CN215021930U

CN215021930U - Massage ball assembly of massage chair and massage chair

Info

Publication number: CN215021930U
Application number: CN202021030764.2U
Authority: CN
Inventors: 朴京焕; 裵秉灿; 成演秀
Original assignee: Kaweiyi Co ltd
Current assignee: Kaweiyi Co ltd; Coway Co Ltd
Priority date: 2019-06-07
Filing date: 2020-06-08
Publication date: 2021-12-07
Anticipated expiration: 2030-06-08
Also published as: KR20200140593A

Abstract

The utility model provides a massage ball subassembly and massage armchair of massage armchair. The massage ball assembly of the massage chair according to the embodiment of the present application may include: a massage block 650 mounted inside the backrest part 100 of the massage chair; a main frame (610) provided on the massage block (650) and having a first massage ball (614) mounted thereon; and a shoulder massage module (630) having a predetermined curvature and moving along a curved path corresponding to the predetermined curvature.

Description

Massage ball assembly of massage chair and massage chair

Technical Field

The present invention relates to a massage ball assembly of a massage chair capable of massaging a portion above the shoulder and a massage chair having the massage ball assembly mounted thereon.

Background

Many people receive massage in order to relieve physical stiffness caused by stress, a phenomenon of muscle mass caused by lack of exercise, and the like. However, since the massage provided by a professional masseur cannot be received for various reasons, massage chairs purchased at home for convenient use have been developed and used.

The existing massage chair performs a massage operation by moving a massage mass block installed at the inner side of a backrest up and down and left and right, a main frame is installed at each of both side surfaces of the massage mass block, and massage balls are installed at both ends of the main frame.

However, since the massage ball rotates in a state of being fixed to the main frame, it is difficult to provide the most comfortable massage in accordance with the flexion of the user's body even if the massage bolus moves up and down and left and right.

In particular, there is often a problem that the massage balls cannot properly massage the portion above the shoulders. The conventional massage chair which cannot sufficiently massage the portion above the shoulders is problematic in that it cannot satisfy the needs of modern people who often have pain symptoms in the portion above the shoulders.

Documents of the prior art

Patent document

Korean laid-open patent publication No. 10-2018-;

japanese registered patent document No. 4015442 (2007.09.21);

japanese registered patent document No. 3525045 (2004.02.20).

SUMMERY OF THE UTILITY MODEL

The present application is proposed to solve the above problems.

Specifically, it is an object of the present application to provide a massage chair which includes a main frame mounted with first massage balls for massaging a back of a user and additionally provided shoulder massage modules, and which can massage a portion above shoulders of the user by sliding of the shoulder massage modules.

To this end, one embodiment of the present application provides a massage ball assembly of a massage chair, comprising: the massage ball is arranged inside the backrest part of the massage chair; the main frame is arranged on the massage block, and a first massage ball is arranged on the main frame; and a shoulder massage module having a predetermined curvature and moving along a curved path corresponding to the predetermined curvature.

In one embodiment, the shoulder massage module may include one or more sliding frames having a predetermined curvature and mounted on the main frame, and a shoulder massage part mounted at one end of the one or more sliding frames.

In one embodiment, a power transmission unit formed with a plurality of first protrusions along a circumferential direction of a side surface and a driving motor providing power for rotating the power transmission unit are mounted on the main frame, and a plurality of slide frame protrusions engaged with the plurality of first protrusions along the predetermined curvature may be formed on an outer side of one of the one or more slide frames.

In one embodiment, the main frame is capable of pivotal movement relative to the massage mass and the one or more gliding frames are capable of gliding movement relative to the main frame along the curved path.

In one embodiment, the slope of a tangent to a curve along which the curved path follows may decrease towards the backrest portion.

In one embodiment, the massage block is capable of moving up and down inside the backrest portion, and the one or more sliding frames are capable of sliding movement in a first direction toward the backrest portion within a predetermined range of a movable range of the up-and-down movement of the massage block, and may perform sliding movement in a second direction opposite to the first direction within a range of the movable range other than the predetermined range.

