Electric toothbrush

Abstract

The utility model provides an electric toothbrush which comprises a support (1) provided with a hollow part (13); the support (1) is provided with a hollow part (13), the driving frame (2) is elastically connected to the support (1), the driving frame (2) is located in the hollow part (13), the driving frame (2) and the support (1) are spaced, and the driving frame (2) is provided with a tenon joint piece (21) used for being connected with a toothbrush head; the motor (5) is arranged on the driving frame (2), and the motor (5) can drive the driving frame (2) to swing or vibrate relative to the support (1) when working, so that the tenon joint piece (21) can drive the toothbrush head to swing or vibrate.

Description

Technical Field

[0001] The present application relates to the technical field of oral cleaning, and in particular to an electric toothbrush. Background Art

[0002] The electric toothbrush uses the rapid rotation or vibration of the motor to generate high-frequency vibrations in the brush head, which instantly breaks down the toothpaste into fine foam and deeply cleans the gaps between teeth. At the same time, the vibration of the bristles can promote blood circulation in the mouth and massage the gum tissue.

[0003] In the prior art, the drive mechanism of the built-in eccentric vibration motor is large in size, complex in structure, and high in cost. In addition, the brush handle vibrates strongly, the noise is loud, the vibration output to the toothbrush head is greatly attenuated, and the energy consumption is high. Utility Model Content

[0004] In order to overcome or alleviate the problems existing in the above-mentioned prior art, the present application aims to propose an electric toothbrush, which enables the vibration of the motor to be transmitted to the toothbrush head to a greater extent, thereby reducing energy consumption.

[0005] The present application proposes an electric toothbrush, comprising:

[0006] A bracket, wherein the bracket is provided with a hollow portion;

[0007] A driving frame, wherein the driving frame and the bracket are connected via a connecting portion and an elastic portion, the driving frame is located in the hollow portion, the driving frame and the bracket are spaced apart, the driving frame has a joint for connecting a toothbrush head, the joint is located at the upper end of the driving frame, the connecting portion is connected to the joint, the connecting portion is connected to the bracket via the elastic portion, the elastic portion is located on the left and right sides of the connecting portion in the left and right direction of the electric toothbrush, and a gap is formed between the joint and the elastic portion; and

[0008] The motor is arranged on the driving frame, and the motor can drive the driving frame to swing or vibrate relative to the bracket, so that the joint can drive the toothbrush head to swing or vibrate.

[0009] In at least one possible embodiment, the elastic portion extends along a vertical direction of the electric toothbrush, and the connecting portion extends along a horizontal direction of the electric toothbrush.

[0010] In at least one possible embodiment, in the up-down direction, the connecting portion is located at the lower end of the elastic portion, and the connecting portion and the elastic portion form a U-shape, or

[0011] In the up-down direction of the electric toothbrush, the connecting portion is located at an upper end of the elastic portion, and the connecting portion and the elastic portion are formed in an N-shape.

[0012] In at least one possible embodiment, in the up-down direction, the joint member extends beyond the uppermost end of the elastic portion.

[0013] In at least one possible embodiment, the joint is provided with an annular groove, and the annular groove and the elastic portion are located at the same position in the up-down direction.

[0014] In at least one possible embodiment, the joint is located between the two elastic parts, and a distance between the joint and the elastic parts is 0.5 to 1 mm.

[0015] In at least one possible embodiment, the connecting portion and the elastic portion both extend in the left-right direction of the electric toothbrush, and the connecting portion and the elastic portion are formed in a straight line shape.

[0016] In at least one possible embodiment, the elastic portion is sheet-shaped, and a thickness of the elastic portion along the front-to-back direction of the electric toothbrush is greater than a thickness along the left-to-right direction of the electric toothbrush.

[0017] In at least one possible embodiment, a shock absorber is provided in the gap between the driving frame and the bracket. The shock absorber is elastic and can cushion the impact of the driving frame on the bracket when the driving frame swings or vibrates.

[0018] In at least one possible embodiment, the joint, the connecting portion, the elastic portion, and the bracket are integrally formed.

[0019] By adopting the above technical solution, the motor drives the driving frame to swing or vibrate relative to the bracket 1, so that the joint drives the toothbrush head to swing or vibrate, so that less vibration is transmitted to the brush handle, thereby reducing energy consumption and improving the brushing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 An exploded view showing a partial structure of an electric toothbrush according to a first embodiment of the present application.

