JP2007097993A - Automobile seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an unnecessary movement of an ottoman body so as to reduce operating time. <P>SOLUTION: When a sitting determination means 11s determines that a person sits on a seat body, a control means ECU controls an elevating mechanism so as to raise the ottoman body in a first position so that the ottoman body keeps the legs of the sitting person raised in a specified rotation position when the seat body is rotated by a rotating mechanism. When the sitting determination means 11s determines that the person is not sitting on the seat body, the control means ECU controls the elevating mechanism so that the ottoman body stays at a second position below the first position at a specified rotation position when the seat body is rotated by the rotating mechanism. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle seat including an ottoman body that lifts a leg portion of a seated person sitting on the seat body.

Various types of vehicle seats have been proposed.
For example, a vehicle seat described in Patent Document 1 includes a plate-shaped ottoman body that lifts a lower part of a knee of a seated person sitting on the seat body, and an angle adjustment mechanism that adjusts an inclination angle of the ottoman body. ing. When the angle adjustment mechanism operates and the ottoman body rotates upward (in a direction in which the inclination angle decreases), the leg of the seated person is lifted. Conversely, when the ottoman body rotates downward (in the direction in which the inclination angle increases), the leg of the seat occupant descends, and the leg of the seat occupant reaches the floor in the middle.

JP-A-11-253271

In general, in this type of vehicle seat, the operation of the ottoman body cannot be changed depending on whether a seated person is seated on the seat body or not.
For example, when the vehicle seat is rotated from the vehicle forward position to the horizontal position, the ottoman body may be raised at a predetermined rotation position to avoid interference between the vehicle body, the seated person, and the seat body (ottoman body). In this case, in the above-described vehicle seat, the ottoman main body is lifted in the same manner as when seated, even when a seated person is not seated on the seat main body. However, when a seated person is not seated on the seat body, interference between the vehicle body and the seat body (ottoman body) may be avoided without raising the ottoman body as much as when there is a seated person.

  The present invention has been made to solve the above-described problems, and the problem to be solved by the present invention is that the ottoman has a case where a seated person is seated on the seat body and a case where the seated person is not seated. The operation of the main body can be changed to reduce unnecessary movement of the ottoman main body and to shorten the operation time.

The above-described problems are solved by the inventions of the claims.
The invention of claim 1 includes a seat body, an ottoman body that lifts a leg of a seated person seated on the seat body, an elevating mechanism that raises and lowers the ottoman body, a forward position that faces the front of the vehicle, and getting on and off the seat body. Control for controlling the rotation mechanism that rotates horizontally between the outward position facing the mouth, the seating determination means that determines whether or not a seated person is seated on the seat body, the elevating mechanism, and the rotation mechanism And when the seat discriminating means determines that the seated person is seated on the seat body, the control means is configured to perform a predetermined rotation when the seat body is rotated by the rotating mechanism. The ottoman body is raised to the first position by controlling the elevating mechanism so that the ottoman body can maintain the lifted position of the leg of the occupant at the position. When the seating discriminating means determines that a seated person is not seated on the seat main body, the control means is configured such that when the seat main body is rotated by the rotating mechanism, the ottoman main body is in the predetermined rotational position. The elevating mechanism is controlled so as to maintain a second position lower than the first position.

According to the present invention, when it is determined by the seating determination means that the seated person is seated on the seat body, the control means is configured to rotate the ottoman body at a predetermined rotational position when the seat body is rotated by the rotation mechanism. The ottoman body is raised to the first position by controlling the elevating mechanism so as to maintain the lifted leg portion of the seated person.
Further, when it is determined that the seated person is not seated on the seat body by the seating determining means, the control means is configured to move the ottoman at a predetermined rotational position when the seat body is rotated by the rotating mechanism. The elevating mechanism is controlled so that the main body maintains a second position lower than the first position.
As described above, since the operation of the ottoman body changes depending on whether the seated person is seated on the seat body or not, the useless movement of the ottoman body can be reduced and the operation time can be shortened. Can do.

