Oral cleaning appliance handle and oral cleaning appliance

Abstract

The present disclosure relates to an oral cleaning appliance handle and an oral cleaning appliance, the oral cleaning appliance handle comprising: a housing having an inner cavity; an end head of the housing extending along a first axis direction is provided with a protruding hole in communication with the inner cavity; a drive assembly is arranged in the inner cavity; the drive assembly comprises an output shaft extending along the first axis and is configured to output power through the output shaft; the output shaft is configured to protrude out of the housing through the protruding hole; a sealing assembly comprises a first flexible member, a second flexible member and a support member; the first flexible member is configured to be located close to the protruding hole relative to the second flexible member; the support member is sleeved on the output shaft, and a sealing clamp is arranged between the first flexible member and the second flexible member; wherein the first flexible member is sealingly sleeved on the output shaft and sealingly abuts against an inner wall of the housing; the second flexible member is sealingly sleeved on the output shaft and sealingly abuts against the support member.

Description

Technical Field

[0001] This disclosure relates to the field of oral hygiene technology, specifically to an oral hygiene appliance handle and an oral hygiene appliance. Background Technology

[0002] The handle of an electric toothbrush needs to integrate core functional components such as a drive motor and a battery. To prevent liquid ingress that could cause short circuits, waterproof design is a key technical requirement. The protrusion hole on the handle housing for the output shaft is a weak point in waterproofing. The output shaft passes through this hole to connect to the brush head and performs high-frequency reciprocating or rotating motion. The dynamic fit gap between the shaft and the hole wall makes it extremely easy for liquids to enter the inner cavity.

[0003] Existing technologies typically achieve sealing by using a single waterproof seal (such as an O-ring or lip seal) at the protruding hole. However, due to long-term exposure to shaft friction, temperature changes, and chemical corrosion, these seals are prone to aging, hardening, or wear, leading to a gradual decline in sealing performance and ultimately loss of waterproofing function. This severely impacts product lifespan and safety. Utility Model Content

[0004] This disclosure aims to address the problems existing in the prior art by providing a handle for an oral cleaning appliance and an oral cleaning appliance.

[0005] According to a first aspect of this disclosure, a handle for an oral hygiene appliance is provided, comprising: A housing having an inner cavity; the end of the housing extending along a first axis is provided with an extension hole communicating with the inner cavity; A drive assembly is disposed within the cavity; the drive assembly includes an output shaft extending along the first axis and is configured to output power through the output shaft; the output shaft is configured to extend out of the housing through the extension hole; A sealing assembly includes a first flexible member, a second flexible member, and a support member; the first flexible member is configured to be located near the protrusion hole relative to the second flexible member; the support member is sleeved on the output shaft and is sealed between the first flexible member and the second flexible member; The first flexible element is sealed and sleeved on the output shaft, and abuts against the inner wall of the housing; the second flexible element is sealed and sleeved on the output shaft, and abuts against the support element.

[0006] In one embodiment of this disclosure, the output shaft is configured to cause the first flexible member to deform during operation, and / or the output shaft is configured to cause the first flexible member to deform under the action of an external force.

[0007] In one embodiment of this disclosure, at least a portion of the first flexible member is configured to seal against the protrusion orifice and is configured to have an exposed end face exposed through the protrusion orifice.

[0008] In one embodiment of this disclosure, the maximum deformation of the exposed end face in the radial direction of the housing is 1.2-5.2 mm.

[0009] In one embodiment of this disclosure, an annular groove is provided on the side of the first flexible member opposite to the protruding hole, and a portion of the support member is configured to be embedded in the annular groove; in its natural state, a predetermined gap is provided between the inner wall of the annular groove and the support member.

[0010] In one embodiment of this disclosure, the second flexible member is provided with a snap-fit ​​groove; the support member is provided with a snap-fit ​​portion adapted to the snap-fit ​​groove, the snap-fit ​​portion being configured to extend into the snap-fit ​​groove so that the second flexible member snaps into the support member.

[0011] In one embodiment of this disclosure, the snap-fit ​​portion is provided with a first stepped surface facing the protruding hole, and the snap-fit ​​groove is provided with a first inner wall surface facing away from the protruding hole; the first stepped surface is configured to abut against the first inner wall surface to restrict the degree of freedom of movement of the support member relative to the second flexible member in the first axial direction.

