Electric toothbrush

Abstract

The utility model discloses an electric toothbrush, which comprises a handle cylinder, a toothbrush head, a toothbrush handle and a toothbrush head, the motor is arranged in the handle cylinder, the motor comprises a motor shaft, and at least one part of the motor shaft extends out of the handle cylinder to be matched with an electronic brush head of the electric toothbrush; the motor shaft is sleeved with the insulation sleeve; the electronic brush head comprises an insulating sleeve, a main control board and a plurality of first electric connecting pieces, the insulating sleeve is arranged in the main control board, the first electric connecting pieces are arranged on the insulating sleeve at intervals, the first electric connecting pieces are electrically connected with the main control board, the first electric connecting pieces are suitable for being inserted into the electronic brush head, and the first electric connecting pieces are used for being electrically connected with second electric connecting pieces in the electronic brush head. According to the electric toothbrush designed by the utility model, the insulating sleeve is arranged at the electric joint of the upper part and the lower part, so that the risk of short circuit is reduced.

Description

Technical Field

[0001] The utility model relates to the field of oral cleaning equipment, in particular to an electric toothbrush. Background Art

[0002] An electric toothbrush generally consists of an upper structure and a lower structure connected to each other, wherein the upper structure includes a brush head and the lower structure includes a motor.

[0003] Since electric toothbrushes are used in a wet and humid environment, water ingress and short circuit may easily occur at the connection between the lower structure and the brush head. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide an electric toothbrush. The electric toothbrush designed according to the utility model is provided with an insulating sleeve at the electrical connection between the upper and lower parts of the structure to reduce the risk of short circuit.

[0005] The utility model also provides an electric toothbrush having the above-mentioned electric toothbrush.

[0006] According to the utility model, the electric toothbrush includes: a handle barrel, in which a main control board is arranged; a motor, which is arranged in the handle barrel, and the motor includes a motor shaft, at least a part of which extends out of the handle barrel to cooperate with the electronic brush head of the electric toothbrush; an insulating sleeve, which is sleeved on the motor shaft; and a plurality of first electrical connectors, which are arranged in the insulating sleeve at intervals, the first electrical connectors are electrically connected to the main control board, the first electrical connectors are suitable for being inserted into the electronic brush head, and the first electrical connectors are used to be electrically connected to the second electrical connector in the electronic brush head.

[0007] According to the electric toothbrush of the utility model, an insulating sleeve is provided at the electrical connection of the upper and lower parts of the structure to reduce the risk of short circuit. The insulating sleeve is applied to the motor shaft to increase the radius of the motor shaft end structure, thereby increasing the distance between adjacent first electrical connectors and reducing the possibility of short circuit. In addition, the insulating sleeve can fill the gap between the motor shaft and the matching space to reduce the probability of water entering the matching space and contacting the first electrical connector or the second electrical connector, thereby improving the working reliability of the electric toothbrush.

[0008] According to some embodiments of the present invention, the plurality of first electrical connectors are disposed near an end of the insulating sleeve away from the handle tube.

[0009] According to some embodiments of the present invention, the outer peripheral wall of the insulating sleeve is provided with a first plane, and the plurality of first electrical connectors are provided on the first plane.

[0010] According to some embodiments of the present invention, the outer peripheral wall of the insulating sleeve is further provided with a second plane, and in the radial direction of the motor shaft, one of the first plane and the second plane is located outside the other to form a step portion.

[0011] According to some embodiments of the present invention, in the radial direction of the motor shaft, the first plane is located radially inside the second plane.

[0012] According to some embodiments of the present invention, in the axial direction of the motor shaft, the length of the second plane is greater than the length of the first plane.

[0013] According to some embodiments of the utility model, the insulating sleeve and the motor shaft are interference fit; or a fixed adhesive layer is provided between the insulating sleeve and the motor shaft.

