JP2562441Y2 - Seat control device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a seat control device which is mounted on a vehicle and controls the attitude of a seat.

[0002]

2. Description of the Related Art In recent years, various techniques have been developed for controlling the seat attitude of a vehicle to an occupant's preferred attitude using an actuator such as a motor. For example, Japanese Utility Model 60-1573
Japanese Patent Publication No. 38 discloses a technique for automatically adjusting a seat by calculating an optimal seat position according to the height when the driver sets the height.

[0003]

Some seat control devices of this type employ a technique for controlling the posture of the seat to an initial state prior to boarding so that the occupant can get on smoothly. The initial state refers to, for example, a state where the slider of the seat is retracted to the rear limit point. In this technique, a timer unit is used, and the actuator is biased toward the initial state for a predetermined time by the timer unit. However, conventionally, while the timer unit is operating, the position of the seat cannot be changed by manually operating the switch, and it is necessary to slightly wait for the stop operation of the timer unit even after the control of the seat position is completed to the initial state. There was.
This type of seat control device is disclosed in Japanese Utility Model Laid-Open No. 60-157.
As disclosed in Japanese Patent Publication No. 338, two relays are required for one actuator such as a motor, and a large number of relays is required. For example, when four actuators such as motors are provided, it is necessary to provide eight relays.

[0004]

The present invention provides the following means for solving the above-mentioned problems. First, a first invention aims to enable manual operation at the same time that the seat attitude is controlled to an initial state, and to output a door signal by detecting opening and closing of a door; A timer unit that outputs a timer signal in response to a door signal from the relay unit; a relay that urges the actuator to an initial state side in response to the timer signal from the timer unit; an actuator that changes the position of the seat; A limit switch for stopping the actuator at a position corresponding to the position change limit point of the seat, and outputting a stop signal to the timer unit, wherein the timer unit responds to a stop signal from the limit switch by the timer signal. And a seat control device for stopping the output of the seat.

A second object of the present invention is to reduce the number of relays for urging the actuator, and to provide a switch having a neutral position and two operation positions and a switch having two operation positions. A logic circuit that outputs a first excitation signal and a second excitation signal in response to operation to one of the operation positions; and a logic circuit that is energized in response to the first excitation signal output by the logic circuit. A relay device including a first relay group for determining an actuator and a second relay group for determining an energizing direction in response to a second excitation signal;
There is provided a seat control device including: an actuator that receives a bias from the relay device and changes a posture of a seat in a direction corresponding to an operation position of the switch.

[0006]

First Embodiment FIGS. 1 to 3 show a first embodiment according to the first invention, and show a seat control device for controlling the posture of a seat to an initial state before boarding. Is shown.
In FIG. 1, reference numeral 1 denotes a door switch that detects opening and closing of a door and outputs a door signal. The door switch 1 is a switch that outputs a trigger pulse-like door signal when the door is opened and closed. 2 is connected to the door switch 1,
The timer unit outputs a timer signal in response to a door signal from the door switch 1. The timer unit 2 is configured by connecting an IC (model number: μPD4538 / manufacturer name: NEC, etc.) 2a for a monostable multivibrator, a transistor 2b, resistors 2c to 2j, and capacitors 2k and 2l. The IC 2a has the function shown in the truth table of FIG. In the figure, columns A1 and A2 indicate terminals A of the IC 2a.
1 shows input levels of A2. Similarly, the columns of B1 and B2 indicate the input levels of the terminals B1 and B2 of the IC 2a,
Columns 1 and C2 indicate the input levels of the terminals C1 and C2 of the IC 2a. Further, the column of O2 indicates the terminal O2 of IC2a.
And the column of O1 indicates the terminal O of the IC 2a.
1 indicates the output level. Furthermore, the rows of a, b and c indicate the output levels of the terminals O2 and O1 corresponding to the input levels of the terminals A1, A2, B1, B2, C1 and C2 of the IC 2a. The timer section 2 has a function of stopping the output of the timer signal in response to a stop signal from the limit switch 5 described later.

[0007] 3 is connected to the timer unit 2,
This is a relay that urges the actuator 4 to an initial state in response to a timer signal from the controller. The relay 3 includes a coil 31
a to 31h, movable contact pieces 32a to 32h, normally closed contact 33a
To 33h and normally open contacts 34a to 34h. 4 is
An actuator connected to the relay 3 to change the posture of the seat. The actuator 4 includes slide motors 4a and 4c for sliding the driver seat and the assist seat back and forth, and headrest motors 4b and 4d for vertically moving the respective headrests of the driver seat and the assist seat. Reference numeral 5 denotes a limit switch which is connected to the actuator 4 and stops the actuator 4 at a position corresponding to the position change limit point of the seat, and outputs a stop signal to the timer unit 2. The limit switch 5 includes retreat limit switches 5a and 5e that open when the driver seat and the assist seat reach the retreat limit point, forward limit switches 5b and 5f that open when the forward limit point is reached, and a driver seat. Lower limit switches 5c and 5g that open when each headrest of the assist seat reaches the lower limit point
And upper limit switches 5d and 5h which are opened when the upper limit point is reached.

