Lower limb massage mechanism and massage chair

Abstract

The invention discloses a lower limb massage mechanism and a massage chair. The lower limb massage mechanism comprises a bottom plate, a driving shaft, a shaft sleeve, a middle massage part, a swing rod and an outer side arm, the bottom plate is arranged close to the lower limbs of a user, and the driving shaft is rotatably arranged on the bottom plate; the middle massage part and the outer side arm are arranged on the bottom plate at intervals and located on the two sides of the lower limbs of a user, an eccentric cam is fixedly arranged on the driving shaft, the shaft sleeve is arranged on the peripheral face of the eccentric cam in a sleeving mode and can rotate relative to the eccentric cam, and the shaft sleeve is fixed to one end of the middle massage part; one end of the swing rod is hinged to the bottom plate, and the other end of the swing rod is hinged to the position, away from the shaft sleeve, of the middle massage piece. When the driving shaft rotates, the eccentric cam drives the middle massage piece to move through the shaft sleeve, and the swing rod is driven by the middle massage piece to synchronously swing so as to limit the movement range of the middle massage piece. The crank movement is realized in the form of the eccentric cam, so that the lower limb massage mechanism is not easy to get stuck during operation, and the movement of the lower limb massage mechanism is smoother.

Description

Technical Field

[0001] The present invention relates to the technical field of massage, and in particular to a lower limb massage mechanism and a massage chair. Background Art

[0002] Lower limb massagers are currently commonly used in massage equipment, which can relieve lower limb fatigue, promote blood circulation, relieve muscle tension, etc. Providing a better and more comfortable massage experience through appropriate innovation of leg or foot massage mechanisms is an important factor for products to win the market.

[0003] There are usually two forms of calf massage in existing lower limb massagers: one is a combination of air bags and convex points, which squeezes and massages the calf by inflating and deflating air. This massage method has a relatively simple experience; the other is a motor-driven kneading component that rubs the calf up and down. This method will make the knee feel pulled during massage, causing discomfort, and the connection structure is subjected to greater stress, resulting in a shorter life of the massager. Summary of the invention

[0004] The present invention aims at the deficiencies of the prior art and proposes a lower limb massage mechanism and a massage chair, thereby solving the problems of the existing lower limb massagers having large driving connection forces, poor smoothness during operation, and poor massage comfort.

[0005] The present invention provides a lower limb massage mechanism for massaging a user's lower limbs, comprising a base plate, a drive shaft, a shaft sleeve, a middle massage piece, a swing rod and an outer arm; the base plate is arranged close to the user's lower limbs, and the drive shaft is rotatably arranged on the base plate;

[0006] The middle massage piece and the outer arms are arranged at intervals on the bottom plate and are located on both sides of the user's lower limbs. An eccentric cam is fixed on the driving shaft. The shaft sleeve is sleeved on the outer peripheral surface of the eccentric cam and can rotate relative to the eccentric cam. The shaft sleeve is fixed on one end of the middle massage piece.

[0007] One end of the swing rod is hinged to the bottom plate, and the other end of the swing rod is hinged to a position on the middle massage element away from the shaft sleeve;

[0008] When the driving shaft rotates, the eccentric cam drives the middle massage part to move through the sleeve, and the swing rod swings synchronously under the drive of the middle massage part to limit the movement range of the middle massage part. The middle massage part cooperates with the outer arm to massage the user's lower limbs.

[0009] On the other hand, the present invention also provides a massage chair, which includes the above-mentioned lower limb massage mechanism, and further includes a chair frame. A guide rail is provided on the chair frame, and a reciprocating massage mechanism is provided on the guide rail. A massage swing arm is provided on the massage mechanism, and the massage swing arm can extend in a direction away from the massage mechanism; the lower limb massage mechanism is arranged at the front end of the chair frame and can massage the user alone or cooperate with the massage mechanism to perform stretching massage on the user;

[0010] It further includes a control mechanism, and the control mechanism controls the movement of the massage mechanism and the lower limb massage mechanism.

