Neck massage module of massage sofa

Abstract

This invention discloses a neck massage module for a massage sofa, comprising a base, a drive motor mounted on the base, a transmission assembly, and two symmetrically oriented lateral swinging structures. The transmission assembly is connected to the drive motor and drives the two lateral swinging structures to swing laterally. Each lateral swinging structure has a movable balance frame, on which two lateral massage rollers are mounted. When the two lateral massage rollers slide along the neck, the balance mechanism moves relative to the lateral swinging structures, ensuring that the pressure applied by the two lateral massage rollers to the neck remains the same. The beneficial effect of this invention is that by pressing from both sides of the neck towards the center through lateral swinging, the massage area coverage is large, and the pressing force can be balanced, resulting in a better massage effect.

Description

Technical Field

[0001] This invention relates to a neck massage module, and more particularly to a neck massage module for a massage sofa. Background Technology

[0002] As people pay more attention to health and wellness, massage sofas and massage chairs are gaining popularity, especially among those who spend long hours working at desks in offices, who are particularly interested in neck massage. Currently, there are two main types of neck massage available on massage sofas: mechanical and airbag-based. Mechanical massage uses rigid massage heads to apply pressure, kneading, and tapping motions to the neck. Airbag-based massage inflates the neck by compressing it.

[0003] For example, patent application CN108814919A discloses a full-range shoulder and neck massage chair. Referring to the specification of that patent application

[0022] and its appendices... Figure 3 The neck massage device 10 includes a neck massage support 1001, a neck massage roller 1002, a neck slider 1003, two neck connecting brackets 1004, two eccentric wheels 1005, and a neck massage drive motor 1006. The neck massage roller 1002 is installed in a slotted bearing in the neck massage support 1001, and the rear end of the neck massage support 1001 slides in the hole of the neck slider 1003. The two eccentric wheels 1005 are installed at both ends of the neck massage drive motor 1006. The front ends of the two neck connecting brackets 1004 are respectively installed on the rear shaft of the neck massage support 1001, and the rear ends are respectively installed on the eccentric shafts of the two eccentric wheels 1005. The neck massage support 1001 is designed in a semi-circular shape to completely wrap and massage the neck. The eccentric rotation of the two eccentric wheels 1005 driven by the neck massage drive motor 1006 realizes the forward, backward, up, and down movement of the neck massage support 1001. The neck massage device in this patent application is mechanical. First, if the driving force of the neck massage motor is inappropriate and the neck massage bracket completely covers the neck, it can cause a certain degree of suffocation, not only failing to achieve a good massage effect but also posing a danger to the user. Second, the specific massage method is achieved by the neck massage roller rolling along the neck to generate pressing and pushing pressure. The latitude of the human neck gradually increases from top to bottom. However, the neck massage roller not only does not conform to the physiological curvature of the neck, causing different parts of the neck massage roller to massage the neck with different intensities, resulting in some areas being massaged too lightly and others too heavily, causing discomfort, but the axis of the neck massage roller does not change during the massage process to accommodate the changes in the physiological curve of the neck. In general, the massage effect has certain defects.

[0004] For example, patent application CN209950776U discloses a massage chair, referring to the specification of that patent application [0044-0046],

[0047] , and the appendix to that patent application. Figure 6 , 7 8. "The neck massage mechanism 81 includes a second rotating shaft 811, and the neck massage head 82 is provided with a shaft hole 821. The second rotating shaft 811 is connected to the shaft hole 821. Specifically, by fixing the second rotating shaft 811 to the shaft hole 821, the neck massage mechanism 81 drives the neck massage head 82 to rotate, massaging the neck, promoting blood circulation, thereby eliminating fatigue and relaxing the neck muscles. The neck massage head 82 includes an upper massage head 822 and a lower massage head 823. The diameter of the upper massage head 822 is larger than the diameter of the lower massage head 823, and the height of the lower massage head 823 is higher than the height of the upper massage head 822." The neck massage mechanism in this patent application is also mechanical. Although the upper and lower massage heads have different diameters and heights, resulting in different massage effects on the neck, the massage head (the integrated structure composed of the upper and lower massage heads) is located near the side of the neck and rotates in a plane parallel to the chair back to massage the neck. First, the rotating plane is not compatible with the curved surface of the neck, and can only provide a sufficiently strong massage effect on local areas of the neck. Second, the coverage of the massage area of ​​the neck by the two massage heads is relatively low, resulting in a large blind spot in the massage area of ​​the neck. Considering the above two points, the massage effect of the neck massage mechanism in this patent application is relatively average.

[0005] For example, patent application CN208525345U discloses a multifunctional massage chair that can be assembled, and patent application CN110353967A discloses a massage chair with neck massage function. The neck massage part is mechanical and has similar defects and problems as the two patent applications mentioned above.

[0006] For example, patent application CN111358684A discloses an automatic massage chair based on music therapy. Refer to the specification of that provincial patent application

[0019] and its appendices. Figure 1"The neck massage device 7 includes a thermomagnetic massage pad 13 and a vibrating massager 14; the thermomagnetic massage pad 13 is disposed on the surface of the inner layer of the outer packaging material; the vibrating massager 14 includes massage beads 15 and a vibration box 16, the massage beads 15 are disposed on the surface of the outer packaging material, and the vibration box 16 contains a vibrator, a battery, and a control unit; the control unit is connected to the music playback box 4 via a voice control module 6 for controlling the massage of the thermomagnetic massage pad 13 and the vibrating massager 14." Although the neck massage device in this patent application is also mechanical, it differs from the above-mentioned mechanical biomimetic massage methods in that it massages the neck through vibration. In comparison, vibration is more suitable for massaging the waist and legs, but less suitable for the neck, because the neck is close to the head, and vibrating the neck will also vibrate the head, which can easily cause discomfort such as dizziness and tinnitus.

