Massage chair

Abstract

The utility model relates to massage instrument technical field especially relates to a massage chair. Massage machine core fixed installation is in the side surface of installation support, and the middle part of the other side surface of installation support is swingable with the middle part of massage cushion frame and can swing, so that massage machine core can swing freely in a certain angle range with installation support relative to massage cushion frame. The two sides of installation support in the swing direction are fixedly connected with the opposite sides of massage cushion frame through spring respectively, and the both sides spring are symmetrically set up. The setting of spring provides the elastic reset force for the swing of installation support, makes massage machine core when not under external force can return to the middle balanced position automatically, provides the flexible damping support when massage machine core swings with the pressure of user, makes the swing action of massage machine core more soft, stable, and the spring elasticity buffer function can also effectively absorb the vibration produced when massage machine core works, reduces the operating noise, promotes the use experience.

Description

Technical Field

[0001] This utility model relates to the field of massage equipment technology, and in particular to a massage chair. Background Technology

[0002] With the increasing aging of the population and the accelerated pace of modern life, massage chairs, as a home and public facility that integrates health massage, relaxation, and soothing, have become increasingly popular and widely used. Massage chairs use built-in massage mechanisms to mechanically massage areas such as the back, waist, and buttocks, making them particularly popular among middle-aged and elderly people, as well as those who work at desks for long periods.

[0003] However, existing massage chairs still have the following shortcomings in actual use: First, the seat of a traditional massage chair is usually fixed to the chair frame, and its height and tilt angle are not adjustable. When a user needs to get up after a massage, they must rely entirely on their leg strength and arm support to transition from a seated to a standing position. For the elderly, those with weak leg muscles, those with joint problems, or those who are physically frail, this action is often very difficult, requiring considerable physical exertion and increasing the risk of instability, swaying, or even falling, posing a significant safety hazard. Although some existing massage chairs have assistive lifting devices, their structures are usually quite complex, resulting in an uneven lifting motion that can cause jerking or jamming, affecting the user's comfort and safety when getting up.

[0004] Secondly, most existing massage chairs use a rigid, fixed installation method on the seat frame, meaning the massage mechanism is fixed relative to the user's buttocks and cannot adaptively adjust to the user's actual body shape and posture. Since different users have different body curves and their posture changes during a massage, the rigidly fixed massage mechanism cannot maintain a close fit with the user at all times, resulting in uneven massage intensity distribution and further reducing the user experience. Utility Model Content

[0005] This utility model provides a massage chair, which aims to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A massage chair includes a massage chair frame, a massage cushion frame, a lifting component, a mounting bracket, and a massage mechanism. One end of the massage cushion frame is rotatably connected to one end of the massage chair frame. The massage mechanism is fixedly mounted on one side of the mounting bracket. Two swing seats are located in the middle of the massage cushion frame, distributed along the central axis of the massage chair, with the swing axes of the two swing seats aligned on the same straight line. The middle of the other side of the mounting bracket is mounted on the swing axes of the swing seats, allowing for left-right swinging motion. The left and right sides of the mounting bracket are respectively connected to one end of two springs, and the other ends of the two springs are fixedly connected to the left and right sides of the massage cushion frame. The lifting assembly is mounted on the massage chair frame, and the lifting assembly is rotatably connected to the other end of the massage cushion frame. The lifting assembly includes two mounting brackets, a drive motor, a gearbox, a drive shaft, a main gear, two transmission gears, a connecting bracket, a rotating shaft, multiple auxiliary wheels, and two connecting rods. The two mounting brackets are parallel to each other and spaced apart. Each mounting bracket is fixedly connected to the massage chair frame. Each mounting bracket is provided with a rack and a track groove. The gearbox is fixedly connected to the drive motor. The transmission shaft is horizontally arranged and rotatably supported on the gearbox. The main gear is fixedly sleeved on the transmission shaft. The output shaft of the drive motor is connected to the main gear through a gear set in the gearbox. Two transmission gears are fixedly sleeved at both ends of the transmission shaft, and the two transmission gears mesh with the two racks on the two mounting brackets respectively; the connecting bracket is fixedly mounted on the gearbox; the rotating shaft is horizontally arranged and rotatably supported on the connecting bracket, and the rotating shaft is parallel to the transmission shaft; a portion of a plurality of auxiliary wheels is fixedly sleeved on the transmission shaft, and another portion is fixedly sleeved on the rotating shaft, and the plurality of auxiliary wheels are respectively placed in the two track grooves on the two mounting brackets, and can move along the extension direction of the track grooves; One end of each of the two connecting rods is rotatably connected to the rotating shaft, and the other end of each of the two connecting rods is rotatably connected to the other end of the massage cushion frame.

