JP2007191107A - Seat belt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a four-point type seat belt mountable by one hand. <P>SOLUTION: This seat belt 10 is provided with a first retractor 12 provided on one side of a seat width direction, a first belt 14 extending from the first retractor 12 and extending in the seat vertical direction on the one side, a second retractor 26 provided on the other side, a second belt 28 extending from the second retractor 26 and extending in the seat vertical direction on the other side, a first connecting means 18 movable along the first belt 14, a second connecting means 24 mounted on the second belt 28 to be connectable to the first connecting means 18, and a supporting member 32 provided on the other side to position and support the second connecting means 24. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a so-called four-point seat belt device.

Conventionally, as a four-point seat belt device, for example, there is one disclosed in Patent Document 1. In this seat belt device, a belt is pulled out from a retractor at the upper part on one side of the seat and fixed to a buckle at the lower part on one side, and the belt that extends vertically on the other side is latched and attached at the center of the body.
JP 2000-16237 A

  However, the above-described conventional seat belt device has a problem that it is difficult to mount with one hand and the mounting operation is troublesome.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a four-point seat belt device that can be mounted with one hand.

  The seat belt device according to the present invention includes a first retractor provided on one side in the seat width direction, a first belt extending from the first retractor and extending in the seat vertical direction on the one side, and the one side. A second retractor provided on the other side opposite to the second retractor, a second belt extending from the second retractor and extending in the seat vertical direction on the other side, and a first movable along the first belt A second coupling means attached to the second belt and capable of being coupled to the first coupling means, and a support member provided on the other side for positioning and supporting the second coupling means. It is characterized by providing.

  In this seat belt device, the first coupling means is grasped with one hand, the first belt is pulled out from the first retractor, and is coupled with the second coupling means attached to the second belt. At this time, since the second coupling means is positioned and supported by the support member, it can be easily coupled with one hand. Then, the coupled first and second coupling means are moved to the central portion on the wrap. In this way, the four-point seat belt can be easily attached with one hand.

  The support member may be characterized in that the positioning of the second coupling means can be released after the first coupling means and the second coupling means are coupled. If it does in this way, after connecting the 1st and 2nd connecting means, it can move to the central part on a lap.

  A third retractor that is provided on the other side and winds up a second belt extending from the second retractor may be provided, and the second coupling means may be positioned and fixed to the second belt. In this case, the second and third retractors can smoothly move the combined first and second connecting means to the central portion on the lap by the winding and unwinding function of the second belt by the second and third retractors. Can do.

  A fourth retractor capable of electrically winding the first belt extending from the first retractor may be provided. In this way, after the first coupling means is coupled to the second coupling means, the first belt is automatically wound up, so that the coupled first and second coupling means are placed on the wrap. It can be automatically moved to the center, and can be mounted in the same manner as a normal three-point seat belt.

  The fourth retractor may take up the first belt when detecting the coupling between the first coupling means and the second coupling means. In this way, it is possible to automatically move the coupled first and second coupling means to the central portion on the wrap only by coupling the first coupling means with the second coupling means. It becomes.

  The fourth retractor may be configured to wind up the first belt when an abnormality of the vehicle is detected in a state where the first coupling unit and the second coupling unit are coupled. In this way, except for an abnormal time when it is desired to increase the restraint force, the restraint state can be made substantially the same as that of the three-point seat belt at the normal time, and the occupant's uncomfortable feeling due to the belt restraint can be reduced.

  The fourth retractor may be characterized by winding the first belt from the lap belt side. If it does in this way, the combined 1st and 2nd coupling means can be moved to the central part on a lap, suppressing the rise on an abdominal part.

  One end of each of the first and second belts may be connected to an electric winding mechanism, and the other end different from the one end may be connected to a force limiter mechanism. In this way, since the tension of the belt can be adjusted, it is possible to prevent the restraint force from being remarkably lowered due to the lap belt being lifted when subjected to a strong impact.

  A seat belt device according to the present invention includes a first retractor provided on one side in the seat width direction, a first belt extending from the first retractor and extending in the seat vertical direction on the one side, and one side Is provided with a second retractor provided on the other opposite side, a second belt extending from the second retractor and extending in the seat vertical direction on the other side, and movably provided along the first belt. And a coupling means having a slit for slidably locking the two belts.

