Electric oral cleaning tool

Abstract

The electric oral cleaning device includes a housing (1), a transmission rod (2), and a brush head assembly (3), the brush head assembly (3) being movably connected to one end of the housing (1), a functional element (31) being provided on one side of the brush head assembly (3), a movable disc (32) being provided on the other side of the brush head assembly (3), the movable disc (32) being provided with a linking area, the linking area being provided off-center from the brush head assembly (3), the transmission rod (2) being provided inside the housing (1), the transmission rod (2) having an input end and an output end, the input end being connected to a transmission structure. the output end is coupled with the coupling region, and when the output end moves to a variable distance relative to the center of the movable disc (32), it can drive the coupling region to rotate together with the brush head assembly (3); the transmission rod (2) or at least the input end is integrally formed, the transmission rod (2) or at least the input end is made of a magnetizable material, and the output end is eccentric with respect to the longitudinal axis of the input end; the movable disc (32) is further provided with a limiting structure (33), which is used to axially limit the brush head assembly (3).

Description

Technical Field

[0001] The present invention relates to the technical field of toothbrushes, and particularly to electric oral cleaning tools.

Background Art

[0002] Electric toothbrushes are currently common oral cleaning tools, mainly divided into sonic toothbrushes and rotary toothbrushes. The sonic brush head mainly performs vibration cleaning by swinging the brush head left and right at a high frequency, and the rotary brush head mainly rotates the brush head left and right at a high frequency to clean efficiently, and the cleaning effect is better.

[0003] A commercially available general rotary electric toothbrush transmits power to the brush handle through a transmission structure that swings eccentrically left and right, and further transmits power from the brush handle to the brush head through a plurality of parts. Since it is necessary to assemble and cooperate a plurality of structures, not only does the difficulty of assembly and production increase, but the consistency of the swing amplitude of the brush head is likely to deteriorate. When used for a long time, the gap between parts becomes large, and noise increases and the swing amplitude attenuates, which has an adverse effect on the cleaning effect and the use experience.

Summary of the Invention

Problems to be Solved by the Invention

[0004] In view of the above, the present invention provides an electric oral cleaning tool in order to solve the problem that the conventional electric toothbrush has poor consistency and is likely to have an adverse effect on the cleaning effect and the use experience when used for a long time.

Means for Solving the Problems

[0005] In order to achieve one, some or all of the above objects, or other objects, the present application includes a housing, a transmission rod, and a brush head assembly. The brush head assembly is rotatably connected to one end of the housing, a functional element is provided on one side of the brush head assembly, a movable disc is provided on the other side of the brush head assembly, a linkage region is provided on the movable disc, and the linkage region is provided offset from the center of the brush head assembly. The transmission rod is provided within the housing, and the transmission rod has an input end and an output end, the output end is provided eccentrically with respect to the input end in the axial direction of the transmission rod, the input end is used to connect to the transmission structure, the output end is in conjunction with the linkage region, and when the output end reciprocates with respect to the center of the movable disk, it drives the linkage region to reciprocate and oscillate together with the brush head assembly, the variable diameter meaning that the distance from the output end to the center of the movable disk changes during the reciprocating motion. The transmission rod or at least the input end is integrally molded and provided. We propose an electric oral cleaning device in which the transmission rod or at least the input end is made of a magnetizable material.

[0006] Furthermore, the coordinating region is a groove, a guide rod is provided at the output end, the guide rod is located within the groove, and the distance from the guide rod to the center of the brush head assembly is between 2 mm and 4 mm.

[0007] Furthermore, the guide rod has a connecting block extending from the end away from the brush head assembly, a restricting groove is provided inside the housing, the connecting block is located within the restricting groove and is movable longitudinally within the restricting groove.

[0008] Furthermore, the connecting region is a fixed rod, and a connection hole is provided at the output end. The fixed rod is located within the connection hole, and when the connection hole moves vertically, the fixed rod moves horizontally within the connection hole.

[0009] Furthermore, the output terminal and the input terminal are connected by means of bending, welding, or assembly, and the projection of the output terminal is in the shape of an "L", a "T", or a groove.

[0010] Furthermore, the transmission rod or at least the input end is made of a plastic material mixed with magnetic powder.

[0011] Furthermore, a guide ring is fixed to the inner wall of the housing, and the transmission rod passes through the guide ring and is capable of reciprocating vertically within the guide ring.

[0012] Furthermore, the maximum reciprocating stroke of the transmission rod in the vertical direction is 1 to 5 mm, and the rotation angle of the brush head assembly is between -38° and 38°.