  According to the present invention, since the operation of the ottoman body changes depending on whether the seated person is seated on the seat body or not, the useless movement of the ottoman body is reduced and the operation time is shortened. be able to.

[Embodiment 1]
Next, Embodiment 1 of the present invention will be described with reference to FIGS. FIGS. 1 and 2 are Ottoman devices used in the vehicle seat according to the present embodiment and a wiring block diagram of the vehicle seat, and FIGS. 3 and 4 are flowcharts showing the operation of the Ottoman device. FIG. 5 is a schematic plan view of a vehicle including a vehicle seat, and FIGS. 6 to 9 are side views showing the configuration of the vehicle seat. In the figure, RH represents the vehicle right direction, LH represents the vehicle left direction, FR represents the vehicle front direction, and RR represents the vehicle rear direction.
In the embodiment described below, the driver's seat is exemplified as the vehicle seat 1.

<Outline of configuration of vehicle seat 1>
The vehicle seat 1 is located at the right front portion of the vehicle M as shown in FIG. A movable steering wheel 2 is disposed in front of the vehicle seat 1. Also, on the right and left sides of the vehicle M, on the right side of the driver's seat (vehicle seat 1) and the left side of the passenger seat 3, a so-called gull wing that opens and closes by turning up and down using an electric motor as a drive source. The motorized driver's seat door 4 and the passenger seat door 5 are equipped.
The vehicle seat 1 and the passenger seat 3 can be moved within a certain range in the vehicle front-rear direction by a back-and-forth movement mechanism 20 which will be described later, and are also moved to a front-facing position facing the front of the vehicle and the entrance / exit side by a rotation mechanism 30 which will also be described later. It is provided so as to be able to rotate about 90 ° horizontally between the facing outward position. Since the passenger seat 3 is configured in substantially the same manner as the vehicle seat 1, a support structure for the vehicle seat 1 will be described below.

  As shown in FIGS. 2, 6, and the like, the vehicle seat 1 includes a seat body 10, a longitudinal movement mechanism 20 for moving the seat body 10 in a predetermined range in the vehicle longitudinal direction, and a seat body 10. The rotating mechanism 30 that rotates horizontally between the forward-facing position and the outward-facing position described above, the ottoman device 50 having the ottoman body 51 that pushes up the leg L of the seated person seated on the seat body 10 from below, and the seat body 10 A tilt mechanism 70 (see FIG. 9) that tilts back and forth and a control unit ECU that controls the operation of each of the mechanisms 20, 30, 50, and 70 are provided.

As shown in FIG. 2, the back-and-forth moving mechanism 20 includes a pair of left and right fixed rails 21 and 21 fixed on the floor F of the vehicle M, and a slide table that can slide back and forth along the fixed rails 21 and 21. 22. Further, on the floor F of the vehicle M, a slide motor 24 that is a drive source of the back-and-forth movement mechanism 20 is attached.
A rotation mechanism 30 is installed on the slide table 22 of the back-and-forth movement mechanism 20, and the seat body 10 is installed on a rotation base (not shown) of the rotation mechanism 30 via a tilt mechanism 70. In addition, a rotation motor 34 (see FIG. 2) that is a drive source of the rotation mechanism 30 is attached to the slide table 22.
The tilt mechanism 70 is a mechanism that tilts the seat body 10 back and forth, and is installed on the rotation base of the rotation mechanism 30. As shown in FIG. 9, the tilt mechanism 70 includes a pair of left and right tilt rails 72, 72, and the tilt rails 72, 72 are fixed on the rotating base in a state of being curved upward. Has been. Sliding blocks (not shown) are connected to the left and right tilt rails 72, 72, respectively, and a tilt frame (not shown) for supporting the seat body 10 is fixed to the sliding blocks. As a result, the tilt frame that supports the seat body 10 can move along the left and right tilt rails 72, 72.

