JPH0112695B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for automatically adjusting the seat position of a vehicle seat with a one-touch operation.

Conventional devices of this type store a desired seat position in a memory and automatically adjust the seat position to the position stored in the memory by one-touching a playback switch when necessary. When automatically adjusting the seat position, the seat cushion was always adjusted before the seat back was adjusted.

However, when such an automatic adjustment device is employed in a seat configured as shown in FIG. 2, the motor for adjusting the seat position may become locked. That is, the sheet in this case is
As shown in FIG. 2B, the seat cushion 61 and seat back 62 of the front seat 6 and the seat cushion 71 of the rear seat 7 are configured to be in a substantially flat state when the seat back 62 is tilted to its maximum angle. Now, when the seat position is in the state shown in Fig. 2B, if you operate the playback switch to automatically adjust to the seat position shown in Fig. 2A, which is stored in advance in the memory, the predetermined order will be changed. Accordingly, the seat cushion 61 initially tries to move rearward, but before the seat cushion 61 reaches the position stored in the memory, the seat back 62 of the front seat 6 moves backwards, and the seat cushion 71 of the rear seat 7 I came into contact with the
The motor for moving the seat cushion will lock up.

In order to solve this problem, the order in which the seat cushion and seat back are adjusted when automatically adjusting the seat position is reversed from the above, and the seat cushion is adjusted after the seat back is adjusted. However, it is still not possible to eliminate the motor lock. This is because if you operate the playback switch to automatically adjust the seat position to the seat position shown in Figure 2 B, which is stored in memory in advance, when the seat position is currently in Figure 2 A, the adjustment sequence will be adjusted in the predetermined order. Therefore, the seat bag 62 initially tries to fall backwards, but before reaching the memorized position, the seat bag 62 comes into contact with the seat cushion 71 of the rear seat 7, and the motor for moving the seat bag is locked. Resulting in.

In view of such conventional problems, an object of the present invention is to adjust the seat cushion and seat back according to the current seat position, which is stored in memory and automatically adjusted. By selecting the adjustment order, the purpose is to prevent a part of the seat from coming into contact with another seat during automatic adjustment of the seat position.

The first configuration of the present invention to achieve this purpose is as follows.
This will be explained using figures.

The first motor moves the seat cushion back and forth, and the second motor changes the angle of the seat back with respect to the seat cushion.
The positions of the seat cushion and seat back are as follows:
The current seat position is detected by the seat position detection means, and each position of the seat cushion and seat back is stored in the memory.
Store desired seat position.

The reproduction switch generates a command signal for reproducing the seat position stored in the memory, and the determining means receives the command signal from the reproduction switch and reproduces the seat position and seat position stored in the memory. The present seat position detected by the detection means is compared with the current seat position, and it is determined whether or not to reduce the angle of the seat bag with respect to the seat cushion in order to reproduce the seat position stored in the memory.

The first driving means drives the first motor so that the position of the seat cushion detected by the seat position detection means matches the position of the seat cushion stored in the memory, and the second driving means The second motor is driven so that the seat back position detected by the seat position detection means matches the seat back position stored in the memory.

As a result of the determination by the determining means, the control means operates the second driving means and the first driving means in this order when the angle is to be reduced, and operates the first driving means and the second driving means in that order when the angle is to be increased.

According to the present invention, when the angle of the seat back with respect to the seat cushion becomes smaller due to the automatic adjustment, the seat cushion is adjusted after the seat back is adjusted; When the angle with respect to the seat cushion becomes large, the seat back is adjusted after the seat cushion is adjusted, so the seat back does not come into contact with other seats during the adjustment. It is possible to eliminate the problem of the motor locking up.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 shows an electric circuit of one embodiment, in which a control circuit 3 including a digital computer 31 drives and controls the first motor 9 and the second motor 10 to adjust the seat position. .

