Patent Publication Number: US-11389005-B2

Title: Foldable massage chair with front and back support legs

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a national stage application, filed under 35 U.S.C. § 371 of PCT Application No. PCT/IB2017/053990, filed on Sep. 21, 2017, which claims priority to Chinese Application 201720600692.2 filed May 26, 2017 and Chinese 201730185669.7 filed May 18, 2017, which are hereby incorporated by reference in their entireties. 
     BACKGROUND 
     Field 
     This disclosure relates to a massage chair used in the massage therapy field. Specifically, it is a massage chair that is foldable for portability. 
     Description of Related Art 
     When people get a back massage, they usually lie on their stomach on a bed. This requires a bed, which occupies a certain space. However, using a massage chair can reduce the space occupied. 
     SUMMARY 
     It is an aspect of this disclosure to provide a foldable massage chair. The massage chair includes: a face pillow assembly for supporting a user&#39;s head, a chest pillow assembly for supporting the user&#39;s chest, a handrail assembly for supporting the user&#39;s wrists, a front support piece, a seat cushion assembly, a back support assembly, a kneeboard assembly, a main supporting frame, a front supporting leg assembly, and a back supporting leg assembly. The face pillow assembly is rotatably connected to the chest pillow assembly. The chest pillow assembly is connected to the front support piece. The handrail assembly is connected to the front support piece. The front support piece is rotatably connected to the main supporting frame. The seat cushion assembly is rotatably connected to the main supporting frame. The back support assembly is connected to the seat cushion assembly and the main supporting frame and supports the seat cushion assembly. The front supporting leg assembly and the back supporting leg assembly are connected to the main supporting frame. The massage chair is configured to be moved between an expanded position and a collapsed position. The front supporting leg assembly and the back supporting leg assembly are both configured for placement on a surface in the expanded position making the massage chair stable. The seat cushion assembly and the front support rod are configured to be rotatably folded down towards the main supporting frame, and the chest pillow assembly and the handrail assembly are configured to be moved around. The front supporting leg assembly and the back supporting leg assembly are both configured to be moved and folded towards the main supporting frame to provide the massage chair in a collapsed position. 
     Other features and advantages of the present disclosure will become apparent from the following detailed description, the accompanying drawings, and the appended claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic of the disclosed massage chair in use by a person for receiving massage therapy from a massage therapist (masseuse); 
         FIG. 2  is a schematic of the massage chair of this disclosure in accordance with an embodiment herein; 
         FIG. 3  is a side view of the massage chair of  FIG. 2 , deployed for use in an expanded position; 
         FIG. 4  is a side view of the massage chair of  FIG. 2  in a collapsed position; 
         FIG. 5  is an exploded, back angled view of the parts of the massage chair of  FIG. 2 ; 
         FIG. 6  is a detailed view of parts of a face pillow assembly of the massage chair of  FIG. 2 ; 
         FIGS. 7A, 7B, and 7C  are schematics of how to adjust the face pillow assembly of  FIG. 6 ; 
         FIG. 8  is a detailed view of parts of a chest pillow assembly of the massage chair of  FIG. 2 ; 
         FIGS. 9A, 9B, and 9C  are schematics showing an underside of the chest pillow assembly of  FIG. 8 ; 
         FIGS. 10 and 11  are schematics of how to install the face pillow assembly of  FIG. 6  to the chest assembly of  FIG. 8 ; 
         FIG. 12  is a schematic of a plate used in a handrail assembly of the massage chair of  FIG. 2 ; 
         FIG. 13  is an exploded view of the parts of handrail assembly of the massage chair of  FIG. 2 ; 
         FIGS. 14A, 14B, and 14C  are schematics of how to adjust the handrail assembly in one manner; 
         FIGS. 15A and 15B  are schematics of how to adjust the handrail assembly and support rod; 
         FIG. 16  is an underside view of the handrail assembly parts of the massage chair; 
         FIG. 17  is an exploded view of parts of a support rod and handrail assembly of the massage chair of  FIG. 2 ; 
         FIG. 18  is a schematic showing vertical movement of the parts of  FIG. 17 ; 
         FIG. 19  is an exploded view of parts of the chest pillow assembly and first end of front support rod that are connected to each other in the massage chair of  FIG. 2 ; 
         FIGS. 20A and 20D  are schematics of how to adjust the chest pillow assembly relative to the front support rod; 
         FIGS. 20B and 20C  show the assembly of the chest pillow assembly in the support rod,  FIG. 20C  showing a detail of  FIG. 20B ; 
         FIG. 21  is an exploded view of a second end of the support rod and parts of a back supporting leg assembly to which it is connected in the massage chair of  FIG. 2 ; 
         FIG. 22  is a side perspective view of parts of the support rod; 
         FIG. 23  is a schematic of how to move or rotate the front support rod relative to the supporting frame; 
