An expansion massage structure and a massage device

Abstract

Expansion massage structure, comprehensive: a drive element (1), wherein the drive element (1) is fixedly arranged; a number of push rods (2), wherein the drive element (1) is configured to drive each of the push rods (2) to rotate about its own axis, wherein the axes of rotation of each of the push rods (2) are parallel to each other and the number of push rods (2) is distributed about a central axis running parallel to the axes of rotation; and a positioning arrangement (5) comprising a fixedly arranged first positioning element (51), wherein all push rods (2) are rotatably guided through the first positioning element (51) in order to fix the relative position of the two ends of the push rods (2); characterized by the fact that the push rod (2) is a rod-shaped component in which at least a section of the rod body deviates from its own axis of rotation.

Description

TECHNICAL AREA

[0001] The present application relates to the technical field of physiotherapeutic massage devices, in particular an expansion massage structure and a massage device. BACKGROUND

[0002] Massage devices are already widely used to relieve muscle fatigue, promote blood circulation, and relax body and mind. Current state-of-the-art massage devices typically use linearly moving massage heads or airbag pressure structures to achieve massage functions.

[0003] However, such conventional massage structures have obvious shortcomings in simulating professional massage techniques such as deep kneading and pushing with the human hand. Specifically, linear reciprocating massage structures usually offer a single-direction press and release, with stiff movements and poor continuity, making it impossible to achieve smooth movement of the massage pressure point along the course of the muscle groups. While airbag press structures can provide surface pressure, their movements are delayed and the direction of pressure transmission is singular, making it difficult to accurately simulate the sensation of a spiraling thrust during a finger massage.

[0004] In summary, existing massage devices generally have problems, such as a singular and rigid massage mode, mechanical movements, and the lack of a continuous and fluid sliding sensation for the skin and deeper tissues, resulting in a poorer massage effect and requiring improvement in the user experience as well as the actual relaxation and relief effects.

[0005] The aim of the present application is to provide an expansion massage structure that can offer the user a more flexible massage experience, thereby improving the aforementioned problems, in light of the problems mentioned above.

[0006] The present application is implemented through the following technical solutions: In a first aspect, the present application provides an expansion massage structure, wherein the expansion massage structure includes a drive element, a number of push rods and a positioning arrangement comprising the drive element being fixedly arranged; wherein the drive element serves to drive each of the push rods to rotate about its own axis, wherein the axes of rotation of each of the push rods are parallel to each other and a number of push rods are distributed around a central axis running parallel to the axes of rotation; wherein the positioning arrangement comprises a fixedly arranged first positioning element, wherein all push rods are rotatably guided through the first positioning element to fix the relative position of the two ends of the push rods; wherein the push rod is a rod-shaped component, where at least a section of the rod body deviates from its own axis of rotation.

[0007] In the technical solutions of the embodiments of the present application, each push rod can be a helical rod body or a rod with a continuous helical projecting thread on its surface. When the push rod is driven to rotate about its own axis, the helical projection or protruding part of the push rod, due to its helical structure, will periodically and successively contact and press the user's skin. The radial pressing force generated on the skin by the helical design of the push rod or the helical projecting part on its surface during its rotation is not static, but shifts in a direction away from the central axis of the massage structure.This simulates the deep-penetrating, spiral kneading and massaging movements of the human thumb or knuckles on the muscles, with the force penetrating deeply and providing a clear sense of direction. The first positioning element is located near (or at) the end of the push rod furthest from the drive element, thus fixing the relative position of the two ends of the push rod along with the drive element. This ensures that the far end of the push rod does not wobble or jump when bearing human pressure and rotating, guaranteeing that the spiral projection or protruding portion always makes contact with the human body at the correct angle and in the correct position. This maintains the stability and precision of the massage movement, avoids noise or discomfort from structural wobble, and enhances the user experience.

