Multifunctional massage machine core

Abstract

This invention provides a multi-functional massage machine core, including a drive motor located within the housing. [Solution] The drive motor 130 is transmitted to the transmission assembly 200, and the transmission assembly is transmitted unidirectionally to the first transmission shaft 301 to rotate the first transmission shaft in one direction. The transmission assembly includes a connecting seat 210, within which a first bearing 230 and a unidirectional bearing 220 are provided coaxially. A portion of the connecting seat located outside the first bearing is configured such that the first bearing receives a radial load, and is transmitted to the drive motor. By providing the unidirectional bearing separately from the first bearing that receives the radial load, the load burden on the unidirectional bearing is reduced, and at the same time the layout of the transmission shaft is optimized to increase the battery housing space, which has the advantages of extending the service life of the unidirectional bearing, reducing maintenance costs, and improving portability by optimizing the spatial layout inside the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of massage cores, and particularly to multifunctional massage cores.

Background Art

[0002] The one-way bearings used in massage cores are usually used for switching massage modes to achieve different massage effects. In the design of conventional one-way bearings, they are usually configured to receive radial loads. However, the one-way bearings used in massage cores are small in size, and high-quality one-way bearings with high costs are not adopted for cost control. One-way bearings with relatively low costs are likely to be damaged or malfunction when receiving radial loads over a long period, which not only affects the service life of the massage core but also increases the maintenance cost. In addition, the cost of one-way bearings is much higher than that of general ball bearings. As a core component, how to extend its service life and reduce the overall cost when using a low-cost one-way bearing is an urgent issue to be solved.

[0003] On the other hand, the internal space of the massage core is limited. Although the built-in battery endows the massager with the function of portable use, the built-in battery raises higher requirements for the utilization of the internal space of the core. In the prior art, the layout of the drive motor and the transmission shaft often does not fully consider space optimization, resulting in insufficient accommodation space for the battery and affecting the installation and operation of other assemblies. Furthermore, the effect of the coordinated operation of the multifunctional massage assembly and the kneading assembly is also restricted by the transmission structure design, making it difficult to achieve high-efficiency and stable massage operations.

Summary of the Invention

Problems to be Solved by the Invention

[0004] To solve the above-mentioned problems of the conventional technology, this invention provides a multi-functional massage machine core that has the advantages of extending the service life of the unidirectional bearing, reducing maintenance costs, and improving portability by optimizing the spatial layout inside the core. [Means for solving the problem]

[0005] To achieve the above objectives, the main technical solutions employed by this invention include the following:

[0006] The core of a multi-functional massage machine is as follows: It includes a drive motor located within a housing, the drive motor is drive-connected to a transmission assembly, the transmission assembly is unidirectionally drive to a first transmission shaft to rotate the first transmission shaft in one direction. The transmission assembly includes a connecting seat, within which a first bearing and a unidirectional bearing are coaxially provided, and a portion of the connecting seat located outside the first bearing is drive-connected to the drive motor such that the first bearing is configured to receive a radial load. Multiple multi-functional massage assemblies are provided on the first transmission shaft, the drive motor is drive-connected to a second transmission shaft, and multiple pinching and kneading assemblies are provided on the second transmission shaft. An eccentric wheel is anti-rotation connected to the second transmission shaft, a rocking link is fitted onto the eccentric wheel, and one end of the rocking link away from the eccentric wheel is movably connected to a multi-functional massage assembly.

[0007] In one embodiment of the present invention, a first mounting groove and a second mounting groove are provided within the connecting seat, which engage with a first bearing and a unidirectional bearing, respectively. A second pulley is formed in a part of the connecting seat located outside the first mounting groove, and the second pulley is connected to the first pulley provided on the output shaft of the drive motor via a transmission belt.

[0008] In one embodiment of the present invention, the first mounting groove is interlocked with the outer ring of the first bearing, and the second mounting groove is clearance-fitted with the outer ring of the unidirectional bearing. Multiple locking projections are provided in the second mounting groove, and multiple locking grooves that engage with the locking projections are provided in the outer ring of the unidirectional bearing.

[0009] In one embodiment of the present invention, the output shaft of the drive motor includes a first worm, a first worm wheel is meshed with the first worm, the first worm wheel is connected to a second worm via a third transmission shaft, and the second transmission shaft is provided with a second worm wheel that meshes with the second worm.

[0010] In one embodiment of the present invention, the first transmission shaft and the output shaft of the drive motor are positioned at different heights, and the positioning height of the first transmission shaft is set higher so that a larger space is secured below the output shaft of the drive motor for housing the battery.

[0011] In one embodiment of the present invention, a multifunctional massage assembly includes a first massage arm fitted onto an eccentric shaft, the eccentric shaft being provided on a first transmission shaft, and the axis of the eccentric shaft being parallel to and non-overlapping with the axis of the first transmission shaft. The first massage arm is provided with a pivoting coupling, which is rotatably connected to a swing link.

[0012] In one embodiment of the present invention, a first massage arm is rotatably connected to an eccentric shaft via a first connecting hole, and the first massage arm includes a massage portion and a rotatable connecting portion, each provided on both sides of the first connecting hole. The rotatable connecting portion is rotatably connected to a swing link via a pivot shaft, and a second bearing is provided in the first connecting hole, with the inner ring of the second bearing fitted onto the eccentric shaft. The eccentric shafts are provided at both ends of the first transmission shaft, and a locking plate for locking the second bearing is fitted onto the eccentric shaft, and the locking plate is fixed to the first massage arm.

[0013] In one embodiment of the present invention, a third bearing is provided on the first transmission shaft, a locking seat is provided above the third bearing, and the locking seat is fixed to the housing so as to lock the third bearing.

