JP2019196080A - Vehicular seat - Google Patents

Abstract

To provide a vehicular seat that can avoid the seat from being brought into contact with an unexpected object when the seat is transferred from an automatic operation posture into a manual operation posture.SOLUTION: A vehicular seat according to one embodiment is installed in a vehicle that can be switched between an automatic operation state and a manual operation state. The vehicular seat comprises: a seat main body; a slide device that displaces the seat main body in a longitudinal direction; a seat lifter device that displaces the seat main body in a vertical direction; and a control part that transfers the seat main body into an automatic operation posture or a manual operation posture accompanying switching of operation states of the vehicle. The control part, when transferring the seat main body from the automatic operation posture into the manual operation posture, causes the slide device to displace the seat main body to a position ahead of a position where a collision of the seat main body with an object arranged below the seat main body in the automatic operation posture can be avoided, and then causes the seat lifter device to displace the seat main body downward.SELECTED DRAWING: Figure 3

Description

  The present disclosure relates to a vehicle seat.

  In a vehicle that can be switched between a manual driving state in which the driver manually drives the vehicle and an automatic driving state in which the vehicle automatically drives, the posture between the manual driving posture and the automatic driving posture according to the driving state A vehicle seat that adjusts the angle is known (see Patent Document 1).

JP 2017-136898 A

  In general, in the automatic driving posture, in order to relax the driver, the seat cushion is moved rearward and upward than during manual driving, and the seat back is further reclining back. Therefore, when the automatic operation state is switched to the manual operation state, the seat cushion is controlled to move forward and downward.

  However, if an object inserted from the rear is placed between the seat cushion of the driver's seat and the vehicle floor in the automatic driving posture, the seat cushion becomes an object when the seat cushion moves to the manual driving posture. There is a risk of contact.

  One aspect of the present disclosure is to provide a vehicle seat that can avoid unexpected contact with an object when shifting from an automatic driving posture to a manual driving posture.

  One aspect of the present disclosure is a vehicle seat (1) installed in a vehicle capable of switching between an automatic driving state and a manual driving state. The vehicle seat (1) includes a seat body (2), a slide device (3) that displaces the seat body (2) in the front-rear direction, and a seat lifter device (4) that displaces the seat body (2) in the vertical direction. And a controller (11) for shifting the seat body (2) to the automatic driving posture or the manual driving posture in accordance with the switching of the driving state of the vehicle.

  Further, when the control unit (11) shifts the seat main body (2) from the automatic driving posture to the manual driving posture, the object and the seat main body (2) disposed below the seat main body (2) in the automatic driving posture. After the seat body (2) is displaced by the slide device (3) ahead of the position where the collision with the seat is avoided, the seat body (2) is displaced downward by the seat lifter device (4).

  According to such a configuration, even if an object is arranged below the seat body (2) in the automatic driving posture, the seat body (2) is lowered after moving forward to a position where it does not come into contact with the object. Unexpected contact between the main body (2) and the object can be avoided.

  In one aspect of the present disclosure, the control unit (11) stores the manual driving posture immediately before the transition to the automatic driving posture, and also shifts the seat body (2) from the automatic driving posture to the stored manual driving posture. Good. According to such a configuration, it is possible to automatically return to the manual driving posture set by the driver himself.

  Note that the reference numerals in the parentheses above are examples showing the correspondence with the specific configurations described in the embodiments described later, and the present disclosure is limited to the specific configurations shown in the reference numerals in the parentheses. It is not something.

FIG. 1 is a schematic perspective view showing a vehicle seat in the embodiment. FIG. 2 is a configuration diagram illustrating a control unit and an operation unit of the vehicle seat in FIG. 1. FIG. 3 is a schematic diagram for explaining the trajectory of the seat body. FIG. 4 is a flowchart schematically showing processing executed by the control unit for the vehicle seat shown in FIG.

Hereinafter, embodiments to which the present disclosure is applied will be described with reference to the drawings.
[1. First Embodiment]
[1-1. Constitution]
A vehicle seat 1 shown in FIG. 1 is mounted on a vehicle capable of switching between an automatic driving state and a manual driving state.

  The vehicle seat 1 includes a seat body 2, a slide device 3, a seat lifter device 4, a tilt device 5, a reclining device 6, a control unit 11 (see FIG. 2), and an operation unit 12 (see FIG. 2). Is provided.