[0021] Figure 2 A cross-sectional view showing a handle of an electric toothbrush according to a first embodiment of the present application is shown.

[0022] Figure 3 A cross-sectional view showing a handle of an electric toothbrush according to a first embodiment of the present application is shown.

[0023] Figure 4 A front view showing a bracket and a drive frame of an electric toothbrush according to a first embodiment of the present application is shown.

[0024] Figure 5A top view of a bracket and a drive frame of an electric toothbrush according to a first embodiment of the present application is shown.

[0025] Figure 6 A front view showing a bracket and a drive frame of an electric toothbrush according to a second embodiment of the present application is shown.

[0026] Figure 7 A front view showing a bracket and a drive frame of an electric toothbrush according to a third embodiment of the present application.

[0027] Figure 8 A front view showing a bracket and a drive frame of an electric toothbrush according to a fourth embodiment of the present application is shown.

[0028] Figure 9 A front view showing a bracket and a drive frame of an electric toothbrush according to a fifth embodiment of the present application is shown.

[0029] Description of Reference Numerals

[0030] 1 bracket 11 battery 12 circuit board 13 hollow part 14 waterproof ring 15 waterproof ring installation hole

[0031] 2 driving frame 21 joint 211 ring groove 22 motor groove 23 counterweight groove 24 elastic part 25 connecting part 26 shock absorber installation groove

[0032] 3 counterweights

[0033] 4 pressure-sensitive switches

[0034] 5 motor 51 eccentric block

[0035] 6 shock absorbers

[0036] 7 Tenon

[0037] A up and down direction F front and back direction R left and right direction DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the above-mentioned purposes, features and advantages of the present application, this section describes in detail the specific embodiments of the present application in conjunction with the accompanying drawings. In addition to the various embodiments described in this section, the present application can also be implemented in other different ways. Without violating the spirit of the present application, those skilled in the art can make corresponding improvements, deformations and substitutions. Therefore, the present application is not limited to the specific embodiments disclosed in this section. The scope of protection of this application shall be based on the claims.

[0039] (First embodiment)

[0040] In the following description, the vertical direction A of an electric toothbrush represents the direction in which the electric toothbrush's axis extends, with the upper side representing the side of the toothbrush head and the lower side representing the side of the handle. The front-to-back direction F of an electric toothbrush represents the direction in which the bristles of the electric toothbrush head extend, with the front side representing the side with the bristles facing forward and the rear side representing the side with the bristles facing away. For an electric toothbrush, the left-right direction R is perpendicular to both the vertical direction A and the front-to-back direction F.

[0041] like Figures 1 to 5 As shown, an embodiment of the present application provides an electric toothbrush, which includes a brush handle and a toothbrush head (not shown). The brush handle includes a main body 100, a bracket 1, a drive frame 2, a counterweight 3, a pressure sensing switch 4, a motor 5, a shock absorber 6, and a tenon 7. The bracket 1, the drive frame 2, the counterweight 3, the pressure sensing switch 4, the motor 5, and the shock absorber 6 can be disposed inside the main body 100. The tenon 7 extends from the main body 100 for connecting to the toothbrush head. The toothbrush head can be detachably connected to the tenon 7.

[0042] The bracket 1 can be used to install or fix other components such as a battery 11 and a circuit board 12. The bracket 1 can be provided with a hollow portion 13, which can be located in the middle position in the left-right direction R of the electric toothbrush, and the hollow portion 13 can pass through along the front-back direction F of the electric toothbrush.

[0043] The pressure sensing switch 4 can be connected to the circuit board 12. The pressure sensing switch 4 is used to control the switch of the electric toothbrush. The pressure sensing switch 4 allows the user to conveniently control the opening and closing of the electric toothbrush, thereby improving the convenience of user operation and the user experience.

[0044] The drive frame 2 may include a motor slot 22 and a counterweight slot 23, and a joint 21 may be connected to the upper side of the drive frame 2. The joint 21 may be cylindrical and fixedly connected to the tenon 7, which is used to connect the toothbrush head.