[0012] In one embodiment of this disclosure, the snap-fit ​​portion is provided with a second stepped surface facing the output shaft, and the snap-fit ​​groove is provided with a second inner wall surface facing away from the output shaft; the second stepped surface is configured to abut against the second inner wall surface to restrict the degree of freedom of movement of the support member relative to the second flexible member in the radial direction.

[0013] In one embodiment of this disclosure, a Y-shaped sealing ring is provided on the side of the second flexible member facing the protruding hole; when subjected to an external force in the direction of the first axis, the Y-shaped sealing ring is configured to deform to increase the sealing force of the second flexible member on the output shaft.

[0014] In one embodiment of this disclosure, the first flexible member includes an extension that mates with the Y-shaped sealing ring. In its natural state, the extension and the Y-shaped sealing ring are at a predetermined distance. Under water pressure, the first flexible member is configured to deform, and the extension is configured to move along the first axial direction to push the Y-shaped sealing ring.

[0015] In one embodiment of this disclosure, the first flexible member and / or the second flexible member are configured to be made of a soft rubber material.

[0016] According to a second aspect of this disclosure, an oral hygiene appliance is also provided, comprising: Handle of an oral hygiene appliance according to the first aspect of this disclosure; A brush head is disposed at the end of the handle of the oral hygiene appliance and is configured to be connected to the output shaft.

[0017] One beneficial effect of this disclosure is that the first flexible element is positioned close to the protrusion hole, which can directly prevent liquid from entering through the dynamic fit gap between the output shaft and the protrusion hole, thereby achieving the core waterproof function. The support element, while separating the first and second flexible elements, also provides stable support for both, preventing displacement or deformation of the seal due to high-frequency movement of the output shaft, thus ensuring sealing stability. When the first flexible element ages and wears due to long-term friction, temperature changes, or chemical corrosion, resulting in seal failure, the second flexible element can serve as a backup sealing line. Through its reliable sealing fit with the output shaft and support element, it prevents liquid that has seeped between the first flexible element and the support element from further entering the housing cavity, thereby extending the overall waterproof life of the oral cleaning appliance handle and reducing the risk of short-circuit failure of the drive component due to liquid intrusion.

[0018] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the present disclosure.

[0020] Figure 1 This is a schematic diagram of the handle structure of an oral cleaning appliance provided in one embodiment of the present disclosure; Figure 2 This is a cross-sectional view of an oral cleaning appliance provided in an embodiment of this disclosure; Figure 3 This is an exploded view of an oral hygiene appliance provided in one embodiment of this disclosure; Figure 4 This is a schematic diagram of the mounting bracket structure provided in one embodiment of the present disclosure; Figure 5 This is a schematic diagram of a shell structure provided in an embodiment of the present disclosure; Figure 6 This is a schematic diagram of a sealing assembly structure provided in an embodiment of the present disclosure; Figure 7 This is a partial cross-sectional view of the location of a sealing assembly provided in an embodiment of this disclosure; Figure 8 This is an exploded cross-sectional view of a sealing assembly provided in an embodiment of this disclosure.

[0021] Figures 1 to 8 The one-to-one correspondence between the component names and the reference numerals in the figures is as follows: 100. Handle of an oral hygiene appliance; 1. Housing; 10. Inner cavity; 11. Extension hole; 2. Drive assembly; 21. Drive motor; 211. Output shaft; 3. Mounting bracket; 301. First mounting space; 302. Second mounting space; 31. Through hole; 4. Control main board; 5. Battery; 6. Sealing assembly; 61. First flexible element; 610. Exposed end face; 611. Annular groove; 612. Extension; 62. Second flexible element; 621. Snap-fit ​​groove; 6211. First inner wall surface; 6212. Second inner wall surface; 622. Y-shaped sealing ring; 63. Support element; 631. Snap-fit ​​part; 6311. First stepped surface; 6312. Second stepped surface. Detailed Implementation

[0022] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0023] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0024] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0026] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0027] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0028] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0029] This disclosure provides a handle for an oral hygiene appliance and an oral hygiene appliance, wherein the oral hygiene appliance includes the handle. The specific structure and working principle of the oral hygiene appliance provided by this disclosure will be described in detail below with reference to the accompanying drawings, and the specific structure and working principle of the handle of the oral hygiene appliance provided by this application will also be introduced.

