JP2003102801A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair suitable for use in an office or the like and accelerating the flow of blood or body fluids to the region under a knee. SOLUTION: The chair 1 is equipped with a seat 2 attached to legs 7 rotatable left and right and the moving means 30 attached to the legs 7 and vibrators 31 are incorporated in the seat 2 at positions 33 for supporting the femoral region of one who is seated on the seat 2.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a chair. More specifically, the present invention relates to a chair having a massage function.

[0002]

2. Description of the Related Art Conventionally, there is a massage chair in which a massage device is incorporated in a backrest or the like. This type of massage chair has a large, heavy and rigid chair body that wraps around the seated person's body, and has a posture in which the seated person leans against the backrest or in a position in which the seated person is put to sleep. It is a massage. A massage device, such as a vibrator or a rotating roller, is built into the back and calf-contacting parts to massage the seated person's neck, shoulders, back, waist and calf. A commercial power source is used as the power source for the massage device.

Further, as a chair capable of performing acupressure while sitting down, Japanese Patent Laid-Open Nos. 7-284426 and 20
There is a chair described in Japanese Patent Publication No. 00-308663. In the former chair, the legs of the chair are provided with protrusions, and the seated person places his / her feet on the protrusions to stimulate the acupuncture points on the soles of the feet. Further, in the latter chair, a protrusion is provided on the backrest, and the seated person presses the back against the protrusion to stimulate the back pot.

[0004]

By the way, it is known that if the desk work is continued for a long time, fatigue is accumulated in the body, concentration is lowered, and work efficiency is deteriorated. In such a case, if a massage chair can be used, a massage can be easily received between desk work, fatigue recovery can be achieved, and the mood can be refreshed to improve work efficiency.

However, the massage chair described above is large as a chair, requires a large space for its installation, and is heavy and difficult to move. Therefore, it is not suitable for a chair used in a room or the like in which a limited fixed space must be efficiently used, such as an office chair used for desk work.

On the other hand, the above-mentioned chair, which is provided with protrusions on the legs and the backrest so as to be capable of acupressure, can be used as an office chair. However, in this case,
The occupant must press his foot or back strongly against the protrusion. Also, since the foot or back is pressed against the protrusion, it is possible to apply acupressure but not massage.

In recent years, it has been pointed out that adverse effects on the body due to sitting in a chair in the same posture for a long time are continued. For example, by continuing to sit in the same posture, the flow of blood and body fluid below the knee may be deteriorated, causing so-called economy syndrome. Therefore, there is a demand for the development of a chair that promotes the flow of blood and body fluid below the knee.

It is an object of the present invention to provide a chair which is suitable for use in an office or the like, has a massage function, and can promote the flow of blood or body fluid below the knee.

[0009]

In order to achieve the above object, the invention according to claim 1 is provided with a seat attached to the leg so as to be rotatable in the left-right direction, and a moving means attached to the leg. In a chair, a vibrating body is incorporated at a position that supports the thigh of a seated person.

Therefore, the vibration of the vibrating body is transmitted to the thigh of the seated person, and this portion is massaged. Generally, the thigh is pressed by the seat, but the massage of the thigh promotes blood circulation in this part, and the flow of blood and body fluid to the below knee is improved. The chair can be easily moved by moving means such as casters. Also, the seat can be rotated in the left-right direction with respect to the legs, and the direction can be changed while sitting. Therefore, the chair is suitable for desk work in the office.

A chair according to a second aspect of the present invention includes a backrest, and a vibrating body is incorporated at a position for supporting a seated person of the backrest. Therefore, the vibration of the vibrating body is transmitted to the back and waist of the seated person, and these parts can be massaged.

According to a third aspect of the chair, an electric seat tilting means capable of tilting a load supporting surface for supporting a load on a seat of a seated person and fixing the seat at a desired tilt angle, and a load supporting surface of the seated person. A seat load sensor for detecting the balance of the load on the surface, and a correction control means for actuating the seat tilting means so as to increase the higher load on the load supporting surface in response to the detection result from the seat load sensor. A periodic control means for periodically operating the seat tilting means is provided.