[0045] The drive frame 2 and the bracket 1 can be elastically connected via an elastic portion 24. The drive frame 2 can be located in the hollow portion 13, and the drive frame 2 can be spaced apart from the bracket 1 as a whole. A motor 5 can be connected to the drive frame 2. The vibration of the motor 5 can cause the drive frame 2 to swing or vibrate relative to the bracket 1, thereby transmitting the swing or vibration to the tenon 21. By elastically connecting the drive frame 2 and the bracket 1 and separating them as a whole, the toothbrush head connected to the tenon 7 has a certain degree of freedom of movement, allowing the toothbrush head to be subjected to forces in different directions, thereby better cleaning teeth and massaging gums.

[0046] In the vertical direction A of the electric toothbrush, the joint 21 can be located above the motor slot 22. The output shaft of the motor 5 can be mounted with an eccentric weight 51 to generate vibration when the motor 5 rotates. The motor 5 is accommodated in the motor slot 22. The counterweight slot 23 can be located above the motor slot 22, with the counterweight 3 accommodated therein. In the vertical direction A of the electric toothbrush, the eccentric weight 51 can be located below the motor 5, and the counterweight 3 can be located above the motor 5.

[0047] The counterweight 3 can increase the overall weight of the drive frame 2, balance the vibration generated when the motor is running, avoid imbalance caused by vibration, keep the electric toothbrush stable during use, and make the toothbrush head move more smoothly and efficiently.

[0048] The driving frame 2 can be elastically connected to the bracket 1 through the joint 21, the connecting portion 25 and the elastic portion 24. The connecting portion 25 can be connected to the joint 21, and the connecting portion 25 can be sheet-shaped, and the connecting portion 25 can surround the joint 21. The joint 21 is connected to the elastic portion 24 through the connecting portion 25, and the connecting portion 25 is connected to the bracket 1 through two elastic portions 24, and the elastic portions 24 can be located on the left and right sides of the connecting portion 25 in the left-right direction R. The dimensions of the connecting portion 25 and the elastic portion 24 along the front-to-back direction F can be the same. The connecting portion 25 and the elastic portion 24 can be formed into a U-shape, the connecting portion 25 forming the bottom of the U, and the elastic portion 24 including two elastic sheets forming two arms of the U. In the up-down direction A, the connecting portion 25 can be located at the lower end of the elastic portion 24. The elastic sheet can be sheet-shaped extending along the up-down direction A and the front-to-back direction F. There is a gap between the joint 21 and the elastic part 24. The joint 21 is located between the two elastic sheets. The interval between the joint 21 and the elastic sheet can be 0.5 to 1 mm. The width of the elastic part 24 (the dimension along the front-to-back direction F) can be 4.9 to 5.5 mm. The dimension (thickness) of the connecting member 25 along the left-right direction can be above 1.5 mm. It can be understood that the thickness of the connecting member 25 can be adaptively changed according to the length of the joint 21. The elastic part 24 can drive the motor 5 to swing or vibrate relative to the bracket 1. The elastic part 24 can absorb and buffer external forces, such as vibration or impact during use, reduce damage to the overall structure, and improve service life and grip comfort.

[0049] It can be understood that the driving frame can move in multiple directions under the drive of the motor 5. This multi-directional movement can not only cover different surfaces of the teeth, but also more effectively remove dirt and plaque in the gaps between the teeth.

[0050] The elastic portion 24 can be arranged on the left and right sides of the connecting portion 25 in the left-right direction R. The elastic portion 24 can be a bendable sheet, and the size (thickness) of the sheet-shaped elastic portion in the front-to-back direction can be greater than the size (thickness) in the left-to-right direction. Here, the size (thickness) of the sheet-shaped elastic portion in the left-to-right direction does not include the size (thickness) of the gap between the two elastic portions 24, that is, it refers to the thickness of the two elastic portions 24. As a result, the elastic portion is easily bent and deformed in the left-to-right direction R of the electric toothbrush, but not easily bent and deformed in the front-to-back direction F of the electric toothbrush (it can still be deformed). In this way, the driving frame 2 can easily swing in the left-to-right direction relative to the bracket 1, thereby driving the toothbrush head to swing or vibrate in the left-to-right direction R, thereby cleaning the teeth and / or gums.

[0051] The joint 21 may have a fulcrum. It is understood that the fulcrum is a virtual position defined artificially and is not a structural support point. When the motor 5 drives the drive frame 2 to swing or vibrate, the drive frame 2 may swing or vibrate around the fulcrum.

[0052] Optionally, in this embodiment, the joint 21, the elastic portion 24, the connecting portion 25 and the bracket 1 can be integrally formed, so that the overall structural strength and stability of the bracket 1 and the driving frame 2 are higher.