[0007] For example, patent application CN211884518U discloses a detachable shared massage chair, see the description of that patent application

[0028] and the appendix of that patent application. Figure 3 "The neck massage airbags 3012 are symmetrically arranged on both sides of the upper end of the outer wrapping layer 30112. Each side of the neck massage airbag 3012 has three separate neck airbags 30121, which are connected. Before inflation, the three separate neck airbags 30121 are stacked along the inner side of the massage bracket 3011. After inflation, the separate neck airbags 30121 on both sides compress the neck to massage it." This patent application uses an airbag-type neck massage. If the airbags are under-inflated, the compression force of the separate neck airbags on the neck will be weak, failing to achieve the desired massage effect. However, if the airbags are over-inflated, the compression force is too strong because the separate neck airbags are attached to both sides of the neck, which can easily cause the user to feel suffocated, similar to CN108814919A, and is also dangerous. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a neck massage module for a massage sofa, which presses from both sides of the neck toward the middle by lateral swinging, with a large coverage of the massage area and can balance the pressing force, so as to make the massage effect better.

[0009] The present invention is achieved through the following technical solution.

[0010] A neck massage module for a massage sofa includes a base, a drive motor mounted on the base, a transmission assembly, and two lateral swing structures that are symmetrically positioned. The transmission assembly is connected to the drive motor and drives the two lateral swing structures to swing laterally. Each lateral swing structure is provided with a movable balance frame, and the balance frame is equipped with two lateral massage rollers. When the two lateral massage rollers slide along the neck, the balance mechanism moves relative to the lateral swing structures, so that the pressure applied to the neck by the two lateral massage rollers always remains the same.

[0011] As a further improvement of the present invention, the two horizontal massage rollers of the balance frame are arranged vertically at intervals. The upper horizontal massage roller is used to massage the upper trapezius muscle on both sides of the upper neck, and the lower horizontal massage roller is used to massage the middle trapezius muscle on both sides of the lower neck. The balance frame includes a rotating shaft, a swing arm, and two connecting shafts. The rotating shaft is rotatably connected to the horizontal swing structure around its axis. The middle part of the swing arm is fixedly sleeved on the rotating shaft, and the two connecting shafts are connected to the two ends of the swing arm in opposite directions. The two horizontal massage rollers are slidably sleeved on the two connecting shafts respectively.

[0012] As a further improvement of the present invention, the balance frame is provided with an elastic reset member to drive the swing arm to rotate and reset, and when reset, the positions of the two transverse massage rollers are aligned with the physiological curvature of the neck.

[0013] As a further improvement of the present invention, the neck massage module also includes two longitudinal swing structures that maintain left-right symmetry. The transmission component simultaneously drives the two lateral swing structures and the two longitudinal swing structures to swing laterally and longitudinally, respectively. The longitudinal swing structure is equipped with a longitudinal massage wheel for massaging the middle trapezius muscle located near the spine.

[0014] As a further improvement of the present invention, the oscillation period of the lateral oscillation structure is synchronized with that of the longitudinal oscillation structure, and the pressure applied by the lateral massage roller and the longitudinal massage roller to their respective massage areas increases and decreases synchronously.

[0015] As a further improvement of the present invention, when the two lateral swing structures swing laterally in opposite directions, the two longitudinal swing structures swing upward; when the two lateral swing structures swing laterally in opposite directions, the two longitudinal swing structures swing downward.

[0016] As a further improvement of the present invention, a worm gear is installed at the output end of the drive motor; the transmission assembly includes a transmission shaft, an eccentric wheel, a first collar, and a transmission rod; the transmission shaft and the worm gear are connected by a plurality of gears; the transmission shaft is fixedly connected to the transverse swing structure, which can convert the continuous rotation of the transmission shaft into its own reciprocating swing; the eccentric wheel is fixedly sleeved on the transmission shaft, and the first collar is slidably sleeved on the outer edge of the eccentric wheel; one end of the transmission rod is movably connected to the first collar, and the other end is hinged to the longitudinal swing structure; the longitudinal swing structure is rotatably connected to the base in its swing direction.

[0017] As a further improvement of the present invention, one end of the transmission rod has a spherical structure; the outer edge of the collar has a connecting structure extending toward the longitudinal swing structure, the connecting structure having a movable connecting groove adapted to the shape of the spherical structure; the spherical structure is inserted into the movable connecting groove and slides therewith.

[0018] As a further improvement of the present invention, the lateral swing structure includes an eccentric wheel, a second collar, and a lateral swing fixing seat; the eccentric wheel is fixedly sleeved on the transmission shaft, and the central axes of the two are coplanar and not parallel to each other; the second collar is slidably sleeved on the outer edge of the eccentric wheel; the lateral swing fixing seat is connected to the second collar and is used to set up the balance frame; a limiting seat is provided between the two lateral swing structures, and the end face of the limiting seat facing the two lateral swing structures has a limiting groove extending in the swing direction, and the eccentric collar has a limiting rod slidably inserted into the limiting groove.

[0019] As a further improvement of the present invention, the longitudinal swing structure includes a longitudinal swing arm and a longitudinal swing fixing seat; the middle part of the longitudinal swing arm is rotatably connected to the base in the swing direction of the longitudinal swing structure, one end of the longitudinal swing arm is hinged to the transmission rod, and the other end is connected to the longitudinal swing fixing seat; the longitudinal swing fixing seat is used to install the longitudinal massage wheel.