[0007] Furthermore, the mounting bracket has a C-shaped cross-section, and the two mounting brackets are arranged opposite each other with their C-shaped openings facing each other. The rack and the track groove are both disposed on the inner bottom surface of the C-shaped mounting bracket, and the rack and the track groove are arranged side by side and both are arranged along the extension direction of the mounting bracket. The rack is disposed closer to the C-shaped opening of the mounting bracket than the track groove.

[0008] Furthermore, the main gear is fixedly sleeved in the middle position of the transmission shaft, the two transmission gears on the transmission shaft are located on both sides of the main gear, and the auxiliary wheels on the transmission shaft are respectively located on the outer sides of the two transmission gears.

[0009] Furthermore, the connecting frame is provided with two parallel extension walls, which are arranged opposite to each other. Each extension wall is provided with a mounting hole, and a bearing is embedded in each mounting hole. The rotating shaft passes through the two mounting holes and is supported by the bearing.

[0010] Furthermore, the number of auxiliary wheels on the rotating shaft is two, and the two auxiliary wheels are respectively fixedly sleeved on both ends of the rotating shaft.

[0011] Furthermore, the connecting frame is positioned at the middle of the rotating shaft, and the two connecting rods are located inside the two auxiliary wheels on the rotating shaft.

[0012] Furthermore, each of the two connecting rods has a bearing seat at one end, and the two connecting rods are respectively sleeved on the rotating shaft through the bearing seats.

[0013] Furthermore, the housing of the drive motor is fixedly integrated with the housing of the gearbox, the main gear is placed inside the gearbox, and the drive shaft passes through the through hole on the gearbox and is fixedly connected to the main gear.

[0014] Compared with the prior art, this utility model has the following advantages: This utility model provides a massage chair in which the massage mechanism is fixedly mounted on one side of a mounting bracket. The middle of the other side of the mounting bracket is swayably connected to the middle of the massage cushion frame, allowing the massage mechanism to swing freely within a certain angle range relative to the massage cushion frame. This floating mounting structure enables the massage mechanism to automatically adjust its angle according to the curves and posture changes of the user's corresponding body parts during operation, achieving adaptive fit between the massage mechanism and the user. This significantly improves the comfort and effectiveness of the massage, avoiding uneven massage intensity or localized pressure caused by rigid fixing. The mounting bracket is fixedly connected to the opposite sides of the massage cushion frame on both sides in the swing direction by springs, with the springs symmetrically arranged on both sides. The springs provide elastic restoring force for the swing of the mounting bracket, allowing the massage mechanism to automatically return to its neutral equilibrium position when no external force is applied. They also provide flexible damping support when the massage mechanism swings with the user's pressure, making the swinging motion of the massage mechanism smoother and more stable. Simultaneously, the elastic cushioning effect of the springs effectively absorbs the vibration generated during the operation of the massage mechanism, reducing operating noise and improving the user experience. Furthermore, the lifting component is mounted on the massage chair frame and rotatably connected to the other end of the massage cushion frame. When the user needs to get up, the lifting component pushes the other end of the massage cushion frame upward, causing the massage cushion frame to rotate around the rotatable connection point between its end and the massage chair frame. This smoothly lifts the massage cushion frame along with the user, effectively solving the technical problem of difficulty in getting up, especially for the elderly or those with weak leg muscles. The floating mounting structure of the massage mechanism and the lifting component work independently and do not interfere with each other, giving the massage chair both high-quality massage function and assistive standing function. The overall structure is compact and highly integrated. Attached Figure Description

