JP6973108B2 - Pretensioner control device and pretensioner control method - Google Patents

Description

Embodiments of the present invention relate to a pretensioner control device and a pretensioner control method.

Conventionally, there is a seatbelt device as a safety device for preventing an occupant from being thrown out of the seat in the event of a vehicle collision by restraining the occupant's body in the seat. Further, in recent years, a pretensioner has been developed that more reliably restrains and protects the occupant's body by forcibly pulling in the webbing in the event of a collision.

Furthermore, recently, in order to facilitate loading and unloading of luggage into and out of the luggage compartment on the rear seat side, for example, a so-called wrap-outer-separated seatbelt device that makes it possible to detach the previously fixed webbing wrap-outer side. Is appearing.

Japanese Unexamined Patent Publication No. 2016-68751 Japanese Unexamined Patent Publication No. 2005-219535

However, for example, when a pretensioner (also referred to as a retractor pretensioner) that pulls in the webbing on the retractor side is provided for the seatbelt device with a separate lap outer, the tongue provided at the end of the webbing on the lap outer side is fixed in the event of a vehicle collision. If the pretensioner is activated in the unchecked state, the tongue that swings due to inertia is accelerated by the pulling in of the webbing, which may collide with the vehicle interior wall, the window, or the like and damage them.

Therefore, in the present invention, even when the retractor pretensioner is provided in the seatbelt device with a separate lap outer, the tongue provided at the end on the lap outer side damages the vehicle interior wall, the window, etc. due to the pulling in of the webbing at the time of a vehicle collision. It is an object of the present invention to provide a pretensioner control device and a pretensioner control method capable of avoiding the accident.

In order to achieve such an object, the pretensioner control device according to the present invention is provided on a retractor in which one end winds a webbing that can be detached from the vehicle seat from the other end to increase the tension acting on the webbing. A pretensioner control device that controls the pretensioner to be operated, and is a first sensor that detects whether or not an inner tongue slidably provided on the webbing is inserted into an inner buckle provided on the vehicle seat. A second sensor that detects or predicts a collision of a vehicle equipped with the pretensioner control device, a seating sensor that detects whether or not an occupant is seated on the vehicle seat, and the second sensor. If the seating sensor detects the seating of the occupant when the collision of the vehicle is detected or predicted, and the first sensor detects the attachment of the inner tongue to the inner buckle, the pretensioner The first sensor does not detect the attachment of the inner tongue to the inner buckle, and the pretensioner is not activated. Further, the pretensioner control device according to the present invention controls a pretensioner that is provided on a retractor that winds up a webbing whose one end can be detached from a vehicle seat from the other end to increase the tension acting on the webbing. Whether or not the inner tongue slidably provided on the webbing is inserted into the inner buckle provided on the vehicle seat in the pretensioner control device, or one end thereof is located at any position. The first sensor that detects whether or not the vehicle is held, the second sensor that detects or predicts the collision of the vehicle equipped with the pretensioner control device, and the second sensor detects or predicts the collision of the vehicle. At that time, the control unit that does not operate the pretensioner unless the first sensor detects that the inner tongue is attached to the inner buckle or that one end of the inner tongue is held at any position. And.

According to the present invention, even when the retractor pretensioner is provided in the seatbelt device with a separate lap outer, it is possible to prevent the mini tongue from damaging the vehicle interior wall, the window, etc. due to the pulling in of the webbing at the time of a vehicle collision. Possible pretensioner control devices and pretensioner control methods can be provided.

FIG. 1 is a diagram showing a schematic configuration example of a seatbelt device and a vehicle seat provided with a pretensioner controlled by the pretensioner control device according to the embodiment. FIG. 2 is a diagram for explaining a state in which the seatbelt device shown in FIG. 1 is in an unused state and the mini tongue is held by the belt hanger. FIG. 3 is a diagram for explaining another state of the seatbelt device shown in FIG. 1 when not in use, in which the mini tongue is not held by the belt hanger. FIG. 4 is a block diagram showing a schematic configuration example of the pretensioner control device according to the first embodiment. FIG. 5 is a diagram showing a schematic configuration example of an inner buckle and an inner tongue according to the first embodiment. FIG. 6 is a diagram for explaining a current flowing through the non-contact sensor according to the embodiment. FIG. 7 is a flowchart showing an example of the pretensioner control operation according to the embodiment. FIG. 8 is a block diagram showing a schematic configuration example of the pretensioner control device according to the second embodiment.

