Shoulder and neck massage machine core and transmission structure thereof

Abstract

The utility model discloses a shoulder and neck massage machine core and a transmission structure thereof, the transmission structure comprises a driving motor, a kneading transmission mechanism and a beating transmission mechanism, the kneading transmission mechanism comprises a kneading shaft, a transmission shaft, a first transmission gear and a second transmission gear, the transmission shaft is perpendicular to an output shaft of the driving motor, and the transmission shaft is perpendicular to the output shaft of the driving motor. The first transmission gear is fixedly arranged on the transmission shaft, the transmission shaft is provided with transmission teeth, and the second transmission gear is arranged on the kneading shaft and meshed with the transmission teeth; the beating transmission mechanism comprises a beating shaft, a small belt pulley, a large belt pulley and a belt, the beating shaft and the kneading shaft are arranged in parallel at an interval, the small belt pulley is fixedly connected with an output shaft of the driving motor, the large belt pulley is arranged on the beating shaft, one end of the belt sleeves the small belt pulley, and the other end of the belt sleeves the large belt pulley. The massage machine core comprises the transmission structure, a machine core shell, two kneading massage mechanisms and two beating massage mechanisms. The massage machine core can conduct kneading massage and beating massage at the same time.

Description

Technical Field

[0001] This utility model relates to the technical field of massagers, and in particular to a shoulder and neck massager core and its transmission structure that can combine kneading and pounding functions. Background Technology

[0002] In modern society, people spend long hours sitting at work in offices, classrooms, or dormitories and homes using computers and mobile phones, day after day, inevitably leading to many suffering from cervical spondylosis and frozen shoulder. Shoulder strap massagers, designed to massage the neck and shoulders, have emerged as a solution. These massagers primarily target the user's neck and shoulder area. During use, a drive mechanism provides mechanical energy to the massage mechanism, enabling it to relieve muscle stiffness and pain in the neck and shoulders through rhythmic rotation, swinging, vibration, and tapping.

[0003] Currently, massagers are commonly categorized by function into kneading massagers and percussion massagers. However, existing kneading and percussion massagers generally only have a single function; kneading massagers only offer kneading massage, and percussion massagers only offer tapping massage, which is insufficient to meet user needs. Although some massagers now combine kneading and percussion functions, their transmission structures are complex and unstable, resulting in large size and high cost. Furthermore, many massagers require the kneading and percussion functions to operate independently, not simultaneously, leading to poor massage effects.

[0004] In view of this, this utility model is developed by deeply conceiving and actively researching and improving the design of existing massage mechanism structures to address the many shortcomings and inconveniences caused by their imperfections. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a shoulder and neck massager core and its transmission structure that has stable transmission and kneading and pounding functions.

[0006] To achieve the above objectives, the solution of this utility model is:

[0007] A transmission structure for a shoulder and neck massager includes a drive motor, a kneading transmission mechanism, and a percussion transmission mechanism. The kneading transmission mechanism includes a kneading shaft, a transmission shaft, a first transmission gear, and a second transmission gear. The transmission shaft is perpendicular to the output shaft of the drive motor. The first transmission gear is fixedly mounted on the transmission shaft and meshes with the output shaft of the drive motor. The transmission shaft has transmission teeth on one side of the first transmission gear. The second transmission gear is mounted on the kneading shaft and meshes with the transmission teeth on the transmission shaft. The percussion transmission mechanism includes a percussion shaft, a small pulley, a large pulley, and a belt. The percussion shaft and the kneading shaft are arranged parallel and spaced apart. The small pulley is fixedly connected to the output shaft of the drive motor. The large pulley is mounted on the percussion shaft. One end of the belt is sleeved on the small pulley, and the other end is sleeved on the large pulley.

