Electric toothbrush

Abstract

The present disclosure proposes an electric toothbrush comprising: a holder (1) provided with a hollow section (13); a drive frame (2), wherein the drive frame (2) is elastically connected to the holder (1), the drive frame (2) is located in the hollow section (13), the drive frame (2) and the holder (1) are spaced apart from each other, and the drive frame (2) has a pin receiving element (21) for connection with a toothbrush head; and a motor (5), wherein the motor (5) is arranged in the drive frame (2), and the motor (5) functions to drive the drive frame (2) to oscillate or swing relative to the holder (1), so that the pin receiving element (21) is able to drive the toothbrush head to oscillate or swing.

Description

Technical field

[0001] The present disclosure relates to the technical field of oral hygiene, and in particular to an electric toothbrush. Technical background

[0002] Electric toothbrushes use a high-frequency vibration mechanism to quickly rotate or vibrate the brush heads. This instantly breaks down toothpaste into a fine foam, thoroughly cleaning between teeth. Simultaneously, the vibrating bristles can stimulate blood circulation in the mouth and provide a massaging effect to the gums.

[0003] In the state of the art, a drive mechanism with a built-in eccentric vibration motor is large in volume, complex in design, and expensive; moreover, the vibration level at the brush handle is high, the operation is noisy, the vibrations emitted to the toothbrush head are strongly dampened, and the energy consumption is high. Subject of the revelation

[0004] In order to overcome or mitigate the above-mentioned problems existing in the prior art, the present disclosure aims to propose an electric toothbrush in which vibrations of the motor can be transmitted more to the toothbrush head, thereby reducing energy consumption.

[0005] The present disclosure proposes an electric toothbrush comprising: a holder which is provided with a hollow section; a drive frame, wherein the drive frame is elastically connected to the holder, the drive frame is located in the hollow section, the drive frame and the holder are spaced apart from each other, and the drive frame has a pin receiving element for connection to a toothbrush head; and a motor, wherein the motor is arranged in the drive frame, and the motor functions to drive the drive frame to oscillate or swing relative to the holder, so that the pin receiving element is able to drive the toothbrush head to oscillate or swing.

[0006] In at least one possible embodiment, the drive frame and the holder are connected to each other via a connecting section and an elastic section, the connecting section is connected to the pin receiving element, and in a left / right direction of the electric toothbrush, the elastic section is located on the left and right sides of the connecting section.

[0007] In at least one possible embodiment, the elastic section is plate-shaped, and the thickness of the elastic section along a forward / backward direction of the electric toothbrush is greater than its thickness along the left / right direction of the electric toothbrush.

[0008] In at least one possible embodiment, the electric toothbrush further comprises a pin that projects from a front face of a main body of the electric toothbrush in an upward / downward direction and that serves to connect to the toothbrush head, wherein the pin receiving element and the pin are connected to each other.

[0009] In the up / down direction of the electric toothbrush, the elastic section is located on the front of the motor, and the pin is located on the front of the elastic section.

[0010] In at least one possible embodiment, a damping element is provided in a gap between the drive frame and the holder, the damping element has an elasticity, and when the drive frame oscillates or swings, the damping element is able to dampen a shock from the drive frame to the holder.

[0011] In at least one possible embodiment, at least part of the damping element is located on the left and right sides of the drive frame in the left / right direction of the electric toothbrush.

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

[0013] In at least one possible embodiment, the output shaft of the motor is connected to an eccentric weight; the drive frame is enabled to oscillate or swing by the motor driving the eccentric weight to rotate; and in the up / down direction of the main body of the electric toothbrush, the eccentric weight is located on the underside of the motor, and the counterweight is located on the top side of the motor.

[0014] In at least one possible embodiment, a mounting hole for waterproof rings is provided at the front end of the holder, and a waterproof ring is fitted in the mounting hole for waterproof rings.

[0015] In at least one possible embodiment, the pin receiving element, the connecting section, the elastic section and the holder are designed as a single piece.

