A back massager electric vacuum wall-hanging device and a back massager with the same

Abstract

This utility model discloses an electric vacuum wall-mounting device for a back-rubbing machine and a back-rubbing machine incorporating the same. The device forms a cavity with the wall through a vacuum disc and a vacuum sealing ring. A vacuum pump draws air to generate negative pressure, achieving stable adhesion between the back-rubbing machine and the wall surface. A vacuum sensor monitors the vacuum value of the cavity in real time and automatically controls the start and stop of the vacuum pump to maintain stable adhesion. A vent valve allows for manual pressure balancing and easy disassembly. The device includes a filter assembly. The first filter filters impurities drawn into the cavity, and the second filter removes gas discharged from the vacuum pump and purifies the outside air entering the cavity when the vent valve is opened, protecting the equipment and extending its service life. The vacuum tube adopts a double-tube design, combined with a one-way valve to control unidirectional gas flow, ensuring vacuum stability. The vacuum disc is made of elastic material, and the annular sealing ring enhances the sealing effect. This invention has advantages such as convenient installation, strong adhesion, automatic control, and strong protection, and can be widely used in various back-rubbing machine devices.

Description

Technical Field

[0001] This utility model belongs to the technical field of back-rubbing equipment, specifically relating to an electric vacuum wall-mounting device for a back-rubbing machine and a back-rubbing machine having the same. Background Technology

[0002] In the field of personal hygiene and care equipment, back scrubbers are becoming increasingly popular because they help users clean their backs.

[0003] Existing installation and fixing methods for back scrubbers have several drawbacks. Some products use drilled screws for fixing, which not only causes permanent damage to the wall but also makes the installation process cumbersome and difficult to adjust the position. Others use adhesive structures, which are easily affected by the humid environment of the bathroom, causing the adhesive to lose its stickiness and leading to the back scrubber falling off, posing a safety hazard. Back scrubbers that use vacuum adsorption often rely on manual air extraction, making it difficult to precisely control the adsorption force and maintain adsorption stability automatically. They require frequent manual air replenishment during use, making them inconvenient to operate.

[0004] Furthermore, existing vacuum adsorption devices lack effective impurity filtration and gas purification designs. During adsorption and degassing, impurities such as water vapor and dander can easily enter the device, affecting its service life and operational reliability. Therefore, there is a need for an electric vacuum wall-mounted back-scrubbing machine that can automatically control adsorption force, is easy to install, and is safe and reliable. Utility Model Content

[0005] Therefore, this utility model provides an electric vacuum wall-mounting device for a back-rubbing machine and a back-rubbing machine having the same, which at least solves the problems of poor installation stability, easy detachment, and safety hazards of traditional back-rubbing machines.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an electric vacuum wall-mounting device for a back-rubbing machine, comprising a vacuum disc, a cavity, a vacuum sensor, a vent valve, a check valve, and a vacuum pump;

[0007] The bottom of the vacuum disk forms a cavity with the wall through a vacuum sealing ring. The cavity is connected to the one-way valve through a vacuum tube, and the one-way valve is connected to the vacuum pump.

[0008] The vacuum sensor is used to monitor the vacuum value of the cavity to control the start and stop of the vacuum pump; the vent valve connects the cavity to the outside atmosphere and is used to manually balance the pressure of the cavity.

[0009] As a preferred embodiment of the electric vacuum wall-mounting device for the back-rubbing machine, it also includes a filter assembly, which includes a first filter disposed between the cavity and the one-way valve, and a second filter disposed on the path connecting the vent valve and the outside atmosphere.

[0010] As a preferred embodiment of the electric vacuum wall-mounting device for a back-rubbing machine, the vacuum tube includes a first vacuum tube and a second vacuum tube. The first port of the first vacuum tube is connected to the cavity through the first filter screen. The second port of the first vacuum tube is connected to the vacuum sensor. The third port of the first vacuum tube is connected to the vent valve. The fourth port of the first vacuum tube is connected to the one-way valve.

[0011] The one-way valve is connected to the vacuum pump via the second vacuum tube.

[0012] As a preferred embodiment of the electric vacuum wall-mounting device for a back-rubbing machine, the vacuum pump is also connected to the vent valve and the outside atmosphere via a vent pipe, and the second filter screen is installed on the vent pipe.

[0013] The first filter screen is used to filter impurities drawn into the cavity, and the second filter screen is used to filter the gas discharged by the vacuum pump and the air that enters the cavity when the vent valve releases pressure.

[0014] As a preferred embodiment of the electric vacuum wall-mounting device for a back-rubbing machine, the vacuum disc is made of elastic material, and the vacuum sealing ring is an annular structure, arranged around the outer periphery of the bottom of the vacuum disc.

[0015] This utility model also provides a back-rubbing machine, including the above-mentioned electric vacuum wall-mounting device for the back-rubbing machine, and further including a rotary back-rubbing device and a main unit up-and-down electric moving device.

[0016] As a preferred embodiment of the back-rubbing machine, the rotary back-rubbing device includes a back-rubbing disc, a main unit panel, a crankshaft bracket, a back-rubbing drive gear, a crankshaft gear, and a back-rubbing drive mechanism.