On the rotation base of the rotation mechanism 30, a screw shaft 77 is rotatably supported along the tilt rails 72, 72, and a tilt motor 76 is connected to the screw shaft 77. A nut 78 is screwed onto the screw shaft 77, and the nut 78 is fixed to the tilt frame that supports the seat body 10. As a result, when the tilt motor 76 is driven, the seat body 10 tilts forward or backward while moving along the tilt rails 72 and 72 due to the screwing action of the nut 78 and the screw shaft 77. Become. The screw shaft 77 and the tilt motor 76 are supported by the rotary base so as to be swingable up and down so that the nut 78 fixed on the seat body 10 side can move smoothly along the screw shaft 77. .
As shown in FIG. 2, the seat body 10 includes a seat cushion 11 and a seat back 12, and a seating sensor 11 s for detecting whether or not a seated person is seated substantially inside the seat cushion 11. Has been.

<About the configuration of the ottoman device 50>
Further, as shown in FIGS. 2 and 6 and the like, an ottoman device 50 is provided at the front portion of the seat cushion 11. The ottoman device 50 includes an ottoman body 51 that lifts a leg L of the seated person. As shown in FIG. 8, the ottoman main body 51 includes an upper knee contact portion 51 u that receives the back side of the upper knee Lu above the knee (the lower surface side in the seated state) and a lower portion below the knee. The lower knee contact part 51d which receives the back side of the lower knee lower part Ld is provided. As shown in the drawing, the above-knee contact portion 51u and the below-knee contact portion 51d are bent in an L shape. Further, in the retracted state of the ottoman main body 51, as shown in FIGS. 6 and 7, the above-knee contact portion 51u forms a substantially flush seating surface with the seat cushion 11. That is, the ottoman main body 51 of this example constitutes a part of the seat cushion 11 when stored.
The ottoman body 51 is provided so as to be movable between a storage position (lower limit position) located along the front portion of the seat cushion 11 and a holding position moved upward. An ottoman fixing frame (not shown) is attached to the lower surface side of the seat cushion 11, and two ottoman motors 53, 53 are connected to the lower surface of the ottoman fixing frame. The two ottoman motors 53 and 53 rotate in the same direction and at the same speed. Further, both ottoman motors 53, 53 are started and stopped simultaneously. The rotation of the ottoman motors 53, 53 is transmitted to a pair of left and right pinion gears 55, 55.
A pair of left and right ottoman rails 57, 57 are attached below the ottoman motors 53, 53 as shown in FIG. The left and right ottoman rails 57 and 57 are positioned in front of the seat cushion 11 and are curved in a downwardly convex direction. Each of the ottoman rails 57, 57 is provided with one sliding block (not shown) so that it can move smoothly without rattling.

