JP2008254666A - Seat belt device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat belt device capable of more effectively restraining an occupant. <P>SOLUTION: The seat belt device is provided with a seat skeleton 12 installed on a cabin floor part 10; a seat belt 14 having one end fixed to a belt anchor point 20 of the cabin floor part 10; and a waist part belt guide member 100a installed on the seat skeleton 12 and guiding the seat belt 14. Thereby, since the motion of the seat belt 14 is restricted not only by the belt anchor point 20 of the cabin floor part 10 but also the waist part belt guide member 100a even at a seat side near an occupant C, deviation of the seat belt 14 is prevented, thereby, the seat belt 14 can be suppressed from being deviated and the occupant C can be more effectively restrained. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a seat belt device, and more particularly to a seat belt device of a type in which at least one end of a seat belt is fixed to a floor portion of a vehicle compartment.

As an automotive seat belt device, for example, in Patent Document 1, a first collision detection unit that detects a collision from the front-rear direction and a retractor are connected by a signal line, and a second collision detection that detects a collision from the left-right direction. The retractor is provided with a lock mechanism that receives the signal from the first collision detection unit and restricts the movement of the seat belt in the retractor, and the buckle has a lock mechanism from the second collision detection unit. By providing a lock mechanism that restricts the movement of the seat belt in response to a signal, a three-point system that locks only the lap belt portion and prevents the shoulder belt portion from being locked against a collision from the left and right of the vehicle. A seat belt device has been proposed.
Japanese Patent No. 3449500

  However, in the above technology, the belt is locked and restrains the occupant in the event of a vehicle collision, but the belt may cause blurring and elongation while restraining the occupant, so the effect of restraining the occupant is insufficient. is there.

  This invention is made | formed in view of this situation, The objective is to provide the seatbelt apparatus which can restrain a passenger | crew more effectively.

  The present invention includes a seat installed on a floor portion of a vehicle compartment of a vehicle, a seat belt having at least one end fixed to the floor portion of the vehicle compartment, and guide means installed on the seat to guide the seat belt. A seat belt apparatus provided.

  According to this configuration, in addition to the seat installed on the floor of the vehicle compartment of the vehicle and the seat belt having at least one end fixed to the floor of the vehicle compartment, the seat belt is guided by being installed on the seat. Because it is provided with guiding means, the movement of the seat belt is restricted not only by the floor of the vehicle compartment but also by the guiding means on the seat side close to the occupant, and it is more effective by preventing seat belt blurring. A passenger can be restrained.

  In this case, it is preferable that the guiding means includes a lock mechanism that can selectively set the seat belt to be guided to either a state in which advancement / retraction is possible or a state in which advancement / retraction is impossible.

  According to this configuration, the lock mechanism of the guiding means can selectively set the guiding seat belt to either a state in which advancement / retraction is possible or a state in which advancement / retraction is impossible. When the seat belt is not restrained, the seat belt can be moved forward and backward with respect to the guiding means, and the movable range of the seat belt can be expanded to facilitate the operation of the seat belt. Further, when restraining the occupant, by making the seat belt incapable of moving forward and backward with respect to the guiding means, the movable range of the seat belt can be narrowed to further prevent the seat belt from blurring.

  In this case, it further comprises winding means for increasing the tension of the seat belt, and the lock mechanism may make the seat belt to be guided unable to advance and retract when the winding means increases the tension of the seat belt. Is preferred.

  According to this configuration, the winding means increases the tension of the seat belt, and the lock mechanism makes the seat belt to be guided unable to advance and retract when the winding means increases the tension of the seat belt. Further, the seat belt to which a greater tension is applied is restricted from blurring and stretching on the seat side near the occupant, and the occupant can be restrained even more effectively. Further, since the seat belt cannot be moved forward and backward on the seat side near the occupant, a restraining force for the occupant can be generated early.

  On the other hand, the lock mechanism can make the seat belt to be guided unable to advance and retreat when an impact greater than a threshold is applied to the vehicle.

  According to this configuration, the lock mechanism makes the seat belt to be guided unable to move forward and backward when an impact greater than the threshold is applied to the vehicle at the time of an accident, etc. When an impact is applied, the seat belt can be prevented from being shaken or stretched, and passenger safety can be improved.