Therefore, if the seated person has a bad posture and the load on the seat is unbalanced, the correction control means is activated to increase the load on the load bearing surface. Activate the tilting means. Therefore, since the bent spine of the seated person can be straightened, adverse effects on the body such as low back pain and economy syndrome can be suppressed. Further, since the load support surface is tilted periodically by the regular control means, it is possible to suppress adverse effects on the body due to congestion and the like even when sitting in a correct posture for a long time.

The invention according to claim 4 is the same as claim 3
In the chair described above, the seat tilting means tilts the load support surface in the left-right direction, and the seat load sensor detects the left-right balance of the load. Therefore,
When the seated person's spinal column is curved in the left-right direction and the body pressure balance is deteriorated, the lateral bending of the spinal column can be corrected.

Further, the invention according to claim 5 is the same as claim 3
Alternatively, in the chair described in 4, the seat load sensor is a surface sensor provided inside the seat. Therefore, the imbalance of the load of the seated person can be accurately detected.

According to a sixth aspect of the invention, in the chair according to the third or fourth aspect, the seat load sensor is a point sensor provided inside the seat. In this case, since the point sensor is cheaper than the surface sensor, the cost increase of the chair can be suppressed.

The invention according to claim 7 is the same as claim 3
The chair described in any one of 1 to 6 is provided with an operation switch for arbitrarily turning on and off the operation of the seat tilting means. Therefore, the seat position can be set according to the preference of the seated person, and the sitting comfort can be enhanced.

Further, the invention according to claim 8 is the chair according to any one of claims 3 to 7, further comprising a seat elevating means for elevating the seat and the seat tilting means. Therefore, for example, since the seat can be lowered when the front end of the seat is tilted so as to rise, it is possible to prevent the front end of the seat from pressing the back side of the thigh. Also, since the seat can be raised when the front end of the seat is tilted so as to descend, the front end of the seat and the floor are kept at a constant distance and the thighs are seated even when the knee is bent. It can be prevented from floating from the surface.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The structure of the present invention will be described below in detail based on the best mode shown in the drawings.

1 to 3 show a first embodiment of a chair to which the present invention is applied. The chair 1 includes a seat 2 attached to the leg 7 so as to be rotatable in the left-right direction, and a moving means 30 attached to the leg 7, and a position 33 for supporting the thigh of the seated person on the seat 2. The vibrating body 31 is incorporated in.

In this embodiment, the chair 1 is an office chair. Here, in the present specification, the office chair is not limited to the one used for general office work, and is a concept including, for example, a learning chair and a chair with casters.

The vibrating body 31 generates a vibration transmitted to a seated person, and is composed of, for example, a vibration motor (not shown) and a case for accommodating the vibration motor. The vibrating body 31 is housed in a space formed by hollowing out the cushion material of the seat 2 from below. The case of the vibrating body 31 is attached to a seat plate (not shown). The vibrating body 31 is
It is provided at two locations corresponding to the left and right thighs of the seated person. The vibration motor of the vibrating body 31 is connected to a battery (not shown), and vibrates or stops when a switch (not shown) is turned on / off. The battery and the switch are attached, for example, at positions that do not interfere with the legs 7 and the back of the seat 2. It is preferable to use a small and rechargeable battery. This can prevent the chair 1 from becoming large. Further, by using the battery as the power source, a power cord for supplying electric power from the outside is unnecessary, so that the power cord does not hinder the movement of the chair 1 and the chair 1 can move freely.

The moving means 30 is, for example, a caster.
The moving means 30 is attached to the five tips of the legs 7.

