JP2018158675A - Occupant restraint device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an occupant restraint device which can secure proper restrain performance of a seat belt regardless of a rotation position of a seat.SOLUTION: An occupant restraint device includes: a rotation seat which is disposed so as to rotate relative to a vehicle longitudinal direction; a shoulder part, an anchor part, and a buckle part serving as multiple support parts which support a seat belt so that the seat belt can rotate relative to the rotation seat; first to third actuators 71 to 73 serving as multiple driving part which generate driving force for moving the shoulder part, the anchor part, and the buckle part; a rotation position sensor 81 serving as a rotation position detection part which detects a rotation position of the rotation seat with respect to the vehicle longitudinal direction; and an ECU 8 serving as a control part which controls at least one actuator of the first to third actuators 71 to 73 on the basis of the rotation position detected by the rotation position sensor 81.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an occupant restraint device.

  As conventional techniques, seat position detection means for detecting the position of the seat cushion in the front-rear direction, anchor position change means for changing the vertical position of the shoulder anchor relative to the vehicle body, and the seat cushion detected by the seat position detection means There is known an occupant restraint device including position change control means for controlling the operation of the anchor position change means in accordance with the position in the front-rear direction (see, for example, Patent Document 1).

  According to this occupant restraint device, the vertical position of the shoulder anchor can be changed to an appropriate position according to the longitudinal position of the seat cushion, so that the seat belt can be reliably wound when the seat belt is mounted, In addition, the tension of the seat belt can be made appropriate.

JP 2006-82703 A

  By the way, in the vehicle provided with the automatic driving system, it is proposed to mount a rotating seat capable of rotating the seat with respect to the front-rear direction of the vehicle for the purpose of improving the comfortability.

  Accordingly, it is an object of the present invention to provide an occupant restraint device that can ensure appropriate restraint performance of a seat belt regardless of the rotational position of the seat with respect to the vehicle longitudinal direction.

  [1] In order to achieve the above object, the present invention provides a rotating seat that is arranged to be rotatable with respect to the vehicle longitudinal direction, and is provided on the rotating seat so that a seat belt can be moved relative to the rotating seat. A plurality of supporting portions to be supported; a plurality of driving portions for moving the plurality of supporting portions to a predetermined position; a rotational position detecting portion for detecting a rotational position of the rotating seat in the vehicle longitudinal direction; and the rotational position detection And a control unit that controls at least one drive unit among the plurality of drive units based on the rotational position detected by the unit.

  [2] The control unit includes a vehicle information detection unit that detects a state of the vehicle, and controls at least one drive unit among the plurality of drive units based on the vehicle information detected by the vehicle information detection unit. The occupant restraint device described in [1] above may be used.

  [3] The occupant restraint according to [2], wherein the vehicle information is a vehicle speed, and the control unit controls at least one of the plurality of driving units when the vehicle speed is equal to or higher than a predetermined value. It may be a device.

  According to the present invention, it is possible to ensure the restraint performance of the seat belt regardless of the rotational position of the seat with respect to the vehicle longitudinal direction.

FIG. 1 is an overall view of a vehicle provided with a rotating seat according to an embodiment of the present invention. FIG. 2 is a perspective view illustrating a configuration of the occupant restraint device according to the embodiment. Fig.3 (a) is a side view of the passenger | crew restraint apparatus which concerns on embodiment, FIG.3 (b) is a top view. FIG. 4 is a block diagram illustrating an example of the configuration of the control unit according to the embodiment. FIG. 5 is a flowchart illustrating an example of the operation of the control unit according to the embodiment. FIG. 6A is a top view showing a state in which the rotating seat faces the front in order to explain an example of the operation of the occupant restraint device according to the embodiment, and FIG. It is the top view which showed the state which the rotation seat rotated in order to demonstrate an example of operation | movement of the said passenger | crew restraint apparatus. FIG. 7A is a diagram illustrating a state before the operation for explaining the operation of the buckle portion according to the modification, and FIG. 7B is a diagram for explaining the operation of the buckle portion according to the modification. It is the figure which showed the state after operation | movement. FIG. 8 is a correspondence table showing an example of the relationship between the movement direction of the shoulder portion, the anchor portion, and the buckle portion of the occupant restraint device according to the present embodiment and the effect according to the movement direction.