  Alternatively, the seat can be selectively set to either a slidable state or a non-slidable state on the floor of the vehicle compartment, and the lock mechanism can When the seat is slidable on the floor, the seat belt to be guided is made to move forward and backward, and when the seat is not slidable on the floor of the vehicle compartment, the seat belt to be guided is advanced and retracted. It can be made immovable.

  According to this configuration, the seat can be slidable on the floor of the vehicle compartment, and the position of the seat is moved so as to facilitate the convenience of the occupant when getting on and off the vehicle. be able to. In addition, when the seat is slidable on the floor of the vehicle compartment, the lock mechanism is configured to allow the seat belt to be guided to move forward and backward, and thus the movement of the seat position is limited by the seat belt. Can be prevented. On the other hand, since the seat can be brought into a non-slidable state on the floor of the vehicle compartment, the occupant can be supported by fixing the seat during traveling. In addition, the lock mechanism prevents the seat belt from blurring or extending during traveling because the seat belt to be guided cannot be moved forward and backward when the seat cannot slide on the floor of the vehicle compartment. Can be restrained more effectively.

  The seat belt may be a three-point seat belt.

  According to this configuration, the three-point seat belt restrains the occupant's waist and shoulders, and the fourth belt support point is obtained by the guiding means, so that the occupant can be restrained more effectively. it can.

  According to the seat belt device of the present invention, the occupant can be restrained more effectively.

  Hereinafter, a seat belt device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a side view showing the configuration of the seat belt device according to the first embodiment. The seat belt device of the present embodiment is for effectively restraining an occupant in a three-point seat belt in a driver seat and a passenger seat of an automobile.

  As shown in FIG. 1, a seat slide rail portion 11 is disposed on the vehicle compartment floor portion 10. On the seat slide rail portion 11, the seat skeleton 12 is selectively set to either a state where it can slide back and forth on the vehicle compartment floor portion 10 or a state where it is fixed so as not to slide. It is attached so that it is possible. For this reason, it is possible to fix the seat after moving it to a desired position when getting on and off or adjusting the driving posture. A seat cushion portion 13 for supporting the occupant C is attached on the seat skeleton 12. The seat skeleton 12 and the seat cushion portion 13 function as a seat described in the claims.

  One end of the seat belt 14 is fixed to a belt anchor point 20 of the vehicle compartment floor 10. The seat belt 14 is guided in the vicinity of the right waist of the occupant C by a waist belt guiding member 100 a attached to the belt anchor point 20 and the seat frame 12. The seat belt 14 is guided by a buckle (not shown) near the left waist of the occupant C so that the lumbar of the occupant C can be restrained.

  The seat belt 14 guided by the buckle is guided by the shoulder belt support 16 so that the right shoulder of the occupant C can be restrained. The seat belt 14 guided by the shoulder belt support 16 is wound up by the retractor 18. The retractor 18 has a pretensioner mechanism that increases the tension due to the winding of the seat belt at the time of a collision and the like, and a lock mechanism that suppresses the extension of the seat belt. That is, the retractor 18 normally winds up the seat belt 14 so as to apply a certain tension, and increases the tension applied to the seat belt 14 when an impact exceeding a threshold is applied to the vehicle at the time of an accident or the like. Thus, the occupant C can be restrained more firmly. The waist belt guiding member 100a functions as guiding means described in the claims. Further, the retractor 18 functions as a winding means described in the claims.

  FIG. 2 is a side view showing the configuration of the waist belt guiding member according to the first embodiment. As shown in FIG. 2, the waist belt guiding member 100 a according to the present embodiment includes a guiding member body 102 and a guiding member slide portion 104. The guide member main body 102 is supported on the seat frame 12 so as to be rotatable by the guide member support portion 108. One end of the guide member sliding portion 104 is fixed to the belt anchor point 20 together with the seat belt 14. As shown in FIG. 3, the other end of the guide member slide portion 104 is accommodated in the guide member main body 102 so as to be telescopically expandable. In the guide member main body 102, a slide lock mechanism 110 for fixing the guide member slide portion 104 so as not to expand and contract is provided. The guide member slide portion 104 is provided with the guide member main body 102 as shown in FIG. It can be fixed so that it cannot slide inside.

