Waterproof structure of electric toothbrush

Abstract

The utility model relates to the technical field of electric toothbrushes, and discloses a waterproof structure of an electric toothbrush, which is used for preventing water at the top end of the electric toothbrush, the electric toothbrush is provided with a toothbrush shell, a support frame is arranged in the toothbrush shell, a motor is mounted in the support frame, a motor shaft is arranged at the output end of the motor, and a brush head is mounted at the tail end of the motor shaft. Comprising a sealing plug, the sealing plug is arranged outside a motor shaft in a sleeving mode, the base portion of the sealing plug extends in the radial direction to form a sealing ring, the top edge portion of a toothbrush shell extends in the axial direction to form a waterproof ring of an annular boss structure, the sealing ring is arranged between a motor and the waterproof ring in the axial direction, and the lower end of the sealing ring abuts against the output end of the motor; the top end of the toothbrush is sealed by arranging the sealing plug between the motor and the toothbrush shell.

Description

Technical Field

[0001] This application belongs to the field of electric toothbrush technology and relates to a waterproof structure for an electric toothbrush. Background Technology

[0002] As a frequently used personal care appliance, electric toothbrushes expose their internal electronic components and drive motors to a humid environment for extended periods. Therefore, waterproofing is a core indicator determining the product's reliability and lifespan. Traditional electric toothbrushes often use O-rings between the motor shaft and the outer casing for static waterproofing. However, this method has significant drawbacks in practical applications: the O-rings are prone to misalignment and wear under the high-frequency reciprocating motion of the motor shaft, leading to an expansion of the sealing interface gap and allowing moisture to easily seep inwards along the motor shaft.

[0003] Therefore, how to provide a waterproof structure for an electric toothbrush, and how to achieve a stable seal between the shaft and the outer shell through the waterproof structure, has become an urgent technical problem to be solved. Utility Model Content

[0004] To overcome the problems existing in the related technologies, this application aims to provide a waterproof structure for an electric toothbrush, which can achieve a stable seal between the shaft and the outer shell through the waterproof structure.

[0005] This application is achieved through the following technical solution.

[0006] This technical solution provides a waterproof structure for an electric toothbrush, used to waterproof the top of the electric toothbrush. The electric toothbrush has a toothbrush shell, and a support frame is provided inside the toothbrush shell. A motor is installed inside the support frame, and a motor shaft is provided at the output end of the motor. A brush head is installed at the tail end of the motor shaft. The structure includes:

[0007] A sealing plug, which is fitted over the outside of the motor shaft;

[0008] The base of the sealing plug extends radially to form a sealing ring;

[0009] The top edge of the toothbrush shell extends axially to form a waterproof ring with an annular boss structure.

[0010] The sealing ring is axially positioned between the motor and the waterproof ring, with its lower end abutting against the output end of the motor and its upper end forming a sealed connection with the bottom of the waterproof ring.

[0011] This technical solution maintains a stable seal between the motor shaft and the toothbrush housing by setting a sealing plug between the motor shaft and the toothbrush housing and fixing the sealing plug through an abutment-and-joint installation method.

[0012] The present invention is further configured such that the waterproof ring has multiple abutment walls formed on the inner side of the sealing plug.

[0013] The present invention is further provided that the outer wall surface of the sealing plug is provided with a plurality of abutment ribs that form an interference fit with the abutment wall;

[0014] The radial protrusion height of each abutment rib decreases gradually from the top of the sealing plug to the bottom, forming a wedge-shaped fit structure.

[0015] The present invention is further configured such that the inner diameter of the sealing plug is smaller than the diameter of the motor shaft, so as to form a sealing fit between the sealing plug and the motor shaft.

[0016] The present invention is further configured such that the height of the sealing plug is greater than the height of the waterproof ring.

[0017] The present invention is further configured such that the sealing plug is made of silicone material.

[0018] The present invention is further provided with a protective sleeve on the outside of the toothbrush shell, the protective sleeve being used to protect the toothbrush shell.

