JP2007153166A - Vehicular seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power-driven type vehicular seat for assisting a person for getting in/getting off a vehicle, which eliminates a trouble of adjusting the seat position by taking a configuration for automatic return to the seat position immediately before the person gets off the vehicle in the getting-on operation. <P>SOLUTION: The vehicular seat device comprises: a slide mechanism 20 for sliding a seat 1 in the longitudinal direction of a cabin; a turning mechanism 26 for turning the seat in the horizontal direction between the front side position of the vehicle and the opening part side position; a driving device for driving the slide mechanism 20 and the turning mechanism 26; a controller 19 for controlling the driving device; and a sensor 14 for detecting the longitudinal position of the seat 1. The sensor 14 detects the slide position of the seat immediately before a person gets off the vehicle in the getting-off operation, and the controller 19 drives the seat to the slide position of the seat immediately before the person gets off the vehicle detected by the sensor during the getting-on operation, and returns the seat to the seat position immediately before the person gets off the vehicle. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention belongs to the technical field of a vehicle seat device that assists getting on and off by driving a seat when an elderly person or a disabled person gets on and off the vehicle.

A conventional vehicle seat device includes a longitudinal movement mechanism that moves the seat body in the longitudinal direction of the vehicle, and approximately 90 in the horizontal direction between the position facing the front of the vehicle and the position facing the door opening. A rotation mechanism for rotating and a lift-up mechanism for moving the seat body directed toward the door opening by the rotation mechanism while being lowered to the outside of the passenger compartment through the door opening (for example, Patent Document 1) reference).
JP 2005-306322 A

However, in the conventional vehicle seat device, when the passenger gets out of the vehicle, accommodates the seat, and gets on again, the front and rear positions of the seat and the reclining position have changed, and therefore it is necessary to readjust. There was a problem that it was bothersome.
If the passenger on the seat is the same person, it is possible to save the trouble of adjustment if the seat position at the time of the last boarding is maintained.

  SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and an object of the present invention is to automatically move the seat position at the time of getting off immediately before boarding in a power-driven seat that assists in getting on and off the vehicle. An object of the present invention is to provide a vehicle seat device that eliminates the troublesome adjustment of the seat position.

  In order to achieve the above-described object, in the vehicle seat device according to claim 1, the slide mechanism that slides the seat back and forth in the passenger compartment, and the seat between the front-facing position of the vehicle and the opening side position of the door. A vehicle seat device comprising: a rotation mechanism that rotates in a horizontal direction; a drive unit that drives the slide mechanism and the rotation mechanism; a controller that controls the drive unit; and a sensor that detects the front-rear position of the seat; Provided is a slide position storage means for storing the slide position of the seat immediately before getting off at the time of getting off, and the controller drives the seat to the slide position of the seat immediately before getting off stored in the slide position storing means at the time of getting on. In this configuration, the seat is returned to the seat position immediately before getting off.

  The vehicle seat device according to claim 2 is the vehicle seat device according to claim 1, wherein the reclining mechanism for adjusting the inclination angle of the seat back, the driving means for driving the reclining mechanism, and the reclining angle of the seat back are set. A reclining angle sensor for detecting, and a reclining angle storage means for storing a reclining angle of a seatback immediately before getting off at the time of getting off, and the controller immediately before getting off at the time of getting on, stored in the reclining angle storing means The seat back is driven to the reclining angle of the seat, and the seat is returned to the reclining angle immediately before getting off.

  In the vehicle seat device according to claim 3, in the vehicle seat device according to claim 1 or 2, the seat is lowered when the seat is moved toward the outside of the vehicle at the time of getting off, and the seat is moved inside the vehicle at the time of getting on. And a lift-up mechanism that raises the seat when the sheet is moved.

In the vehicle seat device according to the first aspect of the present invention, the slide position storing means stores the slide position of the seat immediately before getting off when the getting-off operation is performed, and the controller stores the just-before getting-off stored by the slide position storing means at the time of getting on. Since the seat is driven to the seat slide position, the troublesome seat position adjustment is eliminated when the same person gets on again.
In the conventional vehicle seat device, the seat returns to the specified position every time the vehicle is boarded, and thus re-adjustment is necessary. However, in the present invention, since the immediately preceding boarding position is stored, the vehicle can travel as it is.

