Internal transmission structure of massage chair

Abstract

An internal transmission structure of a massage chair is used for solving the technical problems that in the prior art, a massage chair in the prior art cannot enable a massage machine core to move left and right in a reciprocating mode, and only when a user adjusts the sitting posture, a massage structure can massage the portion, needing to be massaged, of the user. A screw and a guide rod are arranged on the chair back frame, a moving plate is arranged on the chair back frame, the moving plate is in threaded connection with the screw and is in sliding connection with the guide rod, a mounting frame is arranged on the moving plate, a first spline shaft is arranged on the mounting frame, and a first driving assembly used for driving the first spline shaft to rotate along with movement of the moving plate is arranged on the chair back frame. Two massage assemblies used for massaging the back of the human body are arranged on the mounting frame, two second driving assemblies used for driving the two massage assemblies respectively are arranged on the first spline shaft, and a third driving assembly used for driving the two massage assemblies to move in a reciprocating mode is arranged on the moving plate. And a fourth driving assembly for driving the third driving assembly is arranged on the first spline shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of massage chairs, and in particular to an internal transmission structure of a massage chair. Background Art

[0002] Massage chairs can imitate human hands to massage the back, waist, buttocks and other parts of the body. They can help eliminate physical fatigue and restore spirit. People can enjoy massage at home, so they are loved by many people.

[0003] The massage chair of the prior art, such as the invention patent document with authorization announcement number "CN222942634U" and patent name "A Full Body Massage Chair", discloses a massage chair, in which a plurality of electric massage units are fixedly installed on the seat cushion and backrest of the massage chair. The electric massage unit includes a shell, and a motor is installed on the outside of the shell. The motor drives a turntable on the upper end surface of the shell to rotate through a transmission mechanism inside the shell, and a massage ball is provided on the turntable.

[0004] The above patent cannot make the massage mechanism move back and forth left and right when the massage structure moves up and down, and cannot satisfy the user's need to massage other parts of the body when the massage structure moves. The user needs to adjust his sitting posture so that the massage structure can massage the part that the user needs to massage, which is very inconvenient. Summary of the Invention

[0005] The purpose of the present invention is to address the deficiencies of the existing technology and propose an internal transmission structure for a massage chair, which is used to solve the technical problem mentioned in the background technology that the massage chair in the existing technology cannot make the massage mechanism move back and forth left and right when the massage structure moves up and down, and cannot meet the user's need to massage other parts of the body when the massage structure moves. The user needs to adjust his sitting posture so that the massage structure can massage the part that the user needs to massage, which is very inconvenient.

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

[0007] A massage chair internal transmission structure includes a seat back frame, a screw and a guide rod are respectively provided on both sides of the seat back frame, a movable plate is slidably provided on the seat back frame, one end of the movable plate is threadedly connected to the screw, and the other end is slidably connected to the guide rod, a mounting frame is fixed to the movable plate, a first spline shaft is rotatably provided on the mounting frame, a first drive assembly is provided on the seat back frame for driving the first spline shaft to rotate as the movable plate moves, two massage assemblies for massaging the human back are provided on the mounting frame, two second drive assemblies for respectively driving the two massage assemblies are provided on the first spline shaft, a third drive assembly for driving the two massage assemblies to reciprocate is provided on the movable plate, and a fourth drive assembly is provided on the first spline shaft for driving the third drive assembly as the first spline shaft rotates.

