JPH0755638B2 - Power seat control device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a control device for a vehicle power seat.

(Prior art and problems to be solved) A vehicle seat, especially a driver's seat is
A slide adjuster that can be moved forward and backward is provided so that an optimal posture can be ensured according to tastes and the like, or that it is easy to get on and off in a narrow parking lot or the like. This slider adjuster is generally configured to be manually operated. Further, a drive device for moving the seat back and forth through a gear system by a drive motor and a positioning mechanism for setting the position of the seat are provided, and the seat is automatically moved to a preset position by a switch operation. There is a power sheet.

By the way, in the above power seat, when the seat is automatically moved back and forth by operating the switch, the control device may always operate on the safe side even if the switch is operated depending on the operating condition of the vehicle, the seating condition of the occupant, and the like. is necessary.

The present invention has been made in view of the above points, the sheet,
An object of the present invention is to provide a control device for a power seat that can be automatically moved only when a predetermined condition is satisfied.

(Means for Solving the Problems) In order to achieve the above object, according to the present invention, a seat disposed on an upper rail that slides on a lower rail is operated by operating a drive device to operate the drive device. A first switch for detecting the wearing / releasing of a seat belt in a power seat control device of a vehicle for moving a seat to a rearmost position and moving the seat to a desired position within a range of a preset position set by a seat positioning device. And a second switch for detecting the operation / release of the handbrake, and a third switch for detecting the operation / stop of the engine,
The main switch when the first switch detects mounting, or when the first switch detects release and the second switch detects release and the third switch detects operation. When the switch is turned on, the drive device is operated for the input time, and when the first switch detects the release and the third switch detects the stop, or the first switch detects the release. When the third switch detects the operation and the second switch detects the operation, and the main switch is turned on, the seat is moved to the rearmost retracted position or the preliminary position regardless of the time when the main switch is turned on. It is configured to include a control circuit that operates the drive device until it is moved to a set position.

(Operation) The drive device is driven by manually operating the main switch to move the seat 1 regardless of the operating state of the vehicle. In addition, the control circuit, when the first switch detects the mounting, or when the first switch detects the release and the second switch detects the release and the third switch detects the operation, the main circuit When the switch is turned on, the drive device is operated only for the time when the switch is turned on, and when the first switch detects the release and the third switch detects the stop, or the first switch detects the release and the first switch detects the release. When the third switch detects the operation and the second switch detects the operation,
When the main switch is turned on, the drive device is operated until the seat is moved to the rearmost retracted position or the preset position regardless of the time when the main switch is turned on.

(Embodiment) An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1 and FIG. 2, a seat frame 2 for holding a seat 1 is arranged on a floor surface 3 of the vehicle along the front-rear direction.
The upper rails 5 and 5 are slidably mounted on the two lower rails 4 and 4 which are arranged and fixed in parallel, and the rear end portions on both sides project to the rear ends of the upper rails 5 and 5. A bracket 6 (only one side is shown in FIG. 2) provided for rotation is pivotally supported, and a front portion is supported by a swing arm 7.

This swing arm 7 has an upper shaft 8 as shown.
And a lower shaft 9 having a substantially U shape. Each end surface of both side portions 9a and 9b of the lower shaft 9 is fixed to the upper shaft 8 by welding, and the central portion 9c is parallel to the upper shaft 8. And the upper shaft 8
Pierces the front portion of the seat 1 so as to be rotatable in its width direction,
Both ends are rotatably supported on both sides of the seat frame 2. A central portion 9c of the lower shaft 9 is rotatably supported at a predetermined position on the floor surface 3 via a bracket 10. The swing arm 7 is rotatable forward or backward as indicated by an arrow A or B in FIG. 2 with the central portion 9c of the lower shaft 9 as a fulcrum. Therefore, as the swing arm 7 rotates in the arrow A or B direction, the seat frame 2, that is, the seat 1, can move forward or backward on the lower rails 4, 4.

