Handle and electric toothbrush

Abstract

The utility model relates to the technical field of electric toothbrushes, in particular to a handle and an electric toothbrush. The utility model relates to a handle, which comprises a machine shell, a handle, a handle, a handle and a driving device, and is characterized in that the machine shell is provided with an extending hole; the machine core assembly comprises a machine core and a motor shaft arranged on the machine core, the machine core is arranged in the machine shell and located in the inner cavity, and the motor shaft is exposed out of the machine shell through the extending hole and used for being connected with the brush head; the sealing assembly is arranged at the extending hole and comprises a first sealing piece, a second sealing piece and a supporting piece, the first sealing piece is arranged on the motor shaft in a sealing and sleeving mode, and the second sealing piece is arranged on the motor shaft in a sleeving mode, abuts against the inner wall of the machine shell in a sealing mode and is disconnected from the first sealing piece; the supporting piece is annularly arranged on the motor shaft in a sleeving mode and clamped between the first sealing piece and the second sealing piece in a sealed mode. According to the handle provided by the utility model, the sealing assembly cannot be damaged by twisting or pulling, so that the waterproof performance is better.

Description

Technical Field

[0001] The present application 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 can clean teeth, they have become increasingly popular among consumers in recent years. The motor shaft of an electric toothbrush usually needs to extend out of the extension hole on the casing 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 arranged in the gap. The sealing sleeve needs to seal the extension hole and the motor shaft. In order for the sealing sleeve to seal the motor shaft, it is usually necessary to put the sealing sleeve on the motor shaft, and a spring is arranged outside the sealing sleeve so that the sealing sleeve is tightly fixed on the motor shaft.

[0003] However, as the movement modes of the motor shaft of an electric toothbrush become more and more diversified, for example, a motor shaft that can rotate 360 ​​degrees or a motor shaft that can swing back and forth has appeared, under this kind of movement mode, the sealing sleeve fixed on the motor shaft will be twisted or pulled, seriously affecting the waterproof performance of the electric toothbrush. Utility Model Content

[0004] The present application discloses a handle and an electric toothbrush, and since the sealing component will not be twisted or pulled, the waterproof performance is better.

[0005] In order to achieve the above objectives, in a first aspect, the present application discloses a handle, comprising:

[0006] A casing, wherein the casing is provided with a protrusion hole communicating with an inner cavity of the casing;

[0007] A movement assembly, the movement assembly comprising a movement and a motor shaft disposed on 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 be connected to the brush head; and

[0008] A sealing assembly, wherein the sealing assembly is arranged at the extension hole, and the sealing assembly includes a first sealing member, a second sealing member and a supporting member, wherein the first sealing member is sealedly sleeved on the motor shaft, the second sealing member is sleeved on the motor shaft, sealingly abuts against the inner wall of the housing and is disconnected from the first sealing member, the supporting member is sleeved on the motor shaft and the sealing clamp is arranged between the first sealing member and the second sealing member, wherein the hardness of the supporting member is greater than the hardness of the first sealing member and greater than the hardness of the second sealing member.

[0009] Optionally, the support member provides a supporting force toward the motor shaft to the first sealing member, and the support member provides a supporting force toward the inner wall of the casing to the second sealing member;

[0010] The second seal forms a sealing fit with the hole wall of the extension hole, the first seal forms a sealing fit with the motor shaft, and the first seal forms a sealing fit with the second seal.

[0011] Optionally, 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.

[0012] Optionally, the first sealing member comprises:

[0013] An annular body, wherein the annular body is sleeved on the motor shaft;

[0014] A deformation portion, wherein the deformation portion is arranged 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, and the deformation portion abuts against the support member and / or the movement.

[0015] Optionally, there is a gap between the annular body and the motor shaft.