[0015] Figure 1 This is a partial structural schematic diagram of a massage chair from a first-view perspective according to this embodiment; Figure 2 This is a partial structural schematic diagram of a massage chair from a second perspective according to this embodiment; Figure 3 This is a partial structural diagram of a massage chair from a third-view perspective according to this embodiment; Figure 4 yes Figure 1 The main view; Figure 5 yes Figure 1 Side view; Figure 6 yes Figure 1 A magnified view of a section at point A in the middle; Figure 7 yes Figure 3 A magnified view of a section at point B in the middle; Figure 8This is a schematic diagram of the overall structure of a massage chair (excluding the massage mechanism) according to this embodiment; Figure 9 yes Figure 8 A magnified view of a section at point C; Figure 10 This is a first-view overall structural schematic diagram of a massage chair (with a massage mechanism) according to this embodiment; Figure 11 This is a second-view overall structural schematic diagram of a massage chair (with a massage mechanism) according to this embodiment; Figure 12 This is a first-view schematic diagram of the installation structure of the massage mechanism of a massage chair according to this embodiment; Figure 13 This is a second-view schematic diagram of the installation structure of the massage mechanism of a massage chair according to this embodiment; Figure 14 This is a first-view structural schematic diagram of the swing seat of a massage chair according to this embodiment; Figure 15 This is a structural schematic diagram of the swing seat of a massage chair from a second perspective in this embodiment; Figure 16 This is a third-view structural schematic diagram of the swing seat of a massage chair according to this embodiment; Figure 17 This is a first-view structural schematic diagram of the mounting bracket for a massage chair according to this embodiment; Figure 18 This is a second-view structural schematic diagram of the mounting bracket for a massage chair according to this embodiment; Label Explanation: 1. Massage chair frame; 11. Mounting bracket; 111. Rack; 112. Track groove; 2. Massage seat frame; 21. Seat cushion; 22. Swing shaft; 23. Swing seat; 3. Lifting assembly; 31. Drive motor; 32. Gearbox; 33. Drive shaft; 34. Main gear; 35. Transmission gear; 36. Connecting frame; 37. Rotating shaft; 38. Auxiliary wheel; 39. Connecting rod; 4. Mounting bracket; 5. Massage mechanism; 6. Spring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] In the description of this utility model, it should be understood that the terms "upper," "lower," "horizontal," "vertical," "one end," "the other end," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "installation," "connection," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0018] like Figures 1 to 18 As shown, this embodiment provides a massage chair, including a massage chair frame 1, a massage cushion frame 2, a lifting component 3, a mounting bracket 4, and a massage mechanism 5; The massage chair frame 1, serving as the supporting skeleton of the entire massage chair, is typically constructed from welded or assembled metal profiles. It possesses sufficient structural strength and rigidity to support all other components of the massage chair. One end of the massage seat cushion frame 2 is rotatably connected to one end of the massage chair frame 1 via a hinge, pivot, or pin, allowing the massage seat cushion frame 2 to swing up and down relative to the massage chair frame 1 within a certain angle range around this rotatable connection point. A seat cushion board 21 is laid on the massage seat cushion frame 2 for the user to sit on. Its surface can be further layered with sponge, fabric, etc., to enhance seating comfort.

[0019] like Figures 10 to 11 As shown, the massage cushion frame 2 includes a rectangular frame and a horizontal bar. The two ends of the horizontal bar are fixedly connected to the midpoints of the two long sides of the rectangular frame, so that the horizontal bar is parallel to the short sides of the rectangular frame and located on the axis of symmetry of the two short sides. The massage mechanism 5 is fixedly mounted on one side of the mounting bracket 4. The middle of the other side of the mounting bracket 4 is swayably connected to the middle of the massage cushion frame 2. Specifically, the middle of the other side of the mounting bracket 4 is swayably connected to the horizontal bar of the massage cushion frame 2. One end of a spring 6 is connected to each side of the mounting bracket 4 in the swaying direction. The other ends of the two springs 6 are fixedly connected to the opposite sides of the massage cushion frame 2, specifically, the other ends of the two springs 6 are fixedly connected to the two short sides of the rectangular frame of the massage cushion frame 2.

[0020] The lifting assembly 3 is mounted on the massage chair frame 1, and is rotatably connected to the other end of the massage cushion frame 2. Specifically, the crossbar of the massage cushion frame 2 has two swing seats 23 distributed along the central axis of the massage chair, and the swing axes 22 of the two swing seats 23 are located on the same straight line. The middle part of the other side of the mounting bracket 4 is mounted on the swing seats and can swing along the swing axes 22 of the swing seats 23. The two springs 6 are arranged in a figure-eight shape when the massage chair is not in use.

[0021] Two swing seats are distributed along the central axis of the massage chair, with the swing axis coaxially positioned. This provides a clear and stable swing axis for the mounting bracket, ensuring that the mounting bracket (and the massage mechanism fixed to it) always rotates around the same axis during swinging. The swing trajectory is precise and controllable, preventing deviation or wobbling during the swinging process. The two swing seats form two support points on either side of the middle of the massage cushion frame, resulting in a more even distribution of force on the mounting bracket and improving the structural stability and reliability of the floating installation of the massage mechanism. Simultaneously, the swing seats, as independent mounting components, facilitate assembly and maintenance, reducing production and repair costs.

[0022] The lifting assembly 3 is mounted on the massage chair frame 1, and is rotatably connected to the other end of the massage cushion frame 2. The specific structure of the lifting assembly 3 includes two mounting brackets 11, a drive motor 31, a gearbox 32, a transmission shaft 33, a main gear 34, two transmission gears 35, a connecting bracket 36, a rotating shaft 37, multiple auxiliary wheels 38, and two connecting rods 39.

