JP2024119353A - Seat belt structure - Google Patents

Abstract

[Problem] To provide a seat belt structure that allows easy fastening and detachment of the seat belt. [Solution] In a seat belt structure 1 including a seat 3 having a first seat 7R and a second seat 7L aligned in the width direction of a vehicle, and a seat belt 5 for restraining occupants CR, CL seated in the first seat 7R and the second seat 7L, a seat side buckle 15 is provided between the first seat 7R and the second seat 7L of the seat 3, a ceiling side buckle 17 is provided on a ceiling V located above the seat 3, the seat belt 5 has a first belt portion 19 for restraining the occupant CR seated in the first seat 7R and a second belt portion 21 for restraining the occupant CL seated in the second seat 7L, and the first belt portion 19 and the second belt portion 21 are connected to a common tongue 43 that is detachable from the seat side buckle 15 and the ceiling side buckle 17. [Selected Figure] Figure 1

Description

The present invention relates to a seat belt structure.

Conventionally, a known seat belt structure includes a seat with three seats arranged in the width direction and a three-point seat belt that restrains the occupants sitting in the seats (see Patent Document 1). In this seat belt structure, the seat belts for the two outermost seats of the three seats in the seat are each a three-point seat belt. The seat is provided with three buckles for the three seats. Each of the three seat belts is provided with a detachable tongue that is attached to the buckle. In this type of seat belt structure, the seat belt restrains the occupants by attaching the tongue of each seat belt to the corresponding buckle.

JP 2010-18197 A

However, in a seat belt structure like that of Patent Document 1, a seat belt and tongue are provided for each person sitting in the seat, and the seat is provided with a buckle for each tongue. This can make it difficult to know which buckle to fasten the tongue to. In addition, if a passenger needs help fastening or unfastening the seat belt, for example if the passenger is a child or has a physical disability, the passenger must fasten or unfasten the seat belt separately from the passenger, making fastening and unfastening difficult.

The present invention was made in consideration of the problems inherent in the conventional technology. The object of the present invention is to provide a seat belt structure that allows the easy fastening and detachment of the seat belt.

The seat belt structure according to this embodiment includes a seat having a first seat and a second seat aligned in the width direction of the vehicle, and a seat belt for restraining occupants seated in the first seat and the second seat, a seat-side buckle is provided between the first seat and the second seat of the seat, a ceiling-side buckle is provided on the ceiling located above the seat, the seat belt has a first belt portion for restraining the occupant seated in the first seat and a second belt portion for restraining the occupant seated in the second seat, and the first belt portion and the second belt portion are connected to a common tongue that is detachable from the seat-side buckle and the ceiling-side buckle.

The present invention provides a seat belt structure that allows the seat belt to be easily fastened and removed.

1 is a front view of a seat belt structure according to an embodiment of the present invention with a tongue attached to a seat-side buckle and a seat belt restraining an occupant. FIG. 1 is a front view of a seat belt structure according to an embodiment of the present invention with a tongue attached to a ceiling-side buckle and the seat belt releasing the restraint of an occupant. FIG. FIG. 3 is a side view of FIG. 2 . 2 is a perspective view of the tongue of the seat belt structure according to the embodiment when being attached to a seat-side buckle. FIG. 1 is a perspective view of a tongue of the seat belt structure according to the embodiment when the tongue is attached to a ceiling-side buckle and a first retaining portion and a second retaining portion are in a first state. FIG. 4 is a perspective view of the seat belt structure according to the embodiment when the tongue is attached to the ceiling-side buckle and the first retaining portion and the second retaining portion are in a second state. FIG. 1 is a front view of a seat belt structure according to an embodiment of the present invention, in which a tongue is attached to a ceiling-side buckle. FIG. FIG. 8 is a side view of FIG. 1 is a schematic diagram showing a first example of a seat belt configuration of a seat belt structure according to an embodiment of the present invention; FIG. 4 is a schematic diagram showing a second example of the configuration of a seat belt of the seat belt structure according to the present embodiment. FIG. 11 is a schematic diagram showing a third example of the configuration of the seat belt of the seat belt structure according to the present embodiment. FIG. 11 is a schematic diagram showing a fourth example of the configuration of the seat belt of the seat belt structure according to the present embodiment.