Hereinafter, the pretensioner control device and the pretensioner control method according to the embodiment of the present invention will be described in detail with reference to the drawings.

(First Embodiment)
In the first embodiment, a pretensioner control device for controlling a pretensioner provided for a seatbelt device mounted on a vehicle and a pretensioner control method will be described with reference to specific examples. The vehicle according to the present embodiment may be, for example, an automobile having an internal combustion engine such as a gasoline engine as a drive source (internal combustion engine automobile), or an automobile having an electric motor (also referred to as an electric motor) as a drive source (also referred to as an electric motor). It may be an electric vehicle, a fuel cell vehicle, etc.) or a vehicle (hybrid vehicle) using both of them as a drive source. In addition, the vehicle can be equipped with various transmissions, and can also be equipped with various devices (systems, parts, etc.) necessary for driving an internal combustion engine or an electric motor.

FIG. 1 is a diagram showing an excerpt of a part of the vehicle interior of the vehicle according to the first embodiment of the present invention, and is a seat provided with a pretensioner controlled by the pretensioner control device according to the present embodiment. It is a figure which shows the schematic structure example of a belt device and a vehicle seat. In FIG. 1 and the following drawings, the arrow F indicates the front side of the vehicle in the vehicle front-rear direction, the arrow W indicates the left side of the vehicle in the vehicle width direction, and the arrow U indicates the upper side of the vehicle in the vehicle height direction.

As shown in FIG. 1, a vehicle seat 20 and a seatbelt device 10 on which the occupant P is seated are provided in the vehicle interior of the vehicle. The vehicle seat 20 includes a seat cushion 23 on which the occupant P sits, a seat back 21 arranged at the rear end of the seat cushion 23 and supported by a reclining mechanism so as to be tiltable, and an upper end portion of the seat back 21. It is configured to include a headrest 22 provided in the occupant P and supporting the head of the occupant P.

On the other hand, the seatbelt device 10 is a wrap outer separation type seatbelt device, and includes a webbing 11, a retractor 12, a shoulder anchor 13, an inner tongue 14, an inner buckle 15, a mini tongue 16, and an anchor buckle 17.

The webbing 11 is a belt-shaped belt, and a mini tongue 16 is provided at an end on the wrap outer side, and the other end is configured to be retractably wound by a retractor 12. Further, the webbing 11 is provided with a slidable inner tongue 14. Although not shown, a protrusion for locking the inner tongue 14 is provided at a position of a predetermined length from the end of the webbing 11 on the lap outer side. Therefore, the inner tongue 14 is configured so as not to slide toward the lap outer side due to the protrusion.

The mini tongue 16 is inserted into and engaged with an anchor buckle 17 provided at the outer rear side in the vehicle width direction W with respect to the seat cushion 23. Further, by pressing a release button (not shown) provided on the anchor buckle 17, the engagement between the mini tongue 16 and the anchor buckle 17 is released. That is, the mini tongue 16 and the anchor buckle 17 are mechanisms for realizing the lap outer separation type, and the mini tongue 16 is detachably inserted into the anchor buckle 17. Then, by inserting (inserting) the mini tongue 16 into the anchor buckle 17 and engaging (inserting) the mini tongue 16, the end of the webbing 11 on the lap outer side is held behind the outside of the vehicle width direction W with respect to the seat cushion 23. .. The location of the release button for releasing the engagement between the mini tongue 16 and the anchor buckle 17 is not limited to the anchor buckle 17, and may be variously changed such as the mini tongue 16.

The retractor 12 has a function of winding the webbing 11 so as to be able to be pulled out, and is fixed to, for example, a position on the outer rear side in the vehicle width direction W with respect to the seat cushion 23.

The shoulder anchor 13 is for folding back the webbing 11, and is arranged diagonally above the outside of the vehicle width direction W and behind the vehicle front-rear direction F with respect to the seat back 21. The retractor 12 described above is located below the vehicle height direction U with respect to the shoulder anchor 13.