[0008] Additional aspects and advantages of the present application are partly specified in the following description, partly will be obvious from the following description or will become apparent through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] To clarify the technical solutions of the embodiments of the present application, the figures required in these embodiments are briefly presented below. It is understood that the following figures only show some embodiments of the present application and are therefore not to be considered a limitation of the scope. A person skilled in the art in this field can obtain other relevant figures from these without any creative effort. Fig. Figure 1 is a schematic representation of the overall structure of the expansion massage structure according to some embodiments of the present application, where the push rod is a spiral rod body; Fig. Figure 2 is a schematic representation of the overall structure of the expansion massage structure according to some embodiments of the present application; Fig. Figure 3 is a schematic representation of the overall structure of the expansion massage structure according to further embodiments of the present application; Fig. 4 is a schematic partial representation of the expansion massage structure according to some embodiments of the present application; Fig. Figure 5 is a schematic representation of the overall structure of the expansion massage structure according to further embodiments of the present application; Fig. Figure 6 is a schematic representation of the structure of the transmission arrangement according to some embodiments of the present application; Fig. Figure 7 is a schematic representation of the structure of the push rod according to some embodiments of the present application; Fig. Figure 8 is a schematic representation of the structure of the transmission arrangement according to further embodiments of the present application; Fig. Figure 9 is a cross-sectional view of the expansion massage structure according to some embodiments of the present application, where the massage sleeve is arranged on the inside of the number of push rods; Fig. Figure 10 is a cross-sectional view of the expansion massage structure according to some embodiments of the present application, where the massage sleeve is arranged on the outside of the number of push rods; Fig. 11 is a schematic representation of the overall structure of the expansion massage structure according to some embodiments of the present application, when the push rods are arranged in two groups and parallel; Fig. Figure 12 is a schematic representation of the overall structure of the expansion massage structure according to some embodiments of the present application when the push rods are passed through the first positioning element; Fig. 13 is a schematic representation of the overall structure of the expansion massage structure according to some embodiments of the present application, when spirally protruding parts are formed on the surface of the push rod; Fig. Figure 14 is a schematic representation of the overall structure of the expansion massage structure according to further embodiments of the present application; Fig. Figure 15 is a schematic representation of the overall structure of the expansion massage structure according to some embodiments of the present application, where at least some of the push rods have a different pitch and a different outer diameter; Fig. Figure 16 is a schematic partial representation of the expansion massage structure according to further embodiments of the present application. Reference numerals: 1-drive element; 2-push rod; 20-spiral section; 21-straight section; 22-projecting part; 3-massage element; 4-transmission arrangement; 40-main gear; 41-auxiliary gear; 42-belt; 5-positioning arrangement; 50-second positioning element; 51-first positioning element; 52-third positioning element; 6-massage sleeve. DETAILED DESCRIPTION OF PREFERRED EXECUTION FORMS

[0010] The terms “first”, “second”, etc. in the description and claims of the present application or in the above-mentioned illustrations are used to distinguish different objects and not to describe a particular order or principal-subsidiary relationship.

[0011] The phrase “a number of” appearing in the present application refers to two or more (including two), similarly “several groups” refers to two or more groups (including two groups), and “several pieces” refers to two or more pieces (including two pieces).

[0012] According to some embodiments of the present application, optionally, as in Fig. 1, Fig. 2, Fig. 3 to Fig. 4, Fig. 12 to Fig. 13 and Fig. As shown in Figure 16, the present application provides an expansion massage structure. The expansion massage structure comprises a drive element 1, a number of push rods 2, and a positioning arrangement 5, wherein the drive element 1 is fixedly arranged; wherein the drive element 1 serves to drive each of the push rods 2 to rotate about its own axis, the axes of rotation of each of the push rods 2 being parallel to each other, and a number of push rods 2 being distributed about a central axis extending parallel to the axes of rotation; wherein the positioning arrangement 5 comprises a fixedly arranged first positioning element 51, wherein all push rods 2 are rotatably guided through the first positioning element 51 to fix the relative position of the two ends of the push rods 2; wherein the push rod 2 is a rod-shaped component in which at least a partial section of the rod body deviates from its own axis of rotation.

[0013] The distribution of the number of pushrods 2 around the central axis refers to the fact that the pushrods 2 are distributed in the peripheral regions of the central axis, which is a non-restrictive peripheral distribution. In several embodiments of the present application, the circular distribution of a number of pushrods 2 around the central axis is used as an example for description.

[0014] The push rod 2 can, without being limited to, be a spirally shaped rod body, or it can have spirally projecting parts 22 on its surface. In the present application, the push rod 2, either as a spirally shaped rod body or as a push rod 2 with spirally projecting parts 22 on its surface, is used as an example for description.

[0015] After the user switches on the massage device, the drive element 1 begins to operate. The drive element 1 synchronously drives a number of push rods 2 via gears or couplings, causing them to rotate around the central axis of the massage device. These push rods 2 are arranged uniformly around the central axis in the circumferential direction; for example, they can be distributed in a ring-shaped arrangement.

