Massage chair

Abstract

The present invention relates to a massage chair, and a massage chair according to an embodiment of the present invention includes a first arm equipped with a first massage ball, a second arm equipped with a second massage ball and rotatably coupled to the first arm, and a connecting part that connects the first arm and the second arm and rotates eccentrically from the first arm to adjust the distance between the first massage ball and the second massage ball.

Description

[Technical Field]

[0001] The present invention relates to a massage chair. [Background technology]

[0002] Recently, interest in massage equipment has grown due to the increasing demand for at-home massage to loosen stiff muscles and relieve fatigue and stress. Massage is a type of medical supplementary therapy that promotes blood circulation and relieves fatigue by rubbing, kneading, pushing, pulling, tapping, or moving the body using hands or special tools.

[0003] A massage device is a device that provides massage using a mechanical device, and a typical example of a massage device is a massage chair, which allows a user to receive a massage while sitting comfortably.

[0004] Massage chairs are equipped with various functions such as tapping, kneading, rolling, acupressure, reclining, and leg massage to relieve muscle tension and mental fatigue.

[0005] However, with existing massage chairs, the movement of the massage balls is not similar to that of a real masseuse, which means that the effectiveness of the massage is significantly reduced compared to that of a real masseuse.

[0006] In this regard, a massager is disclosed in Korean Patent Publication No. 10-0704351 as a prior patent document.

[0007] The above-mentioned prior patent document is configured to include a first arm to which a first massage head is attached, a second arm to which a second massage head is attached, a drive unit that rotates the first arm and the second arm so that the distance between the first massage head and the second massage head changes, and a pressure unit that generates a pressure in a direction that moves the massage head attached to either the first arm or the second arm forward.

[0008] However, in the above prior patent documents, the drive unit for rotating the first arm and the second arm requires a separate drive source such as an air pump, and the pressurizing unit for pressurizing the first arm or the second arm requires an expandable airbag, which results in an increase in overall manufacturing costs. Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention has been made to solve the problems of the conventional massage chairs as described above, and aims to provide a user sitting in a massage chair with the same sensation as if they were actually receiving a massage by embodying the movement of the kneading balls in the same way as an actual masseuse.

[0010] Another object of the present invention is to realize the same movements as an actual masseuse bending and spreading the thumb and remaining fingers when realizing the movements of the kneading balls for massaging the user's body. [Means for solving the problem]

[0011] The present invention has been made to solve the above-mentioned problems, and a massage chair according to an embodiment of the present invention may include (may include; may constitute; may be constructed; may be set; may include; may contain; may have); a first arm equipped with first massage balls, a second arm equipped with second massage balls and rotatably coupled to the first arm, and a connecting part that connects the first arm and the second arm and adjusts the separation distance between the first massage balls and the second massage balls while rotating eccentrically from the first arm.

[0012] A massage chair according to an embodiment of the present invention may further include a first shaft disposed on one side of the first arm and rotatably connecting the second arm to the first arm, a second shaft rotatably connecting one side of the connecting portion to the second arm, a third shaft disposed on the other side of the first arm, and an eccentric shaft to which the other side of the connecting portion is rotatably connected and which rotates eccentrically from the third shaft.

[0013] The first shaft may be disposed between the first massaging ball and the third shaft.

[0014] The second shaft may be disposed between the second massaging balls and the first shaft.

[0015] The distance from the third shaft to the first massaging ball may be greater than the distance from the third shaft to the second massaging ball.

[0016] The first shaft may be disposed between the second massaging ball and the second shaft.

[0017] The third shaft may be disposed between the first massaging ball and the first shaft.

[0018] The distance from the second shaft to the second massaging balls may be greater than the distance from the second shaft to the first massaging balls.

[0019] A massage chair according to an embodiment of the present invention may further include a first shaft disposed on one side of the first arm and rotatably connecting one side of the second arm to the first arm, a second shaft disposed on the other side of the second arm, a third shaft disposed on the other side of the first arm, a first eccentric shaft to which one side of the connecting portion is rotatably connected and rotates eccentrically from the second shaft, and a second eccentric shaft to which the other side of the connecting portion is rotatably connected and rotates eccentrically from the third shaft. [Effects of the Invention]

[0020] As described above, according to the massage chair of the present invention, the connecting part that rotates eccentrically from the first arm rotates the second arm relative to the first arm, which has the effect of making it possible to adjust the distance between the first arm and the second arm.