A rear portion of the main body frame 59 fixed to the ottoman main body 51 side is fixed to each of the sliding block bodies. Furthermore, racks 60 are attached to the left and right body frames 59, 59, respectively. The left and right racks 60, 60 are curved in a downward convex manner, like the ottoman rail 57. The left and right racks 60, 60 are curved with the same curvature as the ottoman rails 57, 57. An ottoman main body 51 is attached between the front end portions of the pair of left and right main body frames 59 provided in this way. Further, pinion gears 55 and 55 are meshed with the pair of left and right racks 60 and 60, respectively.
For this reason, when the ottoman motors 53 and 53 are started and the left and right pinion gears 55 and 55 are rotated, the left and right racks 60 and 60 and thus the main body frames 59 and 59 are connected to the ottoman rails 57 and 59 through the meshing state with the respective racks 60 and 60. 57, so that the ottoman main body 51 moves up and down along an arc-shaped moving path (curved path).
As shown in FIG. 7, when the ottoman body 51 is returned to the retracted position (lower limit position), the above-knee contact portion 51u forms a substantially flush seat with the seat cushion 11 as described above. Further, in this retracted position, the below-knee contact portion 51d of the ottoman main body 51 is positioned in a state of protruding downward from the front end of the above-knee contact portion 51u.
On the other hand, when the ottoman motors 53 and 53 are started to the holding side (upward side), the ottoman body 51 rises from the storage position shown in FIG. 7 toward the upper holding position along the curved path. When the ottoman main body 51 starts to rise from the retracted position, the above-knee Lu of the seated person is first pushed upward by the above-knee contact portion 51u. Therefore, the seated person's above-knee Lu is rotated upward (clockwise in FIG. 7) about the hip point HP near the base. When the upper knee Lu is rotated upward, the lower knee Ld is rotated downward (counterclockwise in FIG. 7) around the knee N, and as a result, the seated person further bends the knee N. It becomes a state. In this way, the ottoman body 51 is further raised and the leg portion L of the seated person further bends the knee N, so that the below-knee contact portion 51d of the ottoman body 51 is brought into contact with the back surface of the seated person's below-knee Ld. . Thereafter, the ottoman body 51 is raised in a state where the above-knee contact portion 51u is brought into contact with the back surface of the seated person's above-knee Lu and the below-knee contact portion 51d is brought into contact with the back surface of the seated person's below-knee Ld. To the holding position.
A state where the ottoman body 51 is raised to the holding position is shown in FIG. As shown in the figure, when the ottoman main body 51 reaches the holding position, the leg portion L of the seated person is held at a height where the foot FT is lifted from the vehicle floor F with the knee N folded.
That is, the ottoman motors 53 and 53, the racks 60 and 60, the pinion gear 55, and the like correspond to the lifting mechanism of the present invention.

<Outline of control of vehicle seat 1>
Each of the DC motors of the slide motor 24 of the longitudinal movement mechanism 20, the rotation motor 34 of the rotation mechanism 30, the ottoman motors 53 and 53 of the ottoman device 50, and the tilt motor 76 of the tilt mechanism 70 in the vehicle seat 1 is provided with a pulse sensor. The rotation direction and the rotation angle can be detected. The signal of the pulse sensor in each DC motor is input to the control unit ECU (see FIG. 2). Further, each DC motor is PWM-controlled by a control unit ECU and a motor drive circuit (see FIG. 1), and the output of each DC motor is adjusted.

<Control of the ottoman device 50>
As described above, the ottoman motors 53 and 53 of the ottoman device 50 are provided with the pulse sensors 53p and 53p, respectively, and the signals of the pulse sensors 53p and 53p are input to the control unit ECU as shown in FIG. . The control device ECU detects the rotation direction of the ottoman motors 53 and 53 based on the signals of the pulse sensors 53p and 53p, and determines whether the ottoman body 51 is rising or falling. Further, the control unit ECU detects the rotation angle of the ottoman motors 53, 53 based on the signals of the pulse sensors 53p, 53p, and the ascending speed or the descending speed of the ottoman body 51 based on the rotation angle per unit time. Is calculated.
Further, a signal from the seating sensor 11s of the seat cushion 11 is input to the control device ECU. As a result, the control device ECU can determine whether or not the seated person is seated on the seat cushion 11. That is, the seating sensor 11s and the control device ECU correspond to the seating determination unit of the present invention.
Based on the signals of the pulse sensors 53p, 53p of the ottoman motors 53, 53, the control device ECU calculates the output values of the ottoman motors 53, 53 and outputs the signals to the motor drive circuit (see FIG. 1). . The motor drive circuit controls the width of pulses supplied to the ottoman motors 53 and 53 based on the signal from the control unit ECU (PWM control), and outputs (C (constant) × T (torque) of the ottoman motors 53 and 53 ) × N (number of revolutions)).

