A flat-foldable flexible guide rail structure and a massage chair frame comprising the same

Abstract

The application provides a flat flexible guide rail structure and a massage chair frame comprising the same, and belongs to the technical field of massage chairs. The technical problem of the existing massage chair guide rail in the transition area walking assembly easy to jump, produce abnormal sound and unable to completely flatten is solved. A flat flexible guide rail structure, comprising a chassis, a lying frame is rotatably connected to one side of the chassis, and a bending part is integrally formed at the end of the lying frame away from the chassis, and the inner side of the bending part is fixedly connected with a bending assembly, and the bending assembly comprises a plurality of equidistantly arranged bending units. In the application, the bending assembly is composed of a plurality of bending units, and the bending units are connected by rectangular springs. The rectangular springs provide a continuous and uninterrupted walking support surface for the walking assembly, and also serve as an elastic return element when the bending assembly is switched from the bending state to the flat state. The plurality of bending units are elastically connected by the rectangular springs to form a flexible whole.

Description

Technical Field

[0001] This invention belongs to the field of massage chair technology, and relates to a massage chair guide rail, particularly a flattenable flexible guide rail structure and a massage chair frame including the structure. Background Technology

[0002] Massage chairs mainly consist of a guide rail structure and a massage mechanism mounted on the guide rail structure. Users can adjust the position of the massage mechanism according to the desired massage position. Massage guide rail technology has evolved from no guide rail to S-shaped, SL-shaped, and then to flexible guide rails. A flexible guide rail is an openable two-section guide rail, which is different from the one-piece fixed angle design of the traditional L-shaped guide rail. It consists of two independent structures: a backrest guide rail and a seat guide rail. The initial angle is about 112°, and it can be opened to a larger angle to achieve a flat massage.

[0003] A search revealed that, for example, the guide rail and massage chair frame disclosed in Chinese patent documents [Application No.: CN202310878372.3; Publication No.: CN116763616A] include a backrest guide rail, a seat guide rail, and a flexible guide rail assembly arranged along the extension path of the guide rail. One end of the flexible guide rail assembly is connected to the backrest guide rail, and the other end is connected to the seat guide rail. The flexible guide rail assembly includes multiple flexible rail modules arranged along the extension path of the guide rail. There is a gap between adjacent flexible rail modules, and adjacent flexible rail modules are connected by a hinge. The rotation axis of the hinge is perpendicular to the extension path of the guide rail. The flexible rail modules adjust the size of the gap by rotating, causing the flexible guide rail assembly to bend and change the angle between the backrest guide rail and the seat guide rail.

[0004] Although the guide rail and massage chair frame disclosed in the patent achieve the bending of the flexible guide rail assembly by hinged multiple flexible rail modules, the hinge structure between the flexible rail modules is complex, and the gap between adjacent modules changes significantly during the bending process, making it difficult to ensure the stability of the walking component running on the guide rail throughout its entire stroke. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a flattenable flexible guide rail structure and a massage chair frame incorporating this structure. The technical problem this invention aims to solve is: how to achieve a smooth transition between the flattened and bent states of the massage chair guide rail, while ensuring that the walking component moves continuously and smoothly along the entire travel of the guide rail, avoiding gaps and jumping during movement.

[0006] The objective of this invention can be achieved through the following technical solutions: A flattenable flexible guide rail structure includes a base frame, a reclining frame rotatably connected to one side of the base frame, and an integrally formed bending portion at the end of the reclining frame away from the base frame. A bending assembly is fixedly connected to the inner side of the bending portion, and the bending assembly includes multiple equidistantly arranged bending units. The bending unit includes two side plates, which are fixedly installed on the inner side of the reclining frame. A fixing tube is fixedly connected between the two parallel side plates, and a side connecting rod is fixedly installed on the side of the side plate away from the reclining frame. The side connecting rod is parallel to the bottom of the fixing tube, and a sealing plate is fixedly connected to the other end of the side connecting rod. The sealing plate is parallel to one side of the side plate. The fixing tubes are arranged in parallel and equidistantly on the inner side of the lying frame, and the number is odd. The middle fixing tube is rotatably connected to the middle part of the middle winding wheel, and the outer wall of the winding wheel is wound with a pull rope in the opposite direction. The two ends of the pull rope are fixedly connected to the second fixing block, and the two second fixing blocks are respectively fixedly installed on the outer walls of the two fixing tubes on the outer sides of the two ends. A first fixing block is fixedly connected to the outer wall of the fixing tube between the middle fixing tube and the outer fixing tube, and a pull rope is installed through the inside of the first fixing block. A limit block is also fixedly connected to the outer wall of the pull rope, and the limit block is located outside the first fixing block. The outer wall of the side connecting rod is fixedly installed with a mounting block, and a rectangular spring is fixedly connected between two adjacent mounting blocks. Multiple rectangular springs are arranged alternately along the length of the reclining frame, with equal horizontal spacing between adjacent rectangular springs, and a walking component is provided on the surface of the rectangular spring. The rectangular spring provides a continuous and uninterrupted walking support surface for the walking assembly, and also serves as an elastic reset element when the bending assembly switches from the bending state to the flattened state. Multiple bending units are connected by rectangular springs to form a flexible whole, so that the walking component always keeps in contact with the rectangular spring when walking on the surface of the bending component, avoiding walking gaps and jumping.