[0008] Working principle:

[0009] When an external power source (such as a motor) drives the screw to rotate, one end of the movable plate threadedly connected to the screw is displaced by the meshing action of the thread, and at the same time, the other end of the movable plate is slidably connected to the guide rod, and the guide rod provides linear constraints to ensure that the movable plate slides smoothly along the preset trajectory of the chair back frame. The movement of the movable plate triggers the operation of the first drive component, so that the first drive component converts the linear motion of the movable plate into the rotational motion of the first spline shaft. The rotational motion of the first spline shaft is transmitted to the two massage components respectively through the two second drive components thereon, and then the massage component can realize the massage operation on the human body. The rotation of the first spline shaft drives the fourth drive component, and the fourth drive component drives the third drive component. The third drive component can synchronously drive the two massage components to move laterally on the chair back frame when the massage component is working, thereby expanding the massage range of the massage component.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] First, a first driving assembly is provided, through which the linear displacement of the moving plate caused by the screw can be converted into the axial rotation of the first spline shaft.

[0012] Secondly, a second drive assembly is provided, through which the axial rotation generated by the first spline shaft can drive the massage assembly to work.

[0013] Third, a fourth drive assembly is provided, which can synchronously convert the axial rotation of the first spline shaft into the reciprocating driving force of the third drive assembly, so that the third drive assembly can drive the massage assembly to perform reciprocating linear motion in a direction parallel to the back of the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;

[0015] Figure 2 Schematic diagram of the assembly structure of the third drive assembly of the seat back frame;

[0016] Figure 3 for Figure 1 The enlarged cross-sectional structure diagram at point A in the middle;

[0017] Figure 4 for Figure 1 The enlarged cross-sectional structure diagram at point B in the middle;

[0018] Figure 5 for Figure 2 The enlarged cross-sectional structure diagram at point C in the middle;

[0019] Figure 6 It is a schematic diagram of the cross-sectional structure of the connecting rod and the second spline sleeve.

[0020] Explanation of the accompanying drawings: chair back frame 1, screw 2, guide rod 3, movable plate 4, mounting frame 5, first spline shaft 6, rack 7, first gear 8, toothed disc 9, second gear 10, third gear 11, connecting rod 12, massage head 13, guide rail 14, movable frame 15, first spline sleeve 16, first bevel gear 17, transmission shaft 18, second bevel gear 19, guide rod 20, first strip hole 21, first rotating shaft 22, rotating block 23, fixed rod 24, fixed frame 25, linkage block 26, second strip hole 27, second rotating shaft 28, sprocket 29, chain 30, third bevel gear 31, fourth bevel gear 32, third strip hole 33, second spline sleeve 34, abutment groove 35, ball 36. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0022] Example:

[0023] like Figure 1 and Figure 2As shown, an internal transmission structure of a massage chair includes a backrest frame 1, a screw 2 and a guide rod 3 are respectively provided on both sides of the backrest frame 1, a movable plate 4 is slidably provided on the backrest frame 1, one end of the movable plate 4 is threadedly connected to the screw 2, and the other end is slidably connected to the guide rod 3, a mounting frame 5 is fixed on the movable plate 4, a first spline shaft 6 is rotatably provided on the mounting frame 5, and a first drive assembly for driving the first spline shaft 6 to rotate as the movable plate 4 moves is provided on the backrest frame 1, the first drive assembly includes two racks 7 and two first gears 8, and the two racks 7 are respectively They are fixed on both sides of the chair back frame 1, and the two first gears 8 are fixed on both ends of the first spline shaft 6, and the two first gears 8 are respectively engaged with the two racks 7. The screw 2 is driven to rotate by an external servo motor, and the movable plate 4 slides linearly along the guide rod 3 due to the threaded engagement, so that the movable plate 4 drives the mounting frame 5 to translate as a whole along the length direction of the chair back frame 1. The translation of the movable plate 4 drives the first spline shaft 6 to move synchronously, so that the first gears 8 at both ends of the first spline shaft 6 roll along the fixed rack 7, and the gears are driven by the reaction force of the rack 7 to drive the spline shaft to rotate.