[0016] Each push rod 2 itself is a spiral rod body or a rod with a continuous spirally projecting thread on its surface. When the push rod 2 is driven to rotate about its own axis, the spiral projection or protruding part 22 of the push rod 2, due to its spiral structure, will periodically and successively contact and press the user's skin. The radial pressing force generated on the skin by the spiral design of the push rod or the spirally projecting part as it rotates is not static, but shifts in a direction away from the central axis of the massage structure. This simulates the deep-penetrating spiral kneading and massaging movements of the human thumb or knuckles on the muscles, with the force penetrating deeply and providing a clear sense of the direction of movement.The first positioning element 51 is located near (or at) the end of the push rod 2 furthest from the drive element 1, thus fixing the relative position of the two ends of the push rod 2 together with the drive element 1. This ensures that the far end of the push rod 2 does not jerk or jump when bearing human pressure and during rotation, thereby guaranteeing that the spiral projection or protruding part 22 can always contact the human body at the correct angle and in the correct position. This maintains the stability and precision of the massage movement, avoids noise or discomfort from structural wobble, and improves the user experience.

[0017] According to some embodiments of the present application, optionally, as in Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 to Fig. As shown in Figure 7, a number of massage elements 3 are distributed along the push rod 2 along its direction of extension; wherein the massage element 3 is a rolling ball which is rotatably mounted on the push rod 2.

[0018] The surface of massage element 3 facing the user's skin can be designed as a smooth spherical surface or made of an elastic, flexible material to increase comfort and avoid scratching the skin.

[0019] When in use, the massage element 3 can directly contact the user's massage area, or an elastic silicone massage sleeve 6 is placed on the surface of the massage structure, with the massage element 3 supporting the surface of the massage sleeve 6 so that it protrudes to form a massage head that can press the user's massage area.

[0020] At any given time, at least some massage elements 3 on the same rotating push rod 2 are simultaneously in contact with the skin, forming a continuous pressure area. With the continued rotation of the push rod 2, this pressure area moves smoothly and continuously along the direction of the central axis. This achieves a flexible movement of the pressure point along the course of the muscle groups.

[0021] When the drive element 1 starts and drives each push rod 2 to rotate around its own axis, the spiral structure of the rod body itself begins to work, generating a pressing force that moves in the axial direction of the rod body. Simultaneously, with the rotation of the push rod 2, the roller balls (massage elements 3) mounted on the rod body make contact with the user's skin and muscles. Since the roller balls are mounted so they can rotate, they naturally roll on the skin surface during the massage movement as they are pressed and compressed against the skin by the spiral movement of the push rod 2.

[0022] The introduction of rolling balls transforms the harsh pushing motion of the spiral wand into a soft kneading motion. The rolling action of the balls reduces friction and stiffness, making the massage process smoother and gentler. This is particularly beneficial for areas with thin skin and sensitive nerves, such as the neck and shoulders, thus enhancing comfort. During the rolling motion, the balls can target deep trigger points in the muscles more precisely. They possess both the penetrating force of pinpoint pressure and the diffusion sensation of a rolling knead. This combined stimulation can more effectively release muscle knots and stiffness deep within the muscles than a simple spiral pushing motion and promote local blood circulation. Conventional massage heads can easily generate frictional heat or even pull on the skin as they glide across it.The rotating roller balls convert sliding friction into rolling friction, reduce the coefficient of friction, prevent discomfort or burning of the skin from prolonged massage, and allow for a more lasting massage.

[0023] According to some embodiments of the present application, optionally, as in Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 to Fig. As shown in Figure 7, the massage element 3 is provided with a through-hole through which the push rod 2 is passed; wherein a number of massage elements 3 are attached to the push rod 2 and together cover the surface of the push rod 2.

[0024] The massage element 3 has a through-hole for the passage of the push rod 2, whereby this through-hole can run through the center of the massage element 3 or can be arranged differently from the center of the massage element 3.

[0025] The massage elements 3 are designed as individual, independent modules, for example, as spherical, ellipsoidal, or cylindrical massage rollers / balls, each with a through-hole. During assembly, a number of massage elements 3 are placed sequentially onto a push rod 2, like beads. These massage elements 3 are arranged closely together or spaced appropriately until they collectively cover the entire surface area of ​​the section of the push rod 2 intended for massage. When the drive element 1 rotates the push rod 2 about its axis, these massage elements 3, mounted on the rod, are carried along with it.

[0026] Each independent massage element 3 can generate a slight radial displacement or tilt under pressure, allowing the entire massage structure to dynamically adapt to the curves and irregularities of the human body surface (such as spinal crease, the area around the shoulder blades). This makes the distribution of the radial pressure force more even and avoids the problem of excessive pressure on bony prominences. The massage structure provided in the present application designs the massage elements 3 as attachable, independent components, which simplifies production, assembly, and maintenance. For example, massage elements 3 with different hardnesses (such as silicone, hard plastic) or different surface textures (smooth, studded) can be flexibly combined to meet the user's different intensity and tactile preferences, and a force gradient can even be achieved on a single push rod 2.