[0016] In at least one possible embodiment, the material of the holder and the material of the drive frame each have a tensile strength of 90 to 260 MPa and a flexural modulus of 3500 to 8000 MPa.

[0017] By adopting the above technical solutions, it is made possible that, by the motor driving the drive frame to pendulum or oscillate relative to the holder 1, the pin receiving element is caused to drive the toothbrush head to pendulum or oscillate, so that vibrations are transferred less to the brush handle, thereby reducing energy consumption and achieving a better tooth cleaning effect. Description of drawings Fig. Figure 1 shows an exploded view of a partial structure of an electric toothbrush according to a first embodiment of the present disclosure. Fig. Figure 2 shows a sectional view of a brush handle of the electric toothbrush according to the first embodiment of the present disclosure. Fig. Figure 3 shows a sectional view of the brush handle of the electric toothbrush according to the first embodiment of the present disclosure. Fig. Figure 4 shows a front view of a holder and a drive frame of the electric toothbrush according to the first embodiment of the present disclosure. Fig. Figure 5 shows a top view of the holder and drive frame of the electric toothbrush according to the first embodiment of the present disclosure. Fig. Figure 6 shows a front view of a holder and drive frame of an electric toothbrush according to a second embodiment of the present disclosure. Fig. Figure 7 shows a front view of a holder and drive frame of an electric toothbrush according to a third embodiment of the present disclosure. Fig. Figure 8 shows a front view of a holder and drive frame of an electric toothbrush according to a fourth embodiment of the present disclosure. Fig. Figure 9 shows a front view of a holder and drive frame of an electric toothbrush according to a fifth embodiment of the present disclosure. Explanation of reference symbols

[0018] 1: Holder; 11: Battery; 12: Circuit board; 13: Hollow section; 14: Waterproof ring; 15: Mounting hole for waterproof rings; 2: Drive frame; 21: Pin mounting element; 211: Ring slot; 22: Motor slot; 23: Counterweight slot; 24: Elastic section; 25: Connecting section; 26: Mounting slot for damping elements; 3: Counterweight; 4: Pressure induction switch; 5: Motor; 51: Eccentric weight; 6: Damping element; 7: Cones; A: Upward / downward direction; F: Forward / backward direction; and R: Left / right direction. Detailed description of embodiments

[0019] To more clearly explain the above-mentioned task, features, and advantages of this disclosure, specific embodiments of this disclosure are illustrated in detail in this part with reference to the drawings. Besides the respective embodiments described in this part, this disclosure can be implemented in various other ways. Without departing from the spirit of this disclosure, a person skilled in the art could make corresponding developments, modifications, and substitutions. Therefore, this disclosure is not limited to the specific embodiments disclosed here in this part. The scope of protection of this disclosure is to be defined by the claims. (First embodiment)

[0020] In the following description, an up / down direction A of an electric toothbrush refers to the direction of extension of the electric toothbrush's axis, with a top being the side on which a toothbrush head is located and a bottom being the side on which a brush handle is located. A forward / backward direction F of the electric toothbrush refers to the direction of extension of the bristles of the electric toothbrush's brush head, with a front being the side toward which the bristles face and a back being the side toward which the bristles face away. A left / right direction R of the electric toothbrush is perpendicular to both the up / down direction A and the forward / backward direction F of the electric toothbrush.

[0021] As in Fig. As shown in Figures 1 to 5, one embodiment of the present disclosure proposes an electric toothbrush comprising a brush handle and a toothbrush head (not shown), wherein the brush handle includes a main body 100, a holder 1, a drive frame 2, a counterweight 3, a pressure induction switch 4, a motor 5, a damping element 6, and a pin 7. The holder 1, the drive frame 2, the counterweight 3, the pressure induction switch 4, the motor 5, and the damping element 6 may be arranged inside the main body 100, and the pin 7 projects from the main body 100 to connect the toothbrush head. The toothbrush head is detachably and interchangeably connected to the pin 7.