(Summary of embodiment)
The occupant restraint device according to the present embodiment includes a rotating seat disposed so as to be rotatable with respect to the vehicle longitudinal direction, and a plurality of seats provided on the rotating seat and supporting a seat belt so as to be relatively movable with respect to the rotating seat. , A plurality of drive units that move the plurality of support units to a predetermined position, a rotation position detection unit that detects a rotation position of the rotating seat with respect to the vehicle front-rear direction, and detection by the rotation position detection unit A control unit that controls at least one of the plurality of driving units based on the rotated position.

  This occupant restraint device changes the positions of the plurality of support portions relative to the rotating seat by controlling the plurality of drive units based on the rotation positions detected by the rotation position detection unit. Thereby, since the layout of the seat belt is appropriately changed, it is possible to ensure the restraint performance of the seat belt regardless of the rotational position of the rotating seat in the vehicle longitudinal direction.

[Embodiment]
(Outline of occupant restraint device 1)
An outline of an occupant restraint device according to the present embodiment will be described with reference to FIGS. 1 to 3. In the following description, the forward direction in the vehicle longitudinal direction is indicated by an arrow L, the inward direction in the vehicle width direction is indicated by an arrow W, the upper direction in the vehicle vertical direction is indicated by an arrow N, and the forward direction of the seat on which the occupant is seated is indicated by an arrow x, The left direction in the width direction of the sheet is indicated by an arrow y, and the upward direction of the sheet is indicated by an arrow z.

  FIG. 1 is an overall view of a vehicle provided with a rotating seat according to an embodiment of the present invention. FIG. 2 is a perspective view illustrating a configuration of the occupant restraint device according to the embodiment. Fig.3 (a) is a side view of the passenger | crew restraint apparatus which concerns on embodiment, FIG.3 (b) is a top view.

  The occupant restraint device 1 according to the present embodiment is a device for restraining an occupant with respect to a seat mounted on a vehicle, for example. As shown in FIG. 1, an occupant restraint device 1 according to an embodiment of the present invention is mounted on a driver seat and a passenger seat of a vehicle 9, but in the following description, the driver seat will be described as an example.

  As shown in FIGS. 2 and 3, the occupant restraint device 1 includes a rotating seat 2 disposed so as to be rotatable with respect to the vehicle longitudinal direction, a belt-like seat belt 3 that restrains the occupant P to the rotating seat 2, and rotation. A shoulder portion 4, an anchor portion 5, a buckle portion 6, a shoulder portion 4, an anchor portion 5, and a plurality of support portions that are provided on the seat 2 and support the seat belt 3 so as to be movable relative to the rotating seat 2. 1st thru | or 3rd actuators 71-73 as several drive parts which generate | occur | produce the drive force which moves the buckle part 6 with respect to the rotation sheet | seat 2 are provided. As the 1st thru | or 3rd actuators 71-73, the well-known drive means used conventionally may be sufficient, for example, a motor, a solenoid, etc. can be used.

  The rotating seat 2 is a so-called belt-in seat in which a retractor (not shown) that winds up the seat belt 3 is incorporated, and includes a seat cushion 21 that supports the heel of the occupant P and a seat back 22 that supports the back of the occupant P. Have. The rotational position of the rotating seat 2 with respect to the vehicle front-rear direction can be changed by a predetermined operation of the occupant P, and the driving method thereof may be manual or motor-driven.

  One end of the seat belt 3 is connected to the anchor portion 5. The other end of the seat belt 3 is connected to a retractor built in the seat back 22 via the shoulder portion 4.

  The shoulder portion 4 is provided on the outer side in the vehicle width direction (the direction opposite to the arrow W) on the upper end portion of the seat back 22. The shoulder portion 4 is provided with an outlet through which the seat belt 3 is pulled out, and the seat belt 3 is drawn out from the outlet toward the vehicle front (arrow L direction). The shoulder unit 4 is provided with a first actuator 71.