  Returning to FIG. 2, the guiding member main body 102 is provided with a belt guiding port 106 for guiding the seat belt 14. As shown in FIG. 4, a belt lock mechanism 112 for fixing the seat belt 14 to be guided so as not to be able to advance and retreat is provided in the belt guide port 106. As shown in FIG. The belt 14 can be fixed so that it cannot advance and retract. The belt lock mechanism 112 functions as a lock mechanism described in the claims.

  Next, the operation and effect of the seat belt device of the present embodiment will be described. The seat skeleton 12 is slid back and forth on the seat slide rail portion 11 for getting on and off and adjusting the driving posture. At this time, since the slide lock mechanism 110 of the waist belt guide member 100a is not locked, the guide member slide portion 104 can freely expand and contract in accordance with the sliding of the seat skeleton 12. At this time, since the belt lock mechanism 112 of the waist belt guiding member 100a is also not locked, the seat belt 14 can freely move back and forth within the belt guiding port 106, and the seat belt 14 is attached to the seat skeleton 12. There is no hindrance to sliding.

  If an impact exceeding a threshold value is applied to the vehicle in an accident or the like, the retractor 18 increases the tension applied to the seat belt 14. At the same time as the tension applied to the seat belt 14 by the retractor 18 is increased, as shown in FIG. 5, the slide lock mechanism 110 of the waist belt guiding member 100a allows the guiding member sliding portion 104 so that the guiding member sliding portion 104 cannot expand and contract. Lock. Further, at the same time as the tension applied to the seat belt 14 by the retractor 18 is increased, as shown in FIG. 5, the belt lock mechanism 112 of the waist belt guiding member 100a is also moved forward and backward in the belt guiding port 106. The seat belt 14 is locked so that it cannot.

  As shown in FIG. 6, the conventional seat belt 14 is fixed at a belt anchor point 20. For this reason, even after the locking mechanism of the pretensioner or retractor is activated in the event of a collision, the seat belt 14 located near the side of the waist of the occupant C has (1) the belt anchor point 20 to the side of the waist. Swing in the plane perpendicular to the longitudinal direction of the belt, (2) elongation in the longitudinal direction in relation to the elongation (elasticity) of the belt, and (3) sagging of the belt due to loosening when the belt is installed, The effect of restraining the occupant C's waist is reduced.

  This is because the distance from the side of the waist of the occupant C to the belt anchor point 20 set on the vehicle compartment floor 10 is relatively long, such as several tens of centimeters. Even if the locking mechanism of the pretensioner or the retractor is activated due to the extension of the seat belt 14 which is an elastic body or the looseness when the belt is mounted, the seat belt extends at the position of the occupant C next to the waist. Further, there is no point for supporting the seat belt 14 in the middle from the belt anchor point 20 to the side of the waist of the passenger C. For these reasons, the initial restraint of the occupant C may be delayed due to the swing behavior of the seat belt 14 with the belt anchor point 20 as a base point.

  On the other hand, in this embodiment, as shown in FIG. 7, the movement of the seat belt 14 is restricted not only by the belt anchor point 20 of the vehicle compartment floor 10 but also by the waist belt guiding member 100a on the seat side close to the passenger C. Therefore, by preventing the seat belt 14 from blurring, the seat belt 14 can be prevented from shifting and the occupant C can be restrained more effectively. That is, the waist belt guiding member 100a of the present embodiment is a fourth belt support point added to the three-point seat belt mechanism.

  Further, in the present embodiment, the belt lock mechanism 112 of the waist belt guiding member 100a selectively sets the seat belt 14 to be guided to either a state where advancement / retraction is possible or a state where advancement / retraction is impossible. Therefore, when the occupant C is not restrained, the seatbelt 14 can be moved forward and backward with respect to the waist belt guiding member 100a, so that the movable range of the seatbelt 14 is expanded and the operation of the seatbelt 14 is facilitated. be able to. Further, when restraining the occupant C, the seat belt 14 can be moved forward and backward with respect to the waist belt guiding member 100a, thereby narrowing the movable range of the seat belt 14 and further preventing the seat belt 14 from blurring. Can do. Also,

  Further, according to the present embodiment, the retractor 18 increases the tension of the seat belt 14, and the belt lock mechanism 112 advances and retracts the seat belt 14 that is guided when the retractor 18 increases the tension of the seat belt 14. In order to make it impossible to move, the seat belt 14 to which a greater tension is applied is restricted from blurring and extending on the seat side near the occupant C, and the occupant C can be restrained even more effectively. it can. Further, since the seat belt 14 cannot be moved forward and backward on the seat side near the occupant C, the restraining force for the occupant C can be generated early.