[0022] The holder 1 can be used for mounting or fastening another component, such as a battery 11, a circuit board 12, etc. The holder 1 can be provided with a hollow section 13. The hollow section 13 can be in a central position in the left / right direction R of the electric toothbrush, and the hollow section 13 can be continuous along the forward / backward direction F of the electric toothbrush.

[0023] The pressure induction switch 4 can be connected to the circuit board 12; the pressure induction switch 4 is used to control the turning on and off of the electric toothbrush; and the pressure induction switch 4 can enable a user to conveniently control the turning on and off of the electric toothbrush, thereby improving the user's ease of use and user experience.

[0024] The drive frame 2 can include a motor slot 22 and a counterweight slot 23, and a pin receiving element 21 can be connected to the top of the drive frame 2. The pin receiving element 21 can be cylindrical, the pin receiving element 21 and the pin 7 are firmly connected to each other, and the pin 7 serves to connect to the toothbrush head.

[0025] The drive frame 2 and the holder 1 can be elastically connected to each other via an elastic section 24. The drive frame 2 can be located within the hollow section 13, and the drive frame 2 is spaced apart from the holder 1 as a whole. The motor 5 can be connected to the drive frame 2, and the vibrations of the motor 5 can cause the drive frame 2 to oscillate or vibrate relative to the holder 1, thereby transmitting the oscillation or vibration to the pin receiving element 21. Because the drive frame 2 is elastically connected to the holder 1 and spaced apart from it as a whole, the toothbrush head connected to the pin 7 can have a certain degree of freedom of movement, allowing the toothbrush head to be subjected to forces in different directions, thus improving tooth cleaning and massaging the gums.

[0026] In the up / down direction A of the electric toothbrush, the pin receiving element 21 can be located on the top of the motor slot 22. An eccentric weight 51 can be attached to the output shaft of the motor 5 so that vibrations can be generated when the motor 5 rotates, and the motor 5 is received in the motor slot 22. The counterweight slot 23 can be located on the top of the motor slot 22, and the counterweight 3 is received in the counterweight slot 23. In the up / down direction A of the electric toothbrush, the eccentric weight 51 can be located on the underside of the motor 5, and the counterweight 3 can be located on the top of the motor 5.

[0027] The counterweight 3 can increase the overall weight of the drive frame 2, compensate for vibrations generated during motor operation, and avoid imbalance caused by vibrations, so that the electric toothbrush remains stable during use, therefore the movement of the toothbrush head is smoother and more efficient.

[0028] The drive frame 2 can be elastically connected to the holder 1 via the pin mounting element 21, a connecting section 25, and the elastic section 24. The connecting section 25 can be connected to the pin mounting element 21, the connecting section 25 can be plate-shaped, and the connecting section 25 can surround the pin mounting element 21. The pin mounting element 21 is connected to the elastic section 24 via the connecting section 25, the connecting section 25 is connected to the holder 1 via two elastic sections 24, and the elastic sections 24 can be located on the left and right sides of the connecting section 25 in the left / right direction R. The dimensions of the connecting section 25 and the elastic sections 24 along the forward / reverse direction F can be identical.The connecting section 25 and the elastic section 24 can form a U-shape, with the connecting section 25 forming the base of the U-shape and the elastic section 24 comprising two elastic plates that form the two legs of the U-shape. In the upward / downward direction A, the connecting section 25 can be located at the lower end of the elastic section 24. The elastic plates can be plates extending along both the upward / downward direction A and the forward / backward direction F. There is clearance between the tenon receiving element 21 and the elastic section 24. The tenon receiving element 21 is located between the two elastic plates and can be spaced 0.5 to 1 mm from the elastic plates. The elastic section 24 can have a width (the dimension along the forward / backward direction F) of 4.9 to 5.5 mm.The dimension (thickness) of the connecting element 25 along the left / right direction can exceed 1.5 mm. It is understood that the thickness of the connecting element 25 can be adjusted to the length of the pin receiving element 21. The elastic section 24 causes the motor 5 to drive the drive frame 2 to oscillate or swing relative to the holder 1. The elastic section 24 can absorb and dampen external forces, such as vibrations or shocks during use, thereby reducing damage to the overall structure and increasing its service life and grip comfort.

