Massage chair frame

Abstract

The massage chair frame comprises a frame body, a swing track, an elastic deformation rack set, an elastic blocking strip and a massage core. The swing track forms a bending transition section. The elastic deformation rack set can bend and adjust the tooth surface orientation according to the curvature of the bending transition section. The elastic blocking strip is fixed to the track wall surface of the bending transition section, and the cantilever free end of the elastic blocking strip applies elastic pressing force to the outer edge of the gear to prevent the gear from being radially separated at the bending section, so that the massage core can smoothly move through the bending transition section on the whole track.

Description

Technical Field

[0001] This invention relates to the field of massage equipment technology, and more specifically, to a massage chair frame. Background Technology

[0002] Massage chairs are common health and wellness devices that use built-in massage mechanisms to apply kneading, tapping, and other massage actions to different parts of the body. Existing massage chairs typically have a back massage mechanism that moves along a track in the backrest area, covering a massage range from the neck to the waist. However, for the leg massage area, the leg massage section in traditional massage chairs is usually fixed in place, and the massage mechanism cannot move along the track, limiting the massage range to a localized area near the fixed position.

[0003] Because the smaller the bend angle of the track, the closer the track bend is to a sharp angle, the more likely the massage chair mechanism will get stuck, rub against the track, or become completely blocked when making sharp turns; the larger the bend angle, the smoother the track bend.

[0004] Although some massage chairs are equipped with movable leg massage mechanisms, the small bend angle between the tracks in the leg area and the track in the waist area makes it difficult for the walking gears of the massage mechanism to maintain stable engagement in the bend transition area, causing the massage mechanism to be unable to move smoothly to the buttock position.

[0005] Therefore, at locations with smaller bends on the massage chair track, the massage mechanism struggles to maintain continuous guiding motion, limiting the massage range to a localized area, and preventing the massage mechanism from moving completely along the entire track. Summary of the Invention

[0006] This invention provides a massage chair frame that uses a rotating mechanism at the corresponding leg joint position to adjust the bending angle of the massage mechanism as it passes through. An elastic deformation rack assembly is used to ensure the smooth passage of the gears. For areas with large openings in the bending transition section, elastic baffles are used to restrict the rollers and reduce roller bounce, thereby improving the smoothness of the massage mechanism as it passes through the bending transition section.

[0007] A massage chair frame includes: a frame body; a swing track installed on the frame body, comprising a bending transition section and a guide channel extending along the track, the track covering the back and legs of the user; an elastically deformable rack assembly laid along the entire inner side of the swing track, the bending transition section being a complete section that can elastically bend with the curvature of the track and adaptively adjust posture; an elastic stop bar located at the guide channel position of the bending transition section, on the opposite side of the tooth surface of the elastically deformable rack assembly; and a massage mechanism with coaxially arranged gears and rollers, the rollers slidingly engaging with the guide channel and the gears meshing with the elastically deformable rack assembly; at the bending transition section, the coaxial rollers are restricted by the elastic stop bar, so that the coaxial gears are constrained between the elastic stop bar and the elastically deformable rack assembly.

[0008] Furthermore, the swing track is provided with a rotating shaft for swinging in the bending transition section; when the massage mechanism passes through the bending transition section, the elastic deformation rack assembly undergoes elastic bending deformation with the curvature of the bending transition section, and at the same time, the elastic deformation rack assembly deforms around the corresponding rotating shaft to adaptively adjust its posture, so that the tooth surface of the elastic deformation rack assembly and the gear remain in meshing state in the bending transition section.

[0009] Furthermore, the swing track includes an upper rail frame and a lower rail frame, with the upper rail frame installed on the frame body; a lower frame is fixed below the upper rail frame, and a crossbar is fixed to the lower rail frame; a swing electric push rod is hinged between the lower frame and the crossbar.

[0010] Furthermore, an insertion port is provided on the track wall of the bending transition section, and one end of the elastic stop bar is fixed; the other end of the elastic stop bar is inserted into the insertion port, and the other end extends towards the roller side in the radial direction of the swing track to form a cantilever free end; a clearance is formed between the cantilever free end and the tooth surface of the elastic deformation rack set; when the gear travels along the elastic deformation rack set to the bending transition section, the cantilever free end undergoes elastic bending deformation due to the compression of the outer edge of the coaxial roller, and applies an elastic resistance force towards the elastic deformation rack set to the outer edge of the coaxial roller, thus constraining the coaxial gear to the meshing position with the elastic deformation rack set.

