A back massager

Abstract

The application discloses a back rubbing machine, which comprises a main machine, a swing arm assembly, a torsion mechanism and a gear shifting piece. The swing arm assembly is swingably arranged on the main machine, and the swing arm assembly is rotationally provided with a rubbing piece facing the back of a human body. The torsion mechanism is arranged on the main machine and is connected with the swing arm assembly, and the torsion mechanism comprises a main torsion spring and a gear shifting torsion spring. When the swing arm assembly rotates in a first clockwise direction, the main torsion spring and the gear shifting torsion spring can generate torsion acting on the swing arm assembly. The gear shifting piece is rotationally arranged on the main machine, and the gear shifting piece is used for driving the main torsion spring and the gear shifting torsion spring to jointly act on the swing arm assembly, or the gear shifting piece is used for driving the main torsion spring to separately act on the swing arm assembly. The back rubbing machine with the above structure can increase the pressing space of the back, and the gear shifting piece can be selected to adjust the back rubbing pressure of the rubbing piece acting on the human body according to requirements.

Description

Technical Field

[0001] This invention relates to the field of bathroom equipment technology, and in particular to a back scrubbing machine. Background Technology

[0002] For a long time, whether at home or in a hotel bathroom, people often find it difficult to scrub their backs when showering alone, especially the central area, which is extremely difficult to scrub by themselves. Although there are now some back scrubbing products on the market, these products do not provide variable pressure and have limited space for pressure application, resulting in a poor overall user experience. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a back-rubbing machine, which aims to achieve adjustable back-rubbing pressure and increase the pressing range of the back, thereby improving the user experience.

[0004] According to an embodiment of the present invention, a back-rubbing machine includes: a main unit, a swing arm assembly, a torque mechanism, and a shifting component; the swing arm assembly is oscillatingly disposed on the main unit, and the swing arm assembly is rotatably disposed with a friction element facing the back of the human body; the torque mechanism is disposed on the main unit and linked to the swing arm assembly, the torque mechanism includes a main torsion spring and a shifting torsion spring, and when the swing arm assembly rotates around a first clockwise direction, both the main torsion spring and the shifting torsion spring can generate torque acting on the swing arm assembly; the shifting component is rotatably disposed on the main unit, and the shifting component is used to drive the main torsion spring and the shifting torsion spring to act together on the swing arm assembly, or the shifting component drives the main torsion spring to act alone on the swing arm assembly.

[0005] The back-rubbing machine according to embodiments of the present invention has at least the following beneficial effects: During use, the user's back rests against the friction element for a back-rubbing operation. As the swing arm assembly swings in a clockwise direction under force, the torque of both the main torsion spring and the auxiliary torsion spring changes accordingly with the angle of the swing arm assembly, increasing the range of motion for back pressure application. This allows users to choose the appropriate position and pressure for back-rubbing based on their own experience. Furthermore, the inclusion of a shift mechanism allows users to selectively switch the auxiliary torsion spring, enabling them to actively reduce or increase the torque applied to the swing arm assembly, thereby improving the user experience.

[0006] In some embodiments of the present invention, the torque mechanism includes a main shaft, a fixed wheel, a shift wheel, and a main wheel. The main shaft is fixedly connected to the swing arm assembly. The fixed wheel is fixedly mounted on the main unit. The shift wheel can rotate relative to the main shaft. The main shaft can drive the main wheel to rotate synchronously around the first clockwise direction. The main torsion spring is connected between the main wheel and the fixed wheel. The shift torsion spring is connected between the main wheel and the shift wheel. When the main wheel rotates around the first clockwise direction, the shift wheel has a first state of engaging with the fixed wheel or a second state of rotating synchronously with the main wheel. The shifting component can drive the shift wheel to switch between the first state and the second state.

[0007] In some embodiments of the present invention, the upshift wheel is elastically connected to a first pawl portion, the first pawl portion can be folded or elastically opened by an external force, the fixed wheel is provided with a first latch portion, the first pawl portion cooperates with the first latch portion to make the upshift wheel in the first state, and when the shift member rotates around the first clockwise direction, the shift member can drive the first pawl portion to disengage from the first latch portion, so that the upshift wheel switches to the second state.

[0008] In some embodiments of the present invention, the swing arm assembly has an initial position and a shift position. The direction in which the swing arm assembly rotates from the shift position to the initial position is a first clockwise direction, and the direction in which the swing arm assembly rotates from the initial position to the shift position is a second clockwise direction. The main unit also has a limiting mechanism, which includes a fixing member and a driven wheel respectively sleeved on the main shaft. The fixing member is fixedly mounted on the main unit, and the driven wheel is fixedly connected to the main shaft. The driven wheel is elastically connected to a second pawl portion and a third pawl portion facing opposite directions. Both the second pawl portion and the third pawl portion can be folded or elastically opened by external force. The fixing member has a second locking portion, and the second pawl portion and the second locking portion cooperate to allow the main shaft to stop rotating in the second clockwise direction at the shift position. The main wheel has a third locking portion, and the third pawl portion cooperates with the third locking portion to allow the main shaft to drive the main wheel to rotate synchronously in the first clockwise direction.

[0009] In some embodiments of the present invention, the main wheel is provided with two opposing fourth locking portions, one end of the shift wheel is provided with two opposing fifth locking portions, and a rotational space is formed between two adjacent fifth locking portions to accommodate the fourth locking portions. The main unit is provided with a fixed bracket, the other end of the shift wheel is provided with two opposing ninth locking portions, and the fixed bracket is provided with two opposing sixth locking portions on the side near the shift wheel. A rotational space is formed between two adjacent sixth locking portions to accommodate the ninth locking portions. During the rotation of the main wheel in a second clockwise direction, the fourth locking portions abut against the fifth locking portions, and the ninth locking portions abut against the sixth locking portions, so that the main wheel stops rotating in a second clockwise direction at the shift position.