[0008] A shoulder and neck massage mechanism includes a housing, a drive motor, a kneading transmission mechanism, a percussion transmission mechanism, two kneading massage mechanisms, and two percussion massage mechanisms. The drive motor is fixedly installed inside the housing, with its output shaft facing one of the kneading massage mechanisms. The kneading and percussion transmission mechanisms are respectively connected to the drive motor. The two kneading massage mechanisms are symmetrically arranged on both sides of the kneading shaft. Each kneading massage mechanism includes a top rod, a swing wheel, and a kneading and percussion arm. The kneading and percussion arm is mounted on one end of the swing wheel, and the top rod is mounted on the other end. The top ends of the kneading and percussion arm and the top rod are staggered. The bottom end of the kneading and percussion arm is provided with a swing ball head. The end of the swing wheel connected to the kneading and percussion arm forms a swing ball head. The inclined plane has a movable limiting seat at the bottom of the top rod. The housing of the mechanism has a limiting groove for the movable limiting seat to move. The movable limiting seat of the top rod is movably set in the limiting groove. The percussion massage mechanism includes a bushing, a one-way spring, two percussion eccentric wheels, two connecting rods, and two swing rods. The bushing is fixedly sleeved on the percussion shaft. One end of the one-way spring is interference-fitted on the bushing, and the other end of the one-way spring is fixed on the large pulley of the percussion transmission mechanism. The two percussion eccentric wheels are respectively sleeved on both ends of the percussion shaft. The outer ends of the two percussion eccentric wheels are connected to one end of the two connecting rods. The other ends of the two connecting rods are rotatably connected to one end of the two swing rods. The other ends of the two swing rods are connected to the eccentric ball head of the percussion arm.

[0009] Furthermore, the mechanism housing includes a main body, an upper cover, and a lower cover. The lower cover is installed in the middle of the main body, and mounting seats are provided on both sides of the lower cover. The mounting seats are provided with guide rails, and the guide rails are provided with limiting grooves for the movable limiting seat of the top rod to move. When the top rod moves, the movable limiting seat can move up and down along the limiting groove of the mounting seat. The upper cover closes on the lower cover.

[0010] Furthermore, the main body forms a left massage area and a right massage area on both sides of the lower cover of the box. The front end of the mounting base is provided with a percussion mounting area for the percussion massage mechanism to be installed. The percussion mounting area is connected to the left massage area and the right massage area. The two kneading massage mechanisms are installed in the left massage area and the right massage area respectively, and the two percussion massage mechanisms are installed in the left massage area and the right massage area respectively.

[0011] Furthermore, the neck and shoulder massager mechanism of this utility model also includes a battery, a circuit board, and a heating element. The battery is installed at the bottom of the mechanism housing, and the mechanism housing also includes a battery cover. The battery is fixed inside the mechanism housing by the battery cover. The circuit board connects the battery and the drive motor, and the heating element is attached to the top cover of the housing.

[0012] Furthermore, the opposing ends of the two eccentric wheels are provided with kneading eccentric shafts, and the opposite ends of the two eccentric wheels are provided with kneading eccentric shafts. A connecting shaft is formed between the kneading eccentric shaft and the kneading eccentric shaft. The upper and lower ends of the connecting shaft are higher than the eccentric shaft and the kneading eccentric shaft, respectively. The push rod is sleeved on the eccentric shaft. One end of the push rod abuts against the connecting shaft, and the other end is limited on the kneading eccentric shaft by the eccentric cover plate. The kneading hammer swing arm is sleeved on the kneading eccentric shaft. One end of the kneading hammer swing arm abuts against the connecting shaft, and the other end is limited on the kneading eccentric shaft by the baffle plate. The kneading eccentric shaft of the eccentric wheel and the end connected to the kneading hammer swing arm both form the eccentric inclined surface.

[0013] With the above structure, the transmission mechanism of the shoulder and neck massager core of this utility model directly mounts the small pulley of the percussion transmission mechanism onto the output shaft of the drive motor. When the power output by the drive motor has a certain impact or vibration, the belt drive of the percussion transmission mechanism can absorb some of the vibration, making the subsequent transmission smoother. The kneading transmission mechanism, through three-stage transmission, can more flexibly achieve a larger transmission ratio adjustment, achieving a much greater speed reduction or torque amplification effect than single-stage gear transmission. A single drive motor can simultaneously drive the kneading and percussion arm and the top rod to swing left and right and up and down, completing the kneading action. Depending on whether the drive motor rotates forward or backward, the percussion action can be selected to be performed simultaneously with the kneading massage. The overall structure is compact, the manufacturing cost is low, and it can improve market competitiveness. The bottom of the top rod of this utility model massager core does not require the installation of a top rod pull plate. Instead, a movable limit seat is directly set at the bottom of the top rod. The movable limit seat is limited by the limit groove on the core housing, making disassembly and assembly simple, convenient, and reliable, eliminating the risk of loose parts and ensuring smooth operation of the massager core.