[0014] In one embodiment of the present invention, the clamping and kneading assembly includes a swing wheel that is anti-rotating and connected to a second transmission shaft, the swing wheel including an eccentric and inclined connecting column connected to the second transmission shaft. A second massage arm is fitted onto the connecting column, a guide block is provided on the second massage arm, and a guide groove that engages with the guide block is provided on the housing. The first transmission shaft and the second transmission shaft are arranged parallel to each other.

[0015] In one embodiment of the present invention, the swaying wheel includes a stopper ring and a connecting column, which are provided at an angle to each other. A swaying wheel retaining cover is fixed to one end of the connecting column away from the stopper ring to prevent the second massage arm from falling off the connecting column. The second massage arm is rotatably connected to the connecting column via a second connecting hole, and a rotating massage head is provided on one side of the second massage arm away from the guide block. [Effects of the Invention]

[0016] The beneficial effects of this invention are as follows: A first bearing and a unidirectional bearing are provided coaxially within the connecting seat, and a portion of the connecting seat located outside the first bearing is connected to the drive motor via a transmission, such that the first bearing receives a radial load. The unidirectional bearing is provided separately from the first bearing that receives the radial load, reducing the load on the unidirectional bearing, optimizing the layout of the transmission shaft to expand the battery housing space, extending the service life of the unidirectional bearing, reducing maintenance costs, and improving portability by optimizing the spatial layout inside the core. [Brief explanation of the drawing]

[0017] To more clearly explain the technical concept of the embodiments of this invention, the drawings necessary for use in the embodiments are briefly introduced below. It should be noted that the following drawings only show some embodiments of this invention and should therefore not be considered to limit the scope of this invention. It should be understood that, for an ordinary technician in the art, it is possible to obtain other relevant drawings based on these drawings without requiring any creative work.

[0018] [Figure 1] This is a structural perspective view of the present invention. [Figure 2] This is one of the structural exploded views of the present invention. [Figure 3] This is an enlarged schematic diagram of section A in Figure 2. [Figure 4] This is a perspective view of the connecting seat of the present invention. [Figure 5] This is the second structural exploded view of the present invention.

[0019] 500, battery. [Modes for carrying out the invention]

[0020] To clarify the purpose, technical solution, and advantages of the embodiments of the present invention, the technical solution of the embodiments of the present invention will be described clearly and completely below with reference to the drawings of the embodiments. Naturally, the embodiments described are only some, not all, embodiments of the present invention. All other embodiments that a person of ordinary skill in the art could obtain without creative work based on the embodiments of the present invention are all within the scope of protection of the present invention. Accordingly, the detailed description of the embodiments of the present invention provided below in the accompanying drawings is not intended to limit the scope of the present invention for which protection is claimed, but merely to show selected embodiments of the present invention. All other embodiments that a person of ordinary skill in the art could obtain without creative work based on the embodiments of the present invention are all within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by "up", "down", "inside", "outside", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplification of the description of the present invention, and does not indicate or imply that the shown device or element must have a specific orientation and must be configured and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. Also, terms such as "first" and "second" are used only for the purpose of description and should not be construed as indicating or suggesting relative importance.

[0022] In the description of the present invention, it should be noted that unless there are separate clear regulations and limitations, terms such as "attachment", "installation", "connection", etc. should be understood in a broad sense. For example, "connection" may be a fixed connection, a removable connection, or an integral connection. It may be a mechanical connection or an electrical connection. It may be a direct connection or an indirect connection through an intermediate medium, or a communication inside two elements. A person skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.

[0023] Embodiment In the prior art, a one-way bearing 220 is generally adopted in the massage core to realize the switching of the massage mode. However, it is limited by the internal space, the size of the one-way bearing 220 is small, and a generally quality one-way bearing 220 is likely to cause early damage when receiving a radial load for a long time. A high-quality one-way bearing 220 can withstand larger radial and axial loads and can be applied to a high-load and high-speed working environment, but the cost is excessive. Although the introduction of the built-in battery 500 enhances the portability of the product, it increases the complexity of the internal space layout of the core, and it is difficult to balance the stability of the transmission system and the accommodation needs of the battery 500 in the conventional structure.

[0024] To address the above issues, the researchers found that the main cause of failure in the unidirectional bearing 220 was the sustained action of radial load, and that the conventional design did not effectively decompose the load transmission path. Through analysis of the load-bearing characteristics of the transmission system, they proposed combining the unidirectional bearing 220 and a conventional bearing coaxially, with the conventional bearing bearing the main radial load. At the same time, to address the space constraint problem, a hierarchical shaft system layout was adopted, and the power output shaft and functional transmission shaft were arranged on a skip floor to secure lower space for the battery 500 module. It should be noted that the first bearing 230 is a standard ball bearing, which is widely used in this field, has a relatively low cost and a simpler structure, offers good stability when used in the massager field, and does not experience the same problems as the unidirectional bearing 220 even when subjected to long-term radial loads.

[0025] Accordingly, as shown in Figures 1-5, this application proposes a technical solution that includes a drive motor 130 within a housing 100. The drive motor 130 connects to a transmission assembly 200, which forms a unidirectional transmission with a first transmission shaft 301. The transmission assembly 200 includes a connecting seat 210 with a first bearing 230 and a unidirectional bearing 220 coaxially mounted, and the outside of the first bearing 230 is connected to the drive motor 130 to receive radial loads. A multifunctional massage assembly 300 is mounted on the first transmission shaft 301, and the drive motor 130 simultaneously drives a second transmission shaft 401, on which a clamping and kneading assembly 400 is mounted and interlocks with the massage assembly via an eccentric wheel 430 and a swing link 440.

[0026] Here, the housing 100 may include an upper housing 110 and a lower housing 120. The lower housing 120 serves as the core support and connecting structure. In one embodiment, the upper housing 110 is further provided with a lamp cover 111, and a light-emitting element is provided inside the lamp cover 111. The light emitted by the light-emitting element generates heat, providing a heating function during massage.

