JPH0567454B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drive control device that rotates a vehicle seat when getting on and off the vehicle, in order to make it easier for an occupant to get on and off the vehicle.

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

Traditionally, in order to make it easier for passengers to get on and off the vehicle,
For example, there is a device that detects the intentions and conditions of an occupant using a door switch, key switch, seat switch, etc., and rotates the seat from the driving position to the riding position and from the riding position to the driving position.
Proposed in No. 214423.

However, in such conventional devices, no consideration was given to the inclination of the seat back. For this reason, when the seat is rotated with the seat bag in a so-called lying state, problems such as the seat bag colliding with the center console or the like, or the occupant being caught between them, have arisen.

The present invention has been made to solve the above problems, and when rotating the seat, the seat back is first tilted to a position that does not interfere with the rotation of the seat.
It is an object of the present invention to provide a drive control device for a rotating seat for a vehicle, which prevents a collision between a seat back and a center console, etc. by subsequently rotating the seat.

[Means for solving problems]

In order to achieve the above object, in the present invention,
As shown in FIG. 1, a rotary seat for a vehicle is provided to be rotatable around an axis substantially perpendicular to a horizontal plane, a rotating means for rotating the seat in accordance with a supplied drive signal, and a supply a tilting means for tilting the seat back portion of the seat relative to the seat cushion portion of the seat in response to a drive signal sent to the seat; detecting the position of the seat; seat position detection means for outputting a position signal and a riding position signal; tilt angle detection means for detecting a tilt angle of the seat back portion with respect to the seat cushion portion; and outputting a tilt signal when the detected tilt angle is greater than or equal to a predetermined value; , door opening/closing detection means for detecting the opening/closing angle of the door, and outputting a door open signal when the detected opening/closing angle is greater than or equal to a predetermined value, and outputs a door close signal when the detected opening/closing angle is smaller than the predetermined value;
Detects whether or not an occupant is seated on the seat cushion, and outputs a seating state change signal in response to a change of the occupant from a seated state to a dismounted state or from a dismounted state to a seated state. and a driving signal to the tilting means to bring the tilt angle detected by the tilt angle detecting means to the predetermined value while inputting both the door open signal and the tilt signal. is supplied, and while only the door open signal is input, a drive signal is supplied to the rotating means until the riding position signal is input, and the door closing signal or the seating state change signal is input. There is provided a drive control device for a rotary seat for a vehicle, comprising an electronic control means for supplying a drive signal to the rotation means until the driving position signal is input.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on the accompanying drawings.

FIG. 2 is an overall configuration diagram including the rotary seat mounted in the vehicle and its drive control mechanism. 100
The seat is a rotary seat and is internally equipped with a rotation drive mechanism, a seatback drive mechanism, and a seatback inclination angle detection mechanism. Reference numeral 200 is a seating sensor that detects whether an occupant is seated and is incorporated inside the rotary seat 100. 400 is a door opening/closing angle sensor that detects the opening/closing angle of the vehicle door 300, 500 is an ignition switch, and 600 is a rotating seat 100 during an emergency stop.
700 is a manual switch for changing the inclination angle of the seat back, and 800 is a control mechanism that receives signals from each sensor and controls the rotation drive mechanism and the seat back drive mechanism.

The side surface of the rotary seat 100 is shown in FIG. 3, the plane of the seat 100 viewed from below is shown in FIG. 4, the cross section taken along line V-V in FIG. 4 is shown in FIG. They are shown in Figure 6.

In FIGS. 3 and 4, the rotary seat 100
The seat is composed of an upper frame 101, a lower frame 102 and a rotary table 110, and a seat body 103 composed of a seat cushion 104 and a seat back 104a is attached to the upper frame 101. The rotary table 110 has a structure in which a top plate 111 and a bottom plate 112 are rotatably joined with a sliding surface lubricated with grease or the like interposed therebetween. The rotation center shaft 113 is attached to the upper plate 111 and is rotatable with respect to the lower plate 112. Atsupa frame 101 is joined to Atsupa plate 111, and lower frame 102 is joined to lower plate 112, so Atsupa frame 101 and lower frame 1
02 is rotatable around a rotation center axis 113.

