Massager

Abstract

The utility model relates to a massager which comprises a shell, and a walking assembly, a motor and a massage gear assembly used for driving a massage head are assembled in the shell. The walking assembly comprises a shell, a reduction gear set arranged in the shell and a walking gear in transmission with the reduction gear set. The lower end of a second shaft of the reduction gear set extends out of the shell, and the walking gear is coaxially arranged outside the shell. The motor is of a double-end output structure, one output end of the motor drives the massage gear assembly, and the other output end of the motor is connected with a worm and gear assembly in transmission with the reduction gear set through a one-way transmission piece. According to the massager, the single motor is combined with the one-way transmission part, the walking assembly can be driven to move on the rack, and then longitudinal movement of the massager is achieved; meanwhile, fixed-point hovering can be carried out at a proper position, and fixed-point massage is carried out on the user; moreover, the whole structure is simplified, the size is reduced, the product cost is reduced, and the failure rate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of massage structures, in particular to a massager. Background Art

[0002] In today's society, people are increasingly concerned about their health. Back massagers, which can relieve back fatigue and stress, have become popular among consumers. Recumbent back massagers, due to their small size, are easy to carry and use, making them very convenient for both home and office use. However, due to their limited size, the massage heads of traditional back massagers cannot cover all areas of the user's back, failing to meet users' needs for a comprehensive massage.

[0003] To address this issue, massagers with longitudinally movable massage heads have emerged. For example, the massage device disclosed in patent CN103284871A utilizes an additional power motor and transmission structure to drive the longitudinal movement of the massage head, thereby expanding the massage range. However, this design has some significant drawbacks. For example, the additional power motor and transmission structure occupy a large volume, making the entire massager structure more complex and bulky, making it inconvenient to carry and use. Furthermore, the complex structure is prone to malfunction, reducing the reliability and service life of the massager, and thus room for improvement. Utility Model Content

[0004] In order to overcome at least one of the above-mentioned defects of the prior art, according to one aspect of the present invention, a massager is provided, comprising:

[0005] A housing in which a travel assembly, a motor, and a massage gear assembly for driving the massage head are assembled;

[0006] The travel assembly includes a housing, a reduction gear set arranged in the housing, and a travel gear that drives the reduction gear set. The lower end of the second shaft of the reduction gear set extends out of the housing and the travel gear is coaxially arranged outside the housing.

[0007] The motor has a double-end output structure, one output end of the motor drives the massage gear assembly, and the other output end of the motor is connected to the worm gear assembly that drives the reduction gear set through a one-way transmission member;

[0008] Track 1 and a rack assembled on the track 1, the track 1 and the shell are slidably arranged, and the running gear and the rack are meshed.

[0009] In one embodiment of the present application, the worm gear assembly includes a meshing transmission worm and a worm wheel, the transmission worm is in transmission connection with a one-way transmission member, and the worm wheel is in transmission connection with a reduction gear set.

[0010] In one embodiment of the present application, the reduction gear set includes a gear 1, a shaft 1, a gear 2, and a shaft 2, wherein the gear 1 is rotatably disposed in the housing via the shaft 1 and the gear 2.

[0011] The gear 1 is a double gear and includes a first upper gear and a first lower gear arranged coaxially. The worm gear is coaxially provided with a gear 3, the gear 3 is meshed with the first lower gear, and the first upper gear is meshed with the gear 2;

[0012] The diameter of the gear three is smaller than the diameter of the worm gear, the diameter of the first lower gear is larger than the diameter of the first upper gear, and the diameter of the gear two is larger than the diameter of the first upper gear.

[0013] In one embodiment of the present application, the one-way transmission member includes a sleeve and a one-way bearing, the sleeve is sleeved on the other output end of the motor, the one-way bearing is fixed in the sleeve, and the transmission worm is fixed in the one-way bearing.

[0014] In one embodiment of the present application, a rotary bearing is provided at one end of the transmission worm away from the one-way bearing, and the rotary bearing is provided in the housing.

[0015] In one embodiment of the present application, the upper surface of the track facing the housing is provided with a recessed assembly groove, and the rack is waist-shaped and fixed in the assembly groove;

[0016] The outer shell is rotatably arranged in the housing and the rotation center of the whole coincides with the central axis of the shaft 1 of the reduction gear set.

[0017] In one embodiment of the present application, the inner bottom wall of the assembly groove has a waist-shaped guide groove, and the lower end of the second shaft extends out of the bottom of the traveling gear and is slidably arranged with the guide groove.

[0018] In one embodiment of the present application, the rack is an internal tooth structure, the teeth of the rack are arranged toward the inside, the rack is fixed to the circumferential side wall of the assembly groove, and the guide groove is located in the space surrounded by the waist-shaped rack.

[0019] In one embodiment of the present application, the rack is an external tooth structure, the teeth of the rack are arranged toward the inner and outer sides, the rack is fixed in the middle of the assembly groove, and the guide groove is located on the circumferential outer side of the waist-shaped rack.

[0020] In one embodiment of the present application, a pair of pressing blocks are provided at the bottom of the shell, and an assembly cavity for assembling the track 1 is formed between the pair of pressing blocks, and the track 1 is slidably arranged in the assembly cavity.