  In this seat belt device, the first coupling means is grasped with one hand, the first belt is pulled out from the first retractor, and the second belt is locked in the slit of the first coupling means. At this time, since the second belt is merely locked to the slit, it can be easily locked with one hand. And the 1st coupling means by which the 2nd belt was latched by the slit is moved to the center part on a lap. In this way, the four-point seat belt can be easily attached with one hand.

  The other side may be provided with an arm that can extend and contract in the front-rear direction of the seat, and includes an arm that guides the second belt and creates a space between the seat back and the second belt. In this way, the occupant can save the trouble of passing the shoulder through the second belt, and the mounting becomes even easier.

  According to the present invention, it is possible to provide a four-point seat belt device that can be mounted with one hand.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. Moreover, although the following embodiment demonstrates the seatbelt apparatus provided in the vehicle right side seat, it is applicable similarly to the vehicle left side seat.
(First embodiment)

  FIG. 1 is a diagram illustrating a seat belt device according to the present embodiment. As shown in FIG. 1, a seat belt device 10 includes a retractor (first retractor) 12 provided on the right side in the seat width direction, a first belt 14 having one end connected to the retractor 12 and pulled out therefrom, A lap outer anchor 16 for fixing the other end of the belt 14 and a tongue (first coupling means) 18 movable along the first belt 14 are provided.

  The retractor 12 is accommodated in a lower portion in a B pillar (not shown), and a first belt 14 is drawn upward therefrom. The first belt 14 extends toward a lap outer anchor 16 provided on the right side of the seat cushion 22 through a slip joint 20 provided on the upper right side of the seat, and is fixed by the lap outer anchor 16. Yes.

  The tongue 18 is provided to be movable along the first belt 14 through the insertion hole 18a. The latch portion 18b of the tongue 18 is inserted into a buckle 24 described later and latched.

  The seat belt device 10 includes a retractor (second retractor) 26 provided on the left lower side of the seat cushion 22, a second belt 28 having one end connected to the retractor 26 and pulled out from the retractor 26, and the belt 28. A retractor (third retractor) 30 that is connected to the other end of the belt 30 and winds it up, a buckle (second coupling means) 24 that is positioned and fixed to the second belt 28, and a support that positions and supports the buckle 24. Member 32.

  The retractor 30 is directly attached to, for example, the upper left portion of a seat back (not shown), and the second belt 28 extends in the vertical direction between the retractor 30 and the retractor 26. As shown in FIG. 2, the buckle 24 is positioned and fixed to the second belt 28, and is supported by the support member 32 when the seat belt device 10 is not used. The support member 32 is a rectangular tube-shaped member whose inner diameter is reduced downward, and is fixed to the left side portion of the seat cushion 22. The second belt 28 is inserted into the support member 32, and the buckle 24 is supported on the left side of the seat cushion 22 by the buckle 24 being locked to the inner surface of the support member 32.

  Next, the operation and effect of the seat belt device 10 according to the present embodiment will be described.

  In the seat belt device 10, as shown in FIG. 1A, first, the user sits on the seat and passes the left shoulder through the second belt 28. Next, as shown in FIG. 1B, the tongue 18 is grasped with one hand, the first belt 14 is pulled out from the retractor 12, and is combined with the buckle 24 attached to the second belt 28. And as shown in FIG.1 (c), it moves to the center part on a lap | wrap, hold | gripping the tongue 18 and the buckle 24 which were couple | bonded. In this way, the first and second belts 14 and 28 function as a shoulder belt and a lap belt, respectively, and the mounting of the four-point X belt is completed. When releasing the seat belt device 10, the latch connection between the tongue 18 and the buckle 24 is released. As a result, the first belt 14 is wound around the retractor 12, the second belt 28 is wound around the retractor 30 and the retractor 26, and the buckle 24 is supported on the left side portion of the seat cushion 22 by the support member 32. .

  Thus, in the seatbelt apparatus 10 of this embodiment, since the buckle 24 is positioned and supported by the support member 32 on the left side of the seat cushion 22, it can be easily coupled with one hand. And it can move to the center part on a lap | wrap, hold | gripping the tongue 18 and the buckle 24 which were couple | bonded. Therefore, the four-point seat belt can be easily attached with one hand.