[0007] The working principle of this invention is as follows: During operation, the stepper motor starts and drives the take-up wheel to rotate via the drive rod and connecting block. When it is necessary to switch the bent part of the upper part of the reclining frame from a flat state to a bent state, that is, from a lying posture to a sitting or semi-reclining posture, the stepper motor drives the take-up wheel to rotate forward. The take-up wheel simultaneously tightens the two ends of the pull rope wound in the opposite direction on its outer wall. The two ends of the pull rope are respectively fixedly connected to the outer wall of the fixed tube on the outer side of the two ends by the second fixing block, and the pull rope is inserted through the first fixing block on the outer wall of each middle fixed tube. As the pull rope is pulled... As the rope tightens, the distance between the fixed tubes decreases evenly under the pull of the rope, and the bending units gradually move closer together. The bending assembly smoothly transitions from a flattened state to a bent state. During this process, the limiting block moves with the rope to abut against the first fixed block, limiting the minimum distance between adjacent fixed tubes and preventing excessive bending that could damage the structure. At the same time, the elastic buffer pad on the limiting block undergoes elastic deformation, absorbing the impact energy at the moment of contact and reducing impact noise. When it is necessary to switch the reclining frame from the bent state back to the flattened state, the stepper motor drives... The rewinding wheel rotates in the opposite direction, simultaneously releasing both ends of the pull rope. At this time, the rectangular springs between each bending unit rely on their own elastic restoring force to push each fixed tube to reset and unfold outward. Multiple rectangular springs are arranged alternately along the length of the reclining frame. The horizontal staggered spacing of adjacent rectangular springs is equal, and the elastic coefficient of each rectangular spring is the same, so that each bending unit is evenly stressed and deforms synchronously during the reset process. The bending assembly as a whole smoothly switches from the bent state to the flattened state, realizing the complete flattening of the reclining frame. When the walking assembly is working, the electric motor drives the crossbar to rotate, driving the walking wheels to walk on the surface of the rectangular springs. Since the spiral top surface of the rectangular spring is a continuous and flat walking support track surface, and the gap between two walking wheels is smaller than the staggered spacing between adjacent rectangular springs, the walking wheels always maintain effective contact with the rectangular springs during the walking process and will not get stuck in the gap between adjacent rectangular springs. The walking assembly can continuously walk along the surface of the rectangular springs on the full stroke of the guide rail, from one end of the bending part to the other end, realizing full coverage of the user's massage.

[0008] The middle of the fixed tube in the middle position is fitted with a winding wheel that is rotatably connected, and both ends of the winding wheel are rotatably connected to the fixed tube. A stepper motor is fixedly installed inside the fixed tube, and a drive rod is fixedly connected to the output end of the stepper motor. The drive rod is rotatably connected inside the fixed tube, and a connecting block is fixedly connected to the outer wall of the drive rod. The connecting block is fixedly installed inside the winding wheel.

[0009] With the above structure, the stepper motor drives the take-up wheel to rotate precisely inside the fixed tube through the drive rod and connecting block. The take-up wheel is fitted and rotated in the middle of the fixed tube, and both ends are rotated and connected to the fixed tube, ensuring the coaxiality and stability of the take-up wheel during rotation. The stepper motor has a power-off self-locking function. When the bending assembly is switched to the required bending angle, the stepper motor is powered off and self-locked, constraining the drive rod and take-up wheel to maintain the current rotation angle, so that the pull rope is kept in the current tightened or released state, thereby maintaining the current shape of the bending assembly and preventing the posture from slipping back due to gravity or external force.

[0010] The rectangular spring is arranged in a rectangular spiral shape, and both ends of the rectangular spring are fixedly connected to connecting ears that are connected to the mounting block.

[0011] With the above structure, the rectangular spiral shape makes the spring form a continuous and flat spiral top surface. The spiral top surface serves as the walking support track surface of the walking component, providing a flat walking plane for the walking wheels.

[0012] The reclining frame and its bending section are integrally stamped from high-strength steel plates, and grooves are provided at both the upper and lower ends of the bending section, with the grooves extending along the length of the bending section. The groove serves both as a weight-reducing groove to lighten the overall weight of the reclining frame and as a stress-relieving groove during bending of the bending section to prevent fatigue cracks from forming in the bending section during repeated bending.

[0013] With the above structure, the reclining frame and its bending parts are integrally stamped from high-strength steel plates, which ensures the overall structural strength and avoids stress concentration and strength attenuation caused by welding. The groove can effectively absorb and release the stress generated by bending, preventing fatigue cracks in the bending parts.

[0014] The walking assembly includes a massage body, and side plates are fixedly connected to both sides of the bottom of the massage body. Two crossbars are rotatably connected between the two side plates, and two walking wheels are fixedly connected to both ends of the crossbars. The two wheels are arranged in parallel, and the gap between the two wheels is smaller than the staggered spacing between adjacent rectangular springs; An electric motor is fixedly connected to one end of the crossbar, and the electric motor is fixedly installed on the outer wall of the side plate.

[0015] With the above structure, the two traveling wheels are arranged in parallel, and the gap between the two traveling wheels is smaller than the staggered gap between adjacent rectangular springs. This ensures that the traveling wheels can always maintain effective contact with the rectangular springs when they travel on the surface of the rectangular springs, avoiding the problem of the traveling components getting stuck due to bending.

