KR20090067459A - Chair - Google Patents

Abstract

A chair is provided to relieve the accumulated fatigue, to correct the incorrect figure of the human body and to be used irrespective of the condition of figure. A chair comprises a sitting plate(200) which comprises a first sitting plate(210) and a second sitting plate(220) separated from the first sitting plate by a certain distance; a neck massage device(300) which is installed at the supporting rod projected from the back of a chair frame(400) upward; a pair of back supporting devices(100) which are installed in the transverse direction so as to be located at the back right and left sides of the sitting plate; and a rotating back supporting device(120) which is installed on the back supporting installation shaft(110).

Description

Chair {CHAIR}

The present invention relates to a chair, and more particularly, to a chair that can be conveniently used in various places without being limited to the body condition, and can exhibit the effect of relieving the accumulated fatigue and correcting the body shape.

In general, chairs have been used as essential necessities for humans for many years. In addition, as the society is modernized, the time for living in a chair increases, and accordingly, the type and shape of the chair have also been variously developed according to the purpose of use, use, place of use, and the like.

As a representative chair used in recent years, as shown in FIG. 1, a chair 10 having two backrests 12 separated from each other to prevent and correct deformation of the spine has been proposed and widely used.

Although the chair 10 has some effects on preventing and correcting the spine, the chair 10 has no effect on the stiffness and pain of the neck joint due to various stresses. Back stiffness and accumulated fatigue could not be resolved.

However, for the purpose of relieving stiffness and fatigue of the buttocks and back parts, medical chairs such as massage chairs are conceived, but such chairs are bulky and complicated in structure, requiring a large installation space, and thus, for office and learning purposes. It can not be used at all, and the selling price is very expensive, the general consumer can not easily use the disadvantage.

In addition, the above-described conventional chairs are used by a user who has a lower than or average body shape or a user with a disability in a specific body part by making a reference to an average body shape such as a seat plate on which the buttocks are seated, a back plate in which the back part contacts, etc. at the time of manufacture. It was very uncomfortable to follow.

The present invention is to solve the conventional problems as described above, and can be conveniently used in various places without being limited to the body condition, to provide a chair to exhibit the effect of reducing the accumulated fatigue and correction of the body shape There is a purpose.

The chair for achieving the object of the present invention as described above, in the chair, the first seat plate is formed on one side of the chair frame for seating of the buttocks, and the spaced at a predetermined interval to correspond to the first seat plate A seat plate including a second seat plate formed on the other side of the chair frame to seat the other buttocks; Neck massage device is installed on the support bar protruding upward from the rear side of the chair frame to pressurize, massage the neck of the human body; And a pair of backrest installation shafts installed in a longitudinal direction to be positioned at the rear left and right sides of the seat plate, and a backrest device including rotatably installed on the backrest installation shaft so that the back part of the human body is seated. It is characterized by.

A chair for achieving the object of the present invention as described above, the chair having a backrest device, the backrest device, a pair of backrest mounting shaft is installed in the longitudinal direction on the left and right of the rear of the seat plate; It characterized in that it comprises a rotatable back that is rotatably installed on the backrest installation shaft so that the back portion of the human body is seated.

The rotating backrest is formed to form at least two or more contact surfaces in a predetermined angle range on the backrest body, and have different shapes.

It may include a plurality of massage pieces installed on any one of the contact surface.

And, the vibrator is installed inside the vibration to the backrest body; A control unit for controlling the driving of the vibrator; A signal input unit for inputting a driving signal of the vibrator; And a power supply unit for supplying power to the vibrator, the controller, and the signal input unit.

An air bag installed inside the backrest body and having an inlet for inflow of air; A compressed air generating device for generating compressed air supplied through a supply hose to the inlet; A control unit for controlling the driving of the compressed air generator; A signal input unit for inputting a driving signal of the compressed air generator; And a power supply unit for supplying power to the compressed air generator, the control unit, and the signal input unit.