Reference numeral 6 denotes a switch for manually operating the posture of each sheet. The switch 6 is in the neutral position and 2
An automatic reset type switch having two operation positions,
It comprises slide switches 6a and 6c for moving the driver seat and the assist seat forward and backward, and headrest switches 6b and 6d for raising and lowering the headrest of each seat. Slide switch 6
a, 6c and the headrest switches 6b, 6d include the movable contact pieces 6e to 6h, the forward fixed contacts 6i, 6m, the backward fixed contacts 6j, 6n, the rising fixed contacts 6k, 6o, and the falling fixed contacts 61, 6p. Have. 7 is a DC power supply, 8
a to 8d and 9a to 9d are diodes.

Next, the operation of the first embodiment will be described with reference to a time chart shown in FIG. Each part (A1) to (O2) in the time chart of FIG. 3 is a time t at the terminals A1 and O2 of the IC 2a of the timer unit 2 shown in FIG.
3 shows a potential V (volt) waveform with respect to (seconds). The “L” level and the “H” level refer to a low potential and a high potential. First, when the door is opened at the time t1 (second), the door switch 1 is switched from the time t1 (second) to the time t2.
(Seconds), and an "L" level door signal is input to the terminals C1 and B2 of the IC 2a. When the terminal C1 goes to the "L" level, the condition of the row of C in the truth table shown in FIG. 2 is satisfied, and the terminals O1 and C2 go to the "H" level at time t1 (second). When terminal C2 is at "H" level and terminal B2 is inverted to "L" level, FIG.
The condition of the row of C in the truth table shown in FIG.
At (seconds), the terminal O2 outputs a timer signal of "H" level. The timer unit 2 turns on the transistor 2b according to the timer signal, and the coil 31b of the relay 3
31d, 31f and 31h are excited. As a result, each of the motors 4a to 4d of the actuator 4 operates at the time t1.
At (seconds), the operation starts in the initial state. The initial state side means a retreating side in the slide motors 4a and 4c and a descending side in the headrest motors 4b and 4d.

Next, at time t3 (second), the backward limit switches 5a and 5e and the descending limit switch 5c
And 5g are all opened, the limit switch 5 outputs a "H" level stop signal to the timer unit 2. When the IC 2a of the timer unit 2 receives the "H" level stop signal at the terminal A1, the condition of the row a of the truth table shown in FIG. 2 is satisfied, and at the time t3 (second), the terminal O1 sets " L "level. When the terminal C2 goes low when the terminal O1 goes low, the condition for traversing C in the truth table shown in FIG. 2 is satisfied. As a result, the terminal O2 of the IC 2a becomes the "L" level at the time t3 (second). That is, the timer unit 2 receives the stop signal from the limit switch 5 at the time t3 (second) and stops deriving the timer signal at the same time. Therefore, time t3 (second)
Thereafter, the switch 6 can be manually operated to control the seat attitude to a desired attitude.

Incidentally, due to a failure of the limit switch 5 or the like,
When the stop signal of the “H” level is not input from the limit switch 5 to the timer unit 2 at the time t3 (second), the IC 2a of the timer unit 2 is indicated by a virtual line at the portion (O2) in the time chart of FIG. As shown, the derivation of the timer signal is stopped at time t4 (second).

[0012]

Second Embodiment FIG. 4 is a view showing a second embodiment according to the second invention. In FIG.
The limit switch 5, the switch 6, and the DC power supply 7 are the same as those described in the first embodiment, and the description is omitted. First, 10 is connected to the switch 6,
And a logic circuit that outputs a first excitation signal and a second excitation signal in response to an operation to one of the two operation positions. Reference numeral 11 denotes a first relay group 11a which is connected to the logic circuit 10 and determines the actuator 4 to be energized in response to the first excitation signal output from the logic circuit 10, and responds to the second excitation signal. And a second relay group 11b that determines the biasing direction. The logic circuit 10 is configured by connecting first to fourth NOR gates 10a to 10d that output a first excitation signal, and fifth and sixth NOR gates 10e and 10f that output a second excitation signal. Also the relay device 11
Are coils 111a to 111d, movable contact pieces 112a to 1
12d, normally closed contacts 113a to 113d and normally open contact 11
4a to 114d, a first relay group 11a, coils 111e and 111f, movable contact pieces 112e and 112f,
Normally closed contacts 113e and 113f and normally open contacts 114e and 1
It is connected to the second relay group 11b composed of 14f.

