Compound law motion slow rocking device and massage chair

Abstract

A composite rhythmic slow rocking device and massage chair include a first rocking component and a second rocking component. The output ends of the first and second rocking components are respectively connected to the two ends of a platform, and the axis of the output end of the first rocking component forms a first axis, while the axis of the output end of the second rocking component forms a second axis. The first and second rocking components can be controlled independently or collaboratively to achieve various movement modes such as slow rocking, rhythmic rocking, and composite rocking, meeting users' needs for diverse relaxation experiences and solving the problem of poor experience caused by single function or complex structure in existing technologies. In addition, the design of the first and second rocking components as mutual rotation fulcrums eliminates the need for separate support mechanisms for each movement mode, simplifying the overall mechanical structure and reducing manufacturing difficulty and cost.

Description

Technical Field

[0001] This invention relates to the field of massage device technology, and in particular to a composite rhythmic slow rocking device and a massage chair. Background Technology

[0002] With the improvement of people's living standards, the pursuit of health and comfort is increasing. Massage chairs, as a home appliance that provides a comfortable massage experience, have been widely used in homes, offices, and health management centers. Existing massage chairs mainly focus on simulating the mechanical movements of human hand massage, such as kneading, tapping, and vibration. Some high-end products also introduce single motion modes to aid relaxation. Among these, rhythmic motion simulates the natural movement of the human body through rhythmic up-and-down, left-and-right, or forward-and-backward movements; slow rocking simulates the cradle effect through gentle swaying motions to aid relaxation. In existing technologies, solutions to achieve these effects typically include using a four-bar linkage to drive the platform for vertical up-and-down movement to achieve rhythmic motion, or using a worm gear reduction structure combined with an eccentric mechanism to drive the seat for slow rocking.

[0003] Most massage chairs currently on the market have a single function. They can only provide rhythmic motion or only have a slow rocking mode. They cannot switch or combine these two distinct motion modes, which limits the effectiveness of massage chairs in providing a diverse relaxation experience. Summary of the Invention

[0004] This invention provides a composite rhythmic slow rocking device and massage chair, aiming to solve the technical problem that existing massage chairs can only achieve a single rhythmic or slow rocking effect, lacking a technical solution to organically combine the two movement modes, and thus failing to meet users' needs for a diverse relaxation experience.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A composite rhythmic slow rocking device includes a base and a platform. The base is provided with a first rocking component and a second rocking component. The output end of the first rocking component is driven to a first end of the platform, and the axis of the output end of the first rocking component constitutes a first axis. The output end of the second rocking component is driven to a second end of the platform, and the axis of the output end of the second rocking component constitutes a second axis. The first rocking component and / or the second rocking component drive the platform to move.

[0007] When the first rocking component drives the platform, the platform performs a first rocking motion around the second axis; when the second rocking component drives the platform, the platform performs a second rocking motion around the first axis; when the first rocking component and the second rocking component drive the platform simultaneously, the platform performs a compound rocking motion.

[0008] Furthermore, the first rocking component causes the platform to rock more violently than the second rocking component.

[0009] Furthermore, the first rocking component drives the platform to rock at a speed that is less than the second rocking component drives the platform to rock at a speed that is less than the second rocking component.

[0010] Furthermore, the first rocking assembly includes a first drive shaft and rocking rods fixedly connected to both ends of the first drive shaft. The first drive shaft is rotatably connected to the base, the end of the rocking rod away from the first drive shaft is rotatably connected to the transmission rod, and the end of the transmission rod away from the rocking rod is rotatably connected to the platform. The axis of rotation of the transmission rod around the rocking rod constitutes the first axis.

[0011] Furthermore, the second rocking assembly includes a second drive shaft and eccentric shafts located at both ends of the second drive shaft. The second drive shaft is rotatably connected to the base. The axis of the eccentric shaft and the axis of the second drive shaft are not coaxial. The eccentric shaft is rotatably connected to the platform, and the axis of the eccentric shaft constitutes the second axis.

[0012] Furthermore, the distance between the axis of the first drive shaft and the first axis is greater than the distance between the axis of the second drive shaft and the second axis.

[0013] Furthermore, the first rocking assembly also includes a first driving device, which is driven to the first drive shaft; the second rocking assembly also includes a second driving device, which is driven to the second drive shaft; or, it also includes a dual-head drive motor, whose two output ends are driven to the first drive shaft and the second drive shaft, respectively.

