JPH0551490B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power seat folding control device. The device according to the present invention is used, for example, when folding up the last seat of a wagon (one-box vehicle) to create a luggage storage space.

[Prior art and problems to be solved by the invention]

In recent years, seat slides,
Reclining and other functions are now electric, reducing the inconvenience for drivers and passengers.

On the other hand, electric wagons (one-box vehicles) have not yet been electrified, and especially when folding the last seat to create a luggage storage space, it is necessary to manually pull and pull the operating lever. The locking mechanism of the seat to the floor was released, and the seat was then rolled. However, in the folding operation of the seat bag that is performed immediately before the rolling operation, the seat bag is freely folded further forward from the front limit position of reclining. In this way, during the folding operation, the angular position of the seat bag is not maintained accurately, so if the locking mechanism is to be interlocked with the seat bag using a wire or the like, the operation of the locking mechanism may be difficult. There was a problem that it became unstable.

The present invention has been made in order to solve such technical problems, and greatly reduces the annoyance of the driver and passengers regarding the above-mentioned seat folding operation. In addition to making it possible to conveniently perform the folding operation, it is also possible to stably operate the lock mechanism that is driven in conjunction with the folding operation.

[Means for solving problems]

In the present invention, there is provided an operation switch discriminating means for receiving a command from an operating switch for selecting a seat operation and discriminating the operating switch command, and receiving a signal from the operating switch discriminating means and a signal from a seat back folding sensor to determine the seat back folding state. a seat back folding drive section that receives a seat back folding driving command from the seat back folding determining means and performs a seat back folding drive; a seat back folding drive section that receives a signal from the seat back folding determining means and a signal from a seat rolling sensor; Seat rolling determination means for determining a seat rolling state; a seat rolling drive section that receives a seat rolling drive command from the seat rolling determination means and performs sheet rolling drive; and a drive in the seat back folding drive section. A power seat folding control device is provided, comprising: a locking mechanism that locks or unlocks the seat from the vehicle body in conjunction with the seatback folding drive unit by sharing a power source.

〔Example〕

A power seat folding control system according to one embodiment of the present invention is shown in FIG. 1A. A functional block diagram of the apparatus of FIG. 1A is shown in FIG. 1B. In the seat arrangement of a wagon (one-box vehicle) W, a front seat 1, a middle seat 2, and a rear seat 3 are provided. In addition to various adjuster functions that can generally adjust the seat shape to suit the passenger, the front seat 1 has a full-flat function, the middle seat 2 has a full-flat function and a facing function, and the rear seat 3 has a full-flat function and a luggage function. ing. An operation switch 5 is provided on the side of the front seat 1.

The broken lines in FIG. 1A indicate the fully flat state of each sheet. Figure 2 shows the process of folding the last seat. FIG. 3 shows a situation where the rearmost seat 3 is in the luggage position.

An electric luggage mechanism used in a wagon or the like having the above-mentioned configuration will be described below.

Normally, to put the vehicle in the luggage state, the headrest 31 is lowered to its lower limit so that it touches the seat bag 32, or after the headrest 31 is removed,
After raising the seat back 32 to the front limit around the reclining rotation shaft 324, the seat back 32
is folded forward about the rotating shaft 33 when it is placed in the luggage state, and the backrest surface 321 of the seat bag 32 and the seat surface 341 of the seat cushion 34 are brought into contact. Finally, the lock mechanism 35 that locks the rear part of the seat cushion to the floor is removed and the entire seat is rolled, resulting in the luggage condition shown in FIG. 3.

Here, in order to significantly reduce the troublesomeness of the convolution operation, the raising and lowering operation of the headrest 31,
The reclining and folding operations of the seat back 32, the rolling operation of the seat cushion 34, and the locking mechanism 35 for locking or unlocking the seat to the floor surface 41 are all electrically powered.