[0029] It can be understood that the drive frame can move multidirectionally under the power of the motor 5, and such multidirectional movement can not only cover different surfaces of teeth, but can also remove dirt in interdental spaces and dental plaque more effectively.

[0030] The elastic sections 24 can be arranged on the left and right sides of the connecting section 25 in the left / right direction R. The elastic section 24 can be in the form of a bendable plate, and the dimension (thickness) of this plate-shaped elastic section along the forward / backward direction can be greater than its dimension (thickness) along the left / right direction. The dimension (thickness) of any gap between the two elastic sections 24 is not included in the dimension (thickness) of the plate-shaped elastic section along the left / right direction; that is, it is the thickness of the combined entity of the two elastic sections 24. Therefore, the elastic section is susceptible to bending and deformation along the left / right direction R of the electric toothbrush, but not susceptible to bending and deformation along the forward / backward direction F of the electric toothbrush (it is still deformable).In this way, the drive frame 2 can easily oscillate relative to the holder 1 along the left / right direction, and then drive the toothbrush head to oscillate or swing along the left / right direction R, so that teeth and / or gums are cleaned.

[0031] The pivot mounting element 21 can be provided with a pivot point, and it can be understood that the pivot point is an artificially defined virtual location and not a structurally existing support point. When the motor 5 drives the drive frame 2 to oscillate or swing, the drive frame 2 can oscillate or swing around the pivot point.

[0032] Optionally, in this embodiment the pin receiving element 21, the elastic section 24, the connecting section 25 and the holder 1 can be designed as a single piece, so that the holder 1 and the drive frame 2 have a higher overall structural strength and higher stability.

[0033] Optionally, the pin receiving element 21, the elastic section 24, the connecting section 25, and the holder 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 made of a mixture of polyamide 66 and glass fibers with varying proportions, materials made of a mixture of polyamide 6 and glass fibers with varying proportions, and polypropylene. Increasing the glass fiber content increases the tensile strength (in MPa) and the flexural modulus (in MPa) of the material, thus increasing its stiffness and strength.

[0034] Furthermore, the pin receiving element 21, the elastic section 24, the connecting section 25 and the holder 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 stiffness and strength, and its impact resistance can meet requirements.

[0035] At the front end of the holder 1, for example, two mounting holes for waterproof rings 15 can be provided, and the two mounting holes for waterproof rings 15 can be provided on the left and right sides of the pin receiving element 21 in the left / right direction R of the electric toothbrush. The mounting holes for waterproof rings 15 can be used for connection with a waterproof ring 14. The waterproof ring 14 serves to prevent the ingress of water or foam into the interior of the main body 100.

[0036] The damping element 6 can be connected to the drive frame 2. At least part of the damping element 6 is located in the clearance between the drive frame 2 and the holder 1. The damping element 6 exhibits elasticity; for example, the damping element 6 can be made of rubber. When the drive frame oscillates or swings, the damping element 6 can effectively absorb and dampen the vibrations transmitted to the holder 1, thereby reducing the intensity of the vibrations transmitted to the user's hand and improving user comfort. For example, the damping element 6 can be attached to the drive frame 2 along the forward / backward direction F, and the dimension of the damping element 6 along the left / right direction R is larger than the dimension of the drive frame 2 along the left / right direction R, so that part of the damping element 6 is located in the clearance between the drive frame 2 and the holder 1.

[0037] By damping the vibrations, the damping element 6 protects the motor 5 and other components, and reduces the noise generated during motor 5 operation, making the electric toothbrush quieter during use and improving the user experience. Furthermore, the damping element 6 also absorbs external shocks to reduce damage caused by drops and extend the electric toothbrush's lifespan.