[0016] Optionally, the deformation portion includes:

[0017] A first annular deformable portion, wherein 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;

[0018] A second annular deformation portion, wherein one axial end of the second annular deformation portion is connected to the annular body portion, and the other axial end of the second annular deformation portion is inclined in a direction away from the first annular deformation portion to seal and abut against the support member.

[0019] Optionally, 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.

[0020] Optionally, there are multiple first seals, and the multiple first seals are arranged in parallel along the axial direction of the motor shaft, and the support member seals and presses the multiple first seals between the support member and the movement.

[0021] Optionally, the first annular deformation portion and the second annular deformation portion of at least one of the plurality of first seals are oriented toward a 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 a side of the ring body portion away from the extension hole.

[0022] Optionally, 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.

[0023] Optionally, the second sealing member is an integrated member, and the second sealing member comprises:

[0024] A first sleeve, wherein the first sleeve is sleeved on the motor shaft and 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;

[0025] 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 an opening end of the extension hole; and

[0026] 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.

[0027] Optionally, the annular surface of the connecting ring is flush with the open end.

[0028] Optionally, 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.

[0029] Optionally, the second sealing member further comprises:

[0030] The third sleeve is sleeved on the motor shaft and in contact with the motor shaft, the first axial end of the third sleeve is connected to the ring hole of the connecting ring, and the second axial end of the third sleeve extends toward the inner cavity.

[0031] Optionally, the support member comprises:

[0032] a cover portion, the cover portion being tightly clamped between the first sealing member and the second sealing member;

[0033] A support portion is disposed on the cover portion and extends between the second sleeve, the connecting ring and the third sleeve.

[0034] Optionally, 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.

[0035] Optionally, 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.

[0036] Optionally, the sealing enhancement portion is a convex ring arranged on the inner surface of the third sleeve along the circumferential direction of the third sleeve.

[0037] Optionally, the third sleeve includes an accordion-shaped pleated section, and the pleated section sealing sleeve is arranged on the motor shaft.

[0038] In a second aspect, the present application discloses an electric toothbrush, comprising:

[0039] The handle according to any one of the first aspects above;

[0040] A brush head is connected to the motor shaft.

[0041] Compared with the prior art, the beneficial effects of this application are:

[0042] In the present application, since the first sealing member is sleeved on the motor shaft, the motor shaft can be sealed by the first sealing member. In addition, since the second sealing member is sleeved on the motor shaft and is in sealing contact with the inner wall of the housing, the extension hole can be sealed by the second sealing member. Next, since the support member is sleeved on the motor shaft and the sealing clamp is disposed between the first sealing member and the second sealing member, the first sealing member and the second sealing member can be sealed by the support member. Thus, the purpose of sealing the gap between the entire extension hole and the motor shaft can be achieved, thereby preventing water from entering the inner cavity of the housing through the gap between the extension hole and the motor shaft, thereby achieving the purpose of waterproofing.

[0043] Among them, since the second seal is disconnected from the first seal, 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 separation of the extension hole seal and the motor shaft seal can be achieved, so that the sealing assembly will not constrain the movement of the motor shaft, and further when the motor shaft rotates, swings relative to the first seal, or telescopes back and forth along the axial direction of the motor shaft, it will not affect the second seal, thereby avoiding or reducing the occurrence of twisting or pulling of the entire sealing assembly during the movement of the motor shaft, thereby improving the waterproof performance of the handle.

[0044] In addition, since the support member is sleeved on the motor shaft and the sealing clamp is arranged between the first sealing member and the second sealing member, the support member can provide support to the first sealing member and the second sealing member, so that the first sealing member and the second sealing member can both have a better sealing effect, thereby making the handle more waterproof. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 It is a structural schematic diagram of a handle provided in an embodiment of the present application;

[0047] Figure 2 yes Figure 1 Exploded view of the middle handle;

[0048] Figure 3 yes Figure 1 A schematic diagram of the structure of the handle in another perspective;

[0049] Figure 4 yes Figure 3 The cross-sectional view of the handle at the AA position;

[0050] Figure 5 yes Figure 4 A schematic structural diagram of the first sealing member in FIG.

