A push-kneading massage structure

Abstract

The utility model relates to the technical field of massage apparatus, concretely relates to a push and rub massage structure. First protruding part of eccentricity setting on drive gear cooperation swing piece, convert motor rotation into eccentric motion, swing arm conversion is plane swing, again through the oblique angle seat inclination guide forms push and rub compound action, simulates artificial push and rub technique. The swing piece is sleeved on the first protruding part, and the second through groove is sleeved on the swing piece outside, make point contact change for line and line contact, increase contact area, reduce stress concentration, reduce wear and tear significantly, prolong life. Each component realizes positioning transmission through the set, and need not additional fastener, compact structure, convenient assembly. First protruding part passes through the upper shell first through groove and extends to the outside, and the swing piece is directly sleeved and installed, simplifies transmission path, reduces energy loss, improves transmission efficiency.

Description

Technical Field

[0001] This utility model relates to the field of massage equipment technology, specifically to a kneading massage structure, which is mainly used in the fields of cervical and lumbar spine massagers, back massagers, massage cushions and handheld massage devices. Background Technology

[0002] Existing massage structures are mainly divided into two types: rotary massage and percussion massage. Rotary massage typically uses an eccentric wheel to drive the massage head in a rotating motion, applying circular kneading pressure to the body parts; percussion massage uses a cam or crank-connecting rod mechanism to drive the massage head in a reciprocating linear motion, achieving vertical percussion. However, the above-mentioned existing massage structures still have the following shortcomings: First, most existing massage structures can only achieve a single rotational movement or reciprocating tapping movement, which is difficult to simulate the combined "pushing" and "kneading" movements in manual massage techniques. This results in a single massage effect, which cannot meet users' diverse needs for deep muscle relaxation and acupoint stimulation.

[0003] Secondly, most existing massage structures use point-contact transmission, such as the use of pins and slots to transmit motion. In this point-contact transmission method, the contact area is small, leading to severe localized stress concentration and making the contact points extremely prone to wear. After a period of use, the massage structure experiences increased wear, resulting in problems such as shaking and increased noise, seriously affecting the product's lifespan and user experience.

[0004] Third, existing massage structures generally suffer from long transmission paths, numerous parts, and an overall structure that is not compact enough. This not only increases assembly difficulty and manufacturing costs but also hinders the miniaturization and lightweight design of massage devices.

[0005] To address the aforementioned issues, there is an urgent need in this field for a kneading massage structure that can achieve combined kneading and pushing movements, has high durability in transmission connections, and a compact structure. Utility Model Content

[0006] This utility model provides a kneading massage structure, which aims to solve the technical problems of existing massage structures that make it difficult to achieve combined kneading and pushing movements, easy wear of transmission components, and insufficient overall compactness.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A kneading massage structure includes a housing, which is formed by an upper shell and a lower shell covering each other. The housing has a first cavity and a second cavity located on one side of the first cavity. The first cavity has a motor, the second cavity has a transmission component, and the housing has a massage drive component on the outside of the housing corresponding to the position of the transmission component. The transmission assembly includes a transmission gear and a drive gear. The transmission gear is connected to the output shaft of the motor and to the drive gear. The drive gear has an eccentrically positioned first protrusion on one end face facing the upper shell. The upper shell has a first through groove for the first protrusion to protrude to its outside. The end face of the first protrusion protruding to the outside of the upper shell has a first insertion part. The massage drive assembly includes a movable plate, a swing arm, an angled seat, and a mounting base. The movable plate is fitted onto the first protrusion. The swing arm has a second through groove in its middle, which is fitted onto the outside of the movable plate. The outer surface of the side wall of the upper shell has a second protrusion. One end of the swing arm has a sleeve hole fitted onto the second protrusion, and the other end of the swing arm has a second limiting post. One side of the angled seat facing the swing arm is parallel to the swing surface formed by the swing arm's swing, and this side has a second insertion part that mates with the first insertion part. The other side of the angled seat away from the swing arm is inclined to the swing surface. The mounting base is mounted on the inclined side of the angled seat, and the mounting base has a limiting groove, with the second limiting post passing through the limiting groove.

[0008] Furthermore, the motor has two output shafts symmetrically arranged on the left and right sides, and the two output shafts are coaxially arranged. The inside of the housing is provided with second cavities that are connected to the first cavity on the left and right sides respectively, and each second cavity is provided with the transmission component. The outside of the housing is provided with the massage drive component corresponding to each transmission component position. The two output shafts are respectively connected to their respective transmission components. The transmission components and massage drive components on both sides are symmetrically distributed with the overall central axis as the axis of symmetry.

[0009] Furthermore, the transmission gear includes an integrally formed helical gear and a spur gear arranged coaxially. The helical gear is connected to the output shaft of the motor, and the spur gear is connected to the drive gear.

[0010] Furthermore, the first protrusion has a circular cross-sectional shape in the radial direction, the first protrusion and the drive gear are integrally formed, the outer contour of the movable piece is square, and a circular hole adapted to the first protrusion is provided in the center of the movable piece, and the movable piece is sleeved on the first protrusion through the circular hole.

[0011] Furthermore, the second through groove is rectangular in shape, and the shorter side length of the rectangle corresponding to the second through groove is adapted to the side length of the square corresponding to the movable piece. The cross-sectional shape of the second protrusion in the radial direction is circular, and the second protrusion and the upper shell are integrally formed.