The seat belt structure according to this embodiment will be described in detail below with reference to the drawings. Note that the dimensional ratios in the drawings have been exaggerated for the convenience of explanation and may differ from the actual ratios.

As shown in FIG. 1, the seat belt structure 1 according to this embodiment is applied, for example, to the interior of a vehicle. As shown in FIGS. 1 to 8, the seat belt structure 1 includes a seat 3 and a seat belt 5.

As shown in FIG. 4, the seat 3 is used, for example, as a rear seat of a vehicle. The seat 3 has a first seat 7R and a second seat 7L arranged in the width direction for two people. The first seat 7R and the second seat 7L each have a seat surface 9 on which the occupants CR and CL (see FIG. 1) sit, a backrest 11 that supports the backs of the occupants CR and CL, and a headrest 13 that supports the heads of the occupants CR and CL. The seat surface 9, the backrest 11, and the headrest 13 have cushioning properties. The backrest 11 can change the inclination angle relative to the seat surface 9 mechanically or electrically by a lever or button provided on the outer surface of the seat 3. As shown in FIGS. 1 to 8, one seat-side buckle 15 is provided between the first seat 7R and the second seat 7L of the seat 3. One ceiling-side buckle 17 (see FIG. 1) is provided on the ceiling V (see FIG. 1) in the vehicle interior located above the seat 3. The position of the ceiling buckle 17 on the ceiling V is not limited to the same position as the seat buckle 15 in the left-right direction. For example, the ceiling buckle 17 may be positioned to the left of the seat buckle 15, and the seat buckle 15 and the ceiling buckle 17 may be positioned differently in the left-right direction. In addition, the position of the seat buckle 15 on the seat 3 is not limited to the center of the seat 3. For example, if the widths of the first seat 7R and the second seat 7L are different, the seat buckle 15 may be positioned on the seat 3 so as to be located between the first seat 7R and the second seat 7L. As shown in FIG. 1, the occupants CR and CL seated in the first seat 7R and the second seat 7L of the seat 3 are restrained by the seat belt 5.

As shown in Figs. 1 to 8, the seat belt 5 is formed into a belt shape by, for example, weaving high-strength nylon. As shown in Fig. 1, the seat belt 5 restrains the occupants CR and CL seated in the first seat 7R and the second seat 7L in a three-point manner. In the following description, the three points of the three-point system are a lower point located below on the outside of the seat 3, an upper point located above the seat 3, and an inner point fixed to the seat-side buckle 15 on the inside of the seat 3. The seat belt 5 has a three-point first belt portion 19 that restrains the occupant CR seated in the first seat 7R, and a three-point second belt portion 21 that restrains the occupant CL seated in the second seat 7L.

As shown in FIG. 1, the first belt portion 19 restrains the occupant CR sitting in the first seat 7R in a three-point manner, having a first lower point 23, a first upper point 25, and a first inner point 27. The first lower point 23 and the first upper point 25 are provided on the side wall WR inside the vehicle cabin. Between the first lower point 23 and the first inner point 27 is a first lower restraint portion 29 that restrains the occupant CR near the waist. Between the first upper point 25 and the first inner point 27 is a first upper restraint portion 31 that restrains the occupant CR from the shoulders to the waist. The first upper point 25 is provided so as to be movable in the vertical direction relative to the side wall WR inside the vehicle cabin. The first upper point 25 is mechanically or electrically moved in its position relative to the side wall WR by a sensor that detects the load applied to the first belt portion 19 when restraining the occupant CR, or the position of the occupant CR's head, shoulders, etc. when the occupant CR is seated in the first seat 7R. By making the first upper point 25 movable in the vertical direction, the first belt portion 19 can stably restrain the occupant CR in a three-point manner. As shown in FIG. 2, the first upper point 25 is disposed on the ceiling V side of the side wall WR so that the first belt portion 19 does not prevent the occupant CR from getting off the vehicle when the first belt portion 19 is not restraining the occupant CR.