  In the vehicle seat device according to claim 2, the reclining angle of the seatback immediately before getting off at the time of getting off is stored by the reclining angle storage means, and the controller immediately before getting off at the time of getting on is stored by the reclining angle storage means. Since the seat back is driven to the reclining angle of the seat, the troublesome adjustment of the reclining angle is eliminated when the same person gets on again.

  In the vehicle seat device according to claim 3, there is provided a lift-up mechanism that lowers the seat when moving the seat toward the outside of the vehicle when getting off and raises the seat when moving the seat into the vehicle when getting on. Because it is equipped, even a wheelchair can easily and reliably assist getting on and off.

  The vehicle seat device of the present invention is applied to a power drive seat that assists the passenger on the passenger side of the vehicle, and as shown in FIG. 1, when the vehicle stops and the seated person gets off, the drive motor As a result, the seat 1 slides rearward and rotates about 90 ° in the direction of the opening of the door 2 while the seat 1 body moves while descending out of the vehicle.

When the seat 1 slides between points A and C and the "exit switch" is pressed at point B, the seat moves backward to point C, reaches point D while rotating and sliding, and the seated person moves from seat 1 If you press the “ON” switch away, you will return to the passenger compartment while reversing the trajectory you have moved.
The vehicle seat device according to the present invention stores and saves the slide position and the reclining position information, and then sets the target position when returning by pressing the “ON switch”.

  Hereinafter, the best mode for carrying out the present invention will be described based on the first embodiment.

First, the configuration will be described.
Next, FIG. 2 is a block diagram of the present invention.
The slide switch 3 is a switch that adjusts the front-rear position of the seat 1 in the vehicle interior and moves back and forth on the rail via a drive device.
The reclining switch 4 is a switch that adjusts the angle of the seat back as a backrest, and adjusts the forward and backward tilt angles via a drive device.
The seat entry / exit switch 5 includes an “on / off switch” that is operated when the user gets on the vehicle and an “exit switch” that is operated when the user gets off the vehicle.

  For example, the slide position reference switch 6 is disposed at the rear end position of the seat slide, and is set to ON when the slide position of the seat 1 is at the slide reference position, and is OFF otherwise.

  The reclining position reference switch 7 is disposed, for example, at the rear end position of the reclining angle, and this position is set as the reclining reference position. The reclining position reference switch 7 is turned on when the reclining angle of the seatback is at the reclining reference position, and is turned off otherwise.

The rotary motor 10 rotates under the control of a signal from the motor drive circuit 11.
The rotation position sensor 12 detects the rotation angle of the sheet 1 by measuring the motor rotation pulse of the rotation motor 10.

The slide motor 13 rotates under the control of a signal from the motor drive circuit 11.
The slide position sensor 14 detects the slide position of the sheet 1 by measuring the number of rotation pulses of the slide motor 13 from the slide reference position.

The reclining motor 15 rotates under the control of a signal from the motor drive circuit 11.
The reclining position sensor 16 detects the reclining position (angle) of the seat back by measuring the number of motor rotation pulses of the reclining motor 15 from the reclining reference position.

  The elevating motor 17 rotates under the control of a signal from the motor drive circuit 11, and assists in getting on and off by raising and lowering the seat 1 from the door.

The controller 19 includes a signal processing arithmetic circuit 18, a motor drive circuit 11, a slide position storage unit 8, and a reclining angle storage unit 9.
The signal processing arithmetic circuit 18 receives the signals from the switches and sensors, performs processing arithmetic, and outputs a command signal to the motor drive circuit 11.
The motor drive circuit 11 outputs a drive signal to each motor in response to a command signal from the signal processing arithmetic circuit 18.

The slide position storage means 8 records the number of motor rotation pulses measured by the slide position sensor 14 when the vehicle gets off.
The reclining angle storage means 9 records the number of motor rotation pulses of the reclining motor 15 measured by the reclining position sensor 16 at the time of getting off.