The inner buckle 15 is provided inside the vehicle width direction W at the rear of the seat cushion 23. An inner tongue 14 through which a webbing 11 is inserted is inserted into and engaged with the inner buckle 15. By pressing the release button of the inner buckle 15, the engagement between the inner tongue 14 and the inner buckle 15 is released. That is, the inner tongue 14 is detachably inserted into the inner buckle 15. Then, by inserting (inserting) the inner tongue 14 into the inner buckle 15, the inner tongue 14 is held inside the vehicle width direction W at the rear of the seat cushion 23, thereby webbing. 11 is attached to the occupant P seated on the vehicle seat 20.

Further, in the present embodiment, the retractor 12 is provided with a pretensioner 110. The pretensioner 110 is a device that forcibly winds up the webbing 11 to increase the tension acting on the webbing 11, removes the slack of the webbing 11, and attracts the occupant P to the vehicle seat 20.

Here, as shown in FIG. 2, when the seatbelt device 10 is not in use, the portion of the webbing 11 near the mini tongue 16 is hooked or pinched by the belt hanger 18 provided on the cover of the retractor 12. The mini tongue 16 can be held so that it does not swing. This makes it possible to prevent the mini tongue 16 from swinging due to inertia when the vehicle is running. However, when the portion of the webbing 11 near the mini tongue 16 is not hooked or pinched by the belt hanger 18 when not in use, the mini tongue 16 swings due to inertia as shown by the broken line arrow in FIG. Then, in the event of a vehicle collision or the like, the pretensioner 110 operates and the webbing 11 is wound up, so that the swinging mini tongue 16 accelerates. As a result, the mini tongue 16 may come into contact with the vehicle interior wall, the window, or the like and damage them.

Therefore, in the present embodiment, the pretensioner 110 is prevented from operating when the seatbelt device 10 is not in use. As a result, it is possible to reduce the possibility that the mini tongue 16 that swings at the time of a collision or the like accelerates and damages the vehicle interior wall, the window, or the like.

FIG. 4 is a block diagram showing a schematic configuration example of the pretensioner control device according to the present embodiment. As shown in FIG. 4, the pretensioner control device 100 includes a non-contact sensor (first sensor) 151 provided in the inner buckle 15, a collision detection sensor (second sensor) 103, and a control unit 101. .. In FIG. 4, seatbelt devices 10 are provided on the leftmost vehicle seat 20 and the rightmost vehicle seat 20 of the three-seat seats provided as the rear seats of the vehicle, and these seatbelts are provided. The pretensioner control device 100 for controlling the pretensioner 110 provided in the device 10 is shown. For the sake of clarification, in the following description, regarding the configuration for the vehicle seat 20 at the left end of the three-seater seat, an'L'is added to the end of the code, and the configuration for the vehicle seat 20 at the right end is added. For, add'R'to the end of the code. Further, in FIG. 4, the code of the inner buckle of the seatbelt device 10 provided in the central vehicle seat 20 of the three-seater seat is 15C, and the seatbelt device 10 is provided with the pretensioner 110. The case where it is not is illustrated.

In the configuration shown in FIG. 4, the non-contact sensor 151 is a non-contact sensor such as a hall switch or a magnetoresistive switch, and is a sensor for detecting whether or not the inner tongue 14 is inserted into the inner buckle 15. be. The non-contact sensor 151 is provided in, for example, inside the inner buckle 15, and detects whether or not the inner tongue 14 is inserted into the inner buckle 15 in a non-contact manner.

However, the installation position of the non-contact sensor 151 is not limited to the inner buckle 15, and is located in the inner buckle 15 such as in or near the inner buckle 15, in or near the anchor buckle 17, or in or near the retractor 12 provided with the belt hanger 18. Various changes can be made as long as it is possible to detect that the inner tongue 14 is inserted or the mini tongue 16 is held at any position. Further, the non-contact sensor 151 is not limited to the above-mentioned hole switch, magnetic resistance switch, or the like, and the inner tongue 14 is inserted into the inner buckle 15, or the mini tongue 16 is located at any position. In addition to being held, it is possible to constantly detect with a weak current or the like whether or not the wiring connecting the non-contact sensor 151 and the control unit 101 (for example, the wire harness 153 described later) is broken. If it is a sensor, various sensors can be used.