  The anchor portion 5 is provided on the side surface of the seat cushion 21 that faces the door 91 side (the side opposite to the arrow W) of the vehicle 9. The anchor unit 5 is provided with a second actuator 72.

  The buckle portion 6 is disposed on the side surface opposite to the seat cushion 21 where the anchor portion 5 is disposed. A tongue 31 disposed in the middle of the seat belt 3 is coupled to the buckle portion 6. The buckle unit 6 is provided with a third actuator 73.

  As shown in FIGS. 3A and 3B, the shoulder portion 4 is arranged to be movable along the sheet width direction (direction along the arrow y direction) by the driving force of the first actuator 71, and the anchor portion 5. Is arranged so as to be movable in the front-rear direction of the seat (direction along the arrow x direction) by the driving force of the second actuator 72, and the buckle portion 6 is moved in the front-rear direction of the seat (in the direction of arrow x) by the driving force of the third actuator 73. (Direction along).

  When the first to third actuators 71 to 73 are driven, the shoulder portion 4, the anchor portion 5 and the buckle portion 6 are moved to a predetermined position by the action of a meshing mechanism such as a rack and pinion, for example, and are locked at the moved position. Each is configured to be. The mechanism for moving the shoulder portion 4, the anchor portion 5 and the buckle portion 6 is not limited to the rack and pinion described above, and may be a speed reduction mechanism using a worm gear or the like, for example, a link arm or the like. A link mechanism using The shoulder portion 4 may be moved not only to the upper end side of the seat back 22 of the rotating seat 2 but also to the side surface side.

  As shown in FIG. 4, the occupant restraint device 1 according to the present embodiment includes an ECU 8 as a control unit that controls the first to third actuators 71 to 73. The ECU 8 is composed of a microcomputer composed of components such as a CPU that performs arithmetic processing on the acquired data according to a program stored in the memory 80, a RAM and ROM that are semiconductor memories, and a driver.

  The ECU 8 receives first to third actuators 71 to 73, a rotational position sensor 81 as a rotational position detection unit that detects the rotational position of the rotating seat 2 in the vehicle front-rear direction, and a signal corresponding to the traveling speed of the vehicle 9. A vehicle speed sensor 82 for output and a buckle switch 83 for outputting a signal corresponding to the coupling state of the buckle portion 6 and the tongue 31 are electrically connected.

  The ECU 8 controls driving of the first to third actuators 71 to 73 based on signals output from the rotational position sensor 81, the vehicle speed sensor 82, and the buckle switch 83. In the present embodiment, it is necessary for the ECU 8 to determine whether or not it is necessary to control the first to third actuators 71 to 73 based on signals output from the vehicle speed sensor 82 and the buckle switch 83. When it is determined that there is, the first to third actuators 71 to 73 are controlled based on the output signal of the rotational position sensor 81.

  The vehicle speed sensor 82 and the buckle switch 83 are examples of the vehicle information detection unit in the present invention, and are not limited to these. For example, an acceleration sensor that outputs a signal corresponding to the acceleration of the vehicle may be connected to the ECU 8 to control the first to third actuators 71 to 73 in accordance with the inertial force acting on the occupant P. Alternatively, a steering angle sensor or a yaw rate sensor may be connected to the ECU 8 to control the first to third actuators 71 to 73 according to the vector of the traveling direction of the vehicle 9.

  As the rotational position sensor 81, for example, a resolver, a hall element, or the like provided in a motor that rotationally drives the rotating sheet 2 may be used, or a rotary encoder may be used.

  The vehicle speed sensor 82 detects the rotational speed by magnetically detecting, for example, a mark of a magnetic body provided at a certain angle on the circumference of the wheel of the wheel, and based on this rotational speed, the speed of the vehicle 9 is detected. Output a signal.

  The buckle switch 83 outputs an on signal to the ECU 8 when the tongue 31 is coupled to the buckle unit 6, and outputs an off signal to the ECU 8 when the coupling is released.

