Waterproof sealing sleeve, toothbrush handle and electric toothbrush

Abstract

The utility model belongs to the technical field of personal oral care, and particularly relates to a waterproof sealing sleeve, a toothbrush handle and an electric toothbrush, and the waterproof sealing sleeve comprises a sealing inner sleeve which is used for sleeving and sealing a motor shaft; the sealing outer sleeve is located on the periphery of the sealing inner sleeve, the sealing outer sleeve and the sealing inner sleeve are arranged at intervals, and the sealing outer sleeve is used for sealing between the motor sleeve and the brush handle shell; the connecting part, the sealing inner sleeve and the sealing outer sleeve are respectively provided with a first end and a second end in the axial direction, and the first end of the sealing inner sleeve and the first end of the sealing outer sleeve are connected into a whole through the connecting part; the sealing outer sleeve comprises a first cylinder wall, the first cylinder wall extends in the axial direction and comprises the first end of the sealing outer sleeve, and the second end of the sealing inner sleeve exceeds the first cylinder wall and extends into the motor sleeve. A good sealing effect is achieved by utilizing the unique shape of the waterproof sealing sleeve, so that the sealing position is not interfered by the vibration of the motor shaft, and the cleaning effect of the toothbrush is not reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of personal oral care, in particular to a waterproof sealing sleeve, a toothbrush handle and an electric toothbrush. Background Art

[0002] Toothbrushes are commonly used cleaning products in people's daily lives. With the improvement of people's living standards and the development of modernization, electric toothbrushes have gradually emerged to replace ordinary toothbrushes. Electric toothbrushes mainly use the electric motor to drive the brush head to rotate or vibrate at high speed, thereby achieving the effect of efficient teeth cleaning. It can effectively mix toothpaste and water, quickly produce rich foam to deeply clean the gaps between teeth, and at the same time, the vibration of the bristles can promote blood circulation in the mouth, massage the gum tissue, and bring a comfortable experience.

[0003] In the existing electric toothbrush design, most of them include a brush handle and a brush head. The brush handle is equipped with a motor and a motor shaft, which partially extends out of the brush handle shell and is connected to the brush head to drive the brush head to vibrate at high frequency to achieve cavity cleaning. The brush handle shell is provided with a connecting hole for the motor shaft to extend out, and a seal needs to be provided between the motor shaft and the connecting hole of the brush handle shell to seal and waterproof, thereby protecting the movement. However, in the prior art, the seal structure used is often solid, so that the motor shaft used by the seal lacks room for movement, which often leads to poor or even failure of the waterproof effect at the motor shaft during long-term use, thereby affecting the operation of the entire product and further affecting the product yield. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a waterproof sealing sleeve, a toothbrush handle and an electric toothbrush, which are used to solve the technical problem of poor waterproof sealing effect between the motor shaft and the handle shell of the electric toothbrush in the prior art.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the technical solution of the utility model is as follows:

[0006] A waterproof sealing sleeve, comprising:

[0007] A sealing inner sleeve, used for sleeve-mounting and sealing the motor shaft;

[0008] A sealing outer sleeve is located outside the sealing inner sleeve and is spaced apart from the sealing inner sleeve, and the sealing outer sleeve is used for sealing between the motor sleeve and the brush handle shell;

[0009] The connecting portion, the sealing inner sleeve and the sealing outer sleeve both have a first end and a second end along the axial direction, and the first end of the sealing inner sleeve and the first end of the sealing outer sleeve are connected as a whole through the connecting portion;

[0010] The sealing outer sleeve comprises a first cylinder wall, which extends in the axial direction and comprises a first end of the sealing outer sleeve, and a second end of the sealing inner sleeve exceeds the first cylinder wall and extends into the interior of the motor sleeve.

[0011] By sleeve-arranging a sealing inner sleeve on the motor shaft and sealingly clamping the sealing outer sleeve between the motor sleeve and the outer shell of the brush handle, a good sealing effect is achieved by utilizing the unique shape of the waterproof sealing sleeve, and the interval between the sealing inner sleeve and the first tube wall of the sealing outer sleeve allows elastic deformation, that is, when the motor shaft vibrates, the sealing inner sleeve can roughly and flexibly fit the motor shaft through the gap, so that the sealing part will not interfere with the vibration of the motor shaft, thereby not reducing the cleaning effect of the toothbrush, and because the sealing inner sleeve, the connecting part and the first tube wall are integrated, the motor shaft can be better sealed and fitted when the motor shaft moves. When the shaft has multiple degrees of freedom, especially when the motor shaft moves axially, the waterproof sealing sleeve as a whole will not form a gap with the motor shaft due to the movement of the motor shaft. The waterproof sealing sleeve always has a good sealing function and a stronger structural stability. The second end of the sealing inner sleeve exceeds the first cylinder wall. On the one hand, it increases the fitting length between the waterproof sealing sleeve and the motor shaft, which is more conducive to sealing. On the other hand, when the motor shaft vibrates, even under relevant working conditions, a gap is formed between part of the motor shaft and the sealing inner sleeve, while the remaining fitting positions will continue to be sealed, which enhances the reliability of the waterproof sealing sleeve and further facilitates the sealing of the waterproof sealing sleeve.

[0012] Optionally, the sealing inner sleeve is coaxially arranged with the first cylinder wall, and the interior of the sealing inner sleeve has a through hole penetrating along its own axial direction, and the through hole is suitable for matching with the motor shaft. In this structure, the through hole of the sealing inner sleeve is matched with the motor shaft, which is conducive to the sealing inner sleeve being sleeved on the motor shaft, and the sealing inner sleeve is coaxial with the first cylinder wall, so that the interval between the sealing inner sleeve and the first cylinder wall along the circumferential direction is basically the same. When the motor shaft vibrates, the substantially same interval in the circumferential direction allows the motor shaft to vibrate in roughly the same space, and there will be no problem of larger space in some directions and smaller space in some directions, thereby ensuring the reliability of the use of the waterproof sealing sleeve.

[0013] Optionally, a supporting protrusion is provided between the outer wall of the sealing inner sleeve and the inner wall of the first cylinder wall, and the supporting protrusion is located on the outer wall of the sealing inner sleeve or the inner wall of the first cylinder wall, and the supporting protrusion is used to abut against the first cylinder wall of the sealing outer sleeve when the sealing inner sleeve is deformed. This structure can enhance the ability of the sealing inner sleeve to resist deformation by abutting against the first cylinder wall or the sealing inner sleeve when both the sealing inner sleeve and the first cylinder wall are elastically deformed, thereby ensuring that the sealing inner sleeve is tightly fitted with the motor shaft, thereby ensuring the sealing effect.

[0014] Optionally, the support protrusions are arranged in a circle or multiple at intervals along the circumference of the sealing inner sleeve, and multiple groups of support protrusions are arranged along the axial direction of the sealing inner sleeve. This structure can improve the ability of the support protrusions to resist deformation and further improve the sealing effect by setting different layouts of the support protrusions.

[0015] Optionally, the support protrusion is integrally formed with the sealing inner sleeve, or the support protrusion is integrally formed with the first cylinder wall, and the free end of the support protrusion is arc-shaped. This structure is conducive to ensuring the strength of the support protrusion, and the arc-shaped free end of the support protrusion can ensure the smoothness of the support protrusion when it abuts.