As shown in FIG. 1, the second belt portion 21 restrains the occupant CL seated in the second seat 7L in a three-point manner, having a second lower point 33, a second upper point 35, and a second inner point 37. The second lower point 33 and the second upper point 35 are provided on the side wall WL of the vehicle interior. The second inner point 37 is located at the same position as the first inner point 27. Between the second lower point 33 and the second inner point 37 is a second lower restraint portion 39 that restrains the occupant CL near the waist. Between the second upper point 35 and the second inner point 37 is a second upper restraint portion 41 that restrains the occupant CL from the shoulders to the waist. The second upper point 35 is provided so as to be movable in the vertical direction relative to the side wall WL of the vehicle interior. The second upper point 35 is mechanically or electrically moved in its position relative to the side wall WL by a sensor that detects the load applied to the second belt portion 21 when restraining the occupant CL, or the position of the head, shoulders, etc. when the occupant CL is seated in the second seat 7L. By making the second upper point 35 movable in the vertical direction, the second belt portion 21 can stably restrain the occupant CL in a three-point manner. As shown in FIG. 2, the second upper point 35 is disposed on the ceiling V side of the side wall WL so that the second belt portion 21 does not prevent the occupant CL from getting off the vehicle when the second belt portion 21 is not restraining the occupant CL.

As shown in FIG. 1, the first inner point 27 of the first belt portion 19 and the second inner point 37 of the second belt portion 21 are connected to a common tongue 43. The tongue 43 is detachable from the seat side buckle 15 and the ceiling side buckle 17. When the tongue 43 is inserted into the seat side buckle 15, it is held attached to the seat side buckle 15. When the tongue 43 is attached to the seat side buckle 15, for example, by pressing a release button (not shown) provided on the seat side buckle 15, it is released from the seat side buckle 15. When the tongue 43 is inserted into the ceiling side buckle 17, it is held attached to the ceiling side buckle 17. When the tongue 43 is attached to the ceiling side buckle 17, for example, by pressing a release button (not shown) provided on the ceiling side buckle 17, it is released from the ceiling side buckle 17. In addition, it is advisable to provide release buttons for the seat-side buckle 15 and the ceiling-side buckle 17 on both sides of the seat-side buckle 15 and the ceiling-side buckle 17 so that they can be operated by either adjacent occupant CR or CL.

Here, an example of the configuration of the seat belt 5 is shown below.

9, the first example of the configuration of the seat belt 5 includes one belt 49 in which the first lower restraint section 29 and the first upper restraint section 31 are continuous, and one belt 51 in which the second lower restraint section 39 and the second upper restraint section 41 are continuous. Both ends of the belt 49 are located at the first lower point 23 and the first upper point 25, respectively. At least one of the first lower point 23 and the first upper point 25 is provided with a winding device (not shown) that allows the belt 49 to be pulled out. Both ends of the belt 51 are located at the second lower point 33 and the second upper point 35, respectively. At least one of the second lower point 33 and the second upper point 35 is provided with a winding device (not shown) that allows the belt 51 to be pulled out. The two belts 49, 51 are inserted into the tongue 43 so that the tongue 43 can be located at the first inner point 27 and the second inner point 37 (see FIG. 1).

10, a second example of the configuration of the seat belt 5 includes one belt 53 in which the first upper restraint section 31 and the second upper restraint section 41 are continuous, and one belt 55 in which the first lower restraint section 29 and the second lower restraint section 39 are continuous. Both ends of the belt 53 are located at the first upper point 25 and the second upper point 35, respectively. At least one of the first upper point 25 and the second upper point 35 is provided with a winding device (not shown) that allows the belt 53 to be withdrawn. Both ends of the belt 55 are located at the first lower point 23 and the second lower point 33, respectively. At least one of the first lower point 23 and the second lower point 33 is provided with a winding device (not shown) that allows the belt 55 to be withdrawn. The two belts 53, 55 are each inserted through the tongue 43 so that the tongue 43 can be positioned at the first inner point 27 and the second inner point 37 (see FIG. 1).