  Next, the operation of the passenger restraint apparatus 1 according to the present embodiment will be described according to the flowchart shown in FIG. 5 with reference to FIGS.

  FIG. 5 is a flowchart illustrating an example of a control process executed by the ECU 8. The process shown in the flowchart shown in FIG. 5 is executed by the ECU 8 at regular intervals. FIG. 6A is a top view showing a state in which the rotating seat 2 faces the front in order to explain an example of the operation of the passenger restraint device 1, and FIG. 6B shows a state in which the rotating seat 2 is rotated. FIG. FIG. 7A is a diagram illustrating a state before the operation in order to explain the operation of the buckle unit 6 according to the modification, and FIG. 7B is a diagram illustrating a state after the operation. In FIGS. 6A and 6B, the steering wheel 90 is indicated by a two-dot chain line.

(Operation)
As shown in FIG. 5, when the tongue 31 is coupled to the buckle portion 6 (Step 10: Yes), the ECU 8 determines whether the vehicle speed of the vehicle 9 is greater than a predetermined value based on a signal output from the vehicle speed sensor 82. Is determined (Step 11). Here, the predetermined value is, for example, a relatively low speed value immediately after the vehicle travels, and the predetermined value is stored in the memory 80 in advance. The ECU 8 executes the determination process in Step 11 based on the predetermined value acquired from the memory 80 and the signal output from the vehicle speed sensor 82.

  If the vehicle speed of the vehicle 9 is greater than the predetermined value (Step 11: Yes), the rotational position of the rotating seat 2 is detected based on the output signal of the rotational position sensor 81 (Step 12), and the process proceeds to Step 13. On the other hand, when the vehicle speed of the vehicle 9 is equal to or less than the predetermined value (Step 11: No), the process proceeds to Step S10.

  In the process of Step 13, the ECU 8 determines whether or not the rotating seat 2 is rotated based on the signal from the rotational position sensor 81 (Step 13). When it is determined that the rotating sheet 2 is in a rotated state (Step 13: Yes), the ECU 8 causes the first to third actuators 71 to 73 to flow and operate. On the other hand, when it is determined that the rotating sheet 2 is not rotating (Step 13: No), the process proceeds to Step S10.

  Here, as shown in FIG. 6B, the state in which the rotating seat 2 is rotated coincides with the forward direction (arrow x direction) of the rotating seat 2 and the vehicle forward direction (arrow L direction). It means no state. On the other hand, the state in which the rotating seat 2 is not rotating coincides with the forward direction (arrow x direction) of the rotating seat 2 and the vehicle forward direction (arrow L direction) as shown in FIG. State.

  In the present embodiment, in Step 14, the ECU 8 controls the first to third actuators 71 to 73 so that the restraining force of the seat belt 3 on the occupant P increases. More specifically, as shown in FIG. 6B, the shoulder portion 4 and the anchor portion 5 move rearward (−x direction) in the seat front-rear direction, and the buckle portion 6 moves inward (−y) in the seat width direction. Control to move in the direction). Thereby, the restraining force of the seatbelt 3 with respect to the passenger | crew P increases.

  As described above, the occupant restraint device 1 according to the present embodiment can change the positions of the shoulder portion 4, the anchor portion 5, and the buckle portion 6 when the rotating seat 2 rotates. For example, as shown in FIG. 6B, when the vehicle 9 is traveling with the rotating seat 2 rotating, an inertial force in the arrow y direction is generated in the occupant P. In the present embodiment, even in such a state, the shoulder portion 4, the anchor portion 5 and the buckle portion 6 are moved so that the restraining force of the seat belt 3 is increased, and the layout of the seat belt 3 is appropriately changed. Is possible. Thereby, even if the rotating seat 2 is in a rotated state, it is possible to ensure appropriate restraint performance of the seat belt 3.

  The amount of movement of the shoulder portion 4, the anchor portion 5 and the buckle portion 6 is determined according to the tension of the seat belt 3 based on, for example, a motor torque provided on a retractor (not shown) that winds up the seat belt 3. Alternatively, it may be moved by a preset fixed amount. This also makes it possible to ensure the restraining performance of the seat belt 3.