[0016] Optionally, the inner side wall of the sealing inner sleeve is provided with a sealing protrusion, and the sealing protrusion is used to abut the motor shaft. In this structure, the sealing protrusion on the inner side of the sealing inner sleeve will contact and abut the motor shaft. Compared with other parts of the sealing inner sleeve, the sealing protrusion is more closely fitted to the motor shaft, which is conducive to strengthening the sealing effect of the sealing inner sleeve on the motor shaft along its axial direction, so that the sealing inner sleeve and the motor shaft are reliably sealed.

[0017] Optionally, the sealing protrusions are arranged in a circle or arranged at intervals along the circumference of the sealing inner sleeve, and / or the sealing protrusions are arranged in multiple groups along the axial direction of the sealing inner sleeve. This structure can improve the ability of the sealing protrusions to enhance the sealing performance by setting different layout modes of the sealing protrusions, and further improve the sealing effect on the motor shaft along its axial direction.

[0018] Optionally, a clamping member is wound around the outer wall of the sealing inner sleeve, and the clamping member is configured to clamp the sealing inner sleeve tightly onto the motor shaft. In this structure, the sealing inner sleeve can be clamped tightly onto the motor shaft by providing the clamping member, thereby strengthening the sealing connection between the sealing inner sleeve and the motor shaft and further enhancing the sealing effect.

[0019] Optionally, the holding member includes a clamp or a cable tie. This structure can ensure the holding and winding effect and reduce the manufacturing cost of the holding member.

[0020] Optionally, the sealing sleeve further includes a shoulder and a second barrel wall, the two ends of the shoulder are respectively connected to the first barrel wall and the second barrel wall, and the diameter of the first barrel wall is smaller than the diameter of the second barrel wall. This structure ensures that the first barrel wall of the sealing sleeve is connected to the second barrel wall through the shoulder, and the sealing sleeve is used to achieve sealing between the motor sleeve and the brush handle housing.

[0021] Optionally, the shoulder and the second barrel wall of the sealing sleeve are used to cover the motor sleeve, the shoulder is used to be sandwiched between the motor sleeve and the brush handle shell, and the second barrel wall is used to abut against the brush handle shell. This structure ensures that the shoulder and the second barrel wall can be tightly covered on the motor sleeve, and a sealing layer is formed between the shoulder and the brush handle shell, and another sealing layer is formed between the second barrel wall and the brush handle shell, ensuring a good seal between the motor and the brush handle shell, improving the reliability of the waterproof sealing sleeve, and ensuring waterproof sealing.

[0022] Optionally, the surface of the shoulder facing the brush handle housing is provided with an annular protrusion along its circumference, and the annular protrusion is used to abut the brush handle housing. In this structure, the annular protrusion can prevent water from entering between the shoulder and the brush handle housing, thereby ensuring the sealing effect along the radial direction of the motor shaft.

[0023] Optionally, the annular protrusions are continuously arranged in a circle or arranged at intervals along the circumference of the shoulder, and / or the annular protrusions are arranged in multiple groups along the radial direction of the shoulder. This structure can improve the ability of the annular protrusions to enhance sealing performance by setting different layouts of the annular protrusions, and further improve the sealing effect on the motor shaft along its radial direction.

[0024] Optionally, a metal piece is embedded inside the shoulder, and the metal piece is extended radially along the shoulder. In this structure, the metal piece can strengthen the overall structural strength of the waterproof sealing sleeve, and at the same time the metal piece has good elasticity, which is more conducive to the waterproof sealing sleeve to fit closely with other structures at the sealing part, and is more conducive to improving the sealing effect.

[0025] Optionally, the metal pieces are continuously arranged in a circle or arranged in intervals along the circumference of the shoulder. This structure can further improve the strength of the waterproof sealing sleeve and assist in improving the waterproof sealing performance by setting different layouts of the metal pieces.

[0026] Optionally, a limiting portion is provided on the second cylinder wall, the limiting portion protrudes in the radial direction of the second cylinder wall, and the limiting portion is used to sleeve the outer protrusion of the motor sleeve. This structure, on the one hand, facilitates the adaptive connection with the outer protrusion of the motor sleeve through the limiting portion, ensuring the reliable connection between the waterproof sealing sleeve and the motor sleeve; on the other hand, it can also prevent the waterproof sealing sleeve from rotating.

[0027] Based on the same concept, the utility model also provides a toothbrush handle, including a handle housing, a motor, a motor shaft connected to the output end of the motor, a motor sleeve sleeved on the motor, and the waterproof sealing sleeve as described above, wherein the sealing inner sleeve is sleeved on the motor shaft, and the sealing outer sleeve is located between the motor sleeve and the handle housing. In this way, the toothbrush handle using the waterproof sealing sleeve can have good sealing performance, ensuring that the sealing part will not be disturbed by the vibration of the motor shaft, thereby not reducing the cleaning effect of the toothbrush, and allowing the motor shaft to have multiple degrees of freedom of movement, and the waterproof sealing sleeve can always tightly seal the motor shaft, as well as the motor and the handle housing.

[0028] Optionally, the top wall of the brush handle shell has a connecting hole for the motor shaft to pass through, the first cylinder wall extends into the connecting hole, and the connecting portion and the end surface of the brush handle shell have a smooth transition;

[0029] Or the connecting portion exceeds the end surface of the brush handle shell, the outer wall of the first tube wall abuts against the inner wall of the communicating hole, or the outer wall of the first tube wall covers the inner wall of the communicating hole. This structure can ensure waterproof sealing at the communicating hole, prevent water from entering the brush handle shell from the communicating hole, and can help ensure the beauty of the external structure of the brush handle shell, and at the same time, it can also ensure that the structure of the waterproof sealing sleeve is not exposed too much.

[0030] Optionally, a reinforcing rib extending inward is provided on one side of the brush handle shell facing the motor sleeve, and the reinforcing rib abuts against the shoulder of the sealing sleeve. In this structure, the reinforcing rib can strengthen the sealing effect between the shoulder and the brush handle shell by abutting against the shoulder, and when the toothbrush handle falls, the impact force of the fall will cause the reinforcing rib to be displaced, deformed, etc., although the displacement or deformation is small, usually a few millimeters, the displacement or deformation can further make the reinforcing rib abut against the shoulder, which is sufficient to further improve the sealing effect, so that when the toothbrush handle falls, the overall sealing is strengthened, which is convenient for the use of the toothbrush handle.

[0031] Optionally, the reinforcing ribs are continuously arranged in a circle or arranged in a plurality of intervals along the circumference of the motor shaft. In this structure, the reinforcing ribs can be arranged in different layouts to improve the sealing performance of the reinforcing ribs.

[0032] Optionally, the sealing sleeve is arranged outside the motor sleeve, the shoulder of the sealing sleeve is located between the motor sleeve and the brush handle shell, and the brush handle shell is further provided with a clamping portion, and the motor sleeve and the clamping portion clamp the second cylinder wall of the sealing sleeve radially together. In this way, the clamping portion can clamp the second cylinder wall of the sealing sleeve to ensure the waterproof seal between the motor sleeve and the brush handle shell by the sealing sleeve, thereby enhancing the sealing effect.