[0017] The crankshaft bracket includes an eccentric crankshaft shaft and a central crankshaft shaft. The central crankshaft shaft passes through the main unit panel and is fixedly connected to the crankshaft gear. The crankshaft gear meshes with the back-rubbing drive gear, which is connected to the drive end of the back-rubbing drive mechanism. The eccentric crankshaft shaft is dynamically connected to the back-rubbing disc, and the eccentric crankshaft shaft is parallel to the central crankshaft shaft. The back-rubbing drive mechanism causes the back-rubbing disc to rotate around the central crankshaft shaft through the back-rubbing drive gear and the crankshaft gear.

[0018] As a preferred embodiment of the back-rubbing machine, the main unit's up-and-down electric moving device includes a base, a main unit bottom shell, a lifting drive mechanism, a lifting drive gear, and a rack;

[0019] The base is provided with a T-shaped slide rail, and the bottom of the main unit shell is provided with a T-shaped foot that fits with the T-shaped slide rail with clearance; the lifting drive mechanism is connected to the lifting drive gear through a second transmission shaft, the lifting drive gear meshes with the rack fixed on the base, and the lifting drive mechanism drives the main unit shell to move up and down along the T-shaped slide rail.

[0020] The beneficial effects of this utility model are as follows:

[0021] First, by monitoring the vacuum value of the cavity through a vacuum sensor and controlling the start and stop of the vacuum pump, a stable adsorption force can be maintained, avoiding the tedious operation of manually replenishing air, preventing the back-rubbing machine from falling off due to insufficient adsorption force, and ensuring safe use.

[0022] Secondly, the air release valve allows for manual control of the pressure in the balancing chamber, making it easy to disassemble the back scrubber without tools or damage to the wall, while also facilitating device repositioning or storage.

[0023] Third, the first filter screen filters impurities drawn into the chamber, preventing dander, moisture, and other contaminants from entering the vacuum tube and vacuum pump. The second filter screen purifies the gas discharged from the vacuum pump, reducing internal wear, extending the equipment's service life, and improving reliability.

[0024] Fourth, combined with the rotating back-rubbing device and the main unit's up-and-down electric moving device, it forms a fully functional back-rubbing machine, achieving automatic adsorption and fixation, flexible height adjustment, and efficient back cleaning, meeting diverse usage needs and enhancing the user experience. Attached Figure Description

[0025] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0026] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0027] Figure 1 A schematic diagram of the structure of the electric vacuum wall-mounting device for the back-rubbing machine provided in this embodiment of the utility model;

[0028] Figure 2A schematic diagram of the back-rubbing machine structure using an electric vacuum wall-mounting device provided for an embodiment of this utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the rotary back-rubbing device of the back-rubbing machine provided in an embodiment of the present utility model;

[0030] Figure 4 This is a schematic diagram of the lifting design of the back scrubbing machine provided in an embodiment of the present utility model;

[0031] Figure 5 A schematic diagram of a first possible design of the crankshaft bracket assembly provided in this embodiment of the present utility model;

[0032] Figure 6 A schematic diagram illustrating a second possible design of the crankshaft bracket assembly provided in this embodiment of the present utility model;

[0033] Figure 7 A schematic diagram of a third possible design for the crankshaft bracket assembly provided in this embodiment of the present utility model.

[0034] In the picture:

[0035] A1. Back-rubbing disc; A2. Main unit front panel; A3. Main unit middle layer; A4. Main unit bottom shell; A5. Base;

[0036] B. Crankshaft bracket; B1. Crankshaft eccentric shaft; B2. Crankshaft central shaft; B3. Snap ring; B4. Second bearing;

[0037] C1, back-rubbing drive gear; C2, crankshaft gear; C3, back-rubbing drive mechanism;

[0038] D1, First filter; D2, Vacuum sensor; D3, Vent valve; D4, Check valve; D5, Vacuum pump; D6, Second filter; D7, First vacuum tube; D8, Second vacuum tube; D9, Vent pipe;

[0039] E1, First bearing; E2, Crankshaft seal ring;

[0040] F1, Vacuum disk; F2, Vacuum sealing ring; F3, Cavity; F4, Wall;

[0041] H1, Lifting drive mechanism; H21, First drive shaft; H22, Second drive shaft; H3, Lifting drive gear; H4, Rack; H51, First shaft seal ring; H52, Second shaft seal ring; H6, Mounting groove;

[0042] T1, T-shaped foot; T2, T-shaped slide; T3, trapezoidal groove;

[0043] X, pressing point. Detailed Implementation

[0044] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0045] See Figure 1 This utility model provides an electric vacuum wall-mounting device for a back-rubbing machine, including a vacuum disc F1, a cavity F3, a vacuum sensor D2, a vent valve D3, a one-way valve D4, and a vacuum pump D5;

[0046] Wherein, the bottom of the vacuum disk F1 forms the cavity F3 with the wall through the vacuum sealing ring F2, the cavity F3 is connected to the one-way valve D4 through the vacuum tube, and the one-way valve D4 is connected to the vacuum pump D5;

[0047] The vacuum sensor D2 is used to monitor the vacuum value of the cavity F3 to control the start and stop of the vacuum pump D5; the vent valve D3 connects the cavity F3 to the outside atmosphere and is used to manually balance the pressure of the cavity F3.

