Massage chair

Abstract

A massage chair is used for solving the technical problems that in the prior art, in order to achieve multi-part massage, a massage chair in the prior art needs to be additionally provided with a plurality of motors for driving a massage structure to conduct massage operation on specific positions, but due to the fact that the motors are additionally arranged in the inner space of the massage chair, the occupied area of the massage chair is large. Comprising a seat plate, a backrest and two armrest frames, a driving shaft is arranged in the backrest, first driven shafts are arranged at the two ends of the driving shaft, a second driven shaft is arranged between the two first driven shafts, and power transmission assemblies are arranged between the second driven shaft and the adjacent first driven shafts; the power transmission assembly is used for transmitting power to the two first driven shafts and / or the second driven shafts, a massage rod is rotationally arranged on one side, where a human body leans, of the backrest, a rotating assembly used for driving the massage rod to rotate in a reciprocating mode is arranged in the backrest, and the second driven shafts are used for driving the rotating assembly. And massage strips for massaging arms are arranged on the two armrest frames.

Description

Technical Field

[0001] The present invention relates to the technical field of seat processing, and in particular to a massage chair. Background Art

[0002] The massage chair uses mechanical rolling force and mechanical extrusion to perform massage. Manual massage can dredge the meridians, circulate qi and blood, and maintain the body's yin and yang balance. Therefore, after the massage, you can feel the muscles relaxed, the joints flexible, the spirit lifted, and fatigue eliminated, which plays an important role in ensuring good health.

[0003] A massage chair in the prior art, such as the utility model patent document with authorization announcement number "CN220237317U" and patent name "A Nursing Massage Chair", discloses a massage chair, including a seesaw frame, the upper end of the seesaw frame is fixedly connected to a seat cushion plate, one side of the seat cushion plate is fixedly connected to a seat box, both sides of the seat box are fixedly connected to baffles, the upper end of the baffles is fixedly connected to armrests, one side of the seat box is fixedly connected to a foot pedal, the upper end of the seat box is plugged with a backrest, and one side of the backrest is fixedly connected to a backrest cushion.

[0004] In order to achieve multi-part massage in the above patent document, it is necessary to add multiple motors to drive the massage structure to perform massage operations on specific positions. However, since multiple motors are added to the internal space of the massage chair, the massage chair occupies a larger area, and the setting of multiple motors leads to increased energy consumption. Summary of the Invention

[0005] The purpose of the present invention is to address the deficiencies of the existing technology and propose a massage chair to solve the technical problems mentioned in the background technology that in order to achieve multi-part massage, the massage chair of the existing technology needs to add multiple motors to drive the massage structure to perform massage operations on specific positions, but the addition of multiple motors to the internal space of the massage chair causes the massage chair to occupy a larger area, and the setting of multiple motors leads to increased energy consumption.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A massage chair comprises a seat plate and a backrest fixed on the top of the seat plate and two armrest frames fixed on both sides of the seat plate, a drive shaft is provided inside the backrest, a first driven shaft is coaxially sleeved on both ends of the drive shaft, a second driven shaft is provided between the two first driven shafts, the second driven shaft is coaxially arranged with the drive shaft, a power transmission component is provided between the two ends of the second driven shaft and the end of the adjacent first driven shaft, the power transmission component is used to transmit power to the two first driven shafts and / or the second driven shafts, the backrest is used for the human body to rotate on one side and is provided with a massage rod, a rotating component for reciprocatingly driving the massage rod to rotate is provided in the backrest, the second driven shaft is used to drive the rotating component, massage strips for massaging the arms are provided on the two armrest frames, and moving components for driving the two massage strips to move back and forth are respectively provided in the two armrest frames, and the two first driven shafts are used to drive the two moving components respectively.

[0008] Working principle:

[0009] When the power transmission component transmits power to the two first driven shafts and the second driven shaft, the driving shaft is started, and the driving shaft synchronously drives the two first driven shafts and the second driven shaft to rotate. The two first driven shafts can respectively drive the two moving components synchronously. The two moving components can drive the massage strips on the armrest frame, so that the massage strips can perform reciprocating massage operations on the side where the human arm is placed. The second driven shaft can drive the rotating component, and the rotating component can drive the massage rod to rotate, and the massage rod can perform massage operations on the side where the human arm is leaning.