[0033] Optionally, the brush handle shell further includes a reinforcement part, one end of which is connected to the clamping part, and the other end of which is connected to the side wall of the brush handle shell. This structure can improve the reliability of the overall structure. The reinforcement part is connected to the clamping part, so that the clamping part has better structural stability, and the clamping part better clamps the second cylinder wall, further improving the sealing.

[0034] Based on the same concept, the utility model also provides an electric toothbrush, including a brush head and a toothbrush handle as described above, wherein the brush head and the toothbrush handle are detachably connected. In this way, the electric toothbrush can be ensured to have good sealing performance, and the sealing part will not be disturbed by the vibration of the motor shaft, and the cleaning effect of the toothbrush will not be reduced. In the case of falling or collision, the waterproof sealing sleeve will fit the motor shaft more closely, and the sealing effect will be better.

[0035] As described above, the utility model has the following beneficial effects:

[0036] By sleeve-arranging a sealing inner sleeve on the motor shaft, and making the sealing outer sleeve sealingly clamped between the motor sleeve and the outer shell of the brush handle, a good sealing effect is achieved by utilizing the unique shape of the waterproof sealing sleeve, and the interval between the sealing inner sleeve and the first barrel wall allows elastic deformation, that is, when the motor shaft vibrates, the sealing inner sleeve can roughly and flexibly fit the motor shaft through the gap, so that the sealing part will not interfere with the vibration of the motor shaft, thereby not reducing the cleaning effect of the toothbrush, and because the sealing inner sleeve, the connecting part and the first barrel wall are integrated, the motor shaft can be better sealed and fitted when the motor shaft moves, and when the motor shaft has When there are multiple degrees of freedom, especially when the motor shaft moves axially, the waterproof sealing sleeve as a whole will not form a gap with the motor shaft due to the movement of the motor shaft, and the waterproof sealing sleeve always has a good sealing function and a stronger structural stability; and the second end of the sealing inner sleeve exceeds the first cylinder wall, on the one hand, the fitting length of the waterproof sealing sleeve and the motor shaft is strengthened, which is more conducive to sealing. On the other hand, when the motor shaft vibrates, even under relevant working conditions, a gap is formed between the motor shaft part and the sealing inner sleeve, and the remaining fitting positions will continue to seal, which strengthens the reliability of the waterproof sealing sleeve and further facilitates the sealing of the waterproof sealing sleeve. . BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 The structure of the waterproof sealing sleeve in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0038] Figure 2 The structure of the waterproof sealing sleeve in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0039] Figure 3 It is a cross-sectional view of the waterproof sealing sleeve in the embodiment of the utility model;

[0040] Figure 4 It is a schematic diagram of the assembly of the waterproof sealing sleeve, the motor sleeve and the motor shaft in the embodiment of the utility model;

[0041] Figure 5 In the embodiment of the utility model Figure 4 A cross-sectional view of

[0042] Figure 6 This is a cross-sectional view of the assembly of the waterproof sealing sleeve and the brush handle shell in the embodiment of the utility model;

[0043] Figure 7 In the embodiment of the utility model Figure 7 A partial enlarged view of

[0044] Figure 8 It is a schematic structural diagram of a toothbrush handle in an embodiment of the utility model.

[0045] Description of Reference Numerals

[0046] 100-waterproof sealing sleeve; 10-sealing inner sleeve; 11-through hole; 12-supporting protrusion; 13-sealing protrusion; 14-holding member; 20-sealing outer sleeve; 21-first cylinder wall; 22-shoulder; 221-annular protrusion; 222-metal member; 23-second cylinder wall; 30-connecting portion;

[0047] 200-brush handle housing; 201-connecting hole; 202-reinforcement rib; 203-clamping portion; 204-reinforcement portion;

[0048] 300-motor; 301-motor shaft;

[0049] 400-motor cover;

[0050] 500 - Toothbrush handle. DETAILED DESCRIPTION

[0051] The following is a specific embodiment of the present invention. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0052] It should be noted that the diagrams provided in the present embodiment are only used to illustrate the basic concept of the present invention in a schematic manner, so the diagrams only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation. The form, quantity and proportion of each component in actual implementation can be changed at will, and the layout of the components may also be more complicated. It should be noted that the structure, proportion, size, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no technical substantive significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect and purpose that the present invention can produce. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0053] Please combine Figures 1 to 5As shown, the utility model provides a waterproof sealing sleeve 100, comprising a sealing inner sleeve 10, a sealing outer sleeve 20 and a connecting portion 30, wherein the sealing inner sleeve 10 is used to sleeve and seal the motor shaft 301; the sealing outer sleeve 20 is located at the periphery of the sealing inner sleeve 10 and is spaced apart from the sealing inner sleeve 10, and the sealing outer sleeve 20 is used to seal the motor sleeve 400 and the brush handle shell 200; the sealing inner sleeve 10 and the sealing outer sleeve 20 both have a first end and a second end along the axial direction, the first end of the sealing inner sleeve 10 and the first end of the sealing outer sleeve 20 are connected as a whole through the connecting portion 30, and the second end of the sealing inner sleeve 10 and the second end of the sealing outer sleeve 20 are free ends; the sealing outer sleeve 20 includes a first barrel wall 21, the first barrel wall 21 extends in the axial direction and includes the first end of the sealing outer sleeve 20, and the second end of the sealing inner sleeve 10 exceeds the first barrel wall 21 and is used to extend into the motor sleeve 400.

[0054] For details, see Figure 5 The motor 300 in the electric toothbrush has a motor shaft 301, a motor sleeve 400 is sleeved on the motor 300, and a waterproof sealing sleeve 100 is used to seal between the motor shaft 301 and the brush handle housing 200, while allowing the motor shaft 301 to retain some movable space, thereby having a better waterproof effect. The waterproof sealing sleeve 100 is arranged on the top of the motor sleeve 400, and the sealing inner sleeve 10 is sleeved on the motor shaft 301. The first barrel wall 21 is used to be sealed between the motor shaft 301 and the brush handle housing 200, and the sealing outer sleeve 20 is used to be arranged between the motor sleeve 400 and the brush handle housing 200, and only allows the motor shaft 301 to pass through the waterproof sealing sleeve 100, which can prevent water from contacting the internal structure of the motor 300 and damaging its internal structure. Since the sealing inner sleeve 10, the connecting part 30 and the first cylinder wall 21 are integrated, the motor shaft 301 can be better sealed and fitted when the motor shaft 301 moves. When the motor shaft 301 has multiple degrees of freedom, especially when the motor shaft 301 moves axially, the waterproof sealing sleeve 100 as a whole will not form a gap with the motor shaft 301 due to the movement of the motor shaft 301. The waterproof sealing sleeve 100 always has a good sealing function and a stronger structural stability.

[0055] See also Figures 1 to 3 A sealing inner sleeve 10 is integrally formed in the sealing outer sleeve 20. The sealing inner sleeve 10 is used to be sleeved on the motor shaft 301. The first cylinder wall 21 and the sealing inner sleeve 10 jointly seal the motor shaft 301 and the brush handle outer shell 200. The sealing outer sleeve 20 further seals the motor sleeve 400 and the brush handle outer shell 200, thereby achieving the effect of sealing the internal structure as a whole.