The chair 1 is an office chair, and is used, for example, for office desk work. Even if the vibrating body 31 is incorporated, the size of the chair 1 itself hardly changes, so that the chair 1 can be used in a place where a limited fixed space must be efficiently used. Also,
Since the seat 2 of the chair 1 is rotatable and can be easily moved by providing the moving means 30, it is suitable for use in an office or the like. Further, since the battery is used as the power source of the vibrating body 31, it is not necessary to extend the power cord and connect it to a power outlet installed on a wall or the like, which is suitable for use in an office or the like.

When the vibration of the vibrating body 31 is stopped, the chair can be used in the same manner as a chair without the vibrating body 31. When the switch is turned on, the vibrating body 31 vibrates. This vibration massages the thigh of the seated person, promotes blood circulation, recovers from fatigue, and refreshes the mood. The seated person can receive the massage in a relaxed state because he / she can receive the massage just by sitting and does not need to actively perform the action such as stimulating the vase by himself / herself. Further, in the sitting posture, the thigh of the seated person is pressed by the seat 2, so that the flow of blood or body fluid to the below the knee tends to be delayed,
By vibrating the vibrating body 31 and massaging the thighs, it is possible to promote the flow of blood or body fluid below the knee.

After massage for a while,
Turn off the switch to stop the vibration of the vibrating body 31,
Resume desk work. Since the massage can be performed using the chair 1 used for desk work in this manner, fatigue recovery and a change of mood can be easily achieved.
In addition, since it is possible to promote the flow of blood or body fluid below the knee, it is possible to prevent the occurrence of a thrombus due to the stagnant flow of blood or the like.

Note that desk work or the like may be performed while vibrating the vibrating body 31. In this case, it is preferable that, for example, the strength of vibration of the vibrating body 31 is set so that the seated person's viewpoint does not shift so as not to hinder desk work and the like.

Next, a second embodiment of the chair to which the present invention is applied will be described with reference to FIGS. The chair 1 includes, in addition to the vibrating body 31, an electric seat tilting means 3 that tilts a load support surface 2a that supports a load of a seated person on a seat 2 and that can be fixed at an arbitrary tilt angle, and a seated person. Seat load sensor 4 for detecting the balance of the load on the load support surface 2a
And a straightening control means 5 and a regular control means 6 for operating the seat tilting means 3. And the correction control means 5
Receives the detection result from the seat load sensor 4 and operates the seat tilting means 3 so as to increase the load on the load support surface 2a which is heavily applied. Further, the regular control means 6 activates the seat tilting means 3 on a regular basis. Therefore, if the seated person has a bad posture and the load on the seat 2 is unbalanced, the correction control means 5 operates to increase the load on the load support surface 2a. Seat tilting means 3
Operate. Therefore, the bent spine of the seated person can be straightened. Further, since the load control surface 2a is periodically tilted by the regular control means 6, it is possible to suppress the adverse effect on the body due to congestion or the like even when sitting for a long time in a correct posture. The seat load sensor 4
Is provided behind the vibrating body 31.

In this embodiment, the chair 1 is an office chair. The load support surface 2a is a seat surface. Then, the seat tilting means 3 tilts the load support surface 2a by tilting the entire seat 2.

The seat 2 is rotatably supported by a seat receiving member 8 which is attached to the leg 7 so as to be rotatable in the left-right direction, by a front-rear rotation shaft 9 provided in the center portion in the left-right direction. ing. The seat tilting means 3 is provided between the seat receiving member 8 and the seat 2 and tilts the seat 2 in the left-right direction. The seat tilting means 3 includes a motor 10 fixed to the seat receiving member 8, a screw shaft 11 in the front-rear direction rotated by the motor 10, and a screw shaft 11 screwed to rotate the screw shaft 11. 11, a slider 12 guided along 11, a first arm 14 rotatably attached to the slider 12 by a support shaft 13 in the left-right direction, and a first arm 14.
A second arm 17 rotatably attached to the arm 14 by a lateral support shaft 15 and rotatably attached to the seat 2 by a longitudinal support shaft 16.
It has and.