         FIG. 24  is a details view of parts configured to provide relative movement of the front support rod with respect to the supporting frame; 
         FIGS. 25A and 25B  are schematics of how to move and fold the front support rod when the massage chair is moved into a collapsed position; 
         FIGS. 26A and 26B  are a back perspective and detailed sectional view of the parts as shown in  FIG. 21 ; 
         FIG. 27  is a schematic of parts of the seat cushion assembly and its relative movement to the supporting frame; 
         FIGS. 28 and 29  show parts of a back support rod used with the seat cushion assembly in the massage chair of  FIG. 2 , and relative movement thereof; 
         FIG. 30  is a schematic of the movement of seat cushion assembly and back support rod of the massage chair; 
         FIG. 31  is a schematic showing a side view of the massage chair of  FIG. 2  in a collapsed position; 
         FIG. 32  is a schematic of parts forming the kneeboard assembly; 
         FIG. 33  is a schematic of how to remove and attach the kneeboard assembly to the main supporting frame of the massage chair of  FIG. 2 ; 
         FIG. 34  is a schematic showing connection and assembly of supporting frame and back supporting leg assembly at one end of the massage chair of  FIG. 2 ; 
         FIGS. 35 and 36  is a schematic showing parts, connection and assembly of supporting frame and front supporting leg assembly at another end of the massage chair of  FIG. 2 ; 
         FIGS. 37A, 37B, and 37C  are schematics of how to move or rotate the front support frame relative to the supporting frame; 
         FIGS. 38 and 39  are schematics showing movement of the parts of the massage chair from its expanded position to its collapsed position, respectively. 
     
    
    
     DETAILED DESCRIPTION 
     Disclosed herein is a massage chair used in the massage therapy field. Specifically, it is a foldable massage chair that is easy to carry, install, and fold. Its characteristics conform to the principles of ergonomics. This makes it easier for a masseur to massage people. Also, people will feel more comfortable when using this chair. It is convenient to use the chair. 
       FIG. 1  shows the herein described massage chair  100  in use by a person positioned on the chair  100  and ready to receive massage therapy from a massage therapist or masseuse or other healthcare professional. Generally, the massage chair  100  includes a face pillow assembly ( 1 ) (see also  FIG. 2 ) for supporting a head of a user, a chest pillow assembly ( 2 ) supporting a chest of user, a handrail assembly ( 3 ) supporting a user&#39;s wrists and forearms, a front support piece ( 4 ), a seat cushion assembly ( 5 ) for a user to place their buttocks for sitting, a back support rod ( 6 ) supporting the seat cushion assembly  5 , a kneeboard assembly ( 7 ) supporting knees and shins of the user, a main supporting frame ( 8 ), a back supporting leg assembly ( 9 ), a front supporting leg assembly ( 10 ), a metal tube bracket ( 11 ), and a plastic case ( 12 ) or cover. As will be described in greater detail below, the face pillow assembly ( 1 ) is rotatably connected to the chest pillow assembly ( 2 ), while the chest pillow assembly ( 2 ) is rotatably connected to the front support rod ( 4 ). The handrail assembly ( 3 ) is placed on the support rod ( 4 ). The support rod ( 4 ) is rotatably connected to the main supporting frame ( 8 ). The seat cushion assembly ( 5 ) is also rotatably connected to the main supporting frame ( 8 ). The main supporting frame ( 8 ) includes the metal tube bracket ( 11 ) which is covered by and connected to the main supporting frame side cover ( 12 ). The back support rod ( 6 ) forms a fixation frame with the seat cushion assembly ( 5 ) and the main supporting frame ( 8 ), which supports the seat cushion and the weight of the user placed thereon. The back supporting leg assembly ( 9 ) and the front supporting leg assembly ( 10 ) are rotatably connected to the main supporting frame ( 8 ), both of which are placed on the ground or floor, making the entire massage chair stable. When a user uses this chair, in its expanded position, as shown in  FIG. 1 , this user sits on the seat cushion (forwardly, with his/her chest facing towards the frame body) and leans on the massage chair, completely exposing his or her back, waist, and hips and making it easy for a masseur to massage him/her. When the chair needs to be put away, it is moved to a collapsed position, as shown in  FIG. 4  or  FIG. 31 , for example. As described and illustrated in the later description and drawings, it is possible to fold down the seat cushion assembly  5  and the front support rod/piece  4 , and it is possible to move the chest pillow assembly  2  and the handrail assembly  3  around (relative to the main supporting frame  8 ). Also, it is possible to move the back supporting leg assembly ( 9 ) towards the front for folding, and to move the front supporting leg assembly ( 10 ) backward for folding (both leg assemblies being moved, e.g., towards a center of the main supporting frame  8 , as shown in  FIG. 31 ). Consequently, the size of the entire chair decreases. Since each of the assemblies is configured to rotate relative to another assembly such that the massage chair  100  may be folded into a collapsed position, such as shown in  FIG. 4  or  FIG. 31 , it allows for (or increases) portability of the chair  100  such that a user or person can carry the chair  100  to another location and/or store it when not in use. 
