Three-dimensional electric bath brush

Abstract

The invention discloses a three-dimensional electric bath brush, and mainly relates to the technical field of bath tools. Comprising a handle, a U-shaped mounting frame is obliquely arranged at one end of the handle, and the U-shaped mounting frame comprises a brush head mounting frame; a roll shaft brush head is rotationally arranged on the side, close to the L-shaped support, of the brush head mounting frame, a motor waterproof shell matched with the roll shaft brush head is horizontally arranged on the inner side of the L-shaped support, and a motor used for driving the roll shaft brush head to rotate is arranged in the motor waterproof shell; the motor or the motor waterproof shell is provided with a torque sensor used for detecting the resistance torque of an output shaft of the motor, and the torque sensor and the motor are both in signal connection with a controller in the handle. The invention can obviously improve the force arm balance, is not easy to fatigue after long-time use, ensures the dynamic balance between the cleaning power and skin deformation, and improves the dead skin removal rate.

Description

Technical Field

[0001] The invention relates to the technical field of bathing tools, in particular to a three-dimensional electric bathing brush. Background Art

[0002] An electric bath brush is a bathing tool that uses a motor to automatically clean itself. Existing electric bath brushes generally use a disc-shaped rotating design, where the brush head rotates around an axis parallel to the handle. This has the following structural defects: 1. Low cleaning efficiency.

[0003] There is a nonlinear relationship between the pressing force and the cleaning effect: when the pressure is light, the friction is insufficient (cleaning force attenuation ≥40%); when the pressure is heavy, the centrifugal force causes the brush head to slip; the two-dimensional plane rotation (110-222rpm) has a penetration rate of less than 35% on skin folds, and a deep oil removal rate of less than 50%; the difference in bristle density is greater than 15%, which easily forms a cleaning blind spot.

[0004] 2. Ergonomic defects.

[0005] The top-heavy structure (the front-mounted motor and battery account for >70% of the total machine weight), with a lever ratio ≥1:3, causes the forearm flexor muscle fatigue index to increase by 300% after a few minutes of continuous operation. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems existing in the prior art and provide a three-dimensional electric shower brush that can significantly improve the balance of the force arm, is not easy to get tired after long-term use, ensures the dynamic balance between cleaning power and skin deformation, and improves the dead skin removal rate.

[0007] To achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: A three-dimensional electric bath brush comprises a handle, one end of which is obliquely provided with a U-shaped mounting bracket, the U-shaped mounting bracket comprising an L-shaped bracket fixedly connected to the handle and a brush head mounting bracket arranged at one end of the L-shaped bracket and detachably connected to the L-shaped bracket; a roller brush head is rotatably provided on the side of the brush head mounting bracket close to the L-shaped bracket, the roller brush head is perpendicular to the handle, a motor waterproof housing adapted to the roller brush head is horizontally provided on the inner side of the L-shaped bracket, a motor for driving the roller brush head to rotate is provided in the motor waterproof housing, the output shaft of the motor extends outward from the motor waterproof housing, and a brush head for rotating with the roller brush head is provided at the end of the output shaft extending out of the motor waterproof housing. A connecting piece for transmission connection, the connecting piece is detachably connected to the roller brush head, and a center hole adapted to the motor waterproof housing is provided in the roller brush head, the motor or the motor waterproof housing is provided with a torque sensor for detecting the resistance torque of the output shaft of the motor, the torque sensor and the motor are both connected to the controller signal in the handle, when the resistance torque detected by the torque sensor is greater than a first set threshold, the controller controls the motor to automatically reduce the speed and increase the torque; when the resistance torque detected by the torque sensor is greater than a second set threshold, the controller controls the motor to complete the speed switching within a certain time in priority; wherein, the value of the second set threshold is greater than the value of the first set threshold.

[0008] Preferably, a silicone waterproof button for controlling the start and stop of the motor is provided on the front of the handle.

[0009] Preferably, a charging connector and a detachable end cover for covering the charging connector are provided at one end of the handle away from the U-shaped mounting frame.

[0010] Preferably, a hook is provided on the end cover.

[0011] Preferably, a first bearing adapted to the roller brush head is provided at one end of the motor waterproof housing close to the L-shaped bracket, and a second bearing adapted to the roller brush head is provided on the brush head mounting frame.

[0012] Preferably, the connecting piece is in the shape of a hexagonal prism, one end of the central hole of the roller brush head is closed, and a plug hole adapted to the connecting piece is provided at the closed end in the central hole, and the cross section of the plug hole is in the shape of a hexagon.

