Handle and electric toothbrush

Abstract

The embodiments of the present disclosure provide a handle and an electric toothbrush. The handle comprises: a housing, provided with an extension hole in communication with an inner cavity of the housing; a motor assembly, comprising a motor and a motor shaft arranged on the motor, wherein the motor is arranged in the housing and located in the inner cavity, and the motor shaft extends out of the housing via the extension hole and is configured to be connected with a brush head; and a seal assembly, arranged at the extension hole and comprising a first seal member, a second seal member, and a support member, wherein the first seal member sleeves the motor shaft in a sealing manner, the second seal member sleeves the motor shaft, abuts against the inner wall of the housing in a sealing manner, and is disconnected from the first seal member, and the support member circumferentially sleeves the motor shaft and is sandwiched between the first seal member and the second seal member in a sealing manner. According to the handle provided by the present disclosure, the seal assembly will not be damaged from twisting or stretching, thus providing better waterproof performance.

Description

Handle and electric toothbrush Technical Field

[0001] The present disclosure relates to the technical field of electric toothbrushes, and in particular to a handle and an electric toothbrush. Background Art

[0002] Since electric toothbrushes are easy to operate and provide a clean brushing experience, they are becoming increasingly popular among consumers. The motor shaft of an electric toothbrush usually needs to extend out of the extension hole on the housing to connect to the brush head. Considering the waterproofness, the gap between the motor shaft and the extension hole needs to be sealed. In the related art, in order to seal the gap between the motor shaft and the extension hole, a sealing sleeve is usually provided in the gap. The sealing sleeve needs to seal the extension hole and the motor shaft. In order for the sealing sleeve to be able to seal the motor shaft, it is usually necessary to put the sealing sleeve on the motor shaft, and a spring is provided on the outside of the sealing sleeve so that the sealing sleeve is tightly fixed on the motor shaft.

[0003] However, as the movement modes of electric toothbrush motor shafts become more and more diversified, for example, motor shafts that can rotate greatly or even 360 degrees, or motor shafts that can swing back and forth and extend and retract, under such movement modes, the sealing sleeve fixed on the motor shaft will be twisted or pulled, seriously affecting the waterproof performance of the electric toothbrush.

[0004] Summary of the Invention

[0005] According to various embodiments disclosed in the present disclosure, a handle and an electric toothbrush are provided.

[0006] A handle comprising a housing, a core assembly and a sealing assembly;

[0007] The housing is provided with a protrusion hole communicating with the inner cavity of the housing;

[0008] The core assembly includes a core and a motor shaft arranged in the core, the core is arranged in the housing and located in the inner cavity, and the motor shaft is exposed outside the housing through the extension hole and is used to connect with the brush head;

[0009] The sealing assembly is arranged at the extension hole, and the sealing assembly includes a first seal, a second seal and a support member. The first seal is sealed on the motor shaft, the second seal is sleeved on the motor shaft, sealed and abutted against the inner wall of the casing and disconnected from the first seal, and the support member is ring-circled on the motor shaft and the seal is clamped between the first seal and the second seal.

[0010] As an optional implementation of the embodiment of the present disclosure, the support member provides a supporting force to the first sealing member toward the motor shaft, and the support member provides a supporting force to the second sealing member toward the inner wall of the casing;

[0011] The second sealing member forms a sealing fit with the hole wall of the extension hole, the first sealing member forms a sealing fit with the motor shaft, and the first sealing member forms a sealing fit with the second sealing member.

[0012] As an optional implementation of the embodiment of the present disclosure, the movement abuts against the support member so that the second sealing member is sealed against the inner wall of the casing through the support member, and / or the support member seals and presses the first sealing member between the support member and the movement.

[0013] As an optional implementation of the embodiment of the present disclosure, the first sealing member is fixed to the motor shaft, and the second sealing member is slidably arranged relative to the motor shaft.

[0014] As an optional implementation of the embodiment of the present disclosure, the first sealing member and the motor shaft are slidably arranged, and the support member provides a supporting force for clamping the first sealing member to the motor shaft.

[0015] As an optional implementation of the embodiment of the present disclosure, the first sealing member includes: a ring body portion and a deformation portion, wherein the ring body portion is sleeved on the motor shaft;

[0016] The deformation portion is provided on the ring body portion along the circumference of the ring body portion. The deformation portion is used to abut against the motor shaft seal. The deformation portion abuts against the support member and / or the movement.

[0017] As an optional implementation of the embodiment of the present disclosure, the deformation portion and the motor shaft are slidably arranged.

[0018] As an optional implementation of the embodiment of the present disclosure, there is a gap between the ring body and the motor shaft.

[0019] As an optional implementation of the embodiment of the present disclosure, the deformation portion includes: a first annular deformation portion and a second annular deformation portion;

[0020] One axial end of the first annular deformable portion is connected to the annular body portion, and the other axial end of the first annular deformable portion is inclined toward the direction close to the motor shaft so as to be in sealing contact with the motor shaft;

[0021] One axial end of the second annular deformable portion is connected to the annular body portion, and the other axial end of the second annular deformable portion is inclined in a direction away from the first annular deformable portion to seal and abut against the support member.

[0022] As an optional implementation of the embodiment of the present disclosure, a first hole is provided on the support member, and the motor shaft is passed through the first hole. The diameter of the first hole is smaller than the outer diameter of the second annular deformation portion and larger than the inner diameter of the first annular deformation portion, so that the support member is sealed and pressed against the second annular deformation portion and is out of contact with the first annular deformation portion, and the ring body abuts against the movement.