Further, the control unit ECU is configured to be capable of PWM control output of brake signals of the ottoman motors 53, 53 to the motor drive circuit. The motor drive circuit receives the brake signal from the control unit ECU, stops the supply of electric power to the ottoman motors 53, 53, and electrically shorts the terminals of the ottoman motors 53, 53 (DC motor) (FIG. 1). (See (B) Short brake).
When the terminals of the DC motor are short-circuited and the motor is rotated by an external force, a counter electromotive force is generated in the coil, and a current I resulting from the counter electromotive force flows. As a result, a rotational force is generated between the coil through which the current I flows and the magnetic field of the motor in a direction that prevents the motor from rotating. This is a short brake.
The short brake is used when the ottoman body 51 is gently lowered.

Next, the operation of the ottoman device 50 will be described based on the flowcharts of FIGS. Here, a program for executing the processing based on the flowchart is stored in the ROM of the control unit ECU.
When the seated person is seated on the seat body 10, that is, when the seating sensor 11s is on (YES in step S101), when the rising timing of the ottoman body 51 is reached (YES in step S102), the ottoman motors 53 and 53 are raised. Start on the side. As a result, the ottoman body 51 rises from the storage position shown in FIG. 7 toward the upper holding position along the curved path.
At this time, the control device ECU and the motor drive circuit are loaded with respect to a load (reverse load) in a direction that prevents the ottoman body 51 from being lifted, that is, the weight of the leg L of the seated person, the weight of the ottoman body 51, and the ottoman rails 57, 57. The outputs of the ottoman motors 53 and 53 are controlled so as to overcome the sliding resistance of the sliding block body and to raise the ottoman body 51 at a predetermined speed.

When the ottoman main body 51 starts to rise from the retracted position, the above-knee Lu of the seated person is first pushed upward by the above-knee contact portion 51u. Therefore, the seated person's above-knee Lu is rotated upward (clockwise in FIG. 7) about the hip point HP near the base. When the upper knee Lu is rotated upward, the lower knee Ld is rotated downward (counterclockwise in FIG. 7) around the knee N, and as a result, the seated person further bends the knee N. It becomes a state. In this way, the ottoman body 51 is further raised and the leg portion L of the seated person further bends the knee N, so that the below-knee contact portion 51d of the ottoman body 51 is brought into contact with the back surface of the seated person's below-knee Ld. .
Thereafter, the ottoman body 51 is raised in a state where the above-knee contact portion 51u is brought into contact with the back surface of the seated person's above-knee Lu and the below-knee contact portion 51d is brought into contact with the back surface of the seated person's below-knee Ld. Thus, the holding position shown in FIG. 8 is reached (step S103). When the ottoman body 51 reaches the holding position, the control device ECU and the motor drive circuit control the outputs of the ottoman motors 53 and 53 so that the ottoman body 51 is held at that position.
Here, the holding position of the ottoman body 51 is set to a necessary lift amount for lifting the seated person's foot FT from the vehicle floor F by a certain distance. This setting is stored in the control unit ECU and can be changed arbitrarily.

Next, when the lowering timing of the ottoman body 51 is reached (YES in step S104), ottoman lowering control is performed (step S105). When the ottoman lowering control is started, the supply of power to the ottoman motors 53 and 53 is stopped. As a result, the ottoman body 51 is lowered by the weight of the leg L of the seated person and the own weight. The lowering operation of the ottoman body 51 is transmitted to the ottoman motors 53 and 53 via the racks 60 and 60 and the pinion gears 55 and 55, and the ottoman motors 53 and 53 rotate in the lowering direction. Then, the downward rotation of the ottoman motors 53, 53 is input to the control unit ECU by the pulse sensors 53p, 53p. That is, it is possible to determine whether or not a downward load (reverse load) is applied to the ottoman body 51 from the signals of the pulse sensors 53p and 53p when the ottoman motors 53 and 53 are powered off.
When it is determined that there is a reverse load (YES in step 112 in FIG. 4), the control device ECU performs PWM control output of the brake signals of the ottoman motors 53 and 53 to the motor drive circuit. The motor drive circuit receives the brake signal from the control device ECU and electrically shorts the terminals of the ottoman motors 53, 53 (step S113). As a result, a counter electromotive force is generated in the coils of the ottoman motors 53 and 53, and a force (torque) that prevents the ottoman motors 53 and 53 from rotating in the descending direction is generated by the current I resulting from the counter electromotive force. Then, the control device ECU performs PWM control output of the brake signal so that the torque becomes the brake, so that the ottoman main body 51 gently descends along the ottoman rails 57 and 57 at a stable speed.