[0051] Figure 6 yes Figure 5 A cross-sectional view of the first sealing member at position BB;

[0052] Figure 7 is a cross-sectional view of another handle provided in an embodiment of the present application at position AA;

[0053] Figure 8 yes Figure 7 A schematic structural diagram of the second sealing member in FIG.

[0054] Fig. 9 yes Figure 8 A cross-sectional view of the second seal at the CC position;

[0055] Fig.10 yes Figure 7 A schematic diagram of the structure of the support member;

[0056] Fig.11 yes Fig.10 A cross-sectional view of the support member at the DD position;

[0057] Fig.12 It is a structural schematic diagram of an electric toothbrush provided in an embodiment of the present application.

[0058] Description of main reference numerals

[0059] 1-housing; 11-inner cavity; 12-extension hole; 121-opening end;

[0060] 2- movement assembly; 21- movement; 211- second hole; 22- motor shaft;

[0061] 3-seal assembly; 31-first seal; 311-ring body; 312-deformation part; 3121-first annular deformation part; 3122-second annular deformation part; 32-second seal; 321-first sleeve; 3210-convex ring; 3211-end face; 3212-cylinder; 322-second sleeve; 323-connecting ring; 3231-ring hole; 324-third sleeve; 3241-seal reinforcement part; 33-support; 331-first hole; 332-cover; 333-support;

[0062] 100-handle; 101-brush head; 200-electric toothbrush. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0064] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0065] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0066] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0068] The technical solution of the present application will be further described below in conjunction with specific embodiments and drawings.

[0069] The present application provides a handle 100, see Figure 1 and Figure 2 The handle 100 comprises: a housing 1, a core assembly 2 and a sealing assembly 3, wherein Figure 2 , Figure 3 and Figure 4 The casing 1 is provided with an extension hole 12 which is 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 is 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 sealing member 31, a second sealing member 32 and a supporting member 33. The first sealing member 31 is sealingly sleeved on the motor shaft 22, the second sealing member 32 is sleeved on the motor shaft 22, sealingly abuts against the inner wall of the casing 1 and is disconnected from the first sealing member 31, the supporting member 33 is ringed on the motor shaft 22 and the sealing clamp is arranged between the first sealing member 31 and the second sealing member 32, wherein the hardness of the supporting member 33 is greater than the hardness of the first sealing member 31 and greater than the hardness of the second sealing member 32.

[0070] 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. Next, since the support member 33 is sleeved on the motor shaft 22 and the sealing clamp is disposed between the first sealing member 31 and the second sealing member 32, the support member 33 can be used to seal the first sealing member 31 and the second sealing member 32. Thus, 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.

[0071] 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 telescopes back and forth 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 waterproof performance of the handle 100 is improved.

[0072] In addition, since the support member 33 is looped around the motor shaft 22 and the sealing clamp is disposed between the first sealing member 31 and the second sealing member 32, and since the hardness of the support member 33 is greater than the hardness of the first sealing member 31 and greater than the hardness of 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.

[0073] 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.

[0074] 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.

[0075] 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 seal member 31 and the second seal member 32, and this embodiment does not limit this. The first seal member 31 and the second seal member 32 may both be flexible seal members, specifically rubber seal members or polyvinyl chloride seal members, etc., and this embodiment does not limit this.

[0076] In some embodiments, see Figure 4 The support member 33 provides a supporting force toward the motor shaft 22 to the first seal 31, and the support member 33 provides a supporting force toward the inner wall of the casing 1 to the second seal 32. 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.

[0077] By making the support member 33 provide a supporting force toward the motor shaft 22 to the first sealing member 31, the sealing effect between the first sealing member 31 and the motor shaft 22 can be improved. Similarly, by making the support member 33 provide a supporting force toward the inner wall of the housing 1 to the second sealing member 32, the sealing effect of the second sealing member 32 on the inner wall of the housing 1 can be improved.

