A hardness-adjustable flexible massage wheel and a double-wheel massage mechanism thereof

Abstract

The present application relates to the technical field of ergonomic mechanical massage equipment, more particularly to a hardness-adjustable flexible massage wheel and a double-wheel massage mechanism thereof, comprising an air bag wheel set, a connecting piece, a pressure sensor and an air pipe, one end of the connecting piece penetrates into the air bag wheel set and is rotationally connected with the air bag wheel set, the other end of the connecting piece is fixedly connected with the air pipe, a first air passage is arranged in the connecting piece, the first air passage is in communication with the air bag wheel set and the air pipe, the pressure sensor is located in the connecting piece or the air bag wheel set and has one end extending outward and being electrically connected with the air pump, and the pressure sensor is used for detecting the pressure in the first air passage or the air bag wheel set. The present application can realize the hardness-adjustable of the massage wheel at low cost and reduce the stiffness of massage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ergonomic mechanical massage equipment, and more particularly to a hardness-adjustable flexible massage wheel and a double-wheel massage mechanism thereof. BACKGROUND

[0002] Massage chairs are used to massage by the rolling force and mechanical force. The core components of the massage chair mainly include the core, guide rail, motor, material, etc. The quality of a massage chair mainly depends on the quality of the core. The cores on the market are mainly 2D and 3D cores. The 2D core is the first generation of core, and the massage head of the massage chair equipped with this core can only move up and down and left and right, which is a 2D plane movement. This core can not well fit the human back curve and the massage is relatively harsh. The 3D core is the mainstream configuration of the massage chair, and the massage head can move up and down, left and right, and forward and backward. The forward and backward movement is realized by a telescopic motor. Such a core moves in three dimensions, which can fit the human back curve. At present, the massage wheels on the massage core in the product market are almost made of rubber and silicone as the material, and the rolling of the wheels is driven by the control of the massage core, so as to realize the effect of pressing or other massage on the human body. Limited by the material properties and structure of the massage wheel, there are still problems such as lack of humanization of massage mode and harsh massage force.

[0003] A massage wheel with force sensing is disclosed in the prior art. The massage wheel includes a wheel shaft, a flexible outer wheel, and a force sensing assembly. The force sensing assembly includes a flexible tube, a liquid metal, a conductive part, and a circuit board. The liquid metal is stored in the flexible tube. One end of the conductive part is sealed into the flexible tube and forms an electrical conduction with the liquid metal. The other end is electrically connected with the circuit board. The flexible tube is arranged in the outer wheel and extends along the circumference of the outer wheel, so that when the outer wheel is subjected to an external load, the flexible tube and the liquid metal therein are deformed. When the liquid metal is deformed, the resistance changes. The circuit board collects the resistance of the liquid metal and processes and outputs an electrical signal matched with the resistance and capable of feeding back the size of the external load. This prior art improves the problem of massage harshness by the deformation of the liquid metal. However, the cost of the liquid metal is extremely high in actual application, and the leakage of the liquid metal will also harm the human body.

[0004] A new type of massage core is disclosed in the prior art. The massage wheel is a flexible wheel with a sealed cavity. A fluid and a fluid pressure detection device are arranged in the sealed cavity. The fluid pressure detection device is electrically connected with a control assembly. The massage force applied to the human body by the massage wheel is monitored in real time by the built-in fluid pressure detection device, and the massage force is controlled and adjusted by the control assembly. This prior art directly adjusts the massage force by controlling the relevant mechanical structure through the control assembly, and the massage force is inevitably harsh and unnatural during the massage process. SUMMARY

[0005] The present application aims to overcome the problem that the massage wheel in the prior art fails to realize adjustable hardness of the wheel at low cost, resulting in rigidity of the massage, and to provide a flexible massage wheel with adjustable hardness, so as to solve the problem of unadjustable hardness of the massage wheel during massage and reduce rigidity.