A far-infrared lamp installed to be exposed to the surface of the backrest body; A controller for controlling light emission of the far infrared lamp; A signal input unit for inputting a light emission signal of the far infrared lamp; And a power supply unit for supplying power to the far infrared lamp, the control unit, and the signal input unit.

The backrest mounting shaft may include an expansion joint member to have flexibility in response to an external force applied to the rotational backrest.

Rotation prevention means may be provided on the backrest installation shaft to selectively restrain the rotation of the backrest.

The backrest mounting shaft may be configured to be movable from the chair frame to allow distance adjustment in the width direction.

A chair for achieving the object of the present invention as described above, the chair having a seat plate seated on the chair frame, the seat plate is formed on the one side of the chair frame is formed for seating one buttocks 1 seat plate; And a second seat plate formed on the other side of the chair frame spaced at predetermined intervals so as to correspond to the first seat plate to seat the other hip.

The first seat plate and the second seat plate are installed on a seat plate support member formed in the chair frame, the first elastic body for flexibility in the vertical portion in the horizontal portion of the seat plate support member, and in the left and right directions in the vertical portion A second elastic body for flexibility can be installed.

It may include a plurality of massage pieces installed on the surface of the first seat plate and the second seat plate.

A vibrator installed therein to generate vibrations in the first and second seat plates; A control unit for controlling the driving of the vibrator; A signal input unit for inputting a driving signal of the vibrator; And a power supply unit for supplying power to the vibrator, the controller, and the signal input unit.

An air bag installed inside the first and second seat plates and having an inlet for inflow of air; A compressed air generating device for generating compressed air supplied through a supply hose to the inlet; A control unit for controlling the driving of the compressed air generator; A signal input unit for inputting a driving signal of the compressed air generator; And a power supply unit for supplying power to the compressed air generator, the control unit, and the signal input unit.

Far-infrared lamps are installed to be exposed to the surface of the first and second seat plate; A controller for controlling light emission of the far infrared lamp; A signal input unit for inputting a light emission signal of the far infrared lamp; It may include a power supply for supplying power to the far infrared lamp, the control unit, and the signal input unit.

A chair for achieving the object of the present invention as described above, the support rod protruding upward from the rear side of the chair frame; And installed on the support rods press the neck portion of the human body, the massage is characterized in that it comprises a neck massage device.

The neck massage device, the left and right pressure body to be in close contact with the left and right of the neck to apply a pressing force; Connecting means connected at one end to the pressure body and the other end to the support rod to support the left and right pressure bodies in a flowable manner; And the left and right pressurized body is collected inward may include a pressing force member for transmitting the pressing force to the neck portion of the human body.

The connecting means, the elastic member is formed so that one side is connected to the back of the left and right pressure body and has flexibility; A connection member having a connection pipe connected to the other side of the elastic member and connected to the support rod; And a fastening member for fixing the connection member and the support bar, and adjusting the fastening height of the fastening member to adjust the installation height of the left and right pressure bodies.

The connecting means, the elastic member is formed so that one side is connected to the back of the left and right pressure body and has flexibility; A connection member having a connection pipe connected to the other side of the elastic member and connected to the support rod; A rack formed on the support rod; And a lifting motor provided on the connecting member and having a drive gear meshed with the rack, and the installation height of the pressure body can be adjusted by a driving operation of the lifting motor.

A vibrator installed therein to generate vibrations in the left and right pressure bodies; A control unit for controlling the driving of the vibrator; A signal input unit for inputting a driving signal of the vibrator; And a power supply unit for supplying power to the vibrator, the controller, and the signal input unit.

An air bag installed in the left and right pressure bodies and having an inlet for inflow of air; A compressed air generating device for generating compressed air supplied through a supply hose to the inlet; A control unit for controlling the driving of the compressed air generator; A signal input unit for inputting a driving signal of the compressed air generator; And a power supply unit for supplying power to the compressed air generator, the control unit, and the signal input unit.

Far infrared ray lamp is installed to be exposed to the surface of the left and right pressure body; A controller for controlling light emission of the far infrared lamp; A signal input unit for inputting a light emission signal of the far infrared lamp; It may include a power supply for supplying power to the far infrared lamp, the control unit, and the signal input unit.