[0019] The present invention is further configured such that the outer protective cover is made of silicone material.

[0020] The present invention is further configured such that the brush head is configured with a "U" shaped structure to adapt to the structure of human teeth.

[0021] The present invention is further configured such that the brush head is made of silicone material.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0023] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0024] Figure 1 This is a cross-sectional view shown in one embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the structure shown in one embodiment of this application;

[0026] Figure 3 This is a schematic cross-sectional view of a toothbrush casing shown in one embodiment of this application;

[0027] Figure 4 This is a schematic diagram of a sealing plug shown in one embodiment of this application;

[0028] Figure 5This is a schematic diagram showing the position of the sealing plug in one embodiment of this application;

[0029] Figure 6 This is a cross-sectional view of the sealing plug shown in one embodiment of this application.

[0030] Reference numerals: 1. Toothbrush casing; 11. Waterproof ring; 12. Abutment wall; 2. Support frame; 3. Motor; 4. Motor shaft; 5. Sealing plug; 51. Abutment rib; 52. Sealing ring; 6. Brush head; 7. Casing protective cover. Detailed Implementation

[0031] The technical solutions of some embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0033] This embodiment discloses a waterproof structure for an electric toothbrush, used to waterproof the top of the electric toothbrush. The electric toothbrush has a toothbrush shell 1, a support frame 2 inside the toothbrush shell 1, a motor 3 installed inside the support frame 2, a motor shaft 4 at the output end of the motor 3, and a brush head 6 installed at the tail end of the motor shaft 4. Figures 1-6 As shown, it includes:

[0034] Sealing plug 5 is sleeved on the outside of motor shaft 4;

[0035] The base of the sealing plug 5 extends radially to form a sealing ring 52;

[0036] A waterproof ring 11 with an annular boss structure is formed on the top edge of the toothbrush shell 1;

[0037] The sealing ring 52 is axially disposed between the motor 3 and the waterproof ring 11, with its lower end abutting against the output end of the motor 3 and its upper end forming a sealed connection with the bottom of the waterproof ring 11.

[0038] It should be noted that the motor 3 is fixed inside the support frame 2 and is supported and fixed by the support frame 2, thereby abutting against the lower end of the sealing ring 52 to compress the sealing ring 52, so that the sealing ring 52 and the bottom of the waterproof ring 11 form a sealed connection. Moreover, the protective ring 11 itself has an annular boss structure, which can be used with the sealing plug 5, which is also a boss structure, to form a locking engagement.

[0039] like Figure 4 and Figure 5 As shown, the waterproof ring 11 has multiple abutment walls 12 formed on the inner side of the sealing plug 5.

[0040] like Figure 4 and Figure 5 As shown, the outer wall surface of the sealing plug 5 is provided with a plurality of abutment ribs 51 that form an interference fit with the abutment wall 12;

[0041] The radial protrusion height of each abutment rib 51 decreases gradually from the top of the sealing plug 5 to the bottom, forming a wedge-shaped fit structure.

[0042] It should be noted that the multiple abutment ribs 51 can form multiple seals with the abutment wall 12, which improves the waterproof performance without affecting the operation of the motor shaft 4.

[0043] like Figure 5 As shown, the inner diameter of the sealing plug 5 is smaller than the diameter of the motor shaft 4 to form a sealing fit between the sealing plug 5 and the motor shaft 4.

[0044] It should be noted that the motor shaft 4 and the sealing plug 5 are interference-fitted to achieve a seal.

[0045] like Figure 5 As shown, the height of the sealing plug 5 is greater than the height of the waterproof ring 11.

[0046] like Figures 1-6 As shown, the sealing plug 5 is made of silicone. Silicone is non-toxic, odorless, chemically stable, and safe.

[0047] like Figure 1 and Figure 2 As shown, the toothbrush shell 1 is provided with a protective shell 7, which is used to protect the toothbrush shell 1.

