JP4761123B2 - Sheet device - Google Patents

Description

  The present invention relates to a seat device that can be stored, and more particularly to a vehicle seat device that is characterized by an operation during storage.

  2. Description of the Related Art In recent years, seat devices that can store seats as required in a vehicle interior have been proposed (for example, Patent Documents 1 to 3). The storage seat described in Patent Document 1 can be stored in a storage position in a storage recess 95 provided in the vehicle floor 94 from the seating position when the seat main bodies 92 and 93 are not used (FIG. 7). The seat main bodies 92 and 93 include a seat cushion 92 and a seat back 93, and are tilted to a position where the seat back 93 overlaps the seat cushion 92 during storage.

As a method for storing the sheet main bodies 92 and 93, automatic operation by a motor or the like is performed. When the seat main bodies 92 and 93 are stored, it is common to operate only while the user operates the operation switch for safety reasons, and the user confirms safety. It is necessary to continue the operation until the seat bodies 92 and 93 reach the seating position or the storage position (Patent Document 3).
JP 2004-196163 A JP 2004-249964 A Japanese Patent Laid-Open No. 2004-249962

  However, it takes a relatively long time for the seat body to move between the seating position and the storage position, and it is difficult to determine from the appearance whether the seat body or the storage position has been reliably reached. Therefore, the user sometimes interrupted the operation before the seat body surely reached the seating position or the storage position. If it is not moved securely to the seating position, or if it is not moved securely to the storage position, the top surface at the storage position will not be horizontal, and the appearance and usability will be reduced. It was hard to say.

  The present invention has been made in view of the above circumstances, and it is an object to be solved to provide a seat device that is storable and has excellent operability.

(1-1) The seat device of the present invention includes a seat body including a seat cushion capable of facing the user's buttocks and a seat back capable of facing the user's back;
A seat position moving device that can move between the seating position and the storage position by moving the seat body;
And a control unit that includes an operation unit that generates an operation signal by a user's operation and that operates the sheet position moving device when the operation signal is input.

(1-2) In order to solve the above problem, the control unit
A sheet position detecting means for detecting a position of the sheet body and generating a position signal;
During operation of the seat position moving device based on the operation signal, the input of the operation signal is interrupted in a state where the position of the seat body is in a predetermined range near at least one of the seating position and the storage position. In this case , the sheet main body is moved toward the one position regardless of whether or not the operation signal is input.

(1-3) In addition, the control unit performs the operation when the sheet main body reaches a predetermined range near the one position only when the sheet main body is moved toward the one position. The sheet body can move toward the one position regardless of whether or not a signal is input.

(1-4) That is, when the seat main body is close to the seating position or the storage position, it is considered that there is almost no possibility of occurrence of unexpected pinching between the seat main body and the floor. Henceforth, it was considered that the movement of the seat body can be continued even when the user's monitoring is interrupted. Therefore, after that, the seat body is automatically moved to the seating position or the storage position regardless of the operation of the user.

(2) By the way, the possibility that the seat position detecting means for detecting whether or not the seat main body has reached the seating position or the storage position cannot malfunction can not be completely excluded.

  Therefore, for the purpose of realizing a more reliable movement of the seat body, the control unit determines the seat position for a predetermined time after detecting that the seat body has moved to the seating position or the storage position based on the position signal. The mobile device can be activated.

  By operating the seat position moving device for a while after it is determined that the seat body has reached the seating position or the like, the influence of malfunction of the seat position detecting means can be almost eliminated. Here, the “seat position detecting means” is a means for detecting the position of the seat body by some method. In addition to means for directly measuring the position of the seat body with an encoder or the like, the seat body is set to a seating position or the like. It may be a means for detecting the position by detecting the locked state, or a means for estimating the position from the operation amount, time, applied load amount, etc. of the seat position moving device that drives the seat body.

(3) Further, when the control unit detects that the seat main body has reached the one position based on the position signal so that the user does not interrupt the operation before reaching the seating position or the like. Informing means for informing the user that the sheet body has reached the one position can be provided. The position of the seat body can be easily identified by the notification means, and the user can perform the operation accurately.

  The seat device of the present invention will be described in detail based on the following embodiments. The seat device of the present embodiment includes a seat body, a seat position moving device, a control unit, and other means that are employed as necessary. The seat body includes a seat cushion and a seat back. The seat cushion is a member that can face the user's buttocks. The seat back is a member whose front surface can face the back of the user. The seat back is pivotally provided in the vicinity of the lower end portion thereof and in the vicinity of the rear end portion of the seat cushion so as to be swingable in the front-rear direction. The front surface of the seat back is positioned so as to substantially contact the seat surface of the seat cushion, and can swing to a table position where the back surface is substantially horizontal. In that case, the back of the seat back can be used as a table. Here, it is also possible to move the seat back from a table position almost overlapping the seat cushion to a position close to 180 °.

