DE102018107992A1 - seatbelt device - Google Patents

Abstract

A seatbelt apparatus (1) comprises a control unit (24) which controls at least one of tension adjusting portions for tension adjustment of a shoulder belt portion (10a) and a lap belt portion (10b) of a webbing (10) to seat an occupant (8) in a seat (70 ) so that a tension of the shoulder belt portion and the lap belt portion increases accordingly, as a detected distance between a vehicle (7) and an object (9) becomes smaller.

Description

Background of the invention

Field of the invention

The invention relates to a safety belt device.

Description of the Related Art

There is known a vehicle seatbelt apparatus provided with a first pretensioner disposed at a buckle portion for applying tension to a belt, a second pretensioner disposed at a retractor portion for applying tension to the belt, and a third pretensioner disposed on a pelvic anchor portion for applying tension to the strap (see, eg, US Pat JP 2004/148968 A ).

When there is a high risk of a vehicle accident, the vehicle seat belt device operates by rolling up a shoulder belt by the second belt tensioner and also rolling up a lap belt by the third belt tensioner. Likewise, when the vehicle accident occurs, the vehicle seat belt device operates to activate the first belt tensioner while simultaneously rolling up the shoulder belt and the lap belt.

Summary of the invention

The known vehicle seat belt device can over-constrain a vehicle occupant in a seat even if an accident is avoidable, since both the shoulder belt and the lap belt are rolled up at once when there is a high risk of a vehicle accident.

It is an object of the invention to provide a seat belt device which prevents the vehicle occupant from being over-constrained.

• eine Steuereinheit, die wenigstens einen von Spannungseinstellteilbereichen zum Einstellen einer Spannung eines Schultergurtteilbereichs und eines Beckengurtteilbereichs eines Gurtbandes zum Einzwängen eines Insassen in einem Sitz so steuert, dass eine Spannung des Schultergurtteilbereichs und des Beckengurtteilbereichs demgemäß schrittweise größer wird, wie ein erfasster Abstand zwischen einem Fahrzeug und einem Objekt kleiner wird.

According to one embodiment of the invention, a seat belt device comprises:

• a control unit that controls at least one of tension adjusting portions for adjusting a tension of a shoulder belt portion and a lap belt portion of a seat belt to constrain an occupant in a seat so that a tension of the shoulder belt portion and the lap belt portion gradually increases, such as a detected distance between a vehicle and an object gets smaller.

(Effect of the invention)

According to one embodiment of the invention, a seat belt device may be provided which prevents the vehicle occupant from being over-constrained.

list of figures

• 1A eine schematische Seitenansicht ist, die ein Fahrzeug zeigt, welches ein Beispiel einer Sicherheitsgurtvorrichtung gemäß einer Ausführungsform aufnimmt;
• 2B ein erklärendes schematisches Diagramm ist, das ein Beispiel der Sicherheitsgurtvorrichtung darstellt;
• 2A ein beispielhaftes Blockdiagramm ist, das die Sicherheitsgurtvorrichtung bei der Ausführungsform darstellt;
• 2B ein schematisches Diagramm ist, das ein Beispiel eines ersten Abstands zwischen einem Fahrzeug und einem Objekt darstellt, bei welchem eine Sicherheitsgurtvorrichtung eine Operation durchführt;
• 2C ein erklärendes schematisches Diagramm ist, das eine beispielhafte Operation der Sicherheitsgurtvorrichtung bei dem in 2B gezeigten ersten Abstand darstellt;
• 3A ein schematisches Diagramm ist, das ein Beispiel eines zweiten Abstands zwischen dem Fahrzeug und dem Objekt darstellt, bei welchem die Sicherheitsgurtvorrichtung bei der Ausführungsform eine weitere Operation durchführt;
• 3B und 3C erklärende schematische Diagramme sind, die eine beispielhafte Operation der Sicherheitsgurtvorrichtung bei dem in 3A gezeigten zweiten Abstand darstellen;
• 4A ein schematisches Diagramm ist, das ein Beispiel eines dritten Abstands darstellt, bei welchem die Sicherheitsgurtvorrichtung bei der Ausführungsform eine weitere Operation durchführt;
• 4B und 4C erklärende schematische Diagramme sind, die eine beispielhafte Operation der Sicherheitsgurtvorrichtung bei dem in 4A gezeigten dritten Abstand zwischen dem Fahrzeug und dem Objekt darstellen; und
• 5 ein Ablaufdiagramm ist, das eine beispielhafte Operation der Sicherheitsgurtvorrichtung bei der Ausführungsform zeigt.

