JP5069760B2 - Seat belt device - Google Patents

Description

  The present invention relates to a seat belt device for a vehicle that restrains an occupant seated on a seat by webbing.

  In recent years, as a seat belt device, a device that draws and unwinds a webbing by a motor has been developed. For example, this seat belt device increases the restraint of the occupant by pulling the webbing greatly by a motor in an emergency, gives a warning to the occupant by repeatedly pulling the webbing lightly with the motor, or loosens the webbing by pulling the motor. It is supposed to take.

Conventionally, as this type of seat belt device, an emergency occupant restraint mode in which webbing is pulled in by a motor in an emergency, a webbing adjustment mode (confort mote) in which the tension of the webbing is adjusted by a motor in cases other than an emergency, etc. There is also known one in which the user can set the strength and time of webbing pull-in, the time, the presence / absence of operation, and the like for each mode (see, for example, Patent Document 1).
The seat belt device described in Patent Document 1 includes a mechanism that allows a user to experience the pulling tension of a webbing set by a user in a pseudo manner, thereby enabling the user to make an appropriate setting.

JP 2006-315683 A

  In this conventional seat belt device, the user can simulate the setting value for each mode, so that the setting itself can be selected without any sense of incongruity, but the setting operation is performed while checking the monitor (display means). When there is a communication error between the input operation side that performs the operation and the controller for motor control, an appropriate setting change cannot be performed only by displaying an error on the monitor.

  In view of this, the present invention intends to provide a seat belt device capable of performing appropriate valid / invalid setting for each operation mode of the webbing control means even when there is a communication abnormality between the webbing control means and the input operation side. Is.

The invention according to claim 1, which solves the above problem, includes a webbing operation mechanism (for example, the motor 10 in the embodiment) that operates winding and unwinding of the webbing (for example, the webbing 5 in the embodiment), and the webbing operation. Webbing control means for controlling the mechanism (for example, the controller 21 in the embodiment), and the webbing control means restrains the occupant in an emergency or warns the occupant in an emergency occupant restraint mode and other than emergency A webbing adjustment mode for adjusting the amount of webbing unwinding, and the emergency occupant restraint mode and the webbing adjustment mode are individually enabled / disabled by input operation means (for example, the switch unit 33 in the embodiment). A seatbelt device that can be set and changed by the user. Display means for displaying constant operation information (for example, the liquid crystal monitor 35 in the embodiment) and valid / invalid setting operation information input by the input operation means are transmitted to the webbing control means, and from the webbing control means Display control means (for example, the controller 36 in the embodiment) for receiving confirmation information on the setting of validity / invalidity of the mode and displaying the content of the confirmation information on the display means, and the webbing control means When the webbing adjustment mode is set to be valid / invalid, if there is a communication abnormality in the confirmation information to the display control unit, the setting is made valid / invalid according to the operation of the input operation unit, and When the emergency occupant restraint mode was set to valid / invalid, there was a communication error in the confirmation information to the display control means. The case, characterized in that the operation in regard not enable setting of the input operation means.
In this case, in the webbing adjustment mode, the actual operation is performed at times other than in an emergency, and even if the webbing control means is set in a state different from the user's intention to perform the setting operation, there is a problem in restraining the passenger. Therefore, the setting of valid / invalid of the webbing control means is switched so that the user's intention to perform the setting operation is reflected as much as possible even if there is a communication error in the confirmation information. In the emergency occupant restraint mode, the actual operation is in an emergency, so if there is a communication error in the confirmation information, the control by the webbing control means is enabled to enable occupant restraint in the emergency. Make warnings more reliable.

According to a second aspect of the present invention, in the seatbelt device according to the first aspect, the display control means cannot obtain confirmation information from the webbing control means during a valid / invalid setting operation by the input operation means. In this case, the current display contents related to the validity / invalidity of the display means are maintained regardless of the operation of the input operation means.
In this case, the display on the display unit is not switched despite the setting switching operation of the input operation unit being performed.

  According to the first aspect of the present invention, when the setting switching operation of the webbing control unit is performed from the input operation unit through the display control unit, there is a communication abnormality in the confirmation information from the webbing control unit to the display control unit. In the webbing adjustment mode that does not operate in an emergency, the webbing control means is switched between valid / invalid to match the user's intention to change the operation. In the emergency passenger restraint mode that operates in an emergency, the webbing control means always uses In order to enable the control and enable the passenger restraint and the warning to be surely performed, it is possible to appropriately set validity / invalidity for each operation mode of the webbing control means.