[0011] By adopting the above technical solutions, the present invention can achieve the following technical effects: Compared with the prior art, the lower limb massage mechanism is used to massage the lower limbs of the user, and includes a bottom plate, a drive shaft, a bushing, a middle massage member, a swing rod and an outer arm; the bottom plate is arranged close to the lower limbs of the user, and the drive shaft is rotatably arranged on the bottom plate; the middle massage member and the outer arm are arranged at intervals on the bottom plate and are located on both sides of the user's lower limbs. An eccentric cam is fixedly arranged on the drive shaft, the bushing is sleeved on the outer peripheral surface of the eccentric cam and can rotate relative to the eccentric cam, and the bushing is fixed at one end of the middle massage member; one end of the swing rod is hinged on the bottom plate, and the other end of the swing rod is hinged at a position on the middle massage member far from the bushing; when the drive shaft rotates, the eccentric cam drives the middle massage member to move through the bushing, and the swing rod swings synchronously under the drive of the middle massage member to limit the movement range of the middle massage member, and the middle massage member cooperates with the outer arm to massage the lower limbs of the user. In the present invention, the crank motion is realized in the form of an eccentric cam. Compared with a rod-shaped crank, the lower limb massage mechanism will not be too large in volume, and it will not be easily stuck during operation, and effectively avoids the problem of large force at the connection, making the movement of the lower limb massage mechanism smoother. The swing of the middle massage member is used to cooperate with the outer wall to generate a rubbing feeling on the user's calf, further improving the massage comfort. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0013] Figure 1 Shows a schematic structural diagram of a lower limb massage mechanism according to an embodiment of the present invention;

[0014] Figures 2 to 15 Shows Figure 1Schematic exploded view of a lower limb massage mechanism

[0015] Reference numerals

[0016] 1 - Base plate, 2 - Drive shaft, 21 - Eccentric cam, 211 - Bush, 3 - Middle massage member, 4 - Swing rod, 31 - Airbag, 5 - Support rod, 61 - Pressing shaft, 63 - Bearing seat, 22 - Perforation, 7 - One - way bearing, 62 - Pressing cam, 83 - Sleeve hole, 84 - Limiting rod, 11 - Limiting groove, 9 - Drive assembly, 91 - Motor, - Motor housing, 71 - Outer ring, 72 - Inner ring, 922 - Turbine, 611 - Pressing shaft sleeve, 81 - Left swing arm assembly, 82 - Right swing arm assembly, 8 - Massage roller, 911 - Motor housing sheet metal, 85 - Rubber inner sleeve, 86 - Swing arm skeleton, 87 - Swing arm housing, 12 - Hall sensor, 13 - Magnet, 14 - Magnet holder Detailed implementation manners

[0017] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention

[0018] Combined with the attached Figures 1 - 15 As shown, an embodiment of the present invention provides a lower limb massage mechanism for massaging the lower limbs of a user, which is characterized in that it includes a base plate 1, a drive shaft 2, a bush 211, a middle massage member 3, a swing rod 4 and an outer arm; the base plate 1 is arranged close to the lower limbs of the user, and the drive shaft 2 is rotatably arranged on the base plate 1

[0019] The middle massage member 3 and the outer arm are arranged at intervals on the base plate 1 and are located on both sides of the lower limbs of the user. An eccentric cam 21 is fixedly arranged on the drive shaft 2. The bush 211 is sleeved on the outer peripheral surface of the eccentric cam 21 and can rotate relative to the eccentric cam 21. The bush 211 is fixed to one end of the middle massage member 3

[0020] One end of the swing rod 4 is hinged to the base plate 1, and the other end of the swing rod 4 is hinged to a position on the middle massage member 3 far from the bush 211

[0021] When the drive shaft 2 rotates, the eccentric cam 21 drives the middle massage member 3 to move through the bush 211. The swing rod 4 swings synchronously under the drive of the middle massage member 3 to limit the movement range of the middle massage member 3. The middle massage member 3 and the outer arm cooperate to massage the lower limbs of the user

[0022] In the present invention, the crank motion is realized by using the form of an eccentric cam. Compared with a rod-shaped crank, the lower limb massage mechanism will not be too large in volume, and it will not be easily jammed during operation, effectively avoiding the problem of large force at the connection, making the movement of the lower limb massage mechanism smoother. The swing of the middle massage member is used to generate a rubbing feeling on the calf of the user, further improving the massage comfort.