The collision detection sensor 103 is a sensor that detects that a vehicle has collided immediately after the collision. For this collision detection sensor 103, for example, an acceleration sensor or the like can be used.

However, instead of the collision detection sensor 103 that detects whether or not the vehicle has collided immediately after the collision, it is also possible to use a collision prediction sensor that predicts whether or not the vehicle will collide immediately before the collision. In that case, collision detection in the following description is replaced by collision prediction. Such collision prediction sensors include, for example, millimeter-wave radars, stereo cameras, vehicle stability control (VSC) systems such as antilock braking system (ABS), rollover sensors, and the like. Can be used.

The control unit 101 is an information processing unit composed of, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc., and is a signal from the collision detection sensor 103 and a non-contact sensor 151. It is determined whether or not to operate the pretensioner 110 based on the current of the above, and the pretensioner 110 is operated according to the determination result. For example, in the control unit 101, when a collision is detected by a signal from the collision detection sensor 103, the inner tongue 14 is inserted into the inner buckle 15 based on the current value of the current from the non-contact sensor 151. If it is detected, it is determined that the pretensioner 110 is activated, and the pretensioner 110 is activated according to the determination result. As a result, the webbing 11 is forcibly wound up at the time of a collision, so that the occupant P can be more reliably restrained by the vehicle seat 20.

The control unit 101 may be incorporated in an airbag (A / B) ECU (Engine Control Unit) or the like for operating an airbag device (not shown) when a collision is detected by the collision detection sensor 103. , It may be composed of a separate chip different from these.

Here, the configuration of the inner buckle 15 provided with the non-contact sensor 151 according to the present embodiment will be described in detail with reference to FIG. FIG. 5 is a diagram showing a schematic configuration example of an inner buckle and an inner tongue according to the present embodiment. As shown in FIG. 5, the inner tongue 14 has a tongue plate 141 provided with a through hole 143 through which the webbing 11 is inserted as a main member. On the other hand, the inner buckle 15 is provided with an opening 159, and by inserting the tip 142 of the tongue plate 141 into the opening 159, the tip 142 engages with the engaging portion in the inner buckle 15. As a result, the inner tongue 14 is configured to be fixed to the inner buckle 15. By pressing the release button 158 of the inner buckle 15, the tip portion 142 is disengaged, whereby the inner tongue 14 can be disengaged from the inner buckle 15.

Further, inside the inner buckle 15, in addition to the non-contact sensor 151 described above, a belt wearing sensor 152 for detecting that the inner tongue 14 is inserted into the inner buckle 15 is provided. The belt wearing sensor 152 is, for example, a contact type sensor, and the inner tongue 14 is inserted into the inner buckle 15 by contacting the tip portion 142 of the tongue plate 141 inserted into the inner buckle 15 from the opening 159. Detects that it has been done.

One end of a particular wire in, for example, a wire harness 153 is connected to the belt wearing sensor 152. At the other end of the wiring connected to the belt wearing sensor 152, a connector 155 for connecting to the current meter 102 is provided. Therefore, the current flowing through the belt wearing sensor 152 is input to the current meter 102 via the wire harness 153.

Further, as shown in FIG. 4, a seating sensor 24 is provided in the wiring connected to the belt wearing sensor 152 in the wire harness 153 so as to be connected in series to the belt wearing sensor 152. Therefore, the current meter 102 is configured so that the current flowing through the belt wearing sensor 152 flows when the seating sensor 24 detects the seating of the occupant P. Then, the current value of the current flowing through the belt wearing sensor 152 detected by the current meter 102 is determined by an ECU (not shown) as to whether or not to execute a notification for urging the occupants including the driver to wear the belt. Used when doing.

On the other hand, as shown in FIG. 5, the non-contact sensor 151 is connected to, for example, one end of another particular wire in the wire harness 153. At the other end of the wiring connected to the non-contact sensor 151, a connector 154 for connecting to the control unit 101 is provided. Therefore, the current flowing through the non-contact sensor 151 is input to the control unit 101 via the wire harness 153.

In this way, by providing the non-contact sensor 151 for detecting whether or not the inner tongue 14 is inserted into the inner buckle 15 in the inner buckle 15, the wire harness 153 used in the belt wearing sensor 152 can be used. This makes it possible to minimize design changes to the in-vehicle infrastructure.