[0056] In the above embodiment, the gap between the sealing inner sleeve 10 and the first tube wall 21 of the sealing outer sleeve 20 allows elastic deformation. The gap allows elastic deformation between the sealing inner sleeve 10 and the first tube wall 21, that is, when the motor shaft 301 vibrates, the sealing inner sleeve 10 can roughly and flexibly fit the motor shaft 301 through the gap, so that the seal will not interfere with the vibration of the motor shaft 301, thereby not reducing the cleaning effect of the toothbrush, and ensuring the sealing performance.

[0057] Continue reading Figures 1 to 3 In some embodiments, the sealing sleeve 20 has an inner cavity inside, and the sealing inner sleeve 10 is located in the inner cavity. Specifically, the sealing inner sleeve 10 is used for sealing between the motor shaft 301 and the brush handle shell 200. The sealing inner sleeve 10 can fit tightly on the motor shaft 301, effectively preventing liquid or dust from entering the connection between the brush handle shell 200 and the motor shaft 301, and ensuring the stable operation of the motor shaft 301; the sealing sleeve 20 is used for sealing between the motor sleeve 400 and the brush handle shell 200. The sealing sleeve 20 can fit tightly on the motor sleeve 400, further strengthening the sealing performance between the motor sleeve 400 and the brush handle shell 200, and preventing the motor 300 in the motor sleeve 400 from being disturbed by the external environment; The sealing inner sleeve 10 is located in the inner cavity of the sealing outer sleeve 20, and the first end (fixed end) of the sealing inner sleeve 10 is connected to the first cylinder wall 21 through the connecting portion 30, and the second end (free end) of the sealing inner sleeve 10 extends into the sealing outer sleeve 20. The sealing inner sleeve 10 can automatically adjust its position with the vibration of the motor shaft 301, and is suitable for extending into the motor sleeve 400 to play a supporting role. This design not only enhances the sealing effect between the motor sleeve 400 and the brush handle housing 200, but also the existence of the sealing inner sleeve 10 can absorb part of the vibration generated by the motor shaft 301 when working, thereby improving the stability of the overall structure. In this way, the sealing performance of the brush handle housing 200 can be effectively improved, and the stable operation of the internal components can be ensured. The sealing inner sleeve 10 and the first cylinder wall 21 form a double ring structure. The sealing inner sleeve 10 is used to be sleeved on the motor shaft 301 of the motor 300. The sealing inner sleeve 10 extends axially toward the second end of the sealing outer sleeve 20, and the second end of the sealing inner sleeve 10 exceeds the first cylinder wall 21. On the one hand, it is beneficial to increase the contact area between the sealing inner sleeve 10 and the motor shaft 301, strengthen the fitting length of the waterproof sealing sleeve 100 and the motor shaft 301, and further help to improve the sealing effect; on the other hand, when the motor shaft 301 vibrates, even under relevant working conditions, a gap is formed between part of the motor shaft 301 and the sealing inner sleeve 10, and the remaining fitting positions will continue to be sealed, which enhances the reliability of the waterproof sealing sleeve 100 and further facilitates the sealing of the waterproof sealing sleeve 100.

[0058] See also Figure 3In some embodiments, the sealing inner sleeve 10 is coaxially arranged with the first cylinder wall 21, and the sealing inner sleeve 10 has a through hole 11 penetrating along its own axial direction, and the through hole 11 is suitable for matching with the motor shaft 301. Specifically, the coaxial arrangement helps to ensure the precise alignment of the sealing inner sleeve 10 and the motor shaft 301, which is convenient for subsequent installation operations; the through hole 11 is suitable for matching with the motor shaft 301, and this adaptability ensures that the sealing inner sleeve 10 can be stably and reliably sleeved on the motor shaft 301, so that a good sealing effect can be maintained under various working conditions. In addition, the sealing inner sleeve 10 is coaxial with the first cylinder wall 21, so that the interval between the sealing inner sleeve 10 and the first cylinder wall 21 along the circumferential direction is basically the same. When the motor shaft 301 vibrates, the substantially same interval in the circumferential direction allows the motor shaft 301 to vibrate in roughly the same space, and there will be no problem of larger space in some directions and smaller space in some directions, thereby ensuring the reliability of the use of the waterproof sealing sleeve 100.

[0059] See also Figure 5 More specifically, the sealing sleeve 20 is used to cover the boss on the top of the motor sleeve 400, and the sealing inner sleeve 10 is used to extend into the motor sleeve 400 and abut against the bearing seat in the motor sleeve 400. The top boss of the motor sleeve 400 extends into the sealing sleeve 20 of the waterproof seal during assembly, and the sealing sleeve 20 covers the boss to seal the motor sleeve 400 and the brush handle housing; the second end of the sealing inner sleeve 10 exceeds the first barrel wall 21 and extends into the motor sleeve 400, and the sealing inner sleeve 10 extends all the way to the bearing seat in the motor sleeve 400. In this way, when the sealing inner sleeve 10 undergoes elastic deformation, it can contact or abut against the top wall of the bearing seat. This design makes full use of the supporting effect of the motor sleeve 400. Even in complex working environments, such as collisions, vibrations, etc., the sealing inner sleeve 10 can rely on the support of the motor sleeve 400 to maintain a stable sealing effect.

[0060] See also Figure 3In some embodiments, the sealing inner sleeve 10 is connected to the sealing outer sleeve 20 through a connecting portion 30, and the thickness of the connecting portion 30 is the same as that of the first barrel wall 21. Specifically, the sealing inner sleeve 10 is connected to the connecting portion 30. This design ensures the close fit between the sealing inner sleeve 10 and the first barrel wall 21, so that they can work together during operation, further improving the overall sealing performance. The first barrel wall 21 is connected to the connecting portion 30 in an arc transition, which is beneficial to the sealing between the motor shaft 301 and the brush handle housing 200 by the first barrel wall 21, and can connect the sealing inner sleeve 10 and the first barrel wall 21 through the connecting portion 30, and form a gap between the sealing inner sleeve 10 and the first barrel wall 21; the thickness of the connecting portion 30 is the same as that of the first barrel wall 21. This consistent thickness design not only ensures the structural strength and stability of the first barrel wall 21, but also helps to simplify the production process and reduce production costs.

[0061] See also Figure 3 and Figure 5 In some embodiments, a support protrusion 12 is provided between the outer side wall of the sealing inner sleeve 10 and the inner side wall of the first cylinder wall 21. The support protrusion 12 is located on the outer side wall of the sealing inner sleeve 10 or on the inner side wall of the first cylinder wall 21. The support protrusion 12 is used to abut against the first cylinder wall 21 of the sealing outer sleeve 20 when the sealing inner sleeve 10 is deformed. Specifically, the support protrusion 12 is provided between the outer side wall of the sealing inner sleeve 10 and the inner side wall of the first cylinder wall 21. The support protrusion 12 can be located on the outer side wall of the sealing inner sleeve 10 and protrude from the first cylinder wall 21 or located on the inner side wall of the first cylinder wall 21 and protrude from the sealing inner sleeve 10. This design flexibility allows adjustment according to actual needs to ensure the best support effect. When the sealing inner sleeve 10 and the first cylinder wall 21 are elastically deformed by external force or impact, the supporting protrusion 12 on the sealing inner sleeve 10 can abut against the inner wall of the first cylinder wall 21, or the supporting protrusion 12 on the first cylinder wall 21 can abut against the outer wall of the sealing inner sleeve 10, and the supporting protrusion 12 provides additional supporting force, thereby enhancing the ability of the sealing inner sleeve 10 to resist deformation, ensuring that the sealing inner sleeve 10 fits tightly with the motor shaft 301, and further ensuring the sealing effect, especially in complex working environments, such as vibration, collision, etc., can significantly improve the stability of the sealing inner sleeve 10 and the first cylinder wall 21, and ensure that the sealing effect is not affected.