[0023] As an optional implementation of the embodiment of the present disclosure, there are multiple first seals, and the multiple first seals are arranged in parallel along the axial direction of the motor shaft. The support member seals and presses the multiple first seals between the support member and the movement.

[0024] As an optional implementation of the embodiment of the present disclosure, the first annular deformation portion and the second annular deformation portion of at least one of the multiple first seals are oriented toward the side of the ring body portion close to the extension hole, and the first annular deformation portion and the second annular deformation portion of the remaining first seals are oriented toward the side of the ring body portion away from the extension hole.

[0025] As an optional implementation of the embodiment of the present disclosure, a second hole is provided on the movement, the motor shaft is passed through the second hole, and the diameter of the second hole is smaller than the outer diameter of the second annular deformation portion and larger than the inner diameter of the first annular deformation portion.

[0026] As an optional implementation of the embodiment of the present disclosure, the second sealing member is an integrated component, and the second sealing member includes: a first sleeve, a second sleeve and a connecting ring;

[0027] The first sleeve is sleeved on the motor shaft, and the outer wall of the first sleeve is in sealing contact with the inner wall of the housing, and the inner wall of the first sleeve is in contact with the support member;

[0028] The first axial end of the second sleeve is disposed on the first sleeve, and the second axial end of the second sleeve extends to the open end of the extension hole; and

[0029] The outer periphery of the connecting ring is connected to the second axial end of the second sleeve body, and the annular hole of the connecting ring is used for the motor shaft to pass through.

[0030] As an optional implementation of the embodiment of the present disclosure, the annular surface of the connecting ring is flush with the open end.

[0031] As an optional implementation of the embodiment of the present disclosure, the surface where the outer wall of the first sleeve abuts against the inner wall of the housing includes an end surface and a cylindrical surface, and an angle is formed between the end surface and the cylindrical surface.

[0032] As an optional implementation of the embodiment of the present disclosure, the second sealing member further includes:

[0033] The third sleeve is sleeved on the motor shaft and contacts the motor shaft. The first axial end of the third sleeve is connected to the annular hole of the connecting ring, and the second axial end of the third sleeve extends toward the inner cavity.

[0034] As an optional implementation of the embodiment of the present disclosure, the support member includes: a cover portion and a support portion;

[0035] The cover is tightly clamped between the first sealing member and the second sealing member;

[0036] The supporting portion is disposed on the cover portion and extends between the second sleeve, the connecting ring and the third sleeve.

[0037] As an optional implementation of the embodiment of the present disclosure, there is a gap between the support portion and the second sleeve, and / or there is a gap between the support portion and the connecting ring, and / or there is a gap between the support portion and the third sleeve.

[0038] As an optional implementation of the embodiment of the present disclosure, a sealing reinforcement portion is provided on the inner surface of the third sleeve, and the sealing reinforcement portion is sealed on the motor shaft.

[0039] As an optional implementation of the embodiment of the present disclosure, the sealing reinforcement portion is a convex ring provided on the inner surface of the third sleeve along the circumference of the third sleeve.

[0040] As an optional implementation of the embodiment of the present disclosure, the third sleeve includes an accordion-shaped pleated section, and the pleated section sealing sleeve is arranged on the motor shaft.

[0041] The present disclosure discloses an electric toothbrush, comprising: any one of the handles and brush heads described above;

[0042] The brush head is connected to the motor shaft.

[0043] Other features and advantages of the present disclosure will be described in the following description and, in part, will become apparent from the description or be learned through practice of the present disclosure. The objectives and other advantages of the present disclosure are realized and obtained by the structures particularly pointed out in the description, claims, and drawings. Details of one or more embodiments of the present disclosure are set forth in the following drawings and description.

[0044] In order to make the above-mentioned objects, features and advantages of the present disclosure more obvious and easy to understand, optional embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0046] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0047] FIG1 is a schematic structural diagram of a handle provided by one or more embodiments of the present disclosure;

[0048] Figure 2 is an exploded view of the handle in Figure 1;

[0049] FIG3 is a schematic structural diagram of the handle in FIG1 from another perspective;

[0050] FIG4 is a cross-sectional view of the handle in FIG3 at position AA;

[0051] FIG5 is a schematic structural diagram of the first sealing member in FIG4 ;

[0052] FIG6 is a cross-sectional view of the first sealing member in FIG5 at position BB;

[0053] FIG7 is a cross-sectional view of another handle provided by one or more embodiments of the present disclosure at position AA;

[0054] FIG8 is a schematic structural diagram of the second sealing member in FIG7;

[0055] FIG9 is a cross-sectional view of the second sealing member in FIG8 at position CC;

[0056] FIG10 is a schematic structural diagram of the support member in FIG7;

[0057] FIG11 is a cross-sectional view of the support member in FIG10 at position DD;

[0058] FIG12 is a schematic structural diagram of an electric toothbrush provided by one or more embodiments of the present disclosure. DETAILED DESCRIPTION

[0059] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features therein can be combined with each other in the absence of conflict.

[0060] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0061] The terms "first" and "second" in the specification and claims of this disclosure are used to distinguish different objects, rather than to describe a specific order of objects. For example, the terms "first camera" and "second camera" are used to distinguish different cameras, rather than to describe a specific order of cameras.

[0062] In the embodiments of the present disclosure, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present disclosure should not be interpreted as being more preferred or advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner. In addition, in the description of the embodiments of the present disclosure, unless otherwise specified, the meaning of "a plurality" refers to two or more.