A drive motor 11 is housed in the seat 1 and fixed to the seat frame 2. A pinion 12 is mounted on the output shaft of the drive motor 11 as shown in FIG.
On the other hand, a fan-shaped rack 13 is fixed to one side 9a of the lower shaft 9 of the swing arm 7 and meshes with the pinion 12. The fan-shaped rack 13 is rotated by the rotation of the pinion 12, and the pinion 12 rotates in the direction of the arrow CC, so that the rack 13
When one end of the seat reaches the position shown by the chain double-dashed line in FIG. 3 where the seat 1 meshes with the pinion 12, the swing arm 7 advances the seat 1 in the direction of arrow A, that is, forward to the maximum position. Also,
On the contrary, when the pinion 12 rotates in the direction of arrow C and the other end of the rack 13 reaches the position shown by the solid line that meshes with the pinion 12, the swing arm 7 moves the seat 1 in the direction of arrow B, that is, backward to the maximum position. Retreat.

A seat positioning device 20 is disposed on one side of the seat frame 2 (FIG. 1). The positioning device 20 includes a lever 21 for setting the position of the seat 1 and a limit switch 22 (FIG. 4) for detecting the position. The lever 21 is fixed to the upper end of a slider (not shown) that is slidably arranged on the upper rail 5 within the moving range of the seat 1, and the lever 21 is moved to an arbitrary position to position the seat 1. To be able to do. Further, the limit switch 22 is fixed to a predetermined position of the lower rail 4 via a bracket, and a projection formed on the slider can press the operating element.

This limit switch 22 has a contact 22a on the "forward" side,
It has two contacts with the "reverse" side contact 22b (Fig. 4), and the "forward" contact 22a is pressed by the protrusion of the slider at the preset position of the seat 1,
It switches from on to off, and when the seat 1 retracts from the preset position and the protrusion of the slider separates from the actuator, it switches from off to on. Further, the contact 22b on the "back" side is always on.

Further, the seat 1 is provided on the upper surface of the one front side of the seat frame 2.
Main switch 23 for automatically moving forward or backward
Is provided.

Further, as shown in FIG. 4, a seat belt switch 25 is turned on when the seat belt is attached to the seat belt buckle (not shown), and is turned on when the seat belt is removed, and the hand brake (not shown) has the hand brake switch 25. A handbrake switch 26 is provided that is turned on when is pulled and turned off when released. And these drive motors
11, limit switch 22, main switch 23, seat belt switch 25, hand brake switch 25 are control circuits
Connected to 30.

In FIG. 4, the contacts 22a and 22b of the limit switch 22 are connected to the input terminals 30a and 30b of the control circuit 30, and the contact 22c is a fuse F.
Connected to power supply + B via 1. In addition, the control circuit 3
The 0 input terminal 30c is grounded, and the input terminal 30d is connected to the engine switch via the L terminal of the alternator, the diode D, the charge lamp 27, and the fuse F2.
The input terminal 30e is grounded via the brake level switch 28, and the input terminal 30f is grounded via the handbrake switch 26.

The contact 23a on the "forward" side of the main switch 23 is the control circuit 30.
Input terminal 30a, the contact 23b on the "back" side is the input terminal 30b
Connected to the input terminal 30 via a resistor R.
The common contacts 23e and 23f are connected to c and are connected to the output terminals 30g and 30h of the control circuit 30. The contact 23e is also connected to the output terminal 30i. The connection terminals of the drive motor 11 are connected to the output terminals 30g and 30h of the control circuit 30, and the contacts 25a and 25b of the seat belt switch 25 are connected to the output terminals 30i and 30j.

The output terminal 30j of the control circuit 30 is connected to the collector of the transistor Tr1 via the diodes D1 and D2, and is also connected to the line 31 via the resistor R1, and the emitter of the transistor Tr1 is an input terminal via the line 32. It is connected to 30c. The base of the transistor Tr1 is connected to the line 31 via the resistor R8 and is also connected to the output terminal of the comparator 33. The collector of the transistor Tr2 is connected to the base of the transistor Tr1 and the emitter is connected to the line 32. Further, the base is connected to the line 32 via the resistor R12, and the input terminal 30d of the control circuit 30 via the diode D3, the resistor R10, and the diode D4, and the input terminal 30e via the diodes D5 and D6. It is connected to the. Also, diodes D5 and D6
The connection point with is connected to the input terminal 30f.

The (+) input terminal of the comparator 33 is connected to the connection point of the voltage dividing resistors R5 and R6 connected between the lines 31 and 32, and the (−) input terminal of the comparator 34 is connected via the resistor R4. It is connected to the output terminal and is also connected to the line 32 via the capacitor C. A resistor R7 is connected between the (+) input terminal and the output terminal of the comparator 33, and a resistor R3 is connected between the line 31 and the output terminal of the comparator 34.
Are connected.

