Electric toothbrush

Abstract

To provide an electric toothbrush which improves the sealing property of a tenon part and extends the service life. [Solution] The electric toothbrush includes a support frame (1) having a hollow portion (11) and a drive frame (2) elastically connected to the support frame by an elastic portion (24) and a connecting portion (25), the drive frame (2) including a frame body and a tenon (21) extending from the frame body to the upper side of the electric toothbrush. The connecting portion surrounds and connects the tenon, the connecting portion and the frame body are spaced apart in the up-down direction of the electric toothbrush, the frame body is disposed in the hollow portion, the frame body and the support frame are spaced apart in the left-right direction of the electric toothbrush so that the frame body can move relative to the support frame, the tenon is used to connect the brush head, and a sealing member is fitted onto the tenon and attached to the support frame adjacent to the connection point with the elastic portion, making the oscillation width of the tenon at the sealing member smaller than the oscillation width of the tenon end.

Description

[Technical Field]

[0001] The present invention relates to the technical field of oral hygiene, and in particular to electric toothbrushes. [Background technology]

[0002] Electric toothbrushes use high-speed rotation or vibration of the motor core to generate high-frequency vibrations in the brush head, which instantly breaks down toothpaste into fine bubbles and cleans deep between the teeth. At the same time, the vibrating bristles stimulate blood circulation in the mouth and have a massaging effect on the gum tissue.

[0003] In conventional technology, a motor rotates an eccentric block to generate vibrations, but the vibrations often create gaps in the tenon that connects the brush head, allowing liquid to seep into the brush handle, resulting in an insufficient seal and affecting the lifespan of the electric toothbrush. Summary of the Invention

[0004] In order to overcome or mitigate the above problems in the prior art, the present invention aims to propose an electric toothbrush that improves the sealing performance of the tenon area, thereby extending the service life of the electric toothbrush.

[0005] This invention is an electric toothbrush, a support frame having a hollow portion; the support frame is a drive frame elastically connected by an elastic portion and a connecting portion, and includes a frame body and a tenon extending from the frame body to an upper side of the electric toothbrush, the connecting portion surrounds and connects the tenon, and the connecting portion and the frame body are spaced apart in the vertical direction of the electric toothbrush, a drive frame, wherein the frame body is disposed in the hollow portion, the frame body and the support frame are spaced apart at least in the left-right direction of the electric toothbrush so that the frame body can move relative to the support frame, the tenon is used to connect a brush head, a seal member is fitted onto the tenon, and the seal member is attached to the support frame close to a connection point with the elastic portion, thereby making the swing width of the seal member of the tenon smaller than the swing width of the end of the tenon, the connection portion and the front end of the support frame are on the same plane, and the seal member can come into contact with the connection portion; We propose an electric toothbrush that includes a motor provided in the frame body, which, when operated, drives the drive frame to swing or vibrate relative to the support frame around a fulcrum in the tenon, thereby allowing the tenon to drive the brush head to swing or vibrate.

[0006] In at least one possible embodiment, the distance between the sealing member and the fulcrum in the vertical direction is less than 1 / 3 of the length of the tenon, A waterproof ring is provided above the sealing member, and the waterproof ring is mutually engaged and connected with the sealing member.

[0007] In at least one possible embodiment, when observed along the front-to-back direction of the electric toothbrush, the elastic portion is inclined relative to the left-to-right and up-to-down directions of the electric toothbrush, and the more the elastic portion extends to both the left and right sides, the closer it gets to the rear of the electric toothbrush.

[0008] In at least one possible embodiment, the drive frame, the elastic portion, the connection portion, and the support frame are integrally formed.

[0009] In at least one possible embodiment, the connecting portion is disposed at an upper end of the elastic portion in the vertical direction of the electric toothbrush, The tenon and the connecting portion are integrally connected by an injection molding process.

[0010] In at least one possible embodiment, the elastic portion has a rectangular cross section, and the connecting portion and the elastic portion have the same size in the front-to-rear direction of the electric toothbrush.

[0011] In at least one possible embodiment, the upper end of the frame body is formed into a first inverted U-shaped portion whose openings extend to both the left and right sides of the electric toothbrush, the tenon extends upward from the top end of the first inverted U-shaped portion, the connecting portion and the elastic portion jointly form a second inverted U-shaped portion whose openings extend to both the left and right sides of the electric toothbrush, and the second inverted U-shaped portion is fitted onto the outside of the first inverted U-shaped portion at a distance so as to have a shape similar to that of the first inverted U-shaped portion.