[0024] like Figure 1 and Figure 3 As shown, the mounting frame 5 is provided with two massage components for massaging the back of the human body, and the massage components include a toothed disc 9 with a toothed inner wall, a second gear 10, three third gears 11, three connecting rods 12 and three massage heads 13. A guide rail 14 is fixed to the mounting frame 5, and the toothed disc 9 is slidably arranged on the guide rail 14. The second gear 10 is rotatably arranged on the toothed disc 9 and the two are coaxial. The three third gears 11 are all located in the toothed disc 9 and the three third gears 11 are respectively engaged with the inner wall of the toothed disc 9 and the second gear 10. The three connecting rods 12 are respectively provided on the three third gears 11 and the two are coaxial. The three massage heads 13 are respectively fixed on the three connecting rods 12. The second gear 10 rotates, driving the three third gears 11 to revolve around it. The third gear 11 engages with the inner teeth of the toothed disc 9 and rotates, so that the connecting rod 12 drives the massage heads 13 to perform planetary motion.

[0025] like Figure 1 and Figure 3 and Figure 6 As shown, the three third gears 11 are all fixed with a second spline sleeve 34 at the axis center, the three connecting rods 12 are spline structures near the third gear 11 and are spline-connected with the three spline sleeves respectively. A circular wavy abutment groove 35 is provided in the toothed disc 9, and the three connecting rods 12 are rotatably provided with balls 36 at the ends away from the massage head 13. The three balls 36 are rolled in the abutment groove 35, and the balls 36 at the end of the connecting rod 12 roll along the wavy abutment groove 35, thereby forcing the connecting rod 12 to axially expand and contract in the spline sleeve, and then the massage head 13 outputs a combined kneading and pressing action.

[0026] like Figure 1 and Figure 4As shown, the first spline shaft 6 is provided with two second drive assemblies for respectively driving the two massage assemblies. The second drive assembly includes a moving frame 15, a first spline sleeve 16, a first bevel gear 17, a transmission shaft 18 and a second bevel gear 19. A guide rod 20 is fixed on the moving plate 4. The moving frame 15 is slidably arranged on the guide rod 20. The first spline sleeve 16 is sleeved on the first spline shaft 6 and the first spline sleeve 16 is rotatably arranged on the moving frame 15. The first bevel gear 17 is fixed on the first spline shaft 6. A first strip hole 21 is opened on the mounting frame 5. The transmission shaft 18 is rotatably arranged on the mobile frame 15 and the transmission shaft 18 slides through the first strip hole 21 and the axis of the toothed disc 9 and is fixed to the second gear 10. The second bevel gear 19 is fixed to the end of the transmission shaft 18 away from the second gear 10 and the second bevel gear 19 is meshed with the first bevel gear 17. The first spline shaft 6 rotates and drives the second bevel gear 19 through the first bevel gear 17. The transmission shaft 18 drives the second gear 10 to rotate. The first strip hole 21 allows the transmission shaft 18 to slide axially when the mobile frame 15 is displaced, and the spline sleeve ensures that the rotational power of the spline shaft is continuously transmitted.

[0027] like Figure 1 and Figure 2 and Figure 5 As shown, the movable plate 4 is provided with a third driving assembly for driving the two massage components to reciprocate, and the third driving assembly includes a first rotating shaft 22, a rotating block 23, a fixed rod 24, two fixed frames 25 and a linkage block 26. The first rotating shaft 22 is rotatably arranged on the side of the movable plate 4 away from the massage head 13, the rotating block 23 is fixed on the first rotating shaft 22, the fixed rod 24 is fixed on the rotating block 23, the two fixed frames 25 are respectively fixed on the two movable frames 15, and the linkage block 26 is fixed between the two fixed frames 25. A second strip hole 27 is opened on the linkage block 26, and the fixed rod 24 is slidably arranged in the second strip hole 27. The fixed rod 24 moves in a circle with the rotating block 23 and slides back and forth in the second strip hole 27, pushing the linkage block 26 to drive the fixed frame 25, and the fixed frame 25 drives the movable frame 15 to move along the guide rod 20, thereby expanding the massage range of the massage assembly.