Further, since the second belt 28 is wound and fed out by both the retractor 30 and the retractor 26, the combined tongue 18 and buckle 24 can be moved more smoothly to the central portion on the lap.
(Second Embodiment)

  Next, a second embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the element same as above-described embodiment, and the overlapping description is abbreviate | omitted.

  In the seat belt device 40 according to the present embodiment, as shown in FIG. 3, an electric retractor (fourth retractor) 42 having an electric winding function is provided on the right side portion of the seat cushion 22 instead of the lap outer anchor. In the first embodiment described above, the wrap inner anchor 44 is provided on the left side of the seat cushion 22 instead of the retractor, and the buckle is a through buckle 46 that can move along the second belt 28. Different from the seat belt device 10.

  As shown in FIG. 4, the through buckle 46 is obtained by fixing a plate provided with an insertion hole 46 a through which the second belt 28 passes. The through buckle 46 moves along the second belt 28 through the insertion hole 46. The second belt 28 is provided with a pair of fasteners 48 at a predetermined distance in the longitudinal direction to regulate the moving distance of the through buckle 46. The distance between the pair of fasteners 48 is sufficient as long as it is necessary to move the latched tongue 18 and buckle 46 to the center of the wrap.

  The through buckle 46 is provided with a sensor (not shown) that senses that the tongue 18 is latched. When the electric retractor 42 receives a signal from the sensor, the electric retractor 42 winds up the first belt 18 by a predetermined amount. This predetermined amount is a distance required to move the latch-coupled tongue 18 and the buckle 46 to the central portion on the lap, and is set in advance.

  In this seat belt device 40, as shown in FIG. 3A, first, the user sits on the seat and passes the left shoulder through the second belt 28. Next, as shown in FIG. 3B, the tongue 18 is grasped with one hand, the first belt 14 is pulled out from the retractor 12, and is combined with the buckle 46 attached to the second belt 28. Then, a sensor provided in the through buckle 46 detects the latch coupling and sends a winding signal of the first belt 14 to the electric retractor 42. As a result, as shown in FIG. 3C, the first belt 14 is wound up by a predetermined amount, and the combined tongue 18 and buckle 46 move to the central portion on the wrap. In this way, the first and second belts 14 and 28 function as a shoulder belt and a lap belt, respectively, and the mounting of the four-point X belt is completed. When releasing the seat belt device 40, the latch connection between the tongue 18 and the buckle 46 is released. Accordingly, the first belt 14 is wound around the retractor 12, the second belt 28 is wound around the retractor 30, and the through buckle 46 is supported on the left side portion of the seat cushion 22 by the support member 32.

  Thus, also in the seat belt device 40 of the present embodiment, the buckle 46 is positioned and supported on the left side of the seat cushion 22 by the support member 32, so that it can be easily coupled with one hand. And if the tongue 18 and the buckle 46 are couple | bonded, the couple | bonded tongue 18 and the buckle 46 will automatically move to the center part on a lap | wrap. Therefore, the four-point seat belt can be easily attached with one hand by the same operation as a normal three-point seat belt.

  Further, since the buckle is the through buckle 46, the member to which the lower end of the second belt 28 is connected can be the anchor 44 instead of the retractor, and the cost can be reduced.

  In the present embodiment, the first belt 14 is automatically wound by the electric retractor 42 when the sensor provided in the through buckle 46 detects the latch coupling. On the other hand, when the tongue 18 and the buckle 46 are merely latch-coupled, the electric retractor 42 is not operated, and when the vehicle abnormality is detected, the first belt 14 is detected by the electric retractor 42 based on the detection signal. You may make it wind up. In this way, except for an abnormal time when it is desired to increase the restraining force, the restraint state can be made almost the same as that of the three-point seat belt at the normal time, and the occupant's uncomfortable feeling due to the belt restraint can be reduced. In addition, since the first belt 42 is automatically wound up every time after the latch coupling, it is possible to eliminate annoying feeling.

In this case, “abnormal” refers to when the pre-crash sensor is activated, when the VSC (vehicle stabilization control) sensor is activated, or when the ABS (anti-skid control) sensor is activated.
(Third embodiment)

  Next, a third embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the element same as above-described embodiment, and the overlapping description is abbreviate | omitted.