[0010] When the power transmission component transmits the power on the driving shaft to the two first driven shafts, the second driven shaft is decoupled from the driving shaft, so that the second driven shaft is in a stopped rotating state when the two first driven shafts rotate, and then the two first driven shafts can drive the massage bars on the armrest frame to perform massage operations on the human body.

[0011] When the power transmission component transmits the power on the driving shaft to the second driven shaft, the two first driven shafts are decoupled from the driving shaft, so that the two first driven shafts are in a stopped rotating state when the second driven shaft rotates, and then the second driven shaft can drive the massage rod on the rotating component to perform massage operations on the human body.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] First, a driving shaft, a first driven shaft, a second driven shaft and a power transmission assembly are provided. The driving shaft drives the first driven shaft and the second driven shaft through the power transmission assembly, thereby realizing synchronous driving of the massage rod and the massage strips in the two armrest frames by a single power source. Furthermore, the power transmission assembly can be used to couple the driving shaft with the two first driven shafts while the second driven shaft is decoupled from the driving shaft, thereby realizing independent driving of the two first driven shafts. Furthermore, the power transmission assembly can be used to couple the driving shaft with the second driven shaft while the two first driven shafts are decoupled from the driving shaft, thereby realizing independent driving of the second driven shaft, thereby avoiding structural redundancy requiring independent motors to drive different parts and significantly simplifying the mechanical transmission path.

[0014] Secondly, a rotating assembly is provided, and the rotating assembly is driven by the second driven shaft to drive the massage rod to swing back and forth, thereby facilitating operation on one side of the user's body.

[0015] Third, a moving assembly is provided, and the moving assembly is driven by the first driven shaft to drive the massage strip to move back and forth linearly, thereby facilitating the massage operation on the user's arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;

[0017] Figure 2 for Figure 1 A schematic cross-sectional view of the structure at point A in the middle;

[0018] Figure 3 for Figure 1 A schematic cross-sectional view of the structure at position B is enlarged;

[0019] Figure 4 for Figure 1 A schematic cross-sectional view of the structure at position C in the middle is enlarged;

[0020] Figure 5 for Figure 1 Schematic diagram of the enlarged cross-section of the structure at point D.

[0021] Explanation of the accompanying drawings: seat plate 1, backrest 2, armrest frame 3, drive shaft 4, first driven shaft 5, second driven shaft 6, massage rod 7, massage strip 8, first clamping block 9, guide rod 10, second clamping block 11, spring 12, slide groove 13, clamping tooth 14, pushing block 15, rotating shaft 16, rotating block 17, through groove 18, abutment groove 19, ball 20, steering motor 21, first sprocket 22, first chain 23, drive motor 24, second sprocket 25, second chain 26, drive gear 27, driven gear 28, rotating rod 29, first cam 30, connecting rod 31, support plate 32, connecting block 33, first bevel gear 34, mounting rod 35, second bevel gear 36, first rack 37, massage ball 38, second cam 39, drive block 40, guide bar 41, first gear 42, guide groove 43, second rack 44, second gear 45. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0023] Example:

[0024] like Figure 1 As shown, a massage chair includes a seat plate 1 and a backrest 2 fixed on the top of the seat plate 1 and two armrest frames 3 fixed on both sides of the seat plate 1. A drive shaft 4 is provided inside the backrest 2, and a drive motor 24 is fixed in one of the armrest frames 3. A second sprocket 25 is fixed on the output end of the drive motor 24 and on the drive shaft 4. A second chain 26 is sleeved on the two second sprockets 25. The second sprocket 25 and the chain are driven by the drive motor 24, thereby driving the drive shaft 4 to rotate.

[0025] like Figure 1 and Figure 2 As shown, both ends of the driving shaft 4 are coaxially sleeved with a first driven shaft 5, a second driven shaft 6 is provided between the two first driven shafts 5, the second driven shaft 6 is coaxially arranged with the driving shaft 4, and power transmission components are provided between both ends of the second driven shaft 6 and the ends of the adjacent first driven shafts 5. Through the power transmission component, the connection relationship between the first driven shaft 5, the second driven shaft 6 and the driving shaft 4 can be divided into three modes. The first mode is that the driving shaft 4 is coupled with the two first driven shafts 5, and the second driven shaft 6 is decoupled from the driving shaft 4. The second mode is that the driving shaft 4 is decoupled from the two first driven shafts 5, and the second driven shaft 6 is coupled with the driving shaft 4. The third mode is that the driving shaft 4 is coupled with the two first driven shafts 5, and the second driven shaft 6 is coupled with the driving shaft 4.