[0014] When the shoulder and neck massager mechanism of this utility model is running, the drive motor runs, driving the kneading transmission mechanism and the percussion transmission mechanism to rotate. The output shaft of the drive motor drives the first transmission gear of the kneading transmission mechanism. The rotation of the first transmission gear drives the transmission shaft to rotate. The transmission teeth on the transmission shaft drive the second transmission gear to rotate. When the second transmission gear rotates, it drives the kneading shaft to rotate, realizing the transmission of the kneading massage mechanism. At the same time, the rotation of the output shaft drives the small pulley to rotate. The small pulley drives the large pulley to rotate through the belt. When the large pulley rotates around the percussion shaft, the one-way spring selects whether to drive the bushing and the percussion shaft to move together according to the forward or reverse rotation of the drive motor, realizing the transmission of the percussion massage mechanism. The movable limit seat of the top rod, under the limiting action of the limiting groove, allows the free end of the top rod to move up and down within a certain range. The eccentric ball head of the kneading and pounding arm is limited by the eccentric inclined surface of the connected swing rod and eccentric wheel, allowing the kneading and pounding arm to move up, down, left, and right when the kneading shaft rotates, thus working with the top rod to achieve a clamping and kneading massage effect. One end of the one-way spring of the percussion massage mechanism is sleeved on the bushing, and the other end is fixed to the percussion transmission mechanism. When the drive motor drives the percussion transmission mechanism to rotate, causing the inner diameter of the one-way spring to shrink, the one-way spring hugs the bushing, thereby driving the bushing and the percussion shaft to move together. When the percussion eccentric wheels at both ends of the percussion shaft rotate, they drive the connecting rod and the swing rod to perform a back-and-forth striking action, which in turn acts on the eccentric massage head on the kneading and pounding arm, realizing kneading massage while performing percussion massage, thus improving the massage effect. When the drive motor drives the percussion transmission mechanism to rotate in the opposite direction, the inner diameter of the one-way spring increases. The one-way spring rotates freely with the percussion transmission mechanism and cannot drive the bushing to rotate, so it cannot perform percussion massage. At this time, there is only a kneading action and no percussion action. Attached Figure Description

[0015] Figure 1 This is an exploded view of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the combined state of this utility model.

[0017] Figure 3 This is an exploded view of the transmission structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the eccentric wheel of this utility model.

[0019] Label Explanation:

[0020] 1. Mechanism housing; 11. Limiting groove; 12. Main body; 122. Left massage area; 123. Right massage area; 13. Upper cover of the housing; 14. Lower cover of the housing; 141. Mounting base; 142. Guide rail; 143. Hammering mounting area; 15. Battery cover; 2. Drive motor; 21. Output shaft; 3. Kneading transmission mechanism; 31. Kneading shaft; 32. Transmission shaft; 33. First transmission gear; 34. Second transmission gear; 35. Transmission gear; 4. Percussion transmission mechanism; 41. Percussion shaft; 42. Small pulley; 43. Large pulley; 44. Belt; 5. Kneading massage mechanism; 51. Top rod; 511. Movable limit seat; 52. Swing wheel; 521. Swing inclined plane; 522. Eccentric shaft; 523. Swing shaft; 524. Connecting shaft; 53. Kneading and percussion swing arm; 531. Swing ball head; 54. Eccentric cover plate; 55. Baffle; 6. Percussion massage mechanism; 61. Bushing; 62. One-way spring; 63. Percussion eccentric wheel; 64. Connecting rod; 65. Swing rod; 7. Battery; 8. Circuit board. Detailed Implementation

[0021] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] like Figures 1 to 4 As shown, this utility model discloses a shoulder and neck massage mechanism, which includes a mechanism housing 1, a drive motor 2, a kneading transmission mechanism 3, a percussion transmission mechanism 4, two kneading massage mechanisms 5 and two percussion massage mechanisms 6.

[0024] The drive motor 2 is fixedly installed inside the housing 1 of the core. The output shaft 21 of the drive motor 2 faces one of the kneading massage mechanisms 5. The kneading transmission mechanism 3 includes a kneading shaft 31, a transmission shaft 32, a first transmission gear 33 and a second transmission gear 34. The transmission shaft 32 is arranged perpendicularly to the output shaft 21 of the drive motor 2. The first transmission gear 33 is fixedly installed on the transmission shaft 32 and meshes with the output shaft 21 of the drive motor 2. The transmission shaft 32 has a transmission tooth 35 on one side of the first transmission gear 33. The second transmission gear 34 is installed on the kneading shaft 31 and meshes with the transmission tooth 35 on the transmission shaft 32.