[0027] Here, the connection seat 210 refers to a rigid structural member that supports the bearing assembly, and specifically, integral injection molding can be employed, and a coaxial bearing mounting position is provided inside it to achieve precise control of the load transmission path. The first bearing 230 refers to a standard ball bearing, which is fixed inside the connection seat 210 by interference fit and forms the main support structure for radial loads. The unidirectional bearing 220 refers to a unidirectional rotating clutch bearing, and specifically, a wedge block structure can be employed, transmitting torque only when the first transmission shaft 301 rotates in one direction. The connection between the drive motor 130 and the transmission assembly 200 refers to the power input interface, and specifically, a pulley transmission system can be employed, connecting the motor output shaft and the transmission structure outside the connection seat 210 by a synchronous belt. The hierarchical shaft system layout refers to the spatial positional relationship between the first transmission shaft 301 and the drive motor 130 output shaft, and specifically, a vertical offset arrangement can be employed, forming a regular spatial area below the motor.

[0028] Specifically, the drive motor 130 drives the transmission structure outside the connection seat 210 via a synchronous belt, causing the first bearing 230 to directly bear the radial tensile force generated by the transmission belt 240. When the motor rotates forward, the unidirectional bearing 220 forms a rigid connection with the first transmission shaft 301, driving the massage assembly to perform unidirectional motion. The second transmission shaft 401 is connected to the motor via a gear pair, driving the eccentric wheel 430 to generate reciprocating motion in the oscillating link 440, which is converted into the compound motion of the multi-functional massage assembly 300 via a movable connection point. Because the first bearing 230 bears the radial load of the transmission system, the unidirectional bearing 220 only needs to transmit torque when rotating forward, significantly reducing its load. The hierarchical design of the shaft system creates a complete rectangular space below the motor, which can accommodate the mounting dimensions of a standard lithium battery 500 pack.

[0029] Compared to conventional technology, while conventional designs required the unidirectional bearing 220 to simultaneously bear the dual effects of torque transmission and radial load, this design achieves physical separation of load paths through the coaxial combination of bearing assemblies. While conventional massage mechanisms primarily employ a single drive shaft, this design achieves coordinated control of kneading and tapping actions through dual-axis interlocking. This technological solution effectively extends the service life of the unidirectional bearing 220 and reduces its load to a purely torque-transmission state. The optimized spatial layout provides a standardized mounting position for the built-in battery 500, solving the bottleneck of operating time in portable massage devices. The dual-axis drive structure enables the coordinated operation of multiple massage modes, significantly improving the richness of massage functions within a limited space.

[0030] In one embodiment of the present invention, the connecting seat 210 is provided with a first bearing 230, a first mounting groove 212 that engages with a unidirectional bearing 220, and a second mounting groove 213. A second pulley 211 is formed in a part of the connecting seat 210 located outside the first mounting groove 212, and the second pulley 211 is connected to the first pulley 131 provided on the output shaft of the drive motor 130 via a transmission belt 240.

[0031] Here, the first mounting groove 212 refers to an annular groove structure for fixing the first bearing 230, which can be realized by employing a stepped groove structure, and its inner wall forms an interference fit with the outer ring of the first bearing 230 to transmit radial loads. The stepped groove can further restrict the axial position of the first bearing 230 on one side. The second mounting groove 213 refers to a mounting position for accommodating the unidirectional bearing 220, which can be realized by employing a groove with a position restriction structure, and its inner wall forms a clearance fit with the outer ring of the unidirectional bearing 220 to eliminate / reduce the transmission of radial loads. The second pulley 211 refers to a transmission component integrated on the outside of the connecting seat 210, which forms an offset transmission layout with the output shaft of the drive motor 130 via the transmission belt 240.

[0032] Specifically, the first bearing 230 is confined within the first mounting groove 212 and bears the radial load from the drive motor 130, while the unidirectional bearing 220 primarily performs unidirectional transmission within the second mounting groove 213. The two bearings achieve load separation through a separate mounting structure. The second pulley 211 is designed to be integrated with the connecting seat 210 and transmits power from the drive motor 130 to the connecting seat 210 via the transmission belt 240. This transmission path avoids the radial load bearing area of ​​the unidirectional bearing 220. The spatial offset layout formed by the pulley transmission system creates a height difference between the output shaft of the drive motor 130 and the first transmission shaft 301, securing vertical space in the lower battery 500 housing area.

[0033] Compared to conventional technology, conventional massage machine cores typically have a limited service life because the unidirectional bearing 220 is directly attached to the transmission shaft and subjected to radial loads. This invention independently installs a first mounting groove 212 that receives radial loads, allowing the unidirectional bearing 220 to primarily bear the axial transmission function. At the same time, the internal space layout is optimized by externalizing the pulley transmission system design. Through the above technological solution, this invention effectively extends the service life of the unidirectional bearing 220 and avoids premature failure caused by long-term radial loads. Simultaneously, the offset transmission structure optimizes the space utilization rate inside the machine core, providing sufficient space for the built-in battery 500 and enabling stable operation of the compact machine core structure.

[0034] In one embodiment of the present invention, the first mounting groove 212 is interlocked with the outer ring of the first bearing 230, and the second mounting groove 213 is clearance-fitted with the outer ring of the unidirectional bearing 220. Multiple locking projections 214 are provided in the second mounting groove 213, and multiple locking grooves 221 that engage with the locking projections 214 are provided in the outer ring of the unidirectional bearing 220.

