Waterproof connecting piece of motor shaft

Abstract

The utility model provides a waterproof connecting piece of a motor shaft, which comprises a top end part and a bottom end part, and the top end part and the bottom end part are integrally formed. The middle of the top end component and the middle of the bottom end component are hollowed out to form a shaft sleeve hole, the motor shaft penetrates through the shaft sleeve hole, the area, located on the inner surface of the shaft sleeve hole, of the motor shaft is fixedly connected with a limiting protruding block, the bottom end of the motor shaft is fixedly connected with a motor body, and an isolation layer is arranged on the side face of the bottom end component. And the isolating layer is in touch connection with the electric toothbrush head. The waterproof connecting piece of the motor shaft is convenient to install and good in waterproof capacity, different kinds of liquid can be prevented from entering a brush head by arranging multiple isolating layers and buffer layers, the whole connecting piece is tightly connected with the motor shaft, the waterproof capacity can be further improved, the risk that the motor shaft is damaged after water seepage is reduced, and the service life of a product is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of toothbrushes, in particular to a waterproof connector for a motor shaft. Background Art

[0002] Electric toothbrushes use the rapid rotation or vibration of the electric motor to generate high-frequency vibrations on the brush head, which instantly breaks down the toothpaste into fine foam and deeply cleans the gaps between teeth. At the same time, the vibration of the bristles can promote blood circulation in the oral cavity and massage the gum tissue. Rotating electric toothbrushes use the motor inside the toothbrush to drive the circular brush head to rotate to enhance the friction effect of the toothbrush on the teeth. This type of electric toothbrush is relatively cheap and has a relatively simple working principle.

[0003] In order to reduce the size of the electric toothbrush, the electric motor is generally installed on the handle of the electric toothbrush, and the motor shaft of the electric motor passes through the handle and is connected to the brush head, thereby driving the toothbrush to rotate.

[0004] However, since there is a gap between the handle and the brush head, water on the brush head can easily enter the electric motor through the gap after use, causing the electric motor to short-circuit or burn out. This not only easily causes danger and increases the safety risk of the electric toothbrush, but also shortens the service life of the electric toothbrush. Utility Model Content

[0005] In view of the above problems, an embodiment of the present utility model provides a waterproof connector for a motor shaft that overcomes the above problems or at least partially solves the above problems.

[0006] To achieve the above object, the utility model provides the following technical solution: a waterproof connector for a motor shaft, comprising a top component and a bottom component, wherein the top component and the bottom component are integrally formed;

[0007] A sleeve hole is hollowed out between the top component and the bottom component, and the motor shaft passes through the sleeve hole. A limiting protrusion is fixedly connected to the area on the inner surface of the sleeve hole of the motor shaft, and a motor body is fixedly connected to the bottom end of the motor shaft. An isolation layer is provided on the side of the bottom component, and the isolation layer is in contact with the brush head of the electric toothbrush.

[0008] As a further improvement of the above solution, the isolation layer is arranged around the side surface of the bottom part.

[0009] As a further improvement of the above solution, three isolation layers are arranged on the side of the bottom component, and the three isolation layers are arranged at intervals from each other.

[0010] As a further improvement of the above solution, a buffer layer is further provided on the top surface of the bottom component, and the buffer layer is arranged around the top component with the top component as the center.

[0011] As a further improvement of the above solution, the height of the inner wall of the sleeve hole is greater than the height of the outer end of the top component.

[0012] As a further improvement of the above solution, a compression layer is provided on the inner wall of the shaft sleeve hole, and the compression layer squeezes the motor shaft.

[0013] As a further improvement of the above solution, the inner radius of the compression layer increases from top to bottom so that the cross section of the sleeve hole is trapezoidal.

[0014] As a further improvement of the above solution, the radius of the top end component is smaller than the radius of the bottom end component.

[0015] As a further improvement of the above solution, the top component is made of silicone material.

[0016] As a further improvement of the above solution, the bottom component is made of silicone material.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The waterproof connector of the motor shaft is provided with a top part and a bottom part, wherein the top part and the bottom part are integrally formed; a sleeve hole is formed between the top part and the bottom part, and the motor shaft passes through the sleeve hole; an isolation layer is provided on the side of the bottom part, and the isolation layer is in contact with the brush head of the electric toothbrush. The utility model has a simple structure, is easy to install, and has good waterproof ability.

