JPH11170974A - Occupant protector for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively reduce the impact on an occupant while appropriately holding the occupant by a seat belt when a vehicle is collided. SOLUTION: An occupant protector for vehicles provided with a seat belt 1 to hold an occupant and a load limiter 2 to absorb the collision energy while permitting the seat belt 1 to be pulled out when the pulling-out force above the prescribed value is applied to the seat belt 1 in the collision of a vehicle, is provided with a regulating means to regulate the regulation value of the load limiter 2 according to the vehicle condition or the occupant condition to be detected by a vehicle condition detecting means comprising a vehicle speed sensor 3, an angle sensor 5, a position sensor 7, etc., or an occupant condition detecting means comprising a weight sensor 10, etc., to detect the weight of the occupant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat belt for holding an occupant, and to reduce collision energy while permitting the seat belt to be pulled out when a pull-out force exceeding a regulated value acts on the seat belt during a vehicle collision. The present invention relates to a vehicle occupant protection device including a load limiter configured to absorb a vehicle.

[0002]

2. Description of the Related Art Conventionally, in a vehicle equipped with a seat belt for restraining and protecting an occupant seated in a seat, during a collision, the load on the occupant is prevented from being concentrated by the seat belt, and the occupant is properly adjusted by the seat belt. There is known a seat belt load limiter in which when a pull-out force exceeding a certain value acts on the seat belt, the seat belt is pulled out by a predetermined length.

The load limiter generally has a deformable member around which a webbing of a seat belt is wound, a clamp for holding the webbing, and a lock lever for driving the clamp to hold the webbing. Then, at the time of a vehicle collision, the clamp lever is rotated and displaced in accordance with a command signal output from the control unit to drive the clamp to the webbing sandwiching position, thereby restricting the seat belt from being pulled out. It is configured to protect occupants.

That is, when the occupant's body is urged forward in accordance with the inertial force acting upon a vehicle collision, the seat belt is loaded when a pulling force exceeding the clamping force by the clamp acts on the seat belt. While being pulled out from the limiter, the collision energy is absorbed by frictional resistance acting between the clamp and the seat belt at that time. When the seat belt is pulled out from the load limiter by a predetermined length, the restricting member is plastically deformed, and at that time, the collision energy is absorbed and the impact acting on the occupant is reduced.

[0005]

As described above, the seat belt is always restricted from being pulled out with a constant force irrespective of the running state of the vehicle and the occupant's sitting state at the time of a collision. In the conventional device, when the regulating force is set to a small value, the seat belt is easily pulled out of the load limiter at the time of a vehicle collision, and the regulating member is plastically deformed. There is a problem that the frictional resistance acting between the seat belts becomes small and the effect of absorbing the impact energy by the frictional resistance cannot be sufficiently obtained. vice versa,
If the restricting force is set to a large value, the amount of pulling out of the seat belt pulled out from the load limiter at the time of a vehicle collision is excessively limited, and the effect of absorbing the shock due to the plastic deformation of the restricting member is insufficient. There was a problem of becoming.

In view of such circumstances, the present invention provides a vehicle occupant protection device capable of effectively reducing the impact acting on the occupant while properly holding the occupant by a seat belt in the event of a vehicle collision. Is what you do.

[0007]

The invention according to claim 1 is
A seatbelt for holding an occupant, and a load limiter configured to absorb the collision energy while allowing the seatbelt to be pulled out when a pullout force greater than the regulation value acts on the seatbelt during a vehicle collision. A vehicle occupant protection device comprising: a vehicle state detecting means for detecting a vehicle state; and an adjusting means for adjusting a regulation value of the load limiter according to the vehicle state detected by the vehicle state detecting means. It is.

[0008] According to the above configuration, in the event of a vehicle collision or the like, the regulation value of the load limiter is adjusted so that the occupant's posture is properly maintained by the seat belt in accordance with the vehicle state detected by the vehicle state detection means. Is adjusted, and the impact received by the occupant is effectively reduced by the load limiter, while the occupant's posture is properly maintained by the seat belt.