[0028] like Figure 2 and Figure 5As shown, the first spline shaft 6 is provided with a fourth drive assembly for driving the third drive assembly as the first spline shaft 6 rotates. The fourth drive assembly includes a second rotating shaft 28, two sprockets 29, a chain 30, a third bevel gear 31 and a fourth bevel gear 32. The second rotating shaft 28 is rotatably arranged on the movable plate 4. The movable plate 4 is provided with a third bar hole 33. The two sprockets 29 are respectively fixed to the first spline shaft 6 and the end of the second rotating shaft 28. The chain 30 is sleeved on the two sprockets 29 through the third bar hole 33. The third bevel gear 31 is fixed on the second rotating shaft 28 away from the end of the sprocket 29. The fourth bevel gear 32 is fixed on the first rotating shaft 22, and the fourth bevel gear 32 is meshed with the third bevel gear. The first spline shaft 6 rotates and drives the second rotating shaft 28 through the sprocket 29 and the chain 30. The third bevel gear 31 meshes with the fourth bevel gear 32, thereby driving the first rotating shaft 22 to drive the rotating block 23 to rotate.

[0029] Working principle:

[0030] Start the external servo motor to rotate forward, drive the screw 2 to rotate, and push the movable plate 4 to move linearly along the guide rod 3 through threaded engagement. When the movable plate 4 is displaced, the first gear 8 fixed thereto rolls along the fixed rack 7 of the chair back frame 1, forcibly driving the first spline shaft 6 to rotate. The first spline shaft 6 engages the second bevel gear 19 through the first bevel gear 17, and drives the second gear 10 to rotate through the transmission shaft 18, driving the three third gears 11 to revolve and rotate in the toothed disc 9. At the same time, the ball 36 at the end of the connecting rod 12 rolls along the wavy abutment groove 35 of the toothed disc 9, forcing the massage head 13 to axially extend and retract, outputting a deep pressing and kneading action.

[0031] The spline shaft drives the second rotating shaft 28 through the sprocket 29 and the chain 30, and engages the fourth bevel gear 32 through the third bevel gear 31, driving the rotating block 23 on the first rotating shaft 22 to rotate, and the fixed rod 24 on the rotating block 23 slides in the second bar hole 27 of the linkage block 26, pushing the movable frame 15 to move along the guide rod 20. Finally, the vertical displacement of the movable plate 4, the rotation and revolution of the massage head 13 plus the axial extension and contraction of the massage head 13, and the lateral displacement of the massage head 13 along the movable plate 4 are synchronously driven by a single motor, forming a three-dimensional composite massage action under the coupling of the mechanical structure. It should be noted that when the movable plate 4 is about to move to the end of the length direction of the chair back frame 1, the external servo motor is reversed, and the reciprocating linear motion of the movable plate 4 in the length direction of the chair back frame 1 can be realized.

[0032] 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. An internal transmission structure of a massage chair, characterized in that: The invention comprises a chair back frame (1), wherein screw rods (2) and guide rods (3) are respectively provided on both sides of the chair back frame (1), a movable plate (4) is slidably provided on the chair back frame (1), one end of the movable plate (4) is threadedly connected to the screw rod (2), and the other end is slidably connected to the guide rod (3), a mounting frame (5) is fixed on the movable plate (4), a first spline shaft (6) is rotatably provided on the mounting frame (5), a first driving component for driving the first spline shaft (6) to rotate as the movable plate (4) moves is provided on the chair back frame (1), two massage components for massaging the back of a human body are provided on the mounting frame (5), two second driving components for respectively driving the two massage components are provided on the first spline shaft (6), a third driving component for driving the two massage components to reciprocate is provided on the movable plate (4), and a fourth driving component for driving the third driving component as the first spline shaft (6) rotates is provided on the first spline shaft (6).