In FIG. 5, the driving spur gear 120 is fixed to the rotation center shaft 113. Further, the rotational drive motor 130 is fixed to the lower frame 102 via a stay 131, and its driving force is transmitted to the pinion 121 after being decelerated by a worm 132 and a worm wheel 133. When this pinion 121 meshes with the driving spur gear 120, driving force is transmitted to the rotation center shaft 113. Furthermore, due to the self-locking of this worm 132,
The rotary seat 100 at rest is locked.

In FIG. 6, the seat bag drive mechanism 140
consists of a fixed frame 141 to which the seat cushion 104 is fixed and a movable frame 142 to which the seat back 104a is fixed;
and is connected to a fixed frame 141 via a rotatable shaft 143. In addition, 145 is a stopper for the shaft 143.

Moreover, a tooth profile 144 centered on the shaft 143 is carved on the end of the movable frame 142. The seat back drive motor 146 is connected to the stay 1
It is fixed to the fixed frame 141 via 47. The driving force of the motor 146 is decelerated by a worm 148 and a worm wheel 149, and then transmitted to a pinion 150 that meshes with the tooth profile 144. Rotating plate 151 coaxially with pinion 150
is attached, and a magnet 15 is placed on its circumference.
Multiple pieces of 2 are attached. The movement of the magnet, that is, the rotation speed of the pinion 150, is detected by a sensor 153 using a magnetoresistive element, etc., and the movement angle of the movable frame 142, that is, the seat back 1 is detected.
Measure the inclination angle of 04a.

In Figure 4, operating position limit switch 1
60 and a riding position limit switch 161 are fixed to the lower frame 102. Rod 1 for operating these switches 160, 161
62 is attached to the upper frame 101, and the tip of the rod 162 protrudes from the lower surface of the lower frame 102 through a groove 163 formed in the lower frame 102. The protruding portion of the rod 162 presses the levers 160a and 161a of the operating position limit switch 162 and the riding position limit switch 161, respectively, thereby operating the respective switches 160 and 161. The front and rear slide rails 170 are fixed to the lower frame. The lever 171 is a known lock mechanism release lever attached to the slide rail 170.

Next, the configuration of the door opening/closing angle sensor 400 will be described. FIG. 7 shows a horizontal sectional view of the check lever attachment portion of the door 300. A door check 401 is fixed to the door 300, and a check lever 402 whose one end is pivotally connected to the vehicle body passes through the door check 401. Note that the door 300 is pivotally attached to the vehicle body by upper and lower hinges, and rotates within a range A.

FIG. 8 shows a sectional view taken along the line -- in FIG. 7. The other end of the check lever 402, that is, the door check 40
A stopper 403 and a striker 404 are fixed to the end of the door 300 that penetrates through the door 300 and enters the inner space of the door 300. Striker 404 on door 300
A linear potentiometer 411 having a lever 410 that moves when pressed is attached. The spring 412 returns the lever 410 to its original position (towards the door check 401) by its elastic force, and the shaft 413 is its guide. When the door 300 is opened or closed, the check lever 402 moves in and out of the door check 401. Striker 404 and spring 412 move accordingly, causing lever 410 to move. As a result, the linear potentiometer 411 exhibits a resistance value corresponding to the opening/closing angle of the door 300, and by measuring this resistance value, the door opening/closing angle is detected.

FIG. 9 shows a functional block diagram of the drive control mechanism 800. In the figure, 801 is a circuit for detecting the inclination of the seat bag 104a, 802 is a circuit for detecting the door opening/closing angle, 803 is an input interface for inputting signals from each switch and sensor, 804 is a microcomputer, 808 is a motor 130,
Output interfaces 806 and 807 that supply drive signals to motor 146 are circuits that respectively detect the current flowing through each motor.

Next, the operation of the present invention will be explained by the operation explanatory diagram in FIG.
11 to 14, the rotary seat drive control program executed by the microcomputer 804 (FIG. 9) will be explained using a flowchart.