  FIG. 5 is a diagram illustrating the seat belt device 50 according to the present embodiment. As shown in FIG. 5, the seat belt device 50 includes a retractor (first retractor) 52 provided on the right side in the seat width direction, a first belt 14 having one end connected to the retractor 52 and drawn therefrom. An electric retractor (fourth retractor) 42 for winding the other end of the belt 14 and a tongue (first coupling means) 18 movable along the first belt 14 are provided.

  For example, the retractor 52 is directly attached to an upper right portion of a seat back (not shown), and the first belt 14 is drawn downward therefrom. The first belt 14 extends toward the electric retractor 42 provided on the right side of the seat cushion 22.

  The tongue 18 is provided to be movable along the first belt 18 through the insertion hole 18a. The latch portion 18b of the tongue 18 is inserted into a buckle 46 described later and latched.

  The seat belt device 50 includes a lap inner anchor 54 provided on the left lower side of the seat cushion 22, a second belt 28 having one end connected to the lap inner anchor 54 and pulled out from the lap inner anchor 54, and other belts 28. A retractor (second retractor) 56 that is connected to the end and winds and feeds it, a buckle (second coupling means) 46 attached to the second belt 28, and a support member 32 that positions and supports the buckle 46. And.

  The retractor 56 is directly attached to, for example, the upper left portion of a seat back (not shown), and the second belt 28 extends in the vertical direction between the retractor 56 and the lap inner anchor 54. The buckle 46 is a through buckle shown in FIG. The through buckle 46 is provided with a sensor (not shown) that senses that the tongue 18 is latched. The through buckle 46 is supported by the support member 32 when the seat belt device 50 is not used. The support member 32 is a rectangular tube-like member similar to that described in the first and second embodiments, and is fixed to the left side portion of the seat cushion 22. The second belt 28 is inserted into the support member 32, and the buckle 46 is locked to the inner surface of the support member 32, so that the buckle 46 is supported on the left side portion of the seat cushion 22.

  Here, in this embodiment, the retractors 52 and 56 directly attached to the left and right upper portions of the seat back (not shown) both have a force limiter function. Further, the retractor 42 and the wrap inner anchor 54 each have a pretensioner function, and when the vehicle is abnormal, each of the first and second belts 14, 28 can be automatically and automatically wound up by a predetermined amount. it can.

  Next, the operation and effect of the seat belt device 50 according to the present embodiment will be described.

  In this seat belt device 50, as shown in FIG. 5A, first, the user sits on the seat and passes the left shoulder through the second belt 28. Next, as shown in FIG. 5B, the tongue 18 is grasped with one hand, the first belt 14 is pulled out from the retractor 52, and is combined with the buckle 46 attached to the second belt 28. Then, a sensor provided on the buckle 46 senses the latch coupling and sends a winding signal for the first belt 14 to the electric retractor 42. As a result, as shown in FIG. 3C, the first belt 14 is wound up by a predetermined amount, and the combined tongue 18 and buckle 46 move to the central portion on the wrap. In this way, the first and second belts 14 and 28 function as a shoulder belt and a lap belt, respectively, and the mounting of the four-point X belt is completed.

  When releasing the seat belt device 50, the latch connection between the tongue 18 and the buckle 46 is released. As a result, the first belt 14 is wound around the retractor 52, the second belt 28 is wound around the retractor 56, and the through buckle 46 is supported on the left side portion of the seat cushion 22 by the support member 32.

  As described above, in the seat belt device 50 of the present embodiment as well, the buckle 46 is positioned and supported on the left side of the seat cushion 22 by the support member 32, and therefore can be easily combined with one hand. And if the tongue 18 and the buckle 46 are couple | bonded, the couple | bonded tongue 18 and the buckle 46 will automatically move to the center part on a lap | wrap. Therefore, the four-point seat belt can be easily attached with one hand by the same operation as a normal three-point seat belt.