  In addition, the belt lock mechanism 112 makes the seat belt 14 to be guided unable to move forward and backward when an impact greater than the threshold is applied to the vehicle at the time of an accident or the like. When an impact is applied, it is possible to prevent the seat belt 14 from being shaken or stretched, and to improve the safety of the passenger C.

  In this embodiment, the three-point seat belt restrains the waist and shoulders of the occupant C, and the fourth belt support point is obtained by the lumbar belt guiding member 100a. Can be restrained.

  In particular, in the present embodiment, the slide lock mechanism 110 locks the guide member slide portion 104 so that the guide member slide portion 104 cannot be expanded and contracted, and the end portion of the guide member slide portion 104 is fixed to the belt anchor point 20. The large load applied to 14 is transmitted directly to the belt anchor point 20 provided on the vehicle compartment floor 10 via the waist belt guiding member 100a without passing through the seat frame 12. Therefore, it is not necessary to significantly reinforce the seat skeleton 12 when the seat belt device of the present embodiment is installed in a conventional vehicle.

  Hereinafter, a second embodiment of the present invention will be described. In this embodiment, when the seat skeleton 12 is fixed so as not to slide on the seat slide rail portion 11 regardless of the operation of the retractor 18, as shown in FIG. The slide lock mechanism 110 of 100a locks the guide member slide portion 104 so that the guide member slide portion 104 cannot expand and contract, and the belt lock mechanism 112 of the waist belt guide member 100a also moves the seat belt 14 forward and backward in the belt guide port 106. The point which locks the seatbelt 14 so that it cannot move is different from the said 1st Embodiment.

  According to the present embodiment, the seat skeleton 12 can be slidable on the vehicle compartment floor 10, and the seat skeleton 12 can be used for convenience of the occupant C when getting on and off. The position can be moved. The belt lock mechanism 112 moves the seat position by the seat belt 14 so that the seat belt 14 to be guided can move forward and backward when the seat is slidable on the vehicle compartment floor 10. Can be prevented from being restricted. On the other hand, the seat skeleton 12 can be in a non-slidable state on the vehicle compartment floor 10, so that the occupant C can be supported by fixing the seat during traveling. In addition, the belt lock mechanism 112 makes the seat belt 14 to be guided unmovable when the seat is not slidable on the vehicle compartment floor 10. And the elongation can be prevented, and the occupant C can be restrained more effectively.

  Hereinafter, a third embodiment of the present invention will be described. FIG. 8 is a side view showing the configuration of the seat belt device according to the third embodiment, and FIG. 9 is a side view showing the configuration of the waist belt guiding member according to the third embodiment. As shown in FIGS. 8 and 9, in this embodiment, the waist belt guide member 100 b does not have the guide member slide portion 104, and the guide member main body 102 is provided only on the seat skeleton 12 by the guide member support portion 108. It is supported so that it can rotate.

  As shown in FIG. 10, similarly to the first embodiment, a belt lock mechanism 112 for fixing the seat belt 14 to be guided so as not to be able to advance and retreat is provided in the belt guide port 106. As shown in FIG. 11, the seat belt 14 can be fixed so that it cannot advance and retract.

  If an impact greater than a threshold is applied to the vehicle in an accident or the like and the tension applied to the seat belt 14 by the retractor 18 is increased, as shown in FIG. 9, the slide lock mechanism 110 of the waist belt guiding member 100b. The guide member slide portion 104 is locked so that the guide member slide portion 104 cannot expand and contract. Further, at the same time as the retractor 18 increases the tension applied to the seat belt 14, as shown in FIG. 10, the belt lock mechanism 112 of the waist belt guiding member 100b also moves the seat belt 14 back and forth within the belt guiding port 106. The seat belt 14 is locked so that it cannot.