According to a second aspect of the present invention, the vehicle state detecting means detects a vehicle speed.
In the vehicle occupant protection device described above, the regulation value of the load limiter is adjusted to increase as the vehicle speed detected by the vehicle state detection means increases.

According to the above construction, when it is confirmed that the vehicle is in the traveling state at a high vehicle speed in response to the detection signal of the vehicle state detecting means, the road load is higher than when the vehicle is in the traveling state at a low vehicle speed. Since the limiter regulation value is adjusted to be large, the body of the occupant who moves to the front side of the vehicle body according to the large inertial force that acts when a vehicle collision occurs in a high vehicle speed running state Is properly held by the seat belt, and the impact received by the occupant is effectively reduced by the load limiter.

According to a third aspect of the present invention, in the vehicle occupant protection device according to the first or second aspect, the upright angle of the seat back is detected by the vehicle state detecting means. The regulation value of the load limiter is adjusted so as to increase as the upright angle of the seat back detected by the means increases.

According to the above configuration, when the rising angle of the seat back is confirmed to be large according to the detection signal of the vehicle state detecting means, the regulation value of the load limiter is smaller than when the rising angle is small. Is adjusted to be larger, so that even if a vehicle collision accident occurs in a state where the occupant is seated on the seat so that the head of the occupant is located on the front side of the vehicle body, the head of the occupant further increases Moving forward is effectively suppressed by the seat belt.

According to a fourth aspect of the present invention, in the vehicle occupant protection apparatus according to any one of the first to third aspects, the sliding position of the seat bottom is detected by the vehicle state detecting means. The regulation value of the load limiter is adjusted to increase as the sliding position of the seat bottom detected by the vehicle state detecting means is positioned on the front side of the vehicle body.

According to the above construction, if it is confirmed that the sliding position of the seat bottom is located on the front side of the vehicle body in accordance with the detection signal of the vehicle state detecting means, the sliding position is determined to be rearward of the vehicle body. The regulation value of the load limiter is adjusted to be larger than when the vehicle is located on the side of the vehicle, so a vehicle collision accident occurs when the occupant is seated on the seat bottom located on the front side of the vehicle body Even if it does, the occupant will be further effectively prevented from moving forward of the vehicle body by the seat belt.

According to a fifth aspect of the present invention, there is provided a vehicle occupant protection device including a seat belt for holding an occupant and a load limiter for restricting the seat belt from being pulled out. The vehicle includes a detecting means and an adjusting means for adjusting the regulation value of the load limiter according to the state of the occupant detected by the occupant state detecting means.

According to the above construction, the load limiter is regulated so that the occupant's posture is properly held by the seat belt according to the occupant's state detected by the occupant's state detecting means at the time of a vehicle collision or the like. The value is adjusted, and the impact received by the occupant is effectively reduced by the load limiter while the occupant's posture is properly maintained by the seat belt.

The invention according to claim 6 is the vehicle occupant protection device according to claim 5, wherein the weight of the occupant seated on the seat is detected by the occupant state detection means. In this case, the regulation value of the load limiter is adjusted so as to increase as the weight of the occupant detected by the vehicle increases.

According to the above configuration, when it is confirmed that the weight of the occupant is heavy according to the detection signal of the occupant state detecting means, the regulation value of the load limiter becomes larger than when the weight is light. As a result, the seatbelt effectively prevents the occupant's body from moving forward due to a large inertial force acting according to the weight of the occupant during a vehicle collision or the like. .

According to a seventh aspect of the present invention, there is provided a vehicle occupant protection device including a seat belt for holding an occupant and a load limiter for restricting the seat belt from being pulled out. There is provided a head position detecting means for detecting a position, and an adjusting means for adjusting the regulation value of the load limiter according to the occupant's head position detected by the head position detecting means.