[0023] Further, in an example, in order to improve the massage comfort, as shown in the figure, air bags 31 are provided on the middle massage member 3 and the outer arm, and the air bags are used to massage the lower limbs.

[0024] Further, in an example, it further includes a support rod 5. One end of the support rod 5 is fixed on the base plate 1, and the other end of the support rod 5 is arranged away from the bushing 211. One end of the swing rod 4 is hinged to the other end of the support rod 5.

[0025] Further, in an example, it further includes a pressing drive mechanism. The outer arm is movably connected to the base plate 1, and the pressing drive mechanism drives the outer arm to move to press the lower limbs of the user. The pressing drive mechanism includes a pressing shaft 61. The pressing shaft 61 is arranged on the base plate 1 through a bearing seat 63. A through hole 22 is provided in the drive shaft 2, and a one-way bearing 7 is sleeved in the through hole 22. The pressing shaft 61 extends into the through hole 22 and is connected to the drive shaft 2 through the one-way bearing 7. When the drive shaft 2 rotates forward, the one-way bearing 7 drives the pressing shaft 61 to rotate. When the drive shaft 2 rotates reversely, the one-way bearing 7 does not drive the pressing shaft 61 to rotate.

[0026] A new lower limb massage mechanism is provided, which can bring a more comfortable calf massage experience. Moreover, the massage action of this lower limb massage mechanism is obvious in dynamics and has a high degree of manifestation. By using the one-way property of the one-way bearing, a single motor can drive the transmission system to perform different actions when rotating forward and backward, which is equivalent to saving the cost of one motor and achieving the solution of more complex problems with a lower cost.

[0027] Further, in an example, a pressing cam 62 is provided on the pressing shaft 61. A sleeve hole 83 and a limiting rod 84 are provided on the outer arm, and a limiting groove 11 is provided on the base 1. The central axis of the pressing cam 62 is inclined relative to the central axis of the pressing shaft 61. The outer arm is sleeved on the pressing cam 62 through the sleeve hole 83. The limiting rod 84 is arranged on the outer arm and inserted into the limiting groove 11. When the pressing shaft 61 rotates, the pressing cam 62 drives the outer arm to swing along the limiting groove 84 through the sleeve hole 83 so as to press the lower limbs.

[0028] Further, in one example, it further includes a driving component 9. The driving component 9 drives the driving shaft 2 to rotate. The driving component 9 includes a motor 91 and a motor housing 92. The outer ring 71 of the one-way bearing 7 has a plurality of key grooves and is key-connected to the inner side of the turbine 922 in the motor housing 92. The one-way bearing 7 is key-connected to a press shaft sleeve 611 provided on the press shaft 61.

[0029] As shown in the figure, in one example, the outer arm may include a left swing arm assembly 81 and a right swing arm assembly 82. The driving component is fixed on the bottom plate. The press shaft 61 is arranged on the bottom plate 1 through a bearing seat 63. The driving component 9 includes a motor 91 and a motor housing 92. The outer ring 71 of the one-way bearing 7 is key-connected to the inner side of the turbine 922 in the motor housing 92. The inner ring 72 of the one-way bearing 7 is sleeved on the press shaft 61. The driving shaft 2 is relatively rotatably sleeved on the press shaft 61 and is fixedly connected to the outer ring 71 of the one-way bearing 7. The left swing arm assembly 81 and the right swing arm assembly 82 are respectively arranged at both ends of the press shaft 61 through a press cam 62. The middle massage member 3 is arranged on the driving shaft 2 through a shaft sleeve 211.

[0030] When the motor 91 rotates forward, the turbine 922 drives the outer ring 71 of the one-way bearing 7 to rotate. The outer ring 71 of the one-way bearing 7 drives the inner ring 72 of the one-way bearing 7 to rotate, thereby driving the press shaft 61 and the driving shaft 2 to rotate simultaneously, so that the left swing arm assembly 81 and the right swing arm assembly 82 perform a swinging motion driven by the press shaft 61, and the middle massage member 3 performs an eccentric rubbing motion driven by the driving shaft 2.