[0021] In summary, the massager provided by the present invention has the following technical effects:

[0022] The massager of the present application uses a single motor combined with a one-way transmission part to drive the walking component to move on the rack, thereby realizing the longitudinal movement of the massager; at the same time, it can also hover at a suitable position to perform fixed-point massage on the user; and the overall structure is simplified, the volume is reduced, the product cost is reduced, and the failure rate is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a massager according to an embodiment of the present utility model;

[0024] Figure 2 This is an exploded schematic diagram of a massager according to an embodiment of the present utility model;

[0025] Figure 3 This is an exploded schematic diagram of the walking assembly of the massager according to an embodiment of the present utility model;

[0026] Figure 4 This is an exploded schematic diagram of a one-way transmission member and a transmission worm of a massager according to an embodiment of the present utility model;

[0027] Figure 5 This is an exploded schematic diagram of the travel assembly, motor, one-way transmission member and transmission worm of the massager according to an embodiment of the present utility model;

[0028] Figure 6 This is a schematic diagram of the structure of the internal components of the massager according to an embodiment of the present utility model;

[0029] Figure 7 This is a schematic structural diagram of a massage gear assembly of a massager according to an embodiment of the present utility model;

[0030] Figure 8 A cross-sectional view of the internal components of a massager according to an embodiment of the present invention;

[0031] Figure 9 This is a schematic structural diagram of the bottom of the massager according to an embodiment of the present utility model;

[0032] Figure 10 This is a schematic structural diagram of the assembly of the rail 1 and the rack of the massager according to an embodiment of the present utility model;

[0033] Figure 11 This is a schematic structural diagram of the assembly of a track 1 and a rack of a massager according to another embodiment of the present invention;

[0034] Attached figures: 1-housing, 11-upper shell, 12-lower shell, 13-pressing block, 14-fixed convex ring, 2-travel assembly, 211-upper shell, 212-lower shell, 221-gear one, 2211-first upper gear, 2212-first lower gear, 222-shaft one, 223-gear two, 224-shaft two, 23-travel gear, 3-motor, 31-massage worm, 4-massage gear assembly, 41-massage first gear, 42-massage second gear, 43-massage third gear, 44-massage fourth gear, 45-transmission gear, 5-one-way transmission member, 51-sleeve, 52-one-way bearing, 53-rotating bearing, 61-transmission worm, 62-worm wheel, 621-gear three, 7-track one, 71-assembly groove, 72-guide groove, 8-rack, 9-track two. DETAILED DESCRIPTION

[0035] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0038] To better understand the innovative concept of this application, let's first describe the problems encountered by this application. Existing massagers use an additional power motor and transmission structure to drive the massage head's longitudinal movement, thereby expanding the massage range. However, this additional power motor and transmission structure occupy a large volume, complicating the overall structure of the massager. This increased size makes it difficult to carry and use, and the complex structure is also prone to malfunction, reducing the reliability and service life of the massager. Therefore, room for improvement is needed.

[0039] In this regard, the massager of the present application uses a single motor 3 combined with a one-way transmission part 5 to drive the walking component 2 to move on the rack 8, thereby realizing the longitudinal movement of the massager; at the same time, it can also hover at a suitable position to perform fixed-point massage on the user; and the overall structure is simplified, the volume is reduced, the product cost is reduced, and the failure rate is reduced.

[0040] The following is combined with Figures 1-11 The specific scheme of the massager of this application is described.

[0041] Specifically, this massager specifically includes:

[0042] The housing 1 houses a travel assembly 2, a motor 3, and a massage gear assembly 4 for driving the massage head.

[0043] The travel assembly 2 includes a housing, a reduction gear set disposed within the housing, and a travel gear 23 that drives the reduction gear set. The lower end of the second shaft 224 of the reduction gear set extends out of the housing and the travel gear 23 is coaxially disposed outside the housing.

[0044] The motor 3 has a double-end output structure. One output end of the motor 3 drives the massage gear assembly 4. The other output end of the motor 3 is connected to the worm gear 62 driven by the reduction gear set through a one-way transmission member 5.

[0045] Track 1 7 and rack 8 assembled on track 1 7, track 1 7 and housing 1 are slidingly arranged, and running gear 23 and rack 8 are engaged.

[0046] In this embodiment, the motor 3 adopts a double-head output structure, in which the output at one end is used to drive the massage gear assembly 4, thereby realizing the relevant massage actions of the massage head; the output at the other end of the motor 3 is connected to the one-way transmission member 5, and is connected to the worm gear 62 worm assembly through the one-way transmission member 5, and the worm gear 62 worm assembly is then transmitted to the reduction gear group in the walking assembly 2.

[0047] When movement is required, motor 3 operates, and its output drives the worm gear 62, which in turn rotates the reduction gear set. The lower end of shaft 224 of the reduction gear set extends out of the housing, and a travel gear 23 is coaxially disposed outside the housing. As the reduction gear set rotates, so too does travel gear 23. Because travel gear 23 meshes with rack 8 mounted on track 1 (7), and track 1 (7) and housing 1 (1) are arranged to slide, when travel gear 23 rotates, the rack 8 causes the entire housing 1 to slide relative to track 1 (7), thereby enabling the massager to move in a certain direction and achieve the effect of longitudinal movement of the massage head. It should be noted that longitudinal movement in this embodiment refers to movement along the length of rack 8. Therefore, the massage head can also move with the massager, allowing for massage at different locations on the user, thereby expanding the massage area of ​​the massager to meet the user's needs for a comprehensive massage.

[0048] When targeted massage is required, the one-way transmission member 5 enables different operating effects depending on the direction of the motor 3. Specifically, when the motor 3 rotates forward, the one-way transmission member 5 is locked, driving the relevant components to operate normally, achieving normal movement of the massager. When the motor 3 rotates backward, the one-way transmission member 5 is released, acting like a normal bearing, unable to drive the subsequent components to rotate and output torque. At this time, the massager is in a fixed hovering state, thus enabling targeted massage of specific parts, providing users with more massage options.