[0021] In addition, the present invention has the advantage that the distance between the first arm and the second arm can be adjusted depending on the structure of the connecting part, so that it can embody the same movements as an actual masseuse bending and spreading the thumb and remaining fingers.

[0022] The effects of the present invention are not limited to those mentioned, and other effects not mentioned will be clearly understood by those skilled in the art from the following description of the embodiments for carrying out the present invention. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a front view of a massage chair according to an embodiment of the present invention. [Figure 2] 3 is a diagram illustrating a drive device for a back massage unit according to an embodiment of the present invention. FIG. [Figure 3] 10A and 10B are diagrams illustrating how the massage balls according to the embodiment of the present invention move up and down and left and right. [Figure 4] 1 is a perspective view of a massage unit according to an embodiment of the present invention. [Figure 5] 1 is a side view of a massage unit according to an embodiment of the present invention. [Figure 6] FIG. 2 is an enlarged view of the massage unit according to the embodiment of the present invention. [Figure 7] FIG. 2 is an enlarged view of the massage unit according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0025] Since the present invention can be modified in various ways and can have various embodiments, specific embodiments are shown in the drawings and will be specifically described in the detailed description, but it is not intended to limit the present invention to the specific embodiments, and it should be construed as including all modifications, equivalents, and alternatives within the spirit and technical scope of the present invention.

[0026] FIG. 1 is a front view of a massage chair according to an embodiment of the present invention.

[0027] The massage chair 100 according to the embodiment of the present invention can directly provide mechanical stimulation to the body of a seated user by tapping, pushing, kneading, pulling, and moving the body depending on the operation mode. The massage chair 100 can massage one or more of the head, back, arms, buttocks, and legs of the seated user. Such a massage chair 100 can be installed indoors, such as at home.

[0028] The massage chair 100 may include a main body that is driven to provide a massage to a user. The main body is provided for the user's body to rest on and is composed of an upper section, a seat section, and a lower section according to the position where the body rests. That is, the main body is composed of an upper section that surrounds the user's head, a seat section on which the user can lean their upper body, and a lower section that surrounds the calves and feet, thereby providing the user with comfort and ease. In this case, the size and position of each section of the massage chair 100 can be manually or automatically changed according to the characteristics of the user's body.

[0029] The upper section may include a head massage section 101 that supports and massages the user's head. The seat section may include a back massage section 102 that supports and massages the user's back, an arm massage section 103 that supports and massages the user's arms, and a buttocks massage section 104 that supports and massages the user's buttocks. The lower section may include a leg massage section 105 that supports and massages the user's calves and feet.

[0030] The massage chair 100 may include a user interface unit 120. Here, the user interface unit 120 may include an operation unit 121 that receives input from a user and a display unit 122 that displays information related to the massage. As an example, the user interface unit 120 may be configured in the form of a touch screen in which the operation unit 121 and the display unit 122 are integrated.

[0031] FIG. 2 is a diagram showing a schematic diagram of a drive device for a back massage unit according to an embodiment of the present invention, and FIG. 3 is a diagram showing how the massage balls according to an embodiment of the present invention move up, down, left, and right.

[0032] A drive device (hereinafter referred to as "drive device") 1020 of the back massage portion 102 can control the movement of the massage unit 200, which will be described later.

[0033] The massage unit 200 may include kneading balls 211 and 221. The kneading balls 211 and 221 are configured to perform tapping and / or pushing and pulling (kneading) actions on the user's back, and may be arranged on the left and right sides, respectively.

[0034] The massage balls 211, 221 can be operated by receiving power generated by the rotation of a first motor 1021, which will be described later. In one embodiment, the left massage balls 211a, 221a and the right massage balls 211b, 221b are connected via a camshaft, and when the first motor 1021 rotates, the camshaft rotates, causing the left and right massage balls 211a, 211b, 221a, 221b to reciprocate left and right (horizontal axis movement) so as to repeatedly move toward and away from each other. In this case, the camshaft may represent a third shaft A3, which will be described later. Alternatively, the camshaft may be connected coaxially with the third shaft A3 and rotate together.

[0035] The left massage balls 211a, 221a and the right massage balls 211b, 221b may be rotatably coupled to the left arms 210a, 220a and the right arms 210b, 220b, respectively. The arms 210a, 210b, 220a, 220b are frames formed to extend in the vertical direction, and may be composed of the left arms 210a, 220a coupled to the left massage balls 211a, 221a and the right arms 210b, 220b coupled to the right massage balls 211b, 221b. The massage balls 211a, 211b, 221a, 221b may be rotatably coupled to the upper sides of the respective arms 210a, 210b, 220a, 220b. Also, a camshaft may be coupled to the lower sides of the left and right first arms 210a and 210b, thereby connecting the left and right first arms 210a and 210b to each other.