11, a third example of the configuration of the seat belt 5 includes one belt 57 in which the first upper restraint section 31 and the second lower restraint section 39 are continuous, and one belt 59 in which the first lower restraint section 29 and the second upper restraint section 41 are continuous. Both ends of the belt 57 are located at the first upper point 25 and the second lower point 33, respectively. At least one of the first upper point 25 and the second lower point 33 is provided with a winding device (not shown) that allows the belt 57 to be withdrawn. Both ends of the belt 59 are located at the first lower point 23 and the second upper point 35, respectively. At least one of the first lower point 23 and the second upper point 35 is provided with a winding device (not shown) that allows the belt 59 to be withdrawn. The two belts 57, 59 are each inserted through the tongue 43 so that the tongue 43 can be positioned at the first inner point 27 and the second inner point 37 (see FIG. 1).

As a fourth example of the configuration of the seat belt 5, as shown in FIG. 12, there are four belts 61, 63, 65, 67 that respectively constitute the first lower restraint section 29, the first upper restraint section 31, the second lower restraint section 39, and the second upper restraint section 41. One end of each of the four belts 61, 63, 65, 67 is disposed at the first lower point 23, the first upper point 25, the second lower point 33, and the second upper point 35, respectively. The first lower point 23, the first upper point 25, the second lower point 33, and the second upper point 35 are provided with a winding device (not shown) that enables each belt to be pulled out. The other ends of the four belts 61, 63, 65, 67 are fixed to the tongue 43 so that the tongue 43 can be positioned at the first inner point 27 and the second inner point 37 (see FIG. 1).

The seat belt 5 configured in this manner is wound up by the winding device when the tongue 43 is detached from the seat-side buckle 15 and the ceiling-side buckle 17. When the seat belt 5 is wound up by the winding device, as shown in FIG. 5, at least the first upper restraint portion 31 and the second upper restraint portion 41 are held in a state in which they are pulled up toward the ceiling V when the tongue 43 is attached to the ceiling-side buckle 17.

When the occupants CR, CL sit in the first seat 7R and the second seat 7L of the seat 3 and use the seat belt 5, the tongue 43 is released from the ceiling buckle 17. Next, as shown in FIG. 1, with the occupants CR, CL sitting in the first seat 7R and the second seat 7L, the tongue 43 is attached to the seat buckle 15. At this time, the first upper point 25 and the second upper point 35 change their positions relative to the side walls WR, WL according to the physique of the occupants CR, CL. With the tongue 43 attached to the seat buckle 15, the first belt portion 19 restrains the occupant CR sitting in the first seat 7R in a three-point manner, and the second belt portion 21 restrains the occupant CL sitting in the second seat 7L in a three-point manner.

When the seat belt 5 is to be released from the occupants CR and CL, the tongue 43 is detached from the seat-side buckle 15. Next, as shown in FIG. 5, the tongue 43 is attached to the ceiling-side buckle 17. At this time, the first upper point 25 and the second upper point 35 are moved toward the ceiling V as shown in FIG. 2, and are placed in a standby position relative to the side walls WR and WL. With the tongue 43 attached to the ceiling-side buckle 17, at least the first upper restraint portion 31 and the second upper restraint portion 41 of the seat belt 5 are held in a state pulled up toward the ceiling V. This makes it possible to prevent the seat belt 5 from interfering with the occupants CR and CL when they exit the vehicle.

In such a seat belt 5, the three-point first belt portion 19 and the three-point second belt portion 21 are connected to a single common tongue 43. Therefore, by attaching one tongue 43 to one seat-side buckle 15, two occupants CR and CL can be simultaneously restrained in a three-point manner by the first belt portion 19 and the second belt portion 21. Therefore, since there is only one seat-side buckle 15 that corresponds to one tongue 43, there is no confusion about which tongue 43 to attach. In addition, by detaching the tongue 43 from the seat-side buckle 15 and attaching one tongue 43 to one ceiling-side buckle 17, the two occupants CR and CL can be simultaneously released from the restraint of the first belt portion 19 and the second belt portion 21. Therefore, the seat belt 5 can be easily attached and detached. In addition, even if a passenger needs assistance fastening or unfastening the seat belt 5, such as when the passenger is a child or has a physical disability, the seat belts 5 for two passengers can be fastened or unfastened at the same time.