[0026] like Figure 1 and Figure 2As shown, the power transmission assembly includes two first clamping blocks 9, two guide rods 10, two second clamping blocks 11 and two springs 12. The two first clamping blocks 9 are respectively fixed to the adjacent ends of the first driven shaft 5 and the second driven shaft 6. Two slide grooves 13 are opened on the drive shaft 4. The two guide rods 10 are respectively fixed in the two slide grooves 13. The two second clamping blocks 11 are respectively slidably arranged in the two slide grooves 13 and the two second clamping blocks 11 are located between the two first clamping blocks 9. The two springs 12 are respectively sleeved on the two guide rods 10 and the two ends of the spring 12 are respectively fixed to the inner wall of the slide groove 13 and the second clamping block 11. When the spring 12 is in the natural state, the second clamping block 11 is disengaged from the first clamping block 9 by the pre-tightening force of the spring 12. The two second clamping blocks The block 11 and the clamping ends of the two first clamping blocks 9 are provided with matching clamping teeth 14, and also include a pushing assembly, which is arranged between the two second clamping blocks 11 and the pushing assembly. The two second clamping blocks 11 can be pushed by the pushing assembly to engage with the two corresponding first clamping blocks 9. At this time, the spring 12 is in a stretched state, so that the drive shaft 4 is synchronously coupled with the first driven shaft 5 and the second driven shaft 6. Furthermore, the second clamping block 11 on one side can be pushed by the pushing assembly to engage with the corresponding first clamping block 9, and the second clamping block 11 on the other side is disengaged from the first clamping block 9 under the preload force of the spring 12, thereby realizing the coupling or decoupling of the drive shaft 4 and the first driven shaft 5 and the decoupling or coupling state of the drive shaft 4 and the second driven shaft 6.

[0027] like Figure 1 and Figure 2 and Figure 3As shown, the pushing assembly includes two pushing blocks 15, a rotating shaft 16 and a T-shaped rotating block 17. A through slot 18 is provided on the seat plate 1 that runs through to the backrest 2. The two pushing blocks 15 are slidably arranged in the through slot 18 and the two pushing blocks 15 are used to push the two second clamping blocks 11 and the two first clamping blocks 9 corresponding to each other. The rotating shaft 16 is rotatably arranged in the through slot 18. The rotating block 17 is fixed on the rotating shaft 16 and the rotating block 17 is used to push the two pushing blocks 15 and the two second clamping blocks 11 corresponding to each other. A steering motor 21 is fixed in the seat plate 1. The output end of the steering motor 21 is fixed to one of the rotating shafts 16. A first sprocket 22 is fixed on each of the two rotating shafts 16. The two A first chain 23 is sleeved on the first sprocket 22, and the steering motor 21 drives the rotating shaft 16 through the first chain 23, driving the T-shaped rotating block 17 to rotate, pushing the pushing block 15 to slide in the through groove 18, and making the pushing block 15 abut against the corresponding second clamping block 11. When the driving shaft 4 is coupled with the second driven shaft 6 and the driving shaft 4 is decoupled from the two first driven shafts 5, the vertical ends of the two T-blocks are opposite to each other. When the driving shaft 4 is decoupled from the second driven shaft 6 and the driving shaft 4 is coupled with the two first driven shafts 5, the vertical ends of the two T-blocks are opposite to each other. When the driving shaft 4 is coupled with the second driven shaft 6 and the driving shaft 4 is coupled with the two first driven shafts 5, the lateral ends of the two T-blocks are parallel to the axis of the driving shaft 4.

[0028] like Figure 2 As shown, the second clamping block 11 is further provided with an annular abutting groove 19, and a plurality of balls 20 are rotatably provided on the pushing block 15 and the plurality of balls 20 are rollingly connected with the abutting groove 19. The rolling contact between the balls 20 and the abutting groove 19 can reduce friction resistance.