[0023] Two mounting brackets 11 are arranged parallel to each other and spaced apart. Each mounting bracket 11 is fixedly connected to the massage chair frame 1, for example, by bolts or welding to the left and right sides of the massage chair frame 1. Each mounting bracket 11 is equipped with a rack 111 and a track groove 112. The rack 111 meshes with the transmission gear 35 to transmit power, and the track groove 112 guides and limits the auxiliary wheel 38. A gearbox 32 is fixedly connected to a drive motor 31, which provides the power source for the entire lifting action. The gearbox 32 contains a gear set to convert the high-speed, low-torque power output from the drive motor 31 into a low-speed, high-torque power output. A drive shaft 33 is horizontally arranged and rotatably supported on the gearbox 32, and the drive shaft 33 can rotate freely around its own axis. The main gear 34 is fixedly sleeved on the transmission shaft 33, and the main gear 34 meshes with the gear set in the gearbox 32, thereby driving the output shaft of the motor 31 to transmit power to the main gear 34 through the gear set in the gearbox 32, which in turn drives the transmission shaft 33 to rotate.

[0024] Two transmission gears 35 are fixedly sleeved at both ends of the transmission shaft 33, meaning that one transmission gear 35 is fixedly installed at each of the left and right ends of the transmission shaft 33. The two transmission gears 35 rotate synchronously with the transmission shaft 33. The two transmission gears 35 mesh with two racks 111 on the two mounting brackets 11. When the transmission shaft 33 rotates, the transmission gears 35 roll on the racks 111, thereby driving the entire transmission shaft 33 and its connected components to move along the extension direction of the racks 111 (i.e., the extension direction of the mounting brackets 11). The connecting bracket 36 is fixedly installed on the gearbox 32 and moves together with the gearbox 32. The rotating shaft 37 is horizontally arranged and rotatably supported on the connecting bracket 36. The rotating shaft 37 can rotate freely around its own axis, and the rotating shaft 37 is parallel to the transmission shaft 33, maintaining a fixed distance between them.

[0025] A portion of the multiple auxiliary wheels 38 are fixedly mounted on the drive shaft 33, while another portion is fixedly mounted on the rotating shaft 37. The auxiliary wheels 38 are specifically rolling bearings or roller structures, with their outer rings contacting the inner wall of the track groove 112 and capable of rolling within it. All the auxiliary wheels 38 are respectively placed within the two track grooves 112 on the two mounting brackets 11 and can move freely along the extension direction of the track grooves 112. The main function of the auxiliary wheels 38 is to provide support and guidance for the drive shaft 33 and the rotating shaft 37, ensuring that they maintain the correct relative position with the mounting bracket 11 during movement and preventing offset or wobbling.

[0026] Two connecting rods 39 are symmetrically arranged on the left and right sides of the lifting assembly 3. One end of each connecting rod 39 is rotatably connected to the rotating shaft 37 (e.g., via a bearing or hinge), and the other end of each connecting rod 39 is rotatably connected to the other end of the massage cushion frame 2 (e.g., via a pin or hinge). As the final actuator for power transmission, the connecting rods 39 convert the linear motion of the rotating shaft 37 into the oscillating motion of the massage cushion frame 2.

[0027] The working principle of this embodiment is as follows: When the user needs to get up, the drive motor 31 is started. The rotational power output by the drive motor 31 is reduced and increased in torque by the gear set in the gearbox 32 and then transmitted to the main gear 34. The main gear 34 drives the transmission shaft 33 to rotate. The transmission gears 35 at both ends of the transmission shaft 33, under the action of meshing with the fixed rack 111, roll along the direction of the rack 111, thereby driving the transmission shaft 33 and the gearbox 32 as a whole to move forward along the extension direction of the mounting frame 11. The transmission shaft 33 drives the rotating shaft 37 to move forward synchronously through the connecting frame 36. The rotating shaft 37 then pushes the two connecting rods 39. The connecting rods 39 push the other end of the massage cushion frame 2 to swing upward. The massage cushion frame 2 rotates around the rotation connection point between one end and the massage chair frame 1, thereby smoothly lifting the cushion 21 together with the user, assisting the user to get up. During the aforementioned movement, the auxiliary wheels 38, fixedly mounted on the drive shaft 33 and the rotating shaft 37, roll within the track groove 112, providing continuous guidance and support for the drive shaft 33 and the rotating shaft 37, ensuring smooth and stable movement. After standing up, the drive motor 31 rotates in the opposite direction, allowing the massage cushion frame 2 to smoothly return to its initial position.

[0028] Through the above technical solution, the power output by the drive motor 31 is reduced and increased in torque by the gear set in the gearbox 32, and then transmitted to the drive shaft 33 by the main gear 34. The drive gears 35 at both ends of the drive shaft 33 mesh with the rack 111 fixed on the massage chair frame 1, converting the rotational motion into linear motion along the extension direction of the mounting frame 11. At the same time, multiple auxiliary wheels 38 fixedly sleeved on the drive shaft 33 and the rotating shaft 37 roll along the two track grooves 112 respectively, providing stable guidance and support for the drive shaft 33 and the rotating shaft 37, ensuring that the moving parts of the entire lifting assembly 3 run smoothly along the predetermined trajectory. The drive shaft 33 drives the rotating shaft 37 to move synchronously through the connecting frame 36. The rotating shaft 37 then pushes the other end of the massage cushion frame 2 to swing upward around its rotational connection point with the massage chair frame 1 through the two connecting rods 39, thereby smoothly lifting the cushion 21 together with the user, effectively solving the problem of the user's difficulty in getting up, and improving the safety and comfort of use. Two connecting rods 39 are symmetrically arranged and rotatably connected to the rotating shaft 37 and the massage cushion frame 2 respectively, ensuring that the lifting force is evenly transmitted to both sides of the massage cushion frame 2, thereby improving the stability and reliability of the lifting action.