[0012] Furthermore, the second limiting post is perpendicular to the surface of the swing arm, and the second limiting post extends away from the upper shell.

[0013] Furthermore, the angle formed between the side of the angled seat away from the swing arm and the swing surface is an acute angle. A first mounting part is provided on the side of the angled seat away from the swing arm. The mounting seat is provided with an assembly groove, a limiting groove and a mounting groove. A slant plate is embedded in the assembly groove. A second mounting part that cooperates with the first mounting part is provided on the side of the slant plate facing the angled seat. The mounting seat is installed on the angled seat through the cooperation of the first mounting part and the second mounting part.

[0014] Furthermore, the massage drive assembly also includes a massage element and a torsion spring. The mounting base is provided with a hinge for swing-connecting with the massage element. The torsion spring is located between the massage element and the mounting base, and both ends of the torsion spring are fixedly connected to the massage element and the mounting base, respectively.

[0015] Furthermore, the massage drive assembly also includes a massage element and a compression spring. One end of the massage element is provided with a first massage head that is fixedly connected, and the other end of the massage element is connected to a second massage head through the compression spring.

[0016] Furthermore, the other end of the massage component is provided with a mounting platform, the mounting platform is provided with a positioning post, the compression spring is sleeved on the positioning post, the height of the positioning post is less than half the height of the compression spring in the free state, and the second massage head is sleeve-shaped and sleeved on the outside of the compression spring.

[0017] Compared with the prior art, this utility model has the following advantages: This utility model provides a push-knead massage structure that, through the cooperation of an eccentrically positioned first protrusion and a movable plate, converts the unidirectional rotational motion output by the motor into eccentric rotational motion. The swing arm then converts the eccentric rotation into planar oscillation, and finally, the inclined guide of the angled seat converts the planar oscillation into a combined push-kneading motion of the massage head. This achieves a massage effect combining "push" and "knead," more effectively simulating manual push-kneading techniques compared to traditional single rotation or single tapping massage methods, thus improving massage comfort and user experience. The movable plate, fitted onto the first protrusion, and the second through groove fitted onto the outside of the movable plate, create a surface-to-line contact transmission between the movable plate and the swing arm. This effectively avoids the defects of localized stress concentration and easy wear in traditional point-contact transmission methods, significantly extending the product's service life. The various transmission components are positioned and transmitted through a fitted and threaded manner, requiring no additional fasteners. The structure is compact, easy to assemble, and conducive to product miniaturization. The first protrusion extends outward through the first through slot of the upper shell, allowing the eccentric drive source to be directly exposed on the outside of the upper shell. This facilitates the direct mounting of components such as movable plates, simplifies the transmission path, reduces energy loss in intermediate transmission links, and improves transmission efficiency. Attached Figure Description

[0018] Figure 1 This is a first-view structural schematic diagram of a kneading massage structure according to this embodiment; Figure 2 This is a second-view structural schematic diagram of a kneading massage structure according to this embodiment; Figure 3 yes Figure 1 The main view; Figure 4 yes Figure 1 Top view; Figure 5 yes Figure 1 Side view; Figure 6 This is a partial exploded view from a first perspective of a kneading massage structure according to this embodiment; Figure 7 This is a partial exploded view from a second perspective of a kneading massage structure according to this embodiment; Figure 8 This is a partial exploded view of a massage drive component of a kneading massage structure according to this embodiment; Figure 9 This is a schematic diagram of the transmission component of a kneading massage structure (with the upper shell removed) according to this embodiment; Figure 10 This is a first-view structural schematic diagram of the transmission component of a kneading massage structure (without the upper and lower shells) according to this embodiment. Figure 11This is a second-view structural schematic diagram of the transmission component of a kneading massage structure (without the upper and lower shells) according to this embodiment; Figure 12 This is a first-view structural schematic diagram of the drive gear of a kneading massage structure according to this embodiment; Figure 13 This is a second-view structural schematic diagram of the drive gear of a kneading massage structure in this embodiment; Figure 14 This is a schematic diagram of a portion of the drive gear of a kneading massage structure in this embodiment; Figure 15 This is a schematic diagram of another part of the drive gear of a kneading massage structure in this embodiment; Label Explanation: 1. Housing; 11. Upper housing; 111. First through groove; 112. Second protrusion; 12. Lower housing; 2. Motor; 21. Output shaft; 3. Transmission assembly; 31. Transmission gear; 311. Helical gear; 312. Spur gear; 32. Drive gear; 321. First protrusion; 3211. First insertion part; 322. Positioning groove; 323. Arc-shaped limiting groove; 324. Positioning post; 325. First limiting post; 4. Massage drive assembly; 41. Movable plate; 411. Through hole; 42. Swing arm; 421. Second through groove; 422. Sleeve hole; 423. Second limiting post; 43. Angled seat; 431. Second insertion part; 432. First mounting part; 44. Mounting base; 441. Limiting groove; 442. Assembly groove; 443. Mounting groove; 45. Inclined plate pressure plate; 451. Second mounting part; 46. Massage component; 461. First massage head; 462. Second massage head; 47. Torsion spring; 48. Compression spring. Detailed Implementation

[0019] The specific embodiments of this utility model will be clearly and completely described below with reference to the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0020] In the description of this utility model, the terms "center," "left and right," "upper," "lower," "inner," "outer," "axial," and "radial," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or quantity.