[0029] like Figure 1 and Figure 4As shown, the backrest 2 is used for the human body to rotate on one side and is provided with a massage rod 7. A rotating assembly for reciprocatingly driving the massage rod 7 to rotate is provided in the backrest 2. The second driven shaft 6 is used to drive the rotating assembly. The rotating assembly includes a driving gear 27, a driven gear 28, two rotating rods 29, two first cams 30 and a connecting rod 31. The driving gear 27 is fixed on the second driven shaft 6 and the two are coaxial. A support plate 32 is fixed in the backrest 2. The second driven shaft 6 is rotatably provided on the support plate 32. The driven gear 28 is rotatably provided on the support plate 32 and the driven gear 28 is meshed with the driving gear 27. The two rotating rods 29 are rotatably provided in the backrest 2 and the two are coaxial. The two first cams 30 are respectively The two first cams 30 are fixed on the adjacent ends of the two rotating rods 29. A connecting block 33 is fixed between the two first cams 30. One end of the connecting rod 31 is rotatably provided on the driven gear 28, and the other end is rotatably provided on the connecting block 33. The two ends of the massage rod 7 are respectively fixed on the two rotating rods 29. When the second driven shaft 6 is coupled with the drive shaft 4, the second driven shaft 6 can drive the gear 27, so that the driving gear 27 can drive the driven gear 28, and then the driven gear 28 drives the connecting rod 31 to push and pull the two first cams 30. The two first cams 30 drive the two rotating rods 29, so that the massage rod 7 swings back and forth. The connection between the connecting rod 31 and the driven gear 28 is not at the axis of the driven gear 28.

[0030] like Figure 1 and Figure 5 As shown, massage strips 8 for massaging the arms are provided on both armrest frames 3, and moving components for driving the two massage strips 8 to move back and forth are respectively provided in the two armrest frames 3. The massage strips 8 include two first racks 37 and a plurality of massage balls 38. The two first racks 37 are slidably arranged in the armrest frames 3, and the plurality of massage balls 38 are respectively rotatably arranged on the two first racks 37 and the massage balls 38 face the top of the armrest frames 3. The moving component includes a second cam 39, a driving block 40, a guide bar 41 and a first gear 42. The second cam 39 is fixed to the mounting rod 35 away from the second bevel gear 36. At the end, the driving block 40 is rotatably arranged on the second cam 39, the guide bar 41 is fixed on one of the first racks 37 and a guide groove 43 is opened on the guide bar 41, the driving block 40 is slidably arranged in the guide groove 43, the first gear 42 is rotatably arranged in the armrest frame 3 and the first gear 42 is respectively engaged with the two first racks 37, the mounting rod 35 drives the second cam 39 to rotate, the driving block 40 slides in the guide groove 43, driving the first rack 37 to reciprocate, and at the same time the first gear 42 reversely drives the other first rack 37, so as to realize the reciprocating linear motion of the massage balls 38 on the two first racks 37.

[0031] like Figure 1 and Figure 5As shown, a second rack 44 is provided above the two first racks 37, two second gears 45 are fixed to the armrest frame 3, and a second gear 45 is fixed to a plurality of massage balls 38. The plurality of second gears 45 are respectively engaged with the two second racks 44. The second gears 45 are engaged with the second racks 44 to drive the massage balls 38 to rotate while moving in a straight line.

[0032] like Figure 1 As shown, the two first driven shafts 5 are respectively used to drive the two moving components, and the two first driven shafts 5 are fixed with a first bevel gear 34 at the end away from the first clamping block 9. A mounting rod 35 is rotatably provided in the two handrail frames 3, and a second bevel gear 36 is fixed at the end of the two mounting rods 35. The two second bevel gears 36 are respectively engaged with the two first bevel gears 34. The two mounting rods 35 are respectively used to drive the two moving components, and the second bevel gear 36 on the mounting rod 35 is engaged with the first bevel gear 34 on the first driven shaft 5, so that the mounting rod 35 can be driven to rotate synchronously when the first driven shaft 5 rotates.

