide 202 along the longitudinal direction. The vehicle occupant restraint system 200 further includes a belt-like fixing member 204 for fixing the rear end 202A in the longitudinal direction of the belt guide 202 to the bezel 34 in the upper portion of the seatback 16. The fixing member 204 is configured not to be cut even when a tension equal to or greater than a predetermined value acts. For this reason, the fixation between the rear end 202A of the belt guide 202 in the longitudinal direction and the bezel 34 by the fixing member 204 at the time of a frontal collision is not released.

  As shown in FIG. 11, when occupants P1, P2 and P3 of different physical sizes are seated on the seat back 16 of the vehicle seat, the position of the belt guide 202 is different with respect to the occupants P1, P2 and P3 of different physical sizes. change. For example, the occupant P1 is an AM 95 dummy modeled on a large sized male occupant, the occupant P2 is an AM 50 dummy modeled on a standard sized male occupant, and the occupant P3 is a small sized female It is an AF05 dummy that models an occupant. In the vehicle occupant restraint system 200, the rear end portion 202 </ b> A of the belt guide 202 is fixed to the bezel 34 at the top of the seat back 16 by a fixing member 204. For this reason, the belt guides 202 move to various positions with respect to the occupants P1, P2, P3 due to the physical difference of the occupants P1, P2, P3 and the difference in the sitting posture, and the belt guides 202 are suitable for everyone. Can not be worn.

  As shown in FIG. 12, when the occupant P2 moves forward with respect to the seat back 16 at the time of a frontal collision of the vehicle, the belt guide 202 can not follow the movement of the occupant P2, and the belt guide 202 It is disposed behind the shoulder S of the occupant P. Therefore, the belt guide 202 is out of the area facing the clavicle 92 of the occupant P, and the belt guide 202 can not push the clavicle 92 of the occupant P. Therefore, in the vehicle occupant restraint device 200 of the comparative example, it is difficult to stably transmit the load to the clavicle 92 of the occupant P by the belt guide 202. Note that, in FIG. 12, only the occupant P2 is illustrated in order to make the configuration of the vehicle occupant restraint device 200 easy to understand.

  On the other hand, in the vehicle occupant restraint system 10 of the first embodiment, the front side portion 42 of the belt guide 40 is more difficult to bend than the rear side portion 44, so the front side portion 42 is the shoulder S of the occupant P. It is difficult to pass through the curved portion of the vehicle, can not move along the shoulder belt portion 22A, and the front side portion 42 stays on the front side of the shoulder S of the occupant P. Therefore, the belt guide 40 self-fits to an appropriate position of the occupant P regardless of the physical constitution and sitting posture of the occupant P, and the load is stably transmitted to the clavicle 92 of the occupant P at the front side portion 42 of the belt guide 40 be able to.

Second Embodiment
Next, a vehicle occupant restraint system 70 according to a second embodiment will be described with reference to FIG. The same components as those in the first embodiment described above are denoted by the same reference numerals and the description thereof will be omitted.

  FIG. 7 shows the second half of the frontal collision of the vehicle occupant restraint system 70 according to the second embodiment. As shown in FIG. 7, the vehicle occupant restraint device 70 is fixed as connecting the rear end 40 </ b> A in the longitudinal direction of the belt guide 40 to the bezel 34 outside the seat width direction of the upper portion 16 </ b> A of the seat back 16. And the extensible member 72 of FIG. One longitudinal end 72A of the extensible member 72 is attached to the bezel 34, and the other longitudinal end 72B of the extensible member 72 is attached to the longitudinal rear end 40A of the belt guide 40. There is. The stretchable member 72 is formed of a cloth that is easier to stretch than the shoulder belt portion 22A, and when a tension equal to or greater than a predetermined value is applied, the stretchable member 72 is between the rear end 40A in the longitudinal direction of the belt guide 40 and the bezel 34. It is configured to extend according to the distance.

  As shown in FIG. 7, in the vehicle occupant restraint system 70, the rear end 40A of the belt guide 40 in the longitudinal direction and the bezel when a tension equal to or greater than a predetermined value acts on the extensible member 72 in the second half of the frontal collision. Depending on the distance from 34, the extensible member 72 extends. The front side portion 42 of the belt guide 40 does not easily pass through the curved portion of the shoulder S of the occupant P, and can not move along the shoulder belt portion 22A any more, and stays on the front side of the shoulder S of the occupant P. Therefore, the belt guide 40 is self-fitted to an appropriate position of the occupant P regardless of the physical constitution and the sitting posture of the occupant P, and the front side portion 42 of the belt guide 40 is disposed in a region facing the clavicle 92 of the occupant P. . Therefore, the input load from the shoulder belt portion 22A to the occupant P can be transmitted to the clavicle 92 which is more resistant than the rib 94 at the time of a frontal collision.