[0016] The winding reel has two winding directions, forward and reverse, with the pull rope wound in opposite directions around the outer wall of the winding reel; When the winding wheel rotates in the forward direction, it simultaneously tightens both ends of the pull rope, causing the distance between each fixed tube to decrease evenly, so that the bending assembly switches from a flattened state to a bent state. When the winding wheel rotates in the opposite direction, it releases both ends of the pull rope synchronously. The rectangular springs rely on their own elastic restoring force to push each fixed tube to reset, so that the bending assembly switches from the bending state to the flattened state.

[0017] By adopting the above structure and controlling the forward and reverse rotation of the winding wheel, the bending component can be precisely and smoothly switched between flattening and bending states, so that the upper part of the reclining frame can be fully flattened to meet the needs of the human body when lying flat.

[0018] The distance between the limiting block and the first fixing block is less than the initial distance between two adjacent fixing tubes; When the winding wheel tightens the pull rope, the limit block moves with the pull rope to abut against the first fixed block to limit the minimum distance between adjacent fixed tubes and prevent the bending assembly from being over-bent, which could cause structural damage.

[0019] With the above structure, when the limiting block moves with the pull rope to abut against the first fixed block, the pull rope can no longer drive the outer fixed tube to move closer to the middle, thereby limiting the minimum distance between adjacent fixed tubes within a safe range. This avoids excessive bending of the bending assembly due to excessive winding of the winding wheel, effectively preventing collisions between fixed tubes and structural damage caused by excessive deformation of the bending part, and improving the safety and reliability of the bending assembly at the bending limit position.

[0020] An elastic buffer pad is fixedly provided on the side of the limiting block near the first fixed block. When the limiting block abuts against the first fixed block, the elastic buffer pad undergoes elastic deformation to absorb the collision energy and reduce the impact noise generated at the moment of contact.

[0021] With the above structure, the elastic cushioning pad first contacts the first fixed block and undergoes elastic deformation to absorb the collision energy, effectively reducing the impact noise generated at the moment of contact, improving the quietness of the massage chair, and enhancing the user experience.

[0022] A massage chair frame includes the aforementioned flattenable flexible guide rail structure. A connecting rod is fixedly installed inside the reclining frame and is rotatably connected to the inner side of the base frame. A sleeve is fixedly connected to the outer wall of the connecting rod, and a connecting frame is fixedly connected to the bottom end of the sleeve. The output end of a first cylinder is rotatably connected to the lower part of the connecting frame, and a frame base is rotatably connected to the other end of the first cylinder. Rotating rods are rotatably connected to the middle of both sides of the base frame, and a lower bracket is fixedly installed below the rotating rods. A movable rod is fixedly connected to the bottom end of the lower bracket, and the outer wall of the movable rod is rotatably connected to one end of the frame base. The middle part of the frame is also rotatably connected to a second cylinder, and the output end of the second cylinder is rotatably connected to a connector. The top of the connector is fixedly installed with a front frame, and the top of the front frame is rotatably connected to the outer side of the base frame away from the reclining frame. The first cylinder drives the connecting rod to rotate through the connecting frame and the sleeve, causing the reclining frame to flip relative to the base frame and adjust the tilt angle of the reclining frame; The second cylinder drives the base frame to rotate and unfold relative to the frame via a connector, so as to adjust the height and angle of the front end of the massage chair frame.

[0023] The working principle of this invention is as follows: During operation, the reclining frame is rotatably connected to the inner side of the base frame via a connecting rod, enabling the reclining frame to be rotated and adjusted relative to the base frame. When the massage chair frame needs to switch from a sitting position to a fully flat position, the output end of the first cylinder extends, pushing the connecting rod to rotate through the connecting frame and sleeve. The connecting rod causes the reclining frame to rotate downward around the hinge point at the rear end of the base frame, gradually making the reclining frame more horizontal. At the same time, the output end of the second cylinder retracts, pushing the front frame frame to rotate downward around the rotating support at the front end of the base frame via the connecting piece, so that the upper surface of the base frame and the upper surface of the reclining frame are on the same horizontal plane, achieving full flatness. When it is necessary to switch from the fully flat state back to the sitting position, the first and second cylinders move synchronously in opposite directions, causing the reclining frame to rotate upward and lift up, while the front frame frame causes the base frame to rotate upward and retract, restoring the sitting position.

[0024] The lower bracket is configured in an "H" shape, comprising two parallel longitudinal beams and a crossbeam fixedly connected between the two longitudinal beams. The top ends of the two longitudinal beams are fixedly connected to the rotating rods on the corresponding sides, and the bottom ends of the two longitudinal beams are fixedly connected to the two ends of the movable rod.

[0025] By adopting the above structure, the "H"-shaped structure of the lower bracket makes the rotating rods on both sides of the base frame rigidly connected through the lower bracket, ensuring the synchronicity of the two sides of the base frame during rotation, avoiding the problem of chair frame twisting and deformation caused by asynchronous rotation on both sides, and improving the overall structural stability and coordination of the chair frame.

[0026] Compared with the prior art, the flattenable flexible guide rail structure and the massage chair frame including the structure of the present invention have the following advantages: 1. In this invention, a bending assembly consisting of multiple bending units is provided. The bending units are connected by rectangular springs. The rectangular springs provide a continuous and uninterrupted walking support surface for the walking assembly and also serve as elastic reset elements when the bending assembly switches from the bent state to the flattened state. The multiple bending units are connected by the rectangular springs to form a flexible whole, so that the walking assembly always keeps in contact with the rectangular springs when walking on the surface of the bending assembly. This effectively avoids the problem of gaps at the connection points of traditional rigid transition guides, which can cause the walking assembly to jump or make abnormal noises. This ensures the stability and smoothness of the massage mechanism running on the guide rail throughout its entire stroke.