  The seat body is movable between a seating position where a user can sit and a storage position such as a storage space provided on a floor or the like. For example, the link mechanism can move between the two. The seat body preferably includes a lock device that is fixed to the floor or the like when the seating position is reached.

  The seat position moving device is means for moving / switching the position of the seat body between the seating position and the storage position. It can be realized by an electric motor or the like.

  The control unit includes an operation unit and a sheet position detection unit. The operation unit is means for generating an operation signal by a user operation. For example, an automatic return type push button may be used. In order to move the operation unit with respect to the seating position and the storage position, one dedicated switch may be provided, or one switch may also be used. When one switch is also used, a method of reversing the moving direction of the sheet body each time the switch is turned on / off can be adopted.

  The sheet position detecting means is means for detecting the position of the sheet main body by some method and generating a position signal. For example, in addition to means for directly measuring the position of the seat main body with an encoder or the like, the means for detecting the position by detecting the state in which the seat main body is locked at the seating position or the like, or driving the seat main body Means for estimating the position from the operation amount, time, applied load amount, etc. of the seat position moving device can be mentioned. Furthermore, when the seat body includes a lock device, it is desirable to include a sensor that detects that the seat body is locked.

  The control unit is means for controlling the sheet position moving device based on the operation signal and the position signal.

(A) The seat position moving device operates the seat position moving device when the user operates the operation unit. When the seat body reaches a predetermined range in the vicinity of at least one of the seating position and the storage position (especially the seating position is desirable), it is automatically performed regardless of whether the operation switch is operated. Move the seat body.

Here, after operating the operation unit in an attempt to move the seat body from either the seating position or the retracted position, the operation is immediately interrupted and the seat body remains in the predetermined range. The seat position moving device is actuated to return.
After operating the operation unit in order to move the seat body, if the seat body remains in the specified range immediately after the operation is stopped, the seat position moving device is operated so as to return to the original seating position. become.

  The size of the predetermined range is appropriately determined depending on the sheet device actually applied. For example, the state where the movement of the sheet main body is almost completed may be selected, or the position from a position substantially before the position of the final movement to the position may be set large. It is desirable that the predetermined range is determined in consideration of safety such as preventing unexpected things from being sandwiched between the seat body and the floor.

(B) Further, the control can be changed according to the direction in which the sheet main body moves while the operation signal is input.

  Here, there are at least two seat movement positions as the intended movement directions of the seat body in the apparatus. When moving toward at least one of the two directions, the operation switch is operated when the position of the seat body reaches a predetermined range in the vicinity of the target position (sitting position or storage position). The seat body can be moved automatically regardless of the presence or absence.

  For example, when the seat body is moved from the retracted position toward the seating position, the seat body only when the seat body position is within a predetermined range in the vicinity of the seating position, regardless of the subsequent operation of the operation unit. Movement (movement toward the sitting position) can be continued.

And, as if the operation of the operation unit was interrupted immediately, the operation of the operation unit was interrupted because the moving direction of the sheet main body is reversed even when the sheet main body is still within a predetermined range near the storage position. Also, the movement toward the seat body storage position (the direction to return to the original position) is not performed.
When the seat body is moved, the movement of the seat body is stopped when it is detected from the position signal that the seat body has finally reached the seating position or the storage position. In order to move the sheet main body to the target position more reliably (for example, when the sheet position detecting means malfunctions for some reason), the control unit further determines that the sheet main body has reached the target position by the position signal. Even after the detection by the signal, the sheet position moving device can be operated for a predetermined time. In order to determine whether or not the sheet position has reached the target position, a sensor that detects whether or not the above-described locking device is locked may be used as the sheet position detection means. Although it does not specifically limit as predetermined time, About several to ten and several seconds are desirable.

  Furthermore, it is desirable that the control unit includes notifying means for notifying the user that the seat main body has reached the position when the position of the seat main body reaches the seating position or the storage position based on the position signal. . Examples of the notification means include a means for appealing to hearing such as a buzzer, a means for appealing to vision such as lighting of a lamp, and a means for appealing to tactile sensation such as generation of vibration.

