Massage machine core and massage chair

Abstract

The massage machine core comprises a machine body, a first massage arm, a second massage arm and a driving device, the driving device comprises a first driving shaft and a second driving shaft, and the first massage arm and the second massage arm are both rotationally attached to the first driving shaft; the driving device further comprises a first connecting member, a second connecting member and a third connecting member, the first connecting member is rotationally attached to the first driving shaft and is connected with the first massage arm, the second connecting member is rotationally attached to the first driving shaft and is connected with the second massage arm, and the third connecting member is rotationally attached to the second driving shaft and is connected with the first connecting member and the second connecting member respectively; the first driving shaft and the second driving shaft can respectively drive the first massage arm and the second massage arm to generate different movement tracks, so that different massage actions are realized.

Description

Technical Field

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

[0002] As living standards improve, the demand for massage is becoming increasingly widespread. As the core component of massage equipment, the massage mechanism directly determines the massage effect and user experience. Specifically, the massage arm device within the massage mechanism can simulate massage techniques such as kneading, tapping, and acupressure.

[0003] Existing massage mechanisms typically employ a single drive shaft, with the massage arms directly mounted on it. An eccentric wheel or tilting bushing causes the massage arms to oscillate as they rotate with the shaft, thus providing massage. While this structure achieves basic massage functions, its movement trajectory and motion patterns are limited by the fixed transmission relationship of a single drive source. This makes it difficult to flexibly switch between or combine various massage techniques on the same mechanism, resulting in a lack of realism and richness in the massage experience.

[0004] Therefore, it is necessary to propose a new technical solution to overcome the shortcomings of existing technologies. Summary of the Invention

[0005] To solve the above problems, the present invention provides a massage mechanism and a massage chair, wherein the first drive shaft and the second drive shaft can respectively drive the first massage arm and the second massage arm to produce different motion trajectories, thereby realizing different massage actions.

[0006] This invention provides a massage mechanism, comprising a body, a first massage arm, a second massage arm, and a driving device. The driving device includes a first drive shaft and a second drive shaft, and both the first and second massage arms are rotatably attached to the first drive shaft. The driving device further includes: The first linkage is rotatably attached to the first drive shaft and is linked to the first massage arm; The second linkage is rotatably attached to the first drive shaft and is linked to the second massage arm; The third linkage is rotatably attached to the second drive shaft and is linked to the first linkage and the second linkage respectively; Wherein, when the first drive shaft is configured to drive the first massage arm and the second massage arm to perform massage actions, the first linkage and the second linkage respectively restrict the first massage arm and the second massage arm from rotating with the first drive shaft; When the second drive shaft is configured to drive the first massage arm and the second massage arm to perform massage actions, the second drive shaft drives the first linkage and the second linkage respectively through the third linkage, thereby driving the first massage arm and the second massage arm to move.

[0007] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0008] Optionally, the third linkage includes: A first link, one end of which is rotatably attached to the second drive shaft, and the other end of which is pivotally connected to the second linkage; and The second link is pivotally connected to the second linkage and the first link, respectively; The second link is pivotally connected to the first link at its midpoint.

[0009] Optionally, the rotation axis of the first linkage and the first drive shaft, as well as the rotation axis of the second linkage and the first drive shaft, both coincide with the axis of the first drive shaft. The axis of the first drive shaft, the axis of the second drive shaft, the rotation axis of the first connecting rod and the first linkage, the rotation axis of the first connecting rod and the second connecting rod, and the rotation axis of the second connecting rod and the second linkage are all arranged in parallel.

[0010] Optionally, a portion of the structure of the first linkage, a portion of the structure of the second linkage, a portion of the structure of the first link, and a portion of the structure of the second link constitute a four-bar linkage.

[0011] Optionally, of the first massage arm and the first linkage, one has a first limiting slider and the other has a first limiting groove that cooperates with the first limiting slider. The extension path of the first limiting groove is roughly parallel to the axis of the first drive shaft.

[0012] Optionally, one of the second massage arm and the second linkage has a second limiting slider, and the other has a second limiting groove that cooperates with the second limiting slider.

[0013] Optionally, the second limiting groove extends along the length direction of the second massage arm; The second limiting slider is a cylindrical structure that extends into the second limiting groove.