[0027] 2. In this invention, by setting a winding wheel and a pull rope wound in the opposite direction around its outer wall, under the drive of a stepper motor, the winding wheel rotates forward and simultaneously tightens both ends of the pull rope, causing the distance between each fixed tube to decrease evenly, so that the bending assembly smoothly switches from a flat state to a bent state. When the winding wheel rotates in the opposite direction, the two ends of the pull rope are released simultaneously, and the rectangular spring pushes each fixed tube to reset by its own elastic restoring force, so that the bending assembly smoothly switches from a bent state to a flat state. Through this setting, the bending assembly can achieve precise and smooth switching between the flat state and the bent state, so that the upper bending part of the reclining frame can reach a completely flat state, meeting the user's need for a completely flat reclining position.

[0028] 3. In this invention, by setting a limiting block on the pull rope, and the limiting block being located outside the first fixed block, the distance between the limiting block and the first fixed block is less than the initial distance between two adjacent fixed tubes. When the winding wheel tightens the pull rope, the limiting block moves with the pull rope to abut against the first fixed block, which effectively limits the minimum distance between adjacent fixed tubes, avoids excessive bending of the bending assembly leading to structural damage, and improves the safety and service life of the product.

[0029] 4. In this invention, by arranging the two wheels of the walking assembly in parallel and the gap between the two wheels being smaller than the staggered gap between adjacent rectangular springs, the walking wheels can always maintain effective contact with the rectangular springs during walking, preventing the walking wheels from falling off or getting stuck during movement, thus further ensuring the stability and reliability of the walking assembly.

[0030] 5. In this invention, the arrangement of the first and second cylinders allows the first cylinder to drive the connecting rod to rotate via the connecting frame and sleeve, causing the reclining frame to flip relative to the base frame and adjusting the tilt angle of the reclining frame. The second cylinder drives the front frame to rotate and unfold relative to the base frame via the connecting piece, thereby adjusting the height and angle of the front end of the massage chair frame. The coordinated action of the two cylinders allows the massage chair frame to freely switch between a sitting position, a semi-reclining position, and a flat position, meeting the diverse needs of different users and different usage scenarios. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of a flattenable flexible guide rail structure and a massage chair frame including the structure according to the present invention. Figure 2 This is a side view schematic diagram of a flattenable flexible guide rail structure and a massage chair frame including the structure in this invention. Figure 3 This is a schematic diagram of a flattenable flexible guide rail structure according to the present invention; Figure 4 This is a side view of a planarizable flexible guide rail structure according to the present invention. Figure 5 This is a cross-sectional three-dimensional structural diagram of a flattenable flexible guide rail structure according to the present invention. Figure 6 In this invention Figure 5 A magnified structural diagram at point A; Figure 7 This is a cross-sectional structural diagram of the winding reel and the fixing tube in this invention; Figure 8 This is a schematic diagram of the distribution structure of the rectangular springs in this invention; Figure 9 This is a schematic diagram of the rectangular spring in this invention; Figure 10 This is a bottom-view structural diagram of the walking component in this invention; Figure 11 This is a three-dimensional structural diagram of the walking component in this invention, viewed from below.

[0032] In the diagram, 1. Base frame; 2. Reclining frame; 201. Bending section; 3. Connecting rod; 4. Side plate; 5. Fixing tube; 6. Side connecting rod; 7. Sealing plate; 8. Mounting block; 9. Rectangular spring; 91. Connecting ear; 10. Rewinding wheel; 11. Pull rope; 12. First fixing block; 13. Second fixing block; 14. Limiting block; 15. Connecting block; 16. Drive rod; 17. Stepper motor; 18. Sleeve; 19. Connecting frame; 20. First cylinder; 21. Frame base; 22. Rotating rod; 23. Lower bracket; 24. Movable rod; 25. Front frame; 26. Connecting piece; 27. Second cylinder; 28. Walking assembly; 281. Massager body; 282. Side connecting plate; 283. Crossbar; 284. Walking wheel. Detailed Implementation

