JP4902388B2 - Vehicle occupant restraint system - Google Patents

Description

  The present invention relates to an occupant restraint device for a vehicle such as a seat belt device and a side support.

  As a vehicle seat belt device, a motor for rotationally driving the belt reel is provided, and the webbing tension is controlled by driving the motor in an emergency or when the running state is unstable to stabilize the occupant posture. Has been put into practical use (for example, see Patent Document 1).

In the seat belt device described in Patent Document 1, a belt reel on which a webbing is wound is connected to a motor, and control of webbing tension by the motor is started in accordance with the longitudinal and lateral deceleration acting on the vehicle. It is like that. Specifically, the seat belt device includes a longitudinal acceleration sensor and a lateral acceleration sensor, and threshold setting means for setting a threshold corresponding to the direction of the deceleration vector acting on the vehicle with reference to a map. The detected value detected by the two acceleration sensors is compared with the threshold value set by the threshold setting means, and the motor is driven to increase the webbing tension when the detected value exceeds the threshold value.
JP 2003-237534 A

  However, in this conventional seat belt device, a threshold value corresponding to the direction of deceleration acting on the vehicle is sequentially obtained, and the webbing tension is controlled by comparing the threshold value with the detection values of both acceleration sensors. However, there is a concern that the calculation burden on the controller will increase.

  Accordingly, the present invention is intended to provide an occupant restraint device for a vehicle that can obtain an appropriate occupant restraint corresponding to the deceleration acting on the vehicle without increasing the calculation burden of the controller.

The invention according to claim 1, which solves the above problem, is an occupant restraint that restrains an occupant at two points on the upper and lower sides of the vehicle compartment side wall and one point below the seat near the inside of the vehicle body by webbing drawn from the belt reel. A device that retracts the webbing by occupant restraint means (for example, a motor 10 and a belt reel 12 in an embodiment described later) according to a deceleration acting on the vehicle, and detects a deceleration acting on the vehicle. When it is assumed that the speed detection means (for example, the longitudinal acceleration sensor 19 and the lateral acceleration sensor 20 in the embodiment described later) and the deceleration acting on the vehicle act on the origin of the orthogonal coordinates, the deceleration is expressed on the coordinates. determining the deceleration direction category determination means for determining which faces the region of the four divided regions cut every 90 ° in all directions around the origin (e.g. An operation condition is defined for each of the demarcation direction division determining means 24) and the coordinate area on the coordinates, and the operation condition of the demarcation area determined by the deceleration direction division determination means and the deceleration detection are described below. An operation determination means (for example, an operation determination means 25 in an embodiment described later) that compares the detection result of the means and determines whether or not the detection result satisfies the operation condition of the corresponding segment area, A region in front of the vehicle and in the vehicle width direction among the divided regions determined by the deceleration direction division determining unit that operates the occupant restraint unit when it is determined that the operation determining unit satisfies the operating condition. Then, the operation condition used by the operation determination means is set lower than the area in front of the vehicle and outside in the vehicle width direction .
As a result, when deceleration in any direction acts on the vehicle and the deceleration detection means detects the deceleration, first, the deceleration direction classification determination means determines which classification area the deceleration direction is suitable for. judge. After that, the operation determination means compares the operation condition corresponding to the segmented area where the deceleration is suitable and the detection result of the deceleration detection means, and if the detection result satisfies the operation condition, the occupant restraint means is operated and satisfied. Otherwise, the occupant restraint means is not operated.

According to a second aspect of the present invention, in the vehicle occupant restraint device according to the first aspect of the present invention, in a region rearward of the vehicle and in the vehicle width direction, out of the divided regions determined by the deceleration direction division determining means, Whether the absolute value of the lateral component of deceleration acting on the vehicle exceeds a threshold or not is determined as an operating condition, and the vehicle is located behind the vehicle and outside in the vehicle width direction in the segmented region determined by the deceleration direction determining unit. In the region, the operation condition is set so as not to always operate.

According to a third aspect of the present invention, in the vehicle occupant restraint device according to the first or second aspect, the operating condition for each of the divided areas is set individually for each seat of the vehicle. .
Accordingly, it is possible to appropriately cope with a case where the relationship between the direction of deceleration and the degree of necessity of occupant restraint is different for each seat .
The holding control is performed at any one of the taking positions.

According to a fourth aspect of the present invention, in the vehicle occupant restraint device according to any one of the first to third aspects, the occupant restraint means is a reversible occupant restraint means that can be operated repeatedly. Features.
Thereby, the passenger | crew restraint according to the direction of deceleration comes to be utilized repeatedly.