Third Embodiment
Next, a vehicle occupant restraint system 100 according to a third embodiment will be described with reference to FIG. The same components as those in the first and second embodiments described above are denoted by the same reference numerals, and the description thereof will be omitted.

  As shown in FIG. 8, the vehicle occupant restraint system 100 is provided with a belt guide 102. A pad 104 is provided inside the belt guide 102 along the cylindrical portion 46 through which the shoulder belt portion 22A is inserted. Although not shown, the pad 104 is disposed on the side of the occupant seated in the seat. The pad 104 is disposed at a position corresponding to the front side portion 42 of the belt guide 102 and a soft pad 108 disposed at a position corresponding to the back side 44 of the belt guide 40 and softer than the hard pad 106. Is equipped. In other words, the hard pad 106 on the front side of the pad 104 is formed of a harder material than the soft pad 108 on the rear side of the pad 104. For example, the hard pad 106 is formed of a foamed resin having a low expansion ratio, and the soft pad 108 is formed of a foamed resin having a higher expansion ratio than the hard pad 106. Here, the expansion ratio usually means a value obtained by dividing the density of the raw resin before foaming by the apparent density of the foam (pad) after foaming.

  The hard pad 106 is made of a harder material than the soft pad 108, so it is harder to bend than the soft pad 108. Therefore, the front side portion 42 of the belt guide 40 is more difficult to bend than the rear side portion 44 of the belt guide 40. The hard pad 106 and the soft pad 108 may be bonded, for example, to the cylindrical portion 46 by adhesion or the like so as not to be displaced inside the belt guide 102.

  In the vehicle occupant restraint system 100, although not shown, the front side portion 42 of the belt guide 102 is more difficult to bend than the rear side portion 44. It can not pass through the curved portion of P's shoulder S (see FIGS. 5 and 6) and stays in front of the shoulder S of the occupant P. Therefore, the belt guide 102 can be self-fitted to an appropriate position of the occupant regardless of the physical size and the sitting posture of the occupant P, and the clavicle of the occupant can be pushed by the front side portion 42 of the belt guide 102. Therefore, in the vehicle occupant restraint system 100, the load from the shoulder belt portion 22A to the occupant P can be transmitted to the highly durable clavicle.

  In the vehicle occupant restraint system 100, the hard pad 106 on the front side in the longitudinal direction of the pad 104 is formed of a material harder than the soft pad 108 on the rear side in the longitudinal direction of the pad 104. For this reason, it is possible to adjust the ease of bending of the front side portion and the rear side portion of the belt guide 102 with a simple configuration.

Fourth Embodiment
Next, a vehicle occupant restraint system 120 of a fourth embodiment will be described using FIGS. 9 and 10. The same components as those in the first to third embodiments described above are denoted by the same reference numerals and descriptions thereof will be omitted.

  As shown in FIG. 9, the vehicle occupant restraint system 120 is provided with a belt guide 122. Inside the belt guide 122, a pad 124 is provided along the cylindrical portion 46 through which the shoulder belt portion 22A is inserted. Although not shown, the pad 124 is disposed on the side of the occupant seated in the seat. The pad 124 includes a front side 124 B corresponding to the front side 42 of the belt guide 122 and a rear side 124 A corresponding to the rear side 44 of the belt guide 40. As shown in FIGS. 9 and 10, the rear side 124A of the pad 124 is formed with a plurality of holes 130 penetrating in the thickness direction of the rear side 124A. For example, a plurality of holes 130 are arranged in the direction intersecting the longitudinal direction of the pad 124. In the present embodiment, the plurality of holes 130 are arranged in two rows in the direction orthogonal to the longitudinal direction of the pad 124. The front portion 124B of the pad 124 is not provided with a plurality of holes.

  By forming the plurality of holes 130 only in the rear side portion 124A of the pad 124, the front side portion 124B of the pad 124 is more difficult to bend than the rear side portion 124A of the pad 124. Therefore, the front side portion 42 of the belt guide 40 is more difficult to bend than the rear side portion 44 of the belt guide 40. The pad 124 may be joined, for example, by adhesion or the like to the cylindrical portion 46 so that the position does not shift inside the belt guide 122.

  In the vehicle occupant restraint device 120, since the front side portion 42 of the belt guide 122 is more difficult to bend than the rear side portion 44 of the belt guide 122, the same operation as the vehicle occupant restraint devices 10, 100 of the first and third embodiments And have an effect.

