JPH01101922A - Sheet - Google Patents

Abstract

PURPOSE: To secure safety for a person sitting on a seat or the like by preventing the burning of a motor by moving it oppositely to its adjusting direction for a fixed amount when adjusted speed is lower than a set value in the case of performing the longitudinal position adjustment or the like of a head rest through motor driving. CONSTITUTION: Any one of the longitudinal position adjustment of a head rest 1, the reclination angle adjustment of a seat back 2 and the longitudinal position adjustment of an ottoman 4 is performed through motor driving at least. When the adjusted speed is lower than the set value, the motor is moved oppositely to the adjusting direction for the fixed amount. As a result, the burning of the motor can be prevented and safety for the person sitting on the seat or any person near the seat can be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a seat in which at least one of the longitudinal position adjustment of a headrest, the inclination angle adjustment of a seat back, and the longitudinal position adjustment of an ottoman is performed by motor drive.

(Conventional technology) As a conventional technique, there is a sheet shown in FIG.

In the figure, 1 is a headrest, 2 is a seat back, 3 is a seat cushion, and 4 is an Ottoman.

In this seat, headrest 1 is seat back 2.
Anteroposterior ra that moves in the anteroposterior direction (in the direction of the arrow)
WJ adjustment, inclination angle adjustment in which the seat back 2 tilts relative to the seat cushion 3 (in the arrow ■ direction), and longitudinal position adjustment in which the seatback 4 moves in the longitudinal direction relative to the seat cushion 3 (in the arrow ■ direction) These adjustments are made by driving a motor (not shown).

(Problems to be Solved by the Invention) Assume that the seat having the above configuration is installed in a place where there is a wall 5 at the rear and a desk 6 at the front, as shown in FIG. 5, for example. If the seated person moves the headrest 1, seatback 2, and Ottoman 4 without recognizing the situation, they may come into contact with a nearby wall 5 or desk 6, and the movement of the Headrest 1, Seatback 2, and Ottoman 4 may be prohibited. There is. Even so,
When operated, the motor becomes overloaded and burns out. Furthermore, even though there is a person between the wall 5 and the seat, if the seated person moves the headrest 1 or the seat back 2 without checking the rear, the person may become caught between the wall 5 and the seat. Furthermore, if the seated person moves the Ottoman 4 without checking the direction in which the seated person moves, there is a risk that the seated person's feet may get caught in the desk 6.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a seat that can prevent the motor from burning out and further ensure the safety of the seat occupant and those in the vicinity of the seat.

(Means for Solving the Problems) The present invention, which solves the above-mentioned problems, provides that at least one of the longitudinal position adjustment of the headrest, the inclination angle adjustment of the seat back, and the longitudinal position adjustment of the ottoman is performed by a motor drive. The sheet is characterized in that, when the adjustment speed is slower than a set value, the sheet is moved by a certain amount in the opposite direction to the adjustment direction.

(Function) In the seat of the present invention, when the adjustment speed is slower than the set value, the seat moves a certain amount in the opposite direction to the adjustment direction.

(Example) Next, an example of the present invention will be described using FIGS. 1 to 4. Figures 1 and 2 are flow diagrams of this embodiment;
The figure shows the circuit of this embodiment, and FIG. 4 is a diagram showing the external shape of the sheet of this embodiment. Incidentally, in FIG. 4, the same parts as those in FIG. 5 described in the conventional example are given the same reference numerals, and the description thereof will be omitted.

First, in FIG. 3, 11 is a CPU 112 that takes in data and performs various calculations, a ROM in which a program for executing CPLJll, etc. is written, and 14 a RAM in which data such as seat position is written. 15 is a headrest moving motor that moves the headrest 1 in the direction of the arrow; 16 is a driver that drives the headrest moving motor 15; 17 is a potentiometer that detects the displacement of the headrest 1; 18 is a converter that converts the analog signal of the potentiometer 17 into a digital signal. It is an A/D converter that performs conversion. 19 is a seatback tilting motor that moves the seatback 2 in the direction of the arrow ■; 20 is a driver that drives the seatback tilting motor 19; 21 is a potentiometer that detects the displacement of the seatback 2; 22 is an analog signal of the potentiometer 21. This is an A/D converter that converts the signal into a digital signal. Reference numeral 23 denotes a motor for moving the Ottoman 4 in the direction of the arrow ■; 24 a driver for driving the motor 23 for moving the Ottoman; 25 a potentiometer for detecting the displacement of the Ottoman 4; and 26 converting the analog signal of the potentiometer 25 into a digital signal. This is A/D conversion. 27 to 29 are RAM1
4 is a memory switch that executes the seat position written in. 30 is a manual switch provided corresponding to each adjustment direction of the headrest 1, seat back 2, and Ottoman 4 (6 in this embodiment). 31 is an emergency stop switch. , 32 is an alarm. Memory switches 27 to 29, manual switch 30, emergency stop switch 31, alarm 3
2 is connected to the CPU 11 via an interface circuit 33.