The lock mechanism 35 also uses the drive source for the folding operation of the seat bag (that is, the drive motor 331) as its drive source, so that the lock mechanism is locked or unlocked in conjunction with the folding drive of the seat bag. Ru. Therefore, depending on the operating position of the drive source (drive motor 331), the angular position of the seat bag can be reliably held and set to the folding completion position, and therefore, even in such an interlocking format, the lock mechanism is It can operate stably. Moreover, by adopting such a shared format, it is possible to save space for the drive source.

The mechanism for rolling the entire sheet is described below.

FIGS. 4 and 5 are views showing an example of a mechanism for rolling the entire seat, as seen from the side and above with the skin of the seat cushion removed. However, in FIG. 5, the seat bag and seat cushion are shown separated.

The seat cushion frame 342 has a mounting portion 342 to which the stay of the reclining mechanism is attached.
1, and a mounting stay 42 fixed to the floor surface 41
Leg 3422 rotatably supported on one end 421 of
Consists of. The lock mechanism 35 that can fix the seat to the floor surface 41 is constructed by a known mechanism, and by rotating the lock claw 354, it can be locked with the lock bar 355 fixed to the floor surface 41. It is said that

The lock pawl 354 can be rotated by operating the wire 352 inside the outer wire 351.
If you pull 2 in the direction of arrow RA1, the lock will be released.
When loosened, the spring in the locking mechanism 35 pulls the wire 352 and locks it. Further, the wire 352 is connected to the folding movement of the seat bag by, for example, connecting one end of the wire 352 to the seat bag. When the seat bag is folded, the wire 352 is pulled, the lock is released, and the seat bag is folded. When the wire 352 is opened, the wire 352 is loosened and locked.

The seat rolling mechanism 36 includes a drive motor 361, a speed reduction mechanism 362, a power link 363, a joint link 364, and a drive shaft 365. The rotational force of the drive motor 361 is transmitted through the reduction mechanism 362.
The power is increased through the power link 363, and the shaft 3
Rotate around 66. A known reclining mechanism can be used as the deceleration mechanism 362.

One end 3641 of the joint link 364 is rotatably supported by the power link 363 by a pin 3671, and the other end 3642 is rotatably supported by the attachment stay 42 by a pin 3672. or,
The drive shaft 365 transmits the rotation of the motor to the reduction mechanism on the opposite side.

Rotate the motor 361 and power link 363
When the motor 361 is rotated in the direction of arrow AR2, the seat rolls in the direction of arrow AR3 about the pin 368, and when the motor 361 is reversed, the seat also rolls in the opposite direction.

With the above configuration, the luggage state can be easily set by operating the operation switch 5 to operate each component in order.

The apparatus shown in FIG. 1A is provided with a control circuit 6 that receives signals from the operation switch and each position detection sensor and performs predetermined calculations. A microcomputer type control circuit is used as the control circuit. Inputs to the control circuit 6 include a headrest sensor 315 that detects the vertical position of the headrest 31, a reclining sensor 335 that detects the reclining angle of the seatback 32, a seatback folding sensor 325 that detects the folding angle of the seatback, and a seat rotation sensor 335 that detects the reclining angle of the seatback 32. These are signals from the seat rolling sensor 365, which detects the movement angle, and the operation switch 5, which determines whether the vehicle is in the luggage or normal state.

Note that the operation switch 5 naturally has functions of adjusting the headrest position and reclining position. The operating switch 5 is shown in Fig. 1A.
Although it is shown as being attached to the side of the front seat 1, it is not necessarily limited to this position, and other suitable positions can be chosen. Further, each adjustment switch may be separately provided near the seat to be adjusted. Further, as each of the above-mentioned sensors, a conventional type that picks up the rotation of the motor with pulses, a type that uses a limit switch, etc. can be adopted.

The flow of operation of the control circuit 6 is shown in FIG.
In the flowchart of FIG. 6, only the luggage operation is shown, and other manual operations such as lifting and lowering the headrest and before and after reclining are omitted.

S101; If luggage is selected with the operation switch, proceed to S102; otherwise, proceed to S1
Proceed to step 14.

S102: If the headrest is at the lower limit position, S1
If not, proceed to S106.

