Electric toothbrush capable of being driven in multiple directions

Abstract

The utility model relates to an electric toothbrush capable of being driven in multiple directions. The electric toothbrush comprises a driving assembly, a reversing assembly, a toothbrush rod and a support. The driving assembly comprises a driving part and a transmission gear, the driving part is used for driving the transmission gear to rotate, and a transmission shaft is arranged on the transmission gear; the support is provided with at least one limiting hole, and the toothbrush rod is rotatably installed in the limiting hole and can linearly move in the axis direction of the limiting hole. The reversing assembly is connected with the transmission shaft and the toothbrush rod, and under the driving of the transmission shaft, the reversing assembly converts the plane rotation movement of the transmission gear into the linear reciprocating movement of the toothbrush rod and the reciprocating rotation within the preset angle range. According to the driving device of the electric toothbrush, the rotating motion of the transmission gear is converted into the linear reciprocating motion of the toothbrush rod and the reciprocating rotation within the preset angle range through the reversing assembly, so that the electric toothbrush can sweep forwards and backwards while sweeping leftwards and rightwards, and the effect of efficiently cleaning teeth is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of electric toothbrushes, and particularly relates to an electric toothbrush with multi-directional driving. Background Art

[0002] At present, the cleaning method of electric toothbrushes on the market is mainly vibration in a single direction. For areas that are difficult to clean, such as the gingival sulcus, it is often difficult to achieve an ideal cleaning effect. Utility Model Content

[0003] In view of the above technical problems, the present application provides an electric toothbrush with multi-directional driving. By means of a commutation component, the rotational motion of a transmission gear is converted into a linear reciprocating motion and a reciprocating rotation within a preset angle range of a toothbrush rod, so that the electric toothbrush can perform forward and backward sweeping while performing left and right sweeping, achieving the effect of efficiently cleaning teeth.

[0004] To solve the above technical problems, the present application provides an electric toothbrush with multi-directional driving, including a driving component, a commutation component, a toothbrush rod and a bracket;

[0005] The driving component includes a driving member and a transmission gear. The driving member is used to drive the transmission gear to rotate, and a transmission shaft is provided on the transmission gear;

[0006] At least one limiting hole is provided on the bracket. The toothbrush rod is rotatably installed in the limiting hole and can perform linear movement in the axial direction of the limiting hole;

[0007] The commutation component connects the transmission shaft and the toothbrush rod. Driven by the transmission shaft, the commutation component converts the planar rotational motion of the transmission gear into a linear reciprocating motion and a reciprocating rotation within a preset angle range of the toothbrush rod.

[0008] Optionally, the commutation component includes a first commutation member and a second commutation member. The first commutation member is connected to the transmission shaft, the second commutation member is connected to the first commutation member, and the second commutation member is connected to the toothbrush rod;

[0009] Driven by the transmission shaft, the first commutation member converts the planar rotational motion of the transmission gear into a rotational motion with an angular deflection of the second commutation member; driven by the first commutation member, the second commutation member converts the rotational motion with an angular deflection into a linear reciprocating motion and a reciprocating rotation within a preset angle range of the toothbrush rod.

[0010] Optionally, the first reversing member includes a first body. One end of the first body is provided with a first connecting shaft, and the other end of the first body is provided with a first connecting hole. The first connecting shaft is connected to the transmission shaft, and the first connecting shaft has mobility on the axis of the transmission shaft. The second reversing member is rotatably fixed to the first connecting hole.

[0011] Optionally, the second reversing member includes a second body. The second body has connecting ears arranged oppositely. Second connecting holes are respectively provided on the oppositely arranged connecting ears, and the second connecting holes are coaxial. A second connecting shaft is provided at the bottom of the second body. The second connecting shaft is connected to the first reversing member. The toothbrush rod is provided with a connecting rod in the vertical direction. The connecting rod is connected to the second reversing member through the second connecting hole.

