JPH0637149B2 - Vehicle seat adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention includes a drive device that reversibly adjusts the position of a vehicle seat in the front-rear direction of a vehicle in response to a seat position change instruction signal from the instruction device. The present invention relates to a vehicle seat adjustment device.

(Prior Art) A seat adjusting device for a vehicle is known that includes a drive device that reversibly adjusts the position of a vehicle seat in the front-rear direction of a vehicle in response to a seat position change instruction signal from the indicating device (for example, Japanese Laid-Open Patent Publication 58-18932). It is also known in the known art to actuate the drive device to displace the position of the vehicle seat to a predetermined rear position in connection with the stoppage of the vehicle. In such a device, when getting off and getting on the vehicle, there is an advantage that the volume of the interior space occupied by the vehicle seat is moved rearward so that getting on and off can be facilitated.

(Problems to be Solved by the Invention) However, at the start of operation, it is necessary to adjust the position of the vehicle seat each time the passenger gets in the vehicle. If the person on board is not the same person as the person who got off and has a different physique, it is generally necessary to make new adjustments. However, in an automobile owned by an individual, it is rather inconvenient to adjust the position of the vehicle seat every time the passenger gets in and out, because the same person repeats getting on and off.

The present invention is intended to provide a vehicle seat adjusting device in which such problems are solved.

That is, an object of the present invention is to retreat a vehicle seat when getting on and off to expand the volume of the space in front of the vehicle seat, and to return the vehicle seat to the position before the vehicle retreats prior to the start of operation of the vehicle. A seat adjustment device is provided.

(Structure of the Invention) In order to achieve the above object, the present invention reversibly adjusts the position of a vehicle seat in the longitudinal direction of a vehicle in response to a seat position change instruction signal from an instruction device, as shown in FIG. In the vehicle seat adjusting device including a drive device, the indicating device also actuates the drive device in connection with an operation of an occupant or a stop of operation of the vehicle to displace the position of the vehicle seat to a predetermined rear position. A backward signal and a return signal for activating the drive device to return the position of the vehicle seat to the front prior to the start of operation of the vehicle are generated. Signal generating means for generating a position signal corresponding to an actual position, the vehicle seat being displaced to the predetermined rear position by the drive device in relation to the stoppage of operation of the vehicle, Storing means for storing the position signal generated by the signal generating means, and the return position of the vehicle seat acting on the drive device prior to the start of the operation of the vehicle is regulated in accordance with the position signal stored in the storing means. It is characterized in that the control means is included.

(Operation and Effect) According to the configuration having the above characteristics, when the seat position change instruction signal is given by the instruction device, the drive device reversibly adjusts the position of the vehicle seat. Further, when a backward signal is generated in connection with the operation of the indicating device or the operation of the occupant or the stop of the operation of the vehicle, the vehicle seat is retracted to a predetermined rear position by the drive device, whereby the volume of the front space of the vehicle seat is expanded and the occupant's space is increased. Vehicle seats are adjusted to your liking and facilitate getting off and on.

On the other hand, a position signal corresponding to the actual position of the vehicle seat generated by the signal generating unit is stored in the storage unit prior to the backward movement of the vehicle seat accompanying the generation of the backward signal. Then, when the indicating device generates a return signal prior to the start of operation of the vehicle, the vehicle seat is returned to a return position that is regulated in accordance with the position signal stored in the storage means, and thereby the seat before the exit The position is reproduced.

Thus, when the same passenger or a person having the same size as the passenger who gets off the vehicle gets on, the trouble of re-adjusting the vehicle seat every time getting on is eliminated.

Further, according to such a configuration, since the position signal corresponding to the seat position is stored in relation to the stop of the operation, even when the occupant who has boarded has changed from the occupant who got off, and when the changed occupant repeats getting on and off. , If a new adjustment is made only once at the first boarding, the adjustment from the next time will be unnecessary automatically.

(Embodiment) FIG. 2 shows a vehicle seat adjusting device to which the present invention is applied. This seat adjusting device is configured to move and adjust the driver's seat 10 of an ordinary passenger car in the vehicle front-rear direction indicated by arrows A and B. Here, the direction A is the forward direction of the vehicle (and the seat), and the direction B is the backward direction.
A direct-current motor 12 capable of reversible rotation is operatively coupled to the driver's seat 10 and a speed reduction mechanism 14 is operatively connected thereto.
The seat 10 is moved in the backward direction B by the rotation of the motor 12 to the other side (reverse rotation),
In the stopped state, the position of the seat 10 is fixed.