[0014] Optionally, the second massage arm has a rotating part that rotates about a set axis, and the second limiting groove is formed in the rotating part and extends along the set axis.

[0015] Optionally, the first drive shaft has a tilting cam, and both the first massage arm and the second massage arm are rotatably attached to the tilting cam; The second drive shaft has an eccentric component, and the third linkage is rotatably attached to the eccentric component.

[0016] The present invention also provides a massage chair, including the massage mechanism described above.

[0017] This invention discloses a massage mechanism and a massage chair. A first drive shaft and a second drive shaft can respectively drive a first massage arm and a second massage arm to produce different motion trajectories, thereby achieving different massage actions. Specifically, when the first massage action is required, the first drive shaft rotates. At this time, a first linkage and a second linkage respectively restrict and guide the movement of the first and second massage arms, thereby simulating a kneading massage action. When switching to the second massage action, the second drive shaft rotates, driving a third linkage. The third linkage drives the first and second linkages, thereby causing the first and second massage arms to move, thus simulating a tapping massage action. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0019] Figure 1 This is a schematic diagram of the structure of the massage mechanism in one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of some structures in a massage mechanism; Figure 3 for Figure 2 A schematic diagram of the massage mechanism with parts of the body omitted. Figure 4 for Figure 3 A partial structural diagram of the drive unit; Figure 5 for Figure 3 A partial structural diagram of the drive unit; Figure 6 for Figure 3 Schematic diagram of the middle section; Figure 7 for Figure 6 Sectional view in; Figure 8 for Figure 7 A schematic diagram of the structure of part A in the diagram; Figure 9 for Figure 6 A cross-sectional view of the second massage arm; Figure 10 for Figure 2 A structural schematic diagram of the massage mechanism from another perspective; Figure 11 for Figure 10 A schematic diagram of the massage mechanism in a collapsed state; Figure 12 for Figure 3 A schematic diagram of the collapse mechanism; Figure 13 for Figure 12 A structural schematic diagram of the central collapse mechanism from another perspective; Figure 14 for Figure 12 A schematic diagram of the collapse mechanism when the massage arm is in the massage position; Figure 15 for Figure 12 A schematic diagram of the collapse mechanism when the massage arm is in a near-safe position; Figure 16 for Figure 12 A schematic diagram of the collapse mechanism when the massage arm is in a safe position.

[0020] Explanation of reference numerals in the attached figures: 100. Massage mechanism; 10. Body; 11. Reception compartment; 12. Fixed base; 13. Guide rod; 14. Movable base; 15. Guide groove; 20. First massage arm; 21. First arm section; 22. First massage head; 23. First limiting slider; 30. Second massage arm; 31. Second arm section; 32. Second massage head; 33. Second limiting slide groove; 34. Rotating part; 35. Rotating groove; 40. Drive unit; 41. First drive shaft; 411. Inclined cam; 42. Second drive shaft; 421. Eccentric component; 43. First linkage; 431. First limiting slide groove; 44. Second linkage; 441. Second limiting slider; 45. Third linkage; 451. First connecting rod; 452. Second connecting rod; 46. First motor; 461. First worm; 462. First worm wheel; 463. Second worm; 464. Second worm wheel; 47. Second motor; 471. First drive wheel; 472. Second drive wheel; 473. Third drive wheel; 474. Fourth drive wheel; 475. First transmission belt; 476. Second transmission belt; 60. Collapsible mechanism; 61. Transmission screw; 62. Transmission nut; 63. Nut locking device; 631. Rack; 632. Gear; 633. Locking spring; 64. Mounting base; 641. Limiting part; 65. Third motor; 651. Third worm gear; 652. Third worm. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] Unless otherwise defined, the technical or scientific terms used in this patent document shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this patent specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or its equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. These terms are only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] like Figures 1 to 9 As shown, this application provides a massage mechanism 100, including a body 10, a first massage arm 20, a second massage arm 30, and a drive device 40. The drive device 40 includes a first drive shaft 41 and a second drive shaft 42, with both the first massage arm 20 and the second massage arm 30 rotatably attached to the first drive shaft 41. The drive device 40 also includes a first linkage 43, a second linkage 44, and a third linkage 45. The first linkage 43 is rotatably attached to the first drive shaft 41 and moves in conjunction with the first massage arm 20; the second linkage 44 is rotatably attached to the first drive shaft 41 and moves in conjunction with the second massage arm; and the third linkage 45 is rotatably attached to the second drive shaft 42. And respectively linked with the first linkage 43 and the second linkage 44; wherein, when the first drive shaft 41 is configured to drive the first massage arm 20 and the second massage arm 30 to perform massage actions, the first linkage 43 and the second linkage 44 respectively restrict the first massage arm 20 and the second massage arm 30 to rotate with the first drive shaft 41; wherein, when the second drive shaft 42 is configured to drive the first massage arm 20 and the second massage arm 30 to perform massage actions, the second drive shaft 42 drives the first linkage 43 and the second linkage 44 respectively through the third linkage 45, thereby driving the first massage arm 20 and the second massage arm 30 to move.