[0036] The drive device 1020 may further include a first motor 1021 .

[0037] As described above, the massaging balls 211, 221 can move in the left-right direction (x-axis direction in FIG. 3) by the rotational drive of the first motor 1021. For example, a gear unit consisting of a worm and a worm gear is provided between the first motor 1021 and the camshaft, and can play a role in transmitting the rotational power of the first motor 1021 to the camshaft. Specifically, the left massaging balls 211a, 221a and the right massaging balls 211b, 221b can repeatedly move away from and towards each other while moving in the left-right direction. As an example, one and / or two left massaging balls 211a, 221a and right massaging balls 211b, 221b may be provided.

[0038] The drive unit 1020 may further include a second motor 1022 .

[0039] The kneading balls 211, 221 can move up and down (the y-axis direction in FIG. 3) by the rotational drive of the second motor 1022. For example, the back massage unit 102 may have rails extending up and down on each of the left and right sides. In this case, a moving shaft may be provided that connects the rails laterally and moves up and down along the rails. The moving shaft may be directly or indirectly connected to the arms 210, 220 of the kneading balls 211, 221.

[0040] The moving shaft receives rotational power from the second motor 1022 and can move up and down, thereby allowing the massaging balls 211 and 221 to also move up and down.

[0041] A gear unit consisting of one or more gears may further be provided between the second motor 1022 and the movement shaft to change the magnitude and / or direction of power.

[0042] The drive device 1020 may further include a third motor 1023 .

[0043] The kneading balls 211, 221 can be moved in the front-to-back direction by the rotational drive of the third motor 1023. The third motor 1023 can move the arms 210, 220 on which the kneading balls 211, 221 are provided in the front-to-back direction, and thereby the kneading balls 211, 221 can also be moved in the front-to-back direction. Therefore, when the kneading balls 211, 221 are reciprocated in the front-to-back direction by the drive of the third motor 1023, a kneading force can be applied to the body of the user sitting in the massage chair 100.

[0044] A gear unit consisting of one or more gears for switching the magnitude and / or direction of power may be further provided between the third motor 1023 and the arms 210, 220. In a possible embodiment, the gear unit for moving the massage balls 211, 221 in the forward and backward directions may be configured to include a sector gear. However, this is just an example, and the form of the gear is not limited.

[0045] The drive device 1020 may further include a fourth motor 1024 .

[0046] The rotational drive of the fourth motor 1024 allows the massage balls 211, 221 to rapidly reciprocate in the front-to-back direction. The fourth motor 1024 can reciprocate the arms 210, 220 of the massage balls 211, 221 in the front-to-back direction, thereby allowing the massage balls 211, 221 to also move in the front-to-back direction. In other words, when the massage balls 211, 221 reciprocate in the front-to-back direction due to the drive of the fourth motor 1024, a tapping force can be applied to the body of the user sitting in the massage chair 100.

[0047] A gear unit consisting of one or more gears may be further provided between the fourth motor 1024 and the arms 210, 220 to switch the magnitude and / or direction of power. In a possible embodiment, the gear unit for moving the massage balls 211, 221 in the forward and backward directions may be configured to include a chain or a pulley and a belt. However, this is just an example, and the form of the gear unit is not limited.

[0048] The driving device 1020 may further include a control unit (not shown).

[0049] The control unit is configured to control the operation of one or more motors included in the driving device 1020, and can control the operation of each motor based on preset data.

[0050] In addition, after the operation of the massage chair 100 is started, the control unit controls the operation of the first to fourth motors 1021, 1022, 1023, and 1024 for a predetermined time, and can move the massage balls 211 and 221 up and down, left and right, and / or back and forth.

[0051] Figure 4 is a diagram showing an oblique view of a massage unit according to an embodiment of the present invention, Figure 5 is a diagram showing a side view of a massage unit according to an embodiment of the present invention, and Figures 6 and 7 are diagrams showing enlarged views of a massage unit according to an embodiment of the present invention.

[0052] Hereinafter, a massage unit of a massage chair according to an embodiment of the present invention will be described with reference to FIGS.