[0033] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0034] like Figures 1-11As shown, a flattenable flexible guide rail structure includes a base frame 1. A reclining frame 2 is rotatably connected to one side of the base frame 1. A bending portion 201 is integrally formed at the end of the reclining frame 2 away from the base frame 1. The reclining frame 2 and its bending portion 201 are integrally stamped from high-strength steel plates. Grooves are provided at both the upper and lower ends of the bending portion 201. The grooves extend along the length direction of the bending portion 201. In this embodiment, the reclining frame 2 is integrally stamped from Q235 cold-rolled steel plate or SPCC cold-rolled steel plate with a thickness of 2mm to 3mm. The bending angle range of the bending portion 201 is 0° to 180°. The grooves serve as both weight-reducing grooves to reduce the overall weight of the reclining frame and stress-relieving grooves when the bending portion 201 is bent, so as to prevent fatigue cracks from occurring in the bending portion 201 during repeated bending. A bending assembly is fixedly connected to the inner side of the bending portion 201. The bending assembly includes multiple equidistant bending units, and each bending unit is arranged sequentially along the length direction of the bending portion 201. The bending unit includes two side plates 4, which are fixedly installed on the inner side of the reclining frame 2. The two side plates 4 are arranged in parallel and opposite to each other. A fixing tube 5 is fixedly connected between the two parallel side plates 4. The fixing tube 5 extends horizontally along the width direction of the reclining frame 2, and its two ends are fixedly connected to the two side plates 4 respectively. A side connecting rod 6 is fixedly installed on the side of the side plate 4 away from the reclining frame 2. The side connecting rod 6 is arranged in parallel below the fixing tube 5. The side connecting rod 6 extends horizontally along the width direction of the reclining frame 2, and a sealing plate 7 is fixedly connected to the other end of the side connecting rod 6. The sealing plate 7 is arranged in parallel on one side of the side plate 4. The sealing plate 7 is used to close the internal space of the bending unit and provide support for the side connecting rod 6. Multiple fixing tubes 5 are arranged parallel and equidistantly on the inner side of the reclining frame 2, and the number is odd. In this embodiment, the number of fixing tubes 5 is preferably 5. The specific number can be selected according to the length of the bending part 201 and the required bending accuracy. The middle fixing tube 5 (i.e. the third fixing tube 5) is rotatably connected to the middle of the middle winding wheel 10, and the outer wall of the winding wheel 10 is wound with a pull rope 11 in the opposite direction. The two ends of the pull rope 11 are fixedly connected to the second fixing block 13. The two second fixing blocks 13 are respectively fixedly installed on the outer walls of the two fixing tubes 5 at both ends (i.e. the outer walls of the first and fifth fixing tubes 5). The outer wall of the fixing tube 5 between the middle fixing tube 5 and the outer fixing tube 5 is fixedly connected to the first fixing block 12 (i.e. the outer wall of the second and fourth fixing tubes 5), and the pull rope 11 is installed through the inside of the first fixing block 12. The outer wall of the pull rope 11 is also fixedly connected to the limit block 14, and the limit block 14 is located outside the first fixing block 12.

[0035] like Figure 7As shown, a winding wheel 10 is rotatably connected to the middle part of the fixed tube 5 in the middle position. The two ends of the winding wheel 10 are rotatably connected to the fixed tube 5. Specifically, a through mounting hole is opened in the middle of the fixed tube 5. The winding wheel 10 is fitted into the mounting hole. The two ends of the winding wheel 10 are rotatably connected to the fixed tube 5 through bearings, so that the winding wheel 10 can rotate freely relative to the fixed tube 5. A stepper motor 17 is fixedly installed inside the fixed tube 5, and the stepper motor 17 is arranged along the axial direction of the fixed tube 5. A drive rod 16 is fixedly connected to the output end of the stepper motor 17, and the drive rod 16 is rotatably connected inside the fixed tube 5 and is coaxial with the fixed tube 5. A connecting block 15 is fixedly connected to the outer wall of the drive rod 16, and the connecting block 15 is fixedly installed inside the take-up reel 10. Specifically, the take-up reel 10 has a fitting groove inside that mates with the connecting block 15, and the connecting block 15 is fitted and fixed in the fitting groove, thereby realizing the fixed connection between the drive rod 16 and the take-up reel 10. The stepper motor 17 has a power-off self-locking function. When the stepper motor 17 is powered off, its output shaft maintains the current rotation angle, thereby constraining the drive rod 16 and the winding wheel 10 to maintain the current rotation angle, so that the pull rope 11 maintains the current tightened or released state and maintains the current shape of the bending assembly. The step angle of the stepper motor 17 is preferably 0.9° or 1.8° to ensure precise control of the rotation angle of the winding wheel 10.

[0036] like Figure 8-9 As shown, an installation block 8 is fixedly installed on the outer wall of the side connecting rod 6. A rectangular spring 9 is fixedly connected between two adjacent installation blocks 8. Multiple rectangular springs 9 are arranged alternately along the length of the lying frame 2. The horizontal staggered spacing of adjacent rectangular springs 9 is equal, and the elastic coefficient of each rectangular spring 9 is the same, so that each bending unit is uniformly stressed and deformed synchronously during the process of flattening and bending of the bending assembly. A walking component 28 is provided on the surface of the rectangular spring 9.

[0037] The rectangular spring 9 is arranged in a rectangular spiral shape, and after winding, it forms a continuous and flat spiral top surface. This spiral top surface serves as the walking support track surface of the walking assembly 28. The spiral pitch of the rectangular spring 9 is equal, and the pitch gap between each spiral coil is smaller than the wheel surface width of the walking wheel 284 in the walking assembly 28 to prevent the walking wheel 284 from falling off. The spiral coil of the rectangular spring 9 is set with a rounded transition structure at the rectangular corner to eliminate stress concentration at the winding sharp corner and improve the fatigue life of the spring. The two ends of the rectangular spring 9 are fixedly connected to the connecting ears 91 connected to the mounting block 8. The connecting ears 91 and the mounting block 8 are fixedly connected by bolts or pins to ensure reliable fixation between the rectangular spring 9 and the bending unit.

[0038] In this embodiment, the plane width of the helical top surface of the rectangular spring 9 is greater than the wheel surface width of a single traveling wheel 284 in the traveling assembly 28, and the ratio of the wheel distance between two adjacent traveling wheels 284 to the helical pitch of the rectangular spring 9 is an integer multiple (preferably 2 to 4 times), so that when the traveling wheel 284 rolls on the surface of the rectangular spring 9, at least one complete helical top surface maintains surface contact support with the traveling wheel 284.

[0039] The rectangular spring 9 provides a continuous and uninterrupted walking support surface for the walking assembly 28, and also serves as an elastic reset element when the bending assembly switches from the bending state to the flattened state. Multiple bending units are connected by the rectangular spring 9 to form a flexible whole, so that the walking assembly 28 always keeps in contact with the rectangular spring 9 when walking on the bending assembly surface, avoiding walking gaps and jumping.