[0025] The pounding transmission mechanism 4 includes a pounding shaft 41, a small pulley 42, a large pulley 43, and a belt 44. The pounding shaft 41 and the kneading shaft 31 are arranged parallel to each other and spaced apart. The small pulley 42 is fixedly connected to the output shaft 21 of the drive motor 2. The large pulley 43 is arranged on the pounding shaft 41. One end of the belt 44 is sleeved on the small pulley 42, and the other end is sleeved on the large pulley 43.

[0026] The two kneading massage mechanisms 5 are symmetrically arranged on both sides of the kneading shaft 31. Each kneading massage mechanism 5 includes a top rod 51, a swing wheel 52, and a kneading swing arm 53. The kneading swing arm 53 is installed at one end of the swing wheel 52, and the top rod 51 is installed at the other end of the swing wheel 52. The top ends of the kneading swing arm 53 and the top rod 51 are staggered. The bottom end of the kneading swing arm 53 is provided with a swing ball head 531. The end of the swing wheel 52 connected to the kneading swing arm 53 forms a swing inclined surface 521. The bottom end of the top rod 51 is provided with a movable limiting seat 511. The core housing 1 is provided with a limiting groove 11 for the movable limiting seat 511 to move. The movable limiting seat 511 of the top rod 51 is movably arranged in the limiting groove 11.

[0027] The percussion massage mechanism 6 includes a bushing 61, a one-way spring 62, two percussion eccentric wheels 63, two connecting rods 64, and two swing rods 65. The bushing 61 is fixedly sleeved on the percussion shaft 41. One end of the one-way spring 62 is interference-fitted onto the bushing 61, and the other end of the one-way spring 62 is fixed on the large pulley 43 of the percussion transmission mechanism 4. The two percussion eccentric wheels 63 are respectively sleeved on both ends of the percussion shaft 41. The outer ends of the two percussion eccentric wheels 63 are connected to one end of the two connecting rods 64. The other ends of the two connecting rods 64 are rotatably connected to one end of the two swing rods 65. The other ends of the two swing rods 65 are connected to the eccentric ball head 531 of the percussion arm 53.

[0028] When the shoulder and neck massager mechanism of this utility model is running, the drive motor 2 runs, driving the kneading transmission mechanism 3 and the percussion transmission mechanism 4 to rotate. The output shaft 21 of the drive motor 2 drives the first transmission gear 33 of the kneading transmission mechanism 3. The rotation of the first transmission gear 33 drives the transmission shaft 32 to rotate. The transmission gear 35 on the transmission shaft 32 drives the second transmission gear 34 to rotate. When the second transmission gear 34 rotates, it drives the kneading shaft 31 to rotate, realizing the transmission of the kneading massage mechanism 5. At the same time, the rotation of the output shaft 21 drives the small pulley 42 to rotate. The small pulley 42 drives the large pulley 43 to rotate through the belt. When the large pulley 43 rotates around the percussion shaft 41, the one-way spring 62 selects whether to drive the bushing 61 and the percussion shaft 41 to move together according to the forward or reverse rotation of the drive motor 2, realizing the transmission of the percussion massage mechanism. Under the limiting action of the limiting groove 11, the movable limiting seat 511 of the push rod 51 allows the free end of the push rod 51 to move up and down within a certain range. The deflecting ball head 531 of the kneading swing arm 53 is limited by the swing rod 65 connected to it and the deflecting inclined surface 521 of the deflecting wheel 52, so that the kneading swing arm 53 can move up and down and left and right when the kneading shaft 31 rotates, which, together with the push rod 51, achieves a clamping and kneading massage effect; one end of the one-way spring 62 of the percussion massage mechanism 6 is sleeved on the bushing 61. The upper end is fixed to the percussion transmission mechanism 4. When the drive motor 2 drives the percussion transmission mechanism 4 to rotate, causing the inner diameter of the one-way spring 62 to shrink, the one-way spring 62 hugs the bushing 61, thereby driving the bushing 61 and the percussion shaft 41 to move together. When the percussion eccentric wheels 63 at both ends of the percussion shaft 41 rotate, they drive the connecting rod 64 and the swing rod 65 to perform a back-and-forth striking action, which in turn acts on the kneading and percussion swing arm 53, realizing kneading massage while performing percussion massage, thus improving the massage effect. When the drive motor 2 drives the percussion transmission mechanism 4 to rotate in the opposite direction, the inner diameter of the one-way spring 62 increases, and the one-way spring 62 rotates freely with the percussion transmission mechanism 4, unable to drive the bushing 61 to rotate, that is, unable to perform percussion massage. At this time, there is only a kneading action, without a percussion action.