[0030] This disclosure provides an oral hygiene appliance, which can be an electric toothbrush, a rinsing and brushing device, or other equipment used for oral hygiene. (See reference...) Figures 1 to 3 The oral hygiene appliance includes an oral hygiene appliance handle 100 and a brush head 200. The oral hygiene appliance handle 100 includes a housing 1 and a drive assembly 2. The housing 1 is configured for gripping, allowing the user to hold the housing 1 and operate the oral hygiene appliance for oral cleaning. Figure 2 As shown, the housing 1 has an inner cavity 10 for accommodating various components of the oral hygiene appliance handle 100. For example... Figure 5 As shown, the end of the housing 1 extending along the first axis is provided with an extension hole 11 that communicates with the inner cavity 10.

[0031] like Figure 2 As shown, the drive assembly 2 is disposed in the inner cavity 10, specifically, as... Figure 3 As shown, the drive assembly 2 includes a drive motor 21, which includes an output shaft 211 and is configured to output power through the output shaft 211. The output shaft 211 is configured to extend outside the housing 1 through an extension hole 11, thereby connecting to the brush head 200 of the oral hygiene appliance. Specifically, the brush head 200 is disposed at the end of the handle 100 of the oral hygiene appliance and is configured to be connected to the output shaft 211. The brush head 200 may include bristles 201, which are formed by multiple bristle clusters for contacting teeth to achieve the brushing function. The output shaft 211 of the drive motor 21 can drive the brush head 200 to oscillate, thereby improving the cleaning effect.

[0032] In one specific embodiment of this disclosure, the drive motor 21 can be a servo motor, which can control the swing speed of the output shaft 211 with very accurate position control. This allows the output shaft 211 to reciprocate forward and reverse by a predetermined angle around its extended axis, thereby outputting swing power to drive the brush head 200 to vibrate. Users can easily clean toothbrush dirt without swinging their wrists while brushing their teeth, ensuring a cleaning effect.

[0033] A mounting bracket 3 is provided in the inner cavity 10, and the drive assembly 2 and various components in the inner cavity 10 can be fixed by the mounting bracket 3. In one embodiment of this disclosure, refer to Figure 4 The mounting bracket 3 has a first mounting space 301 for accommodating the drive assembly 2. (See reference) Figures 2 to 4 The mounting bracket 3 may also be provided with a second mounting space 302 for accommodating the battery 5. The first mounting space 301 may be connected to the second mounting space 302, so that the battery 5 in the second mounting space 302 can supply power to the drive motor 21 in the first mounting space 301.

[0034] like Figure 4 As shown, a through hole 32 is provided on the first end face of the mounting bracket 3, and the output shaft 211 is configured to extend through the through hole 32 to the outside of the first mounting space 301. The drive motor 21 is embedded in the first mounting space 301, and the end face of the drive motor 211 with the output shaft 211 abuts against the first end face of the mounting bracket 3, thereby allowing the output shaft 211 to pass through the through hole 32 and extend to the outside of the first mounting space 301, thus connecting with the brush head 200. In this way, the drive assembly 2 can be securely installed in the first mounting space 301, and the vibration of the drive motor 21 during operation will not cause relative movement of the drive assembly 2 relative to the mounting bracket 3.

[0035] refer to Figure 2 and Figure 3 A control board 4 can also be installed in the inner cavity 10. The control board 4 can be fixed on the mounting bracket 3 and connected to various components in the oral cleaning instrument handle 100, thereby controlling the coordinated operation of each component. For example, in the first axial direction, a control line can be provided at the end of the drive motor 21 away from the output shaft 211. The control board 4 can be soldered together with the control line located on the drive motor 21, thereby controlling the drive motor 21 to turn on or off.

[0036] refer to Figure 3 , Figure 6 and Figure 7 The oral hygiene appliance handle 100 also includes a sealing component 6, which provides waterproofing at the protrusion hole 11. This sealing component prevents external moisture and liquids (such as water from brushing teeth or toothpaste liquid) from entering the inner cavity 10 of the housing 1 through the protrusion hole 11, thus preventing damage to internal components such as the drive assembly 2 and the control board 4 from moisture. Specifically, the sealing component 6 includes a first flexible member 61, a second flexible member 62, and a support member 63. The first flexible member 61 is positioned closer to the protrusion hole 11 than the second flexible member 62. The support member 63 is sleeved on the output shaft 211 and is sealed between the first flexible member 61 and the second flexible member 62. Specifically, the first flexible member 61 is sealed on the output shaft 211 and abuts against the inner wall of the housing 1; the second flexible member 62 is sealed on the output shaft 211 and abuts against the support member 63.