According to the above configuration, if it is confirmed that the head position of the occupant is located, for example, in front of the vehicle body in accordance with the detection signal of the seating position detection means, the head position is determined. The regulation value of the load limiter is adjusted to be larger than when the vehicle is located on the rear side, whereby the head of the occupant moves further forward in accordance with the inertia force acting upon a vehicle collision or the like. Is effectively suppressed.

[0021]

FIG. 1 shows an embodiment of a vehicle occupant protection system according to the present invention. The vehicle occupant protection device includes a seat belt 1 for holding an occupant, and a load limiter 2 for restricting the seat belt 1 from being pulled out.
A vehicle speed sensor 3 for detecting a vehicle speed V;
Sensor 5 for detecting the standing angle of the vehicle, a position sensor 7 provided on the seat slider 6, and a weight sensor 10 for detecting the weight of the occupant seated on the seat bottom 9 of the seat 8.
And a control unit 11 that outputs a control signal corresponding to a detection signal of each sensor to the load limiter 2.

As shown in FIG. 2, the load limiter 2 includes a regulating member 12 around which the seat belt 1 is wound,
A pair of clamps 13, 14 installed opposite to each other so as to sandwich the seat belt 1, a lock lever 15 for pushing one clamp 13 toward the other clamp 14, and a rocking displacement of the lock lever 15 Actuator 1
6, a stopper 17 for limiting the swing range of the lock lever 15, and a pair of clamps 21 and 22 disposed below the clamps 13 and 14 to face each other.

When the vehicle collides, the actuator 16 is actuated according to the control signal output from the control unit 11 to swing the lock lever 15 from the lower standby position to the upper pushing position. As shown in FIG. 3, the clamp 13 is pushed toward the clamp 14 so that the seat belt 1 is held between the clamps 13 and 14. Further, when the seat belt 1 is pulled out from the load limiter 2 in accordance with the pulling power input to the seat belt 1 from the occupant's body at the time of collision,
Accordingly, the clamps 13 and 14 move up along the casing of the load limiter 2, and when the clamps 13 and 14 come into contact with the stopper 17, the clamps 13 and 14 are prevented from rising.

The stopper 17 is supported slidably in the vertical direction along the casing of the load limiter 2 and is controlled by adjusting means 20 comprising a screw shaft 18 and a servomotor 19 for driving the screw shaft 18 to rotate. It is configured to be screw-fed. Then, the adjusting means 20 is operated in response to the control signal output from the control unit 11 and the stopper 17 is screw-fed, so that the rising prevention positions of the clamps 13 and 14 are set to 5
It changes in stages.

The swing range of the lock lever 15 engaged with the clamp 13 changes in accordance with the change in the position where the stopper 17 prevents the clamps 13 and 14 from rising. The clamping force is adjusted by 13 and 14. That is, the clamps 13, 1
4 moves upward, the lock lever 15 swings and displaces so as to approach a horizontal state, and the pressing force against the clamp 13 rises. The clamping force increases, and the regulation value of the load limiter 2 that regulates the pulling out of the seat belt 1 increases.

When a pulling force greater than the clamping force of the clamps 13 and 14, that is, a pulling force greater than a regulation value adjusted according to the position of the stopper 17 acts on the seat belt 1,
When the restricting member 12 is compressed and plastically deformed, the seat belt 1 is pulled out of the load limiter 2 by an amount corresponding to the diameter change of the restricting member 12, and the collision also occurs when the restricting member 12 is plastically deformed. Energy is being absorbed.

The clamps 21, 22 disposed below the clamps 13, 14 are used to prevent the seat belt 1 from being pulled out from the load limiter 2, for example, when the vehicle rolls over. , Which is driven by an actuator (not shown) that operates in response to a control signal from the control unit 11 and holds the seatbelt 1 so that the seatbelt 1 is not pulled out and the load limiter 2 is brought into an operation stop state. Is configured.