[0010] In some embodiments of the present invention, the limiting mechanism further includes a first return member, a second return member, and a switching torsion spring disposed on the main shaft. The switching torsion spring is connected between the first return member and the second return member. The second return member can rotate synchronously with the main shaft. The first return member is provided with a first locking portion. The fixing member is elastically connected to a first latching portion that always applies force toward the inside of the main shaft. During the process of the main shaft rotating from the initial position around the second clockwise direction to the shift position, the first locking portion engages with the first latching portion to limit the first return. The first return member is provided with a fourth latch portion. When the main shaft rotates from the initial position to the shift position in the second clockwise direction, the second pawl portion engages with the second latch portion and the fourth latch portion. The main wheel is provided with a second locking portion. During the process of the main wheel rotating in the first clockwise direction from the shift position, the second locking portion pushes the first tongue locking portion to disengage from the first locking portion, so that the first return member rotates in the second clockwise direction under the elastic force of the switching torsion spring and retracts the second pawl portion.

[0011] In some embodiments of the present invention, the limiting mechanism further includes a driving member, which is fixedly connected to the driven wheel to rotate synchronously with the driven wheel. The driving member is elastically connected to a second latch portion that always applies force toward the inside of the main shaft. The second return member is provided with a second engaging portion that engages with the second latch portion. The second return member is provided with a fifth locking portion. When the main shaft rotates from the initial position to the shift position in the second clockwise direction, the third pawl portion engages with the third locking portion and the fifth locking portion. The main wheel is provided with a third locking portion. When the main shaft rotates past the shift position in the second clockwise direction, the third locking portion pushes the second latch portion to disengage from the second engaging portion, so that the second return member rotates in the first clockwise direction under the elastic force of the switching torsion spring and retracts the third pawl portion.

[0012] In some embodiments of the present invention, the host machine is further provided with a reset mechanism, the reset mechanism including a return wheel and a return torsion spring, the return wheel being fixedly connected to the main shaft to rotate synchronously with the main shaft, the return torsion spring being connected between the main wheel and the return wheel, after the main shaft rotates past the shift position in the second clockwise direction, the return torsion spring is reset to drive the main shaft to reset to the initial position in the first clockwise direction.

[0013] In some embodiments of the present invention, the swing arm assembly includes a swing arm plate, a first motor, a rotating assembly, and a fixed bracket. The swing arm plate is fixedly connected to the main shaft to drive the main shaft to rotate synchronously. The first motor is connected to the friction element through the rotating assembly to drive the friction element to rotate. The fixed bracket is fixedly mounted on the main unit. The rotating assembly is rotatably mounted on the swing arm plate. A parallelogram linkage mechanism is connected between the fixed bracket and the rotating assembly. During the swinging process of the swing arm plate, the parallelogram linkage mechanism links with the rotating assembly so that the rotating assembly can drive the friction element to produce a deflection that is always directly opposite the back of the human body.

[0014] In some embodiments of the present invention, the friction member includes a rotating member, a housing, and an elastic member. The housing is provided with a back-rubbing mechanism facing the back of the human body. The rotating assembly is connected to the rotating member. The elastic member is connected between the rotating member and the housing. A guide limiting assembly is provided between the rotating member and the housing. The guide limiting assembly is used to guide the housing to reciprocate along the axial direction of the rotating member under force.

[0015] In some embodiments of the present invention, the back-rubbing machine further includes a fixed frame, the top of which is provided with a wireless charger. A lifting mechanism is provided between the main unit and the fixed frame. The lifting mechanism includes a second motor, a reel, and a rope. The reel is rotatably mounted on the main unit. The second motor drives the reel to wind or unwind the rope to move the main unit up and down to rub the back or move it closer to the wireless charger.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the structure of one embodiment of the back-rubbing machine of the present invention;

[0019] Figure 2 for Figure 1 Internal structure diagram of the embodiment;

[0020] Figure 3 for Figure 2 A structural diagram showing the removal of some parts;

[0021] Figure 4 for Figure 3 An exploded view of the torque mechanism, limit mechanism, and reset mechanism in the diagram;

[0022] Figure 5 for Figure 3 An exploded view of the torque mechanism, limit mechanism, and reset mechanism in the diagram from another perspective;

[0023] Figure 6 for Figure 4 An exploded view of the main wheel, the gear shift wheel, and the fixed bracket.

[0024] Figure 7 for Figure 3 A partial structural diagram of the torque mechanism, limit mechanism, and reset mechanism in the diagram;

[0025] Figure 8 for Figure 7 A schematic diagram of the local structure from another perspective;

[0026] Figure 9 for Figure 7 A partial structural diagram showing the removal of some parts;

[0027] Figure 10 for Figure 3 An exploded view of the swing arm assembly in the diagram;

[0028] Figure 11 for Figure 10 A partial structural diagram of the rotating component and the swing arm component.