[0012] Optionally, the transmission shaft is perpendicular to the plane where the transmission gear is located, and the axis of the transmission shaft does not coincide with the axis of the transmission gear.

[0013] Optionally, a third connecting shaft is provided on the transmission shaft, and the third connecting shaft is inclined with respect to the axis direction of the transmission shaft.

[0014] Optionally, the transmission gear is a planar bevel gear. The driving member includes a motor and a tapered bevel gear. The tapered bevel gear is connected to the motor, and the tapered bevel gear meshes with the transmission gear.

[0015] Optionally, the bracket includes a bracket body. One end of the bracket body is provided with a first support portion and a second support portion that are parallel to each other. The transmission gear is installed on the first support portion, and the toothbrush rod is installed on the second support portion.

[0016] Optionally, the second support portion includes a first support plate and a second support plate that are parallel to each other in the length direction of the bracket. A limiting hole is respectively provided on the first support plate and the second support plate, and the limiting hole on the first support plate and the limiting hole on the second support plate are coaxial. Both ends of the toothbrush rod are rotatably installed in the limiting holes and can perform linear movement in the axial direction of the limiting holes.

[0017] Optionally, the electric toothbrush further includes a motor battery pack. The motor battery pack is fixed to the bracket and is connected to the driving member.

[0018] The multi-directionally driven electric toothbrush of the present application includes a driving assembly, a commutation assembly, a toothbrush rod, and a bracket; the driving assembly includes a driving member and a transmission gear, the driving member is used to drive the transmission gear to rotate, and a transmission shaft is provided on the transmission gear; at least one limiting hole is provided on the bracket, the toothbrush rod is rotatably installed in the limiting hole and can perform linear movement in the axial direction of the limiting hole; the commutation assembly connects the transmission shaft and the toothbrush rod, and driven by the transmission shaft, the commutation assembly converts the planar rotational movement of the transmission gear into the linear reciprocating movement and reciprocating rotation within a preset angle range of the toothbrush rod. The driving device of the electric toothbrush of the present application converts the rotational movement of the transmission gear into the linear reciprocating movement and reciprocating rotation within a preset angle range of the toothbrush rod through the commutation assembly, so that the electric toothbrush can perform front-back sweeping while performing left-right sweeping, achieving the effect of efficiently cleaning teeth. Description of the Drawings

[0019] Figure 1 It is a schematic partial structure diagram of the electric toothbrush shown according to an embodiment of the present application.

[0020] Figure 2 It is a schematic front structure diagram of the electric toothbrush shown according to an embodiment of the present application.

[0021] Figure 3 It is a schematic side structure diagram of the electric toothbrush shown according to an embodiment of the present application.

[0022] Figure 4 It is a schematic structure diagram of the commutation assembly shown according to an embodiment of the present application.

[0023] Figure 5 It is a schematic working diagram of the electric toothbrush from the first perspective shown according to an embodiment of the present application.

[0024] Figure 6 It is a schematic working diagram of the electric toothbrush from the second perspective shown according to an embodiment of the present application.

[0025] Description of the Reference Numerals:

[0026] 10. Driving member; 11. Motor; 12. Tapered bevel gear; 13. Transmission gear; 131. Transmission shaft; 132. Third connecting shaft; 20. Commutation assembly; 21. First commutation member; 211. First connecting shaft; 212. First connecting hole; 213. First body; 22. Second commutation member; 221. Second connecting shaft; 222. Second body; 223. Second connecting hole; 224. Connecting ear; 31. Toothbrush rod; 32. Connecting rod; 40. Bracket; 41. Bracket body; 42. First support portion; 43. Second support portion; 44. Limiting hole; 45. First support plate; 46. Second support plate; 50. Motor battery pack. Detailed Description of the Embodiment

[0027] The following specific embodiments illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification.

[0028] In the following description, reference is made to the accompanying drawings, which describe several embodiments of the present application. It should be understood that other embodiments may also be used, and mechanical compositions, structures, electricals, and operations may be changed without departing from the spirit and scope of the present application. The following detailed description should not be considered restrictive. The terms used herein are only for describing specific embodiments and are not intended to limit the present application.