It may include a plurality of massage pieces are installed to contact the neck portion of the human body on the surface of the left and right pressure body.

The massage paper may be selected from any one of a group consisting of jade, phosphate, ocher fired body, ceramic fired body, crystals containing tourmaline powder, and crystals containing chitosan powder.

According to the chair according to the present invention as described above, the backrest device can support and massage the user's back portion by a pair of rotational backrest, and the seat plate on which the buttocks are seated is separated into two to improve seating and breathability The user can massage the neck part of the user by the neck massage device, thereby reducing fatigue and correcting the body shape. In addition, since the back plate as well as the seat plate is also formed into two separate body conditions can be expected to be useful to anyone without limitation.

Best Mode for Carrying Out the Invention Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, FIGS. 2 to 6, and like reference numerals are used to refer to like elements within the confusion ranges. Meanwhile, the drawings and detailed descriptions of configurations, operations, and effects that can be easily understood by those skilled in the art from general techniques in each drawing will be briefly or omitted. For example, in the accompanying drawings, the shape, size, and the like of the components forming the chair are illustrated as briefly as possible to help understanding.

2 is a view schematically showing a chair according to a preferred embodiment of the present invention.

As shown in FIG. 2, the chair according to the present invention includes a backrest device 100 in which a user's back is in close contact, a seat plate 200 in which the user is seated, and a neck massage device 300 for massaging a neck of the user. ), But not limited to the body condition, anyone can conveniently use, and configured to exhibit the effect of relieving the accumulated fatigue and correcting the body shape.

The backrest device 100 is rotatably installed on the backrest installation shaft 110 so that the backrest installation shaft 110 is connected to the left and right directions from the chair frame 400 and the back portion of the human body, respectively. The backrest 120 is provided.

Seat plate 200 is seated on the other side of the seat frame 400 on the other side of the chair frame 400 to correspond to the first seat plate 210 and the first seat plate 210 formed on one side of the chair frame 400, one side It is composed of a second seat plate 220 formed for.

The neck massage device 300 is configured on the support rod 390 protruding upward from the rear side of the chair frame 400 or the support rod 390 protruding from the back of the chair for the installation of the headrest 500. To press and massage the neck.

In addition, the chair frame 400 of the chair according to the present embodiment includes a height adjusting device 610 and a wheel 620 for mobility of the chair to adjust the height of the seat plate, and supports for supporting the overall load. Of course, the device 600 is provided. In addition, the armrest device 700 that can put the user's arm is configured on the chair frame 400 or the seat plate 200.

On the other hand, in the accompanying drawings, Figure 2 is shown that the backrest device 100, the seat plate 200, and the neck massage device 300 according to the present embodiment are all configured in a single chair, but is not limited thereto. At least one or more of the backrest device 100, the seat plate 200, and the neck massage device 300 according to the present embodiment may be selectively applied to a conventional chair.

Hereinafter, specific configurations of the backrest device 100, the seat plate 200, and the neck massage device 300 applied to the present embodiment will be described in detail.

3 is a perspective view showing a backrest device of a chair according to a preferred embodiment of the present invention.

Referring to FIG. 3, the backrest device 100 includes at least a predetermined angle range on the backrest installation shaft 110 and the backrest body 121 configured as a pair of left and right so as to have flexibility in the chair frame 400. The backrest 120 is configured to have two or more contact surfaces 122.

In this case, the contact surface 122 formed on the rotational back 120 may form a curved surface applied to a conventional backrest in consideration of adhesion to the back part of the human body, but each contact surface 122 is different from each other. It is formed in the form. For example, as shown in Figure 3, one side contact surface 122 is formed to be used as a conventional backrest, the other side is configured to massage the back of the human body.

For example, the contact surface 122 in which the massage function is performed may attach a plurality of massage pieces 800 or bury the inside of the rotary back 120.

Such, massage piece 800 may be configured by selecting any one selected from the group consisting of jade, phosphate, ocher plastics and ceramic plastic material is far infrared radiation. At this time, the shape of the massage piece 800 is formed in a curved structure so as not to cause pain during contact with the back portion of the human body.