The ceiling-side buckle 17 may be provided so as to be movable up and down. The ceiling-side buckle 17 which can be raised and lowered is lowered to near the heads of the occupants CR, CL when the tongue 43 is released from the seat-side buckle 15. By lowering the ceiling-side buckle 17 to near the heads of the occupants CR, CL, the occupants CR, CL can fasten the tongue 43 to the ceiling-side buckle 17 while remaining seated in the first seat 7R and the second seat 7L. The ceiling-side buckle 17 which can be raised and lowered is raised toward the ceiling V side when the tongue 43 is fastened. The ceiling-side buckle 17 which is disposed on the ceiling V side with the tongue 43 fastened is lowered to near the heads of the occupants CR, CL by detection of a sensor or the like when the occupants CR, CL sit in the first seat 7R and the second seat 7L. By lowering the ceiling buckle 17 with the tongue 43 attached to it near the head of the occupant CR, CL, the occupant CR, CL can detach the tongue 43 from the ceiling buckle 17 while remaining seated in the first seat 7R and the second seat 7L. By making the ceiling buckle 17 movable in this way, the tongue 43 can be easily attached to and detached from the ceiling buckle 17.

As shown in FIG. 5, the seat belt 5 is held with the tongue 43 attached to the ceiling-side buckle 17 and the first upper restraint portion 31 and the second upper restraint portion 41 pulled up toward the ceiling V. At this time, the first lower restraint portion 29 and the second lower restraint portion 39 of the seat belt 5 are positioned so as to hang on the backrest portion 11 of the seat 3 (see FIG. 4). If the seat belt 5 is positioned on the backrest portion 11 of the seat 3, the seat belt 5 may get in the way when the occupants CR and CL get out of the vehicle.

Therefore, the ceiling V is provided with a first holding portion 45 and a second holding portion 47 as holding portions for holding the seat belt 5 pulled up toward the ceiling V with the tongue 43 attached to the ceiling buckle 17. As shown in Figs. 3, 5, 6, 7, and 8, the first holding portion 45 and the second holding portion 47 are formed in a hook shape on which the seat belt 5 can be hooked. By forming the first holding portion 45 and the second holding portion 47 in a hook shape, they can be engaged with the underside of the seat belt 5 located on the opposite side of the ceiling V, and the seat belt 5 can be held in a pulled up state toward the ceiling V. As shown in Figs. 1, 2, 5 to 7, the first holding portion 45 is arranged on the ceiling V so as to be movable within any range between the ceiling buckle 17 and the first upper point 25 by a driving source such as an electric motor. The second holding portion 47 is arranged on the ceiling V so as to be movable within any range between the ceiling buckle 17 and the second upper point 35 by a driving source such as an electric motor. The movement of the first holding part 45 and the second holding part 47 is guided, for example, by a rail provided on the ceiling V.

As shown in FIG. 1, the first retaining portion 45 and the second retaining portion 47 are disposed adjacent to the ceiling-side buckle 17 when the tongue 43 is detached from the ceiling-side buckle 17. At this time, although not shown, the first retaining portion 45 and the second retaining portion 47 are accommodated in an accommodating portion provided in the ceiling, and are disposed so that the hook-shaped portion does not interfere with the seat belt 5. The state in which the first retaining portion 45 and the second retaining portion 47 are disposed adjacent to the ceiling-side buckle 17 is referred to as the first state.

As shown in FIG. 5, when the tongue 43 is attached to the ceiling-side buckle 17, the first retaining portion 45 and the second retaining portion 47 come out of the storage portion so that the hook-shaped portion hooks the seat belt 5 and engages with the underside of the seat belt 5. The first retaining portion 45 and the second retaining portion 47 engaged with the seat belt 5 are moved toward the first upper point 25 and the second upper point 35 while maintaining their engagement with the seat belt 5. At this time, the seat belt 5 is pulled up toward the ceiling V by the movement of the first retaining portion 45 and the second retaining portion 47.

As shown in Figures 2, 6 and 7, when the first retaining portion 45 and the second retaining portion 47 are positioned close to the first upper point 25 and the second upper point 35, the seat belt 5 is held in a state pulled up toward the ceiling V. Therefore, when the tongue 43 is fastened to the ceiling-side buckle 17, the seat belt 5 is not positioned on the seat 3, and the seat belt 5 does not interfere with the occupants CR and CL getting out of the vehicle. The state in which the first retaining portion 45 and the second retaining portion 47 are positioned close to the first upper point 25 and the second upper point 35 is referred to as the second state.