  The vehicle seat 1 of the present embodiment is used as a seat for a driver's seat of a vehicle. In addition, the direction in the following description and each figure means the direction in the state which assembled | attached the vehicle seat 1 to the vehicle. In the present embodiment, the seat width direction matches the left-right direction of the vehicle, and the front of the seat matches the front of the vehicle.

<Sheet body>
The seat body 2 includes a seat cushion 2A, a seat back 2B, a cushion frame 2C, and a back frame 2D.

The seat cushion 2A is a part for supporting a seated person's buttocks and the like. The cushion frame 2C constitutes the skeleton of the seat cushion 2A.
The seat back 2B is a part for supporting the back of the seated person, and can swing in the front-rear direction of the seat with respect to the seat cushion 2A. The back frame 2D constitutes the skeleton of the seat back 2B.

<Slide device>
The slide device 3 is a device that displaces the seat body 2 in the front-rear direction. As shown in FIG. 1, the slide device 3 slides the first rail portion 31 and the second rail portion 32 that are spaced apart in the seat width direction, and the first rail portion 31 and the second rail portion 32. 1 drive unit 33.

  The first rail portion 31 and the second rail portion 32 are fixed rails 31A and 32A attached to the vehicle body and the cushion frame 2C, and are movable in such a manner that they can slide in the seat longitudinal direction with respect to the fixed rails 31A and 32A Rails 31B and 32B. The movable rails 31B and 32B are attached to the cushion frame 2C via a seat lifter device 4 described later.

  The first drive unit 32 slides the movable rails 31B and 32B with respect to the fixed rails 31A and 32A in the first rail unit 31 and the second rail unit 32. In the present embodiment, the first drive unit 32 includes an actuator that uses electricity as power. However, the first drive unit 32 may use air as power.

<Sheet lifter device>
The sheet lifter device 4 is a device that displaces the sheet body 2 in the vertical direction. The seat lifter device 4 includes a first lifter link 41A, a second lifter link 41B, a third lifter link 41C, a fourth lifter link 41D, and four lifter links 41A that are spaced apart in the seat width direction and the seat front-rear direction. , 41B, 41C, 41D have a second drive part 42 that swings relative to the cushion frame 2C.

  The upper ends of the four lifter links 41A, 41B, 41C, and 41D are swingably attached to the cushion frame 2C. The lower ends of the first lifter link 41A and the second lifter link 41B are swingably attached to the movable rail 31B of the first rail portion 31, respectively. The lower ends of the third lifter link 41C and the fourth lifter link 41D are swingably attached to the movable rail 32B of the second rail portion 32, respectively. Note that the swing shafts at the upper and lower ends of the four lifter links 41A, 41B, 41C and 41D are parallel to the sheet width direction.

  The second drive unit 42 swings and displaces the four lifter links 41A, 41B, 41C, 41D back and forth with respect to the cushion frame 2C. Thereby, the cushion frame 2C is displaced in the vertical direction, and as a result, the seat body 2 is displaced in the vertical direction. In the present embodiment, the second drive unit 42 includes an actuator that uses electricity as power. However, the second drive unit 42 may use air as power.

<Tilt device>
The tilt device 5 is a device that displaces the front end portion of the seat cushion 2A in the vertical direction.

  The tilt device 5 includes a first tilt arm 51 and a second tilt arm 52 that are spaced apart in the sheet width direction, and a tilt panel (not shown) connected to the first tilt arm 51 and the second tilt arm 52. And a third drive unit 53 (see FIG. 2) that swings the first tilt arm 51 and the second tilt arm 52 relative to the cushion frame 2C.

  The rear end portions of the two first tilt arms 51 and the second tilt arm 52 are swingably attached to the cushion frame 2C. The front end portions of the two first tilt arms 51 and the second tilt arm 52 are each fixed to a tilt panel.

  The tilt panel is a panel that is disposed above the cushion frame 2C and supports the front end portion of the seat cushion 2A. The tilt panel is supported by the first tilt arm 51 and the second tilt arm 52.

  The third drive unit 53 swings and displaces the two first tilt arms 51 and the second tilt arm 52 up and down with respect to the cushion frame 2C. As a result, the portion of the seat cushion 2A supported by the tilt panel is displaced in the vertical direction. In the present embodiment, the third drive unit 53 includes an actuator that uses electricity as power. However, the third drive unit 53 may use air as power.

