Electric toothbrush head

Abstract

The utility model relates to an electric toothbrush head, which comprises a brush rod and a plug connector, the bottom of the brush rod is provided with a mounting hole for mounting the plug connector, the inner wall of the mounting hole is provided with a guide groove and a limit groove, the side wall of the plug connector is provided with a first guide raised line and a limit raised line, and the first guide raised line and the limit raised line are arranged in the mounting hole. The guide groove and the first guide convex strip are matched to limit the mounting direction of the plug connector and provide rotation limit for the plug connector; a plug hole is formed in the middle of the plug connector, a buckle is further arranged on the side wall of the plug connector, an elastic groove is formed in the periphery of the buckle and extends to the limiting protruding strip, and the limiting groove and the limiting protruding strip are matched to enable the plug connector to be installed in the installation hole in a limited mode. The brush head of the electric toothbrush is assembled and fixed through the structure of the brush rod and the structure of the plug connector.

Description

Technical Field

[0001] The utility model relates to the field of electric toothbrushes, in particular to an electric toothbrush head. Background Art

[0002] The brush head of an electric toothbrush is fixed to the main unit of the electric toothbrush by setting a fixing hole on one side of the brush head. The main unit outputs power to drive the brush head to vibrate, thereby cleaning the user's teeth. For some brush heads, an integral molding structure such as injection molding is generally used for manufacturing, but the processing efficiency of an integral brush head is relatively low. In order to improve the production efficiency of the other brush heads, more and more manufacturers manufacture the brush heads separately, dividing the brush heads into a brush rod with bristles and a connector for connecting to the main unit. The brush rod and the connector are formed separately and then fixed together by screws or other fixing methods. The prior art lacks a brush head structure in which the brush rod and the connector can be completely assembled and fixed through its own structure. Utility Model Content

[0003] The utility model aims to solve the above technical problems and provide an electric toothbrush head. The present application aims to provide an electric toothbrush head which is assembled and fixed by the structure of a brush rod and a connector.

[0004] In order to achieve the above purpose, the technical solutions of the utility model include:

[0005] An electric toothbrush head comprises a brush rod and a connector, wherein a mounting hole for installing the connector is provided at the bottom of the brush rod, a guide groove and a limit groove are provided on the inner wall of the mounting hole, a first guide convex strip and a limit convex strip are provided on the side wall of the connector, the guide groove and the first guide convex strip cooperate to limit the installation direction of the connector and simultaneously provide rotation limit for the connector; a connector hole is provided in the middle part of the connector, a buckle is also provided on the side wall of the connector, an elastic groove is provided around the buckle, the elastic groove extends to the limit convex strip, the limit groove and the limit convex strip cooperate to limit the connector to be installed in the mounting hole.

[0006] The electric toothbrush head of the present application is manufactured and formed separately using a brush rod and a connector. The brush rod and the connector can be processed and produced simultaneously and then assembled, thereby improving the production efficiency of the brush head. The connector cooperates with the guide groove and the limit groove in the mounting hole at the bottom of the brush rod through the first guide convex strip and the limit convex strip to form circumferential limit and axial limit, so that the connector can be completely fixed and assembled in the brush rod by itself, without the need for fixing methods such as bolts and / or glue. The assembly method is simple, and the opening of the elastic groove makes the buckle have a certain elasticity, so that the electric toothbrush head and the electric toothbrush host can be normally plugged in and out, and the elastic groove extends all the way to the limit convex strip, which also provides a certain elastic deformation ability for the limit convex strip, so that the connector can slide into the limit groove more smoothly through elastic deformation during installation in the mounting hole.

[0007] Furthermore, the brush rod is made of PP material, and the connector is made of POM material. PP material is softer than POM material, so that the brush rod can be softer than the connector.

[0008] Furthermore, after the connector is installed in the mounting hole, the bottom surface of the connector is flush with the bottom surface of the brush rod, which ensures that it is difficult to find a force application point to apply external force to the connector after the connector is installed in the mounting hole, making it difficult for the user to remove the connector from the brush rod without tools.

[0009] Furthermore, the elastic groove is connected to the plug hole, and the elastic groove is arranged on both sides and the lower side of the buckle, so that the buckle can be elastically deformed around its upper side. The buckle is used to buckle with the output shaft of the main body of the electric toothbrush, and the buckle can be elastically deformed around its upper side so that the brush head can be easily plugged in and out of the main body.