[0006] To solve the above technical problems, the present application adopts the technical scheme of:

[0007] The present application provides a flexible massage wheel with adjustable hardness, which comprises a gas bag wheel set, a connecting piece, a pressure sensor and a gas pipe. One end of the connecting piece penetrates into the gas bag wheel set and is rotationally connected with the gas bag wheel set, and the other end is fixedly connected with the gas pipe. A first gas channel is arranged in the connecting piece and communicates the gas bag wheel set with the gas pipe. The pressure sensor is arranged in the connecting piece or the gas bag wheel set and has one end extending outward and electrically connected with a gas pump. The pressure sensor is used for detecting the pressure in the first gas channel or the gas bag wheel set.

[0008] During the working process of the above scheme, the massage wheel is installed at a massage wheel installation position of a massage chair, and the circuit of the gas pressure sensor and the gas circuit of the gas pipe are connected to a pressurizing device of the massage chair. A part of gas is filled in advance to make the gas bag wheel set have a relatively high internal gas pressure. When the massage wheel contacts with a human body part, the gas bag wheel set is subjected to an increased external pressure, and the internal gas pressure is increased. After the pressure sensor detects the increased gas pressure, a feedback signal is generated to reduce the gas pressure at the end of the gas pipe to make the gas flow back to the gas pipe through the first gas channel of the connecting piece to be further released, so as to reduce the gas pressure of the gas bag wheel set and the hardness of the gas bag wheel. The contact area between the cortex skin of the gas bag wheel and the human body part is increased, and the gas bag wheel is further fitted to the human body part. When the massage wheel is relatively far away from the human body part, the gas bag wheel set is subjected to a reduced external pressure, and the internal volume is increased, so that the gas pressure is reduced. After the pressure sensor detects the reduced gas pressure, a feedback signal is generated to increase the gas pressure at the end of the gas pipe to make the gas enter the gas bag wheel set through the first gas channel of the connecting piece, so as to increase the gas pressure of the gas bag wheel set. The gas bag is expanded by the gas pressure to be further fitted to the human body. The gas bag wheel set can rotate relative to the connecting piece. When the outer surface of the gas bag wheel set contacts with the human body part, the massage movement will cause a relative movement between the human body part and the massage wheel to generate friction therebetween. When the human body part and the gas bag wheel set rub against each other, the friction will drive the gas bag wheel set to rotate, so as to reduce the rigidity and discomfort of the massage wheel to the human body. Meanwhile, the pressure sensor controls the gas pressure in the gas bag wheel set through the feedback signal to realize adjustable hardness of the massage wheel. The two cooperate to realize adjustable hardness of the wheel and reduce the rigidity of the massage.

[0009] Further, the air bag wheel set comprises an inner hub and an outer air bag, the inner hub is sealingly connected with the outer air bag, the inner hub is provided with a second air channel in the radial direction, the inner hub is provided with a shaft hole in the center, the connecting piece is inserted into the shaft hole, and the second air channel is connected with the outer air bag and the first air channel at both ends.

[0010] Further, the second air channel comprises a cavity in the inner hub and a plurality of air channel holes connected to the outer surface of the inner hub, and the air channel holes are connected with the outer air bag and the cavity; the air channel holes on the outer surface of the inner hub are uniformly distributed on the outer surface of the inner hub, so that the gas can enter the outer air bag uniformly, and since the air bag wheel set can rotate relative to the connecting piece, the second air channel is provided as a cavity structure in the inner hub, and no matter how many degrees the inner hub rotates, the gas in the first air channel can enter the outer air bag through the second air channel.

[0011] Further, a plurality of first sealing rings are sleeved on the connecting piece, and the first sealing rings are located at both ends of the connection between the first air channel and the second air channel; the first sealing ring is installed on the connecting piece first, and a shallow sealing member installation groove should be opened on the installation position of the connecting piece, and a corresponding position of the inner hub is also provided with a shallow installation groove, so that the connecting piece can be installed, and since the air bag wheel set can rotate relative to the connecting piece, the first sealing member has a sealing effect under rotary motion.

[0012] Further, a gas nozzle is arranged on the outer wall of the connecting piece away from the air bag wheel set, one end of the gas nozzle is connected to the first air channel, and the other end is fixedly connected with the air pipe; the arrangement of the gas nozzle can facilitate the installation of the air pipe.