The computer 31 is a general-purpose microcomputer that has a CPU, ROM, and RAM configured in a one-chip LSI, and reads necessary information and performs predetermined processing according to a program stored in the ROM, as is well known. , and output signals to the relays 34-37. computer 31
The information read into manual switch 8,
Automatic adjustment switch 5, slide amount detection sensor 11
and a signal from the reclining amount detection sensor 12.

The manual switch 8 consists of movable contacts 81 and 86 and fixed contacts 82 to 85, and by bringing any movable contact into contact with any fixed contact, any one of the relays 34 to 37 is activated. The movable contacts 81 and 86 are grounded so as to be energized, the relays 34 to 37 are connected to the power supply circuit 32, and the fixed contacts 82 to 85 are connected to each of the relays 34 to 37. Further, signals from the fixed contacts 82 to 85 are sent to the computer 31 via an inverter.
It is now entered into . Note that the power supply circuit 32 is connected to the battery 13 via the ignition switch 14, and is designed to generate the voltage necessary to drive the relays 34-37.

The automatic adjustment switch 5 consists of a memory switch 51 and first to fourth switches 52 to 55, all of which are momentary type switches, one end of which is grounded and the other end of which is connected to the computer 31 via an inverter. It is connected.

The slide amount detection sensor 11 is a reed switch that is turned on and off by a magnet (not shown) connected to the first motor 9.
Since the seat cushion 61 is moved back and forth, the slide amount detection sensor 11 converts the amount of back and forth movement of the seat cushion 61 into an electrical signal, and supplies this electrical signal to the computer 31 via an inverter. I will do it. Further, the reclining amount detection sensor 12 is a reed switch that is turned on and off by a magnet (not shown) connected to the second motor 10.
Since the reclining amount detection sensor 12 changes the angle of the seat back 62 with respect to the seat cushion 61, the reclining amount detection sensor 12 converts the angle of the seat back 62 with respect to the seat cushion 61 into an electrical signal, and sends this electrical signal via an inverter. It will be supplied to the computer 31.

When the relays 34 to 37 receive an output signal from the computer 31 via the buffer or receive a signal from the manual switch 8 and are energized, they switch the changeover switches 38 to 41 and switch the respective movable contacts as shown in FIG. Switch the position of the solid line to the position of the dashed line. When the relay 34 is energized and the changeover switch 38 is switched, current from the battery 13 flows through the first motor 9 in the direction indicated by arrow R, and the seat is therefore moved rearward. Further, when the relay 35 is energized and the changeover switch 39 is switched, a current flows in the direction shown by the arrow F to the first motor 9, and the seat is moved forward. Furthermore, when the relay 36 is energized and the changeover switch 40 is switched, a current flows in the direction of arrow D to the second motor 10, and the seat back is moved so as to increase the angle of the seat back with respect to the seat cushion. Further, when the relay 37 is energized and the changeover switch 41 is switched, a current flows in the direction of arrow U to the second motor 10, and the seat bag is moved so that the angle of the seat bag with respect to the seat cushion becomes small.

Note that power is constantly supplied to the computer 31 by a power supply circuit 33 that is directly connected to the battery 13 without going through the ignition switch 14.

Next, the action will be explained.

First, by arbitrarily operating the manual switch 8, the seat position can be arbitrarily adjusted. That is, the movable contact 8 of the manual switch 8
1 to the fixed contact 82 or 83,
When the relay 34 or 35 is energized and the seat can be moved backward or forward, and when the movable contact 86 is brought into contact with the fixed contact 84 or 85, the relay 36 or 37 is energized and the seat can be moved backward or forward. You can make the angle larger or smaller. When adjusting the seat position to a desired state by operating the manual switch 8 in this way and storing this seat position, the memory switch 51 of the automatic adjustment switch 5 is turned on, and then, for example, the first switch is turned on. By turning on switch 52, the current seat position can be stored in the memory location corresponding to first switch 52. That is, this is done by storing the current counts of the counters that count the number of pulse signals from the slide amount detection sensor 11 and the reclining amount detection sensor 12 as reference values. Here, the count value of the counter that counts the pulse signal of the slide amount detection sensor 11 represents the amount of back and forth movement of the seat, and the count value of the counter that counts the pulse signal of the recline amount detection sensor 12 represents the amount of movement of the seat relative to the seat cushion of the seat. represents an angle.