[0012] In at least one possible embodiment, a weight is connected to the frame body.

[0013] In at least one possible embodiment, an eccentric block is connected to the output shaft of the motor, and the motor drives and rotates the eccentric block, thereby causing the drive frame to oscillate or vibrate, and in the vertical direction of the electric toothbrush, the eccentric block is arranged below the motor, and the weight is arranged below the eccentric block.

[0014] In at least one possible embodiment, the frame is provided with a battery chamber for mounting a battery.

[0015] By adopting the above technical solution, the distance between the sealing member and the fulcrum is made relatively short, so that the swing range of the tenon at the location of the sealing member is relatively small and the resistance force it receives is reduced, thereby improving the waterproof effect of the sealing member. [Brief explanation of the drawings]

[0016] [Figure 1]1 is an exploded perspective view of a partial structure of an electric toothbrush according to an embodiment of the present invention; [Figure 2] 1 is a structural diagram of a support frame and a drive frame of an electric toothbrush according to an embodiment of the present invention; [Figure 3] 2 is a front view of the support frame and drive frame structure of the electric toothbrush according to the embodiment of the present invention; [Figure 4] 3 is a rear view of the support frame and drive frame structure of the electric toothbrush according to an embodiment of the present invention; [Figure 5] 2 is a side view of the structure of the support frame and drive frame of the electric toothbrush according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0017] In order to more clearly explain the above-mentioned objects, features and advantages of the present invention, this section will describe in detail specific embodiments of the present invention in conjunction with the accompanying drawings. In addition to the embodiments described in this section, the present invention can also be implemented in other different forms, and those skilled in the art can make corresponding improvements, modifications and substitutions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed in this section. The scope of protection of the present invention shall be defined by the claims.

[0018] In the following description, the up-down direction A of the electric toothbrush indicates the direction in which the axis of the electric toothbrush extends, with the upper side indicating the side on which the brush head is located and the lower side indicating the side on which the brush handle is located. The front-to-rear direction F of the electric toothbrush indicates the direction in which the bristles of the brush head of the electric toothbrush extend, with the front side indicating the side on which the bristles face and the rear side indicating the side on which the bristles face away from each other. The left-to-right direction R of the electric toothbrush is perpendicular to both the up-to-down direction A and the front-to-rear direction F of the electric toothbrush.

[0019] As shown in FIGS. 1 to 5, an embodiment of the present invention provides an electric toothbrush including a brush handle and a brush head (not shown), where the brush head is detachably connected to the upper end of the brush handle.

[0020] The brush handle includes a housing (not shown), a support frame 1, a drive frame 2, a weight 3, a motor 4, a vibration damping member 5, a battery 6, a circuit board 7, a sealing member 8 (e.g., an annular sealing ring), and a waterproof ring 9. The upper end of the housing has an opening, and the support frame 1, the drive frame 2, the weight 3, the motor 4, the vibration damping member 5, the battery 6, the circuit board 7, the sealing member 8, and the waterproof ring 9 can be disposed inside the housing. The waterproof ring 9 can be attached to the front end of the brush handle housing, and the waterproof ring 9 can cover the opening of the brush handle housing, and a tenon 21, described below, can protrude from the waterproof ring 9. The waterproof ring 9 is positioned above the sealing member 8, and is engaged and connected to the sealing member 8 (not limited to tight fit engagement / intermediate fit engagement / loose fit engagement). For example, an annular protrusion can be provided on the upper end of the sealing member 8, and a recessed groove that engages with the annular protrusion can be provided on the lower end of the waterproof ring 9, and the engagement between the annular protrusion and the recessed groove can improve the sealing performance of the connection between the two.

[0021] The battery 6 and the circuit board 7 can be fixedly connected to the support frame 1 , for example, a battery chamber 13 can be provided in the frame 1 and the battery 6 can be attached to the battery chamber 13 .

[0022] The weight 3, the motor 4 and the vibration damping member 5 can be attached to the drive frame 2, and the drive frame 2 and the support frame 1 can be elastically connected by an elastic portion 24.

[0023] The support frame 1 can have a hollow portion 11, which can be positioned at the top of the brush handle in the vertical direction A, and can also be positioned at an intermediate position in the horizontal direction R of the electric toothbrush.

[0024] The drive frame 2 can include a frame body and a tenon 21 extending from the frame body upward in the vertical direction A of the electric toothbrush, the tenon 21 being used to connect a brush head, and the brush head being detachably and replaceably connected to the tenon 21. The tenon 21 can be columnar, and can be made of a metal material so as to have relatively good rigidity.

