JP5418826B2 - Sheet state change device - Google Patents

Description

  The present invention relates to a seat state changing device that changes a state of a seat having a seat cushion and a seat back between a retracted state and a seated state.

  In recent years, the size of vehicles has increased, and the demand for vehicles called so-called 1BOX cars has increased. Some 1BOX cars of this type have three rows of seats in the passenger compartment. The three rows of sheets include a first row sheet, a second row sheet, and a third row sheet. In general, the first row seats correspond to the driver seat and the passenger seat. The second row sheet corresponds to a sheet behind the first row sheet. The third row sheet corresponds to the last sheet.

  Such a third row seat is used as a seating space when a large number of people are put on the vehicle, and when it is desired to secure the size of the luggage compartment located behind the passenger compartment, the third row seat is folded. Used as storage space. As an example of a technique for using the third row seat as a seating space or a storage space in this way, there is one described in Patent Document 1 showing the source below.

  The vehicle seat described in Patent Literature 1 includes a seat cushion that becomes a seating portion in a seated state of an occupant and a seat back that becomes a backrest portion in the seated state. The vehicle seat is held in the use position when the occupant is seated, and is held in the storage position when the capacity of the luggage compartment is secured. In the use position, the seat cushion is held at a position where an occupant can be seated, and the seat back is held at an upright position that supports the back of the occupant seated on the seat cushion. On the other hand, in the retracted position, the seat cushion is held in the retracted position set to the lower rear side of the use position, and the seat back is held in the forward position where it is arranged in front of the seat cushion moved to the retracted position. Is done.

JP 2008-207636 A

  The vehicle seat described in Patent Document 1 is generally not provided with a position detection sensor that detects the absolute position of the seat cushion or the seat back in order to reduce the cost of components (to achieve low cost). For this reason, the movement amount of the seat cushion and the seat back is calculated based on the displacement amount of an actuator such as a motor that moves the seat cushion and the seat back independently. The amount of displacement of such an actuator is, for example, calculated from the actual position and the position calculated by inertial operation after the temperature change, momentary power failure (so-called momentary power interruption), actuator operation stop, and their accumulation. There may be errors between them. Furthermore, for some reason, the displacement amount of the actuator cannot be detected at all, and the position of the seat cushion or the seat back may not be calculated.

  In view of the above problems, an object of the present invention is to change the seat state in which the seat state can be appropriately changed even when the position of the seat cushion or the seat back becomes unclear when the seat state is changed. To provide an apparatus.

  In order to achieve the above object, the characteristic configuration of the seat state changing device according to the present invention is to provide a seat in a seated state in order to change the state of a seat having a seat cushion and a seat back between a stored state and a seated state. The seat cushion has a region that overlaps at least partly between the seating position of the cushion and the seatback retracted position in the retracted state, and detects the current position of the seat cushion according to the operation of the actuator for seat cushion that moves the seat cushion A seat cushion position detection unit; a seat back position detection unit that detects a current position of the seat back in accordance with an operation of a seat back actuator that moves the seat back; and when the seat cushion is changed, the seat cushion The current position of the seatback and the current position of the seat back When at least one of them is unclear, after moving one of the seat cushion and the seat back that does not move to the overlapping region side to the end portion related to the change of the state of the seat, the other is moved And an actuator control unit that moves to an end portion related to the change of the state of the sheet.

  With such a characteristic configuration, even when the seat cushion and the seat back have a region overlapping at least part of the seat cushion seating position in the seated state and the seatback retracted position in the stowed state, Among them, since they are moved first from the overlapping area, there is no possibility of interfering with each other's movements. Accordingly, when the seat state is changed, the seat state can be appropriately changed even when the position of the seat cushion or the seat back becomes unclear.

  Further, when changing the seat state from the retracted state to the seated state, if at least one of the current position of the seat cushion and the current position of the seat back is unclear, the actuator control unit, It is preferable that the seat cushion is moved to the end portion in the seating position direction of the seat cushion after the seat back is moved to the end portion in the seating position direction of the seat back.

  With such a configuration, the seat back is moved to the end portion in the seating direction before the seat cushion is moved to the seating position, so that the seat cushion can be appropriately moved to the end portion in the seating direction. .

  Further, when changing the seat state from the seating state to the retracted state, if at least one of the current position of the seat cushion and the current position of the seat back is unclear, the actuator control unit, It is preferable that after the seat cushion is moved to the end of the seat cushion in the retracted position direction, the seat back is moved to the end of the seat back in the retracted position direction.