In addition, the massage piece 800 may be composed of crystals containing any one of tourmaline and chitosan powder in which anion is emitted, and in addition, various natural products or compositions beneficial to the human body may be applied.

Although not shown in detail in the drawings, a massage function may be performed by including a vibrator generating vibrations inside the backrest body 121. When the vibrator is configured as described above, a control unit for controlling the driving of the vibrator and a signal input unit for controlling driving of the vibrator on / off, adjustment of strength and weakness, and operation time are provided. The signal input unit may be configured as a key button, a dial button, or a remote controller system. When the signal input unit is a remote controller, a receiver for receiving a signal may be provided in the backrest body.

In addition, the compressed air system may be applied as a device for correcting or massage the back of the human body. Such a device is installed in the backrest body 121 and includes an air bag having an inlet for inflow of air, and a compressed air generator for generating compressed air supplied through a supply hose to the inlet, and a compressed air generator. It may include a control unit for controlling the drive, and a signal input unit for inputting a drive signal of the compressed air generating device.

In this case, the compressed air generating device is preferably a small compression pump applied to a blood pressure monitor, and the like, and the signal input unit may be configured similarly to the signal input unit applied for driving the vibrator.

In addition, a system using far infrared rays can be applied as a device for massaging the back of the human body. Such a system may include a far-infrared lamp installed to be exposed to the surface of the backrest body 121, a controller for controlling light emission of the far-infrared lamp, and a signal input unit for inputting a light emission signal of the far-infrared lamp.

In addition, a power supply unit for supplying power to the components required for the above-described devices for massage the back of the human body is provided. The power supply unit may be provided to be connected to an external commercial power supply using an adapter or the like, or may be configured as a rechargeable battery.

On the other hand, the backrest mounting shaft 110 is installed on the left and right sides of the floor-side chair frame 400, the seat plate 200 is installed, as shown in Figure 3, but not shown in the drawing, the headrest 500 or the backrest To the left and right sides of the support bar 390 to be addressed to the chair frame 400 may be formed.

The backrest mounting shaft 110 installed as described above is configured such that the rotational backrest 120 has flexibility in response to an external force applied in the process of seating the user's back portion on the rotary backrest 120. In the manner for the flexibility of the backrest mounting shaft 110, the backrest mounting shaft 110 itself, or in the form of installing the expansion joint member 900 between the backrest mounting shaft 110 and the chair frame 400. Can be configured.

The expansion joint member 900 installed in the longitudinal direction on the backrest mounting shaft 110 has the rotational back 120 flexible to the longitudinal axis, and is installed between the backrest mounting shaft 110 and the chair frame 400. The expansion joint member 900 serves to make the rotational back 120 flexible with respect to the longitudinal axis.

The expansion joint member 900 may be formed of a rubber elastic body formed of a high elastic rubber material, or may be formed of a coil elastic body formed by coupling a coil spring between both fixing plates.

In addition, the rotational back 120 is provided with rotation preventing means 130 for selectively restraining the rotation operation. The anti-rotation means 130 may be configured in various forms as long as it can selectively restrain the rotary back 120, in the present embodiment a plurality of restraint grooves 132 on the upper surface of the rotary back 120 And a fixing cap 134 having a fixing part 134a press-fitted into the backrest mounting shaft 110 and a locking protrusion 134b inserted into the restraint groove 132.

When the fixed cap 134 configured as described above is inserted deep into the backrest installation shaft 110, the locking protrusion 134b is inserted into the restraint groove 132 and the rotation operation of the rotary backrest 120 is stopped, and the fixed cap 134 is fixed. When moved upward by a predetermined distance of the locking projection 134b is separated from the restraint groove 132, the rotational back 120 is converted into a rotatable state. At this time, the fixing portion 134a is formed with a protrusion to be fit inside the backrest installation shaft 110.

