Massage chair horizontal circumferential swing mechanism

Abstract

The massage chair horizontal circumferential swing mechanism comprises a base, a supporting turntable arranged on the base and used for carrying a user, and a deflection mechanism arranged on the base and used for driving the supporting turntable to swing in the circumferential direction, wherein the deflection mechanism comprises a rotating shaft and a deflection shaft which are in transmission connection with each other, and the supporting turntable is always in a fixed inclination angle between the axis of the rotating shaft and the axis of the swing range in the circumferential direction driven by the deflection shaft. The massage chair horizontal circumferential swing mechanism has the beneficial effects that: the supporting turntable is realized to have multidimensional compound motion in the horizontal plane through the arrangement of the deflection mechanism, and the limitation of the traditional single-axis sagittal plane swing is broken.

Description

Technical Field

[0001] This utility model relates to a rocking mechanism, and more particularly to a horizontal circumferential rocking mechanism for a massage chair. Background Technology

[0002] In existing massage chair technology, the longitudinal rocking function is mainly achieved by driving the backrest structure to tilt back and forth via an electric push rod. This function is commonly used in scenarios such as sleep aid and relaxation, and lumbar spine relief. When the user activates the rocking mode, the back support unit performs small-range forward and backward tilting movements at a fixed frequency, combined with built-in kneading and tapping massage programs, creating a cradle-like rhythmic experience. This mechanical structure typically uses a single motor driving two push rods in a synchronous control method. Several combinations of swing amplitude and speed parameters are preset through a central controller. After the user selects a preset mode via the armrest panel, the system executes the longitudinal reciprocating motion according to the predetermined program. This technical solution is common in home and commercial massage chair products, mainly serving the needs of users who need to relieve spinal pressure and improve blood circulation.

[0003] The existing technology has significant functional limitations: First, the longitudinal swing relies entirely on the backrest angle adjustment mechanism, and its swing trajectory is strictly limited to the range of single-axis movement in the sagittal plane, making it impossible to generate multi-dimensional composite movements such as horizontal plane rotation or coronal plane lateral swing; Second, the backrest angle adjustment and the swing function share the same drive unit, which means that users cannot independently adjust the backrest tilt angle while maintaining longitudinal swing, resulting in insufficient personalization and adaptability. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a horizontal circular rocking mechanism for a massage chair capable of circumferential rocking to improve massage comfort.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a horizontal circumferential rocking mechanism for a massage chair, comprising a base and a support turntable mounted on the base for supporting the user, and a deflection mechanism mounted on the base for driving the support turntable to swing circumferentially. The deflection mechanism comprises a rotating shaft and a deflection shaft that are connected to each other in a transmission manner. Under the drive of the deflection shaft, the axis of the swing range formed by the support turntable along the circumferential direction always forms a fixed tilt angle with the axis of the rotating shaft.

[0006] The beneficial effects of this invention are as follows: By setting up a deflection mechanism, multi-dimensional composite motion of the supporting turntable in the horizontal plane is achieved, breaking through the limitations of traditional single-axis sagittal plane oscillation. The transmission connection between the rotation axis and the deflection axis makes the mechanical transmission of the oscillation trajectory more stable and avoids motion interference. As a preferred method, the deflection axis can be connected to the rotation axis through a universal joint, allowing for a certain angular deviation compensation while maintaining coaxiality; or a planetary gear set can be used to achieve synchronous transmission between the rotation axis and the deflection axis, forming a stable eccentric motion output through the cooperation of the gear ring and planetary gears.

[0007] Furthermore, a transmission part is provided between the deflection shaft and the rotation shaft. The transmission part includes a first end face connected to the deflection shaft and a second end face connected to the rotation shaft. The center of the first end face is located on the axis of the deflection shaft, and the center of the second end face is located on the axis of the rotation shaft. The planes on which the first end face and the second end face are located have an inclination angle.