S106; Rotate the headrest drive motor,
Lower the headrest.

S107; If the headrest has reached the lower limit position, proceed to S103; otherwise, return to S106.

S103: If the recline is at the front limit position, proceed to S104; otherwise, proceed to S108.

S108; The reclining drive motor is rotated to operate the reclining in the forward direction.

S109: If the reclining reaches the front limit position, proceed to S104; otherwise, return to S108.

S104; If the seat back folding is in the completed position, proceed to S105, otherwise proceed to S110
Proceed to.

S110: Rotate the folding drive motor to perform folding operation.

S111; When the folding reaches the completed position, S1
If not proceed to S110.

S105; If the sheet rolling is at the completed position, S10
1, otherwise proceed to S112.

S112; The seat rolling drive motor is rotated to cause the seat to roll.

S113; When the sheet rolling reaches the completion position, S113;
If not, return to S112.

This completes the luggage operation.

S114; If the seating state (normal state) is selected with the operation switch, proceed to S115,
Otherwise, the process returns to S101.

S115; If the sheet rolling is at the start position, S11
If not, proceed to S117.

S117; The seat rolling drive motor is rotated to restore the seat rolling.

S118; When the sheet rolling reaches the starting position, S118;
Proceed to S116, otherwise return to S117.

S116; If folding is at the start position, S101
If not, proceed to S119.

S119; The folding drive motor is rotated to perform the folding return operation.

S120; If the folding reaches the starting position, S1
If not, return to S119.

With this, the seating operation (normal state) is completed.

In the flowchart of FIG. 6, when lowering the headrest (S102, S106, S107),
When operating the recline to the front limit (S10
3, S108, and S109) may be reversed in order. Furthermore, it is clear from the flowchart that the seat does not operate even if normal is selected with the operating switch in the normal state, or luggage is selected with the operating switch in the luggage state.

Other examples of sheet drive mechanisms are shown in FIGS. 7-18.

In the example described above, the seat was rolled using the rotational force of the motor using a link, but in the example shown in FIG. 7, a cogged belt 371 is used instead of the link. The mechanism shown in FIG. 7 includes a cogged belt 371 driven by the output shaft after deceleration of the motor 361, and a stay 4 fixed to the floor.
It has a gear 372 fixed to 2. Therefore, by rotating the motor 361, the seat cushion 342 rolls. Note that in addition to the cogged belt, a chain, wire, etc. may be used.

In the mechanisms shown in Figures 4 and 7, the drive motor is attached to the seat frame cushion;
Although it is located far from the center of seat rotation, this is because there are generally suspension components under the floor near the center of seat rotation, so the motor should be installed without protruding below the floor. This is because it is difficult to
However, if there is sufficient space under the floor, a drive motor may be installed near the center of rotation to directly rotate the seat.

In the examples shown in FIGS. 8 to 13, 1
The two drive motors operate not only a mechanism that rolls the seat, but also a mechanism that moves the front part of the seat cushion up and down. In this case, the upper and lower front portions of the seat cushion are used when they are fully flat.
The reason for this is that to improve seating comfort, the front of the seat cushion is generally higher than the rear, and when the seat is fully flat, the seat cushion is slanted, making the ride less comfortable. This is to improve ride comfort by lowering the front part of the seat cushion when fully flat.
This is a known mechanism.

In the examples shown in FIGS. 8 to 13, one motor performs the function of rolling the seat and the function of raising and lowering the front portion of the seat cushion.

FIG. 8 is a side view of the seat cushion with the skin etc. removed, FIG. 9 is a partial partial view of the front view of FIG. 8, and FIG. 10 is a sectional view taken along line XX in FIG. 9. 1st
FIG. 1 is a sectional view taken along line XX when the front portion of the seat is at the lower limit. FIG. 12 is a perspective view of link 3500. FIG. 13 is a perspective view of lock lever 3620.

Lock mechanism 35 that can fix the seat to the floor surface 41
is the same as the locking mechanism in the previous example,
Via the wire, the seat bag is folded and released when the seat bag is folded.

