JP2010058679A - Occupant restraining device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the freedom of the arrangement position of retractors and to make appropriate the fastening position of lap belts and shoulder belts to an occupant, in an occupant restraining device in which right and left lap belts and right and left shoulder belts for restraining the occupant can be pulled out of the retractors. <P>SOLUTION: The retractors 22, 24, 26, 28 are arranged at each take-up side end of a right and left pair of the lap belts 14, 16 and a right and left pair of the shoulder belts 18, 20. When each belt is pulled out, advanced length of each belt is detected with retractor motors 32, 34, 36, 38 (detection means). By making an ECU 40 (a control means) operate each retractor motor 32, 34, 36, 38 (drive means) based on the advanced length, a difference of the advanced length between the right and left lap belts 14, 16 and a difference of the advanced length between the right and left shoulder belts 18, 20 can each be reduced. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an occupant restraint device.

As a lap side retractor that winds up the left and right lap belts of a four-point seat belt, a winding shaft that is parallel to each other and winds the lap belts in opposite directions of rotation and a winding shaft that meshes with each other are provided. A pair of gears and a torsion spring that elastically biases one winding shaft in the direction of winding the lap belt, and by synchronizing the winding of both lap belts, An identical structure is disclosed (see Patent Document 1).
JP 2004-330977 A JP 2004-330975 A JP 2000-16234 A Japanese Patent Laid-Open No. 10-278738

  However, in the above-described conventional example, in order to synchronize the winding of the left and right lap belts, the two winding shafts have a pair of gears that mesh with each other, so both winding shafts are arranged close to each other. It is necessary to install, and the arrangement position of both winding shafts is limited.

  In consideration of the above facts, the present invention increases the degree of freedom of the position of the retractor in the occupant restraint device capable of pulling out the left and right lap belts and the left and right shoulder belts for restraining the occupant from the retractor. It is an object of the present invention to make it possible to optimize the mounting positions of the lap belt and the shoulder belt.

  The invention of claim 1 includes a pair of left and right lap belts corresponding to the waist of an occupant seated on a vehicle seat, a pair of left and right shoulder belts connected to the lap belt and corresponding to the chest of the occupant, and the wrap. The wrap belt and the shoulder belt are disposed at the winding side end portions of the belt and the shoulder belt, respectively configured to be capable of winding the lap belt and the shoulder belt, and at least wind up the lap belt and the shoulder belt, respectively, by driving means. A retractor that can be driven in a direction, detection means that can detect the feeding length of the lap belt and the shoulder belt, respectively, and based on the feeding length of the lap belt and the shoulder belt detected by the detection means, Difference in feeding length of the lap belt and feeding length of the left and right shoulder belts The difference is and a control means for operating the drive means of each so as to reduce each.

  In the occupant restraint device according to the first aspect, the pair of left and right lap belts for restraining the occupant and the pair of left and right shoulder belts can be pulled out from the retractor. Since this retractor is disposed at the winding side end of each of the pair of left and right lap belts and the pair of left and right shoulder belts, the degree of freedom of the position of the retractor can be increased.

  An occupant seated on a vehicle seat can pull out the lap belt and the shoulder belt from each retractor when the pair of left and right lap belts and the pair of left and right shoulder belts are worn. At this time, the feeding length of each lap belt and each shoulder belt is detected by the detecting means. Based on the detected feeding length, the control means operates the retractor driving means, so that the difference between the feeding lengths of the left and right lap belts and the difference of the feeding lengths of the left and right shoulder belts are reduced. In an occupant restraint device capable of pulling out the left and right lap belts and left and right shoulder belts for restraining the occupant from the retractor, the mounting positions of the lap belt and the shoulder belt with respect to the occupant can be optimized.

  According to a second aspect of the present invention, in the occupant restraint device according to the first aspect, the control means detects that the feeding lengths of the left and right lap belts detected by the detection means are equal and are detected by the detection means. Each drive means is operated so that the feeding lengths of the left and right shoulder belts are equal.