  In the present embodiment, since the waist belt guiding member 100b does not have the guiding member slide portion 104, the structure of the waist belt guiding member 100b can be simplified. Further, since the waist belt guiding member 100b is not attached to the vehicle compartment floor 10, the waist belt guiding member 100b can be easily installed. In the present embodiment, a large load generated in the seat belt 14 at the time of a collision is transmitted to a route that is transmitted to the belt anchor point 20 via the seat belt 14 and to a seat attachment point of the vehicle body via the seat skeleton 12. It is transmitted to the vehicle body in two systems with a route. In the present embodiment, by optimizing the balance of the load (rigidity) of these two systems, the reinforcement of the seat skeleton 12 is minimal, and the weight of the seat can be reduced.

  In the present embodiment, as in the second embodiment, regardless of the operation of the retractor 18, when the seat skeleton 12 is fixed so as not to slide on the seat slide rail portion 11, As shown in FIG. 11, the belt lock mechanism 112 of the waist belt guiding member 100 b can lock the seat belt 14 so that the seat belt 14 cannot move forward and backward in the belt guiding port 106.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made.

It is a side view which shows the structure of the seatbelt apparatus which concerns on 1st Embodiment. It is a side view showing composition of a waist belt guidance member concerning a 1st embodiment. It is a figure which shows the internal structure of the waist | hip | lumbar part belt guide member which concerns on 1st Embodiment. It is a figure which shows the internal structure of the waist | hip | lumbar part belt guide member which concerns on 1st Embodiment. It is a figure which shows the operation | movement at the time of the lock | rock of the waist | belt part belt guide member which concerns on 1st Embodiment. It is a figure which shows the effect of the passenger | crew's restraint by the conventional seatbelt apparatus. It is a figure which shows the effect of the restraint of the passenger | crew by the seatbelt apparatus which concerns on 1st Embodiment. It is a side view which shows the structure of the seatbelt apparatus which concerns on 3rd Embodiment. It is a side view which shows the structure of the waist | hip | lumbar part belt guide member which concerns on 3rd Embodiment. It is a figure which shows the internal structure of the waist | hip | lumbar part belt guide member which concerns on 3rd Embodiment. It is a figure which shows the operation | movement at the time of the lock | rock of the waist | belt part belt guide member which concerns on 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Vehicle compartment floor part, 11 ... Seat slide rail part, 12 ... Seat frame | skeleton, 13 ... Seat cushion part, 14 ... Seat belt, 16 ... Shoulder belt support part, 18 ... Retractor, 20 ... Belt anchor point, 100a, DESCRIPTION OF SYMBOLS 100b ... Lumbar belt guide member, 102 ... Guide member main body, 104 ... Guide member slide part, 106 ... Belt guide port, 108 ... Guide member support part, 110 ... Slide lock mechanism, 112 ... Belt lock mechanism, C ... Passenger.

Claims (6)

A seat installed on the floor of the vehicle compartment of the vehicle;
A seat belt having at least one end fixed to the floor of the vehicle compartment;
Guiding means installed on the seat for guiding the seat belt;
A seat belt device comprising: The guide means has a lock mechanism that can selectively set the seat belt to be guided to either a state in which advancement / retraction is possible or a state in which advancement / retraction is impossible,
The seat belt device according to claim 1. A winding means for increasing the tension of the seat belt;
The lock mechanism makes the seat belt to be guided non-advancing and retracting when the winding means increases the tension of the seat belt.
The seat belt device according to claim 2. The lock mechanism makes the seat belt to be guided unable to advance and retract when an impact of a threshold value or more is applied to the vehicle.
The seat belt device according to claim 2 or 3. The seat can be selectively set to either a slidable state or a non-slidable state on the floor of the vehicle compartment,
When the seat is slidable on the floor of the vehicle compartment, the lock mechanism is configured to allow the seat belt to be guided to move forward and backward, and the seat is not slidable on the floor of the vehicle compartment. When the state is possible, the seat belt to be guided is in a state in which it cannot move forward and backward,
The seat belt device according to claim 2 or 3.   The seat belt device according to any one of claims 1 to 5, wherein the seat belt is a three-point seat belt.

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