[0049] As can be seen, the use of a dual-output motor 3 rationally utilizes the two output ends of a single motor 3 to drive the massage gear assembly 4 and the travel assembly 2, respectively. This eliminates the need for additional power sources and complex transmission structures, making the entire massager more compact and its internal space layout more rational. Furthermore, this simplified and compact structure not only reduces failure points and the failure rate, improving the reliability and stability of the massager, but also reduces production costs to a certain extent and enhances the product's market competitiveness. Furthermore, the rational structural design also helps improve energy efficiency, reduce power consumption, and extend the massager's operating time.

[0050] It can also be seen that different working states of the motor 3 under different rotation directions, namely longitudinal movement and fixed-point hovering, are achieved through the one-way transmission member 5, which increases the functional diversity and flexibility of the massager. Users can choose a suitable massage mode according to their own needs, which can realize the fixed-point massage of the massage head and the longitudinal wandering function of the massager as a whole, enriching the use of the massager, improving the coverage and effect of the massage, and better meeting the user's massage needs for different positions on the back.

[0051] In summary, this massager can not only realize longitudinal movement to massage different parts of the user, thereby increasing the massage area of ​​the massager; at the same time, it can also perform targeted massage on specific parts, thereby providing users with more massage options.

[0052] Specifically, the housing 1 may include an upper shell 11 and a lower shell 12 , and the upper shell 11 and the lower shell 12 are detachably assembled.

[0053] When assembling the massager, the internal components such as the travel assembly 2, motor 3, and massage gear assembly 4 can be placed in the lower shell 12. Since the upper shell 11 and the lower shell 12 are detachably assembled, the upper shell 11 can be easily covered on the lower shell 12 and fixed by connecting means such as buckles, screws, or slots to form a complete shell 1 structure and protect the internal components.

[0054] With this arrangement, the detachable upper shell 11 and lower shell 12 structure makes the assembly process of the massager on the production line more convenient; workers can pre-install the components in the lower shell 12 separately, and then cover the upper shell 11 to complete the final assembly. This step-by-step assembly method helps to improve production efficiency and reduce production costs.

[0055] Specifically, the housing may include an upper housing 211 and a lower housing 212 , and the upper housing 211 and the lower housing 212 are detachably assembled.

[0056] When assembling the massager's travel assembly 2, first place the gear 1 221, shaft 1 222, gear 2 223, and shaft 2 224 within the lower housing 212. Since the upper and lower housings 211 and 212 are detachably assembled, the upper housing 211 can be placed over the lower housing 212 and secured using snaps, screws, or slots (depending on the design), thereby forming a complete housing that encapsulates and protects the internal components.

[0057] With such an arrangement, for the production process of the massager, the detachable upper shell 211 and lower shell 212 structure make the assembly of the walking component 2 more convenient. Workers can pre-install the components in the lower shell 212 separately, and then cover the upper shell 211 to complete the final assembly. This step-by-step assembly method helps to improve production efficiency and reduce production costs.

[0058] Furthermore, this structure provides significant convenience for maintenance personnel. When inspecting or repairing components within the travel assembly 2, the outer shell can be opened without complex tools or destructive disassembly methods. This not only shortens repair time and difficulty, but also reduces repair costs. The removable outer shell also facilitates routine maintenance, such as cleaning internal components or inspecting vulnerable parts.

[0059] Specifically, a pair of pressing blocks 13 are provided at the bottom of the lower shell 12 of the housing 1, and a space for the track 7 to slide is formed between the pair of pressing blocks 13.

[0060] When the massager is assembled, track 7 is placed in the space formed between a pair of pressing blocks 13; since track 7 and the space are slidingly arranged, track 7 can be smoothly installed in this space; and this pair of pressing blocks 13 plays a role in positioning and limiting the position of track 7, ensuring that track 7 can be accurately installed in the assembly cavity and can slide along the specified direction during subsequent work.

[0061] When the massager begins operating, motor 3 drives travel gear 23 in travel assembly 2 to rotate, meshing with rack 8 mounted on track 1-7. Because track 1-7 and the assembly cavity at the bottom of lower housing 12 are arranged to slide, as travel gear 23 rolls along rack 8, the assembly cavity of housing 1 slides against track 1-7. This sliding motion enables the massager's overall structure to achieve stable longitudinal movement, ensuring that the massage head can move along the user's back in the desired trajectory.

[0062] With this arrangement, the assembly cavity formed by the pair of pressing blocks 13 provides a precise mounting position for Track 1, ensuring accuracy during initial installation. During operation, this sliding arrangement constrains Track 1's movement within the permitted range of the assembly cavity, preventing Track 1's movement from deflecting or shaking. This ensures stable longitudinal movement of the massager, improving massage precision and enabling the massage head to better cover all areas of the user's back.

[0063] Specifically, the massager further includes a track 2 9, and another pair of pressing blocks 13 are provided at the bottom of the lower shell 12 of the shell 1, and a space for the sliding setting of the track 2 9 is formed between the other pair of pressing blocks 13; the track 1 7 and the track 2 9 are spaced apart and distributed at the bottom of the lower shell 12 of the shell 1.

[0064] During assembly of the massager, Track 2 9 is placed within the space formed between another pair of pressure blocks 13. Because this space is designed for Track 2 9 to slide, Track 2 9 is able to slide within the constraints of the pressure blocks 13. Furthermore, Track 1 7 and Track 2 9 are spaced apart at the bottom of the lower shell 12 of the housing 1, providing similar support and guidance during the massager's movement. When the massager performs a longitudinal massage, Track 1 7 and Track 2 9 simultaneously contact and slide with the corresponding support structure (such as the mating portion on the base, the pressure blocks 13), sharing the massager's weight, effectively preventing it from tilting or shaking, and ensuring it moves smoothly along the predetermined path on the base.