[0053] The massage chair 100 according to an embodiment of the present invention may include a massage unit 200. The massage unit 200 is configured to perform tapping and / or pushing and pulling (kneading) actions on the user's back, and may include a first arm 210, a second arm 220, and a connecting part 230.

[0054] The first arm 210 may be provided with a first massaging ball 211. The first arm 210 can be operated by receiving power generated by the rotation of a first motor 1021, which will be described later.

[0055] In one embodiment, the first arm 210 may include a left first arm 210a and a right first arm 210b. A left first massaging ball 211a may be provided above the left first arm 210a, and a right first massaging ball 211b may be provided above the right first arm 210b. The left first arm 210a and the right first arm 210b may be connected by a camshaft. The first arms 210a and 210b may be rotatably coupled to the camshaft or may be fixed to the camshaft. In this case, the camshaft may represent a third axis A3 (described below), and the camshaft and the third axis A3 may be coaxially connected and rotate together. When the first motor 1021 rotates, the camshaft rotates, causing the left first arm 210a and the right first arm 210b to reciprocate left and right (horizontal axis movement) so as to repeatedly approach and move away from each other.

[0056] The first arm 210 may be coupled to a support unit 250. The support unit 250 may include a connecting link 251 and a fixing member 253. A lower side of the first arm 210 may be coupled to the connecting link 251. The connecting link 251 can support the movement of the first arm 210 when the first motor 1021 is driven and the first arm 210 swings left and right. A lower end of the connecting link 251 may be spherical. The lower end of the connecting link 251 may be fitted into a connecting member 252 provided at the lower end of the first arm 210. An upper end of the connecting link 251 may be rotatably coupled to the fixing member 253. Therefore, the fixing member 253 can be fixed even when the first arm 210 swings left and right by the first motor 1021.

[0057] The second arm 220 may be rotatably coupled to the first arm 210. The second arm 220 may be rotatably coupled to the first arm 210 via a first axis A1. The second arm 220 may be provided with second massaging balls 221.

[0058] In one embodiment, the second arm 220 may include a left second arm 220a and a right second arm 220b. The left second arm 220a may be rotatably coupled to the left first arm 210a, and the right second arm 220b may be rotatably coupled to the right first arm 210b. A left second massaging ball 221a may be provided on an upper side of the left second arm 220a, and a right second massaging ball 221b may be provided on the right second arm 220b.

[0059] The connecting part 230 can connect the first arm 210 and the second arm 220. The connecting part 230 can adjust the distance between the first massaging ball 211 and the second massaging ball 221 while rotating eccentrically from the first arm 210.

[0060] In one embodiment, one side of the coupling portion 230 may be rotatably coupled to the second axis A2, and the other side of the coupling portion 230 may be rotatably coupled to the eccentric axis EA, which may be rotated eccentrically from the third axis A3.

[0061] The rotating part 240 may be rotatably coupled to the first arm 210. The rotating part 240 may be rotatably coupled around a third axis A3.

[0062] The eccentric shaft EA may be coupled to the rotating unit 240. The eccentric shaft EA may be fixed to the rotating unit 240 while being parallel to the third axis A3. The eccentric shaft EA may be rotatably inserted into a groove 240a formed in the rotating unit 240 while being parallel to the third axis A3. The eccentric shaft EA can revolve around the third axis A3 while coupled to the rotating unit 240. As the rotating unit 240 rotates around the third axis A3, the eccentric shaft EA can rotate eccentrically from the third axis A3. Therefore, the connecting unit 230 can rotate eccentrically from the third axis A3 while rotating around the eccentric shaft EA.

[0063] When the connecting portion 230 rotates eccentrically from the third axis A3, the second arm 220 can rotate about the first axis A1. Therefore, by changing the angle θ between the first arm 210 and the second arm 220, the separation distance between the first arm 210 and the second arm 220 can be adjusted.

[0064] Hereinafter, the plurality of shafts that connect the first arm 210, the second arm 220, and the connecting portion 230 in the massage chair according to the embodiment of the present invention will be specifically described.

[0065] The axes of the massage chair according to the embodiment of the present invention may be composed of a first axis A1, a second axis A2, a third axis A3, and an eccentric axis EA. The first axis A1, the second axis A2, the third axis A3, and the eccentric axis EA may be arranged parallel to each other.

[0066] The first axis A1 may be disposed on one side of the first arm 210. The first axis A1 may rotatably connect one side of the second arm 220 to the first arm 210.