[0063] The technical solution of the present disclosure will be further described below with reference to specific embodiments and drawings.

[0064] The present disclosure provides a handle 100, referring to Figures 1 and 2, the handle 100 includes: a casing 1, a movement assembly 2 and a sealing assembly 3, wherein, referring to Figures 2, 3 and 4, the casing 1 is provided with an extension hole 12 connected to the inner cavity 11 of the casing 1, the movement assembly 2 includes a movement 21 and a motor shaft 22 arranged on the movement 21, the movement 21 is arranged in the casing 1 and located in the inner cavity 11, the motor shaft 22 is exposed outside the casing 1 through the extension hole 12, and is used to be connected to the brush head, the sealing assembly 3 is arranged at the extension hole 12, the sealing assembly 3 includes a first seal 31, a second seal 32 and a support member 33, the first seal 31 is sealingly sleeved on the motor shaft 22, the second seal 32 is sleeved on the motor shaft 22, sealingly abuts against the inner wall of the casing 1 and is disconnected from the first seal 31, the support member 33 is ringed on the motor shaft 22 and the sealing clamp is arranged between the first seal 31 and the second seal 32.

[0065] In this embodiment, since the first sealing member 31 is sealedly sleeved on the motor shaft 22, the motor shaft 22 can be sealed by the first sealing member 31. In addition, since the second sealing member 32 is sleeved on the motor shaft 22 and is in sealing contact with the inner wall of the housing 1, the extension hole 12 can be sealed by the second sealing member 32. Then, since the support member 33 is sleeved on the motor shaft 22 and the sealing clamp is arranged between the first sealing member 31 and the second sealing member 32, the support member 33 can achieve the sealing between the first sealing member 31 and the second sealing member 32. At this point, the purpose of sealing the gap between the entire extension hole 12 and the motor shaft 22 can be achieved, thereby preventing water from entering the inner cavity 11 of the housing 1 through the gap between the extension hole 12 and the motor shaft 22, thereby achieving the purpose of waterproofing.

[0066] Among them, since the second seal 32 is disconnected from the first seal 31, the second seal 32 for sealing the extension hole 12 and the first seal 31 for sealing the motor shaft 22 can be two independent components. In this way, the separation of the seal of the extension hole 12 and the seal of the motor shaft 22 can be achieved, so that the sealing assembly 3 will not constrain the movement of the motor shaft 22, and further, when the motor shaft 22 rotates, swings or expands and contracts along the axial direction of the motor shaft 22 relative to the first seal 31, it will not affect the second seal 32, thereby avoiding or reducing the occurrence of the entire sealing assembly 3 being twisted or pulled during the movement of the motor shaft 22, so that the sealing effect of the sealing assembly 3 is improved, and thus the waterproof performance of the handle 100 can be improved.

[0067] In addition, since the support member 33 is ring-shaped on the motor shaft 22 and the sealing clamp is arranged between the first sealing member 31 and the second sealing member 32, the support member 33 can provide support to the first sealing member 31 and the second sealing member 32, so that the first sealing member 31 and the second sealing member 32 can both have a better sealing effect, thereby making the handle 100 more waterproof.

[0068] Specifically, when the motor shaft 22 expands and contracts along the axial direction of the motor shaft 22, since the second seal 32 for sealing the extension hole 12 and the first seal 31 for sealing the motor shaft 22 are two independent components, the impact of the expansion and contraction movement of the motor shaft 22 on the first seal 31 will not be transmitted to the second seal 32 through the first seal 31, so that the second seal 32 can still play a very stable and good sealing effect, thereby making the sealing effect of the entire sealing assembly 3 better.

[0069] Based on this, when the handle 100 is the handle 100 of the electric toothbrush 200 , it is obvious that the waterproof performance of the electric toothbrush 200 can be improved.

[0070] Of course, the handle 100 being the handle 100 of the electric toothbrush 200 is only one possible understanding given in this embodiment. Of course, the handle 100 can also be used in other devices. For example, the handle 100 can also be a handle for brushing the floor or a handle for brushing the wall, etc. This embodiment does not limit this.

[0071] It should be noted that the support member 33 may be a plastic support member 33 or a stainless steel support member 33, etc., as long as it can support the first sealing member 31 and the second sealing member 32, and this embodiment does not limit this. The first sealing member 31 and the second sealing member 32 may both be flexible sealing members, specifically rubber sealing members or polyvinyl chloride sealing members, etc., and this embodiment does not limit this.

[0072] In some embodiments, referring to FIG4 , the support member 33 provides a supporting force to the first seal 31 toward the motor shaft 22 , the support member 33 provides a supporting force to the second seal 32 toward the inner wall of the housing 1 , the second seal 32 forms a sealing fit with the hole wall of the extension hole 12 , the first seal 31 forms a sealing fit with the motor shaft 22 , and the first seal 31 forms a sealing fit with the second seal 32 .

[0073] By enabling the support member 33 to provide a supporting force to the first sealing member 31 toward the motor shaft 22, the sealing effect between the first sealing member 31 and the motor shaft 22 can be improved. Similarly, by enabling the support member 33 to provide a supporting force to the second sealing member 32 toward the inner wall of the housing 1, the sealing effect between the second sealing member 32 and the inner wall of the housing 1 can be improved.