[0026] The first drive shaft 41 and the second drive shaft 42 can respectively drive the first massage arm 20 and the second massage arm 30 to produce different motion trajectories, thereby realizing different massage actions. Specifically, when the first massage action is required, the first drive shaft 41 rotates, at which time the first linkage 43 and the second linkage 44 respectively restrict and guide the movement of the first massage arm 20 and the second massage arm 30, thereby simulating a kneading massage action; when it is necessary to switch to the second massage action, the second drive shaft 42 rotates, the second drive shaft 42 drives the third linkage 45, the third linkage 45 respectively drives the first linkage 43 and the second linkage 44, thereby driving the first massage arm 20 and the second massage arm 30 to move, thereby simulating a tapping massage action.

[0027] In this embodiment, as Figures 1 to 2 As shown, the structure of the body 10 is not strictly limited, as long as the body 10 can support the first massage arm 20, the second massage arm 30, and the drive device 40. The body 10 has a housing compartment 11 inside, and at least some components of the drive device 40 are arranged in the housing compartment 11, which not only achieves effective storage of the drive device 40, but also ensures the compactness of the overall structure and the stability of operation.

[0028] In this embodiment, as Figures 1 to 3 , Figure 6 , Figure 7 and Figure 9 As shown, the first massage arm 20 includes a first arm portion 21 and a first massage head 22. The first arm portion 21 is rotatably attached to the first drive shaft 41; the first massage head 22 is attached to the end of the first arm portion 21 facing away from the first drive shaft 41. The second massage arm 30 includes a second arm portion 31 and a second massage head 32. The second arm portion 31 is rotatably attached to the first drive shaft 41; the second massage head 32 is attached to the end of the second arm portion 31 facing away from the first drive shaft 41. Both the first arm portion 21 and the second arm portion 31 have a rod-like structure.

[0029] In this embodiment, as Figures 2 to 4 and Figures 6 to 7 As shown, the first drive shaft rotates under drive; the first drive shaft 41 has an inclined cam 411, and the first massage arm 20 and the second massage arm 30 are rotatably attached to the inclined cam 411, so that the first drive shaft 41 drives the first massage arm 20 and the second massage arm 30 to swing through the inclined cam 411, thereby driving the first massage arm 20 and the second massage arm 30 to perform kneading massage actions. The first drive shaft 41 is rotatably mounted on the body 10 through a structure such as a bearing seat; the inclined cam 411 is sleeved on the outside of the first drive shaft 41, and the first massage arm 20 and the second massage arm 30 are both sleeved on the inclined cam 411 and can rotate around the inclined cam 411.

[0030] To drive the first drive shaft to rotate; refer to one embodiment, such as Figures 2 to 4 and Figures 6 to 7 As shown, the drive device 40 also includes a first motor 46, a first worm 461, a first worm wheel 462, a second worm 463, and a second worm wheel 464. The first worm 461 is fixedly connected to the output shaft of the first motor 46, and the first worm 461 meshes with the first worm wheel 462 for transmission. The first worm wheel 462 is linked to the second worm 463, and the second worm 463 meshes with the second worm wheel 464 for transmission. The second worm wheel 464 is fixedly connected to the first drive shaft 41. The first motor 46 transmits its rotational power to the first drive shaft 41 through a two-stage worm gear transmission, achieving stable driving and precise control of the drive shaft. The first motor 46 is fixedly connected to the machine body 10 by bolts or welding. The first worm wheel 462 is fixedly connected to the second worm 463, enabling the first worm wheel 462 to drive the second worm 463.