Next, FIGS. 3-6 is explanatory drawing of the specific mechanism of a vehicle seat apparatus.
A slide mechanism 20 shown in FIG. 3 is provided on the floor at the driver's seat position of the vehicle. The slide mechanism 20 includes front and rear slide rails 21 installed on the vehicle floor in parallel with each other along the vehicle front-rear direction. The vehicle includes a front / rear slide base 22 that moves in the vehicle front-rear direction via both slide rails 21 and a drive device interposed between the slide base 22 and the vehicle floor. The drive device includes a screw shaft 23 rotatably supported on the vehicle floor, a slide motor 13 that rotates the screw shaft 23 about its axis, and a nut 25 that is attached to the slide base 22 and meshes with the screw shaft 23. ing. When the slide motor 13 is driven, the screw shaft 23 rotates around the shaft and the nut 25 and consequently the slide base 22 move in the vehicle front-rear direction, whereby the rotation mechanism 26, lift-up mechanism 34 and seat 1 main body move in the vehicle front-rear direction. Moving.

  A rotation mechanism 26 shown in FIG. 4 is attached on the slide base 22. The rotating mechanism 26 includes a rotating gear 27 and an arc-shaped fixed gear 28 that mesh with each other. The rotation gear 27 is attached to the slide base 22, and the rotation base is attached to the upper surface side of the fixed gear 28. The rotary gear 27 is attached to the output shaft of the rotary motor 10, and when the rotary motor 10 is driven, the fixed gear 28 is rotated through meshing of the gear portion, whereby the lift-up mechanism 34 and the seat 1 main body are rotated.

  The slide mechanism 20 and the rotation mechanism 26 can move the seat 1 in the vehicle front-rear direction along the slide rail 21 and operate the rotation motor 10 so that the seat 1 faces the front side of the vehicle and the entrance / exit side. It is configured so that the direction can be changed between the facing state.

  As shown in FIGS. 5 and 6, the seat 1 body includes a seat cushion 29 as a seat portion and a seat back 30 as a backrest. A headrest is provided on the upper portion of the seat back 30. It is supported at the rear so that it can tilt (can be reclined).

  As shown in FIG. 5, the reclining mechanism 31 of the seat 1 includes a reclining motor 15, rotates the drive gear 32 according to a signal from the controller 19, and changes the meshing position with the fixed gear 33, thereby changing the seat back 30. The angle is adjusted.

  As shown in FIG. 6, the lift-up mechanism 34 includes a lift-up base 35 and a slide rail installed on the upper surface thereof. This slide rail is composed of an outer lift slide rail 36 and an inner lift slide rail 37, and these rails 36, 37 extend obliquely downward to ensure a slide length and a vertical difference between up and down.

  The drive mechanism of these rails 36 and 37 is a mechanism comprising a pulley and a belt that operates using the lifting motor 17 as a driving source, and a driving pulley 38 that is rotated by the lifting motor 17 and a driven pulley 40 that guides the belt 39 back and forth is set. Has been.

  When the elevating motor 17 is driven in the forward direction, the seat 1 body moves toward the outside of the passenger compartment while descending through the meshing of the pulley and the belt 39. When the lifting / lowering motor 17 is driven in the reverse direction in a state where the seat 1 main body has moved to the outside of the passenger compartment, the seat 1 main body moves upward while moving upward.

  When the “exit switch” of the seat in / out switch 5 is pressed, the controller 19 first drives the slide motor 13 to retract the slide position immediately before getting off to the slide reference position, and then drives the reclining motor 15 to recline. Return the position to the reclining reference position. Next, the rotary motor 10 is driven to change the direction of the seat 1 from the state toward the front of the vehicle to the state toward the entrance / exit, and finally, the lift motor 17 is driven to move the seat 1 out of the passenger compartment. To lower.

  When the “on / off switch” of the seat entry / exit switch 5 is pressed, the controller 19 first drives the lift motor 17 to raise the seat 1 into the passenger compartment, and then drives the rotary motor 10 to change the orientation of the seat 1. Return from the state of facing the boarding / exiting side to the state of facing the front side of the vehicle. Next, the slide motor 13 is driven to return the slide position to the position when the “exit switch” is pressed, that is, the slide position just before getting off, and finally the reclining motor 15 is driven to set the reclining position just before getting off. Return to the reclining position.