  According to the second aspect of the present invention, when there is a communication abnormality in the confirmation information to the display control means when the setting switching operation of the webbing control means is performed from the input operation means through the display control means, the display is displayed. Since the display relating to the validity / invalidity of the means is not changed as it is, it is possible to allow the occupant to recognize that there is a communication abnormality and to prompt the user to take an early countermeasure against the failure.

1 is a schematic configuration diagram of a seat belt device according to an embodiment of the present invention. 1 is a schematic configuration diagram of a seat belt device according to an embodiment of the present invention. It is a correspondence table which shows the setting state at the time of communication abnormality of the seatbelt apparatus of one Embodiment of this invention. It is a correspondence table which shows the setting state at the time of communication abnormality of the seatbelt apparatus of one Embodiment of this invention. It is a flowchart which shows control of the seatbelt apparatus of one Embodiment of this invention.

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

  The webbing 5 is wound around the retractor 4 in the initial state, and the occupant 3 pulls it out by hand to fix the tongue plate 8 to the buckle 9, thereby restraining the chest and abdomen mainly of the occupant 3 with respect to the seat 2. To do. Further, the seat belt device 1 is configured to automatically move the webbing 5 by the electric motor 10 (webbing operation mechanism) when the behavior of the vehicle becomes unstable or when the webbing 5 is slack during normal driving. Perform the take-up operation. The motor 10 is controlled by the controller 21. In this embodiment, the controller 21 is a webbing control means.

Moreover, in FIG. 1, 30 is a steering wheel provided in a driver's seat, 31 is an instrument panel arrange | positioned ahead of a driver's seat.
In addition to the horn 32, various switches are installed on the steering wheel 30, and one of the switch units 33 is a customization setting switch unit for setting various customizations by the user. In this embodiment, the switch unit 33 is an input operation means for the user to customize the seat belt device 1. This customization setting will be described in detail later.
On the other hand, the instrument panel 31 is provided with a meter display unit 34 including a speedometer, a tachometer, and the like, and a liquid crystal monitor 35 capable of switching and displaying various information below the meter display unit 34. . In this embodiment, the liquid crystal monitor 35 is a display means for displaying user setting operation information when the seat belt apparatus 1 is customized. The switch unit 33 and the liquid crystal monitor 35 are connected to a controller 36 that is a display control means, and the controller 36 causes the liquid crystal monitor 35 to display setting operation information by the switch unit 33.

FIG. 2 is a schematic configuration diagram of the seat belt device 1 for explaining the functions of the retractor 4 and the controllers 21 and 36.
As shown in FIG. 2, the retractor 4 has a webbing 5 wound around a belt reel 12 rotatably supported by a casing (not shown), and a shaft of the belt reel 12 projects from one end side of the casing. . The belt reel 12 is connected to the rotating shaft 10 a of the motor 10 via a power transmission mechanism 13 so as to be interlocked. The power transmission mechanism 13 decelerates the rotation of the motor 10 and transmits it to the belt reel 12. The retractor 4 is provided with a winding spring (not shown) that urges the belt reel 12 in the webbing winding direction. When the belt reel 12 and the motor 10 are separated by the clutch 20, the tension by the winding spring is increased. It acts on the webbing 5. The clutch 20 is turned on when the motor 10 is rotating forward, and is turned off when the motor 10 is rotated backward.

Further, the retractor 4 is provided with a rotation sensor 11 (position detection means) for detecting the rotation position of the belt reel 12. The rotation sensor 11 includes, for example, a magnetic disk in which different magnetic poles are alternately magnetized along the circumferential direction and rotates integrally with the belt reel 12, and a pair disposed in the vicinity of the outer peripheral edge of the magnetic disk. And a sensor circuit for processing a detection signal of the Hall element, and a pulse signal processed by the sensor circuit is output to the controller 21.
In this case, the pulse signal input from the sensor circuit to the controller 21 according to the rotation of the belt reel 12 is used to detect the rotation amount, rotation speed, rotation direction, and the like of the belt reel 12. That is, the controller 21 detects the rotation amount of the belt reel 12 (the winding amount and the feeding amount of the webbing 5) by counting the pulse signal, and calculates the change rate (frequency) of the pulse signal to calculate the belt reel. 12 is obtained, and the rotation direction of the belt reel 12 is detected by comparing the rising edges of the waveforms of both pulse signals.