[0014] According to some embodiments of the utility model, a sealing ring is provided on the outer peripheral wall of the insulating sleeve, and the sealing ring is sealed with the electronic brush head.

[0015] According to some embodiments of the present invention, the sealing ring is arranged at the end of the insulating sleeve.

[0016] According to some embodiments of the utility model, the electric toothbrush further comprises a circuit board, wherein the circuit board is disposed in the insulating sleeve, a plurality of first electrical connectors are contact points disposed on the circuit board, and the circuit board is wire-connected to the main control board.

[0017] According to some embodiments of the present invention, the motor shaft is a hollow part to define a wiring space, and the electric toothbrush also includes a conductive component for connecting the main control board and the circuit board, and at least a portion of the conductive component is located in the wiring space.

[0018] According to some embodiments of the utility model, the conductive component is fixedly connected to the circuit board, and the connection between the conductive component and the circuit board is covered with an insulating adhesive layer, and / or the conductive component is fixedly connected to the main control board, and the connection between the conductive component and the main control board is covered with an insulating adhesive layer.

[0019] According to some embodiments of the utility model, the conductive component includes a conductive wire, one end of which is electrically connected to the circuit board and the other end of which extends out of the wiring space to be electrically connected to the main control board, and the length of the conductive wire extending out of the wiring space is greater than the distance between the end of the motor shaft and the main control board.

[0020] According to some embodiments of the utility model, the conductive component includes a conductive wire and a contact member, one end of the conductive wire is electrically connected to the circuit board, the other end of the conductive wire is electrically connected to the contact member, and the contact member is in sliding contact and conductive connection with the main control board.

[0021] To sum up, according to the utility model, an insulating sleeve is provided on the outside of the motor shaft of the electric toothbrush to reduce the risk of short circuit at the electrical connection between the upper and lower parts of the structure. The insulating sleeve can increase the radius of the motor shaft end structure, thereby increasing the distance between adjacent first electrical connectors, further reducing the possibility of short circuit and improving the working reliability of the electric toothbrush.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 It is an overall structural diagram of an electric toothbrush according to an embodiment of the utility model.

[0025] Figure 2 It is a cross-sectional view of an electric toothbrush according to an embodiment of the utility model.

[0026] Figure 3 It is a cross-sectional view of an electronic brush head according to an embodiment of the utility model.

[0027] Figure 4 It is a structural diagram of the motor shaft end according to an embodiment of the utility model.

[0028] Figure 5 yes Figure 4 sectional view of .

[0029] Figure 6 It is a structural diagram of an insulating sleeve according to an embodiment of the utility model.

[0030] Reference numerals:

[0031] 1000. Electric toothbrush;

[0032] 100, handle tube; 110, main control board;

[0033] 200, motor; 210, motor shaft;

[0034] 300, insulating sleeve; 310, first plane; 320, second plane; 330, slot; 340, step portion;

[0035] 400, electronic brush head; 400a, matching space;

[0036] 500, a first electrical connector;

[0037] 600, sealing ring;

[0038] 700. Circuit board. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] An electric toothbrush generally consists of an upper structure and a lower structure connected to each other, wherein the upper structure includes a brush head and the lower structure includes a motor. Since electric toothbrushes are used in a watery and humid environment, water easily enters the connection between the lower structure and the brush head, causing a short circuit.

[0045] Reference below Figure 1-Figure 6 An electric toothbrush 1000 according to an embodiment of the present invention is described.