(Constitution)
As shown in FIG. 1, the seat device includes a seat body 1 having a seat cushion 2 and a seat back 3. The seat back 3 is pivotally supported by the rear end portion of the seat cushion 2 so as to be swingable at the lower end portion. The seat back 3 can be tilted forward to a position substantially overlapping with the seat cushion 2 as shown by the broken line in FIG. In this way, the back surface of the seat back 3 can be used as a table at the position where it is tilted forward (the position indicated by the broken line on the left in FIG. 1).

  The position indicated by the solid line in FIG. 1 (left side of the drawing) is a seating position where the user can sit. On the other hand, the position indicated by the broken line in FIG. 1 (the right side of the drawing) is the storage position where the seat body 1 is stored in the storage space 15 on the floor.

  The seat back 3 and the seat cushion 2 are a device that prevents free swinging due to external force (not shown), a seat cushion motor 402 that swings the seat cushion 2, and a seat back 3 that swings. The seat back motor 400 (FIG. 3) is provided.

  The seat cushion 2 includes a seat cushion frame (not shown) on the bottom surface, and the seat cushion frame includes a pair of left and right front legs 9 and rear legs 10. The front leg 9 and the rear leg 10 are provided with latches 7 and 8 which can be engaged with strikers 5 and 6 projecting from the floor 4 of the vehicle, respectively. The seat cushion 2 is supported and fixed to the floor 4 by the latches 7 and 8 engaging with the strikers 5 and 6.

  Supporters 11 are pivotally supported on the lower surfaces of the left and right sides of the seat cushion 2. The supporter 11 constitutes a pair of links 12, 13, that is, a four parallel link. One end of the first link 12 is supported by a pivot point 14 of a seat cushion frame provided on the lower surface of the seat cushion 2, and the other end of the first link 12 is supported by a pivot point 16 in the seat storage space 15. One end of the second link 13 is fixed to the rear leg 10, and the other end of the second link 13 is supported by a pivot point 17 in the seat storage space 15.

  The pair of rear legs 10 are supported by the seat cushion frame via a shaft 18 so as to be swingable. The shaft 18 is rotated by a seat storage motor 19 as a seat position moving device held by the seat cushion frame, so that the position of the seat body 1 can be switched and moved between the seating position and the storage position.

  The seat storage motor 19 is controlled by the ECU 600 (FIG. 3). When the shaft 18 is rotated by the seat retracting motor 19, the rear leg 10 fixed to the shaft 18 and the second link 13 fixed to the rear leg 10 are swung with respect to the seat cushion 2. The shaft 18 is provided with a seat position sensor 302 (seat position detecting means: FIG. 3) that is a rotary encoder that supplies an angle signal to the ECU 600, so that the angle between the shaft 18 and the seat cushion 2 can be measured. Yes.

  The front leg 9 is pivotally supported at a pivot point 21 so as to be swingable with respect to the seat cushion frame. A bracket 20 is fixed to the shaft 18. The bracket 20 and the lower part of the pivot point of the front leg 9 are connected by a stranded wire cable 22. The front leg 9 is urged clockwise as viewed in FIG. 1 by a spring (not shown), but its movement is restricted by the stopper 24. The front leg 9 swings in accordance with the swing of the blanket 20, that is, the rear leg 10 by the twisted cable 22 and the spring.

  The locking device 7 of the front leg 9 includes a seating lock detection switch 27 that outputs that the locked state shown in FIG.

  The control unit is realized as a logic on ECU 600. The ECU 600 includes an operation switch 100 for switching the seat body 1 between the storage position and the seating position, a seatback operation switch 102 as a seatback fine adjustment operation unit for finely adjusting the angle of the seatback 3, a seating position and a table position. Connected are an auto-actuation operation switch 104 as an operation section for switching the angle of the seat back 3 between, a headrest operation switch 106 for finely adjusting the position of the headrest, and a seat slide operation switch 108 for finely adjusting the front / rear and vertical positions of the seat cushion 2 Then, operation signals from the respective switches are supplied.

  A seating lock detection switch 27 for detecting that the front legs 9 and the rear legs 10 of the seat body 1 and the latches 7 and 8 of the rear leg 10 are engaged with the strikers 5 and 6, respectively, and a storage signal when the seat body 1 is in the storage position. Is connected to the storage switch 33. In addition, a seat back position sensor 300 that detects the angle of the seat back, a seat cushion position sensor 302 that detects the position of the seat body 1 such as a storage position and a seating position, a headrest position sensor 304 that detects the position of the headrest, and the seat cushion 2 A seat slide position sensor 306 is connected to detect the position.