[0029] Although in some instances the terms first, second, etc. are used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another.

[0030] Furthermore, as used herein, the singular forms "a", "an", and "the" are also intended to include the plural forms unless the context indicates otherwise. It should be further understood that the terms "comprising", "including" indicate the presence of the described features, steps, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or meaning any one or any combination. Thus, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C". An exception to this definition only occurs when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0031] First Embodiment

[0032] As Figures 1 to 3 shown, the multi-directionally driven electric toothbrush according to the embodiment of the present application includes a driving assembly, a commutation assembly 20, a toothbrush rod 31, and a bracket 40.

[0033] The driving assembly includes a driving member 10 and a transmission gear 13. The driving member 10 is used to drive the transmission gear 13 to rotate, and a transmission shaft 131 is provided on the transmission gear 13.

[0034] At least one limiting hole 44 is provided on the bracket 40. The toothbrush rod 31 is rotatably installed in the limiting hole 44 and can linearly move in the axial direction of the limiting hole 44.

[0035] The commutation assembly 20 connects the drive shaft 131 and the toothbrush rod 31. Driven by the drive shaft 131, the commutation assembly 20 converts the planar rotational motion of the drive gear 13 into a linear reciprocating motion of the toothbrush rod 31 and a reciprocating rotation within a preset angle range.

[0036] In this embodiment, the driving member 10 provides power to drive the rotation of the drive gear 13. The drive gear 13 is connected to the commutation assembly 20 through the drive shaft 131, and further drives the toothbrush rod 31 to move through the connection between the commutation assembly 20 and the toothbrush rod 31. One end of the toothbrush rod 31 away from the commutation assembly 20 is used to connect a toothbrush head (not shown in the figure) to clean teeth. Specifically, the drive gear 13 makes a planar rotational motion, driving the commutation assembly 20 to rotate synchronously. The commutation assembly 20 can decompose and convert the planar rotational motion of the drive gear 13 into two motion modes of the toothbrush rod. One is the linear reciprocating motion of the toothbrush rod 31 along the length direction (i.e., the A-A axis direction); the other is that the toothbrush rod 31 swings back and forth along the direction perpendicular to the length. On this basis, since the limiting hole 44 on the bracket 40 restricts the displacement of the toothbrush rod 31 perpendicular to the length direction, the toothbrush rod 31 cannot move left and right, thereby limiting the reciprocating rotation of the toothbrush rod 31 within a preset angle range.

[0037] The electric toothbrush according to the embodiment of the present application can more effectively clean the tooth surface and gaps by combining rotational and translational motions, providing a better cleaning effect than traditional electric toothbrushes with a single motion mode. In addition, since the multi-directional automatic cleaning action can cover the tooth surface more comprehensively, there is no need for the user to manually adjust the brushing angle.

[0038] In some embodiments, the commutation assembly 20 includes a first commutation member 21 and a second commutation member 22. The first commutation member 21 is connected to the drive shaft 131, the second commutation member 22 is connected to the first commutation member 21, and the second commutation member 22 is connected to the toothbrush rod 31;

[0039] Driven by the drive shaft 131, the first commutation member 21 converts the planar rotational motion of the drive gear 13 into a rotational motion with an angular deflection of the second commutation member 22; driven by the first commutation member 21, the second commutation member 22 converts the rotational motion with an angular deflection into a linear reciprocating motion of the toothbrush rod 31 and a reciprocating rotation within a preset angle range.

[0040] As an implementation manner of this embodiment, the first commutation member 21 is connected to the transmission shaft 131 and is configured to convert the planar rotational motion of the transmission gear 13 into a rotational motion with an angular deflection. The first commutation member 21 has a structure capable of realizing the angular conversion function. Its input end (not labeled in the figure) rotates under the drive of the transmission gear 13. During the rotation process of the input end, due to its own structure, the deflection angle of the output end is continuously changed, so that the output end of the first commutation member 21 makes a rotational motion with an angular deflection.

