JP4200787B2 - Vehicle seat - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle seat including an inclination angle adjustment mechanism that adjusts an inclination angle of a seat back portion, and a slide mechanism that moves a seat cushion portion in the front-rear direction.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a two-door vehicle having only a front seat or a two-door vehicle having a rear seat, a structure in which a seat back portion of the front seat is laid down to access the rear seat from the front seat door is adopted. There are many things.
[0003]
Many of the vehicles adopting such a structure have the seat back portion almost upright because the seat back portion is locked at the first-stage lock position of the seat reclining mechanism when the seat back portion is laid down. Thus, there is a problem that the seat back portion needs to be inclined again at an appropriate angle before getting on the front seat.
[0004]
For this reason, a mechanism has been considered that automatically returns the angle of the seat back part to the inclination angle of the seat back part before falling down when the fallen seat back part is erected using an electric reclining mechanism. . (For example, see Patent Document 1)
[0005]
[Patent Document 1]
JP-A-2001-239862 [0006]
[Problems to be solved by the invention]
However, when a vehicle seat using a mechanism that automatically raises the seat back portion up to the inclination angle of the seat back portion before being laid down is used for a two-seater vehicle, the seat is in a state where the seat back portion is laid down. If the seat back portion is raised after the cushion portion is moved rearward of the vehicle, there is a possibility of interfering with a storage box opening / closing door provided at the rear of the seat. Further, in the case of a two-door vehicle with a rear seat, if the seat back portion is automatically raised while the seat cushion portion is moved to the rear of the vehicle, the seat back portion falls to the rear seat side. Therefore, the rear end of the seat back portion may interfere with the rear seat occupant.
[0007]
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a vehicle seat capable of adjusting the standing angle of the seat back when the seat back portion that has been laid down is raised. To do.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problem, the invention according to claim 1 is a vehicle seat including an inclination angle adjustment mechanism that adjusts an inclination angle of a seat back portion, and a slide mechanism that moves the seat cushion portion in the front-rear direction. Inclining angle detecting means for detecting the inclination angle of the seat back portion by the tilting operation of the seat back portion, slide position detecting means for detecting the slide position of the seat cushion portion, and the seat back portion that has been laid down are raised. In this case, it is determined how much the seat cushion part slides with respect to the slide position at the time of the lying down operation , and the last end of the seat back part is lowered before being lowered according to the obtained slide amount. so the last end in the same position of the seat back portion, and a control means for determining the upright angle of the seat back portion Characterized in that it is a vehicle seat.
By configuring as described in claim 1, even when the slide position of the seat cushion portion is changed when the seatback portion that has fallen is erected, the seat of the seatback portion that is erected It is possible to prevent the rear end portion from falling to the rear side of the seat than before the seat back portion is laid down.
[0009]
According to a second aspect of the present invention, in the vehicle seat according to the first aspect, the control means subtracts a tilt angle proportional to the slide amount from the tilt angle detected by a lying down operation. The standing angle of the back portion is determined.
[0010]
By configuring as described in claim 2, by adjusting the tilt angle of the seat back by subtracting the tilt angle by the tilt angle proportional to the slide amount, the tilt angle adjustment of the seat back is minimized. It becomes possible.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the invention related to the vehicle seat according to the present invention will be described with reference to the drawings.
[0012]
As shown in FIGS. 1 and 2, the vehicle seat 1 includes a seat cushion portion 2 and a seat back portion 3.
[0013]
The frame 2 a of the seat cushion portion 2 is attached to the vehicle floor surface 5 via a pair of slide mechanisms 4, and can be moved in the vehicle front-rear direction by the slide mechanism 4. The slide mechanism 4 includes a slide lower rail 6 fixed to the passenger compartment floor 5, a slide upper rail 7 to which the seat cushion portion 2 is fixed, a lead screw 8 rotatably provided on the slide upper rail 7, and a lead screw And a nut 9 screwed into the eight screw grooves. The nut 9 is fixed to the slide lower rail 6 by a nut housing 10.
[0014]
In the seat cushion portion 2, a slide motor 11 for rotating the lead screw 8, a control unit 13 for controlling the operation of the slide motor 11 and a reclining motor 12 described later, and a driving force of the slide motor 11 to the lead screw 8. And a gear case 15 for rotating the lead screw 8 using the driving force of the slide motor 11 transmitted by the motor shaft 14, and the side of the seat cushion portion 2. The seat is provided with a seat operation section 16 for changing the slide position of the seat cushion section 2 and the inclination angle of the seat back section.
[0015]
The control unit 13 includes a CPU (not shown) that controls the operation of the slide motor 11 and the reclining motor 12, and a storage unit (not shown) that stores the slide position of the seat cushion part 2 and the inclination angle of the seat back part 3. And. Further, the control unit 13 receives the pulse signals from the two slide motor drive power supply lines 17 a and 17 b used for transmitting the drive power to the slide motor 11 and the slide motor 11, and the slide position of the seat cushion portion 2 . Are provided with two slide motor pulse signal lines 18a and 18b.