Here, if there is a collision with a strong impact with the seat belt attached, the lap belts 14a and 28a are pulled by the shoulder belts 14b and 28b, and the restraining force may be lowered due to sliding up on the stomach. There is. Therefore, in the seat belt device 50 according to the present embodiment, when the vehicle is abnormal, as shown in FIG. 6A, the electric retractor 42 having the pretensioner function and the wrap inner anchor 54 having the pretensioner function are used as the first. The lap belt portions 14a and 28a of the second belts 14 and 28 are wound up by a predetermined amount. As a result, the tension of the shoulder belt portions 14b and 28b of the first and second belts 14 and 28 is increased. When the occupant begins to move due to the impact and a certain tension or more is applied to the shoulder belt portions 14b and 28b, the force limiter function of the retractors 52 and 56 is actuated as shown in FIG. By feeding the belts 14 and 28 from 56, the tension of the first and second belts 14 and 28 is lowered. As a result, when a load is applied to the shoulder belt portions 14b and 28b from the occupant, the force with which the lap belt portions 14a and 28a are pulled up can be significantly reduced by pulling out more belts from the shoulder side retractors 52 and 56. Thus, the lap belt portions 14a and 28a can be prevented from rising.
(Fourth embodiment)

  Next, a fourth embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the element same as above-described embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 7, the seat belt device 60 according to the present embodiment has a pretensioner function in that an anchor 62 having a force limiter function is provided instead of a retractor provided on the left and right upper portions of a seat back (not shown). It differs from the seat belt device 50 of the third embodiment described above in that a retractor 64 having a pretensioner function is provided instead of the inner anchor.

  As shown in FIG. 8, the anchors 62 are bent portions 62a bent so as to meander a thin plate a plurality of times, and are connected to one end of the belts 14 and 28 and the seat back provided at both ends of the bent portions 62a. Part 62b. The material, thickness, meandering length, and the like of the anchor 62 are appropriately selected so as to withstand a necessary load.

  Next, functions and effects of the seat belt device 60 according to the present embodiment will be described.

  In this seat belt device 60, as shown in FIG. 7A, first, the user sits on the seat and passes the left shoulder through the second belt 28. Next, as shown in FIG. 7B, the tongue 18 is grasped with one hand, the first belt 14 is pulled out from the electric retractor 42, and is combined with the buckle 46 attached to the second belt 28. Then, a sensor provided on the buckle 46 senses the latch coupling and sends a winding signal for the first belt 14 to the electric retractor 42. As a result, as shown in FIG. 7C, the first belt 14 is wound up by a predetermined amount, and the combined tongue 18 and buckle 46 move to the central portion on the wrap. In this way, the first and second belts 14 and 28 function as a shoulder belt and a lap belt, respectively, and the mounting of the four-point X belt is completed.

  When releasing the seat belt device 60, the latch connection between the tongue 18 and the buckle 46 is released. As a result, the first belt 14 is wound around the electric retractor 42, the second belt 28 is wound around the retractor 64, and the through buckle 46 is supported by the left side portion of the seat cushion 22 by the support member 32.

  As described above, also in the seat belt device 60 of the present embodiment, the buckle 46 is positioned and supported by the support member 32 on the left side portion of the seat cushion 22, and thus can be easily combined with one hand. And if the tongue 18 and the buckle 46 are couple | bonded, the couple | bonded tongue 18 and the buckle 46 will automatically move to the center part on a lap | wrap. Therefore, the four-point seat belt can be easily attached with one hand by the same operation as a normal three-point seat belt.

  Here, if there is a collision with a strong impact with the seat belt attached, the lap belts 14a and 28a are pulled by the shoulder belts 14b and 28b, and the restraining force may be lowered due to the upper part of the stomach. There is. Therefore, in the seat belt device 60 of the present embodiment, when the vehicle is abnormal, as shown in FIG. 9A, the electric retractor having a pretensioner function and the retractor 64 having a pretensioner function are used as the first and the first. The lap belt portions 14a, 28a of the second belt 14, 28 are automatically and automatically wound up by a predetermined amount. As a result, the tension of the shoulder belt portions 14b and 28b of the first and second belts 14 and 28 is increased. When the occupant begins to move due to the impact and a certain tension or more is applied to the shoulder belt portions 14b and 28b, the force limiter function of the anchor 62 is activated as shown in FIG. The tension of the first and second belts 14 and 28 is lowered by extending the belt 62a and feeding the belt. Thereby, when a load is applied to the shoulder belt portions 14b and 28b from the occupant, the force with which the lap belt portions 14a and 28a are pulled up can be significantly reduced by pulling out more belts from the shoulder-side anchor 62. Further, it is possible to prevent the lap belt portions 14a and 28a from sliding up.