[0014] Furthermore, the first drive device includes a first motor and a reducer set, the input end of the reducer set is connected to the output end of the first motor, and the output end of the reducer set is drivenly connected to the first drive shaft;

[0015] The speed reducer unit includes several synchronous pulleys and a synchronous belt, which connects the synchronous pulleys in a manner with a transmission ratio greater than 1.

[0016] Furthermore, the base is provided with a first bearing and a second bearing, the two ends of the first drive shaft are connected to the inner ring of the first bearing, the two ends of the second drive shaft are connected to the inner ring of the second bearing, and the platform is provided with a third bearing, with an eccentric shaft connected to the inner ring of the third bearing.

[0017] A massage chair includes a chair frame and a compound rhythmic rocking device as described above. The chair frame is connected to a platform to drive the chair frame to perform a first rocking motion, a second rocking motion, or a compound rocking motion.

[0018] The beneficial effects of this invention are:

[0019] 1. This invention proposes a composite rhythmic slow rocking device, comprising a first rocking component and a second rocking component. The output ends of the first and second rocking components are respectively connected to the two ends of a platform, and the axis of the output end of the first rocking component forms a first axis and a second axis. The first and second rocking components can be controlled independently or collaboratively to achieve various movement modes such as slow rocking, rhythmic rocking, and composite rocking, meeting users' needs for diverse relaxation experiences and solving the problem of poor experience caused by single function or complex structure in existing technologies. Furthermore, the design of the first and second rocking components as mutual rotation fulcrums eliminates the need for separate support mechanisms for each movement mode, simplifying the overall mechanical structure and reducing manufacturing difficulty and cost.

[0020] 2. The composite rhythmic slow rocking device proposed in this invention adopts a reducer group composed of several synchronous pulleys and synchronous belts. It utilizes the flexible buffering characteristics of synchronous belt transmission to absorb the vibration and impact during motor operation and mechanical transmission, avoiding motion jamming caused by machining accuracy errors or wear in traditional rigid transmission structures such as worm gears. At the same time, the multi-stage pulley combination can achieve a large reduction ratio within a limited space layout, reducing the stringent requirements on the manufacturing accuracy of individual structural components. Thus, while ensuring the smooth low-speed output of the first drive shaft to drive the platform for slow rocking motion, it improves the smoothness of device operation and user comfort. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a composite rhythmic slow rocking device according to the present invention;

[0023] Figure 2 This is one of the exploded views of a composite rhythmic slow rocking device according to the present invention;

[0024] Figure 3 This is a second exploded view of a composite rhythmic slow rocking device according to the present invention;

[0025] Figure 4 for Figure 3 Enlarged view of a portion of point A in the middle;

[0026] Figure 5 for Figure 3 Enlarged view of a section at point B in the middle;

[0027] Figure 6 This is a schematic diagram of the speed reducer unit of a composite rhythmic slow rocking device according to the present invention;

[0028] Figure 7 This is an exploded view of the speed reducer unit of a composite rhythmic slow rocking device according to the present invention;

[0029] Figure 8 This is a schematic diagram of the first swing motion position point of a composite rhythmic slow rocking device according to the present invention;

[0030] Figure 9 This is a schematic diagram of the first swing motion position point two of a composite rhythmic slow rocking device of the present invention;

[0031] Figure 10 This is a schematic diagram of the first swing motion position point three of a composite rhythmic slow rocking device of the present invention;

[0032] Figure 11 This is a schematic diagram of the first swing motion position point four of a composite rhythmic slow rocking device of the present invention;

[0033] Figure 12 This is a high-level schematic diagram of the second swing motion of a composite rhythmic slow rocking device according to the present invention;

[0034] Figure 13 This is a low-position schematic diagram of the second swing motion of a composite rhythmic slow rocking device according to the present invention;

[0035] Figure 14 This is a schematic diagram of a massage chair according to the present invention;

[0036] Figure 15 This is an exploded view of a massage chair according to the present invention;

[0037] In the diagram, 10 is the base; 20 is the platform; 301 is the first drive shaft; 3011 is the first pulley; 302 is the swing arm; 303 is the first drive unit; 3031 is the first motor; 3032 is the reducer; 30321 is the synchronous pulley; 30322 is the synchronous belt; 401 is the second drive shaft; 4011 is the second pulley; 402 is the eccentric shaft; 403 is the second drive unit; 50 is the transmission rod; 601 is the first bearing; 602 is the second bearing; 603 is the third bearing; 70 is the first axis; 80 is the second axis; 90 is the fixed seat; 100 is the rotating shaft; 110 is the massage chair; and 120 is the chair frame. Detailed Implementation

[0038] The following is combined Figures 1 to 15 The present invention will be described in detail below.