[0040] The take-up reel 10 has two take-up directions, forward and reverse. The pull rope 11 is wound in the opposite direction around the outer wall of the take-up reel 10. The so-called "reverse winding" means that the two ends of the pull rope 11 extend from the opposite direction of the take-up reel 10 and are wound around it, so that the two ends of the pull rope 11 can be tightened synchronously when the take-up reel 10 rotates in the forward direction. When the winding wheel 10 rotates in the forward direction, it simultaneously tightens both ends of the pull rope 11, causing the spacing between each fixed tube 5 to decrease evenly, so that the bending assembly switches from the flattened state to the bending state. When the winding wheel 10 rotates in the reverse direction, it simultaneously releases both ends of the pull rope 11. The rectangular spring 9 pushes each fixed tube 5 back to its original position by relying on its own elastic restoring force, so that the bending assembly switches from the bending state to the flattened state.

[0041] The distance between the limiting block 14 and the first fixing block 12 is less than the initial distance between two adjacent fixing tubes 5. When the winding wheel 10 tightens the pull rope 11, the limiting block 14 moves with the pull rope 11 to abut against the first fixing block 12, so as to limit the minimum distance between adjacent fixing tubes 5 and avoid excessive bending of the bending assembly, which would cause structural damage.

[0042] An elastic buffer pad is fixedly provided on the side of the limiting block 14 near the first fixed block 12. When the limiting block 14 abuts against the first fixed block 12, the elastic buffer pad undergoes elastic deformation to absorb the collision energy and reduce the impact noise generated at the moment of contact.

[0043] like Figure 10-11 As shown, the walking assembly 28 includes a massage body 281, which is the massage execution mechanism of the massage chair. It contains a massage motor, a kneading mechanism, and a tapping mechanism (all conventional technologies in the art, and will not be described in detail here). Side plates 282 are fixedly connected to both sides of the bottom of the massage body 281. The two side plates 282 are arranged parallel to each other and extend downwards. Two crossbars 283 are rotatably connected between the two side plates 282. The two crossbars 283 are arranged back and forth along the walking direction of the walking assembly 28 (i.e., the length direction of the reclining frame 2). Two walking wheels 284 are fixedly connected to both ends of each crossbar 283. That is, the walking assembly 28 is provided with a total of four walking wheels 284, forming a four-wheel walking support structure, which ensures the stability of the massage body 281 during walking. The two traveling wheels 284 are arranged in parallel (i.e., the two traveling wheels 284 located at both ends of the same crossbar 283 are parallel to each other), and the gap between the two traveling wheels 284 is smaller than the staggered gap between adjacent rectangular springs 9, so that when the traveling wheels 284 travel on the surface of the rectangular springs 9, they can always maintain effective contact with the rectangular springs 9, and avoid the traveling wheels 284 getting stuck in the gap between adjacent rectangular springs 9. An electric motor (not specifically shown in the figure) is fixedly connected to one end of the crossbar 283. The electric motor is fixedly installed on the outer wall of the side plate 282. The electric motor drives the crossbar 283 to rotate, providing walking power for the walking assembly 28, and realizing the reciprocating motion of the massage body 281 along the guide rail.

[0044] like Figure 1-2 As shown, a massage chair frame includes the aforementioned unfoldable flexible guide rail structure. A connecting rod 3 is fixedly installed inside the reclining frame 2. The connecting rod 3 is horizontally arranged along the width direction of the reclining frame 2, and its two ends are respectively rotatably connected to the corresponding hinge seats arranged inside the base frame 1, thereby realizing the flipping of the reclining frame 2 relative to the base frame 1. A sleeve 18 is fixedly connected to the outer wall of the connecting rod 3, and a connecting frame 19 is fixedly connected to the bottom end of the sleeve 18. The connecting frame 19 is arranged in a "U" shape, and its two side walls are respectively fixedly connected to the two ends of the sleeve 18. A hinge hole is opened in the middle of the bottom wall of the connecting frame 19. The output end of the first cylinder 20 is rotatably connected to the bottom of the connecting frame 19 through the hinge hole. The other end of the first cylinder 20 is rotatably connected to the inside of the frame base 21. Rotating rods 22 are rotatably connected to the middle of both sides of the base frame 1. The two rotating rods 22 are respectively located on the left and right sides of the base frame 1 and extend horizontally along the width direction of the base frame 1. A lower bracket 23 is fixedly installed below the rotating rods 22. The lower bracket 23 has an "H"-shaped structure and includes two parallel longitudinal beams and a crossbeam fixedly connected between the two longitudinal beams. The top ends of the two longitudinal beams are fixedly connected to the corresponding rotating rods 22, and the bottom ends of the two longitudinal beams are fixedly connected to both ends of the movable rod 24. The "H"-shaped structure of the lower bracket 23 ensures a rigid connection between the rotating rods 22 on both sides of the base frame 1, guaranteeing the synchronicity of the two sides of the base frame 1 during rotation. The outer wall of the movable rod 24 is rotatably connected to one end of the frame base 21. A second cylinder 27 is rotatably connected to the middle of the frame 21. The cylinder body end of the second cylinder 27 is rotatably connected to the middle of the frame 21. A connector 26 is rotatably connected to the output end of the second cylinder 27. A front frame 25 is fixedly installed on the top of the connector 26, and the top of the front frame 25 is rotatably connected to the outer side of the base frame 1 away from the reclining frame 2. The first cylinder 20 drives the connecting rod 3 to rotate through the connecting frame 19 and the sleeve 18, causing the reclining frame 2 to flip relative to the base frame 1 and adjusting the tilt angle of the reclining frame 2. The second cylinder 27 drives the base frame 1 to rotate and unfold relative to the frame 21 through the connector 26, so as to adjust the height and angle of the front end of the massage chair frame.