[0031] In this embodiment, as Figures 2 to 3 and Figures 5 to 7As shown, the second drive shaft rotates under drive; the second drive shaft 42 has an eccentric member 421, and the third linkage member 45 is rotatably attached to the eccentric member 421, so that the second drive shaft 42 drives the third linkage member 45 through the eccentric member, thereby driving the first massage arm 20 and the second massage arm 30 to perform a tapping massage action. The second drive shaft 42 is rotatably mounted on the body 10 through a structure such as a bearing seat; the third linkage member 45 is sleeved on the outside of the eccentric member 421. The eccentric member 421 is either an eccentric wheel sleeved on the outside of the second drive shaft 42 or an eccentric section fixed to the second drive shaft 42.

[0032] To drive the second drive shaft to rotate; refer to one embodiment, such as Figures 2 to 3 and Figures 5 to 7 As shown, the drive device 40 also includes a second motor 47, a first drive wheel 471, a second drive wheel 472, a third drive wheel 473, a fourth drive wheel 474, a first transmission belt 475, and a second transmission belt 476; the output shaft of the second motor 47 is fixedly connected to the first drive wheel 471, and the first drive wheel 471 is connected to the second drive wheel 472 via the first transmission belt 475; the second drive wheel 472 and the third drive wheel 473 are coaxially arranged, the third drive wheel 473 is connected to the fourth drive wheel 474 via the second transmission belt 476, and the fourth drive wheel 474 is fixedly connected to the second drive shaft 42 coaxially. The second motor 47 drives the first drive wheel 471 to rotate synchronously; the first drive wheel 471 transmits power to the second drive wheel 472 through the first transmission belt 475, and the second drive wheel 472 drives the third drive wheel 473 to maintain synchronous rotation; the third drive wheel 473 then drives the fourth drive wheel 474 to rotate through the second transmission belt 476; finally, the fourth drive wheel 474 directly drives the second drive shaft 42 to rotate. The second motor 47 is fixed inside the machine body 10 by bolts or welding; the second drive wheel 472 and the third drive wheel 473 are coaxially fixed.

[0033] In this embodiment, as Figures 6 to 8As shown, of the first massage arm 20 and the first linkage 43, one has a first limiting slider 23, and the other has a first limiting groove 431 that cooperates with the first limiting slider 23. This prevents the first massage arm 20 from rotating together with the first drive shaft 41, ensuring that the first drive shaft 41 drives the first massage arm 20 to move only through the tilting cam 411. The extension path of the first limiting groove 431 is approximately parallel to the axis of the first drive shaft 41; "approximately parallel" means that the included angle between them is approximately parallel within the allowable machining and assembly tolerances, not that strict geometric parallelism is required. In this embodiment, the first limiting slider 23 is disposed on the first massage arm 20 and located at the end of the first arm portion 21 facing away from the first massage head 22; the first limiting groove is disposed on the first linkage 43.

[0034] In this embodiment, as Figure 2 , Figure 3 , Figure 6 as well as Figure 9 As shown, of the second massage arm 30 and the second linkage 44, one has a second limiting slider 441, and the other has a second limiting groove 33 that cooperates with the second limiting slider 441, to prevent the second massage arm 30 from rotating together with the first drive shaft 41, ensuring that the first drive shaft 41 drives the second massage arm 30 to move only through the tilting cam 411. In this embodiment, the second limiting slider 441 is disposed on the second linkage 44, and the second limiting groove 33 is located on the second massage arm.