[0039] This embodiment provides a compound rhythmic slow rocking device, including a base 10 and a platform 20. The base 10 is provided with a first rocking component and a second rocking component. The output end of the first rocking component is driven to a first end of the platform 20, and the axis of the output end of the first rocking component forms a first axis 70. The output end of the second rocking component is driven to a second end of the platform 20, and the axis of the output end of the second rocking component forms a second axis 80. The first rocking component and / or the second rocking component drive the platform 20 to move. When the first rocking component drives the platform 20, the platform 20 performs a first rocking motion around the second axis 80. When the second rocking component drives the platform 20, the platform 20 performs a second rocking motion around the first axis 70. When the first rocking component and the second rocking component drive the platform 20 simultaneously, the platform 20 performs a compound rocking motion.

[0040] The first rocking assembly refers to the drive unit used to drive the platform 20 to perform a slow rocking motion. The output end of the first rocking assembly is connected to the first end of the platform 20, and the center of its output end is defined as the first axis 70. The first rocking assembly is not only responsible for providing the driving force for the platform 20 to perform the first rocking motion (i.e., slow rocking motion), but the axis of its output end (i.e., the first axis 70) also serves as the rotation fulcrum when the second rocking assembly drives the platform 20 to move, so that the first rocking assembly has the dual function of a drive source and a rotation pivot.

[0041] The second rocking assembly refers to the drive unit used to drive the platform 20 to perform rhythmic motion. The output end of the second rocking assembly is connected to the second end of the platform 20, and the center of its output end is defined as the second axis 80. Similarly, the second rocking assembly is not only responsible for providing the driving force for the platform 20 to perform the second rocking motion (i.e., rhythmic motion), but the axis of its output end (i.e., the second axis 80) also serves as the rotation fulcrum when the first rocking assembly drives the platform 20 to move, so that the second rocking assembly has the dual function of a drive source and a rotation pivot.

[0042] When the first rocking component is driven alone, the platform 20 performs a first rocking motion (e.g., slow rocking) centered on the second axis 80; when the second rocking component is driven alone, the platform 20 performs a second rocking motion (e.g., rhythmic) centered on the first axis 70; when both are driven simultaneously, the two motion vectors are superimposed, causing the platform 20 to perform a compound rocking motion, thereby simulating a more complex natural motion trajectory.

[0043] If the first swing motion mode is selected, the first swing component starts working, outputting power to drive the first end of platform 20 to move. At this time, the second swing component is in the off state and provides rotational support. Platform 20 swings around the second axis 80. The first end of platform 20 is located at position one (e.g., Figure 8 (As shown) Swing to position point two (as shown) Figure 9 As shown), until it swings to position point three (as shown). Figure 10 As shown), the first end of platform 20 completes its upward journey from a low position to a high position; then, the first end of platform 20 descends from the high position to position point four (as shown). Figure 11 (As shown), then continue descending back to position one, completing the descent from high to low.

[0044] If the second swing motion mode is selected, the second swing component outputs power, the first swing component is in the off state and provides rotational support, and the platform 20 swings around the first axis 70, causing the second end of the platform 20 to reciprocate between a low position and a high position. Figure 12 and Figure 13 As shown. If the compound rocking mode is selected, the first rocking component and the second rocking component are activated simultaneously, and the two ends of the platform 20 move around the first axis 70 and the second axis 80 respectively, thereby producing a compound rocking effect of slow rocking and rhythmic rocking.

[0045] In this embodiment, the first and second rocking components can be controlled independently or collaboratively to achieve various movement modes such as slow rocking, rhythmic rocking, and compound rocking, meeting users' needs for diverse relaxation experiences and solving the problem of poor experience caused by single function or complex structure in existing technologies. Furthermore, the design of the first and second rocking components as mutual rotation fulcrums eliminates the need for separate support mechanisms for each movement mode, simplifying the overall mechanical structure and reducing manufacturing difficulty and cost.