[0029] In the diagram: Main unit 100, adjustment knob 101, display screen 102, first mounting bracket 110, second mounting bracket 120, swing arm assembly 200, friction component 210, rotating component 211, locking block 2111, outer shell 212, elastic component 213, back rubbing component 214, swing arm plate 220, shell frame 221, first motor 230, rotating assembly 240, rotating frame 241, output shaft 242, fixed bracket 250, sixth locking part 251, first connecting rod 260, movable rod 270, second connecting rod 280, belt drive mechanism 290, torque mechanism 300, main torsion spring 301, shifting torsion spring 302, main shaft 310, fixed wheel 320, first locking part 321, shifting wheel 330, first pawl part 331, fifth locking part 332, ninth locking part 333, main wheel 340, first locking part 341 Third latching part 342, second latching part 343, third latching part 344, fourth latching part 345, shifting part 400, rotating part 410, shift ring part 420, drive block 421, fixing part 500, second latching part 501, first tongue latching part 502, first return part 510, first locking part 511, fourth latching part 512, seventh latching part 513, driven wheel 520, second pawl part 521, third pawl part 522, second return part 530, second locking part 531, fifth locking part 532, switching torsion spring 540, driving part 550, second tongue locking part 551, eighth locking part 552, return wheel 600, return torsion spring 610, fixing bracket 700, guide rod 701, wireless charger 710, lifting mechanism 800, second motor 810, spool 820, rope 830. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of this invention, it should be understood that the orientation descriptions, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer", indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0032] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] See Figures 1 to 10 A back-rubbing machine includes: a main unit 100, a swing arm assembly 200, a torque mechanism 300, and a shifting component 400; the swing arm assembly 200 is oscillatingly mounted on the main unit 100, and the swing arm assembly 200 is rotatably mounted with a friction element 210 facing the back of the human body; the torque mechanism 300 is mounted on the main unit 100 and linked to the swing arm assembly 200, the torque mechanism 300 includes a main torsion spring 301 and a shifting torsion spring 302, when the swing arm assembly 200 rotates around a first clockwise direction, both the main torsion spring 301 and the shifting torsion spring 302 can generate torque acting on the swing arm assembly 200; the shifting component 400 is rotatably mounted on the main unit 100, and the shifting component 400 is used to drive the main torsion spring 301 and the shifting torsion spring 302 to act together on the swing arm assembly 200, or the shifting component 400 drives the main torsion spring 301 to act alone on the swing arm assembly 200.

[0035] In this back-rubbing machine with the above structure, the user's back rests against the friction element 210 for rubbing. As the swing arm assembly 200 swings in a clockwise direction under force, the torque of the main torsion spring 301 and the additional torsion spring 302 changes accordingly with the angle of the swing arm assembly 200, increasing the range of motion for back pressing. This allows users to choose the appropriate position and pressure for rubbing based on their own experience. The addition of a shifting element 400 allows users to selectively switch the additional torsion spring 302, enabling them to actively reduce or increase the torque applied to the swing arm assembly 200, thereby improving the user experience.

[0036] See Figures 2 to 5In some embodiments of the present invention, the torque mechanism 300 includes a main shaft 310, a fixed wheel 320, a shift wheel 330, and a main wheel 340. The main shaft 310 is fixedly connected to the swing arm assembly 200. The fixed wheel 320 is fixedly mounted on the main unit 100. The shift wheel 330 can rotate relative to the main shaft 310. The main shaft 310 can drive the main wheel 340 to rotate synchronously around a first clockwise direction. The main torsion spring 301 is connected between the main wheel 340 and the fixed wheel 320. The shift torsion spring 302 is connected between the main wheel 340 and the shift wheel 330. When the main wheel 340 rotates around the first clockwise direction, the shift wheel 330 has a first state of engaging with the fixed wheel 320 or a second state of rotating synchronously with the main wheel 340. The shifting component 400 can drive the shift wheel 330 to switch between the first state and the second state.

[0037] Specifically, when the shift wheel 330 is in the first state of engagement with the fixed wheel 320, the main wheel 340 rotates in a first clockwise direction to drive the main torsion spring 301 and the shift wheel torsion spring 302 to rotate. This allows the main torsion spring 301 and the shift wheel torsion spring 302 to jointly generate torque that restricts the rotation of the main shaft 310, thereby allowing the swing arm assembly 200 to exert pressure on the user's back. When the shifter 400 switches the shift wheel 330 to the second state, the shift wheel 330 rotates accordingly with the main wheel 340, causing the torque exerted by the shift wheel 330 on the main shaft 310 to be lost, thus reducing the pressure exerted on the user's back by the swing arm assembly 200. It is understood that the main unit 100 includes a first mounting bracket 110, and the fixed wheel 320 is fixed to the first mounting bracket 110 by bolts.

[0038] See Figures 2 to 5 In some embodiments of the present invention, the shift wheel 330 is elastically connected to a first pawl portion 331, which can be folded or elastically opened by an external force. The fixed wheel 320 is provided with a first latch portion 321, and the first pawl portion 331 cooperates with the first latch portion 321 to make the shift wheel 330 in a first state. When the shift member 400 rotates around a first clockwise direction, the shift member 400 can drive the first pawl portion 331 to disengage from the first latch portion 321, so that the shift wheel 330 switches to a second state.

[0039] Specifically, the shift mechanism 400 includes a rotating part 410 and a shift ring part 420. The rotating part 410 is exposed outside the main unit 100 so that people can operate the shift mechanism 400. The shift ring part 420 is provided with a drive block 421 that can apply force to retract the first pawl part 331 in a first clockwise direction. When the shift wheel 330 is in the first state, the drive block 421 and the first latch part 321 are misaligned along the axial direction of the main shaft 310. The first pawl part 331 elastically opens and engages with the first latch part 321, so that one end of the shift torsion spring 302 is fixed, so that the shift torsion spring 302 can generate corresponding torque under the rotation of the main wheel 340. When the shifting component 400 rotates in the first clockwise direction, the driving block 421 and the first latch 321 overlap along the axial direction of the main shaft 310. This causes the outer side of the first pawl 331 to be pressed and folded by the inner wall of the driving block 421, allowing the first pawl 331 to disengage from the first latch 321. This enables the shift wheel 330 to switch to a second state that allows it to move with the main wheel 340, thereby disabling the torque of the shift torsion spring 302. It should be noted that when the driving block 421 and the first latch 321 overlap along the axial direction of the main shaft 310, the first pawl 331 is in a folded state; when the driving block 421 and the first latch 321 are misaligned along the axial direction of the main shaft 310, the first pawl 331 is in an open state.