[0035] Here, interference fit refers to a configuration where the inner diameter of the first mounting groove 212 is smaller than the outer diameter of the outer ring of the first bearing 230, and the two are tightly connected by a press-fit method. Specifically, this can be achieved by a hot-fitting method or a mechanical press-fitting method, and its effect is to ensure that the first bearing 230 is fixed within the connecting seat 210 and directly receives the radial load transmitted from the drive motor 130. Clearance fit refers to a configuration where the inner diameter of the second mounting groove 213 is slightly larger than the outer diameter of the outer ring of the unidirectional bearing 220, and specifically this can be achieved by tolerance compound design, and its effect is to allow a small displacement space for the unidirectional bearing 220 during installation, thereby reducing the influence of assembly stress on the bearing. The locking projection 214 refers to a projection structure provided on the inner wall of the second mounting groove 213, and the locking groove 221 refers to a groove structure provided on the outer ring of the unidirectional bearing 220. Its function is to prevent circumferential rotation of the unidirectional bearing 220 during the transmission process by a mechanical locking method.

[0036] Specifically, the first bearing 230 is fixed in the first mounting groove 212 of the connecting seat 210 by interference fit, and the radial load transmitted from the drive motor 130 preferentially acts on the first bearing 230. On the other hand, the unidirectional bearing 220 is mounted in the second mounting groove 213 by clearance fit, avoiding / reducing the transmission of radial load to the unidirectional bearing 220 when the connecting seat 210 is subjected to force deformation. When the drive motor 130 drives and rotates the connecting seat 210, the fitting structure of the locking projection 214 and the locking groove 221 prevents relative rotation between the outer ring of the unidirectional bearing 220 and the connecting seat 210, thereby ensuring the reliability of the unidirectional transmission function. Since the first bearing 230 bears the main radial load, the unidirectional bearing 220 mainly needs to receive axial loads, and its load is significantly reduced, thereby extending its service life.

[0037] As can be understood, the first bearing 230 and the unidirectional bearing 220 are coaxially mounted within the connecting seat 210, the connecting seat 210 is drive-connected to the drive motor 130, and since the connecting seat 210 is a priority load-bearing component, under normal circumstances, when the connecting seat 210 is subjected to a radial load, it is transmitted relatively evenly to the first bearing 230 and the unidirectional bearing 220.

[0038] In contrast, this application configures the first bearing 230 as a core radial load support structure, thereby significantly reducing the radial load on the unidirectional bearing 220. Specifically, the force transmission position on the connecting seat 210 is located outside the first bearing 230, which causes the radial load to act more concentratedly on the first bearing 230, reducing its impact on the unidirectional bearing 220.

[0039] Furthermore, the connecting seat 210 undergoes minute deformation or displacement when subjected to force, and the interference fit between the first bearing 230 and the first mounting groove 212 causes the force received by the connecting seat 210 to act directly on the first bearing 230. On the other hand, the clearance fit between the unidirectional bearing 220 and the second mounting groove 213 allows the gap to absorb some or all of the minute deformation or displacement that occurs in the connecting seat 210 when subjected to force, ultimately further reducing the radial load received by the unidirectional bearing 220.

[0040] As can be understood, due to the clearance fitting between the second mounting groove 213 and the unidirectional bearing 220, in some situations, after the connecting seat 210 has received the load, the second mounting groove 213 may only contact the outer ring of the unidirectional bearing 220, and no load may be applied to the unidirectional bearing 220.

[0041] It should be noted that in this application, the first bearing 230 is configured as a core radial load support structure, i.e., an offset load receiving structure. Therefore, even if the second mounting groove 213 and the unidirectional bearing 220 are fitted together in an interference fit, the radial load received by the unidirectional bearing 220 can be similarly reduced significantly. The clearance fit between the second mounting groove 213 and the unidirectional bearing 220 is not an essential feature for reducing the radial load received by the unidirectional bearing 220, but rather a further improvement.

[0042] The locking projection 214 installed in the second mounting groove 213 and the locking groove 221 of the outer ring of the unidirectional bearing 220 engage with each other, preventing circumferential rotation of the unidirectional bearing 220 during the transmission process. This achieves a rotation-preventing connection between the second mounting groove 213 and the outer ring of the unidirectional bearing 220. At the same time, by replacing the conventional interference fit with a mechanical locking method, transmission reliability is ensured, increased bearing wear caused by interference fits is avoided, and the transmission of radial load to the unidirectional bearing 220 is reduced.

[0043] In one embodiment of the present invention, the output shaft of the drive motor 130 includes a first worm 132, a first worm wheel 133 is meshed with the first worm 132, the first worm wheel 133 is connected to a second worm 135 via a third transmission shaft 134, and a second worm wheel 450 that meshes with the second worm 135 is provided on the second transmission shaft 401.

[0044] Here, the first worm 132 refers to a helical gear structure coaxially connected to the output shaft of the drive motor 130, and its lead angle is configured to satisfy the requirements of transmission efficiency and self-locking. The first worm wheel 133 refers to a helical gear that meshes with the first worm 132, and its tooth profile parameters form a mesh that matches that of the first worm 132. The third transmission shaft 134 refers to a rigid shaft connecting the first worm wheel 133 and the second worm 135, and can be realized by employing a stepped shaft structure, with both ends fixedly connected to the first worm wheel 133 and the second worm 135 via keyways, respectively. The second worm 135 refers to a secondary worm that meshes with the second worm wheel 450, and can be realized by employing a structure with the same or a different module as the first worm 132. The second worm wheel 450 refers to the driven gear fixed to the second transmission shaft 401, and the number of teeth on the worm wheel and the number of threads on the second worm 135 form the reduction ratio.

[0045] Specifically, the rotational power of the drive motor 130 is transmitted to the first worm wheel 133 via the first worm 132, achieving a conversion of the power transmission direction from a horizontal axis to a vertical axis. The first worm wheel 133 rotates the third transmission shaft 134, forming a two-stage reduction transmission to the second worm 135 and the second worm wheel 450. The vertical axis transmission structure creates a vertically offset layout between the output shaft of the drive motor 130 and the first transmission shaft 301, freeing up space below for housing the battery 500. The two-stage reduction transmission distributes the load across two pairs of worm gears, reducing the load-bearing strength of a single transmission pair. At the same time, the self-locking characteristics of the worm transmission are utilized to prevent reverse impact loads from acting on the unidirectional bearing 220.