This prevents the seated person's foot FT from slowly landing on the floor F or the like, and does not give the seated person anxiety.
In this way, when the seated person's foot FT reaches the floor F or the like, the weight of the seated person's leg L applied to the ottoman main body 51 is reduced, so that the load in the downward direction (reverse load) is significantly reduced. For this reason, the descending speed of the ottoman main body 51 becomes substantially zero, and a decrease in the descending speed is detected by the pulse sensors 53p and 53p. That is, a decrease in reverse load (no reverse load) is detected by the signals of the pulse sensors 53p and 53p. As a result, the determination in step S112 in FIG. 4 is NO, and the control device ECU outputs an ottoman lowering signal to the motor drive circuit. In response to this, the motor drive circuit drives the ottoman motors 53 and 53 in the downward direction. Thereby, the ottoman body 51 is returned to the storage position at a relatively high speed (YES in step S115). In this manner, after the seated person's foot FT has arrived on the floor F or the like, the ottoman body 51 is returned to the storage position at a relatively high speed, so that the storing operation is quickened.
That is, the control device ECU that executes processing based on the flowcharts of FIGS. 3 and 4 corresponds to the control means of the present invention. Further, the holding position of the ottoman main body 51 corresponds to the first position of the ottoman main body 51 in the present invention, and the position of the ottoman main body 51 in a state where the occupant's foot FT has landed on the floor F or the like (other than the storage position) is This corresponds to the second position of the ottoman body 51 in the invention.

Next, the operation of the ottoman device 50 in a state where no seated person is seated on the seat body 10 will be described.
When the seated person is not seated on the seat body 10, that is, when the seating sensor 11s is off (step S101 NO in FIG. 3), when the rising timing of the ottoman body 51 is reached (YES in step S106), the ottoman motors 53, 53 Is activated to the ascending side, and the ottoman body 51 rises to a fixed position (second position) and is held at that position.
Further, when the lowering timing of the ottoman body 51 is reached (YES in step S108), the ottoman motors 53, 53 are started to the lowering side, and the ottoman body 51 is returned to the storage position.