  In the occupant restraint device according to the second aspect, when the pair of left and right lap belts and the left and right shoulder belts are pulled out from the retractor, the feeding lengths of the lap belts and the shoulder belts are respectively detected by the detecting means. The control means operates each driving means so that the feeding lengths of the left and right lap belts detected by the detection means are equal, and the feeding lengths of the left and right shoulder belts detected by the detection means are equal. For this reason, the mounting position of the lap belt and the shoulder belt with respect to the occupant can be optimized.

  According to a third aspect of the present invention, in the occupant restraint device according to the first aspect, the control means is configured to control the occupant based on the feeding lengths of the left and right lap belts and the left and right shoulder belts detected by the detection means. And the respective driving means are operated so that the feeding length of the lap belt and the feeding length of the shoulder belt are respectively appropriate lengths corresponding to the physique.

  In the occupant restraint device according to the third aspect, when the pair of left and right lap belts and the left and right shoulder belts are pulled out from the retractor, the feeding lengths of the lap belts and the shoulder belts are respectively detected by the detecting means. The control means estimates the physique of the occupant based on the feeding lengths of the left and right lap belts and the left and right shoulder belts detected by the detecting means, and the feeding length of the lap belt and the feeding length of the shoulder belt are respectively the physique. Each drive means is actuated so as to have an appropriate length corresponding to. For this reason, the mounting position of the lap belt and the shoulder belt with respect to the occupant can be optimized according to the physique of the occupant.

  As described above, according to the occupant restraint device according to claim 1 of the present invention, in the occupant restraint device capable of pulling out the left and right lap belts and the left and right shoulder belts for restraining the occupant from the retractor, In addition to increasing the degree of freedom of the arrangement position, it is possible to obtain an excellent effect that it is possible to optimize the mounting position of the lap belt and the shoulder belt with respect to the occupant.

  According to the occupant restraint device according to the second aspect of the present invention, it is possible to obtain an excellent effect that the positions where the lap belt and the shoulder belt are attached to the occupant can be optimized.

  According to the occupant restraint device according to the third aspect of the present invention, it is possible to obtain an excellent effect that the positions where the lap belt and the shoulder belt are attached to the occupant can be optimized according to the physique of the occupant.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, an occupant restraint device 10 according to the present embodiment is a so-called four-point seat belt device provided on a vehicle seat 12, and as shown in FIG. 3, a pair of left and right lap belts 14, 16 A pair of left and right shoulder belts 18, 20, retractors 22, 24, 26, 28, retractor motors 32, 34, 36, 38 as an example of detection means, and ECU (Electronic Control Unit) 40 as an example of control means. And have.

  The pair of left and right lap belts 14 and 16 are non-extensible belt-like bodies corresponding to the waist 42W (FIG. 2) of the occupant 42 seated on the vehicle seat 12, for example, both side portions of the seat cushion 44 in the vehicle seat 12. It can be pulled out from each. For example, a buckle device 50 is connected to the tip of the lap belt 14 on the right side of the vehicle. For example, a tongue plate 46 is connected to the tip of the lap belt 16 on the left side of the vehicle. As shown in FIG. 2, when the occupant 42 wears the lap belts 14 and 16 and the shoulder belts 18 and 20, the tongue plate 46 is inserted into the buckle device 50 and fixed. The buckle device 50 is provided with a buckle switch (not shown) capable of detecting the fixation of the tongue plate 46. When the tongue plate 46 is correctly inserted into the buckle device 50, for example, A buckle fixing signal is transmitted to the ECU 40.

  In FIG. 1, the pair of left and right shoulder belts 18 and 20 are connected to the lap belts 14 and 16, respectively, and are non-extensible belt-like bodies corresponding to the chest portion 42C (FIG. 2) of the occupant 42. The seat back 48 can be pulled out from above. Specifically, the front end of the shoulder belt 18 on the right side of the vehicle is connected to the buckle device 50, and the front end of the shoulder belt 20 on the left side of the vehicle is connected to the tongue plate 46. Through holes 30 and 31 that allow the shoulder belts 18 and 20 to enter and exit from the inside of the seat back 48 to the outside are formed in the upper portion of the seat back 48.