[0025] The frame body can include a motor chamber 22, and the motor 4 can be housed in the motor chamber 22. In the vertical direction A of the electric toothbrush, the pivot 21 can be arranged above the motor chamber 22. An eccentric block 41 can be attached to the output shaft of the motor 4 so that vibrations can be generated when the motor 4 rotates. In the vertical direction A of the electric toothbrush, the eccentric block 41 can be arranged below the motor 4.

[0026] The drive frame 2 and the support frame 1 can be elastically connected by the elastic portion 24. For example, the frame body can be elastically connected to the support frame 1 by the tenon 21, the connecting portion 25, and the elastic portion 24. The frame body can be disposed in the hollow portion 11, and the frame body and the support frame 1 are spaced apart over most of the area. For example, the frame body is spaced apart from the support frame 1 at least in the left-right direction R of the electric toothbrush, allowing the frame body to move relative to the support frame 1. Vibrations generated by operation of the motor 4 can drive the frame body to oscillate or vibrate relative to the support frame 1, and the oscillation or vibration is further transmitted to the tenon 21. By elastically connecting the drive frame 2 and the support frame 1 and spacing them apart as a whole, the brush head connected to the tenon 21 can have a certain degree of freedom of movement, allowing the brush head to receive forces in different directions, resulting in more effective tooth cleaning and gum massage.

[0027] As shown in FIG. 4 , the upper end of the frame body may be formed into a first inverted U-shaped portion with openings extending to both the left and right sides of the electric toothbrush, and the tenon 21 may extend upward from the top end of the first inverted U-shaped portion. The connecting portion 25 and the elastic portion 24 may jointly form a second inverted U-shaped portion with openings extending to both the left and right sides of the electric toothbrush. The frame body, the elastic portion 24, the connecting portion 25, the support frame 1, and the tenon 21 may be integrally connected by an injection molding process, and the second inverted U-shaped portion may be externally fitted to the outside of the first inverted U-shaped portion with a gap therebetween so as to have a shape similar to that of the first inverted U-shaped portion, thereby facilitating demolding after injection molding. The frame body may include a weight chamber 23, and the weight 3 may be accommodated in the weight chamber 23. Optionally, in the vertical direction A of the electric toothbrush, the weight chamber 23 may be located below the motor chamber 22, and the weight 3 may be located below the eccentric block 41. In the vertical direction A of the electric toothbrush, the pivot 21 can be arranged above the motor chamber 22, and the weight chamber 23 can be arranged below the motor chamber 22. The weight 3 increases the overall weight of the drive frame 2, balances the vibrations that occur when the motor is operating, avoids imbalance caused by the vibrations, stabilizes the electric toothbrush during use, and allows the brush head to move more smoothly and efficiently.

[0028] Tenon 21 can be connected to elastic portion 24 via connecting portion 25, which can be strip-shaped and can surround tenon 21. In the vertical direction A of the electric toothbrush, connecting portion 25 can be spaced apart to a certain extent from the frame body. Connecting portion 25 is connected to support frame 1 via two elastic portions 24, which can be located on both the left and right sides of connecting portion 25 in the horizontal direction R.

[0029] As shown in Figures 3 and 4, when viewed along the front-to-back direction F of the electric toothbrush, the elastic portion 24 is inclined relative to the left-to-right direction R of the electric toothbrush, so that the elastic portion 24 approaches the rear of the electric toothbrush as it extends to both sides. For example, the elastic portion 24 can be inclined at an angle of 30 to 60 degrees relative to the up-down direction A, and optionally, the elastic portion 24 can be inclined at an angle of 45 degrees relative to the up-down direction A. If the inclination angle of the elastic portion relative to the up-down direction A is less than 30 degrees, it becomes difficult to obtain the vibration component of the tenon 21 that disintegrates along the up-down direction A, resulting in increased energy loss. If the inclination angle of the elastic portion relative to the up-down direction A is greater than 60 degrees, the effective deformation stroke of the elastic portion becomes relatively small, and vibration transmission efficiency decreases.