[0035] In this embodiment, as Figure 2 , Figure 3 , Figure 6 as well as Figure 9 As shown, the second limiting groove 33 extends along the length of the second massage arm 30, and the second limiting slider 441 is a cylindrical structure extending into the second limiting groove 33. This ensures that the second massage arm 30 and the second linkage 44 have multiple degrees of freedom, thus preventing the second linkage 44 from jamming the second massage arm 30 when the first drive shaft 41 drives the second massage arm 30 via the tilting cam 411. Furthermore, the second massage arm 30 has a rotating part 34 that rotates around a set axis. The second limiting groove is formed in the rotating part 34 and extends along the set axis. Specifically, the second arm part 31 has a rotating groove 35, and the rotating part 34 is rotatably mounted within the rotating groove 35.

[0036] In this embodiment, as Figure 2 , Figure 3 and Figure 6As shown, the third linkage 45 includes a first linkage 451 and a second linkage 452. One end of the first linkage 451 is rotatably attached to the second drive shaft 42, and the other end is pivotally connected to the second linkage 44. The second linkage 452 is pivotally connected to both the second linkage 44 and the first linkage 451. The second linkage 452 is pivotally connected to the first linkage 451 at a midpoint. The rotational motion of the second drive shaft 42 is converted into the swinging motion of the first linkage 43 and the second linkage 44 via the first linkage 451 and the second linkage 452, thereby driving the first massage arm 20 and the second massage arm 30 to synchronously perform a tapping action, while ensuring the smoothness and reliability of the motion transmission.

[0037] In this embodiment, as Figure 2 , Figure 3 and Figure 6 As shown, the rotation axes of the first linkage 43 and the first drive shaft 41, and the rotation axes of the second linkage 44 and the first drive shaft 41, are all coincident with the axis of the first drive shaft 41, thereby ensuring that the first linkage 43 and the second linkage 44 can rotate stably coaxially with the first drive shaft 41. The axes of the first drive shaft 41, the second drive shaft 42, the rotation axes of the first connecting rod 451 and the first linkage 43, the rotation axes of the first connecting rod 451 and the second connecting rod 452, and the rotation axes of the second connecting rod 452 and the second linkage 44 are all arranged in parallel, which not only allows for structural layout but also ensures the coordination and consistency of the movement of each component during power transmission, avoiding motion interference or jamming caused by axis misalignment.

[0038] In this embodiment, as Figure 2 , Figure 3 and Figure 6 As shown, a portion of the structure of the first linkage 43, a portion of the structure of the second linkage 44, a portion of the structure of the first link 451, and a portion of the structure of the second link 452 constitute a four-bar linkage. Specifically, the pivot points between the first linkage 43 and the first link 451, the pivot points between the first link 451 and the second link 452, the pivot points between the second link 452 and the second linkage 44, and the pivot points between the second linkage 44 and the first linkage 43 are sequentially connected end-to-end to form a closed four-bar linkage. This four-bar linkage structure can convert the rotational motion input from the second drive shaft 42 via the first link 451 into coordinated oscillation between the first linkage 43 and the second linkage 44, thereby ensuring that the first massage arm 20 and the second massage arm 30 maintain a synchronous and regular motion trajectory during the tapping massage action, while improving the motion accuracy and structural stability of the overall transmission mechanism.

[0039] In this embodiment, as Figures 1 to 13 As shown, the body 10 includes a fixed base 12 and a movable base 14. A first drive shaft 41 is rotatably attached to the fixed base 12, and a second drive shaft 42 is rotatably attached to the movable base 14. A collapse mechanism 60 is provided between the movable base 14 and the fixed base 12. The collapse mechanism 60 includes a transmission screw 61 connected to the fixed base 12, a transmission nut 62 cooperating with the transmission screw 61, and a nut locking device 63 provided on the movable base 14. The nut locking device 63 is used to release the transmission nut 62 when the abuse force on the car exceeds a preset threshold, thereby releasing the rotation restriction on the massage arm so that the massage arm collapses to a safe position.

[0040] In this embodiment, as Figures 1 to 3 as well as Figures 10 to 11 As shown, the structures of the fixed base 12 and the movable base 14 are not strictly limited. To limit the movement path of the movable base 14; referring to one embodiment, as... Figure 10 As shown, a guide structure is provided between the movable seat 14 and the fixed seat 12, and the guide structure is configured to guide the movement path of the movable seat 14. The guide structure includes a guide rod 13 and a guide groove 15; one of the guide rod 13 and the guide groove 15 is provided in the fixed seat 12, and the other is provided in the movable seat 14. Specifically, the guide rod 13 is fixed to the fixed seat 12, and the movable seat 14 has a guide groove 15 through which the guide rod 13 passes.