[0031] When the motor 91 rotates in reverse, the turbine 922 drives the outer ring 71 of the one-way bearing 7 to rotate. The inner ring 72 of the one-way bearing 7 does not move. Thus, the press shaft 61 does not move, and the driving shaft 2 rotates, so that the left swing arm assembly 81 and the right swing arm assembly 82 do not move, and the middle massage member 3 performs an eccentric rubbing motion driven by the driving shaft 2.

[0032] Specifically, the bottom plate 1 is the installation foundation of this mechanism, and all parts are finally installed on the bottom plate 1. The motor 91 and the worm gear 922 in the drive assembly 9 are arranged at the central position of the pressing shaft 61. The motor housing sheet metal 911 is fixed on the bottom plate 1, and left and right boxes are also installed on both sides of the motor housing 92 for fixing the motor 91 and the worm gear 922. When the motor 91 rotates, the worm gear 922 is driven to rotate through the worm gear - worm drive. When the worm gear 922 rotates, it will symmetrically drive the drive shaft 2 to rotate. The small end of the drive shaft 2 forms a profiled connection with the inner hole of the eccentric cam 21 and the inner hole of the massage roller 8. Therefore, when the drive shaft 2 rotates, it will drive the eccentric cam 21 to rotate. It should be noted that wherever there is a clearance fit in the present invention, generally lubricating oil can be applied to the clearance fit surface to reduce the frictional resistance of rotation.

[0033] Specifically, one end of the support rod 5 is fixedly connected to the bottom plate 1 by threaded connection and is located below the drive assembly 9, and the other end is hinged with a swing rod 4, and the other end of the swing rod 4 is hinged to the middle massage member 3. In addition to connecting and fixing the middle massage member 3, the support rod 5 can also support the motor housing sheet metal 911, playing an auxiliary fixing role.

[0034] Figure 2 It is an assembly schematic diagram of the bottom plate 1, the pressing shaft 61, and the middle massage member 3. The rotation of the motor 91 can drive the eccentric cam 21 to rotate around the drive shaft 2. The eccentric cam 21 is embedded in the bushing 211, and the contact surface between the bushing 211 and the eccentric cam 21 has a clearance fit, so that the eccentric cam 21 can rotate freely relative to the bushing 211. The bushing 211 is fixed to the middle massage member 3 by threaded connection. The middle massage member 3 is also hinge - connected to one end of the swing rod 4.

[0035] If the center points of the eccentric cam 21, the drive shaft 2, and the two hinge points of the swing rod 4 are marked out and the four points are connected end to end, as Figure 14 shown, the four lines obtained can be regarded as four rods. According to relevant mechanism theory and specific numerical values, it can be proved that the eccentric cam motion mechanism in the present invention is essentially equivalent to the crank - rocker mechanism in the four - bar mechanism. The AD rod is the driving rod and the crank of this four - bar mechanism; the AB rod is the frame rod; the BC rod is the rocker; the CD rod is the connecting rod. As the AD rod makes a full - circle rotation, the CD rod will make a planar motion that is neither translational nor rotational but swings back and forth, and the middle massage member fixed to the CD rod will make the same motion. The swing of the middle massage member is used to generate a rubbing feeling on the user's calf. When the middle massage member actually works, objects with a certain soft texture such as air bags or rubber can be attached to the surface to obtain a comfortable massage experience.

[0036] It should be noted that in the embodiments of the present invention, the form of an eccentric cam is used to replace the rod-shaped crank because in the lower limb massage mechanism, the length of the crank is not easy to be too long. If a rod-shaped crank is directly used, it is easy to get stuck during operation, and the force at the connection will be very large. The form of the eccentric cam adopted in the present invention well avoids these problems and makes the movement of the lower limb massage mechanism smoother.

[0037] Furthermore, in addition to the movement of the middle massage member 3 and the eccentric cam 21, there is another massage movement in this lower limb massage mechanism. This movement is also driven by the motor and can use a one-way bearing to control whether the movement occurs. Among them, the one-way bearing 7 is a special type of bearing. When the outer ring rotates relative to the inner ring in a certain direction, the resistance is very small and can be regarded as having no resistance. When rotating in the other direction, a large resistance will be encountered. Under the condition that the external force does not exceed the maximum load, it can be regarded that the inner and outer rings can only rotate relative to each other in one direction. This is a standard component and will not be elaborated in the present invention.