       FIG. 5  shows an exploded view of the parts used and connected to assemble and form the massage chair  100 . A number of fasteners, screws, washers, etc. are shown in  FIG. 5  and it should be understood that a number of parts such as these, and others, are provided for securing or locking parts together, although not all of such parts are discussed in detail herein. 
       FIG. 6  shows parts of the face pillow assembly  1  which may include a face pillow ( 101 ) and a face pillow frame ( 102 ), in accordance with an embodiment. The face pillow frame ( 102 ) has a handle ( 103 ), two fastening legs ( 104 ), and a face pillow plate ( 105 ) that are connected by brackets. The face pillow plate  105  may be horseshoe-shaped or U-shaped, for example, or any other suitable shape for a user to position their face and head thereon. A face pillow ( 101 ) is placed on and secured to the face pillow plate ( 105 ). For example, the face pillow ( 101 ) may be attached to the face pillow frame ( 102 ) using hook and loop fasteners (a first half of which is generally represented in  FIG. 6  as  106 , provided on the plate  105 ) (or Velcro®). In one embodiment, the face pillow ( 101 ) may have a similar shape to that of the shape of the face pillow plate  105 . In another embodiment, the face pillow ( 101 ) may have a different shape as compared to the shape of the face pillow plate  105 . 
       FIGS. 7A, 7B, and 7C  show possible adjustments and directions of movement for the face pillow  101 &#39;s height (see  FIG. 7B , arrow E, representing vertical movement) and angle (see  FIG. 7C , arrow F, representing rotational movement) by means of the handle  103  and the brackets in the face pillow frame ( 102 ). For example, when the handle  103  is loosened, e.g., pulled away from the bracket  110  as shown by arrow A in  FIG. 6 , the face pillow plate  105  and face pillow  101  may be lifted (see  FIG. 7B ), or moved in an upward direction relative to the legs  104 , by rotating and lifting parts of the bracket  110 . Although not depicted in  FIG. 7B , the pillow  101  may also be tilted, in accordance with an embodiment. The face pillow plate  105  and face pillow  101  may be lowered and/or tilted (see  FIG. 7C ), or moved in a downward direction relative to the legs  104 , by rotating and lowering parts of the bracket  110 . To lock the position of the face pillow assembly  1 , the handle  103  may be tightened, e.g., pushed towards the bracket  110 . 
       FIG. 8  shows parts of the chest pillow assembly  2  which may include a chest pillow ( 201 ), a chest pillow board ( 202 ), a sliding slot guide rail ( 203 ), and at least one knob ( 204 ), in accordance with an embodiment. The chest pillow  201  is attached to the chest pillow board ( 202 ) by means of hook and loop fasteners (a first half of which is generally represented in  FIG. 8  as  208 , provided on near two edges of the board  202 ) (or Velcro®). A slot  208  may be provided on the board  202  for receiving part (e.g.,  208 ) of the hook and loop fasteners, which a matching part being provided on an underside of the chest pillow  201 . The chest pillow  201  may be in the form of a spongy cushion, in accordance with an embodiment. The chest pillow board  202  is fastened on the sliding slot guide rail ( 203 ) through bolts ( 206 ) and nuts ( 207 ). The sliding slot guide rail ( 203 ) has tube plugs ( 205 ) at both ends. Also present on the sliding slot guide rail ( 203 ) is a guide slot  210  (see also  FIG. 19 ). Further description regarding use of this guide slot  210  is provided later (e.g., see  FIGS. 15A, 19, and 20A-20D ). 
     As shown in the underside views of  FIGS. 9A-9C , and particular in  FIG. 9B , there are two knobs  204  each respectively connected to a tubular portion  212  provided on the bottom of the chest pillow board  202 . For example, the knobs  204  may include a screw portion extending therefrom that is inserted and rotated within a corresponding receiving opening of the tubular portions  212 . The tubular portions  212  are secured such that they are spaced with a distance therebetween. In one embodiment, the distance between the tubular portion  212  may be based on, or correspond to, spacing of the fastening legs  104 , such that the legs  104  slide into the tubular portion  212 . The face pillow assembly  1  is able to moves freely and is easy to install and remove. 