[0020] The beneficial effects of this invention are:

[0021] 1. By adjusting the balance frame relative to the lateral swing structure, the pressing force applied to the neck by the two lateral massage rollers remains the same, making the massage more comfortable;

[0022] 2. By using two horizontal swing structures and two vertical swing structures to swing back and forth synchronously, the coverage of the neck massage area is improved, blind spots are eliminated, and the massage effect is enhanced. Attached Figure Description

[0023] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings to aid in understanding the objectives and advantages of the present invention, wherein:

[0024] Figure 1 This is a front view of the neck massage module of the massage sofa;

[0025] Figure 2 This is a top view of the neck massage module of the massage sofa.

[0026] Figure 3 This is a left-side view of the neck massage module of the massage sofa.

[0027] Figure 4 This is a schematic diagram of the balance frame structure;

[0028] Figure 5 This is a sectional view of the base;

[0029] Figure 6 This is a schematic diagram of the transmission assembly.

[0030] Figure 7 A schematic diagram of the transmission assembly and the lateral swing structure;

[0031] Figure 8 This is a structural diagram of a columnar structure;

[0032] Figure 9 This is a schematic diagram of the structure of the first ring and the transmission rod;

[0033] Figure 10 An illustration of the human neck;

[0034] ( Figure 10 The left half is a diagram of the neck muscles, and the right half is a diagram of the oscillation trajectory of the upper, lower, and vertical massage rollers.

[0035] Figure 11 for Figure 3 A schematic diagram of the swing trajectory of the three pressing modes of the longitudinal swing structure from a certain perspective. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0037] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0038] Reference Figures 1-3A neck massage module for a massage sofa includes a base 1, a drive motor 5, a transmission assembly, two lateral swing structures 2, and two longitudinal swing structures 3. The base 1 is fixedly installed on the backrest frame of the massage sofa at the position corresponding to the neck. The drive motor 5 is installed inside the base 1. The two lateral swing structures 2 are symmetrically arranged on the upper part of the base 1, and the two longitudinal swing structures 3 are symmetrically arranged on the lower part of the base 1.

[0039] The transmission assembly connects to the drive motor 5 and simultaneously drives two lateral swing structures 2 and two longitudinal swing structures 3. The two lateral swing structures 2 and the two longitudinal swing structures 3 always maintain a symmetrical state; that is, during transmission, when the two lateral swing structures 2 swing synchronously to both sides of the base 1 and synchronously to the center of the base 1, the two longitudinal swing structures 3 swing synchronously upwards and synchronously downwards. It should be noted that in this application, both lateral and longitudinal swings are based on a certain point on the base 1, meaning the movement trajectories of the lateral swing structures 2 and the longitudinal swing structures 3 are arc-shaped. The lateral swing structures 2 and the longitudinal swing structures 3 are equipped with lateral massage rollers 21 and longitudinal massage rollers 31, respectively. Through the reciprocating lateral and longitudinal swings, they provide lateral and longitudinal rolling pressure to the neck, achieving a muscle-relaxing massage effect.

[0040] The horizontal massage roller 21 and the vertical massage roller 31 are usually made of hard plastic to ensure sufficient pressure. Rubber sleeves can be fitted onto the surfaces of the horizontal massage roller 21 and the vertical massage roller 31 to provide a cushioning effect when they contact the neck and press the neck muscles, allowing users to experience a more natural pressing process.

[0041] As the lateral swing structure 2 swings from the side of the base 1 towards the center, the pressure applied to the neck by the two lateral massage rollers 21 gradually increases. The swing speed should not be too fast, as this will cause the user to feel a sudden pressure on their neck, leading to an unconscious tightening of the neck muscles. This not only significantly reduces the massage effect but also makes stiff neck muscles prone to pain under pressure. Furthermore, the user may experience tension during this process, hindering relaxation. Conversely, the swing speed should not be too slow, as this will result in an excessively long massage cycle, leaving the neck under pressure for too long and causing discomfort. A suitable swing speed allows the user to experience a gradual, progressive massage effect. Generally, one swing cycle of the lateral swing structure 2 should be 5-7 seconds, with the pressure on the neck maintained for 3-5 seconds.

[0042] The lateral swing structure 2 is equipped with a movable balance frame, on which two lateral massage rollers 21 are mounted. When the lateral swing structure 2 swings from the side of the base 1 to the middle of the base 1, the two lateral massage rollers 21 contact the neck and apply a pressing force to the neck, and the applied force is different. Under the reaction force of the two lateral massage rollers 21, the balance frame moves relative to the lateral swing structure 2, so that the pressing force applied by the two lateral massage rollers 21 to the neck is the same, which constitutes a balance mechanism. This balance mechanism is dynamically maintained during the swing of the lateral swing structure 2.

[0043] First, this pressure balancing mechanism ensures that the massage intensity on the user's neck is balanced, which is beneficial for the relaxation and stretching of neck muscles. Second, this balancing mechanism is dynamically maintained throughout the swinging process, which maximizes the comfort of the neck massage. Finally, it avoids situations where the pressure applied by a certain horizontal massage roller 21 is too high, causing pain, or the pressure is too low, resulting in an inadequate massage.