[0046] In one embodiment of the present invention, the first transmission shaft 301 is positioned at a different height from the output shaft of the drive motor 130, and the positioning height of the first transmission shaft 301 is made higher to secure a larger space below the output shaft of the drive motor 130 to accommodate the battery 500.

[0047] Here, different heights refer to the two transmission shafts forming a non-coplanar spatial arrangement in the vertical direction, which can be achieved by employing a stepped mounting structure and creating a vertical height difference by adjusting the mounting position of the transmission shaft support seat. A higher arrangement height refers to the first transmission shaft 301 having a larger Z-axis coordinate value in the vertical coordinate system relative to the output shaft of the drive motor 130. In Figure 5, the vertical direction corresponds to the Z-axis of the vertical coordinate system, with bottom to top being the positive direction. Specifically, this can be achieved by installing a lift bracket inside the housing 100, which raises the mounting surface of the first transmission shaft 301 to form a higher mounting platform.

[0048] Specifically, the output shaft of the drive motor 130 and the first transmission shaft 301 are mounted on support surfaces at different heights within the housing 100, respectively, forming a vertically offset spatial layout. The first transmission shaft 301 is fixed above the plane where the output shaft of the drive motor 130 is located by a lift bracket, creating a three-dimensional space directly below the output shaft of the drive motor 130 that is not occupied by mechanical parts. This three-dimensional space directly constitutes the housing cavity for the battery 500 module by eliminating the horizontal extension structure of the parallel transmission shafts in the conventional layout. This vertical spatial reconstruction frees up bottom space resources by utilizing the height difference between the transmission shafts without changing the overall dimensions of the housing 100.

[0049] As shown in Figure 5, Figure 5 also corresponds to a side view of the massage machine core. In Figure 5, the first pulley 131 and the second pulley 211 are hidden and therefore shown with dashed lines. Normally, the diameter of the second pulley 211 is larger than the diameter of the first pulley 131. When the positional height of the first transmission shaft 301 is higher, that is, when the vertical height of the first transmission shaft 301 in Figure 5 is higher, the lower bottoms of the first pulley 131 and the second pulley 211 are located on almost the same horizontal plane. This can also be understood as the lower half of the transmission belt 240 in Figure 5 being almost horizontal. In this structure, the space below the lower half of the transmission belt 240 becomes larger and available for housing the battery 500, improving space utilization.

[0050] In one embodiment of the present invention, the multifunctional massage assembly 300 includes a first massage arm 320 fitted onto an eccentric shaft 310, the eccentric shaft 310 being provided on a first transmission shaft 301, and the axis of the eccentric shaft 310 being parallel to and non-overlapping with the axis of the first transmission shaft 301. The first massage arm 320 is provided with a pivoting coupling portion 321, which is rotatably connected to a swing link 440.

[0051] Here, the eccentric shaft 310 refers to a transmission component whose axis is parallel to and non-overlapping with the axis of the first transmission shaft 301. Specifically, it can be realized by welding or integral molding a cylindrical metal shaft / plastic shaft to the first transmission shaft 301. The eccentric structure causes an eccentric trajectory in the first massage arm 320, thereby forming a tapping massage motion. Here, the rotating connection part 321 refers to the part that is movably connected to the oscillating link 440 on the first massage arm 320. Specifically, it can be realized by employing a combined structure of a rotating shaft 441 and a bearing. By transmitting the reciprocating oscillation of the oscillating link 440 to the first massage arm 320, a kneading massage motion is realized.

[0052] Specifically, when the first transmission shaft 301 is driven and rotates, the eccentric shaft 310 causes the first massage arm 320 to revolve around the axis of the first transmission shaft 301, forming a tapping massage trajectory. Simultaneously, the oscillating link 440 generates reciprocating oscillations through the drive of the eccentric wheel 430, causing the first massage arm 320 to rotate around the axis of the eccentric shaft 310 via the rotating coupling section 321, realizing a kneading massage action. When the two motions are superimposed, tapping and kneading actions are performed simultaneously. When the rotation of the first transmission shaft 301 stops, only the oscillating link 440 drives the first massage arm 320 to realize a single kneading mode, at which point the eccentric shaft 310 remains stationary, avoiding unnecessary frictional losses.

[0053] On the other hand, the unidirectional bearing 220 can selectively control whether or not the first transmission shaft 301 rotates, thereby controlling whether or not the tapping function is used. As can be understood, the unidirectional bearing 220 provides an anti-rotation connection with the first transmission shaft 301 only when rotating in one direction, thereby transmitting torque to the first transmission shaft 301 for synchronous rotation. When rotating in the other direction, the unidirectional bearing 220 is equivalent to free-spinning around the first transmission shaft 301, and the first transmission shaft 301 does not rotate. The multi-functional massage assembly 300, on the one hand, performs a reciprocating oscillating motion around the eccentric shaft 310 under the action of the oscillating link 440, which is equivalent to achieving a kneading massage effect. At this time, the first transmission shaft 301 does not rotate, that is, the transmission assembly 200 does not drive the first transmission shaft 301. When the transmission assembly 200 drives the rotation of the first transmission shaft 301, the rotation of the first transmission shaft 301 rotates the eccentric shaft 310, and the eccentric rotation of the eccentric shaft 310 produces a tapping effect on the first massage arm 320. The superposition of these two movements realizes an operating mode in which kneading and tapping coexist. The first massage arm 320 is separated from the massage unit 323 and the rotational connecting unit 321, separating the point of force application and the transmission fulcrum of the massage motion, thereby enabling a larger range of motion for the massage unit 323.