The mechanism shown in FIGS. 8 to 13 includes a drive motor 3200, a deceleration mechanism 3300, an output shaft after deceleration, an A link 3400 that rotates, and a support shaft 3510 that is rotatably connected to the seat cushion frame 3000.
B-link 3500, B-link 3 which is pivotally supported by
500, and one end thereof 35
21 is pivotally supported by the A link 3400.
0, a lock lever 3620 that rotates around a support shaft 3610, a wire 3630 that operates the lock lever 3620, a spring 3640 that biases the lock lever 3620 clockwise in FIG. 10, and a stay 3700 that is fixed to the floor 41. do.

A link 3400 rotates around the output shaft of deceleration mechanism 3300, which is coaxial with support shaft 3510.
The B link 3500 has a shape as shown in FIG.
It passes through 2. Both ends 3511 of the support shaft 3510
and 3512 are holes 3501 and 3 of B link 3500
501 and also passes through the long holes 3711 and 3712 provided in the stay 3700.
It protrudes on both sides of 700.

Elongated holes 3711 and 3712 are lock mechanisms 3100
The lock mechanism 31 is shaped like an arc centered around the lock lever 3110 that fixes the
Even if the front part of the seat cushion is moved up and down with 0 locked, both ends 3511 and 351 of the support shaft 5310
2 slides smoothly within the elongated holes 3711 and 3712. The shaft 3520 is the hole 3503 of the A link 3500
and 3504, and one end 3522 passes through an elongated hole 3722 provided in the stay 3700 and protrudes from the stay 3700. Axis 3
The other end 3521 of the stay 3700 is pivotally supported by the A link 3400 after passing through the elongated hole 3721 of the stay 3700.

The lock lever 3620 has the shape shown in FIG.
B lock lever 3622 that locks the side, and A
Lock lever 3621 and B lock lever 3622
It consists of a pipe 3623 that connects the

A stay 3624 for fixing one end of the wire 3630 and one end of the spring 3640 is provided in a part of the pipe 3623. wire 36
30 has one end 3631 connected to the stay 3624, and after passing through the guide 3730 of the stay 3700, the one end 3632 is connected to the fixed outer wire 36.
It is guided within 33.

For this reason, wire 3630 is connected to arrow AR in FIG.
When the vehicle is pulled in the five directions, the A lock lever 3621 and the B lock lever 3622 rotate counterclockwise in FIG. The wire 3630 is interlocked with the folding of the seat bag and loosens when the seat bag is folded.

The operation of the mechanism of FIGS. 8-13 will now be described.

First, when placing the vehicle in the luggage state, the headrest is lowered, the vehicle is reclined, and the seat back is folded, as in the previous embodiment. The lock 3100 is then released and the lock lever 3620 is in the state shown in FIG. After this, the motor 3200 is rotated, and the link A3400 and the eighth
Turn it counterclockwise. However, A link 3
400 is prevented from rotating by the lock lever 3620, the seat cushion frame 3000 to which the speed reduction mechanism 3300 is fixed will roll.

If you want to return to normal from luggage, do the opposite.

Next, we will explain the case of full-lattice. Since the seat back is not folded, the lock mechanism 3
100 is locked. Further, the lock lever 3620 is in the state shown in FIG. Thereafter, the headrest is lowered, the reclining is operated to the rear limit, and then the motor 3200 is rotated to rotate the A-link 3400 counterclockwise. This time, the rotation of the A-link 3400 is not prevented, so the support shaft 3520 slides in the elongated holes 3721, 3722, and the support shaft 3510 slides in the elongated holes 3711, 371.
2 to the state shown in Fig. 11. Therefore, the seat cushion frame 3000 is
It rotates clockwise in FIG. 8 around 110 and descends.

To return to the normal state, perform the operation opposite to that described above.

The mechanisms shown in Figs. 8 to 13 can also be provided with a position detection sensor and a control device that operates each mechanism according to inputs from the position detection sensor and the operation switch, but the flowchart is similar to the above case. Since they are almost the same, detailed explanation will be omitted.