  With such a configuration, the seat cushion is moved to the end portion in the retracting direction before the seat back is moved to the retracted position, so that the seat back can be appropriately moved to the end portion in the retracting direction. .

  The seat cushion position detection unit and the seat back position detection unit detect a pulse signal output in response to the operation of the seat cushion actuator and the seat back actuator, and the seat cushion and the seat back Based on the difference between the pulse number of the pulse signal detected when moving from the start position to the stop position and the pulse number of the pulse signal required to move between the preset seating position and the storage position, It is preferable to determine whether at least one of the current position of the seat cushion and the current position of the seat back is unclear.

  With such a configuration, it is possible to appropriately determine whether or not the position of the seat cushion and the position of the seat back are unclear. Accordingly, it is possible to appropriately change the sheet state based on the determination result.

It is the figure which showed the vehicle provided with the seat state change apparatus from diagonally backward. It is a side view which shows the seating state and retracted state of a seat. It is the block diagram which showed typically the schematic structure of the sheet | seat state change apparatus. It is a figure shown about the interference area | region which concerns on the change of the state of a sheet | seat. It is a figure shown about the example in the case of rushing into an interference area in the change of the state of a sheet. It is a figure shown about the example in the case of avoiding an interference area and changing the state of a sheet. It is a flowchart which shows the process which a sheet | seat state change apparatus performs.

  Hereinafter, the sheet state changing apparatus 1 according to the present invention will be described. The seat state changing device 1 has a function of changing the state of the seat 2 having the seat cushion 23 and the seat back 22 between a retracted state and a seated state. According to the seat state changing device 1, the position of the seat back 22 and the seat cushion 23 can be changed independently. The stowed state corresponds to the state of the seat 2 suitable for storing a large luggage, and the seated state corresponds to the state of the seat 2 suitable for a passenger to sit. FIG. 1 is a view showing a vehicle 100 including such a seat state changing device 1 obliquely from the rear.

  A vehicle 100 shown in FIG. 1 shows a state in which a slide door 51 provided on the left side surface of the vehicle 100 and a back door 52 provided on the rear side surface of the vehicle 100 are opened. The vehicle 100 is a so-called 1BOX car, and has three rows of seats in the passenger compartment. The third row sheet includes a first row sheet 31, a second row sheet 32, and a third row sheet 33. The first row seat 31 corresponds to a driver seat and a passenger seat. The second row sheet 32 corresponds to a sheet immediately after the first row sheet 31. The third row seat 33 corresponds to the rearmost seat in the passenger compartment. The sheet state changing device 1 according to the present embodiment will be described as an example in the case of changing the state of the third row seat 33.

  FIG. 2A is a side view showing a seating state of one seat 2 among a plurality of seats of the third row seat 33. FIG. 2B is a side view showing the stored state of the sheet 2. The seat 2 includes the seat back 22 and the seat cushion 23 as described above. Further, as shown in FIGS. 2A and 2B, the seat 2 in the present embodiment includes a headrest 21. When the seat 2 is in the seated state, the headrest 21 has a function of protecting the head of an occupant seated on the seat 2 from a load acting on the rear of the vehicle. The seat back 22 has a backrest function that allows an occupant sitting on the seat 2 to lean against the seat 2. The seat cushion 23 has a function of supporting the occupant's buttocks seated on the seat 2.

  As shown in FIG. 2A, the seated state is a state in which the seat back 22 and the headrest 21 are erected with respect to the seat cushion 23. Therefore, the seated person can sit on the seat cushion 23 and lean against the seat back 22 and the headrest 21. As shown in FIG. 2B, the retracted state means that the headrest 21 is folded to the seat back 22 side, the seat cushion 23 slides backward, and the seat back 22 is moved forward to the seated seat cushion 23 position. It becomes a state. Therefore, the seat back 22 and the seat cushion 23 are in a substantially flat state, and a space in which a large luggage can be loaded can be secured in the luggage compartment.

  Such a change of the seat 2 of the third row seat 33 to the seated state or the retracted state is performed by operating the operation switch 11. As shown in FIG. 1, the operation switch 11 of the vehicle 100 according to the present embodiment is disposed behind the third row seat in the vehicle interior, that is, in the cargo compartment (in FIG. 1, the left side of the cargo compartment). Part). The operation switch 11 is operated by a user who intends to change the state of the seat 2.