[0065] With this arrangement, the synergistic effect of Track 1 7 and Track 2 9 can further limit the movement direction and range of the massager, allowing the massager to move longitudinally along the designed path more accurately. This precise motion control can improve the coverage accuracy of the massage head on the user's back, thereby improving the massage effect and ensuring the safety and comfort of the massage process.

[0066] Specifically, the worm gear 62 worm assembly includes a meshing transmission worm 61 and a worm gear 62, wherein the transmission worm 61 is in transmission connection with the one-way transmission member 5, and the worm gear 62 is in transmission connection with the reduction gear set. The worm gear 62 can be specifically a helical gear.

[0067] When the end of the dual-ended output of motor 3 that drives travel begins operating, power is first transmitted to one-way transmission member 5. Specifically, one-way transmission member 5 can be configured to transmit power normally when motor 3 rotates in the forward direction. Power is then transmitted from one-way transmission member 5 to transmission worm 61. Simultaneously, transmission worm 61 and worm wheel 62 engage with each other. When transmission worm 61 receives power and begins to rotate, it drives worm wheel 62 to rotate synchronously. The rotational motion of worm wheel 62 is then transmitted to the reduction gear set, which, through the transmission of the reduction gear set, ultimately drives travel gear 23 to rotate. Finally, travel gear 23 engages with rack 8 on track 7. When travel gear 23 rotates, the massager's housing 1 moves relative to track 7, achieving directional movement of the massager and completing the longitudinal travel function of the massage head.

[0068] It should be noted that the one-way transmission member 5 plays a key control role in this process; when the motor 3 reverses, the one-way transmission member 5 is loosened, and the power cannot be effectively transmitted to the transmission worm 61, and the transmission worm 61 and worm wheel 62 assembly stops working. This feature enables the massager to control whether the walking component 2 is working according to the direction of the motor 3, thereby realizing different massage functions such as fixed-point massage.

[0069] The purpose of adopting the worm gear 62 structure is that the worm gear 62 assembly has a large transmission ratio, which can achieve efficient deceleration. During the process of power transmission from the motor 3 to the travel gear 23, the deceleration of the worm gear 62 can convert the high-speed rotation of the motor 3 into a low-speed, high-torque rotation suitable for the travel gear 23. This helps the massager to move more stably and more powerfully on the rack 8 during movement, ensuring that the massager can achieve smooth longitudinal movement, especially when facing certain resistance (such as pressure generated by the contact between the massager and the user's back).

[0070] Moreover, due to the meshing characteristics of the worm gear 62, they can achieve a self-locking function, which means that when the worm gear 62 is stationary, the transmission worm gear 61 cannot drive the worm gear 62 to rotate by itself, so that the massager can be accurately controlled to remain stationary when it is not desired to move (such as during a fixed-point massage); this precise control makes the movement mode of the massager more diverse and can better meet the different massage needs of users. For example, when the user only wants to perform a concentrated massage at a specific location, the one-way transmission member 5 can be loosened by controlling the motor 3 to reverse and stop the massager from moving.

[0071] More importantly, during the transmission process, the worm wheel 62 worm assembly, due to its unique shape and transmission method, can achieve a larger transmission ratio in a relatively small space; this is very beneficial for products such as massagers that have high space requirements, and helps to make the internal structure of the massager more compact and reasonably utilize limited space to layout other components, such as the massage gear assembly 4, the travel assembly 2, etc., thereby reducing the overall volume of the massager.

[0072] Specifically, the reduction gear group includes gear one 221, shaft one 222, gear two 223 and shaft two 224. Gear one 221 is rotatably arranged in the housing through shaft one 222 and gear two 223. Gear one 221 is a double gear and includes a first upper gear 2211 and a first lower gear 2212 arranged coaxially. The worm gear 62 is coaxially provided with gear three 621. Gear three 621 and the first lower gear 2212 are meshed, and the first upper gear 2211 and the gear two 223 are meshed. The diameter of gear three 621 is smaller than the diameter of the worm gear 62, the diameter of the first lower gear 2212 is larger than the diameter of the first upper gear 2211, and the diameter of gear two 223 is larger than the diameter of the first upper gear 2211.

[0073] During specific operation, power is transmitted from the worm wheel 62 of the worm assembly, and the coaxial gear three 621 of the worm wheel 62 first engages with the first lower gear 2212 of the reduction gear group. Since the diameter of the gear three 621 is smaller than the diameter of the worm wheel 62, the first deceleration and torque amplification are achieved when transmitting power.

[0074] The first lower gear 2212 is part of a double gear (i.e., gear one 221) and is coaxial with the first upper gear 2211. The first upper gear 2211, in turn, meshes with gear two 223. The diameter of the first lower gear 2212 is larger than that of the first upper gear 2211, while the diameter of gear two 223 is larger than that of the first upper gear 2211. Thus, during the process of power being transmitted from the first lower gear 2212 through the first upper gear 2211 to the second gear 223, a double reduction in speed and torque amplification occurs.

[0075] Finally, the power is transmitted from the second gear 223 to the traveling gear 23 via the second shaft 224, driving the traveling gear 23 to rotate, thereby realizing the movement of the massager on the rack 8.