[0040] See Figures 2 to 5 In some embodiments of the present invention, the swing arm assembly 200 has an initial position and a shift position. The direction in which the swing arm assembly 200 rotates from the shift position to the initial position is a first clockwise direction, and the direction in which the swing arm assembly 200 rotates from the initial position to the shift position is a second clockwise direction. The main unit 100 is also provided with a limiting mechanism, which includes a fixing member 500 and a driven wheel 520 respectively sleeved on the main shaft 310. The fixing member 500 is fixedly disposed on the main unit 100, and the driven wheel 520 is fixedly connected to the main shaft 310. The driven wheel 520 is elastically connected to a direction facing... Conversely, the second pawl portion 521 and the third pawl portion 522 can be folded or elastically opened by external force. The fixing member 500 is provided with a second latch portion 501. The second pawl portion 521 and the second latch portion 501 cooperate to enable the main shaft 310 to stop rotating from the initial position in the second clockwise direction to the shift position. The main wheel 340 is provided with a third latch portion 342. The third pawl portion 522 cooperates with the third latch portion 342 to enable the main shaft 310 to drive the main wheel 340 to rotate synchronously in the first clockwise direction.

[0041] Specifically, when the user swings the swing arm assembly 200 from its initial position to the shift position in a second clockwise direction, the second pawl 521 elastically opens and engages with the second latch 501, causing the main shaft 310 to stop rotating in the shift position. At this time, the swing arm assembly 200 enters the back-rubbing working state. The user can choose whether to add torque to the shifting torsion spring 302 according to their own needs. Subsequently, the user's back abuts against the friction member 210, causing the main shaft 310 to rotate in a first clockwise direction. The third pawl 522 engages with the third latch 342, causing the main shaft 310 to drive the main wheel 340 to rotate synchronously, thus putting the swing arm assembly 200 in a working state that applies force to the user's back. It can be understood that, taking the bathroom wall where the main unit 100 is installed as a reference plane, the initial position is the 0-degree angle position where the swing arm assembly 200 is parallel to the wall, and the shift position is the position where the swing arm assembly 200 swings from the wall to the maximum angle position away from the wall. In addition, the main unit 100 also includes a second mounting bracket 120, which is provided with a bayonet groove, and the fixing member 500 is provided with a locking strip that engages with the bayonet groove. The locking strip engages with the bayonet groove to restrict the rotation of the fixing member 500.

[0042] See Figure 6 In some embodiments of the present invention, the main wheel 340 is provided with two opposing fourth locking portions 345, and one end of the shift wheel 330 is provided with two opposing fifth locking portions 332. A rotational space is formed between two adjacent fifth locking portions 332 to accommodate the fourth locking portions 345. The main unit 100 is provided with a fixed bracket 250, and the other end of the shift wheel 330 is provided with two opposing ninth locking portions 333. The fixed bracket 250 is provided with two opposing sixth locking portions 251 on the side near the shift wheel 330. A rotational space is formed between two adjacent sixth locking portions 251 to accommodate the ninth locking portions 333. During the rotation of the main wheel 340 in the second clockwise direction, the fourth locking portions 345 abut against the fifth locking portions 332, and the ninth locking portions 333 abut against the sixth locking portions 251, so that the main wheel 340 stops rotating in the second clockwise direction at the shift position. It should be noted that the main wheel 340 is always subjected to torque around the second clockwise direction by the action of the main torsion spring 301 and the shifting torsion spring 302.

[0043] See Figures 2 to 9In some embodiments of the present invention, the limiting mechanism further includes a first return member 510, a second return member 530, and a switching torsion spring 540 disposed on the main shaft 310. The switching torsion spring 540 is connected between the first return member 510 and the second return member 530. The second return member 530 can rotate synchronously with the main shaft 310. The first return member 510 is provided with a first locking part 511. The fixing member 500 is elastically connected to a first latching part 502 that always applies force toward the inside of the main shaft 310. During the process of the main shaft 310 rotating from the initial position to the shift position around the second clockwise direction, the first locking part 511 engages with the first latching part 502 to limit the first return member 510 from rotating around the second clockwise direction. When rotating clockwise, the first return member 510 is provided with a fourth latch 512. When the main shaft 310 rotates from the initial position to the shift position in the second clockwise direction, the second pawl 521 engages with the second latch 501 and the fourth latch 512. The main wheel 340 is provided with a second locking part 343. During the rotation of the main wheel 340 from the shift position to the first clockwise direction, the second locking part 343 pushes the first latch 502 to disengage from the first locking part 511, so that the first return member 510 rotates under the elastic force of the switching torsion spring 540 and retracts the second pawl 521, thereby releasing the restriction that the main shaft 310 rotates to the shift position at the maximum angle in the second clockwise direction.