[0048] Specifically, the electric vacuum wall mounting device of the back scrubber achieves fixation based on atmospheric pressure difference. After vacuum pump D5 starts, air is drawn from cavity F3 between vacuum disc F1 and the wall through one-way valve D4, making the air pressure inside cavity F3 lower than the outside atmospheric pressure. The atmospheric pressure then presses vacuum disc F1 tightly against the wall. Vacuum sensor D2 monitors the vacuum value of cavity F3 in real time. When the vacuum value drops due to slight leakage, vacuum pump D5 is automatically started to replenish air; when the set upper limit of vacuum value is reached, vacuum pump D5 stops to maintain stable suction force. The vent valve D3 is manually opened when the device needs to be disassembled, allowing outside air to enter cavity F3, balancing the internal and external air pressure, eliminating suction force, and facilitating the removal of the back scrubber.

[0049] In this embodiment, a filter assembly is also included, which includes a first filter D1 disposed between the cavity F3 and the one-way valve D4, and a second filter D6 disposed on the communication path between the vent valve D3 and the outside atmosphere.

[0050] Specifically, the filter assembly serves to protect the equipment and purify the gas. The first filter, D1, intercepts impurities drawn into the cavity F3, such as dander, hair, and particles in water vapor produced during showering, preventing these substances from entering the vacuum tube and vacuum pump D5, thus avoiding pipe blockage or internal wear of the equipment. A second filter, D6, is installed on the vent pipe D9, which connects the vent valve D3 to the outside atmosphere. When the vent valve D3 is open, it filters the outside air entering the cavity F3 through the vent pipe D9.

[0051] In this embodiment, the vacuum tube includes a first vacuum tube D7 and a second vacuum tube D8. The first port of the first vacuum tube D7 is connected to the cavity F3 through the first filter D1. The second port of the first vacuum tube D7 is connected to the vacuum sensor D2. The third port of the first vacuum tube D7 is connected to the vent valve D3. The fourth port of the first vacuum tube D7 is connected to the one-way valve D4. The one-way valve D4 is connected to the vacuum pump D5 through the second vacuum tube D8.

[0052] Specifically, the dual vacuum tube design clearly defines the gas flow direction and functional allocation. The first vacuum tube D7 serves as the core channel, with one end connected to the cavity F3 via the first filter D1 to ensure the cleanliness of the intake gas; the other end has multiple ports, respectively connected to the vacuum sensor D2 (monitoring gas pressure), the vent valve D3 (balancing gas pressure), and the one-way valve D4 (controlling unidirectional gas flow). The second vacuum tube D8 connects the one-way valve D4 to the vacuum pump D5, stably transmitting the suction force generated by the vacuum pump D5 to the cavity F3. The one-way valve D4 prevents gas backflow, ensuring that the vacuum level in the cavity F3 does not rapidly decrease when the pump stops working.

[0053] In this embodiment, the vacuum pump D5 is also connected to the vent pipe D9, which connects the vent valve D3 to the outside atmosphere. The second filter D6 is disposed on the vent pipe D9. The first filter D1 is used to filter impurities sucked into the cavity F3, and the second filter D6 is used to filter the outside air entering the cavity F3 when the vent valve D3 is opened.

[0054] Specifically, vacuum pump D5 is connected to vent pipe D9, which helps to expel gas from cavity F3 during venting, accelerating the pressure balance process. Second filter D6 is installed on vent pipe D9 to perform secondary purification of the gas discharged from vacuum pump D5, preventing contaminants such as oil and debris from being released to the outside. First filter D1 intercepts impurities in cavity F3 during the intake phase. This bidirectional filtration mechanism ensures the stability of equipment operation and environmental cleanliness.

[0055] In this embodiment, the vacuum disk F1 is made of elastic material, and the vacuum sealing ring F2 is an annular structure that surrounds the outer periphery of the bottom of the vacuum disk F1.

[0056] Specifically, the elastic material properties of the vacuum disk F1 allow it to fit tightly against uneven walls, filling tiny gaps and improving the sealing effect. The annular vacuum sealing ring F2 further enhances the sealing performance by tightly wrapping the edge of the vacuum disk F1 through elastic deformation, preventing outside air from seeping into the cavity F3 and ensuring a stable internal vacuum. The combination of these two components effectively reduces the risk of leakage and improves the reliability and adaptability of the adsorption device.

[0057] See Figure 2 , Figure 3 and Figure 4 This utility model embodiment also provides a back-rubbing machine using the electric vacuum wall-mounting device of the above embodiment. The back-rubbing machine includes a rotary back-rubbing device; the rotary back-rubbing device includes a back-rubbing disc A1, a main unit panel A2, a main unit middle layer A3, a crankshaft bracket B, a back-rubbing drive gear C1, a crankshaft gear C2, and a back-rubbing drive mechanism C3.

[0058] The crankshaft bracket B includes an eccentric crankshaft B1 and a central crankshaft B2. The central crankshaft B2 passes through the main unit panel A2 and is fixedly connected to the crankshaft gear C2. The crankshaft gear C2 meshes with the back-rubbing drive gear C1, which is connected to the drive end of the back-rubbing drive mechanism C3. The back-rubbing drive mechanism C3 is connected to the middle layer A3 of the main unit. The eccentric crankshaft B1 is dynamically connected to the back-rubbing disc A1. The eccentric crankshaft B1 is parallel to the central crankshaft B2. The back-rubbing drive mechanism C3 causes the back-rubbing disc A1 to rotate around the central crankshaft B2 through the back-rubbing drive gear C1 and the crankshaft gear C2.