[0013] Further, a second sealing ring is arranged between the gas nozzle and the air pipe for sealing; the arrangement of the second sealing ring can avoid gas leakage at this position during inflation and deflation between the gas nozzle and the air pipe.

[0014] A double-wheel type massage mechanism comprises a shell, a driving device installed in the shell, two groups of the above-mentioned flexible massage wheels with adjustable hardness, and an air pump, the driving device is connected with the connecting pieces of the two groups of air bag wheel sets and drives the two groups of air bag wheel sets to move closer to or away from each other, the air pump is electrically connected with the pressure sensor, and the air pipes are connected with the air pump; the air bag wheel sets moving closer to or away from each other refers to the simultaneous up-down swinging action of the two air bag wheel sets, the driving device drives the air bag wheel sets to swing upward or downward simultaneously, when the two air bag wheel sets swing upward simultaneously, the outer air bags of the air bag wheel sets contact the human body parts to realize the "pinching" massage effect, and when the two air bag wheel sets swing downward simultaneously, the outer air bags of the air bag wheel sets contact the human body parts to realize the "stretching" massage effect.

[0015] Further, the driving device comprises a driving assembly and a worm connected with the output end of the driving assembly, a worm wheel is arranged at the end of the connecting piece away from the air bag wheel set, the worm is installed at the center in the shell and rotationally connected with the shell at both ends, the two sides of the shell are open, the worm wheel enters the shell through the opening of the shell and is engaged with the worm; the worm wheel is symmetrically arranged at both sides of the worm, the worm wheel is engaged with the worm, the worm is the driving part, the worm wheel is the driven part, the forward rotation or reverse rotation of the worm drives the clockwise or counterclockwise rotation of the worm wheel, further drives the rotation of the whole connecting piece, and the clockwise or counterclockwise rotation of the worm wheel is alternately driven by the forward rotation or reverse rotation of the worm, so that the up-down swing of the whole connecting piece is realized.

[0016] Further, the worm wheel is integrally connected with the connecting piece; the connecting piece is specifically a cross rod integrally connected with the worm wheel, the worm wheel can be machined first, and then the cross rod is welded on the worm wheel, or the integrally formed connecting piece is directly machined on the blank material, the first air channel is arranged in the cross rod of the connecting piece, and the cross rod and the worm wheel are integrally connected in the mode that the tooth surface of the worm wheel is a toothless structure and the worm wheel becomes a gear structure similar to an incomplete gear, the toothless position is fixedly connected with the cross rod, so that the whole cross rod is integrally connected with the worm wheel.

[0017] Further, the driving assembly comprises a shaft coupling and a motor, the shaft coupling is installed at the bottom end in the shell and fixedly connected with the bottom end of the worm at one end, and the motor is installed at the bottom end outside the shell, the output shaft of the motor penetrates through the bottom of the shell and fixedly connected with the other end of the shaft coupling; the forward rotation or reverse rotation of the worm needs a power source, the forward rotation or reverse rotation motor is installed at the bottom of the shell to drive the worm, so that the space structure is more compact.

[0018] Compared with the prior art, the beneficial effects of the present application are:

[0019] 1. One end of the connecting piece penetrates into the air bag wheel set and is rotationally connected with the air bag wheel set, the other end is fixedly connected with the air pipe, the first air channel is arranged in the connecting piece, the first air channel communicates the air bag wheel set with the air pipe, and the pressure sensor is arranged in the connecting piece or the air bag wheel set; when the human body part and the air bag wheel set rub against each other, the friction force drives the air bag wheel set to rotate, reduces the massage hardness and discomfort brought to the human body by the friction; meanwhile, the air pressure sensor controls the air pressure in the air bag wheel set through the feedback signal to realize the hardness adjustment of the massage wheel, realizes the hardness adjustment of the wheel in the massage process, and reduces the massage hardness.