[0044] Specifically, when the swing arm assembly 200 is in its initial position, the main wheel 340 has a first locking part 341, a first engaging part 511 located between the first locking part 341 and the first latching part 502, and the first latching part 502 and the first engaging part 511 are in a locked state. The fourth locking part 512 and the second locking part 501 overlap along the axial direction of the main shaft 310. During the process of the main shaft 310 rotating from the initial position to the shift position in a second clockwise direction, the first latching part 502 engages with the first engaging part 511 to restrict the first return member 510 from rotating in a second clockwise direction. The second return member 530 rotates with the main shaft 310, causing the switching torsion spring 540 to generate corresponding elastic potential energy. Subsequently, when the spindle 310 rotates to the shift position, the positions of the second latch portion 501 and the fourth latch portion 512 still overlap along the axial direction of the spindle 310, and the second pawl portion 521 elastically opens to engage with the second latch portion 501 and the fourth latch portion 512, thereby restricting the spindle 310 from rotating around the second clockwise direction and stopping at the shift position. When the main shaft 310 rotates clockwise from the shift position, the main wheel 340 rotates, causing the second locking part 343 to push the first latching part 502 away from the first engaging part 511. This causes the first returning member 510 to rotate clockwise under the elastic action of the switching torsion spring 540. Consequently, the positions of the fourth locking part 512 and the second locking part 501 are misaligned along the axial direction of the main shaft 310. This causes the outer side of the second pawl part 521 to be pressed and folded by the inner wall of the first returning member 510, ultimately causing the second pawl part 521 to lose its ability to engage the second locking part 501, thus releasing the restriction on the main shaft 310 to rotate to its maximum angle clockwise to the shift position. It can be understood that the rotation path of the second locking part 343 is offset from the rotation path of the first engaging part 511, and the second locking part 343 can push the first latching part 502 away from its inner side. It should be noted that when the positions of the second latch portion 501 and the fourth latch portion 512 are misaligned along the axial direction of the main shaft 310, the second pawl portion 521 is in a folded state; when the positions of the second latch portion 501 and the fourth latch portion 512 overlap along the axial direction of the main shaft 310, the second pawl portion 521 is in an open state.

[0045] See Figures 2 to 7 as well as Figure 9In some embodiments of the present invention, the limiting mechanism further includes a driving member 550, which is fixedly connected to the driven wheel 520 to rotate synchronously with the driven wheel 520. The driving member 550 is elastically connected to a second latch portion 551 that always applies force toward the inner side of the main shaft 310. The second return member 530 is provided with a second engaging portion 531 that engages with the second latch portion 551. The second return member 530 is provided with a fifth latch portion 532. The main shaft 310 rotates from its initial position around the first... When the gear shift is reached in the second clockwise direction, the third pawl 522 engages with the third latch 342 and the fifth latch 532. The main wheel 340 is provided with a third locking part 344. When the main shaft 310 rotates past the gear shift position in the second clockwise direction, the third locking part 344 pushes the second tongue 551 to disengage from the second locking part 531, so that the second return member 530 rotates in the first clockwise direction under the elastic force of the switching torsion spring 540 and retracts the third pawl 522.

[0046] Specifically, in the initial position, the second latch portion 551 and the second locking portion 531 are engaged, the fifth locking portion 532 and the third locking portion 342 are misaligned along the axial direction of the main shaft 310, and the outer side of the third pawl portion 522 is folded down by the pressure of the inner wall of the main wheel 340. During the rotation of the main shaft 310 from the initial position to the shift position in a second clockwise direction, the second latch portion 551 engages with the second locking portion 531, thereby driving the second return member 530 to rotate with the main shaft 310 in a second clockwise direction. When the main shaft 310 drives the second return member 530 to rotate to the shift position, the positions of the fifth latch 532 and the third latch 342 overlap along the axial direction of the main shaft 310, and the third pawl 522 elastically opens to engage with the third latch 342 and the fifth latch 532, so that the main shaft 310 drives the main wheel 340 to rotate synchronously around the first clockwise direction, thereby causing the swing arm assembly 200 to enter the back-rubbing working state. After the back massage is completed, when the user drives the swing arm assembly 200 to rotate again in the second clockwise direction and pass the shift position, the third locking part 344 pushes the second tongue locking part 551 to disengage from the second locking part 531. This causes the second return member 530 to rotate back to its initial position in the first clockwise direction under the elastic action of the switching torsion spring 540. This causes the positions of the third locking part 342 and the fifth locking part 532 to be misaligned along the main shaft 310 axially. The outer side of the third pawl part 522 is pressed and folded by the inner wall of the second return member 530, causing the third pawl part 522 to lose its ability to engage the third locking part 342. As a result, the main wheel 340 loses its ability to rotate synchronously with the main shaft 310 in the first clockwise direction, and consequently, the torque of the main torsion spring 301 and the shifting torsion spring 302 both become ineffective. Understandably, the rotation path of the second locking part 531 is offset from the installation position of the third locking part 344, so that the second return member 530 can quickly reset after being released from its limit to press against the third pawl part 522. The first latch part 502 and the second latch part 551 are both connected by torsion springs to always apply force towards the inside of the main shaft 310. It should be noted that when the positions of the fifth locking part 532 and the third locking part 342 are offset along the axial direction of the main shaft 310, the third pawl part 522 is in a folded state; when the positions of the fifth locking part 532 and the third locking part 342 overlap along the axial direction of the main shaft 310, the third pawl part 522 is in an open state.

[0047] See Figures 2 to 9 In some embodiments of the present invention, the host 100 is further provided with a reset mechanism, which includes a return wheel 600 and a return torsion spring 610. The return wheel 600 is fixedly connected to the main shaft 310 to rotate synchronously with the main shaft 310. The return torsion spring 610 is connected between the main wheel 340 and the return wheel 600. After the main shaft 310 rotates past the shift position in the second clockwise direction, the return torsion spring 610 resets to drive the main shaft 310 to reset to the initial position in the first clockwise direction.