  In the present embodiment, the ECU 8 controls all three actuators of the first to third actuators 71 to 73. However, the present invention is not limited to this, and at least one of the first to third actuators 71 to 73 is used. One actuator may be controlled.

  As a modification, the buckle portion 6 may be configured to be stretchable in the extending direction of the seat belt 3 as shown in FIG. More specifically, the buckle portion 6 according to the modified example is fixed to the seat cushion 21 and the coupling portion 61 to which the tongue 31 disposed in the middle of the seat belt 3 is coupled, as shown in FIG. The fixing portion 62 and the arm portion 63 disposed so as to be extendable and contractable between the coupling portion 61 and the fixing portion 62. The fixed portion 62 is provided with a third actuator 73.

  When the rotating sheet 2 is rotated, the ECU 8 controls the third actuator 73, the arm part 63 is wound up by the retractor built in the fixing part 62, and the coupling part 61 is drawn to the fixing part 62 side. Here, the pull-in amount of the coupling portion 61 is, for example, about 40 mm. Thus, the restraint force with respect to the waist | hip | lumbar part of the passenger | crew P increases because the connection part 61 of the buckle part 6 is drawn. The arm portion 63 may be formed of a rod that can be moved back and forth in the axial direction with respect to the fixed portion 62 by a third actuator 73 configured as a motor, a solenoid, or the like.

(Effect of embodiment)
Next, the effect of the passenger | crew restraint apparatus 1 which concerns on this Embodiment is demonstrated with reference to FIG. FIG. 8 is a correspondence table showing an example of the relationship between the movement direction of the shoulder portion 4, the anchor portion 5, and the buckle portion 6 of the occupant restraint device according to the present embodiment and the effect corresponding to the movement direction.

  As shown in FIG. 8, when the shoulder portion 4 moves in the direction of the arrow y, for example, the restraint on the shoulder portion of the occupant P during a side collision of the vehicle 9 can be improved.

  When the anchor portion 5 moves in the direction of the arrow x, the restraining force on the occupant P is reduced and the comfortability can be improved. On the other hand, when the anchor portion 5 moves in the direction of the arrow −x, it is possible to improve the restraining force on the lumbar portion of the occupant P at the time of a front collision on the front side of the vehicle or a side collision on the side of the vehicle.

  When the buckle part 6 moves in the arrow x direction, the restraining force on the occupant P is reduced, and the comfortability can be improved. On the other hand, when the buckle part 6 moves in the arrow -x direction, it is possible to prevent contact between the waist part of the occupant P and the buckle part 6 at the time of a front collision on the front side of the vehicle or a rear collision on the rear side of the vehicle.

  Moreover, if the buckle part 6 which concerns on a modification is extended, the restraining force with respect to the passenger | crew P will be reduced and the comfortability can be improved. On the other hand, when the buckle portion 6 according to the modified example is pulled in, it is possible to prevent contact between the waist portion of the occupant P and the buckle portion 6 at the time of a front collision on the front side of the vehicle or a rear collision on the rear side of the vehicle (FIG. 7 ( b)).

  As described above, the occupant restraint device 1 can obtain effects obtained by combining the above-described effects by appropriately changing the positions of the shoulder portion 4, the anchor portion 5, and the buckle portion 6. For example, when the shoulder portion 4 is moved in the y direction and the buckle portion 6 is moved in the −x direction, the restraining force of the shoulder portion and the waist portion of the occupant P can be improved.

  As a modification, the shoulder portion 4, the anchor portion 5, and the buckle portion 6 may be moved according to the rotational position of the rotating sheet 2. For example, when the direction of the rotating seat 2 is directed toward the rear side of the vehicle (opposite to the arrow L), the shoulder portion 4 and the anchor portion 5 are arranged so as to reduce the restraining force of the seat belt 3 with priority on the comfort. And the buckle portion 6 is moved, and when the direction of the rotating seat 2 is directed inward in the vehicle width direction (arrow W direction), the restraining force of the seat belt 3 is given priority to safety. You may make it move the shoulder part 4, the anchor part 5, and the buckle part 6 so that it may increase.