       FIGS. 10 and 11  show schematics of installing and securing the face pillow assembly  1  to the chest assembly  2 . The fastening legs ( 104 ) are aligned with openings of the tubular portions  212  and inserted through, and positioned against the chest pillow plate ( 202 ). Each of the knobs  204  may be rotated (e.g., clockwise) to move ends of their screw portions against the legs  104 , thereby fastening the face pillow assembly ( 1 ) on the chest pillow assembly ( 2 ). In contrast, when the knob ( 204 ) is loosened (e.g., rotated counter-clockwise), it is possible to move legs  104  of the face pillow frame  102  along with its pillow  201  (see  FIG. 10 ) back and forth within the tubular portions  212  (towards a back or front of the massage chair  100 ) to adjust its position relative to the chest pillow  201  of the chest pillow assembly  2 . Again, knobs  204  may be used to secure the pillow  201  at the desired distance relative to the chest pillow  201  by tightening them such that they engage the legs  104 . As described above with reference to FIGS.  7 A- 7 C, when the handle ( 103 ) is loosened, it is possible to move the face pillow plate  15  around the fastening leg ( 104 ) to adjust the position thereof relative to the chest assembly  2 . 
     Parts of handrail assembly  1  of the massage chair  100  are shown in  FIG. 13 . The handrail assembly may include a handrail cushion ( 301 ), a handrail plate ( 302 ) (see also  FIG. 12 ), a handle ( 303 ), a compression spring ( 304 ), an axis pin ( 305 ), a fastener ( 306 ), another handle ( 307 ), and another compression spring ( 308 ).  FIG. 18  is an underside view of the parts of handrail assembly  3  when assembled in the massage chair  100 . The handrail spongy cushion ( 301 ) may be attached to the handrail plate ( 302 ) by means of hook and loop fasteners (a first half of which is generally represented in  FIG. 13  as  315 , provided on the plate  302 ) (or Velcro®). As shown in  FIG. 12 , there may be an essential oil container ( 302 A) provided on the handrail plate ( 302 ), for receiving essential oils during a massage, to provide comfort to the user. Underneath the handrail plate ( 302 ) is installed a handle ( 303 ), shown in  FIG. 14A . The handle ( 303 ) goes through a frame portion  314  of the handrail plate ( 302 ), and a compression spring ( 304 ) and an axis pin ( 305 ) are installed on the handle  302 . By pulling the handle  303 , e.g., outwardly relative to the frame portion  314  as shown by arrow J in  FIG. 14B , the handrail plate  302  and handrail cushion  301  may be configured for rotation axially relative to fastener  306 , as shown in  FIG. 14C , for example. More specifically, pulling of the handle  303  outwardly results in the axis pin  305  being moved out and separating from a slot  306 A in a gear-shaped clamp  313  provided on the handrail fastener ( 306 ), thereby permitting rotation of and adjustment of the angle of the handrail plate  302 , e.g., by rotating the plate  302  relative to the fastener  306  which is rotatably connected to support rod  4  of the massage chair  100  (see  FIGS. 15A-15B ). The compression spring  304  pulls the handle  303  back into the frame portion  314 . 
     As shown in  FIGS. 15A-15B , the fastener  306  of the handrail assembly  3  goes through a front upright post ( 401 ) of the support rod  4  of the massage chair  100 .  FIG. 17  shows in more detail the handrail fastener ( 306 ), a handle ( 307 ), extension springs ( 308 ), a clamp inside handrail fastener ( 309 ), and screws ( 312 ) of the handrail assembly  3  which are connected together relative to the front support rod  401 . A handle ( 307 ) (see also  FIG. 13 ) is installed on the handrail fastener ( 306 ), and an extension spring ( 308 ) and a round retaining pin ( 307 A) are installed inside the handle ( 307 ). The handle ( 307 ) is fastened by means of screws  312 A and  312 B, and it is possible to move the handle  307  around for adjustment of the handrail assembly  3 , as explained further below with reference to  FIG. 18 . 