[0059] Specifically, the back-rubbing drive mechanism C3 drives the crankshaft gear C2 to rotate via the back-rubbing drive gear C1. The crankshaft gear C2 is fixed to the main unit panel A2 via the crankshaft central shaft B2, forming a fixed rotation center. Since the crankshaft eccentric shaft B1 is parallel to the crankshaft central shaft B2 and has an eccentric distance, when the crankshaft gear C2 rotates, the crankshaft eccentric shaft B1 drives the back-rubbing disc A1 to perform circular motion around the crankshaft central shaft B2, rather than the traditional rotational motion. This motion method ensures that all points on the back-rubbing disc A1 are at the same distance from the rotation center, thus the trajectory length of each point is the same, avoiding the problem of uneven cleaning force between the center and edges of the traditional back-rubbing disc A1, simulating a uniform kneading effect similar to massage. The main unit's middle layer A3 connects to the main unit panel A2, and a cavity is formed between the main unit panel A2 and the main unit's middle layer A3 to accommodate the back-rubbing drive gear C1 and the crankshaft gear C2.

[0060] In one possible embodiment, the device further includes an electric up-and-down movement mechanism for the main unit; the electric up-and-down movement mechanism for the main unit includes a base A5, a main unit bottom shell A4, a lifting drive mechanism H1, a lifting drive gear H3, and a rack H4; the base A5 is provided with a T-shaped slide rail T2, and the bottom of the main unit bottom shell A4 is provided with a T-shaped foot T1 that is clearance-fitted with the T-shaped slide rail T2; the end of the T-shaped foot T1 extends into the mounting groove H6 at the bottom of the main unit bottom shell A4; the lifting drive mechanism H1 is connected to the lifting drive gear H3 through a second drive shaft H22, and the lifting drive gear H3 meshes with the rack H4 fixed on the base A5; a second shaft sealing ring H52 is provided around the second drive shaft H22.

[0061] Specifically, after the lifting drive mechanism H1 is activated, it drives the lifting drive gear H3 to rotate via the second transmission shaft H22. The lifting drive gear H3 meshes with the rack H4 fixed on the base A5, converting the rotational motion of the lifting drive mechanism H1 into linear motion. This drives the main body base A4 to move up and down along the T-shaped slide rail T2 of the base A5. A cavity is formed between the main body base A4 and the main body middle layer A3 to accommodate the back-rubbing drive mechanism C3. The clearance fit between the T-shaped foot T1 and the T-shaped slide rail T2 provides mechanical guidance, ensuring that the main body base A4 moves smoothly without deviation during lifting. The mounting groove H6 enhances structural stability by fixing the end of the T-shaped foot T1. The second shaft sealing ring H52 prevents moisture from entering the motor, improving the durability of the back-rubbing machine in humid environments.

[0062] In one possible embodiment, the base A5 has a trapezoidal groove T3 on its inner front side, the trapezoidal groove T3 is fitted with the trapezoidal part of the rack H4 with zero clearance, and a clamping point X is provided on one side of the trapezoidal groove T3 to fix the rack H4.

[0063] Specifically, the trapezoidal groove T3 and the trapezoidal portion of the rack H4 are fitted with zero clearance. Utilizing the inclined structure of the trapezoidal surface, the horizontal force generated during gear meshing is converted into a normal force perpendicular to the inclined surface, increasing friction to prevent lateral movement of the rack H4. The clamping point X further locks the position of the rack H4 with mechanical pressure (such as screw tightening) to prevent loosening due to vibration during long-term use, ensuring the stability and accuracy of the lifting movement.

[0064] In one possible embodiment, the crankshaft bracket B is provided with a crankshaft seal ring E2 and a first bearing E1 at the connection between the crankshaft bracket B and the main unit panel A2.

[0065] Specifically, the crankshaft seal E2 is made of elastic material and fits tightly against the connection between the crankshaft center shaft B2 and the main unit panel A2 to prevent water vapor from seeping into the main unit during showering, thus avoiding short circuits or mechanical corrosion. The first bearing E1 (such as a deep groove ball bearing) is installed between the crankshaft center shaft B2 and the main unit panel A2, using rolling friction instead of sliding friction to reduce transmission losses, making the crankshaft center shaft B2 rotate more smoothly, and reducing noise.

[0066] In one possible embodiment, a second bearing B4 is provided at the bottom of the back-rubbing disc A1, and a connecting hole is formed between the inner hole of the back-rubbing disc A1 and the second bearing B4. The inner diameter of the connecting hole is larger than the outer diameter, and a transition slope is provided between the inner and outer diameters of the connecting hole. The outer diameter of the connecting hole is slightly larger than the outer diameter of the crankshaft eccentric shaft B1.

[0067] Specifically, the outer diameter of the connecting hole is slightly larger than the outer diameter of the crankshaft eccentric shaft B1, facilitating quick alignment and insertion; the inner diameter is larger and has a transition ramp. When the crankshaft eccentric shaft B1 is inserted, the retaining ring B3 is compressed along the ramp. After insertion, the inner diameter expands, causing the retaining ring B3 to spring back and lock into the inner step of the connecting hole, achieving "insertion and locking". The second bearing B4 allows the back-rubbing disc A1 to rotate slightly on the crankshaft eccentric shaft B1, compensating for crankshaft machining errors or installation deviations, and avoiding jamming or wear caused by rigid connection.