The slider 12 slides as the screw shaft 11 rotates by driving the motor 10. Here, since the second arm 17 rotates only in the left-right direction,
Even if a force acts on the second arm 17 from the arm 14 in the front-rear direction, the second arm 17 does not rotate. Therefore, when the slider 12 slides, the first arm 14 rotates about the support shaft 15 connected to the second arm 17, and the second arm 1 rotates.
Move to raise and lower 7. As the second arm 17 moves up and down, the seat 2 tilts about the rotation shaft 9. The mechanism of the seat tilting means 3 is not limited to the above-described one, and a known mechanism that can tilt the seat 2 electrically and fix the seat 2 at an arbitrary position can be applied.

The seat 2 has a seat plate 18 attached to the rotary shaft 9 and the second arm 17, and a cushion 19 provided above the seat plate 18 and having the seat load sensor 4 sandwiched therebetween.
And the cushion 19 and the seat plate 18 are wrapped around the seat plate 18
And the upholstery material 20 fixed to the peripheral edge of the. A space for accommodating the vibrating body 31 is formed in the cushion 19.

The seat load sensor 4 detects the left-right balance of the load. Therefore, when a person whose spinal column is distorted in the left-right direction is seated unbalanced in the left-right direction, the distortion of the spinal column can be corrected. This seat load sensor 4
Is a surface sensor that detects the pressure due to the load on a surface (for example, Takano Co., Ltd. product name: body pressure distribution measuring device (Force
Sensitive Application (FSA))). Therefore, since the load of the seated person can be detected in a wide range,
It is possible to accurately detect the imbalance of the load.

FIG. 7 shows the load distribution on the seat 2 of the seated person, which is obtained by using the seat load sensor 4 of this embodiment.
In the example shown in the figure, the seated person is loaded on the left side in FIG. 7, and the center of gravity G is biased to the left side of the center. Therefore, the left side of the seat 2 is raised and corrected so that the center of gravity G is located in the center.

A driver 21 for controlling the motor 10 according to a detection signal from the seat load sensor 4 is connected to the motor 10 and the seat load sensor 4 of the seat tilting means 3. The driver 21 includes a straightening control means 5 and a regular control means 6, and a control circuit 22 that determines the operation of the seat tilting means 3 and a signal input circuit that receives a signal from the seat load sensor 4 and sends it to the control circuit 22. 23, a drive circuit 24 that receives a signal from the control circuit 22 and outputs a drive signal for the motor 10, and a signal output circuit 25 that receives a signal from the drive circuit 24 and drives the motor 10. Here, the driver 21 is actually a central processing unit (CP
U), the correction control means 5 and the regular control means 6 as a CPU
RAM or RO in which the control program to be realized is stored
The computer is provided with a storage device such as M and a hard disk, and an input / output device that receives a signal from the seat load sensor 4 and sends a drive signal to the seat tilting means 3.

In response to the detection result from the seat load sensor 4, the straightening control means 5 is in a state where, for example, the ratio of the left and right loads is smaller than 1: 1.3 (that is, the ratio).
When the large load is larger than the small load by 30% or more) continues for 1 to 5 minutes, the seat 2 should be maximized so that the large load becomes higher. Tilt 3 °. In this way, since it operates only when the load difference continues for a certain length of time, there is no detailed support for the seated person temporarily changing the posture or changing the load, and the sitting comfort is improved. Can be prevented from being damaged. Also, from the viewpoint of ensuring the comfort of the seated person, when the left / right load ratio remains 1: 1.3 or more for two minutes, the one with a large load should be increased. Most preferably, the seat 2 is tilted by 1 °.

Alternatively, without predetermining the angle at which the seat 2 is tilted, the load is detected by the seat load sensor 4 when the left / right load ratio remains 1: 1.3 or more for a certain period of time. However, the seat 2 may be inclined until the load ratio on the left and right is corrected to about 1: 1.