<Recliner>
The reclining device 6 is a device that swings the back frame 2D in the seat front-rear direction with respect to the cushion frame 2C.

  The reclining device 6 includes a first recliner 61 and a second recliner 62 that are spaced apart from each other in the seat width direction, and a fourth drive unit 63 that applies a swinging force to the first recliner 61 and the second recliner 62.

  The 1st recliner 61 and the 2nd recliner 62 are each arrange | positioned in the connection part of back frame 2D and cushion frame 2C, and transmit the rocking | fluctuation force with respect to cushion frame 2C to back frame 2D.

  The 4th drive part 63 gives the said rocking | fluctuation force to the 1st recliner 61 and the 2nd recliner 62 via the rod 63A. In the present embodiment, the fourth drive unit 63 includes an actuator that uses electricity as power. However, the fourth drive unit 63 may use air as power.

<Control unit>
The control unit 11 illustrated in FIG. 2 shifts the seat body 2 to the automatic driving posture or the manual driving posture in accordance with the switching of the driving state of the vehicle.

The control unit 11 is configured by a microcomputer including, for example, a microprocessor, a storage medium such as a RAM and a ROM, and an input / output unit.
The control unit 11 controls the posture of the seat body 2 by executing a program stored in advance. The control unit 11 is connected to an engine control unit (ECU) 20 mounted on the vehicle, and acquires the driving state of the vehicle from the engine control unit 20.

  When the vehicle is switched from the manual driving state to the automatic driving state, the control unit 11 stores the manual driving posture (that is, the current manual driving posture) immediately before shifting to the automatic driving posture as data. Thereafter, the control unit 11 drives the slide device 3, the seat lifter device 4, the tilt device 5, and the reclining device 6 to shift the seat body 2 to a preset automatic driving posture. In the automatic driving posture, the entire seat cushion 2A moves backward and upward relative to the manual driving posture, the front end portion of the seat cushion 2A is displaced upward, and the back frame 2D tilts backward.

  Further, when the vehicle is switched from the automatic driving state to the manual driving state, the control unit 11 displaces the seat body 2 by the slide device 3 ahead of a predetermined position, and then the seat body 2 by the seat lifter device 4. Is displaced downward. Thereby, the control unit 11 shifts the seat body 2 from the automatic driving posture to the manual driving posture stored as data in advance.

  Here, the “predetermined position” means that when the seat main body 2 in the automatic driving posture is displaced downward, a collision between an object disposed below the seat main body 2 in the automatic driving posture and the seat main body 2 can be avoided. Means position. The object is an object that is assumed to be inserted below the seat body 2 from the rear after the seat body 2 shifts to the automatic driving posture. The predetermined position is determined by the trajectory of the seat body 2 driven by the slide device 3 and the seat lifter device 4 and the assumed size of the object.

  As shown in FIG. 3, the control unit 11 is configured to slide the reference point locus O at the lower end and the rear end of the sheet main body 2 so as not to enter the avoidance area P1 where the object can exist as viewed from the sheet width direction. 3 and the sheet lifter device 4 are driven. The reference point of the seat body 2 is a moving region surrounded by the foremost position F, the rearmost position R, the uppermost position U, and the lowermost position D of the reference point that is displaced according to the posture of the seat body 2. Move within P0.

  The control unit 11 may drive the seat lifter device 4 in a state where the slide device 3 is stopped after driving the slide device 3 until the seat body 2 reaches the target position in the front-rear direction in the manual operation posture. In this case, the predetermined position is the foremost position Q1 of the avoidance region P1.

  Further, the control unit 11 may start driving the seat lifter device 4 while driving the slide device 3 before the seat body 2 reaches the target position in the front-rear direction in the manual driving posture. In this case, the predetermined position is a position Q2 behind the fixed distance L from the foremost end of the avoidance region P1. This fixed distance L is calculated based on the ratio of the forward speed by the slide device 3 and the descending speed by the seat lifter device 4.

  Further, the control unit 11 may drive the sheet lifter device 4 after the slide device 3 is stopped, and then drive the slide device 3 further. For example, the seat body 2 may be slid forward from the target position by driving the slide device 3 for the first time, and the seat body 2 may be slid rearward by the second drive of the slide device 3 and moved to the target position. . In this case, the predetermined position is the front end position Q1 of the avoidance region P1 as described above.

  The tilt device 5 and the reclining device 6 may be driven simultaneously with the slide device 3 or simultaneously with the seat lifter device 4. That is, the drive timing of the tilt device 5 and the reclining device 6 is not questioned.