When the tongue 43 is released from the ceiling-side buckle 17, the first retaining portion 45 and the second retaining portion 47 in the second state are moved to the first state. The first retaining portion 45 and the second retaining portion 47 in the first state are accommodated in the accommodation portion of the ceiling V. Therefore, when the occupants CR and CL use the seat belt 5, the first retaining portion 45 and the second retaining portion 47 do not interfere with the seat belt 5.

By making the first retaining portion 45 and the second retaining portion 47 movable in this manner, the seat belt 5 can be pulled up toward the ceiling V by the first retaining portion 45 and the second retaining portion 47 without the occupants CR and CL having to operate the seat belt 5. This reduces the burden on the occupants CR and CL.

The ceiling buckle 17 may be disposed on the front side of the vehicle relative to the occupants CR and CL (for example, on the left side in FIG. 3). The rails that guide the movement of the first and second holding parts 45 and 47 may be curved from the ceiling buckle 17 toward the first and second upper points 25 and 35 so as to be positioned around the occupants CR and CL. By disposing the ceiling buckle 17 on the front side, it is possible to prevent the seat belt 5 from interfering with the occupants CR and CL when the tongue 43 is fastened to the ceiling buckle 17. In addition, by forming the rails curved so as to be positioned around the occupants CR and CL, it is possible to prevent the seat belt 5, which is pulled up toward the ceiling V by the movement of the first and second holding parts 45 and 47, from interfering with the occupants CR and CL.

Such a seat belt structure 1 includes a seat 3 having a first seat 7R and a second seat 7L arranged in the width direction of the vehicle, and a seat belt 5 for restraining the occupants CR, CL seated in the first seat 7R and the second seat 7L. A seat-side buckle 15 is provided between the first seat 7R and the second seat 7L of the seat 3. A ceiling-side buckle 17 is provided on the ceiling V located above the seat 3. The seat belt 5 includes a first belt portion 19 for restraining the occupant CR seated in the first seat 7R, and a second belt portion 21 for restraining the occupant CL seated in the second seat 7L. The first belt portion 19 and the second belt portion 21 are connected to a common tongue 43 that is detachable from the seat-side buckle 15 and the ceiling-side buckle 17.

In the seat belt 5, the first belt portion 19 and the second belt portion 21 are connected to a single common tongue 43. Therefore, when one tongue 43 is attached to the seat side buckle 15, two occupants CR and CL can be restrained by the first belt portion 19 and the second belt portion 21 at the same time. Therefore, since there is only one seat side buckle 15 that corresponds to one tongue 43, there is no confusion about which tongue 43 to attach. In addition, when the tongue 43 is detached from the seat side buckle 15 and the single tongue 43 is attached to the ceiling side buckle 17, the two occupants CR and CL can be released from the restraint of the first belt portion 19 and the second belt portion 21 at the same time. Therefore, the seat belt 5 can be easily attached and detached. In addition, even if a passenger needs assistance fastening or unfastening the seat belt 5, such as when the passenger is a child or has a physical disability, the seat belts 5 for two passengers can be fastened or unfastened at the same time.

Therefore, with this type of seat belt structure 1, the seat belt 5 can be easily fastened and detached.

In addition, the ceiling V is provided with a first retaining portion 45 and a second retaining portion 47 that serve as retaining portions for holding the seat belt 5 pulled up toward the ceiling V when the tongue 43 is attached to the ceiling-side buckle 17.

As a result, when the tongue 43 is attached to the ceiling buckle 17, the seat belt 5 is not placed on the seat 3 and does not interfere with the occupants CR and CL getting out of the vehicle.

Furthermore, the first retaining portion 45 and the second retaining portion 47 are arranged to be movable between the ceiling-side buckle 17 and the side walls WR, WL in the vehicle cabin relative to the ceiling V. Furthermore, the first retaining portion 45 and the second retaining portion 47 are arranged close to the ceiling-side buckle 17 when the tongue 43 is detached from the ceiling-side buckle 17. Then, when the tongue 43 is fastened to the ceiling-side buckle 17, the first retaining portion 45 and the second retaining portion 47 engage with the seat belt 5 and are moved toward the side walls WR, WL in the vehicle cabin while maintaining their engagement with the seat belt 5.