[0027] The massage element 3 mentioned in the present application can be designed as an exactly round sphere, ellipsoid, irregular body with local protrusions, tube bead or the like.

[0028] The massage element 3 is specifically designed as a roller ball. Each roller ball typically contains an internal bearing structure or uses a lining made of low-friction material, allowing it to be rotatably mounted on the push rod 2. A number of roller balls are arranged and mounted along the extension of the push rod 2. When the drive element 1 rotates the push rod 2 about its axis, the roller balls mounted on the rod are engaged. Because the roller balls are rotatable, when their protruding parts come into contact with the user's skin, they not only rotate with the rod but also perform a flexible rotation of their own under the influence of the frictional force of the skin surface.

[0029] Due to their spherical shape, the roller balls can perform a rolling motion upon contact with the skin. This rolling action reduces frictional resistance during the massage process, resulting in smooth and effortless axial movement of the pressure area and virtually eliminating any pulling on the skin (or the silicone massage sleeve 6), thus improving the smoothness and comfort of the massage. Each roller ball acts as an independent pressure point. They can adapt to subtle changes in body contours with minimal resistance, ensuring that the radial pressure force is applied more precisely and evenly to the target tissue. This avoids localized pressure concentrations or pressure blind spots caused by a rigid structure. As the pressure area formed by a number of roller balls moves axially, all contact points (roller balls) within it perform minute rolling movements and positional adjustments.This simulates the lively sensation of the fingertip or palm-to-finger joint rolling method used in a professional massage. The movement is no longer a purely mechanical displacement, but exhibits a lively and subtle invigorating effect, thus improving upon the aforementioned problems of mechanical movements and the lack of a continuous, fluid sensation in existing massage devices.

[0030] According to some embodiments of the present application, optionally, as in Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 to Fig. As shown in Figure 7, the surface of massage element 3 that comes into contact with the user's skin is a curved surface.

[0031] According to some embodiments of the present application, optionally, as in Fig. 2, Fig. 3 to Fig. As shown in Figure 4, in a projection plane perpendicular to the central axis, the distances from the centers of each of the push rods 2 to the central axis are equal.

[0032] The drive element 1 begins to operate and synchronously drives a number of pushrods 2 to rotate. The arrangement of these pushrods 2 fulfills a crucial geometric characteristic: In the projection plane perpendicular to the central axis of the device, the distance from the center point of each individual pushrod 2 (usually the center of its cross-section) to this central axis is perfectly equal. This means that all pushrods 2 are evenly distributed around a virtual circumference with the central axis as its center, forming a strictly symmetrical ring-shaped arrangement. When driven synchronously to rotate about their own axes, the massage elements 3 provided on their surfaces act sequentially on the skin.

[0033] Since the distances of each push rod 2 to the center are equal and the arrangement is symmetrical, the multiple pressure zones they create during rotation form a massage ring with balanced force and a symmetrical path on the skin. This ring-shaped pressure band moves along the direction of the central axis, providing the user with a stable, balanced massage experience, thus resolving issues of discomfort and lack of coordination that can be caused by one-sided or asymmetrical massages. The symmetrical arrangement ensures that the forces acting radially outward from the central axis are evenly distributed. Regardless of how the massage area moves, the radial pressure forces experienced by the skin and subcutaneous tissue from all sides are theoretically synchronous and symmetrical. This avoids muscle tension or deformation caused by uneven force application and enhances the relaxation effect.The evenly spaced, symmetrical arrangement of the push rods 2 ensures that the load on the drive element 1 (such as the motor and gears) is more balanced and that the inertial forces of the moving components are better compensated. This helps to reduce vibrations and noise of the entire machine, makes operation more stable and efficient, and simultaneously extends the service life of the drive components.

[0034] According to some embodiments of the present application, optionally, as in Fig. 2, Fig. 3 to Fig. As shown in Figure 4, the distance from the center of the push rod 2 to the central axis gradually increases or decreases along the direction of the central axis.

[0035] A number of push rods 2 are not arranged parallel to each other. Although they still satisfy the condition that in every cross-section perpendicular to the central axis the distances of their centers to the central axis are equal (i.e., circularly symmetrically distributed), this distance varies along the direction of said central axis. When the drive element 1 drives these push rods 2 synchronously with the rotation, the area of ​​the annular band of pressure zones formed by the massage elements 3 located on them varies synchronously with the axial movement.