[0045] Working principle: During operation, the stepper motor 17 starts, driving the take-up wheel 10 to rotate via the drive rod 16 and connecting block 15. When it is necessary to switch the bent part 201 on the upper part of the reclining frame 2 from a flat state to a bent state, that is, from a lying posture to a sitting or semi-reclining posture, the stepper motor 17 drives the take-up wheel 10 to rotate forward. The take-up wheel 10 simultaneously tightens the two ends of the pull rope 11 wound in the opposite direction on its outer wall. The two ends of the pull rope 11 are respectively fixedly connected to the outer wall of the fixing tube 5 on the outer side of the two ends through the second fixing block 13. The pull rope 11 is also installed through the first fixing block 12 on the outer wall of each fixing tube 5 in the middle. As the pull rope is pulled... As rope 11 is tightened, the distance between each fixed tube 5 decreases uniformly under the traction of rope 11, and each bending unit gradually moves closer together. The bending assembly smoothly transitions from a flattened state to a bent state. During this process, the limiting block 14 moves with rope 11 to abut against the first fixed block 12, limiting the minimum distance between adjacent fixed tubes 5 and preventing excessive bending that could damage the structure. At the same time, the elastic buffer pad on the limiting block 14 undergoes elastic deformation, absorbing the impact energy at the moment of contact and reducing impact noise. When it is necessary to switch the reclining frame 2 from the bent state back to the flattened state, stepper motor 17 drives the winding wheel 10 in the reverse direction. As the reel rotates, the winding wheel 10 releases both ends of the pull rope 11 simultaneously. At this time, the rectangular springs 9 between each bending unit rely on their own elastic restoring force to push each fixed tube 5 to reset and unfold outward. Multiple rectangular springs 9 are arranged alternately along the length of the reclining frame 2. The horizontal staggered spacing of adjacent rectangular springs 9 is equal and the elastic coefficient of each rectangular spring 9 is the same, so that each bending unit is evenly stressed and deforms synchronously during the reset process. The bending assembly as a whole smoothly switches from the bent state to the flattened state, realizing the complete flattening of the reclining frame 2. When the walking assembly 28 is working, the electric motor drives the crossbar 283 to rotate, driving the walking assembly 28 to move. The wheels 284 travel on the surface of the rectangular springs 9. Since the spiral top surface of the rectangular springs 9 is a continuous and flat walking support track surface, and the gap between the two wheels 284 is smaller than the staggered gap between adjacent rectangular springs 9, the wheels 284 always maintain effective contact with the rectangular springs 9 during the walking process and will not get stuck in the gap between adjacent rectangular springs 9. The walking component 28 can travel continuously along the surface of the rectangular springs 9 on the full stroke of the guide rail, from one end of the bend 201 to the other end, to achieve massage coverage for the user. This completes the working principle of the flexible guide rail structure.

[0046] In summary, this invention utilizes a bending assembly composed of multiple bending units connected by rectangular springs 9. These rectangular springs 9 provide a continuous support surface for the walking assembly 28 and also act as an elastic reset element when the bending assembly transitions from a bent to a flattened state. This allows the bending assembly to possess both flexible deformation and elastic reset functions. The multiple bending units, elastically connected by the rectangular springs 9, form a flexible whole, ensuring that the walking assembly 28 remains in contact with the rectangular springs 9 as it moves across the bending assembly surface. This effectively avoids the problem of gaps at the connection points in traditional rigid transition rails, which can cause the walking assembly 28 to bounce or make noise. It guarantees the smooth and stable operation of the massage mechanism throughout the entire travel of the guide rail, solving the technical problems of easy bouncing, noise, and incomplete flattening of the walking assembly 28 in the transition area of ​​existing massage chair guide rails.

[0047] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A flattenable flexible guide rail structure, comprising a base frame, characterized in that: A reclining frame is rotatably connected to one side of the base frame, and a bending part is integrally formed at the end of the reclining frame away from the base frame. A bending assembly is fixedly connected to the inner side of the bending part, and the bending assembly includes multiple bending units arranged at equal intervals. The bending unit includes two side plates, which are fixedly installed on the inner side of the reclining frame. A fixing tube is fixedly connected between the two parallel side plates, and a side connecting rod is fixedly installed on the side of the side plate away from the reclining frame. The side connecting rod is parallel to the bottom of the fixing tube, and a sealing plate is fixedly connected to the other end of the side connecting rod. The sealing plate is parallel to one side of the side plate. The fixing tubes are arranged in parallel and equidistantly on the inner side of the lying frame, and the number is odd. The middle fixing tube is rotatably connected to the middle part of the middle winding wheel, and the outer wall of the winding wheel is wound with a pull rope in the opposite direction. The two ends of the pull rope are fixedly connected to the second fixing block, and the two second fixing blocks are respectively fixedly installed on the outer walls of the two fixing tubes on the outer sides of the two ends. A first fixing block is fixedly connected to the outer wall of the fixing tube between the middle fixing tube and the outer fixing tube, and a pull rope is installed through the inside of the first fixing block. A limit block is also fixedly connected to the outer wall of the pull rope, and the limit block is located outside the first fixing block. The outer wall of the side connecting rod is fixedly installed with a mounting block, and a rectangular spring is fixedly connected between two adjacent mounting blocks. Multiple rectangular springs are arranged alternately along the length of the reclining frame, with equal horizontal spacing between adjacent rectangular springs, and a walking component is provided on the surface of the rectangular spring. The rectangular spring provides a continuous and uninterrupted walking support surface for the walking assembly, and also serves as an elastic reset element when the bending assembly switches from the bending state to the flattened state. Multiple bending units are connected by rectangular springs to form a flexible whole, so that the walking component always keeps in contact with the rectangular spring when walking on the surface of the bending component, avoiding walking gaps and jumping.