  The ECU 600 also includes a seat back motor 400 that adjusts the angle of the seat back 3, a seat cushion motor 402 that adjusts the position of the seat cushion 2, a lock release motor 404, a headrest motor 406 that finely adjusts the position of the headrest, and a seat slide. The sheet slide motor 408 for finely adjusting the position of the sheet and the sheet storage motor 19 for storing the sheet body 1 are controlled. The ECU 600 is connected to a start / end / alarm buzzer 500 and an alarm lamp 502. The start / end / alarm buzzer 500 can act as a notification means. In the present embodiment, the seat back motor 400 and the seat storage motor 19 are provided separately. However, the seat storage motor 19 is abolished so that the seat back motor 400 also serves as a motor for storing the seat body 1. Also good.

(Function and effect)
As shown in FIG. 4, ECU 600 detects whether operation switch 100 has been operated (S1). When the operation switch 100 is operated, the moving direction of the sheet body 1 is determined by the operation (S2).

  Thereafter, as long as the operation switch 100 is operated (S3), the sheet storage motor 19 is continuously operated (S5), and when the target position is reached, the operation of the sheet storage motor 19 is stopped (S6).

  If the operation of the operation switch 100 is interrupted in the flow of steps S3, S5, and S6 (S3), whether or not the position of the sheet body 1 is in the vicinity of the target position based on the position signal from the sheet position sensor. (S4). When the position of the sheet body 1 is in the vicinity of the target position (S4), the sheet storage motor 19 is continuously operated to the target position even if the operation switch 100 is not operated by the flow of steps S3 to S6. If the sheet main body 1 is moved to the position near the target position (S4), the process returns to S1 to determine again whether or not the operation switch 100 is operated.

  Specifically, a case will be described in which the seat body 1 is switched and moved from the storage position (FIG. 1: broken line position) to the sitting position (FIG. 1: solid line position). When the seat body 1 is in the retracted position, an operation signal is input to the ECU 600 by operating the operation switch 100 (moving to the seating position) so that the user moves to the seating position (starting the normal movement mode). ). The ECU 600 operates the seat storage motor 19. The sheet storage motor 19 operates the shaft 18. As a result, the rear leg 10 rotates counterclockwise about the shaft 18 and rotates the bracket 20 in the same direction.

  The rotation of the bracket 20 in the counterclockwise direction loosens the twisted cable 22 in the forward direction (left side in FIG. 1), and the front leg 9 is rotated clockwise around the pivot point 21 by the biasing force of the spring. Rotate.

  The seat retracting motor 19 is operated by moving the free ends of the legs 9 and 10 away from each other, and the rear leg 10 and the first link 12 integral with the rear leg 10 rotate counterclockwise around the pivot point 16. The seat body 1 is moved to the seating position indicated by the solid line in FIG. 1 by the supporter 11 of the four link mechanism. Finally, the latch 7 of the front leg 9 and the latch 8 of the rear leg 10 are locked to the strikers 5 and 6, respectively. As a result, the seating lock detection switch 27 is turned on and a position signal indicating that the locking is completed is input to the ECU 600. The case has been described where the user continues to press the operation switch 100 until the position signal indicating that the lock is completed is input to the ECU 600 from the seating lock detection switch 27.

  A case where the operation of the operation switch 100 is interrupted will be described with reference to FIG. When the user presses the operation switch 100 (a1 to a2), the operation of the sheet storage motor 19 is turned on (c1 to c2). Thereafter, when the position of the seat body 1 is not within a predetermined range near the seating position (b1), when the hand is released from the operation switch 100 (a2 to a3), the operation of the seat storage motor 19 is also turned off (c2 to c3). (FIG. 2).

  Then, when the operation switch 100 is pressed again (a3 to a4) to turn on the operation of the seat retracting motor 19 (c3 to c4), when the position of the seat body 1 reaches the seating position (b1 to b2), Thereafter, even if the user releases the operation switch 100 and the operation switch 100 is turned off (a4 to a5), the operation of the seat retracting motor 19 is kept on (c4 remains). Thereafter, when the position of the seat body 1 reaches the seating position (d1 to d2), the operation of the seat storage motor 19 is stopped (c4 to c5). Therefore, after the user moves the position of the seat main body 1 roughly to the vicinity of the seating position, the user reliably moves the position of the seat main body 1 to the seating position without particularly paying attention to whether or not the seat main body 1 is completely reached. It becomes possible to make it. Here, when the position of the seat main body 1 reaches the seating position, the start / end / alarm buzzer 500 is shortened to notify the user that the position of the seat main body 1 has been reliably moved to the seating position. .