Next, the present invention will be explained in more detail in conjunction with the accompanying drawings, wherein:

• 1A FIG. 12 is a schematic side view showing a vehicle accommodating an example of a seatbelt apparatus according to an embodiment; FIG.
• 2 B Fig. 10 is an explanatory schematic diagram illustrating an example of the seat belt device;
• 2A Fig. 10 is an exemplary block diagram illustrating the seatbelt apparatus in the embodiment;
• 2 B FIG. 12 is a schematic diagram illustrating an example of a first distance between a vehicle and an object at which a seat belt device performs an operation; FIG.
• 2C FIG. 4 is an explanatory schematic diagram illustrating an exemplary operation of the seat belt device in the present invention. FIG 2 B represents the first distance shown;
• 3A FIG. 12 is a schematic diagram illustrating an example of a second distance between the vehicle and the object at which the seatbelt apparatus in the embodiment performs another operation; FIG.
• 3B and 3C Explanatory schematic diagrams illustrating an exemplary operation of the seat belt device in the in 3A represent shown second distance;
• 4A FIG. 12 is a schematic diagram illustrating an example of a third distance at which the seat belt device in the embodiment performs another operation; FIG.
• 4B and 4C Explanatory schematic diagrams illustrating an exemplary operation of the seat belt device in the in 4A represent the third distance between the vehicle and the object shown; and
• 5 Fig. 10 is a flowchart showing an exemplary operation of the seat belt device in the embodiment.

Detailed Description of the Preferred Embodiments

(Summary of Embodiments)

A seatbelt apparatus in the embodiment is generally provided with a control unit that controls at least one of tension adjusting portions for adjusting a tension of a shoulder belt portion and a lap belt portion of a webbing so that a tension of the shoulder belt portion and the lap belt portion becomes smaller with a detected distance between a vehicle and a belt Object gradually increases in size to force an occupant in a seat.

The seatbelt apparatus gradually increases a tension of the shoulder belt portion and the lap belt portion according to a distance between a vehicle and an object, and thus can pinch an occupant more appropriately than when he constrains an occupant by instantaneously increasing a tension of the shoulder belt portion and the lap belt portion.

(Embodiment)

(General description of the seat belt device 1 )

1A FIG. 12 is a schematic side view showing a vehicle that takes an example of a seat belt device in an embodiment; FIG. 1B Fig. 10 is an explanatory schematic diagram illustrating an example of the seatbelt apparatus; 2A FIG. 10 is an exemplary block diagram illustrating the seatbelt apparatus in the embodiment; FIG. 2 B FIG. 12 is a schematic diagram illustrating an example of a first distance between a vehicle and an object at which the seatbelt apparatus performs an operation; and FIG 2C FIG. 12 is an explanatory schematic diagram illustrating an exemplary operation of the seatbelt apparatus in the in 2 B represents shown first distance.

A scale ratio in each drawing of the embodiment may be different from the actual scale ratio. Additionally are in 2A Rivers of main signals and information indicated by arrows. Further, the digit area "A - B" means "not smaller than A and not larger than B".

A safety belt device 1 is at eg a seat 70 arranged, which is a driver's seat of a vehicle 7 is how it is in the 1A and 1B is shown. The seat belt device 1 For example, a three-point seat belt device is, but is not limited to, and may be four-point or more. When the seat belt device 1 For example, when a four-point seat belt device is provided, the seat belt device has 1 four tension adjustment sections. The seat belt device 1 may be configured to work in conjunction with seatbelt devices that are disposed on a passenger seat and rear seats so that other occupants are properly constrained and protected.