  Further, in the vehicle occupant restraint system 120, the pad 124 is set so that the ease of bending of the front side portion 124B and the rear side portion 124A differs depending on the presence or absence of the plurality of holes 130 formed in the thickness direction. . For this reason, it is possible to adjust the ease of bending of the front side portion 124B and the rear side portion 124A of the belt guide 122 with a simple configuration.

Fifth Embodiment
Next, a vehicle occupant restraint system 140 according to the fifth embodiment will be described with reference to FIGS. 13 and 14. The same components as those in the first to fourth embodiments described above are designated by the same reference numerals, and the description thereof will be omitted.

  As shown in FIGS. 13 and 14, the vehicle occupant restraint system 140 includes a belt guide 142. As an example, a pad 104 (see FIG. 8) is provided inside the belt guide 142 along the cylindrical portion 46 through which the shoulder belt portion 22A is inserted. An outer skin 146 is provided on the surface of the belt guide 142 so as to cover the cylindrical portion 46 and the pad 104. The outer skin 146 is provided with a lower surface skin 148 disposed on the side of the occupant P (see FIG. 14) seated on the seat 12. The lower surface skin 148 is formed of a double cloth, and includes a first lower surface skin 148A covering the pad 104 side and a second lower surface skin 148B in contact with the occupant P (see FIG. 14). That is, the second lower surface skin 148B is an example of the lower surface skin in contact with the occupant P in the double cloth. The general part 146A that constitutes the other part of the epidermis 146, that is, the part other than the lower surface epidermis 148, is composed of a single epidermis. In the fifth embodiment, the general part 146A and the first lower surface skin 148A are formed of a continuous cloth of the same material.

  The second lower surface skin 148B in contact with the occupant P (see FIG. 14) is formed of a cloth having a smaller coefficient of friction than the coefficient of friction of the general portion 146A. In the fifth embodiment, since the general portion 146A and the first lower surface skin 148A are formed of the same continuous cloth, the second lower surface skin 148B has a smaller coefficient of friction than the friction coefficient of the first lower surface skin 148A. Is made of cloth.

  Here, a state at the time of a frontal collision in the vehicle occupant restraint system 300 of another comparative example will be described using FIG. 18. As shown in FIG. 18, the vehicle occupant restraint apparatus 300 includes a belt guide 302 through which the shoulder belt portion 22A is inserted. The longitudinal rear end 302 A of the belt guide 302 is fixed to the bezel 34 of the upper portion 16 A of the seat back 16 by a band-shaped fixing member 304. The fixing member 304 is made of, for example, a member having extensibility. The coefficient of friction of the belt guide 302 is approximately the same as the coefficient of friction of the general portion 146A shown in FIG. 13 or greater than the coefficient of friction of the general portion 146A shown in FIG. When the occupant P seated on the seat 12 wears clothes of a material having a large coefficient of friction, the clothes of the occupant P and the belt guide 302 do not slip in a frontal collision, and the belt guide 302 stays in the chest of the occupant P . For this reason, there is a possibility that the belt guide 302 may push the chest of the occupant P as the occupant P moves forward during a frontal collision.

  On the other hand, the vehicle occupant restraint system 140 of the fifth embodiment has the following operations and effects in addition to the operations and effects of the configuration similar to the first to fourth embodiments.

  In the vehicle occupant restraint system 140 of the fifth embodiment, the lower surface skin 148 on the side of the occupant P seated on the seat 12 is made of a double cloth, and the second lower surface on the side in contact with the occupant P of the double cloth. The skin 148 </ b> B is formed of a cloth having a smaller coefficient of friction than the friction coefficient of the general portion 146 </ b> A of the skin 146. Thereby, as shown in FIG. 14, the position where the belt guide 142 faces the clavicle 92 of the occupant P without staying at the initial position (for example, the chest) in contact with the occupant P at the time of forward inclination of the occupant P in a frontal collision. Go to Therefore, the load can be stably transmitted to the clavicle 92 of the occupant P by the front side portion 42 of the belt guide 142, and compression of the chest of the occupant P by the belt guide 142 can be reduced.

Sixth Embodiment
Next, a vehicle occupant restraint system 160 according to a sixth embodiment will be described with reference to FIGS. The same components as those in the first to fifth embodiments described above are denoted by the same reference numerals, and the description thereof will be omitted.