  Here, at the time of getting on and off, the driving device drives the seat 1 based on the control of the controller 19, but at the time of getting on and off, the seat back is tilted backward (for example, 8 ° to 10 °) to drive the seat 1. As a result, the seated vehicle is released from the pressure on the seat back and a wide seating space is secured, so that the passenger can get on and off smoothly.

[Seat drive control process when getting off]
FIG. 7 is a flowchart showing the flow of the on-board seat drive control process executed by the controller 19 of the first embodiment. Each step will be described below. This control process is repeatedly executed every predetermined calculation cycle when the passenger seat door is open.

  In step S1, it is determined whether or not the “exit switch” of the sheet in / out switch 5 has been pressed. If yes, then go to step S2, if no, go to return.

  In step S2, the slide motor 13 is driven to retract the seat 1 to the slide reference position, and the process proceeds to step S3.

  In step S3, the number of motor rotation pulses of the slide motor 13 measured by the slide position sensor 14 is stored in the slide position storage means 8, and the process proceeds to step S4.

  In step S4, the reclining motor 15 is driven to tilt the seat 1 back to the reclining reference position, and the process proceeds to step S5.

  In step S5, the number of motor rotation pulses of the reclining motor 15 measured by the reclining position sensor 16 is stored in the reclining angle storage means 9, and the process proceeds to step S6.

  In step S6, the rotary motor 10 is driven to rotate the seat 1 by about 90 ° in the direction of the door opening, and the process proceeds to step S7.

  In step S7, the elevating motor 17 is driven to lower the seat 1 from the door to a predetermined position outside the passenger compartment, and the process proceeds to return.

[Riding seat drive control processing]
FIG. 8 is a flowchart showing the flow of the on-board seat drive control process executed by the controller 19 of the first embodiment. Each step will be described below. This control process is repeatedly executed every predetermined calculation cycle when the passenger seat door is open.

  In step S11, it is determined whether or not the “on / off switch” of the sheet in / out switch 5 has been pressed. If YES, the process proceeds to step S12. If NO, the process proceeds to return.

  In step S12, the number of motor rotation pulses of the slide motor 13 stored in the slide position storage means 8 is read, and the process proceeds to step S13.

In step S13, the number of motor rotation pulses of the reclining motor 15 stored in the reclining position storage means 9 is read,
Control goes to step S14.

  In step S14, the elevating motor 17 is driven to raise the seat 1 to a predetermined position in the passenger compartment, and the process proceeds to step S15.

  In step S15, the rotary motor 10 is driven to rotate the seat 1 90 degrees forward of the vehicle, and the process proceeds to step S16.

  In step S16, the slide motor 13 is driven to advance the seat 1 by a predetermined distance from the slide reference position, and the process proceeds to step S17.

  In step S17, it is determined whether or not the number of motor rotation pulses from the slide reference position of the slide motor 13 is equal to or greater than the number of motor rotation pulses read in step S12. If YES, the process proceeds to step S18, and if NO, the process proceeds to step S16.

  In step S18, the reclining motor 15 is driven to tilt the seat 1 forward by a predetermined angle from the reclining reference position, and the process proceeds to step S19.

  In step S19, it is determined whether or not the number of motor rotation pulses from the reclining reference position of the reclining motor 15 is equal to or greater than the number of motor rotation pulses read in step S13. If YES, the process proceeds to return, and if NO, the process proceeds to step S18.

[Seat drive control operation when riding]
When the occupant presses the “on / off switch” of the seat entry / exit switch 5, the process proceeds from step S 11 to step S 12 to step S 13 in the flowchart of FIG. 8. In step S 12, the slide stored in the slide position storage unit 8. The motor rotation pulse number of the motor 13 is read, and in step S13, the motor rotation pulse number of the reclining motor 15 stored in the reclining position storage means 9 is read.

  Subsequently, the process proceeds from step S14 to step S15, and after the seat 1 has been raised to a predetermined position in the passenger compartment, the seat 1 rotates about 90 ° forward of the vehicle.