The (+) input terminal of the comparator 34 is the contact 23 of the main switch 23.
Connected to the connection point of d and resistor R, the (-) input terminal is line 3
It is connected to the connection point between the voltage dividing resistors R2 and Ra connected between 1 and 32. A Zener diode ZD is connected between the lines 31 and 32 in parallel with the voltage dividing resistors R2 and R3.

Also, a holding coil for self-holding the main switch 23.
One end of 23s is the collector of transistor Tr1 and the other end is a resistor
It is connected to the connection point between the resistor R10 and the diode D4 via R9, and the other end of the holding coil is further connected to the anode side of the diode D1.

Then, the control circuit 30 operates in the operation modes shown in Table 1, that is, whether the seat belt is worn (ON) or released (OFF), the engine switch is turned ON or OFF, and the hand brake is activated (ON) or released (OFF). The drive motor 11 is driven in accordance with the operation modes 1 to 8 corresponding to each state to move the seat 1 forward or backward.

In Table 1, “manual” and “auto” of the power seat indicate “manual operation” and “automatic operation”, respectively, and the symbol “◯” indicates operable and the symbol “x” indicates inoperable. The manual operation can be performed in all modes, and the automatic operation can be performed only in the safe modes 5, 7, and 8.

In other words, Mode 5 is, for example, when the driver gets off the engine without turning off the engine, such as delivery and collection, and the hand brake is activated (ON) while the engine switch is in the ON state, so that the seat belt is released. This is the case of cancellation (removed) (OFF). Mode 7 is when the vehicle is parked, that is, the engine switch is OFF, the handbrake is activated (ON), and the seat belt is released (OFF). Mode 8 is when the vehicle is stopped, that is, the engine switch is turned off and the handbrake is turned on. Is released (OFF, of course, the foot brake is operating) and the seat belt is released (OFF).

The operation will be described below.

First, in the operation mode 1 of Table 1, for example, when the vehicle is temporarily stopped due to "waiting for a signal" or the like, the engine switch is on and the hand brake is operated (O
N) and the seat belt is on (ON). Therefore, in FIG. 4, the seat belt switch 25
Is off and the handbrake switch 26 is on. Further, the position of the sheet 1 (FIG. 1) is determined by the positioning device 20.
Therefore, for example, it is assumed that the position is set to a substantially central position within the movement range. When the seat 1 is in this set position, the limit switch 22 of the positioning device 20 turns off the contact 22a on the "forward" side as shown in FIG. The contact 22b on the "back" side is on.

When the main switch 23 is pushed to the "reverse" side in order to move the seat 1 backward in this state, the contacts 23e and 23f are connected to the contacts 23c and 23b, respectively, and the contacts 22c → 22b → the main switch of the limit switch 22 from the power supply + B. 23 contacts 23b
→ 23f → drive motor 11 → contact 23e → contact 23c → ground Drive current flows in the path indicated by the dotted arrow, and the drive motor
11 rotates in the reverse direction. As a result, the swing arm 7 rotates backward and the seat 1 retracts.

Main switch when seat 1 retracts to the rearmost position
When the pressing of 23 is released, the contacts 23e and 23f are separated from the contacts 23c and 23b to be switched off, and the drive motor 11 is stopped. As a result, the seat 1 can be retracted to the rearmost position. Further, in the limit switch 22 of the sheet positioning device 20, the contact point 22a on the "advance" side is turned on when the sheet 1 moves backward from the set position.

Next, when the seat 1 is in the retracted position, the main switch
When 23 is pushed to the "forward" side, contacts 23e and 23f are contacted.
As a result, the drive current flows from the power supply + B to the contact point 22a of the limit switch 22 → the contact point 23a of the main switch 23 → the drive motor 11 → the contact point 23d → the path indicated by the solid arrow of the ground. Motor 11 rotates forward. As a result, the swing arm 7 (FIG. 1) rotates forward and the seat 1 advances.

When the seat 1 advances to reach the preset position, the actuator of the limit switch 22 is pressed by the slider of the seat positioning device 20 to be switched off. This causes the seat 1 to stop at the preset position. Of course, if the pressing force of the main switch 22 is released before reaching the preset position, the contact 23e separates from the contact 23a and is switched off.
The seat 1 stops at this position. Therefore, in the mode 1, the seat 1 can be arbitrarily advanced or retracted by the manual operation.