[0053] Optionally, the joint 21, the elastic portion 24, the connecting portion 25, and the bracket 1 can all be made of a mixture of polyamide 66 (PA66) and glass fiber. In other possible embodiments, materials with a tensile strength of 90-260 MPa and a flexural modulus of 3500-8000 MPa can be selected, including but not limited to materials mixed with polyamide 66 and glass fiber in different proportions, materials mixed with polyamide 6 and glass fiber in different proportions, and polypropylene. As the content of glass fiber increases, the tensile strength (in MPa) and flexural modulus (in MPa) of the material can be improved, thereby improving the rigidity and strength of the material.

[0054] Furthermore, the joint 21, the elastic part 24, the connecting part 25 and the bracket 1 can all be made of a mixture of polyamide 66 (PA66) and 15% to 30% glass fiber, so that the material can have higher rigidity and strength, and the impact resistance can meet the requirements.

[0055] The front end of the bracket 1 may be provided with, for example, two waterproof ring mounting holes 15, located on the left and right sides of the joint 21 in the left-right direction R of the electric toothbrush. These waterproof ring mounting holes 15 may be used to connect a waterproof ring 14, which prevents water or foam from entering the interior of the main body 100.

[0056] Shock absorber 6 can be connected to drive frame 2, with at least a portion of shock absorber 6 located in the gap between drive frame 2 and bracket 1. Shock absorber 6 is elastic, for example, it can be made of rubber. When the drive frame swings or vibrates, shock absorber 6 can effectively absorb and mitigate the vibration transmitted to bracket 1, reducing the intensity of the vibration transmitted to the user's hand and improving user comfort. For example, shock absorber 6 can be installed on drive frame 2 along the front-to-back direction F, and the dimension of shock absorber 6 along the left-to-right direction R is larger than the dimension of drive frame 2 along the left-to-right direction R, so that a portion of shock absorber 6 is located in the gap between drive frame 2 and bracket 1.

[0057] The vibration dampening member 6 protects the motor 5 and other components by buffering vibrations, and also reduces the noise generated by the motor 5 during operation, making the electric toothbrush quieter during use and improving the user experience. Furthermore, the shock absorber 6 can buffer external impacts, reduce damage caused by falls, and extend the service life of the electric toothbrush.

[0058] Furthermore, the driving frame 2 may be provided with a shock absorber mounting groove 26, and the shock absorber 6 may be mounted in the shock absorber mounting groove 26. In the up-down direction A of the electric toothbrush, the shock absorber mounting groove 26 may be provided on the lower side of the motor groove 22, and the shock absorber 6 may be provided on the lower side of the motor 5.

[0059] When using the electric toothbrush of the present application, the user turns on the electric toothbrush via the induction switch 4, connects the power supply, and causes the motor 5 to start rotating. The motor 5 drives the eccentric weight 51 to rotate, causing the drive frame 2 to swing or vibrate about the fulcrum, transmitting power to the tenon 21. The tenon 7 enables the toothbrush head to swing or vibrate in multiple directions. The drive frame 2 and the toothbrush head are located at either end of the fulcrum. The principle of leverage is used to amplify the swing or vibration of the drive frame 2 at the bristles of the toothbrush head. This swing or vibration can effectively clean the tooth surface and hard-to-reach areas, improving the brushing effect.

[0060] The electric toothbrush of the present application has the following beneficial effects.

[0061] (1) The motor 5 drives the drive frame 2 to swing or vibrate relative to the bracket 1, thereby driving the tenon 21 to cause the toothbrush head to swing or vibrate synchronously. This design can effectively reduce the transmission of vibration to the brush handle, thereby reducing energy consumption and improving the brushing effect. In addition, the structure is simple and can easily convert the rotational motion of the motor 5 into the swing or vibration of the tenon 21, making the production cost low.

[0062] (2) The shock-absorbing member 6 absorbs and cushions the impact of the driving frame 2 on the bracket 1, so that less vibration is transmitted to the user's hand, the intensity of the vibration transmitted to the user's hand is weakened, the comfort of use is improved, and the noise is reduced, making the electric toothbrush quieter during use and improving the user experience.

[0063] (3) When the electric toothbrush falls, the shock absorbing member 6 can buffer the external impact, so that the motor 5 is less impacted, thereby reducing the possibility of motor damage and extending the service life of the electric toothbrush.