  Here, as a method for controlling the operation of the sheet storage motor 19, there is a method of continuing the operation of the sheet storage motor 19 for a predetermined time when shifting from c4 to c5 shown in FIG. 5 (that is, the position of the sheet main body 1). After detecting that the seat has reached the seating position (d1 to d2), the operating state of the seat retracting motor 19 is shifted from the operating state of c4 to the stopped state of c5. Continue). As a result, even if the information that the position of the seat body 1 has reached the seating position due to some malfunction is input, the seat body 1 can be reliably brought to the seating position. On the other hand, when operating from the seating position toward the storage position, similarly, when the vicinity of the storage position is reached, the subsequent operation can be shifted to the automatic movement mode to ensure movement.

  As described above, the description has been given based on the case where the seat body 1 is moved from the storage position toward the seating position. A similar control method can be adopted only by changing the positional relationship, and the sheet body 1 can be reliably moved by this control method.

(Modification)
The seat device of the present modification has the same configuration as the seat device of the embodiment except that the control logic of the ECU 600 is different. A control method of ECU 600 will be described with reference to FIG. When the operation switch 100 is operated (S11), the moving direction of the sheet body 1 is determined in the direction corresponding to the operation of the operation switch 100 (S13).

  On the contrary, when the operation switch 100 is not operated (S11), it is determined whether or not the position of the seat body 1 is within a predetermined range (near the seating position or the storage position) (S12). If it is within the predetermined range, the direction corresponding to the predetermined range (the direction toward the seating position if near the seating position and the direction toward the storage position if near the storage position) is determined as the movement direction (S14). If the position of the sheet body 1 is not within the predetermined range, the process returns to S11 (S12).

  When the movement direction of the sheet body 1 is determined, the sheet storage motor 19 is operated so as to move in that direction (S15). If the position of the sheet body 1 has not reached the target position, the process returns to S11 and further control is continued.

  In the present modification, unlike the embodiment, when the operation of the operation switch 100 is interrupted when the position of the sheet body 1 is within a predetermined range, the sheet body 1 is moved in a direction according to the predetermined range regardless of the previous moving direction. Thus, the sheet storage motor 19 is operated. Therefore, when the operation switch 100 is operated for a short time at the initial stage of the operation, the position of the sheet main body 1 can be returned to the original position even if the operation is interrupted thereafter.

It is the schematic diagram which showed a mode that the seat apparatus of an Example moved between a seating position and a storing position. It is the schematic diagram which showed the mode that the seat apparatus of an Example was moving between the seating position and the storing position. It is a block diagram of the control part of the sheet | seat apparatus of an Example. It is a flowchart explaining the control method of the action | operation of the sheet storing motor in the seat apparatus of an Example. It is a method for controlling the operation of the sheet storage motor in the seat device of the embodiment. It is a flowchart explaining the control method of the action | operation of the sheet storing motor in the sheet | seat apparatus of a modification. It is a figure which shows the outline of the conventional seat apparatus which can be stored.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle seat 2 ... Seat cushion 3 ... Seat back 4 ... Floor 5, 6 ... Striker (locking device)
7,8 ... Latch (lock device)
9 ... Front leg (base member)
DESCRIPTION OF SYMBOLS 10 ... Rear leg 11 ... Supporter 12, 13 ... Link 14, 16, 17 ... Pivoting point 18 ... Shaft 20 ... Bracket 22 ... Twisted wire cable

Claims (4)

A seat body comprising a seat cushion capable of facing the user's buttocks and a seat back capable of facing the user's back;
A seat position moving device that can move between the seating position and the storage position by moving the seat body;
A control unit that includes an operation unit that generates an operation signal by a user operation, and that activates the sheet position moving device when the operation signal is input;
The controller is
A sheet position detecting means for detecting a position of the sheet body and generating a position signal;
During operation of the seat position moving device based on the operation signal, the input of the operation signal is interrupted in a state where the position of the seat body is in a predetermined range near at least one of the seating position and the storage position. In this case , the sheet device is operated so as to move the sheet main body toward the one position regardless of whether the operation signal is input.   When the sheet main body reaches the predetermined range near the one position from the other position side, the control unit directs the sheet main body to the one position regardless of whether or not the operation signal is input. 2. The seat device according to claim 1, wherein the seat device is operated so as to move.   3. The seat device according to claim 1, wherein the control unit operates the seat position moving device for a predetermined time after detecting that the seat main body has moved to the seating position or the storage position based on the position signal. .   The control unit notifies the user that the seat main body has reached the one position when detecting that the seat main body has reached the seating position or the storage position based on the position signal. The sheet apparatus according to claim 1, further comprising a notification unit.

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