  Next, the flow from step S16 to step S17 is repeated until the number of motor rotation pulses from the slide reference position of the slide motor 13 is equal to or greater than the number of motor rotation pulses read in step S12, and the sheet 1 gradually advances. .

  In step S17, when it is determined that the number of motor rotation pulses from the slide reference position of the slide motor 13 is equal to or greater than the number of motor rotation pulses read in step S12, the process proceeds to step S18 and the reclining motor 15 from the reclining reference position. Until the motor rotation pulse number becomes equal to or greater than the motor rotation pulse number read in step S13, the flow from step S18 to step S19 is repeated, and the seat back gradually tilts forward.

  In step S19, when the motor rotation pulse number from the slide reference position of the slide motor 13 is equal to or greater than the motor rotation pulse number read in step S13, the forward movement of the seat 1 is stopped.

Next, the operation will be described.
[Seat position return action]
FIG. 9 is a time chart showing the operation of each motor showing the seat position return operation of the first embodiment, and shows the operation of each motor when the passenger on the passenger seat gets off again after getting off in time series.

(a) When getting off the vehicle At time t1, the “exit switch” of the seat entry / exit switch 5 is pressed, and from time t2 to time t3, the slide position of the seat 1 pushes the “exit switch” by driving the slide motor 13. Retreat from the position immediately before the slide, which is the position immediately before, to the slide reference position.

  At the time point t3, since the slide position of the seat 1 has moved back to the slide reference position, the slide position reference switch 6 is turned from OFF to ON, and the slide motor 13 is stopped. At the same time, the number of motor rotation pulses of the slide motor 13 from time t2 to time t3 is stored in the slide position storage means 8.

  From time t4 to time t5, the reclining motor 15 is driven so that the reclining angle of the seat 1 tilts backward from the position immediately before reclining, which is the position immediately before pressing the “out switch”, to the reclining reference position.

  At the time t5, the reclining angle of the seat 1 is tilted backward to the reclining reference position, so the reclining position reference switch 7 is turned from OFF to ON, and the reclining motor 15 is stopped. At the same time, the number of rotation pulses of the reclining motor 15 from time t4 to time t5 is stored in the reclining angle storage means 9.

From time t6 to time t7, the seat 1 rotates 90 ° in the direction of the door opening by driving the rotary motor 10.
From time t8 to time t9, the seat 1 is lowered from the passenger compartment to the exterior of the passenger compartment by driving the lifting motor 17.

(b) During boarding operation At time t10, the "on / off switch" of the seat entry / exit switch 5 is pressed, and from time t10 to time t11, the seat 1 is raised from outside the vehicle compartment to a predetermined position in the vehicle compartment by driving the lifting motor 17 To do.
From time t12 to time t13, the seat 1 rotates 90 ° forward of the vehicle by driving the rotary motor 10.

From time t14 to time t15, the slide position of the seat 1 is advanced from the slide reference position by driving the slide motor 13.
At time t15, since the number of motor rotation pulses from the slide reference position of the slide motor 13 matches the number of rotation pulses stored in the slide position storage unit 8, the slide motor 13 stops. At this time, the slide position of the seat 1 coincides with the position immediately before the slide immediately before getting off.

From time t16 to time t17, the reclining angle of the seat 1 is tilted forward from the reclining reference position by driving the reclining motor 15.
At time t17, since the number of motor rotation pulses from the reclining reference position of the reclining motor 15 coincides with the number of rotation pulses stored in the reclining angle storage means 9, the reclining motor 15 stops. At this time, the reclining angle of the seat 1 has returned to the reclining angle immediately before getting off.

Next, the effect will be described.
The vehicle seat device according to the first embodiment has the effects listed below.

  The slide position storage means 8 stores the slide position of the seat 1 immediately before getting off at the time of getting off. The controller 19 stores the seat 1 up to the slide position of the seat 1 immediately before getting off stored at the time of getting on. Therefore, when the same person gets on again, the trouble of adjusting the seat position is eliminated.