  The retractors 22, 24, 26, and 28 are disposed at the winding side end portions of the lap belts 14 and 16 and the shoulder belts 18 and 20, respectively, and the wrap belts 14 and 16 and the shoulder belts 18 and 20 are wound respectively. The lap belts 14, 16 and the shoulder belts 18, 20 can be driven in at least the winding direction by retractor motors 32, 34, 36, 38 as an example of drive means. .

  The retractors 22 and 24 are disposed, for example, at the lower rear portion of the seat cushion 44 in the vehicle seat 12 so as to be separated in the vehicle width direction. The retractor 22 is disposed on the right side of the vehicle corresponding to the winding side end of the lap belt 14 on the right side of the vehicle, and the retractor 24 is disposed on the left side of the vehicle corresponding to the winding side end of the lap belt 16 on the left side of the vehicle. Has been.

  On the other hand, the retractors 26 and 28 are disposed, for example, at an upper portion in the seat back 48 of the vehicle seat 12 so as to be separated in the vehicle width direction. The retractor 26 is disposed on the right side of the vehicle corresponding to the winding side end of the shoulder belt 18 on the right side of the vehicle, and the retractor 28 is disposed on the left side of the vehicle corresponding to the winding side end of the shoulder belt 20 on the left side of the vehicle. Has been.

  In the retractor 22, a spool 52 capable of winding the lap belt 14 on the right side of the vehicle and a retractor motor 32 capable of driving the spool 52 at least in the winding direction of the lap belt 14 are disposed. A gear 54 is attached to the rotation shaft of the spool 52, and a gear 55 is attached to the rotation shaft of the retractor motor 32. The gears 54 and 55 mesh with each other directly or indirectly so that the driving force of the retractor motor 32 is transmitted to the spool 52. In the present embodiment, the retractor motor 32 is configured to be able to drive the spool 52 not only in the winding direction of the lap belt 14 but also in the feeding direction of the lap belt 14.

  In the retractor 24, a spool 56 capable of winding the lap belt 16 on the left side of the vehicle and a retractor motor 34 capable of driving the spool 56 in at least the winding direction of the lap belt 16 are disposed. A gear 58 is attached to the rotating shaft of the spool 56, and a gear 60 is attached to the rotating shaft of the retractor motor 34. The gears 58 and 60 mesh with each other directly or indirectly so that the driving force of the retractor motor 34 is transmitted to the spool 56. In the present embodiment, the retractor motor 34 is configured to be able to drive the spool 56 not only in the winding direction of the lap belt 16 but also in the feeding direction of the lap belt 16.

  In the retractor 26, a spool 62 that can wind up the shoulder belt 18 on the right side of the vehicle, and a retractor motor 36 that can drive the spool 62 at least in the winding direction of the shoulder belt 18 are disposed. A gear 64 is attached to the rotation shaft of the spool 62, and a gear 66 is attached to the rotation shaft of the retractor motor 36. The gears 64 and 66 mesh with each other directly or indirectly so that the driving force of the retractor motor 36 is transmitted to the spool 62. In the present embodiment, the retractor motor 36 is configured to be able to drive the spool 62 not only in the winding direction of the shoulder belt 18 but also in the feeding direction of the shoulder belt 18.

  In the retractor 28, a spool 68 capable of winding the shoulder belt 20 on the left side of the vehicle and a retractor motor 38 capable of driving the spool 68 at least in the winding direction of the shoulder belt 20 are disposed. A gear 70 is attached to the rotation shaft of the spool 68, and a gear 72 is attached to the rotation shaft of the retractor motor 38. The gears 70 and 72 mesh with each other directly or indirectly so that the driving force of the retractor motor 38 is transmitted to the spool 68. In the present embodiment, the retractor motor 38 is configured to be able to drive the spool 68 not only in the winding direction of the shoulder belt 20 but also in the feeding direction of the shoulder belt 20.