According to a fifth aspect of the present invention, in the vehicle occupant restraint device according to any one of the first to fourth aspects, a plurality of operating conditions defined for each of the divided areas on the coordinates are set, and the occupant The restraining means has a plurality of operating modes corresponding to the operating conditions of each stage.
As a result, the occupant restraint means operates in different modes depending on the direction and magnitude of the deceleration acting on the vehicle.

According to a sixth aspect of the present invention, in the vehicle occupant restraint device according to any one of the first to fifth aspects, the restraining means winds a webbing (for example, a webbing 5 in an embodiment described later). A belt reel (for example, a belt reel 12 in an embodiment described later), a motor (for example, a motor 10 in an embodiment described later) for transmitting a driving force to the belt reel and winding the webbing, and the belt reel Winding position detecting means for detecting the winding position (for example, rotation sensor 14 and winding position detecting section 27 in the embodiment described later), and motor control means for controlling the amount of current supplied to the motor (for example, described later). Motor control means 26) in the embodiment, and the motor control means is configured to make the beltley based on the detection result of the winding position detection means. Characterized in that it has a holding control mode to hold the target take-up position.
As a result, when it is determined that the detected deceleration satisfies the operating condition of the corresponding segmented area, the motor control means controls the energization amount of the motor so that the belt reel is held at the target winding position. Become.

According to a seventh aspect of the present invention, in the vehicle occupant restraint device according to the sixth aspect of the present invention, the target winding position is set in a plurality of stages, and a plurality of operating conditions are defined for each segmented area on the coordinates. When the stage is set and each of the operating conditions is satisfied, the motor is controlled to hold the belt reel at the target winding position of the corresponding stage.
As a result, the belt reel winding position is held and controlled at one of a plurality of target winding positions in accordance with the direction and magnitude of the deceleration acting on the vehicle.

According to the first aspect of the present invention, the direction of the deceleration acting on the vehicle is divided into divided areas of 90 ° in front , rear, left, and right on the orthogonal coordinates, and the operating conditions and the detected deceleration corresponding to the divided areas are determined. Since the operation / non-operation of the occupant restraint means is determined by comparison, appropriate occupant restraint according to the deceleration can be performed without using complicated arithmetic processing.
Further, according to the present invention, the operation determination means in the vehicle front and vehicle width direction inner areas of the divided areas determined by the deceleration direction division determination means is more than the vehicle front and vehicle width direction outer areas. Since the operating conditions used in the above are set low, unnecessary restraint due to webbing can be eliminated.

According to the second aspect of the present invention, the absolute value of the lateral component of the deceleration acting on the vehicle in the region rearward of the vehicle and in the vehicle width direction among the segmented regions determined by the deceleration direction segment determining means. Whether or not the value exceeds a threshold value is set as an operating condition, and the operating condition is set so that it does not always operate in the area behind the vehicle and outside in the vehicle width direction among the determined areas determined by the deceleration direction determining means. Therefore, unnecessary restraint due to webbing can be eliminated.

  According to the invention described in claim 3, since the operating conditions for each divided region are individually set for each seat of the vehicle, the occupant restraint means in which the relationship between the direction of deceleration and the degree of occupant restraint is different for each seat. When using, the optimal passenger restraint characteristic can be obtained.

  According to the fourth aspect of the invention, by using the reversible occupant restraint means that can be repeatedly operated, the occupant restraint according to the direction of the deceleration can be repeatedly used. It becomes possible to increase.

  According to the fifth aspect of the present invention, since the occupant restraint means operates in a different manner depending on the direction and magnitude of the deceleration acting on the vehicle, finer occupant restraint according to the vehicle situation becomes possible. .

  According to the sixth aspect of the invention, since the present invention is applied to a seat belt device that holds a webbing at a target winding position by driving a motor, an appropriate webbing according to the deceleration is used without using a complicated calculation process. Crew restraint can be performed.