In one embodiment, the predetermined range may be determined based on a shoulder positioning module that detects shoulder positions of a user of the massage chair.

In one embodiment, further comprising a tilting frame provided to be capable of a pivotal motion with respect to the main frame, and one or more of a second massage ball and a warming ball separated from the first massage ball mounted on the main frame may be mounted on the tilting frame.

Further, the present application provides a massage chair including the massage ball assembly, comprising: a seat portion; a backrest part rotatably fixed to one side of the seat part; a leg fixing part rotatably fixed to the other side of the seat part; a support frame for fixing the seat portion; a massage ball assembly mounted to the backrest portion and capable of one or more of up-and-down movement and side-to-side movement by the massage mass; and an operation part for adjusting the rotation of the backrest part, the rotation of the leg fixing part and the up-and-down movement or the left-and-right movement of the massage ball assembly.

The present application as described above has the following effects.

First, the existing massage chair only massages by moving the massage ball assembly up and down and left and right, so that there is a deficiency in massaging the parts above the shoulders, and the utility model can massage the parts above the shoulders through the shoulder massage module, so that the whole shoulders can be massaged.

Second, the shoulder massage module may be driven separately from the module massaging the back of the user, thereby performing a concentrated massage of the shoulders.

Third, the shoulder massage module may be driven together with the module for massaging the back, thereby performing massage of the shoulders and the back.

Fourth, when it is not necessary to massage the shoulders, it can be installed inside the backrest without affecting the movement of the module for massaging the back, so that the back massage can be smoothly performed by the module for massaging the back.

Fifth, the shoulder massage part for massaging the shoulders has a shape most suitable for shoulder massage, and thus more effective massage can be performed.

Drawings

Fig. 1 is an overall perspective view of a massage chair according to an embodiment of the present application.

Fig. 2 is a perspective view illustrating an air bag of the massage chair of fig. 1.

Fig. 3 is an overall perspective view for explaining a massage ball assembly according to an embodiment of the present application.

Fig. 4 is a perspective view illustrating a main frame of the massage ball assembly of fig. 3 in more detail.

Fig. 5 is a perspective view more particularly illustrating the shoulder massage module of the massage ball assembly of fig. 3.

Fig. 6 is a side view of a massage chair fitted with a massage ball assembly according to embodiments of the present application.

Detailed Description

Hereinafter, the present application will be described in detail with reference to the accompanying drawings.

In the following, in fig. 1 and 2, assuming that the user sits on the massage chair, the upper side of the user is the upper side, the lower side is the lower side, the front side facing the user is the backrest side, and the rear side is the outer side.

On the other hand, the backrest portion 100, the leg fixing portion 300, and the foot fixing portion 310, which will be described later, are capable of performing a rotational movement or a vertical movement, respectively, and thus a separate actuator (not shown) is provided, but since the actuator is a known technique, a detailed description of the operation principle thereof will be omitted.

Further, when the mode is selected or changed by the operation part 500 described later and the massage chair is operated accordingly, after a signal is applied to the operation part 500, the signal should be transmitted by the control part (not shown) to complete the operation, however, the control part is also a known technology, and thus a detailed description of the operation principle thereof is omitted.

Referring to fig. 1 and 2, a massage chair according to an embodiment of the present application is explained.

The massage chair includes a backrest part 100, a seat part 200, a leg fixing part 300, a support frame 400, and an operating part 500, and further includes a massage ball assembly 600 according to an embodiment of the present application.

The backrest portion 100 is a portion supporting the back of a user, which is adjustable at a predetermined angle with respect to the support frame 400 and the seat portion 200 fixed on the ground.

A movable massage ball assembly 600 is installed at the center of the backrest 100.

The massage ball assembly 600 is a structure including a plurality of massage balls and warm balls, and can move up and down and left and right along a predetermined track inside the backrest part 100.

In addition, the massage ball can move forward and backward, and the user's shoulder height can be sensed accordingly. For example, when the massage ball assembly 600 moves upward from the lowermost portion, the massage ball meets the back of the user and moves backward from the reference position, and when the massage ball stops moving backward and returns to the reference position, the body of the user does not exist in the portion, and thus the height of the shoulder can be determined.