  The retractor motors 32 and 34 serve not only as driving means but also as detecting means capable of detecting the feeding lengths of the lap belts 14 and 16, respectively. Further, the retractor motors 36 and 38 serve not only as drive means but also as detection means capable of detecting the lengths of the shoulder belts 18 and 20 respectively. The retractor motor 32 will be described as an example. When the occupant 42 pulls out the lap belt 14, the spool 52 of the retractor 22 rotates. The rotation of the spool 52 is transmitted to the retractor motor 32 through the gears 54 and 55, and the rotation shaft of the retractor motor 32 is driven. The feeding length of the lap belt 14 can be calculated by detecting the rotation angle of the rotating shaft. The same applies to the retractor motors 34, 36, and 38. Accordingly, the retractor motors 32, 34, 36, and 38 can detect the feeding lengths of the lap belts 14 and 16 and the shoulder belts 18 and 20, respectively.

  The ECU 40 determines the feeding lengths of the left and right lap belts 14 and 16 based on the feeding lengths of the lap belts 14 and 16 and the shoulder belts 18 and 20 detected by the retractor motors 32, 34, 36, and 38 as an example of the detecting means. The retractor motors 32, 34, 36, and 38, which are examples of the respective drive means, are operated so that the difference and the difference between the feeding lengths of the left and right shoulder belts 18 and 20 are reduced.

  Specifically, the ECU 40 determines the occupant 42 based on the extended lengths of the left and right lap belts 14 and 16 and the left and right shoulder belts 18 and 20 detected by the retractor motors 32, 34, 36, and 38 as an example of a detecting unit. The driving means are operated so that the feeding lengths of the lap belts 14 and 16 and the feeding lengths of the shoulder belts 18 and 20 become appropriate lengths corresponding to the physiques, respectively. Further, at this time, the ECU 40 operates each driving means so that the feeding lengths of the left and right lap belts 14, 16 are equal and the feeding lengths of the left and right shoulder belts 18, 20 are equal.

  In addition, the vehicle seat 12 is provided with an occupant detection sensor (not shown) that can detect the seating of the occupant 42. In addition, for example, a meter panel (not shown), not shown, is provided with a seat belt meter lamp (not shown) that lights up when the feeding length of the seat belt (the lap belts 14 and 16 and the shoulder belts 18 and 20) is being adjusted. Yes.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 1, in the occupant restraint device 10 according to the present embodiment, a pair of left and right lap belts 14 and 16 and a pair of left and right shoulder belts 18 and 20 for restraining occupants are respectively provided from the retractors 22, 24, 26 and 28. It can be withdrawn. The retractors 22, 24, 26, 28 are disposed at the winding side end portions of the pair of left and right lap belts 14, 16 and the pair of left and right shoulder belts 18, 20, so that the retractors 22, 24, The freedom degree of the arrangement position of 26 and 28 can be raised. In other words, in the present embodiment, the retractors 22, 24, 26, and 28 are made independent to increase the degree of freedom of the arrangement.

(Control for normal wearing)
Next, in FIGS. 1 and 3, control by the ECU 40 when the occupant 42 (FIG. 2) seated on the vehicle seat 12 wears the lap belts 14, 16 and the shoulder belts 18, 20 (during normal wearing). The method will be described.

  As shown in the flowchart of FIG. 3, in step 80, the ECU 40 recognizes the initial positions of the retractors 22, 24, 26, and 28, that is, the initial angular positions of the spools 52, 56, 62, and 68, respectively. In the next step 82, the occupant detection sensor detects the seating of the occupant 42 on the vehicle seat 12. In the next step 84, the shoulder belt meter lamp is lit to indicate to the occupant 42 that the extension length of the seat belts (lap belts 14, 16 and shoulder belts 18, 20) is being adjusted. In step 86, when the occupant 42 inserts the tongue plate 46 into the buckle device 50, the buckle switch detects this, and a buckle fixing signal is transmitted from the buckle device 50 to the ECU 40. Thereby, it is recognized that the lap belts 14 and 16 and the shoulder belts 18 and 20 are completely attached by the occupant 42.