[0041] Please refer to Figure 4 simultaneously. Specifically, the first commutation member 21 includes a first body 213. One end of the first body 213 is provided with a first connecting shaft 211, and the other end of the first body 213 is provided with a first connecting hole 212. The first connecting shaft 211 is connected to the transmission shaft 131, and the first connecting shaft 211 has mobility on the axis of the transmission shaft 131. The second commutation member 22 is rotatably fixed to the first connecting hole 212. In this embodiment, the first body 213 is generally an arc-shaped member. Among the two ends of the arc, one end is provided with the first connecting shaft 211 and the other end is provided with the first connecting hole 212. Thus, an included angle can be formed between the axis of the first connecting hole 212 and the first connecting shaft 211 to achieve the purpose of changing the motion angle.

[0042] One end of the first commutation member 21 is connected to the transmission shaft 131 through the first connecting shaft 211, and the other end of the first commutation member 21 is connected to the second commutation member 22 through the first connecting hole 212. When one end of the first commutation member 21 makes a rotational motion under the drive of the transmission gear 13, due to the structural design of the first commutation member 21, the other end of the first commutation member 21 deflects at an angle. Therefore, the first commutation member 21 can output a rotational motion with an angular deflection.

[0043] As an implementation manner of this embodiment, the second commutation member 22 is connected to the first commutation member 21 and the toothbrush rod 31, and is configured to convert the rotational motion with an angular deflection of the first commutation member 21 into a linear reciprocating movement and a reciprocating rotation within a preset angular range of the toothbrush rod 31.

[0044] Specifically, the second commutation member 22 includes a second body 222. The second body 222 is U-shaped and has connecting ears 224 arranged oppositely. Second connecting holes 223 are respectively provided on the oppositely arranged connecting ears 224, and the second connecting holes 223 are coaxial. A second connecting shaft 221 is provided at the bottom of the second body 222, and the second connecting shaft 221 is connected to the first commutation member 21. The toothbrush rod 31 is provided with a connecting rod 32 in the vertical direction, and the connecting rod 32 is connected to the second commutation member 22 through the second connecting hole 223.

[0045] In this embodiment, the second commutation member 22 includes a second body 222 having a U shape and a second connecting shaft 221. The second connecting shaft 221 receives the rotational motion with an angular deflection output by the first commutation shaft 21. During the rotation of the second body 222, the motion paths of the two ends of its U-shaped structure are offset relative to the rotation center (the bottom of the U-shaped structure), and the two ends of the U-shaped structure produce an effect similar to a pendulum motion, and the amplitude of the swing depends on the rotation speed and the geometric parameters of the U-shaped structure. The rotational swing of the second body 222 can generate a motion component along the A-A axis direction and a motion component perpendicular to the A-A axis direction. At the same time, since the second connecting shaft 221 performs a rotational motion with an angular deflection, the relative height of the two ends of the second body 222 continuously changes during the motion, thereby causing the connecting rod 32 connected thereto to swing in a direction perpendicular to the A-A axis, driving the toothbrush rod 31 to reciprocally rotate within a preset angle range. Since the toothbrush rod 31 is limited by the limiting hole 44 of the bracket 40 and cannot move in a direction perpendicular to the A-A axis. Therefore, the second commutation member 22 can convert the rotational motion with an angular deflection into a linear reciprocating motion of the toothbrush rod 31 and a reciprocating rotation within a preset angle range.

[0046] The first connecting shaft 211 has mobility on the axis of the transmission shaft 131 and is used to provide motion compensation when the second commutation member 22 yaws to compensate for the displacement of the connecting ear 224 of the second commutation member 22 during yaw.