[0048] Specifically, in the initial position, the main wheel 340 is stopped from rotating in the shifting position by the torque of the main torsion spring 301 and the shifting torsion spring 302, thus achieving an initial state in which it does not rotate relative to the main shaft 310. When the main shaft 310 rotates from the initial position around the second clockwise direction, the return wheel 600 rotates with the main shaft 310, thereby enabling the return torsion spring 610 to generate corresponding elastic potential energy. Once the main shaft 310 has passed the shift position, the third locking part 344 pushes the second tongue locking part 551 to disengage from the second locking part 531, causing the second return member 530 to rotate back to its initial position in the first clockwise direction under the elastic action of the switching torsion spring 540. This causes the positions of the fifth locking part 532 and the third locking part 342 to be misaligned along the axial direction of the main shaft 310. The outer side of the third pawl part 522 is pressed and folded by the inner wall of the second return member 530, causing the third pawl part 522 to lose its ability to engage the third locking part 342. The torque of the main torsion spring 301 and the shifting torsion spring 302 drives the main wheel 340 to return to its initial state. The main wheel 340 and the main shaft 310 are no longer in a state of synchronous rotation. Under the elastic action of the return torsion spring 610, the main shaft 310 drives the swing arm assembly 200 to reset to its initial position in the first clockwise direction, thereby achieving the effect of automatically folding the swing arm assembly 200 after the back rubbing is completed. Understandably, if the main wheel 340 and the return wheel 600 rotate synchronously, the return torsion spring 610 will not function.

[0049] See Figures 4 to 9 In some embodiments of the present invention, the first return member 510 is provided with a seventh locking part 513, and the drive member 550 is provided with an eighth locking part 552 that engages with the seventh locking part 513. When the main shaft 310 rotates from the shift position around the first clockwise direction, the main wheel 340 rotates so that the second locking part 343 pushes the first tongue locking part 502 away from the first locking part 511, thereby causing the first return member 510 to rotate around the second clockwise direction under the elastic action of the switching torsion spring 540, so that the seventh locking part 513 engages with the eighth locking part 552. During the process of the swing arm assembly 200 automatically retracting to the initial position, the main wheel 340 returns to the initial position under the torque of the main torsion spring 301 and the shifting torsion spring 302, and the eighth locking part 552 engages with the seventh locking part 513, so that the drive member 550 drives the first return member 510 to rotate around the first clockwise direction back to the initial position.

[0050] Understandably, if the first clockwise direction is counter-clockwise and the second clockwise direction is clockwise, and the side closest to the return wheel 600 is considered the right side, then since both the main torsion spring 301 and the shifting torsion spring 302 have their right ends moving while their left ends are fixed during torque generation, both use right-handed torsion springs to provide the torque driving the swing arm assembly 200 to rotate clockwise. Similarly, since the return torsion spring 610 has its right end moving while its left end is relatively fixed during torque generation, a left-handed torsion spring is used to provide the torque driving the swing arm assembly 200 to rotate counter-clockwise. The switching torsion spring 540 uses a right-handed torsion spring, with its right end connected to the first return component 510 and its left end connected to the second return component 530. Specifically, during the process of the swing arm assembly 200 rotating clockwise from its initial position to the shift position, the first return member 510 is relatively fixed while the second return member 530 rotates with the main shaft 310 to store force in the switching torsion spring 540. Subsequently, after the swing arm assembly 200 rotates counterclockwise to enter the working state, the first return member 510 is released from its fixed state and rotates clockwise under the action of the switching torsion spring 540 to release the restriction on the main shaft 310 to rotate to its maximum angle to the shift position, and to cause the seventh locking part 513 to rotate clockwise to engage with the eighth locking part 552. Finally, after the back-rubbing is completed, the swing arm assembly 200 rotates clockwise again to pass the shift position. The second return member 530 disengages from the state of synchronous rotation with the main shaft 310 and rotates counterclockwise to reset under the action of the switching torsion spring 540, so as to release the state of synchronous rotation between the main wheel 340 and the main shaft 310. This allows the swing arm assembly 200 to reset to the initial position under the action of the return torsion spring 610. The eighth locking part 552 and the seventh locking part 513 engage with each other, so that the drive member 550 drives the first return member 510 to return to the initial position counterclockwise.

[0051] See Figures 1 to 3 , Figure 10 and Figure 11 In some embodiments of the present invention, the swing arm assembly 200 includes a swing arm plate 220, a first motor 230, a rotating assembly 240, and a fixed bracket 250. The swing arm plate 220 is fixedly connected to the main shaft 310 to drive the main shaft 310 to rotate synchronously. The first motor 230 is connected to the friction element 210 through the rotating assembly 240 to drive the friction element 210 to rotate. The fixed bracket 250 is fixedly mounted on the main unit 100. The rotating assembly 240 is rotatably mounted on the swing arm plate 220. A parallelogram linkage mechanism is connected between the fixed bracket 250 and the rotating assembly 240. During the swinging process of the swing arm plate 220, the parallelogram linkage mechanism links the rotating assembly 240 so that the rotating assembly 240 can drive the friction element 210 to produce a deflection that is always directly opposite the back of the human body.

[0052] Specifically, the swing arm plate 220 is fixedly connected to a housing 221. The housing 221 is rotatably equipped with a first bevel gear and a second bevel gear. The rotating shaft of the first motor 230 is connected to the second bevel gear through a belt drive mechanism 290. The first bevel gear and the second bevel gear mesh at a 90-degree angle to achieve a 90-degree angle conversion of power transmission. The rotating assembly 240 includes a rotating frame 241, a universal joint shaft, and an output shaft 242. The output shaft 242 is rotatably mounted on the rotating frame 241. One end of the universal joint shaft is connected to the first bevel gear, and the other end of the universal joint is connected to the output shaft 242. The output shaft 242 is connected to the friction element 210 to drive the friction element 210 to rotate. When a person swings the swing arm assembly 200, the parallelogram linkage mechanism drives the rotating assembly 240 to deflect, causing the rotating frame 241 to drive the output shaft 242 to deflect, thereby causing the friction element 210 to deflect accordingly. This allows the friction element 210 to automatically face the back of the user in a state parallel to the wall at any position, improving the user experience. In this design, after the output shaft 242 deflects, the universal joint shaft ensures the power transmission between the first bevel gear and the output shaft 242. It can be understood that the parallelogram linkage mechanism includes a movable rod 270 and two equal-length, parallel first connecting rods 260. The movable rod 270 is rotatably mounted on the swing arm plate 220. One end of the first connecting rod 260 is rotatably connected to the fixed bracket 250, and the other end is rotatably connected to the movable rod 270. The connection point of the fixed bracket 250, the two first connecting rods 260, and the movable rod 270 together form a parallelogram. Similarly, two equal-length, parallel second connecting rods 280 are provided between the rotating frame 241 and the movable rod 270. One end of the second connecting rod 280 is connected to the movable rod 270, and the other end is connected to the rotating frame 241. The connection point of the rotating frame 241, the movable rod 270, and the second connecting rods 280 together form another parallelogram linkage mechanism.