[0029] Based on the above embodiments, the following further details are provided: the cross-sectional shape of the mounting bracket 11 is C-shaped, the openings of the two mounting brackets 11 corresponding to the C-shape are arranged opposite each other, the rack 111 and the track groove 112 are both arranged on the inner bottom surface of the mounting bracket 11 corresponding to the C-shape, and the rack 111 and the track groove 112 are arranged side by side and both are arranged along the extension direction of the mounting bracket 11.

[0030] The phrase "the cross-sectional shape of the mounting bracket 11 is C-shaped" means that when viewed from the end of the mounting bracket 11, its cross-sectional profile resembles the letter "C." Specifically, the mounting bracket 11 has a bottom surface and two side walls extending in the same direction from both sides of the bottom surface, forming an opening between the two side walls. When the two mounting brackets 11 are assembled, their C-shaped openings face each other; that is, the opening of the left mounting bracket 11 faces right, and the opening of the right mounting bracket 11 faces left, with the openings of the two mounting brackets 11 facing each other.

[0031] Both the rack 111 and the track groove 112 are disposed on the inner bottom surface of the C-shaped section of the mounting frame 11, that is, on the inner bottom wall surface of the C-shaped section. The rack 111 and the track groove 112 are arranged parallel to each other along the extension direction of the mounting frame 11 (i.e., the length direction of the mounting frame 11), and are staggered in the width direction.

[0032] Based on the above technical solution, the C-shaped mounting bracket 11 forms a semi-enclosed receiving space, integrating the rack 111 and the track groove 112 on the same inner bottom surface. This not only makes full use of the internal space of the mounting bracket 11, but also protects the rack 111 and the track groove 112 from damage caused by the structure of the mounting bracket 11 itself, preventing external debris from falling in or accidental collisions. At the same time, the openings of the two mounting brackets 11 are arranged opposite to each other, so that the transmission gear 35 and the auxiliary wheel 38 can cooperate with the rack 111 and the track groove 112 from the inside respectively. The structure is compact and the layout is reasonable, which helps to reduce the overall width of the lifting component 3 and facilitates its arrangement in the limited space inside the massage chair.

[0033] Based on the above embodiments, it is further specified that the rack 111 is positioned closer to the C-shaped opening of the mounting bracket 11 than the track groove 112.

[0034] In other words, in the width direction of the inner bottom surface of the C-shaped mounting bracket 11, the position of the rack 111 is closer to the opening side (i.e. closer to the open end of the C-shaped) relative to the track groove 112, while the position of the track groove 112 is relatively farther away from the opening side (i.e. closer to the inner depth of the closed bottom wall of the C-shaped).

[0035] Based on the above technical solution, since the transmission gear 35 needs to mesh with the rack 111 to transmit driving force, the rack 111 is positioned closer to the opening, which facilitates the teeth of the transmission gear 35 to extend from the opening side and form a stable mesh with the rack 111, reducing the risk of interference during installation and movement. Meanwhile, the track groove 112 is located deep inside the bottom surface, relatively far from the opening, providing a more reliable limiting and guiding path for the auxiliary wheel 38. This makes it difficult for the auxiliary wheel 38 to fall out of the groove when it rolls in the track groove 112 because it is blocked by the C-shaped side wall. This further improves the smoothness and safety of the lifting assembly 3's movement.

[0036] Based on the above embodiments, it is further defined that: the main gear 34 is fixedly sleeved in the middle position of the transmission shaft 33, the two transmission gears 35 on the transmission shaft 33 are located on both sides of the main gear 34, and the auxiliary wheel 38 on the transmission shaft 33 is located on the outside of the two transmission gears 35 respectively.

[0037] The middle position of the drive shaft 33 refers to the area near the center point along its axial direction. The main gear 34 is fixedly mounted in this central area. Two drive gears 35 are mounted on the left and right sides of the main gear 34, respectively, and are symmetrically distributed with respect to the main gear 34. There are two auxiliary wheels 38 on the drive shaft 33, which are mounted further outwards from the two drive gears 35 (i.e., to the left of the left drive gear 35 and to the right of the right drive gear 35).