After that, operate the manual switch 8 again to select another seat position, and when you want to memorize this seat position, turn on the memory switch 51 of the automatic adjustment switch 5, and then, for example, select a second seat position. By turning on the switch 53, the current seat position can be stored in the memory location corresponding to the second switch 53, similarly to the first switch 52 described above.

In this way, a total of four seat positions can be stored in the memory by the first to fourth switches.

Next, when reproducing the memorized seat position, one of the first to fourth switches 52 to 55 of the automatic adjustment switch 5 corresponding to the seat position to be reproduced is turned on. The seat position stored in correspondence with the switch can be automatically reproduced.

The above-mentioned sheet position storage and reproducing operations are accomplished by executing a program by the computer 31, and the reproducing operation program is shown in the flowchart of FIG.

In this playback processing routine, steps S1 to S
4, it is monitored whether any one of the first to fourth switches 52 to 55 is turned on. If none of the switches is operated, negative judgments are made in all steps S1 to S4, and the processing of this regeneration processing routine is ended. 1st to 4th
When any of the switches 52 to 55 is turned on, steps S1 to S4 are performed.
If an affirmative determination is made in one of the steps, the seat position stored in the memory corresponding to the operated switch is called up in steps S5 to S8.

Next, in step S9, the current seat position is read from the counter. And step S
In step 10, the seat back angle in the current seat position is compared with that in the seat position recalled from the memory, and it is determined whether the seat back angle should be reduced in order to reproduce the stored seat position. Determine.
When the value obtained by subtracting the seat back angle Db of the current seat position from the seat back angle Mb of the currently memorized seat position becomes smaller than zero, in order to play back the stored seat position, This is a case where the angle of the seat back is to be made small. In this case, an affirmative judgment is made in step S10, and the process proceeds to step S15.
When the result of subtraction is greater than zero, the seat back angle is increased in order to reproduce the stored seat position. In this case, a negative determination is made in step S10, and the process proceeds to step S11. .

In step S15, the relay 37 is energized, the changeover switch 41 is switched, and the second motor 10 is driven so that the seatback angle becomes small. Then, in step S16, the second motor 10 is driven until the seat back angle of the current seat position becomes equal to the seat back angle of the stored seat position, and when the seat back angle becomes equal, the second motor 10 is stopped. . Next, in step S17, the relay 34 or 35 is energized to switch the changeover switch 38 or 39,
The first motor 9 is driven. In step S18,
The first motor 9 is driven until the current longitudinal position of the seat cushion becomes equal to the longitudinal position of the seat cushion in the stored seat position, and when the position becomes equal, the first motor is stopped. Although not shown in FIG. 4, when driving the first motor 9, the seat at the current seat cushion position Dc and the stored seat position is used to determine the driving direction. It is necessary to compare the position of the cushion with Mc and clarify the positional relationship.

Further, in steps S11 and S12, the first motor 9 is driven to move the seat cushion in the same manner as in steps S17 and S18. Furthermore, in step S13, the relay 36 is energized, the changeover switch 40 is switched, and the second motor 10 is driven so that the angle of the seat back is increased. Then, in step S14, the second motor 10 is driven until the seat back angle of the current seat position becomes equal to the seat back angle of the stored seat position, and when the seat back angle becomes equal, the second motor 10 is stopped. do.