The seat belt device 1 is general with eg a control unit 24 providing the at least one of tension adjusting portions for adjusting a tension of a shoulder belt portion 10a and a lap belt portion 10b a webbing 10 so that controls a tension of the Schultergurtteilbereichs 10a and the lap belt portion 10b with a decreasing detected distance between the vehicle 7 and an object 9 gradually becomes larger to an occupant 8th in a seat 70 to force, as it is in the 1A to 2C is shown.

The control unit 24 is configured to a shoulder winder 12 which is one of the tension adjusting portions and a tension T _{a of} the shoulder belt portion 10a which mainly occupies a torso of the occupant 8th retains a pacifier 14 which is one of the tension adjusting portions and a tension T _{b of} the lap belt portion 10b which mainly occupies a belly of the occupant 8th retracts, and a buckle drive unit 16 which is one of the tension adjusting portions and the tension T _{a of} the shoulder belt portion 10a and the tension T _{b of} the lap belt portion 10b by driving a buckle 22 adjusts that with a lock tongue 20 is coupled to control.

The webbing 10 is a belt-shaped belt formed of polyester, etc. The webbing 10 is arranged so that, for example, an end on the shoulder reel 12 attached to a pillar 75 is provided, and the other end via an anchorage 18 on the prop 75 is installed, inserted and then on the pool winder 14 attached, as it is in the 1A and 1B is shown. The tongue or tongue plate 20 is on the webbing 10 mounted so that they are on the webbing 10 is freely movable. The lock tongue 20 is configured to work with the buckle 22 Being coupled to a seat base 71 of the seat 70 is arranged.

(Configuration of the shoulder winder 12 )

The shoulder winder 12 is on eg the prop 75 of the vehicle 7 arranged as it is in the 1A and 1B is shown. The shoulder winder 12 is provided with a spool, a motor for rotating the spool and a locking mechanism and also serves as a belt tensioner.

One end of the webbing 10 is attached to the spool or roller. The motor turns the spool and webbing 10 is thereby wound or led out or led out.

The shoulder winder 12 is configured to wind up and take out the webbing 10 based on eg one of the control unit 24 output drive signal S _{1 to be} able, as it is in 2A is shown. The shoulder winder 12 may mainly the tension T _{a of} the Schultergurtteilbereichs 10a by winding or removing the webbing 10 to adjust. When the shoulder winder 12 When a belt tensioner is used, the locking mechanism locks the webbing 10 to stop a lead out.

One on the upper body of the occupant 8th applied load F ₁ is proportional mainly to the tension T _{a of} the Schultergurtteilbereichs 10a , In other words, it works against the backrest 72 of the seat 70 pressing load F ₁ on the occupants 8th due to the tension T _{a of} the shoulder belt portion 10a ,

The shoulder winder 12 increases the tension Ta by winding the webbing 10 to increase the load F ₁ , and reduces the tension T _a by taking out the webbing 10 to reduce the load F ₁ . As such, the shoulder winder exercises 12 a suitable load F ₁ on the occupants 8th whose upper body is characterized by the backrest 72 is supported, and that by a headrest 73 supported head out.

(Configuration of the tank winder 14 )

The basin winder 14 is eg in the seat base 71 of the seat 70 on the right side of the occupant 8th arranged as it is in the 1A and 1B is shown. The basin winder 14 is provided with a spool, a motor for rotating the spool and a locking mechanism and also serves as a belt tensioner.

The other end of the webbing 10 is attached to the coil. The motor turns the spool and webbing 10 is thereby wound up or led out.

The basin winder 14 is configured to wind up and take out the webbing 10 based on eg one of the control unit 24 output drive signal S _{2 to be} able, as it is in 2A is shown. The basin winder 14 can mainly the tension T _{b of} the lap belt portion 10b by winding and removing the webbing 10 to adjust. If the pelvic reel 14 When the belt tensioner is used, the locking mechanism locks the webbing 10 to stop a lead out.