[0021] In the description of this utility model, "integral molding" refers to two or more components forming an inseparable integral structure through casting, injection molding, forging, or machining, without the need for subsequent connection processes such as welding, bonding, or threaded connections. "Transmission connection" refers to a connection relationship between two components that can transmit power (torque or force), including but not limited to gear meshing, sleeve fit, and hinge fit. "Eccentric setting" refers to a component whose geometric center axis does not coincide with its rotation axis, exhibiting a certain eccentricity. "Sleeve fitting" refers to a component being installed externally or internally on another component in a sleeve manner, forming a clearance fit or transition fit relationship, allowing for relative rotation or relative sliding.

[0022] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] See Figures 1 to 11 As shown in the figure, this embodiment provides a kneading massage structure, including a housing 1. The housing 1 is a hollow shell structure formed by an upper shell 11 and a lower shell 12 that are fitted together. The upper shell 11 and the lower shell 12 can be fixedly fitted together by means of snap-fit ​​connection, screw connection, or ultrasonic welding to form a closed internal space. The housing 1 is made of plastic material through injection molding, which has the advantages of light weight and low cost while ensuring structural strength.

[0024] The housing 1 has a first cavity located in the center for housing the motor 2. The shape and size of the first cavity are adapted to the shape of the motor 2 for positioning and accommodating it. The housing 1 also has a second cavity located to one side of and connected to the first cavity for housing the transmission assembly 3. The first and second cavities are partially separated by a partition, leaving only a passage for the output shaft 21 of the motor 2 to pass through, ensuring the relative positional accuracy between the motor 2 and the transmission assembly 3.

[0025] The first cavity contains a motor 2. The motor 2 is a miniature DC geared motor or a stepper motor, which has at least one output shaft 21. The motor 2 can be fixedly mounted to the inner wall of the upper shell 11 or the lower shell 12 by screws, or it can be fixed to the first cavity by clips or pressure plates.

[0026] The second cavity is equipped with a transmission assembly 3. The transmission assembly 3 is used to receive the rotational power of the motor 2 and transmit it to the massage drive assembly 4. The transmission assembly 3 includes a transmission gear 31 and a drive gear 32.

[0027] The transmission gear 31 has a stepped gear structure and is connected to the output shaft 21 of the motor 2. Specifically, the transmission gear 31 can be mounted on the inner wall of the lower housing 12 via a rotating shaft. The tooth profile of the transmission gear 31 can be helical, spur, or herringbone, etc., preferably helical to improve transmission smoothness.

[0028] The drive gear 32 meshes with the transmission gear 31, forming a gear pair to achieve speed reduction, torque increase, and power reversal. The tooth ratio of the drive gear 32 to the transmission gear 31 can be rationally configured according to the required massage frequency and torque. Typically, the drive gear 32 has more teeth than the transmission gear 31 to achieve speed reduction and torque increase, allowing the drive gear 32 to obtain a lower speed and higher torque, thereby providing sufficient massage driving force.

[0029] The drive gear 32 has an eccentrically positioned first protrusion 321 on one end face facing the upper housing 11. The first protrusion 321 protrudes from the end face of the drive gear 32, with its protrusion direction facing the upper housing 11. There is a certain eccentricity between the geometric center axis of the first protrusion 321 and the rotation axis of the drive gear 32. The magnitude of this eccentricity determines the oscillation amplitude of the massage head. A larger eccentricity results in a larger oscillation amplitude of the massage head, and a greater kneading force and range; conversely, a smaller eccentricity results in a smaller amplitude. Depending on different massage needs, the eccentricity can be selected between 2mm and 10mm.

[0030] The upper shell 11 is provided with a first through groove 111 for the first protrusion 321 to protrude to its outside. The first through groove 111 is a through hole that penetrates the wall thickness of the upper shell 11, and its shape and size are larger than the outer diameter of the first protrusion 321, so as to ensure that the first protrusion 321 will not interfere with the upper shell 11 when it rotates with the drive gear 32.

[0031] The first protrusion 321 extends to the outer surface of the upper shell 11 and has a first insertion portion 3211. The first insertion portion 3211 is used to engage with the second insertion portion 431 on the angled seat 43 to transmit power from the first protrusion 321 to the angled seat 43. The first insertion portion 3211 has a non-circular structure to ensure that the second insertion portion 431, which it engages with, can transmit torque without relative rotation after insertion.

[0032] A massage drive assembly 4 is provided on the outside of the housing 1 at the position corresponding to the transmission assembly 3. The massage drive assembly 4 is used to receive power from the transmission assembly 3 and convert it into the kneading motion of the massage head.

[0033] The massage drive assembly 4 includes a movable plate 41, a swing arm 42, an angled seat 43, and a mounting base 44.

[0034] The movable piece 41 is a sheet-like component that is fitted onto the first protrusion 321. Specifically, the movable piece 41 has a through hole 411 in the middle, through which the first protrusion 321 passes, allowing the movable piece 41 to rotate or slide relative to the first protrusion 321.