  According to the seventh aspect of the present invention, the belt reel winding position is held and controlled at one of a plurality of stages of the target winding position according to the direction and magnitude of the deceleration. Depending on the situation, occupant restraint by webbing can be performed more finely.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows an overall schematic configuration of a seat belt device 1 which is an occupant restraint device according to the present invention. In FIG. 1, reference numeral 2 denotes a seat on which an occupant 3 is seated. The seat belt device 1 of this embodiment is a so-called three-point seat belt device, and a webbing 5 is drawn upward from a retractor 4 attached to a center pillar (not shown), and the webbing 5 is supported on the upper side of the center pillar. The tip of the webbing 5 is fixed to the vehicle body floor via an outer anchor 7 near the outside of the passenger compartment of the seat 2. A tongue plate 8 is inserted between the through anchor 6 and the outer anchor 7 of the webbing 5, and the tongue plate 8 can be attached to and detached from the buckle 9 fixed to the vehicle body floor of the seat 2 on the inner side of the vehicle body. It has become.

  The webbing 5 is wound around the retractor 4 in the initial state, and the occupant 3 pulls it out by hand to fix the tongue plate 8 to the buckle 9, thereby restraining the chest and abdomen mainly of the occupant 3 with respect to the seat 2. To do. In the case of the seat belt device 1, the webbing 5 is retracted by an electric motor 10 and explosive ignition at the time of collision or rollover, and the motor 10 constitutes a pretensioner mechanism.

  As shown in FIG. 2, the retractor 4 has a webbing 5 wound around a belt reel 12 rotatably supported by a casing (not shown), and a shaft 12a of the belt reel 12 projects from one end of the casing. Yes. The shaft 12a of the belt reel 12 is connected to the rotary shaft 10a of the motor 10 via a power transmission mechanism 13 including a clutch (not shown) for power connection / disconnection operation. Further, the retractor 4 accommodates a winding spring (not shown) that urges the belt reel 12 in the winding direction. When the belt reel 12 and the motor 10 are separated by an off operation of the clutch, the retractor 4 Tension acts on the webbing 5.

The shaft 12a of the belt reel 12 is provided with a rotation sensor 14 (winding position detecting means) that detects the rotation of the shaft 12a. The rotation sensor 14 includes, for example, a magnetic disk 15 in which different magnetic poles are alternately magnetized along the circumferential direction, and a pair of Hall elements 16a and 16b disposed in proximity to the outer peripheral edge of the magnetic disk 15. And a sensor circuit 17 for processing the detection signals of the Hall elements 16a and 16b, and a pulse signal processed by the sensor circuit 17 is output to the controller 18.
A pulse signal input from the sensor circuit 17 to the controller 18 in accordance with the rotation of the belt reel 12 is basically used as a feedback signal for driving the motor 10 in the controller 18. That is, the controller 18 detects the amount of rotation of the belt reel 12 (the amount by which the webbing 5 is pulled out) by counting the pulse signal, and further calculates the rotation speed (frequency) of the pulse signal to calculate the rotation of the belt reel 12. The speed (drawing speed of the webbing 5) is obtained, and the rotation direction of the belt reel 12 is detected by comparing the rising edges of the waveforms of both pulse signals.

  The controller 18 includes a front object detection device such as a buckle switch and a radar (not shown), a longitudinal acceleration sensor 19 (deceleration detecting means) for detecting a longitudinal deceleration acting on the vehicle, and a lateral direction acting on the vehicle. A lateral acceleration sensor 20 (deceleration detecting means) for detecting the deceleration is connected.

  Further, the controller 18 receives a signal from the longitudinal acceleration sensor 19 and receives a signal from the longitudinal acceleration sensor 20 and a longitudinal acceleration detection unit 22 (deceleration detection means) that calculates a longitudinal deceleration acting on the vehicle. A lateral deceleration detector 23 (deceleration detector) for calculating a lateral deceleration acting on the vehicle, and a deceleration acting on the vehicle in response to signals from the longitudinal deceleration detector 22 and the lateral deceleration detector 23 , And a deceleration direction division determining means 24 for determining which of the divided areas to be described later is directed, and an operating condition and a longitudinal deceleration detector 22 defined for each divided area to be described later. The belt reel 1 receives the signal from the rotation sensor 14 and the operation determination means 25 that determines whether the detection result satisfies the operation condition by comparing the detection result of the lateral deceleration detector 23 and / or the detection result. The winding reel position detector 27 (winding position detector) for calculating the rotational position of the belt 10 and the control target of the belt reel 12 by the motor 10 in response to signals from the winding position detector 27 and the deceleration direction segment determining means 24, respectively. When the target position setting means 28 for setting the position and the operation determination means 25 determine that the operation condition is satisfied, the current control of the motor 10 is performed so that the belt reel 12 becomes the target position set by the target position setting means 28. Motor control means 26 to perform.