First, in step S101 of FIG. 11, the ignition switch 500 (FIGS. 2 and 9) is turned on.
In steps S102 and S103, whether the door opening/closing angle θd exceeds a predetermined angle _θd1 (for example, 30°) that does not cause any problem even if the seat 100 is rotated, and in steps S104 and S105. Check whether the tilt angle θ _s (see Fig. 3) of the seat back is smaller than a predetermined angle θ _s1 (for example, 110°) at which no problem occurs when the seat rotates, that is, whether or not the so-called seat back is occurring. death,
If there is no problem (state shown in Figure 10a), the 12th
Execute the flowchart shown in the figure. Note that the predetermined angles θd ₁ and θ _s1 differ depending on the vehicle model, so
It is set according to each car model. On the other hand, θ _s is θ _s1
If it is larger (the answer to step S105 is negative (NO), that is, the seat back is in a so-called sleeping state), if the seat is rotated in this state, the seat back 104a will collide with the center console 900, as shown in FIG. 10b. Therefore, in steps S106 to S110, the seatback drive motor 146 is driven to raise the seatback to a position where the tilt angle _θs is smaller than the predetermined angle _θs1 , and then the flowchart in FIG. Note that an appropriate alarm device may be connected to the output terminal of the output interface 805 (FIG. 9), and the alarm device may issue an alarm while the steps S106 to S110 are being executed. .If an overload is applied to the motor 146,
Motor 146 via steps S107-S108-S111
When the reset switch 600 (FIGS. 2 and 9) is turned on in step S112, this flowchart is executed again from step S101.

FIG. 12 is a flowchart for rotating the rotary seat 100 toward the riding position, that is, toward the outside of the vehicle body. First, if the seating sensor 200 (FIG. 2) is off (the answer to step S201 is negative (NO)),
That is, when no passenger is seated on the seat and the door is opened for boarding, the rotary drive motor 130 is immediately driven (the step
S204), the answer to step S210 is affirmative (YES), that is, the seat is rotated to the position where the riding position limit switch 161 (FIG. 4) is turned on, that is, to the riding position. In addition, during this rotation, the rotational drive motor 13
0 is overloaded (step S205-
S206-S215-S216), when the occupant is seated on the seat (occupancy sensor 200 turns from off to on in step S207), or the door opening/closing angle θd becomes smaller than _θd1 (steps S208 and S209), the rotation of the seat is hindered. If this occurs, the sheet storage flowchart shown in FIG. 13, which will be described later, is immediately executed. When the limit switch 161 is turned on (the answer at step S201 is affirmative (YES), the rotary drive motor 130 is stopped (step S211), and whether the occupant is seated on the seat (step S212)
The seat retracting flowchart (FIG. 13) is also executed when the seating sensor 200 changes from OFF to ON) or when the driver stops riding and attempts to close the door (steps S213 and S214).

On the other hand, if the answer to step S201 is affirmative (YES), that is, if the passenger is seated and the door is opened to exit the vehicle, the microcomputer 804 (FIG. 9) After a certain time lag is set by timer 1 (steps S202 and S203), the above steps are performed.
Execute S204. The following operations are similar to those described above. However, in steps S207 and S212, the result is affirmative (YES) when the occupant gets off the seat (seating sensor 200 changes from on to off), contrary to the above case.

FIG. 13 is a flowchart for storing the seat described above. First, in step S301, the rotary drive motor 130 is driven to move the seat in the driving position direction.
That is, it is rotated toward the inside of the vehicle body. When the operating position limit switch 160 (FIG. 4) is turned on (the answer to step S304 is affirmative (YES)), the motor 13
0 is stopped (step S305), and this program is ended. In addition, steps S303, S306,
Since S307 is the same as steps S206, S215, and S216 described above, their explanation will be omitted.