[0047] In this way, for the electric toothbrush according to the embodiment of the present application, the driving assembly sequentially transmits the force to the first commutation member 21, then to the second commutation member 22, and finally to the toothbrush rod 31, realizing the conversion from a single planar rotational motion to a compound motion. Through the connection between the transmission shaft 131 and the commutation assembly 20, the electric toothbrush can perform forward and backward sweeping while performing left and right direction sweeping and vibration, with a simple structure and low cost.

[0048] In some embodiments, the transmission shaft 131 is perpendicular to the plane where the transmission gear 13 is located, and the axis of the transmission shaft 131 does not coincide with the axis of the transmission gear 13. In this embodiment, the transmission shaft 131 is in an eccentric state relative to the transmission gear 13, which can increase the movement or swing amplitude of the second commutation member 22.

[0049] In some embodiments, a third connecting shaft 132 is provided on the transmission shaft 131, and the third connecting shaft 132 is inclined relative to the axis direction of the transmission shaft 131.

[0050] Understandably, the transmission shaft 131 is eccentric with respect to the transmission gear 13. When the transmission gear 13 rotates, the movement locus of the transmission shaft 131 is circular. The movement or swing amplitude of the subsequent movement conversion is adjusted in each rotation cycle. The third connecting shaft 132 is inclined with respect to the axial direction of the transmission shaft 131, and can convert the planar rotational movement into a rotational movement with a certain angular deflection, optimizing the movement conversion effect of the subsequent first reversing member 21 and making the movement of the first reversing member 21 smoother. The degree of angular deflection depends on the included angle between the third connecting shaft 132 and the axis of the transmission shaft 131. Thus, through the eccentrically designed transmission shaft 131 and the third connecting shaft 132 with a certain inclination angle, the impact and vibration during the movement conversion can be reduced, making the electric toothbrush run more smoothly, reducing noise, and enhancing the user experience.

[0051] In some embodiments, the transmission gear 13 is a planar helical gear, and the driving member 10 includes a motor 11 and a tapered helical gear 12. The tapered helical gear 12 is connected to the motor 11, and the tapered helical gear 12 and the transmission gear 13 mesh with each other.

[0052] As an implementation manner of this embodiment, during the meshing process of the tapered helical gear 12 and the transmission gear 13, compared with conventional spur gears, the contact line between the gears gradually enters and exits the meshing area instead of suddenly contacting and separating. Therefore, the impact and noise generated during gear meshing can be significantly reduced, making the electric toothbrush run more smoothly. In addition, since the contact line of the helical gear is longer and the distributed load is more uniform, it can withstand greater radial and axial loads. Therefore, the load-bearing capacity and durability of the transmission gear 13 are improved.

[0053] In some embodiments, the bracket 40 includes a bracket body 41. One end of the bracket body 41 is provided with a first support portion 42 and a second support portion 43 that are parallel to each other. The transmission gear 13 is installed on the first support portion 42, and the toothbrush rod 31 is installed on the second support portion 43.

[0054] As an implementation manner of this embodiment, the bracket 40 includes a bracket body 41, a first support portion 42, and a second support portion 43. The bracket body 41 is provided with an area (not shown in the figure) for accommodating the motor 11 in the middle. The first support portion 42 and the second support portion 43 are located at one end of the bracket 40 and are distributed in parallel along the thickness direction of the bracket 40. Among them, the first support portion 42 matches the shape of the transmission gear 13 and is used to install the transmission gear 13. The second support portion 43 is a frame structure in the shape of a square, and is used to install the toothbrush rod 31. By fixing the transmission gear 13 and the toothbrush rod 31 of the electric toothbrush on different support portions respectively, the decentralized support can increase the rigidity and stability of the entire electric toothbrush.