[0033] Working principle:

[0034] First, when the user needs the massage strip 8 and the massage rod 7 to perform massage operations synchronously, the user starts the steering motor 21, and the steering motor 21 drives the two rotating shafts 16 to rotate synchronously through the first sprocket 22 and the first chain 23. The two rotating shafts 16 drive the two rotating blocks 17 to rotate, so that the rotating blocks 17 can push the two pushing blocks 15. The pushing blocks 15 push the second clamping blocks 11 on both sides to fully engage with the first clamping blocks 9. The power of the drive shaft 4 is synchronously transmitted to the two first driven shafts 5 and the second driven shaft 6. The second driven shaft 6 drives the driven gears 27. The wheel 28 rotates eccentrically, driving the first cam 30 to swing through the connecting rod 31, and the massage rod 7 rotates back and forth. The first driven shaft 5 drives the mounting rod 35 synchronously under the action of the first bevel gear 34 and the second bevel gear 36. The mounting rod 35 drives the second cam 39. The driving block 40 slides in the guide groove 43, driving the first rack 37 to reciprocate. At the same time, the first gear 42 drives the other first rack 37 in the opposite direction, realizing the reciprocating linear motion of the massage balls 38 on the two first racks 37. At the same time, the massage balls 38 engage with the second rack 44 through the second gear 45 to generate rotation.

[0035] When the operator subsequently needs to use the massage rod 7 alone for massage operation, the user starts the steering motor 21 again. The steering motor 21 synchronously drives the two rotating shafts 16 to rotate through the first sprocket 22 and the first chain 23. The two rotating shafts 16 drive the two rotating blocks 17 to rotate, so that the rotating block 17 can push a pushing block 15 on one side. The pushing block 15 pushes the second clamping block 11 on one side to fully engage with the first clamping block 9 on the second drive shaft 4, so that the second driven shaft 6 can drive the massage rod 7 to rotate back and forth.

[0036] Later, when the operator needs to use the massage bar 8 in the armrest frame 3 alone for massage operation, the user starts the steering motor 21 again. The steering motor 21 synchronously drives the two rotating shafts 16 to rotate through the first sprocket 22 and the first chain 23. The two rotating shafts 16 drive the two rotating blocks 17 to rotate, so that the rotating block 17 can push a pushing block 15 on one side, and the pushing block 15 pushes the second clamping block 11 on one side to fully engage with the first clamping block 9 on the first drive shaft 4, so that the two first driven shafts 5 can drive the massage balls 38 to perform massage operation.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A massage chair, characterized in that: The utility model comprises a seat plate (1), a backrest (2) fixed on the top of the seat plate (1), and two armrest frames (3) fixed on both sides of the seat plate (1); a driving shaft (4) is provided inside the backrest (2); a first driven shaft (5) is coaxially sleeved at both ends of the driving shaft (4); a second driven shaft (6) is provided between the two first driven shafts (5); the second driven shaft (6) is coaxially arranged with the driving shaft (4); a power transmission component is provided between the two ends of the second driven shaft (6) and the adjacent end of the first driven shaft (5); the power transmission component is used to transmit power to the first driven shaft (5); and the power transmission component is used to transmit power to the first driven shaft (5). The backrest (2) is provided with a massage rod (7) for the human body to rotate on one side, and a rotating assembly for reciprocatingly driving the massage rod (7) is provided in the backrest (2). The second driven shaft (6) is used to drive the rotating assembly. Massage strips (8) for massaging the arms are provided on the two armrest frames (3). A moving assembly for driving the two massage strips (8) to move back and forth is provided in the two armrest frames (3). The two first driven shafts (5) are used to drive the two moving assemblies respectively.

2. The massage chair according to claim 1, characterized in that: The power transmission assembly comprises two first clamping blocks (9), two guide rods (10), two second clamping blocks (11) and two springs (12). The two first clamping blocks (9) are respectively fixed to the adjacent ends of the first driven shaft (5) and the second driven shaft (6). Two sliding grooves (13) are provided on the driving shaft (4). The two guide rods (10) are respectively fixed in the two sliding grooves (13). The two second clamping blocks (11) are respectively slidably arranged in the two sliding grooves (13). The two second clamping blocks (11) are located between the two first clamping blocks (9). Between the clamping blocks (9), the two springs (12) are respectively sleeved on the two guide rods (10) and the two ends of the springs (12) are respectively fixed to the inner wall of the slide groove (13) and the second clamping block (11), and the clamping ends of the two second clamping blocks (11) and the two first clamping blocks (9) are provided with matching clamping teeth (14). A pushing assembly is also included. The pushing assembly is provided between the two second clamping blocks (11) and is used to transmit the pushing force to one of the second clamping blocks (11) and / or the other second clamping block (11).