In addition, the massage ball assembly 600 moves along a predetermined track inside the backrest portion 100 while performing a massage operation, so that the plurality of massage balls press the user's back to the shoulders to provide a massage feeling. At this time, a plurality of massage balls protrude from the seat of the backrest part 100 to provide a massage feeling by pressing the back of the user to the shoulders, and for this reason, the seat may be made using a material having a predetermined elasticity.

The inside of the warming ball is provided with a hot wire, so that a user can be provided with a warming sensation by the heat generated by the hot wire.

The upper portion of the backrest portion 100 has a headrest 110 that contacts the head of the user.

Preferably, the headrest 110 is made of a material capable of providing elasticity, and in other embodiments, a separate air bag may be provided inside the headrest 110.

A pair of shoulder fixing portions 120 are attached to both left and right sides of a headrest 110 of the backrest portion 100, and shoulder airbags 129 are attached to the shoulder fixing portions 120, respectively.

The pressure and the amount of air applied to various airbags described later including the shoulder airbags 129 can be adjusted.

The air only needs to not strongly press the pressure and the air amount of the human body to correct the body position of the user, and the air injected for this purpose will be referred to as "air for fixation" hereinafter.

Further, in order to perform the massage operation, the air cells need a pressure and an air amount larger than that of air for fixation, and the air injected for this purpose will be hereinafter referred to as "air for massage".

The seat portion 200 is a portion that contacts the buttocks and the upper thighs of the user, and is generally fixed to the support frame 400. Preferably, the seat portion 200 is made of a material capable of providing elasticity.

In the portion where the seat portion 200 and the support frame 400 are located, there are pelvic airbags 209 on both sides of the inner side facing the user, respectively.

One pelvic bladder 209 may be constituted by a pair of upper and lower bladders, respectively. In this case, the upper pelvis airbag 209 may also be called a lumbar airbag because it can press the lumbar region.

The leg fixing portion 300 is a portion to which the leg of the user is fixed, and as shown in fig. 2, a pair of grooves are provided in the leg fixing portion 300 to enable insertion of the lower leg of the user. The leg fixing part 300 may be adjusted at a predetermined angle with respect to the fixed support frame 400 and the seat part 200.

A leg airbag 309 is provided in the recess of the leg fixing portion 300.

Referring to fig. 2, in the embodiment of the present application, a pair of left and right airbags may be respectively constituted by a pair of upper and lower airbags, and thus one leg airbag 309 is constituted by a total of 4 airbags. Alternatively, one leg airbag 309 may be constituted by a pair of airbags on the left and right sides, respectively.

The foot fixing part 310 is a part for fixing the foot on which the user is placed when performing a massage operation, and a recess is provided in the foot fixing part 310 to enable insertion of the user's foot.

In an embodiment of the present application, the foot fixing part 310 may be integrally formed with the leg fixing part 300. Alternatively, the foot fixing portion 310 can move up and down with respect to the leg fixing portion 300, and thus can be appropriately adjusted according to the body size of the user (the length of the leg or the lower leg, etc.).

A foot airbag 319 is provided in the recess of the foot fixing part 310.

Referring to fig. 2, in the embodiment of the present application, a pair of left and right airbags may be respectively constituted by a pair of upper and lower airbags, and thus one foot airbag 319 is constituted by a total of 4 airbags. Alternatively, one foot bladder 319 may be constituted by a pair of left and right side bladders, respectively.

The supporting frames 400 are positioned at both left and right sides of the seat portion 200, and can firmly fix the entire massage chair also during the operation of the backrest portion 100 and the leg fixing portion 300 and the operation of the foot fixing portion 310. For this, the bottom of the support frame 400 may have a bracket to enable the massage chair to be fixed on the ground.

The upper end of the support frame 400 has an arm fixing portion 410.

The arm fixing part 410 is a part for fixing an arm on which a user places during a massage operation, and a groove (see fig. 1) is provided in the arm fixing part 410 to enable insertion of the user's hand.