[0020] 2、Two groups of hardness adjustable flexible massage wheels are symmetrically arranged about the worm, the worm gears are engaged with the worm at both ends of the worm, when the worm gears at both sides rotate forward or reversely, the two worm gears can drive the horizontal rods at both sides upward or downward respectively, realizing the massage effect of "pinching" and "stretching", improving the comfort of massage and reducing the stiffness. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a perspective view of a hardness adjustable flexible massage wheel.

[0022] Figure 2 It is a sectional view of a hardness adjustable flexible massage wheel.

[0023] Figure 3 It is a perspective view of an inner hub of a hardness adjustable flexible massage wheel.

[0024] Figure 4 It is a sectional view of an inner hub of a hardness adjustable flexible massage wheel.

[0025] Figure 5 It is a perspective view of a double-wheel type massage mechanism.

[0026] Figure 6 It is a sectional view of a double-wheel type massage mechanism.

[0027] In the drawings: 1, air bag wheel group; 2, connecting piece; 3, pressure sensor; 4, air pipe; 201, first air channel; 101, inner hub; 102, outer air bag; 1011, second air channel; 103, shaft hole; 1012, cavity; 1013, air channel hole; 5, first sealing ring; 203, air nozzle; 6, second sealing ring; 7, shell; 8, driving device; 801, driving assembly; 802, worm; 202, worm gear; 8011, shaft coupling; 8012, motor. DETAILED DESCRIPTION

[0028] The application will be further described below in conjunction with specific embodiments. Among them, the drawings are only used for exemplary description, and the representation is only a schematic diagram, not a physical diagram, and cannot be understood as a limitation on the patent; in order to better illustrate the embodiments of the application, some components of the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it can be understood that some well-known structures and their descriptions in the drawings can be omitted.

[0029] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it is understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0030] Embodiment 1

[0031] The present embodiment is a first embodiment of a flexible massage wheel with adjustable hardness, as shown in Figures 1 to 5 Fig. 1, which comprises an air bag wheel set 1, a connecting piece 2, a pressure sensor 3 and an air pipe 4, one end of the connecting piece 2 penetrates into the inside of the air bag wheel set 1 and is rotationally connected with the air bag wheel set 1, the other end is fixedly connected with the air pipe 4, a first air passage 201 is arranged in the connecting piece 2, the first air passage 201 communicates the air bag wheel set 1 with the air pipe 4, the pressure sensor 3 is located in the connecting piece 2 or the air bag wheel set 1 and one end thereof extends outward and is used for electrical connection with the air pump, the pressure sensor 3 is used for detecting the pressure in the first air passage 201 or the air bag wheel set 1.

[0032] Specifically, the air bag wheel set 1 comprises an inner hub 101 and an outer air bag 102, the inner hub 101 is sealingly connected with the outer air bag 102, a second air passage 1011 is arranged in the inner hub 101 in the radial direction, a shaft hole 103 is arranged at the center of the inner hub 101, the connecting piece 2 penetrates and is inserted into the shaft hole 103, the two ends of the second air passage 1011 respectively communicate with the outer air bag 102 and the first air passage 201; the connecting piece 2 is rotationally connected with the inner hub 101, bearings should be installed at the two ends of the connecting piece 2.

[0033] Specifically, the second air passage 1011 comprises a cavity 1012 located in the inner hub 101 and a plurality of air passage holes 1013 communicating to the outer surface of the inner hub 101, the air passage holes 1013 communicate the outer air bag 102 with the cavity 1012; the air passage holes on the outer surface of the inner hub 101 are uniformly distributed on the outer surface of the inner hub 101, which facilitates uniform entry of gas into the outer air bag 102, since the air bag wheel set 1 can rotate relative to the connecting piece 2, the second air passage 1011 is arranged as a cavity 1012 structure in the inner hub 101, no matter how many degrees the inner hub 101 rotates, the gas in the first air passage 201 can enter the outer air bag 102 through the second air passage 1011.