[0067] The second axis A2 may be disposed on the other side of the second arm 220. The second axis A2 may rotatably connect one side of the connecting portion 230 to the second arm 220.

[0068] The third axis A3 may be disposed on the other side of the first arm 210. The third axis A3 may be connected to a camshaft that transmits power so that the first arm 210 rotates or moves left and right. Alternatively, the third axis A3 may represent a part of the camshaft.

[0069] The eccentric shaft EA may be disposed on the other side of the connecting portion 230. The eccentric shaft EA can rotatably connect the other side of the connecting portion 230 to the first arm 210. The eccentric shaft EA can rotate eccentrically from the third axis A3. Therefore, when the eccentric shaft EA rotates eccentrically from the third axis A3, the connecting portion 230 can rotate eccentrically from the third axis A3.

[0070] For example, the second axis A2 may rotatably connect the connecting part 230 to the second arm 220. The connecting part 230 may be rotatably coupled to the second arm 220 around the second axis A2. Therefore, one side of the connecting part 230 may rotate around the second axis A2, and the other side of the connecting part 230 may rotate eccentrically from the third axis A3 while rotating around the eccentric axis EA.

[0071] However, in another example, the connecting portion 230 may rotate eccentrically from the second axis A2 and the third axis A3. That is, a rotation axis (hereinafter referred to as a "first eccentric axis") connecting the second arm 220 and the connecting portion 230 may be disposed eccentrically from the second axis A2, and a rotation axis (hereinafter referred to as a "second eccentric axis") connecting the first arm 210 and the connecting portion 230 may be disposed eccentrically from the third axis A3. Furthermore, one side of the connecting portion 230 may be rotatably coupled to the first eccentric axis, and the other side of the connecting portion 230 may be rotatably coupled to the second eccentric axis. Therefore, one side of the connecting portion 230 may rotate eccentrically from the second axis A2 while rotating about the first eccentric axis, and the other side of the connecting portion 230 may rotate eccentrically from the third axis A3 while rotating about the second eccentric axis.

[0072] Meanwhile, in the massage chair according to the embodiment of the present invention, one side of the second arm 220 is rotatably coupled to the center of the first arm 210, so that the connecting part 230 is rotatably coupled around the second axis A2 and can rotate eccentrically from the third axis A3. Therefore, the positional relationship between the massage balls 211, 221 and the multiple axes A1, A2, A3, EA is as shown in FIG.

[0073] That is, as an example, the first axis A1 may be disposed between the first massage ball 211 and the third axis A3. Also, the second axis A2 may be disposed between the second massage ball 221 and the first axis A1. Also, the distance from the third axis A3 to the first massage ball 211 may be greater than the distance from the third axis A3 to the second massage ball 221. Also, referring to FIG. 5, an imaginary line connecting the center of the first massage ball 211 and the center of the third axis A3 can pass through the center of the first axis A1. Also, an imaginary line connecting the center of the second massage ball 221 and the center of the first axis A1 can pass through the center of the second axis A2.

[0074] However, in a massage chair according to another embodiment of the present invention, one side of the first arm 210 may be connected to the center of the second arm 220 .

[0075] That is, as another example, the first axis A1 may be disposed between the second massage ball 221 and the second axis A2. Furthermore, the third axis A3 may be disposed between the first massage ball 211 and the first axis A1. Furthermore, the distance from the second axis A2 to the second massage ball 221 may be greater than the distance from the second axis A2 to the first massage ball 211. Furthermore, an imaginary line connecting the center of the second massage ball 221 and the center of the second axis A2 can pass through the center of the first axis A1. Furthermore, an imaginary line connecting the center of the first massage ball 211 and the first axis A1 can pass through the center of the third axis A3.

[0076] Those skilled in the art will recognize that any flowcharts, flow diagrams, state transition diagrams, pseudocode, and the like shown in the present invention may be substantially embodied in a computer-readable medium and represent various processes executable by such a computer or processor, whether or not a computer or processor is explicitly shown.

[0077] Therefore, the above-described embodiments of the present disclosure can be created as a computer-executable program and can be embodied in a general-purpose digital computer that runs the program using a computer-readable recording medium. The computer-readable recording medium may include a magnetic recording medium (e.g., a ROM, a floppy disk, a hard disk, etc.), an optically readable medium (e.g., a CD-ROM, a DVD, etc.), or the like.