The vehicle speed sensor 3 detects a vehicle speed V corresponding to a rotation speed of an output shaft of a transmission mounted on the vehicle.
Consisting of a magnetoresistive element (MRE) sensor for detecting
The angle sensor 5 includes a potentiometer or the like that detects an upright angle θ of the seat back 4 supported by the reclining mechanism 20 so as to be tiltable with respect to a horizontal plane, and is configured to output a detection signal to the control unit 11. .

The position sensor 7 comprises a potentiometer or the like for detecting the position of the seat bottom 9 which is displaced in the longitudinal direction of the vehicle along the seat slider 6, and has a distance D from the current position of the seat bottom 9 to the rearmost position. Is configured to be detected. Further, the weight sensor 1
Numeral 0 is constituted by a pressure sensor or the like installed in the seat bottom 9 and configured to detect the weight of the occupant seated on the seat 8 and output this detection signal to the control unit 11.

The control unit 11 controls the vehicle speed sensor 3,
A control signal for adjusting the regulation value of the load limiter 2 is output to the adjusting means 20 according to the vehicle state detected by the angle sensor 5 and the position sensor 7 and the occupant state detected by the weight sensor 10. It is configured as follows. For example, as the vehicle speed V detected by the vehicle speed sensor 3 increases, a control signal for moving the installation position of the stopper 17 upward is output, so that the regulation value of the load limiter 2 that regulates pulling out of the seat belt 1 increases. It is adjusted to the value.

The regulation value of the load limiter 2 is as follows:
The larger the upright angle θ of the seat bag 4 detected by the angle sensor 5 is, the larger the value is adjusted. Further, as the slider position of the seat bottom 9 detected by the position sensor 7 is located on the front side of the vehicle body, that is, as the distance D from the current position of the seat slider 6 to the rearmost position increases, the seat belt 1 The control signal for moving the installation position of the stopper 17 upward as the regulation value of the load limiter 2 that regulates the pulling out of the vehicle is adjusted to a large value and the weight of the occupant detected by the weight sensor 10 increases. The regulation value of the load limiter 2 is adjusted to a large value by the output from the unit 11 to the adjusting means 17.

The control operation executed in the control unit 11 will be described with reference to the flowchart shown in FIG. When this control operation starts, in step S1, the detected value of the vehicle speed V detected by the vehicle speed sensor 3 is input, and in step S2, the detection of the standing angle θ of the seat back 4 detected by the angle sensor 5 is performed. Enter a value. In step S3, a detection value of the distance D from the current position of the sheet slider 6 to the rearmost position detected by the position sensor 7 is input.

Next, in step S4, after the detected value of the weight W detected by the weight sensor 10 is input, in step S5, the regulation value of the load limiter 2 is set based on the detected values. A determination value R is calculated. That is, a value θ · ka obtained by multiplying the detected value of the vehicle speed V by a predetermined coefficient ka, a value V · kb obtained by multiplying the detected value of the standing angle θ by a predetermined coefficient kb,
By adding a value D · kc obtained by multiplying the detected value of the distance D by a predetermined coefficient kc, the discrimination value R (= V
· Ka + θ · kb + D · kc).

Then, in step S6, it is determined whether or not the discrimination value R for setting the regulation value is smaller than a first reference value R1 set in advance. In step S7, a control signal for setting the restriction value of the load limiter 2 for restricting pulling out of the seat belt 1 to the first level which is the minimum value is output to the adjusting means 17.

If the determination in step S6 is NO, the flow proceeds to step S8 in which the load limiter 2
It is determined whether or not the determination value R for setting the regulation value is smaller than the second reference value R2 set to a value larger than the first reference value R1, and if YES is determined, In step S9, a control signal for setting the regulation value of the load limiter 2 to a second level that is larger than the first level by a predetermined amount is output to the adjusting unit 17.

On the other hand, if NO is determined in step S8, the determination value R is determined in step S10.
Is determined to be less than a third reference value R3 set to a value greater than the second reference value R2, and if YES is determined, in step S11, the seat belt 1 is pulled out. A control signal for setting the regulated value of the load limiter 2 to be regulated to a third level larger by a predetermined amount than the second level is output to the adjusting means 17.

