A rotary electric toothbrush

Abstract

The utility model provides a kind of rotary electric toothbrush, comprising: brush handle, brush head and be used to drive brush head rotary motion rotary drive assembly, the rotary drive assembly is installed in the brush handle, the brush head is connected with the rotary drive assembly. Rotary motion is driven by rotary drive assembly to brush head, so that it is more in line with correct brushing mode, can clean the gap of tooth, improve cleaning effect, reduce the discomfort caused by too large vibration, reduce the damage caused to tooth because of transverse brushing action.

Description

Technical Field

[0001] This utility model relates to the field of oral care products technology, and in particular to a rotary electric toothbrush. Background Technology

[0002] Traditional electric toothbrushes typically clean teeth by rotating or vibrating the brush head. However, these methods differ from traditional brushing techniques and dentist recommendations, resulting in uneven cleaning, excessive gum irritation, and potential tooth damage from horizontal brushing. Currently available electric toothbrushes mainly fall into two categories: 1. Rotary toothbrushes Rotary toothbrushes use an electric motor to drive a circular brush head, creating a friction effect. The drawback is that they are too forceful; while they clean the tooth surface very well, they don't reach the gaps between teeth. Furthermore, the excessive force can damage teeth by brushing horizontally, causing wear and tear.

[0003] 2. Vibrating toothbrush Vibrating toothbrushes have an internal motor that generates high-frequency vibrations in the brush head. These vibrations, occurring tens of thousands of times per minute, create numerous tiny bubbles in the toothpaste and water mixture in the mouth. The pressure generated when these bubbles burst cleans between the teeth. However, they are noisy, uncomfortable, and their cleaning effect often falls short of user expectations.

[0004] 3. Vibrating toothbrushes Vibratory toothbrushes are an upgraded version of vibrating toothbrushes, combining high-frequency vibration with some sweeping functionality. They contain an internal vibrating motor that generates high-frequency vibrations in the brush head. Based on this, the lateral oscillation force generated by the motor causes the toothbrush to move laterally a certain distance, achieving the sweeping purpose. The drawback is the small oscillation amplitude, typically around 4 millimeters up and down. In actual use, the soft bristles allow for a 4-millimeter oscillation, but this softness also creates resistance when the bristle tips touch the tooth surface, and the soft bristles also act as a shock absorber, further limiting the actual oscillation amplitude to less than 4mm. This results in less force applied to the tooth surface, failing to achieve the desired directional brushing effect.

[0005] Therefore, a new type of electric toothbrush is needed that can improve cleaning by using the bristles of a dentist-recommended toothbrush to move up and down along the gaps between teeth, and to use a gentler and more efficient rotary motion to reduce the discomfort caused by excessive vibration and the risk of damaging teeth by brushing horizontally. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a rotary electric toothbrush to address the shortcomings of the existing technology.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A rotary electric toothbrush includes: a brush handle, a brush head, and a rotary drive assembly for driving the brush head to rotate. The rotary drive assembly is installed in the brush handle, and the brush head is connected to the rotary drive assembly.

[0008] The beneficial effects of adopting the technical solution of this utility model are: by driving the brush head to rotate through the rotary drive component, it is more in line with the correct brushing method, which can clean the gaps between teeth, improve the cleaning effect, reduce the discomfort caused by excessive vibration, and reduce the damage to teeth caused by horizontal brushing action.

[0009] Furthermore, the rotary drive assembly includes: a power mechanism and a rotary drive mechanism for driving the brush head to rotate. Both the power mechanism and the rotary drive mechanism are installed in the brush handle. The power mechanism is connected to the rotary drive mechanism, and the rotary drive mechanism is detachably connected to the brush head.

[0010] The beneficial effects of adopting the above-mentioned further technical solution are: the brush head is driven to rotate by the power mechanism and the rotary drive mechanism, which conforms to the correct brushing method, can clean the gaps between teeth, improve the cleaning effect, reduce the discomfort caused by excessive vibration, and reduce the damage to teeth caused by the horizontal brushing action.

[0011] Furthermore, the rotary drive mechanism includes: a first driving wheel and a first driven wheel. The first driving wheel is connected to the power mechanism. A first sliding post is provided on the edge of the first driving wheel. A first sliding groove is provided on the first driven wheel. The first sliding post is slidably installed in the first sliding groove. The brush head is connected to the first driven wheel. The first driven wheel is a fan-shaped wheel or a rectangular wheel. The length of the first sliding groove is less than the radius of the first driven wheel. The first driving wheel and the first driven wheel have an overlapping area.

[0012] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the structural design enables the driven wheel to output rotational power axially, achieving continuous rotational motion. The brush head is connected via the output shaft, allowing it to rotate continuously, thus converting the rotational motion of the drive mechanism into the reciprocating motion of the brush head. This simplifies the structure, facilitates the installation and maintenance of various components, and reduces costs.