One on a stomach of the occupant 8th applied load F ₂ is mainly proportional to the tension T _{b of} the lap belt portion 10b , In other words, it works against the seat base 71 of the seat 70 pressing load F ₂ on the occupants 8th due to the tension T _{b of} the lap belt portion 10b , The basin winder 14 increases the tension T _{b of} the lap belt portion 10b by winding the webbing 10 to increase the load F ₂ , and reduces the tension T _b by taking out the webbing 10 to reduce the load F ₂ .

The seat belt device 1 in the present embodiment is configured such that the tension T _{b of} the lap belt portion 10b continue through the buckle drive unit 16 can be adjusted, as described below.

The shoulder winder 12 and the basin winder 14 Optionally sensors can have the tension T _a and the tension T _{b of} the webbing 10 by, for example, monitoring the current of the motor.

(Configuration of the buckle drive unit 16 )

The buckle drive unit 16 is with the buckle 22 over eg a wire 16a connected as it is in 1B is shown. The wire 16a extends from the buckle 22 down, turns to a guide 16b then extends toward the front of the vehicle 7 and is with the buckle drive unit 16 connected.

For example, the buckle drive unit pushes 16 based on one of the control unit 24 output drive signal S ₃ the wire 16a by moving towards the back of the vehicle 7 or pull the wire 16a by moving towards the front of the vehicle 7 to the belt buckle 22 to move vertically. The buckle 22 reduces the tension T _{b of} the lap belt portion 10b by moving up and raising the tension T _b by moving down.

Alternatively, the buckle 22 as a modification in an anterior-posterior direction of the vehicle 7 by moving the buckle drive unit 16 in the front-rear direction of the vehicle 7 to be moved.

(Configuration of the control unit 24 )

3A FIG. 12 is a schematic diagram illustrating an example of a second distance between the vehicle and the object at which the seatbelt apparatus performs another operation in the embodiment; FIG. 3B and 3C 13 are explanatory schematic diagrams illustrating an exemplary operation of the seatbelt apparatus in FIG 3A represent the second distance shown, 4A FIG. 12 is a schematic diagram illustrating an example of a third distance at which the seatbelt apparatus performs another operation in the embodiment; and FIG 4B and 4C 13 are explanatory schematic diagrams illustrating an exemplary operation of the seatbelt apparatus in FIG 4A shown third distance between the vehicle and the object represent.

The control unit 24 is a microcomputer, for example, which consists of a CPU (central processing unit) which performs calculation and processing, etc. of the acquired data according to a stored program, a RAM (Random Access Memory) and a ROM (Read Only Memory) which are semiconductor memories. The ROM stores, for example, a program for operation of the control unit 24 and pattern information 240 , The RAM is used as, for example, a memory area for temporarily storing calculation results. The control unit 24 also has a clock signal generating means therein and performs an operation such as a judgment based on the clock signal.

The control unit 24 in the present embodiment is configured to tension the webbing 10 in three stages, as described below.

Detailed eliminated the control unit 24 as it is in the 2A to 4C is shown a slack of the Schultergurtteilbereichs 10a by controlling the shoulder winder 12 when the distance is a first distance L ₁ , the tension T _{b of} the lap belt portion increases 10b to a stomach of the occupant 8th force when the distance is a second distance L ₂ , which is smaller than the first distance L ₁ , and increases the tension T _{a of} the Schultergurtteilbereichs 10a and the tension T _{b of} the lap belt portion 10b further, when the distance is a third distance L ₃ , which is smaller than the second distance L ₂ .

The distance between the vehicle 7 and the object 9 is measured by eg a millimeter wave radar, etc., on the vehicle 7 is appropriate. Then there will be a distance and a time until a collision with the object 9 calculated by, for example, a collision detection device attached to the vehicle 7 is appropriate.

As an example, the collision detection device says a collision with the object 9 , such as another vehicle, beforehand and issue a warning by a display or a sound when there is a possibility of a collision. As an example, when the possibility of a collision becomes higher, the collision detecting device increases an oil pressure to assist braking under a braking operation performed by a driver, or optimally controls a damping force of a suspension damper so as to reduce a collision impact or stability of a vehicle behavior is improved. Further, as an example, the collision detection device is configured to force-activate a brake to reduce an impact in a state in which a collision is unavoidable.