[0013] Furthermore, the magnetic attraction force at the output terminal is set to between 3.5N and 35N.

[0014] Furthermore, the shortest distance from the center point of the guide rod to the central axis of the input end is 1.5 to 4.5 mm. [Effects of the Invention]

[0015] The following beneficial effects are obtained when the embodiments of the present invention are implemented.

[0016] When employing the electric oral cleaning device according to the present invention, the transmission rod is integrally molded and, when it reciprocates vertically within the groove, it can drive and move the groove. Since the rotating shaft and limiting structure can restrict the movable disc, the movable disc can reciprocate and rotate only in a vertical plane, thereby driving the functional elements provided on the brush head assembly to rotate. Because the transmission structure transmits power to the movable disc via the transmission rod, the number of parts is small, energy loss during transmission is small, the impact on the overall transmission process due to large gaps between parts is relatively small, and noise and amplitude are not significantly affected even with prolonged use. [Brief explanation of the drawing]

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings necessary for use in the following description of the embodiments or the prior art will be briefly described below. However, the drawings in the following description are only some embodiments of the present invention, and it is obvious to those skilled in the art that other drawings can be obtained based on these drawings without creative labor. [Figure 1] It is a side view of an embodiment of the electric oral cleaning device proposed in the present application. [Figure 2] It is a cross-sectional view of the A-A cross-section in FIG. 1. [Figure 3] It is an enlarged view of part B in FIG. 2. [Figure 4] It is a cross-sectional view of another cross-section of an embodiment of the electric oral cleaning device proposed in the present application. [Figure 5] It is a schematic structural diagram when the housing is not shown in an embodiment of the electric oral cleaning device proposed in the present application. [Figure 6] It is a schematic diagram of the operating state when the housing is not shown in an embodiment of the electric oral cleaning device proposed in the present application. [Figure 7] It is a schematic structural diagram of the housing of another embodiment of the electric oral cleaning device proposed in the present application. [Figure 8] It is a schematic structural diagram when the housing is not shown in another embodiment of the electric oral cleaning device proposed in the present application. [Figure 9] It is a schematic structural diagram when the housing is not shown in yet another embodiment of the electric oral cleaning device proposed in the present application. [Figure 10] It is a schematic structural diagram of an embodiment of the electric oral cleaning device proposed in the present application. [Figure 11] It is a schematic diagram of the internal structure when the electric oral cleaning device proposed in the present application is assembled to the handle. [Figure 12] It is a cross-sectional view of the side when the electric oral cleaning device proposed in the present application is assembled to the handle. [Figure 13]The figure is a schematic view of the electric oral cleaner proposed in the present application in the state assembled to the handle and the state disassembled from the handle.

Embodiments for Carrying Out the Invention

[0018] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the art of the present application. The terms used in the specification of the present application are merely for the purpose of explaining specific embodiments and are not intended to limit the present application. The terms "comprising" and "having" and their variations in the specification, claims, and brief description of the drawings above are intended to cover non-exclusive inclusion. The terms such as "first", "second", etc. in the specification, claims, or the above drawings are for distinguishing different objects and are not for explaining a specific order.

[0019] As used herein, the term "example" means that a specific feature, structure, or characteristic described with reference to the example may be included in at least one example of the present application. This phrase appearing at various places in the specification does not necessarily refer to the same example, nor is it an independent or alternative example mutually exclusive with other examples. It is explicitly and implicitly understood by those skilled in the art that the examples described in this specification can be combined with other examples.

[0020] To better enable those skilled in the art to understand the aspects of the present application, the technical solutions in the examples of the present application will be clearly and completely described below with reference to the drawings.

