JP2003111638A - Automatic inclining chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic inclining chair in which movement is soft, automation for controlling angle of inclination is easily performed and a driving mechanism which makes seats of an airplane, a train or a theater automatically and simultaneously ascend/descend and incline, can be installed at one place for preventing economy class syndrome. SOLUTION: The automatic inclining chair 1 in which a seat face plate 32 repeatedly moved by being inclined in a range of set angles is arranged on a base plate 31 and the seat face plate 32 is pivoted on the base plate 31 so as to be freely inclined by means of an inclination shaft 36 in the horizontal direction and an air bag 33 connected with an air pumping system is arranged between the base plate 31 and the seat face plate 32 and a control part 70 for inclining the seat face plate 32 within the set angle from the base plate 31 by expansion and contraction of the air bag and periodically and repeatedly moving it, is arranged in the air pumping system is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic seat tilting chair having a seating surface for tilting and repetitive motions, and more particularly, to a seat occupant's posture by a vertical tilting mechanism for a long period of time by repeatedly tilting the seated person back and forth. The present invention relates to an automatic seat tilting chair that prevents a seating obstacle.

[0002]

2. Description of the Related Art Conventionally, office chairs and work chairs for sitting on a chair for a long time to perform office work, assembling parts, monitoring machines, etc. The seated person causes back pain and the like. In order to solve such problems as low back pain, various recommendations have been made for the design of these chairs.
However, even in a chair designed in accordance with this recommendation, it has been reported that pain in the lower back and buttocks and swelling of the lower limbs occur when the chair is still sitting in the same sitting posture all day. The following points have been pointed out as the mechanism of the burden of the fixed sitting posture.

1) Sustained muscle contraction occurs in the posture-retaining muscle groups such as the erector spinae muscles, iliopsoas muscles, and lower limb muscle groups due to the continuation of the same sitting posture, which causes muscle fatigue and circulatory disturbance in that region. , This can cause pain in the lower back and buttocks, and swelling of the lower limbs.

2) Since there are no blood vessels in the intervertebral disc (cartilage),
Nutrient metabolism is performed by the diffusion of nutrients from the surrounding blood vessels. This diffusion is promoted by changes in intervertebral disc pressure due to changes in posture. However, if the same sitting posture continues, this diffusion is obstructed and nutritional disorders of the intervertebral disc occur, resulting in intervertebral disc disorder and back pain.

3) When the same sitting posture is continued, pressure is applied to the ischial tuberosity and the posterior surface of the thigh, which are in contact with the seat surface, causing circulatory disturbance, which causes pain in the buttocks and thighs and swelling of the lower limbs. Cause.

Under these circumstances, as a conventional chair that tilts manually (hereinafter referred to as "manual tilt chair"), for example, a rocking chair type in which the entire chair tilts and a seat in which only the seat surface tilts are used. There are face tilt type chairs. Some chairs have only a backrest that tilts, but this is outside the scope of the technical field in which the seat surface tilts. Among them, the rocking chair type chair is mainly for resting, it is not possible to control the fine movement, and when tilting by the movement of the upper body, the tilting speed is high and the tilting frequency is high, so that the seated person's line of sight does not shake. It is not suitable for work because it causes fast eyestrain, troubles in work, and is moved manually.

Further, the seat tilting type chair tilts manually due to the movement of the hips on the tilt axis and the bending of the trunk, but fine control is still difficult. In addition, since the support of the seat surface is unstable, muscle tension increases and work is hindered. Further, due to human power, there is a problem that tilting is reduced in highly restrictive work.