  As shown in FIGS. 15A and 15B, the vehicle occupant restraint system 160 is provided with a belt guide 162. As shown in FIG. As an example, a pad 104 is provided inside the belt guide 162 along the cylindrical portion 46 through which the shoulder belt portion 22A is inserted. An outer surface 166 covering the cylindrical portion 46 and the pad 104 is provided on the surface of the belt guide 162. The skin 166 is provided with a lower skin 168 arranged on the side of the occupant P seated on the seat 12. The lower surface skin 168 is formed of a double cloth, and includes a first lower surface skin 168A covering the pad 104 side and a second lower surface skin 168B in contact with the occupant P. That is, the second lower surface skin 168B is an example of the lower surface skin on the side in contact with the occupant P in the double cloth. The other part of the epidermis 166, that is, the general part 166A that constitutes the part other than the lower surface skin 168 is composed of one surface skin, and the general part 166A and the first lower surface skin 168A are made of the same continuous cloth of the same material. It is formed.

  The second lower surface skin 168B in contact with the occupant P is formed of a cloth that is easier to stretch than the general portion 166A. In the sixth embodiment, since the general portion 166A and the first lower surface skin 168A are formed of the same continuous cloth, the second lower surface skin 168B is formed of a cloth that is easier to stretch than the first lower surface skin 168A. ing.

  The vehicle occupant restraint system 160 according to the sixth embodiment has the following operations and effects in addition to the operations and effects of the same configurations as those of the first to fifth embodiments.

  In the vehicle occupant restraint system 160, as shown in FIG. 15A, the clavicle 92 of the occupant P in which the front side portion 42 of the belt guide 162 is seated on the seat 12 in a normal state (that is, a state at the time of a non-front collision). It is arranged more forward than the vehicle. That is, the rear side portion 44 of the belt guide 40 is disposed at a position facing the clavicle 92 of the occupant P.

  For example, when the friction between the clothes worn by the occupant P seated on the seat 12 and the skin 166 is large, the occupant P seated on the seat 12 at the time of a frontal collision as shown in FIG. When the vehicle moves forward with respect to the vehicle 16 (i.e., in the forward lean position), the second lower surface skin 168B extends, and the belt guide 162 moves toward the vehicle upper and rear with respect to the occupant P. That is, the second lower surface skin 168B remains at the front side portion 42 of the belt guide 162, and the second lower surface skin 168B extends at the rear side portion 44 of the belt guide 162 (see FIG. 16B). Move to the upper side and the rear side of the vehicle with respect to P.

  As shown in FIG. 17A, when the occupant P seated on the seat 12 in the second half of the frontal collision moves further to the vehicle front side with respect to the seat back 16, the second lower surface skin 168B extends further, and the belt guide 162 Further move toward the upper side and the rear side of the vehicle with respect to the occupant P. Thus, the front side portion 42 of the belt guide 162 is disposed in a region facing the clavicle 92 of the occupant P, so that the clavicle 92 of the occupant P can be pushed by the front side portion 42 of the belt guide 162. Therefore, the input load from the shoulder belt portion 22A to the occupant P can be transmitted to the clavicle 92 which is more resistant than the rib 94 at the time of a frontal collision, and compression of the chest of the occupant P by the belt guide 142 can be reduced.

[Supplementary explanation]
In the first embodiment, the connecting portion between the one end 36A of the connecting member 36 and the bezel 34 is cut to fix the rear end 40A of the belt guide 40 in the longitudinal direction and the bezel 34 by the connecting member 36. However, the present invention is not limited to this configuration. For example, the connecting member may be cut at any position in the longitudinal direction of the connecting member when a tension equal to or greater than a predetermined value acts.

  In the first and second embodiments, the rear side 48A of the pad 48 is provided with the plurality of slits 54, but the shape and the number of the slits 54 can be changed. Moreover, although the some slit is not formed in the front side part 48B of the pad 48, this invention is not limited to this structure. For example, the front side of the pad is also formed with a plurality of slits in the longitudinal direction, and the size (for example, depth) of the plurality of slits in the back side of the pad is the size of the plurality of slits in the front side of the pad ( For example, the configuration may be larger than the depth).

  Further, in the fourth embodiment, the plurality of holes 130 are provided on the rear side portion 124A of the pad 124, but the size and the number of the holes 130 can be changed. Moreover, although the some hole part is not formed in the front side part 124B of the pad 124, this invention is not limited to this structure. For example, a plurality of holes may be formed on the front side of the pad, and the size of the plurality of holes on the back side of the pad may be larger than the size of the plurality of holes on the front side of the pad .

  Further, in the fifth and sixth embodiments, the pad 104 and the extensible member 72 are provided, but the present invention is not limited to this configuration. For example, instead of the pad 104, the pad 48 or the pad 124 used in the other embodiments may be provided, and instead of the extensible member 72, the connecting member 36 may be provided.