[0055] In some embodiments, the second support portion 43 includes a first support plate 45 and a second support plate 46 arranged in parallel in the length direction of the bracket 40, and a limiting hole 44 is respectively provided on the first support plate 45 and the second support plate 46, and the limiting hole 44 of the first support plate 45 is coaxial with the limiting hole 44 on the second support plate 46, and the two ends of the toothbrush rod 31 are rotatably installed in the limiting hole 44, and can move linearly in the axial direction of the limiting hole 44. The first support plate 45 and the second support plate 46 are arranged in parallel in the length direction of the bracket 40 to form a stable support frame to ensure that the toothbrush rod 31 maintains straightness and stability during movement. The limiting hole 44 of the first support plate 45 is coaxial with the limiting hole 44 on the second support plate 46, which ensures the precise alignment of the toothbrush rod 31 in the entire moving range and avoids deviation or shaking during movement. The limiting hole 44 not only defines the rotation center of the toothbrush rod 31, but also allows linear movement along the axial direction, which helps to achieve vibration or reciprocating motion of the toothbrush head and increase cleaning efficiency.

[0056] In some embodiments, the electric toothbrush further includes a motor battery pack 50 , which is fixed to the bracket 40 and connected to the driving member 10 .

[0057] As an implementation of this embodiment, the motor battery pack 50 is used to provide power to the motor and is installed at the other end of the bracket 40, away from the driving member 10 and the toothbrush rod 31. In this way, the overall weight distribution of the electric toothbrush is balanced, improving the user's comfort and the physical stability of the product.

[0058] During the use of the electric toothbrush, the rotation of the transmission gear drives the reversing assembly to perform an angularly deflected rotation. The angularly deflected rotation of the reversing assembly is converted into a linear reciprocating movement of the toothbrush rod and a reciprocating rotation within a preset angle range. Please refer to Figure 5 , in the initial state (a), the rotation angle of the transmission gear relative to the toothbrush rod is 0 degrees. At this time, the toothbrush rod moves linearly along the length direction and close to the motor. In state (b), the transmission gear rotates 90 degrees counterclockwise relative to the toothbrush rod. At this time, the toothbrush rod rotates perpendicular to the length direction and toward the right. In state (c), the transmission gear rotates 180 degrees counterclockwise relative to the toothbrush rod. At this time, the toothbrush rod moves linearly along the length direction and away from the motor. In state (d), the transmission gear rotates 270 degrees counterclockwise relative to the toothbrush rod. At this time, the toothbrush rod rotates perpendicular to the length direction and toward the left.

[0059] Similarly, if Figure 6As shown, in the initial state (e), the rotation angle of the transmission gear relative to the toothbrush rod is 0 degrees. At this time, the toothbrush rod moves linearly along the length direction and on the side close to the motor. In state (f), the transmission gear rotates 90 degrees clockwise relative to the toothbrush rod. At this time, the toothbrush rod rotates in the direction perpendicular to the length direction and towards the front side of the paper surface. In state (g), the transmission gear rotates 180 degrees clockwise relative to the toothbrush rod. At this time, the toothbrush rod moves linearly along the length direction and on the side away from the motor. In the initial state (h), the transmission gear rotates 270 degrees clockwise relative to the toothbrush rod wheel. At this time, the toothbrush rod rotates in the direction perpendicular to the length direction and towards the inner side of the paper surface.

[0060] The multi-directionally driven electric toothbrush according to the embodiment of the present application includes a driving component, a commutation component, a toothbrush rod and a bracket; the driving component includes a driving member and a transmission gear, the driving member is used to drive the transmission gear to rotate, and a transmission shaft is provided on the transmission gear; at least one limiting hole is provided on the bracket, the toothbrush rod is rotatably installed in the limiting hole and can move linearly in the axial direction of the limiting hole; the commutation component connects the transmission shaft and the toothbrush rod, and driven by the transmission shaft, the commutation component converts the planar rotational motion of the transmission gear into the linear reciprocating motion and the reciprocating rotation within a preset angle range of the toothbrush rod. The driving device of the electric toothbrush of the present application converts the rotational motion of the transmission gear into the linear reciprocating motion and the reciprocating rotation within a preset angle range of the toothbrush rod through the commutation component, so that the electric toothbrush can perform front-back sweeping while performing left-right sweeping, achieving the effect of efficiently cleaning teeth.