[0038] Furthermore, in an example, the outer ring 71 of the one-way bearing 7 has a plurality of key grooves, and the worm gear 922 and the one-way bearing 7 are key-connected; the one-way bearing 7 and the pressing shaft sleeve 611 of the pressing shaft 61 are key-connected.

[0039] Figure 7 The cross-sectional view shows the assembly relationship of components such as the worm gear 922 and the one-way bearing 7. In this embodiment, the outer ring 71 of the one-way bearing 7 used has 4 key grooves, and the worm gear 922 and the one-way bearing 7 are key-connected. For the convenience of installation, in this embodiment, the key is directly made integrally with the worm gear, that is, 4 keys are made on the inner hole of the worm gear. Similarly, there is also a key connection between the one-way bearing 7 and the pressing shaft sleeve 611, and the key is made integrally with the pressing shaft sleeve 611. The pressing shaft sleeve 611 is also connected to the pressing shaft 61 through a flat key.

[0040] As the motor drives the worm gear to rotate, and then drives the outer ring of the one-way bearing to rotate. Assume that at this time the outer ring of the one-way bearing rotates along the direction where the rotation of the inner ring is blocked, then the inner ring of the one-way bearing will rotate together with the outer ring, and then drive the pressing shaft sleeve and the pressing shaft to rotate. Let's assume that the rotation direction of the motor at this time is called forward rotation. Assume that the rotation direction of the motor is opposite to the previous situation, then the outer ring of the one-way bearing rotates along the direction where there is no resistance to the inner ring. At this time, the outer ring rotates idly without resistance, the inner ring does not move, and the pressing shaft sleeve and the pressing shaft also do not move. Let's assume that the rotation direction of the motor at this time is called reverse rotation. That is to say, when the motor rotates forward, the pressing shaft rotates, and when the motor rotates in reverse, the pressing shaft does not move.

[0041] Furthermore, when the pressing shaft 61 rotates, it will drive the outer arm to move. Next, the right swing arm assembly will be taken as an example for illustration. The left swing arm assembly is exactly the same.

[0042] Among them, both the left swing arm assembly and the right swing arm assembly include a rubber inner sleeve, a swing arm skeleton, and a housing. Taking the right swing arm as an example, Figure 10 is the exploded view of the right swing arm. The rubber inner sleeve 85 is installed inside the swing arm skeleton 86 and fits against the outer side of the user's massage area during massage. The swing arm skeleton 86 is sleeved on the pressing cam 62 to provide a flexible and moderately forceful touch. The swing arm housing 87 is a decorative part. Both the rubber inner sleeve 85 and the swing arm housing 87 move with the swing arm skeleton 86. Among them, the pressing cam 62 has two cylindrical surfaces and corresponding axes. One horizontal axis coincides with the axis of the pressing shaft, and there is a certain inclination angle between the other inclined axis and the pressing shaft; when the pressing cam rotates around the pressing shaft and the horizontal axis, the trajectory of the inclined axis in space forms an imaginary conical surface, thereby driving the left swing arm assembly and the right swing arm assembly to perform a yawing motion. There is a clearance fit between the hole of the swing arm skeleton and the inclined cylindrical surface of the pressing cam, and they can rotate relative to each other with coincident axes. And one end face of the swing arm skeleton is in contact with one end face of the pressing cam perpendicular to the inclined axis, and there is a clearance allowing movement.

[0043] According to relevant mechanism theory, it can be proved that when the pressing shaft 61 rotates around its axis, the swing arm skeleton 86 has two degrees of freedom and its motion is not yet determined. That is, on the one hand, its axis can move on a conical surface, and on the other hand, the swing arm skeleton can rotate around its own axis. So a chute is provided on the bottom plate, and a cylindrical surface, that is, a limit rod 84, extends from the swing arm skeleton and slides in the limit groove 11. In this way, it is equivalent to adding a planar pair, restricting the degree of freedom of the swing arm skeleton to rotate around its own axis. Thus, the motion of the swing arm skeleton is determined. Specifically, limit grooves 11 are provided on both sides of the bottom plate, and a limit rod 84 is provided on the swing arm skeleton 86. The limit rod 84 is slidably arranged in the limit groove 11 to restrict the degree of freedom of the swing arm skeleton 86 to rotate around its own axis.