[0074] By making the second seal 32 form a sealing fit with the wall of the extension hole 12, the first seal 31 forms a sealing fit with the motor shaft 22, and the first seal 31 forms a sealing fit with the second seal 32, the whole formed by the first seal 31 and the second seal 32 can better seal the gap between the motor shaft 22 and the extension hole 12, thereby further improving the waterproof performance of the handle 100.

[0075] In some embodiments, referring to FIG4 , the movement 21 abuts against the support member 33, so that the second sealing member 32 is sealed against the inner wall of the housing 1 through the support member 33. By abutting the movement 21 against the support member 33, the second sealing member 32 can be clamped between the inner wall of the housing 1 and the support member 33, thereby achieving a tighter seal between the second sealing member 32 and the inner wall of the housing 1, and between the second sealing member 32 and the support member 33, thereby improving the sealing effect of the second sealing member 32.

[0076] Furthermore, in some embodiments, referring to FIG4 , the support member 33 seals and presses the first sealing member 31 between the support member 33 and the movement 21. By having the support member 33 seal and press the first sealing member 31 between the support member 33 and the movement 21, the seals between the first sealing member 31 and the support member 33, and between the first sealing member 31 and the movement 21, can be made tighter, thereby improving the sealing effect of the first sealing member 31.

[0077] In some embodiments, the first sealing member 31 is fixed to the motor shaft 22 , and the second sealing member 32 is slidably disposed relative to the motor shaft 22 .

[0078] Because the first seal 31 is fixed to the motor shaft 22, when the motor shaft 22 moves (swings, telescopes back and forth along the axial direction of the motor shaft 22, or rotates around the axis of the motor shaft 22, etc.), it can drive the first seal 31 to move with the motor shaft 22. Furthermore, because the second seal 32 is slidably arranged relative to the motor shaft 22, when the motor shaft 22 drives the first seal 31 to move, the second seal 32 does not move with the movement of the motor shaft 22, so the sealing effect of the second seal 32 is still very good.

[0079] It can be seen that by fixing the first seal 31 to the motor shaft 22 and slidably arranging the second seal 32 relative to the motor shaft 22, the sealing effect of the second seal 32 can be ensured not to be affected when the motor shaft 22 moves greatly, thereby better ensuring the sealing effect of the entire sealing assembly 3.

[0080] In addition, by fixing the first sealing member 31 to the motor shaft 22 , the sealing effect between the first sealing member 31 and the motor shaft 22 can be improved, and water seepage between the first sealing member 31 and the motor shaft 22 will not occur.

[0081] Among them, there are many ways to fix the above-mentioned first seal 31 to the motor shaft 22. For example, in one possible implementation method, the first seal 31 can be fixed to the motor shaft 22 by an elastic ring, a clamp, etc., or it can be fixed to the motor shaft 22 by other means, which is not limited in this embodiment.

[0082] In some embodiments, the first sealing member 31 and the motor shaft 22 are slidably arranged, and the support member 33 provides a supporting force for clamping the first sealing member 31 to the motor shaft 22 .

[0083] Since the first seal 31 and the motor shaft 22 are slidably arranged, when the motor shaft 22 moves (swings, stretches back and forth along the axial direction of the motor shaft 22, or rotates around the axis of the motor shaft 22, etc.), the first seal 31 can remain stationary. In this way, the seal constructed by the first seal 31 and the support 33 will not be affected by the movement of the first seal 31, and the seal constructed between the support 33 and the second seal 32, as well as the seal constructed between the second seal 32 and the inner wall of the casing 1 will not be affected, making the above-mentioned sealing relationships more stable, and thus the sealing effect of the entire sealing assembly 3 can be better.

[0084] By enabling the support member 33 to provide support force for clamping the first seal 31 to the motor shaft 22, the first seal 31 can be in closer contact with the motor shaft 22, thereby better avoiding water seepage between the first seal 31 and the motor shaft 22, thereby achieving a better sealing effect between the first seal 31 and the motor shaft 22.

[0085] Among them, there are many ways to implement the above-mentioned first seal 31. In one possible implementation, referring to Figures 4, 5 and 6, the first seal 31 includes: a ring body 311 and a deformation portion 312, wherein the ring body 311 is sleeved on the motor shaft 22, and the deformation portion 312 is arranged on the ring body 311 along the circumference of the ring body 311, and the deformation portion 312 is used to seal and abut with the motor shaft 22, and the deformation portion 312 abuts with the support member 33 and / or the movement 21.

[0086] Since the deformable portion 312 is in sealing contact with the motor shaft 22 , when the motor shaft 22 moves, the deformable portion 312 can adapt to the movement of the motor shaft 22 and deform, thereby enabling the first seal 31 to have a better movable sealing effect on the motor shaft 22 .

[0087] In some embodiments, the deformation portion 312 and the motor shaft 22 are slidably disposed.

[0088] By making the deformation part 312 and the motor shaft 22 slidable, the deformation part 312 can remain stationary when the motor shaft 22 swings, stretches back and forth along the axial direction of the motor shaft 22, or rotates around the axis of the motor shaft 22. In this way, the seal constructed between the deformation part 312 and the support member 33 will not be affected by the movement of the deformation part 312, and the seal constructed between the support member 33 and the second sealing member 32, as well as the seal constructed between the second sealing member 32 and the inner wall of the casing 1 will not be affected, making the above-mentioned sealing relationships more stable, and thus the sealing effect of the entire sealing assembly 3 can be better.