The position of the seat 10 is controlled by a motor drive circuit 16 connected to the motor 12 and a position control device 18 for controlling power supply / stop to the motor 12 connected to the motor drive circuit 16 and switching of a power supply direction at the time of power supply. To be done. The position control device 18 is combined with the position storage device 20, receives the instruction signals from the instruction switch groups 22, 24 and 26 and the detection signal from the position detector 28, and follows the preset control conditions. A control output is generated and applied to the drive circuit 16. The position control device 18 has a microcomputer as a main component and is configured by combining required input / output circuits. That is, input of a signal by a preset control program, generation of a control output according to the above control conditions, and provision of an output signal to the drive circuit 16 in accordance with the generation of this control output are executed as a series of procedures. Further, the position storage device 20 is an RA built in the microcomputer.
M (a readable / writable memory) is used, and a position signal indicating the position of the seat, which will be described later, is stored here.

In the instruction switch group, the key switch 22 is closed when the ignition key switch is inserted in the key cylinder and opened when it is not inserted. The change signal generated by the change of the key switch 22 from the open state to the closed state represents the return condition of the seat prior to the start of operation of the vehicle.
It is also possible to apply a signal generating means for generating another switch signal (for example, a signal indicating opening / closing of an ignition contact of the key switch) or a detection signal in place of the key switch 22 as the recovery condition generating means.

The getting-off switch 24 is manually operated by the driver when trying to get off the vehicle, and is temporarily closed. The change signal generated by the change of the dismounting switch 24 from the open state to the close state represents the seat retreating condition related to the stop of the operation of the vehicle together with the open signal indicating that the key switch 22 is open. Only the change signal from the opening to closing of the getting-off switch 24 or the change signal from the closing to the opening of the key switch 22 may be used as the means for generating the retreat condition, or another appropriate signal generating means may be used for retreating. It may be used as a condition generating means.

The adjustment switch 26 includes a forward contact 26A and a backward contact 26B.
The closing signal that occurs in the signal line connected to the contact 26A when the forward contact 26A is closed indicates a sequential forward condition for moving the seat forward during the closing period. Further, the closing signal generated on the signal line connected to the contact 26B when the reverse contact 26B is closed represents a sequential backward condition for retracting the seat during the closing period.

The position detector 28 feeds back the adjusted actual position of the seat 10 and generates a pulse signal for each unit displacement of the position of the seat 10. The position detector 28 is configured to include, for example, a switch that responds to the movement of the movable portion of the speed reduction mechanism 14. The position control device 18 creates a position signal corresponding to the seat position by adding and subtracting the pulse signal from the position detector 28 in relation to the power feeding direction to the motor 12.

The role of the position control device 18 is to adjust the seat 10 in response to the occurrence of the return condition, the reverse condition, the sequential forward condition, and the sequential reverse condition, for which the position detector 28 cooperates. Determine the position signal at any time, use the position signal for adjustment as necessary, and store the position signal at the time of occurrence of the retreat condition and restrict the adjustment based on the position signal stored by the occurrence of the return condition. including.

The position control device 18 controls the operation as a seat adjustment device by executing the control program. FIGS. 3 to 5 show the structure of the control program. FIGS. 3 and 4 show a series of main routines which are repeatedly executed. FIG. 5 shows a pulse signal generated by the position detector 28. It represents an external interrupt routine executed each time it is input. The position control device 18, which is directly connected to the vehicle battery, starts execution of the main routine after setting variable information including the position signal and the output signal of the output terminal to a preset initial state from the moment of the connection. Also, at the same time as this, execution of the interrupt routine is permitted.

When the execution of the interrupt routine is started, the position control device 18 checks in step 101 whether the latest control output to the motor is forward rotation or reverse rotation, and an addition step is performed according to the check result. 102 or subtraction step 103 is performed. In addition step 102 and subtraction step 103, the position signal is added or subtracted by 1 (one pulse). When the position control device 18 is connected to the battery, if the seat 10 is moved to the rearmost position in advance, the position signal becomes the minimum (initial setting value) at the rearmost position of the seat 10 and moves from the rearmost position to the front. It shows a value that increases as it moves.

In the main routine shown in FIGS. 3 and 4, steps 104 to 109 represent control condition monitoring steps. Step 104 is a monitoring step prior to the retreat condition, and when the key switch 22 changes from insertion to non-insertion,
When the change is detected, the storing step 110 is executed.
In this storage step 110, the latest value of the position signal that is sequentially updated by the interrupt program (FIG. 5) is stored as the return position.