  Incidentally, on the input side of the controller 21, in addition to the rotation sensor 11, as shown in FIG. 2, a longitudinal acceleration sensor 40 for detecting the longitudinal acceleration of the vehicle, and a lateral acceleration sensor for detecting the lateral acceleration of the vehicle. 41, a yaw rate sensor 42 for detecting angular acceleration in the yaw direction of the vehicle is connected. In addition, the controller 21 transmits and receives information (signals) to and from the controller 36 that controls display on the liquid crystal monitor 35 through an in-vehicle network (CAN).

The controller 21 determines an emergency state based on input signals from the longitudinal acceleration sensor 40, the lateral acceleration sensor 41, the yaw rate sensor 42, etc., and greatly pulls the webbing 5 when it is determined to be an emergency state, or The emergency occupant restraint mode in which the motor 10 is energized and controlled so as to be pulled in intermittently, and the motor 10 is adjusted so that the winding amount of the webbing 5 is adjusted at times other than the emergency for removing slack of the webbing 5. And a webbing adjustment mode (comfort mode) for energization control.
The emergency occupant restraint mode and webbing adjustment mode can be individually set to enable / disable control by the switch unit 33 on the steering wheel 30. The valid / invalid setting of each mode is performed while confirming with the liquid crystal monitor 35 on the instrument panel 31. When the setting change is completed, the result is basically displayed on the liquid crystal monitor 35. It is like that.

  Specifically, the menu screen is displayed on the liquid crystal monitor 35 by the initial operation of the switch unit 33, the setting change of the emergency passenger restraint mode or the webbing adjustment mode is selected from the menu screen, and the setting change screen is further displayed. Select the mode ON / OFF (valid / invalid). At this time, the state of the mode that has already been set is highlighted, and when switching ON / OFF, the side that is not highlighted is selected by operating the switch unit 33. Then, when the ON / OFF switching of each mode is performed by the switch unit 33 while confirming with the liquid crystal monitor 35, the setting operation information (ON / OFF switching information) input to the display controller 36 at this time is obtained. It is transmitted to the controller 21 for webbing control through the in-vehicle network. At this time, the controller 21 actually switches the ON / OFF setting of each mode based on the setting operation information. Thus, when the setting of the controller 21 for webbing control is switched, the confirmation information (actual setting state information) transmitted from the controller 21 to the display controller 36 is switched. The display controller 36 receives the confirmation information and displays the actual setting state on the liquid crystal monitor 35. This allows the user to confirm that the mode ON / OFF setting has been changed.

By the way, there is a possibility that a communication abnormality may occur between the display controller 36 and the webbing control controller 21 due to some cause. In this case, if the ON / OFF operation of each mode is switched while confirming with the liquid crystal monitor 35, the setting operation information transmitted from the display controller 36 and the confirmation information from the webbing control controller 21 are inconsistent. For example, “Setting failed” is displayed on the screen 35.
In this case, if the transmission side communication abnormality from the display controller 36 to the webbing control controller 21 is abnormal, ON / OFF switching of the webbing control controller 21 is not performed. Further, at this time, a communication abnormality can be recognized on the user side because the ON / OFF display on the liquid crystal monitor 25 is not switched.

  Further, the display controller 36 is provided with an abnormality determination means 43 for determining a communication abnormality on the receiving side (communication abnormality of confirmation information from the controller 21 for webbing control). Is provided with an abnormality setting means 44 for setting ON / OFF of each mode when the abnormality determination means 43 determines that an abnormality has occurred. The setting by the abnormal time setting means 44 is different between the webbing adjustment mode and the emergency occupant restraint mode, and is set as shown in the correspondence tables of FIGS. In the figure, E-PT means the motor 10 controlled by the controller 21 for webbing control.

  That is, in the webbing adjustment mode, control ON / OFF by the controller 21 for webbing control is set so as to match the setting operation information (setting operation of the switch unit 33) of the display controller 36, and emergency In the hourly passenger restraint mode, the control by the webbing control controller 21 is set to ON regardless of the setting operation information of the display controller 36 (setting operation of the switch unit 33).

  Further, when the confirmation controller 36 does not obtain confirmation information from the webbing control controller 21 and the abnormality determination unit 43 determines that there is a communication abnormality on the reception side, the display controller 36 performs the above-described operation on the controller 21 side for webbing control. Even if the setting is made at the time of abnormality, the current ON / OFF display content (before the setting change) of the liquid crystal monitor 25 is maintained regardless of the setting result.