  In the conventional vehicle seat device, since the seat 1 returns to the prescribed position every time the vehicle is boarded, it is necessary to readjust. However, in the present invention, since the immediately preceding boarding position is stored, it is possible to board the vehicle as it is. .

  Further, the reclining angle storage means 9 stores the reclining angle of the seat back immediately before getting off at the time of getting off, and the controller 19 seats up to the reclining angle of the seat immediately before getting off stored at the reclining angle storing means 9 at the time of getting on. Since the back is driven, the troublesome adjustment of the reclining angle is eliminated when the same person gets on again.

  Further, since the controller 19 is configured to tilt the seat back backward during the getting-on / off operation, the feeling of pressure on the seat back is eliminated, and a wide seating space is secured.

  Furthermore, since the seat 1 is lowered when the seat 1 is moved toward the outside of the vehicle at the time of getting off, and a lift-up mechanism for raising the seat when the seat is moved into the vehicle at the time of getting on is provided. Even if there is, you can get on and off without fail.

(Other examples)
Although the best mode for carrying out the present invention has been described based on the first embodiment, the specific configuration of the present invention is not limited to the first embodiment and does not depart from the gist of the present invention. Such design changes are included in the present invention.

  For example, in the first embodiment, the sensor measures the rotation pulse of the drive motor to obtain the position information. However, as the sheet position information recognition means, other mechanisms such as an optical recognition device may be employed. Is possible.

It is explanatory drawing which shows operation | movement of the vehicle seat apparatus. It is a block diagram which shows the structure of the vehicle seat apparatus. It is explanatory drawing of a slide mechanism. It is explanatory drawing of a rotation mechanism. It is explanatory drawing of a reclining mechanism. It is explanatory drawing of a raising / lowering mechanism. It is a flowchart which shows the flow at the time of alighting. It is a flowchart which shows the flow at the time of boarding. It is a time chart which shows the mutual operation | movement of each apparatus of a vehicle seat apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat 2 Door 3 Slide switch 4 Reclining switch 5 Seat in / out switch 6 Slide position reference switch 7 Reclining position reference switch 8 Slide position storage means 9 Reclining angle storage means 10 Rotation motor 11 Motor drive circuit 12 Rotation position sensor 13 Slide motor 14 Slide Position sensor 15 Reclining motor 16 Reclining position sensor 17 Lift motor 18 Signal processing arithmetic circuit 19 Controller 20 Slide mechanism 21 Slide rail 22 Slide base 23 Screw shaft 25 Nut 26 Rotating mechanism 27 Rotating gear 28 Fixed gear 29 Seat cushion 30 Seat back 31 Reclining Mechanism 32 Rotating gear 33 Fixed gear 34 Lift-up mechanism 35 Lift-up base 36 Outer lift slice Drake 37 Inner lift slide rail 38 Drive pulley 39 Belt 40 Driven pulley

Claims (3)

A slide mechanism that slides the seat back and forth in the passenger compartment, a rotation mechanism that rotates the seat horizontally between the front-facing position of the vehicle and the opening side position of the door, and a drive that drives the slide mechanism and the rotation mechanism A vehicle seat device comprising means, a controller for controlling the drive means, and a sensor for detecting the front and rear position of the seat,
Provided with a slide position storage means for storing the slide position of the seat immediately before getting off at the time of getting off,
The controller is a vehicle seat device configured to drive the seat to a slide position of the seat immediately before getting off stored in the slide position storage means and return to the seat position immediately before getting off when the boarding operation is performed. A reclining mechanism for adjusting the inclination angle of the seat back;
Driving means for driving the reclining mechanism;
A reclining angle sensor for detecting the reclining angle of the seat back;
Reclining angle storage means for storing the reclining angle of the seat back immediately before getting off when the getting off operation is performed;
Provided,
2. The vehicle seat according to claim 1, wherein the controller drives the seat back to a reclining angle of a seat immediately before getting off stored in the reclining angle storage means and returns to the reclining angle immediately before getting off when riding. apparatus. A lift-up mechanism is provided for lowering the seat when moving the seat toward the outside of the vehicle when getting off and for raising the seat when moving the seat into the vehicle when getting on. The vehicle seat device according to 2.

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