The backrest device 100 applied to the chair according to the present embodiment is configured such that the backrest installation shaft 110 is movable in the transverse direction from the chair frame 400 so that users of various body types can use it. Such a configuration for securing the lateral mobility may be configured by separating the backrest mounting shaft 110 into two, while the one backrest mounting shaft 110 is slidably moved while being inserted into the other backrest mounting shaft. At this time, the corresponding backrest mounting shaft 110 is formed with a pin insertion hole 114 for the insertion of the fixing pin 116 at regular intervals.

As described above, the operation of the chair according to the present embodiment will be described briefly. The backrest device 100 includes a pair of rotational backrests 120, and the rotational backrest 120 is provided to have flexibility. Since it is installed on the shaft 110, anyone can use it conveniently without being limited to the body shape condition (back part shape) of the human body, and the back part is supported by a pair of left and right rotating backrests 120 so that the correction effect of the body shape Can exert. In addition, since various massage mechanisms including the massage piece 800 are provided on the rotational back 120, the fatigue accumulated in the human body can be eliminated using this, and a beneficial effect on the human body can be performed.

4 is a perspective view showing a seat plate of a chair according to a preferred embodiment of the present invention.

Referring to FIG. 4, the seat plate 200 applied to the chair according to the present invention includes a first seat plate 210 and a first seat plate 210 formed on one side of the chair frame 400 for seating of one buttocks. The second seat plate 220 is formed on the other side of the chair frame to be seated so as to correspond to the seat. That is, the characteristic structure of the seat plate according to the present invention is that the seat plate 200 is divided into two, formed and formed so that the space portion is provided in contact with each other. According to this structure, sufficient ventilation can be secured through the space part. At this time, the groove portion 212 is formed so that the coccyx (tail bone) part of the human body in direct contact with the seat plate surface.

In addition, the basic structures of the first seat plate 210 and the second seat plate 220 are formed in a structure similar to the seat plate of various forms applied to a conventional chair. That is, the thin plate-like member is made of only one, or consists of a structure in which the cushion layer and the cover pad are formed in turn on the upper surface of the plate.

The first seat plate 210 and the second seat plate 220 are coupled to the seat plate support member 230 formed in the chair frame 400, wherein the first and second seat plates 210 and 220 are vertically and horizontally disposed. The seat plate support member 220 is configured to have such flexibility to have flexibility. As a member for securing flexibility, the expansion joint member 900 installed on the backrest installation shaft 110 may be applied.

For example, the seat plate supporting member 230 having a “b” shape is installed on the left and right sides of the chair frame 400, the first elastic body 910 is installed on the horizontal portion thereof, and the second elastic body 920 is arranged on the vertical portion thereof. You can configure it by installing it.

In addition, on the surfaces of the first seat plate 210 and the second seat plate 220, a plurality of massage pieces 800 may be configured to massage the buttocks of the human body. Since the type and shape of the massage piece 800 is similar to that provided in the above-described rotary back 120, a detailed description thereof will be omitted.

In addition, the oscillator is installed therein so as to generate vibration in the first and second seat plates 210 and 220 so as to massage the buttocks of the human body by the vibration method, a control unit for controlling the driving of the vibrator, and a drive signal of the vibrator. It may be provided with a signal input unit for input.

In addition, the compressed air system may be applied as a device for correcting or massaging the buttocks of the human body. These devices are installed in the first and second seat plates (210, 220) and the air bag having an inlet for the inflow of air, compressed air generating device for generating compressed air supplied through the supply hose to the inlet, compressed air It may include a control unit for controlling the driving of the generator, and a signal input unit for inputting a drive signal of the compressed air generator.

In addition, as a device for massaging the buttocks of the human body, a system using far infrared rays as shown in the description of the backrest device can be applied. That is, it may include a far-infrared lamp installed to be exposed to the surface of the first and second seat plates (210, 220), a control unit for controlling the light emission of the far-infrared lamp, and a signal input unit for inputting the light emission signal of the far-infrared lamp.