[0062] It can be understood that the support protrusions 12 are arranged in a circle or multiple groups are arranged at intervals along the circumference of the sealing inner sleeve 10, and the support protrusions 12 are arranged in multiple groups along the axial direction of the sealing inner sleeve 10. Among them, the support protrusions 12 can be arranged in a circle along the circumference of the sealing inner sleeve 10. Such a layout can ensure that the sealing inner sleeve 10 is effectively supported in all directions, so that it has better stability when facing deformation; or, the support protrusions 12 are arranged in multiple groups at intervals along the circumference of the sealing inner sleeve 10. This layout gives the sealing inner sleeve 10 a certain flexibility; or, the support protrusions 12 are arranged in multiple groups along the axial direction of the sealing inner sleeve 10. This axial layout can ensure that the sealing inner sleeve 10 is better supported when subjected to axial pressure, which helps to improve its ability to resist deformation. By setting different layouts of the support protrusions 12, the distribution of the support protrusions 12 can be flexibly adjusted according to the actual use environment and needs to achieve the desired sealing effect.

[0063] Continue reading Figure 3 and Figure 5 It should be noted that the support protrusion 12 is integrally formed with the sealing inner sleeve 10, or the support protrusion 12 is integrally formed with the first cylinder wall 21, and the free end of the support protrusion 12 is in an arc shape. Among them, the one-piece molding design ensures the structural strength and stability of the support protrusion 12, so that it can better resist deformation during work and provide a stable support effect. At the same time, it also simplifies the production process and improves production efficiency. The free end of the support protrusion 12 is in an arc shape. The arc-shaped design helps to provide better smoothness when the support protrusion 12 abuts, reduces the friction with the contact surface, thereby avoiding unnecessary wear and tear, and at the same time, ensures the effective contact area of ​​the support protrusion 12 and its support effect.

[0064] See also Figure 3 and Figure 5 In some embodiments, the inner side wall of the sealing inner sleeve 10 is provided with a sealing protrusion 13, and the sealing protrusion 13 is used to resist the motor shaft 301. Specifically, the sealing protrusion 13 is integrally formed with the sealing inner sleeve 10, and the free end of the sealing protrusion 13 is arc-shaped. The sealing protrusion 13 is arranged on the inner side wall of the sealing inner sleeve 10 and protrudes inwardly thereof. The sealing protrusion 13 is used to resist the motor shaft 301 during assembly, reducing the possibility of external substances entering, thereby further strengthening the sealing effect of the motor shaft 301 along its own axial direction, making the sealing inner sleeve 10 and the motor shaft 301 more reliable; the sealing protrusion 13 is integrally formed with the sealing inner sleeve 10, and the integrally formed design ensures the structural strength and stability of the sealing protrusion 13, so that it can better resist deformation during work and provide a stable sealing effect; the free end of the sealing protrusion 13 is arc-shaped, and the arc-shaped design helps to provide better smoothness when the sealing protrusion 13 is close to the motor shaft 301, reducing friction, thereby avoiding unnecessary use wear.

[0065] Continue reading Figure 3 and Figure 5 It can be understood that the sealing protrusions 13 are arranged in a circle or multiple groups at intervals along the circumference of the sealing inner sleeve 10, and / or the sealing protrusions 13 are arranged in multiple groups along the axial direction of the sealing inner sleeve 10. Among them, the sealing protrusions 13 can be arranged in a circle along the circumference of the sealing inner sleeve 10. This layout ensures that the entire circumference of the motor shaft 301 is tightly covered by the sealing protrusions 13, thereby providing a strong sealing effect in all directions; or, the sealing protrusions 13 are arranged in multiple groups at intervals along the circumference of the sealing inner sleeve 10. This layout allows the sealing inner sleeve 10 to have greater flexibility in certain areas; or, the sealing protrusions 13 are arranged in multiple groups along the axial direction of the sealing inner sleeve 10. This layout strengthens the sealing effect of the sealing inner sleeve 10 in the axial direction of the motor shaft 301. In this way, by setting different layouts of the sealing protrusions 13, the distribution of the sealing protrusions 13 can be flexibly adjusted according to the actual use environment and needs, so as to improve the ability of the sealing protrusions 13 to enhance the sealing performance and further improve the sealing effect.

[0066] See also Figure 3 and Figure 5 In the above embodiment, a clamping member 14 is wound around the outer wall of the sealing inner sleeve 10, and the clamping member 14 is configured to clamp the sealing inner sleeve 10 on the motor shaft 301. Specifically, the clamping member 14 is provided on the outer wall of the sealing inner sleeve 10, so that the sealing inner sleeve 10 can be tightly clamped on the motor shaft 301, thereby further strengthening the sealing connection between the sealing inner sleeve 10 and the motor shaft 301, avoiding the problem of poor sealing or leakage that may occur during the movement of the motor shaft 301, and ensuring reliable sealing between the sealing inner sleeve 10 and the motor shaft 301 even if the motor shaft 301 vibrates, effectively improving the overall sealing performance.

[0067] Exemplarily, the clamping member 14 includes a clamp or a cable tie. Specifically, the clamp can adapt to different diameters of the motor shaft 301, and the sealing pressure between the sealing inner sleeve 10 and the motor shaft 301 can be flexibly adjusted by adjusting the tightness of the clamp. The cable tie has good adaptability and adjustability, and can be adjusted according to the actual size and shape. Both types of clamping members 14 have the effect of clamping and winding, and can effectively strengthen the sealing connection between the sealing inner sleeve 10 and the motor shaft 301; at the same time, the cost is relatively low, which is suitable for large-scale production and application.

[0068] See also Figures 3 to 5In some embodiments, the sealing sleeve 20 further includes a shoulder 22 and a second barrel wall 23, and the two ends of the shoulder 22 are respectively connected to the first barrel wall 21 and the second barrel wall 23, and the diameter of the first barrel wall 21 is smaller than the diameter of the second barrel wall 23. This structure ensures that the first barrel wall 21 of the sealing sleeve 20 is connected to the second barrel wall 23 through the shoulder 22, and the sealing sleeve 20 is used to achieve the sealing between the motor sleeve 400 and the brush handle housing 200.