[0034] Specifically, the connecting piece 2 is sleeved with a plurality of first sealing rings 5, which are located at both ends of the junction of the first air channel 201 and the second air channel 1011. The first sealing rings 5 are installed on the connecting piece 2 first. The installation position of the connecting piece 2 should be provided with a relatively shallow sealing member installation groove, and the corresponding position of the inner hub 101 is also provided with a relatively shallow installation groove, so as to facilitate the installation of the connecting piece 2. Since the air bag wheel set 1 is rotatable relative to the connecting piece 2, the first sealing member has a sealing effect under rotary motion.

[0035] Specifically, the outer wall of the end of the connecting piece 2 away from the air bag wheel set 1 is provided with an air nozzle 203. One end of the air nozzle 203 is communicated to the first air channel 201, and the other end is fixedly connected with the air pipe 4. The air nozzle 203 can facilitate the installation of the air pipe 4.

[0036] Specifically, the air nozzle 203 and the air pipe 4 are sealed by a second sealing ring 6. The second sealing ring 6 can prevent gas leakage between the air nozzle 203 and the air pipe 4 during inflation and deflation.

[0037] The working principle of the hardness-adjustable flexible massage wheel of the embodiment is as follows:

[0038] When the massage wheel contacts the human body part, the air bag wheel set 1 is subjected to increased external pressure, the internal air pressure increases, the air pressure sensor detects the increase in air pressure, and a feedback signal reduces the air pressure at the end of the air pipe 4 to make the gas flow back to the air nozzle 203 through the first air channel 201 of the connecting piece 2, and then be further released through the air pipe 4, so that the air pressure of the air bag wheel set 1 decreases, the hardness of the air bag wheel decreases, the contact area between the cortex outer skin of the air bag wheel and the human body part increases, and the air bag wheel further fits the human body part. When the massage wheel is relatively far away from the human body part, the air bag wheel set 1 is subjected to reduced external pressure, the internal volume increases, and the air pressure decreases. After the air pressure sensor detects the decrease in air pressure, a feedback signal increases the air pressure at the end of the air pipe 4 to make the gas enter the air bag wheel set 1 through the first air channel 201 of the connecting piece 2, so that the air pressure of the air bag wheel set 1 increases, the air bag is extruded to expand, and the air bag further fits the human body. The air bag wheel set 1 can rotate relative to the connecting piece 2. When the outer surface of the air bag wheel set 1 contacts the human body part, the massage motion will cause a relative motion between the human body part and the massage wheel, and friction is generated between them. When the human body part and the air bag wheel set 1 rub against each other, the friction will drive the air bag wheel set 1 to rotate.

[0039] The air pressure sensor of the air bag wheel set 1 controls the air pressure in the air bag wheel set 1 through a feedback signal to realize the hardness adjustment of the massage wheel. The air bag wheel set 1 is rotationally connected with the connecting piece 2, and the air bag wheel set 1 can be passively rotated on the human body part. The two cooperate to realize the hardness adjustment of the wheel, and reduce the stiffness of the massage.

[0040] Embodiment 2

[0041] This embodiment is a first embodiment of a dual-wheel massage mechanism, such as... Figures 5 to 6 As shown, the device includes a housing 7 and a drive unit 8 installed inside the housing 7, as well as two sets of the aforementioned adjustable-hardness flexible massage rollers and an air pump. The drive unit 8 is connected to the connectors 2 connecting the two sets of airbag roller sets 1 and drives the two sets of airbag roller sets 1 to move closer or further apart. The air pump is electrically connected to the pressure sensor 3, and the air pipes 4 are all connected to the air pump. Moving closer or further apart means that the two sets of airbag roller sets 1 swing up and down simultaneously. The drive unit 8 drives the airbag roller sets 1 to swing up or down simultaneously. When the two sets of airbag roller sets 1 swing up simultaneously, the outer airbag 102 of the airbag roller set 1 contacts the human body part to achieve a "pinching" massage effect. When the two sets of airbag roller sets 1 swing down simultaneously, the outer airbag 102 of the airbag roller set 1 contacts the human body part to achieve a "supporting" massage effect.