[0046] like Figure 1-Figure 6 As shown, the electric toothbrush 1000 according to the utility model includes: a handle barrel 100, a motor 200, an insulating sleeve 300 and a plurality of first electrical connectors 500, wherein a main control board 110 is provided in the handle barrel 100; the motor 200 is provided in the handle barrel 100, and the motor 200 includes a motor shaft 210, and at least a portion of the motor shaft 210 extends out of the handle barrel 100 to cooperate with the electronic brush head 400 of the electric toothbrush 1000; the insulating sleeve 300 is externally mounted on the motor shaft 210; a plurality of first electrical connectors 500 are spaced apart in the insulating sleeve 300, the first electrical connector 500 is electrically connected to the main control board 110, the first electrical connector 500 is suitable for being inserted into the electronic brush head 400, and the first electrical connector 500 is used to be electrically connected to the second electrical connector in the electronic brush head 400. Specifically, the electric toothbrush 1000 includes an upper structure and a lower structure that are detachably connected, wherein the upper structure includes an electronic brush head 400, and the lower structure includes a handle tube 100. The motor shaft 210 of the motor 200 extends out of the handle tube 100 to cooperate with the electronic brush head 400. When the motor 200 is working, it can drive the electronic brush head 400 to move.

[0047] In some embodiments, Figure 3 As shown, the electronic brush head 400 is formed with a matching space 400a to accommodate the motor shaft 210 of the motor 200, and the motor shaft 210 extends into the matching space 400a to achieve the connection between the electronic brush head 400 and the motor shaft 210, thereby achieving the connection between the electronic brush head 400 and the handle tube 100.

[0048] In some embodiments, the electric toothbrush 1000 further includes a power supply, which is disposed in the handle tube 100 and is suitable for supplying power to various power-consuming structures of the electric toothbrush 1000 .

[0049] The insulating sleeve 300 is placed on the motor shaft 210, and the first electrical connector 500 is fixed to the insulating sleeve 300. It can be understood that since the motor shaft 210 is relatively thin, the insulating sleeve 300 is placed on the motor shaft 210, which can increase the installation area for installing the first electrical connector 500 or other structures, ensure the structural strength of the motor shaft 210, and improve the installation stability of the first electrical connector 500 on the motor shaft 210. In addition, since the motor shaft 210 has a relatively small rod diameter, the insulating sleeve 300 placed outside the motor shaft 210 can increase the radius of the end structure of the motor shaft 210, thereby increasing the distance between adjacent first electrical connectors 500 and reducing the possibility of short circuit. In addition, the insulating sleeve 300 is constructed of an insulating material, and multiple first electrical connectors 500 are arranged on the insulating sleeve 300 at intervals and are electrically connected to the power supply. After the insulating sleeve 300 extends into the matching space 400a, the first electrical connector 500 is electrically connected to the second electrical connector in the electronic brush head 400. After the lower structure of the electric toothbrush 1000 is matched with the electronic brush head 400, the lower structure of the electric toothbrush 1000 is electrically connected to the electronic brush head 400 only through the first electrical connector 500, thereby avoiding a short circuit and ensuring that the electric toothbrush 1000 works normally.

[0050] According to the electric toothbrush 1000 of the present invention, an insulating sleeve 300 is provided at the electrical connection between the upper and lower parts of the structure to reduce the risk of short circuit. The insulating sleeve 300 is externally mounted on the motor shaft 210, which can increase the radius of the end structure of the motor shaft 210, thereby increasing the distance between adjacent first electrical connectors 500 and reducing the possibility of short circuit. In addition, the insulating sleeve 300 can fill the gap between the motor shaft 210 and the matching space 400a, reducing the probability of water entering the matching space 400a and contacting the first electrical connector 500 or the second electrical connector, thereby improving the working reliability of the electric toothbrush 1000.

[0051] According to some embodiments of the present invention, Figure 4 As shown, multiple first electrical connectors 500 are arranged near the end of the insulating sleeve 300 away from the handle tube 100. At this time, the first electrical connector 500 is closer to the free end of the insulating sleeve 300 away from the handle tube 100, so that the end of the motor shaft 210 can penetrate deeper into the matching space 400a, making the electrical connection position of the upper and lower parts of the electric toothbrush 1000 deeper, which can more effectively reduce the probability of water entering the matching space 400a and contacting the first electrical connector 500 or the second electrical connector, avoiding water short circuit of the electric toothbrush 1000, and improving the working reliability of the electric toothbrush 1000.