[0013] Preferably, the length of the roller brush head is smaller than the distance between the brush head mounting frame and the vertical portion of the L-shaped bracket.

[0014] Preferably, the roller brush head adopts an annular gradient bristle arrangement.

[0015] Preferably, the bristles of the roller brush head are made of PA6 corrugated wire with a diameter of 0.08 mm.

[0016] Preferably, the bristles of the roller brush head are provided with a nano silver ion antibacterial coating.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention restructures the rotation axis of the roller brush head to be perpendicular to the handle (i.e., a roller-type layout), and achieves a 90° spatial conversion between the drive shaft and the brush body through a horizontal U-shaped mounting bracket. The overall weight is lower than that of traditional electric shower brushes, and the roller brush head has a power-assisted rolling effect on the leather surface. In addition, the design of the battery at the handle significantly improves the balance of the force arm, and it is not easy to be fatigued during long-term use.

[0018] 2. The present invention can monitor the resistance torque of the brush head in real time and adjust the speed and torque of the motor through a PID adaptive algorithm. When the pressure is greater than a first set threshold, the motor automatically reduces the speed (by 30% rpm) and increases the output torque (by 45%) to ensure a dynamic balance between cleaning power and skin deformation.

[0019] 3. The roller brush head of the present invention adopts an annular gradient bristle arrangement (340 holes × 800 bristles / hole), combined with axial + radial compound motion (speed 0-360° stepless adjustment), which generates a vortex flow field to increase the foam penetration rate and improve the dead skin removal rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 yes Figure 1 Schematic diagram of the structure after removing the roller brush head.

[0022] Figure 3 yes Figure 2 Schematic diagram of the motor structure after removing the waterproof casing.

[0023] Figure 4 It is a schematic diagram of the internal structure of the roller brush head.

[0024] The numbers in the accompanying drawings are: 1. handle; 11. silicone waterproof button; 12. end cover; 13. hook; 2. U-shaped mounting bracket; 21. L-shaped bracket; 22. brush head mounting bracket; 23. roller brush head; 24. motor waterproof housing; 25. motor; 26. connector; 27. first bearing; 28. second bearing. DETAILED DESCRIPTION

[0025] Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments are only used to illustrate the present invention and are not used in limiting the scope of the present invention.In addition, should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the application equally.

[0026] Example: As shown in the attached Figure 1-4As shown, the present invention is a three-dimensional electric shower brush, comprising a handle 1. Preferably, the handle 1 is provided with anti-slip grooves. A U-shaped mounting bracket 2 is provided at an angle at one end of the handle 1. The U-shaped mounting bracket 2 comprises an L-shaped bracket 21 fixedly connected to the handle 1 and a brush head mounting bracket 22 provided at one end of the L-shaped bracket 21 and detachably connected to the L-shaped bracket 21. A quick-release structure can be adopted between the brush head mounting bracket 22 and the L-shaped bracket 21. The horizontal portion of the L-shaped bracket 21 is fixedly connected to the handle 1, and the brush head mounting bracket 22 is detachably connected to the horizontal portion of the L-shaped bracket 21. A plug-in portion can be provided on one side of one end of the brush head mounting bracket 22. A brush head mounting bracket 22 is provided on the horizontal portion of the L-shaped bracket 21. The plug-in part is adapted to the plug-in slot, and the plug-in part is locked by a locking mechanism after being inserted into the plug-in slot. The locking mechanism can be a locking screw arranged on the L-shaped bracket 21. After one end of the locking screw is screwed into the plug-in slot, it cooperates with the positioning hole on the plug-in part to lock the plug-in part in the plug-in slot; the locking mechanism can also be an elastic member (such as a V-shaped spring clip) arranged on the plug-in part, one end of the elastic member is fixedly connected to the plug-in part, and the other end is provided with a hollow marble, and a limiting hole adapted to the hollow marble is provided on the outer wall of the horizontal part of the L-shaped bracket 21, and the limiting hole is connected to the plug-in slot.

[0027] The brush head mounting frame 22 is rotatably provided with a roller brush head 23 on one side close to the L-shaped bracket 21. The roller brush head 23 is perpendicular to the handle 1. Preferably, a second bearing 28 adapted to the roller brush head 23 is provided on the brush head mounting frame 22. The present invention makes the brush head mounting frame 22, the roller brush head 23, and the second bearing 28 into an assembly, which is combined with the connecting piece 26 on the motor 25, and can be disassembled and assembled by simply pushing and pulling.