[0038] Furthermore, the drive frame 2 can be provided with a mounting slot for damping elements 26, and the damping element 6 is installed in the mounting slot for damping elements 26. In the up / down direction A of the electric toothbrush, the mounting slot for damping elements 26 can be provided on the underside of the motor slot 22, and the damping element 6 can be arranged on the underside of the motor 5.

[0039] During use of the electric toothbrush according to the present disclosure, the user can start the electric toothbrush and switch on the power source by means of the induction switch 4, causing the motor 5 to begin rotating. As the motor 5 drives the eccentric weight 51 to rotate, the drive frame 2 is caused to oscillate or swing with the pivot point as its axis, thereby transmitting a driving force to the pin receiving element 21. The pin 7 causes the toothbrush head to oscillate or swing in several directions. The drive frame 2 and the toothbrush head are located at opposite ends of the pivot point. Utilizing the lever principle, the oscillation or swing of the drive frame 2 is amplified at the location of the bristles of the toothbrush head.Such pendulum or vibration movements allow the tooth surface and hard-to-reach areas to be effectively cleaned, thus improving the brushing effect.

[0040] The electric toothbrush according to the present disclosure has the following advantageous effects. (1) The motor 5 drives the drive frame 2 to oscillate or swing relative to the holder 1, and then drives the pin receiving element 21, causing the toothbrush head to oscillate or swing synchronously. This design effectively reduces the transmission of vibrations to the brush handle, thereby reducing energy consumption and improving the brushing effect. Furthermore, this structure is simple, and the rotational motion of the motor 5 can be easily converted into the oscillation or swing of the pin 21, thus reducing production costs. (2) The damping element 6 absorbs and dampens shocks from the drive frame 2 to the holder 1, so that vibrations are less transmitted to the user's hand, the strength of the vibrations transmitted to the user's hand is reduced and user comfort is improved; and the noise is reduced so that the electric toothbrush is quieter during use and the user experience is improved. (3) When the electric toothbrush falls, the exogenous shock can be dampened by the damping element 6, so that the motor 5 is less exposed to the shock, thereby reducing the possibility of damage to the motor 5 and extending the service life of the electric toothbrush. (4) The counterweight 3 can increase the overall weight of the drive frame 2 and thereby counteract vibrations generated during the operation of the motor 5, so that the electric toothbrush remains stable during use, resulting in smoother and more efficient movement of the toothbrush head. (5) The elastic section 24 can absorb and dampen forces exerted on the toothbrush head from the outside, such as vibrations or shocks during use, thereby reducing damage to the overall structure and increasing service life and grip comfort. (6) The pin receiving element 21, the elastic section 24, the connecting section 25 and the holder 1 are designed as a single piece, so that the holder 1 and the drive frame 2 have a higher overall structural strength.

[0041] The present disclosure is not limited to the above embodiments; under the teaching of the present disclosure, a person skilled in the art could make various modifications to the above embodiments without deviating from the scope of this disclosure. Furthermore, the following is explained. (1) In the above embodiments, the damping element 6 is provided on the drive frame 2, however, the present disclosure is not limited thereto, and the damping element may also be connected to the holder, as long as at least part of the damping element is located in the clearance between the drive frame and the holder. (2) In the above embodiments, the elastic section 24 is plate-shaped, however, the present disclosure is not limited to this, and the elastic section may be column-shaped or of another form; for example, the plate-shaped elastic section in the above embodiments may be replaced by several column-shaped elastic sections. (Second embodiment)

[0042] An electric toothbrush according to a second embodiment of this disclosure has an overall structure similar to the overall structure of the electric toothbrush according to the first embodiment; and the same reference numerals are used to identify identical or similar parts in the two embodiments. The second embodiment differs from the first embodiment mainly in the structure of the pin receiving element 21.