[0078] The functions of the various elements shown in the figures may be provided through the use of dedicated hardware as well as hardware capable of executing software in association with appropriate software. When provided by a processor, such functions may be provided by a single dedicated processor, by a single shared processor, or by a plurality of individual processors, some of which may be shared.

[0079] Additionally, explicit use of the terms "processor" or "controller" should not be construed to refer exclusively to hardware capable of executing software, but may implicitly include, without limitation, digital signal processor (DSP) hardware, read-only memory (ROM), random access memory (RAM) for storing software, and non-volatile storage.

[0080] Although specific embodiments of the present invention have been described and illustrated above, the present invention is not limited to the described embodiments, and those skilled in the art will understand that various modifications and variations can be made to other specific embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be determined not by the described embodiments but by the technical ideas set forth in the claims.

[0081] [Claims at the time of international application] [Claim 1] A massage chair, a first arm provided with a first kneading ball; a second arm provided with a second massaging ball and rotatably coupled to the first arm; a connecting part that connects the first arm and the second arm and rotates eccentrically from the first arm to adjust the distance between the first massage balls and the second massage balls. [Claim 2] a first shaft disposed on one side of the first arm and rotatably connecting the second arm to the first arm; a second shaft rotatably connecting one side of the connecting portion to the second arm; a third shaft disposed on the other side of the first arm; The massage chair according to claim 1, further comprising: an eccentric shaft rotatably coupled to the other side of the connecting portion and rotating eccentrically from the third shaft. [Claim 3] 3. The massage chair according to claim 2, wherein the first shaft is disposed between the first massage ball and the third shaft. [Claim 4] 3. The massage chair according to claim 2, wherein the second shaft is disposed between the second massage balls and the first shaft. [Claim 5] 3. The massage chair according to claim 2, wherein the distance from the third axis to the first massage ball is greater than the distance from the third axis to the second massage ball. [Claim 6] 3. The massage chair according to claim 2, wherein the first shaft is disposed between the second massage ball and the second shaft. [Claim 7] 3. The massage chair according to claim 2, wherein the third axis is disposed between the first massage ball and the first axis. [Claim 8] 3. The massage chair according to claim 2, wherein the distance from the second axis to the second massage balls is greater than the distance from the second axis to the first massage balls. [Claim 9] a first shaft disposed on one side of the first arm and rotatably connecting one side of the second arm to the first arm; a second shaft disposed on the other side of the second arm; a third shaft disposed on the other side of the first arm; a first eccentric shaft rotatably coupled to one side of the connecting portion and rotating eccentrically from the second shaft; The massage chair according to claim 1, further comprising: a second eccentric shaft rotatably connected to the other side of the connecting portion and rotating eccentrically from the third shaft.

Claims

1. A massage chair, a first arm provided with a first kneading ball; a second arm provided with a second massaging ball and rotatably coupled to the first arm; a connecting part that connects the first arm and the second arm and adjusts the separation distance between the first massage balls and the second massage balls while rotating eccentrically from the first arm.

2. a first shaft disposed on one side of the first arm and rotatably connecting the second arm to the first arm; a second shaft that rotatably couples one side of the connecting portion to the second arm; a third shaft disposed on the other side of the first arm; The massage chair according to claim 1, further comprising: an eccentric shaft rotatably coupled to the other side of the connecting portion and rotating eccentrically from the third shaft.

3. The massage chair according to claim 2, wherein the first shaft is disposed between the first massage ball and the third shaft.

4. The massage chair according to claim 2, wherein the second shaft is disposed between the second massage balls and the first shaft.

5. The massage chair according to claim 2, wherein the distance from the third axis to the first massage ball is greater than the distance from the third axis to the second massage ball.

6. The massage chair according to claim 2, wherein the first shaft is disposed between the second massage ball and the second shaft.

7. The massage chair according to claim 2, wherein the third axis is disposed between the first massage ball and the first axis.

8. The massage chair according to claim 2, wherein the distance from the second axis to the second massage balls is greater than the distance from the second axis to the first massage balls.

9. a first shaft disposed on one side of the first arm and rotatably connecting one side of the second arm to the first arm; a second shaft disposed on the other side of the second arm; a third shaft disposed on the other side of the first arm; a first eccentric shaft rotatably coupled to one side of the connecting portion and rotating eccentrically from the second shaft; The massage chair according to claim 1, further comprising: a second eccentric shaft rotatably coupled to the other side of the connecting portion and rotating eccentrically from the third shaft.

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