[0013] Furthermore, the rotary drive assembly includes: a second driving wheel, a second driven wheel, and a first connecting component. The second driving wheel is connected to the power mechanism. A second sliding column is provided on the edge of the second driving wheel, and a third sliding column is provided on the edge of the second driven wheel. One end of the first connecting component is provided with a first through hole adapted to the second sliding column, and the other end of the first connecting component is provided with a second sliding groove adapted to the third sliding column. The second sliding column is rotatably installed in the first through hole, and the third sliding column is slidably installed in the second sliding groove. The brush head is connected to the second driven wheel. The first connecting component is a plate or a rod. Both the second driving wheel and the second driven wheel are round wheels.

[0014] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the structural design enables the driven wheel to output rotational power axially, achieving continuous rotational motion. The brush head is connected via the output shaft, allowing it to rotate continuously, thus converting the rotational motion of the drive mechanism into the reciprocating motion of the brush head. This simplifies the structure, facilitates the installation and maintenance of various components, and reduces costs.

[0015] Furthermore, the rotary drive assembly includes: a third driving wheel, a third driven wheel, and a second connecting component. The third driving wheel is connected to the power mechanism. A second through hole is provided on the edge of the third driving wheel. A third sliding groove is provided on the third driven wheel. One end of the second connecting component is rotatably installed in the second through hole, and the other end of the second connecting component is slidably installed in the third sliding groove. The brush head is connected to the third driven wheel. The second connecting component is a U-shaped steel wire or a U-shaped rod. Both the third driving wheel and the third driven wheel are round wheels.

[0016] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the structural design enables the driven wheel to output rotational power axially, achieving continuous rotational motion. The brush head is connected via the output shaft, allowing it to rotate continuously, thus converting the rotational motion of the drive mechanism into the reciprocating motion of the brush head. This simplifies the structure, facilitates the installation and maintenance of various components, and reduces costs.

[0017] Furthermore, the rotary drive assembly includes: a fourth driving wheel, a fourth driven wheel, and an elastic component for resetting the fourth driven wheel. The fourth driving wheel is connected to the power mechanism. A fourth sliding column is provided on the edge of the fourth driving wheel. A sliding groove notch is provided on the edge of the fourth driven wheel. The sliding groove notch is located on the movement trajectory of the fourth sliding column. The two ends of the elastic component are respectively connected to the fourth driven wheel and the brush handle. The fourth driving wheel and the fourth driven wheel have an overlapping area.

[0018] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the structural design enables the driven wheel to output rotational power axially, achieving continuous rotational motion. The brush head is connected via the output shaft, allowing it to rotate continuously, thus converting the rotational motion of the drive mechanism into the reciprocating motion of the brush head. This simplifies the structure, facilitates the installation and maintenance of various components, and reduces costs.

[0019] Furthermore, the elastic component is a tension spring or a compression spring, and the length of the groove notch is less than the radius of the fourth driven wheel; both the fourth driving wheel and the fourth driven wheel are round wheels.

[0020] The beneficial effects of adopting the above-mentioned further technical solution are: the elastic component is a tension spring or a compression spring, which facilitates suspension according to actual needs and improves applicability. The length of the groove notch is less than the radius of the fourth driven wheel, which facilitates the sliding column sliding into and out of the groove notch.

[0021] Furthermore, the power mechanism includes a motor and a reduction mechanism. The motor is connected to a battery and is connected to the rotary drive mechanism through the reduction mechanism. A stop block for limiting the rotary drive mechanism is provided inside the brush handle. The rotary drive mechanism is detachably connected to the brush head through an output shaft.

[0022] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: The deceleration mechanism is used to reduce the rotational speed of the power mechanism, thereby reducing the rotational speed of the brush head, making the toothbrush's rotational speed more consistent with the rate of manual brushing, improving comfort and enhancing the user experience. The stop block is used to limit the rotational amplitude of the rotary drive mechanism, thereby limiting the rotational amplitude of the brush head, improving the toothbrush's comfort, stability, and reliability.

[0023] Furthermore, the reduction mechanism consists of multiple sets of reduction gears, and the output shaft is mounted on the brush handle via bearings. One end of the output shaft passes through the brush handle and is exposed on the outside. One end of the output shaft is provided with a slot for detachably installing the brush head.

[0024] The beneficial effects of adopting the above-mentioned further technical solution are as follows: The multiple sets of reduction gears reduce the rotational speed of the power mechanism, thereby reducing the brush head's rotational speed. This makes the toothbrush's rotational speed more consistent with the rate of manual brushing, improving comfort and enhancing the user experience. The output shaft connects to the outside of the brush handle for mounting replaceable brush heads. The output shaft extends from the brush handle to drive the brush head's rotational movement. The slot design facilitates engagement with the brush head, simplifying installation and removal.

[0025] Furthermore, the battery is a rechargeable battery, which is connected to a control chip via a power switch. The control chip is connected to a charging connector, and the motor is connected to the control chip. The charging connector is mounted on the brush handle, and a battery compartment for mounting the battery is provided in the brush handle. The battery is mounted in the battery compartment. The brush head has a bristle area, the length of the brush head is 85mm, the total thickness of the brush head and the bristle area is 15mm, the length of the bristle area is 28mm, and the width of the bristle area is 8mm.