Next, the operation when the memory switches 27 to 29 are used will be explained using FIG. First, headrest 1,
Initial settings are performed in which the desired seat positions (set positions) of the seat back 2 and the ottoman 4 are stored in the RAM 14 (step 1). In this embodiment, three settings can be made.

Next, memory switches 27 to 3 corresponding to the three setting positions are set.
Check whether one of the 29 is turned on (step 2). If it is not turned on, monitoring will continue until it is turned on. When turned on, it is checked whether the headrest 1, seat back 2, and ottoman 4 to be moved are in the position set in step 1 (step 3). If it is the set position, go to step 8, which will be described later. If it is not at the set position, the corresponding motor among the headrest moving motor 15, seatback tilting motor 19, and ottoman moving motor 23 that is not at the set position is operated (step 4). Next, select the potentiometer 17.21 corresponding to the activated motor.
．． 25 to see if the displacement per unit time (corresponding to the adjustment speed) is slower than the set value written in the RoM 12 (step 5). If it is the set value, return to step 3. If it is slower than the set value, the alarm device 32 is activated to emit an alarm sound (step 6). Next, each motor 15
．． 19. In step 23, the activated motor is activated in the opposite direction for a certain amount of time (step 7). And each motor 15.1
9. In step 23, stop the motor that operated in the opposite direction (step 8) and return to step 2.

Next, the operation when using the manual switch 30 will be explained using FIG. 2. First, it is checked whether the manual switch 30 is turned on (step 11). If it is not turned on, monitoring will continue until it is turned on. When turned on, the motor corresponding to the turned-on manual switch 30 among the headrest moving motor 15, seat back tilting motor 19, and Ottoman moving motor 23 is operated (step 12). Next, the potentiometer 17°2
1.25, use the potentiometer corresponding to the activated motor to check whether the displacement amount per unit time (corresponding to the adjustment speed) is slower than the set value written in the ROM 12 (step 13 ). If it is the set value, the process returns to step 11.

If it is slower than the set value, the alarm 32 is activated to emit an alarm sound (step 14). Next, each motor 15.19.2
In step 3, the activated motor is activated in the opposite direction for a certain period of time (step 15). And each motor 15.19.23
The operation of the motor that operated in the opposite direction is stopped (step 16), and the process returns to step 11.

If the emergency stop switch 31 is turned on during adjustment, each motor 15, 19.23 will stop, and if the operation shown in Fig. 1 is being performed, the operation shown in Fig. 2 will be performed in step 2. If so, return to step 11.

According to the above configuration, if the operation of the headrest 1, seat back 2, and Ottoman 4 to be adjusted is prohibited or suppressed for some reason, it is detected that the adjustment speed becomes slow;
It issues an alarm, and after moving a certain amount in the opposite direction to the adjustment direction, the operation is stopped.

Therefore, it is possible to prevent burnout of each motor 15, 19, 23,
Furthermore, the safety of the person sitting on the seat and those near the seat can be ensured.

Note that the present invention is not limited to the above embodiments.

For example, in the above embodiment, the alarm device 32 emits an alarm sound, but other sounds may be used, such as an artificial sound or a light-emitting display. or,
The three emergency stop switches may also be displayed by emitting light. By doing so, you can operate it reliably even when using it in a dark place. Furthermore, in this embodiment, the headrest 1, seat back 2, and Ottoman 4 are each adjusted by motor drive.
The present invention is applicable to any seat in which at least one of these three is adjusted by motor drive.

<Effects of the Invention> As explained above, according to the present invention, it is possible to realize a seat that can prevent burnout of the motor and ensure the safety of the seat occupant and those in the vicinity of the seat.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the flow of one embodiment of the present invention, FIG. 2 is a diagram showing another flow of one embodiment of the present invention, and FIG.
FIG. 4 is a diagram showing the external appearance of the sheet in FIG. 1, and FIG. 5 is a diagram illustrating a conventional example. 1... Headrest 2... Seat back 3.
...Seat cushion 4...Ottoman 11...
CPLJ 12...ROM14...RA
M15...Headrest movement motor 16.20.24...Driver 17.21.25...Potentiometer 18.22.
26-A/Da' converter 19...Seatback tilting motor 23...Ottoman movement motor 27-29...Memory switch 30...Manual switch 31...Emergency stop switch 32... Alarm device 33...Interface circuit Fig. 1 Fig. 2

Claims (1)

[Claims] At least one of adjusting the front and back position of the headrest, adjusting the inclination angle of the seat back, and adjusting the front and back position of the ottoman,
A seat that is driven by a motor and is characterized in that when the adjustment speed is slower than a set value, the seat is moved a certain amount in the opposite direction to the adjustment direction.