[0037] The first flexible element 61, the second flexible element 62, and the support element 63 are all sleeved on the output shaft 211, and their relative positions are fixed. The first flexible element 61 is positioned close to the protrusion hole 11, with its inner ring tightly fitted onto the outer circumferential surface of the output shaft 211 to achieve a seal, and its outer ring tightly abutting against the inner wall of the housing 1 to form a circumferential seal. This directly prevents liquid from entering through the dynamic fit gap between the output shaft 211 and the protrusion hole 11, thereby achieving the core waterproof function. The support element 63 separates the first flexible element 61 and the second flexible element 62 while also providing stable support for both, preventing the seal from shifting or deforming due to the high-frequency movement of the output shaft 211, and ensuring the stability of the seal.

[0038] The inner ring of the second flexible element 62 is tightly fitted onto the outer circumferential surface of the output shaft 211 for sealing, while the outer ring is tightly abutted against the end face or inner wall of the support element 63 to form a seal. When the first flexible element 61 ages and wears due to long-term friction, temperature changes, or chemical corrosion, and the seal fails, the second flexible element 62 can serve as a backup sealing line. Through its reliable sealing cooperation with the output shaft 211 and the support element 63, it prevents liquid that has seeped into the space between the first flexible element 61 and the support element 63 from further entering the inner cavity 10 of the housing 1, significantly extending the overall waterproof life of the oral cleaning appliance handle 100 and reducing the risk of short circuit failure of the drive component 2 due to liquid intrusion.

[0039] In one embodiment of this disclosure, the first flexible member 61 and / or the second flexible member 62 are constructed from a soft rubber material. The soft rubber material possesses good elasticity, allowing for repeated deformation without permanent deformation. It also exhibits good water resistance and sealing properties, thereby enabling the first flexible member 61 and / or the second flexible member 62 to tightly conform to the output shaft 211 and the inner wall surface of the housing 1. Furthermore, the hardness of the soft rubber must be adapted to the sealing requirements, ensuring both easy deformation and sufficient support. The first flexible member 61 and / or the second flexible member 62 can adapt to the rotation, vibration, and displacement caused by external forces of the output shaft 211, quickly returning to its original shape after deformation and always maintaining a tight fit with the sealing surface.

[0040] In one embodiment of this disclosure, the output shaft 211 is configured to drive the first flexible member 61 to deform during operation. Specifically, when the drive motor 21 is running, it drives the output shaft 211 to rotate or reciprocate around the first axis. The movement of the output shaft 211 is transmitted to the first flexible member 61 through its tight fitting relationship with the first flexible member 61, so that the first flexible member 61 undergoes adaptive deformation with the movement of the output shaft 211.

[0041] In another embodiment of this disclosure, the output shaft 211 is configured to deform the first flexible member 61 under the action of an external force. For example, when a user brushes their teeth, the force exerted by the teeth on the brush head 200 is transmitted to the end of the output shaft 211 that extends out of the housing 1, causing the output shaft 211 to slightly shift in the radial direction. The output shaft 211 can then drive the first flexible member 61, which is sealed to it, to deform synchronously to adapt to the positional change of the output shaft 211.

[0042] The first flexible element 61 can adaptively deform with the movement of the output shaft 211 or the action of external forces, avoiding rigid constraints on the movement of the output shaft 211. This ensures the normal power output of the drive assembly 2 and prevents wear of components due to rigid friction between the output shaft 211 and the sealing assembly 6. At the same time, during the deformation process, the first flexible element 61 always maintains a tight fit with the output shaft 211 and the inner wall of the housing 1, and will not generate sealing gaps due to deformation. This ensures that the sealing performance will not fail due to deformation and improves dynamic sealing performance.

[0043] In one embodiment of this disclosure, reference is made to Figure 1 At least a portion of the first flexible member 61 is configured to seal against the protrusion hole 11 and is configured to have an exposed end face 610 exposed through the protrusion hole 11. Specifically, the end of the first flexible member 61 near the protrusion hole 11 can extend to tightly abut against the inner wall of the housing 1 where the protrusion hole 11 is provided, thereby forming a waterproof seal for the protrusion hole 11. The portion of the end face of the first flexible member 61 corresponding to the protrusion hole 11 can be exposed, thereby forming the exposed end face 610.