Briefly explaining the operation of the chair provided with the seat plate 200 as described above, the seat plate is divided into a first seat plate 210 and a second seat plate 220, the first and second seat plate is flexible Since it is installed on the seat plate support member 230 provided to have, without limitation to the body shape conditions (size or shape of the buttocks) of the human body, anyone can conveniently use, the first seat plate 210 and the second seat plate 220 are each It can stably support one side of the buttocks to exert the effect of the correction of the body shape, the separation of the seat plate 200 is secured breathability can be expected to improve the hygiene, and various massage mechanisms including the massage piece (800) on the seat plate Since it can be used to eliminate the accumulated fatigue in the human body, it can perform a beneficial effect on the human body.

5 is a perspective view showing a neck massage device of a chair according to a preferred embodiment of the present invention.

Referring to Figure 5, the neck massage device 300 applied to the chair according to the present invention, the left and right pressing body 310, the left and right pressing body 310 to be in close contact with the left and right of the neck to apply the pressing force to support the flowable One end is connected to the pressurizing body 310 and the other end is connected to the supporting means 320, 390, and the pressing force actuating member for collecting the pressing force to the inside of the body of the right and left pressurizing body 310 is collected inward 330.

The left and right pressing body 310 may be provided with a pressing portion protruding to press the left and right sides of the neck on a single body, in this embodiment the pressing body 310 for pressing the left and right sides of the neck is divided into a separate body, It is formed, the appearance of the seating groove 314 is formed so as to surround the neck portion.

And, the surface of the left and right pressure body 310 is provided with a plurality of massage pieces 800 are installed to contact the neck portion. Since the type and shape of the massage piece is similar to that provided in the above-described rotary backrest, a detailed description thereof will be omitted.

The neck massage device 300 is configured to be movable up and down by the connecting means 320 to the support rod 390, it is configured to be movable in the vertical direction.

An example of such a connecting means 320 includes a pair of expansion and contraction members 322, a connection member 324, and a fastening member 326, as shown in FIG. 5. It is configured to adjust the installation height of the pressing body 310 by adjusting the fastening height.

The elastic member 322 is configured to be connected to one side of the back of the pressing body 310, is formed to be wrinkled in the form of a bellows by a material such as rubber to have flexibility.

The connection member 324 includes a connection portion 324a to which the other side of the elastic member 322 is coupled, and a connection pipe 324b connected to the support rod 390.

The pressing force acting member 330 may be configured in various forms as long as it is a means for collecting the left and right pressurizing bodies 310 inwardly. However, in this embodiment, the pressing force acting member 330 is installed so that the pulling force is applied between the elastic members 322. Consisting of tension coil springs.

6 is a perspective view showing another example of the neck massage apparatus of the chair according to the preferred embodiment of the present invention, whereby the installation height of the neck massage apparatus 300 can be conveniently adjusted by a simple switching operation.

That is, another example of the neck massage device is provided with a left and right pressing body 310 and the connecting means 320, as shown in Figure 6, the connecting means 320 is connected to one side of the back of the pressing body 310 A pair of elastic members 322 formed of a flexible material, a connecting member 324 having a connecting pipe 324b formed on the other side of the elastic member 322 and connected to the supporting rod 390, and a supporting rod 390. The lifting motor 325 includes a lifting motor 325 having a rack 321 formed thereon and a driving gear 323 mounted to the connecting member 324 and engaged with the rack 321. The height of the installation of the pressing body 310 is adjusted by the driving operation.

The connecting member 324 is provided with a connecting portion 324a to which the other side of the elastic member 322 is coupled, and a connecting pipe 324b connected to the support rod 390, and a gear insertion hole is drilled at the rear side of the connecting pipe 324b. The drive gear 323 is meshed with the rack 321 is configured to be inserted.

In addition, in order to massage the neck portion of the human body by the vibration method, the oscillator, a control unit, and a signal input unit installed therein so as to generate a vibration in the pressurized body 310, or installed in the pressurized body 310 And an air bag having an inlet for inlet of air, a compressed air generator for generating compressed air supplied through a supply hose to the inlet, a controller for controlling the driving of the compressed air generator, and a compressed air generator. A signal input unit for inputting a driving signal may be provided.