[0026] The beneficial effects of adopting the above-mentioned further technical solutions are: the battery is a rechargeable battery, which facilitates electromagnetic recycling; the charging connector facilitates charging the battery with an external charger; the battery compartment facilitates battery installation and maintenance; and the narrow brush head design facilitates brush head rotation in the mouth, improving flexibility and enhancing the user experience.

[0027] The advantages of this invention in its additional aspects 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

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort, and they are also within the scope of this patent right.

[0029] Figure 1 This is one of the structural schematic diagrams of a rotary electric toothbrush provided in an embodiment of the present utility model.

[0030] Figure 2 This is one of the structural schematic diagrams of the rotary drive assembly provided in the embodiments of this utility model.

[0031] Figure 3 This is the second schematic diagram of the rotary drive assembly provided in this embodiment of the utility model.

[0032] Figure 4 The third schematic diagram of the rotary drive assembly provided in this embodiment of the utility model.

[0033] Figure 5 The fourth schematic diagram of the rotary drive assembly provided in this embodiment of the present utility model.

[0034] Figure 6 The fifth schematic diagram of the rotary drive assembly provided in this embodiment of the utility model.

[0035] Figure 7 This is a schematic diagram of the deceleration mechanism provided in an embodiment of the present utility model.

[0036] Figure 8 This is one of the structural schematic diagrams of the brush head provided in the embodiment of this utility model.

[0037] Figure 9 The second schematic diagram of the brush head provided in this embodiment of the utility model.

[0038] Explanation of reference numerals in the attached diagram: 1. Brush handle; 2. Brush head; 3. Rotary drive assembly; 4. First drive wheel; 5. First driven wheel; 6. First slide column; 7. First slide groove; 8. Second drive wheel; 9. Second driven wheel; 10. First connecting component; 11. Second slide column; 12. Second slide groove; 13. Third slide column; 14. Third drive wheel; 15. Third driven wheel; 16. Second connecting component; 17. Third slide groove; 18. Fourth drive wheel; 19. Fourth driven wheel; 20. Fourth slide column; 21. Slide groove notch; 22. Tension spring; 23. Compression spring; 24. Motor; 25. Reduction mechanism; 26. Battery; 27. Output shaft. Detailed Implementation

[0039] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0044] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 utility model according to the specific circumstances.

[0045] like Figures 1 to 9 As shown, this utility model embodiment provides a rotary electric toothbrush, including: a brush handle 1, a brush head 2, and a rotary drive assembly 3 for driving the brush head 2 to rotate. The rotary drive assembly 3 is installed in the brush handle 1, and the brush head 2 is connected to the rotary drive assembly 3.

[0046] The beneficial effects of adopting the technical solution of this utility model are: by driving the brush head to rotate through the rotary drive component, it is more in line with the correct brushing method, which can clean the gaps between teeth, improve the cleaning effect, reduce the discomfort caused by excessive vibration, and reduce the damage to teeth caused by horizontal brushing action.

[0047] The brush handle can be a cylindrical, triangular, cuboid, or cube structure.

[0048] This utility model provides a rotary electric toothbrush, which is an electric toothbrush with a rotary motion mode for brushing teeth. It includes a toothbrush handle and a brush head. The toothbrush handle has a rotary drive assembly inside, which includes a motor drive mechanism, a reduction gear, main rotating wheels (first driving wheel, second driving wheel, third driving wheel, and fourth driving wheel), and driven wheels (first driven wheel, second driven wheel, third driven wheel, and fourth driven wheel) connected by a slide rod (or slide groove). The driven wheels output rotary power axially, achieving continuous rotary motion from 30 degrees to 90 degrees. The toothbrush head is connected to the driven shaft (output shaft), enabling continuous rotation (reciprocating oscillation) of the toothbrush head. This device is an electric toothbrush that can simulate the trajectory of manual brushing.

[0049] The drive mechanism includes: a battery-powered micro motor (motor), a gear mounted on the motor shaft for connecting a reduction gear (reduction mechanism), and generally three sets of reduction gears.

[0050] A circular wheel (first driving wheel, second driving wheel, third driving wheel and fourth driving wheel) is installed at the end of the reduction gear. A cylinder (sliding column) that can slide (slide relative to the first driven gear) is installed on the rim of the driving wheel. The cylinder (sliding column) installed on the rim of the driving wheel is connected to the driven wheel. The driven wheel has a larger diameter and can cover the driving wheel. The driven wheel has a through hole in the direction of the diameter of the driving wheel to form a sliding groove. The cylinder (first sliding column) of the driving wheel (first driving wheel) is fitted into the sliding groove (first sliding groove) of the driven wheel (first driven wheel) so that the cylinder and the sliding groove slide against each other.

[0051] A driven wheel with a fixed shaft has a central drive shaft (output shaft) that is connected to the outside of the handle (brush handle) for mounting a toothbrush with a replaceable brush head.