  FIG. 3 is a block diagram schematically showing a schematic configuration of the sheet state changing device 1. The seat state changing device 1 includes the above-described operation switch 11, a motor control unit 12, a seat back motor 13, a seat cushion motor 14, a position detection unit 15, and an ambiguity determination unit 16. The In the sheet state changing apparatus 1 configured as described above, the above-described functional unit for performing various processes for changing the state of the sheet 2 using the CPU as a core member is constructed by hardware and / or software. .

  The operation switch 11 is disposed in the luggage compartment of the vehicle 100 as described above. The user can change the state of the seat 2 between the retracted state and the seated state by operating the operation switch 11. When the operation switch 11 is operated by the user, a signal indicating whether the operation to the retracted state or the operation to the seating state has been performed is transmitted to the motor control unit 12 described later.

  The seat cushion motor 14 moves the seat cushion 23 between a seating position where a seated person can sit and a retracted position located on the lower rear side of the seating position. The seat cushion motor 14 corresponds to the seat cushion actuator according to the present invention. The seating position where the seated person can sit corresponds to the position of the seat cushion 23 shown in FIG. 2A, and this position is the seating position related to the seat cushion 23. The retracted position located at the lower rear side of the seating position corresponds to the position indicated by the solid line on the lower rear side from the seating position of the seat cushion 23 indicated by the broken line in FIG. This position becomes the storage position related to the seat cushion 23. The seat cushion motor 14 moves the seat cushion 23 between the seating position and the storage position.

  The seat back motor 13 has a seat between a seating position where the seated person can be seated back and a seating position of the seat cushion 23 that can be retracted by tilting from the seating position and a storage position overlapping at least partly. The back 22 is moved. The seat back motor 13 corresponds to the seat back actuator according to the present invention. The seating position where the seated person is held so as to be able to lean back corresponds to the position of the seat back 22 shown in FIG. 2A, and this position is the seating position related to the seat back 22. The seating position of the seat cushion 23 that can be retracted by tilting from the seating position corresponds to the position of the seat back 22 shown in FIG. 2B, and at least partially overlaps the seating position of the seat cushion 23 described above. It has the area to do. That is, the position is the storage position related to the seat back 22. The seat back motor 13 moves the seat back 22 between the seating position and the storage position.

  The position detection unit 15 includes a seat back position detection unit 15a and a seat cushion position detection unit 15b. Here, the seat state changing device 1 is not provided with a position detection sensor for detecting the positions of the seat back 22 and the seat cushion 23, and is output according to the rotation of the motor that changes the respective positions. The position is specified based on the pulse signal. Accordingly, the seat back position detection unit 15 a detects the current position of the seat back 22 according to the operation of the seat back motor 13. The seat cushion position detection unit 15 b detects the current position of the seat cushion 23 in accordance with the operation of the seat cushion motor 14.

  The seat back position detection unit 15 a and the seat cushion position detection unit 15 b count the number of pulse signals output in response to the rotation of the seat back motor 13 and the seat cushion motor 14. Thereby, it is possible to specify the amount of displacement from the movement start position. Further, when the seat back 22 and the seat cushion 23 reach the end on the mechanism (so-called mechanical end point), the Hi level time of the pulse signal transmitted from each motor reaches the end on the mechanism. In this state, the time is longer than the Hi level time of the pulse signal. Therefore, the seat back position detection unit 15a and the seat cushion position detection unit 15b count the number of pulses of the pulse signal and also count the time of the Hi level of the pulse signal. The number of pulses counted by the seat back position detection unit 15a and the seat cushion position detection unit 15b and the time of the Hi level are transmitted to the motor control unit 12 described later.

  Here, when the state of the seat 2 is changed as described above, the storage position of the seat back 22 and the seating position of the seat cushion 23 have an area where at least a part thereof overlaps. Therefore, when the seat back 22 and the seat cushion 23 are moved, there is a possibility that they interfere with each other. Such interference occurs in an interference area defined according to the positional relationship between the seat back 22 and the seat cushion 23. Such an interference region is illustrated in FIG.

  FIG. 4A is a diagram showing such an interference region and a control movement path when the seat 2 is changed from the seating state to the retracted state. FIG. 4B is a diagram showing an interference area and a movement path in control when the seat 2 is changed from the retracted state to the seated state. 4A and 4B, the vertical axis corresponds to the position of the seat back 22, and the horizontal axis corresponds to the position of the seat cushion 23. Therefore, the coordinates in FIGS. 4A and 4B correspond to the state of the sheet 2. In each axis, a seating end point and a storage end point are shown. The seating end point corresponds to the end point when moving in the seating position direction, and the storage end point corresponds to the end point when moving in the storage position direction.