[0038] Based on the above technical solution, the main gear 34 is located in the middle of the transmission shaft 33, so that the power from the drive motor 31 is input from the center of the transmission shaft 33, and the transmission gears 35 on both sides are symmetrically subjected to force, avoiding bending deformation of the transmission shaft 33 or uneven gear meshing caused by uneven load. At the same time, the auxiliary wheel 38 is set on the outside of the transmission gear 35, which can provide auxiliary support for the transmission shaft 33 on the outside of the meshing area between the transmission gear 35 and the rack 111, effectively dispersing the load borne by the transmission shaft 33, reducing the bending deformation of the transmission shaft 33, extending the service life of the transmission shaft 33 and the bearings, and ensuring the accuracy and reliability of long-term operation.

[0039] Based on the above embodiments, the following is further defined: the connecting frame 36 is provided with two parallel extension walls, which are arranged opposite to each other. Each extension wall is provided with a mounting hole, and a bearing is embedded in each mounting hole. The rotating shaft 37 passes through the two mounting holes and is supported by the bearing.

[0040] The connecting frame 36 is fixedly mounted on the housing of the gearbox 32. The main body of the connecting frame 36 is roughly U-shaped or fork-shaped, with two parallel extending walls, i.e., two extension walls. The two extension walls are opposite each other and spaced a certain distance apart. Each extension wall has a mounting hole, and the two mounting holes are coaxially arranged. A bearing (e.g., a rolling bearing or a sliding bearing) is embedded in each mounting hole. The rotating shaft 37 passes through the mounting holes on the two extension walls in sequence, and the outer ring of the rotating shaft 37 mates with the inner ring of the bearing, thereby achieving rotatable support of the rotating shaft 37 on the connecting frame 36.

[0041] Based on the above technical solution, the connecting frame 36 provides two-point support for the rotating shaft 37 through bearings on two extended walls, ensuring that the axis of the rotating shaft 37 remains parallel to the transmission shaft 33 and preventing the rotating shaft 37 from deviating under force. The bearings significantly reduce the frictional resistance when the rotating shaft 37 rotates, making the connecting rod 39 move more flexibly and smoothly with the rotating shaft 37, reducing power loss, and also improving the wear resistance at the mating point between the rotating shaft 37 and the bearing seat of the connecting rod 39, thus extending the service life of the equipment.

[0042] Based on the above embodiments, it is further specified that: the number of auxiliary wheels 38 on the rotating shaft 37 is two, and the two auxiliary wheels 38 are respectively fixedly sleeved on both ends of the rotating shaft 37.

[0043] An auxiliary wheel 38 is fixedly installed at each of the left and right ends of the rotating shaft 37, and the two auxiliary wheels 38 move synchronously with the rotating shaft 37. In the assembled state, the auxiliary wheel 38 at the left end of the rotating shaft 37 is placed in the track groove 112 of the left mounting bracket 11, and the auxiliary wheel 38 at the right end of the rotating shaft 37 is placed in the track groove 112 of the right mounting bracket 11.

[0044] Based on the above technical solution, auxiliary wheels 38 are respectively set at both ends of the rotating shaft 37. The two auxiliary wheels 38 are respectively placed in the track grooves 112 of the two mounting brackets 11, so that when the rotating shaft 37 moves along the track grooves 112, both ends are synchronously and stably guided and supported, preventing the rotating shaft 37 from tilting or jamming due to uneven force. At the same time, the two auxiliary wheels 38 are symmetrically distributed at both ends of the rotating shaft 37, forming a four-wheel synchronous guiding structure together with the two auxiliary wheels 38 on the transmission shaft 33, ensuring that the moving parts of the entire lifting assembly 3 are subjected to balanced force and run smoothly, effectively improving the smoothness of the lifting action.

[0045] Based on the above embodiments, it is further defined that: the connecting frame 36 and the rotating shaft 37 are located at the middle position of the rotating shaft 37, and the two connecting rods 39 are located on the inner side of the two auxiliary wheels 38 on the rotating shaft 37 respectively.

[0046] The mating position between the connecting frame 36 and the rotating shaft 37 refers to the position where the connecting frame 36 applies driving force to the rotating shaft 37, that is, the parts where the two extended walls on the connecting frame 36 mate with the rotating shaft 37. This part is located in the middle region along the axial direction of the rotating shaft 37. The installation positions of the two connecting rods 39 on the rotating shaft 37 are respectively located on the right side (i.e., the inner side) of the left auxiliary wheel 38 and the left side (i.e., the inner side) of the right auxiliary wheel 38 at the left end of the rotating shaft 37, that is, both connecting rods 39 are located between the two auxiliary wheels 38.