[0041] In this embodiment, as Figures 1 to 3 as well as Figures 10 to 11 As shown, the collapse mechanism 60 also includes a third motor 65, which directly or indirectly drives the transmission screw 61 to rotate around its axis. The transmission screw 61 has an external thread, and the transmission nut 62 has a threaded hole that engages with the external thread. When the third motor 65 drives the transmission screw 61 to rotate, the transmission nut 62 moves along the axial direction of the transmission screw 61 under the drive of the transmission screw 61, and then pushes the movable seat 14 to translate along a preset guide path through the nut locking device 63.

[0042] When the movable seat 14 moves, the movable seat 14 drives the third linkage component rotatably attached to the second drive shaft 42 to move synchronously. The third linkage component is linked with the first linkage component and the second linkage component rotatably attached to the first drive shaft 41, thereby converting the linear displacement of the movable seat 14 into the rotational motion of the first linkage component and the second linkage component. The first linkage component drives the first massage arm 20 and the second linkage component drives the second massage arm 30, so that the two sets of massage arms deflect around the inclined cam 411 on the drive shaft, so that the first massage head 22 and the second massage head 32 move away from each other and move closer to each other.

[0043] In this embodiment, as Figures 10 to 11As shown, the third motor 65 is fixedly mounted on the fixed base 12. The collapsible mechanism 60 also includes a third worm gear 651 and a third worm 652. The third worm 652 is fixedly connected to the output shaft of the third motor 65, and the third worm gear 651 and the third worm 652 mesh and drive each other. The transmission screw 61 is fixedly connected to the third worm 652 and is coaxially arranged. The third motor 65 drives the third worm 652 to rotate through its output shaft, and transmits power to the transmission screw 61 through the meshing transmission of the third worm gear 651 and the third worm 652, causing the transmission screw 61 to rotate around its axis, thereby driving the transmission nut 62 to move axially along the transmission screw 61.

[0044] In this embodiment, as Figures 10 to 11 As shown, the movable seat 14 is provided with a mounting base 64, and a sliding groove is formed on the mounting base 64; the transmission nut 62 is slidably disposed in the sliding groove and can slide along the sliding groove. The sliding groove is used to limit the movement path of the transmission nut 62, so that it moves in a preset direction.

[0045] In this embodiment, as Figures 10 to 16 As shown, the nut locking device 63 includes a rack 631, a gear 632, and a locking spring 633. The gear 632 meshes with the rack 631 and is respectively disposed on the movable seat 14 and the transmission nut 62. The locking spring 633 is used to apply a locking force to the gear 632. The connection position between the locking spring 633 and the gear 632 is eccentrically set relative to the rotation center of the gear 632. When the abuse force on the vehicle exceeds a preset threshold, the gear 632 rotates against the biasing force of the locking spring 633 until the connection position passes the farthest or closest position relative to the rack 631. Then, the biasing force is converted into a release force to drive the gear 632 to continue rotating, thereby releasing the transmission nut 62.

[0046] When the massage arm is in the massage position, the locking spring 633 applies a biasing force to the gear 632, which keeps the gear 632 pressed against the rack 631. The transmission nut 62 is locked and cannot move axially along the transmission screw 61, so that the massage arm can be kept in the normal working position under the constraint of the linkage structure. When the abusive force on the car exceeds the preset threshold, the impact force is transmitted through the massage arm and the movable seat 14 to the transmission nut 62. The transmission nut 62 forces the gear 632 to overcome the biasing force of the locking spring 633 and begin to rotate relative to the rack 631. During the rotation of the gear 632, the position of the eccentric connection point continues to change. When the connection point passes the critical position that is farthest or closest to the rack 631, the biasing force of the locking spring 633 reverses, changing from the locking force that originally hindered the rotation of the gear 632 to the releasing force that drives the gear 632 to continue rotating. This causes the transmission nut 62 to quickly disengage along the transmission screw 61, thereby releasing the rotation restriction on the massage arm. The massage arm collapses to a safe position under the guidance of the linkage structure, completing the passive safety protection action.