[0042] Specifically, the drive device 8 includes a drive assembly 801 and a worm gear 802 connected to the output end of the drive assembly 801. The connecting piece 2 is provided with a worm wheel 202 at the end away from the airbag wheel assembly 1. The worm gear 802 is installed at the center inside the housing 7, and both ends are rotatably connected to the housing 7. The two sides of the housing 7 are open, and the worm wheel 202 enters the housing 7 through the openings and meshes with the worm gear 802. The worm wheel 202 is symmetrically arranged on both sides of the worm gear 802 and meshes with the worm gear 802. The worm gear 802 is the driving member, and the worm wheel 202 is the driven member. The forward or reverse rotation of the worm gear 802 drives the worm wheel 202 to rotate clockwise or counterclockwise, further causing the entire connecting piece 2 to rotate. At the same time, the alternating forward and reverse rotation of the worm gear 802 drives the worm wheel 202 to rotate clockwise or counterclockwise, realizing the up and down swing of the entire connecting piece 2.

[0043] Specifically, the worm gear 202 is integrally connected to the connecting piece 2. The connecting piece 2 is specifically a crossbar integrally connected to the worm gear 202. During manufacturing, the worm gear 202 can be machined first, and then the crossbar can be welded onto the worm gear 202, or the integrally formed connecting piece 2 can be directly machined from the blank. The first air passage 201 is set inside the crossbar of the connecting piece 2. The way the crossbar is integrally connected to the worm gear 202 can be that the tooth surface of the worm gear 202 has a missing tooth structure, making the worm gear 202 a gear structure similar to an incomplete gear. The missing tooth position is fixedly connected to the crossbar, thereby making the entire crossbar integrally connected to the worm gear 202.

[0044] The working principle of a dual-wheel massage mechanism in this embodiment is as follows:

[0045] The two ends of the worm 802 are symmetrically engaged with the worm gears 202 respectively, and the two worm gears 202 are close to the gear teeth of the worm 802 when the worm 802 rotates forward or reversely, and the gear teeth of the two worm gears 202 have the same movement direction, i.e., up or down, at this time, the horizontal bars fixed to the ends of the worm gears 202 far from the worm 802 also have the same swing direction, i.e., up or down correspondingly, when the two horizontal bars are up, the top ends of the two air bag wheel sets 1 are close to each other and simultaneously contact the human body part to realize the technical effect of “pinching”, when the two horizontal bars are down, the top ends of the two air bag wheel sets 1 are far away from each other and simultaneously contact the human body part to realize the technical effect of “stretching”.

[0046] The beneficial effect of the embodiment is that the driving assembly 801 drives the worm gears 202 to rotate forward or reversely to drive the top ends of the air bag wheel sets 1 to be close to or far away from each other, so as to realize the massage effects of “pinching” and “stretching”, improve the comfort of massage and reduce the stiffness.

[0047] Embodiment 3

[0048] The embodiment is a second embodiment of a double-wheel type massage mechanism, as shown in Figures 5 to 6 The difference between the embodiment and the embodiment 2 is that:

[0049] Specifically, the driving assembly 801 includes a shaft coupling 8011 and a motor 8012, the shaft coupling 8011 is installed at the bottom end inside the shell 7 and is fixedly connected with the bottom end of the worm 802, the motor 8012 is installed at the bottom end outside the shell 7, the output shaft of the motor 8012 penetrates through the bottom of the shell 7 and is fixedly connected with the other end of the shaft coupling 8011; the forward and reverse rotation of the worm 802 needs a power source, a forward and reverse motor 8012 is installed at the bottom of the shell 7 to drive the worm 802, so that the space structure is more compact.

[0050] The working principle of the embodiment of the double-wheel type massage mechanism is as follows:

[0051] The motor 8012 is started to drive the shaft coupling 8011 to rotate, and then drive the worm 802 to rotate, the forward and reverse rotation of the motor 8012 is controlled by a PLC program or other ways to drive the up and down swing of the air bag wheel set 1, so as to realize the massage effects of “pinching” and “stretching”.

[0052] The beneficial effect of the embodiment is that the motor 8012 is selected as the driving assembly 801, the control of the forward and reverse rotation of the motor 8012 is simpler, the selection cost of the motor 8012 is also low, and the manufacturing cost can be effectively reduced.