[0035] The swing arm 42 is a long, strip-shaped plate-like component, which is positioned above the upper shell 11. A second through groove 421 is provided in the middle of the swing arm 42, which is a slot that penetrates the thickness direction of the swing arm 42. The second through groove 421 is fitted onto the outside of the movable piece 41, that is, the movable piece 41 is entirely located within the outline of the second through groove 421.

[0036] A second protrusion 112 is provided on the outer surface of the side wall of the upper shell 11. The second protrusion 112 protrudes outward from the outer surface of the side wall of the upper shell 11, and its protrusion direction is perpendicular to the side wall of the upper shell 11. The second protrusion 112 is located at one end of the swing arm 42 with the sleeve hole 422, and serves as the fulcrum for the swing of the swing arm 42.

[0037] One end of the swing arm 42 is provided with a sleeve hole 422, which is a circular hole. The sleeve hole 422 is fitted onto the second protrusion 112, so that the swing arm 42 can swing around the second protrusion 112 as a fulcrum. The other end of the swing arm 42 is provided with a second limiting post 423. The second limiting post 423 is a columnar structure that protrudes from the surface of the swing arm 42.

[0038] An angled seat 43 is positioned above the swing arm 42. The side of the angled seat 43 facing the swing arm 42 is parallel to the swing surface formed by the swinging of the swing arm 42. A second insertion part 431 is provided on the side of the angled seat 43 facing the swing arm 42. The second insertion part 431 cooperates with the first insertion part 3211 to achieve a transmission connection between the angled seat 43 and the first protrusion 321. The side of the angled seat 43 facing away from the swing arm 42 is inclined to the swing surface.

[0039] Mounting base 44 is mounted on the inclined side of angled base 43. Mounting base 44 is provided with limiting groove 441, and second limiting post 423 passes through the limiting groove 441 to realize relative position constraint and guidance between swing arm 42 and mounting base 44.

[0040] In this embodiment, after the motor 2 starts, the output shaft 21 of the motor 2 drives the transmission gear 31 to rotate, and the transmission gear 31 drives the drive gear 32 to rotate. Since the first protrusion 321 on the drive gear 32 is eccentrically positioned, the first protrusion 321 moves in a circular trajectory as it rotates with the drive gear 32. Driven by this eccentric motion, and constrained by the second through groove 421, the movable piece 41 fitted on the first protrusion 321 drives the swing arm 42 to reciprocate around the second protrusion 112 as a fulcrum. The reciprocating swing of the swing arm 42 is transmitted to the mounting base 44 through the second limiting post 423, and then guided by the inclined surface of the angled seat 43, ultimately driving the massage piece 46 mounted on the mounting base 44 to perform a compound kneading action that includes both pushing and rubbing components.

[0041] Based on the above technical solution, the engagement of the movable piece 41 fitted onto the first protrusion 321 and the second through groove 421 fitted onto the outside of the movable piece 41 creates a surface-to-line contact transmission between the movable piece 41 and the swing arm 42. This effectively avoids the defects of local stress concentration and easy wear in traditional point contact transmission methods, significantly extending the product's service life. Positioning and transmission between the various transmission components are achieved through fitting and passing, eliminating the need for additional fasteners. This results in a compact structure, convenient assembly, and facilitates miniaturization design. The first protrusion 321 extends outward through the first through groove 111 of the upper shell 11, directly exposing the eccentric drive source to the outside of the upper shell 11. This facilitates the direct fitting and installation of components such as the movable piece 41, simplifies the transmission path, reduces energy loss in intermediate transmission links, and improves transmission efficiency. Through the cooperation of the eccentric drive and the inclined guide of the angled seat 43, the rotational motion of the motor 2 is converted into a combined pushing and kneading action, simulating manual kneading techniques and enhancing the massage effect.

[0042] Based on the above embodiment, the motor 2 has two output shafts 21 arranged symmetrically on the left and right sides, and the two output shafts 21 are coaxially arranged. That is, output shafts 21 extend from both ends of the motor 2, and the two output shafts 21 are located on the same straight line and rotate in the same direction (both clockwise or both counterclockwise). This type of dual-output shaft motor is a standard motor type known in the art, in which the two ends of the internal rotor shaft extend from both ends of the motor housing to form two output ends.

[0043] Inside the housing 1, on the left and right sides opposite to the first cavity, are two second cavities that communicate with the first cavity. That is, the first cavity is located in the middle, and the two second cavities are located on the left and right sides of the first cavity, respectively, and each is connected to the first cavity. Each second cavity contains a transmission assembly 3. On the outside of the housing 1, corresponding to each transmission assembly 3, is a massage drive assembly 4. Two output shafts 21 are respectively connected to their corresponding transmission assemblies 3; that is, the first output shaft 21 is connected to the left-side transmission assembly 3, and the second output shaft 21 is connected to the right-side transmission assembly 3.

[0044] The transmission components 3 and massage drive components 4 on both sides are symmetrically distributed with the overall central axis as the axis of symmetry. That is to say, the transmission component 3 on the left side is structurally identical to the transmission component 3 on the right side, and the massage drive component 4 on the left side is identical to the massage drive component 4 on the right side, and they are arranged in mirror symmetry with the longitudinal central axis (i.e., the left-right axis of symmetry) of the housing 1 as the axis of symmetry.