[0068] In one possible embodiment, the crankshaft eccentric shaft B1 is provided with a retaining ring B3 groove, and a retaining ring B3 is installed in the retaining ring B3 groove; the outer diameter of the retaining ring B3 is normally larger than the outer diameter of the crankshaft eccentric shaft B1, and is equal to or larger than the inner diameter of the connecting hole.

[0069] Specifically, the retaining ring B3 is an elastic element, and its outer diameter is larger than the inner diameter of the connecting hole under normal conditions. When the back-rubbing disc A1 is inserted, the retaining ring B3 is compressed due to the smaller outer diameter. After entering the inner hole, because the inner diameter matches the outer diameter of the retaining ring B3, the retaining ring B3 springs back and locks into the step of the connecting hole, forming a mechanical lock to prevent the back-rubbing disc A1 from falling off. During disassembly, the back-rubbing disc A1 is pulled outward, and the retaining ring B3 is compressed again to disengage. No tools are required, making it easy to replace or clean.

[0070] In one possible embodiment, the back-rubbing drive mechanism C3 is connected to the back-rubbing drive gear C1 via a first drive shaft H21. The back-rubbing drive gear C1 meshes with at least two crankshaft gears C2, and the crankshaft gears C2 independently drive the corresponding crankshaft brackets B. A first shaft seal ring H51 is provided around the first drive shaft H21.

[0071] Specifically, a single back-rubbing drive mechanism C3 simultaneously drives multiple crankshaft gears C2 through a back-rubbing drive gear C1. Each crankshaft gear C2 independently drives its corresponding crankshaft bracket B, achieving synchronous movement of multiple back-rubbing discs A1. This design simplifies the transmission structure and reduces costs. The first shaft seal ring H51 seals the gap between the drive shaft and the main unit panel A2, preventing moisture from entering and protecting internal components.

[0072] See Figure 5 In one possible embodiment, the crankshaft bracket assembly is at least one set, and the eccentricity direction and the direction of movement of each set of crankshaft eccentric shafts B1 are consistent.

[0073] Specifically, the crankshaft eccentric shafts B1 in the same group are offset in the same direction (e.g., all to the left or all to the right) and rotate in the same direction (all clockwise or all counterclockwise), so that the circular motion trajectory of the back-rubbing discs A1 in the group is synchronized, producing consistent back-rubbing force and direction, which is suitable for large-area uniform cleaning of the back, such as unidirectional rubbing from bottom to top or from left to right.

[0074] See Figure 6 In one possible embodiment, at least one set of the back-rubbing discs A1 is provided, and each set of the back-rubbing discs A1 and at least two crankshaft brackets B form a crankshaft bracket group. The eccentric direction of the crankshaft eccentric shaft B1 of the same set of crankshaft brackets B is consistent, and the eccentric direction and movement direction of the crankshaft brackets B of different sets are set independently.

[0075] Specifically, the crankshaft brackets B in different groups can be independently set with eccentric direction and movement direction. For example, one group of eccentric shafts can rotate clockwise to the left, while another group can rotate counterclockwise to the right. This design allows the movement trajectories of different groups of back-rubbing discs A1 to form interlaced or opposing movements, simulating the "kneading" action of manual massage, enhancing the cleaning effect on complex areas such as the shoulders, neck, and both sides of the spine, and adapting to different body types and cleaning needs.

[0076] See Figure 7 In one possible embodiment, each crankshaft bracket group is equipped with an independent back-rubbing drive mechanism C3 to achieve independent control of the rotational speed and steering of different back-rubbing discs A1. Alternatively, multiple crankshaft bracket groups may be equipped with one back-rubbing drive mechanism C3.

[0077] Specifically, each independent back-rubbing drive mechanism C3 can have its speed and direction adjusted individually. For example, the high-speed mode is used for powerful cleaning of stubborn dirt, while the low-speed mode is used for gentle massage of sensitive skin. Clockwise or counterclockwise rotation can simulate different massage techniques. Users can switch modes according to their own needs to enhance the personalized experience and applicability of the product.

[0078] Among them, the back-rubbing drive mechanism C3 can be a drive motor or a geared motor. Each crankshaft bracket B can be equipped with a single drive motor or geared motor to drive multiple back-rubbing discs A1, or the back-rubbing discs A1 can be independently controlled by the corresponding drive motor or geared motor.

[0079] In actual massage, the techniques are relatively uniform and stable. When the length of the motion thread of all points on the back-rubbing disc A1 is consistent, it means that during the rotation of the back-rubbing disc A1, the distance of motion between each position on its surface and the human back is the same. There will be no situation where some areas are excessively rubbed and others are insufficiently rubbed. It can clean or massage the back more evenly, simulating the uniform and stable characteristics of massage movements in terms of motion effect, thus improving the user experience.