[0069] Continue reading Figures 3 to 5 In the above embodiment, the shoulder 22 and the second barrel wall 23 of the sealing sleeve 20 are used to cover the motor sleeve 400, the shoulder 22 is configured to be sandwiched between the motor sleeve 400 and the brush handle shell 200, and the second barrel wall 23 is configured to abut against the brush handle shell 200. This structure ensures that the shoulder 22 and the second barrel wall 23 can be tightly covered on the motor sleeve 400, and a sealing layer is formed between the shoulder 22 and the brush handle shell 200, and another sealing layer is formed between the second barrel wall 23 and the brush handle shell 200, so as to ensure a good seal between the motor 300 and the brush handle shell 200, improve the reliability of the waterproof sealing sleeve 100, and ensure waterproof sealing performance. Specifically, the sealing sleeve 20 is sandwiched between the motor sleeve 400 and the brush handle housing 200, and the shoulder 22 and the second barrel wall 23 have an arc transition, which reduces the stress concentration point and improves the stability of the structure; the shoulder 22 and the second barrel wall 23 form a sealing structure, and the shoulder 22 is configured to abut against the top wall of the motor sleeve 400, so that the shoulder 22 can fit the top wall of the motor sleeve 400 tightly, effectively preventing moisture or other impurities from entering the motor sleeve 400; the second barrel wall 23 is configured to abut against the brush handle housing 200, so that the second barrel wall 23 can fit the brush handle housing 200 tightly, further enhancing the sealing performance between the brush handle housing 200 and the motor sleeve 400. In addition, the thickness of the shoulder 22 is greater than the thickness of the second barrel wall 23, so that the shoulder 22 has better stability when subjected to external pressure, and can better maintain sealing contact with the motor sleeve 400 and the brush handle housing 200.

[0070] See also Figure 3 and Figure 6In the above embodiment, the surface of the shoulder 22 facing the brush handle housing 200 is provided with an annular protrusion 221 along its own circumference, and the annular protrusion 221 is used to abut the brush handle housing 200. Specifically, the annular protrusion 221 is located on the upper surface of the shoulder 22 and protrudes in the direction away from the shoulder 22. The annular protrusion 221 can make the shoulder 22 better abut against the top wall of the brush handle housing 200, strengthen the sealing effect between the sealing sleeve 20 and the inner top wall of the brush handle housing 200, and prevent water from entering between the shoulder 22 and the brush handle housing 200, thereby ensuring the sealing effect along the radial direction of the motor shaft 301, and making the sealing between the sealing sleeve 20 and the brush handle housing 200 more reliable. The annular protrusion 221 and the shoulder 22 are integrally formed, and the integrally formed design ensures the structural strength and stability of the annular protrusion 221, so that it can better resist deformation during operation and provide a stable sealing effect.

[0071] It can be understood that the annular protrusion 221 is continuously arranged in a circle or arranged in multiple intervals along the circumference of the shoulder 22, and / or the annular protrusion 221 is arranged in multiple groups along the radial direction of the shoulder 22. Among them, the annular protrusion 221 is arranged in a circle along the circumference of the shoulder 22, and the circumferential continuous arrangement ensures that the annular protrusion 221 can provide a sealing effect in all directions; or, the annular protrusion 221 is arranged in multiple intervals in the circumference of the shoulder 22, which allows the sealing sleeve 20 to have greater flexibility in certain areas; the annular protrusion 221 is arranged in multiple groups along the radial direction of the shoulder 22. This radial arrangement further strengthens the sealing effect of the sealing sleeve 20 in the radial direction of the motor shaft 301, and can better prevent leakage along the radial direction of the motor shaft 301. The specific arrangement can be set according to actual needs. In this way, the ability of the annular protrusion 221 to enhance the sealing performance can be improved by setting different layouts of the annular protrusion 221, and further improves the sealing effect of the motor shaft 301 along its radial direction.

[0072] See also Figure 3 In some embodiments, a metal piece 222 is embedded inside the shoulder 22, and the metal piece 222 is extended radially along the shoulder 22. Specifically, the metal piece 222 is embedded in the shoulder 22. By embedding the metal piece 222, the structural strength of the entire shoulder 22 is significantly improved, so that it can better withstand external pressure and impact, and ensure the durability and stability of the sealing effect. The metal piece 222 has high strength and rigidity, and can provide better support effect to enhance the support and strength of the waterproof sealing sleeve 100. At the same time, the metal piece 222 has good elasticity, which is more conducive to the waterproof sealing sleeve 100 to fit closely with other structures at the sealing position, and is more conducive to improving the sealing effect.

[0073] It can be understood that the metal parts 222 are arranged in a circle continuously or in multiple intervals along the circumference of the shoulder 22. The metal parts 222 can be arranged in a circle along the circumference of the shoulder 22. This continuous arrangement ensures that the metal parts 222 can provide support and enhance strength in all directions; or the metal parts 222 can be arranged in multiple intervals along the circumference of the shoulder 22, allowing the shoulder 22 to have greater flexibility in certain areas. By setting different layouts of the metal parts 222, the distribution of the metal parts 222 can be flexibly adjusted according to the actual use environment and needs, so as to further improve the structural strength and sealing effect of the waterproof sealing sleeve 100.

[0074] See also Figure 2 and Figure 4 In the above embodiment, a limiting portion is provided on the second cylinder wall 23, and the limiting portion protrudes along the radial direction of the second cylinder wall 23, and the limiting portion is used to be sleeved on the outer protrusion of the motor cover 400 (not shown). Specifically, by providing a limiting portion on the second cylinder wall 23, when the waterproof sealing sleeve 100 and the motor cover 400 are matched, the limiting portion is sleeved on the outer protrusion of the motor cover 400, and the limiting portion is adapted to the outer protrusion. On the one hand, this design ensures a close fit between the two, and the limiting portion facilitates the adaptation and connection with the outer protrusion of the motor cover 400, thereby enhancing the connection stability between the waterproof sealing sleeve 100 and the motor cover 400, and can ensure the reliable connection between the waterproof sealing sleeve 100 and the motor cover 400; on the other hand, it can prevent the waterproof sealing sleeve 100 from rotating, thereby avoiding problems such as poor sealing or loose connection caused by rotation, and is more conducive to improving the sealing effect.

[0075] Continue reading Figure 2 and Figure 4 It can be understood that there are at least two limit parts evenly distributed along the circumference of the second cylinder wall 23. In this embodiment, two limit parts are symmetrically arranged along the circumference of the second cylinder wall 23, which enhances the stability of the limit parts, making the waterproof sealing sleeve 100 more stable after being installed on the motor cover 400, and not easy to rotate or move. Since the two limit parts are symmetrically distributed, they can support each other to form a stable limit structure, effectively preventing the waterproof sealing sleeve 100 from rotating on the motor cover 400, which is conducive to achieving the anti-rotation effect and improving the sealing performance.

[0076] It can be understood that the waterproof sealing sleeve 100 is a sealing sleeve made of a flexible material or an elastic material, including one of silicone, rubber or plastic. The sealing sleeve made of a flexible material or an elastic material has good elasticity and toughness, and can be deformed when subjected to external force, so as to achieve a tight fit and reliable elastic sealing effect. During long-term use, the waterproof sealing sleeve 100 is not prone to aging or corrosion, and can maintain its sealing performance for a long time. In addition, the waterproof sealing sleeve 100 made of this material is easy to process and install, and the production process is simple, so that the production can be completed quickly and accurately, and it is also convenient to install.