[0089] In some embodiments, referring to Figures 4 and 6, there is a gap between the ring body 311 and the motor shaft 22. By providing a gap between the ring body 311 and the motor shaft 22, at least one section of the ring body 311 can be made not to contact the motor shaft 22. In this way, the contact area between the entire first seal 31 and the motor shaft 22 can be reduced, and the friction between the entire first seal 31 and the motor shaft 22 can be reduced. As a result, the first seal 31 will not move with the rotation or extension and other actions of the motor shaft 22. On the one hand, the wear of the first seal 31 can be reduced. On the other hand, when the motor shaft 22 moves, the first seal 31 can still have a good active sealing effect on the motor shaft 22.

[0090] There are many ways to implement the above-mentioned deformation portion 312. In one possible implementation, referring to Figures 5 and 6, the deformation portion 312 includes: a first annular deformation portion 3121 and a second annular deformation portion 3122, wherein one axial end of the first annular deformation portion 3121 is connected to the ring body portion 311, and the other axial end of the first annular deformation portion 3121 is inclined toward the direction close to the motor shaft 22 so as to be sealed and abutted with the motor shaft 22, and one axial end of the second annular deformation portion 3122 is connected to the ring body portion 311, and the other axial end of the second annular deformation portion 3122 is inclined toward the direction away from the first annular deformation portion 3121 so as to be sealed and abutted with the support member 33.

[0091] When one axial end of the first annular deformation portion 3121 is connected to the ring body portion 311, the other axial end of the first annular deformation portion 3121 is inclined toward the direction close to the motor shaft 22 to seal and abut against the motor shaft 22, and one axial end of the second annular deformation portion 3122 is connected to the ring body portion 311, and the other axial end of the second annular deformation portion 3122 is inclined toward the direction away from the first annular deformation portion 3121 to seal and abut against the support member 33, the longitudinal cross-section of the first seal 31 can be roughly "Y"-shaped, and the two oblique sides of the "Y" are respectively sealed and abutted against the support member 33 and the motor shaft 22. In this way, since the "Y"-shaped first seal 31 has the advantage of being able to deform quickly to adapt to the movement of the motor shaft 22, in addition, the inventors have found that the "Y"-shaped first seal 31 has a better effect on the active sealing of the motor shaft 22 during the telescopic movement. Therefore, when the first seal 31 is a "Y"-shaped first seal 31, the waterproof performance of the handle 100 can be further improved.

[0092] In some embodiments, referring to Figures 4 and 6, a first hole 331 is provided on the support member 33, and the motor shaft 22 is passed through the first hole 331. The diameter of the first hole 331 is smaller than the outer diameter of the second annular deformation portion 3122 and larger than the inner diameter of the first annular deformation portion 3121, so that the support member 33 is sealed and pressed against the second annular deformation portion 3122 and is out of contact with the first annular deformation portion 3121, and the ring body portion 311 abuts against the movement 21.

[0093] Since the diameter of the first hole 331 is smaller than the outer diameter of the second annular deformable portion 3122 and larger than the inner diameter of the first annular deformable portion 3121, when the support member 33 is sealed and pressed against the first sealing member 31, the support member 33 can just be pressed against the second annular deformable portion 3122 and disengaged from the first annular deformable portion 3121. In this way, the first annular deformable portion 3121 will be in a free state with a larger movable margin, thereby enabling the first annular deformable portion 3121 to have a better movable sealing effect on the motor shaft 22.

[0094] The shape of the first hole 331 can be circular or other possible shapes, which is not limited in this embodiment. When the shape of the first hole 331 is other than circular, the diameter of the first hole 331 refers to the diameter of the inscribed circle of the first hole 331.

[0095] In order to enable the first seal 31 to better seal the motor shaft 22, in some embodiments, referring to FIG. 7 , there are multiple first seals 31 (the number of seals in FIG. 7 is two), and the multiple first seals 31 are arranged in parallel along the axial direction of the motor shaft 22, and the support member 33 seals and presses the multiple first seals 31 between the support member 33 and the movement 21.

[0096] By providing a plurality of first sealing members 31 , the sealing functions of the plurality of first sealing members 31 can be superimposed, thereby achieving a better sealing effect on the motor shaft 22 .

[0097] Specifically, the total number of the first sealing members 31 can be two, three, or four, etc. This embodiment does not limit the number of the first sealing members 31 .

[0098] In some embodiments, please continue to refer to Figure 7, the first annular deformation portion 3121 and the second annular deformation portion 3122 of at least one first seal 31 among the multiple first seals 31 are facing the side of the ring body 311 close to the extension hole 12, and the first annular deformation portion 3121 and the second annular deformation portion 3122 of the remaining first seals 31 are facing the side of the ring body 311 away from the extension hole 12.

[0099] Such an arrangement can make the first annular deformation portion 3121 and the second annular deformation portion 3122 in the multiple first seals 31 have opposite deformation directions. In this way, no matter whether the motor shaft 22 is extended or retracted, the multiple first seals 31 can play a good role in sealing the motor shaft 22, so that the multiple first seals 31 have a better movable sealing effect on the motor shaft 22.

[0100] In some embodiments, referring to FIG. 7 , a second hole 211 is provided on the movement 21 , and the motor shaft 22 passes through the second hole 211 . The diameter of the second hole 211 is smaller than the outer diameter of the second annular deformation portion 3122 and larger than the inner diameter of the first annular deformation portion 3121 .