As an alternative to the conventional human power tilting chair having these problems, the inventors have developed the automatic seat tilting chairs of Japanese Patent No. 3131645 and Japanese Patent No. 3106360. These are provided on the lower surface of the seat part, which is rotatably supported between the leg part and the back part so that the seat surface can be tilted up and down to tilt the seated person back and forth. Up and down movement means for driving and tilting continuously and continuously changing the tilt angle, and up and down tilt repeating mechanism for automatically altering the tilt direction of the seat within a predetermined angle range. It is equipped with. In the former case, the seat surface vertical tilting movement means for tilting the seated person back and forth tilts the seat surface by means of a motor via a worm gear element and a speed reducer. In the latter, the seat surface is tilted by a motor via a clan arm and a speed reducer, or by a motor with a speed reducer via a screw and a spur gear. These automatic seat-tilt chairs continue to work while sitting on a chair, because the seat is automatically tilted up and down by the machine even if the seated person does not move the body. It is possible to prevent back pain caused by sitting for a long time. In particular, in the above-mentioned one, since the backrest and the seating portion are separated and independent, tilting the seating portion vertically causes the angle between the backrest and the seating portion to change according to the tilting. Due to this change, the human body tilts back and forth to exert a pressure-extending action on the spine (cartilage) of the lumbar region, which causes a pump action on the cartilage of the intervertebral disc to promote nutritional supplementation and further prevent back pain.

However, a worm gear element or a screw spur gear has noise due to meshing of gears. In addition to the motor and the speed reducer, means for setting the tilt angle is required. On the other hand, the crank type has the advantage that it does not cost much because it only requires a motor and a speed reducer, and it is more difficult to break, but it is not possible to freely adjust the angle and it is not easy to change the tilt angle range Therefore, there is a problem such as lack of flexibility.

Furthermore, recently, there has been a problem of economy class syndrome, which complains of dyspnea, chest pain, etc. immediately after landing after a long flight by an airliner and sometimes breathes as it is. This is because more than 90% of them stay in the narrow seats of an airplane for a long time without being able to move, which causes congestion in the lower body and blood clots in the veins of the lower limbs, which may be separated from the blood vessel wall for some reason. This is due to the fact that they get into the flow and block the pulmonary artery, causing pulmonary embolism.

As a countermeasure against this, there is a case where the lower leg is massaged from the thigh while sitting to promote blood circulation, but there is a problem that it cannot be easily executed in a narrow seat.

[0012]

The problem to be solved by the present invention is to solve the above-mentioned various problems, to further reduce the cost, to have a soft movement, and to easily automate the tilt angle adjustment. In addition, individual chairs can be equipped with individual means, and at the same time, a large number of chairs such as chairs for seats of aircraft and bullet trains, or seats of theaters and conference halls can be arranged and arranged. In the chair we set up,
By providing a simultaneous drive mechanism system that allows the seats of many chairs to automatically tilt up and down at the same time without providing a separate drive mechanism for each chair, so-called economy due to long-term sitting A system that is effective in preventing class syndromes and that can be made lighter by using a simultaneous drive mechanism rather than providing a drive mechanism for each chair can be a system that is extremely advantageous especially for aircraft. It is to provide a device.

[0013]

In the invention of claim 1, the seat plate is tilted up and down within a set angle range to prevent a seated person from sitting down for a long time. In an automatic seat tilting chair, the seating surface plate is arranged on the base plate, and the seating surface plate is pivotally supported on the base plate by a tilting axis whose horizontal direction is the axial direction so that the seat base plate can be tilted up and down. A control mechanism that arranges an air bag connected to the air supply / exhaust system and tilts the seat plate vertically from the substrate within a set angle range by cyclic expansion / contraction of the air bag by air supply / exhaust to cyclically repeat the motion It is an automatic seat tilting chair characterized in that it is arranged in. In the above description, tilting up and down within the set angle range and repeating motion means that the seat plate tilts up and down within the tilt angle range that is arbitrarily set.

According to a second aspect of the present invention, the air supply / exhaust system connected to the air bag has a compressed air supply source, an air supply amount adjusting valve, and an air supply / exhaust switching valve. The automatic seat tilting chair according to claim 1, characterized in that it comprises an exhaust system from an airbag in which a valve and an exhaust amount adjusting valve are arranged.

According to a third aspect of the present invention, the tilting shaft disposed between the seat plate and the base plate is located near the trunk position of the seated person. It is a face tilt chair.