[0044] Figure 9 The two extreme positions of the outer arm movement have been shown. As the pressing shaft rotates, the movement of the outer arm always swings back and forth between these two extreme positions. The initial position of the outer arm is the outer extreme position. The movement of the outer arm has a return property, that is, after moving to one extreme position, the outer arm will turn and make a return movement to the other extreme position. Using this property, the outer arm can be both clamped inward and self-loosened and reset under the condition that the pressing shaft movement does not need to change direction.

[0045] As previously mentioned, the pressing shaft rotates only when the motor rotates forward, and remains stationary when rotating in reverse. Therefore, the left swing arm assembly and the right swing arm assembly driven by the pressing shaft also move only when the motor rotates forward and stop moving when rotating in reverse. Therefore, if the motor is first rotated forward to cause both the left swing arm assembly and the right swing arm assembly to move from the outer limit position and reach the inner limit position, and then the motor direction is changed to reverse, the two side swing arm assemblies can be kept clamped while the motor is still working and the middle massage member is still kneading. When it is necessary to release the two side swing arm assemblies, the motor direction can be changed back to forward rotation.

[0046] Therefore, a corresponding detection mechanism needs to be provided on the lower limb massage mechanism to apply control to the motor when the two side swing arm assemblies are exactly at the inner and outer limit positions.

[0047] Further, in an example, the lower limb massage mechanism further includes a Hall sensor 12 and a magnet 13. The magnet 13 is fixed on the pressing shaft 61 through a magnet holder 14 and rotates together with the pressing shaft 61. The Hall sensor 12 is arranged on the bearing seat 63.

[0048] Specifically, in this embodiment, a Hall sensor is used for position detection, as shown in Figure 12 、 13 、15. The Hall sensor works based on the Hall effect principle and can detect changes in the surrounding magnetic field. To save space, in this embodiment, the Hall sensor is installed on the bearing seat. The magnet holder is fixed on the pressing shaft and rotates with the pressing shaft. A small magnet is installed at one end of the magnet holder. When the pressing shaft moves to the position where both the left swing arm assembly and the right swing arm assembly are at the inner limit position, the position of the magnet is exactly opposite to the first Hall sensor, and the first Hall sensor emits a signal; when the pressing shaft moves to the position where both the left swing arm assembly and the right swing arm assembly are at the outer limit position, the position of the magnet is exactly opposite to the second Hall sensor, and the second Hall sensor emits a signal. The control system can control the operation of the motor according to the signals of the first Hall sensor and the second Hall sensor.

[0049] Further, in an example, it further includes a control device (not shown in the figure). The control device is used to control the driving device to work, and according to the detection signal of the Hall sensor, when the outer arm swings to the inner limit position, control the driving device to change direction to clamp the user's massage part and keep it stationary, and the middle massage member performs eccentric kneading massage.

[0050] Further, in one example, to enrich the massage techniques, the lower limb massage mechanism further includes a massage roller 8. The massage roller 8 is sleeved on the drive shaft 2 and is located between the outer arm and the middle massage member. When the drive shaft rotates, the massage roller drives the user for rolling massage. Specifically, when the motor rotates forward, the turbine drives the outer ring of the one-way bearing to rotate, and the outer ring of the one-way bearing drives the inner ring of the one-way bearing to rotate, thereby driving the pressing shaft and the drive shaft to rotate simultaneously, so that the left swing arm assembly and the right swing arm assembly achieve swing motion driven by the pressing shaft, the middle massage member achieves eccentric rubbing motion driven by the drive shaft, and the massage roller achieves rolling motion. When the motor rotates in reverse, the turbine drives the outer ring of the one-way bearing to rotate, and the inner ring of the one-way bearing does not move. Thus, the pressing shaft does not move, and the drive shaft rotates, so that the left swing arm assembly and the right swing arm assembly do not move, the middle massage member achieves eccentric rubbing motion driven by the drive shaft, and the massage roller achieves rolling motion. When massaging the lower leg, the back side of the user's lower leg should just contact the massage roller. Then the rotation of the massage roller will play a role in massaging the muscles on the back side of the lower leg. The rotation of the eccentric wheel will drive the middle massage member to perform eccentric rubbing motion. It can also massage the user's feet and soles of the feet.