[0045] Based on the above technical solution, the massage drive components 4 on both sides are driven simultaneously by the dual output shafts of a single motor, achieving synchronous movement of the massage elements on both sides and ensuring consistency and coordination of the massage actions on both sides. The transmission components 3 and massage drive components 4 on both sides are symmetrically distributed about the overall central axis, so that the center of gravity of the whole machine is located in the central position, resulting in low vibration and smooth operation during operation. Only one motor is needed to achieve dual-side drive, which reduces costs and overall weight compared to a solution using two independent motors.

[0046] Based on the above embodiments, the transmission gear 31 includes an integrally formed helical gear 311 and a spur gear 312 arranged coaxially. That is, the transmission gear 31 is a stepped gear, with helical and spur tooth sections respectively provided at different positions in its axial direction, and the two are connected as a whole by the gear body. The helical gear 311 and the spur gear 312 have a common axis of rotation.

[0047] The helical gear 311 is connected to the output shaft 21 of the motor 2 for transmission. Specifically, the tooth surface of the helical gear 311 is a helical surface, which meshes with the helical tooth section or worm section on the output shaft 21.

[0048] The spur gear 312 is connected to the drive gear 32 for transmission. The tooth surface of the spur gear 312 is a straight tooth surface, which meshes with the tooth surface of the drive gear 32. Since the helical gear 311 and the spur gear 312 are coaxially arranged and integrally formed, they have the same rotational speed and direction of rotation.

[0049] Based on the above technical solution, the helical gear 311 and the output shaft 21 of the motor 2 adopt helical gear meshing transmission, which has the advantages of smooth transmission, strong load-bearing capacity, and low noise. The spur gear 312 and the drive gear 32 adopt spur gear meshing transmission, with precise transmission ratio and no axial force component, ensuring that the drive gear 32 and its first protrusion 321 have stable speed and phase during eccentric rotation. The helical gear 311 and the spur gear 312 are integrally formed and coaxially arranged, eliminating the need for additional connecting parts, reducing the number of parts, simplifying the assembly process, and ensuring coaxiality.

[0050] Based on the above embodiment, the first protrusion 321 has a circular cross-sectional shape in the radial direction. That is, the outer contour of the first protrusion 321 is cylindrical, and any cross-section perpendicular to the axial direction is circular.

[0051] The first protrusion 321 and the drive gear 32 are integrally formed. During the manufacturing process, the drive gear 32 and the first protrusion 321 are formed into a whole by injection molding or machining in one step, and there is no connecting seam or assembly gap between the two.

[0052] The outer contour of the movable piece 41 is square. That is, the overall shape of the movable piece 41 is square or rectangular. The four sides of the movable piece 41 are straight, and rounded corners can be provided between adjacent sides to eliminate stress concentration.

[0053] The movable piece 41 has a circular hole at its center that matches the first protrusion 321. This circular hole is the aforementioned through hole 411. The diameter of this circular hole is slightly larger than the outer diameter of the first protrusion 321, forming a clearance fit between them. The movable piece 41 is fitted onto the first protrusion 321 through this circular hole, allowing the movable piece 41 to rotate freely in the circumferential direction relative to the first protrusion 321.

[0054] Based on the above technical solution, the first protrusion 321 has a circular cross-section, and the movable piece 41 has a matching circular hole in the center, ensuring that the movable piece 41 can rotate smoothly around the first protrusion 321. The first protrusion 321 and the drive gear 32 are integrally formed, ensuring the accuracy and long-term stability of the eccentricity. The outer contour of the movable piece 41 is square, providing the basic conditions for line contact with the rectangular second through slot 421 on the swing arm 42.

[0055] Based on the above embodiment, the second through groove 421 is rectangular in shape. That is, the second through groove 421 is rectangular in shape within the plane of the swing arm 42, having two opposite long sides and two opposite short sides.

[0056] The shorter side of the rectangle corresponding to the second through groove 421 is matched with the side length of the square corresponding to the movable piece 41. Specifically, the width of the shorter side of the second through groove 421 is slightly larger than the side length of the square of the movable piece 41, forming a gap fit between them, so that the movable piece 41 can slide back and forth in the direction of the shorter side in the second through groove 421, while the straight edge of the movable piece 41 and the long side of the second through groove 421 form a line-to-line contact fit.

[0057] The second protrusion 112 has a circular cross-sectional shape in the radial direction. That is, the outer contour of the second protrusion 112 is cylindrical.

[0058] The second protrusion 112 and the upper shell 11 are integrally formed. During the manufacturing process, the upper shell 11 and the second protrusion 112 are injection molded into a single unit, and there is no connecting seam or assembly gap between them.

[0059] Based on the above technical solution, the second through groove 421 is rectangular, and its short side length matches the square side length of the movable piece 41. This allows the square side of the movable piece 41 to form a surface-to-line contact fit with the short side of the rectangle of the second through groove 421 after the movable piece 41 is fitted into the second through groove 421. When the first protrusion 321 drives the movable piece 41 to make an eccentric movement, the movable piece 41 slides back and forth along the short side direction in the second through groove 421, transforming the traditional point contact transmission method into a line-to-line contact transmission, significantly increasing the contact area and reducing contact stress, thereby effectively reducing wear. The second protrusion 112 has a circular cross-section, allowing the swing arm 42 to swing smoothly. The second protrusion 112 and the upper shell 11 are integrally formed, ensuring connection strength and positional accuracy.