[0044] Reference Figure 10 Specifically, the two horizontal massage rollers 21 on the balance frame are arranged vertically at intervals. The upper horizontal massage roller 21 is designated as the upper massage roller 21-1, and the lower horizontal massage roller 21 is designated as the lower massage roller 21-2. The upper massage roller 21-1 massages the upper trapezius muscle located on both sides of the upper neck (X), and the lower massage roller 21-2 massages the middle trapezius muscle located on both sides of the upper neck (Y). The length of the neck corresponds to the vertical distance from the jaw to the clavicle. For a typical East Asian adult, the neck length is approximately 10cm. However, due to differences between men and women, and other individual factors, there may be a deviation of approximately 1-2cm. Considering universality, the massage span formed by the upper massage roller 21-1 and the lower massage roller 21-2 should not exceed 10cm. Otherwise, users with a neck length less than 10cm may experience discomfort by bumping into the occipital bone at the back of the head or by pressing against the shoulder instead of the intended massage area.

[0045] The width of the upper massage roller 21-1 and the lower massage roller 21-2 is 3-4cm, and the vertical distance between them is 2-4cm. The width of the upper massage roller 21-1 and the lower massage roller 21-2 should not be increased further, otherwise the reserved space will be too small, which is not conducive to the spatial layout and installation of the balance frame, and it is also easy to cause mechanical interference. The width should not be reduced further, as it will reduce the massage area covered by the upper massage roller 21-1 and the lower massage roller 21-2 on the neck, thereby weakening the massage effect.

[0046] Reference Figure 4 and combined Figures 1-3The balance frame includes a rotating shaft 41, a swing arm 42, and two connecting shafts 43. The rotating shaft 41 is vertically positioned and rotatably connected to the transverse swing structure 2. The middle part of the swing arm 42 is fixedly sleeved on the rotating shaft 41. The two connecting shafts 43 are fixedly connected to the two ends of the swing arm 42 in opposite directions. The upper massage wheel 21-1 and the lower massage wheel 21-2 are slidably sleeved on their respective connecting shafts 43. The balance frame utilizes the lever principle, using the rotating shaft 41 as a fulcrum. The rotation of the swing arm 42 around the rotating shaft 41 balances the torque of the upper massage wheel 21-1 and the lower massage wheel 21-2, ensuring that the pressure applied by the upper massage wheel 21-1 and the lower massage wheel 21-2 to their respective massage areas remains the same. This lever-based adjustment speed is very rapid. The balance adjustment can be completed the instant the upper massage roller 21-1 and lower massage roller 21-2 apply different pressures to the neck, without causing too much discomfort. Furthermore, the dynamic full-process balance adjustment response speed will not make the user feel any difference in pressure during the subsequent pressing process.

[0047] The balance frame is equipped with an elastic reset component. Specifically, the elastic reset component is a torsion spring 44 fitted onto the rotating shaft 41. The two ends of the torsion spring 44 are fixedly connected to the rotating shaft 41 and the transverse swing structure 2, respectively. When the transverse swing structure 2 swings laterally from the center of the base 1, the upper massage roller 21-1 and lower massage roller 21-2 separate from the neck and no longer exert torque on the rotating shaft 41. Under the action of the torsion spring 44, the swing arm 42 rotates and resets, and the upper massage roller 21-1 and lower massage roller 21-2 return to their initial positions relative to the transverse swing structure 2. To improve the user experience, the difference in initial contact between the upper massage roller 21-1 and lower massage roller 21-2 and the neck should be minimized. Therefore, the initial positions of the upper massage roller 21-1 and lower massage roller 21-2 should ideally conform to the physiological curvature of the neck. The latitude of the neck gradually increases from top to bottom. Figure 1 From the perspective, the upper massage roller 21-1 is closer to the center of the base 1 than the lower massage roller 21-2. Figure 3 From a visual perspective, the upper massage roller 21-1 is further away from the base 1 than the lower massage roller 21-2. Of course, the degree of increase in latitude of the neck from top to bottom varies from person to person. The increase is smaller for thinner people and larger for people with more developed neck muscles or who are overweight. Considering universality, the more natural physiological curvature of the neck of the average person is used as the benchmark.

[0048] Reference Figure 5 , Figure 6The base 1 has a box-like structure, with an internal partition 13 dividing it into two layers. The space between the partition 13 and the bottom plate 12 of the base 1 near the backrest is defined as the first layer, and the space between the partition 13 and the top plate 11 of the base 1 away from the backrest is defined as the second layer. The drive motor 5 is located in the middle of the second layer, and its top output end is equipped with a worm gear 51. The worm gear 51 can be directly installed at the output end of the drive motor 5 instead of the output shaft, or a threaded sleeve can be fixedly fitted onto the output shaft. (Refer to...) Figure 6 The transmission assembly includes a drive shaft 61, which vertically passes through the partition 13 and the top plate 11 of the base 1. The portion of the drive shaft 61 extending out of the base 1 is connected to the transverse swing structure 2. The drive shaft 61 is connected to the worm 51 via multiple gears. Specifically, an intermediate drive shaft 62 is provided between the drive shaft 61 and the worm 51. The two ends of the intermediate drive shaft 62 are rotatably connected to the top plate 11 and the partition 13 of the base 1, respectively. The intermediate drive shaft 62 is fixedly sleeved with a first gear 621 and a second gear 622. The portion of the drive shaft 61 located in the second-layer space is fixedly sleeved with a third gear 623. The first gear 621 meshes with the worm 51, and the second gear 622 meshes with the third gear 623, forming a power transmission from the worm 51 to the drive shaft 61. The first gear 621 of the two transverse swing structures 2 meshes with the worm 51 on both sides, without affecting their respective transmissions, thus realizing the synchronous and opposite swinging of the two transverse swing structures 2.