[0030] As can be seen, the elastic portion 24, which is inclined relative to the up-down direction A, allows the pivot 21 to absorb vibrations and provide elastic compensation in any of three directions, including the up-down direction A, the front-back direction F, and the left-right direction R. When the motor 4 rotates and drives the eccentric block 41, the inclined elastic portion 24 can cooperate with the rotation surface of the motor eccentric block to generate a vector superposition effect, thereby increasing the amplitude of the brush head and allowing the brush head to generate a compound vibration of an elliptical locus, which improves the cleaning effect on the gum line compared to a toothbrush with linear vibration.

[0031] In the vertical direction A, the connection portion 25 can be disposed at the upper end of the elastic portion 24 .

[0032] The elastic portion 24 may be in the form of a strip. When observed along the front-rear direction F of the electric toothbrush, the thickness of the connecting portion 25 may be greater than the thickness of the elastic portion 24.

[0033] As can be understood, the thickness of the connecting portion 25 can be adaptively changed according to design requirements. The elastic portion 24 enables the motor 4 to drive the frame body to swing or vibrate relative to the support frame 1. The elastic portion 24 absorbs and damps external forces, such as vibrations and shocks during use, reducing damage to the overall structure and improving the service life and grip comfort.

[0034] As can be seen, the motor 4 allows the frame body to move in multiple directions, which not only reaches different surfaces of the teeth but also more effectively removes dirt and plaque from between the teeth.

[0035] The elastic portion 24 can be provided on both the left and right sides of the connecting portion 25 in the left-right direction R. The elastic portion 24 can be formed in a bendable piece, and the dimension (width) of the piece-shaped elastic portion in the front-rear direction F can be larger than the dimension (thickness, or the thickness in the direction perpendicular to the direction in which the elastic portion 24 extends at an angle) in the left-right direction R. Here, the thickness of the piece-shaped elastic portion refers to the actual thickness of a single elastic portion 24 out of the two elastic portions 24, and does not include the space between the two elastic portions 24.

[0036] This allows the elastic part to bend and deform easily in the left-right direction R of the electric toothbrush, but is less likely to bend and deform (but is still capable of deforming) in the front-back direction F of the electric toothbrush. In this way, the drive frame 2 can easily swing in the left-right direction R relative to the support frame 1, driving the brush head to swing or vibrate in the left-right direction R, thereby cleaning the teeth and / or gums.

[0037] The elastic portion 24 may have a rectangular cross section, and the connecting portion 25 and the elastic portion 24 may have the same dimensions in the front-rear direction F.

[0038] The pivot 21 may have a fulcrum P. As can be understood, the fulcrum P is an artificially defined virtual position and is not a structurally existing support point. When the motor 4 drives the drive frame 2 to oscillate or vibrate, the drive frame 2 can oscillate or vibrate around the fulcrum P. As can be understood, movement of the fulcrum P within a certain range is also acceptable. For example, the amplitude near the fulcrum P may be limited to 0.1 mm to 0.5 mm. This reduces resistance to vibration in the fulcrum P area, allowing the vibration energy of the motor 4 to be more concentratedly transmitted to the elastic arm 24 and improving vibration transmission efficiency. Because vibration energy is concentrated near the fulcrum P, the vibration absorption function of the elastic arm 24 can reduce impact on the seal ring 8 due to excess vibration. At positions of the brush head away from the fulcrum P, the pivot 21 releases the vibration energy, amplifying the oscillation amplitude and improving cleaning effectiveness.

[0039] Alternatively, in this embodiment, the elastic part 24, the connecting part 25, the frame body, and the support frame 1 can all be made of plastic material, and the elastic part 24, the connecting part 25, the drive body, and the support frame 1 can be integrally molded. The tenon 21 is made of metal, and the tenon 21 and the connecting part 25 can be integrally connected by an injection molding process. This reduces assembly and mounting errors and wear due to contact engagement, and the overall structural strength and stability of the support frame 1 and the drive frame 2 are relatively high.

[0040] For example, two seal member mounting holes 12 can be provided at the front end of the support frame 1, and the two seal member mounting holes 12 can be provided on both the left and right sides of the tenon 21 in the left-right direction R of the electric toothbrush. The seal member 8 can be fitted onto the outside of the tenon 21, and the fixing claws of the seal member 8 can be attached to the seal member mounting holes 12. The seal member 8 can prevent water and bubbles from entering the inside of the main body 100, and can also reduce the impact of vibration on the waterproof ring 9, improving the sealing effect.

[0041] The connection portion 25 and the front end of the support frame 1 can be aligned on the same plane, and the sealing member 8 can come into contact with the connection portion 25. As a result, the distance between the sealing member 8 and the fulcrum P becomes relatively short, and the distance between the sealing member 8 and the fulcrum P can be set to 2 to 5 mm. At the location of the sealing member 8, the swing range of the tenon 21 becomes relatively small, and the resistance force it receives becomes small, resulting in excellent waterproofing effect of the sealing member 8.