  Next, in step 88, the respective feeding lengths when the respective belts (the lap belts 14 and 16 and the shoulder belts 18 and 20) are attached are recognized. Specifically, in FIG. 1, when the lap belt 14 on the right side of the vehicle is pulled out of the retractor 22, the spool 52 in the retractor 22 rotates. The rotation of the spool 52 is transmitted from a gear 54 provided on the rotation shaft of the spool 52 to a gear 55 provided on the rotation shaft of the retractor motor 32. At this time, the rotation shaft of the retractor motor 32 follows the rotation of the spool 52, and the rotation angle of the rotation shaft of the retractor motor 32 is transmitted to the ECU 40. The ECU 40 calculates the feeding length of the lap belt 14 based on the rotation angle.

  When the lap belt 16 on the left side of the vehicle is pulled out from the retractor 24, the spool 56 in the retractor 24 rotates. The rotation of the spool 56 is transmitted from a gear 58 provided on the rotation shaft of the spool 56 to a gear 60 provided on the rotation shaft of the retractor motor 34. At this time, the rotation shaft of the retractor motor 34 follows the rotation of the spool 56, and the rotation angle of the rotation shaft is transmitted to the ECU 40. The ECU 40 calculates the feeding length of the lap belt 16 based on the rotation angle.

  On the other hand, when the shoulder belt 18 on the left side of the vehicle is pulled out from the retractor 26, the spool 62 in the retractor 26 rotates. The rotation of the spool 62 is transmitted from a gear 64 provided on the rotation shaft of the spool 62 to a gear 66 provided on the rotation shaft of the retractor motor 36. At this time, the rotation shaft of the retractor motor 36 follows the rotation of the spool 62, and the rotation angle of the rotation shaft is transmitted to the ECU 40. The ECU 40 calculates the feeding length of the shoulder belt 18 based on the rotation angle.

  When the shoulder belt 20 on the left side of the vehicle is pulled out from the retractor 28, the spool 68 in the retractor 28 rotates. The rotation of the spool 68 is transmitted from a gear 70 provided on the rotation shaft of the spool 68 to a gear 72 provided on the rotation shaft of the retractor motor 34. At this time, the rotation shaft of the retractor motor 34 follows the rotation of the spool 68, and the rotation angle of the rotation shaft is transmitted to the ECU 40. The ECU 40 calculates the feeding length of the shoulder belt 20 based on the rotation angle. In this way, the respective feeding lengths when the left and right lap belts 14 and 16 and the left and right shoulder belts 18 and 20 are worn are recognized. Further, at this time, the ECU 40 estimates the physique of the occupant 42 based on the feeding lengths of the left and right lap belts 14 and 16 and the left and right shoulder belts 18 and 20, and determines the appropriate length (appropriate feeding length) of each belt length. calculate. The appropriate length of each belt is stored in the ECU 40.

  In order to position the tongue plate 46 and the buckle device 50 at the center in the seat width direction in consideration of the balance when the belt is mounted, it is desirable that the feeding lengths of the left and right lap belts 14 and 16 are equal. Accordingly, the appropriate length of the lap belts 14 and 16 is a constant value corresponding to the physique of the occupant 42. Similarly, considering the balance when the belt is worn, the appropriate lengths of the shoulder belts 18 and 20 are also constant values corresponding to the physique of the occupant 42. The appropriate length of each belt may not be a strictly constant value, but an appropriate value range having a certain width may be set.

  Next, in step 90, it is determined whether the feeding length of each belt is an appropriate value. Specifically, in FIG. 6A, the lap belts 14 and 16 are belts A and B, respectively, and the shoulder belts 18 and 20 are belts C and D, respectively. Here, it is assumed that the feeding length of the belt A is shorter than the appropriate lengths of the belts A and B, and the feeding length of the belt B is longer than the appropriate length. Further, it is assumed that the feeding length of the belt C is shorter than the appropriate length of the belts C and D, and the feeding length of the belt D is longer than the appropriate length.

  In this case, in step 90 of FIG. 3, it is determined that the feeding length of each belt is not an appropriate value, and in step 92, the feeding length of each belt is adjusted by the operation of each retractor motor. In FIG. 1, with respect to the lap belt 14, the spool 52 is rotated in the feeding direction of the lap belt 14 by the operation of the retractor motor 32, and as shown in FIG. ) Is fed out until the belts A and B have an appropriate length. As for the lap belt 16, the spool 56 is rotated in the winding direction of the lap belt 16 by the operation of the retractor motor 34, and the lap belt 16 (belt B) is wound until the belts A and B have an appropriate length. Taken.