[0019] 2. The waterproof connector of this motor shaft can prevent different liquids from entering the brush head by setting up multiple isolation layers and buffer layers. The entire connector is tightly connected to the motor shaft, which can further improve the waterproof ability, reduce the risk of damage to the motor shaft after water seepage, and increase the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the assembly structure of a waterproof connector for a motor shaft of the utility model;

[0021] Figure 2 It is a side view of a waterproof connector for a motor shaft of the utility model;

[0022] Figure 3 It is a cross-sectional view of a waterproof connector for a motor shaft of the utility model;

[0023] Figure 4 It is a top view of a waterproof connector for a motor shaft of the utility model;

[0024] Figure 5It is a bottom view of a waterproof connector for a motor shaft of the utility model.

[0025] Description of main symbols:

[0026] 1. Top part; 2. Bottom part; 3. Bushing hole; 11. Compression layer; 21. Isolation layer; 22. Groove; 23. Buffer layer; 4. Motor shaft; 41. Limiting protrusion; 5. Motor body; 6. Electric toothbrush head. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0028] Example:

[0029] Please combine Figure 1-5 , respectively showing an assembly structure diagram of a waterproof connector for a motor shaft of the utility model, a side view of a waterproof connector for a motor shaft of the utility model, a cross-sectional view of a waterproof connector for a motor shaft of the utility model, a top view of a waterproof connector for a motor shaft of the utility model, and a bottom view of a waterproof connector for a motor shaft of the utility model. Specifically, the waterproof connector for the motor shaft may include: a top component 1 and a bottom component 2, wherein the top component 1 and the bottom component 2 are integrally formed;

[0030] The top component 1 and the bottom component 2 are hollowed out to form a sleeve hole 3, and the motor shaft 4 passes through the sleeve hole 3. The motor shaft 4 is fixedly connected to a limiting protrusion 41 in the area on the inner surface of the sleeve hole 3, and the bottom end of the motor shaft 4 is fixedly connected to a motor body 5. The side of the bottom component 2 is provided with an isolation layer 21, and the isolation layer 21 is in contact with the brush head of the electric toothbrush.

[0031] In the embodiment of the present application, the top part 1 and the bottom part 2 are integrally formed by the top part 1 and the bottom part 2; the top part 1 and the bottom part 2 are hollowed out to form a sleeve hole 3, the motor shaft passes through the sleeve hole 3, and the side of the bottom part 2 is provided with an isolation layer 21, and the isolation layer 21 is in contact with the brush head of the electric toothbrush. The utility model has a simple structure, is easy to install, and has good waterproof ability. By providing multiple isolation layers 21 and buffer layers 23, different liquids can be prevented from entering the brush head, and the entire connector is tightly connected to the motor shaft, which can further improve the waterproof ability, reduce the risk of damage to the motor shaft after water seepage, and increase the service life of the product.

[0032] Next, the waterproof connector of the motor shaft in this exemplary embodiment will be further described.

[0033] Reference Figure 1-5 The isolation layer 21 is arranged around the side of the bottom part 2, and its cross section is wavy. When installed and fixed, the isolation layer 21 can contact the inner wall of the electric toothbrush head.

[0034] In order to increase the waterproof sealing effect, the radius of the isolation layer 21 can be larger than the radius of the inner circle of the brush head. During installation, the inner wall of the brush head can compress the isolation layer 21, so that the isolation layer 21 is in an extruded state, allowing the isolation layer 21 to fill the inner wall of the brush head.

[0035] In order to further improve the waterproof and sealing effects, three isolation layers 21 are arranged on the side of the bottom component 2, and the three isolation layers 21 are arranged at intervals from each other.

[0036] Since the three isolation layers 21 are spaced apart from each other, a groove 22 for storing and isolating water is formed between the isolation layers 21. When water enters the brush head, it needs to pass through the three isolation layers 21 respectively, and the groove 22 can store water to prevent water from entering the inside of the brush head.

[0037] Reference Figure 1-5 In order to prevent the infiltrated water from affecting the motor shaft, a buffer layer 23 is further provided on the top surface of the bottom component 2. The buffer layer 23 is arranged around the top component 1 with the top component 1 as the center.

[0038] Specifically, when water infiltrates, the buffer layer 23 can prevent water from infiltrating into the motor shaft, thereby reducing the risk of the motor shaft being damaged after being damp or infiltrated by water.

[0039] In a specific implementation, the buffer layer 23 can be made of the same waterproof material as the isolation layer 21 .