[0010] Furthermore, two second guide ridges are provided inside the mounting hole, and the guide groove is between the second guide ridges. The first guide ridge and the second guide ridge interact with each other, thereby preventing the connector from rotating in the mounting hole.

[0011] Furthermore, the connector is provided with first notches on both sides of the first guide ridge, and the position of the first notch matches the position of the second guide ridge. The first notch is a clearance position of the second guide ridge.

[0012] Furthermore, the first guide ridge and the guide groove are connected and fixed in an interference fit manner. The interference fit connection can prevent the brush head from generating noise when it is installed on the electric toothbrush and vibrates.

[0013] Furthermore, the plug-in component is provided with a second notch above the buckle, and the second notch is connected to the plug-in hole. The second notch can save materials for the plug-in component, and since the second notch is provided above the buckle, the second notch is connected to the plug-in hole, which can increase the elastic deformation capability of the buckle.

[0014] Furthermore, the size of the mounting hole is small at the top and large at the bottom, with a curved surface or a flat surface in the middle, and the side wall of the connector is set to match the size of the mounting hole. The shape of the mounting hole can facilitate the installation of the connector.

[0015] Furthermore, the electric toothbrush host comprises an output shaft, and the output shaft is inserted into the plug hole and detachably engaged with the buckle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the electric toothbrush head of the present utility model.

[0017] Figure 2 It is a cross-sectional view of the electric toothbrush head of the utility model.

[0018] Figure 3 It is a three-dimensional diagram of the brush rod of the present utility model.

[0019] Figure 4 It is a three-dimensional diagram of the plug connector of the present utility model.

[0020] Figure 5 It is a three-dimensional diagram of the connector of the utility model from another angle. DETAILED DESCRIPTION

[0021] An electric toothbrush head of the utility model is described in conjunction with the accompanying drawings.

[0022] like Figures 1 to 5The electric toothbrush head shown in the figure includes a brush rod 1 and a connector 2. The brush rod 1 is provided with bristles. The brush rod 1 and the connector 2 are manufactured separately. The brush rod 1 and the connector 2 can be processed and produced simultaneously and then assembled to improve the production efficiency of the brush head. The bottom of the brush rod 1 is provided with a mounting hole 11 for installing the connector 2. The inner wall of the mounting hole 11 is provided with a guide groove 12 and a limit groove 13. The side wall of the connector 2 is provided with a first guide ridge 24 and a limit ridge 23. The guide groove 12 and the first guide ridge 24 cooperate to limit the installation direction of the connector 2, and at the same time provide a rotation limit for the connector 2, so that the brush rod 1 and the connector 2 can be rotated. A circumferential limit is formed between the connector 2; a plug-in hole 21 is provided in the middle of the connector 2, and a buckle 22 is also provided on the side wall of the connector 2. An elastic groove 221 is provided around the buckle 22. The opening of the elastic groove 221 makes the buckle 22 have a certain elasticity, so that the electric toothbrush head and the electric toothbrush host can be normally plugged in and out, and the elastic groove 221 extends to the limiting convex strip 23. The limiting groove 13 and the limiting convex strip 23 cooperate to limit the connector 2 to be installed in the mounting hole 11, so that an axial limit is formed between the brush rod 1 and the connector 2. Through the circumferential limit and axial limit structures, the connector 2 can be completely fixed and assembled in the brush rod 1 by itself.

[0023] The brush rod 1 is made of PP material, and the connector 2 is made of POM material. The advantage of using PP material for the brush rod 1 is that the PP material is soft, which makes it convenient to set the mounting hole 11, the guide groove 12 and the limit groove 13 in the brush rod 1, and it can also be easily demolded during the processing process, so as to facilitate the connection with the connector 2. The advantage of using POM material for the connector 2 is that the POM material is hard and wear-resistant, and the connector 2 has a long service life when connected to the output shaft of the electric toothbrush host for vibration work, so that the connector 2 will not have quality problems such as fatigue fracture due to frequent disassembly and assembly of the brush head by consumers.

[0024] In a preferred embodiment, the first guide ridge 24 and the guide groove 12 are connected and fixed in an interference fit manner. The interference fit connection can prevent the brush head from generating noise when it is installed on the electric toothbrush and vibrates.

[0025] like Figure 1 and Figure 2 As shown, after the connector 2 is installed in the mounting hole 11, the bottom surface of the connector 2 is flush with the bottom surface of the brush rod 1, which can ensure that it is difficult to find a force application point to apply external force to the connector 2 after the connector 2 is installed in the mounting hole 11, and the user cannot remove the connector 2 by hand, making it difficult for the user to remove the connector 2 from the brush rod 1 without the aid of tools.