In the present embodiment, a timing for issuing a warning is defined as the first timing, a timing for assisting braking is defined as the second timing, and a timing for forcibly activating a brake, defined as the third timing. As an example, the collision detection device is configured to provide an activation command signal S ₄ corresponding to a respective timing to the seat belt device 1 issue.

The first distance L ₁ is, for example, a distance that causes a collision to be detected, that is, a distance at which a collision occurs within a set time when the vehicle is traveling while there is a speed difference from the object 9 , such as a vehicle, before it, and it is a distance at which a warning of a collision is issued first. In other words, as an example, the first distance L _{1 is} a distance between the vehicle 7 and the object 9 at the first timing.

The first distance L ₁ may be, for example, the above-mentioned distance causing a collision to be detected or a preset inter-vehicle distance, and when both of these distances are used for judgment, the longer of these distances is the first distance L ₁ . Furthermore, the first distance L ₁ to the third distance L _{3 are} not limited to distances on the front side and may be distances for detecting a collision on a side or rear side of the vehicle 7 be.

As an example, the first distance L _{1 is} a distance at which a collision due to a speed difference with respect to the object 9 , such as a vehicle, occurs in front of it in 3 - 4 seconds. Provided that the object 9 For example, as a vehicle is stopped before, the first distance L _{1 is} 25 - 33.3 m when the vehicle 7 at 30 km / h is driven, and is 33.3 - 44.4 m when the vehicle 7 with 40 km / hr. is driven. A time to collision can be arbitrarily set as described above.

As it is in the 2 B and 3A is shown, the second distance L _{2 is} a distance closer to the object 9 as the first distance L ₁ . The second distance L ₂ is, for example, a distance at which a support of braking is triggered. Alternatively, the second distance L _2, for example, an inter-vehicle distance (a distance to the object 9 ) set to be shorter than an inter-vehicle distance set as the first distance L ₁ .

As an example, the second distance L _{2 is} a distance at which a collision due to a speed difference with respect to the object 9 , such as a vehicle, occurs in 1 - 2 seconds before. Provided that the object 9 For example, as a vehicle is stopped before, the second distance L _{2 is} 8.3 - 16.6 m when the vehicle 7 at 30 km / h is driven, and is 11.1 - 22.2 m when the vehicle 7 with 40 km / hr. is driven.

As it is in the 3A and 4A is shown, the third distance L _{3 is} a distance closer to the object 9 as the second distance L ₂ . The third distance L ₃ is a distance at which a collision is unavoidable even if the driver 8th reacted and a brake is forcibly activated.

As an example, the third distance L _{3 is} a distance at which a collision due to a speed difference with respect to the object 9 , such as a vehicle, occurs in 0.3 to 0.5 seconds before. Provided that the object 9 For example, as a vehicle is stopped before, the third distance L _{3 is} 2.5 - 3.3 m when the vehicle 7 at 30 km / h is driven, and is 3.3 - 4.4 m when the vehicle 7 with 40 km / hr. is driven.

The control unit 24 performs an operation corresponding to the first distance L ₁ to the third distance L ₃ based on, eg, the obtained activation command signal S ₄ . Alternatively, the control unit 24 be configured to obtain, for example, a signal indicating the distance from the first distance L ₁ to the third distance L ₃ , and to operate based on the signal.

The control unit 24 has eg the pattern information 240 as it is in 2A is shown. The pattern information 240 is eg information about a drive pattern of the shoulder retractor 12 , etc. The control unit 24 generates the drive signals S ₁ to S ₃ based on the distance and the pattern information 240 and outputs the signals to objects to be driven. How to control at distances from the first distance L ₁ to the third distance L ₃ will be described below.