[0049] Reference Figure 7 To save costs, the drive motor 5 does not have a reduction module. Instead, the reduction function is achieved by adjusting the diameter ratio of the first gear 621, the second gear 622, and the third gear 623. The diameter of the third gear 623 is larger than that of the first gear 621, and the diameter of the first gear 621 is larger than that of the second gear 622. The diameter ratio of the three gears is adjusted according to the required reduction range. The first gear 621 is a helical gear, while the second gear 622 and the third gear 623 are spur gears. During transmission, the teeth of the first gear 621 gradually mesh with and then gradually disengage from the worm 51. The force on the teeth gradually increases and then decreases, which can improve the load-bearing capacity of the teeth and enhance the meshing stability with the worm 51. This makes it suitable as the first transmission component of the transmission assembly.

[0050] Combination Figure 3 , Figure 6 , Figure 7 , Figure 8The lateral swing structure 2 can convert the continuous rotation of the drive shaft 61 into its own reciprocating swing. Specifically, the lateral swing structure 2 includes a column structure 22, a second collar 23, and a lateral swing fixing seat 24. The column structure 22 is fixedly sleeved on the part of the drive shaft 61 that extends out of the base 1. Specifically, the part of the drive shaft 61 that is fixedly sleeved with the column structure 22 can be machined into a flat key structure by a cutting device. Correspondingly, the column structure 22 is machined with a through hole that runs through both ends and matches the shape of the flat key structure. Compared with the straight fit, this fit can reduce the friction loss between the drive shaft 61 and the column structure 22 during the rotation process and improve the transmission efficiency. The surface of the column structure 22 has a circumferentially inclined and inwardly recessed band-shaped annular surface. The portion of the column structure 22 with this band-shaped surface forms a deflector wheel 221. The central axis of the deflector wheel 221 is coplanar with the central axis of the transmission shaft 61 and is not parallel to each other. The included angle between the two is 10-30°. The second collar 23 is slidably sleeved on the outer edge of the deflector wheel 221, i.e., the band-shaped annular surface. A cover 222 is fixedly sleeved on the end of the transmission shaft 61 that extends out of the base 1 and presses against the end face of the column structure 22. The stepped structure 223 of the column structure 22 protruding outward relative to the band-shaped annular surface and the cover 222 form a limiting structure to restrict the second collar 23 from moving axially along the transmission shaft 61. A limiting seat 25 is fixed on the top plate 11 of the base 1, located between the two transverse swing structures 2. The end face of the limiting seat 25 facing the transverse swing structure 2 has a limiting groove 251, which extends along the swing direction of the transverse swing structure 2. The part of the second ring 23 near the limiting seat 25 has an integral limiting rod 231, which is slidably inserted into the corresponding limiting groove 251. The part of the second ring 23 away from the limiting seat 25 is integrally connected to the transverse swing fixing seat 24, and the balance frame is installed on the transverse swing fixing seat 24. The limiting rod 231 is restricted within the limiting groove 251 of the limiting seat 25. Therefore, when the drive shaft 61 drives the column structure 22 to rotate, the second ring 23 rotates relative to the column structure 22 around the skew wheel 221, but does not rotate relative to the base 1. Thus, the transverse swing fixing seat 24 drives the balance frame and the upper massage wheel 21-1 and lower massage wheel 21-2 to swing laterally back and forth.

[0051] It is worth noting that the balance frame, as well as the upper massage roller 21-1 and lower massage roller 21-2, will tilt upwards or downwards during their reciprocating oscillation. Specifically, when the balance frame oscillates from the side of the base 1 towards the center of the base 1, it will tilt upwards or downwards depending on the clockwise or counterclockwise rotation direction of the drive shaft 61, with the tilt amplitude gradually increasing and then decreasing again. When the balance frame oscillates from the center of the base 1 towards the side of the base 1, it will tilt in the opposite direction, with the tilt amplitude similarly gradually increasing and then decreasing again. This oscillation method of the balance frame allows the upper massage roller 21-1 and lower massage roller 21-2 to synchronize their lateral oscillation and upward or downward tilting movements. While pressing the neck muscles, it also performs a kneading motion similar to a sequential shoulder and neck massage, which is closer to biomimetic movements. Compared to simply pressing the neck muscles, it can more thoroughly relax the muscles, eliminate neck muscle fatigue and tension, and effectively promote blood circulation, clear the meridians, and improve neck blood circulation.

[0052] The lateral swing fixing base 24 is an assembleable and detachable structure. Its main body is plate-shaped. The lateral swing fixing base 24 includes a base plate 241 integrated with the second ring 23, a top plate 242 detachably fixedly connected to the base plate 241, and a bracket 243 integrated with the top plate. The bracket 243 is a flat, hollow structure. The pivot 41 and swing rod 42 of the balance frame are located inside the bracket. The two ends of the pivot 41 are rotatably connected to the two panels of the bracket 243. The two panels of the bracket 243 have slots that allow the two connecting shafts 43 to pass through and avoid interference when the connecting shafts 43 swing. Furthermore, the base plate 241 and the top plate 242 are fixedly connected by multiple bolts passing through them. This detachable fixed internal connection method allows adjustment of the relative position of the top plate 242 and the base plate 241, thereby adjusting the distance between the two sets of balance frames to suit users with necks of different thicknesses.