2. The internal transmission structure of a massage chair according to claim 1, characterized in that: The first driving assembly comprises two racks (7) and two first gears (8), the two racks (7) being fixed on both sides of the chair back frame (1), the two first gears (8) being fixed on both ends of the first spline shaft (6), and the two first gears (8) being meshed with the two racks (7) respectively.

3. The internal transmission structure of a massage chair according to claim 1, characterized in that: The massage component comprises a toothed disc (9) with a tooth groove formed on the inner wall, a second gear (10), three third gears (11), three connecting rods (12) and three massage heads (13); a guide rail (14) is fixed on the mounting frame (5); the toothed disc (9) is slidably arranged on the guide rail (14); the second gear (10) is rotatably arranged on the toothed disc (9) and the two are coaxial; the three third gears (11) are all located in the toothed disc (9) and the three third gears (11) are respectively engaged with the inner wall of the toothed disc (9) and the second gear (10); the three connecting rods (12) are respectively arranged on the three third gears (11) and the two are coaxial; the three massage heads (13) are respectively fixed on the three connecting rods (12).

4. The internal transmission structure of a massage chair according to claim 3, characterized in that: The second driving assembly comprises a moving frame (15), a first spline sleeve (16), a first bevel gear (17), a transmission shaft (18) and a second bevel gear (19); a guide rod (20) is fixed on the moving plate (4); the moving frame (15) is slidably mounted on the guide rod (20); the first spline sleeve (16) is sleeved on the first spline shaft (6) and the first spline sleeve (16) is rotatably mounted on the moving frame (15); the first bevel gear (17) is fixed The first spline shaft (6) is provided with a first strip hole (21) on the mounting frame (5), the transmission shaft (18) is rotatably provided on the moving frame (15), and the transmission shaft (18) slides through the first strip hole (21) and the axis of the toothed disc (9) and is fixed to the second gear (10), the second bevel gear (19) is fixed to the end of the transmission shaft (18) away from the second gear (10), and the second bevel gear (19) and the first bevel gear (17) are meshed with each other.

5. The internal transmission structure of a massage chair according to claim 4, characterized in that: The third driving assembly comprises a first rotating shaft (22), a rotating block (23), a fixed rod (24), two fixed frames (25) and a linkage block (26); the first rotating shaft (22) is rotatably arranged on a side of the movable plate (4) away from the massage head (13); the rotating block (23) is fixed on the first rotating shaft (22); the fixed rod (24) is fixed on the rotating block (23); the two fixed frames (25) are respectively fixed on the two movable frames (15); the linkage block (26) is fixed between the two fixed frames (25); a second strip hole (27) is opened on the linkage block (26); the fixed rod (24) is slidably arranged in the second strip hole (27).

6. The internal transmission structure of a massage chair according to claim 5, characterized in that: The fourth driving assembly comprises a second rotating shaft (28), two sprockets (29), a chain (30), a third bevel gear (31) and a fourth bevel gear (32); the second rotating shaft (28) is rotatably arranged on the movable plate (4); a third strip hole (33) is opened on the movable plate (4); the two sprockets (29) are respectively fixed on the first spline shaft (6) and the end of the second rotating shaft (28); the chain (30) is sleeved on the two sprockets (29) through the third strip hole (33); the third bevel gear (31) is fixed on the end of the second rotating shaft (28) away from the sprocket (29); the fourth bevel gear (32) is fixed on the first rotating shaft (22), and the fourth bevel gear (32) is meshed with the third bevel gear.

7. The internal transmission structure of a massage chair according to claim 3, characterized in that: The three third gears (11) are all fixedly provided with a second spline sleeve (34) at their axis centers. The three connecting rods (12) are splined near the third gears (11) and are respectively spline-connected with the three spline sleeves. A circular wave-shaped abutment groove (35) is provided in the toothed disc (9). The ends of the three connecting rods (12) away from the massage head (13) are all rotatably provided with balls (36). The three balls (36) are rolled in the abutment groove (35).

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