[0029] The transmission mechanism of this shoulder and neck massager core directly mounts the small pulley 42 of the percussion transmission mechanism 4 onto the output shaft 21 of the drive motor 2. When the power output by the drive motor 2 has a certain impact or vibration, the percussion transmission mechanism 4, using belt drive, can absorb some of the vibration, making subsequent transmission smoother. The kneading transmission mechanism 3, through three-stage transmission, can more flexibly achieve a larger transmission ratio adjustment, achieving a much greater speed reduction or torque amplification effect than single-stage gear transmission. A single drive motor 2 can simultaneously drive the kneading and percussion arm 53 and the top rod 51 to perform left-right and up-down swaying movements to complete the kneading action. Depending on whether the drive motor 2 rotates forward or backward, the percussion action can be selected to be performed simultaneously with the kneading massage. The overall structure is compact, the manufacturing cost is low, and it can improve market competitiveness. The massage mechanism of this utility model does not require the installation of a top rod pull plate at the bottom of the top rod 51. Instead, a movable limit seat 511 is directly set at the bottom of the top rod 51. The movable limit seat 511 is limited by the limit groove 11 on the mechanism housing 1. The disassembly and assembly are simple, convenient and reliable, and there is no risk of parts loosening, which keeps the massage mechanism running smoothly.

[0030] In this embodiment, the mechanism housing 1 includes a main body 12, an upper cover 13, and a lower cover 14. The lower cover 14 is installed in the middle of the main body 12. Mounting seats 141 are provided on both sides of the lower cover 14. Guide rails 142 are provided on the mounting seats 141. The guide rails 142 are provided with limiting grooves 11 for the movable limiting seat 511 of the push rod 51 to move. When the push rod 51 moves, the movable limiting seat 511 can move up and down along the limiting groove 11 of the mounting seat 141. The main body 12 forms a left massage area 122 and a right massage area 123 on both sides of the lower cover 14. The front end of the mounting seat 141 is provided with a percussion mounting area 143 for the percussion massage mechanism 6 to be mounted. The percussion mounting area 43 connects the left massage area 122 and the right massage area 123. The upper cover 13 is closed on the lower cover 14.

[0031] The neck and shoulder massager mechanism of this utility model also includes a battery 7, a circuit board 8 and a heating element. The battery is installed at the bottom of the main body 12 of the mechanism housing 1. The mechanism housing 1 also includes a battery cover 15. The battery 7 is fixed to the mechanism housing 1 through the battery cover 15. The circuit board 8 connects the battery 7 and the drive motor 2. The heating element is attached to the upper cover 13 of the housing. The heating element can heat and massage the neck when the massager mechanism is running.

[0032] In this embodiment, the opposing ends of the two eccentric wheels 52 are provided with kneading eccentric shafts 522, and the opposite ends of the two eccentric wheels 52 are provided with kneading eccentric shafts 523. A connecting shaft 524 is formed between the kneading eccentric shafts 522 and kneading eccentric shafts 523. The upper and lower ends of the connecting shaft 524 are respectively higher than the eccentric shafts 522 and kneading eccentric shafts 523. The top rod 51 is sleeved on the eccentric shaft 522. One end of the top rod 51 abuts against the connecting shaft 524, and the other end is limited on the kneading eccentric shaft 522 by the eccentric cover plate 54. The kneading hammer swing arm 53 is sleeved on the kneading eccentric shaft 523. One end of the kneading hammer swing arm 53 abuts against the connecting shaft 524, and the other end is limited on the kneading eccentric shaft 523 by the baffle 55. The kneading swing shaft 523 of the swing wheel 52 and the end connected to the kneading swing arm 53 both form the swing inclined surface 521.