The judgment criterion of the control by the correction control means 5 is not limited to the load ratio and the duration thereof, and for example, the shear stress generated on the contact surface between the body and the seat 2 or the backrest. Alternatively, the determination may be made based on the frequency of reseating.

The regular control means 6 activates the seat tilting means 3 periodically. For example, the seat 2 is tilted at a maximum of 3 ° every 1 to 5 minutes and is sequentially changed in the order of tilting leftward → neutral → tilting rightward → neutral. Also,
To improve the flow of blood and body fluids in the occupant's spine,
Most preferably, the seat 2 is tilted every 2 minutes by at most 1 °.

The correction control means 5 and the regular control means 6 are
The regular control means 6 is controlled to operate when the correction control means 5 does not operate for a certain period of time. As a result, it is possible to prevent the regular control means 6 from performing an opposite operation while the correction control means 5 is operating. However, the regular control means 6 is not limited to be activated when the correction control means 5 has not been activated for a certain period of time, and both the correction control means 5 and the regular control means 6 are provided with switches to turn them on and off. Alternatively, only one of them may be operated.

In the chair 1, a power source 26 for driving the seat tilting means 3, the seat load sensor 4, and the driver 21 is provided at a place such as the leg 7 or the back of the seat 2 that does not interfere. . It is preferable to use a small and rechargeable battery as the power supply 26. As a result, the chair 1 can be prevented from increasing in size and a cord for supplying electric power from the outside is not required, so that the cord can be prevented from obstructing the movement of the chair 1. The power source 26 is the vibrating body 3.
It is also the power source of 1.

FIG. 8 shows a procedure for correcting the posture of the seated person in the chair 1 by operating the CPU of the computer forming the driver 21 as the correction control means 5 based on the instruction of the program stored in the storage device. A description will be given along the flow chart shown.

When the user sits down (step 1), the load is detected by the seat load sensor 4 (step 2). Then, the straightening control means 5 determines whether the left and right loads are the same (step 3).

If the left and right loads are the same (step 3;
Yes), the load is detected again (step 2). If the left and right loads are different (step 3; No), it is determined which of the left and right loads is stronger (step 4). If the left side is strong (step 4; the left side is strong), the seat tilting means 3 is operated to tilt the seat 2 so as to raise the left side (step 5). If the right side is strong (step 4; the right side is strong), the seat tilting means 3 is operated to tilt the seat 2 so as to raise the right side (step 6). When the tilting is completed, the load is detected again (step 2).

In the second embodiment, the driver 21 provided in the chair 1 is provided with the straightening control means 5 and the regular control means 6, but the present invention is not limited to this, and the straightening control means 5 and the regular control means 6 are not limited thereto. May be provided outside the chair 1.

In this case, for example, as shown in FIG. 9, the driver 21 provided in the chair 1 includes a signal input circuit 23,
Drive circuit 24, signal output circuit 25, and signal input circuit 2
The transmitter / receiver circuit 27 transmits a signal from the outside of the driver 21 and a control signal from the outside of the driver 21 to the drive circuit 24. Then, the correction control means 5 is provided in a computer separate from the chair 1.
A control circuit 22 including the regular control means 6 and determining the operation of the seat tilting means 3 and a transmission / reception circuit 28 for transmitting / receiving a signal to / from the transmission / reception circuit 27 of the driver 21 are provided. The computer here is assumed to include, for example, a central processing unit, a storage device such as a RAM, a ROM, and a hard disk, and an input / output device such as a display and a keyboard.

According to this chair 1, a computer provided outside the chair 1 can grasp the load state of the seated person and control the inclination of the seat 2 according to the load state. For this reason, by providing the control circuit 22 in the computer that the seated person is to work on, it is possible to check his / her seated state while working, and at the same time, the seat 2 is tilted to correct the posture. Like Further, in this case, the control circuit 22 is not limited to the computer used by the seated person. For example, the drivers 22 of the plurality of chairs 1 in the office are connected to one computer so that the seats of the plurality of chairs 1 are seated. The inclination angles of 2 may be centrally controlled at one place.