On the other hand, if NO is determined in step S10, the determination value R is determined in step S12.
Is determined to be less than a fourth reference value R4 set to a value greater than the third reference value R3, and if YES is determined, the restriction of the load limiter 2 is determined in step S13. A control signal for setting the value to a fourth level larger than the third level by a predetermined amount is sent to the adjusting means 17.
Output to If the determination in step S12 is NO and it is confirmed that the determination value R is greater than the fourth reference value R4, then in step S14,
A control signal for setting the regulation value of the load limiter 2 to a fifth level higher than the fourth level is output to the adjusting means 17.

The seat belt 1 holding the occupant in this manner
A load limiter 2 that absorbs collision energy while allowing the seat belt 1 to be pulled out when a pull-out force greater than or equal to a regulation value acts on the seat belt 1 during a vehicle collision.
In the vehicle occupant protection device provided with: a vehicle state detecting means including the vehicle speed sensor 3, the seat back sensor 5, the position sensor 7 and the like for detecting the vehicle state; and a vehicle state detected by the vehicle state detecting means. The regulation means 17 for adjusting the regulation value of the load limiter 2 according to the vehicle condition is provided, so that the seat belt 1 properly holds the occupant's posture by adjusting the regulation value of the load limiter 2 according to the vehicle condition. In addition, the impact energy acting on the occupant from the seat belt 1 at the time of the collision can be effectively absorbed by the load limiter 2.

For example, if the regulation value of the load limiter 2 is adjusted to be larger as the value of the vehicle speed V detected by the vehicle speed sensor 3 is larger, a large inertia force is generated because the vehicle is running at a high vehicle speed. As a result, the body of the occupant who moves to the front side of the vehicle body can be firmly held by the seat belt 1 to stabilize its posture, and the seat belt 1 is excessively pulled out from the load limiter 2. Thus, the occurrence of a so-called bottoming phenomenon in which the regulating member 12 is maximally compressed and deformed can be effectively suppressed.

In addition, the regulation value of the load limiter 2 is adjusted to a value corresponding to the vehicle speed V detected by the vehicle speed sensor 3 as described above, so that the frictional resistance corresponding to the impact load applied at the time of collision is reduced. Since the collision energy is provided between the seat belt 1 and the load limiter 2, the collision energy is effectively absorbed by the collision and the collision energy is given to the occupant from the seat belt 1 when a collision accident occurs at a high vehicle speed. Shock can be reduced.

When the regulation value of the load limiter 2 is adjusted to be larger as the upright angle θ of the seat back 4 detected by the angle sensor 5 is larger,
When the head A of the occupant is considered to be located on the front side of the vehicle body by sitting on the seat 8 with the upper body standing up, the head A of the occupant tries to move further to the front side of the vehicle body. This can be effectively suppressed by the seat belt 1, so that the occupant can be properly protected.

Further, in accordance with the sliding position of the seat slider 6 detected by the position sensor 7, when the regulation value of the load limiter 2 is adjusted to be larger as the seat slider 6 is located more forward, In the state in which the occupant seated on the seat 8 is considered to be located on the front side of the vehicle body corresponding to the position of the seat slider 6, the occupant attempts to further move to the front side of the vehicle body. Since the seat belt 1 can be effectively regulated, the occupant can be properly protected.

The regulation value of the load limiter 2 which regulates the pulling out of the seat belt 1 in accordance with the occupant state detected by the occupant state detecting means comprising the weight sensor 10 for detecting the occupant's weight W as described above. Therefore, while the occupant is properly held by the seat belt 1, the impact received by the occupant at the time of a collision can be effectively reduced by the load limiter 2.

That is, when the weight W of the occupant is heavy, a large inertial force acts on the occupant at the time of a vehicle collision as compared with the case where the weight W is light, so the weight W detected by the weight sensor 10 is heavy. By adjusting the load limiter 2 so as to increase the regulation value, the seat belt 1 effectively suppresses the movement of the occupant's body to the front side of the vehicle body in accordance with the inertia force, thereby reducing the occupant. In addition to providing appropriate protection, the load limiter 2 can effectively absorb the impact energy at the time of the collision and reduce the impact received by the occupant.