[0054] In one embodiment of the present invention, a first massage arm 320 is rotatably connected to an eccentric shaft 310 via a first connecting hole 322. The first massage arm 320 includes massage sections 323 and rotatable connecting sections 321, which are provided on both sides of the first connecting hole 322, and the rotatable connecting sections 321 are rotatably connected to a swing link 440 via a pivot shaft 441. A second bearing 330 is provided in the first connecting hole 322, and the inner ring of the second bearing 330 is fitted onto the eccentric shaft 310. The eccentric shaft 310 is provided at both ends of the first transmission shaft 301, and a locking plate 311 that locks the second bearing 330 is fitted onto the eccentric shaft 310, and the locking plate 311 is fixed to the first massage arm 320.

[0055] Here, the first connecting hole 322 refers to a hole structure provided in the first massage arm 320 that accommodates the eccentric shaft 310 and the second bearing 330. Specifically, it can be realized by employing a stepped hole structure, and its inner wall is interlocked with the outer ring of the second bearing 330 to achieve stable support. The second bearing 330 refers to a rolling bearing that reduces friction between the eccentric shaft 310 and the first massage arm 320. Specifically, it can be realized by employing a deep groove ball bearing, and its inner ring is fixedly connected to the eccentric shaft 310 to transmit rotational motion. The locking plate 311 refers to an annular component that limits the axial displacement of the second bearing 330, and is fixedly connected to the first massage arm 320 by a screw to prevent the bearing from falling out.

[0056] Specifically, the inner ring of the second bearing 330 is fixedly connected to the eccentric shaft 310, causing the inner ring of the second bearing 330 to rotate synchronously with the rotation of the eccentric shaft 310, while the outer ring remains relatively stationary with respect to the first connecting hole 322, thereby reducing friction loss. The locking plate 311 covers the end face of the second bearing 330 by a fixed connection method, preventing axial rattle during high-speed rotation of the bearing. The massage section 323 and the pivoting connection section 321 are distributed on both sides of the first connecting hole 322, increasing the coverage area of ​​the massage section 323. The pivoting connection method between the pivot shaft 441 and the oscillating link 440 allows the oscillating link 440 to adaptively adjust its angle when the rotational trajectory of the eccentric shaft 310 changes, thus avoiding motion interference.

[0057] In one embodiment of the present invention, a third bearing 312 is installed on a first transmission shaft 301, a locking seat 313 is installed above the third bearing 312, and the locking seat 313 is fixedly connected to the housing 100 so as to lock the third bearing 312.

[0058] Here, the third bearing 312 refers to a rolling support component installed between the transmission shaft and the housing 100. Specifically, it can be implemented using a deep groove ball bearing or a cylindrical roller bearing, the outer ring of which is in contact with the housing 100 and pressed against the locking seat 313, and the inner ring of which is interlocked with the first transmission shaft 301. It is used to receive the radial load generated during the operation of the transmission shaft. Here, the locking seat 313 refers to an annular positioning structure fixed to the housing 100. Specifically, it can be implemented using a metal retaining plate or an injection-molded projection. Its lower surface is in contact with the outer ring of the third bearing 312, and it is fixedly connected to the housing 100 by bolts or a snap fit. It is used to restrict the axial movement of the third bearing 312.

[0059] Specifically, the third bearing 312 is assembled at the end of the first transmission shaft 301, preferably close to the eccentric shaft 310, and its outer ring forms a rigid connection with the housing 100 via a locking seat 313. When a radial load is generated by the rotation of the transmission shaft, the third bearing 312 directly bears the load and distributes it to the entire structure via the housing 100, so the unidirectional bearing 220 only receives the load on the remaining portion. The locking seat 313 ensures the stability of the axial position of the third bearing 312 by its fixed connection method, avoiding axial offset due to bearing displacement during transmission shaft operation, and thereby maintaining the coaxiality of the transmission system.

[0060] In one embodiment of the present invention, the clamping and kneading assembly 400 includes a swing wheel 410 connected to a second transmission shaft 401 to prevent rotation. The swing wheel 410 includes an eccentric and inclined connecting column 412 connected to the second transmission shaft 401. A second massage arm 420 is fitted onto the connecting column 412, and a guide block 422 is provided on the second massage arm 420. The housing 100 is provided with a guide groove 121 that engages with the guide block 422. The first transmission shaft 301 and the second transmission shaft 401 are arranged in parallel.

[0061] Here, the anti-rotation connection of the swaying wheel 410 to the second transmission shaft 401 refers to achieving synchronous rotation between the two using a non-circular cross-sectional structure. For example, a fitting structure of a flat shaft and a keyway is adopted to avoid relative rotation during the power transmission process. The eccentric and inclined installation of the connecting column 412 refers to its axis forming an angle with the axis of the second transmission shaft 401 and being offset from the center position. For example, the angle range can be 5° to 30°, and the eccentricity distance can be 2 to 5 millimeters, thereby generating a compound motion trajectory. The engagement of the guide block 422 and the guide groove 121 refers to the installation of a sliding pair using a projection structure and a groove structure. For example, the guide block 422 may be cylindrical or spherical, and the guide groove 121 may be arc-shaped or a straight groove, used to limit the degrees of freedom of motion of the second massage arm 420. The parallel arrangement of the first transmission shaft 301 and the second transmission shaft 401 refers to maintaining a parallel spacing between the axes of both shafts in order to optimize the spatial layout.

[0062] Specifically, when the second transmission shaft 401 rotates, the eccentric rotation wheel 410 causes the connecting column 412 to rotate eccentrically through the anti-rotation coupling. Due to the combined action of the inclination angle and eccentric distance of the connecting column 412, the second massage arm 420 generates three-dimensional oscillation driven by the connecting column 412. At this time, the guide block 422 slides along a predetermined trajectory within the guide groove 121, converting the rotational motion of the connecting column 412 into constant-direction oscillation of the second massage arm 420. The parallel arrangement of the first transmission shaft 301 and the second transmission shaft 401 allows the two sets of transmission shafts to form an upper and lower hierarchical layout within the housing 100.