[0021] Referring to FIGS. 1 to 6, the present application proposes an electric oral cleaner, which includes a housing 1, a transmission rod 2, and a brush head assembly 3. The brush head assembly 3 is rotatably connected to one end of the housing 1, and a functional element 31 is provided on one side of the brush head assembly 3. The functional element 31 may include multiple sets of bristles, as shown in Figure 1, or it may be another assembly such as a tongue cleaning device, such as the tongue cleaning brush head shown in Figure 10, or a soft rubber cleaning device. In the latter case, the electric oral cleaning device can be used as a tongue cleaning device. Specifically, a movable disc 32 is provided on the other side of the brush head assembly 3, and a linkage region is provided on the movable disc 32, which is offset from the center of the brush head assembly 3. The transmission rod 2 is provided within the housing 1 and has an input end and an output end. The input end of the transmission rod 2 is used to connect to the transmission structure and is cylindrical or substantially cylindrical, such as an elliptical cylinder, and extends into the cavity of the housing and at least the input end is integrally molded. The output end of the transmission rod 2 is the end closest to the brush head assembly 3, and includes a guide rod 21 or connection hole 22 that fits into the linkage area, and a connecting rod that connects the guide rod 21 or connection hole 22 to the input end. The shortest distance from the center point of the guide rod 21 to the central axis of the input end is 1.5 to 4.5 mm, and the distance from the guide rod 21 to the center of the brush head assembly 3 is between 2 mm and 4 mm. Furthermore, the output end and the input end may be integrally molded by a bending method, and based on this, a connecting block 211 may be connected to the output end by welding or riveting. The output end is provided eccentrically in the axial direction of the transmission rod 2 relative to the input end, the input end is used to connect to the transmission structure, and the output end is linked to the linkage region. When the output end reciprocates with a diameter variable relative to the center of the movable disk, it drives the linkage region to reciprocate and oscillate together with the brush head assembly 3. The above-mentioned diameter variable means that the distance from the output end to the center of the movable disk 32 changes during the reciprocating motion. The output end of the transmission rod 2 is connected to the linkage region in a manner that fits it, and when the output end reciprocates in the longitudinal direction, it drives the linkage region to rotate together with the brush head assembly 3.When the housing 1 is inserted into the toothbrush handle, the top end of the transmission structure provided inside the toothbrush handle is connected to the transmission rod 2 via magnetic attraction, driving the transmission rod 2 to reciprocate in the vertical direction. The transmission structure may be a conventional structure, but will not be described in detail here. The trajectory of the transmission rod 2 is perpendicular to the horizontal line, so that the output end moves at a variable distance from the center of the movable disk; in other words, the distance from the output end to the center of the movable disk is constantly changing during motion. The lower end of the transmission rod 2 is close to the transmission structure and is provided axially symmetric with respect to the vertical central axis of the brush head assembly 3, and the upper end of the transmission rod 2 is gradually shifted to one side. In this embodiment, the connecting region is an elliptical groove 321, and a guide rod 21 is provided at the upper end of the transmission rod 2. That is, the projection of one side of the transmission rod 2 resembles the shape of a "7". The guide rod 21 is located within the groove 321, and when the guide rod 21 reciprocates vertically together with the transmission rod 2, the guide rod 21 drives the groove 321 to rotate. The elliptical groove 321 provides sufficient space for the movement of the guide rod 21, and the vertical movement of the guide rod 21 rotates the groove 321 around the center point of the brush head assembly 3, causing the brush head assembly 3 to rotate together with the groove 321, the direction of which is indicated by the arrow in Figure 6. Taking the direction shown in Figure 6 as an example, when the transmission rod 2 moves upward, the brush head assembly 3 rotates to the right, and when the transmission rod 2 moves downward, the brush head assembly 3 rotates to the left. The transmission structure drives the transmission rod 2 to move up and down at high frequency, and the brush head assembly 3 also rotates left and right at high speed along with it, thereby driving the functional element 31 on the other side of the brush head assembly 3 to rotate at high speed. Taking a toothbrush as an example, this can be used to clean teeth. Furthermore, the above-mentioned brush head assembly 3 is rotatably connected to one end of the housing 1. Specifically, a rotating shaft 34 is inserted into a movable disc 32, the rotating shaft 34 is located at the center of the brush head assembly 3, one end of the rotating shaft 34 abuts against the housing 1, and the rotating shaft 34 is fixed inside the movable disc 32 by assembly, and the movable disc 32 drives the brush head assembly 3 to rotate both sides around the rotating shaft 34.A restricting structure 33 is provided on the movable disc 32, and the restricting structure 33 is used to restrict the brush head assembly 3 in the axial direction. As shown in Figure 4, the movable disc 32 is provided with a housing groove 322 that opens in the vertical direction, and a vertical through hole is made in the housing 1, and the restricting structure 33 is inserted into the housing groove 322 from the through hole and abuts against the side wall of the housing groove 322, and the housing groove 322 is rotatable relative to the restricting structure 33. The rotation axis 34 prevents the movable disc 32 from moving in the horizontal or vertical direction, and the restricting structure 33 prevents the movable disc 32 from moving along the extension direction of the rotation axis 34, so the movable disc 32 rotates only in the circumferential direction. In this embodiment, the restricting structure 33 is a restricting pin.