[0076] It should be noted that throughout the power transmission process, due to the diameter relationship of the various gears, the higher-speed, lower-torque power input from worm gear 62 is gradually converted into lower-speed, higher-torque power suitable for the travel gear 23 to drive the massager. For example, when worm gear 62 rotates at a relatively high speed, the speed decreases and the torque increases as it passes through the first lower gear 2212 meshing with the smaller-diameter gear 3 621. The speed further decreases and the torque increases as it meshes with the first upper gear 2211 and gear 2 23, which have different diameters. Ultimately, the travel gear 23 obtains the appropriate power parameters to propel the massager.

[0077] This arrangement, through the carefully designed gear diameter ratio, allows for precise adjustment of the power output speed and torque. This precise control ensures that the travel gear 23 rolls on the rack 8 at the appropriate speed and with sufficient force, allowing the massager to cover an adequate massage area while preventing the massage effect from being compromised by excessive speed or insufficient force. For example, when the massager needs to move slowly but forcefully across the user's back, this reduction gear design can meet this requirement.

[0078] Furthermore, the combination of the double-gear gear 221 and a plurality of gears of different diameters can realize a complex power adjustment function while being arranged in a relatively compact housing. This compact design helps to reduce the overall volume of the massager, making the internal structure of the massager more reasonable and avoiding the waste of space caused by the large-scale use of a single large gear or a complex transmission structure to achieve the same function.

[0079] Specifically, the one-way transmission member 5 includes a sleeve 51 and a one-way bearing 52 . The sleeve 51 is sleeved on the other output end of the motor 3 . The one-way bearing 52 is fixed in the sleeve 51 . The transmission worm 61 is fixed in the one-way bearing 52 .

[0080] During specific operation, forward rotational power transmission can be specifically set up. For example, when the other output end of the motor 3 rotates forward, since the sleeve 51 is sleeved on the output end of the motor 3, the sleeve 51 will rotate therewith; the one-way bearing 52 fixed in the sleeve 51 will be in a stuck state during forward rotation, and the rotational motion will be transmitted to the transmission worm 61 fixed in the one-way bearing 52.

[0081] The reverse rotation power is interrupted. For example, when the other output end of the motor 3 rotates in the reverse direction, the one-way bearing 52 will loosen. At this time, although the output end of the motor 3 and the sleeve 51 are still rotating, due to the characteristics of the one-way bearing 52, the rotation power cannot be effectively transmitted to the transmission worm 61. The transmission worm 61 is in a stationary state, and the entire transmission chain related to the transmission worm 61 (worm wheel 62, reduction gear set and travel gear 23) also stops working, so that the massager stops moving longitudinally, and it is possible to achieve functions such as fixed-point massage.

[0082] As can be seen, the characteristics of the one-way transmission member 5 allow the massager to easily achieve two different operating modes depending on the rotation direction of the motor 3. For example, during forward rotation, the massager can perform longitudinal roaming massage with the massage head, expanding the massage range; during reverse rotation, the massager can stop roaming and perform a fixed massage, meeting the user's needs for concentrated massage of specific parts, thereby increasing the massager's functional diversity.

[0083] Furthermore, the operating characteristics of the one-way bearing 52 enable precise control of the massager's motion state. Simply by controlling the rotational direction of the motor 3, the massager can clearly determine whether it performs a wandering massage or a fixed-point massage. This precise control helps improve the user experience, allowing users to conveniently select the appropriate massage method based on their preferences and physical condition. Furthermore, from a control perspective, utilizing the one-way transmission element 5 to achieve different massage functions eliminates the need for complex electronic control devices to individually control the start and stop of each component. Simply controlling the rotational direction of the motor 3 allows the massager's motion state to be switched, simplifying the massager's control system to a certain extent and reducing cost and complexity.

[0084] In other embodiments, the one-way transmission member 5 may be specifically an overrunning clutch, a one-way ratchet and pawl mechanism, or a one-way friction clutch, etc., which can also achieve the above functions and effects.

[0085] Specifically, a rotating bearing 53 is provided at one end of the transmission worm 61 away from the one-way bearing 52 , and the rotating bearing 53 is disposed in the housing 1 .

[0086] When the motor 3 rotates forward, power is transmitted to the transmission worm 61 through the one-way transmission member 5, and the transmission worm 61 starts to rotate. A rotating bearing 53 is provided at the end of the transmission worm 61 away from the one-way bearing 52. This rotating bearing 53 is installed in the housing 1. The rotating bearing 53 supports the transmission worm 61, so that the transmission worm 61 has a stable fulcrum during the rotation process.

[0087] Furthermore, as the transmission worm 61 rotates, it meshes with the worm wheel 62, transmitting power to the worm wheel 62. During this process, the rotating bearing 53 ensures that the rotation axis of the transmission worm 61 remains stable, reducing the shaking and deviation of the transmission worm 61 during rotation, thereby ensuring the meshing accuracy between the transmission worm 61 and the worm wheel 62, allowing power to be accurately and efficiently transmitted from the transmission worm 61 to the worm wheel 62.

[0088] Since the rotating bearing 53 provides stable support for the transmission worm 61, the position accuracy of the transmission worm 61 during the rotation process is improved; this is very critical for the engagement of the transmission worm 61 and the worm wheel 62, because precise engagement can reduce energy loss and vibration during power transmission; when the transmission worm 61 can accurately transmit power to the worm wheel 62, the motion control of the entire massager is more precise, for example, the movement speed and position control of the massager on the rack 8 will be more accurate, which is conducive to improving the massage effect.

[0089] At the same time, precise support ensures smoother rotation of the drive worm 61, reducing vibrations caused by shaking or instability. This reduced vibration effectively reduces noise during operation, providing a quieter massage environment. Furthermore, smooth power transmission helps reduce vibration-induced resonance within the massager's internal structure, further enhancing operational stability and comfort.