     In the massage chair  100 , the upright post  401  extends in a generally vertical direction. There is a saw-toothed slot ( 401 A) on the upright post  401  which allows the handrail fastener ( 306 ) to move vertically up and down along the rod  401 , as represented by arrow B in  FIG. 18 . Teeth in the saw-toothed slot  401 A are designed to face in an upward direction so that each tooth can receive the round retaining pin  307 A of handle therein, without it easily falling away from the tooth and into a groove of the slot  401 A. For example, when the handle ( 307 ) is pressed or pulled outwardly away from the upright post  401 , as represented by arrow C in  FIG. 18 , the retaining pin  307 A on the handle ( 307 ) separates from the teeth of the saw-toothed slot  401 A (see arrow D) and moves into the groove in the slot  401 A. The handrail assembly ( 3 ) is permitted to move up and down freely relative to the upright post  401  to a number of positions, e.g., positions  1  through  8  are generally shown as an example in  FIG. 17 . To lock the handrail assembly  3  in a desired position, the handle  307  is released and the retaining pin  307 A moves from the groove and into one of the teeth of the saw-toothed slot  401 A. 
     When needed, the handrail assembly  3  may be moved up without pressing the handle ( 307 ), and instead by handle  303 , as described previously and shown in  FIGS. 14B and 14C . 
       FIG. 19  shows parts used to connect the chest pillow assembly  2  at a first (upper) end of the upright post  401  of the support rod  4 . Upright post  401  may include a quick release handle ( 402 ), a plastic cover ( 407 ), a nut cover ( 408 ), a nut ( 409 ), a hole cover ( 410 ), and rotation plastic parts ( 411 ) installed on it. As previously noted, a sliding slot or guide slot  210  is provided on the chest pillow sliding slot guide rail ( 203 ). The guide rail  203  is inserted into an opening between flange portions at the first (upper) end of the upright post  401 , and is flanked on either side by rotation plastic parts  411  (see  FIGS. 20B and 20C ). The rotation plastic parts  411  each have a central opening with a connector portion extending from an outer side thereof, that are aligned with and inserted into holes in the flange portions of the upright post  401 . In an embodiment, the outer sides of the guide rail  203  include linear protrusions that are aligned within corresponding channels provided on an inner side of the rotation plastic parts  411  (see  FIG. 20C ). 
     The handle ( 402 ) is set up on the upper end of the upright post ( 401 ), through the guide slot  210  of the chest pillow sliding slot guide rail ( 203 ). An axis pin  402 A extending from handle  402  is inserted through a hole in plastic cover  407 . Plastic cover  401  is provided on an outer side of a flange portion of the upright post  401 . The axis pin  402 A is further inserted through the hole in the flange portion, through guide slot  210  of the guide rail  203 , and through the hole on the other flange portion of the post  401 . A nut  409  is connected to the end of the axis pin  402 A and tightened to secure the handle  402  on the upright post  401 . A nut cover  408  and a hole cover  410  (connected to the nut cover  408 ) may be attached to cover the end of the pin  402 A and nut  409 . 
     To adjust the chest pillow  201  of the chest pillow assembly  2  relative to the support rod  4 , the handle  402  may be loosened, e.g., moved or flipped back and forth between locked and unlocked positions, such as shown in  FIG. 20A . It is then possible to move the chest pillow plate  202  back and forth (see, e.g., arrow G in  FIG. 20D ) relative to the first (upper) end of the upright post  401  (towards a back or front of the massage chair  100 , as represented in  FIG. 15A ) by moving the guide rail  203  and its slot  210  (the slot  210  is guided along and relative to the pin  402 A). It is also possible to rotate the chest pillow plate  202  and chest pillow  201  around the upright post ( 401 ), as shown by arrow H. 
       FIG. 21  is an exploded view of parts of a second (bottom) end of the support rod  4  for connecting to an end of the supporting frame  8 . The front support rod  4  is configured to rotate relative to the main supporting frame  8  through a connection of a rotation case or guide  412  and positioning and rotary axial portion  413 . The upright post ( 401 ) is fixed on the rotating shaft guide ( 412 ), while the positioning and rotary axial portion ( 413 ) enters the rotating shaft guide ( 412 ) through a corresponding opening, as shown in  FIG. 22 . The positioning and rotary axial portion ( 413 ) is connected to the main supporting frame ( 8 ). There is a mutual spacing structure inside the rotating shaft guide ( 412 ) and the positioning and rotary axial portion ( 413 ). A positioning knob  414  is positioned perpendicularly relative to the guide  412  and has a portion (e.g., extending screw portion) inserted through a hole in the guide  412 , as shown greater detail in  FIG. 24 , for rotation. The knob is configured for rotational movement to lock or unlock rotation of the front support rod  4 . As illustrated in  FIG. 23 , the upright post ( 401 ) of the front support rod  4  may move or rotate around an axis, relative to the main supporting frame  8 , within a certain range. Internal spacing on the positioning and rotary axis of the rotation case restricts the moving of the front support rod. When the rotating shaft guide ( 412 ) moves to the maximum level, it is locked by the positioning knob ( 414 ), so the upright post remains stable without turning. For example, rotation of the knob  414  for insertion of its portion into a space of the positioning and rotary axial portion ( 413 ) may restrict the upright post&#39;s ( 401 ) rotation (relative to the supporting frame  8 ), and lock it in place, e.g., in an extended or in use position. Once the front support rod has been turned to the use position, the front support rod is restricted from movement by the knob by inserting the portion of the knob into a lock space. Conversely, to allow rotation of the upright post, the knob  414  may be rotated in an opposite direction (or pulled) such that its portion moves outwardly away from the space of the positioning and rotary axial portion ( 413 ) to disengage from it, allowing movement of the front support rod downwardly towards the main supporting frame  8 . 