[0101] By making the diameter of the second hole 211 smaller than the outer diameter of the second annular deformation portion 3122 and larger than the inner diameter of the first annular deformation portion 3121, the movement 21 can be just pressed against the second annular deformation portion 3122 and disengaged from the first annular deformation portion 3121. In this way, the first annular deformation portion 3121 will be in a free state with a larger movable margin, thereby enabling the first annular deformation portion 3121 to have a better movable sealing effect on the motor shaft 22.

[0102] The specific structure of the second hole 211 may be the same as or similar to the structure of the first hole 331 . For details, please refer to the description of the first hole 331 in the above embodiment, which will not be repeated in this embodiment.

[0103] In some embodiments, referring to Figures 7, 8 and 9, the second sealing member 32 includes: a first sleeve 321, a second sleeve 322 and a connecting ring 323, wherein the first sleeve 321 is sleeved on the motor shaft 22 and the outer wall of the first sleeve 321 is sealed and abutted against the inner wall of the casing 1, the inner wall of the first sleeve 321 abuts against the support member 33, the first axial end of the second sleeve 322 is set on the first sleeve 321, the second axial end of the second sleeve 322 extends to the open end 121 of the extension hole 12, the outer periphery of the connecting ring 323 is connected to the second axial end of the second sleeve 322, and the annular hole 3231 of the connecting ring 323 is used for the motor shaft 22 to pass through.

[0104] Since the second axial end of the second sleeve 322 extends to the open end 121 of the extension hole 12, the outer periphery of the connecting ring 323 is connected to the second axial end of the second sleeve 322, and the ring hole 3231 of the connecting ring 323 is used for the motor shaft 22 to pass through. Therefore, the connecting ring 323 can cover the gap between the hole wall of the extension hole 12 and the motor shaft 22. On the one hand, the connecting ring 323 can reduce the water entering the inner wall side of the first sleeve 321 through the open end 121. On the other hand, the connecting ring 323 can also play a role in covering up the ugliness to a certain extent, so that the handle 100 looks smoother in appearance, and the gap between the hole wall of the extension hole 12 and the motor shaft 22 is not directly visible, which can enhance the appearance of the handle 100.

[0105] To enhance the appearance of the watch, in some embodiments, as shown in Figures 7 and 9, the surface of the connecting ring 323 is flush with the open end 121. By making the surface of the connecting ring 323 flush with the open end 121, the handle 100 can appear smoother, thereby further enhancing the appearance of the handle 100.

[0106] Among them, the above-mentioned annular surface of the connecting ring 323 being flush with the opening end 121 can be understood in a broad sense, that is, when the annular surface of the connecting ring 323 is roughly flush with the opening end 121, it can also be considered that the annular surface of the connecting ring 323 is flush with the opening end 121. This embodiment does not make a narrow limitation on this.

[0107] In order to improve the sealing effect between the outer wall of the first sleeve 321 and the inner wall of the housing 1 , in some embodiments, referring to FIG. 7 and FIG. 9 , a convex ring 3210 extending along the circumference of the first sleeve 321 is provided on the outer wall of the first sleeve 321 .

[0108] By providing a protruding ring 3210 extending along the circumference of the first casing 321 on the outer wall of the first casing 321 , the protruding ring 3210 can enhance the sealing effect between the outer wall of the first casing 321 and the inner wall of the housing 1 .

[0109] Specifically, there may be a plurality of protruding rings 3210, which are spaced apart along the axial direction of the first housing 321. This arrangement can achieve a better sealing effect between the outer wall of the first housing 321 and the inner wall of the housing 1.

[0110] In some embodiments, referring to FIG. 7 and FIG. 9 , the surface where the outer wall of the first sleeve 321 abuts against the inner wall of the housing 1 includes an end surface 3211 and a cylindrical surface 3212 , and an angle is formed between the end surface 3211 and the cylindrical surface 3212 .

[0111] By creating an angle between the end face 3211 and the cylindrical surface 3212, the gap between the outer wall of the first sleeve 321 and the inner wall of the housing 1 can be sealed through multiple different surfaces. Therefore, the sealing effect between the outer wall of the first sleeve 321 and the inner wall of the housing 1 can be further improved.

[0112] The included angle between the end surface 3211 and the cylindrical surface 3212 may be 80°, 85°, or 90°, etc. This embodiment does not limit the included angle between the end surface 3211 and the cylindrical surface 3212.

[0113] To further enhance the sealing effect between the outer wall of the first housing 321 and the inner wall of the housing 1, in some embodiments, as shown in Figures 7 and 9, a protruding ring 3210 is provided on both the end surface 3211 and the cylindrical surface 3212. The provision of the protruding ring 3210 enhances the sealing effect between the outer wall of the first housing 321 and the inner wall of the housing 1.

[0114] In some embodiments, referring to FIG. 7 and FIG. 9 , the second sealing member 32 further includes: a third sleeve 324 , the third sleeve 324 sealing sleeve is arranged on the motor shaft 22 , the first axial end of the third sleeve 324 is connected to the annular hole 3231 of the connecting ring 323 , and the second axial end of the third sleeve 324 extends toward the inner cavity 11 .

[0115] By making the third sleeve 324 sealingly sleeved on the motor shaft 22, the third sleeve 324 can seal the motor shaft 22. With this arrangement, in addition to the first seal 31 being able to seal the motor shaft 22, the third sleeve 324 can also be used to seal the motor shaft 22, so that the motor shaft 22 can be doubly sealed, thereby achieving a better sealing effect on the motor shaft 22.