[0046] The first rocking component causes the platform 20 to rock with a greater amplitude than the second rocking component. The first rocking component is configured to provide a larger range of motion to simulate a cradle-like, large-amplitude rocking motion, thereby meeting the user's need for deep relaxation. The second rocking component is configured to provide a smaller range of motion to simulate a small rhythmic or vibratory effect, designed to promote blood circulation and muscle stimulation.

[0047] When the first rocking component is driven alone, the platform 20 performs large-angle reciprocating oscillations. In this case, the first rocking component acts as the driving unit, and its large output amplitude allows the platform 20 to tilt or rise and fall over a wide range, creating a soothing, slow rocking experience. When the second rocking component is driven alone, its smaller output amplitude allows the platform 20 to perform rapid reciprocating motions within a small range, creating a rhythmic experience. When the two components work together, the large-amplitude slow rocking motion serves as the background, superimposed with small-amplitude rhythmic motion, allowing the platform 20 to maintain a wide range of posture changes while simultaneously incorporating high-frequency micro-vibrations.

[0048] The first rocking component drives the platform 20 to rock at a lower speed than the second rocking component. This means that when the first rocking component drives the platform 20, the rotational speed at its output end is configured to a lower value, while when the second rocking component drives the platform 20, the rotational speed at its output end is configured to a relatively higher value. Through the differentiated setting of the speed parameters, the platform 20 can respectively exhibit a gentle, slow rocking state and an active, rhythmic state.

[0049] like Figure 3 and Figure 4 As shown, the first rocking assembly includes a first drive shaft 301 and a rocker arm 302 fixedly connected to both ends of the first drive shaft 301. The first drive shaft 301 is rotatably connected to the base 10. The end of the rocker arm 302 away from the first drive shaft 301 is rotatably connected to the drive rod 50. The end of the drive rod 50 away from the rocker arm 302 is rotatably connected to the platform 20. The axis of rotation of the drive rod 50 around the rocker arm 302 constitutes the first axis 70.

[0050] The rocker arm 302 refers to the structure fixedly connected to both ends of the first drive shaft 301 and rotating synchronously with it. The connection method between the rocker arm 302 and the first drive shaft 301 can be welding, keying, or interference fit, as long as synchronous rotation is ensured. The length of the rocker arm 302 determines the swing amplitude of the platform 20 in the first rocking motion. The length of the rocker arm 302 is as follows: Figure 4 As shown in L1, the function of the transmission rod 50 is to transmit the driving force of the swing arm 302 to the platform 20.

[0051] When the first drive shaft 301 rotates, the rocker arms 302 at both ends of the first drive shaft 301 move in a circular motion. The free end of the rocker arm 302 pushes the drive rod 50 to move. Since the other end of the drive rod 50 is connected to the platform 20, the drive rod 50 forces the platform 20 to oscillate back and forth around the second axis 80, thus converting the continuous rotational motion of the first drive shaft 301 into a large-angle, slow-speed oscillating motion of the platform 20.

[0052] like Figure 3 and Figure 5 As shown, the second rocking assembly includes a second drive shaft 401 and eccentric shafts 402 disposed at both ends of the second drive shaft 401. The second drive shaft 401 is rotatably connected to the base 10. The axis of the eccentric shaft 402 and the axis of the second drive shaft 401 are not coaxial. The eccentric shaft 402 is rotatably connected to the platform 20. The axis of the eccentric shaft 402 constitutes the second axis 80.

[0053] Eccentric shaft 402 refers to a shaft segment whose axis does not coincide with the axis of the second transmission shaft 401. Because the axis of eccentric shaft 402 is not coaxial with the axis of the second transmission shaft 401, when the second transmission shaft 401 rotates, the outer circumferential surface of eccentric shaft 402 will experience periodic radial displacement relative to the centerline of the second transmission shaft 401. The distance between the axis of eccentric shaft 402 (second axis 80) and the axis of the second transmission shaft 401 determines the swing amplitude of the platform 20 in its second rocking motion. This distance is as follows: Figure 5 As shown in L2.

[0054] Therefore, the distance between the axis of the first drive shaft 301 and the first axis 70 is greater than the distance between the axis of the second drive shaft 401 and the second axis 80, i.e., L1 > L2, to ensure that the swing amplitude of the platform 20 driven by the first swing assembly is greater than the swing amplitude of the platform 20 driven by the second swing assembly.