[0028] A motor waterproof housing 24 adapted to the roller brush head 23 is horizontally provided on the inner side of the L-shaped bracket 21. A motor 25 for driving the roller brush head 23 to rotate is provided in the motor waterproof housing 24. The motor 25 and the motor waterproof housing 24 are first fixed with four screws and then locked to the L-shaped bracket 21 with three screws. Guide grooves are set for installation. The output shaft of the motor 25 extends outward from the motor waterproof housing 24, and a connector 26 for transmission connection with the roller brush head 23 is provided at one end of the output shaft extending from the motor waterproof housing 24. The connector 26 is detachably connected to the roller brush head 23, and a center hole adapted to the motor waterproof housing 24 is provided in the roller brush head 23. A torque sensor for detecting the resistance torque of the output shaft of the motor 25 is provided on the motor 25 or the motor waterproof housing 24. The torque sensor and the motor 25 are both connected to the controller signal in the handle 1. When the resistance torque detected by the torque sensor is greater than a first set threshold, the controller controls the motor 25 to automatically reduce the speed and increase the torque; when the resistance torque detected by the torque sensor is greater than a second set threshold, the controller controls the motor 25 to preferentially complete the speed switching within a certain time; wherein, the value of the second set threshold is greater than the value of the first set threshold.

[0029] Preferably, a silicone waterproof button 11 for controlling the start and stop of the motor 25 is provided at the front of the handle 1. The silicone waterproof button 11 is locked with a button waterproof fastener and four screws, so that its silicone pressing rate is 20%-25%.

[0030] Preferably, a charging connector and a detachable end cap 12 for covering the charging connector are provided at the end of the handle 1 away from the U-shaped mounting frame 2. A rotating snap-fit structure or a threaded connection structure may be adopted between the end cap 12 and the handle 1.

[0031] Furthermore, a hook 13 is provided on the end cover 12 to facilitate storage of the present invention.

[0032] Preferably, in order to reduce rolling friction, a first bearing 27 adapted to the roller brush head 23 is provided at one end of the motor waterproof housing 24 close to the L-shaped bracket 21 .

[0033] Preferably, the connecting member 26 is in the shape of a hexagonal prism, one end of the center hole of the roller brush head 23 is closed, and a plug hole adapted to the connecting member 26 is provided at the closed end in the center hole, and the cross-section of the plug hole is hexagonal. The roller brush head 23 and the connecting member 26 are connected by plugging, and when the brush head mounting frame 22 is installed on the L-shaped bracket 21, the transmission connection between the roller brush head 23 and the connecting member 26 is completed.

[0034] Preferably, the length of the roller brush head 23 is smaller than the distance between the brush head mounting frame 22 and the vertical portion of the L-shaped bracket 21 , so that the roller brush head 23 can slide along the axial direction of the roller brush head 23 .

[0035] Preferably, the roller brush head 23 adopts an annular gradient bristle arrangement.

[0036] Preferably, the bristles of the roller brush head 23 are made of PA6 corrugated wire with a diameter of 0.08 mm, the density is increased by 40%, and the bending modulus is optimized to 2.8 GPa.

[0037] Preferably, the bristles of the roller brush head 23 are provided with a nano silver ion antibacterial coating, which reduces the total colony count by 80%.

[0038] The motor adopts current load identification technology to reduce system power consumption, operating temperature and noise.

[0039] The present invention adopts an orthogonal torque balance design, reconstructing the traditional brush head rotation axis to be perpendicular to the handheld body, and realizing a 90° spatial conversion between the drive axis and the brush body through a horizontal U-shaped mounting bracket 2; the center of gravity is moved backward (the center of mass offset is reduced by 58%), the lever arm ratio is optimized to 1:1.5, and the wrist load is reduced by 40%.

[0040] The present invention adopts a three-dimensional cleaning topology structure, and the brush head adopts an independent suspended roller, such as a circular gradient arrangement of 340 holes × 800 bristles / hole; axial + radial compound motion (0-360° stepless adjustment) generates a vortex flow field to improve the foam penetration rate; the dead skin removal rate and gap coverage are significantly improved compared with the traditional disc type.