On the other hand, in this mode 1, the seat belt switch
25 is off, so that no drive current for the motor 11 is supplied to the line 31. Therefore, the transistor Tr1 is off, and the holding solenoid 23s of the main switch 23 remains deenergized. Therefore, the main switch 23 is not self-held on either side of the "forward" or "reverse" side, and therefore, even if the main switch 23 is pressed to either the "forward" or "reverse" side, As soon as the pressing force is released, the switch is turned off. That is, the sheet 1 is not automatically moved.

Further, when the engine switch and / or the handbrake switch 26 is on, current flows through the brake indicator 29 → brake level switch 28 → ground path and / or brake indicator 29 → diode D6 → handbrake switch 26 path, and the brake indicator 29 lights up.

Similarly, in the operation modes 2 to 4, that is, in the case where the seatbelt is worn and the seatbelt switch 25 is in the off state, the operation mode 2 in the traveling state, the operation mode 3 in the parking state, and the operation mode 4 in the stopped state. The main switch 23 is not held by itself, and the seat 1 cannot be automatically moved. In this way, in the operation modes 1 to 4 in which the seat belt is mounted and the engine switch is in the on or off state, the automatic movement of the seat 1 is disabled.

Next, in the operation mode 5, that is, the seat belt is released (OFF), the engine switch is on, the hand brake is on (ON), the hand brake switch 26 is on, In the case of dismounting without stopping, if the main switch 23 is pushed to the "reverse" side to retract the seat 1 from the preset position, the current flows from the power source + B as shown by the dotted arrow in the same manner as described above. As a result, the drive motor 11 is rotated in the reverse direction to retract the seat 1.

At the same time, part of the drive current of the motor 11 is supplied to the lines 31 and 35 via the seat belt switch 25 → diode D1. Then, the current of the line 35 flows through the route of the resistor R9 → R10 → diode D5 → hand brake switch 26 → ground, and the transistor Tr2 is held in the off state. As a result, the base potential of the transistor Tr1 becomes "high level", the transistor Tr1 is turned on, and a current flows from the line 35 through the holding coil 23s of the main switch 23 → the transistor Tr1 → the path of the ground, and the holding coil 23s is energized. Then, the main switch 23 is self-held on the “reverse” side. As a result, the seat 1 is automatically retracted even if the pressing force of the main switch 23 is released.

Further, a current flows from the engine switch in the route of the brake indicator 29 → the diode D6 → the hand brake switch 26, and the brake indicator concerned lights up.

When the seat 1 moves backward to the rearmost part, it is mechanically stopped, and the drive motor 11 is forcibly stopped accordingly. As a result, the drive current of the motor 11 increases, the input voltage of the (+) input terminal of the comparator 34 becomes higher than the reference voltage of the (−) input terminal, and the output of the comparator 34 changes from “low level”. It changes to "high level", and accordingly the voltage at the (-) input terminal side of the comparator 33 becomes higher than the reference voltage at the (+) input terminal side, and the output of the comparator 33 changes from "high level". Change to "low level".

As a result, the transistor Tr1 is turned off, the current flowing in the holding coil 23s of the main switch 23 is cut off, the holding coil is deenergized, and the self-holding of the main switch 23 is released and the switch is turned off. As a result, the supply of current to the drive motor 11 is stopped, and the motor 11 is completely stopped.

When the main switch 23 is pushed to the "forward" side in order to move the seat 1 forward from the retracted position to the preset position,
Similarly to the above, a current flows through the path indicated by the solid line arrow, the drive motor 11 rotates forward, and the seat 1 advances. At the same time, current flows through the path of the seat belt switch 25 and the diode D1, and the holding coil 23 of the main switch 23 is operated in the same manner as described above.
s is urged to hold the main switch 23 by itself. As a result, even if the pressing force of the main switch is released, the main switch 23 is held by itself on the “forward” side.

When the seat 11 reaches the preset position, the limit switch 22 is activated and turned off, and the drive motor 11 is stopped.
At the same time, the transistor Tr1 is turned off, the holding coil 23s is deenergized, and the main switch 23 is turned off. In this way, the seat 1 can be automatically moved in the operation mode 5.