[0055] The first rocking assembly further includes a first drive device 303, which is driven to the first drive shaft 301. The second rocking assembly further includes a second drive device 403, which is driven to the second drive shaft 401. The second drive device 403 and the first drive device 303 are independent of each other, so that the two rocking assemblies can be controlled separately, thereby realizing the single motion or combined motion of the platform 20.

[0056] In other embodiments, the composite rhythmic slow rocking device further includes a dual-head drive motor, whose two output ends are respectively connected to the first drive shaft 301 and the second drive shaft 401. The dual-head drive motor refers to an electric motor with two independent output shafts or one output shaft with power ends extending from both ends; its function is to serve as an integrated power source, simultaneously providing driving force to both the first and second rocking components.

[0057] The first drive unit 303 includes a first motor 3031 and a reducer unit 3032. The input end of the reducer unit 3032 is connected to the output end of the first motor 3031, and the output end of the reducer unit 3032 is drively connected to the first drive shaft 301. Figure 1 and Figure 2 As shown, a first pulley 3011 is provided in the middle of the first drive shaft 301. The output end of the reducer unit 3032 is connected to the first pulley 3011 via belt drive to drive the first drive shaft 301 to rotate. Similarly, as... Figure 1 and Figure 2 As shown, a second pulley 4011 is provided in the middle of the second drive shaft 401, and the output end of the second drive device 403 is connected to the second pulley 4011 through belt drive to drive the second drive shaft 401 to rotate.

[0058] The speed reducer 3032 is a speed-changing transmission module installed between the first motor 3031 and the first drive shaft 301. Its main function is to reduce the high speed output by the first motor 3031 to a low speed suitable for slow rocking motion, while increasing the output torque. The input end of the speed reducer 3032 is connected to the output end of the first motor 3031, and its output end is driven to the first drive shaft 301, forming an intermediate transmission link from the power source to the actuator. Through the speed reduction and torque increase effect of the speed reducer 3032, the first drive shaft 301 can rotate smoothly at a lower speed, thereby driving the platform 20 to achieve a gentle slow rocking effect and avoiding the problems of excessive speed or insufficient torque caused by direct motor drive.

[0059] The reducer unit 3032 includes several synchronous pulleys 30321 and a synchronous belt 30322. A fixed seat 90 is provided on the base 10, and the fixed seat 90 has two rotating shafts 100. Each synchronous pulley 30321 is fitted onto its corresponding rotating shaft 100. The synchronous pulley 30321 is a wheel-shaped component with a toothed structure for meshing and transmission with the synchronous belt 30322. The synchronous belt 30322 can be an annular transmission belt with teeth on its inner surface matching the synchronous pulley 30321. The several synchronous pulleys 30321 are connected by the synchronous belt 30322 in a transmission ratio greater than 1. This means that the diameter of the driving pulley is smaller than the diameter of the driven pulley. This connection method allows power to be reduced in stages during transmission. Each stage of the synchronous pulley 30321 and the synchronous belt 30322 undertakes part of the reduction task, ultimately achieving the required low-speed, high-torque state at the output end.

[0060] This embodiment employs a reducer unit 3032 composed of several synchronous pulleys 30321 and synchronous belts 30322. The flexible buffering characteristics of the synchronous belts 30322 are used to absorb the vibration and impact during motor operation and mechanical transmission, avoiding motion jamming caused by machining accuracy errors or wear in traditional rigid transmission structures such as worm gears. At the same time, the multi-stage pulley combination can achieve a large reduction ratio within a limited space layout, reducing the stringent requirements on the manufacturing accuracy of individual structural components. Thus, while ensuring the smooth low-speed output of the first drive shaft 301 to drive the platform 20 in slow rocking motion, the smoothness of the device's operation and the user's comfort are improved.

[0061] The base 10 is provided with a first bearing 601 and a second bearing 602. The two ends of the first drive shaft 301 are connected to the inner ring of the first bearing 601, and the two ends of the second drive shaft 401 are connected to the inner ring of the second bearing 602. The platform 20 is provided with a third bearing 603, and the eccentric shaft 402 is connected to the inner ring of the third bearing 603. The function of each bearing is to reduce the friction between the two components.

[0062] This embodiment also provides a massage chair 110, including a chair frame 120 and a composite rhythmic rocking device as described in the above embodiment. The chair frame 120 is connected to the platform 20 to drive the chair frame 120 to perform a first rocking motion, a second rocking motion, or a composite rocking motion.