[0033] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A transmission structure of a shoulder and neck massaging movement, characterized in that, include: The system includes a drive motor, a kneading transmission mechanism, and a pounding transmission mechanism. The kneading transmission mechanism comprises a kneading shaft, a transmission shaft, a first transmission gear, and a second transmission gear. The transmission shaft is perpendicular to the output shaft of the drive motor. The first transmission gear is fixedly mounted on the transmission shaft and meshes with the output shaft of the drive motor. The transmission shaft has transmission teeth on one side of the first transmission gear. The second transmission gear is mounted on the kneading shaft and meshes with the transmission teeth on the transmission shaft. The pounding transmission mechanism comprises a pounding shaft, a small pulley, a large pulley, and a belt. The pounding shaft and the kneading shaft are arranged parallel and spaced apart. The small pulley is fixedly connected to the output shaft of the drive motor. The large pulley is mounted on the pounding shaft. One end of the belt is sleeved on the small pulley, and the other end is sleeved on the large pulley.

2. A shoulder and neck massager mechanism, characterized by, The transmission structure, as described in claim 1, further includes a core housing, two kneading massage mechanisms, and two percussion massage mechanisms. A drive motor is fixedly installed inside the core housing, with its output shaft facing one of the kneading massage mechanisms. The kneading transmission mechanism and the percussion transmission mechanism are respectively connected to the drive motor. The two kneading massage mechanisms are symmetrically arranged on both sides of the kneading shaft. Each kneading massage mechanism includes a top rod, a sway wheel, and a kneading and percussion arm. A kneading and percussion arm is mounted on one end of the sway wheel, and the top rod is mounted on the other end. The top ends of the kneading and percussion arm and the top rod are staggered. The bottom end of the kneading and percussion arm is provided with a sway ball head. The end of the sway wheel connected to the kneading and percussion arm forms a sway slope. The top rod... The bottom end is provided with a movable limiting seat, and the core housing is provided with a limiting groove for the movable limiting seat to move. The movable limiting seat of the top rod is movably set in the limiting groove. The percussion massage mechanism includes a bushing, a one-way spring, two percussion eccentric wheels, two connecting rods and two swing rods. The bushing is fixedly sleeved on the percussion shaft. One end of the one-way spring is interference-fitted on the bushing, and the other end of the one-way spring is fixed on the large pulley of the percussion transmission mechanism. The two percussion eccentric wheels are respectively sleeved on both ends of the percussion shaft. The outer ends of the two percussion eccentric wheels are connected to one end of the two connecting rods. The other ends of the two connecting rods are rotatably connected to one end of the two swing rods. The other ends of the two swing rods are connected to the eccentric ball head of the percussion arm.

3. The shoulder and neck massager core according to claim 2, wherein: The mechanism housing includes a main body, an upper cover, and a lower cover. The lower cover is installed in the middle of the main body. Mounting seats are provided on both sides of the lower cover. Guide rails are provided on the mounting seats. The guide rails are provided with limiting grooves for the movable limiting seat of the top rod to move. When the top rod moves, the movable limiting seat can move up and down along the limiting groove of the mounting seat. The upper cover closes on the lower cover.

4. The shoulder and neck massager core according to claim 3, wherein: The main body forms a left massage area and a right massage area on both sides of the lower cover of the box. The front end of the mounting base is provided with a percussion mounting area for the percussion massage mechanism to be installed. The percussion mounting area is connected to the left massage area and the right massage area. The two kneading massage mechanisms are installed in the left massage area and the right massage area respectively. The two percussion massage mechanisms are installed in the left massage area and the right massage area respectively.

5. The shoulder and neck massager core according to claim 3, wherein: It also includes a battery, a circuit board, and a heating element. The battery is installed at the bottom of the housing, which also includes a battery cover. The battery is fixed inside the housing by the battery cover. The circuit board connects the battery and the drive motor, and the heating element is attached to the top cover of the housing.

6. The shoulder and neck massager core according to claim 2, wherein: The opposing ends of the two eccentric wheels are provided with kneading eccentric shafts, and the opposite ends of the two eccentric wheels are provided with kneading eccentric shafts. A connecting shaft is formed between the kneading eccentric shaft and the kneading eccentric shaft. The upper and lower ends of the connecting shaft are higher than the eccentric shaft and the kneading eccentric shaft, respectively. The push rod is sleeved on the eccentric shaft. One end of the push rod abuts against the connecting shaft, and the other end is limited on the kneading eccentric shaft by the eccentric cover plate. The kneading hammer swing arm is sleeved on the kneading eccentric shaft. One end of the kneading hammer swing arm abuts against the connecting shaft, and the other end is limited on the kneading eccentric shaft by the baffle plate. The kneading eccentric shaft of the eccentric wheel and the end connected to the kneading hammer swing arm both form the eccentric inclined surface.

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