The arm fixing portion 410 has an arm airbag 419 in a recess.

In the embodiment of the present application, the pair of upper and lower airbags are respectively constituted by the pair of left and right airbags, and thus one arm airbag 419 is constituted by a total of 4 airbags. Alternatively, one arm airbag 419 may be formed of a pair of airbags on both upper and lower sides, respectively.

The operation part 500 is a part for the user to operate the massage chair, and the operation part 500 may be composed of buttons and a touch panel.

In the embodiment of the present application, the operating part 500 is provided at the right side of the massage chair to be operable with the right hand, and alternatively, the operating part 500 may be installed at the left side to be operable with the left hand.

Preferably, the operating part 500 and the massage chair are connected by a material which is hard and can change shape to some extent, and a cable connecting the operating part 500 and a control part (not shown) inside the massage chair may be installed inside thereof.

The user can select various modes through the operating part 500 and apply signals thereof to the control part (not shown), whereby the operating part 500 transmits signals corresponding to the respective modes to the control part (not shown).

The control part may control the operation of an actuator (not shown) or the like by a signal applied to the control part to operate the backrest part 100, the leg fixing part 300, the foot fixing part 310 to change the angle of each part, or to control the operation of various air bags and the massage ball assembly 600.

Hereinafter, the massage ball assembly 600 according to an embodiment of the present application will be described in detail with reference to fig. 3 to 5.

Referring to fig. 3, a massage ball assembly 600 according to the present application may include a main frame 610, an inclined frame 620, and a shoulder massage module 630.

A massage ball assembly 600 includes two main frames 610 to be installed one on each side of the massage mass 650 installed at the backrest part 100, and the main frames 610 can be moved according to the up and down and left and right movements of the massage mass 650.

For mounting on the massage mass 650, a first mounting hole 611 may be formed at the center of the main frame 610. Through the first mounting hole 611 of the main frame 610, it is possible to directly couple to the massage mass 650, however, in the direct coupling, since the main frame 610 is fixed to the massage mass 650, it is impossible to provide a massage feeling reflecting the flexion of the user's shoulders, back, waist, and hips, both sides of the massage mass 650 are respectively mounted with rotation fixing parts (not shown) rotatably fixed with respect to the coupling part with the main frame 610, and the first mounting hole 611 of the main frame 610 may be fixedly mounted on the rotation fixing parts (not shown), so that the mounting mass 650 can move only in the up-down direction, and the main frame 610 performs a pivoting motion from the mounting position, so that it is possible to provide the user with a massage feeling reflecting the flexion of the user's shoulders, back, waist, and hips.

The main frame 610 includes a first extension 612 extending from the first mounting hole 611 toward the backrest portion 100, and a second extension 613 extending from the first mounting hole 611 toward the bottom.

In addition, a power transmission unit 615 and a driving motor 616 may be further mounted on the main frame 610.

The power transmission unit 615 may be provided in a disk shape, and a plurality of first protrusions 615a may be formed along a circumferential direction of a side surface of the power transmission unit 615.

The driving motor 616 is installed to face the power transmission unit 615 with the main frame 610 therebetween, and the driving motor 616 provides power to rotate the power transmission unit 615. For example, the drive motor 616 may be a rotary motor, and may be any drive motor that provides power to rotate the power transfer unit 615.

The inclined frame 620 is a portion pivotably installed at an end of the second extension 613 of the main frame 610, and the inclined frame 620 is installed with a second massage ball 621 and a warming ball 622.

The inclined frame 620 is installed to be pivotally moved with respect to the main frame 610, and is a portion that provides an optimal massage feeling reflecting the flexion of the shoulder, back, waist and hip of the user.

Specifically, the tilting frame 620 may be installed at the second extension part 613 of the main frame 610 according to the embodiment shown in fig. 4, but it is sufficient that one is installed at the end of the first extension part 612 of the main frame 610 or at the ends of the first extension part 612 and the second extension part 613, respectively, according to other embodiments. The end of the main frame 610 where the inclined frame 620 is not installed may be installed with the first massage ball 614. Hereinafter, an embodiment when the tilting frame 620 is installed at the second extension 613 will be exemplified with reference to fig. 4.