Here, the divided area will be described with reference to FIG.
4A and 4B are orthogonal coordinates corresponding to the right and left seats of the vehicle shown in FIG. 3, respectively, and it is assumed that the deceleration of the vehicle acts on the origin position of the orthogonal coordinates. . In FIG. 4, the horizontal coordinate axis is positive in the vehicle right direction, the left direction of the vehicle is negative, and the vertical coordinate axis is positive in the front direction of the vehicle and negative in the rear direction of the vehicle.
In this embodiment, the orthogonal coordinates are divided into four divided regions corresponding to the first quadrant to the fourth quadrant with the origin as the center, and the deceleration direction division determining means 24 as shown in Table 1 below. It is determined to which divided region (quadrant) the vehicle deceleration vector acting on the origin is directed. In the following description, each divided area is distinguished by calling it in a corresponding quadrant.

Moreover, the operation determination means 25 can employ | adopt the thing of the following Table 2 corresponding to FIG. 4 as a detection result and an operation condition, for example. 4 (a) and 4 (b), the hatched areas that exceed the threshold lines are areas that satisfy the operating conditions of the seat belt devices 1 for the right seat and the left seat. When the deceleration vector of the vehicle acting on the coordinate origin position falls within these shaded areas, it is determined that the operation condition for each quadrant (segmented area) is satisfied.
In Table 2, G represents a deceleration acting on the vehicle, Gy represents a lateral (left / right) component of the deceleration G acting on the vehicle, and a, −b, c, a ′, b ′, c 'Indicates the value of a point on each threshold line that intersects the coordinate axes in FIGS. 4 (a) and 4 (b). The “driver's seat condition” means the operating condition of the seat belt device 1 in the right seat, and the “passenger seat condition” means the operating condition of the seat belt device 1 in the left seat.

  The operating conditions in Table 2 will be described. In the first quadrant of the right seat and the second quadrant of the left seat, the absolute value of the deceleration G acting on the vehicle is compared with relatively large threshold values a and a ′. This is because the restraining position of the webbing 5 is sufficiently high in the direction of these quadrants of each seat and is also easily restrained by a door trim or the like. On the other hand, in the second quadrant of the right seat and the first quadrant of the left seat, the absolute value of the deceleration G acting on the vehicle is compared with relatively small thresholds c and c ′. This is because the restraining position by the webbing 5 is low in the quadrant direction, and the shoulder portion of the occupant is difficult to restrain. Also, in the third quadrant of the right seat and the fourth quadrant of the left seat, the comparatively large thresholds −b and b ′ having absolute values are compared with the lateral component Gy of the deceleration G acting on the vehicle. This is because the upper body movement of the occupant to the rear side of the vehicle body can be restrained by the seat back, but the upper body of the occupant may move laterally when the vehicle turns. The reason why no operating condition is provided in the fourth quadrant of the right seat and the third quadrant of the left seat is that the upper body movement of the occupant to the rear side of the vehicle body can be restrained by the seat back, and the This is because body movement is restricted by a door trim or the like.

Hereinafter, the control performed by the seat belt apparatus 1 will be described with reference to the flowchart shown in FIG. The control shown in this flowchart is for the seat belt device 1 for the right seat, but the left seat is performed in substantially the same manner as for the right seat except that the operating conditions are different as shown in Table 2.
First, in step S100, it is determined whether or not the deceleration G is generated in the vehicle while the vehicle is running. If it is determined that the deceleration G is not generated, the process returns and occurs. When it determines, it progresses to step S101.
In step S101, the deceleration division area is determined, and it is determined which of the first to fourth quadrants the direction of the deceleration vector is. At this time, when it is determined that the direction of the deceleration vector is in the first quadrant, the process proceeds to step S102. When it is determined that the direction is in the second quadrant, step S103 is performed. The process returns to step S4 when it is determined that it is suitable for the fourth quadrant.
In steps S102, S103, and S104, it is determined whether or not the detected deceleration satisfies the operating condition (see Table 2) corresponding to each quadrant. If it is determined that the condition is not satisfied, the process returns to determine the condition. When it determines with satisfy | filling, it progresses to step S105 and performs control of the winding position of the belt reel 12 by the action | operation of the motor 10. FIG. The winding position here may be always constant or may be changed according to the running state of the vehicle.

  As described above, in the seat belt device 1, the direction of the deceleration acting on the vehicle is classified according to each quadrant of the orthogonal coordinates, and the operation condition corresponding to each quadrant is compared with the detected deceleration. In order to determine whether or not to change the winding position of the belt reel 12 (the winding amount of the webbing 5), it is possible to perform appropriate occupant restraint according to the deceleration while simplifying the calculation in the controller 18. it can.