[0047] When the massage arm is in the massage position, the eccentrically positioned locking spring 633 consistently applies a locking bias force to the gear 632, pointing towards the rack 631, reliably locking the transmission nut 62 and maintaining the massage arm in the set working position, ensuring the normal operation of the massage function. When the vehicle experiences a collision or other abusive force exceeding a preset threshold, this eccentric structure causes the spring force to automatically reverse from a locking force to a release driving force after the gear 632 crosses the critical position. This allows for rapid release of the transmission nut 62 without an additional drive source, enabling the massage arm to quickly collapse to a safe position, effectively preventing secondary injuries to occupants from the massage mechanism 100 during a collision. The collapse mechanism 60 in this massage mechanism 100 has a simple structure and reliable response; its purely mechanical triggering eliminates the need for an electronic control system, improving the reliability and real-time performance of passive safety protection.

[0048] In this embodiment, as Figures 10 to 16 As shown, the movable base 14 has a limiting part 641. The transmission nut 62 abuts against the limiting part 641 under the biasing force of the locking spring 633, so that the massage arm is in the massage position. When the massage arm is in the massage position, the connection position and the rotation axis of the gear 632 are spaced apart along the movement path of the transmission nut 62, so that the biasing force of the locking spring 633 forms a locking torque on the gear 632, ensuring that the transmission nut 62 is reliably abutted against the limiting part 641, preventing the massage arm from accidentally displacing under non-collapse conditions. The limiting part 641 is located on the mounting base 64.

[0049] In this embodiment, as Figures 10 to 16 As shown, rack 631 is fixed to transmission nut 62 and extends along the movement path of transmission nut 62; gear 632 is rotatably attached to movable seat 14 around a fixed axis. Gear 632 and rack 631 mesh with each other to lock the axial position of transmission nut 62 under the biasing action of locking spring 633. There may be one or two racks 631; there may be one or two gears 632. Specifically, there are two racks 631, each located on one side of transmission nut 62; there are two gears 632, each meshing with a corresponding rack 631, thus forming a double locking structure on both sides of transmission nut 62. This ensures reliable axial locking of transmission nut 62, effectively improving the locking stability and anti-eccentric load capability of collapsible mechanism 60.

[0050] In this embodiment, as Figures 10 to 16As shown, there are two locking springs 633, each connected to the movable seat 14 and the corresponding gear 632, so that each locking spring 633 independently applies a biasing force to the corresponding gear 632, thereby ensuring that the gear 632 always presses against the rack 631 under the action of the locking spring 633, achieving reliable locking of the transmission nut 62. Of course, in other embodiments, the locking spring 633 is a single piece; the two ends of the locking spring 633 are connected to the corresponding gears 632 to form an elastic biasing force between the two gears 632.

[0051] The following describes the collapse process of the massage mechanism 100: When a car experiences an accident such as a collision, and the transmitted abusive force (impact force) exceeds a preset threshold, the impact force is transmitted through the massage arm to the movable seat 14, and then from the movable seat 14 to the transmission nut 62. The axial thrust on the transmission nut 62 is sufficient to overcome the locking torque applied to the gear 632 by the locking spring 633, forcing the gear 632 to begin rotating relative to the rack 631 fixed to the transmission nut 62. During the rotation of the gear 632, the eccentric connection position between the locking spring 633 and the gear 632 continuously changes; once this connection position crosses the critical position of the farthest (or closest) point relative to the rack 631, the direction of the biasing force of the locking spring 633 is reversed, changing from a locking force that hinders the rotation of the gear 632 to a releasing force that drives the gear 632 to continue rotating. Under the action of this releasing force, the gear 632 accelerates its rotation, quickly releasing the meshing constraint between the gear 632 and the rack 631, thereby releasing the transmission nut 62. The release of the transmission nut 62 releases the axial lock on the movable seat 14, and the movable seat 14 quickly translates along the guide structure on the fixed seat 12 under the action of residual collapsing force. The movement of the movable seat 14 is transmitted through the linkage structure, driving the first massage arm 20 and the second massage arm 30 to rotate and collapse to a safe position, so that the massage mechanism 100 can make room for the occupant in time, avoiding secondary injury to the occupant in a collision.