Further, in the above-described second embodiment, the seat load sensor 4 is used as a surface sensor. However, the present invention is not limited to this. It may be a pressure sensor that detects the shape. In this case, the number of point sensors can be minimized to two. According to this, since the point sensor is generally cheaper than the surface sensor, the cost increase of the chair 1 can be suppressed. Alternatively, if a sensor capable of detecting a slight bend of the leg 7 (for example, a strain gauge) is attached to the leg 7 as the seat load sensor 4, it can be detected by the single seat load sensor 4.

Further, in the above-described second embodiment, the seat tilting means 3 tilts the seat 2 in the left-right direction and the seat load sensor 4 detects the left-right balance of the load. However, the seat tilting means 3 may tilt the seat 2 in the front-back direction, and the seat load sensor 4 may detect the front-back balance of the load. Alternatively, the seat tilting means 3 for tilting the seat 2 left and right and front and back may be combined to allow tilting in any direction. In this case, when a point sensor is used as the seat load sensor 4, at least 4 on the front, rear, left and right sides of the seat 2 are used.
It should be installed in the place.

Further, in the above-described second embodiment, the seat 2 is entirely tilted and the seat surface is the load supporting surface 2a. However, the seat tilting means 3 is not limited to this and is seated inside the upholstery material 20 by the seat tilting means 3. A tilted load support plate may be provided so that only this load support plate is tilted and this load support plate serves as the load support surface 2a. In this case, since the seat 2 itself does not tilt, it can be easily applied to a vehicle seat or the like to which the seat 2 is fixed.

Further, in the above-described second embodiment, the seat tilting means 3 is operated only by the correction control means 5 and the regular control means 6, but the invention is not limited to this, and the operation of arbitrarily operating the seat tilting means 3 is possible. A switch may be provided. In this case, the inclination angle of the seat 2 can be set according to the preference of the seated person, so that the sitting comfort can be improved. The operation switch is preferably attached to the front end of the armrest, for example. According to this, when the forearm is placed on the armrest, the operation switch is provided at a position where the finger naturally positions, so that the operability can be improved.

Further, in the above-described second embodiment, the seat tilting means 3 fixes the height of the seat 2 only by inclining the seat 2, but the seat tilting means 3 is not limited to this, and the seat tilting means 3 is not limited to this. It may be possible to move up and down. In this case, for example, the seat tilting means 3 tilts the seat 2 in the front-back direction, and the seat 2 can be lowered when the front end portion of the seat 2 is tilted so as to rise. It is possible to prevent the front end portion of 2 from pressing the back side of the thigh. Further, since the seat 2 can be raised when the front end of the seat 2 is inclined so as to descend, the front end of the seat 2 and the floor can be kept constant and the thigh can be bent even if the knee is bent. The part can be prevented from floating from the seat surface.

Alternatively, the fact that the chair 1 can detect the balance of the load of the seated person can be used as a device for detecting spinal curvature. In this case, the seat load sensor 4 can detect at least the left and right load balance. Then, the body pressure of the seated person is detected with the seat 2 kept horizontal, and if the position of the center of gravity of the load deviates from the center,
It can be judged that the spinal column is curved in the shifted direction. It is also possible to judge the degree of curvature from the amount of deviation. According to the detection device using the chair 1, the spine curve can be detected by a simple operation that only one person can sit down and see the measurement result of the seat load sensor 4, so that the inspection can be easily performed at school, at work, or at home. Will be able to do. As a result, for example, even elementary school students can easily measure it at school or at home, and if it is determined that it is a spinal curve, it can raise the consciousness to correct the posture,
It can be expected to be effective as a solution to curvilinear scoliosis and scoliosis during the growing stage of elementary school students, which have become a problem in recent years.