  When the seat 2 is in the seated state, the seat back 22 and the seat cushion 23 are at the seating end points as shown in FIG. When changing from this state to the retracted state, the seat state changing device 1 moves the seat 2 with the relay point C0 as a target so that the trajectories of the seat back 22 and the seat cushion 23 do not enter the interference region, and thereafter Move to the storage endpoint. On the other hand, when the seat 2 is in the retracted state, as shown in FIG. 4B, the positions of the seat back 22 and the seat cushion 23 are at the retracting end points. When changing from this state to the seating state, the seat state changing device 1 moves the seat 2 with the relay point C0 as a target so that the trajectories of the seat back 22 and the seat cushion 23 do not enter the interference region, and thereafter Move to the seating end point.

  Such movement is based on the premise that the seat back position detection unit 15a and the seat cushion position detection unit 15b accurately specify the current position. That is, when the current position of at least one of the seat back 22 and the seat cushion 23 is not accurate for some reason, for example, as shown in FIGS. 5A and 5B, the interference area is entered. May end up.

  That is, when changing the seat 2 in the seated state to the retracted state, if the current position of at least one of the seat back 22 and the seat cushion 23 is not accurate, the relay is performed as shown in FIG. Although the point C0 has not been reached, the sheet state changing device 1 may recognize that it has reached the relay point C0. In such a case, if the seat control device 1 moves only the seat back 22 from the position C1, there is a possibility of entering the interference region. Similarly, when the seat 2 in the retracted state is changed to the seated state, if the current position of at least one of the seat back 22 and the seat cushion 23 is not accurate, FIG. 5B shows. Thus, although the relay point C0 has not been reached, the sheet state changing apparatus 1 may recognize that the relay point C0 has been reached. In such a case, when the seat control device 1 moves the seat back 22 and the seat cushion 23 from the position C1, there is a possibility of entering the interference region. The sheet state changing device 1 has a function of preventing the sheet state changing device 1 from entering the interference region.

  When changing the state of the seat 2, the ambiguity determination unit 16 determines whether at least one of the current position of the seat cushion 23 and the current position of the seat back 22 is unclear. The current position of the seat cushion 23 is detected based on a pulse signal output by the above-described seat cushion position detection unit 15b according to the operation of the seat cushion motor 14. Further, the current position of the seat back 22 is detected based on a pulse signal output by the above-described seat back position detection unit 15 a according to the operation of the seat back motor 13.

  The ambiguity determination unit 16 determines, for example, the number of pulses of the pulse signal detected when the seat cushion 23 and the seat back 22 move from the start position to the stop position, and between a preset seating position and a storage position. Whether or not at least one of the current position of the seat cushion 23 and the current position of the seat back 22 is unclear is determined based on the difference from the number of pulses of the pulse signal required to move. The number of pulses of the pulse signal required for moving from the start position to the stop position can be the number of pulses acquired when the previous state of the sheet 2 is changed, or the current state of the sheet 2 It is also possible to use the number of pulses acquired when changing. When using the number of pulses acquired when the state of the previous seat 2 is changed, if this time is a change of the state from the stored state to the seated state, the state from the previous seated state to the stored state This corresponds to the number of pulse signals detected in the change. On the other hand, when this time is a change in the state from the seated state to the stored state, the number of pulse signals detected in the change in the state from the previous stored state to the seated state corresponds. In such a case, it is possible to determine whether or not the current position is unclear before the current state is changed after the previous state is changed. Further, when the number of pulses acquired when changing the state of the sheet 2 this time is used, it is determined whether or not the current position is unclear while moving each part of the sheet 2 to the end point. Is possible.

  A so-called design value corresponds to the number of pulses of a pulse signal required to move between a preset seating position and a storage position. This design value is stored in advance in the ambiguity determination 16 as a value including a predetermined variation. The ambiguity determination unit 16 compares the design value of the pulse signal stored in advance in this way with the pulse signal counted to move from the start position to the stop position, and there is no significant difference between the two. It is determined whether or not. As described above, the design value of the pulse signal includes a predetermined variation. Therefore, when the difference between the actually detected pulse signal and the design value is larger than the predetermined variation, the ambiguity determination unit 16 determines that the current position is unclear. Further, even when the difference between the actually detected pulse signal and the design value is smaller than a predetermined variation, the ambiguity determination unit 16 determines that the current position is unclear. The determination result by the ambiguity determination unit 16 is transmitted to the motor control unit 12 described later.