In addition, it may include a far-infrared lamp installed to be exposed to the surface of the pressing body 310, a control unit for controlling the light emission of the far-infrared lamp, and a signal input unit for inputting the light emission signal of the far-infrared lamp.

As described above, the chair according to the preferred embodiment of the present invention is shown in accordance with the above description and drawings, but this is merely described for example, and various changes and modifications can be made without departing from the spirit of the present invention. It will be appreciated by those skilled in the art.

1 is a perspective view showing a conventional chair,

2 is a view schematically showing a chair according to a preferred embodiment of the present invention;

3 is a perspective view showing a backrest device of a chair according to a preferred embodiment of the present invention;

4 is a perspective view showing a seat plate of a chair according to a preferred embodiment of the present invention;

5 is a perspective view showing a neck massage device of a chair according to a preferred embodiment of the present invention;

6 is a perspective view showing another example of a neck massage device of a chair according to a preferred embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

100: backrest device 110: backrest mounting shaft

120: rotating back 130: rotation preventing means

200: seat 210: first seat

220: second seat 300: neck massage device

310: pressurized body 320: connecting means

330: pressing force member 400: chair frame

500: headrest 600: support device

700: armrest device 800: massage

900: expansion joint member

Claims (25)

In the chair, A first seat plate formed on one side of the chair frame for seating on one side of the buttocks, and a second seat plate formed on the other side of the chair frame spaced at a predetermined interval to correspond to the first seat plate on the other side of the seat frame. Seat plate; Neck massage device is installed on the support bar protruding upward from the rear side of the chair frame to pressurize, massage the neck of the human body; And And a pair of backrest installation shafts installed in a longitudinal direction so as to be located at the rear left and right sides of the seat plate, and a backrest device including rotatably installed on the backrest installation shaft so that the back part of the human body is seated. Chair features. A chair having a backrest device, The backrest device, A pair of backrest mounting shafts installed in the longitudinal direction on the left and right sides of the rear of the seat plate; And a rotational backrest that is rotatably installed on the backrest installation shaft so that the back portion of the human body is seated. The method according to claim 1 or 2, Wherein the backrest, the chair is characterized in that at least two or more contact surfaces are formed in a predetermined angle range on the backrest body, so as to form a different shape. The method of claim 3, Chair comprising a plurality of massage pieces installed on any one of the contact surface. The method according to claim 1 or 2, A vibrator installed therein to generate vibration in the backrest body; A control unit for controlling the driving of the vibrator; A signal input unit for inputting a driving signal of the vibrator; And And a power supply unit for supplying power to the vibrator, the controller, and the signal input unit. The method according to claim 1 or 2, An air bag installed inside the backrest body and having an inlet for inflow of air; A compressed air generating device for generating compressed air supplied through a supply hose to the inlet; A control unit for controlling the driving of the compressed air generator; A signal input unit for inputting a driving signal of the compressed air generator; And And a power supply unit for supplying power to the compressed air generator, the control unit, and the signal input unit. The method according to claim 1 or 2, A far-infrared lamp installed to be exposed to the surface of the backrest body; A controller for controlling light emission of the far infrared lamp; A signal input unit for inputting a light emission signal of the far infrared lamp; And And a power supply unit for supplying power to the far-infrared lamp, the control unit, and the signal input unit. The method according to claim 1 or 2, The backrest mounting shaft is characterized in that the chair is provided with an elastic joint member to have flexibility in response to the external force applied to the backrest. The method according to claim 1 or 2, And a rotation preventing means on the backrest mounting shaft to selectively restrain the rotation of the backrest. The method according to claim 1 or 2, The backrest mounting shaft is a chair, characterized in that configured to be movable from the chair frame to allow distance adjustment in the width direction. A chair having a seat plate on which a buttocks are seated on a chair frame, The seat plate, A first seat plate formed on one side of the chair frame to seat one buttocks; And And a second seat plate formed on the other side of the chair frame spaced at predetermined intervals so as to correspond to the first seat plate to seat the other hip. The method according to claim 1 or 11, wherein The first seat plate and the second seat plate are installed on a seat