[0052] The connecting end (the shaft connecting the brush head, i.e. the output shaft) is driven by an eccentric element to rotate and reciprocate around a fixed shaft, and the output end rotates and reciprocates along the longitudinal axis of the motor shaft (motor shaft). Thus, the drive unit (rotary drive assembly) of this utility model can convert rotational motion into rotary reciprocating motion.

[0053] The rotary toothbrush has an adjustable rotation angle from 30 to 90 degrees, and the rotation speed and angle are controllable.

[0054] like Figures 1 to 9 As shown, the rotary drive assembly 3 further includes a power mechanism and a rotary drive mechanism for driving the brush head 2 to rotate. Both the power mechanism and the rotary drive mechanism are installed in the brush handle 1. The power mechanism is connected to the rotary drive mechanism, and the rotary drive mechanism is detachably connected to the brush head 2.

[0055] The beneficial effects of adopting the above-mentioned further technical solution are: the brush head is driven to rotate by the power mechanism and the rotary drive mechanism, which conforms to the correct brushing method, can clean the gaps between teeth, improve the cleaning effect, reduce the discomfort caused by excessive vibration, and reduce the damage to teeth caused by the horizontal brushing action.

[0056] The rotary drive mechanism includes the following configurations: like Figure 2 As shown, the rotary drive mechanism further includes: a first driving wheel 4 and a first driven wheel 5. The first driving wheel 4 is connected to the power mechanism. A first sliding post 6 is provided on the edge of the first driving wheel 4. A first sliding groove 7 is provided on the first driven wheel 5. The first sliding post 6 is slidably installed in the first sliding groove 7. The brush head 2 is connected to the first driven wheel 5. The first driven wheel 5 is a fan-shaped wheel or a rectangular wheel. The length of the first sliding groove 7 is less than the radius of the first driven wheel 5. The first driving wheel 4 and the first driven wheel 5 have an overlapping area.

[0057] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the structural design enables the driven wheel to output rotational power axially, achieving continuous rotational motion. The brush head is connected via the output shaft, allowing it to rotate continuously, thus converting the rotational motion of the drive mechanism into the reciprocating motion of the brush head. This simplifies the structure, facilitates the installation and maintenance of various components, and reduces costs.

[0058] The brush head's axis can be perpendicular to the driven wheel. The output shaft 27 can be connected to the middle of the driven wheel. The driving wheel can be directly and fixedly connected to the last reduction gear of the reduction mechanism. The first driving wheel can be a circular wheel. The first slide groove can be a long, narrow slide groove.

[0059] The two-wheel overlapping groove structure consists of a first driving wheel that has been reduced in speed and a first driven wheel that is driven. A sliding post (first sliding post 6) is installed on the edge of the first driving wheel. A groove through hole (first groove 7) smaller than the radius of the first driven wheel is opened on the first driven wheel. The first driving wheel and the first driven wheel are partially overlapped. The sliding post (first sliding post 6) of the first driving wheel is inserted into the groove (first groove 7) of the first driven wheel. When the first driving wheel is running normally, the first driven wheel will rotate. The rotation speed of the first driven wheel is obtained by the reduction speed of the motor or gear (reduction mechanism) in front of the first driving wheel. The rotation angle of the first driven wheel can be adjusted by the length and width of the groove (first groove 7) of the first driven wheel. Its rotation angle can be freely adjusted from 30 to 90 degrees. Based on this structure, the rotating (rotating) brushing action of the electric toothbrush is realized.

[0060] A cylinder (first sliding column) mounted on the rim of the first driving wheel is connected to the first driven wheel. The first driven wheel has a larger diameter and can cover the first driving wheel. The first driven wheel has a through hole in the direction of the diameter of the first driving wheel to form a sliding groove (first sliding groove). The cylinder (first sliding column) of the first driving wheel is fitted into the sliding groove (first sliding groove) of the first driven wheel so that they slide against each other. A limiting point (stop block) is designed so that the first driven wheel can reciprocate within the range of 30-90 degrees.

[0061] like Figure 3 As shown, the rotary drive assembly further includes: a second driving wheel 8, a second driven wheel 9, and a first connecting component 10. The second driving wheel 8 is connected to the power mechanism. A second sliding column 11 is provided on the edge of the second driving wheel 8, and a third sliding column 13 is provided on the edge of the second driven wheel 9. One end of the first connecting component 10 is provided with a first through hole adapted to the second sliding column 11, and the other end of the first connecting component 10 is provided with a second sliding groove 12 adapted to the third sliding column 13. The second sliding column 11 is rotatably installed in the first through hole, and the third sliding column 13 is slidably installed in the second sliding groove 12. The brush head 2 is connected to the second driven wheel 9. The first connecting component 10 is a plate or a rod. Both the second driving wheel 8 and the second driven wheel 9 are round wheels.

[0062] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the structural design enables the driven wheel to output rotational power axially, achieving continuous rotational motion. The brush head is connected via the output shaft, allowing it to rotate continuously, thus converting the rotational motion of the drive mechanism into the reciprocating motion of the brush head. This simplifies the structure, facilitates the installation and maintenance of various components, and reduces costs.