2. The flattenable flexible guide rail structure according to claim 1, characterized in that, A winding wheel is rotatably connected to the middle of the fixed tube in the middle position, and both ends of the winding wheel are rotatably connected to the fixed tube. A stepper motor is fixedly installed inside the fixed tube, and a drive rod is fixedly connected to the output end of the stepper motor. The drive rod is rotatably connected inside the fixed tube, and a connecting block is fixedly connected to the outer wall of the drive rod. The connecting block is fixedly installed inside the winding wheel.

3. The flattenable flexible guide rail structure according to claim 1, characterized in that, The rectangular spring is arranged in a rectangular spiral shape, and both ends of the rectangular spring are fixedly connected to connecting ears that are connected to the mounting block.

4. The flattenable flexible guide rail structure according to claim 1, characterized in that, The reclining frame and its bending section are integrally stamped from high-strength steel plates, and grooves are provided at both the upper and lower ends of the bending section, with the grooves extending along the length of the bending section. The groove serves both as a weight-reducing groove to lighten the overall weight of the reclining frame and as a stress-relieving groove during bending of the bending section to prevent fatigue cracks from forming in the bending section during repeated bending.

5. The flattenable flexible guide rail structure according to claim 1, characterized in that, The walking assembly includes a massage body, and side plates are fixedly connected to both sides of the bottom of the massage body. Two crossbars are rotatably connected between the two side plates, and two walking wheels are fixedly connected to both ends of the crossbars. The two wheels are arranged in parallel, and the gap between the two wheels is smaller than the staggered spacing between adjacent rectangular springs; An electric motor is fixedly connected to one end of the crossbar, and the electric motor is fixedly installed on the outer wall of the side plate.

6. The flattenable flexible guide rail structure according to claim 1, characterized in that, The winding reel has two winding directions, forward and reverse, with the pull rope wound in opposite directions around the outer wall of the winding reel; When the winding wheel rotates in the forward direction, it simultaneously tightens both ends of the pull rope, causing the distance between each fixed tube to decrease evenly, so that the bending assembly switches from a flattened state to a bent state. When the winding wheel rotates in the opposite direction, it releases both ends of the pull rope synchronously. The rectangular springs rely on their own elastic restoring force to push each fixed tube to reset, so that the bending assembly switches from the bending state to the flattened state.

7. The flattenable flexible guide rail structure according to claim 1, characterized in that, The distance between the limiting block and the first fixing block is less than the initial distance between two adjacent fixing tubes; When the winding wheel tightens the pull rope, the limit block moves with the pull rope to abut against the first fixed block to limit the minimum distance between adjacent fixed tubes and prevent the bending assembly from being over-bent, which could cause structural damage.

8. The flattenable flexible guide rail structure according to claim 7, characterized in that, An elastic buffer pad is fixedly provided on the side of the limiting block near the first fixed block. When the limiting block abuts against the first fixed block, the elastic buffer pad undergoes elastic deformation to absorb the collision energy and reduce the impact noise generated at the moment of contact.

9. A massage chair frame, characterized in that, The massage chair frame includes a flattenable flexible guide rail structure as described in any one of claims 1-8. A connecting rod is fixedly installed inside the reclining frame and is rotatably connected to the inner side of the base frame. A sleeve is fixedly connected to the outer wall of the connecting rod and a connecting frame is fixedly connected to the bottom end of the sleeve. The output end of a first cylinder is rotatably connected to the lower part of the connecting frame and a frame base is rotatably connected to the other end of the first cylinder. Rotating rods are rotatably connected to the middle of both sides of the base frame, and a lower bracket is fixedly installed below the rotating rods. A movable rod is fixedly connected to the bottom end of the lower bracket, and the outer wall of the movable rod is rotatably connected to one end of the frame base. The middle part of the frame is also rotatably connected to a second cylinder, and the output end of the second cylinder is rotatably connected to a connector. The top of the connector is fixedly installed with a front frame, and the top of the front frame is rotatably connected to the outer side of the base frame away from the reclining frame. The first cylinder drives the connecting rod to rotate through the connecting frame and the sleeve, causing the reclining frame to flip relative to the base frame and adjust the tilt angle of the reclining frame; The second cylinder drives the base frame to rotate and unfold relative to the frame via a connector, so as to adjust the height and angle of the front end of the massage chair frame.

10. A massage chair frame according to claim 9, characterized in that, The lower bracket is configured in an "H" shape, comprising two parallel longitudinal beams and a crossbeam fixedly connected between the two longitudinal beams. The top ends of the two longitudinal beams are fixedly connected to the rotating rods on the corresponding sides, and the bottom ends of the two longitudinal beams are fixedly connected to the two ends of the movable rod.

Images