[0022] In another embodiment, as shown in Figure 9, the coordinating region is a fixed rod 35 provided on the movable disk. The fixed rod 35 is eccentrically positioned and has a connection hole 22 at its output end. The fixed rod 35 is located within the connection hole 22, which is also elliptical in shape. When the connection hole 22 moves vertically, the fixed rod 35 moves laterally within the connection hole 22. Its operating principle is similar to that of the above embodiment and will not be described in detail here.

[0023] In this embodiment, the orthographic projection of the movable disc 32 consists of two bow shapes sharing one string. The distance from the center point of the groove 321 to the center point of the brush head assembly 3 is equal to the distance from the center point of the brush head assembly 3 to the other edge of the movable disc 32. However, the former distance may be slightly greater than the latter distance. The greater the former distance, the more the side wall of the groove 321 receives an upward force when the guide rod 21 moves upward. This increases the torque of this force, reducing the force required to rotate the movable disc 32 and thus saving labor. Furthermore, considering the size of the housing 1 and the stability of the transmission, it is preferable that the former distance and the latter distance are equal.

[0024] In another embodiment, as shown in Figures 7 and 8, a connecting block 211 extends from the end of the guide rod 21 away from the brush head assembly 3, and a restricting groove 12 is provided inside the housing 1, where the connecting block 211 is located and is movable longitudinally within the restricting groove 12. The restricting groove 12 restricts the connecting block 211, making the transmission rod 2 less prone to swaying, and the distance from the rotation axis 34 to the vertical line on which the motion trajectory of the guide rod 21 exists remains constant. In this process, the distance between the guide rod 21 and the rotation axis 34 is variable, and the maximum longitudinal stroke of the transmission rod 2 is 1 to 5 mm. Preferably, the maximum stroke is 1.5 mm to 3.5 mm, at which point the rotation angle of the brush head assembly 3 is between -38° and 38°, allowing for thorough cleaning of the teeth.

[0025] Furthermore, a guide ring 13 is fixed to the inner wall of the housing 1, and the transmission rod 2 passes through the guide ring 13 and is capable of reciprocating vertically within the guide ring 13. The guide ring 13 plays a role in guiding and restricting the transmission rod 2, preventing it from shifting during movement. In this embodiment, symmetrical engagement blocks are provided on the outer wall of the guide ring 13, and symmetrical engagement grooves are provided at corresponding positions on the inner wall of the housing 1, with the engagement blocks and engagement grooves fitting together. When engaged, the position of the guide ring 13 is fixed and does not move due to the movement of the transmission rod 2. Since the inner diameter of the guide ring 13 and the outer diameter of the input end of the transmission rod 2 match, friction is relatively small, wear during transmission is relatively small, and deflection of the transmission rod 2 that would adversely affect its use can be avoided.