[0053] See Figure 10 In some embodiments of the present invention, the friction member 210 includes a rotating member 211, a housing 212, and an elastic member 213. The housing 212 is provided with a back-rubbing 214 facing the back of the person. The rotating assembly 240 is connected to the rotating member 211. The elastic member 213 is connected between the rotating member 211 and the housing 212. A guide limiting assembly is provided between the rotating member 211 and the housing 212. The guide limiting assembly is used to guide the housing 212 to reciprocate along the axial direction of the rotating member 211 under force.

[0054] Specifically, the guide and limiting assembly includes multiple interlocking locking blocks 2111 and insertion slots. The locking blocks 2111 are distributed circumferentially along the outer peripheral wall of the rotating component 211, and the insertion slots extend axially along the rotating component 211. The engagement of the locking blocks 2111 and the insertion slots allows the rotating component 211 to drive the outer shell 212 to rotate, and also allows the outer shell 212 to reciprocate axially along the rotating component 221. When the back-rubbing 214 encounters different concave and convex surfaces of a person's back, the elastic element 213 allows the back-rubbing 214 to be compressed under force, thereby better conforming to the person's back and improving the user experience.

[0055] See Figure 1 and Figure 2 In some embodiments of the present invention, the back-rubbing machine further includes a fixed frame 700, the top of which is provided with a wireless charger 710. A lifting mechanism 800 is provided between the main unit 100 and the fixed frame 700. The lifting mechanism 800 includes a second motor 810, a reel 820 and a rope 830. The reel 820 is rotatably mounted on the main unit 100. The second motor 810 drives the reel 820 to wind or unwind the rope 830 to move the main unit 100 up and down to rub the back or bring it close to the wireless charger 710.

[0056] Specifically, the second motor 810 is electrically connected to a controller, and the main unit 100 contains a battery that works with the wireless charger 710. When the battery is low, the controller controls the second motor 810 to drive the main unit 100 upwards, bringing it closer to the wireless charger 710 to charge the battery inside the main unit 100. When the swing arm assembly 200 is in the back-rubbing operation, the main unit 100 provides a sealed working environment for the battery, and the battery, as the sole power source, has no other electrical connections to the outside, thus avoiding the risk of electric shock to the user. It is understood that the mounting bracket 700 includes two guide rods 701 extending vertically, and the main unit 100 slides vertically on the guide rods 701.

[0057] In some embodiments, the bottom of the main unit 100 has an external connector, which can serve as an emergency charging port for the battery or be connected to a handheld controller to adjust the height of the main unit 100. An adjustment knob 101 is provided on the side wall of the main unit 100, which is electrically connected to the controller. The operating parameters of the main unit 100 or the height of the main unit 100 can be set by adjusting the knob 101. Furthermore, a display screen 102 is provided on the outside of the main unit 100 to display relevant information such as the battery level in real time.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A back-rubbing machine, characterized in that, include: Host (100); A swing arm assembly (200) is swayably mounted on the host (100), and the swing arm assembly (200) is rotatably provided with a friction element (210) facing the back of the human body. A torque mechanism (300) is provided on the host (100) and linked to the swing arm assembly (200). The torque mechanism (300) includes a main torsion spring (301) and a booster torsion spring (302). When the swing arm assembly (200) rotates around the first clockwise direction, both the main torsion spring (301) and the booster torsion spring (302) can generate torque acting on the swing arm assembly (200). A shifting component (400) is rotatably mounted on the main unit (100). The shifting component (400) drives the main torsion spring (301) and the shifting torsion spring (302) to act together on the swing arm assembly (200), or the shifting component (400) drives the main torsion spring (301) to act alone on the swing arm assembly (200). The torque mechanism (300) includes a main shaft (310), a fixed wheel (320), a shifting wheel (330), and a main wheel (340). The main shaft (310) is fixedly connected to the swing arm assembly (200), the fixed wheel (320) is fixedly mounted on the main unit (100), and the shifting wheel (330) is rotatable relative to the main unit (100). The main shaft (310) rotates, which drives the main wheel (340) to rotate synchronously around the first clockwise direction. The main torsion spring (301) is connected between the main wheel (340) and the fixed wheel (320). The shifting torsion spring (302) is connected between the main wheel (340) and the shifting wheel (330). When the main wheel (340) rotates around the first clockwise direction, the shifting wheel (330) has a first state of engaging with the fixed wheel (320) or a second state of rotating synchronously with the main wheel (340). The shifting component (400) can drive the shifting wheel (330) in the first state and the second state. Switching between positions; the swing arm assembly (200) has an initial position and a shift position. The direction in which the swing arm assembly (200) rotates from the shift position to the initial position is the first clockwise direction, and the direction in which the swing arm assembly (200) rotates from the initial position to the shift position is the second clockwise direction. The main unit (100) is also provided with a limiting mechanism. The limiting mechanism includes a fixing member (500) and a driven wheel (520) respectively sleeved on the main shaft (310). The fixing member (500) is fixedly installed on the main unit (100). The driven wheel (520) is fixedly connected to the main shaft (310). The driven wheel (520) is elastically connected to a second wheel facing opposite directions. The second pawl (521) and the third pawl (522) can be folded or elastically opened by external force. The fixing member (500) is provided with a second latch (501). The second pawl (521) and the second latch (501) cooperate to enable the main shaft (310) to stop rotating around the second clockwise direction at the shift position. The main wheel (340) is provided with a third latch (342). The third pawl (522) cooperates with the third latch (342) to enable the main shaft (310) to drive the main wheel (340) to rotate synchronously around the first clockwise direction.