According to another aspect of the present invention, the control mechanism for tilting the seat surface plate up and down within a set angle range to cyclically repeat the motion is a cycle adjusting timer and an air supply / exhaust switching provided on the seat surface automatic tilting chair. 4. An electromagnetic valve, a compressed air supply source, and each element including an angle changeover switch equipped with an angle sensing switch, and a control unit for performing related control between these respective elements. It is an automatic seat-tilting chair of the means of paragraph.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. 1 to 9 are schematic explanatory views of an automatic seat tilting chair using an airbag according to an embodiment of the present invention as a tilting unit. FIG. 1 is a front view of one embodiment of an automatic seat tilting chair using an airbag as a tilting means. FIG. 2 is a right side view of the automatic seat tilting chair of FIG. 1 and shows a switch board of a control box under the seat. FIG. 3 is a left side view of the automatic seat tilting chair shown in FIG. FIG. 4 is a perspective view of the automatic seat tilting chair showing the fixed base plate excluding the seat plate and the airbag. FIG. 5 is a perspective view showing an airbag placed on a fixed substrate. FIG. 6 is a schematic view of the airbag, (a) is a top view of the airbag, and (b) is a bottom view of the airbag. FIG. 7 is a diagram for explaining the connection between the air bag and the air supply / exhaust pipe, (a) shows an air port provided in the fabric on the lower surface side of the air bag, (b) shows a nipple for connecting to the air port, (C) is a diagram showing a state in which an air bag and an air supply / exhaust pipe are connected by an air port and a nipple. FIG. 8 is an air flow path diagram showing the flow of air.
FIG. 9 is an electrical component configuration diagram showing the relationship between the control unit and the electrical components.

An embodiment of the present invention will be described with reference to an automatic seat tilting chair 1 shown in FIGS. The automatic seat tilting chair 1 according to this embodiment includes a leg portion 20, a seat portion 30, and a backrest portion 5.
0, in particular the seat 30 and the backrest 50 are independent of each other. By making the backrest 50 independent of the seat 30 as described above, when the vertical tilt angle of the seat 30 is periodically changed, the seat 30 is seated and the backrest 50 is seated. The body of the seated person is continuously bent and stretched in the vicinity of the waist of the seated person as a result of the seated person's lumbosacral angle being continuously and repeatedly changed as the seat 30 is repeatedly tilted while the backrest is restrained from tilting backwards. The movement is repeated to promote the mobility of the waist and back. Leg 20
Is the same as a normal office chair, and is provided at the lower end of the pedestal 21 and a pedestal 21 that extends from the lower portion of the seat portion 30 toward the floor surface and can be adjusted to an arbitrary height with an internal gas spring (not shown). It is composed of 4 to 5 leg blades 22 that are horizontally rotatable and spread radially to support the seat portion 30 in a stable manner, and casters 23 provided at the tip of each leg blade 22, and can move to any position. For convenience of description, the automatic seat tilting chair 1 is a chair that can be moved by casters independently. However, the chair to which the present invention is applied is a chair used for transportation such as an aircraft, a train, or a bus. Alternatively, it goes without saying that the chair may be a chair that is locked to the floor without moving with casters like a chair in a theater.

The seat portion 30 of the above automatic seat tilting chair 1 is
A base plate 31 having a large seat portion which is horizontally fixed and attached to the upper end of the pedestal 21, a seat face plate 32 which is attached to the base plate 31 by a tilt shaft 36 whose horizontal direction is an axial direction, a base plate 31 and a seat face plate 32. The seat 33 includes an airbag 33 inserted between the seats, and a cushion member is provided on an upper part of the seat plate 32, and an upper surface of the cushion member serves as a seat surface 34 for seating. In this embodiment, the tilt shaft 3 of the rotary shaft that tilts the seat portion 30 up and down.
Reference numeral 6 is a rotating shaft of a hinge 35 attached to the rear ends of the base plate 31 and the seat plate 32. As seen in FIG. 4, the substrate 3
A hole 40 into which the air port 37 on the lower surface of the airbag 33 is inserted is opened at the center of the front portion of the air bag 1. By the way, in another embodiment, the tilting shaft 36 of the rotating shaft that tilts the seat portion 30 up and down is between the seat plate 32 and the base plate 31 and near the trunk position of the seated person. By doing so, only the lumbosacral angle of the seated person is continuously changed, but the trunk of the seated person hardly moves up and down, and therefore the position of the eyes hardly moves, so that the seat portion 30 tilts. However, dizziness is prevented. Further, in this case, the airbags 33 may be arranged in front of and behind the tilting shaft 36, and air may be supplied and exhausted alternately to move the seat portion 30 up and down.