<Overall Operation of Vehicle Seat 1>
The operations of the forward / backward movement mechanism 20, the rotation mechanism 30, the ottoman device 50, and the tilt mechanism 70 that constitute the vehicle seat 1 are associated with each other by the control device ECU.
First, the time of getting off will be described. When a occupant seated in the driver's seat operates a drop-off start switch (not shown), the electric driver's seat door 4 is pivoted upward and opened. Next, the steering wheel 2 starts to move toward the retracted position.
When the retracting operation of the steering wheel 2 is started, the slide motor 24 is activated at the same time or after a certain time thereafter, and the seat body 10 starts to retract toward the rearmost.
Further, during the backward movement of the seat body 10, the ottoman motors 53, 53 are activated and the operation of the ottoman device 50 is started. When getting off, first, the ottoman body 51 starts to rise from the retracted position toward the holding position, whereby the leg portion L of the seat occupant is pushed upward, thereby lifting the seat occupant's foot FT from the vehicle floor F. The When a seated person is not seated on the seat body 10, the ottoman body 51 is raised to a fixed position (second position) and held at that position. The second position is set to a position where the ottoman body 51 and the like do not interfere with the rocker portion R.
When the retracting operation of the seat body 10 and the raising operation of the ottoman body 51 are completed, the rotation motor 34 is activated and the seat body 10 starts to rotate rightward from the forward position toward the entrance / exit toward the front of the vehicle. During this rotating operation, the leg portion L of the seated person is held in the holding position by the ottoman device 50, and the foot FT is prevented from interfering with the rocker portion R.
Next, during the rotation operation of the seat body 10, the tilt motor 76 is activated and the tilt mechanism 70 starts to operate. This timing is set at the time when the seated person's foot FT passes through the locker R and the pillar and reaches the outside of the passenger compartment as the seat body 10 rotates.
When the tilt mechanism 70 starts to operate, the seat body 10 starts to tilt in the forward tilt direction by moving to the outside of the passenger compartment while rotating toward the entrance / exit. At this stage, the seated person's foot FT passes through the rocker portion R and the pillar (entrance / exit) and reaches the outside of the passenger compartment. When the tilt-down operation of the seat body 10 is completed, the relative height of the front portion with respect to the rear portion of the seat cushion 11 is lower than that in the seated state and becomes almost horizontal, so that the seated person can easily get up easily. Become.
Further, during the rotation operation of the seat body 10 toward the entrance / exit and the tilt-down operation toward the forward tilt side, the ottoman device 50 starts to operate toward the storage side. The storing operation of the ottoman body 51 is performed at a lower speed than the ascending operation. This is to give the seated person a sense of security by slowly landing on the road surface GL or the vehicle floor F with the foot FT.
As described above, when the seat body 10 rotates toward the entrance / exit, the tilt-down operation is completed, and the ottoman body 51 is returned to the storage position, a series of operations when the vehicle seat 1 is unloaded is completed.

Next, the operation of each mechanism 20, 30, 50, 70 when riding will be described.
First, when a seated person sits on the seat body 10 tilted forward and operates a boarding / unstarting switch (not shown), the ottoman motors 53 and 53 of the ottoman device 50 are activated to the ascending side, and the ottoman body 51 is moved from the storage position. Begins to rise toward the holding position. When a seated person is not seated on the seat body 10, the ottoman body 51 is raised to a fixed position (second position) and held at that position.
Further, the tilt mechanism 70 is activated during the ascending operation of the ottoman body 51, and the seat body 10 is tilted up. When the tilt motor 76 of the tilt mechanism 70 is activated and the seat body 10 is tilted up, the front portion of the seat cushion 11 is lifted with respect to the rear portion while the seat body 10 moves toward the vehicle interior side.
When the tilt-up operation is started, the rotation mechanism 30 starts to operate and the door 4 starts to close. The start of the operation of the rotation mechanism 30 is set when the seat occupant's foot FT moves to the vehicle interior side by the tilt mechanism 70 to a position where it does not interfere with the entrance / exit of the rocker portion R or the pillar. The ottoman body 51 is raised to the holding position, the leg L of the seated person is pushed up from below, and the seat body 10 is rotated toward the forward position facing the front of the vehicle with the seat body 10 tilted up.
When the seat body 10 and the seated person reach the forward-facing position facing the front of the vehicle, the rotation motor 34 is stopped and the rotation operation ends. When the rotation operation ends, at the same time, the steering wheel 2 is taken out to a usable position where the turning operation can be performed. Separately from this, the slide motor 24 of the forward / backward movement mechanism 20 is activated to the forward side, and the seat body 10 advances from the rear most.
Simultaneously with the start of the forward movement of the seat body 10, the ottoman motors 53, 53 are controlled to descend, and the ottoman body 51 descends from the holding position toward the storage position.
After the rotation operation of the seat body 10 is completed, the seat body 10 advances to a seat position that matches the height of the seated person. Thereafter, the descending of the ottoman body 51 causes the seat occupant's foot FT to land on the vehicle floor F, and the ottoman body 51 is returned to the retracted position.