[0080] The working principle of this utility model's electric vacuum wall-mounting back-rubbing machine is as follows:

[0081] When the back-rubbing drive mechanism C3 is powered on, it begins to rotate, and its rotational power is transmitted to the back-rubbing drive gear C1 through the first transmission shaft H21. The back-rubbing drive gear C1 meshes with the crankshaft gear C2. Due to the principle of gear transmission, the rotation of the back-rubbing drive gear C1 drives the crankshaft gear C2 to rotate synchronously. The crankshaft central shaft B2 passes through the main unit panel A2 and is fixedly connected to the crankshaft gear C2, so the rotation of the crankshaft gear C2 drives the crankshaft central shaft B2 to rotate together. The crankshaft eccentric shaft B1 is parallel to the crankshaft central shaft B2, and the crankshaft eccentric shaft B1 is dynamically connected to the back-rubbing disc A1 (e.g., connected via a quick-connect interface). When the crankshaft central shaft B2 rotates, due to the relative positional relationship between the crankshaft eccentric shaft B1 and the crankshaft central shaft B2, the crankshaft eccentric shaft B1 will perform a circular motion around the crankshaft central shaft B2, thereby driving the back-rubbing disc A1 to perform a circular rotation around the crankshaft central shaft B2.

[0082] Let P be any point on the surface of the back-rubbing disc A1, and let L be the path length of P. Let R be the distance from the crankshaft central axis B2 to the crankshaft eccentric axis B1. During the rotation of the back-rubbing disc A1 around the crankshaft central axis B2, the path length of any point P on the surface of the back-rubbing disc A1 is L = 2Rπ, ensuring that the path length L of all points on the disc is consistent. In this way, when the back-rubbing disc A1 rotates, the distance of movement between each position and the human back is the same, simulating a uniform and stable effect similar to a massage, avoiding the problem of uneven cleaning force in traditional back-rubbing tools.

[0083] When the lifting drive mechanism H1 is energized, it transmits rotational power to the lifting drive gear H3 via the second transmission shaft H22. The lifting drive gear H3 meshes with the rack H4 fixed on the base A5. The rack and pinion transmission has the characteristic of converting rotational motion into linear motion. When the lifting drive gear H3 rotates under the drive of the lifting drive mechanism H1, the rotation of the gear causes the meshing rack H4 to produce linear motion due to the meshing relationship between the gear and the rack H4. The rack H4 is fixed on the base A5, and the main body shell A4 is fitted with the T-shaped slide T2 of the base A5 through a T-shaped foot T1. The end of the T-shaped foot T1 extends into the mounting groove H6 at the bottom of the main body shell A4. As the rack H4 moves linearly, the main body shell A4 moves smoothly up and down along the T-shaped slide T2, realizing the adjustment of the height of the back scrubbing machine. During this process, the cooperation between the T-shaped slide T2 and the T-shaped foot T1 plays a guiding role, ensuring that the main unit's bottom shell A4 will not shift or shake during the up and down movement; the second shaft seal ring H52 prevents moisture from entering the motor and protects the motor to work normally.

[0084] The base A5 has a trapezoidal groove T3 on its inner front side, and the trapezoidal part of the rack H4 is fitted into the trapezoidal groove T3 with zero clearance. This trapezoidal structure utilizes the friction of the inclined plane to effectively counteract the horizontal component force generated during gear meshing, preventing the rack H4 from shifting in the horizontal direction. At the same time, the clamping point X on one side of the trapezoidal groove T3 (e.g., by tightening with screws) further applies pressure to the rack H4, firmly fixing it to the base A5. This ensures that the rack H4 will not loosen during long-term use and frequent lifting movements, guaranteeing the stability and reliability of the entire main unit's electric up-and-down movement device.

[0085] When vacuum pump D5 starts, air is drawn from the cavity F3 formed by the bottom of vacuum disc F1 and wall F4 through one-way valve D4. As air is continuously drawn out, the pressure inside cavity F3 gradually decreases, creating a negative pressure environment. Meanwhile, the external atmospheric pressure remains constant, creating a pressure difference between the inside and outside of cavity F3. According to the pressure formula F = P × S (where P is the pressure difference and S is the contact area between vacuum disc F1 and the wall), under the action of this pressure difference, atmospheric pressure presses vacuum disc F1 tightly against the wall, thus achieving stable adsorption and fixation of the back-rubbing machine. Vacuum sensor D2 monitors the vacuum value inside cavity F3 in real time. When the vacuum value inside cavity F3 drops below the lower limit set by vacuum sensor D2 due to various reasons (such as slight air leakage), vacuum sensor D2 sends a signal to automatically start vacuum pump D5. Vacuum pump D5 then draws air into cavity F3 through one-way valve D4, causing the vacuum value inside cavity F3 to rise again. When the vacuum level rises to the set upper limit, vacuum sensor D2 sends a signal to control vacuum pump D5 to stop working. In this way, through the coordinated work of vacuum sensor D2 and vacuum pump D5, the vacuum level in cavity F3 can be automatically maintained within a certain range, ensuring the stability of the back-rubbing machine's adsorption.

[0086] The vent valve D3 is in manual control mode. When the back scrubber needs to be disassembled, the vent valve D3 is manually opened, allowing outside air to enter the cavity F3 through the vent pipe D9 and the second filter D6. Simultaneously, the opening of the vent valve D3 triggers circuit control, cutting off the power to the vacuum sensor D2 and the vacuum pump D5. As outside air continuously enters the cavity F3, the pressure inside the cavity F3 gradually balances with the external atmospheric pressure. At this point, the atmospheric pressure's suction force on the vacuum disc F1 disappears, allowing the back scrubber to be easily removed from the wall. A first filter D1 is located at the connection between the vacuum tube and the cavity F3. Its function is to filter impurities drawn into the cavity F3, such as dander, hair, and particles from water vapor generated during bathing, preventing these impurities from entering the vacuum tube, avoiding blockage, ensuring smooth airflow, and thus ensuring the normal operation of the vacuum adsorption function. A second filter D6 is installed on the vent pipe D9, which connects the vent valve D3 to the outside atmosphere. Its function is to filter the outside air entering the cavity F3 through the vent pipe D9 when the air is discharged from the cavity F3 by the vacuum pump D5 and when the vent valve D3 is open.