  In the first to sixth embodiments, the outer shapes of the pads 48, 104, 124 can be changed. In the first to sixth embodiments, the average thickness of the front side of the pads 48, 104, 124 is thicker than the average thickness of the rear sides of the pads 48, 104, 124, but the present invention It is not limited. For example, in the configuration of the pad of the first to sixth embodiments, the thickness may be changed to be uniform on the front side portion and the rear side portion of the pad. Further, the pad may be configured such that the front side portion is less likely to bend than the rear side portion, only by making the front side portion in the longitudinal direction thicker than the rear side portion.

  Moreover, in the first to sixth embodiments, the cylindrical portion 46 through which the shoulder belt portion 22A is inserted is provided, but the present invention is not limited to this configuration. As long as the shoulder belt portion 22A slides in the longitudinal direction, a configuration other than the cylindrical portion may be used. For example, a low friction sheet member may be disposed on the upper side and the lower side of the shoulder belt portion 22A. . Further, the retractor 26 with the pretensioner function may be mounted on the seat back 16.

  It should be noted that although the invention has been described in detail with respect to particular embodiments, the invention is not limited to such embodiments, and it is contemplated that other various embodiments are possible within the scope of the invention. It is clear to the trader.

Reference Signs List 10 vehicle occupant restraint device 12 vehicle seat 16 seat back 20 seat belt device (three-point seat belt device)
22 Seat Belt 22A Shoulder Belt (Shoulder Belt)
32 buckle 34 bezel (shoulder opening)
36 Connecting member (fixed part)
40 Belt guide 40A rear end (longitudinal rear end)
42 front side 44 rear side 46 tubular portion (belt insertion portion)
48 pad 54 slit 70 vehicle occupant restraint device 72 extensible member (fixed portion)
92 clavicle 100 vehicle occupant restraint device 102 belt guide 104 pad 106 hard pad (hard material)
120 Vehicle occupant restraint device 122 Belt guide 124 Pad 130 Hole 140 Vehicle occupant restraint device 142 Belt guide 146 Skin 146A General part 148 Lower surface skin 148B Second lower surface skin (lower surface skin on the side in contact with the occupant)
160 Vehicle Occupant Restraint Device 162 Belt Guide 166 Outer Skin 166A General Part 168 Lower Outer Skin 168B Second lower outer skin (lower outer skin on the side in contact with the occupant)
P crew S shoulder

Claims (7)

A three-point seat belt device including a shoulder belt extending from above the seat width direction one end side of a seat back constituting a vehicle seat on which a passenger sits down toward a buckle at the lower side in the seat width direction other end side;
A belt guide provided on an upper side of one end side of the seat back in the seat width direction, the shoulder belt being inserted, and being disposed along a restraint surface of an occupant seated on the vehicle seat;
A fixing portion configured to fix a longitudinal rear end portion of the belt guide to a shoulder in an upper side of the seat back in the sheet width direction;
The front side of the belt guide provided in the front side in the longitudinal direction and arranged in front of the clavicle of the occupant seated in the vehicle seat in the normal state and being less bendable than the rear side in the longitudinal direction Department,
An occupant restraint system for a vehicle.   The fixing portion is configured to release the fixation between the rear end in the longitudinal direction of the belt guide and the shoulder when a tension equal to or greater than a predetermined value acts, or when the tension equal to or greater than a predetermined value acts. The vehicle occupant restraint system according to claim 1, wherein the vehicle occupant restraint device is configured to extend in accordance with a distance between a longitudinal rear end of the guide and the shoulder opening.   The belt guide includes a belt insertion portion through which the shoulder belt is inserted, and a pad disposed on the side of an occupant seated on the vehicle seat with respect to the belt insertion portion. Or the vehicle occupant restraint device according to claim 2.   The pad is set so that the ease of bending differs depending on the presence or absence of a plurality of slits formed on the side of the occupant seated on the vehicle seat in the thickness direction of the pad or the size of the slits. The vehicle occupant restraint device according to 3.   The vehicle occupant restraint system according to claim 3, wherein the pad is formed of a material whose front side is harder than the rear side, or the front side is formed thicker than the rear side.   The vehicle occupant restraint system according to claim 3, wherein the pad is set so that the ease of bending is different depending on the presence or absence of a plurality of holes formed in the thickness direction of the pad or the size of the holes. .   The skin covering the belt insertion portion and the pad is formed of a double cloth on the lower surface of the occupant sitting on the vehicle seat, and the lower skin on the side contacting the occupant of the double cloth is the above A cloth having a coefficient of friction smaller than that of the general part constituting the other part of the skin, or a cloth which is easier to stretch than the general part constituting the other part of the skin. The vehicle occupant restraint system according to any one of the above.