[0078] By making the second seal 32 form 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, 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.

[0079] In some embodiments, see Figure 4 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 making the movement 21 abut 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 making the second sealing member 32 and the inner wall of the housing 1, and the second sealing member 32 and the support member 33 more tightly sealed, so that the sealing effect of the second sealing member 32 is better.

[0080] Further, in some embodiments, see Figure 4 , the support member 33 seals and presses the first seal member 31 between the support member 33 and the movement 21. By making the support member 33 seal and press the first seal member 31 between the support member 33 and the movement 21, the seal between the first seal member 31 and the support member 33, and between the first seal member 31 and the movement 21 can be made tighter, thereby making the sealing effect of the first seal member 31 better.

[0081] There are many ways to implement the first seal 31. In one possible implementation, see Figure 4 , Figure 5 and Figure 6 The first sealing member 31 includes: a ring body portion 311 and a deformation portion 312, wherein the ring body portion 311 is sleeved on the motor shaft 22, and the deformation portion 312 is arranged on the ring body portion 311 along the circumference of the ring body portion 311, and the deformation portion 312 is used for sealing and abutting with the motor shaft 22, and the deformation portion 312 abuts against the support member 33 and / or the movement 21.

[0082] Since the deformation portion 312 is in sealing contact with the motor shaft 22 , when the motor shaft 22 moves, the deformation portion 312 can adapt to the movement of the motor shaft 22 and deform, so that the first sealing component 31 can have a better movable sealing effect on the motor shaft 22 .

[0083] In some embodiments, see Figure 4 and Figure 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, so that the friction between the entire first seal 31 and the motor shaft 22 becomes smaller, thereby preventing the first seal 31 from moving with the rotation or extension 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.

[0084] There are many ways to implement the above-mentioned deformation portion 312. In one possible implementation, see Figure 5 and Figure 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 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.

[0085] 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 in a direction close to the motor shaft 22 so as to be sealed and abutted 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 in a direction away from the first annular deformation portion 3121 so as to be sealed and abutted against the support member 33, the longitudinal cross-section of the first sealing member 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 sealing member 31 has the advantage of being able to deform quickly to adapt to the movement of the motor shaft 22, in addition, the inventor has found through research that the "Y"-shaped first sealing member 31 has a better effect on the active sealing of the motor shaft 22 during the telescopic movement. Therefore, when the first sealing member 31 is a "Y"-shaped first sealing member 31, the waterproof performance of the handle 100 can be further improved.

[0086] In some embodiments, see Figure 4 and Figure 6 A first hole 331 is provided on the support member 33, and the motor shaft 22 passes 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.

[0087] Since 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, when the support member 33 is sealed and pressed against the first sealing member 31, the support member 33 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.

[0088] The shape of the first hole 331 may be circular or other possible shapes, which is not limited in this embodiment. When the shape of the first hole 331 is other shapes except circular, the diameter of the first hole 331 refers to the diameter of the inscribed circle of the first hole 331.

[0089] In order to make the first seal 31 better seal the motor shaft 22, in some embodiments, see Figure 7 , the number of the first sealing member 31 is multiple ( Figure 7The number of the middle seals is two), 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.

[0090] 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 .

[0091] Specifically, the total number of the first sealing members 31 may be two, three, or four, etc., and the present embodiment does not limit the number of the first sealing members 31 .

[0092] In some embodiments, see 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 oriented toward 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 oriented toward the side of the ring body 311 away from the extension hole 12.

[0093] 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 extending or retracting, 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.

[0094] In some embodiments, see Figure 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 .

[0095] 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 making the first annular deformation portion 3121 have a better movable sealing effect on the motor shaft 22.

[0096] 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, reference may be made to the description of the first hole 331 in the above embodiment, which will not be repeated in this embodiment.