[0008] This technical solution optimizes the power transmission path of the rotating axial deflection shaft through an inclined end-face design. The non-coplanar arrangement of the first and second end faces enables the deflection shaft to achieve eccentric motion characteristics while ensuring the mechanical stability of the coaxial constraint. The transmission part can effectively distribute the radial load during the motion process and avoid shaft deformation. As a preferred embodiment, the first end face can be designed as an annular groove structure, with its inner wall sleeved with the deflection shaft to form a sliding pair, and the bottom surface of the groove forming a certain inclination angle with the second end face; or a bevel gear transmission pair can be used instead of the planar end face, and the axial deflection can be achieved through the gear meshing angle, and the tooth profile parameters of the bevel gear can optimize the power transmission efficiency. As another preferred embodiment, multiple bearings can be sleeved on the deflection shaft to form a transmission connection between the deflection shaft and the supporting turntable, and the bearings abut against the first end face, that is, the transmission part acts as the bearing load to distribute the pressure.

[0009] Furthermore, the deflection mechanism also includes a limiting member, which includes a fixed end fixed on the support turntable and a rotating end rotatably disposed on the fixed end. The base is provided with a limiting groove for placing the rotating end, and the limiting groove cooperates with the rotating end to restrict the rotating end from moving only along the width direction of the massage chair.

[0010] The unidirectional constraint design of the limiting groove provides necessary redundancy in degrees of freedom while ensuring motion accuracy. The sliding trajectory of the rotating end within the limiting groove and the stroke of the telescopic cylinder form kinematic complementarity, avoiding mechanical interference and ensuring stability during tilt angle adjustment. As a preferred approach, the limiting groove can be designed as an elongated hole structure, with its major axis parallel to the front-back direction of the massage chair, and the rotating end using a roller structure embedded in the elongated hole; alternatively, a polymer material sliding pad can be placed within the limiting groove, and a low-friction coefficient surface treatment can reduce the sliding resistance of the rotating end, while an anti-detachment flange structure can be added to ensure that the rotating end remains within the groove during tilting motion.

[0011] Furthermore, the supporting turntable includes a support frame and a turntable frame that can rotate relative to each other, the telescopic cylinder includes a cylinder body hinged to the turntable frame and a piston rod hinged to the support frame, and the deflection shaft and the fixed end are both disposed on the turntable frame.

[0012] This layered structural design achieves modular separation of motion functions. The relative rotation between the support frame and the turntable decouples the drive paths for circumferential oscillation and tilt adjustment, and the hinged piston rod effectively decomposes the torque generated by the combined motion. As a preferred approach, a double-row angular contact ball bearing can be installed between the support frame and the turntable, which can withstand axial loads while allowing for radial fine-tuning; alternatively, an annular guide rail can be installed on the bottom surface of the turntable, with a corresponding slider assembly at the bottom of the support frame, achieving low-resistance relative rotational motion through the guide rail pair.

[0013] Furthermore, a rotating shaft is fixedly installed on the support frame at a coaxial position, and a rotating cavity is provided on the turntable frame for each rotating shaft to be placed thereon. The support frame can rotate relative to the turntable frame about the two rotating shaft axes as axes.

[0014] The dual-shaft structure establishes a stable rotation axis reference, and the enclosed design of the rotating cavity enhances the load-bearing capacity of the kinematic pairs. A clearance fit is formed between the shaft and the rotating cavity, ensuring smooth movement while preventing wobbling. As a preferred option, a self-lubricating bushing can be installed at the end of the shaft, and the inner wall of the rotating cavity can be coated with a diamond-like carbon film; alternatively, a hydraulic bushing structure can be used, with damping grease injected into the rotating cavity to achieve active control of the movement speed through viscous resistance.

[0015] Furthermore, the deflection mechanism also includes a drive assembly, which includes a drive source and a transmission gear fixed to the rotating shaft. The drive source is used to drive the transmission gear to rotate.

[0016] Modular drive design improves system maintainability, and the module selection of transmission gears can balance torque output and noise control. As a preferred approach, the drive source can be a servo motor with an encoder, connected to the transmission gears via a harmonic reducer to achieve high positioning accuracy; or oil reservoirs can be created on the tooth surfaces of the transmission gears, combined with a polymer composite matrix, to form a self-lubricating gear pair to extend service life.