As a result, the seat belt 5 can be pulled up toward the ceiling V by the first retaining portion 45 and the second retaining portion 47 without the occupants CR and CL having to operate the seat belt 5, thereby reducing the burden on the occupants CR and CL.

The first belt portion 19 and the second belt portion 21 restrain the occupants CR and CL seated in the first seat 7R and the second seat 7L in a three-point manner. Of the three points of the first belt portion 19 and the second belt portion 21, the first upper point 25 and the second upper point 35, which are upper points located above the seat 3, are provided so as to be movable in the vertical direction. The first upper point 25 and the second upper point 35 are moved upward when the tongue 43 is attached to the ceiling-side buckle 17.

Therefore, the first upper point 25 and the second upper point 35 can change their positions according to the occupants CR, CL sitting in the first seat 7R and the second seat 7L, and the first belt portion 19 and the second belt portion 21 can stably restrain the occupants CR, CL in a three-point manner. In addition, when the first belt portion 19 and the second belt portion 21 are not restraining the occupants CR, CL, the first upper point 25 and the second upper point 35 are positioned on the upper side (toward the ceiling V), thereby preventing the seat belt 5 from interfering with the occupants CR, CL.

Furthermore, the first retaining portion 45 and the second retaining portion 47 are formed in a hook shape.

As a result, the first retaining portion 45 and the second retaining portion 47 can stably retain the seat belt 5, and the seat belt 5 can be stably maintained in a state where it is pulled up toward the ceiling V.

Although the present embodiment has been described above, the present embodiment is not limited to these, and various modifications are possible within the scope of the gist of the present embodiment.

For example, in the seat belt structure according to this embodiment, the first and second retaining parts are movable, but the present invention is not limited to this and the first and second retaining parts may be fixed. In this case, the first and second retaining parts are disposed close to the first and second upper points. With the tongue fastened to the ceiling buckle, the occupant may hold the seat belt located on the seat in the first and second retaining parts. Even with such fixed first and second retaining parts, the seat belt can be held in a state pulled up toward the ceiling.

1 Seat belt structure 3 Seat 5 Seat belt 7R First seat 7L Second seat 15 Seat side buckle 17 Ceiling side buckle 19 First belt portion 21 Second belt portion 25 First upper point 35 Second upper point 43 Tongue 45 First holding portion 47 Second holding portion CR, CL Occupant WR, WL Side wall

Claims (5)

a seat having a first seat and a second seat aligned in a width direction of the vehicle;
seat belts for restraining occupants seated in the first seat and the second seat;
Equipped with
A seat-side buckle is provided between the first seat and the second seat of the seat,
A ceiling buckle is provided on the ceiling located above the seat,
the seat belt includes a first belt portion for restraining an occupant sitting in the first seat and a second belt portion for restraining an occupant sitting in the second seat,
A seat belt structure in which the first belt portion and the second belt portion are connected to a common tongue that is detachable from the seat-side buckle and the ceiling-side buckle. The seat belt structure according to claim 1, wherein the ceiling is provided with a retaining portion that maintains the seat belt pulled up toward the ceiling when the tongue is attached to the ceiling-side buckle. The seat belt structure according to claim 2, wherein the retaining portion is arranged to be movable between the ceiling buckle and a side wall in the vehicle interior relative to the ceiling, is arranged close to the ceiling buckle when the tongue is detached from the ceiling buckle, and engages with the seat belt when the tongue is attached to the ceiling buckle, and is moved toward the side wall in the vehicle interior while maintaining the engagement with the seat belt. The first belt portion and the second belt portion restrain an occupant sitting in the first seat and the second seat in a three-point manner,
Among the three points of the first belt portion and the second belt portion, an upper point located above the seat is provided so as to be movable in the up and down direction,
4. The seat belt structure according to claim 1, wherein the upper point is moved upward in a state in which the tongue is attached to the ceiling-side buckle. The seat belt structure according to claim 2 or 3, wherein the retaining portion is formed in a hook shape.

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