[0063] The second driving wheel has a cylindrical connecting piece (first connecting component) mounted on its rim. One end of the connecting piece (first connecting component) has a round hole, and the other end has a long, narrow through hole (second sliding groove). The round hole end of the connecting piece (first connecting component) connects to the cylindrical connecting piece (second sliding piece) on the rim of the second driving wheel, allowing it to rotate. The through hole end of the connecting piece (first connecting component) connects to the second driven wheel. The rim of the second driven wheel has a cylindrical connecting piece (first connecting component) mounted on its rim, allowing it to slide. Limit points are designed to allow the second driven wheel to reciprocate within a 30-90 degree range. The second sliding groove can be a long, narrow groove.

[0064] like Figure 4As shown, the rotary drive assembly further includes: a third driving wheel 14, a third driven wheel 15, and a second connecting component 16. The third driving wheel 14 is connected to the power mechanism. The edge of the third driving wheel 14 is provided with a second through hole. The third driven wheel 15 is provided with a third sliding groove 18. One end of the second connecting component 16 is rotatably installed in the second through hole, and the other end of the second connecting component 16 is slidably installed in the third sliding groove 17. The brush head 2 is connected to the third driven wheel 15. The second connecting component 16 is a U-shaped steel wire or a U-shaped rod. Both the third driving wheel 14 and the third driven wheel 15 are round wheels.

[0065] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the structural design enables the driven wheel to output rotational power axially, achieving continuous rotational motion. The brush head is connected via the output shaft, allowing it to rotate continuously, thus converting the rotational motion of the drive mechanism into the reciprocating motion of the brush head. This simplifies the structure, facilitates the installation and maintenance of various components, and reduces costs.

[0066] The second connecting component 16 can be a U-shaped rigid steel wire or a U-shaped rigid rod. The third slide can be a long strip slide.

[0067] The third driving wheel has a hole drilled in its rim to facilitate the insertion of a connecting wire (the second connecting component). One end of the connecting wire (the second connecting component) is connected to the hole left in the rim of the third driving wheel, allowing one end of the second connecting component to rotate. The other end of the connecting wire (the second connecting component) is connected to the third driven wheel. The third driven wheel has a through hole in the direction of the diameter pointing towards the third driving wheel to form a groove (the third groove). The connecting wire (the second connecting component) is inserted into the groove, allowing it (the other end of the second connecting component) to slide. A limiting point (stop block) is designed to allow the third driven wheel to reciprocate within a range of 30-90 degrees.

[0068] like Figure 5 and Figure 6 As shown, the rotary drive assembly further includes: a fourth driving wheel 18, a fourth driven wheel 19, and an elastic component for resetting the fourth driven wheel 19. The fourth driving wheel 18 is connected to the power mechanism. A fourth sliding column 20 is provided on the edge of the fourth driving wheel 18. A sliding groove notch 21 is provided on the edge of the fourth driven wheel 19. The sliding groove notch 21 is located on the movement trajectory of the fourth sliding column 20. The two ends of the elastic component are respectively connected to the fourth driven wheel 19 and the brush handle 1. The fourth driving wheel 18 and the fourth driven wheel 19 have an overlapping area.

[0069] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the structural design enables the driven wheel to output rotational power axially, achieving continuous rotational motion. The brush head is connected via the output shaft, allowing it to rotate continuously, thus converting the rotational motion of the drive mechanism into the reciprocating motion of the brush head. This simplifies the structure, facilitates the installation and maintenance of various components, and reduces costs.

[0070] The opening of the groove notch 21 is rounded to facilitate the sliding column's entry into and exit from the groove notch, preventing jamming. The groove notch can be a teardrop-shaped through hole with an opening.

[0071] like Figure 5 and Figure 6 As shown, the elastic component is a tension spring 22 or a compression spring 23, and the length of the groove notch 21 is less than the radius of the fourth driven wheel 19; both the fourth driving wheel 18 and the fourth driven wheel 19 are round wheels.

[0072] The beneficial effects of adopting the above-mentioned further technical solution are: the elastic component is a tension spring or a compression spring, which facilitates suspension according to actual needs and improves applicability. The length of the groove notch is less than the radius of the fourth driven wheel, which facilitates the sliding column sliding into and out of the groove notch.

[0073] like Figure 1 As shown, the power mechanism further includes a motor 24 and a reduction mechanism 25. The motor 24 is connected to a battery 26. The motor 24 is connected to the rotary drive mechanism through the reduction mechanism 25. A stop block for limiting the rotary drive mechanism is provided inside the brush handle 1. The rotary drive mechanism is detachably connected to the brush head 2 through an output shaft 27.

[0074] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: The deceleration mechanism is used to reduce the rotational speed of the power mechanism, thereby reducing the rotational speed of the brush head, making the toothbrush's rotational speed more consistent with the rate of manual brushing, improving comfort and enhancing the user experience. The stop block is used to limit the rotational amplitude of the rotary drive mechanism, thereby limiting the rotational amplitude of the brush head, improving the toothbrush's comfort, stability, and reliability.

[0075] The motor's axis can be set parallel to the brush handle's axis, and the driven wheel can swing along a plane perpendicular to the motor's axis.