  On the other hand, with respect to the shoulder belt 18, the spool 62 rotates in the feeding direction of the shoulder belt 18 by the operation of the retractor motor 36, and the shoulder belt 18 (belt C) becomes the appropriate length of the belts C and D. It is paid out. With respect to the shoulder belt 20, the spool 68 is rotated in the winding direction of the shoulder belt 20 by the operation of the retractor motor 38, and the shoulder belt 20 (belt D) is wound until the belt C and D have an appropriate length. Taken. When the adjustment is completed, in step 94, the seat belt meter lamp is turned off. The passenger 42 can know that the adjustment of the belt feeding length has been completed by turning off the seat belt meter lamp.

  In this way, the feeding lengths of the lap belts 14 and 16 (belts A and B) are equal, and the feeding lengths of the shoulder belts 18 and 20 (belts C and D) are also equal. For this reason, the mounting positions of the lap belts 14 and 16 and the shoulder belts 18 and 20 with respect to the occupant 42 can be optimized according to the physique of the occupant 42.

  In step 90, if the feeding length of each belt is an appropriate value, it is determined that adjustment of the belt length is unnecessary, and in step 94 in FIG. 3, the seat belt meter lamp is turned off.

(Control when belt is pulled out after adjustment is completed)
Once the adjustment of each belt length is completed, any belt may be pulled out again by the operation of the occupant 42 thereafter. Therefore, in the flowchart of FIG. 4, a control method of the ECU 40 when any belt is pulled out after the adjustment of each belt length is completed will be described.

  When it is recognized in step 100 that the feeding length of one of the belts is out of the appropriate value range, in step 102, the seat belt ramp is turned on to indicate to the occupant 42 that the belt feeding length is being adjusted. Lights up again. In step 104, it is detected that the feeding length of each belt is changing by the operation of the occupant 42. In step 106, for example, when the change in the feeding length of each belt decreases or the change in the feeding length of each belt stops, it is determined that the posture of the occupant 42 is stable. In step 108, the retracting length of each belt is adjusted to the last adjustment value (appropriate length of each belt) stored in the ECU 40 by each retractor motor. When this adjustment is completed, in step 110, the seat belt meter lamp is turned off. The passenger 42 can know that the adjustment of the belt feeding length has been completed by turning off the seat belt meter lamp.

(Control when the tongue plate is removed from the buckle device after the belt is mounted and the vehicle does not get off)
When the vehicle is not running, the occupant 42 wearing the seat belts (the lap belts 14 and 16 and the shoulder belts 18 and 20) removes the tongue plate 46 from the buckle device 50 so that the seat belt is not attached. There is a case where the user is seated on the vehicle seat 12 without taking off and getting off. Therefore, the control method of the ECU 40 in such a case will be described with reference to the flowchart of FIG.

  When it is detected by the buckle switch of the buckle device 50 that the tongue plate 46 has detached from the buckle device 50, it is determined in step 120 whether or not the occupant 42 has got off the vehicle based on a signal from the occupant detection sensor. If it is determined that the occupant 42 has exited, the process returns to the flowchart of FIG. 3 (control in normal wearing).

  On the other hand, if it is determined that the occupant 42 has not got off, the seat belt meter lamp is turned on in step 122. When the occupant 42 inserts the tongue plate 46 into the buckle device 50 again, the buckle switch detects this in step 124 and a buckle fixing signal is transmitted from the buckle device 50 to the ECU 40. Thereby, it is recognized that the lap belts 14 and 16 and the shoulder belts 18 and 20 are completely attached by the occupant 42. In step 126, the retracting length of each belt is adjusted to the last adjustment value (the appropriate length of each belt) stored in the ECU 40 by each retractor motor. When this adjustment is completed, in step 128, the seat belt meter lamp is turned off.

  The control method is not limited to these, and the control method may be appropriately changed or added in consideration of various assumed usage conditions.