[0047] Based on the above technical solution, the connecting frame 36 inputs driving force from the middle position of the rotating shaft 37, and the two connecting rods 39 are symmetrically arranged on the inner side of the two auxiliary wheels 38, so that the force points on the rotating shaft 37 (driving point of connecting frame 36, force application point of connecting rod 39, and support point of auxiliary wheel 38) are reasonably distributed along the axial direction, avoiding the generation of bending moment concentration on the rotating shaft 37; at the same time, the connecting rod 39 is located on the inner side of the auxiliary wheel 38, so that the auxiliary wheel 38 can roll freely in the track groove 112 without being interfered with by the movement of the connecting rod 39. The layout is compact and reasonable, further improving the coordination and stability of the lifting action.

[0048] Based on the above embodiments, it is further specified that: one end of each of the two connecting rods 39 is provided with a bearing seat, and the two connecting rods 39 are respectively sleeved on the rotating shaft 37 through the bearing seats to achieve rotatable connection with the rotating shaft 37.

[0049] One end of the connecting rod 39 (i.e., the end connected to the rotating shaft 37) is provided with a bearing housing, in which a bearing (such as a rolling bearing or a sliding bearing) is embedded. During assembly, the rotating shaft 37 passes through the inner ring of the bearing in the bearing housing, thereby allowing the connecting rod 39 to rotate freely about the axis of the rotating shaft 37. The two connecting rods 39 have the same structure and are respectively fitted onto corresponding positions on the left and right sides of the rotating shaft 37 through their respective bearing housings.

[0050] Based on the above technical solution, the connecting rod 39 is rotatably connected to the rotating shaft 37 through the bearing seat, so that the connecting rod 39 can swing freely around the axis of the rotating shaft 37 while moving with the rotating shaft 37, thereby adapting to the arc-shaped movement trajectory of the connection point between the other end of the connecting rod 39 and the massage cushion frame 2 during the lifting process; the setting of the bearing seat effectively reduces the friction loss between the rotating shaft 37 and the connecting rod 39, ensuring the smoothness of power transmission, and also avoiding rigid jamming between the connecting rod 39 and the rotating shaft 37, ensuring the smoothness of the lifting and lowering process of the massage cushion frame 2.

[0051] Based on the above embodiments, it is further defined that: the two mounting brackets 11 are symmetrically arranged with the central axis of the massage chair frame 1 as the axis of symmetry, and the two transmission gears 35, the auxiliary wheel 38 fixedly sleeved on the transmission shaft 33, the auxiliary wheel 38 fixedly sleeved on the rotating shaft 37, and the two connecting rods 39 are all symmetrically arranged with the central axis of the massage chair frame 1 as the axis of symmetry.

[0052] The central axis of the massage chair frame 1 refers to the central axis of symmetry extending along the front-to-back direction of the massage chair frame 1, which divides the massage chair frame 1 into two symmetrical halves. Two mounting brackets 11 are respectively located on the left and right sides of this central axis, and are mirror-symmetrical with respect to this central axis. Two transmission gears 35 are respectively located at the left and right ends of the transmission shaft 33, and are symmetrical with respect to the central axis of the massage chair frame 1. Two auxiliary wheels 38, fixedly sleeved on the transmission shaft 33, are respectively located on the left and right sides of the transmission shaft 33 and are symmetrical with respect to the central axis. Two auxiliary wheels 38, fixedly sleeved on the rotating shaft 37, are respectively located at the left and right ends of the rotating shaft 37 and are symmetrical with respect to the central axis. Two connecting rods 39 are respectively located on the left and right sides of the massage chair frame 1 and are symmetrical with respect to the central axis.

[0053] Based on the above technical solution, all paired components are arranged symmetrically with the central axis of the massage chair frame 1 as the axis of symmetry. This ensures that the driving force, support force, and movement stroke of the lifting component 3 on both sides are completely symmetrical and consistent during operation, fundamentally eliminating the off-center load phenomenon. This ensures that the massage cushion frame 2 rises and falls synchronously at both ends during the lifting process without twisting or tilting, thereby greatly improving the user's comfort and safety when getting up. It also reduces abnormal wear of components caused by off-center load and extends the product's service life.

[0054] Based on the above embodiments, the following further details are provided: the housing of the drive motor 31 is fixedly integrated with the housing of the gearbox 32, the main gear 34 is placed inside the gearbox 32, and the transmission shaft 33 passes through the through hole on the gearbox 32 and is fixedly connected to the main gear 34.

[0055] The housing of the drive motor 31 and the gearbox 32 are fixed as a single unit by means of bolting, welding, or integral casting. The interior of the gearbox 32 forms a closed or semi-closed receiving chamber, in which the main gear 34 is housed. A through hole is provided on the gearbox 32 for the drive shaft 33 to pass through. The drive shaft 33 extends into the gearbox 32 through this through hole and is fixedly connected to the main gear 34 (e.g., by key connection or interference fit). A seal may be further provided between the drive shaft 33 and the through hole in the gearbox 32 to prevent lubricating grease leakage.