  Further, in this seat belt device 1, the operating conditions for each quadrant are set individually for the left and right seats according to the relationship between the direction of deceleration and the degree of necessity of restraint of the occupant. Occupant restraint characteristics can be obtained.

Table 3 below is a discrimination table of a reference example for discriminating a quadrant (segmented region) in which acceleration is directed using detection results of the longitudinal acceleration sensor and the steering angle sensor.

また、表４は、前後加速度センサと舵角センサを用いた場合における右側座席と左側座席の各シートベルト装置の各象限毎の作動条件を示す表であり、同表に示す各条件と前後減速度Ｇ、車速Ｖ、舵角θを比較することによって各象限毎にシートベルト装置の作動を判定することができる。

Table 4 is a table showing the operating conditions for each quadrant of each seat belt device of the right seat and the left seat when the longitudinal acceleration sensor and the rudder angle sensor are used. The operation of the seat belt device can be determined for each quadrant by comparing the speed G, the vehicle speed V, and the steering angle θ.

  Further, in the above example, the longitudinal deceleration of the vehicle is detected by the longitudinal acceleration sensor, but the longitudinal acceleration of the vehicle is estimated based on the change of the vehicle speed or the operation of the accelerator or the brake. You may do it.

  Further, in the above embodiment, one operating condition is provided for each quadrant except for the quadrant in which the seat belt device is not operated at all. However, the operating condition of each quadrant is set to two or more stages, The operation mode of the seat belt device (for example, the winding amount of the belt reel) may be set separately according to the stage.

  FIG. 6 is a flowchart showing the control of the embodiment in which the operating conditions of each quadrant are set in two stages. Hereinafter, the control of this embodiment will be described along the flowchart of FIG. 6, but the operating conditions corresponding to each quadrant are set as shown in Table 5 below. As shown in Table 5, the passenger seat side seat belt device performs almost the same control except that the operating conditions are different from those on the driver seat side. Therefore, only the driver seat side control will be described below. .

In step S200, it is determined whether or not a deceleration G is generated in the vehicle while the vehicle is running. If it is determined that the deceleration G is not generated, the process returns and it is determined that the vehicle is generated. In that case, the process proceeds to step S201.
In step S201, the deceleration division area is determined, and it is determined which of the first to fourth quadrants the direction of the deceleration vector is. At this time, when it is determined that the direction of the deceleration vector is directed to the first quadrant, the process proceeds to step S202. When it is determined that the direction is directed to the second quadrant, the process proceeds to step S203. If it is determined that it is suitable for the fourth quadrant, the process returns.
In step S202, it is determined whether or not the absolute value of the deceleration G is larger than the first-stage threshold value a. If it is determined that the absolute value is larger, the process proceeds to step S205. To do.
Similarly, in step S203, it is determined whether or not the absolute value of the deceleration G is larger than the first-stage threshold value c. If it is determined that the absolute value is larger, the process proceeds to step S206. To return.
Further, in step S204, it is determined whether or not the lateral component Gy of the deceleration G is smaller than the first-stage threshold value −b. If it is determined to be small, the process proceeds to step S207, and is determined not to be small. If it does, return.
In step S205, it is determined whether or not the absolute value of the deceleration G is larger than the second-stage threshold value d corresponding to the first quadrant. In step S206, the absolute value of the deceleration G corresponds to the second quadrant. In step S207, it is determined whether or not the lateral component Gy of the deceleration G is smaller than the second-stage threshold −e corresponding to the third quadrant.
If it is determined in step S205 that the value is greater than the threshold value d, the process proceeds to step S208, and in step S208, belt reel winding control is executed with the second position having a large winding amount as the target position. If it is determined in step S205 that it is not greater than the threshold value d, the process proceeds to step S209, and in step S209, belt reel winding control is performed with the first position having a small winding amount as the target position. Execute.
Similarly, if it is determined in step S206 that the value is larger than the threshold value f, the process advances to step S208 to execute belt reel winding control with the second position as the target position, and is not larger than the threshold value f. If it is determined, the process proceeds to step S209 to execute belt reel winding control with the first position as the target position.
If it is determined in step S207 that the value is smaller than the threshold value -e, the process proceeds to step S208 to execute belt reel winding control with the second position as the target position, and is not greater than the threshold value -e. If it is determined, the process proceeds to step S209 to execute belt reel winding control with the first position as the target position.