Further, since the force limiter function can be realized by the simple structure of the anchor 62, the cost can be reduced, the weight can be reduced, and the system can be simplified.
(Fifth embodiment)

  Next, a fifth embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the element same as above-described embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 10, the seat belt device 70 according to the present embodiment is provided with a service arm 72 that guides the second belt 28 in the upper left portion of the seat back 23. It is different from the seat belt device 60.

  The service arm 72 includes an arm portion 72a that is extendable in the front-rear direction of the seat, a guide plate 72b that is attached to the tip of the arm portion 72a and has an insertion hole through which the second belt 28 is inserted. have.

  In the seat belt device 70 of the present embodiment, as shown in FIG. 10A, the second belt 28 is guided and lifted by the guide plate 72b as the arm portion 72a extends when the occupant sits on the seat. A space is generated between the seat back 23 and the second belt 28. Thus, the occupant can easily pass the shoulder through the second belt 28. Then, the tongue 18 and the buckle 46 are latch-coupled, the first belt 14 is taken up by the retractor 42, the second belt 28 is pulled out from the retractor 64, and then according to the amount of belt pulled out from the retractor 64. Thus, as shown in FIG. 10B, the arm portion 72a contracts. Thereby, the 2nd belt 28 follows a passenger | crew's shoulder.

  In addition, when the latch connection between the tongue 18 and the buckle 46 is released, the arm portion 72b is moved according to the belt amount of the second belt 28 wound by the retractor 64, as shown in FIG. Elongate. Thus, the occupant can easily remove the shoulder from the second belt 28.

As described above, according to the seat belt device 70 of the present embodiment, it is possible to save time and effort for the occupant to put the shoulder through and remove the shoulder from the second belt 28, and it becomes easier to attach and remove. Other functions and effects are the same as those of the fourth embodiment.
(Sixth embodiment)

  Next, a sixth embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the element same as above-described embodiment, and the overlapping description is abbreviate | omitted.

  FIG. 11 is a diagram illustrating the seat belt device according to the present embodiment. As shown in FIG. 11, the seat belt device 80 includes a retractor (first retractor) 12 provided on the right side in the seat width direction, a first belt 14 having one end connected to the retractor 12 and drawn therefrom. A lap outer anchor 16 for fixing the other end of the belt 14 and a tongue (first coupling means) 82 movable along the first belt 14 are provided.

  The retractor 12 is accommodated in a lower portion in a B pillar (not shown), and a first belt 14 is drawn upward therefrom. The first belt 12 extends toward a lap outer anchor 16 provided on the right side of the seat cushion 22 through a slip joint 20 provided on the upper right side of the seat, and is fixed by the lap outer anchor 16. Yes.

  The tongue 82 is provided so as to be movable along the first belt 14 through the insertion hole 82a. As shown in FIG. 12, the tongue 82 is provided with a slit portion 82b by notching a part of the upper part of the plate. The first belt 14 and the second belt 28 are coupled to each other by inserting and locking the second belt 28 described later into the slit portion 82b.

  Further, the seat belt device 80 includes a retractor (second retractor) 30 provided at the upper left portion of the seat, a second belt 28 having one end connected to the retractor 30 and pulled out from the retractor 30, and the other end of the belt 28 having the other end. And a wrap inner anchor 44 to be fixed.

  The retractor 30 is directly attached to, for example, the upper left portion of a seat back (not shown), and the second belt 28 is vertically moved between the retractor 30 and a lap inner anchor 44 provided on the left lower side of the seat cushion 22. Extending in the direction.

  Next, operations and effects of the seat belt device 80 according to the present embodiment will be described.

  In the seat belt device 80, as shown in FIG. 11A, first, the user sits on the seat and passes the left shoulder through the second belt. Next, as shown in FIG. 11 (b), the tongue 82 is grasped with one hand, the first belt 14 is pulled out from the retractor 12, the second belt 28 is passed through the slit 82 b of the tongue 82, and the first belt 14. And the second belt 28. And as shown in FIG.11 (c), it moves to the center part on a lap | wrap, hold | gripping the tongue 82 which latched the 2nd belt 28. FIG. In this way, the first and second belts 14 and 28 function as a shoulder belt and a lap belt, respectively, and the mounting of the four-point X belt is completed. When releasing the seat belt device 80, the second belt 28 is removed from the slit 82b of the tongue 82. As a result, the first belt 14 is wound around the retractor 12 and the second belt 28 is wound around the retractor 30.