[0026] In this embodiment, the transmission rod 2 is integrally molded. The end of the transmission rod 2 away from the brush head assembly 3 has a horizontal end face and can be adapted to a general transmission structure. At least the input end of the transmission rod 2 is made of a magnetizable metallic material. In another embodiment, at least the input end of the transmission rod 2 is made of a plastic material mixed with magnetic powder. That is, the input end of the transmission rod 2 can be connected to and fixed to the output end of the transmission structure via magnetic attraction. Referring to Figure 11, a handle 4 is provided for use in combination with the electric oral cleaning device. The handle 4 is connected to the lower end of the housing 1, and a transmission mechanism 5 and a motor 6 are provided inside the handle 4. The output terminal of the motor 6 is connected to the proximal end of the transmission mechanism 5. A battery 7 is further provided inside the handle 4, and the battery 7 is located at the lower end of the motor 4 and is electrically connected to the motor 4. Specifically, the transmission mechanism 5 includes a drive gear 51, a driven gear 52, and a transmission rod 53. The drive gear 51 is fitted onto the output shaft of the motor 6 and rotates together with the output shaft of the motor 6. The motor 6 is fixedly connected to the inner wall of the handle 4, and the output shaft of the motor 6 is provided in the same direction as the handle 4, specifically, upward along the longitudinal direction of the handle 4. The drive gear 51 is connected to the output shaft of the motor 6 so as to be horizontally rotatable. The driven gear 52 is a bevel gear, and the driven gear 52 and the drive gear 51 are perpendicular to each other. When the driven gear 52 and the drive gear 51 mesh, horizontal rotation is converted into vertical rotation. The transmission rod 53 is transmittedly connected to the driven gear 52. The motor 6 drives the drive gear 51 to rotate horizontally and also drives the driven gear 52 to rotate vertically. Subsequently, the driven gear 52 drives the transmission rod 53 to reciprocate up and down. Specifically, a sleeve 54 is provided at the lower end of the transmission rod 53, an eccentric column 55 is provided on the driven gear 52, the sleeve 54 is fitted onto the eccentric column 55, a lateral pivot shaft 56 is provided on the driven gear 52, the pivot shaft 56 passes through the eccentric column 55 along its axial direction and through the bottom of the sleeve 54, both ends of the pivot shaft 56 are rotatably connected to the inner wall of the handle 4, and the driven gear 52 is rotatably supported, the driven gear 52 drives the eccentric column 55 to rotate around the pivot shaft 56, the sleeve 54 swings up and down in accordance with the rotation of the eccentric column 55 and can further drive the entire transmission rod 53 to reciprocate up and down. A magnetic connector 57 is provided at the upper end of the transmission rod 53 for connecting to the transmission rod 2 by magnetic attraction, and since the proximal end of the transmission rod 2 is made of a magnetizable material, the transmission rod 53 can ultimately drive the functional element 31 to oscillate and clean the user's mouth. The transmission mechanism 5 has a magnetic connection part, and the two magnetic attractive forces between the proximal end of the transmission rod 2 and the magnetic connection part are set to between 3.5N and 35N, preferably between 3.5N and 20N, for example, 15N. When the magnetic attractive force is set to 15N, firstly, with a connection strength of 15N, the toothbrush will not detach during vibration. Secondly, it can be easily removed when used by an adult, and when a child wants to replace the toothbrush head, it can be removed by pulling it with all their might. More specifically, as shown in Figures 12 and 13, Figures 12 and 13 show the state when the brush head and brush handle are connected, that is, when the brush head and brush handle are connected, there is the connection force of the brush head to the engagement part of the body of the brush handle, and the two magnetic attractive forces between the proximal end and the magnetic connection part. JPEG0007870592000001.jpg79170 JPEG0007870592000002.jpg73170 JPEG0007870592000003.jpg59170 From the above test data, it was found that the average insertion / extraction force at the engaging portion was approximately 7-8 N, and the individual magnetic attraction force was approximately 9-15 N. This data mainly reflects the insertion / extraction force at the engaging portion. JPEG0007870592000004.jpg99170 JPEG0007870592000005.jpg59170 From the results in Tables 1 to 5 above, the insertion / removal force at the engagement part itself is 7-8N. Subtracting this engagement force, the maximum force permissible for adults is basically within 35N and for children it is within 20N. In other words, 20N is the optimal force for both adults and children that allows for the normal replacement of the toothbrush head while maintaining high connection strength.

[0027] Clearly, the embodiments described above represent only a selection of the embodiments of the Application, not all embodiments, and while the drawings show preferred embodiments of the Application, they do not limit the scope of the claims. The Application can be implemented in many different forms, but conversely, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosures of the Application. Although the Application has been described in detail with reference to the embodiments described above, those skilled in the art can modify the technical solutions described in each of the specific embodiments described above, or replace some of their technical features with equivalents. Equivalent structures created using the contents of the specification and drawings of the Application will also be included within the scope of the claims of the Application, whether applied directly or indirectly to other relevant technical fields. [Explanation of symbols]

[0028] 1 Housing 12 limiting grooves 13 Guide Rings 2. Transmission Rod 21 Guide Rods 211 Connection Blocks 22 connection holes 3. Brush head assembly 31 Functional Elements 32 movable discs 321 Recessed groove 322 Storage groove 33 Restrictive Structure 34 Rotation axis 35 Fixed Rod 4 handles 5. Transmission mechanism 51 Drive gear 52 Driven gear 53 Transmission Rod 54 sleeves 55 Eccentric column 56 Rotary shafts 57 Magnetic connection section 6 motors 7. Storage Battery