[0116] In some embodiments, referring to Figures 7, 10 and 11, the support member 33 includes: a cover portion 332 and a support portion 333, wherein the cover portion 332 is sealed and clamped between the first sealing member 31 and the second sealing member 32, and the support portion 333 is arranged on the cover portion 332 and extends between the second sleeve 322, the connecting ring 323 and the third sleeve 324.

[0117] By extending the support portion 333 between the second sleeve 322, the connecting ring 323 and the third sleeve 324, the support portion 333 can support the second sleeve 322, the connecting ring 323 and the third sleeve 324, thereby preventing the third sleeve 324 from pulling the third sleeve 324, the connecting ring 323, or even the second sleeve 322 from deviating from its original position during the telescopic movement of the motor shaft 22.

[0118] In order to allow the second sleeve 322, the connecting ring 323, or the third sleeve 324 to have a larger deformation margin, in some embodiments, referring to Figures 7 and 11, a gap is provided between the support portion 333 and the second sleeve 322, and / or a slit is provided between the support portion 333 and the connecting ring 323, and / or a slit is provided between the support portion 333 and the third sleeve 324. This configuration can reserve deformation space for the second sleeve 322, the connecting ring 323, and the third sleeve 324, thereby allowing the second sleeve 322, the connecting ring 323, or the third sleeve 324 to have a larger deformation margin.

[0119] In order to enhance the sealing effect between the inner surface of the third sleeve 324 and the motor shaft 22 , referring to FIG. 7 and FIG. 9 , in some embodiments, a sealing reinforcement portion 3241 is provided on the inner surface of the third sleeve 324 , and the sealing reinforcement portion 3241 is sealingly sleeved on the motor shaft 22 .

[0120] By providing a sealing reinforcement portion 3241 on the inner surface of the third sleeve 324 , when the sealing reinforcement portion 3241 is sealingly sleeved on the motor shaft 22 , a better sealing effect can be achieved between the inner surface of the third sleeve 324 and the motor shaft 22 .

[0121] There are many ways to implement the sealing reinforcement portion 3241 . In one possible implementation, the sealing reinforcement portion 3241 is a convex ring provided on the inner surface of the third sleeve 324 along the circumference of the third sleeve 324 .

[0122] The convex ring on the inner surface of the third sleeve 324 can achieve a sealing effect between the inner surface of the third sleeve 324 and the motor shaft 22.

[0123] Since the convex ring has a simple structure and is easy to manufacture, the manufacturing cost of the sealing reinforcement portion 3241 can be reduced to a certain extent.

[0124] Among them, the number of the above-mentioned raised rings can be multiple, and multiple raised rings are arranged on the inner surface of the third sleeve 324 at intervals along the axial direction of the third sleeve 324. In this way, multiple seals can be formed by multiple raised rings, thereby making the sealing effect between the inner surface of the third sleeve 324 and the motor shaft 22 better.

[0125] Of course, the sealing effect between the inner surface of the third sleeve 324 and the motor shaft 22 can also be enhanced by other means. For example, in other embodiments, the third sleeve 324 includes an accordion-shaped pleated section, and the pleated section sealing sleeve is arranged on the motor shaft 22.

[0126] Since the accordion-shaped pleated section can make the inner surface of the third sleeve 324 uneven while keeping the wall thickness of the third sleeve 324 uniform, on the one hand, the cost of the third sleeve 324 can be reduced, on the other hand, the material used for the third sleeve 324 can be reduced, and on the other hand, the manufacturing difficulty of the third sleeve 324 can be reduced.

[0127] The present disclosure further provides an electric toothbrush 200 . Referring to FIG. 12 , the electric toothbrush 200 includes a handle 100 and a brush head 101 . The brush head 101 is connected to a motor shaft 22 .

[0128] Among them, the structure of the handle 100 can be the same as the handle 100 described in any of the above embodiments, and can bring the same or similar beneficial effects. For details, please refer to the description of the handle 100 in the above embodiments, and this embodiment will not be repeated here.

[0129] In this embodiment, since the handle 100 can prevent the sealing component 3 from being twisted or pulled, the waterproof performance of the handle 100 is improved. Based on this, when the handle 100 is applied to the electric toothbrush 200, the waterproof performance of the electric toothbrush 200 can be improved.

[0130] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0131] The above embodiments merely illustrate several implementations of the present disclosure, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the patent disclosed herein shall be determined by the appended claims. Industrial Applicability

[0132] The handle and electric toothbrush provided by the present invention have a second seal that is disconnected from the first seal. Therefore, the second seal for sealing the extension hole and the first seal for sealing the motor shaft can be two independent components. In this way, the extension hole seal and the motor shaft seal can be separated, so that the sealing assembly will not constrain the movement of the motor shaft, and further, when the motor shaft rotates, swings or expands and contracts along the axial direction of the motor shaft relative to the first seal, it will not affect the second seal, thereby avoiding or reducing the occurrence of the entire sealing assembly being twisted or pulled during the movement of the motor shaft, thereby improving the waterproof performance of the handle and having strong industrial practicality.

Claims

1. A handle comprising: a housing, wherein the housing is provided with a protrusion hole communicating with an inner cavity of the housing; A movement assembly, the movement assembly comprising a movement and a motor shaft disposed in the movement, the movement being disposed in the housing and located in the inner cavity, the motor shaft being exposed outside the housing through the extension hole and being used to connect with the brush head; and A sealing assembly is arranged at the extension hole, and the sealing assembly includes a first seal, a second seal and a support member. The first seal is sealed on the motor shaft, the second seal is sleeved on the motor shaft, sealed against the inner wall of the casing and disconnected from the first seal, and the support member is sleeved on the motor shaft and the seal is clamped between the first seal and the second seal.