In this way, in the regeneration processing routine of the present invention,
When reproducing the stored seat position, the first motor 9 and the second motor
Since the driving order of the motor 10 is changed, no matter what the relationship between the current seat position and the stored seat position is, the seat back may interfere with the rear seat, causing the seat cushion and the motor that moves the seat back to interfere with each other. will no longer be locked. For example, when the current seat position is at the position shown in FIG. 2B and the stored seat position is at the position shown in FIG. Therefore, the second motor 10 and the first motor 9 are driven in this order, and accordingly, the seat bag 62 and the seat cushion 61 are moved in that order, and during playback, the seat bag 62 moves against the seat cushion 7 of the rear seat 7.
It never comes into contact with 1. Further, when the current seat position is at the position shown in FIG. 2A and the stored seat position is at the position shown in FIG. 2B,
During the regeneration process, since the angle of the seat back during regeneration is increased, the first motor 9 and the second motor
The motor 10 drives the seat cushion 61 and the seat back 62 in that order, so that the seat back 62 does not come into contact with the seat cushion 71 of the rear seat 7 during playback.

In addition, in the above embodiment, the slide amount detection sensor 11, the reclining amount detection sensor 12,
Counter in computer 31 and step S9
The process corresponds to the sheet position detection means of the present invention, and similarly, the first to fourth switches 52 to 55 are used as playback switches, the process of step S10 is used as a determination means, and step S11 is used as a determination means. ，
Processing of S12, S17, S18, relays 34, 3
5. The changeover switches 38 and 39 switch the first drive means to perform the processes of steps S13 to S16, and to switch the relay 3
6, 37 and changeover switches 40, 41 correspond to the second driving means, and the processing in steps S10 to S18 corresponds to the control means, respectively.

Although one embodiment of the present invention has been described above,
The present invention is not limited to this embodiment, and includes various embodiments within the scope of the claims. For example, the first motor and the second motor may be electric motors. Alternatively, a hydraulic or pneumatic motor may be used. Further, the seat position detection means may be one that directly detects the position of the seat cushion or seat bag. Furthermore, the device of the present invention can also be constructed from analog or digital dedicated hard circuits.

[Brief explanation of drawings]

Figure 1 is a complaint correspondence diagram, Figure 2 is an explanatory diagram for explaining the seat position, and Figure 3 is
A block diagram showing an electric circuit of an embodiment of the present invention,
FIG. 4 is a flowchart showing a part of the program of the computer of FIG. 3...Control circuit, 31...Computer, 3
4, 35, 36, 37...Relay, 38, 39,
40, 41...Selector switch, 5...Automatic adjustment switch (playback switch) 51...Memory switch,
52...first switch, 53...second switch,
54...Third switch, 55...Fourth switch,
6...Front seat, 7...Rear seat, 61,7
1... Seat cushion, 62, 72... Seat bag, 8... Manual switch, 81, 86... Movable contact, 82, 83, 84, 85... Fixed contact,
9...first motor, 10...second motor, 11...
...Slide amount detection sensor, 12...Reclining amount detection sensor, 13...Battery, 14...Ignition switch.

Claims (1)

[Claims] 1. A first motor that moves the seat cushion back and forth; a second motor that changes the angle of the seat back with respect to the seat cushion; and a second motor that detects the respective positions of the seat cushion and the seat back, and determines the current seat position. seat position detection means for detecting the position of the seat; a memory for storing each position of the seat cushion and seat back to store a desired seat position; and a command signal for reproducing the seat position stored in the memory. Receives a command signal from the regeneration switch, compares the seat position stored in the memory with the current seat position detected by the seat position detection means, and compares the current seat position stored in the memory. determining means for determining whether or not to reduce the angle of the seat bag with respect to the seat cushion in order to reproduce the seat position; and a memory storing the position of the seat cushion detected by the seat position detecting means. the first so that it matches the position of the seat cushion.
a first driving means for driving the motor; a second driving means for driving the second motor so that the position of the seat back detected by the seat position detection means matches the position of the seat back stored in the memory; and determination. As a result of the determination by the means, when the angle is made smaller, the second drive means and the first drive means are operated in this order, and when the angle is increased, the first drive means and the second drive means are operated in that order. Automatic seat position adjustment device for vehicle seats.