[0053] Reference Figures 6-9 The transmission assembly also includes an eccentric wheel 63, a first collar 64, and a transmission rod 65. The eccentric wheel 63 is located within a single layer of space in the base 1 and is sleeved and fixed to the transmission shaft 61. Specifically, similar to the fit between the transmission shaft 61 and the column structure 22, the portion of the transmission shaft 61 inserted into the eccentric wheel 63 can be machined into a flat key structure using a cutting device, and the through hole of the eccentric wheel 63 is machined into a matching shape. The first collar 64 is slidably sleeved on the outer edge of the eccentric wheel 63, and both ends of the eccentric wheel 63 have flange structures to restrict the movement of the first collar 64 along the axial direction of the transmission shaft 61. One end of the transmission rod 65 is movably connected to the first collar 64, and the other end is hinged to the longitudinal swing structure 3, which is rotatably connected to the base 1 in its swing direction. When the drive shaft 61 rotates, it drives the eccentric wheel 63 to rotate, and the first ring 64 rotates around the eccentric wheel 63, thereby driving the drive rod 65 to pull the longitudinal swing structure 3 to swing longitudinally back and forth.

[0054] Specifically, the outer edge of the first ring 64 has a connecting structure 641 integral with it and extending towards the longitudinal swing structure 3. The end of the connecting structure 641 near the longitudinal swing structure 3 has a movable connecting groove 642 facing the longitudinal swing structure 3. This movable connecting groove 642 is spherical. The end of the transmission rod 65 near the connecting structure 641 has a spherical structure 651 that matches the shape of the movable connecting groove 642. This spherical structure 651 engages with and slides within the movable connecting groove 642. When the transmission shaft 61 rotates, it drives the eccentric wheel 63 to rotate. The rotation of the first ring 64 around the eccentric wheel 63 causes the transmission rod 65 to slide longitudinally, thus causing the longitudinal swing structure 3 to swing longitudinally. Since the longitudinal swing of the longitudinal swing structure 3 is an arc-shaped movement trajectory, the longitudinal swing structure 3, in turn, also drives the transmission rod 65 to reciprocate longitudinally with a small amplitude around the spherical structure 651 as the center of rotation. The engagement between the spherical structure 651 and the sliding connecting groove allows this rotation to occur.

[0055] Although the first ring 64 is slidably fitted onto the outer edge of the eccentric wheel 63, there is still a certain amount of mutual friction between the two. Furthermore, there is a mechanical gap in the hinge between the transmission rod 65 and the longitudinal swing structure 3. Therefore, the connecting structure 641 will rotate a certain amount in the direction of rotation of the eccentric wheel 63. Although the rotation amplitude is small, it will still drive the transmission rod 65 to rotate slightly in the transverse direction around the hinge point between the transmission rod 65 and the longitudinal swing structure 3. If the transmission rod 65 and the connecting structure 641 are rigidly connected in the transverse direction, the connecting structure 641 is prone to damage, and the transmission rod 65 is also prone to bending. However, the fit between the spherical structure 651 and the sliding connecting groove allows this rotation to occur, which can avoid structural damage.

[0056] The connecting structure 641 is a detachable structure, consisting of two plate-like structures 6411 that are attached to each other and fixedly connected by fasteners. One of the plate-like structures 6411 is an integral structure with the first ring 64, which facilitates the insertion of the spherical structure 651 into the movable connecting groove 642. During installation, the spherical structure 651 is first attached to half of the movable connecting groove 642 of one of the plate-like structures 6411, and then the two plate-like structures 6411 are attached together and fixedly connected, so that the movable connecting groove 642 is snapped in and the spherical structure 651 is inserted into it.

[0057] The longitudinal swing structure 3 includes a longitudinal swing arm 32 and a longitudinal swing fixing seat 33. The longitudinal swing fixing seat 33 and the longitudinal swing arm 32 are an integral structure. The structure of the longitudinal swing fixing seat 33 is similar to that of the transverse swing fixing seat 24. It is also an assembleable and detachable structure, including a base plate integral with the longitudinal swing arm 32, a top plate detachably fixed to the base plate, and a bracket integral with the top plate for mounting the longitudinal massage roller 31. The detachable installation is used to adjust the distance between the two longitudinal swing structures 3, which will not be described in detail here.

[0058] Combination Figure 2 , Figure 5 , Figure 6 The top plate 11 and partition 13 of the base 1 both have slots that allow the longitudinal swing arm 32 to pass through and avoid it when the longitudinal swing arm 32 swings. The top plate 11 of the base 1 has a pivot structure 34 at the slot through which the longitudinal swing arm 32 passes. The longitudinal swing arm 32 is rotatably mounted on the pivot structure 34. The end of the longitudinal swing arm 32 located in the first layer space is hinged to the transmission rod 65. The longitudinal swing arm 32 drives the longitudinal swing fixing seat 33 and the longitudinal massage wheel 31 to swing along the longitudinal direction with the pivot structure 34 as the rotation center.

[0059] Reference Figure 10 The longitudinal massage roller 31 is used to massage the middle trapezius muscle located near the spine (Z portion). In existing technologies, most mechanical massage sofas use modular subdivisions for massage, typically with dedicated massage modules for the neck and back. However, there are blind spots in the massage coverage areas of these modules, and the trapezius muscle located near the spine is a massage blind spot between the neck and back. In this application, the transmission component can simultaneously drive the lateral swing structure 2 and the longitudinal swing structure 3 to swing laterally and longitudinally, respectively, so that the upper trapezius muscle located on both sides of the upper neck (X portion), the middle trapezius muscle located on both sides of the lower neck, and the middle trapezius muscle located near the spine (Z portion) are massaged simultaneously. This eliminates the massage blind spot between the neck and back, expands the massage coverage area, and thus improves the massage effect.

[0060] By adjusting the relative positions of the various parts of the transmission assembly, the swing cycles of the lateral swing structure 2 and the longitudinal swing structure 3 can be synchronized, thus making the neck massage module periodic as a whole, which is beneficial to the user's massage experience.