[0011] Furthermore, the diameter of the socket is larger than the cross-sectional area of ​​the elastic stop bar, and a rotating pressure roller is installed on the socket. The pressure roller and the inner bottom of the socket squeeze the elastic stop bar. Bushings are installed at both ends of the pressure roller, and elastic rings are embedded in the bushings. The elastic rings and bushings are engaged at both ends of the socket.

[0012] Furthermore, the elastic stop bar is provided with thin steel sheets and steel wire ropes. The thin steel sheets are arranged along the length of the elastic stop bar, and the steel wire ropes are connected in series with the thin steel sheets.

[0013] Furthermore, two massage mechanisms are installed on the swing track, namely a waist massage mechanism and a leg massage mechanism. Each of the waist massage mechanism and the leg massage mechanism has an independent motor and gears. The gears of the waist massage mechanism and the leg massage mechanism respectively mesh with the elastic deformation rack assembly and move independently along the swing track.

[0014] Furthermore, the waist massage mechanism moves back and forth between the back section and the waist section of the swing track, while the leg massage mechanism moves back and forth between the leg section of the swing track, through a bend transition section, and the hip section. The waist massage mechanism and the leg massage mechanism can operate simultaneously.

[0015] Furthermore, a left guard plate and a right guard plate are fixedly installed on both sides of the frame. The left guard plate and the right guard plate are located on both sides of the width direction of the swing track. The inner wall surface of the left guard plate and the inner wall surface of the right guard plate form a clearance fit with the corresponding side of the massage mechanism housing.

[0016] Furthermore, a foot massage component is fixedly installed on the swing track corresponding to the position of the sole of the human foot. The foot massage component is installed.

[0017] In summary, the present invention has at least one of the following beneficial effects:

[0018] The oscillating track is used to reduce the curvature change amplitude of the bending transition section, and the elastic deformation rack is used to compensate for the meshing error caused by the remaining curvature change; the elastic stop bar acts directly on the roller, and the roller is coaxial with the gear, thus indirectly limiting the radial offset of the gear; the elastic deformation rack ensures gear meshing, the elastic stop bar prevents the gear from radially disengaging, and the oscillating track adjusts the bending angle to adapt to the movement's passage through three layers of logic.

[0019] This invention solves the technical problem of unstable meshing and inability to pass smoothly in the bending transition area of ​​the track by using an elastically deformable rack assembly and setting an elastic stop bar in the bending transition section. It achieves the technical effect that the massage core can move stably throughout the bending transition section and the stroke of a single massage core can cover the continuous massage range from the legs to the back.

[0020] The elastic baffle is embedded with segmented thin steel sheets and steel wire ropes. This built-in skeleton structure retains the flexibility of the elastic baffle while using a metal core to enhance its tensile strength.

[0021] The elastic stop bar is pressed by a pressure roller at the insertion position to reduce the upward movement of the free end of the elastic stop bar after being hit by the roller, and to improve the restraint force of the elastic stop bar on the roller. Attached Figure Description

[0022] Figure 1 This is an isometric view of a massage chair frame in one of the embodiments;

[0023] Figure 2 This is a top view of a massage chair frame in one of the embodiments;

[0024] Figure 3 This is a schematic diagram of the overall structure of a massage chair frame in one embodiment;

[0025] Figure 4 yes Figure 3 Enlarged view of point A;

[0026] Figure 5 This is a side view of a massage chair frame in one embodiment;

[0027] Figure 6 This is a partial sectional view of the massage chair frame;

[0028] Figure 7 yes Figure 6 Enlarged view of point B;

[0029] Figure 8 This is an overall schematic diagram of the track in the embodiment;

[0030] Figure 9 This is an exploded view of the upper and lower racks on one side of the track in the embodiment;

[0031] Figure 10 This is a schematic diagram of the rotation axis connection relationship of the rotation point in the embodiment;

[0032] Figure 11 This is a schematic diagram showing the positions of the elastic baffle and the socket in the embodiment;

[0033] Figure 12 This is a schematic diagram of the assembly of the gears and rollers on one side of the track in the embodiment;

[0034] Figure 13 This is a schematic diagram of the rotational changes of the upper and lower rails in the embodiment;

[0035] Figure 14 This is a schematic diagram showing the state changes of the elastic baffle after the upper and lower rails are rotated in the embodiment.