[0090] Specifically, an assembly groove 71 is recessed on the upper surface of the track 7 facing the shell 1, and the rack 8 is waist-shaped and fixed in the assembly groove 71; the outer shell is rotatably arranged in the shell 1 and the overall rotation center coincides with the central axis of the shaft 222 of the reduction gear set.

[0091] When the massager is operating, the travel gear 23 in the travel assembly 2 meshes with the rack 8. Because rack 8 is waist-shaped, the travel gear 23 follows the waist-shaped trajectory as it rolls on the rack 8. This shape of rack 8 provides a specific path for the massager's reciprocating motion, giving the massage head a clear range and direction of longitudinal movement, enabling reciprocating motion within a defined area, effectively covering the corresponding area on the user's back.

[0092] In addition, the outer shell is rotatably arranged in the shell body 1, and its rotation center coincides with the central axis of the shaft 222 of the reduction gear set; when the traveling gear 23 moves on the waist-shaped rack 8, since the shape of the rack 8 is not a straight line, but a waist-shaped shape that can realize reciprocating motion, the trajectory of the traveling gear 23 is specifically waist-shaped, which means that the traveling gear 23 will generate forces in different directions on the outer shell when it is in different positions, so the outer shell needs to be movably set, otherwise interference problems will occur.

[0093] Therefore, the outer shell is rotatably arranged in the shell body 1, with the central axis of the shaft 222 as the rotation center. The outer shell can be appropriately rotated according to the position and force conditions of the traveling gear 23 on the rack 8, thereby ensuring that the traveling gear 23 and the rack 8 always maintain a good meshing state. In this process, the reciprocating travel system of the entire massager can adapt to the shape of the rack 8 and achieve stable movement.

[0094] It can be seen that the design of the waist-shaped rack 8 makes the longitudinal movement path of the massage head no longer limited to a straight line, but can reciprocate in a specific area that is more in line with the human back curve or massage needs. This helps to expand the effective massage coverage of the massager on the user's back, and can better massage different parts of the back, thereby improving the comprehensiveness and comfort of the massage.

[0095] In addition, the outer shell rotates with the central axis of shaft 1 222 as the rotation center, and can adjust the meshing state of the traveling gear 23 and the rack 8 in real time. No matter where the traveling gear 23 is on the waist-shaped rack 8, good contact and transmission between the two can be guaranteed. This dynamic adjustment mechanism reduces the problems of transmission instability and gear jumping caused by changes in the shape of the rack 8 or uneven force on the traveling gear 23, ensuring that power can be accurately transmitted from the traveling gear 23 to the rack 8, thereby realizing the precise movement of the massager and improving the accuracy of the massage.

[0096] Specifically, a fixed protrusion ring 14 is provided at the inner bottom wall of the lower shell 12 of the housing 1, and the shaft 1 222 can be rotatably set at the fixed protrusion ring 14 to form a positioning position of the rotation center of the outer shell of the walking component 2, so as to facilitate positioning and assembly of the shaft 1 222.

[0097] Specifically, the inner bottom wall of the assembly groove 71 has a waist-shaped guide groove 72 , and the lower end of the second shaft 224 extends out of the bottom of the traveling gear 23 and is slidably arranged in the guide groove 72 .

[0098] When the massager starts working, the motor 3 drives the traveling gear 23 of the traveling assembly 2 to rotate. Since the traveling gear 23 is engaged with the waist-shaped rack 8, the traveling gear 23 will roll along the rack 8, thereby driving the massager housing 1 to move relative to the track 7.

[0099] At the same time, the lower end of the second shaft 224 extends out of the bottom of the traveling gear 23 and slides with the waist-shaped guide groove 72 on the bottom wall of the assembly groove 71 of the track 1 7. When the traveling gear 23 moves along the rack 8, the second shaft 224 will slide in the guide groove 72. Because the guide groove 72 is also waist-shaped, its shape matches the shape of the rack 8, so the sliding trajectory of the second shaft 224 is consistent with the movement trajectory of the traveling gear 23 on the rack 8.

[0100] This matching relationship enables the second shaft 224 to move synchronously with the movement of the travel gear 23 under the constraint of the guide groove 72, and provides additional guidance and support for the entire reciprocating travel system.

[0101] In this way, the sliding arrangement of the second shaft 224 and the guide groove 72 provides stable support for the movement of the traveling gear 23. When the traveling gear 23 is subjected to the force from the rack 8 (such as at a turn or due to the force generated by the load change), the second shaft 224 can balance these forces by sliding in the guide groove 72 to prevent the traveling gear 23 from being offset or shaking, thereby ensuring the meshing accuracy between the traveling gear 23 and the rack 8. This enables the massager to run more smoothly during the entire reciprocating motion process, avoiding the situation where the massage effect is poor or the components are damaged due to unstable movement.

[0102] Furthermore, the waist-shaped guide slot 72 and rack 8 match each other, strictly defining the motion trajectory of shaft 224 and travel gear 23. This precise trajectory control ensures that the massager's reciprocating path meets design requirements, allowing the massage head to accurately cover the intended massage area. For example, in a massage path designed to simulate the curve of the human back, the coordination between guide slot 72 and rack 8 ensures that the massage head follows the designed curved trajectory, improving the accuracy and effectiveness of the massage.

[0103] Specifically, the rack 8 is an internal tooth structure, the teeth of the rack 8 are arranged to face inward, the rack 8 is fixed to the circumferential side wall of the assembly groove 71, and the guide groove 72 is located in the space surrounded by the waist-shaped rack 8.