[0063] In some specific embodiments, the swaying wheel 410 may be a split structure, and the stopper ring 411 and connecting column 412 may be fixed by welding or bolting. A self-lubricating bearing may be installed in the second connecting hole 421 of the second massage arm 420 to reduce friction loss with the connecting column 412. The guide groove 121 can employ a sealed U-shaped groove structure, and its groove depth shall be 1.2 to 1.5 times the height of the guide block 422 to ensure that the guide block 422 does not come out of the groove during the motion process.

[0064] In one embodiment of the present invention, the swaying wheel 410 includes a stopper ring 411 and a connecting column 412 that are provided at an angle to each other, and a swaying wheel retaining cover 413 is fixed to one end of the connecting column 412 away from the stopper ring 411 to prevent the second massage arm 420 from falling off the connecting column 412. The second massage arm 420 is rotatably connected to the connecting column 412 via a second connecting hole 421, and a rotating massage head 423 is provided on one side of the second massage arm 420 away from the guide block 422.

[0065] Here, the stopper ring 411 refers to an annular structure that forms a fixed angle with the connecting column 412, and can be realized by using a metal pressed product or an injection molded product, and is used to limit the swing angle range of the second massage arm 420. Here, the swing ring retaining cover 413 refers to a position regulating part that covers the end of the connecting column 412, and can be realized by screw fastening or snap-fit ​​connection, and is used to form an axial constraint and prevent the second massage arm 420 from falling off. Here, the second connecting hole 421 refers to a circular through hole that penetrates the second massage arm 420, and can be realized by using a bearing or bushing structure, and is used to allow the second massage arm 420 to rotate freely around the axis of the connecting column 412. Here, the rotating massage head 423 refers to a massage part that can rotate around its own axis, and can be realized by using a spherical roller or a silicon protrusion structure, and is used to generate a rotational massage motion during the swinging process.

[0066] Specifically, when the second transmission shaft 401 rotates, the eccentric tilting motion of the connecting column 412 is converted into a oscillating motion of the second massage arm 420 through the second connecting hole 421. The oscillating wheel retaining cover 413 is fixed to the end of the connecting column 412 by a rigid connection, preventing its axial displacement during high-speed oscillating motion of the second massage arm 420. The second massage arm 420 rotates adaptively around the axis of the connecting column 412 during the oscillating process due to the rotational combination of the second connecting hole 421 and the connecting column 412, eliminating stress concentration caused by motion interference. The rotating massage head 423 rotates on its own axis during the oscillating process due to the frictional force of its contact surface, forming a combined oscillating and rotating motion trajectory.

[0067] This invention can realize two types of operating modes. 1. Assuming that the drive motor 130 drives the second pulley 211 in the forward direction, the transmission assembly 200 does not rotate the first transmission shaft 301, while the first worm 132 can transmit power to the second transmission shaft 401 in any case. In this case, the clamping and kneading assembly 400 can perform an eccentric clamping and kneading motion. Since the eccentric wheel 430 is installed on the second transmission shaft 401, the eccentric rotation of the eccentric wheel 430 moves the oscillating link 440, which in turn moves the rotating coupling part 321, thereby causing the first massage arm 320 to perform a reciprocating oscillating clamping and kneading motion around the eccentric shaft 310. In this operating mode, the first massage arm 320 and the second massage arm 420 operate simultaneously to achieve a double clamping and kneading operation mode.

[0068] 2. Assuming that the drive motor 130 drives the second pulley 211 in reverse, the transmission assembly 200 can rotationally drive the first transmission shaft 301, and the rotation of the first transmission shaft 301 drives the eccentric rotation of the eccentric shaft 310, thereby enabling the first massage arm 320 to perform a tapping motion. The first massage arm 320 simultaneously performs a reciprocating pinching and kneading motion under the action of the oscillating link 440, and after the two are superimposed, the second massage arm 420 performs a continuous and high-speed tapping motion during the reciprocating oscillating process. The pinching and kneading assembly 400 simultaneously performs an oscillating pinching and kneading motion, and the multifunctional massage assembly 300 realizes pinching and kneading with a tapping motion, and the first massage arm 320 and the second massage arm 420 operate simultaneously to realize a double pinching, kneading, and tapping motion mode.

[0069] It should be noted that the reciprocating oscillation speed and the tapping massage speed of the first massage arm 320 are not synchronized. The reciprocating oscillation is transmitted through the oscillation link 440, while the tapping motion is directly transmitted by the first transmission shaft 301. Since the rotational speed of the first transmission shaft 301 is much higher than that of the second transmission shaft 401, the frequency of tapping increases, occurring constantly during the reciprocating oscillation process, significantly improving the tapping effect. The kneading and tapping motion of the first massage arm 320 is achieved solely by relative rotation to the eccentric shaft 310; that is, both types of motion effects are realized by the eccentric shaft 310. The advantages of this are that it effectively reduces the number of transmission parts, increases transmission efficiency, reduces noise generation, lowers assembly difficulty, ensures a longer service life for the motor transmission structure, and lowers production costs.