     To assemble the parts, the rotating shaft guide  412  is fixed to the end of the upright post  401  using fasteners or bolts (see  FIG. 21 ). The positioning and rotary axial portion ( 413 ) is inserted through the opening of the rotating shaft guide  412  (see  FIG. 22 ). To assemble the support rod  4  to the main supporting frame  8 , the second end of the post  401  is inserted between leg portions at an (upper) end of the supporting frame  8  (see, e.g.,  FIG. 21 ), and secured via fasteners or screws.  FIGS. 26A and 26B  alternate views of the assembled parts as shown in  FIG. 21 . 
       FIGS. 25A and 25B  show how the front support rod  4  folds towards a front of the massage chair  100  (and towards main supporting frame  8 ), when the massage chair is moved into its collapsed position. 
       FIG. 27  shows parts of seat cushion assembly  5  of the massage chair  100 . The seat cushion assembly ( 5 ) includes a seat cushion ( 501 ), a seat cushion fastening base plate ( 502 ), and a seat cushion support rod or support arm ( 503 ). The seat cushion  501  may be formed from a spongy cushion material, for example. The seat cushion ( 501 ) is attached to the base plate ( 502 ) by means of hook and loop fasteners (a first half of which is generally represented in  FIG. 26  as  504 ) (or Velcro®). The base plate ( 502 ) is fastened on the support arm ( 503 ) by means of bolts and nuts or screws or other similar fasteners. The support arm  503  may have a general “U” shape or channel therein. The support arm  503  is attached to the main supporting frame  8  by aligning the arm  503  relative to the leg portions of the frame  8  and inserting axle rod through aligned holes in the arm  503  and legs of the supporting frame  8  and securing it to a via fasteners such as bolt(s) and/or nut(s). The seat cushion support arm ( 503 ) can rotate around and be folded towards or pulled away from the main supporting frame, as shown by arrow M in  FIG. 27 . When folded downwardly towards the frame  8 , the support arm  503  may be inserted between the legs of the frame  8  such that the base plate  502  and seat cushion  501  are positioned adjacent to and/or flush against the frame  8 . 
     Connected to the seat cushion assembly  5  and main supporting frame  8  is the back support rod  6 .  FIGS. 28 and 29  show parts of the back support rod  6  in greater detail. Back support rod ( 6 ) includes a back support rod or bar ( 601 ), a seat cushion support sheet ( 602 ), and a support sheet plate  603  with a fastening slot, which act as a support structure for the seat cushion  510 . The bar ( 601 ) goes through the seat cushion support sheet ( 602 ) and the support sheet plate ( 603 ). The seat cushion support arm ( 503 ) forms a stable triangle with the supporting frame and sheet  602  to support the entire seat cushion assembly  5  (see  FIGS. 27 and 28 ) when in an expanded position or in use position. 
     The seat cushion support rod ( 503 ) has a rotatable connection with the supporting frame ( 8 ). The bar  601  may be used to release the stable triangular support structure of the seat cushion assembly  5 . When the bar ( 601 ) is pulled outward, e.g., in the direction represented by arrow O in  FIG. 28 , the support sheet ( 602 ) is pulled. Consequently, the support sheet ( 602 ) separates from the support sheet plate ( 603 ) (i.e., from the fastening slot of the plate). At the same time, the support arm  503  may move downward towards it collapsed position. On the other hand, raising the seat cushion support arm ( 503 ) pulls the seat cushion support sheet ( 602 ), and the seat cushion support sheet ( 602 ) may automatically engage in fastening slot of the support sheet plate ( 603 ), supporting the entire seat cushion assembly ( 5 ) (see  FIG. 28 ). 
     In accordance with an embodiment, the support sheet plate ( 603 ) is welded to the main supporting frame ( 8 ). 