On a base 43 above the pedestal 21 to which a base plate 31 below the seat 30 is attached, a back support rod 51 for supporting a backrest 50 made of a cushion member is provided below a vertical portion behind the seat. It is bent and extends forward to be attached. The front end portion of the back support rod 51 extending forward is pivotally supported by the base 43 by means (not shown) and is attached independently of vertical movement of the seat portion, that is, forward and backward tilting of the seated person. If necessary, the backrest portion 50 can be rocked back and forth by the back force of the seated person regardless of the vertical movement of the seat portion by an appropriate means.

Below the base plate 31, which is the lower part of the seat portion 30, a control portion 70 and a compressed air supply portion 80 of a mechanism for vertically tilting the seat surface 34 are arranged on the right and left sides, respectively. Further, an angle sensing portion 60 is provided on the front side of the side portion of the substrate 31, and this angle sensing portion 60 is provided with an angle sensing rod 61 having a sensing piece 62 formed at the tip downward from the side portion of the seat plate 32. . A detection piece 62 is attached to the lower end side of the angle detection rod 61, and on the other hand, an upper angle detection switch 64 and a lower angle detection switch 65, which are limit switches, are attached to the attachment member 63 below the substrate 31 so as to be arranged vertically. . The upper angle sensing switch 64 and the lower angle sensing switch 65 are switched by the angle switching switch 74 of the control unit 70 to switch the vertical tilting of the seat portion 30 at a set angle.

To set the attachment positions of the upper angle detection switch 64 and the lower angle detection switch 65, which are the limit switches, to the attachment member 63, the seat portion 30 is used as the pivot axis of the tilt shaft 36 of the hinge 35 as the fulcrum. The height of the mounting position of the angle detection rod 61 at the tip of the seat plate 32 that moves up and down is determined, and a limit switch is provided at this height position. That is, the height when the seat surface plate 32 is tilted by 1 degree is obtained with the size of the seat surface plate 32 as the radius around the tilt axis 36 of the operation fulcrum, and from this height, for example, the tilt angles are 2 degrees and 4 degrees. Calculate the height of the seat plate 32 in degrees,
The mounting position is the position where the limit switch operates when the seat plate 32 is tilted up and down by the respective heights. For example, the upper angle detection switch detects a tilt angle of 4 degrees and the lower angle detection switch detects a tilt angle of 2 degrees. It shall be.

The airbag 33 inserted between the upper surface of the base plate 31 and the seat plate 32 is made of nylon cloth coated with urethane, and the upper and lower two cloths of the upper surface 33a and the lower surface 33b shown in FIG. It consists of a bag formed by welding. FIG. 6A shows the upper surface 33 a of the airbag 33.
6B shows the lower surface 33b of the airbag 33. As shown in FIG. The upper surface 33 of the airbag 33 as shown in FIGS.
A seat plate 32 is placed on a, and as shown in FIG. 5, the lower surface 33b of the airbag 33 faces the substrate 31 and is placed on the upper part thereof. A semi-circular cutout 38 is formed around the airbag 33. The notch 38 is formed on the substrate 31.
Tightening part 3 that attaches the base to the base 43 at the top of the pedestal 21
The airbag 33 is provided so as not to come into contact with the protruding portion of the airbag 33 and cause scratches.
Therefore, by eliminating the protruding portion of the screw tightening portion 39, the airbag 33 having no notch portion 38 can be obtained.