Next, in the operation mode 6, that is, when the seat belt is worn, the engine switch is off, the hand brake is released and the hand brake switch 26 is off, and Since the handbrake switch 26 is off in the operation mode 5 described above, the diode D1 is passed through the seatbelt switch 25.
→ resistor R9 → R10 → diode D3 in the path of transistor Tr2
A current flows through the transistor Tr2 and the transistor Tr2 is turned on. As a result, the base potential of the transistor Tr1 becomes "low level", the transistor Tr1 is held in the off state, and the holding coil 23s is held in the deenergized state. Therefore, the main switch 23 is not held by itself, and the automatic movement of the seat 1 is disabled. That is, in the operation mode 6, it is impossible to automatically move the seat 1.

Next, in the case of the operation mode 7, that is, when the seat belt is released, the engine switch is in the off state, and the handbrake is in the operation state, the operation mode 6 is compared with the case of the operation mode 6 described above. , Seat belt switch
A current flows from 25 through diode D1 → resistor R9 → diode D4 → L terminal of the alternator. As a result, the transistor Tr2 is held in the off state and the transistor Tr1
Turns on. As a result, similarly to the case of the operation mode 5, the holding coil 23s of the main switch 23 is energized so that the main switch 23 is self-held and the seat 1 can be automatically moved.

In the operation mode 8, that is, when the seat belt is released, the engine switch is off, and the hand brake is released, the vehicle is in a stopped state, the main switch is the same as in the operation mode 7. 23 is held by itself, and the sheet 1 can be automatically moved.

Thus, the seat 1 can be automatically moved only when the vehicle is in a safe driving state even if the seat 1 is moved.

(Effects of the Invention) As described above, according to the present invention, the seat disposed on the upper rail that slides on the lower rail is moved to the rearmost position of the seat by operating the drive device by operating the main switch. In a control device for a power seat of a vehicle for moving to a desired position within a range of a preset position set by a retracted position and a seat positioning device, a first switch for detecting attachment / detachment of a seat belt and an operation of a hand brake A second switch for detecting the release and a third switch for detecting the operation / stop of the engine are provided, and when the first switch detects attachment, or the first switch detects the release. In addition, when the second switch detects the release and the third switch detects the operation, when the main switch is turned on, the main switch is turned on for the time when the main switch is turned on. When the driving device is operated, the first switch detects the release and the third switch detects the stop, or the first switch detects the release and the third switch detects the operation. Further, when the operation of the second switch is detected, when the main switch is turned on, the drive device is operated until the seat is moved to the rearmost retracted position or the preset position regardless of the time when the main switch is turned on. Since it has a control circuit to operate it, the seat can be automatically moved only when the vehicle is in a safe driving state even if the seat is moved, improving the safety and operability of the power seat. There is an effect that it can be further increased.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a power seat to which a control device for a power seat according to the present invention is applied.
1 is a side view of the seat of FIG. 1, FIG. 3 is a view showing details of a gear system of a drive device for the power seat of FIG. 1, and FIG. 4 is a control circuit of a power seat control device according to the present invention. It is a detailed view showing one example. 1 ... Power seat, 2 ... Seat frame, 3 ... Floor surface, 4 ... Lower rail, 5 ... Upper rail, 7 ... Swing arm, 11 ... Drive motor, 12 ... Pinion,
13 …… Fan-shaped rack, 20 …… Sheet positioning device, 22…
… Limit switch, 23 …… Main switch, 25 …… Seat belt switch, 26 …… Handbrake switch,
30 ... Control circuit.

Claims (1)

[Claims] 1. A seat provided on an upper rail that slides on a lower rail is operated by operating a main switch to actuate a drive device to set the seat to the rearmost position and a seat positioning device. In a control device for a vehicle power seat that is moved to a desired position within a range of a set position, a first switch for detecting attachment / detachment of a seat belt, a second switch for detecting actuation / release of a handbrake, A third switch for detecting the operation / stop of the engine, and when the first switch detects mounting, or the first switch detects release and the second switch detects release. Further, when the operation of the third switch is detected, when the main switch is turned on, the drive device is operated for the time of turning on, and the first switch is turned on. Switch detects the release and the third switch detects the stop, when the switch is turned on, or the first switch detects the release and the third switch detects the operation, and the second switch When the switch detects the operation, the control circuit operates the drive device until the seat is moved to the rearmost retracted position or the preset position regardless of the time when the main switch is turned on. Characteristic power seat control device.