Although the chair 1 is provided with the regular control means 6 in the above-described second embodiment, the present invention is not limited to this, and the regular control means 6 may not be provided. The chair 1 of this embodiment includes a seat tilting unit 3, a seat load sensor 4, and a correction control unit 5. Even in this case, it is detected by the seat load sensor 4 that the seated person is in a bad posture, and the correction control means 5 is activated to increase the load on the load supporting surface by the seat tilting means 3. So
The occupant's spine can be straightened.

In addition, also in the second embodiment, the thigh portion can be massaged by providing the vibrating body 31, as in the first embodiment.

The above-described embodiment is an example of the preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention. For example, a vibration motor is used as the vibrating body 31, but the vibration motor is not limited to the vibration motor as long as it can generate vibration. For example, vibration may be generated by an eccentric roller. That is, the vibrating body 3
An eccentric roller may be used as 1, and vibration may be generated by rotating the eccentric roller.

For a chair having a backrest 32, the vibrating body 31 may be incorporated in a position where the seatback of the backrest 32 is supported. For example, as shown in FIG. 10, the vibrating body 31 may be incorporated in the backrest 32 at a position 34 that supports the waist of a seated person. With such a configuration, the lower back can be massaged, blood circulation in the lower back can be improved, and lower back pain can be prevented. You can also change your mind. In addition, a position 34 for supporting the waist of the seated person of the backrest 32
It is needless to say that the vibrating body 31 may be incorporated in another position instead of or in addition to the position 34.

Further, the vibrating body 31 may be operated by a timer (not shown), and the vibration may be automatically stopped when a predetermined time elapses after the start of the vibration.

Further, instead of using the battery as the power source of the vibrating body 31 and the motor 10, a commercial power source may be used. That is, a power cord may be provided, and the power cord may be extended and connected to an outlet installed on a wall or the like in the room to supply power to the vibrating body 31 and the motor 10.
The power cord is preferably a winding type. That is, it is preferable to provide a reel for automatically winding up the power cord, and to wind the power cord around the reel for compact storage when not in use, and to pull out the power cord from the reel for use. A biasing force acts on the reel in the cord winding direction, and when the reel is unlocked by a button operation, the reel rotates in the cord winding direction to automatically wind the power cord. On the other hand, the power cord can be pulled out by pulling the power cord wound on the reel against the biasing force.

Further, instead of using the battery or the commercial power source as the power source of the vibrating body 31 and the motor 10, a solar cell is used, or the solar cell or the commercial power source is used in combination with a rechargeable secondary battery. You may do it.

Further, in addition to the position 33 for supporting the thigh of the seat 2, the vibration member 31 may of course be incorporated in other positions.

The vibration of the vibrating body 31 may be weakened immediately after starting and then gradually strengthened. By gradually increasing the strength of the vibrating body 31, it is possible to prevent the seated person from being surprised at the sudden start of the vibrating body 31.

Further, for example, a pressure detecting sensor may be provided on the seat 2 so that the vibrating body 31 is automatically started by the sitting of the seated person.

[0064]

As described above, in the chair according to the first aspect of the invention, the vibrating body is incorporated at a position for supporting the thigh of the seated occupant, so that the thigh which tends to be compressed by the seat is You can massage. For this reason, it is possible to promote the flow of blood and body fluid below the knee, and it is possible to prevent the formation of a blood clot even when sitting in the same posture for a long time. Moreover, since the thighs can be massaged, it is possible to recover from fatigue and change the mood. Moreover,
Since the seat can be rotated with respect to the legs and is equipped with moving means such as casters, this chair can be used, for example, in desk work in the office, and massage can be easily performed between desk work. You can

Further, in the chair according to the second aspect, since the backrest is provided and the vibrating body is incorporated at a position for supporting the seated person of the backrest, the back and waist of the seated person can be massaged.