[0043] As in Fig. As shown in Figure 6, the pin receiving element 21 can extend in the upward / downward direction A beyond the uppermost end of the elastic section 24, whereby a longer pin receiving element 21 allows the toothbrush head to be located away from the pivot point, and a larger pendulum amplitude of the toothbrush head is enabled by utilizing the lever principle. (Third embodiment)

[0044] An electric toothbrush according to a third embodiment of this disclosure has an overall structure similar to the overall structure of the electric toothbrush according to the second embodiment; and the same reference numerals are used to identify identical or similar parts in the two embodiments. The third embodiment differs from the second embodiment mainly in the structure of the pin receiving element 21.

[0045] As in Fig. As shown in Figure 7, the pin receiving element 21 can be provided with an annular slot 211, and the annular slot 211 and the elastic section 24 can be located at the same position in the upward / downward direction A, so that a clearance between the pin receiving element 21 and the elastic section 24 can be greater to provide sufficient pendulum space for the pin receiving element 21. (Fourth embodiment)

[0046] An electric toothbrush according to a fourth embodiment of this disclosure has an overall structure similar to the overall structure of the electric toothbrush according to the second embodiment; and the same reference numerals are used to identify identical or similar parts in the two embodiments. The fourth embodiment differs from the second embodiment mainly in the structure of the elastic section 24.

[0047] As in Fig. As shown in Figure 8, an n-shape can be formed from the connecting section 25 and the elastic section 24, with the connecting section 25 forming the apex of the n-shape, while the elastic section 24 comprises elastic plates that form the two legs of the n-shape. In the upward / downward direction A, the connecting section 25 can be located at the upper end of the elastic section 24.

[0048] The pin receiving element 21 can be provided with a recess, and the recess and the elastic section 24 can be located at the same position in the upward / downward direction A, so that the clearance between the pin receiving element 21 and the elastic section 24 can be greater to provide sufficient pendulum space for the pin receiving element 21. (Fifth embodiment)

[0049] An electric toothbrush according to a fifth embodiment of this disclosure has an overall structure similar to the overall structure of the electric toothbrush according to the second embodiment; and the same reference numerals are used to identify identical or similar parts in the two embodiments. The fifth embodiment differs from the second embodiment mainly in the structure of the elastic section 24.

[0050] As in Fig. As shown in Figure 9, the connecting section 25 and the elastic section 24 can both extend along the left / right direction R and the forward / backward direction F, and a straight shape can be formed from the connecting section 25 and the elastic section 24, wherein the elastic section 24 comprises elastic plates, and both elastic sections 24 can be arranged at the left and right ends of the connecting section 25.

[0051] It should be understood that at least partial aspects or features of the above embodiments, exemplary embodiments, or examples can be combined with each other in a suitable manner.

[0052] It may be understood that in this disclosure, where the number of a component or part is not specifically defined, one or more of these components or parts could be present, and the term "several" here means "two or more". In the event that, as shown in the drawings and / or described in the description, a specific value, such as two, three, four, etc., is given for the number of a component or part, the specific value is generally exemplary and not limiting, and it can be interpreted as "several", namely two or more, which, however, does not mean that this disclosure excludes the case of only one component or part.

[0053] In this revelation, terms such as "assemble," "construct," "join," "connect," "be connected," "link," "couple," "adjoin," "communicate," "be in communication," "pass through," "fix," "fasten," etc., should be understood in a broad sense unless otherwise expressly stated or defined; for example, it could be direct or indirect. For instance, the term "connect" could refer to either a fixed connection or a detachable connection or an integral formation; it could refer to either a mechanical connection or an electrical connection; and it could refer to either a direct connection or an indirect connection through an intermediary, or to internal communication or a reciprocal relationship between two elements, unless otherwise expressly stated or defined.For example, the term "communicate / pass through" can refer to either direct communication / passing through or indirect communication / passing through an intermediary. For a person skilled in the art, the specific meanings of the above terms in this disclosure could be understood according to specific circumstances.