[0070] The foregoing are merely examples of the present application and are not intended to limit the scope of protection of this application. Various modifications and changes are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection. [Explanation of Symbols]

[0071] 100, housing; 110, upper housing; 111, lamp cover; 120, lower housing; 121, guide groove; 130, drive motor; 131, first pulley; 132, first worm; 133, first worm wheel; 134, third drive shaft; 135, second worm; 200, transmission assembly; 210, connecting seat; 211, second pulley; 212, first mounting groove; 213, second mounting groove; 214, locking projection; 220, one-way bearing; 221, locking groove; 230, first bearing; 240, transmission belt; 300, Multifunctional massage assembly; 301, First transmission shaft; 310, Eccentric shaft; 311, Locking plate; 312, Third bearing; 313, Locking seat; 320, First massage arm; 321, Rotating coupling; 322, First coupling hole; 323, Massage section; 330, Second bearing; 400, clamping and kneading assembly; 401, second transmission shaft; 410, oscillating wheel; 411, stopper ring; 412, connecting column; 413, oscillating wheel retaining cover; 420, second massage arm; 421, second connecting hole; 422, guide block; 423, rotating massage head; 430, eccentric wheel; 440, oscillating link; 441, pivot shaft; 450, second worm wheel

Claims

1. A multi-functional massage machine core, comprising a drive motor (130) provided within a housing (100), wherein the drive motor (130) is transmitted to a transmission assembly (200), and the transmission assembly (200) is transmitted in one direction to a first transmission shaft (301) to rotate the first transmission shaft (301) in one direction. The transmission assembly (200) includes a connecting seat (210), within which a first bearing (230) and a unidirectional bearing (220) are coaxially provided, and a portion of the connecting seat (210) located outside the first bearing (230) is transmitted to a drive motor (130) such that the first bearing (230) is configured to receive a radial load. A multi-functional massage machine core characterized in that a plurality of multi-functional massage assemblies (300) are provided on the first transmission shaft (301), the drive motor (130) is transmitted to the second transmission shaft (401), a plurality of pinching and kneading assemblies (400) are provided on the second transmission shaft (401), an eccentric wheel (430) is connected to the second transmission shaft (401) to prevent rotation, a swing link (440) is fitted onto the eccentric wheel (430), and one end of the swing link (440) away from the eccentric wheel (430) is movably connected to the multi-functional massage assembly (300).

2. The multi-functional massage machine core according to claim 1, characterized in that the connecting seat (210) is provided with a first mounting groove (212) and a second mounting groove (213) which engage with a first bearing (230) and a unidirectional bearing (220), respectively, a second pulley (211) is formed in a part of the connecting seat (210) located outside the first mounting groove (212), and the second pulley (211) is connected via a transmission belt (240) to a first pulley (131) provided on the output shaft of the drive motor (130).

3. The multifunctional massage machine core according to claim 2, characterized in that the first mounting groove (212) is interlocked with the outer ring of the first bearing (230), the second mounting groove (213) is clearance fitted with the outer ring of the unidirectional bearing (220), a plurality of locking projections (214) are provided in the second mounting groove (213), and a plurality of locking grooves (221) that engage with the locking projections (214) are provided in the outer ring of the unidirectional bearing (220).

4. The multifunctional massage machine core according to claim 1, characterized in that the output shaft of the drive motor (130) includes a first worm (132), a first worm wheel (133) meshes with the first worm (132), the first worm wheel (133) is connected to a second worm (135) via a third transmission shaft (134), and the second transmission shaft (401) is provided with a second worm wheel (450) that meshes with the second worm (135).

5. The multi-functional massage machine core according to claim 1, characterized in that the first transmission shaft (301) and the output shaft of the drive motor (130) are positioned at different heights, and the positioning height of the first transmission shaft (301) is set higher so as to ensure a larger space below the output shaft of the drive motor (130) for housing the battery (500).

6. The multifunctional massage assembly (300) includes a first massage arm (320) fitted onto an eccentric shaft (310), the eccentric shaft (310) being provided on the first transmission shaft (301), the axis of the eccentric shaft (310) being parallel to and non-overlapping with the axis of the first transmission shaft (301), the first massage arm (320) being provided with a rotatable coupling portion (321), the rotatable coupling portion (321) being rotatably connected to the rocking link (440), as described in claim 1.

7. The first massage arm (320) is rotatably connected to an eccentric shaft (310) via a first connecting hole (322), and the first massage arm (320) includes massage parts (323) and a rotatable connecting part (321) provided on both sides of the first connecting hole (322), the rotatable connecting part (321) is rotatably connected to a swing link (440) via a pivot shaft (441), and within the first connecting hole (322) is a second The multifunctional massage machine core according to claim 6, characterized in that a bearing (330) is provided, the inner ring of the second bearing (330) is fitted onto the eccentric shaft (310), the eccentric shaft (310) is provided at both ends of the first transmission shaft (301), a locking plate (311) for locking the second bearing (330) is fitted onto the eccentric shaft (310), and the locking plate (311) is fixed to the first massage arm (320).

8. The multi-functional massage machine core according to claim 6, characterized in that a third bearing (312) is provided on the first transmission shaft (301), a locking seat (313) is provided above the third bearing (312), and the locking seat (313) is fixed to the housing (100) so as to lock the third bearing (312).

9. The multifunctional massage machine core according to claim 1, characterized in that the clamping and kneading assembly (400) includes a swing wheel (410) that is anti-rotatingly connected to a second transmission shaft (401), the swing wheel (410) includes an eccentric and inclined connecting column (412) connected to the second transmission shaft (401), a second massage arm (420) is fitted onto the connecting column (412), a guide block (422) is provided on the second massage arm (420), a guide groove (121) that engages with the guide block (422) is provided on the housing (100), and the first transmission shaft (301) and the second transmission shaft (401) are arranged in parallel.

10. The swaying wheel (410) includes a stopper ring (411) and a connecting column (412) provided at an angle, a swaying wheel retaining cover (413) is fixed to one end of the connecting column (412) away from the stopper ring (411) to prevent the second massage arm (420) from falling off the connecting column (412), the second massage arm (420) is rotatably connected to the connecting column (412) via a second connecting hole (421), and a rotating massage head (423) is provided on one side of the second massage arm (420) away from the guide block (422), characterized in that the multifunctional massage machine core is as described in claim 9.

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