3. The massage chair according to claim 2, characterized in that: The pushing assembly comprises two pushing blocks (15), a rotating shaft (16) and a T-shaped rotating block (17); a through slot (18) penetrating to the backrest (2) is provided on the seat plate (1); the two pushing blocks (15) are slidably arranged in the through slot (18) and the two pushing blocks (15) are used to push the two second clamping blocks (11) to be clamped with the two first clamping blocks (9) in a one-to-one manner; the rotating shaft (16) is rotatably arranged in the through slot (18); the rotating block (17) is fixed on the rotating shaft (16) and the rotating block (17) is used to push the two pushing blocks (15) to be abutted with the two second clamping blocks (11) in a one-to-one manner.

4. The massage chair according to claim 3, characterized in that: The second clamping block (11) is also provided with an annular abutting groove (19), and the pushing block (15) is rotatably provided with a plurality of balls (20), and the plurality of balls (20) are rollingly connected to the abutting groove (19).

5. The massage chair according to claim 3, characterized in that: A steering motor (21) is fixedly provided in the seat plate (1), an output end of the steering motor (21) is fixedly connected to one of the rotating shafts (16), a first sprocket (22) is fixedly provided on both rotating shafts (16), and a first chain (23) is sleeved on the two first sprockets (22).

6. The massage chair according to claim 1, characterized in that: A driving motor (24) is fixedly provided in one of the handrail frames (3), a second sprocket (25) is fixedly provided on the output end of the driving motor (24) and the driving shaft (4), and a second chain (26) is sleeved on the two second sprockets (25).

7. The massage chair according to claim 1, characterized in that: The rotating assembly comprises a driving gear (27), a driven gear (28), two rotating rods (29), two first cams (30) and a connecting rod (31); the driving gear (27) is fixed on the second driven shaft (6) and the two are coaxial; a support plate (32) is fixed in the backrest (2); the second driven shaft (6) is rotatably mounted on the support plate (32); the driven gear (28) is rotatably mounted on the support plate (32) and the driven gear (28) is connected to the driving gear (27) and the second driven shaft (6) is coaxially mounted on the backrest (2); The gears (27) are engaged, the two rotating rods (29) are rotatably arranged in the backrest (2) and are coaxial, the two first cams (30) are respectively fixed on the adjacent ends of the two rotating rods (29), a connecting block (33) is fixed between the two first cams (30), one end of the connecting rod (31) is rotatably arranged on the driven gear (28), and the other end is rotatably arranged on the connecting block (33), and the two ends of the massage rod (7) are respectively fixed on the two rotating rods (29).

8. The massage chair according to claim 2, characterized in that: The ends of the two first driven shafts (5) away from the first clamping block (9) are both fixedly provided with a first bevel gear (34); the two armrest frames (3) are both rotatably provided with mounting rods (35); the ends of the two mounting rods (35) are both fixedly provided with a second bevel gear (36); the two second bevel gears (36) are respectively engaged with the two first bevel gears (34); and the two mounting rods (35) are respectively used to drive the two moving assemblies.

9. The massage chair according to claim 8, characterized in that: The massage strip (8) includes two first racks (37) and a plurality of massage balls (38), the two first racks (37) are both slidably arranged in the armrest frame (3), the plurality of massage balls (38) are respectively rotatably arranged on the two first racks (37) and the massage balls (38) are oriented toward the top of the armrest frame (3), the moving assembly includes a second cam (39), a driving block (40), a guide bar (41) and a first gear (42), the second cam (39) is fixed on the end of the mounting rod (35) away from the second bevel gear (36), the driving block (40) is rotatably arranged on the second cam (39), the guide bar (41) is fixed on one of the first racks (37) and a guide groove (43) is provided on the guide bar (41), the driving block (40) is slidably arranged in the guide groove (43), the first gear (42) is rotatably arranged in the armrest frame (3) and the first gear (42) is respectively engaged with the two first racks (37).

10. The massage chair according to claim 9, characterized in that: A second rack (44) is provided above the two first racks (37), the two second gears (45) are fixedly connected to the armrest frame (3), a plurality of the massage balls (38) are fixedly provided with a second gear (45), and the plurality of the second gears (45) are respectively engaged with the two second racks (44).

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