FIG. 14 is a flow chart when the seat bag 104a is tilted by the manual switch 700 (FIGS. 2 and 9). This flowchart is executed when the answer to step S101 (FIG. 11) is negative (NO), that is, when the ignition switch 500 is on. Manual switch 7 in steps S401 and S402
00 is on the forward tilting side or the backward tilting side, and if it is on the backward tilting side (the answer in step S402 is affirmative (YES)), the seatback drive motor 14
6, the seat back 104 is tilted backward (step S403). When the manual switch is turned off or the seat back tilt angle θ _s detected in step S406 reaches a predetermined back tilt limit angle θ _s2 (for example, 170°) (the answer to step S407 is affirmative (YES)), the seat back is driven. The motor 146 is stopped (step S408). Steps even when leaning forward
In S409 to S413, the same operation as in the case of backward tilting is performed. Note that θ _s0 in step S413 is a predetermined forward tilt limit angle (for example, 60°). Step S404,
S405, S414, and S415 are the aforementioned S107, S108, respectively.
Since it is the same as S111 and S112, the explanation thereof will be omitted. Moreover, the above-mentioned θ _s0 and θ _s2 differ depending on the vehicle type.

In the above embodiment, the rotary seat and the seat bag are driven by a motor, but the invention is not limited to this, and it goes without saying that they may be driven by hydraulic pressure, pneumatic pressure, etc., for example.

Further, in the above embodiment, the seat back tilt angle sensor is a combination of a magnet and a magnetoresistive element, but the sensor is not limited to this. Alternatively, the position of the seat back may be measured using ultrasonic waves or the like.

Furthermore, in the above embodiment, a drive mechanism is provided only for rotating the seat and tilting the seat back, but a drive mechanism for sliding the seat back and forth, moving the seat up and down, etc. is also provided, and these drive mechanisms can be The drive control device of the present invention may be applied to a combination.

〔Effect of the invention〕

As explained above, according to the drive control device for a rotary vehicle seat of the present invention, when the seat is rotated from the driving position to the riding position, when the seatback tilt angle exceeds a predetermined angle while the person is sleeping, Since the seat is rotated after being raised to an angle of inclination of , the seat back will not collide with the center console etc. even if the seat rotates.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram showing the configuration of a drive control device for a rotating vehicle seat according to the present invention, FIG. 2 is an overall configuration diagram including a rotating seat mounted in a vehicle and its control mechanism, and FIG. 4 is a plan view of the seat; FIG. 5 is a sectional view taken along line V--V in FIG. 4; FIG. 6 is a sectional view taken along line - in FIG. 3; The figure is a horizontal sectional view of the check lever mounting part, FIG. 8 is a sectional view along the line - of FIG. 7, FIG. 9 is a functional block diagram of the drive control mechanism, FIG. 14th
The figure is a flowchart showing a rotary seat drive control program. 2...Rotation means, 3...Tilt means, 4...Seat position detection means, 5...Tilt angle detection means, 6...
Door opening/closing detection means, 7... Seating state detection means, 8
...Electronic control means, 100 ... Rotating seat, 10
0a... Seat back section.

Claims (1)

[Scope of Claims] 1. A rotating seat for a vehicle that is rotatably provided around an axis substantially perpendicular to a horizontal plane; a rotating means for rotating the seat in response to a supplied drive signal; a tilting means for tilting the seat back portion of the seat relative to the seat cushion portion of the seat in response to a drive signal; detecting the position of the seat; seat position detection means for outputting a signal and a riding position signal; tilt angle detection means for detecting a tilt angle of the seat back portion with respect to the seat cushion portion and outputting a tilt signal when the detected tilt angle is equal to or greater than a predetermined value; door opening/closing detection means for detecting the opening/closing angle of the door and outputting a door open signal when the detected opening/closing angle is greater than a predetermined value and outputs a door close signal when the detected opening/closing angle is smaller than the predetermined value; a seating state detection means for detecting whether or not the door is open, and outputting a seating state change signal in response to a change of the occupant from a seating state to a dismounted state or from a dismounted state to a seated state; While both the signal and the tilt signal are being input, a drive signal is supplied to the tilting means to bring the tilt angle detected by the tilt angle detection means to the predetermined value, and only the door open signal is input. While inputting, a drive signal is supplied to the rotating means until the riding position signal is input, and while the door closing signal or the seating state change signal is inputting, until the driving position signal is input. A drive control device for a rotary seat for a vehicle, comprising an electronic control means for supplying a drive signal to the rotation means. 2. The drive control device for a rotating vehicle seat according to claim 1, further comprising an alarm means, wherein the alarm means issues an alarm while both the door open signal and the tilt signal are input.