[0017] Furthermore, it also includes a position detection mechanism, which includes a transmitting end and a receiving end respectively disposed on the upper and lower sides of the transmission gear. The transmission gear is provided with a signal through hole for signal to pass through. When the transmitting end, the signal through hole and the receiving end are in a straight line, the deflection shaft drives the support turntable to be in a forward-facing state.

[0018] The photoelectric detection scheme enables non-contact position calibration. The diameter of the signal through-hole is designed to be 1.2-1.5 times the beam diameter to ensure detection reliability. As a preferred method, 3-5 signal through-holes can be evenly distributed around the circumference of the transmission gear, corresponding to different preset positions; or an infrared through-beam sensor combined with a reflective grating can be used to achieve higher-precision position feedback through changes in the brightness of the grating stripes. Attached Figure Description

[0019] Figure 1 This is an isometric view of an embodiment of the present utility model; Figure 2 This is an exploded view of an embodiment of the present utility model; Figure 3 This is an isometric view of the eccentric shaft in an embodiment of the present invention; Figure 4 This is a cross-sectional view of the eccentric shaft in an embodiment of the present invention; Figure 5 This is an anatomical diagram of the base and drive assembly according to an embodiment of the present utility model; Figure 6 This is a partial enlarged view of the position detection mechanism in an embodiment of this utility model; Figure 7 This is a schematic diagram showing the support frame facing forward in an embodiment of this utility model; Figure 8 This is a schematic diagram of the support frame facing backward in an embodiment of the present invention; Figure 9 This is a schematic diagram illustrating the state of the turntable swinging to the right in an embodiment of the present invention; Figure 10 This is a schematic diagram showing the state of the turntable swinging to the left in an embodiment of this utility model. Detailed Implementation

[0020] This utility model embodiment provides a horizontal circular rocking mechanism for a massage chair, as follows: Figure 1-10As shown: It includes a base 1, on which a supporting turntable 2 is provided for supporting the user. The supporting turntable 2 is composed of a support frame 21 and a turntable frame 22 that are rotatable from each other. The support frame 21 has a rotating shaft 211 on both sides, and the turntable frame 22 is provided with a rotating cavity 221 to accommodate the rotating shaft 211.

[0021] The base 1 is also equipped with a deflection mechanism 4, which includes a rotating shaft 41 and a deflection shaft 42 connected by a transmission part 43. The transmission part 43 has a first end face 431 connected to the deflection shaft 42 and a second end face 432 connected to the rotating shaft 41. The two planes form an inclined angle, causing the deflection shaft 42 to be in an eccentric state. This ensures that when the deflection shaft 42 drives the support turntable 2 to swing circumferentially, the swing range formed by the deflection shaft 42 always forms a fixed inclined angle with respect to the axis of the rotating shaft. This inclined angle is the inclined angle formed between the first end face 431 and the second end face 432. The deflection shaft 42 is fitted with a bearing 44 that abuts against the first end face 431, and the shaft end is fixedly connected to the turntable frame 22. The rotating shaft 41 is driven by a drive assembly 6, which includes a drive source 61 and a transmission gear 62 fixed to the rotating shaft 41.

[0022] The base 1 has a limiting member 5 on its side, with its fixed end 51 mounted on the turntable frame 22 and its rotating end 52 embedded in the limiting groove 11 of the base 1. The limiting groove 11 is designed to restrict the rotating end 52 from moving along the width direction only. When the telescopic cylinder 3 adjusts the tilt angle, the rotating end 52 can slide freely in the limiting groove 11 but will not come out.

[0023] A position detection mechanism 7, comprising a transmitter 71 and a receiver 72, is provided above and below the transmission gear 62. The transmission gear 62 has a signal through-hole 621. When the through-hole 621 is aligned with the transmitter 71 and the receiver 72, the support turntable 2 is in a forward-facing reference position. This status signal can be transmitted to the control system to ensure that when the machine stops, the support turntable 2 returns to a position convenient for the user to sit in when the transmitter 71, receiver 72, and signal through-hole 621 are aligned in a straight line.