[0060] Based on the above embodiment, the second limiting post 423 is perpendicular to the surface of the swing arm 42. That is, the angle between the axis of the second limiting post 423 and the upper or lower surface of the swing arm 42 is 90 degrees.

[0061] The second limiting post 423 extends away from the upper shell 11. That is, the second limiting post 423 protrudes upward from the surface of the upper swing arm 42 above the upper shell 11, and its extension direction is away from the lower part of the upper shell 11.

[0062] Based on the above technical solution, the second limiting post 423 extends perpendicularly to the surface of the swing arm 42, ensuring that when the second limiting post 423 passes through the limiting groove 441 of the mounting base 44, its axial direction is consistent with the guiding direction of the limiting groove 441, thus ensuring that the second limiting post 423 can be smoothly inserted into the limiting groove 441. The second limiting post 423 extends away from the upper shell 11, facilitating alignment and insertion with the limiting groove 441 of the mounting base 44 located above during assembly, while ensuring that the second limiting post 423 has sufficient guiding length within the limiting groove 441 to prevent it from coming out during movement.

[0063] Based on the above embodiment, the angle formed between the side of the inclined seat 43 facing away from the swing arm 42 and the swing surface is an acute angle. That is, the angle between the inclined surface of the inclined seat 43 and the horizontal plane is an acute angle, and the degree of this acute angle determines the ratio of the pushing component to the kneading component in the kneading action. When the angle is closer to 0 degrees, the kneading component is larger and the pushing component is smaller; when the angle is closer to 90 degrees, the pushing component is larger and the kneading component is smaller. Preferably, the degree of this acute angle is between 15 degrees and 45 degrees.

[0064] The angled seat 43 has a first mounting part 432 on the side facing away from the swing arm 42. The first mounting part 432 is used to fix the mounting base 44 onto the angled seat 43, and it can be in the form of a protrusion, a groove, a snap, a threaded hole or a positioning post.

[0065] The mounting base 44 is provided with an assembly groove 442, a limiting groove 441, and a mounting groove 443. The assembly groove 442 is used to accommodate and embed the inclined plate pressure plate 45. The limiting groove 441 is a strip-shaped groove or an oblong groove, the width of which is adapted to the outer diameter of the second limiting post 423, and is used to guide the movement of the second limiting post 423. The mounting groove 443 is a recessed groove or a concave cavity structure.

[0066] An inclined plate pressure plate 45 is embedded in the assembly groove 442. The inclined plate pressure plate 45 is a plate-shaped component whose shape is adapted to the assembly groove 442. On the side of the inclined plate pressure plate 45 facing the inclined seat 43, there is a second mounting part 451 that mates with the first mounting part 432. The second mounting part 451 corresponds to the first mounting part 432, and the two form a concave-convex fit or a snap-fit ​​fit.

[0067] Mounting base 44 is mounted on angled base 43 through the cooperation of first mounting part 432 and second mounting part 451. Specifically, swashplate 45 is first fixed by the cooperation of second mounting part 451 and first mounting part 432 of angled base 43, and then mounting base 44 is sleeved on the outside of swashplate 45 through assembly groove 442, so that swashplate 45 is clamped and fixed in assembly groove 442, thereby realizing the fixed connection between mounting base 44 and angled base 43.

[0068] Based on the above technical solution, the angle between the inclined surface and the swing surface of the angled seat 43 is an acute angle, so that the original swing trajectory in the horizontal plane generates a pushing and kneading action with an inclined component after being guided by the inclined surface. Through the cooperation of the first mounting part 432 and the second mounting part 451 and the embedding and fixing of the inclined plate pressure plate 45, a detachable and fastened connection between the mounting base 44 and the angled seat 43 is realized. The assembly groove 442 serves to embed the inclined plate pressure plate 45, and the limiting groove 441 constrains and guides the movement trajectory of the second limiting post 423.

[0069] Based on the above embodiments, the massage drive assembly 4 also includes a massage element 46 and a torsion spring 47.

[0070] The mounting base 44 is provided with a hinge for swinging connection with the massage member 46. The hinge is a hinge seat, hinge shaft, or hinge hole structure, which allows the massage member 46 to swing relative to the mounting base 44 about the axis of the hinge. The axis of the hinge is perpendicular to or at an angle to the swing direction of the swing arm 42.

[0071] A torsion spring 47 is disposed between the massage element 46 and the mounting base 44. The torsion spring 47 is a helical torsion spring with two protruding ends. Both ends of the torsion spring 47 are fixedly connected to the massage element 46 and the mounting base 44, respectively. Specifically, one end of the torsion spring 47 is fixed in a fixing hole or groove provided on the massage element 46, and the other end is fixed in a fixing hole or groove provided on the mounting base 44. The helical body of the torsion spring 47 is located in the gap between the massage element 46 and the mounting base 44. When the massage element 46 swings relative to the mounting base 44, the torsion spring 47 is torn and generates an elastic restoring force.