[0036] This design allows the massage structure to adapt better to body parts with natural contours, such as the neck and waist, in three-dimensional space. The inclined arrangement of the push rods 2 ensures that the massage contact surface remains in continuous and uninterrupted contact with the skin from the near end to the far end. This eliminates the problem of potential lifting or pressure interruptions in the shoulder-neck transition area that can occur with a cylindrical arrangement, resulting in a seamless, enveloping massage from narrow to wide areas. As the pressure area moves along the central axis from one end to the other, the circumference of its effect increases or decreases synchronously.This simulates the natural transition of a masseur's palm from the neck down to the shoulder, with the contact area and force distribution changing with the body's contours, thus enhancing the flexibility and professional feel of the massage movement. As the distance between the push rods 2 gradually increases (narrow at the top and wide at the bottom), the linear speed of the massage elements 3 at their ends and the amplitude of the radial push against the skin can increase at the same angle of rotation, or different force sensations can be created due to leverage effects. This can provide the user with a progressive force experience from gentle to deep or from deep to soothing within a single axial massage stroke, with a stronger sense of rhythm.

[0037] According to some embodiments of the present application, optionally, as in Fig. As shown in Figure 14, the number of push rods 2 is divided into two groups, with the rotation directions of the two groups of push rods 2 being opposite.

[0038] Two groups of push rods 2 rotate in opposite directions. When these two groups of push rods 2 operate simultaneously, a bidirectional pushing and sliding effect is created at the user's massage site. One part of the spiral projections pushes skin and muscles upwards (or downwards), and another part pushes downwards (or upwards), forming a twisting motion similar to counter-rotating kneading with both hands on either side of the massage site.

[0039] The bidirectional pushing and sliding motion created by the opposing rotation of the two sets of push rods 2 simulates the technique of opposing kneading with both hands of a massage therapist. This technique can exert a more effective relaxation effect on deeper muscle tissue, making it particularly suitable for relieving areas that tend to stiffen easily. The push rods 2 rotating in one direction provide a single-directional pushing sensation, while the opposing rotation in the massage area creates a compound movement of opposing pressure. The user can feel the muscles being stretched and kneaded simultaneously in two directions, making the experience richer and more visceral.The opposing forces generated by the counter-rotation cause the massage points to be more concentrated in the target area, which can more effectively reach deep muscle tissue, relieve deep muscle knots and stiffness, and enhance the therapeutic effect of the massage. The two sets of push rods rotate in opposite directions, with the resulting reaction forces balancing each other within the structure. This reduces the tendency of the entire massage structure to twist in a particular direction during use, making the product more stable and also reducing the user's discomfort of having to actively counteract this twisting at the massage site.

[0040] According to some embodiments of the present application, optionally, as in Fig. As shown in Figure 14, the rotational speed of each of the pushrods 2 is different from that of at least some of the other pushrods 2.

[0041] Once the drive element 1 is started, each push rod 2 rotates about its own axis at a different rotational speed. Since each push rod 2 is a spiral rod body or has spirally projecting parts 22 on its surface, its rotational speed determines the speed at which the spiral projection or protruding part 22 moves along the rod body. A push rod 2 with a high rotational speed has a high sliding speed of the spiral projection or protruding part 22 and produces a rapid rolling pressure sensation on the skin. A push rod 2 with a low rotational speed has a slow sliding speed of the spiral projection or protruding part 22 and produces a slow, deep kneading sensation on the skin.These sliding movements at different speeds act simultaneously on the user's massage area, creating a massage experience that combines fast and slow work and is rich in layers.

[0042] During a massage with the human hand, the movement speeds of the five fingers are not perfectly synchronized; rather, each finger has its own function and they work together. The present embodiment simulates this characteristic of independent movements by differentiating the rotation speeds of each push rod 2, making the massage experience more natural and realistic. Different areas of the user have different massage requirements. Some muscles need relaxing relief, while others require deep pressure. By setting different rotation speeds for push rods 2 at different positions, multiple massage effects can be achieved simultaneously within the same product to meet the individual needs of the same user for different areas.A number of push rods rotate at different speeds, with the points at which their spiral projections or protruding parts reach the pressure point varying. This creates an offset and undulating massage rhythm on the user's skin. This variation in rhythm avoids the monotony of a massage with a uniform rhythm and makes the massage process more dynamic and engaging.

[0043] According to some embodiments of the present application, optionally, as in Fig. As shown in Figure 15, the slope and / or the outer diameter of each of the push rods 2 differs from that of at least one part of the other push rods 2.