  As described above, in the occupant restraint device 10 according to the present embodiment, the left and right lap belts 14, 16 and the left and right shoulder belts 18, 20 for restraining the occupant can be pulled out from the retractors 22, 24, 26, 28, respectively. In addition, the mounting positions of the lap belts 14 and 16 and the shoulder belts 18 and 20 with respect to the occupant 42 can be optimized according to the physique of the occupant 42. Further, since the retractors 22, 24, 26, and 28 can be operated independently, it is possible to suppress a sense of incongruity at the time of pulling out each belt, and it is possible to ensure good pulling operability.

  In the above embodiment, the retractor 26 that can wind up the shoulder belt 18 on the right side of the vehicle and the retractor 28 that can wind up the shoulder belt 20 on the left side of the vehicle are both disposed in the seat back 48. However, the retractors 26 and 28 may be provided, for example, in a vehicle body part (an upper back panel or the like) behind the seat back 48 in the vehicle. In addition, the retractor motors 32, 34, 36, and 38 also serve as detection means and drive means. However, apart from the retractor motors 32, 34, 36, and 38, as the detection means, a pickup coil, an optical sensor, an electrostatic sensor A capacitance sensor, a rotary encoder, or the like may be used.

  Further, in the above control method, the ECU 40 estimates the physique of the occupant 42 based on the extended lengths of the left and right lap belts 14 and 16 and the left and right shoulder belts 18 and 20, but does not estimate the physique. A control method may be used.

It is a schematic diagram which shows the vehicle seat which has a passenger | crew restraint apparatus. It is a front view which shows the state which the passenger | crew who seated on the vehicle seat mounted | worn the lap belt and the shoulder belt with appropriate length, respectively. It is a flowchart which shows the control system of ECU at the time of normal mounting | wearing of a lap belt and a shoulder belt. It is a flowchart which shows the control system of ECU when one belt is further pulled out after adjusting the feeding length of each belt at one end. It is a flowchart which shows the control system of ECU when a tongue plate is made to detach | leave from a buckle apparatus after mounting | wearing of a lap belt and a shoulder belt. (A) It is a diagram which shows an example of the feeding length of each belt in the stage before adjustment of feeding length after mounting of each belt. (B) It is a diagram showing a state in which the feeding length of each belt is adjusted by the ECU, and the feeding lengths of the left and right lap belts and the feeding lengths of the left and right shoulder belts are equal to each other.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Crew restraint device 12 Vehicle seat 14 Lap belt 16 Lap belt 18 Shoulder belt 20 Shoulder belt 22 Retractor 24 Retractor 26 Retractor 28 Retractor 32 Retractor motor (detection means, drive means)
34 Retractor motor (detection means, drive means)
36 Retractor motor (detection means, drive means)
38 Retractor motor (detection means, drive means)
42 Crew 42C Chest 42W Lumbar

Claims (3)

A pair of left and right lap belts corresponding to the waist of an occupant seated in the vehicle seat;
A pair of left and right shoulder belts respectively connected to the lap belt and corresponding to the chest of the occupant;
The wrap belt and the shoulder belt are disposed at the winding side end portions of the lap belt and the shoulder belt, respectively configured to be capable of winding the lap belt and the shoulder belt, and at least each of the lap belt and the shoulder belt are driven by driving means. A retractor that can be driven in the winding direction;
Detection means capable of respectively detecting the feeding length of the lap belt and the shoulder belt;
Based on the feeding lengths of the lap belt and the shoulder belt detected by the detecting means, the difference between the feeding lengths of the left and right lap belts and the feeding length of the left and right shoulder belts are reduced. Control means for operating the drive means;
An occupant restraint device.   The control means is configured so that the feeding lengths of the left and right lap belts detected by the detecting means are equal and the feeding lengths of the left and right shoulder belts detected by the detecting means are equal. The passenger | crew restraint apparatus of Claim 1 which operates.   The control means estimates the physique of the occupant based on the feeding lengths of the left and right lap belts and the left and right shoulder belts detected by the detection means, and the feeding length of the lap belts and the feeding of the shoulder belts The occupant restraint device according to claim 1, wherein each of the driving means is operated so that a length becomes an appropriate length corresponding to the physique.

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