[0056] Based on the above technical solution, the drive motor 31 and the gearbox 32 are integrated into a single structure, ensuring a constant relative positional accuracy between the motor output shaft and the gear set inside the gearbox 32, avoiding coaxiality deviation or loose connection that may result from separate installation; the main gear 34 is enclosed inside the gearbox 32, effectively protecting it from dust, debris and other foreign objects entering the meshing area, while the lubricating grease inside the gearbox 32 can be maintained for a long time, ensuring that the gear transmission pair is in a good lubrication state, improving transmission efficiency and service life; the design of the drive shaft 33 passing through the through hole of the gearbox 32 allows the gearbox 32 to also provide auxiliary support for the drive shaft 33, enhancing the stability of the drive shaft 33 during operation.

[0057] This utility model has been described with reference to the above-described embodiments and accompanying drawings. However, the above embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. On the contrary, modifications and equivalent provisions included in the spirit and scope of the claims are all included within the scope of this utility model.

Claims

1. A massage chair, comprising a massage chair frame, characterized in that, It also includes a massage cushion frame, lifting components, mounting brackets, and massage mechanism; One end of the massage cushion frame is rotatably connected to one end of the massage chair frame. The massage mechanism is fixedly mounted on one side of the mounting bracket. Two swing seats are located in the middle of the massage cushion frame, distributed along the central axis of the massage chair, with the swing axes of the two swing seats aligned on the same straight line. The middle of the other side of the mounting bracket is mounted on the swing axes of the swing seats, allowing for left-right swinging motion. The left and right sides of the mounting bracket are respectively connected to one end of two springs, and the other ends of the two springs are fixedly connected to the left and right sides of the massage cushion frame. The lifting assembly is mounted on the massage chair frame, and the lifting assembly is rotatably connected to the other end of the massage cushion frame. The lifting assembly includes two mounting brackets, a drive motor, a gearbox, a transmission shaft, a main gear, two transmission gears, a connecting bracket, a rotating shaft, multiple auxiliary wheels, and two connecting rods. The two mounting brackets are parallel to each other and spaced apart. Each mounting bracket is fixedly connected to the massage chair frame. Each mounting bracket is provided with a rack and a track groove. The gearbox is fixedly connected to the drive motor. The transmission shaft is horizontally arranged and rotatably supported on the gearbox. The main gear is fixedly sleeved on the transmission shaft. The output shaft of the drive motor is connected to the main gear through a gear set in the gearbox. Two transmission gears are fixedly sleeved at both ends of the transmission shaft, and the two transmission gears mesh with the two racks on the two mounting brackets respectively; the connecting bracket is fixedly mounted on the gearbox; the rotating shaft is horizontally arranged and rotatably supported on the connecting bracket, and the rotating shaft is parallel to the transmission shaft; a portion of a plurality of auxiliary wheels is fixedly sleeved on the transmission shaft, and another portion is fixedly sleeved on the rotating shaft, and the plurality of auxiliary wheels are respectively placed in the two track grooves on the two mounting brackets, and can move along the extension direction of the track grooves; One end of each of the two connecting rods is rotatably connected to the rotating shaft, and the other end of each of the two connecting rods is rotatably connected to the other end of the massage cushion frame.

2. The massage chair according to claim 1, characterized in that, The mounting bracket has a C-shaped cross-section, and the two mounting brackets are arranged opposite each other with their C-shaped openings facing each other. The rack and the track groove are both located on the inner bottom surface of the C-shaped mounting bracket, and the rack and the track groove are arranged side by side and along the extension direction of the mounting bracket. The rack is located closer to the C-shaped opening of the mounting bracket than the track groove.

3. The massage chair according to claim 1, characterized in that, The main gear is fixedly sleeved in the middle of the transmission shaft, and the two transmission gears on the transmission shaft are located on both sides of the main gear. The auxiliary wheels on the transmission shaft are located on the outer sides of the two transmission gears respectively.

4. The massage chair according to claim 1, characterized in that, The connecting frame is provided with two parallel extension walls, which are arranged opposite to each other. Each extension wall is provided with a mounting hole, and a bearing is embedded in each mounting hole. The rotating shaft passes through the two mounting holes and is supported by the bearing.

5. The massage chair according to claim 1, characterized in that, The rotating shaft has two auxiliary wheels, which are respectively fixedly sleeved at both ends of the rotating shaft.

6. The massage chair according to claim 5, characterized in that, The connecting frame is positioned at the middle of the rotating shaft, and the two connecting rods are located inside the two auxiliary wheels on the rotating shaft.

7. The massage chair according to claim 1, characterized in that, Each of the two connecting rods has a bearing seat at one end, and the two connecting rods are respectively sleeved on the rotating shaft through the bearing seats.

8. The massage chair according to claim 1, characterized in that, The housing of the drive motor is fixedly integrated with the gearbox housing. The main gear is placed inside the gearbox, and the drive shaft passes through the through hole on the gearbox and is fixedly connected to the main gear.

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