(Control at the first distance L ₁ )

If the distance between the vehicle 7 and the object 9 based on the activation command signal S _4, for example, the first distance L ₁ , generates the control unit 24 the drive signal S ₁ based on the pattern information 240 and gives the signal to the shoulder winder 12 to slack (slippage) of the shoulder belt portion 10a to eliminate, as in the 2 B and 2C is shown.

Based on the drive signal S ₁ , the shoulder retractor rotates 12 a coil or roll 120 by driving the engine and wrapping the webbing 10 to thereby slip the shoulder belt portion 10a to eliminate. At the same time the shoulder retractor locks 12 the webbing 10 by the locking mechanism to stop the lead-out.

At the first distance L ₁ , the webbing 10 wound up to the extent that it does not prevent the driver 8th a steering wheel 76 grasps.

(Control at the second distance L ₂ )

If the distance between the vehicle 7 and the object 9 based on the activation command signal S _{4 is} the second distance L ₂ , increases the control unit 24 the tension T _{b of} the lap belt portion 10b to a belly of the driver 8th in the seat 70 cramping. The control unit controls in detail 24 for example, the buckle drive unit 16 to the tension T _{b of} the lap belt portion 10b and increase the tension T _{a of} the shoulder belt portion, or controls the pelvic reel 14 to the tension T _{b of} the lap belt portion 10b to increase, as it is in the 3A to 3C is shown.

If you have the buckle drive unit 16 controls, generates the control unit 24 the drive signal S ₃ based on the pattern information 240 and gives the signal to the buckle drive unit 16 to thereby the tension T _{b of} the lap belt portion 10b and the tension T _{a of} the shoulder belt portion 10a to increase, as is in 3B is shown. At the same time locks the buckle drive unit 16 the movement of the buckle 22 ,

At this stage, there is the slippage of the shoulder belt portion 10a has already been eliminated, a movement amount of the buckle 22 smaller and will obtain a required tension in a shorter time than when the slip is not eliminated.

If the buckle drive unit 16 is controlled, the tension T _{a of} the Schultergurtteilbereichs 10a also increased. Therefore, the tension T _a set at the first distance L _{1 may} be smaller, so that a suitable tension T _a can be obtained when the buckle driving unit 16 is driven.

In the meantime, the control unit generates 24 then, if they have the pool winder 14 controls the drive signal S ₂ based on the pattern information 240 and gives the signal to the pool winder 14 to thereby the tension T _{b of} the lap belt portion 10b to increase, as is in 3C is shown. Based on the drive signal S ₂ , the pelvic reel rotates 14 a coil 140 by driving the engine and wrapping the webbing 20 to thereby increase the voltage T _b . At that time, the pool winder locked 14 the webbing 10 by the locking mechanism to stop the lead-out.

If the pelvic reel 14 is controlled, is mainly the tension T _{b of} the lap belt portion 10b elevated. Therefore, at the first distance L _1, the shoulder winder becomes 12 so driven that the shoulder belt portion 10a has a suitable voltage T _a .

At the second distance L ₂ , the webbing 10 wound up to the extent that one foot of the driver 8th not from the brake pedal 77 takes off.

(Control at the third distance L ₃ )

If the distance between the vehicle 7 and the object 9 based on the activation command signal S _{4 is} the third distance L ₃ , increases the control unit 24 the tension T _{a of} the Schultergurtteilbereichs 10a and the tension T _{b of} the lap belt portion 10b further. Detailed drives the control unit 24 the shoulder winder 12 and the buckle drive unit 16 or drive the shoulder winder 12 and the basin winder 14 as it is in the 4B and 4C is shown. For example, it takes about 0.1 seconds to drive the retractors and the buckle drive unit.

If you have the shoulder winder 12 and the buckle drive unit 16 controls, generates the control unit 24 the drive signals S ₁ and S ₃ based on the pattern information 240 and outputs it to the tension T _{a of} the shoulder belt portion 10a and the tension 10b of the lap belt portion 10b to increase more than one increase at the second distance L ₂ , as in 4B is shown.

In the meantime, the control unit generates 24 then, if they have the shoulder winder 12 and the basin winder 14 controls the drive signals S ₁ and S ₂ based on the pattern information 240 and outputs it to the tension T _{a of} the shoulder belt portion 10a and the tension T _{b of} the lap belt portion 10b to increase more than one increase at the second distance L ₂ , as in 4C is shown.