[0087] The method of using the electric vacuum wall-mounted back-rubbing machine of this utility model is as follows:

[0088] First, installation and fixing.

[0089] Choose a location in the bathroom with a smooth, dry, and easily accessible wall surface. Check that all parts of the back scrubber are in good working order, and that the surface of the vacuum disc (F1) and the contact area with the wall are free of debris and dust.

[0090] Turn on the power to the back scrubber and turn on the vacuum pump D5 switch. Vacuum pump D5, through one-way valve D4, draws air from the cavity F3 formed by the bottom of the vacuum disc F1 and the wall F4, gradually reducing the pressure inside cavity F3. As the pressure inside cavity F3 falls below the external atmospheric pressure, the vacuum disc F1 adheres tightly to the wall under atmospheric pressure. During this process, vacuum sensor D2 monitors the vacuum value of cavity F3 in real time. When the vacuum value reaches the set stable adsorption range, vacuum pump D5 stops working (if the vacuum value subsequently decreases, vacuum pump D5 will automatically start to replenish the air).

[0091] Second, adjust the height.

[0092] The user stands in front of the back scrubber and roughly estimates the appropriate height for cleaning their back. Generally, for adults, the center height of the back scrubber is about 1.5-1.6 meters from the ground, but this can be slightly adjusted according to the user's actual height.

[0093] Locate the lifting control button on the main unit panel A2 and press it. At this time, the lifting drive mechanism H1 is powered on and starts. The motor's rotational power is transmitted to the lifting drive gear H3 via the second transmission shaft H22. The lifting drive gear H3 meshes with the rack H4 fixed on the base A5. Due to the transmission relationship between the gear and rack H4, the main unit's base A4 moves smoothly up and down along the T-shaped slide rail T2 of the base A5. When the desired height is reached, release the button, the lifting drive mechanism H1 stops operating, and the back-rubbing machine is fixed at the corresponding height position.

[0094] Third, select mode

[0095] Depending on your preference for the intensity and speed of the back scrubbing, operate the speed adjustment button on the main unit panel A2. The speed adjustment button typically has multiple settings, such as low, medium, and high. When the low setting is selected, the back scrubbing drive mechanism C3 operates at a lower speed. Through the transmission of the back scrubbing drive gear C1 and crankshaft gear C2, the circular rotation speed of the back scrubbing disc A1 is slower, suitable for users with sensitive skin or those who prefer a gentle cleanse. When the high setting is selected, the speed of the back scrubbing drive mechanism C3 increases, the rotation speed of the back scrubbing disc A1 increases, and the cleaning intensity is enhanced, suitable for situations requiring a strong cleanse.

[0096] If the back-rubbing machine has more than one set of back-rubbing discs A1, and each set of crankshaft brackets B is equipped with an independent back-rubbing drive mechanism C3, the rotation direction of different sets of back-rubbing discs A1 can be set separately through corresponding control buttons. For example, one set of back-rubbing discs A1 can be set to rotate clockwise, and another set can rotate counterclockwise to simulate different massage techniques and meet diverse back-rubbing needs.

[0097] Fourth, begin rubbing the back.

[0098] The user stands with their back to the back scrubber, feet shoulder-width apart, adjusting their body position so that their back is fully in contact with the scrubbing disc A1. Pressing the start button on the main unit panel A2 activates the scrubbing drive mechanism C3. Power from the scrubbing drive mechanism C3 is transmitted to the scrubbing drive gear C1 via the first transmission shaft H21. The scrubbing drive gear C1 meshes with the crankshaft gear C2, causing the crankshaft gear C2 to rotate. Since the crankshaft central shaft B2 is fixedly connected to the crankshaft gear C2, and the crankshaft eccentric shaft B1 is dynamically connected to the scrubbing disc A1, and the crankshaft eccentric shaft B1 is parallel to the crankshaft central shaft B2, the scrubbing disc A1 rotates in a circular motion around the crankshaft central shaft B2, beginning the cleaning and massage of the user's back. During the scrubbing process, if the user feels that a certain area is not cleaned thoroughly enough or needs focused cleaning, they can adjust their body posture to ensure that different areas of their back are fully in contact with the scrubbing disc A1.

[0099] If you need to replace the back scrubber A1 with a different type (such as a softer or more powerful one), you can use the quick-release interface between the back scrubber A1 and the crankshaft eccentric shaft B1. Since the outer diameter of the connecting hole is slightly larger than the outer diameter of the crankshaft eccentric shaft B1, and it has an internal transition ramp and a retaining spring B3 structure, simply pull the back scrubber A1 outwards. The retaining spring B3 will be compressed, allowing you to remove the back scrubber A1. Then, align and insert the new back scrubber A1. The retaining spring B3 will spring back and lock into place on the inner step of the connecting hole, completing the replacement. To clean the back scrubber, after removing the back scrubber A1, wipe the main unit panel A2 and the mounting area of ​​the back scrubber A1 with a damp cloth. For crevices or hard-to-reach areas, use a small brush and cleaning agent.