[0063] The chair frame 120 is a structural component used to support the user's body and form the main frame of the massage chair 110. It is fixedly connected to the platform 20 of the composite rhythmic slow rocking device, so that the chair frame 120 can reproduce the movement state of the platform 20. When the platform 20 performs a first rocking motion around the second axis 80 under the drive of the first rocking component, the chair frame 120 performs a first rocking motion along the same trajectory, simulating a slow rocking effect; when the platform 20 performs a second rocking motion around the first axis 70 under the drive of the second rocking component, the chair frame 120 performs a second rocking motion along the same trajectory, simulating a rhythmic effect; when both components are driven simultaneously, the chair frame 120 performs a composite rocking motion.

[0064] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand and implement the present invention. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A composite rhythmic slow rocking device, characterized in that, The system includes a base and a platform. The base is provided with a first rocking component and a second rocking component. The output end of the first rocking component is connected to a first end of the platform, and the axis of the output end of the first rocking component forms a first axis. The output end of the second rocking component is connected to a second end of the platform, and the axis of the output end of the second rocking component forms a second axis. The first rocking component and / or the second rocking component drive the platform to move. When the first rocking component drives the platform, the platform performs a first rocking motion around the second axis; when the second rocking component drives the platform, the platform performs a second rocking motion around the first axis; when the first rocking component and the second rocking component drive the platform simultaneously, the platform performs a compound rocking motion.

2. The composite rhythmic slow rocking device as described in claim 1, characterized in that, The first rocking component causes the platform to rock at a greater amplitude than the second rocking component causes the platform to rock at a greater amplitude.

3. The composite rhythmic slow rocking device as described in claim 1, characterized in that, The first rocking component drives the platform to rock at a speed less than the second rocking component drives the platform to rock at a speed less than the second rocking component.

4. A composite rhythmic slow rocking device as described in any one of claims 1-3, characterized in that, The first rocking assembly includes a first drive shaft and a rocker arm fixedly connected to both ends of the first drive shaft. The first drive shaft is rotatably connected to the base. The end of the rocker arm away from the first drive shaft is rotatably connected to a transmission rod. The end of the transmission rod away from the rocker arm is rotatably connected to the platform. The axis of rotation of the transmission rod around the rocker arm constitutes the first axis.

5. The composite rhythmic slow rocking device as described in claim 4, characterized in that, The second rocking assembly includes a second drive shaft and eccentric shafts disposed at both ends of the second drive shaft. The second drive shaft is rotatably connected to the base. The axis of the eccentric shaft and the axis of the second drive shaft are not coaxial. The eccentric shaft is rotatably connected to the platform. The axis of the eccentric shaft constitutes the second axis.

6. The composite rhythmic slow rocking device as described in claim 5, characterized in that, The distance between the axis of the first drive shaft and the first axis is greater than the distance between the axis of the second drive shaft and the second axis.

7. The composite rhythmic slow rocking device as described in claim 5, characterized in that, The first rocking assembly further includes a first driving device, which is driven to the first drive shaft; the second rocking assembly further includes a second driving device, which is driven to the second drive shaft; or, it further includes a dual-head drive motor, the two output ends of which are driven to the first drive shaft and the second drive shaft, respectively.

8. The composite rhythmic slow rocking device as described in claim 7, characterized in that, The first driving device includes a first motor and a reducer assembly. The input end of the reducer assembly is connected to the output end of the first motor, and the output end of the reducer assembly is drivenly connected to the first drive shaft. The speed reducer unit includes several synchronous pulleys and a synchronous belt, and the synchronous pulleys are connected by the synchronous belt in such a way that the transmission ratio is greater than 1.

9. A composite rhythmic slow rocking device as described in claim 5, characterized in that, The base is provided with a first bearing and a second bearing. The two ends of the first drive shaft are connected to the inner ring of the first bearing, and the two ends of the second drive shaft are connected to the inner ring of the second bearing. The platform is provided with a third bearing, and the eccentric shaft is connected to the inner ring of the third bearing.

10. A massage chair, comprising a chair frame, characterized in that, It also includes a composite rhythmic rocking device as described in any one of claims 1-9, wherein the chair frame is connected to the platform to drive the chair frame to perform a first rocking motion, a second rocking motion, or a composite rocking motion.

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