[0104] When the massager begins operating, motor 3 drives travel assembly 2, causing travel gear 23 to begin rotating. Because rack 8 has an internally toothed structure with its teeth facing inward, travel gear 23 meshes with the inner teeth of rack 8. As motor 3 continues to drive, travel gear 23 rolls along the inner teeth of rack 8, driving massager housing 1 relative to track 7. During this process, because rack 8 is secured to the circumferential sidewalls of mounting slot 71, the motion of travel gear 23 is constrained by the shape and position of rack 8, resulting in a waist-shaped path defined by the circumferential sidewalls of mounting slot 71.

[0105] The internally toothed rack 8 is fixed to the circumferential side wall of the assembly groove 71, making the arrangement of the rack 8 more compact and effectively utilizing the space of the track-7 assembly groove 71. That is, the internally toothed rack 8 can provide sufficient meshing length and movement path for the traveling gear 23 without increasing the size of the track-7, which helps to reduce the overall volume of the massager.

[0106] Furthermore, the teeth of the internally toothed rack 8 face inward, making them less susceptible to external influences (such as dust, collisions with foreign objects, etc.). This helps protect the tooth structure of the rack 8, reduces tooth wear or damage caused by external interference, and increases the service life and reliability of the rack 8. Furthermore, since the teeth are located internally, the risk of injury from accidental contact with the teeth during use is reduced, thereby improving the safety of the massager.

[0107] More importantly, the meshing of the running gear 23 with the internally toothed rack 8, and the coordinated movement of the second shaft 224 and the guide slot 72, precisely control the massager's trajectory. Because the shape and position of the rack 8 are fixed, the running gear 23's movement path along its inner teeth is very well-defined. Combined with the guidance of the guide slot 72, the massager maintains a stable reciprocating motion along the designed waist-shaped path. This precise motion control ensures that the massage head accurately covers specific areas of the user's back, achieving a more uniform and effective massage effect, and better conforming to the curves of the back.

[0108] Of course, in some other embodiments, the rack 8 may be an external tooth structure, with the teeth of the rack 8 facing the inner and outer sides, the rack 8 is fixed in the middle of the assembly groove 71, and the guide groove 72 is located on the circumferential outer side of the waist-shaped rack 8.

[0109] When the massager is operating, motor 3 drives travel gear 23 in travel assembly 2 to rotate. Since rack 8 has an external tooth structure with teeth facing outward, travel gear 23 meshes with the outer teeth of rack 8. As power is transmitted from motor 3, travel gear 23 rolls along the outer teeth of rack 8. This rolling motion drives the entire massager housing 1 relative to track 7. Because rack 8 is fixed in the middle of mounting slot 71 and has a waist shape, travel gear 23 performs a circular reciprocating motion along the outer teeth of waist-shaped rack 8, thereby achieving longitudinal movement of the massager within a certain range.

[0110] The design of fixing the externally toothed rack 8 in the middle of the assembly groove 71 makes the rack 8 more intuitive and convenient during installation. In other words, the externally toothed rack 8 is easier to position and secure, reducing the complexity of the installation process. In terms of maintenance, if the rack 8 becomes worn or damaged, the externally toothed rack 8 is easier to observe and access, making it easier for maintenance personnel to inspect, repair, or replace it, reducing maintenance costs and difficulty.

[0111] For example, because the teeth face outward, the teeth of the externally toothed rack 8 are more easily exposed to the external environment, making it easier to observe the meshing between the rack 8 and the travel gear 23 during operation. Any abnormalities, such as tooth wear or foreign objects, can be discovered promptly. Furthermore, the outward-facing teeth also facilitate heat dissipation. During prolonged operation of the massager, friction between the gears generates heat. This structure of the externally toothed rack 8 helps dissipate heat more quickly into the surrounding environment, reducing the risk of component damage due to overheating.

[0112] Similarly, the meshing of the travel gear 23 and the externally toothed rack 8, and the coordination of the second shaft 224 and the guide slot 72, ensure the massager's stable reciprocating motion. Guided by the guide slot 72, the second shaft 224, in conjunction with the rolling motion of the travel gear 23 on the rack 8, precisely controls the massager's motion trajectory. This precise control allows the massage head to follow a designed waist-shaped path back and forth across the user's back, effectively covering the entire back area and providing a precise and effective massage service to meet the user's massage needs.

[0113] Specifically, the massage gear assembly 4 may include a first massage gear 41, a second massage gear 42, a third massage gear 43 and a fourth massage gear 44, wherein the first massage gear 41 can be connected to the massage worm 31 provided at an output end of the motor 3, the second massage gear 42 and the first massage gear 41 are coaxially arranged, and the diameter of the second massage gear 42 is smaller than the diameter of the first massage gear 41; the third massage gear 43 and the second massage gear 42 are meshed, and the diameter of the third massage gear 43 is larger than the diameter of the second massage gear 42; a pair of meshing transmission gears 45 are connected between the fourth massage gear 44 and the third massage gear 43, and the diameters of the fourth massage gear 44 and the third massage gear 43 are the same and larger than the diameter of the transmission gear 45; the fourth massage gear 44 and the third massage gear 43 are each used to drive the massage head.

[0114] When the massage gear assembly 4 is driven by an output terminal of the motor 3, power is first transmitted from the massage worm 31 at one output terminal of the motor 3 to the first massage gear 41. Since the second massage gear 42 is coaxially arranged with the first massage gear 41, the first massage gear 41 drives the second massage gear 42 to rotate synchronously. The diameter of the second massage gear 42 is smaller than that of the first massage gear 41. According to the principle of gear transmission, the speed output by the second massage gear 42 is lower than the speed input by the first massage gear 41, and the torque is greater. Next, the second massage gear 42 meshes with the third massage gear 43, which has a larger diameter than the second massage gear 42. This step achieves both speed reduction and torque amplification, resulting in a lower speed and increased torque transmitted to the third massage gear 43.