[0026] like Figure 3As shown, the size of the mounting hole 11 is small at the top and large at the bottom, with a curved or flat transition in the middle. The side wall of the connector 2 is set to match the size of the mounting hole 11, the guide groove 12 is set at the upper position of the mounting hole 11, and the limit groove 13 is set at the lower position of the mounting hole 11. The first guide ridge 24 and the limit ridge 23 on the connector 2 are also set to match the guide groove 12 and the limit groove 13 on the mounting hole 11.

[0027] like Figure 4 As shown, the elastic groove 221 is connected to the plug hole 21, and the elastic groove 221 is arranged on both sides and the lower side of the buckle 22, so that the buckle 22 can be elastically deformed around its upper side. The buckle 22 is used to buckle with the output shaft of the main unit of the electric toothbrush. The buckle 22 can be elastically deformed around its upper side so that the brush head can be easily plugged in and out of the main unit.

[0028] Two second guide ridges 121 are provided inside the mounting hole 11, and the guide grooves 12 are between the second guide ridges 121. If the connector 2 is subjected to circumferential force, the circumferential force is offset by the interaction between the first guide ridge 24 and the second guide ridge 121, thereby preventing the connector 2 from rotating in the mounting hole 11.

[0029] The connector 2 is provided with first notches 241 on both sides of the first guide ridge 24. The position of the first notch 241 matches the position of the second guide ridge 121. The first notch 241 is a clearance position for the second guide ridge 121, so that the connector 2 can be smoothly connected to the brush rod 1.

[0030] The plug connector 2 is provided with a second notch 25 above the buckle 22 . The provision of the second notch 25 can save the material of the plug connector 2 .

[0031] The second notch 25 is connected to the inserting hole 21 . Since the second notch 25 is disposed above the buckle 22 , the second notch 25 is connected to the inserting hole 21 , so as to increase the elastic deformation capability of the buckle 22 .

[0032] The electric toothbrush main unit comprises an output shaft, which is inserted into the plug hole 21 and detachably engaged with the buckle 22 .

[0033] According to the disclosure and teaching of the above description, the technical personnel in the field to which the utility model belongs can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. An electric toothbrush head, characterized in that: It includes a brush rod and a connector, wherein a mounting hole for installing the connector is provided at the bottom of the brush rod, a guide groove and a limit groove are provided on the inner wall of the mounting hole, a first guide ridge and a limit ridge are provided on the side wall of the connector, the guide groove and the first guide ridge cooperate to limit the installation direction of the connector and provide rotation limit for the connector at the same time; a connector hole is provided in the middle part of the connector, a buckle is also provided on the side wall of the connector, an elastic groove is provided around the buckle, the elastic groove extends to the limit ridge, the limit groove and the limit ridge cooperate to limit the connector to be installed in the mounting hole.

2. The electric toothbrush head according to claim 1, characterized in that: The brush rod is made of PP material, and the connector is made of POM material.

3. The electric toothbrush head according to claim 1, characterized in that: After the plug-in connector is installed in the installation hole, the bottom surface of the plug-in connector is flush with the bottom surface of the brush rod.

4. The electric toothbrush head according to claim 1, characterized in that: The elastic groove is connected to the plug hole, and the elastic groove is arranged on both sides and the lower side of the buckle, so that the buckle can be elastically deformed around the upper side thereof.

5. The electric toothbrush head according to claim 1, characterized in that: Two second guide convex strips are arranged inside the mounting hole, and the guide groove is between the second guide convex strips.

6. The electric toothbrush head according to claim 5, characterized in that: The connector is provided with first notches on both sides of the first guide ridge, and the positions of the first notches match the positions of the second guide ridge.

7. The electric toothbrush head according to claim 1, characterized in that: The first guide ridge and the guide groove are connected and fixed in an interference fit manner.

8. The electric toothbrush head according to claim 1, characterized in that: The plug-in connector is provided with a second notch above the buckle, and the second notch is connected to the plug-in hole.

9. The electric toothbrush head according to claim 1, characterized in that: The size of the mounting hole is smaller at the top and larger at the bottom, with an arc or plane transition in the middle, and the side wall of the connector is set to match the size of the mounting hole.

10. The electric toothbrush head according to claim 1, characterized in that: The electric toothbrush host comprises an output shaft, and the output shaft is inserted into the plug hole and detachably engaged with the buckle.

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