[0044] The exposed end face 610 directly prevents external moisture and dust from entering the inner cavity 10 through the protrusion hole 11, thus forming the first sealing barrier. Furthermore, the flexible material of the exposed end face 610 has a certain degree of elasticity, allowing it to maintain a tight fit with the protrusion hole 11 and the output shaft 211 even under slight impact or friction. It can also fill minute gaps through its own deformation, further improving sealing reliability. Moreover, the exposed end face 610 facilitates user observation of the condition of the first flexible component 61; if it shows obvious wear or aging, the user can promptly detect and replace it.

[0045] In one embodiment of this disclosure, the maximum deformation of the exposed end face 610 in the radial direction of the housing 1 is 1.2-5.2 mm. Specifically, when the output shaft 211 drives or an external force causes radial deformation of the exposed end face 610 of the first flexible member 61, the maximum displacement of the edge of the exposed end face 610 relative to its initial position is 1.2-5.2 mm. This deformation range is the effective deformation range of the exposed end face 610 within its elastic limit, and will not cause tearing or permanent deformation of the first flexible member 61. This disclosure provides sufficient adaptation space for the radial offset of the output shaft 211, avoiding restriction of the radial movement of the output shaft 211, while ensuring that the exposed end face 610 maintains a complete sealing shape after deformation.

[0046] In one embodiment of this disclosure, reference is made to Figures 6 to 8 An annular groove 611 is provided on the side of the first flexible member 61 opposite to the protrusion hole 11, and a portion of the support member 63 is configured to be embedded in the annular groove 611. In its natural state, a predetermined gap is provided between the inner wall of the annular groove 611 and the support member 63. Specifically, by embedding a portion of the support member 63 into the annular groove 611, the initial positioning of the first flexible member 61 and the support member 63 is achieved, preventing misalignment of the two along the circumferential or axial direction and improving sealing stability.

[0047] In its natural state, without external force or movement of the output shaft 211, a predetermined gap exists between the inner wall of the annular groove 611 and the outer wall of the portion into which the support member 63 is embedded. This provides sufficient space for deformation, preventing the support member 63 from rigidly blocking the deformation of the first flexible member 61 and ensuring that the first flexible member 61 can freely adapt and move with the output shaft 211. At the same time, the predetermined gap should not be too large, thereby avoiding sealing failure due to excessive gap, and balancing positioning and deformation adaptation requirements.

[0048] In one embodiment of this disclosure, reference is made to Figure 7 and Figure 8 The second flexible member 62 is provided with a snap-fit ​​groove 621, and the support member 63 is provided with a snap-fit ​​portion 631 adapted to the snap-fit ​​groove 621. The snap-fit ​​portion 631 is configured to extend into the snap-fit ​​groove 621 so that the second flexible member 62 and the support member 63 snap together. Specifically, the second flexible member 62 has a snap-fit ​​groove 621 extending circumferentially on the side facing the support member 63. The snap-fit ​​groove 621 can be annular. Correspondingly, the support member 63 has a snap-fit ​​portion 631 extending circumferentially on the end near the second flexible member 62. The snap-fit ​​portion 631 can be an annular protrusion structure. The cross-sectional shape of the snap-fit ​​groove 621 is adapted to the cross-sectional shape of the snap-fit ​​portion 631.

[0049] During assembly, the snap-fit ​​part 631 can extend into the snap-fit ​​groove 621 along the first axis direction. The second flexible member 62 and the support member 63 are snapped together and fixed through the cooperation of the groove and the protrusion, and there is no obvious relative looseness after they are snapped together. This disclosure achieves a stable assembly of the second flexible member 62 and the support member 63 through a snap-fit ​​structure, eliminating the need for additional connecting parts, simplifying the assembly process and improving production efficiency. In addition, the snap-fit ​​structure can effectively limit the relative displacement between the second flexible member 62 and the support member 63, preventing them from separating due to the movement of the output shaft 211, ensuring that the second flexible member 62 and the support member 63 are always tightly fitted, and improving the sealing stability.

[0050] In one embodiment of this disclosure, reference is made to Figure 8 The snap-fit ​​portion 631 is provided with a first stepped surface 6311 facing the protrusion hole 11, and the snap-fit ​​groove 621 is provided with a first inner wall surface 6211 facing away from the protrusion hole 11. The first stepped surface 6311 is configured to abut against the first inner wall surface 6211 to restrict the degree of freedom of movement of the support member 63 relative to the second flexible member 62 in the first axial direction. Specifically, when the snap-fit ​​portion 631 extends into the snap-fit ​​groove 621, the first stepped surface 6311 abuts tightly against the first inner wall surface 6211, thereby forming an axial limiting structure.