The inclined frame 620 is centrally formed with a second mounting hole 623 for mounting to the main frame 610. A third mounting hole (not shown) may be formed on the main frame 610 at a portion corresponding to the second mounting hole 623.

The inclined frame 620 includes a first inclined frame 624 extending from the second mounting hole 623 toward the backrest portion 100 and a second inclined frame 625 extending from the second mounting hole 623 toward the bottom.

The warm ball 622 is rotatably installed at the end of the first inclined frame 624, and the second massage ball 621 is rotatably installed at the end of the second inclined frame 625.

The rotation of the warm ball 622 and the second massage ball 621 is different from the pivotal movement of the inclined frame 620, the inclined frame 620 performs the pivotal movement of a predetermined angle with respect to the main frame 610 with the second mounting hole 623 as a rotation axis, and the warm ball 622 and the second massage ball 621 are fixed at the mounting position of the inclined frame 620 to be rotatable only.

That is, since the inclined frame 620 performs the pivotal motion with respect to the main frame 610 using the second mounting hole 623 as a rotation axis, it is possible to provide an optimum massage suitable for the user's flexion, as compared to the related art in which the thermo-ball and the massage ball are mounted only on the main frame and move up and down and left and right.

The warm ball 622 is positioned closer to the first mounting hole 611 of the main frame 610, and thus the second massage ball 621 is positioned outside the inclined frame 620. That is, the massage feeling of the second massage ball 621 can be provided through a longer path than when mounted inside.

The tilting frame 620 may be connected to the main frame 610 by an elastic member 640.

The elastic member 640 provides a restoring force to the tilting frame 620 rotating around the main frame 610 by its own elastic force. Accordingly, the tilting frame 620 may also return to the initial position by the elastic member 640 while rotating according to the flexion of the user.

Referring to fig. 3 and 5, the shoulder massage module 630 will be described in more detail.

Similar to the main frame 610, two shoulder massage modules 630 may be provided on one massage ball assembly 600 to be installed one at each side end of the massage mass 650 installed on the backrest part 100, and the shoulder massage modules 630 may be moved according to the up-down and left-right movement of the massage mass 650.

The shoulder massage module 630 includes a first sliding frame 631, a second sliding frame 632, and a shoulder massage part 633.

To be mounted to the massage block 650, one sides of the first and second slide frames 631 and 632, respectively, may be formed with fourth mounting holes (not shown). The first and second slide frames 631 and 632 may be connected to each other through a fourth mounting hole (not shown), and may be mounted to the massage mass 650. More specifically, the first and second sliding

frames

631 and 632 may be mounted to the main frame 610 through fourth mounting holes (not shown), and the main frame 610 is mounted on the massage block 650, so that the mounting operation to the massage block 650 may be completed. Since the first and second sliding

frames

631 and 632 are provided separately from the main frame 610, a shoulder massage operation can be independently performed by the shoulder massage parts 633 mounted on the first and second sliding

frames

631 and 632 regardless of the operation of the main frame 610.

The first and second slide frames 631 and 632 may be provided in a curved form to have a predetermined curvature.

Specifically, the first and second sliding

frames

631 and 632 extend toward the backrest portion 100, and may be in a form in which a tangential slope thereof is reduced.

An outer side of one or more of the first and second sliding

frames

631 and 632 may be formed with a corresponding plurality of first and second sliding

frame protrusions

631a and 632a along the predetermined curvature. The plurality of first and second sliding

frame protrusions

631a and 632a can be engaged with the plurality of first protrusions 615a of the power transmission part 615, and the first and second sliding

frames

631 and 632 can perform sliding motion with respect to the main frame 610 by rotation of the power transmission part 615.

More specifically, the first and second sliding

frames

631 and 632 may slide on the main frame 610 along a curved path corresponding to their own curvature, and a tangential slope of a curve along which the curved path is formed may be decreased toward the backrest portion 100. Since the slope of the tangent line of the curved path toward the backrest part 100 is reduced, the shoulder massage part 633 installed at the front end can massage the portion above the shoulders of the massage chair user even though the first and second sliding

frames

631 and 632 perform sliding motion with respect to the main frame 610, not rotational motion.