[0053] In the specific contents of the above specific embodiments, any combination of technical features can be combined without contradiction, in order to make the description simple, not all possible combinations of the above technical features are described, however, as long as the combination of these technical features does not exist contradiction, it should be considered as the scope of the description.

[0054] Obviously, the above-mentioned embodiments of the present application are only examples for clearly illustrating the present application, but not limitation on the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and also impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the claims of the present application.

Claims

1. A hardness-adjustable flexible massage wheel comprising an air bag wheel set (1), characterized in that, Also include a connecting piece (2), a pressure sensor (3) and a trachea (4), one end of the connecting piece (2) is inserted into the air bag wheel group (1) and is rotatably connected with the air bag wheel group (1), the other end is fixedly connected with the trachea (4), the first air passage (201) is arranged in the connecting piece (2), the first air passage (201) is communicated with the air bag wheel group (1) and the trachea (4), the pressure sensor (3) is located in the connecting piece (2) or the air bag wheel group (1) and one end extends outward and is used for electrically connected with the air pump, the pressure sensor (3) is used for detecting the pressure in the first air passage (201) or the air bag wheel group (1); The air bag wheel group (1) comprises an inner hub (101) and an outer air bag (102), the inner hub (101) is sealingly connected with the outer air bag (102), a second air passage (1011) is arranged in the inner hub (101) in the radial direction, a shaft hole (103) is arranged at the center of the inner hub (101), the connecting piece (2) is inserted into the shaft hole (103), and the two ends of the second air passage (1011) are respectively communicated with the outer air bag (102) and the first air passage (201). The second air passage (1011) comprises a cavity (1012) located in the inner hub (101) and a plurality of air passage holes (1013) communicated to the outer surface of the inner hub (101), and the air passage holes (1013) are communicated with the outer air bag (102) and the cavity (1012). A plurality of first sealing rings (5) are sleeved on the connecting piece (2), and the first sealing rings (5) are located at the two ends of the junction of the first air passage (201) and the second air passage (1011). A gas nozzle (203) is arranged on the outer wall of the end of the connecting piece (2) away from the air bag wheel group (1), one end of the gas nozzle (203) is communicated with the first air passage (201), and the other end is fixedly connected with the trachea (4).

2. The hardness-adjustable flexible massage wheel according to claim 1, wherein, A second sealing ring (6) is arranged between the gas nozzle (203) and the trachea (4) for sealing.

3. A double-wheel type massage mechanism comprising a housing (7) and a driving device (8) installed in the housing (7), characterized in that, Also comprising two groups of the flexible massage wheel with adjustable hardness according to any one of claims 1-2, and an air pump, the driving device (8) is connected with the connecting piece (2) of the air bag wheel group (1) and drives the two groups of air bag wheel groups (1) to move close to or away from each other, the air pump is electrically connected with the pressure sensor (3), and the trachea (4) is connected with the air pump.

4. The dual wheel massaging mechanism according to claim 3, wherein The driving device (8) comprises a driving assembly (801) and a worm (802) connected with the output end of the driving assembly (801), a worm wheel (202) is arranged at the end of the connecting piece (2) away from the air bag wheel group (1), the worm (802) is installed at the center in the shell (7), and both ends are rotatably connected with the shell (7), both sides of the shell (7) are open, the worm wheel (202) enters the shell (7) through the opening of the shell (7) and is engaged with the worm (802).

5. The dual wheel massaging mechanism according to claim 4, wherein The worm wheel (202) is integrally connected with the connecting piece (2).

6. The dual wheel massaging mechanism according to claim 4, wherein The driving assembly (801) comprises a shaft coupling (8011) and a motor (8012). The shaft coupling (8011) is installed at the inner bottom end of the shell (7) and fixedly connected with the bottom end of the worm (802) at one end. The motor (8012) is installed at the bottom end outside the shell (7). The output shaft of the motor (8012) penetrates through the bottom of the shell (7) and is fixedly connected with the other end of the shaft coupling (8011).

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