[0051] Using the working principle mentioned in the foregoing lower limb massage mechanism, the following massage techniques can be achieved:

[0052] First, when the motor rotates forward, the left swing arm assembly and the right swing arm assembly clamp the outer side of the lower leg from the outside to the inside. When the left swing arm assembly and the right swing arm assembly reach the inner limit position, the first Hall sensor emits a signal, and the control system makes the motor rotate in reverse. The left swing arm assembly and the right swing arm assembly stop moving and maintain the posture of clamping the lower leg. At this time, the massage roller and the middle massage member massage the back side and the inner side of the lower leg respectively, and massage is performed in this state. When the massage work is over, the motor direction is changed back to forward rotation, so the left swing arm assembly and the right swing arm assembly loosen the lower leg and reset to the outer limit position. When the left swing arm assembly and the right swing arm assembly reach the outer limit position, the second Hall sensor emits a signal, and the control device cuts off the power supply of the motor, and the massage stops. Of course, the motor can also rotate forward all the time, the left swing arm assembly and the right swing arm assembly perform clamping and rubbing massage on the user, the middle massage member performs rubbing massage, and the massage roller performs rolling massage.

[0053] It should also be noted that in order to accommodate different leg thicknesses of users, there may be a situation where people with thick legs feel pain due to being clamped too tightly by the left swing arm assembly and the right swing arm assembly, or people with thin legs feel that the clamping degree is not enough. Massage airbags can be provided on the left swing arm assembly, the right swing arm assembly and the middle massage member, and the massage airbags and air pressure sensors are used for adjustment. In this way, when the left swing arm assembly and the right swing arm assembly are clamped, an appropriate space slightly larger than the average leg thickness of the user population is reserved between the swing arms and the middle massage member, and the massage airbag pads between the calf and the swing arm or the middle massage member to play a filling role. A pressure sensor can be provided on the massage airbag, and the control device adjusts according to the air pressure feedback by the pressure sensor, so that the pressure of the massage airbag always maintains within a reasonable range. Therefore, for users with thick legs, the expansion amplitude of the massage airbag is small when the two side swing arms are clamped, and the calf will not be overly squeezed; on the contrary, for users with thin legs, the expansion amplitude of the massage airbag is large when the two side swing arms are clamped, compensating for the gap. In short, through air pressure adjustment, the clamping feeling received by the user's legs is always basically the same.

[0054] The present invention can complete a variety of massage actions with one motor. Different massage actions are executed when the motor rotates forward and backward, achieving the solution of relatively complex problems at a relatively low cost.

[0055] The present invention can simultaneously massage the muscles on the inner, outer and posterior sides of the calf, with a comprehensive massage feeling and bringing a more comfortable massage experience.

[0056] The two massage actions of the swing arm pinching and kneading and the kneading housing kneading of the present invention are visually dynamic, with a unique appearance and a strong sense of technology, which is conducive to being favored by consumers.

[0057] Furthermore, an embodiment of the present invention further provides a massage chair, which includes the above-mentioned lower limb massage mechanism, and also includes a chair frame. A guide rail is provided on the chair frame, and a reciprocating massage mechanism is provided on the guide rail. A massage swing arm is provided on the massage mechanism, and the massage swing arm can extend in a direction away from the massage mechanism; the lower limb massage mechanism is arranged at the front end of the chair frame and can massage the user alone or cooperate with the massage mechanism to perform stretching massage on the user;

[0058] It also includes a control mechanism, and the control mechanism controls the movement of the massage mechanism and the lower limb massage mechanism.

[0059] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted to include the preferred embodiments as well as all changes and modifications falling within the scope of the present application.

[0060] Obviously, those skilled in the art can make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to cover these changes and modifications.