[0077] Based on the same idea, see Figures 6 to 8 The utility model also provides a toothbrush handle 500, comprising a handle housing 200, a motor 300, a motor shaft 301 connected to the output end of the motor 300, a motor sleeve 400 sleeved on the motor 300, and the waterproof sealing sleeve 100 as described above, wherein the sealing inner sleeve 10 is sleeved on the motor shaft 301, and the sealing outer sleeve 20 is located between the motor sleeve 400 and the handle housing 200. More specifically, the second end of the second barrel wall 23 is sleeved outside the motor sleeve 400, the shoulder 22 is located between the motor sleeve 400 and the handle housing 200, and the motor sleeve 400 and the handle housing 200 clamp the shoulder 22 along the axial direction. In this way, the toothbrush handle 500 using the above-mentioned waterproof sealing sleeve 100 can have good sealing performance, ensuring that the sealing part will not be disturbed by the vibration of the motor shaft 301, thereby not reducing the cleaning effect of the toothbrush, and allowing the motor shaft 301 to have multiple degrees of freedom of movement. The waterproof sealing sleeve 100 can always tightly seal the motor shaft 301, as well as the motor 300 and the brush handle housing 200.

[0078] See also Figure 3 , see Figures 5 to 8In the above embodiment, the top wall of the handle housing 200 has a connecting hole 201 through which the motor shaft 301 passes, the first barrel wall 21 extends into the connecting hole 201, and the connecting portion 30 smoothly transitions with the end surface of the handle housing 200; or the connecting portion 30 exceeds the end surface of the handle housing 200, and the outer wall of the first barrel wall 21 abuts against the inner wall of the connecting hole 201 or the outer wall of the first barrel wall 21 covers the inner wall of the connecting hole 201. Specifically, the first barrel wall 21 extends into the connecting hole 201, and the close fit between the first barrel wall 21 and the connecting hole 201 can effectively prevent water or other impurities from entering the interior of the handle housing 200 from the connecting hole 201, thereby ensuring the stable operation of the internal components and extending the service life of the entire electric toothbrush. The first barrel wall 21 is integrally connected with the sealing inner sleeve 10, and when the connecting portion 30 and the end surface of the brush handle shell 200 are smoothly transitioned, this smooth transition design ensures that the top surface of the connecting portion 30 and the end surface of the brush handle shell 200 are seamlessly connected, which not only makes the connecting portion 30 and the top wall of the brush handle shell 200 perfectly integrated, but also improves the overall aesthetics and coordination, which is conducive to ensuring the beauty, smoothness and simplicity of the external structure, and at the same time can ensure that the structure of the waterproof sealing sleeve 100 is not exposed too much; and the outer wall of the first barrel wall 21 abuts against the inner wall of the connecting hole 201, and the close contact surface provides a waterproof barrier. This abutment design ensures the sealing performance of the first barrel wall 21 at the connecting hole 201, increasing the first The stability between the barrel wall 21 and the brush handle shell 200 makes it difficult for the first barrel wall 21 to deviate or shake during operation, further improving the overall sealing performance and stability; or when the connecting portion 30 exceeds the end face of the brush handle shell 200, and the outer wall of the first barrel wall 21 covers the inner wall of the connecting hole 201, this design utilizes the complete coverage of the first barrel wall 21, and the additional protruding part can better block the intrusion of external moisture, improve the waterproof effect, further enhance the waterproof performance, and effectively prevent moisture from penetrating into the brush handle shell 200 from any angle. In this way, the waterproof seal at the connecting hole 201 can be guaranteed to prevent water from entering the brush handle shell 200 from the connecting hole 201.

[0079] See also Figure 7In some embodiments, a reinforcing rib 202 extending inward is provided on one side of the handle housing 200 facing the motor housing 400, and the reinforcing rib 202 abuts against the shoulder 22 of the sealing sleeve 20. Specifically, the reinforcing rib 202 can strengthen the sealing effect between the shoulder 22 and the handle housing 200 by abutting against the shoulder 22, and when the toothbrush handle 500 falls or collides, the impact force of the fall will cause the reinforcing rib 202 to be displaced, deformed, etc., although the displacement or deformation is small, usually a few millimeters, the displacement or deformation can further make the reinforcing rib 202 abut against the shoulder 22, which is sufficient to further improve the sealing effect, so that when the toothbrush handle 500 falls, the overall sealing is strengthened, which is convenient for the use of the toothbrush handle 500.

[0080] It is understandable that the reinforcing ribs 202 are continuously arranged in a circle or arranged in a plurality of intervals along the circumference of the motor shaft 301. In this way, the ability of the reinforcing ribs 202 to enhance sealing performance can be improved by setting different layouts of the reinforcing ribs 202.

[0081] Continue reading Figure 7 In the above embodiment, the sealing sleeve 20 is sleeved outside the motor sleeve 400, and the shoulder 22 of the sealing sleeve 20 is located between the motor sleeve 400 and the brush handle shell 200. The brush handle shell 200 is also provided with a clamping portion 203, and the motor sleeve 400 and the clamping portion 203 clamp the second cylinder wall 23 of the sealing sleeve 20 in the radial direction. Specifically, the clamping portion 203 extends inward from the top wall of the brush handle shell 200 to abut against the circumferential side of the second cylinder wall 23. In this way, the second cylinder wall 23 can be clamped by the clamping portion 203 to ensure the waterproof seal between the motor sleeve 400 and the brush handle shell 200 by the sealing sleeve 20, thereby enhancing the sealing effect. In addition, the clamping portion 203 cooperates with the waterproof sealing sleeve 100 to ensure the circumferential positioning of the waterproof sealing sleeve 100, which is also conducive to further enhancing the sealing effect. The clamping portion 203 is continuously arranged in a circle or multiple clamping portions are arranged at intervals along the circumference of the sealing sleeve 20. This structure can improve the ability of the clamping part 203 to enhance the sealing performance by setting different layouts of the clamping part 203 .

[0082] In addition, the brush handle housing 200 further includes a reinforcing portion 204, one end of which is connected to the clamping portion 203, and the other end of which is connected to the side wall of the brush handle housing 200. Specifically, the reinforcing portion 204 is located on the inner circumferential side wall of the brush handle housing 200, and the reinforcing portion 204 can be continuously arranged in a circle or arranged in multiple intervals along the circumference of the motor shaft 301, and the reinforcing portion 204 can be connected to the clamping portion 203 in a one-to-one correspondence. This structure can improve the reliability of the overall structure. The reinforcing portion 204 is connected to the clamping portion 203, so that the structural stability of the clamping portion 203 is better, and the clamping portion 203 can better clamp the second cylinder wall 23, and further better seal.

[0083] Based on the same concept, the utility model also provides an electric toothbrush, comprising a brush head and the toothbrush handle 500 as described above, wherein the brush head is connected to the motor shaft 301 of the toothbrush handle 500. In this way, the electric toothbrush can be ensured to have good sealing performance, and the sealing part will not be disturbed by the vibration of the motor shaft 301, and the cleaning effect of the toothbrush will not be reduced. In the case of falling or collision, the waterproof sealing sleeve 100 will also fit the motor shaft 301 more closely, and the sealing effect will be better.