<Operation unit>
The operation unit 12 is a switch for adjusting the posture of the seat body 2. Based on the input from the operation unit 12, the control unit 11 drives each driving device to change the posture of the seat body 2.

[1-2. processing]
Hereinafter, the process executed by the control unit 11 to shift the seat body 2 to the manual operation posture will be described with reference to the flowchart of FIG.

  In this process, the control unit 11 first drives the slide device 3 until the seat main body 2 reaches the target position in the front-rear direction (step S10). In step S10, as described above, the slide device 3 may be driven in a plurality of times.

  Next, the control unit 11 drives the tilt device 5 until the front end portion of the seat cushion 2A reaches the target position, and drives the reclining device 6 until the seat back 2B reaches the target position (step S20).

  Next, the control unit 11 determines whether the reference point (the lower end and the rear end point of the sheet body 2) of the sheet body 2 is before the predetermined position (step S30). When the reference point is before the predetermined position (S30: YES), the control unit 11 drives the sheet lifter device 4 until the sheet body 2 reaches the target position in the vertical direction (step S40). In addition, this step S40 may be performed while the slide apparatus 3 is driving.

  When the reference point is not before the predetermined position (S30: NO), the control unit 11 repeats the determination at step S30, and the driving of the slide device 3 causes the reference point to be before the predetermined value. wait.

  Note that step S20 may be executed simultaneously with step S10 or before step S10, or after step S30 (that is, after the reference point is before the predetermined position). Good.

[1-3. effect]
According to the embodiment detailed above, the following effects can be obtained.
(1a) Even if an object is arranged below the seat body 2 in the automatic driving posture, the seat body 2 descends after moving forward to a position where it does not come into contact with the object. Contact can be avoided.

  (1b) At the time of switching from the automatic driving state to the manual driving state, the seat main body 2 is shifted to the manual driving posture immediately before shifting to the automatic driving posture, so that the driver automatically returns to the manual driving posture set by the driver. be able to.

[2. Other Embodiments]
As mentioned above, although embodiment of this indication was described, it cannot be overemphasized that this indication can take various forms, without being limited to the above-mentioned embodiment.

  (2a) In the vehicle seat 1 of the above embodiment, the control unit 11 does not necessarily have to shift the seat body 2 from the automatic driving posture to the stored manual driving posture. That is, the control unit 11 does not necessarily have to store the manual driving posture immediately before shifting to the automatic driving posture.

  (2b) The functions of one component in the above embodiment may be distributed as a plurality of components, or the functions of a plurality of components may be integrated into one component. Moreover, you may abbreviate | omit a part of structure of the said embodiment. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects included in the technical idea specified from the wording described in the claims are embodiments of the present disclosure.

DESCRIPTION OF SYMBOLS 1 ... Vehicle seat, 2 ... Seat main body, 2A ... Seat cushion, 2B ... Seat back,
2C ... Cushion frame, 2D ... Back frame, 3 ... Slide device,
4 ... sheet lifter device, 5 ... tilt device, 6 ... reclining device, 11 ... control unit,
12 ... operation part, 20 ... engine control unit, 31, 32 ... rail part,
31A, 32A ... fixed rail, 31B, 32B ... movable rail, 33 ... first drive unit,
41A, 41B, 41C, 41D ... lifter link, 42 ... second drive unit,
51, 52 ... tilt arm, 53 ... third drive unit, 61, 62 ... recliner,
63: Fourth drive unit, 63A: Rod.

Claims (2)

A vehicle seat installed in a vehicle capable of switching between an automatic driving state and a manual driving state,
The seat body,
A slide device for displacing the seat body in the front-rear direction;
A sheet lifter device for vertically displacing the sheet body;
In accordance with the switching of the driving state of the vehicle, a control unit that shifts the seat body to an automatic driving posture or a manual driving posture;
With
The control unit is configured to avoid a collision between an object disposed below the seat main body and the seat main body in the automatic driving posture when the seat main body is shifted from the automatic driving posture to the manual driving posture. A vehicle seat, wherein the seat body is displaced downward by the seat lifter device after the seat body is displaced forward by the slide device. The vehicle seat according to claim 1,
The control unit stores the manual driving posture immediately before shifting to the automatic driving posture, and shifts the seat body from the automatic driving posture to the stored manual driving posture.

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