[0052] According to some embodiments of the present invention, Figure 6 As shown, the outer peripheral wall of the insulating sleeve 300 is provided with a first plane 310, and a plurality of first electrical connectors 500 are provided on the first plane 310. In some embodiments, the insulating sleeve 300 is cylindrical as a whole and is sleeved on the end of the motor shaft 210, and the first plane 310 provided with a plurality of first electrical connectors 500 is configured as a plane to improve the stability of the electrical connection.

[0053] In some embodiments, after the insulating sleeve 300 extends into the mating space 400a, the portion of the insulating sleeve 300 provided with the first plane 310 can stop against the internal structure of the mating space 400a to prevent the insulating sleeve 300 from rotating relative to the electronic brush head 400, thereby preventing poor contact between the first electrical connector 500 and the second electrical connector, and ensuring that the electric toothbrush 1000 can work normally.

[0054] According to some embodiments of the present invention, Figure 6 As shown, the outer peripheral wall of the insulating sleeve 300 is further provided with a second plane 320. In the radial direction of the motor shaft 210, one of the first plane 310 and the second plane 320 is located outside the other to form a step portion 340. Specifically, the second plane 320 provided on the insulating sleeve 300 is also configured as a plane, and a step portion 340 is formed between the first plane 310 and the second plane 320, which can extend the mating surface that stops against the internal structure of the mating space 400a, thereby improving the connection stability of the upper and lower structures of the electric toothbrush 1000.

[0055] According to some embodiments of the present invention, Figure 6 As shown, in the radial direction of the motor shaft 210, the first plane 310 is located radially inside the second plane 320, so that the first electrical connector 500 is located in a non-coplanar position of the second plane 320, so as to avoid water flowing toward the first plane 310 along the gap between the second plane 320 and the inner wall of the mating space 400a due to capillary phenomenon, thereby improving the anti-water ingress effect.

[0056] According to some embodiments of the present invention, Figure 6 As shown, in the axial direction of the motor shaft 210, the length of the second plane 320 is greater than that of the first plane 310. At this time, the second plane 320 can share more limiting bearing force than the first plane 310, reduce the uneven force on the first plane 310, ensure the planar shape of the first plane 310, and thus ensure the stability of the electrical connection.

[0057] According to some embodiments of the present invention, the insulating sleeve 300 and the motor shaft 210 are interference fit; or a fixed adhesive layer is provided between the insulating sleeve 300 and the motor shaft 210 .

[0058] In some embodiments, the insulating sleeve 300 and the motor shaft 210 are interference fit, and the insulating sleeve 300 may be a flexible member.

[0059] In other embodiments, the insulating sleeve 300 is outermostly arranged on the motor shaft 210, a first matching portion is provided on the motor shaft 210, and a second matching portion is provided on the insulating sleeve 300, and the first matching portion cooperates with the second matching portion to limit the insulating sleeve 300 from moving axially or rotating circumferentially relative to the motor shaft 210, wherein the first matching portion and the second matching portion can be constructed as a fixed adhesive layer arranged between the insulating sleeve 300 and the motor shaft 210 to bond the insulating sleeve 300 and the motor shaft 210; or the first matching portion can be constructed as a snap-fit ​​protrusion, and the second matching portion can be constructed as a snap-fit ​​groove 330, and the first matching portion and the second matching portion are snap-fitted to fix the insulating sleeve 300 to the motor shaft 210.

[0060] Of course, the insulating sleeve 300 and the motor shaft 210 may also be matched in other ways to ensure that the insulating sleeve 300 and the motor shaft 210 are fixedly connected.

[0061] In some embodiments, a flat position is provided on the motor shaft 210, and a flat position matching portion suitable for matching with the flat position is provided on the insulating sleeve 300. After the insulating sleeve 300 is sleeved on the motor shaft 210, the flat position matching portion matches with the flat position to limit the circumferential rotation of the insulating sleeve 300 relative to the motor shaft 210.