  When the motor control unit 12 changes the state of the seat 2 and at least one of the current position of the seat cushion 23 and the current position of the seat back 22 is unclear, the motor control unit 12 One of them that does not move to the overlapping region side is moved to the end portion related to the change in the state of the sheet 2, and the other is moved to the end portion related to the change in the state of the sheet 2. The motor control unit 12 corresponds to an actuator control unit according to the present invention. Whether or not at least one of the current position of the seat cushion 23 and the current position of the seat back 22 is unclear is determined by the ambiguity determination unit 16 described above.

  Here, the seat cushion 23 has a region at least partially overlapping the seating position of the seat cushion 23 in the seated state and the retracted position of the seatback 22 in the stowed state. That is, as shown in FIG. 2, the seating position of the seat cushion 23 and the storage position of the seatback 22 are substantially the same position. Therefore, one of the seat cushion 23 and the seat back 22 that does not move to the overlapping region side corresponds to the seat cushion 23 when the seat 2 is changed from the seated state to the retracted state. On the other hand, when the seat 2 is changed from the retracted state to the seated state, the seat back 22 corresponds.

  When the motor control unit 12 changes the state of the seat 2 from the seated state to the retracted state, if at least one of the current position of the seat cushion 23 and the current position of the seat back 22 is unclear, the seat The cushion 23 is moved to the end of the seat cushion 23 in the retracted position direction. Thereafter, the seat back 22 is moved to the end of the seat back 22 in the storage position direction. In addition, when the motor control unit 12 changes the seat 2 from the retracted state to the seated state, if at least one of the current position of the seat cushion 23 and the current position of the seat back 22 is unclear, the seat The back 22 is moved to the end of the seat back 22 in the seating position direction. Thereafter, the seat cushion 23 is moved to the end of the seat cushion 23 in the seating position direction.

  By performing such control, it is possible to appropriately shift from the sitting state to the retracted state as shown in FIG. 6 (a), and appropriately from the retracted state to the seated state as shown in FIG. 6 (b). Can be transferred to. That is, for example, when the seat back 22 and the seat cushion 23 are located at the seating end points in FIG. 6A, the seating state shown in FIG. Thereafter, when changing to the storage end point (storage state), it is assumed that the sheet 2 is in the state shown in (a) at a predetermined position (for example, position C1) in the change process. In such a state (in the position C1), when the position of the seat cushion 23 is determined to be unclear by the ambiguity determination unit 16, only the seat cushion 23 is stored from the position (position C1). Move to the end point (C2) in the direction. Such a state of the sheet 2 is shown in (c). Thereafter, the seat back 22 is moved to the end point in the storage position direction. Such a state of the sheet 2 is shown in FIG. By controlling in this way, it is possible to appropriately change the state of the sheet 2 without entering the interference region.

  On the other hand, for example, when the seat back 22 and the seat cushion 23 are positioned at the storage end point in FIG. 6B, the storage state is as shown in FIG. Thereafter, when the seat 2 is changed to the seating end point (sitting state), it is assumed that the seat 2 is in a state as shown in FIG. In such a state (at position C1), when it is determined by the ambiguity determination unit 16 that the position of the seat back 22 is unclear, only the seat back 22 is seated from that position (position C1). Move to the end point (C2) in the direction. Such a state of the sheet 2 is shown in (c). Then, the seat cushion 23 is moved to the end point in the seating position direction. Such a state of the sheet 2 is shown in FIG. By performing such control, it is possible to appropriately change the state of the sheet 2 without entering the interference region. Therefore, according to the seat state changing device 1, when the state of the seat 2 is changed, the state of the seat 2 can be appropriately changed even when the positions of the seat cushion 23 and the seat back 22 become unclear. It becomes possible.

  Next, the processing performed when the sheet state changing apparatus 1 changes the state of the sheet 2 will be described with reference to the flowchart shown in FIG. First, in the seat state changing device 1, when the operation switch 11 is operated, the motor control unit 12 starts controlling the seat back motor 13 and the seat cushion motor 14 (step # 01).

  Next, the ambiguity determination unit 16 determines whether or not at least one of the current position of the seat back 22 and the current position of the seat cushion 23 is unclear. When the ambiguity determination unit 16 determines that at least one of the current position of the seat back 22 and the current position of the seat cushion 23 is not ambiguous (step # 02: Yes), the motor control unit 12 continues. The seat back motor 13 and the seat cushion motor 14 are controlled (step # 03).