[0076] like Figure 1 As shown, the reduction mechanism 25 further comprises multiple sets of reduction gears. The output shaft 27 is mounted on the brush handle 1 via bearings. One end of the output shaft 27 passes through the brush handle 1 and is exposed on the outside. One end of the output shaft 27 is provided with a slot for detachably mounting the brush head 2.

[0077] The beneficial effects of adopting the above-mentioned further technical solution are as follows: The multiple sets of reduction gears reduce the rotational speed of the power mechanism, thereby reducing the brush head's rotational speed. This makes the toothbrush's rotational speed more consistent with the rate of manual brushing, improving comfort and enhancing the user experience. The output shaft connects to the outside of the brush handle for mounting replaceable brush heads. The output shaft extends from the brush handle to drive the brush head's rotational movement. The slot design facilitates engagement with the brush head, simplifying installation and removal.

[0078] The driven wheel is fixed to the output shaft, which is then fixed to a miniature bearing mounted on the output end of the handle (brush handle). This miniature bearing is waterproofed. The output shaft has a 2.5-3cm long end with a bevel (or slot) for connecting the toothbrush head. The toothbrush head can be a narrow bristle head with only 2-3 rows of bristles.

[0079] like Figure 7 As shown, the reduction mechanism may include: a first reduction gear, a second reduction gear, a third reduction gear, and a fourth reduction gear. A motor gear is mounted on the motor shaft. The motor gear meshes with the first reduction gear. Both the first and second reduction gears are rotatably mounted in the brush handle via a bracket or support rod. The second reduction gear meshes with the third reduction gear. Both the third and fourth reduction gears are rotatably mounted in the brush handle via a bracket or support rod. The fourth reduction gear meshes with or is connected to the drive wheel, which is rotatably mounted in the brush handle via a bracket or support rod. The diameter of the first reduction gear is larger than the diameter of the motor gear, and the diameter of the third reduction gear is larger than the diameter of the second reduction gear. The second reduction gear is located above the first reduction gear, the drive wheel is located above the second reduction gear, the third reduction gear is located above the motor gear, the fourth reduction gear is located above the third reduction gear, and the driven wheel is located above the fourth reduction gear. The motor may be located between the battery and the reduction mechanism.

[0080] The first and second reduction gears can be fixedly connected coaxially, and the third and fourth reduction gears can be fixedly connected coaxially.

[0081] like Figure 1As shown, further, the battery 26 is a rechargeable battery, the battery 26 is connected to a control chip via a power switch, the control chip is connected to a rechargeable connector, the motor 24 is connected to the control chip, the rechargeable connector is installed on the brush handle 1, the brush handle 1 is provided with a battery box for installing the battery 26, and the battery 26 is installed in the battery box; the brush head 2 is provided with a bristle area, the length of the brush head is 85mm, the total thickness of the brush head and the bristle area is 15mm, the length of the bristle area is 28mm, and the width of the bristle area is 8mm.

[0082] The beneficial effects of adopting the above-mentioned further technical solutions are: the battery is a rechargeable battery, which facilitates electromagnetic recycling; the charging connector facilitates charging the battery with an external charger; the battery compartment facilitates battery installation and maintenance; and the narrow brush head design facilitates brush head rotation in the mouth, improving flexibility and enhancing the user experience.

[0083] The toothbrush handle (handle 1) has a battery compartment at its bottom, and a charging connector on its outside. The handle (handle 1) also houses a control chip and a power switch, which controls power supply and speed.

[0084] The bristle area can include multiple rows of bristles. The brush head can be made of plastic.

[0085] This utility model embodiment provides a rotary electric toothbrush, including a toothbrush handle (brush handle 1) and a brush head 2. The toothbrush handle (brush handle 1) is internally equipped with a battery box, an electronic control component (control chip), and a rotary drive component. The rotary drive component includes: a drive motor (motor), a reduction gear set (reduction mechanism), and a set of transmission wheels (driving wheel and driven wheel) with slide rails. The center of the transmission wheel (driven wheel) is connected to an output shaft 27. The output shaft extends out of the toothbrush handle (brush handle) to drive the connected brush head (brush head) to achieve rotary motion. The toothbrush head (brush head 2) is a special narrow strip type brush.

[0086] The drive assembly (drive mechanism) includes a small motor (motor) and a reduction gear set (reduction mechanism). There are three sets of small motors (motors) and reduction gear sets (reduction mechanisms). The final gear speed after reduction is 60-180 rpm.

[0087] The last stage of the reduction gear set (reduction mechanism) is equipped with a round wheel (driven wheel), and the rim of the round wheel (driven wheel) is fitted with a sliding cylinder (sliding cylinder).

[0088] The following describes various structural components used in electric toothbrushes to achieve rotation (spinning), including motors, gears, and sliding grooves.