[0062] In some embodiments, to prevent the electronic brush head 400 from pulling down the insulating sleeve 300 when plugging and unplugging the electronic brush head 400 , glue is applied between the insulating sleeve 300 and the motor shaft 210 to improve the connection stability between the insulating sleeve 300 and the motor shaft 210 .

[0063] According to some embodiments of the present invention, Figure 5 As shown, the outer peripheral wall of the insulating sleeve 300 is provided with a sealing ring 600, and the sealing ring 600 is sealed and matched with the electronic brush head 400. Specifically, after the upper and lower parts of the electric toothbrush 1000 are matched, the insulating sleeve 300 can fill the gap between the motor shaft 210 and the matching space 400a, reducing the probability of water entering the matching space 400a and contacting the first electrical connector 500 or the second electrical connector. The sealing ring 600 can further reduce the probability of water entering the matching space 400a, reduce the possibility of short circuit, and improve the working reliability of the electric toothbrush 1000.

[0064] According to some embodiments of the present invention, Figure 5 As shown, the sealing ring 600 is arranged at the end of the insulating sleeve 300 to seal the gap between the insulating sleeve 300 and the opening of the matching space 400a after the upper and lower parts of the electric toothbrush 1000 are matched.

[0065] According to some embodiments of the present invention, Figure 5 As shown, the electric toothbrush 1000 further includes a circuit board 700, which is disposed in the insulating sleeve 300, and a plurality of first electrical connectors 500 are contact points disposed on the circuit board 700, and the circuit board 700 is connected to the main control board 110. Specifically, the power supply is electrically connected to the circuit board 700 to supply power to the circuit board 700, the insulating sleeve 300 is sleeved on the end of the motor shaft 210 extending out of the handle tube 100, and the portion of the circuit board 700 provided with the first electrical connector 500 is exposed from the insulating sleeve 300, so as to be electrically connected to the second electrical connector of the electronic brush head 400 when the end of the motor shaft 210 extending out of the handle tube 100 is matched with the electronic brush head 400. Since the insulating sleeve 300 is constructed of an insulating material, after the lower part structure of the electric toothbrush 1000 is matched with the electronic brush head 400, the lower part structure of the electric toothbrush 1000 is electrically connected to the electronic brush head 400 only through the electrical connection part on the circuit board 700, thereby avoiding short circuit and ensuring the normal operation of the electric toothbrush 1000.

[0066] According to some embodiments of the utility model, the motor shaft 210 is a hollow part to define a wiring space, and the electric toothbrush 1000 also includes a conductive component for connecting the main control board 110 and the circuit board 700, and at least a portion of the conductive component is located in the wiring space. Specifically, the motor shaft 210 is a hollow part to define a wiring space inside the motor shaft 210. When the electric functional component is exposed to the motor shaft 210, it can be constructed as an electrical connection part, and the conductive component suitable for conducting electricity can be arranged in the wiring space, and one end of the conductive component is electrically connected to the electrical connection part, and the other end of the conductive component can be electrically connected to the main control board 110. When the motor shaft 210 cooperates with the electronic brush head 400, the conductive component can be electrically connected to the electronic brush head 400 through the electrical connection part to drive the electronic brush head 400 to move; when the electric functional component is constructed as an electric functional part, the conductive component in the wiring space can be electrically connected to the electric functional part, and the main control board 110 controls the movement of the electric functional part to drive the electronic brush head 400 to move.