[0016]
One drive power line 17a, 17b for the slide motor is connected to each pole of the power input terminal of the slide motor 11, and the control unit 13 switches between the plus side and the minus (ground) side of the power supply. Thus, the rotation direction of the slide motor 11 can be changed.
[0017]
The slide motor pulse signal lines 18 a and 18 b have a role of transmitting a pulse signal generated from the slide motor 11 to the control unit 13. The slide motor 11 has a built-in magnet for generating a pulse signal and generates a periodic pulse (an electric signal in the range of 0 to 5 volts) as the shaft of the slide motor 11 rotates. ing. The control unit 13 determines the slide position of the seat cushion portion 2 based on the count number of pulse inputs with respect to this reference point, with the vehicle front portion of the slide mechanism as the reference point.
[0018]
The seat operation unit 16 includes an angle change unit 16a for changing the angle of the seat back unit 3 and a slide position change unit 16b for changing the slide position of the seat cushion unit 2 . The input information input by the changing units 16a and 16b is transmitted to the control unit 13 via the information transmission cables 19a and 19b, and the inclination angle of the seat back unit 3 and the sliding position of the seat cushion unit 2 are determined according to the input information. Be changed.
[0019]
The seat back portion 3 is connected to the seat cushion portion 2 via the power reclining unit 20 so as to be tiltable. The power reclining unit 20 performs a tilting operation of the seat back part 3, a cushion fixing part 21 fixed to the frame 2 a of the seat cushion part 2, a seat back fixing part 22 fixed to the frame 3 a of the seat back part 3. And a seat back operation button (reclining switch) 23 that can lie down or stand the seat back portion 3 with one action.
[0020]
The seat back fixing part 22 is formed with a tilting shaft part 22a fitted into a bearing part 21a provided in the cushion fixing part 21, and a worm wheel 24 is provided at an end of the tilting shaft part 22a. The worm wheel 24 formed on the tilting shaft portion 22 a is meshed with a worm 25 provided on the rotating shaft of the reclining motor 12, and the seatback fixing portion 22 tilts as the rotating shaft of the reclining motor 12 rotates. The shaft portion 22a is rotated to change the inclination angle of the seat back portion 3.
[0021]
The reclining motor 12 receives two reclining drive power supply lines 27 a and 27 b extending from the control unit 13 and a pulse signal generated by the control unit 13 as the reclining motor 12 rotates. Two reclining motor pulse signal lines 28a and 28b used for detecting the angle are provided. Similar to the slide motor 11, the control unit 13 performs the operation of the reclining motor 12 by controlling the energization of the reclining drive power supply lines 27a and 27b, and the inclination of the seat back portion 2 by the reclining motor pulse signal lines 28a and 28b. Angle detection is performed.
[0022]
The seat back operation button 23 is provided on the side of the seat. When the button is operated, information indicating that the seat back operation button 23 is operated via the operation information transmission line 30 connected to the control unit 13. Is transmitted to the control unit 13.
[0023]
When the seat back operation button 23 is operated while the seat back portion 3 is standing, the seat cushion portion 2 is moved to the foremost portion by the slide mechanism 4 after the seat back portion 3 is laid down. Further, when the seat back operation button 23 is operated in a state where the seat back portion 3 is lying down, the control unit 13 determines the slide position of the seat cushion portion 2 when the seat back operation button 23 is operated and the seat back. Based on the inclination angle of the portion 3, the seat back portion 3 is raised. Hereinafter, the control procedure of the control unit 13 will be described with reference to the flowchart shown in FIG.
First, when the seat back operation button 23 is operated while the seat back portion 3 is standing, the control unit 13 operates the reclining motor 12 to fall the seat back portion 3 in step S1. The inclination angle α of the seat back portion 3 is obtained by counting the pulse signals detected along with the tilting operation and stored in the storage portion.
[0025]
After the seat back part 3 is laid down, the control unit 13 stores the slide position of the seat cushion part 2 in the storage part in step S2, and then operates the slide motor 11 to move the seat cushion part 2 to the foremost part of the vehicle. Move to.
[0026]
Thereafter, in step S3, the control unit 13 determines whether or not the slide position changing unit 16b of the sheet operation unit 16 has been operated. When the slide position changing unit 16b is operated, in step S4, the control unit 13 moves the seat cushion unit 2 by driving the slide motor 11 according to the operation of the slide position changing unit 16. Note that when the angle changing unit 16a of the seat operating unit 16 is operated in a state where the seat back unit 3 is lying down, the inclination angle of the seat back unit 3 is not changed.
[0027]
Next, in step S5, the control unit 13 determines whether or not the seat back operation button 23 has been operated. If the seat back operation button 23 has not been pressed, the determination of whether or not the operation of the slide position changing unit 16b has been performed is repeated (step S3).