[0042] Optionally, the distance between the sealing member 8 and the fulcrum P in the vertical direction A is less than one-third of the length of the pivot 21 .

[0043] Optionally, a vibration-damping member 5 can be connected to the drive frame 2, at least a portion of which is disposed in the gap between the drive frame 2 and the support frame 1. The vibration-damping member 5 has elasticity, for example, it can be made of foam plastic or rubber. When the drive frame 2 oscillates or vibrates, the vibration-damping member 5 effectively absorbs and dampens the vibrations transmitted to the support frame 1, reducing the intensity of the vibrations transmitted to the user's hands and improving comfort during use. The vibration-damping member 5 buffers vibrations to protect the motor 4 and other components and reduce noise generated when the motor 4 is operating, resulting in a quieter electric toothbrush and an improved user experience. Furthermore, the vibration-damping member 5 buffers external impacts, reducing damage caused by falls and extending the service life of the electric toothbrush.

[0044] When using the electric toothbrush of the present invention, the electric toothbrush is turned on to power up and rotate the motor 4. The motor 4 drives the eccentric block 41 to rotate, causing the frame body to oscillate or vibrate around the fulcrum P, transmitting power to the pivot 21. The frame body and the brush head are located at opposite ends of the fulcrum P, and the lever principle is used to amplify the oscillation or vibration of the frame body at the position of the brush head's bristles. The oscillation width of the brush head attached to the pivot 21 can reach 3 to 5 mm, resulting in a relatively good cleaning effect.

[0045] The electric toothbrush of the present invention has the following beneficial effects: (1) The motor 4 drives the drive frame 2 to oscillate or vibrate relative to the support frame 1, which in turn drives the pivot 21 to oscillate or vibrate the brush head synchronously. This design effectively reduces the transmission of vibration to the brush handle, thereby reducing energy consumption and improving brushing effectiveness. Furthermore, the structure is simple, yet the rotational motion of the motor 4 can be easily converted into the oscillation or vibration of the pivot 21, thereby reducing manufacturing costs. (2) By transmitting the vibration to the tenon 21 by the elastic arm 24, an amplitude difference can be generated in the vibration transmission path, and since the amplitude is small near the fulcrum, the sealing member 8 is not excessively pressed and deformed by the tenon 21, resulting in a better sealing effect, and since the amplitude is large at the upper end of the tenon 21, the cleaning efficiency of the brush head is improved. (3) Since the tenon 21, the elastic portion 24, the connection portion 25, and the support frame 1 are integrally molded, the overall structural strength of the support frame 1 and the drive frame 2 is relatively high and the stability is relatively good, and loosening of the connection due to long-term vibration and a decrease in vibration transmission efficiency can be avoided. (4) The elastic arm 24 can absorb and buffer the vibrations of the drive frame 2, so that the vibrations are transmitted to the brush handle and ultimately to the user's hand with relatively little force, reducing the strength of the vibrations transmitted to the user's hand, improving comfort in use and reducing noise, improving quietness during use of the electric toothbrush and improving the user experience. (5) The structure of the elastic arm 24 is simple, and the one-piece design makes it easy to manufacture and assemble, and the manufacturing cost is relatively low.

[0046] It should be understood that at least some of the aspects or features in the above-described embodiments, examples or illustrations can be suitably combined.

[0047] As can be understood, in the present invention, when the number of a member or part is not particularly limited, the number may be one or more, and here, "more than one" means two or more. When the number of members or parts is shown in the accompanying drawings and / or described in the specification as a specific number, such as two, three, or four, the specific number is generally not limiting but is exemplary, and can be understood as a plurality, i.e., two or more, but this does not mean that the present invention excludes the case where there is one.

[0048] In the present invention, unless otherwise clearly stated or limited, terms such as "attachment," "assembly," "assembly," "connection," "connection," "coupling," "connection," "abutment," "communication," "interconnection," "conductivity," "fixing," and "fastening" should be understood broadly, and may refer to, for example, direct or indirect connection. For example, with regard to connection, it may be a fixed connection, a detachable connection, or an integral formation. It may be a mechanical connection or an electrical connection, a direct connection, or an indirect connection via an intermediate medium. Furthermore, unless otherwise clearly stated or limited, it may refer to communication within two elements or an interactive relationship between two elements. For example, with regard to communication / conduction, it may be direct communication / conduction, or indirect communication / conduction via an intermediate medium. Those skilled in the art will be able to understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0049] In this invention, unless otherwise clearly explained or limited, when one part is installed / attached / located / housed / placed inside, within, or the like of another part, it may mean either of the following two aspects: a aspect in which a part or most of the part is located within the other part, and a aspect in which the part is completely housed within the other part.