[0097] In some embodiments, see Figure 7 , Figure 8 and Fig. 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 sealingly abutted against the inner wall of the housing 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 arranged 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.

[0098] 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 effect of 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 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.

[0099] In order to make the appearance of the watch more expressive, in some embodiments, see Figure 7 and Fig. 9 , the annular surface of the connecting ring 323 is flush with the opening end 121. By making the annular surface of the connecting ring 323 flush with the opening end 121, the handle 100 can be more flat in appearance, thereby further improving the appearance of the handle 100.

[0100] Among them, the flushing of the annular surface of the connecting ring 323 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, and this embodiment does not make a narrow limitation on this.

[0101] In order to improve the sealing effect between the outer wall of the first housing 321 and the inner wall of the housing 1, in some embodiments, see Figure 7 and Fig. 9 A convex ring 3210 extending along the circumferential direction of the first sleeve body 321 is provided on the outer wall of the first sleeve body 321 .

[0102] By arranging 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 increase the sealing effect between the outer wall of the first casing 321 and the inner wall of the casing 1 .

[0103] Specifically, there may be a plurality of convex rings 3210, which are spaced apart along the axial direction of the first sleeve 321. Such a configuration can provide a better sealing effect between the outer wall of the first sleeve 321 and the inner wall of the housing 1.

[0104] In some embodiments, see Figure 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 .

[0105] 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, thereby further improving the sealing effect between the outer wall of the first sleeve 321 and the inner wall of the housing 1.

[0106] The angle between the end face 3211 and the cylindrical surface 3212 may be 80°, 85°, or 90°, etc. The angle between the end face 3211 and the cylindrical surface 3212 is not limited in this embodiment.

[0107] In order to further improve the sealing effect between the outer wall of the first casing 321 and the inner wall of the casing 1, in some embodiments, see Figure 7 and Fig. 9 The end surface 3211 and the cylindrical surface 3212 are both provided with a convex ring 3210. By providing the convex ring 3210, the sealing effect between the outer wall of the first sleeve 321 and the inner wall of the housing 1 can be better.

[0108] In some embodiments, see Figure 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 ring hole 3231 of the connecting ring 323 , and the second axial end of the third sleeve 324 extends toward the inner cavity 11 .

[0109] By making the third sleeve 324 sealingly sleeved on the motor shaft 22, the third sleeve 324 can play a role in sealing the motor shaft 22. With such a configuration, in addition to the first seal 31 being able to seal the motor shaft 22, the third sleeve 324 can also play a role in sealing 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.

[0110] In some embodiments, see Figure 7 , Fig.10 and Fig.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 into between the second sleeve 322, the connecting ring 323 and the third sleeve 324.

[0111] By allowing the support portion 333 to extend 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.

[0112] In order to make the second sleeve 322, the connecting ring 323 or the third sleeve 324 have a larger deformation margin, in some embodiments, see Figure 7 and Fig.11 There is a gap between the support portion 333 and the second sleeve 322, and / or there is a gap between the support portion 333 and the connecting ring 323, and / or there is a gap between the support portion 333 and the third sleeve 324. In this way, a deformation space can be reserved for the second sleeve 322, the connecting ring 323 and the third sleeve 324, so that the second sleeve 322, the connecting ring 323 or the third sleeve 324 has a larger deformation margin.

[0113] In order to enhance the sealing effect between the inner surface of the third sleeve 324 and the motor shaft 22, see Figure 7 and Fig. 9 In some embodiments, a sealing reinforcement portion 3241 is disposed on the inner surface of the third sleeve 324 , and the sealing reinforcement portion 3241 is sealingly sleeved on the motor shaft 22 .

[0114] 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 .

[0115] There are many ways to implement the sealing enhancement part 3241 . In one possible implementation, the sealing enhancement part 3241 is a convex ring disposed on the inner surface of the third sleeve 324 along the circumference of the third sleeve 324 .