2. The back-rubbing machine according to claim 1, characterized in that: The shift wheel (330) is elastically connected to a first pawl (331). The first pawl (331) can be folded or elastically opened by an external force. The fixed wheel (320) is provided with a first latch (321). The first pawl (331) cooperates with the first latch (321) so that the shift wheel (330) is in the first state. When the shift member (400) rotates around the first clockwise direction, the shift member (400) can drive the first pawl (331) to disengage from the first latch (321) so that the shift wheel (330) switches to the second state.

3. A back-rubbing machine according to claim 1, characterized in that: The limiting mechanism further includes a first return member (510), a second return member (530), and a switching torsion spring (540) disposed on the main shaft (310). The switching torsion spring (540) is connected between the first return member (510) and the second return member (530). The second return member (530) can rotate synchronously with the main shaft (310). The first return member (510) is provided with a first locking part (511). The fixing member (500) is elastically connected to a first latching part (502) that always applies force toward the inside of the main shaft (310). During the process of the main shaft (310) rotating from the initial position around the second clockwise direction to the shift position, the first locking part (511) engages with the first latching part (502) to limit the first return. The first return member (510) rotates around the second clockwise direction. The first return member (510) is provided with a fourth latch (512). When the main shaft (310) rotates from the initial position around the second clockwise direction to the shift position, the second pawl (521) is engaged in the second latch (501) and the fourth latch (512). The main wheel (340) is provided with a second locking part (343). During the process of the main wheel (340) rotating around the first clockwise direction from the shift position, the second locking part (343) pushes the first tongue locking part (502) to disengage from the first locking part (511), so that the first return member (510) rotates under the elastic force of the switching torsion spring (540) and retracts the second pawl (521).

4. A back-rubbing machine according to claim 3, characterized in that: The limiting mechanism further includes a driving member (550), which is fixedly connected to the driven wheel (520) to rotate synchronously with the driven wheel (520). The driving member (550) is elastically connected to a second latch (551) that always applies force toward the inside of the main shaft (310). The second return member (530) is provided with a second locking part (531) that engages with the second latch (551). The second return member (530) is provided with a fifth locking part (532). The main shaft (310) rotates around the second clockwise direction from the initial position. When the gear shift is turned to the shift position, the third pawl (522) engages with the third latch (342) and the fifth latch (532). The main wheel (340) is provided with a third locking part (344). When the main shaft (310) rotates past the shift position in the second clockwise direction, the third locking part (344) pushes the second tongue (551) to disengage from the second locking part (531), so that the second return member (530) rotates under the elastic force of the switching torsion spring (540) and retracts the third pawl (522).

5. A back-rubbing machine according to claim 4, characterized in that: The host (100) is also provided with a reset mechanism, which includes a return wheel (600) and a return torsion spring (610). The return wheel (600) is fixedly connected to the main shaft (310) to rotate synchronously with the main shaft (310). The return torsion spring (610) is connected between the main wheel (340) and the return wheel (600). After the main shaft (310) rotates past the shift position in the second clockwise direction, the return torsion spring (610) resets to drive the main shaft (310) to reset to the initial position in the first clockwise direction.

6. A back-rubbing machine according to claim 1, characterized in that: The swing arm assembly (200) includes a swing arm plate (220), a first motor (230), a rotating assembly (240), and a fixed bracket (250). The swing arm plate (220) is fixedly connected to the main shaft (310) to drive the main shaft (310) to rotate synchronously. The first motor (230) is connected to the friction element (210) through the rotating assembly (240) to drive the friction element (210) to rotate. The fixed bracket (250) is fixedly mounted on the host (100). The rotating assembly (240) is rotatably mounted on the swing arm plate (220). A parallelogram linkage mechanism is connected between the fixed bracket (250) and the rotating assembly (240). During the swing of the swing arm plate (220), the parallelogram linkage mechanism links the rotating assembly (240) to generate a corresponding deflection, so that the rotating assembly (240) can drive the friction element (210) to generate a deflection that is always facing the back of the human body.

7. A back-rubbing machine according to claim 6, characterized in that: The friction element (210) includes a rotating element (211), a housing (212), and an elastic element (213). The housing (212) is provided with a back-rubbing (214) facing the back of the person. The rotating assembly (240) is connected to the rotating element (211). The elastic element (213) is connected between the rotating element (211) and the housing (212). A guide limiting assembly is provided between the rotating element (211) and the housing (212). The guide limiting assembly is used to guide the housing (212) to reciprocate along the axial direction of the rotating element (211) under force.

8. A back-rubbing machine according to claim 1, characterized in that: The back-rubbing machine also includes a fixed frame (700), and a wireless charger (710) is provided on the top of the fixed frame (700). A lifting mechanism (800) is provided between the main unit (100) and the fixed frame (700). The lifting mechanism (800) includes a second motor (810), a reel (820) and a rope (830). The reel (820) is rotatably mounted on the main unit (100). The second motor (810) drives the reel (820) to wind or unwind the rope (830) to move the main unit (100) up and down to rub the back or move it closer to the wireless charger (710).

Images