On the lower surface of the airbag 33, an air port 37 made of soft plastic for supplying / exhausting air to / from the airbag is provided. FIG. 7A shows a cross-sectional shape of the air port 37 provided on the lower surface 33b of the airbag 33. At the air port 37, an L-shaped nipple 41 made of hard plastic having a cross-sectional shape shown in FIG.
2 is attached, as shown in (c) of FIG.
The lower surface 33b of the airbag 33 is inserted and fitted into the air port 37.

As shown in FIG. 2, a control unit 70 is provided on the lower surface on the right side of the substrate 31, and a power switch 71 is provided on the side surface thereof.
A rise time adjustment knob 72 for adjusting the rise time of the seat plate 32 by rotation, a fall time adjustment knob 73 for adjusting the fall time by rotation, and a maximum tilt angle of the seat plate 32 up and down are switched to, for example, 2 degrees and 4 degrees. Angle switch 7 for
4 and a cycle time adjusting timer 75 for adjusting the time of one cycle of the vertical tilting of the seat plate 32. The cycle time adjusting timer 75 comprises a twin timer, and an air pump of the compressed air supply source 81 and a supply / exhaust switching solenoid valve 83.
Adjust the operating time of the electromagnetic three-way valve. With this twin timer, the rise time and fall time of the seat plate 32 can be adjusted. The ON time of the twin timer is the time when the electromagnetic three-way valve is on the air supply side, and the OFF time of the twin timer is the time when the electromagnetic three-way valve is on the exhaust side. The operations of the electromagnetic three-way valve and the air pump are controlled by a latching relay (not shown).

As shown in FIG. 3, a compressed air supply unit 80 is provided on the lower surface on the left side of the substrate 31. Inside thereof is a compressed air supply source 81 composed of an air pump shown in the air flow path diagram of FIG. The air supply amount adjusting valve 82, the air supply / exhaust switching electromagnetic valve 83, and the exhaust amount adjusting valve 84 are attached to the control unit 70, and they are connected by a pipe body (not shown) to form an air flow path. Among these, the compressed air supply source 81, the supply air amount adjusting valve 82, the supply / exhaust switching electromagnetic valve 83, and the airbag 33.
The supply / exhaust pipe 42 to the air bag 33 constitutes an air supply system, and the supply / exhaust pipe 42 to the airbag 33 and the exhaust passage adjusting valve 84 constitute an exhaust system. Compressed air supply source 8
The performance of the air pump, which is 1, is 0.01 MPa.
At this time, the air amount of 10 l / min is supplied,
In this embodiment, two pumps are used. However, it goes without saying that the performance can be increased to a single unit. Air supply amount adjusting valve 8 which is an air flow rate adjusting valve
2 and the exhaust amount adjusting valve 84 are for adjusting the amount of air supplied to the airbag 33 and the amount of exhaust air, and the amount of supplied air to the airbag 33 and the amount of exhaust air are adjusted by adjusting these adjusting valves. As a result, the rising time and the falling time of the seat plate 32 can be adjusted. Further, the air supply / exhaust switching electromagnetic valve 83 is composed of an electromagnetic three-way valve, and switches between air supply and exhaust of air to the airbag 33.

In the above embodiment, the compressed air supply source 8 is used.
1 relies on the air pump provided in each chair, but in an aircraft, train, theater, etc. where each chair is fixed to the floor, as another embodiment, an air pump is provided for each chair. Besides, 1 in a place different from the place where the chair is installed
It is also possible to arrange a large air pump of a table and connect the air piping to a plurality of chairs to use the compressed air supply source 81 of each chair. By doing so, the cost of the equipment can be reduced, and the overall weight can be reduced, which is extremely advantageous for aircraft and trains. Of course, in this case, it is possible to move a plurality of chairs all at once, or by providing an air flow rate adjusting valve on each chair and arranging a switch, the tilt can be adjusted according to the preference of the seated person. Absent.

Next, an automatic tilting operation method of the seat surface 34 which is operated by expansion and contraction by supplying / exhausting air to / from the airbag 33 of the automatic seat surface tilting chair 1 having the above-described structure will be described.