In other words, the shoulder massage part 633 will perform pressing to provide a massage feeling in such a manner as to move the massage shoulder above part along a curved path at an upper rear position thereof with the shoulder above part of the massage chair user as a reference.

The shoulder massage unit 633 is mounted on the front ends of the first and second slide frames 631 and 632 facing the backrest 100, and is a part that provides a massage feeling by contacting the body of the user. The massage ball providing the massage feeling and the warming ball providing the warming feeling have a disk shape, so the massage bolus 650 provides the massage feeling generated by the rotation motion of the massage ball or the warming ball itself by moving up and down and left and right, and the shoulder massage part 633 provides the massage feeling by the sliding motion with respect to the main frame 610, not by the rotation motion of itself, so that the surface contacting the user preferably includes a rounded processed curved surface. And preferably has an area capable of sufficiently covering the portion above the shoulders of the user.

Hereinafter, referring to fig. 6, the operation steps of the massage ball assembly 600 according to the embodiment of the present application will be described in more detail.

Basically, the massage ball 650 of the massage ball assembly 600 is installed inside the backrest part 100 to move up and down and left and right, and a massage feeling or a warming feeling can be provided to the user by the massage balls and the warming balls installed on the main frame 610 and the rotating frame 620 of the massage ball 650.

The main frame 610 may perform a pivotal motion with respect to the massage mass 650, and the inclined frame 620 mounted on the main frame 610 may perform a pivotal motion with respect to the main frame 610.

Accordingly, as the massage bolus 650 moves up, down, left, and right, the first massage ball 614 mounted on the main frame 610, the second massage ball 621 mounted on the inclined frame 620, and the warm ball 622 may rotate along the back curvature of the user to provide a massage feeling to the user.

The massage ball assembly according to the embodiment of the present application further includes a shoulder massage module 630, so that a massage according to the portion above the shoulders of the shoulder massage module 630 can be further performed (fig. 6).

The shoulder massage module 630 may perform a sliding motion between a first position protruding from the seat of the backrest part 100 where the shoulder massage parts 633 press the above-shoulders parts by contacting the above-shoulders parts of the user to make the user feel a massage feeling and a second position where the shoulder massage parts 633 are mounted inside the backrest part 100 to make the user not feel the massage feeling, which are installed inside the backrest part 100, and do not protrude from the seat of the backrest part 100.

Since the shoulder massage parts 633 are used to massage the above-shoulder portions, it is preferable to move toward the first position only at a predetermined position of the massage mass 650. In other words, it is preferable that the shoulder massage parts 633 contact the above-shoulder portions of the user when the shoulder massage module 630 is located at the first position, which means that, in the up-and-down movement movable range of the massage mass 650, it is preferable to perform a sliding movement toward the first direction in which the backrest part 100 is located only within a predetermined range to contact the above-shoulder portions of the user, and to perform a sliding movement toward the second direction opposite to the first direction within a range outside the predetermined range to re-hit the inside of the backrest part 100.

Wherein the predetermined range is determined based on the shoulder position of the user, and the shoulder position of the user is detected by a shoulder positioning module (not shown). As an example of the shoulder positioning method, a detection manner according to the up and down movement of the massage ball assembly 600 may be applied, but is not limited thereto, and any method for detecting the shoulder position may be applied.

That is, the shoulder positions of the user sitting on the massage chair may be detected by the shoulder positioning module (not shown), and the upward and downward movable range of the massage mass 650 in which the massage part 633 performs a sliding motion in the first direction toward the backrest part 100 to contact a predetermined range of the above-shoulder part may be decided based on the detected shoulder positions.

The present application as described above has the following effects.

The embodiments are described above in the specification with reference to the drawings so that those skilled in the art can easily understand and implement the present application, however, these embodiments are merely examples, and those skilled in the art can understand that various modifications and equivalent other embodiments can be realized from the embodiments of the present application. Accordingly, the scope of protection of this application is to be determined by the claims that follow.