[0024] A telescopic cylinder 3 is installed on the turntable frame 22. The telescopic cylinder 3 includes a cylinder body 31 hinged to the turntable frame 22 and a piston rod 32 hinged to the support frame 21. The tilt angle of the support frame 21 is changed by the extension and retraction of the piston rod 32.

[0025] The working principle is as follows: The drive source 61 drives the rotating shaft 41 to rotate through the transmission gear 62. The rotational motion is converted into the circumferential oscillation of the deflection shaft 42 by the inclined plane transmission of the transmission part 43. The rotation direction is limited by the limiting member 5, thereby driving the turntable frame 22 and the support frame 21 to make horizontal circumferential oscillation. When it is necessary to adjust the backrest angle, the telescopic cylinder 3 pushes the support frame 21 to rotate around the rotating shaft 211. At this time, the rotating end 52 of the limiting member 5 slides or moves up and down in the limiting groove 11, which ensures the oscillation freedom of the turntable frame 22 and prevents lateral deviation. The position detection mechanism 7 monitors the angle of the transmission gear 62 in real time and automatically calibrates the support turntable 2 to the forward-facing position when the machine stops. Figure 7 As shown.

[0026] The above embodiments are merely one preferred embodiment of the present utility model. Ordinary changes and substitutions made by those skilled in the art within the scope of the present utility model's technical solution are all included within the protection scope of the present utility model.

Claims

1. A horizontal circumferential rocking mechanism for a massage chair, comprising a base and a support turntable disposed on the base for supporting the user, characterized in that: It also includes a deflection mechanism mounted on the base for driving the support turntable to swing circumferentially. The deflection mechanism includes a rotating shaft and a deflection shaft that are connected to each other in a transmission manner. The axis of the swing range formed by the support turntable along the circumferential direction under the drive of the deflection shaft always forms a fixed tilt angle with the axis of the rotating shaft.

2. The horizontal circumferential rocking mechanism of the massage chair according to claim 1, characterized in that: A transmission part is provided between the deflection shaft and the rotation shaft. The transmission part includes a first end face connected to the deflection shaft and a second end face connected to the rotation shaft. The center of the first end face is located on the axis of the deflection shaft, and the center of the second end face is located on the axis of the rotation shaft. The planes on which the first end face and the second end face are located have an inclination angle.

3. The horizontal circumferential rocking mechanism of the massage chair according to claim 2, characterized in that: The deflection mechanism further includes a limiting member, which includes a fixed end fixed on the support turntable and a rotating end rotatably disposed on the fixed end. The base is provided with a limiting groove for placing the rotating end. The limiting groove cooperates with the rotating end to restrict the rotating end from moving only along the width direction of the massage chair.

4. The horizontal circumferential rocking mechanism of the massage chair according to claim 3, characterized in that: The supporting turntable includes a support frame and a turntable frame that can rotate relative to each other. A telescopic cylinder is provided between the support frame and the turntable frame. The telescopic cylinder includes a cylinder body hinged to the turntable frame and a piston rod hinged to the support frame. The deflection shaft and the fixed end are both provided on the turntable frame.

5. The horizontal circumferential rocking mechanism of the massage chair according to claim 4, characterized in that: The support frame has a rotating shaft fixedly installed at a coaxial position. The turntable frame has a rotating cavity for placing each rotating shaft. The support frame can rotate relative to the turntable frame about the two rotating shaft axes.

6. The horizontal circumferential rocking mechanism of the massage chair according to claim 1, characterized in that: The deflection mechanism further includes a drive assembly, which includes a drive source and a transmission gear fixed to the rotating shaft. The drive source is used to drive the transmission gear to rotate.

7. The horizontal circumferential rocking mechanism of the massage chair according to claim 6, characterized in that: It also includes a position detection mechanism, which includes a transmitting end and a receiving end respectively disposed on the upper and lower sides of the transmission gear. The transmission gear is provided with a signal through hole for signal to pass through. When the transmitting end, the signal through hole and the receiving end are in a straight line, the deflection shaft drives the support turntable to be in a forward-facing state.

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