[0061] All the above embodiments are only specific implementation manners of the present application, used to illustrate the technical solutions of the present application, rather than to limit it. The protection scope of the present application is not limited thereto. Any person skilled in the art who makes equivalent deformations or substitutions to the technical solutions recorded in the foregoing embodiments is included within the scope defined by the claims of the present application.

Claims

1. A multi-directionally driven electric toothbrush, characterized in that: It includes a driving component, a reversing component, a toothbrush rod and a bracket; The driving assembly includes a driving member and a transmission gear, wherein the driving member is used to drive the transmission gear to rotate, and the transmission gear is provided with a transmission shaft; The bracket is provided with at least one limiting hole, and the toothbrush rod is rotatably mounted in the limiting hole and can move linearly in the axial direction of the limiting hole; The reversing assembly connects the transmission shaft and the toothbrush rod. Driven by the transmission shaft, the reversing assembly converts the planar rotational motion of the transmission gear into a linear reciprocating motion and a reciprocating rotation within a preset angle range of the toothbrush rod.

2. The electric toothbrush according to claim 1, characterized in that: The reversing assembly comprises a first reversing member and a second reversing member, wherein the first reversing member is connected to the transmission shaft, the second reversing member is connected to the first reversing member, and the second reversing member is connected to the toothbrush rod; Driven by the transmission shaft, the first switching member converts the planar rotational motion of the transmission gear into the rotational motion with an angle deflection of the second switching member; driven by the first switching member, the second switching member converts the rotational motion with an angle deflection into the linear reciprocating movement of the toothbrush rod and the reciprocating rotation within a preset angle range.

3. The electric toothbrush according to claim 2, characterized in that: The first switching member includes a first body, a first connecting shaft is provided at one end of the first body, a first connecting hole is provided at the other end of the first body, the first connecting shaft is connected to the transmission shaft, the first connecting shaft has mobility on the axis of the transmission shaft, and the second switching member is rotatably fixed to the first connecting hole.

4. The electric toothbrush according to claim 2 or 3, characterized in that: The second switching member includes a second body, the second body has connecting ears arranged opposite to each other, the connecting ears arranged opposite to each other are respectively provided with second connecting holes, and the second connecting holes are coaxial, a second connecting shaft is provided at the bottom of the second body, the second connecting shaft is connected to the first switching member, and the toothbrush rod is provided with a connecting rod in the vertical direction, and the connecting rod is connected to the second switching member through the second connecting hole.

5. The electric toothbrush according to claim 1, characterized in that: The transmission shaft is perpendicular to the plane where the transmission gear is located, and the axis of the transmission shaft does not coincide with the axis of the transmission gear.

6. The electric toothbrush according to claim 1 or 5, characterized in that: The transmission shaft is provided with a third connecting shaft, and the third connecting shaft is inclined relative to the axial direction of the transmission shaft.

7. The electric toothbrush according to claim 1, characterized in that: The transmission gear is a plane bevel gear, and the driving member includes a motor and a bevel bevel gear. The bevel bevel gear is connected to the motor, and the bevel bevel gear and the transmission gear are meshed with each other.

8. The electric toothbrush according to claim 1, characterized in that: The bracket comprises a bracket body, one end of which is provided with a first supporting portion and a second supporting portion which are parallel to each other, the transmission gear is mounted on the first supporting portion, and the toothbrush rod is mounted on the second supporting portion.

9. The electric toothbrush according to claim 8, characterized in that: The second supporting portion includes a first supporting plate and a second supporting plate which are arranged in parallel in the length direction of the bracket, and a limiting hole is respectively provided on the first supporting plate and the second supporting plate, and the limiting hole of the first supporting plate is coaxial with the limiting hole on the second supporting plate, and the two ends of the toothbrush rod are respectively rotatably installed in the limiting holes and can move linearly in the axial direction of the limiting holes.

10. The electric toothbrush according to claim 1, characterized in that: The electric toothbrush also includes a motor battery pack, which is fixed to the bracket and connected to the driving member.

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