[0044] Once the drive element 1 is started, each push rod 2 rotates around its own axis. Since the geometric parameters of each push rod 2 are different, the massage effects they produce also vary: In a push rod 2 with a small pitch, the spiral projections are closely spaced, creating a fine, continuous pressure sensation on the skin, similar to a quick rubbing with the fingers. In a push rod 2 with a large pitch, the spiral projections are sparsely spaced, creating a pressure sensation on the skin with longer intervals and a stronger impact, similar to pressing with the palm of the hand. In a push rod 2 with a small outer diameter, the spiral projections are flatter, acting on the superficial muscles and producing a gentle relaxation effect.With a push rod 2 featuring a large outer diameter, the spiral projections are deeper, acting on the deep muscles and creating a strong pressing effect. These differentiated massages, generated by various parameters, act simultaneously on the user's massage area, forming a multi-layered, multidimensional, composite massage experience.

[0045] According to some embodiments of the present application, optionally, as in Fig. 6 and Fig. As shown in Figure 8, it further comprises a transmission arrangement 4, wherein the drive element 1 drives the number of push rods 2 to rotation via the transmission arrangement 4; wherein the transmission arrangement 4 comprises a main gear 40 and a number of secondary gears 41; wherein the secondary gear 41 meshes with the main gear 40 or is in a transmission connection via a toothed belt 42; wherein the main gear 40 is connected to the output end of the drive element 1 and the secondary gear 41 is connected to the push rod 2.

[0046] The type of gear-gear transmission ensures that the rotational phase and speed of all pushrods 2 are highly synchronized. This allows the pressure areas formed on a number of pushrods 2 to move in unison along the central axis, producing a smooth and powerfully balanced massage waveform and avoiding problems of rhythmic confusion during the massage or mutual force interference due to lack of synchronization. Compared to direct gear meshing, the toothed belt 42, due to the elasticity of the belt material, can effectively absorb the vibrations and shocks generated by the gear meshing during power transmission and reduce transmission noise. This is particularly important for massage products used close to the ear and can provide the user with a quieter and more comfortable massage environment.

[0047] A main gear 40, which simultaneously drives a number of auxiliary gears 41 distributed around it, achieves the goal of efficiently driving multiple operating units (pushrods 2) with a single drive element 1 (motor). This central, star-shaped transmission layout is compact, saves space, and is suitable for integration into portable or handheld massage devices with stringent volume requirements, while maintaining high mechanical reliability of the gear transmission. Compared to belt 42 or friction wheel transmissions, where slippage or loosening can occur, the gear transmission has a defined transmission ratio, and the motion transmission is precise without rotational loss. Precise gear meshing can make the rotation of the pushrod 2 more stable, reduce vibrations and shock noise caused by transmission instabilities, and provide the user with a quieter massage environment.

[0048] According to some embodiments of the present application, optionally, as in Fig. 2, Fig. 3 to Fig. As shown in Figure 4, the positioning arrangement 5 further comprises a second positioning element 50 and a third positioning element 52; wherein the third positioning element 52 is connected between the first positioning element 51 and the second positioning element 50; wherein the two ends of the push rod 2 are each rotatably connected to the second positioning element 50 and the first positioning element 51; wherein the second positioning element 50 is fixedly connected to the drive element 1; and the third positioning element 52 is a rod-shaped structure whose axis coincides with the central axis.

[0049] In the actual assembly, all upper ends of the push rods 2 are rotatably connected to the second positioning element 50 (for example, an upper end plate or a holder), and their lower ends are also rotatably connected to the first positioning element 51 (such as a lower end plate or a holder). The second positioning element 50 is rigidly connected to the housing or frame of the drive element 1 (such as a motor) to ensure a stable drive source. The third positioning element 52 is a rod-shaped structure in the center of the assembly, both ends of which are rigidly connected to the second positioning element 50 and the first positioning element 51, respectively, with its own axis precisely aligned to coincide with the central axis of the entire massage structure.

[0050] The positioning arrangement 5, together with the third positioning element 52, whose axis coincides with the central axis, forms a stable spatial frame in combination with the second positioning element 50 and the first positioning element 51. The rotational axes of all push rods 2 are mounted and positioned based on this frame, which ensures their parallelism in space and the precision of the circular distribution, thereby guaranteeing the stability and coordination of the movement paths of multiple pressing areas.

[0051] The drive element 1 is attached to the second positioning element 50, while the push rods 2 are mounted on the second positioning element 50 and the first positioning element 51. This ensures that the vibrations and reaction forces of the drive element 1 are directly absorbed and distributed by the rigid positioning arrangement 5, thus preventing vibration of the entire machine or an increase in noise caused by a free suspension or unstable mounting of the drive element 1. This ensures that the force is transmitted stably and efficiently to each push rod 2.