     In an embodiment, upward movement of the seat cushion assembly  5  to a raised position (relative to the frame  8 ) is configured to move the bar  601  and pull up the seat cushion supporting sheet  602 , which bypasses the support sheet plate  603 , and downward movement of the seat cushion assembly  5  allows the seat cushion assembly to lie flat. In one embodiment, when the seat cushion assembly  5  is raised to a certain height and angle, the seat cushion supporting sheet  602  will automatically be caused by gravity to fall into the fastening slot of the supporting sheet stop plate  603  (such as shown in  FIG. 28 ), and then it can be released as the seat cushion assembly will be at the desired angle and in an expanded position for use. 
     The ends of the seat cushion assembly  5  and back support rod  6  are configured to rotate relative to the leg portions of the support frame  8  as generally indicated by arrow M. FIG.  30  illustrates relative movements of parts of seat cushion assembly  5  and back support rod  6  of the massage chair  100 . In particular, FIG. shows movements of these parts for moving from an expanded position towards the collapsed position, shown in  FIG. 31 . 
     Two kneeboard assemblies  7  are also provided on the massage chair  100 . As shown in  FIGS. 32 and 33 , for each assembly  7 , a knee pillow ( 701 ) is attached to a kneeboard ( 702 ) by means of hook and loop fasteners (a first half of which is generally represented in  FIG. 31  as  705 ) (or Velcro®). The knee pillow  701  may be in the form of a spongy cushion. Two connecting tubes ( 703 ) are fastened on the kneeboard ( 702 ) by means of bolts ( 704 ) or screws or similar fasteners. The connecting tubes  703  are used to attached the kneeboard assemblies  7  to the main supporting frame  8 , and are easy to install. As shown in  FIG. 32 , corresponding openings for receiving the tubes  703  may be provided on the supporting frame ( 8 ). The connecting tube ( 703 ) is aligned with and runs through the opening on the supporting frame ( 8 ). When a user needs to use the kneeboard, the connecting tubes ( 703 ) are inserted through the fastening tubes on the supporting frame ( 8 ) to support the kneeboard. In addition, the kneeboard may be readily removed manually when not needed. 
     Also shown in  FIGS. 32 and 33  is the plastic cover  12  that covers the metal tube brackets ( 11 ) of the main supporting frame  8 . The plastic cover  12  may include left and right side covers (see  FIG. 5 ) that are connected together and cover the main supporting frame  8 . The upright post ( 4 ), the front supporting leg assembly ( 9 ), the back-supporting leg assembly ( 10 ), and the seat cushion assembly ( 5 ) are connected (rotatably) to the main supporting frame  8 . The upright post ( 4 ), the front supporting leg assembly ( 9 ), the back-supporting leg assembly ( 10 ), and the seat cushion assembly ( 5 ) are configured to be folded into a collapsed position by turning them relative to and towards the main supporting frame  8 , and unfolded into an expanded position by turning them away from the frame  8 . 
     Generally, the frame  8  includes two bracket or leg portions  11  that are positioned parallel to each other, shown in greater detail in  FIG. 5  and  FIG. 34 , for example. As shown in  FIG. 34 , the back supporting leg assembly  9  may include back supporting legs  901  extending from a base portion  904  at a bottom end and that may be connected via a bracket  902  at its upper end. Ends  802  of the brackets  11  of the supporting frame  8  are aligned in the bracket  902  and secured via fasteners  804  being inserted into aligned holes of the brackets  11  and bracket  902 . In accordance with an embodiment, the back supporting leg assembly  9  is configured for rotation relative to the main supporting frame  8 . For example, as represented by arrow P in  FIG. 34 , the back supporting leg assembly  9  may be configured for rotation underneath and towards the main supporting frame  8  and vice-versa. 
       FIGS. 35-36  show views of opposite ends  806  of the main support frame  8  along with the front supporting leg assembly  10 . The front supporting leg assembly ( 10 ) is connected to the main supporting frame ( 8 ) by bolts. It is possible to turn this assembly and fold it, and it is positioned against the main supporting frame ( 8 ). 