[0067] According to some embodiments of the utility model, the conductive component is fixedly connected to the circuit board 700, and the connection between the conductive component and the circuit board 700 is covered with an insulating rubber layer, and / or the conductive component is fixedly connected to the main control board 110, and the connection between the conductive component and the main control board 110 is covered with an insulating rubber layer. Specifically, an insulating rubber layer can be provided at the connection between the conductive component and the electric functional component for reinforcement treatment to avoid the connection between the conductive component and the electric functional component being broken when the motor shaft 210 drives the conductive component to move together, thereby ensuring the connection strength between the conductive component and the electric functional component; an insulating rubber layer can also be provided between the end of the conductive component electrically connected to the main control board 110 and the main control board 110 for reinforcement treatment to avoid the connection between the conductive component and the circuit board 700 being broken when the motor shaft 210 drives the conductive component to move together, thereby ensuring the connection strength between the conductive component and the circuit board 700.

[0068] It can be understood that the insulating design of the insulating rubber layer can ensure that the current between the conductive component and the electrical functional component or the main control board 110 is only transmitted at the connection point, avoiding contact between the conductive component and the electrical functional component or other positions of the main control board 110, thereby avoiding short circuit.

[0069] At the same time, by applying an insulating glue layer at the connection between the conductive component and the electrical functional component or at the connection between the conductive component and the main control board 110, the conductive component can be connected to the electrical functional component or to the main control board 110, which is convenient to operate and easy to implement.

[0070] According to some embodiments of the utility model, the conductive component includes a conductive wire, one end of which is electrically connected to the circuit board 700 and the other end of which extends out of the wiring space to be electrically connected to the main control board 110, and the length of the conductive wire extending out of the wiring space is greater than the distance between the end of the motor shaft 210 and the main control board 110. Specifically, one end of the motor shaft 210 is suitable for extending out of the handle tube 100 and is provided with an electric function component, the conductive wire is arranged in the wiring space inside the motor shaft 210, and one end of the conductive wire is electrically connected to the electric function component, and the other end of the conductive wire extends out of the wiring space of the motor shaft 210 and is electrically connected to the main control board 110, and the length of the portion of the other end of the conductive wire extending out of the wiring space needs to be greater than the distance between the end of the motor shaft 210 and the main control board 110, so as to leave a margin for the conductive wire to move, avoid the portion of the conductive wire connected to the main control board 110 being too tight, and thus avoid the conductive wire from breaking due to the involvement of the main control board 110.

[0071] According to some embodiments of the utility model, the conductive component includes a conductive wire and a contact member, one end of the conductive wire is electrically connected to the circuit board 700, the other end of the conductive wire is electrically connected to the contact member, and the contact member is in sliding contact and conductively connected to the main control board 110. Specifically, one end of the motor shaft 210 is suitable for extending out of the handle tube 100 and is provided with an electric function component, the conductive wire is arranged in the wiring space inside the motor shaft 210, and one end of the conductive wire is electrically connected to the electric function component and the other end is electrically connected to the contact member, at least part of the contact member extends out of the wiring space of the motor shaft 210 to be electrically connected to the main control board 110, and the contact member is in sliding contact with the main control board 110, so that the main control board 110 and the conductive wire are electrically conductive, which can prevent the conductive wire from breaking due to the involvement of the main control board 110.

[0072] In some embodiments, a conductive structure is formed on the main control board 110 , and a sliding conductive structure is formed between the conductive structure and the contact element.

[0073] In some embodiments, the conductive structure is configured as a spring.

[0074] In some embodiments, one end of the motor shaft 210 extends out of the handle tube 100 and is provided with an electrical functional component, and the other end of the motor shaft 210 is provided with a fixing part. The conductive wire is arranged in the routing space inside the motor shaft 210, and one end of the conductive wire is electrically connected to the electrical functional component and the other end is installed to the fixing part. The contact member is installed to the fixing member to be electrically connected to the other end of the conductive wire, and at least part of the contact member extends out of the routing space of the motor shaft 210 to be electrically connected to the main control board 110.