<Advantages of vehicle seat 1>
According to the vehicle seat 1 of the present embodiment configured as described above, when the seating sensor 11s determines that a seated person is seated on the seat body 10, the control unit ECU rotates the seat body 10 When the ottoman body 51 is rotated by the mechanism 30, the ottoman motors 53, 53 are controlled to hold the ottoman body 51 so that the ottoman body 51 can keep the seated leg L lifted at a predetermined rotational position. The first position is raised.
Further, when the seating sensor 11s determines that the seated person is not seated on the seat body 10, the control device ECU detects the ottoman body 51 at a predetermined rotational position when the seat body 10 is rotated by the rotation mechanism 30. The ottoman motors 53 and 53 are controlled so that the second position is lower than the holding position (first position).
Thus, since the operation of the ottoman body 51 changes depending on whether a seated person is seated on the seat body 10 or not, the useless movement of the ottoman body 51 is reduced, and the operation time is shortened. Can be achieved.
In addition, the second position is set to a position where the ottoman body 51 does not lift the leg portion L of the seated person who is seated on the seat body 10, so when the seated person is not seated on the seat body 10, The raising and lowering operation of the ottoman body 51 is minimized.

<About changes>
Various modifications can be made to the embodiment described above. For example, in the present embodiment, an example in which the second position of the ottoman body 51 is set to a position (other than the storage position) where the seated person's foot FT has landed on the floor F or the like has been described. When 51 does not interfere with the rocker portion R or the like of the vehicle M, the storage position can be the second position.
Moreover, although the example which changes the operation | movement of the ottoman main body 51 with the case where the seated person is seated on the seat main body 10 and the case where it is not sitting was shown, operation | movement of the back-and-forth movement mechanism 20, the tilt mechanism 70, etc. is changed. It is also possible.

It is the wiring block diagram (A figure) of the ottoman apparatus used for the vehicle seat which concerns on this embodiment, and the schematic diagram (B figure) showing a short brake. It is a wiring block diagram of the vehicle seat which concerns on this embodiment. It is a flowchart showing operation | movement of an ottoman apparatus. It is a flowchart showing operation | movement of an ottoman apparatus. It is a schematic plan view of a vehicle provided with a vehicle seat. It is a side view showing the structure of the vehicle seat. It is a side view of the drive mechanism of an ottoman device. It is a side view of the drive mechanism of an ottoman device. It is a side view of a tilt mechanism.

Explanation of symbols

M ... Vehicle 1 ... Vehicle seat 10 ... Seat body 11 ... Seat cushion 11s ... Seating sensor (sitting determination means)
DESCRIPTION OF SYMBOLS 12 ... Seat back 22 ... Slide table 24 ... Slide motor 20 ... Front-rear drive mechanism 30 ... Rotating mechanism 34 ... Rotating motor 50 ... Ottoman device 51 ... Ottoman main body 53 ... Ottoman motor (elevating mechanism)
55 ... Pinion gear (lifting mechanism)
57… Ottoman rail (elevating mechanism)
60 ... Rack (elevating mechanism)
L: Leg part FT of seated person ... Foot ECU of seated person ... Control device (control means, seating discrimination means)

Claims (1)

The seat body,
An ottoman body that lifts a leg of a seated person seated on the seat body;
An elevating mechanism for elevating the ottoman body;
A rotating mechanism for horizontally rotating the seat body between a forward position facing the front of the vehicle and an outward position facing the entrance;
Seating discriminating means for discriminating whether a seated person is seated on the seat body;
Control means for controlling the lifting mechanism and the rotating mechanism,
When it is determined by the seating determination means that a seated person is seated on the seat body, the control means is configured such that when the seat body is rotated by the rotation mechanism, the ottoman body is in a predetermined rotational position. Controlling the elevating mechanism to raise the ottoman body to the first position so as to maintain the lifted state of the leg of the seated person,
Further, when it is determined that the seated person is not seated on the seat body by the seating determining means, the control means is configured to move the ottoman at a predetermined rotational position when the seat body is rotated by the rotating mechanism. The vehicular seat, wherein the elevating mechanism is controlled so that a main body maintains a second position lower than the first position.

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