Step 105 is a return condition monitoring step. When the key switch 22 changes from non-insertion to insertion, when a change is detected, the position signal stored in step 110 as a return position is set as a control target for seat adjustment. .

Steps 106 and 107 are steps for monitoring the reverse condition, and when the key switch 22 is not inserted and the exit switch 24 is closed, step 112 is executed. In step 112, a predetermined value (equal to the initial setting value) corresponding to the rearmost position of the seat is set as a control target for seat adjustment.

Steps 108 and 109 are steps for monitoring the forward movement condition and the sequential backward movement condition, respectively.
When 6A is closed, the addition step 113 is performed and the backward contact 26
When B is closed, the subtraction step 114 is executed. In the addition step 113, the value of the control target already set as the control target for seat adjustment is added by a preset unit amount, and the addition result is set as a new control target. In addition step 114, the value of the control target already set as the seat adjustment control target is subtracted by a preset unit amount, and the subtraction result is set as a new control target.

In addition to the control condition monitoring / setting steps described above, the main routine includes control output generation / applying steps 115 to 117.
Have. In the error detection step 115, the difference between the actual position of the seat indicated by the position signal obtained by the interrupt routine and the set control target is calculated. Step 116 is executed when the result of the calculation has a negative sign, step 117 is executed when the result of the calculation has a positive sign, and step 118 is executed when the result of the calculation is equal to zero. In step 116, an output signal which means a power supply command for causing the drive circuit 16 to rotate the motor 12 in the forward direction is given to the drive circuit 16, and in step 117, an output signal which means a power supply command for rotating the motor 12 in the reverse direction is output. The signal is applied to the drive circuit 16. Further, in step 118, a control command for stopping the last train is given to the drive circuit 16.

The control output generation / applying steps 115 to 117 are periodically executed at high speed as the main routine is repeatedly executed, and operate so as to always match the actual position with the control target. If the step 116 or 117 is executed with a negative sign or a positive sign in the detection result of the error detection step 115, it is used in the interrupt routine to check the rotation direction of the motor.

Thus, this seat adjuster is simply an adjustment switch 26.
The position of the seat 10 can be adjusted to any position in the front-rear direction by the operation of, and when the key switch 22 is opened and the dismount switch 24 is closed, the seat 10 is moved to the rearmost position and the dismount is performed. Easy to get on and off. Also,
When the key switch 22 is closed, the seat 10 is returned to the position where the key switch 22 was opened. Therefore, the seat position during the operation of the vehicle before getting off is reproduced when the vehicle is about to start operation.

Needless to say, the present invention is not limited to the configurations and operations of the embodiments described above, and may be modified within the scope of the technical matters of the invention described in the claims.

[Brief description of drawings]

FIG. 1 is a block diagram showing the structural features of the present invention, and FIG.
1 to 5 show an embodiment of the present invention, FIG. 2 is a block diagram of the entire structure, and FIGS. 3, 4, and 5 are main components of the position control device shown in FIG. 6 is a flowchart showing a control program of the microcomputer that forms 10 ... seat, 12 ... motor, 16 ... driving circuit, 1
8 ... Position control device, 20 ... Position storage device, 22 ...
Key switch, 24 ... getting off switch, 26 ... adjustment switch, 28 ... position detector.

Front Page Continuation (72) Inventor Hisatoshi Ota 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (56) References JP 60-22538 (JP, A) JP 60-76433 (JP, A) JP-A-61-71233 (JP, A)

Claims (1)

[Claims] 1. A vehicle seat adjusting device comprising a drive device for reversibly adjusting the position of a vehicle seat in the front-rear direction of a vehicle in response to a seat position change instruction signal from the indicating device, wherein the indicating device further comprises: The vehicle is operated by operating the drive device in conjunction with the operation of an occupant or by stopping the operation of the vehicle to displace the position of the vehicle seat to a predetermined rear position, and by operating the drive device prior to the start of operation of the vehicle. The vehicle seat adjusting device is configured to generate a return signal for returning the position of the seat to the front. Further, the vehicle seat adjusting device includes a signal generating means for generating a position signal corresponding to the actual position of the vehicle seat, and the vehicle seat is Storage means for storing a position signal generated by the signal generation means prior to being displaced to the predetermined rear position by the drive device in relation to the stop of operation of the vehicle; A vehicle seat adjusting device comprising: a restricting unit that acts on a drive unit to restrict a return position of a vehicle seat prior to the start of operation of the vehicle in accordance with a position signal stored in the storage unit.