Subsequently, the non-contact sensor 151 is used as a sensor for detecting that the inner tongue 14 is inserted into the inner buckle 15 or the mini tongue 16 is held at some position. The merits of using it will be explained. FIG. 6 is a diagram for explaining the current flowing through the non-contact sensor 151. The non-contact sensor 151 is turned on when the inner tongue 14 is attached to the inner buckle 15, and turned off when the inner tongue 14 is not attached.

As shown in FIG. 6, for example, the non-contact sensor 151 composed of a hall switch, a magnetoresistive switch, or the like is in an off state (duration of t0 to t1, t2 to t3) after activation (timing t0), for example. A weak current of about 4 to 7 mA (milliampere) (hereinafter referred to as a LOW level (or first current value) current) flows. Therefore, during the period when the non-contact sensor 151 is off, a LOW level current is input to the control unit 101. On the other hand, in the on state (duration of t1 to t2), a current of, for example, about 12 to 18 mA (hereinafter referred to as a HIGH level (or a second current value) current) flows through the non-contact sensor 151. Therefore, while the non-contact sensor 151 is on, a HIGH level current is input to the control unit 101.

On the other hand, in the state where the wire harness 153 connecting the non-contact sensor 151 and the control unit 101 is disconnected (the period after t3), no current flows through the non-contact sensor 151. Therefore, the current value of the current input to the control unit 101 is zero current (0 mA).

In this way, by using the non-contact sensor 151 in which a weak current flows in the off state, the inner tongue 14 is inserted into the inner buckle 15 (on state) and the inner tongue 14 is the inner buckle 15. It is possible to distinguish and detect three states, that is, a state in which the wire harness 153 is not inserted (off state) and a state in which the wire harness 153 is disconnected. As a result, it is possible to more reliably detect the case where the pretensioner control device 100 is not operating normally due to a disconnection or the like, so that the pretensioner control device 100 can be operated more normally.

Subsequently, the pretensioner control operation executed by the pretensioner control device 100 according to the present embodiment will be described in detail with reference to the drawings. FIG. 7 is a flowchart showing an example of the pretensioner control operation according to the present embodiment. In the following description, attention will be paid to the operation of the control unit 101.

As shown in FIG. 7, in this operation, the control unit 101 detects the current value i of the current input from the non-contact sensor 151 after activation (step S101), and subsequently, the detected current value i. Is larger than the preset first threshold value i_th1 (step S102). Here, the first threshold value i_th1 is set to a value larger than 0 mA and smaller than the current value of the LOW level, for example. As a result, the control unit 101 can determine two states, one is the wire harness 153 and the other is the wire harness 153, based on the detected current value i. ..

When the current value i is equal to or less than the first threshold value i_th1 (NO in step S102), the control unit 101 determines that the wire harness 153 connecting the non-contact sensor 151 and the control unit 101 is broken, for example. By driving the display device and the voice output device provided on the dashboard (instrument panel) in the vehicle interior, an alarm is issued to the occupants including the driver (step S103), and then this operation is terminated. It should be noted that a configuration is also conceivable in which the operation of the pretensioner 110 is prioritized over whether or not the inner tongue 14 is inserted into the inner buckle 15 at the time of disconnection. In such a configuration, when the current value i is equal to or less than the first threshold value i_th1 (NO in step S102), the control unit 101 indicates that a collision has been detected from the collision detection sensor 103 (referred to as a collision detection signal). ) May be operated to operate the pretensioner 110 in response to the input of).

On the other hand, when the current value i is larger than the first threshold value i_th1 (YES in step S102), the control unit 101 next determines whether or not a collision detection signal has been input from the collision detection sensor 103 (step S104). .. When the collision detection signal is not input (NO in step S104), the control unit 101 returns to step S101 and continues the subsequent operations. On the other hand, when the collision detection signal is input (YES in step S104), the control unit 101 determines whether or not the current value i detected in step S101 is larger than the second threshold value i_th2 set in advance. Is determined (step S105). Here, the second threshold value i_th2 is set to, for example, a value larger than the current value of the LOW level and smaller than the current value of the HIGH level. As a result, the control unit 101 can determine two states, whether the non-contact sensor 151 is on or off, based on the detected current value i.