When, during the time when a voltage is being set to the distance from the first distance L ₁ to the third distance L ₃ , an unlocking command signal S _{5 is applied} to the control unit 24 is entered, the control unit stops 24 outputting the drive signals to remove the applied voltage. The unlocking command signal S ₅ is, for example, one of the collision detecting device, etc., of the vehicle 7 output signal to indicate that a collision has been avoided.

Next, an exemplary operation of the seatbelt apparatus will be described 1 in the present embodiment, using a flowchart of FIG 5 to be discribed.

(Surgery)

The control unit 24 the seat belt device 1 monitors whether the activation command signal S _{4 is} input or not. If in one step 1 "Yes" is judged, ie when the control unit 24 the activation command signal S ₄ receives and judges that the distance between the vehicle 7 and an object 9 the first distance L ₁ is (step 1 : Yes), eliminates the control unit 24 a slippage of the shoulder belt portion 10a (Step 2).

Next, the control unit controls 24 then, if the control unit 24 receives the activation command signal S ₄ and judges that the distance reached the second distance L ₂ (step 3: Yes), the buckle drive unit 16 to the tension T _{b of} the lap belt portion 10b and to increase the tension T _{a of} the shoulder belt portion, or it controls the pelvic reel 14 to the tension T _{b of} the lap belt portion 10b increase (step 4).

Next, the control unit increases 24 then, if the control unit 24 receives the activation command signal S ₄ and judges that the distance reached the third distance L ₃ (step 5: Yes), a tension of the shoulder belt portion 10a and the lap belt portion 10b continue (step 6).

If, before reaching the second distance L ₂ (step 3: No), a collision is avoided and the unlocking instruction signal S _{5 is} input (step 7 : Yes), loosens the control unit 24 the applied voltage (step 9 ).

On the other hand, when the distance does not reach the second distance L ₂ and the unlocking command signal S _{5 is} not input (step 7 : No), processing goes back to step 3 and monitors the control unit 24 an input of the activation command signal S ₄ .

Meanwhile, when reaching a third distance L ₃ (step 5: No), a collision is avoided and the unlocking command signal S _{5 is} inputted (step 8th : Yes), the control unit 24 the applied voltage (step 9 ).

Further, when the distance does not reach the third distance L ₃ and the unlocking instruction signal S _{5 is} not input (step 8th : No), processing back to step 5 and monitoring the control unit 24 an input of the activation command signal S ₄ .

(Effects of the Embodiment)

The seat belt device 1 In the present embodiment, the occupants 8th to constrain in a suitable way. In detail, the seat belt device increases 1 a tension of the shoulder belt portion 10a and the lap belt portion 10b according to the distance between the vehicle 7 and the object 9 gradually and thus can the inmates 8th constraining it when it constrains an occupant by momentarily increasing tension of the shoulder belt portion and the lap belt portion.

Because the seat belt device 1 a slippage of the shoulder belt portion 10a eliminated at the first distance L ₁ , the amount of movement of the buckle is 22 when driven at the second first distance L ₂ , smaller than when the slip is not eliminated, and thus it is possible to increase the size of a mechanism for driving the buckle 22 to reduce. In addition, due to such a small amount of movement, the seatbelt apparatus can 1 apply a required tension in a short time.

Because the seat belt device 1 a shuffle of the shoulder belt portion 10a eliminated at the first distance L ₁ , the extent of the webbing 10 By driving the pelvic winder 14 is wound on the second first distance L ₂ is less than that when the slip is not eliminated, and it is thus possible, the magnitude of the Beckenaufrollers 14 to reduce. In addition, the seat belt device may 1 due to such a small Aufwickelausmaßes exercise a required voltage in a short time.