[0089] Double-wheel overlapping sliding groove structure The first driving wheel is a decelerated driving wheel, and the first driven wheel is a driven wheel. A sliding column (first sliding column) is installed on the edge of the first driving wheel, and a through hole (first sliding groove) with a radius smaller than that of the first driven wheel is opened on the first driven wheel. The first driving wheel and the first driven wheel are partially overlapped. The sliding column (first sliding column) of the first driving wheel is inserted into the sliding groove (first sliding groove) of the first driven wheel. When the first driving wheel is running normally, the first driven wheel will rotate. The rotation speed of the first driven wheel is obtained by the motor or gear reduction (reduction mechanism) in front of the first driving wheel. The rotation angle of the first driven wheel can be adjusted by the length and width of the sliding groove (first sliding groove) of the first driven wheel. Alternatively, a stop block can be set in the mounting cavity so that the rotation angle can be freely adjusted from 30 to 90 degrees. Based on this structure, the rotation (spinning) brushing action of the electric toothbrush (rotary electric toothbrush) is realized.

[0090] Two-wheel eccentric slider (strip) structure The second driving wheel is the driving wheel after reduction, and the second driven wheel is the driven wheel. A sliding column (second sliding column 11) is installed on the edge of the second driving wheel, and a sliding column (third sliding column 12) is also installed on the edge of the second driven wheel. A connecting piece (strip) is used, with a suitable hole drilled at one end and a groove through hole (second groove) smaller than the radius of the second driven wheel drilled at the other end. The single-hole end is installed on the second driving wheel, ensuring that it can rotate. The groove head part of the connecting piece (rod) (second groove) is installed on the fixed end of the second driven wheel. (Third sliding column), and ensure that the connecting piece (strip) slide groove (second slide groove) and the second driven wheel can slide smoothly. When the second driving wheel is running normally, the second driven wheel will rotate. The rotation speed of the second driven wheel is obtained by the motor or gear reduction in front of the second driving wheel. The rotation angle of the second driven wheel can be adjusted by the length and width of the slide groove (second slide groove) of the first connecting component. Alternatively, a stop block can be set in the mounting cavity so that the rotation angle can be freely adjusted from 30 to 90 degrees. Based on this structure, the rotation (spinning) brushing action of the electric toothbrush is realized.

[0091] Two-wheel eccentric hook sliding structure The third driving wheel is the driving wheel after deceleration, and the third driven wheel is the driven wheel. A suitable hole is drilled on the edge of the third driving wheel, and a through hole (third groove) smaller than the radius of the third driven wheel is opened on the third driven wheel. The third driving wheel and the third driven wheel are connected by a steel wire or similar hook rod component (second connecting component). One end of the connecting hook steel wire (rod) is inserted into the preset hole of the third driving wheel to ensure smooth rotation, and the other end of the connecting hook steel wire (rod) is inserted into the groove (third groove) of the third driven wheel. When the third driving wheel is running normally, the third driven wheel will rotate. The rotation speed of the third driven wheel is obtained by the motor or gear reduction (reduction mechanism) in front of the third driving wheel. The rotation angle of the third driven wheel can be adjusted by the length and width of the groove (third groove) of the third driven wheel. Alternatively, a stop block can be set in the mounting cavity to allow the rotation angle to be freely adjusted from 30 to 90 degrees. Based on this structure, the rotating (rotating) brushing action of the electric toothbrush is realized.

[0092] Double-wheel overlapping groove tension spring structure The fourth driving wheel is the driving wheel after reduction, and the fourth driven wheel is the driven wheel. A sliding column (fourth sliding column 20) is installed on the edge of the fourth driving wheel. A groove notch 21 smaller than the radius of the fourth driven wheel is opened on the fourth driven wheel. The fourth driving wheel and the fourth driven wheel are partially overlapped. The sliding column (fourth sliding column) of the fourth driving wheel is inserted into the groove notch of the fourth driven wheel. When the fourth driving wheel is running normally, the fourth driven wheel is pushed radially by the fourth sliding column on the fourth driving wheel. When the sliding column (fourth sliding column) of the fourth driving wheel slides... When the fourth driven wheel exits the notch (slide groove notch), the tension spring 22 set on the fourth driven wheel returns the fourth driven wheel to the origin. At this time, the fourth driven wheel has completed one rotation. The rotation speed of the fourth driven wheel is obtained by the motor or gear reduction in front of the fourth driving wheel. The rotation angle of the fourth driven wheel can be adjusted by the length of the slide groove (slide groove notch) and the width of the fourth driving wheel and the slide column (fourth slide column). Its rotation angle can be freely adjusted from 30 to 90 degrees. Based on this structure, the rotation (spinning) brushing action of the electric toothbrush is realized.