When the current value i is equal to or less than the second threshold value i_th2 (NO in step S105), that is, when the inner tongue 14 is not inserted into the inner buckle 15, the control unit 101 skips step S106. End the operation. On the other hand, when the current value i is larger than the second threshold value i_th2 (YES in step S105), that is, when the inner tongue 14 is normally inserted into the inner buckle 15, the control unit 101 operates the pretensioner 110. (Step S106), and then the operation is terminated.

As described above, in the present embodiment, when the inner tongue 14 is not inserted into the inner buckle 15 or the mini tongue 16 is not held at any position, that is, by the operation of the pretensioner 110 at the time of collision. When the mini tongue 16 is accelerated, the pretensioner 110 is not activated. As a result, according to the present embodiment, even when the pretensioner 110 is provided in the retractor 12 of the seatbelt device 10 with a separate lap outer, the mini tongue 16 pulls in the webbing 11 at the time of a vehicle collision so that the mini tongue 16 can cover the vehicle interior wall, the window, and the like. It is possible to avoid damaging it.

(Second embodiment)
Next, the pretensioner control device and the pretensioner control method according to the second embodiment will be described in detail with reference to the drawings. In the following description, the same configurations and operations as those of the first embodiment will be referred to, and duplicate description will be omitted.

In the first embodiment described above, the configuration for detecting that the inner tongue 14 is inserted into the inner buckle 15 or that the mini tongue 16 is held at some position. As an example, a case where the non-contact sensor 151 is provided in the inner buckle 15 separately from the belt wearing sensor 152 for detecting whether or not the seat belt is worn is illustrated. On the other hand, in the second embodiment, the case where the non-contact sensor 151 can be used together as the belt wearing sensor 152 is illustrated.

FIG. 8 is a block diagram showing a schematic configuration example of the pretensioner control device according to the present embodiment. As shown in FIG. 8, in the pretensioner control device 200 according to the present embodiment, in the same configuration as the pretensioner control device 100 shown in FIG. 4, the inner buckle 15L and the belt wearing sensor 152 in the 15R are omitted. In addition, the non-contact sensor 151 in the inner buckles 15L and 15R is connected to the current meter 102 via the wire harness 153. That is, in this embodiment, the connector 154 shown in FIG. 5 is connected to the current meter 102. Further, the pretensioner control device 200 is also configured to input a signal from the current meter 102 to the control unit 101.

In such a configuration, whether or not the occupant P seated on the vehicle seat 20 is wearing a seatbelt depends on the current value of the current from the seating sensor 24 and the current value of the current from the non-contact sensor 151. Judgment is based on both. For example, when both the current input from the seating sensor 24 and the current input from the non-contact sensor 151 are current values indicating an on state, the current meter 102 wears a belt to the occupants including the driver. A signal indicating that the occupant P is wearing the seat belt is output to the ECU that determines whether or not to execute the notification prompting the user, and at least the current from the seating sensor 24 and the current from the non-contact sensor 151 are output. When one of them has a current value indicating an off state, a signal indicating that the occupant P is not wearing the seat belt is output to this ECU. However, not limited to this, whether the current meter 102 inputs the respective current values of the current from the seating sensor 24 and the current from the non-contact sensor 151 to the ECU, and the occupant P wears a seatbelt on the ECU side. You may decide whether or not.

On the other hand, a signal indicating the current value of the current input from the non-contact sensor 151 is input from the current meter 102 to the control unit 101. Based on the signal input from the current meter 102, the control unit 101 correctly determines whether or not the wire harness 153 connecting the non-contact sensor 151 and the current meter 102 is broken, and the inner tongue 14 is correctly attached to the inner buckle 15. It is determined whether or not the pretensioner 110 is inserted, and based on the determination result, it is determined whether or not to operate the pretensioner 110. Since the operation of the control unit 101 according to the present embodiment may be the same as the operation described with reference to FIG. 7 in the first embodiment, detailed description thereof will be omitted here.

As described above, according to the present embodiment, it is possible to reduce the number of parts by omitting the belt wearing sensor 152. Since other configurations, operations, and effects are the same as those of the first embodiment described above, detailed description thereof will be omitted here.