[0036] Figure 15 This is a schematic diagram of the frame structure in the embodiment;

[0037] Figure 16 This is a schematic diagram showing the connection relationship between the lower frame, crossbar, and swing electric push rod in the embodiment;

[0038] Figure 17 This is a schematic diagram showing the positional relationship between the sliding frame, the lower frame, and the swing rod in the embodiment;

[0039] Figure 18 This is a schematic diagram showing the connection relationship between the base frame, the sliding frame, and the electric push rod in the embodiment;

[0040] Figure 19 This is a schematic diagram illustrating the sliding relationship between the base frame and the sliding frame in the embodiment;

[0041] Figure 20 This is a schematic diagram of the pressure roller located at the insertion port in the embodiment;

[0042] Figure 21 This is a schematic diagram of the pressure roller structure in the embodiment;

[0043] Figure 22 This is a schematic diagram showing the positional relationship between the thin steel sheet and the wire rope inside the elastic baffle in the embodiment.

[0044] In the picture:

[0045] 01. Roller; 02. Gear;

[0046] 1. Swing track; 11. Upper rail frame; 12. Lower rail frame; 13. Rotating shaft; 14. Connecting plate; 15. Nut;

[0047] 21. Rail No. 1; 22. Rail No. 2;

[0048] 3. Elastic deformation rack assembly; 31. Upper rack; 32. Lower rack;

[0049] 40. Bending transition section; 41. Elastic retaining strip; 42. Stepped section; 43. Insert;

[0050] 51. Waist massage mechanism;

[0051] 52. Leg massage mechanism;

[0052] 71. Left guard plate; 72. Right guard plate;

[0053] 8. Foot massage component;

[0054] 6. Frame; 61. Base frame; 62. Sliding frame; 63. Lower frame; 64. Swinging electric push rod; 65. Pushing electric push rod; 66. Swing rod; 67. Rotating shaft No. 1; 68. Rotating shaft No. 2; 69. Crossbar; 691. Slide rail;

[0055] 011. Pressure roller; 012. Bushing; 013. Elastic ring;

[0056] 021. Thin steel sheet; 022. Steel wire rope. Detailed Implementation

[0057] Example 1: A massage chair frame, such as Figure 1-7 As shown, it includes a frame 6, a swing track 1, an elastic deformable rack assembly 3, an elastic baffle 41, a waist massage mechanism 51, a leg massage mechanism 52, left and right guard plates, and a foot massage assembly 8.

[0058] The frame 6 serves as the support frame for the massage chair, extending along the back and legs of the user in a seated position. A left guard plate 71 and a right guard plate 72 are located on both sides of the frame 6 to provide lateral restraint for the massage mechanism. A foot massage component 8 is located at the bottom of the swing track 1.

[0059] The swing track 1 is installed on the frame 6 along the extension direction of the frame 6, extending from the position on the frame 6 corresponding to the back of the human body to the position on the frame 6 corresponding to the legs of the human body. The swing track 1 forms a bent transition section at the joint of the human body's leg, therefore, the bent transition section corresponds to the position of the joint of the human body's leg.

[0060] The bend in the transition section allows the overall orientation of the swing track 1 to conform to the contours of the human body from the thigh to the lower leg. The swing track 1 is equipped with a guide channel for the massage mechanism to travel.

[0061] The elastically deformable rack assembly 3 is laid on the inner side of the swing track 1 along its extension direction. The elastically deformable rack assembly 3 is connected to the swing track 1, allowing it to rotate relative to the swing track around its axis. The elastically deformable rack assembly 3 is made of nylon and possesses elastic deformation capability. When the massage mechanism passes through the bending transition section of the swing track, the elastically deformable rack assembly 3 can bend and deform according to the curvature of the bending transition section, thus maintaining the meshing state between the surface of the elastically deformable rack assembly 3 and the gears of the massage mechanism in the bending area. The rotatable connection of the elastically deformable rack assembly 3 allows it to adaptively adjust its posture to match the changing direction of different sections of the swing track.

[0062] The elastic stop bar 41 is provided in the bending transition section of the swing track 1. One end of the elastic stop bar 41 is fixed; the other end of the elastic stop bar 41 is inserted into the slot opened on the swing track, and the other end of the elastic stop bar 41 extends along the radial direction of the swing track 1 toward the side of the elastic deformation rack group 3 to form a cantilever structure.

[0063] The elastic baffle 41 is located on the tooth-facing side of the elastic deformation rack group 3, and a gap is formed between the elastic baffle 41 and the elastic deformation rack group 3 for the gears and rollers of the massage mechanism to pass through.