[0054] Unless otherwise expressly stated or defined, the expression "a component is arranged / mounted / located / received / placed in / within / inside another component" in this disclosure may mean either of the following two cases: that part or the majority of that component is located in that other component; and that that component is completely contained within that other component.

[0055] Although this disclosure is illustrated in detail by the embodiments described above, for the person skilled in the art this disclosure is naturally not limited to the embodiments illustrated in this description. Without deviating from the subject matter or scope of this disclosure defined by the claims, this disclosure can be modified and implemented as an amended embodiment. Therefore, the disclosure in this description serves only as an exemplary illustration and has no limiting effect on this disclosure.

Claims

[1] Electric toothbrush, characterized by , that it includes the following components: a holder (1) which is provided with a hollow section (13); a drive frame (2), wherein the drive frame (2) is elastically connected to the holder (1), the drive frame (2) is located in the hollow section (13), the drive frame (2) and the holder (1) are spaced apart from each other, and the drive frame (2) has a pin receiving element (21) for connection with a toothbrush head; and a motor (5) wherein the motor (5) is arranged in the drive frame (2) and the motor (5) functions to drive the drive frame (2) to oscillate or swing relative to the holder (1) so that the pin receiving element (21) is able to drive the toothbrush head to oscillate or swing. [2] Electric toothbrush according to claim 1, characterized by, that the drive frame (2) and the holder (1) are connected to each other via a connecting section (25) and an elastic section (24), the connecting section (25) is connected to the pin receiving element (21), and in a left / right direction (R) of the electric toothbrush, the elastic section (24) is located on the left and right side of the connecting section (25). [3] Electric toothbrush according to claim 2, characterized by , that the elastic section (24) is plate-shaped, and the thickness of the elastic section (24) along a forward / backward direction (F) of the electric toothbrush is greater than its thickness along the left / right direction (R) of the electric toothbrush. [4] Electric toothbrush according to claim 2 or 3, characterized by, that the electric toothbrush further comprises a pin (7) which projects from a front face of a main body (100) of the electric toothbrush in an upward / downward direction (A) and which serves to connect to the toothbrush head, wherein the pin receiving element (21) and the pin (7) are connected to each other, in the upward / downward direction (A) of the electric toothbrush, the elastic section (24) is located on the front of the motor (5), and the pin (7) is located on the front of the elastic section (24). [5] Electric toothbrush according to any one of claims 1 to 4, characterized by , that in a play between the drive frame (2) and the holder (1) a damping element (6) is provided, the damping element (6) has an elasticity, and when the drive frame (2) oscillates or swings, the damping element (6) is able to dampen a shock from the drive frame (2) to the holder (1). [6] Electric toothbrush according to claim 5, characterized by , that at least part of the damping element (6) is located on the left and right sides of the drive frame (2) in a left / right direction (R) of the electric toothbrush. [7] Electric toothbrush according to any one of claims 1 to 6, characterized by , that the drive frame (2) is connected to a counterweight (3). [8] Electric toothbrush according to claim 7, characterized by , that the output shaft of the motor (5) is connected to an eccentric weight (51); the drive frame (2) is enabled to oscillate or swing by the motor driving the eccentric weight (51) to rotate; and in an up / down direction (A) of a main body (100) of the electric toothbrush, the eccentric weight (51) is located on the underside of the motor (5), and the counterweight (3) is located on the top side of the motor (5). [9] Electric toothbrush according to any one of claims 1 to 8, characterized by , that a mounting hole for waterproof rings (15) is provided at the front end of the holder (1), and a waterproof ring (14) is fitted in the mounting hole for waterproof rings (15). [10] Electric toothbrush according to claim 2, characterized by , that the pin receiving element (21), the connecting section (25), the elastic section (24) and the holder (1) are designed as a single piece. [11] Electric toothbrush according to any one of claims 1 to 10, characterized by , that the material of the holder (1) and the material of the drive frame (2) each have a tensile strength of 90 to 260 MPa and a flexural modulus of 3500 to 8000 MPa.

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