[0116] 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 .

[0117] 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.

[0118] Among them, the number of the above-mentioned convex rings can be multiple, and the multiple convex 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 convex rings, thereby making the sealing effect between the inner surface of the third sleeve 324 and the motor shaft 22 better.

[0119] Of course, the sealing effect between the inner surface of the third sleeve 324 and the motor shaft 22 may 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 disposed on the motor shaft 22 .

[0120] Since the accordion-shaped pleated section can make the inner surface of the third sleeve 324 uneven while maintaining 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 yet another hand, the manufacturing difficulty of the third sleeve 324 can be reduced.

[0121] The present application also provides an electric toothbrush 200, see Fig.12 The electric toothbrush 200 includes a handle 100 and a brush head 101 , and the brush head 101 is connected to the motor shaft 22 .

[0122] 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.

[0123] 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.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A handle, characterized in that: include: A casing, wherein the casing is provided with a protrusion hole communicating with an inner cavity of the casing; A movement assembly, the movement assembly comprising a movement and a motor shaft disposed on 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 be connected to the brush head; and A sealing assembly, wherein the sealing assembly is arranged at the extension hole, and the sealing assembly includes a first sealing member, a second sealing member and a supporting member, wherein the first sealing member is sealedly sleeved on the motor shaft, the second sealing member is sleeved on the motor shaft, sealingly abuts against the inner wall of the housing and is disconnected from the first sealing member, the supporting member is sleeved on the motor shaft and the sealing clamp is arranged between the first sealing member and the second sealing member, wherein the hardness of the supporting member is greater than the hardness of the first sealing member and greater than the hardness of the second sealing member.

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

3. The handle according to claim 1, characterized in that: 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, characterized in that: The first sealing member comprises: An annular body, wherein the annular body is sleeved on the motor shaft; A deformation portion, wherein the deformation portion is arranged 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, and the deformation portion abuts against the support member and / or the movement.

5. The handle according to claim 4, characterized in that: A gap is provided between the annular body and the motor shaft.

6. The handle according to claim 4, characterized in that: The deformation portion comprises: A first annular deformable portion, wherein 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; A second annular deformation portion, wherein one axial end of the second annular deformation portion is connected to the annular body portion, and the other axial end of the second annular deformation portion is inclined in a direction away from the first annular deformation portion to seal and abut against the support member.

7. The handle according to claim 6, characterized in that: 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.

8. The handle according to claim 6, characterized in that: 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.

9. The handle according to claim 8, characterized in that 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.

10. The handle according to claim 9, characterized in that 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.

11. The handle according to any one of claims 1-3 or 5-10, characterized in that: The second sealing member is an integral member, and the second sealing member comprises: A first sleeve, wherein the first sleeve is sleeved on the motor shaft and 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 an opening 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.

12. The handle according to claim 11, characterized in that The annular surface of the connecting ring is flush with the open end.

13. The handle according to claim 11, characterized in that The surface where the outer wall of the first sleeve body 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.

14. The handle according to claim 11, characterized in that 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 third sleeve is connected to the ring hole of the connecting ring, and the second axial end of the third sleeve extends toward the inner cavity.

15. The handle according to claim 14, characterized in that 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.

16. The handle according to claim 15, characterized in that 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.

17. A handle according to any one of claims 14 to 16, characterized in that: 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.

18. The handle according to claim 17, characterized in that The sealing reinforcement portion is a convex ring arranged on the inner surface of the third sleeve body along the circumferential direction of the third sleeve body.

19. The handle according to any one of claims 14 to 16, characterized in that: The third sleeve body comprises an accordion-shaped pleated section, and the pleated section sealing sleeve is arranged on the motor shaft.

20. An electric toothbrush, characterized in that: include: The handle according to any one of claims 1 to 19; A brush head is connected to the motor shaft.

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