In the above, we have explained the luggage mechanism of the type in which the rearmost seat is integrated, but there are other types, for example, the rearmost seat currently on the market is divided in the middle, and when it is used as luggage, it can be folded and moved to the left and right. This mechanism can be easily installed in a type in which a luggage space is formed, or in a type in which not only the rear seat but also the middle seat has a luggage function.

The drive motor used in the luggage mechanism is relatively large because it must roll the entire seat. Therefore, by attaching an auxiliary spring, the load on the motor can be reduced and a smaller motor can be used.

FIG. 14 shows the configuration when an auxiliary spring is attached. Two springs are used, and each spring has a different role. Figure 14 The characteristics of the mechanism are shown in Figure 15. The winding centers of the A spring 3804 and the B spring 3805 are attached to the winding shaft 3803 of a stay 3802 connected to the mounting stay 3801 of the speed reduction mechanism 3800. Further, the outer end is hooked onto a shaft 3806, which is a pin extending vertically upward from the plane of the paper. B spring 3805 is
In the state shown in Fig. 14, that is, in the normal state, it is most biased, and in the luggage state, there is no biasing force, and A
The spring 3804 is attached so that it has no biasing force in the state shown in FIG. 14 and is most biased in the luggage state.

The force relationships in the Figure 14 mechanism are shown in Figure 15.

In FIG. 15, the vertical axis indicates the magnitude of torque, and the horizontal axis indicates the state of the seat and the angle. 1
The dashed dotted lines F11 and F12 are the torque characteristics required to lift the entire seat, and as you lift it from the normal state, the required torque gradually decreases, reaching 0 midway through, and then the force required to lift it is reversed. The power is maximum in the luggage state.

A two-dot chain line F21 indicates the characteristics of the A spring 3804, and a two-dot chain line F22 indicates the characteristics of the B spring 3805. Broken lines F31 and F32 indicate A spring 3804 and B spring 3.
Shows the combined power of 805. Here, if we assume that the force acting in the rotational direction is positive and the force acting in the opposite direction is negative when placing the luggage in the luggage state, then F11 and F32 are positive, F12,
F13 is negative. Therefore, when all these forces are combined, solid lines F41 and F42 are obtained, with F41 being positive and F42 being negative. Compared to before installing the spring, the required maximum torque is reduced, and the drive motor can be made smaller accordingly.

As a modification of the above-described embodiment, it is possible to further include an execution state determining means for determining whether the execution state of the luggage operation is good or bad. The sensors used in the execution state determination means include (1) vehicle speed sensor, (2) object detection sensor near the seat, (3) emergency stop switch, (4) load detection sensor, (5) seat state detection sensor, ( 6) There is an engine rotation detection sensor, etc.

(1) The vehicle speed sensor is used to disable the seat while the vehicle is running, as it is not desirable for safety to operate the seat while the vehicle is running.

(2) The object detection sensor near the seat is used to disable the seat when there is luggage or a person within the seat operating range. , ultrasound, etc.

(3) The emergency stop switch is used when the user wants to stop the seat operation for some reason.

(4) Load detection sensors are used to stop seat operation when a force acts to prevent seat operation, and include current detection circuits, pressure sensors, etc.

(5) The seat condition detection sensor stops the luggage operation if another seat is within the operating range when the luggage operation is performed.

(6) The engine rotation detection sensor is used to prevent battery build-up, but the ignition key may be used instead.

The operation flow when using the sensor for the execution state determining means is shown in the flowcharts of FIGS. 16 to 18.

S201: If there is an input from any one or a plurality of the execution state determination sensors or a combination of them, and if they are inoperable, return to the start. If there is no input, the process advances to S202.

S202; If luggage is selected with the operation switch, proceed to S203, otherwise proceed to S20
Proceed to step 8.

S203: Carry out luggage operation in the order shown in FIG.