[0115] The third massage gear 43 and the fourth massage gear 44 are connected by a pair of meshing transmission gears 45. Because the diameters of the fourth massage gear 44 and the third massage gear 43 are the same and larger than the diameter of the transmission gear 45, when power is transmitted from the third massage gear 43 to the fourth massage gear 44 through the transmission gear 45, the speed and torque remain relatively stable. Finally, the third massage gear 43 and the fourth massage gear 44 each drive the massage head to move.

[0116] In addition, the rotational movement of the third massage gear 43 and the fourth massage gear 44 directly drives the massage head, causing the massage head to produce corresponding massage movements. Since the movement of the third massage gear 43 and the fourth massage gear 44 is obtained through the transmission of the previous series of gears, their speed and torque have been adjusted according to design requirements, which can provide appropriate power for the massage head, so that the massage head can massage at an appropriate speed and strength.

[0117] This arrangement, through the combination and transmission of multiple gears of different diameters, allows for precise adjustment of the massage head's speed and intensity. This also helps ensure a more uniform massage speed and intensity across the two massage heads. Furthermore, the use of multiple meshing gears of varying diameters allows for complex power adjustment while remaining within a relatively compact footprint. This compact design helps reduce the massager's overall size, making its internal structure more streamlined and avoiding the space waste associated with the use of numerous large gears or complex transmission structures to achieve the same function.

[0118] The technical means disclosed in the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A massager, characterized in that: include: A housing (1), wherein a travel assembly (2), a motor (3), and a massage gear assembly (4) for driving a massage head are assembled in the housing (1); The travel assembly (2) includes a housing, a reduction gear set arranged in the housing, and a travel gear (23) that drives the reduction gear set. The lower end of the second shaft (224) of the reduction gear set extends out of the housing, and the travel gear (23) is coaxially arranged outside the housing. The motor (3) has a double-end output structure, one output end of the motor (3) drives the massage gear assembly (4), and the other output end of the motor (3) is connected to a worm wheel (62) and a worm assembly driven by a reduction gear set through a one-way transmission member (5); Track 1 (7) and a rack (8) assembled on track 1 (7), the track 1 (7) and the housing (1) are slidably arranged, and the traveling gear (23) and the rack (8) are meshed.

2. A massager according to claim 1, characterized in that: The worm wheel (62) and worm assembly include a meshing transmission worm (61) and a worm wheel (62), the transmission worm (61) is in transmission connection with a one-way transmission member (5), and the worm wheel (62) is in transmission connection with a reduction gear set.

3. A massager according to claim 2, characterized in that: The reduction gear set includes a gear 1 (221), a shaft 1 (222), a gear 2 (223) and a shaft 2 (224), wherein the gear 1 (221) is rotatably arranged in the housing via the shaft 1 (222) and the gear 2 (223). The gear one (221) is a double gear and includes a first upper gear (2211) and a first lower gear (2212) arranged coaxially. The worm gear (62) is coaxially provided with a gear three (621). The gear three (621) is meshed with the first lower gear (2212). The first upper gear (2211) is meshed with the gear two (223). The diameter of the gear three (621) is smaller than the diameter of the worm gear (62), the diameter of the first lower gear (2212) is larger than the diameter of the first upper gear (2211), and the diameter of the gear two (223) is larger than the diameter of the first upper gear (2211).

4. A massager according to claim 2, characterized in that: The one-way transmission member (5) comprises a sleeve (51) and a one-way bearing (52); the sleeve (51) is sleeved on the other output end of the motor (3); the one-way bearing (52) is fixed in the sleeve (51); and the transmission worm (61) is fixed in the one-way bearing (52).

5. A massager according to claim 4, characterized in that: A rotary bearing (53) is provided at one end of the transmission worm (61) away from the one-way bearing (52), and the rotary bearing (53) is provided in the housing (1).

6. A massager according to any one of claims 1 to 5, characterized in that: The upper surface of the track (7) facing the housing (1) is provided with a recessed assembly groove (71), and the rack (8) is waist-shaped and fixed in the assembly groove (71); The outer shell is rotatably arranged in the housing (1) and the rotation center of the whole coincides with the central axis of the shaft 1 (222) of the reduction gear set.

7. A massager according to claim 6, characterized in that: The inner bottom wall of the assembly groove (71) has a waist-shaped guide groove (72), and the lower end of the second shaft (224) extends out of the bottom of the traveling gear (23) and is slidably arranged with the guide groove (72).

8. A massager according to claim 7, characterized in that: The rack (8) is an internal tooth structure, wherein the teeth of the rack (8) are arranged inwardly, the rack (8) is fixed to the circumferential side wall of the assembly groove (71), and the guide groove (72) is located in the space surrounded by the waist-shaped rack (8).

9. The massager according to claim 7, characterized in that: The rack (8) is an external toothed structure, wherein the teeth of the rack (8) are arranged toward the inner and outer sides, the rack (8) is fixed in the middle of the assembly groove (71), and the guide groove (72) is located on the circumferential outer side of the waist-shaped rack (8).

10. A massager according to any one of claims 1-5, 7-9, characterized in that: A pair of pressing blocks (13) are provided at the bottom of the housing (1), and an assembly cavity for assembling the track 1 (7) is formed between the pair of pressing blocks (13), and the track 1 (7) is slidably arranged in the assembly cavity.

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