The seated person is seated on the seat surface 34, but if the seated person feels tired after sitting for a long time, the control unit 7
The power switch 71 of 0 is turned on to turn on the power of the entire chair. By turning on this power switch 71,
As shown in the air flow path diagram of FIG. 8, the air pump, which is the compressed air supply source 81, operates to pass from the air supply / exhaust pipe 42 to L through the air supply system including the air supply amount adjusting valve 82 and the air supply / exhaust switching electromagnetic valve 83. Air is supplied to the airbag 33 from the air port 37 engaged by the mold nipple 41. Due to this air supply, the airbag 33 expands and pushes up the seat surface plate 32, and when the front of the seat surface plate 32 tilts upward and the seat surface 34 tilts at a set angle, the air supply / exhaust switching solenoid valve 83 switches and the airbag 33 is seated. The air is exhausted from the air bag 33 through the air supply / exhaust pipe 42 through the air supply / exhaust switching solenoid valve 83, and further through the exhaust system of the exhaust amount adjusting valve 84 by the body weight of the person, and the air bag 33 contracts and the seat surface 34 The tilt is gradually eliminated,
The front of the seat plate 32 returns to the original height. In this way, the periodic repetitive motion of the vertical tilt of the seat surface 34 within the set angle range is repeated.

In the above operation, the tilt angle adjustment of the seat plate 32 is performed as follows. As shown in FIGS. 2 and 9, by switching the angle changeover switch 74 of the control unit 70 up or down, the limit switch to be operated is selected to select either the upper angle detection switch 64 or the lower angle detection switch 65. The operation mode is switched and the operation mode is selected, for example, twice or four times, for example, two times.
Then, when the set angle of this operation mode reaches 2 degrees, the air pump stops, and the forward elevation of the seat plate 32 stops.
At this time, the angle detection rod 6 is set to 2 degrees earlier than the ON time of the cycle time adjusting timer 75 which is a twin timer, that is, the air supply time of the supply / exhaust switching solenoid valve 83 of the three-way valve.
When the detection piece 62 of 1 has arrived, this angle is held.
On the contrary, the cycle time adjustment timer 7 which is a twin timer
If the set angle of 2 degrees is not reached within the ON time of 5, the cycle time adjustment timer 75 becomes the OFF time,
The three-way valve supply / exhaust switching solenoid valve 83 operates to start exhaust. As for the ascending / descending speed, the ascending speed is adjusted by rotating the ascending time adjusting knob 72 to adjust the valve opening of the air supply amount adjusting valve 82, and the descending time adjusting knob 73 is rotated as a result.
It is possible to adjust and determine the descending speed by adjusting the valve opening degree of No. 4.

Thus, time and speed (that is, air volume)
Therefore, even seated persons having different weights can move the seat surface 34 up and down by a predetermined angle at a predetermined time. For example, for a seated person with a light weight, the rise time adjustment knob 72 is turned to the right slowly to reduce the opening degree of the air supply adjustment valve 82 to slow the speed of the rise, and for a seated person with a heavy weight, the rise time is adjusted. Turn the knob 72 to the left earlier to adjust the air supply amount 8
By opening the valve opening of No. 2 and increasing the rising speed, the set angle can be reached in a certain time regardless of the weight of the seated person.

If the amount of air supplied and exhausted cannot be controlled, the rising time depends on the performance of the air pump, and the falling time depends on the weight of the occupant. Will end up. When it is desired to set one cycle time at an arbitrary angle, the angle and one cycle time can be determined by adjusting the on / off time of the cycle time adjusting timer 75, which is a twin timer, and the amount of air supplied and exhausted.

The angle can be switched by, for example, switching the angle changeover switch 74 up when it is set to 2 degrees and down when it is set to 4 degrees. The angle sensing switch 64 is selected and the limit switch limits further rise.

Further, the tip of the angle detecting rod 61 is formed as a male screw, two detecting pieces 62 are formed, and female screws are provided on each of them, and the tip of the angle detecting rod 61 is screwed into the male screw. The angle can be arbitrarily changed.