[0052] Once the collision risk has been eliminated, the massage mechanism 100 needs to be restored to its normal working state through a system reset operation; the reset process of the massage mechanism 100 is described below: The third motor 65 starts, driving the transmission screw 61 to rotate. The transmission nut 62 moves axially along the transmission screw 61 under the action of the thread, and synchronously moves the movable seat 14 through the unlocked nut locking device 63 until the movable seat 14 reaches its travel limit position due to the limitation of the fixed seat 12. At this point, the massage arm roughly returns to its massage working position. Subsequently, the third motor 65 continues to drive the transmission screw 61 to rotate. Under the continuous action of the thread thrust, the transmission nut 62 overcomes the biasing force of the locking spring 633, slides relative to the movable seat 14, and resets until the biasing force of the locking spring 633 transforms back into a locking force, reliably locking the transmission nut 62 in the initial locked position, completing the reset.

[0053] like Figures 1 to 16 As shown, the present invention also provides a massage chair, including the massage mechanism 100 as described in the above embodiments.

[0054] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A massage mechanism, comprising a body, a first massage arm, a second massage arm, and a driving device, wherein the driving device includes a first drive shaft and a second drive shaft, and both the first and second massage arms are rotatably attached to the first drive shaft; characterized in that, The drive device further includes: The first linkage is rotatably attached to the first drive shaft and is linked to the first massage arm; The second linkage is rotatably attached to the first drive shaft and is linked to the second massage arm; The third linkage is rotatably attached to the second drive shaft and is linked to the first linkage and the second linkage respectively; Wherein, when the first drive shaft is configured to drive the first massage arm and the second massage arm to perform massage actions, the first linkage and the second linkage respectively restrict the first massage arm and the second massage arm from rotating with the first drive shaft; When the second drive shaft is configured to drive the first massage arm and the second massage arm to perform massage actions, the second drive shaft drives the first linkage and the second linkage respectively through the third linkage, thereby driving the first massage arm and the second massage arm to move.

2. The massage mechanism according to claim 1, characterized in that, The third linkage includes: A first link, one end of which is rotatably attached to the second drive shaft, and the other end of which is pivotally connected to the second linkage; and The second link is pivotally connected to the second linkage and the first link, respectively; The second link is pivotally connected to the first link at its midpoint.

3. A massage mechanism according to claim 2, characterized in that, The rotation axis of the first linkage and the first drive shaft, as well as the rotation axis of the second linkage and the first drive shaft, both coincide with the axis of the first drive shaft. The axis of the first drive shaft, the axis of the second drive shaft, the axis of rotation of the first connecting rod and the first linkage, the axis of rotation of the first connecting rod and the second connecting rod, and the axis of rotation of the second connecting rod and the second linkage are all arranged in parallel.

4. A massage mechanism according to claim 3, characterized in that, The partial structure of the first linkage, the partial structure of the second linkage, the partial structure of the first link, and the partial structure of the second link constitute a four-bar linkage structure.

5. A massage mechanism according to claim 1, characterized in that, Of the first massage arm and the first linkage, one has a first limiting slider and the other has a first limiting groove that cooperates with the first limiting slider. The extension path of the first limiting slide is roughly parallel to the axis of the first drive shaft.

6. A massage mechanism according to claim 1, characterized in that, Of the second massage arm and the second linkage, one has a second limiting slider and the other has a second limiting groove that cooperates with the second limiting slider.

7. A massage mechanism according to claim 6, characterized in that, The second limiting groove extends along the length of the second massage arm; The second limiting slider is a cylindrical structure that extends into the second limiting groove.

8. A massage mechanism according to claim 6 or 7, characterized in that, The second massage arm has a rotating part that rotates about a set axis, and the second limiting groove is formed in the rotating part and extends along the set axis.

9. A massage mechanism according to claim 1, characterized in that, The first drive shaft has a tilting cam, and both the first massage arm and the second massage arm are rotatably attached to the tilting cam; The second drive shaft has an eccentric component, and the third linkage is rotatably attached to the eccentric component.

10. A massage chair, characterized in that, Includes the massage mechanism as described in any one of claims 1 to 9.

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