[0072] Based on the above technical solution, the massage element 46 is sway-connected to the mounting base 44 via a hinge, allowing the massage element 46 to adjust its angle according to the shape of the human body surface. The two ends of the torsion spring 47 are fixedly connected to the massage element 46 and the mounting base 44 respectively, so that the massage element 46 can automatically return to its original position after swaying by relying on the elastic restoring force of the torsion spring 47, ensuring that the massage element 46 starts moving in the same posture in each massage cycle.

[0073] Based on the above embodiments, the massage drive assembly 4 also includes a massage element 46 and a compression spring 48.

[0074] The massage component 46 is a long strip-shaped member, with a first massage head 461 fixedly connected to one end. The first massage head 461 is integrally formed with the end of the massage component 46 or fixedly connected by means of threaded connection, snap-fit, etc. The first massage head 461 is hemispherical, conical, or disc-shaped, and its material can be hard plastic or metal.

[0075] The other end of the massage element 46 is connected to the second massage head 462 via a compression spring 48. The compression spring 48 is a helical compression spring, positioned between the end of the massage element 46 and the second massage head 462. One end of the compression spring 48 abuts against the end face of the massage element 46, and the other end abuts against the inner wall of the second massage head 462. In other words, the second massage head 462 is located at the other end of the massage element 46, and is elastically connected to the massage element 46 via the compression spring 48. The second massage head 462 can elastically extend and retract relative to the massage element 46 in the axial direction.

[0076] Based on the above technical solution, a first massage head 461 is fixedly connected to one end of the massage component 46 to provide stable pressing and kneading force; the other end is connected to a second massage head 462 via a compression spring 48, giving the second massage head 462 a certain axial elastic buffering capacity. With the first massage head 461 and the second massage head 462 located at opposite ends of the same massage component 46, only one massage drive assembly 4 is needed to provide two massage experiences with different stiffnesses, enriching the diversity of massage techniques.

[0077] Based on the above embodiment, the other end of the massage member 46 is provided with a mounting surface. The mounting surface is a flat area on the end face of the other end of the massage member 46, which can be arranged perpendicularly or obliquely relative to the length direction of the massage member 46. The mounting surface provides a flat abutment surface for the compression spring 48.

[0078] The mounting platform is equipped with positioning posts. The positioning posts are cylindrical protrusions that rise upwards from the center of the mounting platform, and their axis is consistent with the axis of the compression spring 48.

[0079] A compression spring 48 is fitted onto a positioning post. Specifically, the lower end of the compression spring 48 is fitted around the outer circumference of the positioning post, and the positioning post penetrates the hollow interior area of ​​the compression spring 48. The outer diameter of the positioning post is slightly smaller than the inner diameter of the compression spring 48, creating a clearance fit between them. This allows the compression spring 48 to freely expand and contract along the axial direction of the positioning post without radial misalignment.

[0080] The height of the positioning post is less than half the height of the compression spring 48 in its free state. That is, the axial length of the positioning post does not exceed half the natural length of the compression spring 48. This ratio ensures that the compression spring 48 will not come into hard contact with the top of the positioning post when fully compressed, thus ensuring the effective compression stroke of the compression spring 48.

[0081] The second massage head 462 is sleeve-shaped and fitted over the outside of the compression spring 48. The second massage head 462 is a cylindrical shell with one open end and one closed end, with the open end facing the mounting surface and the closed end facing the part of the body to be massaged. The inner cavity of the second massage head 462 accommodates the compression spring 48 and the positioning post, and its open end is fitted around the outer periphery of the compression spring 48.

[0082] The outer surface of the closed end of the second massage head 462 is a massage working surface, and its shape can be hemispherical, conical, or disc-shaped. The material of the second massage head 462 is preferably soft plastic or rubber to improve massage comfort.

[0083] Based on the above technical solution, the positioning post on the mounting platform acts as a radial limiter and guide for the compression spring 48, preventing the compression spring 48 from radially deviating or dislodging during operation. The height of the positioning post is less than half the height of the compression spring 48 in its free state, ensuring that the compression spring 48 has sufficient compression stroke. The second massage head 462 is sleeved on the outside of the compression spring 48, providing peripheral protection for the compression spring 48 and further radially limiting the spring. At the same time, the sleeve structure allows the second massage head 462 to have a larger contact area with the human body and a more uniform pressure distribution.

[0084] like Figures 12 to 15 As shown, in this embodiment, the structures of the drive gears 32 in the two transmission components 3 are different. One of the drive gears 32 can be a split structure or an integral structure. That is, when a split structure is adopted, the component with the first protrusion 321 is assembled with the drive gear 32, and the two remain synchronized when rotating axially without phase difference. If an integral structure is adopted, the effect of synchronous rotation can also be achieved. However, the other drive gear 32 must adopt a split structure. The component with the first protrusion 321 is assembled with the drive gear 32. The assembly surface of the drive gear 32 is provided with a positioning groove 322 located at the axis and an arc-shaped limiting groove 323 distributed around the axis. The assembly surface of the component with the first protrusion 321 is provided with a positioning post 324 located at the axis and a first limiting post 325 located at the corresponding arc-shaped limiting groove. When the two are assembled, the positioning post 324 is embedded in the positioning groove 322 and the two can rotate relative to each other. At the same time, the first limiting post 325 is embedded in the arc-shaped limiting groove 323 and moves within the arc-shaped limiting groove 323. The arc-shaped limiting groove 323 is used to limit the range of rotation between the two. In this solution, when the first limiting post 325 is located at both ends of the arc-shaped limiting groove 323, the corresponding rotation angle is 180°. During application, the transmission components on both sides can be set synchronously when the motor rotates forward, and when the motor rotates in reverse, the drive gear of the transmission component on one side directly drives the first protrusion to rotate half a turn, and the drive gear of the transmission component on the other side first idles half a turn before driving the first protrusion to rotate, thus entering synchronous rotation and realizing the switching between the two motion modes.

