# US 12,521,301 B2 · Massage apparatus including arm massage part > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,521,301 B2 - Document ID: US12521301B2 - Status: Granted - Kind: B2 - Application number: 17/927,745 - Filed: 2021-05-26 - Published: 2023-06-29 - Granted: 2026-01-13 - Earliest claimed: 2020-05-27 - Assignees: Bodyfriend Co., Ltd. - Applicants: Bodyfriend Co., Ltd. - Inventors: Deok Hyun Kong; Myeong Jin You; Yong Ju Kwon - Web page: https://patentgrep.com/patent/US12521301B2 ## CPC - A61H 7/007: {Kneading} - A61H 15/0078: {power-driven} - A47C 1/024: the parts, being the back-rest, or the back-rest and seat unit, having adjustable inclination - A47C 1/03: the parts being arm-rests - A47C 1/031: having coupled {concurrently} adjustable supporting parts - A61H 9/0078: {with intermittent or alternately inflated bladders or cuffs (mattresses for preventing bed-sores with alternated pressurized chambers A61G7/05776)} - A61H 23/006: {Percussion or tapping massage (hand percussion A61H23/06)} - A61H 2015/0014: {cylinder-like, i.e. rollers} - A61H 2015/0042: {Balls or spheres} - A61H 2201/0107: modular - A61H 2201/0149: Seat or chair - A61H 2201/0157: portable - A61H 2201/0192: Specific means for adjusting dimensions - A61H 2201/1207: with electric or magnetic drive - A61H 2201/14: Special force transmission means, i.e. between the driving means and the interface with the user - A61H 2201/149: rotation-linear or vice versa - A61H 2201/1623: Back - A61H 2201/1633: Seat (A61H2201/0149 takes precedence) - A61H 2201/1635: Hand or arm, e.g. handle - A61H 2201/164: Feet or leg, e.g. pedal - A61H 2201/1664: linear - A61H 2201/1671: rotational - A61H 2201/1676: Pivoting - A61H 2201/5012: using the internet - A61H 2201/5048: Audio interfaces, e.g. voice or music controlled - A61H 2203/0437: with stretched legs, like in a bed - A61H 2203/0456: Supine - A61H 2205/06: Arms - A61H 2205/10: Leg - A61H 2205/106: for the lower legs - A61H: PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY (electrotherapy, magnetotherapy, radiation therapy or ultrasound therapy A61N) - A47C: CHAIRS; SOFAS; BEDS ## Abstract The present disclosure relates to a massage apparatus including an arm massage part, the massage apparatus comprising: a frame connection part which connects a buttock frame provided in a main frame and a back frame provided in the main frame, and which rotates about a frame rotation axis on the basis of the movement of the back frame; a driving shaft which passes through the frame connection part and moves along an arc-shaped driving shaft slot on the basis of the movement of the back frame; and an arm massage frame holder which moves along a sliding rail on the basis of the movement of a plurality of links that transmit the movement of the driving shaft. ## Claims ### Claim 1 A massage apparatus comprising: a frame connection part for connecting a buttock frame included in a main frame and a back frame included in the main frame and rotating around a frame rotation shaft depending on movement of the back frame; a driving shaft passing through the frame connection part and moving along an arc-shaped driving shaft slot depending on the movement of the back frame; a third link for transmitting the movement of the driving shaft; a second link rotating around a link rotation shaft depending on the movement of the third link; a first link transmitting the movement of the second link to an arm massage unit frame holder; and the arm massage unit frame holder moving along a sliding rail depending on the movement of the first link, wherein the driving shaft is connected to one end of the third link, the other end of the third link is connected to one end of the second link, and the other end of the first link is connected to the arm massage unit frame holder. ### Claim 2 (depends on 1) The massage apparatus according to claim 1, wherein the first link, the second link, the third link, the arm massage unit frame holder, the driving shaft slot, the arm massage unit coupling groove, and the sliding rail are included in a side cover, and wherein the side cover is separable from the massage apparatus. ### Claim 3 (depends on 2) The massage apparatus according to claim 2, wherein the main frame is separable from the side cover, and wherein a main frame protrusion included in the main frame is inserted into the arm massage unit coupling groove included in the side cover, and the driving shaft is inserted into the driving shaft slot included in the side cover, and the side cover is coupled to the massage apparatus. ### Claim 4 (depends on 1) The massage apparatus according to claim 1, further comprising: a driving shaft plunger connecting the driving shaft and the third link, wherein the driving shaft is inserted into a groove of the driving shaft plunger, and wherein the driving shaft plunger is coupled to the third link. ### Claim 5 (depends on 1) The massage apparatus of claim 1, wherein a length ranging from the link rotation shaft to one end of the second link is shorter than a length ranging from the link rotation shaft to the other end of the second link. ### Claim 6 (depends on 1) The massage apparatus of claim 1, wherein when the back frame is tilted backward, the frame connection part rotates around the frame rotation shaft, wherein the driving shaft passing through the other end of the frame connection part moves forward along the driving shaft slot, wherein the third link connected to the driving shaft moves one end of the second link forward so that the second link rotates around the link rotation shaft, wherein the other end of the second link moves backward by the rotation of the second link, and wherein the first link connected to the other end of the second link moves backward along the sliding rail together with the arm massage unit frame holder. ### Claim 7 (depends on 2) The massage apparatus of claim 2, wherein the side cover includes a lower cover and an upper cover, and the lower cover has an inclined surface descending backward and is fixed to the main frame not to move, and wherein the sliding rail is disposed along an inclined surface of the lower cover. ### Claim 8 (depends on 7) The massage apparatus of claim 7, wherein the upper cover includes an arm massage unit frame, and the arm massage unit frame coupled to the arm massage unit frame holder descends backward based on the sliding rail on the inclined surface. ### Claim 9 (depends on 1) The massage apparatus of claim 1, wherein the frame rotation shaft of the frame connection part passes through the buttocks frame from side to side, and wherein the frame connection part rotates around the frame rotary shaft so that the buttock frame does not move when the back frame is tilted backward or is erected forward. ### Claim 10 (depends on 1) The massage apparatus of claim 1, wherein the frame rotation shaft of the frame connection part penetrates a back of the buttock frame from side to side, and wherein a front of the buttock frame moves upward or downward based on the frame rotation shaft in a state in which the frame connection part and the back frame do not move. ### Claim 11 (depends on 1) The massage apparatus of claim 1, wherein the driving shaft slot is in an arc shape of which the ground direction is convex. ### Claim 12 (depends on 1) The massage apparatus of claim 1, wherein the driving shaft is rotatable along the arc-shaped driving shaft slot around the frame rotation shaft of the frame connection part.