S204: If there is an input from any one or a plurality of the execution state determination sensors or a combination of them, and the sensor is inoperable, the process advances to S206. If there is no input, the process advances to S205 and the luggage operation is intermittent.

S205: When the sheet state detection sensor detects that the luggage operation has been completed, the process returns to S201. Otherwise, the process returns to S203.

S206; Stop the operating motor.

S207; Issue a warning.

S208; If normal is selected with the operation switch, proceed to S209, otherwise proceed to S20
Return to 1.

S209: Perform normal operations in the order shown in FIG.

S210: If there is an input from any one or a plurality of the execution state determination sensors or a combination of them, and they are inoperable, the process advances to S206. If there is no input, the process advances to S211 and normal operation is interrupted.

S211: When the seat state detection sensor detects that the normal operation has ended, the process returns to S201. Otherwise, the process returns to S209.

As shown in the above flowchart, if a signal indicating that operation is disabled is input from at least one of the execution state determination sensors, the operation will be disabled before operation, and the operation will be disabled during operation. will stop the operation and issue an alarm.

Other control methods include, for example, as shown in Fig. 17, when a load is detected by a load detection sensor, such as when a load or a person is caught, the operating motor is reversed by a set amount. The interlacing may be canceled.

Further, as shown in FIG. 18, if other seats are within the luggage operation range, the luggage operation may be performed after the other seats are operated outside the luggage operation range. By providing the execution state determining means in this way, various control methods can be employed.

〔Effect of the invention〕

According to the present invention, it is possible to conveniently fold the seat and thereby create a luggage room without bothering the driver and passengers regarding the folding operation of the seat. Furthermore, by sharing the drive source for folding the seat bag as the drive source for the lock mechanism that locks or unlocks the seat from the vehicle body, the lock mechanism is operated stably in conjunction with the folding drive of the seat bag. Moreover, it is possible to save space for the drive source.

[Brief explanation of drawings]

FIG. 1A is a diagram showing a schematic configuration of a power seat folding control device as an embodiment of the present invention.
Figure B is a diagram showing the functional blocks of the device shown in Figure 1A, Figure 2 is a diagram explaining the folding process of the rearmost seat in the equipment shown in Figure 1A, and Figure 3 is a diagram showing how the luggage space is expanded by folding the rearmost seat. FIG. 4 is a side view showing the seat mechanism; FIG. 5 is a plan view of the seat mechanism shown in FIG. 4 in a fully flat state; FIG. 6 is a side view showing the seat mechanism. Figure 1 is a flowchart showing the operation flow of the control circuit in the device, Figures 7 to 14 are all diagrams showing other examples of the configuration of each part of the seat mechanism, and Figure 15 is a flowchart showing the operation flow of the control circuit in the device. Characteristic diagram showing the characteristics,
16 to 18 are flowcharts showing the operation flow when using a sensor for the execution state determining means. 1...front seat, 2...middle seat, 3...last seat,
3... Head rest, 32... Seat back, 3
3...Folding rotation shaft, 34...Seat cushion, 35...Lock mechanism, 36...Seat rolling mechanism, 41...Floor surface, 5...Operation button, 6...Control circuit, W...Vehicle .

Claims (1)

[Scope of Claims] 1. An operation switch discriminating means for receiving a command from an operation switch for selecting a seat operation and discriminating an operation switch command; A seat back discriminating means for receiving a signal from the operation switch discriminating means and a signal from a seat back folding sensor. Seat back folding determination means for determining the folded state; a seat back folding drive unit receiving a seat back folding drive command from the seat back folding determination means and driving the seat back to fold; a signal from the seat back folding determination means and a signal from a seat rolling sensor. a seat rolling determining means for determining a seat rolling state, a seat rolling drive section receiving a seat rolling drive command from the seat rolling determining means and driving the seat rolling; and an interior of the seat back folding drive section. 1. A power seat folding control device comprising: a locking mechanism that locks or unlocks the seat from a vehicle body in conjunction with the seatback folding drive unit by sharing a drive source with the seatback folding drive unit.