plate support member formed in the chair frame, the first elastic body for flexibility in the vertical portion in the horizontal portion of the seat plate support member, and in the left and right directions in the vertical portion A chair characterized in that a second elastic body is installed for flexibility. The method according to claim 1 or 11, wherein And a plurality of massage pieces provided on the surfaces of the first seat plate and the second seat plate. The method according to claim 1 or 11, wherein A vibrator installed therein to generate vibrations in the first and second seat plates; A control unit for controlling the driving of the vibrator; A signal input unit for inputting a driving signal of the vibrator; And And a power supply unit for supplying power to the vibrator, the control unit, and the signal input unit. The method according to claim 1 or 11, wherein An air bag installed inside the first and second seat plates and having an inlet for inflow of air; A compressed air generating device for generating compressed air supplied through a supply hose to the inlet; A control unit for controlling the driving of the compressed air generator; A signal input unit for inputting a driving signal of the compressed air generator; And And a power supply unit for supplying power to the compressed air generator, the control unit, and the signal input unit. The method according to claim 1 or 11, wherein Far-infrared lamps are installed to be exposed to the surface of the first and second seat plate; A controller for controlling light emission of the far infrared lamp; A signal input unit for inputting a light emission signal of the far infrared lamp; And a power supply unit for supplying power to the far-infrared lamp, the control unit, and the signal input unit. In the chair, A support rod protruding upward from the rear side of the chair frame; And The chair is installed on the support bar to press the neck portion of the human body, the massage comprises a neck massage device. The method according to claim 1 or 17, The neck massage device, Left and right pressing bodies in close contact with the left and right of the neck to apply a pressing force; Connecting means connected at one end to the pressure body and the other end coupled to the support rod to support the left and right pressure bodies in a flowable manner; And The chair, characterized in that the left and right pressurized body is collected inward to include a pressing force member for transmitting the pressing force to the neck portion of the human body. The method of claim 18, The connecting means, An elastic member having one side connected to the rear surfaces of the left and right pressure bodies and having flexibility; A connection member having a connection pipe connected to the other side of the elastic member and connected to the support rod; And A fastening member for fixing the connection member and the support rod, The chair characterized in that to adjust the height of the installation of the left and right pressure body by adjusting the fastening height of the fastening member. The method of claim 18, The connecting means, An elastic member having one side connected to the rear of the left and right pressure bodies and having flexibility; A connection member having a connection pipe connected to the other side of the elastic member and connected to the support rod; A rack formed on the support rod; And A lifting motor provided on the connecting member and having a drive gear meshed with the rack; A chair characterized in that to adjust the installation height of the pressurized body by the drive operation of the lifting motor. The method according to claim 1 or 17, A vibrator installed therein to generate vibrations in the left and right pressure bodies; A control unit for controlling the driving of the vibrator; A signal input unit for inputting a driving signal of the vibrator; And And a power supply unit for supplying power to the vibrator, the controller, and the signal input unit. The method according to claim 1 or 17, An air bag installed in the left and right pressure bodies and having an inlet for inflow of air; A compressed air generating device for generating compressed air supplied through a supply hose to the inlet; A control unit for controlling the driving of the compressed air generator; A signal input unit for inputting a driving signal of the compressed air generator; And And a power supply unit for supplying power to the compressed air generator, the control unit, and the signal input unit. The method according to claim 1 or 17, Far infrared ray lamp is installed to be exposed to the surface of the left and right pressure body; A controller for controlling light emission of the far infrared lamp; A signal input unit for inputting a light emission signal of the far infrared lamp; And a power supply unit for supplying power to the far-infrared lamp, the control unit, and the signal input unit. The method according to claim 1 or 17, Chair comprising a plurality of massage pieces are installed to contact the neck of the human body on the surface of the left and right pressurized body. The method of claim 24, The massage piece is selected from the group consisting of jade, phosphate, ocher firing body, ceramic firing body, crystals containing tourmaline powder, and crystals containing chitosan powder.

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