[0041] This invention utilizes a PID adaptive algorithm and a speed reduction and torque increase algorithm when encountering resistance: The system monitors the resistance torque in real time, automatically reducing the speed by 30% rpm and increasing the torque by 45% when the pressure exceeds 2kg. It also models skin deformation in real time: when the contact surface pressure exceeds 2.5kg, the torque priority mode is triggered, and speed switching is completed within 200ms. In the position loop, feedforward compensation PID is used to achieve an angle deviation of ±0.5°; in the speed loop, a sliding mode observer is used to achieve speed fluctuations of less than ±1%; and in the current loop, SVPWM space vector control is used, achieving a torque control accuracy of ±0.5%.

[0042] The overall structure of the present invention conforms to the natural force application direction of the human body (grip angle 115°±5°), which can improve the intuitiveness of operation; combined with the "cavitation effect", it stimulates micron-level bubbles (particle size <50μm), improves the efficiency of keratin softening and promotes blood circulation; the lightweight structure reduces the weight of the whole machine by 35%, and combined with the rolling-assisted push-pull and non-slip textured handle, it can achieve seamless switching between bathing and massage modes.

Claims

1. A three-dimensional electric bath brush comprising a handle (1), characterized in that: A U-shaped mounting frame (2) is obliquely provided at one end of the handle (1), and the U-shaped mounting frame (2) comprises an L-shaped bracket (21) fixedly connected to the handle (1) and a brush head mounting frame (22) provided at one end of the L-shaped bracket (21) and detachably connected to the L-shaped bracket (21); a roller brush head (23) is rotatably provided on one side of the brush head mounting frame (22) close to the L-shaped bracket (21), and the roller brush head (23) is perpendicular to the handle (1); a motor waterproof housing (24) adapted to the roller brush head (23) is horizontally provided on the inner side of the L-shaped bracket (21), and a motor (25) for driving the roller brush head (23) to rotate is provided in the motor waterproof housing (24), and an output shaft of the motor (25) extends outward from the motor waterproof housing (24) and a portion of the output shaft extending out of the motor waterproof housing (24) is provided. The end of the handle (1) is provided with a connecting piece (26) for transmission connection with the roller brush head (23), the connecting piece (26) is detachably connected to the roller brush head (23), and a center hole adapted to the motor waterproof housing (24) is provided in the roller brush head (23), the motor (25) or the motor waterproof housing (24) is provided with a torque sensor for detecting the resistance torque of the output shaft of the motor (25), the torque sensor and the motor (25) are both connected to the controller signal in the handle (1), when the resistance torque detected by the torque sensor is greater than a first set threshold, the controller controls the motor (25) to automatically reduce the speed and increase the torque; when the resistance torque detected by the torque sensor is greater than a second set threshold, the controller controls the motor (25) to preferentially complete the speed switching within a certain time; wherein the value of the second set threshold is greater than the value of the first set threshold.

2. The three-dimensional electric bath brush according to claim 1, characterized in that: A silicone waterproof button (11) for controlling the start and stop of the motor (25) is provided at the front of the handle (1).

3. The three-dimensional electric bath brush according to claim 1, characterized in that: A charging connector and a detachable end cover (12) for covering the charging connector are provided at one end of the handle (1) away from the U-shaped mounting frame (2).

4. The three-dimensional electric bath brush according to claim 3, characterized in that: A hook (13) is provided on the end cover (12).

5. The three-dimensional electric bath brush according to claim 1, characterized in that: A first bearing (27) adapted to the roller brush head (23) is provided at one end of the motor waterproof housing (24) close to the L-shaped bracket (21), and a second bearing (28) adapted to the roller brush head (23) is provided on the brush head mounting frame (22).

6. The three-dimensional electric bath brush according to claim 1, characterized in that: The connecting piece (26) is in the shape of a hexagonal prism, one end of the central hole of the roller brush head (23) is closed, and a plug hole adapted to the connecting piece (26) is provided at the closed end in the central hole, and the cross section of the plug hole is in the shape of a hexagon.

7. The three-dimensional electric bath brush according to claim 1, characterized in that: The length of the roller brush head (23) is smaller than the distance between the brush head mounting frame (22) and the vertical portion of the L-shaped bracket (21).

8. The three-dimensional electric bath brush according to claim 1, characterized in that: The roller brush head (23) adopts an annular gradient bristle arrangement.

9. The three-dimensional electric bath brush according to claim 1, characterized in that: The bristles of the roller brush head (23) are made of PA6 corrugated wire with a diameter of 0.08 mm.

10. The three-dimensional electric bath brush according to claim 1, characterized in that: The bristles of the roller brush head (23) are provided with a nano silver ion antibacterial coating.

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