[0075] To sum up, according to the electric toothbrush 1000 of the present invention, an insulating sleeve 300 is sleeved on the outside of the motor shaft 210 to reduce the risk of short circuit at the electrical connection between the upper and lower parts of the structure. The insulating sleeve 300 can increase the radius of the end structure of the motor shaft 210, thereby increasing the distance between adjacent first electrical connectors 500, further reducing the possibility of short circuit and improving the working reliability of the electric toothbrush 1000.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0077] Although embodiments of the present invention have been shown and described above, changes, modifications, substitutions and variations may be made to the embodiments described above.

Claims

1. An electric toothbrush, It is characterized in that include: A handle tube, wherein a main control panel is arranged in the handle tube; A motor, the motor is disposed in the handle tube, the motor comprises a motor shaft, at least a portion of the motor shaft extends out of the handle tube to cooperate with the electronic brush head of the electric toothbrush; An insulating sleeve, the insulating sleeve is fitted onto the motor shaft; as well as, A plurality of first electrical connectors are arranged at intervals in the insulating sleeve, the first electrical connector is electrically connected to the main control board, the first electrical connector is suitable for being inserted into the electronic brush head, and the first electrical connector is used to be electrically connected to the second electrical connector in the electronic brush head.

2. The electric toothbrush according to claim 1, It is characterized in that The plurality of first electrical connectors are disposed close to an end of the insulating sleeve away from the handle tube.

3. The electric toothbrush according to claim 1, It is characterized in that The outer peripheral wall of the insulating sleeve is provided with a first plane, and the plurality of first electrical connectors are arranged on the first plane.

4. The electric toothbrush according to claim 3, It is characterized in that The outer peripheral wall of the insulating sleeve is further provided with a second plane. In the radial direction of the motor shaft, one of the first plane and the second plane is located outside the other to form a step portion.

5. The electric toothbrush according to claim 4, It is characterized in that In the radial direction of the motor shaft, the first plane is located radially inside the second plane.

6. The electric toothbrush according to claim 4, It is characterized in that In the axial direction of the motor shaft, the length of the second plane is greater than the length of the first plane.

7. The electric toothbrush according to claim 1, It is characterized in that The insulating sleeve and the motor shaft are interference fit; or A fixing adhesive layer is provided between the insulating sleeve and the motor shaft.

8. The electric toothbrush according to claim 1, It is characterized in that A sealing ring is provided on the outer peripheral wall of the insulating sleeve, and the sealing ring is sealed and matched with the electronic brush head.

9. The electric toothbrush according to claim 8, It is characterized in that The sealing ring is arranged at the end of the insulating sleeve.

10. The electric toothbrush according to any one of claims 1 to 9, It is characterized in that It also includes a circuit board, which is arranged in the insulating sleeve. A plurality of first electrical connectors are contact points arranged on the circuit board, and the circuit board is connected to the main control board line.

11. The electric toothbrush according to claim 10, It is characterized in that The motor shaft is a hollow part to define a wiring space. The electric toothbrush also includes a conductive component for connecting the main control board and the circuit board. At least a part of the conductive component is located in the wiring space.

12. The electric toothbrush according to claim 11, It is characterized in that The conductive component is fixedly connected to the circuit board, and the connection between the conductive component and the circuit board is covered with an insulating adhesive layer, and / or the conductive component is fixedly connected to the main control board, and the connection between the conductive component and the main control board is covered with an insulating adhesive layer.

13. The electric toothbrush according to claim 12, It is characterized in that The conductive component includes a conductive wire, one end of which is electrically connected to the circuit board and the other end of which extends out of the wiring space to be electrically connected to the main control board. The length of the conductive wire extending out of the wiring space is greater than the distance between the end of the motor shaft and the main control board.

14. The electric toothbrush according to claim 11, It is characterized in that The conductive component includes a conductive wire and a contact piece, one end of the conductive wire is electrically connected to the circuit board, the other end of the conductive wire is electrically connected to the contact piece, and the contact piece is in sliding contact and conductive connection with the main control board.

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