Reference numerals

100: a backrest part;

110: a headrest;

120: a shoulder fixing part;

129: shoulder airbags;

200: a seat portion;

209: a pelvic airbag;

300: a leg fixing portion;

309: a leg airbag;

310: a foot fixing portion;

319: a foot bladder;

400: a support frame;

410: an arm fixing part;

419: an arm airbag;

500: an operation section;

600: a massage ball assembly;

610: a main frame;

611: a first mounting hole;

612: a first extension portion;

613: a second extension portion;

614: a first massage ball;

615: a power transmission unit;

615 a: a first protrusion;

616: a drive motor;

620: an inclined frame;

621: a second massage ball;

622: a warming ball;

623: a second mounting hole;

624: a first tilt frame;

625: a second tilt frame;

630: a shoulder massage module;

631: a first slide frame;

631 a: a first sliding frame projection;

632: a second skid frame;

632a second runner frame projection;

633: a shoulder massage part;

640: an elastic member;

650: massaging the mass.

Claims

1. A massage ball assembly of a massage chair, the massage ball assembly comprising:

a massage block 650 mounted inside the backrest part 100 of the massage chair;

a main frame (610) disposed on the massage block (650), the main frame (610) having a first massage ball (614) mounted thereon; and

a shoulder massage module (630) having a predetermined curvature and moving along a curved path corresponding to the predetermined curvature.

2. The massage ball assembly of a massage chair according to claim 1, wherein the shoulder massage module (630) comprises:

one or more skidding frames having the predetermined curvature and mounted on the main frame (610);

a shoulder massage part (633) installed at one end of the one or more sliding frames.

3. The massage ball assembly of a massage chair according to claim 2, wherein the main frame (610) is mounted with a power transmission unit (615) and a driving motor (616), the power transmission unit (615) is formed with a plurality of first protrusions (615a) along a circumferential direction of a side surface, the driving motor (616) provides power for rotating the power transmission unit (615),

an outer side of one of the one or more runner frames is formed with a plurality of runner frame protrusions that engage with the plurality of first protrusions (615a) along the predetermined curvature.

4. The massage ball assembly of a massage chair of claim 3, wherein the main frame (610) is capable of pivotal movement relative to a massage mass (650) and the one or more gliding frames are capable of gliding movement relative to the main frame (610) along the curved path.

5. The massage ball assembly of a massage chair of claim 4, wherein the slope of a tangent to a curve along which the curved path follows decreases toward the backrest portion (100).

6. The massage ball assembly of a massage chair according to claim 5, wherein the massage mass (650) is movable up and down inside the backrest portion (100),

the one or more sliding frames perform a sliding motion in a first direction toward the backrest part (100) within a predetermined range of a movable range of the up-and-down motion of the massage mass (650), and perform a sliding motion in a second direction opposite to the first direction within a range of the movable range other than the predetermined range.

7. The massage ball assembly of a massage chair of claim 6, wherein the predetermined range is determined based on a shoulder positioning module that detects shoulder positions of a user of the massage chair.

8. The massage ball assembly of a massage chair according to claim 3, further comprising a tilt frame (620), the tilt frame (620) being provided to be capable of a pivotal movement with respect to the main frame (610),

one or more of a second massage ball 621 and a warm ball 622 are mounted on the inclined frame 620, separately from the first massage ball 614 mounted on the main frame 610.

9. A massage chair comprising the massage ball assembly of any one of claims 1-8, wherein the massage chair comprises:

a seat section (200);

the backrest part (100) is rotatably fixed to one side of the seat part (200);

a leg fixing part (300) rotatably fixed to the other side of the seat part (200);

a support frame (400) for fixing the seat portion (200);

a massage ball assembly mounted to the backrest portion (100) and capable of one or more of up-and-down movement and side-to-side movement by the massage mass (650); and

and an operation part (500) for adjusting the rotation of the backrest part (100), the rotation of the leg fixing part (300), and the up-and-down movement or the left-and-right movement of the massage ball assembly.