[0064] (4) The counterweight 3 can increase the overall weight of the drive frame 2, thereby balancing the vibration generated when the motor 5 is running, so that the electric toothbrush remains stable during use and the movement of the toothbrush head is smoother and more efficient.

[0065] (5) The elastic portion 24 can absorb and buffer the external force applied to the toothbrush head, such as vibration or impact during use, thereby reducing damage to the overall structure and improving service life and grip comfort.

[0066] (6) The joint 21, the elastic portion 24, the connecting portion 25 and the bracket 1 are integrally formed, so that the overall structural strength of the bracket 1 and the driving frame 2 is high.

[0067] The present application is not limited to the above embodiments, and those skilled in the art can make various modifications to the above embodiments under the guidance of the present application without departing from the scope of the present application.

[0068] (1) In the above embodiment, the shock absorber 6 is provided on the driving frame 2, but the present application is not limited thereto. The shock absorber may also be connected to the bracket, as long as at least a portion of the shock absorber is located in the gap between the driving frame and the bracket.

[0069] (2) In the above embodiment, the elastic portion 24 is sheet-shaped, but the present application is not limited thereto. The elastic portion may be columnar or in other shapes. For example, the sheet-shaped elastic portion in the above embodiment may be replaced by a plurality of columnar elastic portions.

[0070] (Second embodiment)

[0071] The electric toothbrush of the second embodiment of the present application is similar in overall structure to the electric toothbrush of the first embodiment, and the same reference numerals are used to represent the same or similar parts in the two embodiments. The main difference between the second embodiment and the first embodiment is the structure of the joint 21.

[0072] like Figure 6 As shown, the joint 21 can extend in the up-down direction A to the uppermost end beyond the elastic portion 24. A longer joint 21 can make the toothbrush head farther away from the fulcrum, and utilize the lever principle to make the toothbrush head swing with a larger amplitude.

[0073] (Third embodiment)

[0074] The electric toothbrush of the third embodiment of the present application is similar in overall structure to the electric toothbrush of the second embodiment, and the same reference numerals are used to represent the same or similar parts in the two embodiments. The main difference between the third embodiment and the second embodiment is the structure of the joint 21.

[0075] like Figure 7 As shown, the joint 21 can be provided with an annular groove 211, and the annular groove 211 and the elastic portion 24 can be in the same position in the up and down direction A, so that the gap between the joint 21 and the elastic portion 24 can be larger, providing the joint 21 with more sufficient swing space.

[0076] (Fourth embodiment)

[0077] The electric toothbrush of the fourth embodiment of the present application is similar in overall structure to the electric toothbrush of the second embodiment, and the same reference numerals are used to represent the same or similar parts in the two embodiments. The main difference between the fourth embodiment and the second embodiment is the structure of the elastic part 24.

[0078] like Figure 8 As shown, the connecting portion 25 and the elastic portion 24 can be formed into an N shape, with the connecting portion 25 forming the top of the N and the elastic portion 24 including an elastic sheet forming two arms of the N. In the up-down direction A, the connecting portion 25 can be located at the upper end of the elastic portion 24.

[0079] The joint 21 may be provided with a recess, and the recess and the elastic portion 24 may be at the same position in the up and down direction A, so that the gap between the joint 21 and the elastic portion 24 may be larger, providing the joint 21 with more sufficient swinging space.

[0080] (Fifth embodiment)

[0081] The electric toothbrush of the fifth embodiment of the present application has a similar overall structure to the electric toothbrush of the second embodiment, and the same reference numerals are used to represent the same or similar parts in the two embodiments. The main difference between the fifth embodiment and the second embodiment is the structure of the elastic part 24.

[0082] like Figure 9 As shown, the connecting portion 25 and the elastic portion 24 both extend along the left-right direction R and the front-back direction F. The connecting portion 25 and the elastic portion 24 can be formed into a straight line. The elastic portion 24 includes an elastic sheet. Two elastic portions 24 can be arranged at the left and right ends of the connecting portion 25.

[0083] It should be understood that at least some aspects or features of the above-mentioned embodiments, examples or examples may be appropriately combined.

[0084] It is understood that in this application, when the number of parts or components is not specifically limited, the number may be one or more, and the term "plurality" herein refers to two or more. Where the number of parts or components is shown in the drawings and / or described in the specification as a specific number, such as two, three, or four, the specific number is generally illustrative and not restrictive, and may be understood as a plurality, i.e., two or more. However, this does not mean that this application excludes the case of one.