[0085] This utility model has been described with reference to the above-described embodiments and accompanying drawings. However, the above embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. On the contrary, modifications and equivalent provisions included in the spirit and scope of the claims are all included within the scope of this utility model.

Claims

1. A kneading massage structure, comprising a housing, wherein the housing is formed by an upper shell and a lower shell overlapping each other, characterized in that: The housing has a first cavity and a second cavity located on one side of the first cavity. The first cavity has a motor and the second cavity has a transmission assembly. The outer side of the housing has a massage drive assembly corresponding to the position of the transmission assembly. The transmission assembly includes a transmission gear and a drive gear. The transmission gear is connected to the output shaft of the motor and to the drive gear. The drive gear has an eccentrically positioned first protrusion on one end face facing the upper shell. The upper shell has a first through groove for the first protrusion to protrude to its outside. The end face of the first protrusion protruding to the outside of the upper shell has a first insertion part. The massage drive assembly includes a movable plate, a swing arm, an angled seat, and a mounting base. The movable plate is fitted onto the first protrusion. The swing arm has a second through groove in its middle, which is fitted onto the outside of the movable plate. The outer surface of the side wall of the upper shell has a second protrusion. One end of the swing arm has a sleeve hole fitted onto the second protrusion, and the other end of the swing arm has a second limiting post. One side of the angled seat facing the swing arm is parallel to the swing surface formed by the swing arm's swing, and this side has a second insertion part that mates with the first insertion part. The other side of the angled seat away from the swing arm is inclined to the swing surface. The mounting base is mounted on the inclined side of the angled seat, and the mounting base has a limiting groove, with the second limiting post passing through the limiting groove.

2. The kneading and massaging structure according to claim 1, characterized in that: The motor has two output shafts symmetrically arranged on the left and right sides, and the two output shafts are coaxially arranged. The inside of the housing is provided with second cavities that are connected to the first cavity on the left and right sides respectively. Each second cavity is provided with the transmission component. The outside of the housing is provided with the massage drive component corresponding to each transmission component. The two output shafts are respectively connected to their respective transmission components. The transmission components and massage drive components on both sides are symmetrically distributed with the overall central axis as the axis of symmetry.

3. The kneading and massaging structure according to claim 1, characterized in that: The transmission gear includes a helical gear and a spur gear that are integrally formed and coaxially arranged. The helical gear is driven by the output shaft of the motor, and the spur gear is driven by the drive gear.

4. The kneading and massaging structure according to claim 1, characterized in that: The first protrusion has a circular cross-sectional shape in the radial direction. The first protrusion and the drive gear are integrally formed. The outer contour of the movable piece is square. A circular hole adapted to the first protrusion is provided in the center of the movable piece. The movable piece is sleeved on the first protrusion through the circular hole.

5. The kneading and massaging structure according to claim 4, characterized in that: The second through groove is rectangular in shape, and the shorter side of the rectangle corresponding to the second through groove is adapted to the side length of the square corresponding to the movable piece. The cross-sectional shape of the second protrusion in the radial direction is circular, and the second protrusion and the upper shell are integrally formed.

6. The kneading and massaging structure according to claim 1, characterized in that: The second limiting post is perpendicular to the surface of the swing arm, and the second limiting post extends away from the upper shell.

7. The kneading and massaging structure according to claim 1, characterized in that: The angle between the side of the angled seat facing away from the swing arm and the swing surface is an acute angle. A first mounting part is provided on the side of the angled seat facing away from the swing arm. The mounting seat is provided with an assembly groove, a limiting groove and a mounting groove. A swashplate is embedded in the assembly groove. A second mounting part that cooperates with the first mounting part is provided on the side of the swashplate facing the angled seat. The mounting seat is installed on the angled seat through the cooperation of the first mounting part and the second mounting part.

8. The kneading massage structure according to claim 1, characterized in that: The massage drive assembly further includes a massage element and a torsion spring. The mounting base is provided with a hinge for swinging connection with the massage element. The torsion spring is located between the massage element and the mounting base, and both ends of the torsion spring are fixedly connected to the massage element and the mounting base, respectively.

9. The kneading and massaging structure according to claim 1, characterized in that: The massage drive assembly also includes a massage element and a compression spring. One end of the massage element is provided with a first massage head that is fixedly connected, and the other end of the massage element is connected to a second massage head through the compression spring.

10. The kneading massage structure according to claim 9, characterized in that: The other end of the massage component is provided with a mounting platform, and a positioning post is provided on the mounting platform. The compression spring is sleeved on the positioning post, and the height of the positioning post is less than half the height of the compression spring in the free state. The second massage head is sleeve-shaped and sleeved on the outside of the compression spring.

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