[0064] When the gear of the massage mechanism travels along the elastic deformation rack group 3 to the bending transition section, the gear is subjected to the normal component force at the bending point and tends to detach from the elastic deformation rack group 3. The elastic stop bar 41 applies a resistance force towards the rack direction to the outer edge of the coaxial roller through its own bending elastic deformation, preventing the coaxial roller and gear from jumping away from the elastic deformation rack group 3, and maintaining the continuous meshing of the gear and the elastic deformation rack group 3.

[0065] The massage mechanism is mounted on a swing track and includes gears that mesh with an elastically deformable rack assembly 3. The massage mechanism moves along the swing track by rotating the gears on the elastically deformable rack assembly. The massage mechanism can move from the leg section of the swing track, through a bend transition section, to the section corresponding to the waist and even the back, thus covering the massage area of ​​the legs, hips, waist, and back with a single massage mechanism.

[0066] After the massage chair is started, the gears of the massage mechanism rotate under the drive, and the gears mesh with the elastic deformation rack group 3. The massage mechanism moves along the swing track to the target massage area.

[0067] As the massage mechanism moves from the leg section to the waist section, it enters the bending transition section of the swing track. In this transition section, the elastic deformation rack assembly undergoes elastic bending deformation following the bending direction of the swing track. The elastic deformation rack assembly 3 rotates around the axis to adaptively adjust its meshing angle with the gear, ensuring that the gear and the elastic deformation rack assembly maintain meshing transmission in the bending area. Simultaneously, the elastic stop bar applies elastic pressure to the outer edge of the roller, and the gear coaxial with the roller also receives this elastic pressure. This elastic pressure counteracts the tendency of the gear to disengage due to the normal component force at the bending point, allowing the gear to move stably within the elastic deformation rack assembly 3.

[0068] After passing through the bend transition section, the massage mechanism continues to move along the swing track to the waist or back section, where it performs massage movements. After the massage is completed, the massage mechanism returns to the leg section along the reverse path via the bend transition section.

[0069] In some embodiments, a single massage mechanism can be used to achieve continuous movement from the back to the legs, wherein the single massage mechanism is a leg massage mechanism 52.

[0070] In other embodiments, a dual-mechanism application scheme is adopted, in which the waist massage mechanism 51 and the leg massage mechanism 52 work separately. When the dual massage mechanisms are provided, the waist massage mechanism 51 and the leg massage mechanism 52 move to their respective target sections and perform massage actions on the user's waist and legs at the same time.

[0071] The waist massage mechanism 51 and the leg massage mechanism 52 are each equipped with independent gears, which mesh with the elastically deformable rack assembly 3 respectively, and move independently along the swing track. The waist massage mechanism 51 reciprocates between the back section and the waist section of the swing track, while the leg massage mechanism 52 reciprocates between the leg section and the buttock section of the swing track. The two massage mechanisms can operate simultaneously, providing synchronous massage to the user's waist and legs respectively.

[0072] This embodiment utilizes the elastic deformation rack assembly 3, which can rotate around a pivot point, laid on a swing track. By leveraging the elastic deformation capability of nylon, the racks can adaptively bend with the track curvature at the bending transition section, maintaining the meshing state between the rack surface and the gears. This overcomes the problem of gear disengagement caused by excessive rigidity in the bending area of ​​traditional racks. Simultaneously, by setting an insertable elastic stop bar at the bending transition section, the cantilever bending deformation of the stop bar applies a counterforce towards the rack to the outer edge of the gear, counteracting the tendency for the gear to jump out due to the normal component force at the bending point. This solves the problem of unstable movement of the massage mechanism in the bending transition area. Based on this structure, the massage mechanism can smoothly move from the leg area through the bending transition section to the hip and even the waist area, allowing the stroke of a single massage mechanism to cover the complete massage range of the legs, hips, waist, and back, eliminating blind spots between massage areas and improving the continuity of the massage experience.

[0073] The swing track 1 rotates at the corresponding leg joint position to adjust the bending angle of the massage mechanism when it passes through. The elastic rack satisfies the passage of the gears, and the elastic stop bar restricts the roller 01, reducing the bounce of the roller 01, so as to improve the smoothness of the massage mechanism passing through the bending transition section.

[0074] The specific structural relationships are explained below.

[0075] Reference Figure 8 The swing track 1 includes an upper rail frame 11 and a lower rail frame 12.