[0052] According to some embodiments of the present application, optionally, as in Fig. As shown in Figure 7, the push rod 2 comprises a spiral section 20 and straight sections 21 located at both ends of this spiral section 20, wherein the massage element 3 is arranged on the spiral section 20; wherein the straight sections 21 extend in the direction of the central axis and are each connected to the second positioning element 50 and the first positioning element 51.

[0053] Each push rod 2 is designed as a segmented structure. Its central section is the spiral section 20, with a straight section 21 projecting from each of its two ends. This straight section 21 is a straight rod with a smooth surface and no spiral structure, its direction of extension being parallel to the central axis of the entire massage structure. During assembly, the straight section 21 at the upper end of the push rod 2 is guided through the bearing hole on the second positioning element 50 and rotatably connected to it, and the straight section 21 at the lower end is likewise guided through the bearing hole on the first positioning element 51 and connected to it. The force of the drive element 1 is coupled via the transmission arrangement 4 to a specific portion of the straight section 21, thereby driving the entire push rod 2 to rotate.

[0054] The clear division of the push rod 2 into a spiral section 20 (functional working area) and straight sections 21 (structural connection and transmission area) achieves a functional separation of the design. The straight sections 21 are specifically responsible for providing standardized, reliable bearing mounting surfaces and force input interfaces, making the transmission connection simpler and more precise. The spiral section 20, on the other hand, can focus on the optimized design of the massage waveform (spiral line) without having to consider assembly and transmission compatibility issues, allowing both parts to achieve optimal performance.

[0055] According to some embodiments of the present application, optionally, as in Fig. 9 to Fig. As shown in Figure 10, it further comprises a massage sleeve 6 with elasticity, wherein the massage sleeve 6 is arranged on the inside or outside of the number of push rods 2; wherein, when rotated, the push rod 2 presses the massage sleeve 6 to deform in order to press the skin of a user.

[0056] When the drive element 1 starts and drives each push rod 2 to rotate around its own axis, the push rod 2 (spiral rod body) begins to generate a spiral thrust motion. The rotating push rod 2 comes into contact with the inside or outside of the massage sleeve 6. Due to the spiral shape of the push rod 2, it will continuously push up different areas of the massage sleeve 6 during the rotation. The massage sleeve 6 deforms under the pressure of the push rod 2 – the pushed-up areas protrude outwards, forming a curved massage wave. These protruding areas press directly onto the user's skin. As the push rod 2 continues to rotate, the pushed-up area moves along the extension direction of the push rod 2, and the deformed area of ​​the massage sleeve 6 also moves, creating a continuous, flowing pressure sensation on the user's body.

[0057] After the spiral projection of the push rod 2 has passed a certain position, the massage sleeve 6 returns to its original shape at that position due to its own elasticity and leaves the skin surface. In this way, the massage sleeve 6 continuously repeats the process of being pushed upwards to press the skin and elastically returning to its original shape to leave the skin, thus creating an undulating massage rhythm.

[0058] The elastic massage sleeve 6 insulates the push rod 2 from the skin. The user contacts the soft and elastic surface of the massage sleeve 6 instead of the hard push rod 2, which improves massage comfort and avoids discomfort from direct pressure with hard objects. The elasticity of the massage sleeve 6 allows it to deform slightly when pushed upwards by the push rod 2, distributing the local pressure of the push rod 2 over a larger area. This results in more even massage pressure on the skin and muscles, preventing pressure concentration issues. The rotation of the push rod 2 is transmitted to the skin via the deformation of the massage sleeve 6. The elastic cushioning effect of the massage sleeve 6 transforms the initially mechanical movement of the push rod 2 into a smoother up-and-down motion, with a more natural and fluid transition between movements.The elasticity of the massage sleeve 6 allows it to automatically adapt its shape to the user's body curves, enabling it to better conform to different back contours of the users to ensure that all massage points receive effective pressure.

[0059] According to some embodiments of the present application, optionally, the longitudinal direction of the formed pressing area forms an angle with the axis of rotation of the push rod 2.

[0060] The angle between the pressing area and the axis of rotation mentioned in the present application is not independently controlled, but rather an inevitable result determined by the helical arrangement parameters (such as the helix angle) of the massage elements 3 on the push rod 2. After unwinding, the helix forms an angle with the axis, which is directly reflected in the contact line (i.e., the longitudinal direction of the pressing area) formed by the simultaneous contact of several massage elements 3 with the skin at any given time. Therefore, designing the helix parameters is equivalent to designing the inclination angle of the pressing area.

[0061] According to some embodiments of the present application, optionally, as in Fig.As shown in Figure 11, a number of push rods 2 are divided into two groups, wherein the push rods 2 within each group are arranged in intervals in a direction perpendicular to the central axis and the arrangement directions of the two groups of push rods 2 are parallel to each other.