[0061] Combination Figure 10 , Figure 11Unlike the horizontal swing structure 2, when the vertical swing amplitude of the vertical swing structure 3 is the same, the pressing pattern is different depending on the position of the upper swing stop j and the lower swing stop k of the vertical swing structure 3. There are roughly three modes: (a) If the positions of the upper swing stop j and the lower swing stop k are moderate, the vertical massage roller 31 maintains pressure throughout the vertical swing of the vertical swing structure 3 from the upper swing stop j to the lower swing stop k, and the pressing force gradually increases from small to large and then decreases again, and vice versa. (b) If the positions of the upper swing stop j and the lower swing stop k are high, the vertical massage roller 31 gradually increases the pressing force on the neck from not contacting it during the vertical swing of the vertical swing structure 3 from the upper swing stop j to the lower swing stop k. (c) If the positions of the upper swing stop j and the lower swing stop k are low, the vertical massage roller 31 gradually increases the pressing force on the neck from not contacting it during the vertical swing of the vertical swing structure 3 from the lower swing stop k to the upper swing stop j.

[0062] The horizontal massage roller 21 massages in a cycle by pressing and releasing. If the vertical massage roller 31 is in mode (a), the middle trapezius muscle, located near the spine, will always be under the pressure of the vertical massage roller 31, which may cause fatigue, numbness and other discomfort in this area. Therefore, mode (a) can be ruled out first.

[0063] In both mode (b) and mode (c), the longitudinal swing structure 3 and the transverse swing structure 2 have two different rhythmic coordination methods: (A) When the transverse massage roller 21 swings laterally from the side of the base 1 to the middle of the base 1, the longitudinal massage roller 31 in mode (b) swings longitudinally from the lower swing stop point k to the upper swing stop point j, and the longitudinal massage roller 31 in mode (c) swings longitudinally from the upper swing stop point j to the lower swing stop point k. During this process, the transverse massage roller 21 gradually increases the pressure on the neck from not contacting it (releasing to pressing), and the longitudinal massage roller 31 gradually decreases the pressure on the neck until it no longer contacts the neck (pressing to releasing). (B) When the horizontal massage roller 21 swings horizontally from the side of the base 1 to the middle of the base 1, the vertical massage roller 31 in mode (b) swings vertically from the upper swing stop point j to the lower swing stop point k, and the vertical massage roller 31 in mode (c) swings vertically from the lower swing stop point k to the upper swing stop point j. During this process, the horizontal massage roller 21 gradually increases the pressure on the neck from not contacting it (releasing to pressing), and the vertical massage roller 31 gradually increases the pressure on the neck from not contacting it (releasing to pressing).

[0064] In method (A), the pressing processes of the horizontal massage roller 21 and the vertical massage roller 31 are opposite, meaning the massage is continuous. Although the pressing areas are different, the neck is constantly under pressure, which can easily lead to fatigue and boredom for the user, negatively impacting the massage effect. In method (B), the pressing processes of the horizontal massage roller 21 and the vertical massage roller 31 are the same, both intermittently alternating between pressing and releasing. After short pauses, the pressure gradually increases across all three massage areas. The overall massage stimulation matches a sine curve, resulting in a stronger rhythm and allowing the user to relax and enjoy the comfort of the massage. Therefore, method (A) is excluded, and method (B) is selected.

[0065] Finally, in the coordination method (B), modes (b) and (c) are selected. The horizontal massage roller 21 and the vertical massage roller 31, while pressing the neck muscles, also gently push the muscles in the direction of their swing. Mode (b): The horizontal massage roller 21 pushes the upper trapezius muscle (located on both sides of the upper neck) and the middle trapezius muscle (located on both sides of the lower neck) from the side towards the center, while the vertical massage roller 31 pushes the middle trapezius muscle (located on both sides of the lower neck) from top to bottom. Mode (c): The horizontal massage roller 21 pushes the upper trapezius muscle (located on both sides of the upper neck) and the middle trapezius muscle (located on both sides of the lower neck) from the side towards the center, while the vertical massage roller 31 pushes the middle trapezius muscle (located on both sides of the lower neck) from bottom to top. In mode (b), the coordinated movements of the horizontal massage roller 21 and the vertical massage roller 31 are equivalent to a clockwise twist on the muscles of the left side of the neck and a counter-clockwise twist on the muscles of the right side of the neck. In mode (c), the coordinated movements of the horizontal massage roller 21 and the vertical massage roller 31 are equivalent to pushing and pressing the muscles of the left and right halves of the neck from different positions and in different directions towards a unified position. In contrast, the coordinated movements in mode (c) cause the neck muscles to be pushed and tightened more, resulting in a higher peak value of the positive selection curve that matches the massage stimulation intensity. Combined with the intermittent, alternating tightening and loosening massage method, this further enhances the massage effect.