[0076] The upper rail frame 11 consists of two symmetrical parts, with a concave rod welded and fixed in the middle; the lower rail frame 12 also consists of two symmetrical parts, with a concave rod welded and fixed in the middle.

[0077] The upper rail frame 11 and the lower rail frame 12 are connected vertically. The connection points on both sides are connected by a rotating shaft 13 with the axis on the same straight line. Therefore, the upper rail frame 11 and the lower rail frame 12 can rotate relative to each other around the rotating shaft 13.

[0078] The upper rail 11 is designed to fit the curves of the human body, namely the back, waist, hips and thighs. The thighs are an extension of the hip trajectory, so the massage mechanism can move smoothly on the upper rail 11.

[0079] At the pivot point 13 of the bending transition section 40, the upper rail frame 11 and the lower rail frame 12 are connected by rotating up and down. The rotation point corresponds to the position of the human knee joint. The rotation of the upper rail frame 11 and the lower rail frame 12 can adjust their rotation angle. When the rotation angle is large, the massage chair is relatively smooth, like a recliner, which facilitates the passage of the massage mechanism. When the rotation angle is small, the massage chair is like a seat, which is convenient for the user to sit on.

[0080] Figures 9-10 Regarding the rotating shaft 13, the rotating shaft 13 is fixed to the upper rail frame 11, and a rotating sleeve is sleeved on the outside of the rotating shaft 13; a connecting plate 14 is fixed to the lower rail frame 12, the outer end of the rotating shaft 13 is a threaded part, and the nut 15 rotates to the threaded part to abut and lock the rotating sleeve. The connecting plate 14 is sleeved on the rotating sleeve to achieve free rotation, and the connecting plate 14 can drive the lower rail frame 12 to rotate around the rotating shaft 13.

[0081] Figures 11-12 Both the upper rail frame 11 and the lower rail frame 12 have two parallel slots on their side walls, designated as rail number 1 21 and rail number 22 respectively. The two rails are arranged vertically, with rail number 1 21 located on the lower inner side and rail number 22 located on the upper inner side. The guide channel includes rail number 1 21 and rail number 22.

[0082] The upper rail frame 11 and the lower rail frame 12 are connected at the joint of the first rail 21, and the upper rail frame 11 and the lower rail frame 12 are also connected at the joint of the second rail 22. The first rail 21 and the second rail 22 are used to constrain the walking path of the roller 01 in the massage mechanism, reduce the jumping of the roller 01 during walking, and thus make the overall walking of the massage mechanism more stable.

[0083] The rotating shaft 13 is located between rail 21 and rail 22, and is positioned close to rail 21; for example Figure 14 (a) State: In this embodiment, the shortest distance a between the track of track 21 and the center of the rotating shaft 13 is , and the shortest distance b between the track of track 22 and the center of the rotating shaft 13 is , where b is three times a; in other embodiments, the user can adjust the specific numerical ratio of a and b according to design needs.

[0084] This size design results in a smaller change in the opening amplitude of the first rail 21 at the rotation point when rotating around the rotating shaft 13, while the opening amplitude of the second rail 22 at the rotation point changes more significantly. The purpose of this design is that an elastic deformation rack assembly 3 needs to be installed on the same side of the first rail 21. In order to meet the meshing requirements of the gear 02, the rack of the elastic deformation rack assembly 3 cannot have excessive tooth opening changes.

[0085] The specific structure of the elastic deformation rack assembly 3 is as follows:

[0086] Figure 8 and Figure 9 Elastically deformable rack assembly 3 is installed on the upper rail frame 11 and the lower rail frame 12 to provide walking meshing support for the gear 02 of the massage mechanism; the elastically deformable rack assembly 3 is arranged on the same side as the first rail 21, and the complete rack segment structure covers the rotating connection of the upper rail frame 11 and the lower rail frame 12. Figure 9 and Figure 12The elastic deformation rack assembly 3 includes an upper rack 31 and a lower rack 32. Both the upper rack 31 and the lower rack 32 are nylon racks. The lower rack 32 covers the rotating connection of the upper rail frame 11 and the lower rail frame 12. The upper rail frame 11 and the lower rail frame 12 are provided with protruding arc plates. The upper rack 31 and the lower rack 32 are fixed to the corresponding arc plates by screws at the bottom. The rotating connection refers to the position of the arc plate where the upper rail frame 11 and the lower rail frame 12 are disconnected at the rotation point.