[0051] The axial limiting structure restricts the freedom of movement of the support member 63 and the second flexible member 62 in the first axial direction, preventing relative displacement due to axial forces (such as friction during the assembly of the output shaft 21), avoiding separation of the sealing surfaces of the second flexible member 62 and the support member 63 or the formation of gaps, and ensuring stable axial sealing performance. Furthermore, the contact between the first stepped surface 6311 and the first inner wall surface 6211 disperses axial forces, reduces local pressure on the sealing surface, prevents the second flexible member 62 from aging and deforming due to long-term pressure, and extends the service life of the sealing assembly 6.

[0052] In one embodiment of this disclosure, reference is made to Figure 8 The latching portion 631 is provided with a second stepped surface 6312 facing the output shaft 211, and the latching groove 621 is provided with a second inner wall surface 6212 facing away from the output shaft 211. The second stepped surface 6312 is configured to abut against the second inner wall surface 6212 to restrict the degree of freedom of movement of the support member 63 relative to the second flexible member 62 in the radial direction. Specifically, when the latching portion 631 extends into the latching groove 621, the second stepped surface 6312 abuts tightly against the second inner wall surface 6212, thereby forming a radial limiting structure.

[0053] The radial limiting structure restricts the relative radial displacement of the support member 63 and the second flexible member 62, preventing radial offset caused by radial vibration of the output shaft 211. This avoids gaps between the sealing surfaces of the second flexible member 62 and the output shaft 211, ensuring stable radial sealing performance. Furthermore, the radial limiting structure ensures the coaxiality of the second flexible member 62 and the output shaft 211, preventing localized wear of the second flexible member 62 due to eccentricity and extending its service life.

[0054] In one embodiment of this disclosure, reference is made to Figures 6 to 8 A Y-shaped sealing ring 622 is provided on the side of the second flexible member 62 facing the protrusion hole 11. When subjected to an external force in the direction of the first axis, the Y-shaped sealing ring 622 is configured to deform to increase the sealing force of the second flexible member 62 on the output shaft 211. Specifically, the Y-shaped sealing ring 622 is integrally formed or fixedly installed on the second flexible member 62. The opening of the Y-shaped sealing ring 622 faces the protrusion hole 11, its inner lip is tightly fitted to the outer peripheral surface of the output shaft 211, and its outer lip is in contact with the wall surface of the support member 63.

[0055] When subjected to an external force along the first axis (such as external water pressure), the lip of the Y-shaped sealing ring 622 undergoes elastic deformation, increasing the contact pressure between the inner lip and the output shaft 211, thereby enhancing the sealing force. The sealing force of the Y-shaped sealing ring 622 increases with the increase of the axial external force. For example, when the external water pressure is large, the water pressure is transmitted to the Y-shaped sealing ring 622, pushing the lip to deform and press against the output shaft 211, resulting in a stronger seal due to greater pressure.

[0056] In one embodiment of this disclosure, the first flexible member 61 includes an extension 612 that mates with a Y-shaped sealing ring 622. In its natural state, the extension 612 and the Y-shaped sealing ring 622 are at a predetermined distance. Under water pressure, the first flexible member 61 is configured to deform, and the extension 612 is configured to move along a first axial direction to push the Y-shaped sealing ring 622. Specifically, the first flexible member 61 has an extension 612 extending toward the second flexible member 62, the position of which corresponds to the opening of the Y-shaped sealing ring 622. In its natural state without water pressure, the end of the extension 612 and the Y-shaped sealing ring 622 are at a predetermined distance and do not contact each other; when external water pressure impacts the exposed end face of the first flexible member 61, the first flexible member 61 deforms toward the second flexible member 62 under the water pressure, thereby driving the extension 612 to move along the first axial direction until the end of the extension 612 abuts against and pushes the Y-shaped sealing ring 622.