  As described above, in this embodiment, since the operation condition in each quadrant can be set to two stages and the winding position of the belt reel can be controlled in multiple stages according to the magnitude of deceleration, Accordingly, occupant restraint by webbing can be performed more finely.

In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary .

1 is an overall schematic configuration diagram of a seat belt device showing an embodiment of the present invention. The schematic block diagram centering on the controller of the seatbelt apparatus of the embodiment. The figure which demonstrated the embodiment and looked at the vehicle interior from the front. FIG. 5 is a diagram illustrating a segmented area of the embodiment, and is a coordinate diagram (a) of a deceleration vector corresponding to the right seat and a coordinate diagram (b) of a deceleration vector corresponding to the left seat. The flowchart which shows the control of the embodiment. The flowchart which shows the control of other embodiment of this invention.

Explanation of symbols

1 ... Seat belt device (occupant restraint device)
5 ... Webbing 10 ... Motor (occupant restraint means)
12. Belt reel (occupant restraint means)
14 ... Rotation sensor (winding position detecting means)
19: Longitudinal acceleration sensor (deceleration detecting means)
20 ... Lateral acceleration sensor (deceleration detecting means)
22: Front / rear deceleration detection unit (deceleration detection means)
23 ... Lateral deceleration detection unit (deceleration detection means)
24 ... Deceleration direction division determination means 25 ... Operation determination means 26 ... Motor control means (occupant restraint means)
27: Winding position detection unit (winding position detection means, occupant restraint means)

Claims (7)

An occupant restraint device that restrains an occupant at two points on the upper and lower sides of the vehicle cabin side wall and one point on the lower side of the seat near the inside of the vehicle body by webbing pulled out from the belt reel , according to the deceleration acting on the vehicle In the webbing retracted by the restraining means ,
Deceleration detection means for detecting deceleration acting on the vehicle;
Assuming that the deceleration acting on the vehicle acts on the origin of the Cartesian coordinates, the deceleration is in any of the four segmented areas divided by 90 ° from front to back and left and right around the origin on the coordinates. Deceleration direction division determining means for determining whether it is facing;
The operating conditions are defined for each segmented area on the coordinates, the operating conditions of the segmented areas determined by the deceleration direction classifying means are compared with the detection results of the deceleration detecting means, and the detection results correspond An operation determination means for determining whether or not the operation condition of the divided area to be satisfied is satisfied,
Activating the occupant restraining means when the operation determining means determines that the operating condition is satisfied ,
Of the segment areas determined by the deceleration direction segment determination means, the operation conditions used by the operation determination means are lower in the area in front of the vehicle and in the vehicle width direction than in the area in front of the vehicle and in the vehicle width direction. An occupant restraint device for a vehicle characterized by being set . Of the segmented areas determined by the deceleration direction classifying means, the area behind the vehicle and inside in the vehicle width direction activates whether or not the absolute value of the lateral component of deceleration acting on the vehicle exceeds a threshold value. As a condition,
  2. The vehicle occupant according to claim 1, wherein an operation condition is set so that the vehicle does not always operate in a region rearward of the vehicle and outside in the vehicle width direction among the segment regions determined by the deceleration direction segment determination unit. Restraint device.   3. The vehicle occupant restraint device according to claim 1, wherein the operation condition for each of the divided areas is individually set for each seat of the vehicle.   The vehicle occupant restraint device according to any one of claims 1 to 3, wherein the occupant restraint means is a reversible occupant restraint means that can be repeatedly operated. The operating conditions defined for each segmented area on the coordinates are set in multiple stages,
The vehicle occupant restraint device according to any one of claims 1 to 4, wherein the occupant restraint means has a plurality of operation modes corresponding to the operation conditions of the respective stages. The restraining means is
A belt reel that winds webbing;
A motor for winding the webbing by transmitting a driving force to the belt reel;
Winding position detection means for detecting the winding position of the belt reel;
Motor control means for controlling the energization amount to the motor,
The said motor control means has a holding | maintenance control mode which hold | maintains the said belt reel in a target winding position based on the detection result of the said winding position detection means. The vehicle occupant restraint device described in 1. The target winding position is set in a plurality of stages,
A plurality of operating conditions defined for each segmented area on the coordinates are set,
The vehicle occupant restraint device according to claim 6, wherein the motor is controlled to hold the belt reel at a target winding position of a corresponding stage when each of the operating conditions is satisfied.

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