[0062] Two groups of push rods 2 generate parallel sliding movements, creating two massage paths on the user's skin. This type of massage is particularly suitable for the synchronous relaxation of elongated muscle groups and simulates the effect of simultaneous pressing and pushing with both hands. Dividing the push rods 2 into two parallel groups allows for a more balanced and symmetrical distribution of massage force. This can prevent body twisting or discomfort caused by a one-sided massage. The design of the two parallel groups can be adapted to the shape of different massage areas.

[0063] According to some embodiments of the present application, optionally, the present application provides an expansion massage device comprising an expansion massage structure as described above and a battery, wherein the battery is electrically connected to the expansion massage structure and serves to provide power.

[0064] Although the present application has been described with reference to preferred embodiments, various improvements can be made to it and components thereof can be replaced by equivalents without deviating from the scope of the present application.

Claims

[1] Expansion massage structure, comprising: a drive element (1), wherein the drive element (1) is fixedly arranged; a number of push rods (2), wherein the drive element (1) is configured to drive each of the push rods (2) to rotate about its own axis, wherein the axes of rotation of each of the push rods (2) are parallel to each other and the number of push rods (2) is distributed about a central axis running parallel to the axes of rotation; and a positioning arrangement (5) comprising a fixedly arranged first positioning element (51), wherein all push rods (2) are rotatably guided through the first positioning element (51) in order to fix the relative position of the two ends of the push rods (2); characterized by , that the push rod (2) is a rod-shaped component in which at least a section of the rod body deviates from its own axis of rotation. [2] Expansion massage structure according to claim 1, characterized by , that a number of massage elements (3) are distributed along the extension direction of the push rod (2); wherein the massage element (3) is a rolling ball which is rotatably mounted on the push rod (2). [3] Expansion massage structure according to claim 2, characterized by , that the massage element (3) is provided with a through-hole through which the push rod (2) is passed; wherein a number of massage elements (3) are attached to the push rod (2) and together cover the surface of the push rod (2). [4] Expansion massage structure according to claim 1, characterized by , that in a projection plane perpendicular to the central axis the distances from the centers of each of the push rods (2) to the central axis are equal. [5] Expansion massage structure according to claim 4, characterized by, that along the direction of the central axis the distance from the center of the push rod (2) to the central axis gradually increases or decreases. [6] Expansion massage structure according to claim 1, characterized by , that the number of push rods (2) is divided into two groups, wherein the rotation directions of the two groups of push rods (2) are opposite. [7] Expansion massage structure according to claim 1, characterized by , that the rotational speed of each of the pushrods (2) is different from that of at least some of the other pushrods (2). [8] Expansion massage structure according to claim 1, characterized by , that the slope and / or the outer diameter of each of the push rods (2) differs from that of at least part of the other push rods (2). [9] Expansion massage structure according to claim 1, further comprising a transmission arrangement (4), wherein the drive element (1) drives the number of push rods (2) to rotation via the transmission arrangement (4); wherein the transmission arrangement (4) comprises a main gear (40) and a number of secondary gears (41); wherein the secondary gear (41) meshes with the main gear (40) or is in a transmission connection via a toothed belt (42); wherein the main gear (40) is connected to the output end of the drive element (1) and the secondary gear (41) is connected to the push rod (2). [10] Expansion massage structure according to claim 1, characterized by, that the positioning arrangement (5) further comprises a second positioning element (50) and a third positioning element (52); wherein the third positioning element (52) is connected between the first positioning element (51) and the second positioning element (50); wherein the two ends of the push rod (2) are each rotatably connected to the second positioning element (50) and the first positioning element (51); wherein the second positioning element (50) is fixedly connected to the drive element (1); and the third positioning element (52) is a rod-shaped structure whose axis coincides with the central axis. [11] Expansion massage structure according to claim 1, characterized by , further comprising a massage sleeve (6) with elasticity, wherein the massage sleeve (6) is arranged on the inside or outside of the number of push rods (2); wherein the push rod (2), when rotated, presses the massage sleeve (6) to deform in order to press the skin of a user. [12] Expansion massage structure according to claim 1, characterized by , that the number of push rods (2) is divided into two groups, wherein the push rods (2) within each group are arranged in intervals in a direction perpendicular to the central axis and the arrangement directions of the two groups of push rods (2) are parallel to each other. [13] Expansion massage device, characterized by , comprising: the expansion massage structure according to any one of claims 1 to 12; and a battery which is electrically connected to the expansion massage structure and serves to supply power.

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