2. The handle according to claim 1, wherein The support member provides a supporting force to the first sealing member toward the motor shaft, and the support member provides a supporting force to the second sealing member toward the inner wall of the housing; The second sealing member forms a sealing fit with the hole wall of the extension hole, the first sealing member forms a sealing fit with the motor shaft, and the first sealing member forms a sealing fit with the second sealing member.

3. The handle according to claim 1, wherein The movement abuts against the support member, so that the second sealing member is sealed against the inner wall of the housing through the support member, and / or the support member seals and presses the first sealing member between the support member and the movement.

4. The handle according to any one of claims 1 to 3, wherein: The first sealing member is fixed to the motor shaft, and the second sealing member is slidably arranged relative to the motor shaft.

5. The handle according to any one of claims 1 to 3, wherein: The first sealing member and the motor shaft are slidably arranged, and the supporting member provides a supporting force for clamping the first sealing member to the motor shaft.

6. The handle according to any one of claims 1 to 3, wherein: The first sealing member comprises: an annular body, the annular body being sleeved on the motor shaft; A deformation portion is provided on the ring body along the circumference of the ring body, the deformation portion is used to seal and abut against the motor shaft, and the deformation portion abuts against the support member and / or the movement.

7. The handle according to claim 6, wherein: The deformation portion and the motor shaft are slidably arranged.

8. The handle according to claim 6, wherein: A gap is formed between the annular body and the motor shaft.

9. The handle according to claim 6, wherein: The deformation portion includes: The first annular deformation portion, one axial end of the first annular deformation portion is connected to the ring body portion, the first annular deformation portion The other axial end of the deformable portion is inclined toward the direction close to the motor shaft so as to be in sealing contact with the motor shaft; A second annular deformable portion, wherein one axial end of the second annular deformable portion is connected to the annular body portion, and the other axial end of the second annular deformable portion is inclined in a direction away from the first annular deformable portion to seal and abut against the support member.

10. The handle according to claim 9, wherein: A first hole is provided on the support member, and the motor shaft is passed through the first hole. The diameter of the first hole is smaller than the outer diameter of the second annular deformation portion and larger than the inner diameter of the first annular deformation portion, so that the support member is sealed and pressed against the second annular deformation portion and is out of contact with the first annular deformation portion, and the ring body abuts against the movement.

11. The handle according to claim 9, wherein There are multiple first sealing members, and the multiple first sealing members are arranged in parallel along the axial direction of the motor shaft. The support member seals and presses the multiple first sealing members between the support member and the movement.

12. The handle according to claim 11, wherein The first annular deformation portion and the second annular deformation portion of at least one of the multiple first seals are oriented toward the side of the ring body close to the extension hole, and the first annular deformation portion and the second annular deformation portion of the remaining first seals are oriented toward the side of the ring body away from the extension hole.

13. The handle according to claim 12, wherein: A second hole is provided on the movement, and the motor shaft is passed through the second hole. The diameter of the second hole is smaller than the outer diameter of the second annular deformation portion and larger than the inner diameter of the first annular deformation portion.

14. The handle according to any one of claims 1-3 or 7-13, wherein: The second sealing member is an integral component, and the second sealing member comprises: a first sleeve, wherein the first sleeve is sleeved on the motor shaft, an outer wall of the first sleeve is in sealing contact with an inner wall of the housing, and an inner wall of the first sleeve is in contact with the support member; a second sleeve, wherein a first axial end of the second sleeve is disposed on the first sleeve, and a second axial end of the second sleeve extends to the open end of the extension hole; and A connecting ring, the outer periphery of which is connected to the second axial end of the second sleeve body, and the annular hole of the connecting ring is used for the motor shaft to pass through.

15. The handle according to claim 14, wherein The annular surface of the connecting ring is flush with the open end.

16. The handle according to claim 14, wherein The surface where the outer wall of the first sleeve abuts against the inner wall of the housing includes an end surface and a cylindrical surface, and an angle is formed between the end surface and the cylindrical surface.

17. The handle according to claim 14, wherein The second sealing member further comprises: The third sleeve is sleeved on the motor shaft and in contact with the motor shaft. The first axial end of the sleeve is connected to the annular hole of the connecting ring, and the second axial end of the third sleeve extends toward the inner cavity.

18. The handle according to claim 17, wherein The support member comprises: a cover portion, the cover portion being tightly clamped between the first sealing member and the second sealing member; A support portion is disposed on the cover portion and extends between the second sleeve, the connecting ring and the third sleeve.

19. The handle according to claim 18, wherein There is a gap between the support portion and the second sleeve, and / or there is a gap between the support portion and the connecting ring, and / or there is a gap between the support portion and the third sleeve.

20. The handle according to any one of claims 17 to 19, wherein The inner surface of the third sleeve is provided with a sealing reinforcement portion, and the sealing reinforcement portion is sealed on the motor shaft.

21. The handle of claim 20, wherein: The sealing reinforcement portion is a convex ring provided on the inner surface of the third housing along the circumference of the third housing.

22. The handle according to any one of claims 17 to 19, wherein: The third sleeve includes a corrugated section, and the corrugated section sealing sleeve is arranged on the motor shaft.

23. An electric toothbrush, wherein: include: The handle according to any one of claims 1 to 22; A brush head is connected to the motor shaft.

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