[0084] In summary, the waterproof sealing sleeve 100, the toothbrush handle 500 and the electric toothbrush provided by the utility model are arranged on the motor shaft 301 through the sealing inner sleeve 10, and the sealing outer sleeve 20 is located between the motor sleeve 400 and the brush handle outer shell 200. The unique shape of the waterproof sealing sleeve 100 is used to achieve a good sealing effect. The gap between the sealing inner sleeve 10 and the first cylinder wall 21 allows elastic deformation, that is, when the motor shaft 301 vibrates, the sealing inner sleeve 10 can roughly and flexibly fit the motor shaft 301 through the gap, so that the sealing part does not It will interfere with the vibration of the motor shaft 301, thereby not reducing the cleaning effect of the toothbrush, and because the sealing inner sleeve 10, the connecting part 30 and the first tube wall 21 are integrated, the motor shaft 301 can be better sealed and fitted when the motor shaft 301 moves. When the motor shaft 301 has multiple degrees of freedom, especially when the motor shaft 301 moves axially, the waterproof sealing sleeve 100 as a whole will not form a gap with the motor shaft 301 due to the movement of the motor shaft 301. The waterproof sealing sleeve 100 always has a good sealing function and a stronger structural stability.

[0085] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A waterproof sealing sleeve, characterized in that: include: A sealing inner sleeve, used for sleeve-mounting and sealing the motor shaft; A sealing outer sleeve, located at the periphery of the sealing inner sleeve and spaced apart from the sealing inner sleeve, the sealing outer sleeve is used for sealing between the motor sleeve and the brush handle shell; A connecting portion, wherein the sealing inner sleeve and the sealing outer sleeve both have a first end and a second end along the axial direction, and the first end of the sealing inner sleeve and the first end of the sealing outer sleeve are connected as a whole through the connecting portion; The sealing outer sleeve comprises a first cylinder wall, the first cylinder wall extends in the axial direction and comprises a first end of the sealing outer sleeve, and the second end of the sealing inner sleeve exceeds the first cylinder wall and extends into the motor sleeve; The sealing sleeve also includes a shoulder and a second cylinder wall, wherein two ends of the shoulder are respectively connected to the first cylinder wall and the second cylinder wall, and the diameter of the first cylinder wall is smaller than the diameter of the second cylinder wall; a metal part is embedded in the interior of the shoulder, and the metal part is extended radially along the shoulder.

2. The waterproof sealing sleeve according to claim 1, characterized in that: The sealing inner sleeve is coaxially arranged with the first cylinder wall, and the interior of the sealing inner sleeve has a through hole penetrating along its own axial direction, and the through hole is suitable for matching with the motor shaft.

3. The waterproof sealing sleeve according to claim 1, characterized in that: A supporting protrusion is provided between the outer wall of the sealing inner sleeve and the inner wall of the first tube wall. The supporting protrusion is located on the outer wall of the sealing inner sleeve or on the inner wall of the first tube wall. The supporting protrusion is used to support the first tube wall of the sealing outer sleeve when the sealing inner sleeve is deformed.

4. The waterproof sealing sleeve according to claim 3, characterized in that: The support protrusions are arranged in a circle or in a plurality at intervals along the circumference of the sealing inner sleeve, and the support protrusions are arranged in a plurality of groups along the axial direction of the sealing inner sleeve.

5. The waterproof sealing sleeve according to claim 3, characterized in that: The supporting protrusion is integrally formed with the sealing inner sleeve, or the supporting protrusion is integrally formed with the first cylinder wall, and the free end of the supporting protrusion is in an arc shape.

6. The waterproof sealing sleeve according to claim 1, characterized in that: The inner side wall of the sealing inner sleeve is provided with a sealing protrusion, and the sealing protrusion is used to resist the motor shaft.

7. The waterproof sealing sleeve according to claim 6, characterized in that: The sealing protrusions are arranged in a circle or arranged in plurality at intervals along the circumference of the sealing inner sleeve, and / or the sealing protrusions are arranged in a plurality of groups along the axial direction of the sealing inner sleeve.

8. The waterproof sealing sleeve according to claim 1, characterized in that: A clamping piece is wound around the outer wall of the sealing inner sleeve, and the clamping piece is configured to clamp the sealing inner sleeve onto the motor shaft.

9. The waterproof sealing sleeve according to claim 8, characterized in that: The clamping member includes a clamp or a cable tie.

10. The waterproof sealing sleeve according to claim 1, characterized in that: The shoulder and the second barrel wall of the sealing sleeve are used to cover the motor sleeve, the shoulder is used to be sandwiched between the motor sleeve and the brush handle shell, and the second barrel wall is used to abut against the brush handle shell.

11. The waterproof sealing sleeve according to claim 10, characterized in that: The surface of the shoulder facing the brush handle shell is provided with an annular protrusion along its circumference, and the annular protrusion is used to abut against the brush handle shell.

12. The waterproof sealing sleeve according to claim 11, characterized in that: The annular protrusions are continuously arranged in a circle or arranged in plurality at intervals along the circumference of the shoulder, and / or the annular protrusions are arranged in a plurality of groups along the radial direction of the shoulder.

13. The waterproof sealing sleeve according to claim 1, characterized in that: The metal parts are continuously arranged in a circle or multiple metal parts are arranged at intervals along the circumference of the shoulder.

14. The waterproof sealing sleeve according to claim 1, characterized in that: A limiting portion is provided on the second cylinder wall. The limiting portion protrudes in the radial direction of the second cylinder wall and is used for sleeve-mounting the outer protrusion of the motor sleeve.

15. A toothbrush handle, characterized in that: It comprises a brush handle shell, a motor, a motor shaft connected to the output end of the motor, a motor sleeve sleeved on the motor and a waterproof sealing sleeve as described in any one of claims 1 to 14, wherein the sealing inner sleeve is sleeved on the motor shaft, and the sealing outer sleeve is located between the motor sleeve and the brush handle shell.

16. The toothbrush handle according to claim 15, characterized in that The top wall of the brush handle shell has a connecting hole for the motor shaft to pass through, the first cylinder wall extends into the connecting hole, and the connecting portion smoothly transitions with the end surface of the brush handle shell; Or the connecting portion exceeds the end surface of the brush handle shell, the outer wall of the first tube wall abuts against the inner wall of the connecting hole, or the outer wall of the first tube wall covers the inner wall of the connecting hole.

17. The toothbrush handle according to claim 15, characterized in that A reinforcing rib extending inward is provided on one side of the brush handle shell facing the motor sleeve, and the reinforcing rib abuts against the shoulder of the sealing sleeve.

18. The toothbrush handle according to claim 17, characterized in that The reinforcing ribs are continuously arranged in a circle or multiple reinforcing ribs are arranged at intervals along the circumference of the motor shaft.

19. The toothbrush handle according to claim 15, characterized in that The sealing sleeve is sleeved outside the motor sleeve, the shoulder of the sealing sleeve is located between the motor sleeve and the brush handle shell, the brush handle shell is also provided with a clamping portion, and the motor sleeve and the clamping portion jointly clamp the second cylinder wall of the sealing sleeve in the radial direction.

20. The toothbrush handle according to claim 19, characterized in that The brush handle shell further comprises a reinforcing portion, one end of which is connected to the clamping portion, and the other end of which is connected to the side wall of the brush handle shell.

21. An electric toothbrush, characterized in that: It comprises a brush head and a toothbrush handle as claimed in any one of claims 15 to 20, wherein the brush head is connected to the motor shaft of the toothbrush handle.

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