[0040] Reference Figure 1-5 In order to clamp the motor shaft 4 and increase the contact area with the motor shaft 4, the height of the inner wall of the sleeve hole 3 is greater than the height of the outer end of the top component 1.

[0041] In actual operation, since the user may swing the electric toothbrush at will during use, the infiltrated liquid enters the inner wall of the sleeve hole 3, thereby affecting the motor shaft 4. In order to further isolate the water seepage, a compression layer 11 may be provided on the inner wall of the sleeve hole 3, and the compression layer 11 squeezes the motor shaft 4.

[0042] During installation and fixing, the motor shaft 4 can be fixed in the sleeve hole 3 by extruding the compression layer 11. The compression layer 11 can not only isolate water seepage, but also increase the contact area with the motor shaft, so that the motor shaft 4 and the entire waterproof connector are fixed more firmly.

[0043] In order to facilitate the user to install the motor shaft 4 and to make the motor shaft 4 and the sleeve hole 3 fixed more firmly and stably, the inner radius of the compression layer 11 increases from top to bottom so that the cross-section of the sleeve hole 3 is trapezoidal.

[0044] Reference Figure 1-5 In order to reduce the volume of the entire connecting piece, the radius of the top component 1 is smaller than the radius of the bottom component 2.

[0045] In addition, in actual operation, in order to reduce production costs and improve the waterproof ability of the waterproof connector, the top component 1 is made of silicone.

[0046] Furthermore, the bottom component 2 may also be made of silicone material.

[0047] The working principle of a waterproof connector for a motor shaft in an embodiment of the present application is as follows: when being installed and fixed, the motor shaft 4 is fixed in the shaft sleeve hole 3 by squeezing the compression layer 11, and at the same time, the limiting protrusion 41 on the surface of the motor shaft 4 will also press against the compression layer 11, thereby increasing the contact area. The inner wall of the electric toothbrush head 6 fits with the groove 22, so that the entire waterproof connector is fixed to the head of the motor body 5 and will not fall off. By setting the compression layer 11, not only can water seepage be isolated, but also the contact area with the motor shaft can be increased, thereby making the motor shaft 4 and the entire waterproof connector more firmly fixed.

[0048] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0049] Although the preferred embodiments of the utility model embodiments have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the utility model embodiments.

[0050] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

Claims

1. A waterproof connector for a motor shaft, characterized in that: It comprises a top part (1) and a bottom part (2), wherein the top part (1) and the bottom part (2) are integrally formed; The top component (1) and the bottom component (2) are hollowed out to form a sleeve hole (3), the motor shaft (4) passes through the sleeve hole (3), the motor shaft (4) is fixedly connected to a limiting protrusion (41) in an area located on the inner surface of the sleeve hole (3), the bottom end of the motor shaft (4) is fixedly connected to a motor body (5), and an isolation layer (21) is provided on the side of the bottom component (2), and the isolation layer (21) is in contact with the brush head (6) of the electric toothbrush.

2. A waterproof connector for a motor shaft as claimed in claim 1, characterized in that: The isolation layer (21) is arranged around the side of the bottom part (2).

3. The waterproof connector for a motor shaft according to claim 1, characterized in that: A total of three isolation layers (21) are arranged on the side surface of the bottom component (2), and the three isolation layers (21) are arranged at intervals from each other.

4. The waterproof connector for a motor shaft according to claim 1, characterized in that: The top surface of the bottom component (2) is also provided with a buffer layer (23), and the buffer layer (23) is arranged around the top component (1) with the top component (1) as the center of the circle.

5. The waterproof connector for a motor shaft according to claim 1, characterized in that: The height of the inner wall of the shaft sleeve hole (3) is greater than the height of the outer end of the top end component (1).

6. The waterproof connector for a motor shaft according to claim 1, characterized in that: The inner wall of the shaft sleeve hole (3) is provided with a compression layer (11), and the compression layer (11) squeezes the motor shaft (4).

7. A waterproof connector for a motor shaft as claimed in claim 6, characterized in that: The inner radius of the compression layer (11) increases from top to bottom, so that the cross section of the shaft sleeve hole (3) is trapezoidal.

8. The waterproof connector for a motor shaft according to claim 1, characterized in that: The radius of the top end component (1) is smaller than the radius of the bottom end component (2).

9. The waterproof connector for a motor shaft according to claim 1, characterized in that: The top component (1) is made of silicone.

10. The waterproof connector for a motor shaft according to claim 1, characterized in that: The bottom part (2) is made of silicone material.

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