[0087] Figures 10-13 The second rail 22 has a bending transition section 40 at the rotation point. The bending transition section 40 has an elastic stop bar 41 and a socket 43. The lower rail frame 12 has a socket 43 adapted to the insertion of the elastic stop bar 41. The diameter of the socket 43 is larger than the cross-sectional area of ​​the elastic stop bar 41. One end of the elastic stop bar 41 is fixed to the upper rail frame 11 by screws, and the other end of the elastic stop bar 41 is inserted into the lower rail frame 12.

[0088] The elastic baffle 41 is made of nylon and has excellent toughness.

[0089] The main body of the elastic baffle 41 has a Z-shaped structure, which allows the lower part of the elastic baffle 41 to fit against the surface of the second rail 22.

[0090] The elastic baffle 41 has a step 42 at one end of the insertion port 43. When the upper rail 11 and the lower rail 12 are in a seated position with a small angle, the step 42 allows the free end of the elastic baffle 41 to be smoothly inserted into the insertion port 43, reducing the deformation of the elastic bounce. Since the massage chair is in a standby state when it is in a seated position, this working condition lasts longer. Therefore, the step 42 is used to reduce the deformation time of the elastic baffle 41.

[0091] Reference Figures 12-14 Working principle: The swing track 1 consists of an upper rail frame 11 and a lower rail frame 12, which are connected by rotating shaft 13. The connection point corresponds to the position of the human knee joint in space. For the bending transition section 40, the lower rack 32 is connected across the rotating connection point of the upper rail frame 11 and the lower rail frame 12, completely covering the rotation point.

[0092] The rack is fixed to the side of the rail frame by a number of spaced screws. The rack between two screws has a floating amount, and the part covering the rotation point remains floating to allow it to generate elastic tension when bent.

[0093] Based on the combined effects of the optimized position of the rotating shaft 13, the floating connection structure of the rack, and the properties of the elastic material, the position of the rotating shaft 13 determines the change in arc length on the rack side, the floating connection structure is used to release local strain, the nylon rack has elastic deformation capability, and the micro-elastic deformation of the nylon material absorbs residual strain, so that the tooth pitch at the rotating connection is kept as continuous and uniform as possible, so that the gear always maintains full tooth meshing and reduces the risk of tooth disengagement and jamming.

[0094] When the massage mechanism moves to the knee joint, gear 02 engages with the elastically deformable rack assembly 3, while rollers 01 are respectively embedded in rail 21 and rail 22. The rotation point is designed to be close to rail 21, so that when the rail frame bends, the bending radius of the rack deformation is small, ensuring that the pitch can still accurately mesh with gear 02 after deformation.

[0095] Operating procedure: When the massage mechanism moves from the back to the legs, the control unit on the massage chair controls the power component, which drives the upper rail frame 11 and the lower rail frame 12 to rotate relative to each other. The driving component can be a cylinder, hydraulic cylinder, power push rod, etc. The control unit controls the power component according to the position or stroke signal of the massage mechanism, so that the rail frame completes the angle adjustment before the mechanism enters the bending transition section.

[0096] Because the first rail 21 and the elastic deformation rack group 3 are positioned close to the rotation point, during rotation, the lower rack 32 covering the rotation point undergoes only minor stretching or compression deformation, and the tooth pitch remains within the error range where the gears 02 of the massage mechanism can mesh. Simultaneously, the opening formed at the rotation point by the larger radius of the second rail 22 is covered by the elastic stop 41. When the rollers 01 of the massage mechanism pass through this bent transition section 40, they are always restrained and stopped by the elastic stop 41, avoiding mechanical impact noise or jamming caused by the disconnection of the swing rail 1. Thus, the massage mechanism completes its movement between the upper rail frame 11 and the lower rail frame 12.

[0097] In other embodiments, the rotation angle adjustment of the rail frame can also be automatically controlled, as follows: Step 1, the massage mechanism has a built-in position sensor / limit switch, and when the mechanism moves to 50-80mm before the bending transition section, the angle adjustment signal is triggered;

[0098] Step 2: The control unit prioritizes driving the swing electric push rod to pre-adjust the angle between the upper rail frame 11 and the lower rail frame 12 from 90° in the sitting position to 150°-160° in the lying position. After the angle adjustment is completed, the movement enters the rotation section.

[0099] Step 3: After the angle is adjusted to the correct position, the electric push rod locks and the rail frame angle is fixed. After the mechanism has completely passed through the rotating section, the control unit drives the rail frame to reset to the user-set angle. The single mechanism can continuously travel along the back, waist and lower legs without blind spots.