In the above embodiment, the load limiter 2 is controlled in accordance with the vehicle state detected by the vehicle state detecting means including the vehicle speed sensor 3 and the occupant state detected by the occupant state detecting means including the weight sensor 10.
Is regulated, but the regulation value of the load limiter 2 may be regulated based on either the vehicle state or the occupant state. Further, the regulation value of the load limiter 2 is not limited to the above five steps, but can be adjusted to an arbitrary step. Further, the load limiter 2 can be adjusted based on the determination value R for setting the regulation value of the load limiter 2. May be configured to linearly adjust the regulation value.

As shown in FIG. 1, the distance Da between the head A of the occupant seated on the seat 8 and a vehicle body-side member such as a steering wheel B or an instrument panel located in front of the head A is determined. Head position detecting means 23 comprising an infrared distance sensor or a CCD sensor for detecting
The more the occupant's head position detected by the head position detecting means 23 is located on the front side of the vehicle body, that is, the occupant's head A and the steering wheel B located on the front side thereof Control may be performed such that the regulation value of the load limiter 2 is adjusted to a larger value as the distance Da between the vehicle body side member and the vehicle body member is smaller.

When the regulation value of the load limiter 2 is adjusted in accordance with the occupant's head position directly detected by the head position detecting means 23 as described above, it acts upon a collision. The holding force of the occupant by the seat belt 1 can be accurately adjusted so that the occupant's head A does not come into contact with the vehicle body side member due to the impact load. It should be noted that when executing the regulation control of the regulation value corresponding to the detection value of the head position detection means 23, the regulation control of the regulation value corresponding to the detection value of the occupant state detection means including the weight sensor 10 and the like is also performed. Are desirably performed at the same time.

Adjusting means 2 for adjusting the regulation value of the load limiter 2 for regulating the seat belt 1 from being pulled out.
The specific configuration of 0 is not limited to the above embodiment, and various modifications are possible. For example, a plurality of stoppers 17 in which restriction positions for restricting the swing range of the lock lever 15 are set at various positions are arranged in a direction orthogonal to the paper surface of FIG. Are selectively engaged with the clamps 13 and 14 to change the swing limit position of the lock lever 15 and adjust the regulation value of the load limiter 2 that regulates pulling out of the seat belt 1. May be.

Further, a plurality of clamps 13 and 14 divided in a direction perpendicular to the plane of FIG.
A plurality of stoppers 17 for individually driving each clamp 13
And the regulation value of the load limiter 2 is adjusted by changing the number of the clamps 13 and 14 for clamping the seat belt 1 in accordance with the detection signals of the vehicle state detecting means and the occupant state detecting means. You may.

Further, as shown in FIG.
An adjusting means 27 comprising a screw portion 24 provided on the side wall portion of the screw member, a screw shaft 25 screwed to the screw portion 24, and a servomotor 26 for rotating the screw shaft 25 is provided. In response to the control signal output from the controller, the servomotor 26 is operated to rotate the screw shaft 25, thereby feeding the clamp 13 with the screw and loading the load limiter 2 comprising the clamping pressure of the seat belt 1 by the clamps 13 and 14. May be directly adjusted.

[0051]

As described above, the present invention allows the seat belt to hold the occupant and allows the seat belt to be pulled out when the seat belt is subjected to a pull-out force exceeding the regulation value during a vehicle collision. A vehicle limiter configured to absorb a collision energy while absorbing a collision energy, the vehicle occupant protection device including: a vehicle state detection unit that detects a vehicle state; and a vehicle state detection unit that detects a vehicle state detected by the vehicle state detection unit. Adjustment means for adjusting the regulation value of the load limiter is provided.By adjusting the regulation value of the load limiter according to the vehicle state, the seat belt properly holds the occupant's posture, The impact energy received by the occupant can be reduced by effectively absorbing the collision energy.