Further, in the chair according to the third aspect, since the bent spinal column of the seated person can be straightened by the straightening control means, it is possible to suppress adverse effects on the body such as low back pain and economy syndrome. Further, since the seat is regularly tilted by the regular control means, it is possible to suppress the adverse effect on the body due to congestion or the like even when sitting for a long time in the correct posture.

Further, in the chair according to the fourth aspect, when the seated person's spinal column is bent in the left-right direction and the body pressure balance is deteriorated, the bending of the spinal column in the left-right direction can be corrected.

Further, in the chair according to the fifth aspect, since the seat load sensor is the surface sensor provided inside the seat, it is possible to accurately detect the imbalance of the load of the seated person.

Further, in the chair according to the sixth aspect, since the seat load sensor is the point sensor provided inside the seat, the point sensor is less expensive than the surface sensor, so that the increase in the cost of the chair can be suppressed. You can

Further, in the chair according to the seventh aspect, since the chair is provided with the operation switch for arbitrarily actuating the seat tilting means, the seat position can be set according to the preference of the seated person, and the sitting comfort is enhanced. be able to.

Further, in the chair according to the eighth aspect, the seat can be lowered when the front end of the seat is tilted so as to rise, so that the front end of the seat is prevented from pressing the back side of the thigh. it can. Also, since the seat can be raised when the front end of the seat is tilted so as to descend, the front end of the seat and the floor are kept at a constant distance, and the thighs will not move from the seat surface even if the knee is bent. It can be prevented from floating.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of a chair to which the present invention is applied.

FIG. 2 is a plan view of the chair of FIG.

3 is a side view of the chair of FIG. 1. FIG.

FIG. 4 is a front view of the main part of the second embodiment of the chair to which the present invention is applied.

5 is a perspective view showing a main part of the chair shown in FIG. 4. FIG.

6 is a block diagram showing a signal flow of the chair of FIG.

7 is a diagram showing a load distribution on a seat of a seated person, which is detected by a surface sensor of the chair of FIG.

FIG. 8 is a flowchart showing the operation of the chair straightening control means shown in FIG. 4;

9 is a block diagram showing another example of the signal flow of the chair of FIG.

FIG. 10 is a front view showing a third embodiment of the chair to which the present invention is applied.

[Explanation of symbols]

1 chair Two seats 2a Load bearing surface 3 Seat tilting means 4 seat load sensor 5 Correction control means 6 Periodic control means 7 legs 30 means of transportation 31 Vibrating body 32 backrest 33 Position to support the seated thigh

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Claims (8)

[Claims] 1. A chair provided with a seat rotatably attached to a leg in a left-right direction and a moving means attached to the leg, wherein the vibrating body is positioned to support a thigh of a seated person on the seat. A chair characterized by incorporating. 2. The chair according to claim 1, further comprising a backrest, wherein the vibrating body is incorporated in a position for supporting a seated person of the backrest. 3. An electric seat tilting means capable of inclining a load supporting surface for supporting a load applied to the seat by a seated person and fixing the load supporting surface at an arbitrary inclination angle, and a load supporting surface for supporting the load on the seated person. A seat load sensor for detecting the balance, and a correction control means for operating the seat tilting means so as to increase the one on which the load of the load supporting surface is heavily applied in response to the detection result from the seat load sensor, The chair according to claim 1 or 2, further comprising: a periodic control unit that periodically operates the seat tilting unit. 4. The seat tilting means tilts the load support surface in the left-right direction, and the seat load sensor detects the left-right balance of the load. The listed chair. 5. The seat load sensor is a surface sensor provided inside the seat, according to claim 3 or 4.
The listed chair. 6. The seat load sensor is a point sensor provided inside the seat, according to claim 3 or 4.
The listed chair. 7. The chair according to claim 3, further comprising an operation switch for arbitrarily turning on / off the operation of the seat tilting means. 8. A seat elevating means for elevating and lowering the seat and the seat tilting means.
Chair described in any of.