  Thus, in the seat belt device 80 of the present embodiment, the tongue 82 has the slit 82b through which the second belt 28 is inserted. Therefore, the first belt 14 and the second belt 28 are connected through the slit 82b. Can be easily combined with one hand. And it can be made to move to the center part on a lap, holding the tongue 82 in which the 2nd belt 28 was penetrated. Therefore, the four-point seat belt can be easily attached with one hand.

  In addition, since the seat belt device 80 that can be mounted with one hand can be configured by the two retractors 12 and 30 and the tongue 82 having the slit 82b, cost reduction, weight reduction, and simplification of the system can be achieved. Can do.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the service arm 72 of the seat belt device 70 according to the fifth embodiment is applicable to the seat belt devices of other embodiments.

It is a figure which shows the seatbelt apparatus which concerns on 1st Embodiment, and its attachment procedure. It is a figure which shows a mode that the buckle attached to the belt by the supporting member is supported. It is a figure which shows the seatbelt apparatus which concerns on 2nd Embodiment, and its attachment procedure. It is a figure which shows the mode of a coupling | bonding of a through buckle and a tongue. It is a figure which shows the seatbelt apparatus which concerns on 3rd Embodiment, and its attachment procedure. It is a figure which shows the mode of adjustment of the belt tension in emergency. It is a figure which shows the seatbelt apparatus which concerns on 4th Embodiment, and its attachment procedure. It is a perspective view which shows an anchor with a force limiter function. It is a figure which shows the mode of adjustment of the belt tension in emergency. It is a figure which shows the seatbelt apparatus which concerns on 5th Embodiment, and its attachment procedure. It is a figure which shows the seatbelt apparatus which concerns on 6th Embodiment, and its attachment procedure. It is a figure which shows the state which latched the 2nd belt to the slit of a tongue.

Explanation of symbols

10, 40, 50, 60, 70, 80 ... seat belt device, 12, 26, 30, 52, 56, 64 ... retractor, 14 ... first belt, 18, 82 ... tongue, 24, 46 ... buckle, 28 ... second belt, 32 ... support member, 42 ... electric retractor, 44,54 ... wrap inner anchor, 62 ... anchor, 72 ... service arm.

Claims (10)

A first retractor provided on one side in the sheet width direction;
A first belt extending from the first retractor and extending in the seat vertical direction on the one side;
A second retractor provided on the other side opposite to the one side;
A second belt extending from the second retractor and extending in the seat vertical direction on the other side;
First coupling means movable along the first belt;
Second coupling means attached to the second belt and connectable to the first coupling means;
A support member provided on the other side for positioning and supporting the second coupling means;
A seat belt device comprising:   2. The seat according to claim 1, wherein the support member can release the positioning of the second coupling means after the first coupling means and the second coupling means are coupled. 3. Belt device. A third retractor that winds up the second belt provided on the other side and extending from the second retractor;
The seat belt device according to claim 1 or 2, wherein the second coupling means is positioned and fixed to the second belt.   The seat belt device according to any one of claims 1 to 3, further comprising a fourth retractor capable of electrically winding the first belt extending from the first retractor.   The seat belt device according to claim 4, wherein the fourth retractor winds up the first belt when detecting the coupling between the first coupling means and the second coupling means. .   The fourth retractor winds up the first belt when an abnormality of the vehicle is detected in a state where the first coupling means and the second coupling means are coupled. Item 5. The seat belt device according to Item 4.   The seat belt device according to any one of claims 4 to 6, wherein the fourth retractor winds up the first belt from a lap belt side.   The one end of each of the first and second belts is connected to an electric winding mechanism, and the other end different from the one end is connected to a force limiter mechanism. The seatbelt apparatus in any one of -7. A first retractor provided on one side in the sheet width direction;
A first belt extending from the first retractor and extending in the seat vertical direction on the one side;
A second retractor provided on the other side opposite to the one side;
A second belt extending from the second retractor and extending in the seat vertical direction on the other side;
A coupling means provided with a slit that is movably provided along the first belt and slidably engages the second belt;
A seat belt device comprising: An arm provided on the other side so as to be extendable in the front-rear direction of the seat, and that guides the second belt to create a space between the seat back and the second belt. The seatbelt apparatus in any one of 1-9.

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