Further, according to the present invention, there are provided occupant state detecting means for detecting the state of the occupant, and adjusting means for adjusting the regulation value of the load limiter according to the occupant state detected by the occupant state detecting means. Therefore, by adjusting the regulation value of the load limiter in accordance with the state of the occupant detected by the occupant state detection means, while maintaining the occupant's posture properly by the seat belt, the impact energy is effectively reduced by the load limiter. Can be absorbed.

The present invention also provides a head position detecting means for detecting a head position of an occupant seated on a seat, and the load limiter according to the occupant head position detected by the head position detecting means. Since the adjusting means for adjusting the regulation value is provided, the seat according to the detection value of the head position detecting means is used so that the head of the occupant does not abut against the vehicle body side member due to the impact load acting upon the collision. The occupant holding force by the belt can be accurately adjusted, and the load limiter can effectively absorb the collision energy and reduce the impact on the occupant.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a vehicle occupant protection device according to the present invention.

FIG. 2 is an explanatory diagram showing a specific configuration of a load limiter.

FIG. 3 is an explanatory diagram showing an operation state of a load limiter.

FIG. 4 is a flowchart showing a control operation by a control unit provided in the vehicle occupant protection device.

FIG. 5 is an explanatory diagram showing another example of the load limiter.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 seat belt 2 load limiter 3 vehicle speed sensor (vehicle state detecting means) 4 seat back 5 angle sensor (vehicle state detecting means) 7 position sensor (vehicle state detecting means) 8 seat 9 seat bottom 10 weight sensor (occupant state detecting means) 20, 27 adjusting means 23 head position detecting means

Claims (7)

[Claims] A seat belt for holding an occupant, and a structure in which collision energy is absorbed while permitting the seat belt to be pulled out when a pull-out force exceeding a regulated value acts on the seat belt during a vehicle collision. A vehicle state detecting means for detecting a vehicle state, and an adjusting means for adjusting a regulation value of the load limiter in accordance with the vehicle state detected by the vehicle state detecting means. And a vehicle occupant protection device. 2. The vehicle occupant protection system according to claim 1, wherein the vehicle speed is detected by the vehicle state detecting means. The load limiter is regulated as the vehicle speed detected by the vehicle state detecting means increases. An occupant protection device for a vehicle, wherein the occupant protection device is adjusted to increase the value. 3. The vehicle occupant protection device according to claim 1, wherein said vehicle state detecting means detects an upright angle of a seat back. 3. The seat detected by said vehicle state detecting means. An occupant protection device for a vehicle, wherein the regulation value of the load limiter is adjusted to increase as the standing angle of the back increases. 4. The occupant protection system for a vehicle according to claim 1, wherein the sliding position of the seat bottom is detected by the vehicle state detecting means. An occupant protection system for a vehicle, wherein the regulation value of the load limiter is adjusted to be larger as the detected sliding position of the seat bottom is located on the front side of the vehicle body. 5. A seat belt for holding an occupant, and absorbing collision energy while allowing the seat belt to be pulled out when a pull-out force exceeding a regulated value acts on the seat belt during a vehicle collision. A vehicle occupant protection device provided with a load limiter that adjusts a regulation value of the load limiter according to the occupant status detected by the occupant status detection device. An occupant protection device for a vehicle, comprising an adjusting means. 6. The vehicle occupant protection device according to claim 5, wherein the weight of the occupant seated on the seat is detected by the occupant state detection means. An occupant protection device for a vehicle, wherein the regulation value of the load limiter is adjusted to increase as the weight increases. 7. A seat belt for holding an occupant, and absorbing collision energy while permitting the seat belt to be pulled out when a pull-out force exceeding a regulation value acts on the seat belt during a vehicle collision. A head position detecting means for detecting a head position of an occupant seated on the seat, and a head position of the occupant detected by the head position detecting means. And an adjusting means for adjusting the regulation value of the load limiter.