[0028]
When the operation of the seat back operation button 23 is performed, in step S6, it is determined whether or not the slide position of the seat cushion unit 2 has been changed by the slide position changing unit 16b with the seat back unit 3 lying down. I do. If the slide position is not changed by this determination, in step S7, the control unit 13 drives the reclining motor 12 to erect the seat back portion 3 by the inclination angle α stored in the storage portion.
[0029]
When the slide position is changed, the control unit 13 compares the slide position of the seat cushion part 2 with the slide position stored in the storage unit in step S8.
[0030]
When the detected slide position is located in front of the vehicle with respect to the slide position stored in the storage unit, that is, “the distance from the vehicle frontmost part in the slide mechanism 4 to the stored slide position ≧ the vehicle in the slide mechanism 4 In the case of “distance from the foremost portion to the detected slide position”, in step S7, the control unit 13 raises the seat back portion 3 by the inclination angle α of the seat back portion 3 stored in the storage portion.
[0031]
When the detected slide position is located at the rear of the vehicle with respect to the slide position stored in the storage unit, that is, “the distance from the vehicle frontmost part of the slide mechanism 4 to the stored slide position <the slide mechanism 4 In the case of “distance from the front of the vehicle to the detected slide position”, the control unit 13 obtains a distance difference (slide amount) L in step S9. In step S10, the control unit 13 adjusts (corrects) the tilt angle α stored in the storage unit by an angle corresponding to the obtained distance difference L to calculate the tilt angle β (α−κL: κ is a coefficient). In step S11, the seat back portion 3 is raised by the inclination angle β.
[0032]
FIG. 4 shows the state of the vehicle seat before the seat back portion 3 is laid down (dotted line), and the seat back portion 3 standing up by the inclination angle α stored in the storage portion from the state in which the seat back portion 3 is laid down. FIG. 6 is a diagram showing a state of a vehicle seat (two-dot chain line) in a case where the vehicle seat is used and a state of a vehicle seat (solid line) in which the seat back portion 3 is raised by an inclination angle β by the control unit 13. .
[0033]
Like the vehicle seat indicated by the two-dot chain line, if the seat back part 3 is raised without adjusting the inclination angle α, the rear end of the seat back part 3 moves backward by the distance L. There is a possibility that the seat back portion 3 may come into contact with a member installed behind the seat, a rear seat crew member, or the like. On the other hand, even when the seat back part 3 is slid rearward by the distance difference L, the inclination angle is adjusted after adjusting the inclination angle of the seat back part 3 as in the vehicle seat indicated by the solid line By raising the seat back part 3 by β, the rearmost end of the seat back part 3 is located at the same position as the seat back part 3 indicated by the dotted line , and therefore, it is possible to prevent interference with a member or the like behind the seat. Is possible.
[0034]
Thus, by adjusting the inclination angle when the seat back portion 3 is raised by the control unit 13 according to the distance difference L, the rear end of the seat back portion 3 is a member or rear seat crew member. Etc. can be prevented.
[0035]
Further, since the inclination angle β of the seat back part 3 is adjusted according to the distance difference L, the adjustment angle of the seat back part 3 can be minimized.
[0036]
The vehicle seat according to the present invention is not limited to the configuration described in the embodiment of the invention.
[0037]
【The invention's effect】
By configuring as described in claim 1, even when the seat position of the seat cushion portion is changed when the seat back portion that has fallen is erected, the rear end portion of the seat lies down on the seat It is possible to prevent the seat back portion before the seat from falling down behind the seat.
[0038]
According to the second aspect of the present invention, the adjustment angle of the seat back can be minimized by correcting the inclination angle of the seat back portion in the direction to stand up according to the slide distance difference of the seat cushion portion. It becomes possible.
[Brief description of the drawings]
FIG. 1 is a side view showing an internal structure of a vehicle seat according to the present invention.
FIG. 2 is a plan view showing an internal structure of a vehicle seat according to the present invention.
FIG. 3 is a flowchart showing a control process of a control unit according to the present invention.
FIG. 4 is a side view showing a vehicle seat according to the present invention in comparison with different standing angles and different slide positions.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat cushion part 3 Seat back part 4 Slide mechanism 4
13 Control unit (control unit)
16 Seat operation unit 16a Angle change unit 16b Slide position change unit 23 Seat back operation unit

Claims (2)

In a vehicle seat comprising an inclination angle adjustment mechanism for adjusting an inclination angle of a seat back part and a slide mechanism for moving the seat cushion part in the front-rear direction,
Inclination angle detection means for detecting the inclination angle of the seat back portion by the lying down operation of the seat back portion;
Slide position detecting means for detecting a slide position of the seat cushion portion;
When standing the seatback portion that has fallen down, find out how much the seat cushion portion slides relative to the slide position at the time of the lying down operation, and according to the obtained slide amount, the seatback portion A vehicle seat comprising: control means for determining an upright angle of the seat back so that the rear end of the seat back is at the same position as the rear end of the seat back before being laid down . 2. The vehicle seat according to claim 1, wherein the control unit determines an upright angle of the seat back portion by subtracting an inclination angle proportional to the slide amount from the inclination angle detected by the overturning operation. .

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