[0035]

As described above, in the automatic seat tilting chair of the present invention, the weight of the device can be reduced by utilizing the inflation / deflation of the airbag as the drive mechanism for tilting the seat. In addition, multiple chairs can be operated with one drive source without providing a drive source for each chair, and the overall weight can be reduced. It is suitable as an automatic seat tilting chair for seats, and because the air cushion effect of the airbag can be utilized, it is easy to obtain a gentle tilting speed that acts gently on the seated person, and it is possible to use a fluid control device. The effect of force can be easily changed, tilt angle adjustment can be easily automated, and it can be easily applied not only to individual seats but also to chaise lounges. It is.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of an automatic seat tilting chair using an airbag as a tilting means.

FIG. 2 is a right side view of the automatic seat tilting chair of FIG. 1, showing a switch board of a control box under the seat.

3 is a left side view of the automatic seat tilting chair of FIG. 1. FIG.

FIG. 4 is a perspective view of an automatic seat tilting chair showing a fixed base plate excluding a seat plate and an airbag.

FIG. 5 is a perspective view showing an airbag placed on a substrate.

FIG. 6 is a schematic view of an airbag, (a) is a front view,
(B) is a rear view.

FIG. 7 is a diagram for explaining the connection between the air bag and the air supply / exhaust pipe, (a) shows an air port provided in the fabric on the back side of the air bag, and (b) is a nipple of the air supply / exhaust pipe connected to the air port. And (c) is a diagram showing a connection state between the airbag and the air supply / exhaust pipe.

FIG. 8 is an air flow path diagram showing the flow of air.

FIG. 9 is an electrical component configuration diagram showing a relationship between a control unit and electrical components.

[Explanation of symbols]

1 Automatic seat tilt chair 30 seats 31 substrate 32 seat plate 33 airbags 34 Seat 36 Tilt axis 50 Backrest 60 Angle sensor 61 Angle detection rod 62 detection pieces 64 Upper angle detection switch 65 Lower angle detection switch 70 Control unit 74 Angle switch 75 cycle adjustment timer 80 Compressed air supply unit 83 Air supply / exhaust switching solenoid valve

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Haruki Nakao             2-9-4 Nakaikenoue, Ota-ku, Tokyo Nitto             Koki Co., Ltd. (72) Inventor Shigemitsu Ishibashi             2-9-4 Nakaikenoue, Ota-ku, Tokyo Nitto             Koki Co., Ltd. F-term (reference) 3B084 BA01                 3B099 AA01 BA02 CA35 CB02 CB05

Claims (4)

[Claims] 1. An automatic seat tilting chair in which a seat plate is tilted up and down within a set angle range to prevent a seated person from being obstructed by sitting for a long time. The seating surface plate is tilted up and down by the tilting shaft, and an air bag connected to the air supply / exhaust system is installed between the board and the seating surface plate to expand and contract the air bag by supplying and exhausting air. The automatic seat tilting chair is characterized in that a control mechanism for tilting the seat surface plate up and down within a set angle range to cyclically repetitively move is provided in the air supply and exhaust system. 2. An air supply / exhaust system connected to an air bag is provided with a compressed air supply source, an air supply amount adjusting valve, and an air supply / exhaust switching valve, an air supply system to the air bag, an air supplying / exhausting switching valve, and an exhaust amount adjusting. 2. The automatic seat tilting chair according to claim 1, comprising an exhaust system from an airbag provided with a valve. 3. The automatic seat tilting chair according to claim 1, wherein the tilting shaft disposed between the seat plate and the base plate is located near the core position of the seated person. 4. A control mechanism for tilting the seat surface plate up and down within a set angle range to cyclically repeat the motion is a cycle adjusting timer, a supply / exhaust switching solenoid valve, and compressed air provided in a seat tilting chair. The automatic device according to any one of claims 1 to 3, further comprising: an element including an angle changeover switch having a supply source and an angle sensing switch; and a control unit that controls the relationship between these elements. Seat tilt chair.