[0050] Although the present invention has been described in detail using the above embodiments, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be modified and implemented as modified embodiments without departing from the spirit and scope of the present invention as defined by the claims. Therefore, the description in this specification is for illustrative purposes only and does not have any limiting meaning on the present invention. [Explanation of symbols]

[0051] 1 Support Frame 11 Hollow part 12 Seal member mounting hole 13 Battery Compartment 2 Drive frame 21 Tenon 22 Motor Room 23 Weight Room 24 Elastic part 25 Connection 3 weight 4 motors 41 Eccentric block 5. Vibration-damping members 6 batteries 7 Circuit Board 8 Sealing material 9 Waterproof ring P fulcrum A Vertical direction F Front and back direction R Left / right direction

Claims

1. In electric toothbrushes, a support frame having a hollow portion; the support frame is a drive frame elastically connected by an elastic portion and a connecting portion, and includes a frame body and a tenon extending from the frame body to an upper side of the electric toothbrush, the connecting portion surrounds and connects the tenon, and the connecting portion and the frame body are spaced apart in the vertical direction of the electric toothbrush, a drive frame, wherein the frame body is disposed in the hollow portion, the frame body and the support frame are spaced apart at least in the left-right direction of the electric toothbrush so that the frame body can move relative to the support frame, the tenon is used to connect a brush head, a seal member is fitted onto the tenon, and the seal member is attached to the support frame close to a connection point with the elastic portion, thereby making the swing width of the tenon at the seal member location smaller than the swing width of the end of the tenon, the connection portion and the front end of the support frame are on the same plane, and the seal member can come into contact with the connection portion; an electric toothbrush comprising: a motor provided in the frame body, the operation of which drives the drive frame to swing or vibrate relative to the support frame around a fulcrum in the tenon, thereby causing the tenon to drive the brush head to swing or vibrate.

2. The distance between the sealing member and the fulcrum in the vertical direction is less than one-third of the length of the tenon, 2. The electric toothbrush according to claim 1, wherein a waterproof ring is provided above the sealing member, and the waterproof ring is mutually engaged and connected with the sealing member.

3. 2. The electric toothbrush according to claim 1, wherein, when observed along the front-to-back direction of the electric toothbrush, the elastic portion is inclined relative to the left-to-right and up-to-down directions of the electric toothbrush, and the elastic portion approaches the rear of the electric toothbrush as it extends to both the left and right sides.

4. 2. The electric toothbrush according to claim 1, wherein the drive frame, the elastic portion, the connecting portion, and the support frame are integrally formed.

5. the connecting portion is disposed at an upper end of the elastic portion in the vertical direction of the electric toothbrush, 2. The electric toothbrush according to claim 1, wherein the tenon and the connecting portion are connected by integral molding using an injection molding process.

6. 2. The electric toothbrush according to claim 1, wherein the elastic portion has a rectangular cross section, and the connecting portion and the elastic portion have the same dimensions in the front-to-rear direction of the electric toothbrush.

7. The electric toothbrush of claim 1, wherein the upper end of the frame body is formed into a first inverted U-shaped portion whose opening expands to both the left and right sides of the electric toothbrush, the tenon extends upward from the top end of the first inverted U-shaped portion, the connecting portion and the elastic portion jointly form a second inverted U-shaped portion whose opening expands to both the left and right sides of the electric toothbrush, and the second inverted U-shaped portion is externally fitted onto the outside of the first inverted U-shaped portion at a distance so as to have the same shape as the first inverted U-shaped portion.

8. 2. The electric toothbrush according to claim 1, wherein a weight is connected to the frame body.

9. The electric toothbrush of claim 8, wherein an eccentric block is connected to the output shaft of the motor, and the motor drives and rotates the eccentric block to cause the drive frame to oscillate or vibrate, and the eccentric block is arranged below the motor and the weight is arranged below the eccentric block in the vertical direction of the electric toothbrush.

10. 2. The electric toothbrush according to claim 1, wherein the frame is provided with a battery chamber for mounting a battery.

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