[0100] Reference Figures 15-19 The frame includes a frame 6, which includes a base frame 61 and a sliding frame 62. Both the base frame 61 and the sliding frame 62 are metal frames. The base frame 61 is provided with a slide rail 691, and the sliding frame 62 slides on the slide rail 691.

[0101] A push-electric actuator 65 is hinged between the base frame 61 and the sliding frame 62; the extension and retraction of the push-electric actuator 65 can drive the sliding frame 62 to move back and forth on the base frame 61.

[0102] A lower frame 63 is fixed below the upper rail frame 11. The lower frame 63 includes four support rods, and the lower ends of the four support rods are fixed by welding.

[0103] A crossbar 69 is fixed at the lower end of the lower rail frame 12, and a swing electric push rod 64 is hinged between the lower frame 63 and the crossbar 69; the extension and retraction of the swing electric push rod 64 causes the lower rail frame 12 to rotate relative to the upper rail frame 11.

[0104] When the swinging electric push rod 64 is stationary, the upper rail frame 11 and the lower rail frame 12 are relatively fixed.

[0105] The upper rail frame 11 is connected to the frame 6. Specifically, the upper rail frame 11 and the sliding frame 62 are rotatably connected by a first rotating shaft 67. A swing rod 66 is hinged on the base frame 61, and the upper rail frame 11 and the swing rod 66 are rotatably connected by a second rotating shaft 68.

[0106] Therefore, one rotating fulcrum of the upper rail frame 11 is installed on the sliding frame 62, and the other rotating fulcrum is installed on the base frame 61. The extension and retraction action of pushing the electric push rod 65 can drive the upper rail frame 11 to swing vertically, thereby adjusting the upper rail frame 11 to a sitting or lying position.

[0107] Example 2, a massage chair frame, is a further improvement, differing from Example 1 in that, referring to... Figures 20-21 A rotating pressure roller 011 is installed on the insertion port 43, and the pressure roller 011 and the inner bottom of the insertion port 43 compress the elastic baffle 41.

[0108] The pressure roller 011 has bushings 012 installed at both ends. The bushings 012 have elastic rings 013 embedded in them. The elastic rings 013 and bushings 012 are inserted into the two ends of the insertion port 43.

[0109] The pressure roller 011 spans across the opening of the insertion port 43, and its circumferential surface contacts the upper surface of the elastic baffle 41, pressing it toward the inner bottom of the insertion port 43.

[0110] Assembly details: Both ends of the pressure roller 011 are fitted with bushings 012, and elastic rings 013 are embedded in the outer circumference of the bushings 012. The entire assembly is inserted into the positioning groove on the side wall of the insertion port 43 by the interference fit of the elastic rings 013.

[0111] The elastic ring 013 provides a continuous downward elastic preload to the pressure roller 011, ensuring that the pressure roller 011 always presses against the upper surface of the elastic stop bar 41. The pressure roller 011 and the elastic stop bar 41 are in a rolling fit, which transforms the traditional sliding friction into rolling friction, significantly reducing the wear of the elastic stop bar 41. At the same time, the pressing action of the pressure roller 011 can limit the upward movement of the elastic stop bar 41 when it is impacted by the movement roller 01, ensuring that the elastic stop bar 41 continuously and effectively limits the movement of the roller 01 in the second rail 22, preventing the roller 01 from jumping or getting stuck, and ensuring the smooth passage of the massage movement through the bending transition section 40.

[0112] Example 3, a massage chair frame, belongs to the category of durability enhancement, which differs from Example 1 or Example 2 in that, referring to... Figure 22 The elastic baffle 41 is provided with thin steel sheet 021 and steel wire rope 022. The thin steel sheet 021 is arranged along the length of the elastic baffle 41, and the steel wire rope 022 is connected in series with the thin steel sheet 021.

[0113] The elastic retaining strip 41 is internally encased in segmented thin steel sheets 021. These thin steel sheets 021 are arranged along their length and connected in series by steel wire ropes 022. The thin steel sheets 021 ensure the retaining strip's flexibility in both horizontal and vertical directions, allowing it to adapt to track curvature. The steel wire ropes 022 provide strong tensile strength, preventing the nylon strip from elongating or breaking under long-term high loads and high-frequency bending. This "skeleton" connection structure allows the thin steel sheets 021 to provide support and prevent collapse when the retaining strip is compressed vertically by the mechanism rollers 01; and when the track frame rotates and pulls the retaining strip, the steel wire ropes 022 bear the axial tension, preventing the nylon material from undergoing permanent plastic deformation due to long-term fatigue.