[0100] Fifth, disassembly and storage

[0101] After use, locate the vent valve D3 and manually open it. Once D3 is open, outside air enters chamber F3 through vent pipe D9 and the second filter D6, simultaneously cutting off the power to vacuum sensor D2 and vacuum pump D5. As air enters, the pressure inside chamber F3 gradually equalizes with the outside atmospheric pressure. Once the pressure inside and outside chamber F3 is balanced, gently remove the back scrubber from the wall. Store the back scrubber in a dry, well-ventilated place. If it will not be used for a long time, consider placing it in a dedicated storage bag or box to prevent dust accumulation and damage to parts.

[0102] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An electric vacuum wall-mounting device for a back-rubbing machine, characterized in that, It includes a vacuum disk (F1), a cavity (F3), a vacuum sensor (D2), a vent valve (D3), a check valve (D4), and a vacuum pump (D5); The bottom of the vacuum disk (F1) forms a cavity (F3) with the wall (F4) through a vacuum sealing ring (F2). The cavity (F3) is connected to the one-way valve (D4) through a vacuum tube. The one-way valve (D4) is connected to the vacuum pump (D5). The vacuum sensor (D2) is used to monitor the vacuum value of the cavity (F3) to control the start and stop of the vacuum pump (D5); the vent valve (D3) connects the cavity (F3) to the outside atmosphere and is used to manually balance the pressure of the cavity (F3).

2. The electric vacuum wall-mounting device for a back-rubbing machine according to claim 1, characterized in that, It also includes a filter assembly, which includes a first filter (D1) disposed between the cavity (F3) and the one-way valve (D4), and a second filter (D6) disposed on the path connecting the vent valve (D3) to the outside atmosphere.

3. The electric vacuum wall-mounting device for a back-rubbing machine according to claim 2, characterized in that, The vacuum tube includes a first vacuum tube (D7) and a second vacuum tube (D8). The first port of the first vacuum tube (D7) is connected to the cavity (F3) through the first filter (D1). The second port of the first vacuum tube (D7) is connected to the vacuum sensor (D2). The third port of the first vacuum tube (D7) is connected to the vent valve (D3). The fourth port of the first vacuum tube (D7) is connected to the one-way valve (D4). The one-way valve (D4) is connected to the vacuum pump (D5) via the second vacuum tube (D8).

4. The electric vacuum wall-mounting device for a back-rubbing machine according to claim 2, characterized in that, The vacuum pump (D5) is also connected to the vent valve (D3) and the outside atmosphere via a vent pipe (D9), and the second filter (D6) is installed on the vent pipe (D9). The first filter (D1) is used to filter impurities drawn into the cavity (F3), and the second filter (D6) is used to filter the gas discharged by the vacuum pump (D5) and the air entering the cavity (F3) when the vent valve (D3) is depressurized.

5. The electric vacuum wall-mounting device for a back-rubbing machine according to claim 1, characterized in that, The vacuum sealing ring (F2) has an annular structure and is arranged around the outer periphery of the bottom of the vacuum disk (F1).

6. A back-rubbing machine, characterized in that, The device includes the electric vacuum wall-mounting device for the back-rubbing machine as described in any one of claims 1-5, and further includes a rotary back-rubbing device and an electric up-and-down moving device for the main unit.

7. The back-rubbing machine according to claim 6, characterized in that, The rotary back-rubbing device includes a back-rubbing disc (A1), a main unit panel (A2), a crankshaft bracket (B), a back-rubbing drive gear (C1), a crankshaft gear (C2), and a back-rubbing drive mechanism (C3). The crankshaft bracket (B) includes a crankshaft eccentric shaft (B1) and a crankshaft central shaft (B2). The crankshaft central shaft (B2) passes through the main unit panel (A2) and is fixedly connected to the crankshaft gear (C2). The crankshaft gear (C2) meshes with the back-rubbing drive gear (C1), and the back-rubbing drive gear (C1) is connected to the drive end of the back-rubbing drive mechanism (C3). The crankshaft eccentric shaft (B1) is dynamically connected to the back-rubbing disc (A1). The crankshaft eccentric shaft (B1) is parallel to the crankshaft central shaft (B2). The back-rubbing drive mechanism (C3) causes the back-rubbing disc (A1) to rotate around the crankshaft central shaft (B2) through the back-rubbing drive gear (C1) and the crankshaft gear (C2).

8. The back-rubbing machine according to claim 6, characterized in that, The main unit's up-and-down electric moving device includes a base (A5), a main unit bottom shell (A4), a lifting drive mechanism (H1), a lifting drive gear (H3), and a rack (H4); The base (A5) is provided with a T-shaped slide (T2), and the bottom of the main unit shell (A4) is provided with a T-shaped foot (T1) that is clearance-fitted with the T-shaped slide (T2); the lifting drive mechanism (H1) is connected to the lifting drive gear (H3) through the second transmission shaft (H22), the lifting drive gear (H3) meshes with the rack (H4) fixed on the base (A5), and the lifting drive mechanism (H1) drives the main unit shell (A4) to move up and down along the T-shaped slide (T2).

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