Claims

1. A lower limb massage mechanism for massaging a user's lower limbs, characterized in that: It includes a bottom plate, a driving shaft, a shaft sleeve, a middle massage piece, a swing rod and an outer arm; the bottom plate is arranged close to the lower limbs of the user, and the driving shaft is rotatably arranged on the bottom plate; The middle massage piece and the outer arms are arranged at intervals on the bottom plate and are located on both sides of the user's lower limbs. An eccentric cam is fixed on the driving shaft. The shaft sleeve is sleeved on the outer peripheral surface of the eccentric cam and can rotate relative to the eccentric cam. The shaft sleeve is fixed on one end of the middle massage piece. One end of the swing rod is hinged to the bottom plate, and the other end of the swing rod is hinged to a position on the middle massage element away from the shaft sleeve; When the driving shaft rotates, the eccentric cam drives the middle massage part to move through the sleeve, and the swing rod swings synchronously under the drive of the middle massage part to limit the movement range of the middle massage part. The middle massage part cooperates with the outer arm to massage the user's lower limbs.

2. The lower limb massage mechanism according to claim 1, characterized in that: The middle massage piece and the outer arms are provided with air bags, which are used to massage the lower limbs.

3. The lower limb massage mechanism according to claim 1, characterized in that: It also includes a support rod, one end of which is fixed to the bottom plate, the other end of which is arranged away from the shaft sleeve, and one end of the swing rod is hinged to the other end of the support rod.

4. The lower limb massage mechanism according to claim 1, characterized in that: It also includes a pressing drive mechanism, wherein the outer arm is movably connected to the base plate, and the pressing drive mechanism drives the outer arm to move to press the user's lower limbs.

5. The lower limb massage mechanism according to claim 4, characterized in that: The pressing drive mechanism includes a pressing shaft, which is arranged on the base plate through a bearing seat. A through hole is provided in the driving shaft, and a one-way bearing is provided in the through hole. The pressing shaft extends into the through hole and is connected to the driving shaft through the one-way bearing. When the driving shaft rotates forward, the one-way bearing drives the pressing shaft to rotate; when the driving shaft rotates reversely, the one-way bearing does not drive the pressing shaft to rotate.

6. The lower limb massage mechanism according to claim 5, characterized in that: A pressing cam is provided on the pressing shaft, a sleeve hole and a limiting rod are provided on the outer arm, a limiting groove is provided on the base, the central axis of the pressing cam is inclined relative to the central axis of the pressing shaft, the outer arm is sleeved on the pressing cam through the sleeve hole, and the limiting rod is inserted into the limiting groove; when the pressing shaft rotates, the pressing cam drives the outer arm to swing along the limiting groove through the sleeve hole so as to press the lower limbs.

7. The lower limb massage mechanism according to claim 5, characterized in that: It also includes a driving component, which drives the driving shaft to rotate. The driving component includes a motor and a motor housing. The outer ring of the one-way bearing has a plurality of key slots, which are key-connected to the inner side of the turbine in the motor housing. The one-way bearing and the pressing sleeve arranged on the pressing shaft are key-connected.

8. The lower limb massage mechanism according to claim 5, characterized in that: It also includes a Hall sensor and a magnet. The magnet is fixed on the pressing shaft through a magnet frame and rotates with the pressing shaft. The Hall sensor is arranged on the bearing seat.

9. The lower limb massage mechanism according to claim 8, characterized in that: It also includes a control device, which is used to control the operation of the driving device and, based on the detection signal of the Hall sensor, controls the driving device to reverse when the outer arm swings to the inner limit position, so as to clamp the massage part of the user and keep it stationary, and the middle massage part performs eccentric kneading massage.

10. The lower limb massage mechanism according to claim 1, characterized in that: It also includes a massage roller, which is sleeved on the driving shaft and located between the outer arm and the middle massage part; the driving shaft rotates to drive the massage roller to perform rolling massage on the user.

11. A massage chair, characterized in that: The lower limb massage mechanism comprises the lower limb massage mechanism as claimed in claims 1 to 10, and further comprises a chair frame, wherein a guide rail is arranged on the chair frame, a reciprocating massage movement is arranged on the guide rail, a massage swing arm is arranged on the massage movement, and the massage swing arm can extend in a direction away from the massage movement; the lower limb massage mechanism is arranged at the front end of the chair frame, and can massage the user alone, or can cooperate with the massage movement to perform stretching massage on the user; It also includes a control mechanism, which controls the movement of the massage movement and the lower limb massage mechanism.

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