After eliminating the slippage of the shoulder belt portion 10a at the first distance L ₁ increases the seat belt device 1 a tension of the lap belt portion 10b at the second distance L ₂ . Therefore, in comparison with when this configuration is not used, the take-up amounts of the shoulder belt portion become 10a and the lap belt portion 10b optimized, resulting in a higher constriction of the occupant 8th provides and also allows the size of the shoulder winder 12 and the pelvic winder 14 is reduced.

At the first distance L ₁ , the seat belt device 1 even if the shoulder belt portion 10a mostly loose and on the steering wheel 76 lies, the shoulder belt portion 10a return to a suitable shape. In comparison with when such a configuration is not used, the take-up amount of the webbing is 10 , etc., at the second distance L ₂ and at the third distance L ₃ smaller and the seat belt device 1 can be driven in less time. Therefore, it is possible to reduce an impact of a collision or an effect caused by activation of an airbag.

Because the seat belt device 1 a tension increases gradually, it is possible the occupants 8th depending on the situation of the vehicle 7 appropriate to constrain and an uncomfortable feeling for the occupant 8th in comparison with when an occupant is severely constrained at an initial time.

Although some of an embodiment and modifications of the invention have been described, the embodiment and the modifications are only an example, and the invention according to claims is not to be limited thereto. The novel embodiment and the modifications may be implemented in various other forms, and various omissions, supplements, and alterations, etc., may be made without departing from the gist of the invention. In addition, not all combinations of the features described in the embodiment and the modifications are necessary to solve the problem of the invention. Furthermore, the embodiment and the modifications are included within the scope and spirit of the invention and also within the invention described in the claims and the range of equivalents.

LIST OF REFERENCE NUMBERS

1

SAFETY DEVICE

7

VEHICLE

8th

INMATE

9

OBJECT

10

GURTBAND

10a

SCHULTERGURTTEILBEREICH

10b

BECKENGURTTEILBEREICH

12

SCHULTE UP ROLLER

14

BECKENAUFROLLER

16

BUCKLE-DRIVE UNIT

16a

WIRE

16b

GUIDE

18

ANCHORING

20

LOCK TONES or TONGUE PLATE

22

COURT LOCK or BUCKLE

24

CONTROL UNIT

70

SEAT

71

SEAT BASE

72

BACKREST

73

HEADREST

75

SUPPORT or PILLAR

76

STEERING WHEEL

77

BRAKE PEDAL

120

SPOOL or ROLL

140

SPOOL or ROLL

240

SAMPLE INFORMATION

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• JP 2004148968 A [0002]

Claims (5)

A seat belt device comprising: a control unit that controls at least one of tension adjusting portions for adjusting a tension of a shoulder belt portion and a lap belt portion of a webbing to constrain an occupant in a seat so that a tension of the shoulder belt portion and the lap belt portion increases accordingly, such as a detected distance between a vehicle and an object gets smaller. Seat belt device according to Claim 1 wherein the control unit controls a shoulder retractor as one of the tension adjusting portions so that a tension to eliminate slack of the shoulder belt portion is applied to the shoulder belt portion when the detected distance becomes a first distance, a tension of the lap belt portion is increased to a stomach of the occupant when the detected distance becomes a second distance smaller than the first distance, and a tension of the shoulder belt portion and the lap belt portion is further increased when the detected distance becomes a third distance smaller than the second distance. Seat belt device according to Claim 2 wherein, when the detected distance becomes the second distance, the control unit controls a buckle drive unit as one of the tension adjusting portions for driving a buckle to increase a tension of the lap belt portion and the shoulder belt portion, or a pelvic winder as one of the tension adjusting portions one end of the lap belt portion, controls to increase a tension of the lap belt portion. Seat belt device according to Claim 2 wherein, when a signal to indicate that a collision of the vehicle and the object is avoided is input to the control unit before the detected distance becomes the second distance, the control unit controls the shoulder winder to increase the tension applied to the shoulder belt portion loosen. Seat belt device according to Claim 2 wherein, when a signal to indicate that a collision of the vehicle and the object is avoided is input to the control unit before the detected distance becomes the third distance, the control unit controls the shoulder winder about the shoulder belt portion and the lap belt portion exerted the tension to relax.

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