[0066] In summary, by adjusting the relative positions of the various components in the transmission assembly, the column structure 22, the length of the transmission rod 65, and the setting position of the pivot structure 34, the upper swing stop point j and the lower swing stop point k of the longitudinal swing structure 3 are positioned higher. When the transverse massage wheel 21 swings laterally from the side to the middle, the longitudinal massage wheel 31 swings longitudinally from bottom to top. When the transverse massage wheel 21 swings laterally from the middle to the side, the longitudinal massage wheel 31 swings longitudinally from top to bottom.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A neck massage module of a massage sofa, characterized in that, It includes a base, a drive motor mounted on the base, a transmission assembly, and two lateral swing structures; The base (1) is fixedly installed on the backrest frame of the massage sofa at the position corresponding to the neck; The drive motor (5) is installed in the base (1) in the vertical direction; Two lateral swing structures (2) are symmetrically arranged on the upper part of the base (1). The movement trajectory of the lateral swing structure (2) is an arc in the left and right direction, and the base point of the arc is on the base (1). Two longitudinal swing structures (3) are symmetrically arranged on the lower part of the base 1; the movement trajectory of the longitudinal swing structure (3) is an arc in the vertical direction, and the base point of the arc is on the base (1). The longitudinal swing structure (3) is rotatably connected to the base (1) in the swing direction. The transmission assembly is connected to the drive motor and used to drive the two lateral swing structures to swing laterally. The lateral swing structure is equipped with a movable balance frame, which is fitted with two lateral massage rollers. When the two lateral massage rollers slide along the neck, the balance frame moves relative to the lateral swing structure, so that the pressure applied to the neck by the two lateral massage rollers always remains the same. The two horizontal massage rollers of the balance frame are arranged vertically at intervals. The upper horizontal massage roller is used to massage the upper trapezius muscle on both sides of the upper neck (X), and the lower horizontal massage roller is used to massage the middle trapezius muscle on both sides of the lower neck (Y). The initial positions of the upper horizontal massage roller and the lower horizontal massage roller are: the upper horizontal massage roller is closer to the center of the base (1) than the lower horizontal massage roller, and the upper horizontal massage roller is farther away from the base (1) than the lower horizontal massage roller. The transmission assembly simultaneously drives two lateral swing structures and two longitudinal swing structures to swing laterally and longitudinally respectively, so that the upper trapezius muscle located on both sides of the upper neck (X), the middle trapezius muscle located on both sides of the lower neck (Y), and the middle trapezius muscle located near the spine (Z) are massaged at the same time; the longitudinal swing structure is equipped with a longitudinal massage wheel to massage the middle trapezius muscle located near the spine (Z). The oscillation cycle of the lateral oscillation structure is synchronized with that of the longitudinal oscillation structure, and the pressure applied by the lateral massage roller and the longitudinal massage roller to their respective massage areas increases and decreases synchronously. When the two lateral swinging structures swing laterally in opposite directions to press and close the neck portions X and Y, the two longitudinal swinging structures swing from bottom to top to press and close the neck portion Z; when the two lateral swinging structures swing laterally in opposite directions to separate and relax the neck portions X and Y, the two longitudinal swinging structures swing from top to bottom to relax the neck portion Z. The longitudinal and lateral oscillation structures work together as follows: When the lateral massage roller oscillates laterally from the side of the base towards the center of the base, the pressure applied to the neck gradually increases from no contact, and the pressure applied to the neck gradually increases from no contact. Specifically, while the lateral massage roller presses the upper trapezius muscle (located on both sides of the upper neck) and the middle trapezius muscle (located on both sides of the lower neck) from the side towards the center, the longitudinal massage roller presses the middle trapezius muscle (located on both sides of the lower neck) from top to bottom. Alternatively, while the lateral massage roller presses the upper trapezius muscle (located on both sides of the upper neck) and the middle trapezius muscle (located on both sides of the lower neck) from the side towards the center, the longitudinal massage roller presses the middle trapezius muscle (located on both sides of the lower neck) from bottom to top. The balance frame includes a rotating shaft, a swing arm, and two connecting shafts. The rotating shaft is rotatably connected to the transverse swing structure around its axis. The middle part of the swing arm is fixedly sleeved on the rotating shaft, and the two connecting shafts are connected to the two ends of the swing arm in opposite directions. Two transverse massage rollers are slidably sleeved on the two connecting shafts respectively. The balance frame is provided with an elastic reset member to drive the swing arm to rotate and reset, and when reset, the position of the two transverse massage rollers matches the physiological curvature of the neck. The output end of the drive motor is equipped with a worm gear; the transmission assembly includes a transmission shaft, an eccentric wheel, a first collar, and a transmission rod; the transmission shaft and the worm gear are connected by multiple gears; the transmission shaft is fixedly connected to the transverse swing structure, which can convert the continuous rotation of the transmission shaft into its own reciprocating swing; the eccentric wheel is fixedly sleeved on the transmission shaft, and the first collar is slidably sleeved on the outer edge of the eccentric wheel; one end of the transmission rod is movably connected to the first collar, and the other end is hinged to the longitudinal swing structure; The lateral swing structure includes an eccentric wheel, a second collar, and a lateral swing fixing seat. The eccentric wheel is fixedly sleeved on the drive shaft, and the central axes of the two are coplanar and non-parallel. The second collar is slidably sleeved on the outer edge of the eccentric wheel. The lateral swing fixing seat is connected to the second collar and is used to install a balance frame. A limiting seat is provided between the two lateral swing structures. The end face of the limiting seat facing the two lateral swing structures has a limiting groove extending in the swing direction. The second collar has a limiting rod slidably inserted into the limiting groove. The end of the limiting groove facing away from the base is closed by the limiting seat. The longitudinal swing structure includes a longitudinal swing arm and a longitudinal swing fixing seat; the middle part of the longitudinal swing arm is rotatably connected to the base in the swing direction of the longitudinal swing structure, one end of the longitudinal swing arm is hinged to the transmission rod, and the other end is connected to the longitudinal swing fixing seat; the longitudinal swing fixing seat is used to install the longitudinal massage wheel.

2. The neck massage module of the massage sofa according to claim 1, characterized in that, One end of the transmission rod has a spherical structure; the outer edge of the first collar has a connecting structure extending toward the longitudinal swing structure, the connecting structure having a movable connecting groove adapted to the shape of the spherical structure; the spherical structure is inserted into the movable connecting groove and slides therewith.

Images