[0048] like Figures 1-6 As shown, the outer protective cover 7 is made of silicone material.

[0049] like Figure 2 As shown, the brush head 6 is designed with a "U" shape to adapt to the structure of human teeth.

[0050] like Figures 1-6 As shown, brush head 6 is made of silicone.

[0051] Working principle: By setting a sealing plug 5 between the motor shaft 4 and the toothbrush housing 1, and by the abutting compression of the motor 3, a sealed connection is formed with the toothbrush housing 1. By fixing the sealing plug 5 through this installation method, a stable seal can be maintained between the motor shaft 4 and the toothbrush housing 1. The multiple abutting ribs 51 can cooperate to form multiple waterproof areas, improving the waterproof performance of the electric toothbrush.

[0052] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they 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 improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A waterproof structure of an electric toothbrush for waterproofing the top end of the electric toothbrush, the electric toothbrush being provided with a toothbrush shell (1), the toothbrush shell (1) being internally provided with a support frame (2), the support frame (2) being internally provided with a motor (3), the motor (3) being provided at the output end with a motor shaft (4), the motor shaft (4) being provided at the tail end with a brush head (6), characterized in that, The utility model relates to a toothbrush shell (1) and a brush head (6) which are connected to each other, and a motor (3) which is arranged in the toothbrush shell (1) and drives the brush head (6) to rotate. The utility model relates to a toothbrush shell (1) and a brush head (6) which are connected to each other, and a motor (3) which is arranged in the toothbrush shell (1) and drives the brush head (6) to rotate. The utility model relates to a toothbrush shell (1) and a brush head (6) which are connected to each other, and a motor (3) which is arranged in the toothbrush shell (1) and drives the brush head (6) to rotate. The utility model relates to a toothbrush shell (1) and a brush head (6) which are connected to each other, and a motor (3) which is arranged in the toothbrush shell (1) and drives the brush head (6) to rotate. The utility model relates to a toothbrush shell (1) and a brush head (6) which are connected to each other, and a motor (3) which is arranged in the toothbrush shell (1) and drives the brush head (6) to rotate.

2. The waterproof structure of an electric toothbrush according to claim 1, wherein The utility model relates to a toothbrush shell (1) and a brush head (6) which are connected to each other, and a motor (3) which is arranged in the toothbrush shell (1) and drives the brush head (6) to rotate.

3. The waterproof structure of an electric toothbrush according to claim 2, wherein The utility model relates to a toothbrush shell (1) and a brush head (6) which are connected to each other, and a motor (3) which is arranged in the toothbrush shell (1) and drives the brush head (6) to rotate. The utility model relates to a toothbrush shell (1) and a brush head (6) which are connected to each other, and a motor (3) which is arranged in the toothbrush shell (1) and drives the brush head (6) to rotate.

4. The waterproof structure of an electric toothbrush according to claim 1, wherein The utility model relates to a toothbrush shell (1) and a brush head (6) which are connected to each other, and a motor (3) which is arranged in the toothbrush shell (1) and drives the brush head (6) to rotate.

5. The waterproof structure of an electric toothbrush according to claim 1, wherein The utility model relates to a toothbrush shell (1) and a brush head (6) which are connected to each other, and a motor (3) which is arranged in the toothbrush shell (1) and drives the brush head (6) to rotate.

6. The waterproof structure of an electric toothbrush according to claim 1, wherein The utility model relates to a toothbrush shell (1) and a brush head (6) which are connected to each other, and a motor (3) which is arranged in the toothbrush shell (1) and drives the brush head (6) to rotate.

7. The waterproof structure of an electric toothbrush according to claim 1, wherein ​ 8. The waterproof structure of an electric toothbrush according to claim 7, wherein ​ 9. The waterproof structure of an electric toothbrush according to claim 1, wherein ​ 10. The waterproof structure of an electric toothbrush according to claim 1, wherein ​

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