Next, the operation of the second embodiment will be described. For example, switch 6 is used to advance the driver's seat.
By operating the slide switch 6a, the movable contact piece 6e is connected to the forward fixed contact 6i. The first NOR gate 10a of the logic circuit 10 receives the "L" level potential at the input section and outputs a first excitation signal to the output section. The first excitation signal excites the coil 111a in the first relay group 11a of the relay device 11. Thereby, the movable contact piece 11
2a connects to the normally open contact 114a. On the other hand, the fifth NOR gate 10e of the logic circuit 10 also receives the "L" level potential at the input section and outputs the second excitation signal to the output section. This second excitation signal is transmitted to the second relay group 1 of the relay device 11.
The coil 111e in 1b is excited. Thereby, the movable contact piece 112e is connected to the normally open contact 114e. The slide motor 4a of the actuator 4 operates the relay device 11 to operate the DC power supply 7 → normally open contact 114e → movable contact 112e → movable contact 112c → normally closed contact 113c.
→ Reverse limit switch 5a → Slide motor 4a →
The power is supplied through the path of the forward limit switch 5b → the normally open contact 114a → the movable contact 112a → the movable contact 112f → the normally closed contact 113f → the ground, and rotates forward. In the case of retreating the driver's seat or performing other attitude control, the first relay group 11a and the second relay group 11b of the relay device 11 are also connected to the first relay group 11b derived from the logic circuit 10 as described above. Upon receiving the excitation signal and the second excitation signal, the actuator 4 is energized.

[0014]

[Effects of the Invention] The invention has the following effects. First,
In the first invention, the actuator is controlled by a timer signal from a timer unit to control the seat attitude to an initial state before boarding, and the actuator is controlled by a limit switch in accordance with a seat attitude change limit point. In the sheet device configured to stop the sheet, the timer section stops the output of the timer signal in response to the stop signal of the limit switch. Manual operation becomes possible. Further, the second invention is directed to responding to the operation of the switch to one of the two operation positions, and to the first operation.
Logic circuit that outputs an excitation signal and a second excitation signal, a first group of relays that determines an actuator to be energized in response to the first excitation signal output by the logic circuit, and a second excitation A second determining the biasing direction in response to the signal;
And a relay device having the above-mentioned relay group, the number of relays for urging the actuator can be reduced.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram showing a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a truth table showing functions of an IC 2a shown in FIG.

FIG. 3 is a time chart showing an operation of the circuit shown in FIG. 1, showing a potential V (volt) waveform of each part with respect to time t (second).

FIG. 4 is an electric circuit diagram showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door switch 2 Timer part 3 Relay 4 Actuator 5 Limit switch 10 Logic circuit 11 Relay device 11a 1st relay group 11b 2nd relay group

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-104432 (JP, A) JP-A-3-200400 (JP, A) Fully open 1984-59,133 (JP, U) Really open 1987 112666 (JP, U) Japanese Utility Model Showa 60-67245 (JP, U) Japanese Utility Model Showa 60-157338 (JP, U) Japanese Utility Model Utility Model 1-167927 (JP, U)

Claims (2)

(57) [Scope of request for utility model registration] 1. A seat control device for controlling the posture of a seat in advance to an initial state before boarding, comprising: a door switch for detecting opening and closing of a door and outputting a door signal; A timer unit for outputting a timer signal in response to a door signal from the door switch; a relay connected to the timer unit, for urging the actuator to an initial state in response to the timer signal from the timer unit; An actuator connected to the relay to change the posture of the seat; and an actuator connected to the actuator and stopping the actuator at a position corresponding to the limit point of changing the posture of the seat,
A limit switch that outputs a stop signal to the timer unit, wherein the timer unit stops outputting the timer signal in response to a stop signal from the limit switch. Seat control device. 2. A seat control device for controlling a seat position according to a switch operation, comprising: a switch having a neutral position and two operation positions; A logic circuit that outputs a first excitation signal and a second excitation signal in response to an operation to one of the operation positions; and a first excitation signal connected to the logic circuit and output by the logic circuit. A relay device having a first relay group that determines an actuator to be energized in response, and a second relay group that determines an energizing direction in response to a second excitation signal; A seat control device, comprising: an actuator connected to the switch device, the actuator being configured to change the posture of the seat in a direction corresponding to an operation position of the switch by being biased by the relay device.