  If it is determined by the position detection unit 15 that both the seat back 22 and the seat cushion 23 have moved to the end part related to the change in the state of the seat 2 (step # 04: Yes), the process is terminated. In this case, the change of the state of the sheet 2 is completed. On the other hand, when it is determined in step # 04 that either the seat back 22 or the seat cushion 23 has not moved to the end portion related to the change in the state of the seat 2 by the position detection unit 15 (step # 04: No) Since the change of the state of the sheet 2 has not been completed, the process returns to step # 02 and the processing is continued.

  State in Step # 02 when the ambiguity determination unit 16 determines that at least one of the current position of the seat back 22 and the current position of the seat cushion 23 is unclear (Step # 02: No) Is changed from the sitting state to the retracted state (step # 05: change to the retracted state), the motor control unit 12 first sets the seat cushion 23 to the end in the retracted position direction. Move (step # 06). After that, the motor control unit 12 moves the seat back 22 to the end in the storage position direction (step # 07). In this way, the sheet 2 can be appropriately changed to the stored state.

  In Step # 02, when the ambiguity determination unit 16 determines that at least one of the current position of the seat back 22 and the current position of the seat cushion 23 is unclear (Step # 02: No). When the change of the state is a change of the seat 2 from the retracted state to the seated state (step # 05: change to the seated state), the motor control unit 12 first sets the seat back 22 to the end in the seating position direction. (Step # 08). Thereafter, the motor control unit 12 moves the seat cushion 23 to the end portion in the seating position direction (step # 09). If it does in this way, seat 2 can be changed into a seating state appropriately.

[Other Embodiments]
In the above embodiment, whether or not at least one of the current position of the seat cushion 23 and the current position of the seat back 22 is unknown is the number of pulses of the pulse signal detected when the state of the seat 2 is changed. It has been described that the determination is performed based on the preset design value of the pulse signal. However, the scope of application of the present invention is not limited to this. Even when it is determined whether the current position is unclear by another method, it is naturally possible to appropriately change the state of the seat 2 as described above.

  The present invention can be used in a seat state changing device that changes the state of a seat having a seat cushion and a seat back between a retracted state and a seated state.

1: Seat state changing device 11: Operation switch 12: Motor controller (actuator controller)
13: Seat back motor (seat back actuator)
14: Seat cushion motor (Seat cushion actuator)
15: Position detection unit 15a: Seat back position detection unit 15b: Seat cushion position detection unit 16: Ambiguity determination unit

Claims (4)

A seat state changing device that changes a state of a seat having a seat cushion and a seat back between a retracted state and a seated state,
The seat cushion has a seating position in the seated state and a seat back retracted position in the retracted state at least partially overlapping the area;
A seat cushion position detector that detects a current position of the seat cushion according to an operation of an actuator for a seat cushion that moves the seat cushion;
A seat back position detection unit that detects a current position of the seat back according to an operation of a seat back actuator that moves the seat back;
When changing the state of the seat, if at least one of the current position of the seat cushion and the current position of the seat back is unclear, the overlapping region of the seat cushion and the seat back An actuator controller that moves one side that does not move to the side to the end portion related to the change in the state of the sheet, and then moves the other side to the end portion related to the change in the state of the sheet;
A sheet state changing device.   When changing the state of the seat from the retracted state to the seated state, if at least one of the current position of the seat cushion and the current position of the seat back is unclear, the actuator controller The seat state changing device according to claim 1, wherein the seat cushion is moved to an end portion in the seating position direction of the seat cushion after the back is moved to the end portion in the seating position direction of the seat back.   When the seat state is changed from the seated state to the retracted state, if at least one of the current position of the seat cushion and the current position of the seat back is unclear, the actuator controller The seat state changing device according to claim 1 or 2, wherein the seat back is moved to an end portion in the retracted position direction of the seat back after the cushion is moved to the end portion in the retracted position direction of the seat cushion. The seat cushion position detection unit and the seat back position detection unit detect a pulse signal output in accordance with the operation of the seat cushion actuator and the seat back actuator;
The number of pulse signals detected when the seat cushion and the seat back move from the start position to the stop position and the number of pulse signals required to move between the preset seating position and the storage position 4. It is determined whether or not at least one of the current position of the seat cushion and the current position of the seat back is unclear based on the difference between the current position and the seat cushion. Sheet state changing device.

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