[0085] In this application, unless otherwise clearly stated or limited, terms such as "install", "assemble", "connect", "connect", "couple", "link", "abut", "connect", "interconnect", "communicate", "conduct", "fix", "fasten", etc. should be understood in a broad sense, for example, they can be direct or indirect. For example, with respect to connection, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly stated or limited. For example, with respect to connectivity / conduction, it can be direct connectivity / conduction or indirect connectivity / conduction through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0086] In the present application, unless otherwise clearly stated or limited, a component provided on / installed on / located on / accommodated on / placed in, within, inside, etc. another component may be any of the following two situations: a part or most of the one component is located in the other component; and the one component is completely accommodated in the other component.

[0087] While the present application has been described in detail using the above-described embodiments, it will be apparent to those skilled in the art that the present application is not limited to the embodiments described in this specification. The present application can be modified and implemented as modified embodiments without departing from the subject matter and scope of the present application as defined by the claims. Therefore, the descriptions in this specification are for illustrative purposes only and do not have any limiting meaning with respect to the present application.

Claims

1. An electric toothbrush, characterized in that: include: A bracket (1), wherein the bracket (1) is provided with a hollow portion (13); A driving frame (2), wherein the driving frame (2) and the bracket (1) are connected via a connecting portion (25) and an elastic portion (24), the driving frame (2) is located in the hollow portion (13), the driving frame (2) and the bracket (1) are spaced apart, the driving frame (2) has a mortise and tenon piece (21) for connecting a toothbrush head, the mortise and tenon piece (21) is located at the upper end of the driving frame (2), the connecting portion (25) is connected to the mortise and tenon piece (21), the connecting portion (25) is connected to the bracket (1) via the elastic portion (24), the elastic portion (24) is located on the left and right sides of the connecting portion (25) in the left-right direction (R) of the electric toothbrush, and a gap is provided between the mortise and tenon piece (21) and the elastic portion (24); and A motor (5), wherein the motor (5) is arranged on the drive frame (2), and when the motor (5) is in operation, it can drive the drive frame (2) to swing or vibrate relative to the bracket (1), so that the joint (21) can drive the toothbrush head to swing or vibrate.

2. The electric toothbrush according to claim 1, wherein The elastic portion (24) extends along the up-down direction (A) of the electric toothbrush, and the connecting portion (25) extends along the left-right direction (R) of the electric toothbrush.

3. The electric toothbrush according to claim 2, wherein: In the up-down direction (A), the connecting portion (25) is located at the lower end of the elastic portion (24), and the connecting portion (25) and the elastic portion (24) are formed into a U shape, or In the up-down direction (A), the connecting portion (25) is located at the upper end of the elastic portion (24), and the connecting portion (25) and the elastic portion (24) are formed in an N-shape.

4. The electric toothbrush according to claim 1, wherein In the up-down direction (A) of the electric toothbrush, the joint (21) extends beyond the uppermost end of the elastic portion (24).

5. The electric toothbrush according to claim 2 or 4, characterized in that The joint (21) is provided with an annular groove (211), and the annular groove (211) and the elastic portion (24) are located at the same position in the up-down direction (A).

6. The electric toothbrush according to claim 2 or 4, characterized in that The joint piece (21) is located between the two elastic parts (24), and the interval between the joint piece (21) and the elastic parts (24) is 0.5 to 1 mm.

7. The electric toothbrush according to claim 1, wherein The connecting portion (25) and the elastic portion (24) both extend along the left-right direction (R) of the electric toothbrush, and the connecting portion (25) and the elastic portion (24) are formed into a straight line shape.

8. The electric toothbrush according to claim 1, wherein The elastic part (24) is sheet-shaped, and the thickness of the elastic part (24) along the front-back direction (F) of the electric toothbrush is greater than the thickness along the left-right direction (R) of the electric toothbrush.

9. The electric toothbrush according to claim 1, wherein A shock-absorbing member (6) is provided in the gap between the driving frame (2) and the bracket (1); the shock-absorbing member (6) is elastic and can buffer the impact of the driving frame (2) on the bracket (1) when the driving frame (2) swings or vibrates.

10. The electric toothbrush according to claim 1, wherein The joint (21), the connecting portion (25), the elastic portion (24) and the bracket (1) are integrally formed.

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