10 Seat belt device 11, 11L, 11R Webbing 12, 12L, 12R Retractor 13 Shoulder anchor 14 Inner tongue 15, 15C, 15L, 15R Inner buckle 16 Mini tongue 17 Anchor buckle 18 Belt hanger 20 Vehicle seat 21 Seat back 22 Headrest 23 Cushion 24 Seating sensor 100, 200 Pretensioner controller 101 Control unit 102 Current meter 103 Collision detection sensor 110, 110L, 110R Pretensioner 141 Tongue plate 142 Tip 143 Through hole 151 Non-contact sensor 152 Belt wearing sensor 153 Wire harness 154, 155 connector 158 release button 159 opening

Claims (7)

A pretensioner control device that controls a pretensioner that is provided on a retractor that winds up a webbing that can be detached from the vehicle seat from the other end and that increases the tension acting on the webbing.
A first sensor that detects whether or not the inner tongue slidable on the webbing is inserted into the inner buckle provided on the vehicle seat, and
A second sensor that detects or predicts a collision of a vehicle equipped with the pretensioner control device, and
A seating sensor that detects whether or not an occupant is seated on the vehicle seat, and
When the second sensor detects or predicts the collision of the vehicle, the seating sensor detects the seating of the occupant, and the first sensor detects the insertion of the inner tongue into the inner buckle. If this is the case, the control unit that activates the pretensioner and does not activate the pretensioner unless the first sensor detects the attachment of the inner tongue to the inner buckle.
Pretensioner control device equipped with. A pretensioner control device that controls a pretensioner that is provided on a retractor that winds up a webbing that can be detached from the vehicle seat from the other end and that increases the tension acting on the webbing.
Detects whether or not the inner tongue slidable on the webbing is inserted into the inner buckle provided on the vehicle seat, or whether or not one of the ends is held at some point. The first sensor to do
A second sensor that detects or predicts a collision of a vehicle equipped with the pretensioner control device, and
When the second sensor detects or predicts a collision of the vehicle, the first sensor indicates that the inner tongue is attached to the inner buckle or that one end of the inner tongue is held at any position. If it is not detected, the control unit that does not activate the pretensioner and
Pretensioner control device equipped with. A current having a first current value other than zero current flows through the first sensor when the inner tongue is not inserted into the inner buckle, and the inner tongue is inserted into the inner buckle. A current with a second current value other than the zero current and different from the first current value flows,
The pretensioner control device according to claim 1 or 2 , wherein the control unit executes control to issue an alarm to the occupant of the vehicle when the current value of the current input from the first sensor is zero current. .. The pretensioner control device according to any one of claims 1 to 3 , wherein the first sensor is a non-contact sensor. The pretensioner control device according to any one of claims 1 to 3, wherein the current flowing through the first sensor is input to the control unit via a predetermined current meter. A pretensioner control method that controls a pretensioner that is provided on a retractor that winds up a webbing that can be detached from the vehicle seat from the other end and that increases the tension acting on the webbing.
It is detected whether or not the inner tongue slidably provided on the webbing is inserted into the inner buckle provided on the vehicle seat.
Detects or predicts collisions of vehicles equipped with a pretensioner control device,
Detecting whether or not an occupant is seated on the vehicle seat,
Upon detecting or predicts a collision of the vehicle, it is detected that an occupant on the vehicle seat is seated still long as is and inserted is detected to the inner buckle of the inner tongue, the If the pretensioner is activated and the attachment of the inner tongue to the inner buckle is not detected, the pretensioner is not activated.
Flop Ritenshona control method. A pretensioner control method that controls a pretensioner that is provided on a retractor that winds up a webbing that can be detached from the vehicle seat from the other end and that increases the tension acting on the webbing.
Detects whether or not the inner tongue slidable on the webbing is inserted into the inner buckle provided on the vehicle seat, or whether or not one of the ends is held at some point. ,
Detects or predicts collisions of vehicles equipped with a pretensioner control device,
When the collision of the vehicle is detected or predicted, if it is not detected that the inner tongue is attached to the inner buckle or that one end of the inner tongue is held at any position, the pretensioner is used. Do not operate
Pretensioner control method.

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