Claims

1. An electric oral cleaning device comprising a housing, a transmission rod, and a brush head assembly, The brush head assembly is rotatably connected to one end of the housing, a functional element is provided on one side of the brush head assembly, a movable disc is provided on the other side of the brush head assembly, a linkage region is provided on the movable disc, and the linkage region is provided offset from the center of the brush head assembly. The transmission rod is provided within the housing and has an input end and an output end, the output end being provided eccentrically with respect to the input end in the axial direction of the transmission rod, the input end being used to connect to the transmission structure, the output end being in conjunction with the linkage region, the output end moving such that the distance from the output end to the center of the movable disk changes during the reciprocating motion in conjunction with the longitudinal reciprocating motion of the transmission rod, and the movable disk is rotationally driven through the linkage region to reciprocate and oscillate together with the brush head assembly. The transmission rod or at least the input end is integrally molded and provided. The transmission rod or at least the input end is made of a magnetizable material. The aforementioned cooperating region is a groove, a guide rod is provided at the output end, the guide rod is located within the groove, and the distance from the guide rod to the center of the brush head assembly is between 2 mm and 4 mm. The guide rod has a connecting block extending from the end away from the brush head assembly, a restricting groove is provided inside the housing, the connecting block is located within the restricting groove and is movable longitudinally within the restricting groove. An electric oral cleaning device characterized by the following features.

2. The electric oral cleaning device according to claim 1, characterized in that the connecting region is a fixed rod, a connection hole is provided at the output end, the fixed rod is located within the connection hole, and when the connection hole moves in the vertical direction, the fixed rod moves laterally within the connection hole.

3. The electric oral cleaning device according to claim 1, characterized in that the output terminal and the input terminal are connected by means of bending, welding, or assembly, and the projection of the output terminal is in the shape of an "L", a "T", or a groove.

4. The electric oral cleaning device according to claim 1, characterized in that the transmission rod or at least the input end is made of a plastic material mixed with magnetic powder.

5. The electric oral cleaning device according to claim 1, characterized in that a guide ring is fixed to the inner wall of the housing, and the transmission rod passes through the guide ring and is capable of reciprocating vertically within the guide ring.

6. The electric oral cleaning device according to claim 1, characterized in that the maximum reciprocating stroke of the transmission rod in the vertical direction is 1 to 5 mm, and the rotation angle of the brush head assembly is between -38° and 38°.

7. The electric oral cleaning device according to claim 1, characterized in that the magnetic attraction force of the output terminal is set between 3.5 N and 35 N.

8. The electric oral cleaning device according to claim 1, characterized in that the shortest distance from the center point of the guide rod to the central axis of the input end is 1.5 to 4.5 mm.

9. An electric toothbrush comprising the electric oral cleaning device described in claim 1.

10. An electric oral cleaning device comprising a housing, a transmission rod, and a brush head assembly, The brush head assembly is rotatably connected to one end of the housing, a functional element is provided on one side of the brush head assembly, a movable disc is provided on the other side of the brush head assembly, a linkage region is provided on the movable disc, and the linkage region is provided offset from the center of the brush head assembly. The transmission rod is provided within the housing and has an input end and an output end, the output end being provided eccentrically with respect to the input end in the axial direction of the transmission rod, the input end being used to connect to the transmission structure, the output end being in conjunction with the linkage region, the output end moving such that the distance from the output end to the center of the movable disk changes during the reciprocating motion in conjunction with the longitudinal reciprocating motion of the transmission rod, and the movable disk is rotationally driven through the linkage region to reciprocate and oscillate together with the brush head assembly. The transmission rod or at least the input end is integrally molded and provided. The transmission rod or at least the input end is made of a magnetizable material. The aforementioned linkage region is a fixed rod, a connection hole is provided at the output end, the fixed rod is located within the connection hole, and when the connection hole moves in the vertical direction, the fixed rod moves laterally within the connection hole, characterized in that the electric oral cleaning device.

11. An electric oral cleaning device comprising a housing, a transmission rod, and a brush head assembly, The brush head assembly is rotatably connected to one end of the housing, a functional element is provided on one side of the brush head assembly, a movable disc is provided on the other side of the brush head assembly, a linkage region is provided on the movable disc, and the linkage region is provided offset from the center of the brush head assembly. The transmission rod is provided within the housing and has an input end and an output end, the output end being provided eccentrically with respect to the input end in the axial direction of the transmission rod, the input end being used to connect to the transmission structure, the output end being in conjunction with the linkage region, the output end moving such that the distance from the output end to the center of the movable disk changes during the reciprocating motion in conjunction with the longitudinal reciprocating motion of the transmission rod, and the movable disk is rotationally driven through the linkage region to reciprocate and oscillate together with the brush head assembly. The transmission rod or at least the input end is integrally molded and provided. An electric oral cleaning device characterized in that the transmission rod or at least the input end is made of a plastic material mixed with magnetic powder.

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