[0093] Double-wheel overlapping groove compression spring structure The fourth driving wheel is the driving wheel after reduction, and the fourth driven wheel is the driven wheel. A sliding column (fourth sliding column) is installed on the edge of the fourth driving wheel. A groove notch smaller than the radius of the fourth driven wheel is opened on the fourth driven wheel. The fourth driving wheel and the fourth driven wheel are partially overlapped. The sliding column (fourth sliding column) of the fourth driving wheel is inserted into the groove notch of the fourth driven wheel. When the fourth driving wheel is running normally, the fourth driven wheel is pushed radially by the sliding column (fourth sliding column) of the fourth driving wheel. When the fourth driven wheel slides out of the notch (slide groove notch), the compression spring on the fourth driven wheel returns it to its original position. At this time, the fourth driven wheel has completed one rotation. The rotation speed of the fourth driven wheel is obtained by the motor or gear reduction in front of the fourth driving wheel. The rotation angle of the fourth driven wheel can be adjusted by the length of the slide groove (slide groove notch) of the fourth driven wheel and the width of the slide column (fourth slide column) of the fourth driving wheel. Its rotation angle can be freely adjusted from 30 to 90 degrees. Based on this structure, the rotation (spinning) brushing action of the electric toothbrush is realized.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A rotary electric toothbrush, characterized in that, include: A brush handle, a brush head, and a rotary drive assembly for driving the brush head to rotate are disclosed. The rotary drive assembly is installed in the brush handle, and the brush head is connected to the rotary drive assembly. The rotary drive assembly includes a power mechanism and a rotary drive mechanism for driving the brush head to rotate. Both the power mechanism and the rotary drive mechanism are installed in the brush handle, and the power mechanism is connected to the rotary drive mechanism. The rotary drive mechanism is detachably connected to the brush head. The rotary drive mechanism includes a first driving wheel and a first driven wheel. The first driving wheel is connected to the power mechanism. A first sliding post is provided on the edge of the first driving wheel, and a first sliding groove is provided on the first driven wheel. The first sliding post is slidably installed in the first sliding groove, and the brush head is connected to the first driven wheel. The first driven wheel is a fan-shaped wheel or a rectangular wheel. The length of the first sliding groove is less than the radius of the first driven wheel, and the first driving wheel and the first driven wheel have an overlapping area.

2. A rotary electric toothbrush according to claim 1, characterized in that, The rotary drive assembly includes: a second driving wheel, a second driven wheel, and a first connecting component. The second driving wheel is connected to the power mechanism. A second sliding column is provided on the edge of the second driving wheel, and a third sliding column is provided on the edge of the second driven wheel. One end of the first connecting component is provided with a first through hole adapted to the second sliding column, and the other end of the first connecting component is provided with a second sliding groove adapted to the third sliding column. The second sliding column is rotatably installed in the first through hole, and the third sliding column is slidably installed in the second sliding groove. The brush head is connected to the second driven wheel. The first connecting component is a plate or a rod. Both the second driving wheel and the second driven wheel are round wheels.

3. A rotary electric toothbrush according to claim 1, characterized in that, The rotary drive assembly includes a third driving wheel, a third driven wheel, and a second connecting component. The third driving wheel is connected to the power mechanism. A second through hole is provided on the edge of the third driving wheel. A third sliding groove is provided on the third driven wheel. One end of the second connecting component is rotatably installed in the second through hole, and the other end of the second connecting component is slidably installed in the third sliding groove. The brush head is connected to the third driven wheel. The second connecting component is a U-shaped steel wire or a U-shaped rod. Both the third driving wheel and the third driven wheel are round wheels.

4. A rotary electric toothbrush according to claim 1, characterized in that, The rotary drive assembly includes: a fourth driving wheel, a fourth driven wheel, and an elastic component for resetting the fourth driven wheel. The fourth driving wheel is connected to the power mechanism. A fourth sliding post is provided on the edge of the fourth driving wheel. A sliding groove notch is provided on the edge of the fourth driven wheel. The sliding groove notch is located on the movement trajectory of the fourth sliding post. The two ends of the elastic component are respectively connected to the fourth driven wheel and the brush handle. The fourth driving wheel and the fourth driven wheel have an overlapping area.

5. A rotary electric toothbrush according to claim 4, characterized in that, The elastic component is a tension spring or a compression spring, and the length of the groove notch is less than the radius of the fourth driven wheel; both the fourth driving wheel and the fourth driven wheel are round wheels.

6. A rotary electric toothbrush according to claim 1, characterized in that, The power mechanism includes a motor and a reduction mechanism. The motor is connected to a battery and is connected to the rotary drive mechanism through the reduction mechanism. A stop block for limiting the rotary drive mechanism is provided inside the brush handle. The rotary drive mechanism is detachably connected to the brush head through an output shaft.

7. A rotary electric toothbrush according to claim 6, characterized in that, The reduction mechanism consists of multiple sets of reduction gears. The output shaft is mounted on the brush handle via bearings. One end of the output shaft passes through the brush handle and is exposed on the outside. One end of the output shaft is provided with a slot for detachably installing the brush head.

8. A rotary electric toothbrush according to claim 6, characterized in that, The battery is a rechargeable battery, which is connected to a control chip via a power switch. The control chip is connected to a charging connector, and the motor is connected to the control chip. The charging connector is mounted on the brush handle, and a battery box for mounting the battery is provided in the brush handle. The battery is mounted in the battery box. The brush head has a bristle area, the length of the brush head is 85mm, the total thickness of the brush head and the bristle area is 15mm, the length of the bristle area is 28mm, and the width of the bristle area is 8mm.

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