Hereinafter, the control of the confirmation information of the seat belt device 1 when communication is abnormal will be described with reference to the flowchart of FIG.
First, in step S101, it is determined whether or not a customization operation has been performed on the display controller 36 side. If yes, the process proceeds to step S102, and if no, the process returns. In step S102, it is determined whether or not the setting operation information input to the display controller 36 matches the confirmation information received from the webbing control controller 21, and if yes, step S103 is determined. If No, go to Step S104.
When the process proceeds to step S103, since there is no communication abnormality, a normal ON / OFF switching process is performed.
In step S104, it is determined whether or not the current customization setting mode is the emergency occupant restraint mode. If yes, the control by the webbing control controller 21 is set to ON, In the case of No, since it is the webbing adjustment mode, ON / OFF of the control of the controller 21 for webbing control is set based on the setting operation information of the controller 36 for display.

  As described above, in the seat belt device 1, when the setting switching operation of the controller 21 for webbing control is performed through the display controller 36 while confirming the operation content on the screen of the liquid crystal monitor 35, In the webbing adjustment mode, when there is a communication abnormality in the confirmation information from the controller 21 for webbing control with respect to the controller 36, the webbing control mode is reflected based on the operation of the switch unit 33 so as to reflect the user's intention to operate. In the emergency occupant restraint mode, the controller 21 for webbing control is always set to ON regardless of the operation of the switch unit 33. Therefore, the controller 21 is turned on for each operation mode. / OFF can be set appropriately.

  In other words, in the webbing adjustment mode that operates at times other than emergency, even if it is set against the occupant's intention to operate, there will be no problem with occupant restraint. By setting ON / OFF of the control by the controller 21 with priority given to the user's setting operation intention, an operation result according to the user's setting intention can be obtained in many cases. In the emergency occupant restraint mode that operates in an emergency, when the communication of confirmation information is abnormal, the control by the controller 21 is set to ON regardless of the user's intention of setting operation, thereby ensuring occupant restraint and warning in an emergency. Can be done.

  Further, in this seat belt device 1, when the setting switching operation of the webbing control controller 21 is performed through the display controller 36, confirmation information from the webbing control controller 21 to the display controller 36 is displayed. When there is a communication abnormality, even if the setting of the controller 21 for webbing control is switched by the abnormality setting unit 44, the ON / OFF display on the liquid crystal monitor 35 does not change as it is, so that the communication abnormality is The crew can be made aware of what happened. Therefore, an early countermeasure by the user can be promoted by this.

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

DESCRIPTION OF SYMBOLS 1 ... Sievert device 5 ... Webbing 10 ... Motor (webbing operation mechanism)
21 ... Controller (webbing control means)
33 ... Switch unit (input operation means)
35 ... Liquid crystal monitor (display means)
36 ... Controller (display control means)

Claims (2)

A webbing operation mechanism that operates winding and unwinding of the webbing;
Webbing control means for controlling the webbing operation mechanism;
With
The webbing control means has an emergency occupant restraint mode that restrains the occupant in an emergency or warns the occupant, and a webbing adjustment mode that adjusts the amount of webbing unwinding when not in an emergency,
The emergency occupant restraint mode and the webbing adjustment mode are individually enabled / disabled by the input operation means, and the seat belt device can be changed.
Display means for displaying user setting operation information;
The valid / invalid setting operation information input by the input operation means is transmitted to the webbing control means, and the confirmation information of the valid / invalid setting of the mode is received from the webbing control means, and the confirmation information Display control means for displaying the contents on the display means,
When the webbing adjustment mode is set to be valid / invalid in the webbing adjustment mode, if there is a communication abnormality of the confirmation information to the display control unit, the webbing control unit is set to valid / invalid according to the operation of the input operation unit And
When the emergency occupant restraint mode is set to be valid / invalid, if there is a communication abnormality of the confirmation information to the display control means, the valid setting is made regardless of the operation of the input operation means. Seat belt device.   When the confirmation information is not obtained from the webbing control means during the valid / invalid setting operation by the input operation means, the display control means is configured to enable / disable the display means regardless of the operation of the input operation means. 2. The seat belt device according to claim 1, wherein the current display content relating to invalidity is maintained.

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