[0114] The embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make more equivalent embodiments based on the guidance of the present embodiments, all of which are within the protection scope of the present invention.

Claims

1. A massage chair frame, characterized by, include: Frame; The swing track, installed on the frame, includes a bending transition section and a guide channel extending along the track, which covers the back and legs of the human body; The elastic deformation rack assembly is laid along the entire inner side of the swing track, with the bending transition section laid as a complete section. It can bend elastically with the curvature of the track and adjust its posture adaptively. The elastic stop bar is located in the guide channel of the bending transition section, on the opposite side of the tooth surface of the elastic deformation rack assembly; The massage mechanism is equipped with coaxially arranged gears and rollers. The rollers slide with the guide channel, and the gears mesh with the elastically deformable rack assembly. At the bending transition section, the coaxial rollers are restricted by elastic baffles, so that the coaxial gears are constrained between the elastic baffles and the elastically deformable rack assembly.

2. The massage chair frame according to claim 1, characterized in that, The swing track is equipped with a pivot for swinging during the bending transition section; When the massage mechanism passes through the bending transition section, the elastic deformation rack assembly undergoes elastic bending deformation according to the curvature of the bending transition section. At the same time, the elastic deformation rack assembly deforms around the corresponding axis to adaptively adjust its posture, so that the tooth surface of the elastic deformation rack assembly and the gear remain in meshing state in the bending transition section.

3. The massage chair frame according to claim 1, wherein The swing track includes an upper rail frame and a lower rail frame, with the upper rail frame installed on the frame body; A lower frame is fixed below the upper rail frame, and a crossbar is fixed to the lower rail frame. A swing electric push rod is hinged between the lower frame and the crossbar.

4. The massage chair frame according to claim 1, wherein An insertion slot is provided on the track wall of the bending transition section, and one end of the elastic baffle is fixed; The other end of the elastic stop bar is inserted into the socket, and the other end extends toward the roller side in the radial direction of the swing track to form a cantilever free end; A clearance is formed between the free end of the cantilever and the tooth surface of the elastically deformable rack assembly. When the gear travels along the elastically deformable rack assembly to the bending transition section, the free end of the cantilever undergoes elastic bending deformation due to the compression of the outer edge of the coaxial roller. An elastic resistance force is applied to the outer edge of the coaxial roller in the direction of the elastically deformable rack assembly, thus constraining the coaxial gear to the meshing position with the elastically deformable rack assembly.

5. The massage chair frame according to claim 4, characterized in that, The diameter of the socket is larger than the cross-sectional area of ​​the elastic stop bar. A rotating pressure roller is installed on the socket, and the pressure roller and the bottom of the socket squeeze the elastic stop bar. Bushings are installed at both ends of the pressure roller, and elastic rings are embedded in the bushings. The elastic rings and bushings are engaged at both ends of the socket.

6. The massage chair frame according to claim 1, characterized in that, The elastic stop bar is equipped with thin steel sheets and steel wire ropes. The thin steel sheets are arranged along the length of the elastic stop bar, and the steel wire ropes are connected in series with the thin steel sheets.

7. The massage chair frame according to claim 1, characterized in that, Two massage mechanisms are installed on the swing track: a waist massage mechanism and a leg massage mechanism. Each of the waist massage mechanism and the leg massage mechanism has an independent motor and gears. The gears of the waist massage mechanism and the leg massage mechanism mesh with the elastic deformation rack assembly, and each moves independently along the swing track.

8. The massage chair frame according to claim 7, characterized in that, The waist massage mechanism moves back and forth between the back section and the waist section of the swing track, while the leg massage mechanism moves back and forth between the leg section of the swing track, through a bend transition section, and the hip section. The waist massage mechanism and the leg massage mechanism can operate simultaneously.

9. The massage chair frame according to claim 1, characterized in that, Left and right guard plates are fixedly installed on both sides of the frame. The left and right guard plates are located on both sides of the width direction of the swing track. The inner wall surfaces of the left and right guard plates are respectively fitted with the corresponding sides of the massage mechanism housing.

10. The massage chair frame according to claim 1, characterized in that, The swing track is fixedly installed with foot massage components corresponding to the position of the soles of the human feet.

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