[0057] This creates a water pressure-linked sealing mechanism. The greater the external water pressure, the greater the deformation of the first flexible element 61, the stronger the thrust of the extension 612 on the Y-shaped sealing ring 622, and the greater the contact pressure between the lip of the Y-shaped sealing ring 622 and the output shaft 211. The sealing force increases in a stepped manner, thus preventing leakage under high-pressure water flow. This linkage structure requires no additional power and relies entirely on water pressure for automatic triggering, thereby improving the reliability of the seal and making it suitable for use in scenarios where oral hygiene instruments frequently come into contact with water. Furthermore, in its natural state, there is a predetermined distance between the extension 612 and the Y-shaped sealing ring 622, ensuring that the extension 612 does not interfere with the Y-shaped sealing ring 622 during normal operation of the output shaft 211, preventing excessive sealing force that could cause the output shaft 211 to jam when there is no water pressure.

[0058] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A handle for an oral hygiene appliance, characterized in that, include: A housing having an inner cavity; the end of the housing extending along a first axis is provided with an extension hole communicating with the inner cavity; A drive assembly is disposed within the cavity; the drive assembly includes an output shaft extending along the first axis and is configured to output power through the output shaft; the output shaft is configured to extend out of the housing through the extension hole; The sealing assembly includes a first flexible member, a second flexible member, and a support member; The first flexible member is configured to be located near the protruding hole relative to the second flexible member; the support member is sleeved on the output shaft and is sealed between the first flexible member and the second flexible member; The first flexible element is sealed and sleeved on the output shaft, and abuts against the inner wall of the housing; the second flexible element is sealed and sleeved on the output shaft, and abuts against the support element.

2. The handle of the oral hygiene appliance according to claim 1, characterized in that, The output shaft is configured to cause the first flexible member to deform during operation, and / or the output shaft is configured to cause the first flexible member to deform under the action of an external force.

3. The handle of the oral hygiene appliance according to claim 2, characterized in that, At least a portion of the first flexible member is configured to seal against the protrusion orifice and is configured to have an exposed end face exposed through the protrusion orifice.

4. The handle of the oral hygiene appliance according to claim 3, characterized in that, In the radial direction of the housing, the maximum deformation of the exposed end face is 1.2-5.2 mm.

5. The handle of the oral hygiene appliance according to claim 2, characterized in that, An annular groove is provided on the side of the first flexible member opposite to the protruding hole, and part of the support member is configured to be embedded in the annular groove; in the natural state, a predetermined gap is provided between the inner wall of the annular groove and the support member.

6. The handle of the oral hygiene appliance according to claim 1, characterized in that, The second flexible member is provided with a snap-fit ​​groove; the support member is provided with a snap-fit ​​part adapted to the snap-fit ​​groove, the snap-fit ​​part being configured to extend into the snap-fit ​​groove so that the second flexible member and the support member snap-fit ​​together.

7. The handle of the oral hygiene appliance according to claim 6, characterized in that, The snap-fit ​​portion is provided with a first stepped surface facing the protruding hole, and the snap-fit ​​groove is provided with a first inner wall surface facing away from the protruding hole; the first stepped surface is configured to abut against the first inner wall surface to restrict the degree of freedom of movement of the support member relative to the second flexible member in the first axial direction.

8. The handle of the oral hygiene appliance according to claim 6, characterized in that, The snap-fit ​​portion is provided with a second stepped surface facing the output shaft, and the snap-fit ​​groove is provided with a second inner wall surface facing away from the output shaft; the second stepped surface is configured to abut against the second inner wall surface to restrict the degree of freedom of movement of the support member relative to the second flexible member in the radial direction.

9. The handle of the oral hygiene appliance according to claim 1, characterized in that, A Y-shaped sealing ring is provided on the side of the second flexible member facing the protruding hole; when subjected to an external force in the direction of the first axis, the Y-shaped sealing ring is configured to deform to increase the sealing force of the second flexible member on the output shaft.

10. The handle of the oral hygiene appliance according to claim 9, characterized in that, The first flexible member includes an extension that mates with the Y-shaped sealing ring. In its natural state, the extension and the Y-shaped sealing ring are at a predetermined distance. Under water pressure, the first flexible member is configured to deform, and the extension is configured to move along the first axis to push the Y-shaped sealing ring.

11. The handle of the oral hygiene appliance according to claim 1, characterized in that, The first flexible member and / or the second flexible member are configured to be made of a soft rubber material.

12. An oral hygiene appliance, characterized in that, include: Handle of the oral cleaning appliance according to any one of claims 1-11; A brush head is disposed at the end of the handle of the oral hygiene appliance and is configured to be connected to the output shaft.

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