     As shown in  FIG. 35 , the front supporting leg assembly  10  may include a generally T-shaped configuration  10 A that has a supporting leg  1004  extending from a base portion  1006  at a bottom end, and may have a bracket  1008  at its upper end. As noted below, the bracket  1008  may be used to secure the assembly  10  to the ends  806  of the frame  8 . Specifically, a supporting leg rotating shaft guide ( 1002 ) may be welded to the main supporting frame ( 8 ), to which the bracket  1008  may be connected. A supporting leg rotating shaft ( 1001 ) engages in a corresponding opening in the supporting leg rotating shaft guide ( 1002 ). The supporting leg rotating shaft ( 1001 ) goes through the supporting leg rotating shaft guide ( 1002 ). The supporting leg rotating shaft ( 1001 ) is fastened to the head of the front supporting leg assembly ( 10 ) with a bolt ( 1003 ). It is possible to change its angle inside the supporting leg rotating shaft guide ( 1002 ), and its position can be restricted. In accordance with an embodiment, the rotating shaft  1001  and shaft guide  1002  are similar to the rotating shaft guide ( 412 ) and positioning and rotary axial portion ( 413 ) described above with reference to support rod, as shown in  FIGS. 22-24 and 26A-26B . To assemble the parts, the shaft guide  1002  may be fixed to the bracket  1008  of the leg  1004  using fasteners or bolts (see  FIG. 35 ).  FIG. 37A  shows a detailed view of the assembly of the parts. 
     As shown in  FIG. 36  and represented by arrow Q, the front supporting leg assembly  10  may be configured for rotation underneath and towards the main supporting frame  8 , and vice-versa, for movement between extended (in-use) and folded (collapsed) positions, e.g., for when the massage chair  100  is expanded or collapsed.  FIG. 37B  shows a first position, i.e., an extended or expanded position, of the supporting leg  1004  of the front supporting leg assembly  10  relative to the brackets  11  of frame  8 , where the leg  1004  is positioned away from an underside of the frame  8 .  FIG. 37C  shows a second position, i.e., a folded or collapsed position, of the supporting leg  1004  of the front supporting leg assembly  10 , where the leg  1004  is moved and folded towards the frame  8  and positioned adjacent or next to it. 
     When using the massage chair  100 , then, both the back supporting leg assembly ( 9 ) and front supporting leg assembly  10  may be moved or rotated backward and forward, respectively. When folding up the massage chair  100 , the back supporting leg assembly ( 9 ) and front supporting leg assembly  10  may be moved toward the support frame  8 , i.e., rotated forward and backward, respectively. 
     In an embodiment, the front supporting leg assembly  10  and back supporting leg assembly  9  are positioned such that there is an obtuse angle relative to an underside of the main supporting frame  8  in the expanded positon of the massage chair  10 . 
       FIGS. 38 and 39  are schematics showing movement of the parts of the massage chair  100  from its expanded position to its collapsed position, respectively. Generally,  FIG. 38  shows the face pillow assembly ( 1 ) is rotatably connected to the chest pillow assembly ( 2 ), and its height may be adjusted by moving it around when the massage chair  100  is expanded for use. Also, the chest pillow assembly ( 2 ) is rotatably connected to the upright post ( 401 ), and its length may be adjusted along the sliding slot  401 A. The handrail assembly ( 3 ) is connected to the upright post ( 401 ), and the handrail fastener ( 306 ) may be adjusted along the upright post ( 401 ). The angle of the handrail plate ( 302 ) may also be adjusted. The upright post ( 401 ) is rotatably connected to the supporting frame ( 8 ), which may be adjusted by moving it around an axis. The seat assembly ( 5 ) is rotatably connected to the supporting frame ( 8 ), which may be adjusted by moving it around an axis. The back supporting leg assembly ( 9 ) and front supporting leg assembly  10  are both further rotatably connected to the supporting frame ( 8 ), and may be adjusted by moving them around their respective axes. 
     Further, to collapse the chair  100 , the parts may be folded by using their connections and rotating the parts about a number of axes. During movement or folding or collapsing, the support rod  4  is rotated towards the main supporting frame  8 . The seat assembly  5  can be rotated further downward towards the main supporting frame  8  (as previously described), and the back supporting leg assembly  9  and the front supporting leg assembly  10  are each folded under or towards the supporting frame  8 , as shown in  FIG. 38 , to collapse the massage chair as shown in  FIG. 39  (see also  FIGS. 4 and 31 ). 
     In accordance with embodiments herein, the face pillow ( 101 ), the chest pillow ( 201 ), the handrail ( 301 ), the seat cushion ( 501 ), and the knee pillow ( 701 ) are made of soft materials, such as sponge, so as to be more comfortable to the touch. 
     While the principles of the disclosure have been made clear in the illustrative embodiments set forth above, it will be apparent to those skilled in the art that various modifications may be made to the structure, arrangement, proportion, elements, materials, and components used in the practice of the disclosure. 
     It will thus be seen that the features of this disclosure have been fully and effectively accomplished. It will be realized, however, that the foregoing preferred specific embodiments have been shown and described for the purpose of illustrating the functional and structural principles of this disclosure and are subject to change without departure from such principles. Therefore, this disclosure includes all modifications encompassed within the spirit and scope of the following claims.