  As a modified example, two modes, a comfort mode in which the restraining force of the seat belt 3 is reduced and a safety mode in which the restraining force of the seat belt 3 is increased, are switched by the operation of the passenger P. You may be made to do.

  More specifically, the ECU 8 determines whether the selected mode is the comfort mode or the safety mode, and if it is determined that the mode is the comfort mode, the ECU 8 detects that the shoulder portion 4, the anchor portion 5, and the buckle portion 6 are seats. The first to third actuators 71 to 73 are controlled so as to reduce the binding force of the belt 3. On the other hand, when it is determined that the safety mode is selected, the shoulder portion 4, the anchor portion 5, and the buckle portion 6 control the first to third actuators 71 to 73 so that the restraining force of the seat belt 3 is increased. You can do it. Also by this, appropriate restraint performance of the seat belt 3 can be ensured.

  As described above, the occupant restraint device 1 according to the present embodiment controls the first to third actuators 71 to 73 based on the rotational position of the rotating seat 2 detected by the rotational position sensor 81, thereby The positions of the part 4, the anchor part 5 and the buckle part 6 can be changed as appropriate. As a result, even when the rotating seat 2 is rotated with respect to the vehicle front-rear direction, appropriate restraint performance of the seat belt 3 can be ensured.

  Further, since the occupant restraint device 1 controls the first to third actuators 71 to 73 when the vehicle speed is equal to or higher than a predetermined value, the shoulder portion 4, the anchor portion 5, and the buckle portion 6 are moved after the vehicle 9 starts. Can be moved. That is, since the passenger P is not made aware of fluctuations in the restraining force of the seat belt 3 after the vehicle 9 is started, the passenger P is not bothered by the layout change of the seat belt 3.

  In the above embodiment, the case where the occupant restraint device 1 is a three-point seat belt provided with three support portions for supporting the seat belt 3 with respect to the rotating seat 2 has been described as an example. The present invention can be applied even in the case of a four-point seat belt.

  Furthermore, in the above embodiment, the rotating seat 2 of the driver's seat of the vehicle 9 has been described as an example. However, the present invention is not limited to this, and the passenger restraint device 1 according to the present invention may be applied to a passenger seat or a rear seat.

  As mentioned above, although some embodiment and modification of this invention were demonstrated, these embodiment and modification are only examples, and do not limit the invention based on a claim. These novel embodiments and modifications can be implemented in various other forms, and various omissions, replacements, changes, and the like can be made without departing from the scope of the present invention. In addition, not all combinations of features described in these embodiments and modifications are necessarily essential to the means for solving the problems of the invention. Further, these embodiments and modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Passenger restraint device, 2 ... Rotating seat, 3 ... Seat belt, 4 ... Shoulder part, 5 ... Anchor part, 6 ... Buckle part, 71 ... 1st actuator, 72 ... 2nd actuator, 73 ... 3rd actuator, 81 ... rotational position sensor, 82 ... vehicle speed sensor, 83 ... buckle switch, 9 ... vehicle

Claims (3)

A rotating seat arranged to be rotatable relative to the vehicle longitudinal direction;
A plurality of support portions provided on the rotating seat and supporting a seat belt so as to be movable relative to the rotating seat;
A plurality of drive units for moving the plurality of support units to a predetermined position;
A rotational position detector for detecting a rotational position of the rotational seat relative to the vehicle longitudinal direction;
A control unit that controls at least one drive unit among the plurality of drive units based on the rotation position detected by the rotation position detection unit,
Crew restraint device. The control unit includes a vehicle information detection unit that detects a state of the vehicle, and controls at least one drive unit among the plurality of drive units based on the vehicle information detected by the vehicle information detection unit.
The occupant restraint device according to claim 1. The vehicle information is a vehicle speed,
The control unit controls at least one drive unit among the plurality of drive units when the vehicle speed is equal to or higher than a predetermined value.
The occupant restraint device according to claim 2.

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